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freebsd-skq/lib/dns/zone.c
dougb 78d3ed4dab Vendor import of BIND 9.6.2
2010-03-02 19:49:55 +00:00

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/*
* Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: zone.c,v 1.483.36.17 2009/12/21 04:32:42 marka Exp $ */
/*! \file */
#include <config.h>
#include <errno.h>
#include <isc/file.h>
#include <isc/mutex.h>
#include <isc/print.h>
#include <isc/random.h>
#include <isc/ratelimiter.h>
#include <isc/refcount.h>
#include <isc/rwlock.h>
#include <isc/serial.h>
#include <isc/strerror.h>
#include <isc/stats.h>
#include <isc/stdtime.h>
#include <isc/string.h>
#include <isc/taskpool.h>
#include <isc/timer.h>
#include <isc/util.h>
#include <dns/acache.h>
#include <dns/acl.h>
#include <dns/adb.h>
#include <dns/callbacks.h>
#include <dns/db.h>
#include <dns/dbiterator.h>
#include <dns/dnssec.h>
#include <dns/events.h>
#include <dns/journal.h>
#include <dns/keyvalues.h>
#include <dns/log.h>
#include <dns/master.h>
#include <dns/masterdump.h>
#include <dns/message.h>
#include <dns/name.h>
#include <dns/nsec.h>
#include <dns/nsec3.h>
#include <dns/peer.h>
#include <dns/rcode.h>
#include <dns/rdataclass.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/rdatasetiter.h>
#include <dns/rdatastruct.h>
#include <dns/rdatatype.h>
#include <dns/request.h>
#include <dns/resolver.h>
#include <dns/result.h>
#include <dns/soa.h>
#include <dns/ssu.h>
#include <dns/stats.h>
#include <dns/tsig.h>
#include <dns/xfrin.h>
#include <dns/zone.h>
#include <dst/dst.h>
#define ZONE_MAGIC ISC_MAGIC('Z', 'O', 'N', 'E')
#define DNS_ZONE_VALID(zone) ISC_MAGIC_VALID(zone, ZONE_MAGIC)
#define NOTIFY_MAGIC ISC_MAGIC('N', 't', 'f', 'y')
#define DNS_NOTIFY_VALID(notify) ISC_MAGIC_VALID(notify, NOTIFY_MAGIC)
#define STUB_MAGIC ISC_MAGIC('S', 't', 'u', 'b')
#define DNS_STUB_VALID(stub) ISC_MAGIC_VALID(stub, STUB_MAGIC)
#define ZONEMGR_MAGIC ISC_MAGIC('Z', 'm', 'g', 'r')
#define DNS_ZONEMGR_VALID(stub) ISC_MAGIC_VALID(stub, ZONEMGR_MAGIC)
#define LOAD_MAGIC ISC_MAGIC('L', 'o', 'a', 'd')
#define DNS_LOAD_VALID(load) ISC_MAGIC_VALID(load, LOAD_MAGIC)
#define FORWARD_MAGIC ISC_MAGIC('F', 'o', 'r', 'w')
#define DNS_FORWARD_VALID(load) ISC_MAGIC_VALID(load, FORWARD_MAGIC)
#define IO_MAGIC ISC_MAGIC('Z', 'm', 'I', 'O')
#define DNS_IO_VALID(load) ISC_MAGIC_VALID(load, IO_MAGIC)
/*%
* Ensure 'a' is at least 'min' but not more than 'max'.
*/
#define RANGE(a, min, max) \
(((a) < (min)) ? (min) : ((a) < (max) ? (a) : (max)))
#define NSEC3REMOVE(x) (((x) & DNS_NSEC3FLAG_REMOVE) != 0)
/*
* Default values.
*/
#define DNS_DEFAULT_IDLEIN 3600 /*%< 1 hour */
#define DNS_DEFAULT_IDLEOUT 3600 /*%< 1 hour */
#define MAX_XFER_TIME (2*3600) /*%< Documented default is 2 hours */
#ifndef DNS_MAX_EXPIRE
#define DNS_MAX_EXPIRE 14515200 /*%< 24 weeks */
#endif
#ifndef DNS_DUMP_DELAY
#define DNS_DUMP_DELAY 900 /*%< 15 minutes */
#endif
typedef struct dns_notify dns_notify_t;
typedef struct dns_stub dns_stub_t;
typedef struct dns_load dns_load_t;
typedef struct dns_forward dns_forward_t;
typedef struct dns_io dns_io_t;
typedef ISC_LIST(dns_io_t) dns_iolist_t;
typedef struct dns_signing dns_signing_t;
typedef ISC_LIST(dns_signing_t) dns_signinglist_t;
typedef struct dns_nsec3chain dns_nsec3chain_t;
typedef ISC_LIST(dns_nsec3chain_t) dns_nsec3chainlist_t;
#define DNS_ZONE_CHECKLOCK
#ifdef DNS_ZONE_CHECKLOCK
#define LOCK_ZONE(z) \
do { LOCK(&(z)->lock); \
INSIST((z)->locked == ISC_FALSE); \
(z)->locked = ISC_TRUE; \
} while (0)
#define UNLOCK_ZONE(z) \
do { (z)->locked = ISC_FALSE; UNLOCK(&(z)->lock); } while (0)
#define LOCKED_ZONE(z) ((z)->locked)
#else
#define LOCK_ZONE(z) LOCK(&(z)->lock)
#define UNLOCK_ZONE(z) UNLOCK(&(z)->lock)
#define LOCKED_ZONE(z) ISC_TRUE
#endif
#ifdef ISC_RWLOCK_USEATOMIC
#define ZONEDB_INITLOCK(l) isc_rwlock_init((l), 0, 0)
#define ZONEDB_DESTROYLOCK(l) isc_rwlock_destroy(l)
#define ZONEDB_LOCK(l, t) RWLOCK((l), (t))
#define ZONEDB_UNLOCK(l, t) RWUNLOCK((l), (t))
#else
#define ZONEDB_INITLOCK(l) isc_mutex_init(l)
#define ZONEDB_DESTROYLOCK(l) DESTROYLOCK(l)
#define ZONEDB_LOCK(l, t) LOCK(l)
#define ZONEDB_UNLOCK(l, t) UNLOCK(l)
#endif
struct dns_zone {
/* Unlocked */
unsigned int magic;
isc_mutex_t lock;
#ifdef DNS_ZONE_CHECKLOCK
isc_boolean_t locked;
#endif
isc_mem_t *mctx;
isc_refcount_t erefs;
#ifdef ISC_RWLOCK_USEATOMIC
isc_rwlock_t dblock;
#else
isc_mutex_t dblock;
#endif
dns_db_t *db; /* Locked by dblock */
/* Locked */
dns_zonemgr_t *zmgr;
ISC_LINK(dns_zone_t) link; /* Used by zmgr. */
isc_timer_t *timer;
unsigned int irefs;
dns_name_t origin;
char *masterfile;
dns_masterformat_t masterformat;
char *journal;
isc_int32_t journalsize;
dns_rdataclass_t rdclass;
dns_zonetype_t type;
unsigned int flags;
unsigned int options;
unsigned int db_argc;
char **db_argv;
isc_time_t expiretime;
isc_time_t refreshtime;
isc_time_t dumptime;
isc_time_t loadtime;
isc_time_t notifytime;
isc_time_t resigntime;
isc_time_t keywarntime;
isc_time_t signingtime;
isc_time_t nsec3chaintime;
isc_uint32_t refresh;
isc_uint32_t retry;
isc_uint32_t expire;
isc_uint32_t minimum;
isc_stdtime_t key_expiry;
char *keydirectory;
isc_uint32_t maxrefresh;
isc_uint32_t minrefresh;
isc_uint32_t maxretry;
isc_uint32_t minretry;
isc_sockaddr_t *masters;
dns_name_t **masterkeynames;
isc_boolean_t *mastersok;
unsigned int masterscnt;
unsigned int curmaster;
isc_sockaddr_t masteraddr;
dns_notifytype_t notifytype;
isc_sockaddr_t *notify;
unsigned int notifycnt;
isc_sockaddr_t notifyfrom;
isc_task_t *task;
isc_sockaddr_t notifysrc4;
isc_sockaddr_t notifysrc6;
isc_sockaddr_t xfrsource4;
isc_sockaddr_t xfrsource6;
isc_sockaddr_t altxfrsource4;
isc_sockaddr_t altxfrsource6;
isc_sockaddr_t sourceaddr;
dns_xfrin_ctx_t *xfr; /* task locked */
dns_tsigkey_t *tsigkey; /* key used for xfr */
/* Access Control Lists */
dns_acl_t *update_acl;
dns_acl_t *forward_acl;
dns_acl_t *notify_acl;
dns_acl_t *query_acl;
dns_acl_t *queryon_acl;
dns_acl_t *xfr_acl;
isc_boolean_t update_disabled;
isc_boolean_t zero_no_soa_ttl;
dns_severity_t check_names;
ISC_LIST(dns_notify_t) notifies;
dns_request_t *request;
dns_loadctx_t *lctx;
dns_io_t *readio;
dns_dumpctx_t *dctx;
dns_io_t *writeio;
isc_uint32_t maxxfrin;
isc_uint32_t maxxfrout;
isc_uint32_t idlein;
isc_uint32_t idleout;
isc_event_t ctlevent;
dns_ssutable_t *ssutable;
isc_uint32_t sigvalidityinterval;
isc_uint32_t sigresigninginterval;
dns_view_t *view;
dns_acache_t *acache;
dns_checkmxfunc_t checkmx;
dns_checksrvfunc_t checksrv;
dns_checknsfunc_t checkns;
/*%
* Zones in certain states such as "waiting for zone transfer"
* or "zone transfer in progress" are kept on per-state linked lists
* in the zone manager using the 'statelink' field. The 'statelist'
* field points at the list the zone is currently on. It the zone
* is not on any such list, statelist is NULL.
*/
ISC_LINK(dns_zone_t) statelink;
dns_zonelist_t *statelist;
/*%
* Statistics counters about zone management.
*/
isc_stats_t *stats;
/*%
* Optional per-zone statistics counters. Counted outside of this
* module.
*/
isc_boolean_t requeststats_on;
isc_stats_t *requeststats;
isc_uint32_t notifydelay;
dns_isselffunc_t isself;
void *isselfarg;
char * strnamerd;
char * strname;
char * strrdclass;
char * strviewname;
/*%
* Serial number for deferred journal compaction.
*/
isc_uint32_t compact_serial;
/*%
* Keys that are signing the zone for the first time.
*/
dns_signinglist_t signing;
dns_nsec3chainlist_t nsec3chain;
/*%
* Signing / re-signing quantum stopping parameters.
*/
isc_uint32_t signatures;
isc_uint32_t nodes;
dns_rdatatype_t privatetype;
};
#define DNS_ZONE_FLAG(z,f) (ISC_TF(((z)->flags & (f)) != 0))
#define DNS_ZONE_SETFLAG(z,f) do { \
INSIST(LOCKED_ZONE(z)); \
(z)->flags |= (f); \
} while (0)
#define DNS_ZONE_CLRFLAG(z,f) do { \
INSIST(LOCKED_ZONE(z)); \
(z)->flags &= ~(f); \
} while (0)
/* XXX MPA these may need to go back into zone.h */
#define DNS_ZONEFLG_REFRESH 0x00000001U /*%< refresh check in progress */
#define DNS_ZONEFLG_NEEDDUMP 0x00000002U /*%< zone need consolidation */
#define DNS_ZONEFLG_USEVC 0x00000004U /*%< use tcp for refresh query */
#define DNS_ZONEFLG_DUMPING 0x00000008U /*%< a dump is in progress */
#define DNS_ZONEFLG_HASINCLUDE 0x00000010U /*%< $INCLUDE in zone file */
#define DNS_ZONEFLG_LOADED 0x00000020U /*%< database has loaded */
#define DNS_ZONEFLG_EXITING 0x00000040U /*%< zone is being destroyed */
#define DNS_ZONEFLG_EXPIRED 0x00000080U /*%< zone has expired */
#define DNS_ZONEFLG_NEEDREFRESH 0x00000100U /*%< refresh check needed */
#define DNS_ZONEFLG_UPTODATE 0x00000200U /*%< zone contents are
* uptodate */
#define DNS_ZONEFLG_NEEDNOTIFY 0x00000400U /*%< need to send out notify
* messages */
#define DNS_ZONEFLG_DIFFONRELOAD 0x00000800U /*%< generate a journal diff on
* reload */
#define DNS_ZONEFLG_NOMASTERS 0x00001000U /*%< an attempt to refresh a
* zone with no masters
* occurred */
#define DNS_ZONEFLG_LOADING 0x00002000U /*%< load from disk in progress*/
#define DNS_ZONEFLG_HAVETIMERS 0x00004000U /*%< timer values have been set
* from SOA (if not set, we
* are still using
* default timer values) */
#define DNS_ZONEFLG_FORCEXFER 0x00008000U /*%< Force a zone xfer */
#define DNS_ZONEFLG_NOREFRESH 0x00010000U
#define DNS_ZONEFLG_DIALNOTIFY 0x00020000U
#define DNS_ZONEFLG_DIALREFRESH 0x00040000U
#define DNS_ZONEFLG_SHUTDOWN 0x00080000U
#define DNS_ZONEFLAG_NOIXFR 0x00100000U /*%< IXFR failed, force AXFR */
#define DNS_ZONEFLG_FLUSH 0x00200000U
#define DNS_ZONEFLG_NOEDNS 0x00400000U
#define DNS_ZONEFLG_USEALTXFRSRC 0x00800000U
#define DNS_ZONEFLG_SOABEFOREAXFR 0x01000000U
#define DNS_ZONEFLG_NEEDCOMPACT 0x02000000U
#define DNS_ZONEFLG_REFRESHING 0x04000000U /*%< Refreshing keydata */
#define DNS_ZONEFLG_THAW 0x08000000U
#define DNS_ZONE_OPTION(z,o) (((z)->options & (o)) != 0)
/* Flags for zone_load() */
#define DNS_ZONELOADFLAG_NOSTAT 0x00000001U /* Do not stat() master files */
#define DNS_ZONELOADFLAG_THAW 0x00000002U /* Thaw the zone on successful
load. */
#define UNREACH_CHACHE_SIZE 10U
#define UNREACH_HOLD_TIME 600 /* 10 minutes */
#define CHECK(op) \
do { result = (op); \
if (result != ISC_R_SUCCESS) goto failure; \
} while (0)
struct dns_unreachable {
isc_sockaddr_t remote;
isc_sockaddr_t local;
isc_uint32_t expire;
isc_uint32_t last;
};
struct dns_zonemgr {
unsigned int magic;
isc_mem_t * mctx;
int refs; /* Locked by rwlock */
isc_taskmgr_t * taskmgr;
isc_timermgr_t * timermgr;
isc_socketmgr_t * socketmgr;
isc_taskpool_t * zonetasks;
isc_task_t * task;
isc_ratelimiter_t * rl;
isc_rwlock_t rwlock;
isc_mutex_t iolock;
/* Locked by rwlock. */
dns_zonelist_t zones;
dns_zonelist_t waiting_for_xfrin;
dns_zonelist_t xfrin_in_progress;
/* Configuration data. */
isc_uint32_t transfersin;
isc_uint32_t transfersperns;
unsigned int serialqueryrate;
/* Locked by iolock */
isc_uint32_t iolimit;
isc_uint32_t ioactive;
dns_iolist_t high;
dns_iolist_t low;
/* Locked by rwlock. */
/* LRU cache */
struct dns_unreachable unreachable[UNREACH_CHACHE_SIZE];
};
/*%
* Hold notify state.
*/
struct dns_notify {
unsigned int magic;
unsigned int flags;
isc_mem_t *mctx;
dns_zone_t *zone;
dns_adbfind_t *find;
dns_request_t *request;
dns_name_t ns;
isc_sockaddr_t dst;
ISC_LINK(dns_notify_t) link;
};
#define DNS_NOTIFY_NOSOA 0x0001U
/*%
* dns_stub holds state while performing a 'stub' transfer.
* 'db' is the zone's 'db' or a new one if this is the initial
* transfer.
*/
struct dns_stub {
unsigned int magic;
isc_mem_t *mctx;
dns_zone_t *zone;
dns_db_t *db;
dns_dbversion_t *version;
};
/*%
* Hold load state.
*/
struct dns_load {
unsigned int magic;
isc_mem_t *mctx;
dns_zone_t *zone;
dns_db_t *db;
isc_time_t loadtime;
dns_rdatacallbacks_t callbacks;
};
/*%
* Hold forward state.
*/
struct dns_forward {
unsigned int magic;
isc_mem_t *mctx;
dns_zone_t *zone;
isc_buffer_t *msgbuf;
dns_request_t *request;
isc_uint32_t which;
isc_sockaddr_t addr;
dns_updatecallback_t callback;
void *callback_arg;
};
/*%
* Hold IO request state.
*/
struct dns_io {
unsigned int magic;
dns_zonemgr_t *zmgr;
isc_boolean_t high;
isc_task_t *task;
ISC_LINK(dns_io_t) link;
isc_event_t *event;
};
/*%
* Hold state for when we are signing a zone with a new
* DNSKEY as result of an update.
*/
struct dns_signing {
unsigned int magic;
dns_db_t *db;
dns_dbiterator_t *dbiterator;
dns_secalg_t algorithm;
isc_uint16_t keyid;
isc_boolean_t delete;
isc_boolean_t done;
ISC_LINK(dns_signing_t) link;
};
struct dns_nsec3chain {
unsigned int magic;
dns_db_t *db;
dns_dbiterator_t *dbiterator;
dns_rdata_nsec3param_t nsec3param;
unsigned char salt[255];
isc_boolean_t done;
isc_boolean_t seen_nsec;
isc_boolean_t delete_nsec;
isc_boolean_t save_delete_nsec;
ISC_LINK(dns_nsec3chain_t) link;
};
/*%<
* 'dbiterator' contains a iterator for the database. If we are creating
* a NSEC3 chain only the non-NSEC3 nodes will be iterated. If we are
* removing a NSEC3 chain then both NSEC3 and non-NSEC3 nodes will be
* iterated.
*
* 'nsec3param' contains the parameters of the NSEC3 chain being created
* or removed.
*
* 'salt' is buffer space and is referenced via 'nsec3param.salt'.
*
* 'seen_nsec' will be set to true if, while iterating the zone to create a
* NSEC3 chain, a NSEC record is seen.
*
* 'delete_nsec' will be set to true if, at the completion of the creation
* of a NSEC3 chain, 'seen_nsec' is true. If 'delete_nsec' is true then we
* are in the process of deleting the NSEC chain.
*
* 'save_delete_nsec' is used to store the initial state of 'delete_nsec'
* so it can be recovered in the event of a error.
*/
#define SEND_BUFFER_SIZE 2048
static void zone_settimer(dns_zone_t *, isc_time_t *);
static void cancel_refresh(dns_zone_t *);
static void zone_debuglog(dns_zone_t *zone, const char *, int debuglevel,
const char *msg, ...) ISC_FORMAT_PRINTF(4, 5);
static void notify_log(dns_zone_t *zone, int level, const char *fmt, ...)
ISC_FORMAT_PRINTF(3, 4);
static void queue_xfrin(dns_zone_t *zone);
static void zone_unload(dns_zone_t *zone);
static void zone_expire(dns_zone_t *zone);
static void zone_iattach(dns_zone_t *source, dns_zone_t **target);
static void zone_idetach(dns_zone_t **zonep);
static isc_result_t zone_replacedb(dns_zone_t *zone, dns_db_t *db,
isc_boolean_t dump);
static inline void zone_attachdb(dns_zone_t *zone, dns_db_t *db);
static inline void zone_detachdb(dns_zone_t *zone);
static isc_result_t default_journal(dns_zone_t *zone);
static void zone_xfrdone(dns_zone_t *zone, isc_result_t result);
static isc_result_t zone_postload(dns_zone_t *zone, dns_db_t *db,
isc_time_t loadtime, isc_result_t result);
static void zone_needdump(dns_zone_t *zone, unsigned int delay);
static void zone_shutdown(isc_task_t *, isc_event_t *);
static void zone_loaddone(void *arg, isc_result_t result);
static isc_result_t zone_startload(dns_db_t *db, dns_zone_t *zone,
isc_time_t loadtime);
static void zone_namerd_tostr(dns_zone_t *zone, char *buf, size_t length);
static void zone_name_tostr(dns_zone_t *zone, char *buf, size_t length);
static void zone_rdclass_tostr(dns_zone_t *zone, char *buf, size_t length);
static void zone_viewname_tostr(dns_zone_t *zone, char *buf, size_t length);
#if 0
/* ondestroy example */
static void dns_zonemgr_dbdestroyed(isc_task_t *task, isc_event_t *event);
#endif
static void refresh_callback(isc_task_t *, isc_event_t *);
static void stub_callback(isc_task_t *, isc_event_t *);
static void queue_soa_query(dns_zone_t *zone);
static void soa_query(isc_task_t *, isc_event_t *);
static void ns_query(dns_zone_t *zone, dns_rdataset_t *soardataset,
dns_stub_t *stub);
static int message_count(dns_message_t *msg, dns_section_t section,
dns_rdatatype_t type);
static void notify_cancel(dns_zone_t *zone);
static void notify_find_address(dns_notify_t *notify);
static void notify_send(dns_notify_t *notify);
static isc_result_t notify_createmessage(dns_zone_t *zone,
unsigned int flags,
dns_message_t **messagep);
static void notify_done(isc_task_t *task, isc_event_t *event);
static void notify_send_toaddr(isc_task_t *task, isc_event_t *event);
static isc_result_t zone_dump(dns_zone_t *, isc_boolean_t);
static void got_transfer_quota(isc_task_t *task, isc_event_t *event);
static isc_result_t zmgr_start_xfrin_ifquota(dns_zonemgr_t *zmgr,
dns_zone_t *zone);
static void zmgr_resume_xfrs(dns_zonemgr_t *zmgr, isc_boolean_t multi);
static void zonemgr_free(dns_zonemgr_t *zmgr);
static isc_result_t zonemgr_getio(dns_zonemgr_t *zmgr, isc_boolean_t high,
isc_task_t *task, isc_taskaction_t action,
void *arg, dns_io_t **iop);
static void zonemgr_putio(dns_io_t **iop);
static void zonemgr_cancelio(dns_io_t *io);
static isc_result_t
zone_get_from_db(dns_zone_t *zone, dns_db_t *db, unsigned int *nscount,
unsigned int *soacount, isc_uint32_t *serial,
isc_uint32_t *refresh, isc_uint32_t *retry,
isc_uint32_t *expire, isc_uint32_t *minimum,
unsigned int *errors);
static void zone_freedbargs(dns_zone_t *zone);
static void forward_callback(isc_task_t *task, isc_event_t *event);
static void zone_saveunique(dns_zone_t *zone, const char *path,
const char *templat);
static void zone_maintenance(dns_zone_t *zone);
static void zone_notify(dns_zone_t *zone, isc_time_t *now);
static void dump_done(void *arg, isc_result_t result);
static isc_boolean_t dns_zonemgr_unreachable(dns_zonemgr_t *zmgr,
isc_sockaddr_t *remote,
isc_sockaddr_t *local,
isc_time_t *now);
static isc_result_t zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm,
isc_uint16_t keyid, isc_boolean_t delete);
#define ENTER zone_debuglog(zone, me, 1, "enter")
static const unsigned int dbargc_default = 1;
static const char *dbargv_default[] = { "rbt" };
#define DNS_ZONE_JITTER_ADD(a, b, c) \
do { \
isc_interval_t _i; \
isc_uint32_t _j; \
_j = isc_random_jitter((b), (b)/4); \
isc_interval_set(&_i, _j, 0); \
if (isc_time_add((a), &_i, (c)) != ISC_R_SUCCESS) { \
dns_zone_log(zone, ISC_LOG_WARNING, \
"epoch approaching: upgrade required: " \
"now + %s failed", #b); \
isc_interval_set(&_i, _j/2, 0); \
(void)isc_time_add((a), &_i, (c)); \
} \
} while (0)
#define DNS_ZONE_TIME_ADD(a, b, c) \
do { \
isc_interval_t _i; \
isc_interval_set(&_i, (b), 0); \
if (isc_time_add((a), &_i, (c)) != ISC_R_SUCCESS) { \
dns_zone_log(zone, ISC_LOG_WARNING, \
"epoch approaching: upgrade required: " \
"now + %s failed", #b); \
isc_interval_set(&_i, (b)/2, 0); \
(void)isc_time_add((a), &_i, (c)); \
} \
} while (0)
/*%
* Increment resolver-related statistics counters. Zone must be locked.
*/
static inline void
inc_stats(dns_zone_t *zone, isc_statscounter_t counter) {
if (zone->stats != NULL)
isc_stats_increment(zone->stats, counter);
}
/***
*** Public functions.
***/
isc_result_t
dns_zone_create(dns_zone_t **zonep, isc_mem_t *mctx) {
isc_result_t result;
dns_zone_t *zone;
isc_time_t now;
REQUIRE(zonep != NULL && *zonep == NULL);
REQUIRE(mctx != NULL);
TIME_NOW(&now);
zone = isc_mem_get(mctx, sizeof(*zone));
if (zone == NULL)
return (ISC_R_NOMEMORY);
zone->mctx = NULL;
isc_mem_attach(mctx, &zone->mctx);
result = isc_mutex_init(&zone->lock);
if (result != ISC_R_SUCCESS)
goto free_zone;
result = ZONEDB_INITLOCK(&zone->dblock);
if (result != ISC_R_SUCCESS)
goto free_mutex;
/* XXX MPA check that all elements are initialised */
#ifdef DNS_ZONE_CHECKLOCK
zone->locked = ISC_FALSE;
#endif
zone->db = NULL;
zone->zmgr = NULL;
ISC_LINK_INIT(zone, link);
result = isc_refcount_init(&zone->erefs, 1); /* Implicit attach. */
if (result != ISC_R_SUCCESS)
goto free_dblock;
zone->irefs = 0;
dns_name_init(&zone->origin, NULL);
zone->strnamerd = NULL;
zone->strname = NULL;
zone->strrdclass = NULL;
zone->strviewname = NULL;
zone->masterfile = NULL;
zone->masterformat = dns_masterformat_none;
zone->keydirectory = NULL;
zone->journalsize = -1;
zone->journal = NULL;
zone->rdclass = dns_rdataclass_none;
zone->type = dns_zone_none;
zone->flags = 0;
zone->options = 0;
zone->db_argc = 0;
zone->db_argv = NULL;
isc_time_settoepoch(&zone->expiretime);
isc_time_settoepoch(&zone->refreshtime);
isc_time_settoepoch(&zone->dumptime);
isc_time_settoepoch(&zone->loadtime);
zone->notifytime = now;
isc_time_settoepoch(&zone->resigntime);
isc_time_settoepoch(&zone->keywarntime);
isc_time_settoepoch(&zone->signingtime);
isc_time_settoepoch(&zone->nsec3chaintime);
zone->refresh = DNS_ZONE_DEFAULTREFRESH;
zone->retry = DNS_ZONE_DEFAULTRETRY;
zone->expire = 0;
zone->minimum = 0;
zone->maxrefresh = DNS_ZONE_MAXREFRESH;
zone->minrefresh = DNS_ZONE_MINREFRESH;
zone->maxretry = DNS_ZONE_MAXRETRY;
zone->minretry = DNS_ZONE_MINRETRY;
zone->masters = NULL;
zone->masterkeynames = NULL;
zone->mastersok = NULL;
zone->masterscnt = 0;
zone->curmaster = 0;
zone->notify = NULL;
zone->notifytype = dns_notifytype_yes;
zone->notifycnt = 0;
zone->task = NULL;
zone->update_acl = NULL;
zone->forward_acl = NULL;
zone->notify_acl = NULL;
zone->query_acl = NULL;
zone->queryon_acl = NULL;
zone->xfr_acl = NULL;
zone->update_disabled = ISC_FALSE;
zone->zero_no_soa_ttl = ISC_TRUE;
zone->check_names = dns_severity_ignore;
zone->request = NULL;
zone->lctx = NULL;
zone->readio = NULL;
zone->dctx = NULL;
zone->writeio = NULL;
zone->timer = NULL;
zone->idlein = DNS_DEFAULT_IDLEIN;
zone->idleout = DNS_DEFAULT_IDLEOUT;
ISC_LIST_INIT(zone->notifies);
isc_sockaddr_any(&zone->notifysrc4);
isc_sockaddr_any6(&zone->notifysrc6);
isc_sockaddr_any(&zone->xfrsource4);
isc_sockaddr_any6(&zone->xfrsource6);
isc_sockaddr_any(&zone->altxfrsource4);
isc_sockaddr_any6(&zone->altxfrsource6);
zone->xfr = NULL;
zone->tsigkey = NULL;
zone->maxxfrin = MAX_XFER_TIME;
zone->maxxfrout = MAX_XFER_TIME;
zone->ssutable = NULL;
zone->sigvalidityinterval = 30 * 24 * 3600;
zone->sigresigninginterval = 7 * 24 * 3600;
zone->view = NULL;
zone->acache = NULL;
zone->checkmx = NULL;
zone->checksrv = NULL;
zone->checkns = NULL;
ISC_LINK_INIT(zone, statelink);
zone->statelist = NULL;
zone->stats = NULL;
zone->requeststats_on = ISC_FALSE;
zone->requeststats = NULL;
zone->notifydelay = 5;
zone->isself = NULL;
zone->isselfarg = NULL;
ISC_LIST_INIT(zone->signing);
ISC_LIST_INIT(zone->nsec3chain);
zone->signatures = 10;
zone->nodes = 100;
zone->privatetype = (dns_rdatatype_t)0xffffU;
zone->magic = ZONE_MAGIC;
/* Must be after magic is set. */
result = dns_zone_setdbtype(zone, dbargc_default, dbargv_default);
if (result != ISC_R_SUCCESS)
goto free_erefs;
ISC_EVENT_INIT(&zone->ctlevent, sizeof(zone->ctlevent), 0, NULL,
DNS_EVENT_ZONECONTROL, zone_shutdown, zone, zone,
NULL, NULL);
*zonep = zone;
return (ISC_R_SUCCESS);
free_erefs:
isc_refcount_decrement(&zone->erefs, NULL);
isc_refcount_destroy(&zone->erefs);
free_dblock:
ZONEDB_DESTROYLOCK(&zone->dblock);
free_mutex:
DESTROYLOCK(&zone->lock);
free_zone:
isc_mem_putanddetach(&zone->mctx, zone, sizeof(*zone));
return (result);
}
/*
* Free a zone. Because we require that there be no more
* outstanding events or references, no locking is necessary.
*/
static void
zone_free(dns_zone_t *zone) {
isc_mem_t *mctx = NULL;
dns_signing_t *signing;
dns_nsec3chain_t *nsec3chain;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(isc_refcount_current(&zone->erefs) == 0);
REQUIRE(zone->irefs == 0);
REQUIRE(!LOCKED_ZONE(zone));
REQUIRE(zone->timer == NULL);
/*
* Managed objects. Order is important.
*/
if (zone->request != NULL)
dns_request_destroy(&zone->request); /* XXXMPA */
INSIST(zone->readio == NULL);
INSIST(zone->statelist == NULL);
INSIST(zone->writeio == NULL);
if (zone->task != NULL)
isc_task_detach(&zone->task);
if (zone->zmgr != NULL)
dns_zonemgr_releasezone(zone->zmgr, zone);
/* Unmanaged objects */
for (signing = ISC_LIST_HEAD(zone->signing);
signing != NULL;
signing = ISC_LIST_HEAD(zone->signing)) {
ISC_LIST_UNLINK(zone->signing, signing, link);
dns_db_detach(&signing->db);
dns_dbiterator_destroy(&signing->dbiterator);
isc_mem_put(zone->mctx, signing, sizeof *signing);
}
for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
nsec3chain != NULL;
nsec3chain = ISC_LIST_HEAD(zone->nsec3chain)) {
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, link);
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
}
if (zone->masterfile != NULL)
isc_mem_free(zone->mctx, zone->masterfile);
zone->masterfile = NULL;
if (zone->keydirectory != NULL)
isc_mem_free(zone->mctx, zone->keydirectory);
zone->keydirectory = NULL;
zone->journalsize = -1;
if (zone->journal != NULL)
isc_mem_free(zone->mctx, zone->journal);
zone->journal = NULL;
if (zone->stats != NULL)
isc_stats_detach(&zone->stats);
if (zone->requeststats != NULL)
isc_stats_detach(&zone->requeststats);
if (zone->db != NULL)
zone_detachdb(zone);
if (zone->acache != NULL)
dns_acache_detach(&zone->acache);
zone_freedbargs(zone);
RUNTIME_CHECK(dns_zone_setmasterswithkeys(zone, NULL, NULL, 0)
== ISC_R_SUCCESS);
RUNTIME_CHECK(dns_zone_setalsonotify(zone, NULL, 0)
== ISC_R_SUCCESS);
zone->check_names = dns_severity_ignore;
if (zone->update_acl != NULL)
dns_acl_detach(&zone->update_acl);
if (zone->forward_acl != NULL)
dns_acl_detach(&zone->forward_acl);
if (zone->notify_acl != NULL)
dns_acl_detach(&zone->notify_acl);
if (zone->query_acl != NULL)
dns_acl_detach(&zone->query_acl);
if (zone->queryon_acl != NULL)
dns_acl_detach(&zone->queryon_acl);
if (zone->xfr_acl != NULL)
dns_acl_detach(&zone->xfr_acl);
if (dns_name_dynamic(&zone->origin))
dns_name_free(&zone->origin, zone->mctx);
if (zone->strnamerd != NULL)
isc_mem_free(zone->mctx, zone->strnamerd);
if (zone->strname != NULL)
isc_mem_free(zone->mctx, zone->strname);
if (zone->strrdclass != NULL)
isc_mem_free(zone->mctx, zone->strrdclass);
if (zone->strviewname != NULL)
isc_mem_free(zone->mctx, zone->strviewname);
if (zone->ssutable != NULL)
dns_ssutable_detach(&zone->ssutable);
/* last stuff */
ZONEDB_DESTROYLOCK(&zone->dblock);
DESTROYLOCK(&zone->lock);
isc_refcount_destroy(&zone->erefs);
zone->magic = 0;
mctx = zone->mctx;
isc_mem_put(mctx, zone, sizeof(*zone));
isc_mem_detach(&mctx);
}
/*
* Single shot.
*/
void
dns_zone_setclass(dns_zone_t *zone, dns_rdataclass_t rdclass) {
char namebuf[1024];
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(rdclass != dns_rdataclass_none);
/*
* Test and set.
*/
LOCK_ZONE(zone);
REQUIRE(zone->rdclass == dns_rdataclass_none ||
zone->rdclass == rdclass);
zone->rdclass = rdclass;
if (zone->strnamerd != NULL)
isc_mem_free(zone->mctx, zone->strnamerd);
if (zone->strrdclass != NULL)
isc_mem_free(zone->mctx, zone->strrdclass);
zone_namerd_tostr(zone, namebuf, sizeof namebuf);
zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf);
zone_rdclass_tostr(zone, namebuf, sizeof namebuf);
zone->strrdclass = isc_mem_strdup(zone->mctx, namebuf);
UNLOCK_ZONE(zone);
}
dns_rdataclass_t
dns_zone_getclass(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->rdclass);
}
void
dns_zone_setnotifytype(dns_zone_t *zone, dns_notifytype_t notifytype) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifytype = notifytype;
UNLOCK_ZONE(zone);
}
isc_result_t
dns_zone_getserial2(dns_zone_t *zone, isc_uint32_t *serialp) {
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(serialp != NULL);
LOCK_ZONE(zone);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
result = zone_get_from_db(zone, zone->db, NULL, NULL, serialp,
NULL, NULL, NULL, NULL, NULL);
} else
result = DNS_R_NOTLOADED;
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
return (result);
}
isc_uint32_t
dns_zone_getserial(dns_zone_t *zone) {
isc_result_t result;
isc_uint32_t serial;
result = dns_zone_getserial2(zone, &serial);
if (result != ISC_R_SUCCESS)
serial = 0; /* XXX: not really correct, but no other choice */
return (serial);
}
/*
* Single shot.
*/
void
dns_zone_settype(dns_zone_t *zone, dns_zonetype_t type) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(type != dns_zone_none);
/*
* Test and set.
*/
LOCK_ZONE(zone);
REQUIRE(zone->type == dns_zone_none || zone->type == type);
zone->type = type;
UNLOCK_ZONE(zone);
}
static void
zone_freedbargs(dns_zone_t *zone) {
unsigned int i;
/* Free the old database argument list. */
if (zone->db_argv != NULL) {
for (i = 0; i < zone->db_argc; i++)
isc_mem_free(zone->mctx, zone->db_argv[i]);
isc_mem_put(zone->mctx, zone->db_argv,
zone->db_argc * sizeof(*zone->db_argv));
}
zone->db_argc = 0;
zone->db_argv = NULL;
}
isc_result_t
dns_zone_getdbtype(dns_zone_t *zone, char ***argv, isc_mem_t *mctx) {
size_t size = 0;
unsigned int i;
isc_result_t result = ISC_R_SUCCESS;
void *mem;
char **tmp, *tmp2;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(argv != NULL && *argv == NULL);
LOCK_ZONE(zone);
size = (zone->db_argc + 1) * sizeof(char *);
for (i = 0; i < zone->db_argc; i++)
size += strlen(zone->db_argv[i]) + 1;
mem = isc_mem_allocate(mctx, size);
if (mem != NULL) {
tmp = mem;
tmp2 = mem;
tmp2 += (zone->db_argc + 1) * sizeof(char *);
for (i = 0; i < zone->db_argc; i++) {
*tmp++ = tmp2;
strcpy(tmp2, zone->db_argv[i]);
tmp2 += strlen(tmp2) + 1;
}
*tmp = NULL;
} else
result = ISC_R_NOMEMORY;
UNLOCK_ZONE(zone);
*argv = mem;
return (result);
}
isc_result_t
dns_zone_setdbtype(dns_zone_t *zone,
unsigned int dbargc, const char * const *dbargv) {
isc_result_t result = ISC_R_SUCCESS;
char **new = NULL;
unsigned int i;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(dbargc >= 1);
REQUIRE(dbargv != NULL);
LOCK_ZONE(zone);
/* Set up a new database argument list. */
new = isc_mem_get(zone->mctx, dbargc * sizeof(*new));
if (new == NULL)
goto nomem;
for (i = 0; i < dbargc; i++)
new[i] = NULL;
for (i = 0; i < dbargc; i++) {
new[i] = isc_mem_strdup(zone->mctx, dbargv[i]);
if (new[i] == NULL)
goto nomem;
}
/* Free the old list. */
zone_freedbargs(zone);
zone->db_argc = dbargc;
zone->db_argv = new;
result = ISC_R_SUCCESS;
goto unlock;
nomem:
if (new != NULL) {
for (i = 0; i < dbargc; i++)
if (new[i] != NULL)
isc_mem_free(zone->mctx, new[i]);
isc_mem_put(zone->mctx, new, dbargc * sizeof(*new));
}
result = ISC_R_NOMEMORY;
unlock:
UNLOCK_ZONE(zone);
return (result);
}
void
dns_zone_setview(dns_zone_t *zone, dns_view_t *view) {
char namebuf[1024];
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->view != NULL)
dns_view_weakdetach(&zone->view);
dns_view_weakattach(view, &zone->view);
if (zone->strviewname != NULL)
isc_mem_free(zone->mctx, zone->strviewname);
if (zone->strnamerd != NULL)
isc_mem_free(zone->mctx, zone->strnamerd);
zone_namerd_tostr(zone, namebuf, sizeof namebuf);
zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf);
zone_viewname_tostr(zone, namebuf, sizeof namebuf);
zone->strviewname = isc_mem_strdup(zone->mctx, namebuf);
UNLOCK_ZONE(zone);
}
dns_view_t *
dns_zone_getview(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->view);
}
isc_result_t
dns_zone_setorigin(dns_zone_t *zone, const dns_name_t *origin) {
isc_result_t result;
char namebuf[1024];
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(origin != NULL);
LOCK_ZONE(zone);
if (dns_name_dynamic(&zone->origin)) {
dns_name_free(&zone->origin, zone->mctx);
dns_name_init(&zone->origin, NULL);
}
result = dns_name_dup(origin, zone->mctx, &zone->origin);
if (zone->strnamerd != NULL)
isc_mem_free(zone->mctx, zone->strnamerd);
if (zone->strname != NULL)
isc_mem_free(zone->mctx, zone->strname);
zone_namerd_tostr(zone, namebuf, sizeof namebuf);
zone->strnamerd = isc_mem_strdup(zone->mctx, namebuf);
zone_name_tostr(zone, namebuf, sizeof namebuf);
zone->strname = isc_mem_strdup(zone->mctx, namebuf);
UNLOCK_ZONE(zone);
return (result);
}
void
dns_zone_setacache(dns_zone_t *zone, dns_acache_t *acache) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(acache != NULL);
LOCK_ZONE(zone);
if (zone->acache != NULL)
dns_acache_detach(&zone->acache);
dns_acache_attach(acache, &zone->acache);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
isc_result_t result;
/*
* If the zone reuses an existing DB, the DB needs to be
* set in the acache explicitly. We can safely ignore the
* case where the DB is already set. If other error happens,
* the acache will not work effectively.
*/
result = dns_acache_setdb(acache, zone->db);
if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_acache_setdb() failed: %s",
isc_result_totext(result));
}
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
}
static isc_result_t
dns_zone_setstring(dns_zone_t *zone, char **field, const char *value) {
char *copy;
if (value != NULL) {
copy = isc_mem_strdup(zone->mctx, value);
if (copy == NULL)
return (ISC_R_NOMEMORY);
} else {
copy = NULL;
}
if (*field != NULL)
isc_mem_free(zone->mctx, *field);
*field = copy;
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_setfile(dns_zone_t *zone, const char *file) {
return (dns_zone_setfile2(zone, file, dns_masterformat_text));
}
isc_result_t
dns_zone_setfile2(dns_zone_t *zone, const char *file,
dns_masterformat_t format) {
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
result = dns_zone_setstring(zone, &zone->masterfile, file);
if (result == ISC_R_SUCCESS) {
zone->masterformat = format;
result = default_journal(zone);
}
UNLOCK_ZONE(zone);
return (result);
}
const char *
dns_zone_getfile(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->masterfile);
}
static isc_result_t
default_journal(dns_zone_t *zone) {
isc_result_t result;
char *journal;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
if (zone->masterfile != NULL) {
/* Calculate string length including '\0'. */
int len = strlen(zone->masterfile) + sizeof(".jnl");
journal = isc_mem_allocate(zone->mctx, len);
if (journal == NULL)
return (ISC_R_NOMEMORY);
strcpy(journal, zone->masterfile);
strcat(journal, ".jnl");
} else {
journal = NULL;
}
result = dns_zone_setstring(zone, &zone->journal, journal);
if (journal != NULL)
isc_mem_free(zone->mctx, journal);
return (result);
}
isc_result_t
dns_zone_setjournal(dns_zone_t *zone, const char *journal) {
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
result = dns_zone_setstring(zone, &zone->journal, journal);
UNLOCK_ZONE(zone);
return (result);
}
char *
dns_zone_getjournal(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->journal);
}
/*
* Return true iff the zone is "dynamic", in the sense that the zone's
* master file (if any) is written by the server, rather than being
* updated manually and read by the server.
*
* This is true for slave zones, stub zones, and zones that allow
* dynamic updates either by having an update policy ("ssutable")
* or an "allow-update" ACL with a value other than exactly "{ none; }".
*/
static isc_boolean_t
zone_isdynamic(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (ISC_TF(zone->type == dns_zone_slave ||
zone->type == dns_zone_stub ||
(!zone->update_disabled && zone->ssutable != NULL) ||
(!zone->update_disabled && zone->update_acl != NULL &&
!dns_acl_isnone(zone->update_acl))));
}
static isc_result_t
zone_load(dns_zone_t *zone, unsigned int flags) {
isc_result_t result;
isc_time_t now;
isc_time_t loadtime, filetime;
dns_db_t *db = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
TIME_NOW(&now);
INSIST(zone->type != dns_zone_none);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADING)) {
if ((flags & DNS_ZONELOADFLAG_THAW) != 0)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_THAW);
result = DNS_R_CONTINUE;
goto cleanup;
}
if (zone->db != NULL && zone->masterfile == NULL) {
/*
* The zone has no master file configured, but it already
* has a database. It could be the built-in
* version.bind. CH zone, a zone with a persistent
* database being reloaded, or maybe a zone that
* used to have a master file but whose configuration
* was changed so that it no longer has one. Do nothing.
*/
result = ISC_R_SUCCESS;
goto cleanup;
}
if (zone->db != NULL && zone_isdynamic(zone)) {
/*
* This is a slave, stub, or dynamically updated
* zone being reloaded. Do nothing - the database
* we already have is guaranteed to be up-to-date.
*/
if (zone->type == dns_zone_master)
result = DNS_R_DYNAMIC;
else
result = ISC_R_SUCCESS;
goto cleanup;
}
/*
* Store the current time before the zone is loaded, so that if the
* file changes between the time of the load and the time that
* zone->loadtime is set, then the file will still be reloaded
* the next time dns_zone_load is called.
*/
TIME_NOW(&loadtime);
/*
* Don't do the load if the file that stores the zone is older
* than the last time the zone was loaded. If the zone has not
* been loaded yet, zone->loadtime will be the epoch.
*/
if (zone->masterfile != NULL) {
/*
* The file is already loaded. If we are just doing a
* "rndc reconfig", we are done.
*/
if (!isc_time_isepoch(&zone->loadtime) &&
(flags & DNS_ZONELOADFLAG_NOSTAT) != 0) {
result = ISC_R_SUCCESS;
goto cleanup;
}
result = isc_file_getmodtime(zone->masterfile, &filetime);
if (result == ISC_R_SUCCESS) {
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_HASINCLUDE) &&
isc_time_compare(&filetime, &zone->loadtime) <= 0) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"skipping load: master file "
"older than last load");
result = DNS_R_UPTODATE;
goto cleanup;
}
loadtime = filetime;
}
}
INSIST(zone->db_argc >= 1);
/*
* Built in zones don't need to be reloaded.
*/
if (zone->type == dns_zone_master &&
strcmp(zone->db_argv[0], "_builtin") == 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
result = ISC_R_SUCCESS;
goto cleanup;
}
if ((zone->type == dns_zone_slave || zone->type == dns_zone_stub) &&
(strcmp(zone->db_argv[0], "rbt") == 0 ||
strcmp(zone->db_argv[0], "rbt64") == 0)) {
if (zone->masterfile == NULL ||
!isc_file_exists(zone->masterfile)) {
if (zone->masterfile != NULL) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"no master file");
}
zone->refreshtime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
result = ISC_R_SUCCESS;
goto cleanup;
}
}
dns_zone_log(zone, ISC_LOG_DEBUG(1), "starting load");
result = dns_db_create(zone->mctx, zone->db_argv[0],
&zone->origin, (zone->type == dns_zone_stub) ?
dns_dbtype_stub : dns_dbtype_zone,
zone->rdclass,
zone->db_argc - 1, zone->db_argv + 1,
&db);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"loading zone: creating database: %s",
isc_result_totext(result));
goto cleanup;
}
dns_db_settask(db, zone->task);
if (! dns_db_ispersistent(db)) {
if (zone->masterfile != NULL) {
result = zone_startload(db, zone, loadtime);
} else {
result = DNS_R_NOMASTERFILE;
if (zone->type == dns_zone_master) {
dns_zone_log(zone, ISC_LOG_ERROR,
"loading zone: "
"no master file configured");
goto cleanup;
}
dns_zone_log(zone, ISC_LOG_INFO, "loading zone: "
"no master file configured: continuing");
}
}
if (result == DNS_R_CONTINUE) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADING);
if ((flags & DNS_ZONELOADFLAG_THAW) != 0)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_THAW);
goto cleanup;
}
result = zone_postload(zone, db, loadtime, result);
cleanup:
UNLOCK_ZONE(zone);
if (db != NULL)
dns_db_detach(&db);
return (result);
}
isc_result_t
dns_zone_load(dns_zone_t *zone) {
return (zone_load(zone, 0));
}
isc_result_t
dns_zone_loadnew(dns_zone_t *zone) {
return (zone_load(zone, DNS_ZONELOADFLAG_NOSTAT));
}
isc_result_t
dns_zone_loadandthaw(dns_zone_t *zone) {
isc_result_t result;
result = zone_load(zone, DNS_ZONELOADFLAG_THAW);
switch (result) {
case DNS_R_CONTINUE:
/* Deferred thaw. */
break;
case ISC_R_SUCCESS:
case DNS_R_UPTODATE:
case DNS_R_SEENINCLUDE:
zone->update_disabled = ISC_FALSE;
break;
case DNS_R_NOMASTERFILE:
zone->update_disabled = ISC_FALSE;
break;
default:
/* Error, remain in disabled state. */
break;
}
return (result);
}
static unsigned int
get_master_options(dns_zone_t *zone) {
unsigned int options;
options = DNS_MASTER_ZONE;
if (zone->type == dns_zone_slave)
options |= DNS_MASTER_SLAVE;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNS))
options |= DNS_MASTER_CHECKNS;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_FATALNS))
options |= DNS_MASTER_FATALNS;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMES))
options |= DNS_MASTER_CHECKNAMES;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMESFAIL))
options |= DNS_MASTER_CHECKNAMESFAIL;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMX))
options |= DNS_MASTER_CHECKMX;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKMXFAIL))
options |= DNS_MASTER_CHECKMXFAIL;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKWILDCARD))
options |= DNS_MASTER_CHECKWILDCARD;
if (zone->type == dns_zone_master &&
(zone->update_acl != NULL || zone->ssutable != NULL))
options |= DNS_MASTER_RESIGN;
return (options);
}
static void
zone_gotreadhandle(isc_task_t *task, isc_event_t *event) {
dns_load_t *load = event->ev_arg;
isc_result_t result = ISC_R_SUCCESS;
unsigned int options;
REQUIRE(DNS_LOAD_VALID(load));
if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0)
result = ISC_R_CANCELED;
isc_event_free(&event);
if (result == ISC_R_CANCELED)
goto fail;
options = get_master_options(load->zone);
result = dns_master_loadfileinc3(load->zone->masterfile,
dns_db_origin(load->db),
dns_db_origin(load->db),
load->zone->rdclass,
options,
load->zone->sigresigninginterval,
&load->callbacks, task,
zone_loaddone, load,
&load->zone->lctx, load->zone->mctx,
load->zone->masterformat);
if (result != ISC_R_SUCCESS && result != DNS_R_CONTINUE &&
result != DNS_R_SEENINCLUDE)
goto fail;
return;
fail:
zone_loaddone(load, result);
}
static void
zone_gotwritehandle(isc_task_t *task, isc_event_t *event) {
const char me[] = "zone_gotwritehandle";
dns_zone_t *zone = event->ev_arg;
isc_result_t result = ISC_R_SUCCESS;
dns_dbversion_t *version = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
INSIST(task == zone->task);
ENTER;
if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0)
result = ISC_R_CANCELED;
isc_event_free(&event);
if (result == ISC_R_CANCELED)
goto fail;
LOCK_ZONE(zone);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
dns_db_currentversion(zone->db, &version);
result = dns_master_dumpinc2(zone->mctx, zone->db, version,
&dns_master_style_default,
zone->masterfile, zone->task, dump_done,
zone, &zone->dctx, zone->masterformat);
dns_db_closeversion(zone->db, &version, ISC_FALSE);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
if (result != DNS_R_CONTINUE)
goto fail;
return;
fail:
dump_done(zone, result);
}
static isc_result_t
zone_startload(dns_db_t *db, dns_zone_t *zone, isc_time_t loadtime) {
dns_load_t *load;
isc_result_t result;
isc_result_t tresult;
unsigned int options;
options = get_master_options(zone);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_MANYERRORS))
options |= DNS_MASTER_MANYERRORS;
if (zone->zmgr != NULL && zone->db != NULL && zone->task != NULL) {
load = isc_mem_get(zone->mctx, sizeof(*load));
if (load == NULL)
return (ISC_R_NOMEMORY);
load->mctx = NULL;
load->zone = NULL;
load->db = NULL;
load->loadtime = loadtime;
load->magic = LOAD_MAGIC;
isc_mem_attach(zone->mctx, &load->mctx);
zone_iattach(zone, &load->zone);
dns_db_attach(db, &load->db);
dns_rdatacallbacks_init(&load->callbacks);
result = dns_db_beginload(db, &load->callbacks.add,
&load->callbacks.add_private);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = zonemgr_getio(zone->zmgr, ISC_TRUE, zone->task,
zone_gotreadhandle, load,
&zone->readio);
if (result != ISC_R_SUCCESS) {
/*
* We can't report multiple errors so ignore
* the result of dns_db_endload().
*/
(void)dns_db_endload(load->db,
&load->callbacks.add_private);
goto cleanup;
} else
result = DNS_R_CONTINUE;
} else {
dns_rdatacallbacks_t callbacks;
dns_rdatacallbacks_init(&callbacks);
result = dns_db_beginload(db, &callbacks.add,
&callbacks.add_private);
if (result != ISC_R_SUCCESS)
return (result);
result = dns_master_loadfile3(zone->masterfile, &zone->origin,
&zone->origin, zone->rdclass,
options, zone->sigresigninginterval,
&callbacks, zone->mctx,
zone->masterformat);
tresult = dns_db_endload(db, &callbacks.add_private);
if (result == ISC_R_SUCCESS)
result = tresult;
}
return (result);
cleanup:
load->magic = 0;
dns_db_detach(&load->db);
zone_idetach(&load->zone);
isc_mem_detach(&load->mctx);
isc_mem_put(zone->mctx, load, sizeof(*load));
return (result);
}
static isc_boolean_t
zone_check_mx(dns_zone_t *zone, dns_db_t *db, dns_name_t *name,
dns_name_t *owner)
{
isc_result_t result;
char ownerbuf[DNS_NAME_FORMATSIZE];
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
int level;
/*
* Outside of zone.
*/
if (!dns_name_issubdomain(name, &zone->origin)) {
if (zone->checkmx != NULL)
return ((zone->checkmx)(zone, name, owner));
return (ISC_TRUE);
}
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
dns_fixedname_init(&fixed);
foundname = dns_fixedname_name(&fixed);
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (ISC_TRUE);
if (result == DNS_R_NXRRSET) {
result = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (ISC_TRUE);
}
dns_name_format(owner, ownerbuf, sizeof ownerbuf);
dns_name_format(name, namebuf, sizeof namebuf);
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME) {
dns_zone_log(zone, level,
"%s/MX '%s' has no address records (A or AAAA)",
ownerbuf, namebuf);
/* XXX950 make fatal for 9.5.0. */
return (ISC_TRUE);
}
if (result == DNS_R_CNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNMXCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME))
dns_zone_log(zone, level,
"%s/MX '%s' is a CNAME (illegal)",
ownerbuf, namebuf);
return ((level == ISC_LOG_WARNING) ? ISC_TRUE : ISC_FALSE);
}
if (result == DNS_R_DNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNMXCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNOREMXCNAME)) {
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level, "%s/MX '%s' is below a DNAME"
" '%s' (illegal)", ownerbuf, namebuf,
altbuf);
}
return ((level == ISC_LOG_WARNING) ? ISC_TRUE : ISC_FALSE);
}
if (zone->checkmx != NULL && result == DNS_R_DELEGATION)
return ((zone->checkmx)(zone, name, owner));
return (ISC_TRUE);
}
static isc_boolean_t
zone_check_srv(dns_zone_t *zone, dns_db_t *db, dns_name_t *name,
dns_name_t *owner)
{
isc_result_t result;
char ownerbuf[DNS_NAME_FORMATSIZE];
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
int level;
/*
* "." means the services does not exist.
*/
if (dns_name_equal(name, dns_rootname))
return (ISC_TRUE);
/*
* Outside of zone.
*/
if (!dns_name_issubdomain(name, &zone->origin)) {
if (zone->checksrv != NULL)
return ((zone->checksrv)(zone, name, owner));
return (ISC_TRUE);
}
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
dns_fixedname_init(&fixed);
foundname = dns_fixedname_name(&fixed);
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (ISC_TRUE);
if (result == DNS_R_NXRRSET) {
result = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (ISC_TRUE);
}
dns_name_format(owner, ownerbuf, sizeof ownerbuf);
dns_name_format(name, namebuf, sizeof namebuf);
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME) {
dns_zone_log(zone, level,
"%s/SRV '%s' has no address records (A or AAAA)",
ownerbuf, namebuf);
/* XXX950 make fatal for 9.5.0. */
return (ISC_TRUE);
}
if (result == DNS_R_CNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNSRVCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME))
dns_zone_log(zone, level,
"%s/SRV '%s' is a CNAME (illegal)",
ownerbuf, namebuf);
return ((level == ISC_LOG_WARNING) ? ISC_TRUE : ISC_FALSE);
}
if (result == DNS_R_DNAME) {
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_WARNSRVCNAME) ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME))
level = ISC_LOG_WARNING;
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IGNORESRVCNAME)) {
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level, "%s/SRV '%s' is below a "
"DNAME '%s' (illegal)", ownerbuf, namebuf,
altbuf);
}
return ((level == ISC_LOG_WARNING) ? ISC_TRUE : ISC_FALSE);
}
if (zone->checksrv != NULL && result == DNS_R_DELEGATION)
return ((zone->checksrv)(zone, name, owner));
return (ISC_TRUE);
}
static isc_boolean_t
zone_check_glue(dns_zone_t *zone, dns_db_t *db, dns_name_t *name,
dns_name_t *owner)
{
isc_boolean_t answer = ISC_TRUE;
isc_result_t result, tresult;
char ownerbuf[DNS_NAME_FORMATSIZE];
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
dns_rdataset_t a;
dns_rdataset_t aaaa;
int level;
/*
* Outside of zone.
*/
if (!dns_name_issubdomain(name, &zone->origin)) {
if (zone->checkns != NULL)
return ((zone->checkns)(zone, name, owner, NULL, NULL));
return (ISC_TRUE);
}
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
dns_fixedname_init(&fixed);
foundname = dns_fixedname_name(&fixed);
dns_rdataset_init(&a);
dns_rdataset_init(&aaaa);
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
DNS_DBFIND_GLUEOK, 0, NULL,
foundname, &a, NULL);
if (result == ISC_R_SUCCESS) {
dns_rdataset_disassociate(&a);
return (ISC_TRUE);
} else if (result == DNS_R_DELEGATION)
dns_rdataset_disassociate(&a);
if (result == DNS_R_NXRRSET || result == DNS_R_DELEGATION ||
result == DNS_R_GLUE) {
tresult = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
DNS_DBFIND_GLUEOK, 0, NULL,
foundname, &aaaa, NULL);
if (tresult == ISC_R_SUCCESS) {
dns_rdataset_disassociate(&aaaa);
return (ISC_TRUE);
}
if (tresult == DNS_R_DELEGATION)
dns_rdataset_disassociate(&aaaa);
if (result == DNS_R_GLUE || tresult == DNS_R_GLUE) {
/*
* Check glue against child zone.
*/
if (zone->checkns != NULL)
answer = (zone->checkns)(zone, name, owner,
&a, &aaaa);
if (dns_rdataset_isassociated(&a))
dns_rdataset_disassociate(&a);
if (dns_rdataset_isassociated(&aaaa))
dns_rdataset_disassociate(&aaaa);
return (answer);
}
} else
tresult = result;
dns_name_format(owner, ownerbuf, sizeof ownerbuf);
dns_name_format(name, namebuf, sizeof namebuf);
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME || result == DNS_R_DELEGATION) {
const char *what;
isc_boolean_t required = ISC_FALSE;
if (dns_name_issubdomain(name, owner)) {
what = "REQUIRED GLUE ";
required = ISC_TRUE;
} else if (result == DNS_R_DELEGATION)
what = "SIBLING GLUE ";
else
what = "";
if (result != DNS_R_DELEGATION || required ||
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKSIBLING)) {
dns_zone_log(zone, level, "%s/NS '%s' has no %s"
"address records (A or AAAA)",
ownerbuf, namebuf, what);
/*
* Log missing address record.
*/
if (result == DNS_R_DELEGATION && zone->checkns != NULL)
(void)(zone->checkns)(zone, name, owner,
&a, &aaaa);
/* XXX950 make fatal for 9.5.0. */
/* answer = ISC_FALSE; */
}
} else if (result == DNS_R_CNAME) {
dns_zone_log(zone, level, "%s/NS '%s' is a CNAME (illegal)",
ownerbuf, namebuf);
/* XXX950 make fatal for 9.5.0. */
/* answer = ISC_FALSE; */
} else if (result == DNS_R_DNAME) {
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level,
"%s/NS '%s' is below a DNAME '%s' (illegal)",
ownerbuf, namebuf, altbuf);
/* XXX950 make fatal for 9.5.0. */
/* answer = ISC_FALSE; */
}
if (dns_rdataset_isassociated(&a))
dns_rdataset_disassociate(&a);
if (dns_rdataset_isassociated(&aaaa))
dns_rdataset_disassociate(&aaaa);
return (answer);
}
static isc_boolean_t
integrity_checks(dns_zone_t *zone, dns_db_t *db) {
dns_dbiterator_t *dbiterator = NULL;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_fixedname_t fixed;
dns_fixedname_t fixedbottom;
dns_rdata_mx_t mx;
dns_rdata_ns_t ns;
dns_rdata_in_srv_t srv;
dns_rdata_t rdata;
dns_name_t *name;
dns_name_t *bottom;
isc_result_t result;
isc_boolean_t ok = ISC_TRUE;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
dns_fixedname_init(&fixedbottom);
bottom = dns_fixedname_name(&fixedbottom);
dns_rdataset_init(&rdataset);
dns_rdata_init(&rdata);
result = dns_db_createiterator(db, 0, &dbiterator);
if (result != ISC_R_SUCCESS)
return (ISC_TRUE);
result = dns_dbiterator_first(dbiterator);
while (result == ISC_R_SUCCESS) {
result = dns_dbiterator_current(dbiterator, &node, name);
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* Is this name visible in the zone?
*/
if (!dns_name_issubdomain(name, &zone->origin) ||
(dns_name_countlabels(bottom) > 0 &&
dns_name_issubdomain(name, bottom)))
goto next;
/*
* Don't check the NS records at the origin.
*/
if (dns_name_equal(name, &zone->origin))
goto checkmx;
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_ns,
0, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto checkmx;
/*
* Remember bottom of zone.
*/
dns_name_copy(name, bottom, NULL);
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (!zone_check_glue(zone, db, &ns.name, name))
ok = ISC_FALSE;
dns_rdata_reset(&rdata);
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
checkmx:
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_mx,
0, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto checksrv;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &mx, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (!zone_check_mx(zone, db, &mx.mx, name))
ok = ISC_FALSE;
dns_rdata_reset(&rdata);
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
checksrv:
if (zone->rdclass != dns_rdataclass_in)
goto next;
result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_srv,
0, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto next;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &srv, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (!zone_check_srv(zone, db, &srv.target, name))
ok = ISC_FALSE;
dns_rdata_reset(&rdata);
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
next:
dns_db_detachnode(db, &node);
result = dns_dbiterator_next(dbiterator);
}
cleanup:
if (node != NULL)
dns_db_detachnode(db, &node);
dns_dbiterator_destroy(&dbiterator);
return (ok);
}
/*
* OpenSSL verification of RSA keys with exponent 3 is known to be
* broken prior OpenSSL 0.9.8c/0.9.7k. Look for such keys and warn
* if they are in use.
*/
static void
zone_check_dnskeys(dns_zone_t *zone, dns_db_t *db) {
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdata_dnskey_t dnskey;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t rdataset;
isc_result_t result;
isc_boolean_t logit, foundrsa = ISC_FALSE, foundmd5 = ISC_FALSE;
const char *algorithm;
result = dns_db_findnode(db, &zone->origin, ISC_FALSE, &node);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_db_currentversion(db, &version);
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_dnskey,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup;
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &dnskey, NULL);
INSIST(result == ISC_R_SUCCESS);
if ((dnskey.algorithm == DST_ALG_RSASHA1 ||
dnskey.algorithm == DST_ALG_RSAMD5) &&
dnskey.datalen > 1 && dnskey.data[0] == 1 &&
dnskey.data[1] == 3)
{
if (dnskey.algorithm == DST_ALG_RSASHA1) {
logit = !foundrsa;
foundrsa = ISC_TRUE;
algorithm = "RSASHA1";
} else {
logit = !foundmd5;
foundmd5 = ISC_TRUE;
algorithm = "RSAMD5";
}
if (logit)
dns_zone_log(zone, ISC_LOG_WARNING,
"weak %s (%u) key found "
"(exponent=3)", algorithm,
dnskey.algorithm);
if (foundrsa && foundmd5)
break;
}
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
cleanup:
if (node != NULL)
dns_db_detachnode(db, &node);
if (version != NULL)
dns_db_closeversion(db, &version, ISC_FALSE);
}
static void
resume_signingwithkey(dns_zone_t *zone) {
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t rdataset;
isc_result_t result;
result = dns_db_findnode(zone->db, &zone->origin, ISC_FALSE, &node);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_db_currentversion(zone->db, &version);
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(zone->db, node, version,
zone->privatetype,
dns_rdatatype_none, 0,
&rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup;
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdataset_current(&rdataset, &rdata);
if (rdata.length != 5 || rdata.data[4] != 0) {
dns_rdata_reset(&rdata);
continue;
}
result = zone_signwithkey(zone, rdata.data[0],
(rdata.data[1] << 8) | rdata.data[2],
ISC_TF(rdata.data[3]));
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_signwithkey failed: %s",
dns_result_totext(result));
}
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
cleanup:
if (node != NULL)
dns_db_detachnode(zone->db, &node);
if (version != NULL)
dns_db_closeversion(zone->db, &version, ISC_FALSE);
}
static isc_result_t
zone_addnsec3chain(dns_zone_t *zone, dns_rdata_nsec3param_t *nsec3param) {
dns_nsec3chain_t *nsec3chain, *current;
isc_result_t result;
isc_time_t now;
unsigned int options = 0;
nsec3chain = isc_mem_get(zone->mctx, sizeof *nsec3chain);
if (nsec3chain == NULL)
return (ISC_R_NOMEMORY);
nsec3chain->magic = 0;
nsec3chain->done = ISC_FALSE;
nsec3chain->db = NULL;
nsec3chain->dbiterator = NULL;
nsec3chain->nsec3param.common.rdclass = nsec3param->common.rdclass;
nsec3chain->nsec3param.common.rdtype = nsec3param->common.rdtype;
nsec3chain->nsec3param.hash = nsec3param->hash;
nsec3chain->nsec3param.iterations = nsec3param->iterations;
nsec3chain->nsec3param.flags = nsec3param->flags;
nsec3chain->nsec3param.salt_length = nsec3param->salt_length;
memcpy(nsec3chain->salt, nsec3param->salt, nsec3param->salt_length);
nsec3chain->nsec3param.salt = nsec3chain->salt;
nsec3chain->seen_nsec = ISC_FALSE;
nsec3chain->delete_nsec = ISC_FALSE;
nsec3chain->save_delete_nsec = ISC_FALSE;
for (current = ISC_LIST_HEAD(zone->nsec3chain);
current != NULL;
current = ISC_LIST_NEXT(current, link)) {
if (current->db == zone->db &&
current->nsec3param.hash == nsec3param->hash &&
current->nsec3param.iterations == nsec3param->iterations &&
current->nsec3param.salt_length == nsec3param->salt_length
&& !memcmp(current->nsec3param.salt, nsec3param->salt,
nsec3param->salt_length))
current->done = ISC_TRUE;
}
if (zone->db != NULL) {
dns_db_attach(zone->db, &nsec3chain->db);
if ((nsec3chain->nsec3param.flags & DNS_NSEC3FLAG_CREATE) != 0)
options = DNS_DB_NONSEC3;
result = dns_db_createiterator(nsec3chain->db, options,
&nsec3chain->dbiterator);
if (result == ISC_R_SUCCESS)
dns_dbiterator_first(nsec3chain->dbiterator);
if (result == ISC_R_SUCCESS) {
dns_dbiterator_pause(nsec3chain->dbiterator);
ISC_LIST_INITANDAPPEND(zone->nsec3chain,
nsec3chain, link);
nsec3chain = NULL;
if (isc_time_isepoch(&zone->nsec3chaintime)) {
TIME_NOW(&now);
zone->nsec3chaintime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
}
}
} else
result = ISC_R_NOTFOUND;
if (nsec3chain != NULL) {
if (nsec3chain->db != NULL)
dns_db_detach(&nsec3chain->db);
if (nsec3chain->dbiterator != NULL)
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
}
return (result);
}
static void
resume_addnsec3chain(dns_zone_t *zone) {
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t rdataset;
isc_result_t result;
dns_rdata_nsec3param_t nsec3param;
result = dns_db_findnode(zone->db, &zone->origin, ISC_FALSE, &node);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_db_currentversion(zone->db, &version);
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(zone->db, node, version,
dns_rdatatype_nsec3param,
dns_rdatatype_none, 0,
&rdataset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup;
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &nsec3param, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if ((nsec3param.flags & DNS_NSEC3FLAG_CREATE) != 0 ||
(nsec3param.flags & DNS_NSEC3FLAG_REMOVE) != 0) {
result = zone_addnsec3chain(zone, &nsec3param);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_addnsec3chain failed: %s",
dns_result_totext(result));
}
}
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
cleanup:
if (node != NULL)
dns_db_detachnode(zone->db, &node);
if (version != NULL)
dns_db_closeversion(zone->db, &version, ISC_FALSE);
}
static void
set_resigntime(dns_zone_t *zone) {
dns_rdataset_t rdataset;
dns_fixedname_t fixed;
unsigned int resign;
isc_result_t result;
isc_uint32_t nanosecs;
dns_rdataset_init(&rdataset);
dns_fixedname_init(&fixed);
result = dns_db_getsigningtime(zone->db, &rdataset,
dns_fixedname_name(&fixed));
if (result != ISC_R_SUCCESS) {
isc_time_settoepoch(&zone->resigntime);
return;
}
resign = rdataset.resign;
dns_rdataset_disassociate(&rdataset);
isc_random_get(&nanosecs);
nanosecs %= 1000000000;
isc_time_set(&zone->resigntime, resign, nanosecs);
}
static isc_result_t
check_nsec3param(dns_zone_t *zone, dns_db_t *db) {
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_dbversion_t *version = NULL;
dns_rdata_nsec3param_t nsec3param;
isc_boolean_t ok = ISC_FALSE;
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_boolean_t dynamic = (zone->type == dns_zone_master) ?
zone_isdynamic(zone) : ISC_FALSE;
dns_rdataset_init(&rdataset);
result = dns_db_findnode(db, &zone->origin, ISC_FALSE, &node);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"nsec3param lookup failure: %s",
dns_result_totext(result));
return (result);
}
dns_db_currentversion(db, &version);
result = dns_db_findrdataset(db, node, version,
dns_rdatatype_nsec3param,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
goto cleanup;
}
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"nsec3param lookup failure: %s",
dns_result_totext(result));
goto cleanup;
}
/*
* For dynamic zones we must support every algorithm so we can
* regenerate all the NSEC3 chains.
* For non-dynamic zones we only need to find a supported algorithm.
*/
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset))
{
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &nsec3param, NULL);
dns_rdata_reset(&rdata);
INSIST(result == ISC_R_SUCCESS);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NSEC3TESTZONE) &&
nsec3param.hash == DNS_NSEC3_UNKNOWNALG && !dynamic)
{
dns_zone_log(zone, ISC_LOG_WARNING,
"nsec3 test \"unknown\" hash algorithm found: %u",
nsec3param.hash);
ok = ISC_TRUE;
} else if (!dns_nsec3_supportedhash(nsec3param.hash)) {
if (dynamic) {
dns_zone_log(zone, ISC_LOG_ERROR,
"unsupported nsec3 hash algorithm"
" in dynamic zone: %u",
nsec3param.hash);
result = DNS_R_BADZONE;
/* Stop second error message. */
ok = ISC_TRUE;
break;
} else
dns_zone_log(zone, ISC_LOG_WARNING,
"unsupported nsec3 hash algorithm: %u",
nsec3param.hash);
} else
ok = ISC_TRUE;
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
if (!ok) {
result = DNS_R_BADZONE;
dns_zone_log(zone, ISC_LOG_ERROR,
"no supported nsec3 hash algorithm");
}
cleanup:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
dns_db_closeversion(db, &version, ISC_FALSE);
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
zone_postload(dns_zone_t *zone, dns_db_t *db, isc_time_t loadtime,
isc_result_t result)
{
unsigned int soacount = 0;
unsigned int nscount = 0;
unsigned int errors = 0;
isc_uint32_t serial, oldserial, refresh, retry, expire, minimum;
isc_time_t now;
isc_boolean_t needdump = ISC_FALSE;
isc_boolean_t hasinclude = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_HASINCLUDE);
unsigned int options;
TIME_NOW(&now);
/*
* Initiate zone transfer? We may need a error code that
* indicates that the "permanent" form does not exist.
* XXX better error feedback to log.
*/
if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE) {
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_stub) {
if (result == ISC_R_FILENOTFOUND)
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"no master file");
else if (result != DNS_R_NOMASTERFILE)
dns_zone_log(zone, ISC_LOG_ERROR,
"loading from master file %s "
"failed: %s",
zone->masterfile,
dns_result_totext(result));
} else
dns_zone_log(zone, ISC_LOG_ERROR,
"loading from master file %s failed: %s",
zone->masterfile,
dns_result_totext(result));
goto cleanup;
}
dns_zone_log(zone, ISC_LOG_DEBUG(2),
"number of nodes in database: %u",
dns_db_nodecount(db));
if (result == DNS_R_SEENINCLUDE)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HASINCLUDE);
else
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HASINCLUDE);
/*
* Apply update log, if any, on initial load.
*/
if (zone->journal != NULL &&
! DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOMERGE) &&
! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED))
{
if (zone->type == dns_zone_master &&
(zone->update_acl != NULL || zone->ssutable != NULL))
options = DNS_JOURNALOPT_RESIGN;
else
options = 0;
result = dns_journal_rollforward2(zone->mctx, db, options,
zone->sigresigninginterval,
zone->journal);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND &&
result != DNS_R_UPTODATE && result != DNS_R_NOJOURNAL &&
result != ISC_R_RANGE) {
dns_zone_log(zone, ISC_LOG_ERROR,
"journal rollforward failed: %s",
dns_result_totext(result));
goto cleanup;
}
if (result == ISC_R_NOTFOUND || result == ISC_R_RANGE) {
dns_zone_log(zone, ISC_LOG_ERROR,
"journal rollforward failed: "
"journal out of sync with zone");
goto cleanup;
}
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"journal rollforward completed "
"successfully: %s",
dns_result_totext(result));
if (result == ISC_R_SUCCESS)
needdump = ISC_TRUE;
}
zone->loadtime = loadtime;
dns_zone_log(zone, ISC_LOG_DEBUG(1), "loaded");
/*
* Obtain ns, soa and cname counts for top of zone.
*/
INSIST(db != NULL);
result = zone_get_from_db(zone, db, &nscount, &soacount, &serial,
&refresh, &retry, &expire, &minimum,
&errors);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"could not find NS and/or SOA records");
}
/*
* Master / Slave / Stub zones require both NS and SOA records at
* the top of the zone.
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
case dns_zone_stub:
if (soacount != 1) {
dns_zone_log(zone, ISC_LOG_ERROR,
"has %d SOA records", soacount);
result = DNS_R_BADZONE;
}
if (nscount == 0) {
dns_zone_log(zone, ISC_LOG_ERROR,
"has no NS records");
result = DNS_R_BADZONE;
}
if (result != ISC_R_SUCCESS)
goto cleanup;
if (zone->type == dns_zone_master && errors != 0) {
result = DNS_R_BADZONE;
goto cleanup;
}
if (zone->type != dns_zone_stub) {
result = check_nsec3param(zone, db);
if (result != ISC_R_SUCCESS)
goto cleanup;
}
if (zone->type == dns_zone_master &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKINTEGRITY) &&
!integrity_checks(zone, db)) {
result = DNS_R_BADZONE;
goto cleanup;
}
if (zone->db != NULL) {
/*
* This is checked in zone_replacedb() for slave zones
* as they don't reload from disk.
*/
result = zone_get_from_db(zone, zone->db, NULL, NULL,
&oldserial, NULL, NULL, NULL,
NULL, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS) &&
!isc_serial_gt(serial, oldserial)) {
isc_uint32_t serialmin, serialmax;
INSIST(zone->type == dns_zone_master);
serialmin = (oldserial + 1) & 0xffffffffU;
serialmax = (oldserial + 0x7fffffffU) &
0xffffffffU;
dns_zone_log(zone, ISC_LOG_ERROR,
"ixfr-from-differences: "
"new serial (%u) out of range "
"[%u - %u]", serial, serialmin,
serialmax);
result = DNS_R_BADZONE;
goto cleanup;
} else if (!isc_serial_ge(serial, oldserial))
dns_zone_log(zone, ISC_LOG_ERROR,
"zone serial has gone backwards");
else if (serial == oldserial && !hasinclude)
dns_zone_log(zone, ISC_LOG_ERROR,
"zone serial unchanged. "
"zone may fail to transfer "
"to slaves.");
}
if (zone->type == dns_zone_master &&
(zone->update_acl != NULL || zone->ssutable != NULL) &&
zone->sigresigninginterval < (3 * refresh) &&
dns_db_issecure(db))
{
dns_zone_log(zone, ISC_LOG_WARNING,
"sig-re-signing-interval less than "
"3 * refresh.");
}
zone->refresh = RANGE(refresh,
zone->minrefresh, zone->maxrefresh);
zone->retry = RANGE(retry,
zone->minretry, zone->maxretry);
zone->expire = RANGE(expire, zone->refresh + zone->retry,
DNS_MAX_EXPIRE);
zone->minimum = minimum;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_stub) {
isc_time_t t;
isc_uint32_t delay;
result = isc_file_getmodtime(zone->journal, &t);
if (result != ISC_R_SUCCESS)
result = isc_file_getmodtime(zone->masterfile,
&t);
if (result == ISC_R_SUCCESS)
DNS_ZONE_TIME_ADD(&t, zone->expire,
&zone->expiretime);
else
DNS_ZONE_TIME_ADD(&now, zone->retry,
&zone->expiretime);
delay = isc_random_jitter(zone->retry,
(zone->retry * 3) / 4);
DNS_ZONE_TIME_ADD(&now, delay, &zone->refreshtime);
if (isc_time_compare(&zone->refreshtime,
&zone->expiretime) >= 0)
zone->refreshtime = now;
}
break;
default:
UNEXPECTED_ERROR(__FILE__, __LINE__,
"unexpected zone type %d", zone->type);
result = ISC_R_UNEXPECTED;
goto cleanup;
}
/*
* Check for weak DNSKEY's.
*/
if (zone->type == dns_zone_master)
zone_check_dnskeys(zone, db);
#if 0
/* destroy notification example. */
{
isc_event_t *e = isc_event_allocate(zone->mctx, NULL,
DNS_EVENT_DBDESTROYED,
dns_zonemgr_dbdestroyed,
zone,
sizeof(isc_event_t));
dns_db_ondestroy(db, zone->task, &e);
}
#endif
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
if (zone->db != NULL) {
result = zone_replacedb(zone, db, ISC_FALSE);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
if (result != ISC_R_SUCCESS)
goto cleanup;
} else {
zone_attachdb(zone, db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
DNS_ZONE_SETFLAG(zone,
DNS_ZONEFLG_LOADED|DNS_ZONEFLG_NEEDNOTIFY);
}
result = ISC_R_SUCCESS;
if (needdump)
zone_needdump(zone, DNS_DUMP_DELAY);
if (zone->task != NULL) {
if (zone->type == dns_zone_master) {
set_resigntime(zone);
resume_signingwithkey(zone);
resume_addnsec3chain(zone);
}
zone_settimer(zone, &now);
}
if (! dns_db_ispersistent(db))
dns_zone_log(zone, ISC_LOG_INFO, "loaded serial %u%s", serial,
dns_db_issecure(db) ? " (signed)" : "");
return (result);
cleanup:
if (zone->type == dns_zone_slave ||
zone->type == dns_zone_stub) {
if (zone->journal != NULL)
zone_saveunique(zone, zone->journal, "jn-XXXXXXXX");
if (zone->masterfile != NULL)
zone_saveunique(zone, zone->masterfile, "db-XXXXXXXX");
/* Mark the zone for immediate refresh. */
zone->refreshtime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
result = ISC_R_SUCCESS;
} else if (zone->type == dns_zone_master)
dns_zone_log(zone, ISC_LOG_ERROR, "not loaded due to errors.");
return (result);
}
static isc_boolean_t
exit_check(dns_zone_t *zone) {
REQUIRE(LOCKED_ZONE(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SHUTDOWN) &&
zone->irefs == 0)
{
/*
* DNS_ZONEFLG_SHUTDOWN can only be set if erefs == 0.
*/
INSIST(isc_refcount_current(&zone->erefs) == 0);
return (ISC_TRUE);
}
return (ISC_FALSE);
}
static isc_boolean_t
zone_check_ns(dns_zone_t *zone, dns_db_t *db, dns_name_t *name) {
isc_result_t result;
char namebuf[DNS_NAME_FORMATSIZE];
char altbuf[DNS_NAME_FORMATSIZE];
dns_fixedname_t fixed;
dns_name_t *foundname;
int level;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOCHECKNS))
return (ISC_TRUE);
if (zone->type == dns_zone_master)
level = ISC_LOG_ERROR;
else
level = ISC_LOG_WARNING;
dns_fixedname_init(&fixed);
foundname = dns_fixedname_name(&fixed);
result = dns_db_find(db, name, NULL, dns_rdatatype_a,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (ISC_TRUE);
if (result == DNS_R_NXRRSET) {
result = dns_db_find(db, name, NULL, dns_rdatatype_aaaa,
0, 0, NULL, foundname, NULL, NULL);
if (result == ISC_R_SUCCESS)
return (ISC_TRUE);
}
dns_name_format(name, namebuf, sizeof namebuf);
if (result == DNS_R_NXRRSET || result == DNS_R_NXDOMAIN ||
result == DNS_R_EMPTYNAME) {
dns_zone_log(zone, level,
"NS '%s' has no address records (A or AAAA)",
namebuf);
/* XXX950 Make fatal ISC_FALSE for 9.5.0. */
return (ISC_TRUE);
}
if (result == DNS_R_CNAME) {
dns_zone_log(zone, level, "NS '%s' is a CNAME (illegal)",
namebuf);
/* XXX950 Make fatal ISC_FALSE for 9.5.0. */
return (ISC_TRUE);
}
if (result == DNS_R_DNAME) {
dns_name_format(foundname, altbuf, sizeof altbuf);
dns_zone_log(zone, level,
"NS '%s' is below a DNAME '%s' (illegal)",
namebuf, altbuf);
/* XXX950 Make fatal ISC_FALSE for 9.5.0. */
return (ISC_TRUE);
}
return (ISC_TRUE);
}
static isc_result_t
zone_count_ns_rr(dns_zone_t *zone, dns_db_t *db, dns_dbnode_t *node,
dns_dbversion_t *version, unsigned int *nscount,
unsigned int *errors)
{
isc_result_t result;
unsigned int count = 0;
unsigned int ecount = 0;
dns_rdataset_t rdataset;
dns_rdata_t rdata;
dns_rdata_ns_t ns;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_ns,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
goto success;
if (result != ISC_R_SUCCESS)
goto invalidate_rdataset;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
if (errors != NULL && zone->rdclass == dns_rdataclass_in &&
(zone->type == dns_zone_master ||
zone->type == dns_zone_slave)) {
dns_rdata_init(&rdata);
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (dns_name_issubdomain(&ns.name, &zone->origin) &&
!zone_check_ns(zone, db, &ns.name))
ecount++;
}
count++;
result = dns_rdataset_next(&rdataset);
}
dns_rdataset_disassociate(&rdataset);
success:
if (nscount != NULL)
*nscount = count;
if (errors != NULL)
*errors = ecount;
result = ISC_R_SUCCESS;
invalidate_rdataset:
dns_rdataset_invalidate(&rdataset);
return (result);
}
static isc_result_t
zone_load_soa_rr(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
unsigned int *soacount,
isc_uint32_t *serial, isc_uint32_t *refresh,
isc_uint32_t *retry, isc_uint32_t *expire,
isc_uint32_t *minimum)
{
isc_result_t result;
unsigned int count;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_soa_t soa;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_soa,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
if (soacount != NULL)
*soacount = 0;
if (serial != NULL)
*serial = 0;
if (refresh != NULL)
*refresh = 0;
if (retry != NULL)
*retry = 0;
if (expire != NULL)
*expire = 0;
if (minimum != NULL)
*minimum = 0;
result = ISC_R_SUCCESS;
goto invalidate_rdataset;
}
if (result != ISC_R_SUCCESS)
goto invalidate_rdataset;
count = 0;
result = dns_rdataset_first(&rdataset);
while (result == ISC_R_SUCCESS) {
dns_rdata_init(&rdata);
dns_rdataset_current(&rdataset, &rdata);
count++;
if (count == 1) {
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
}
result = dns_rdataset_next(&rdataset);
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
if (soacount != NULL)
*soacount = count;
if (count > 0) {
if (serial != NULL)
*serial = soa.serial;
if (refresh != NULL)
*refresh = soa.refresh;
if (retry != NULL)
*retry = soa.retry;
if (expire != NULL)
*expire = soa.expire;
if (minimum != NULL)
*minimum = soa.minimum;
}
result = ISC_R_SUCCESS;
invalidate_rdataset:
dns_rdataset_invalidate(&rdataset);
return (result);
}
/*
* zone must be locked.
*/
static isc_result_t
zone_get_from_db(dns_zone_t *zone, dns_db_t *db, unsigned int *nscount,
unsigned int *soacount, isc_uint32_t *serial,
isc_uint32_t *refresh, isc_uint32_t *retry,
isc_uint32_t *expire, isc_uint32_t *minimum,
unsigned int *errors)
{
dns_dbversion_t *version;
isc_result_t result;
isc_result_t answer = ISC_R_SUCCESS;
dns_dbnode_t *node;
REQUIRE(db != NULL);
REQUIRE(zone != NULL);
version = NULL;
dns_db_currentversion(db, &version);
node = NULL;
result = dns_db_findnode(db, &zone->origin, ISC_FALSE, &node);
if (result != ISC_R_SUCCESS) {
answer = result;
goto closeversion;
}
if (nscount != NULL || errors != NULL) {
result = zone_count_ns_rr(zone, db, node, version,
nscount, errors);
if (result != ISC_R_SUCCESS)
answer = result;
}
if (soacount != NULL || serial != NULL || refresh != NULL
|| retry != NULL || expire != NULL || minimum != NULL) {
result = zone_load_soa_rr(db, node, version, soacount,
serial, refresh, retry, expire,
minimum);
if (result != ISC_R_SUCCESS)
answer = result;
}
dns_db_detachnode(db, &node);
closeversion:
dns_db_closeversion(db, &version, ISC_FALSE);
return (answer);
}
void
dns_zone_attach(dns_zone_t *source, dns_zone_t **target) {
REQUIRE(DNS_ZONE_VALID(source));
REQUIRE(target != NULL && *target == NULL);
isc_refcount_increment(&source->erefs, NULL);
*target = source;
}
void
dns_zone_detach(dns_zone_t **zonep) {
dns_zone_t *zone;
unsigned int refs;
isc_boolean_t free_now = ISC_FALSE;
REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep));
zone = *zonep;
isc_refcount_decrement(&zone->erefs, &refs);
if (refs == 0) {
LOCK_ZONE(zone);
/*
* We just detached the last external reference.
*/
if (zone->task != NULL) {
/*
* This zone is being managed. Post
* its control event and let it clean
* up synchronously in the context of
* its task.
*/
isc_event_t *ev = &zone->ctlevent;
isc_task_send(zone->task, &ev);
} else {
/*
* This zone is not being managed; it has
* no task and can have no outstanding
* events. Free it immediately.
*/
/*
* Unmanaged zones should not have non-null views;
* we have no way of detaching from the view here
* without causing deadlock because this code is called
* with the view already locked.
*/
INSIST(zone->view == NULL);
free_now = ISC_TRUE;
}
UNLOCK_ZONE(zone);
}
*zonep = NULL;
if (free_now)
zone_free(zone);
}
void
dns_zone_iattach(dns_zone_t *source, dns_zone_t **target) {
REQUIRE(DNS_ZONE_VALID(source));
REQUIRE(target != NULL && *target == NULL);
LOCK_ZONE(source);
zone_iattach(source, target);
UNLOCK_ZONE(source);
}
static void
zone_iattach(dns_zone_t *source, dns_zone_t **target) {
/*
* 'source' locked by caller.
*/
REQUIRE(LOCKED_ZONE(source));
REQUIRE(DNS_ZONE_VALID(source));
REQUIRE(target != NULL && *target == NULL);
INSIST(source->irefs + isc_refcount_current(&source->erefs) > 0);
source->irefs++;
INSIST(source->irefs != 0);
*target = source;
}
static void
zone_idetach(dns_zone_t **zonep) {
dns_zone_t *zone;
/*
* 'zone' locked by caller.
*/
REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep));
zone = *zonep;
REQUIRE(LOCKED_ZONE(*zonep));
*zonep = NULL;
INSIST(zone->irefs > 0);
zone->irefs--;
INSIST(zone->irefs + isc_refcount_current(&zone->erefs) > 0);
}
void
dns_zone_idetach(dns_zone_t **zonep) {
dns_zone_t *zone;
isc_boolean_t free_needed;
REQUIRE(zonep != NULL && DNS_ZONE_VALID(*zonep));
zone = *zonep;
*zonep = NULL;
LOCK_ZONE(zone);
INSIST(zone->irefs > 0);
zone->irefs--;
free_needed = exit_check(zone);
UNLOCK_ZONE(zone);
if (free_needed)
zone_free(zone);
}
isc_mem_t *
dns_zone_getmctx(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->mctx);
}
dns_zonemgr_t *
dns_zone_getmgr(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->zmgr);
}
void
dns_zone_setflag(dns_zone_t *zone, unsigned int flags, isc_boolean_t value) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (value)
DNS_ZONE_SETFLAG(zone, flags);
else
DNS_ZONE_CLRFLAG(zone, flags);
UNLOCK_ZONE(zone);
}
void
dns_zone_setoption(dns_zone_t *zone, unsigned int option, isc_boolean_t value)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (value)
zone->options |= option;
else
zone->options &= ~option;
UNLOCK_ZONE(zone);
}
unsigned int
dns_zone_getoptions(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->options);
}
isc_result_t
dns_zone_setxfrsource4(dns_zone_t *zone, const isc_sockaddr_t *xfrsource) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->xfrsource4 = *xfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getxfrsource4(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->xfrsource4);
}
isc_result_t
dns_zone_setxfrsource6(dns_zone_t *zone, const isc_sockaddr_t *xfrsource) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->xfrsource6 = *xfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getxfrsource6(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->xfrsource6);
}
isc_result_t
dns_zone_setaltxfrsource4(dns_zone_t *zone,
const isc_sockaddr_t *altxfrsource)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->altxfrsource4 = *altxfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getaltxfrsource4(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->altxfrsource4);
}
isc_result_t
dns_zone_setaltxfrsource6(dns_zone_t *zone,
const isc_sockaddr_t *altxfrsource)
{
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->altxfrsource6 = *altxfrsource;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getaltxfrsource6(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->altxfrsource6);
}
isc_result_t
dns_zone_setnotifysrc4(dns_zone_t *zone, const isc_sockaddr_t *notifysrc) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifysrc4 = *notifysrc;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getnotifysrc4(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->notifysrc4);
}
isc_result_t
dns_zone_setnotifysrc6(dns_zone_t *zone, const isc_sockaddr_t *notifysrc) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifysrc6 = *notifysrc;
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_sockaddr_t *
dns_zone_getnotifysrc6(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->notifysrc6);
}
isc_result_t
dns_zone_setalsonotify(dns_zone_t *zone, const isc_sockaddr_t *notify,
isc_uint32_t count)
{
isc_sockaddr_t *new;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(count == 0 || notify != NULL);
LOCK_ZONE(zone);
if (zone->notify != NULL) {
isc_mem_put(zone->mctx, zone->notify,
zone->notifycnt * sizeof(*new));
zone->notify = NULL;
zone->notifycnt = 0;
}
if (count != 0) {
new = isc_mem_get(zone->mctx, count * sizeof(*new));
if (new == NULL) {
UNLOCK_ZONE(zone);
return (ISC_R_NOMEMORY);
}
memcpy(new, notify, count * sizeof(*new));
zone->notify = new;
zone->notifycnt = count;
}
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_setmasters(dns_zone_t *zone, const isc_sockaddr_t *masters,
isc_uint32_t count)
{
isc_result_t result;
result = dns_zone_setmasterswithkeys(zone, masters, NULL, count);
return (result);
}
static isc_boolean_t
same_masters(const isc_sockaddr_t *old, const isc_sockaddr_t *new,
isc_uint32_t count)
{
unsigned int i;
for (i = 0; i < count; i++)
if (!isc_sockaddr_equal(&old[i], &new[i]))
return (ISC_FALSE);
return (ISC_TRUE);
}
static isc_boolean_t
same_keynames(dns_name_t **old, dns_name_t **new, isc_uint32_t count) {
unsigned int i;
if (old == NULL && new == NULL)
return (ISC_TRUE);
if (old == NULL || new == NULL)
return (ISC_FALSE);
for (i = 0; i < count; i++) {
if (old[i] == NULL && new[i] == NULL)
continue;
if (old[i] == NULL || new[i] == NULL ||
!dns_name_equal(old[i], new[i]))
return (ISC_FALSE);
}
return (ISC_TRUE);
}
isc_result_t
dns_zone_setmasterswithkeys(dns_zone_t *zone,
const isc_sockaddr_t *masters,
dns_name_t **keynames,
isc_uint32_t count)
{
isc_sockaddr_t *new;
isc_result_t result = ISC_R_SUCCESS;
dns_name_t **newname;
isc_boolean_t *newok;
unsigned int i;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(count == 0 || masters != NULL);
if (keynames != NULL) {
REQUIRE(count != 0);
}
LOCK_ZONE(zone);
/*
* The refresh code assumes that 'masters' wouldn't change under it.
* If it will change then kill off any current refresh in progress
* and update the masters info. If it won't change then we can just
* unlock and exit.
*/
if (count != zone->masterscnt ||
!same_masters(zone->masters, masters, count) ||
!same_keynames(zone->masterkeynames, keynames, count)) {
if (zone->request != NULL)
dns_request_cancel(zone->request);
} else
goto unlock;
if (zone->masters != NULL) {
isc_mem_put(zone->mctx, zone->masters,
zone->masterscnt * sizeof(*new));
zone->masters = NULL;
}
if (zone->masterkeynames != NULL) {
for (i = 0; i < zone->masterscnt; i++) {
if (zone->masterkeynames[i] != NULL) {
dns_name_free(zone->masterkeynames[i],
zone->mctx);
isc_mem_put(zone->mctx,
zone->masterkeynames[i],
sizeof(dns_name_t));
zone->masterkeynames[i] = NULL;
}
}
isc_mem_put(zone->mctx, zone->masterkeynames,
zone->masterscnt * sizeof(dns_name_t *));
zone->masterkeynames = NULL;
}
if (zone->mastersok != NULL) {
isc_mem_put(zone->mctx, zone->mastersok,
zone->masterscnt * sizeof(isc_boolean_t));
zone->mastersok = NULL;
}
zone->masterscnt = 0;
/*
* If count == 0, don't allocate any space for masters, mastersok or
* keynames so internally, those pointers are NULL if count == 0
*/
if (count == 0)
goto unlock;
/*
* masters must contain count elements!
*/
new = isc_mem_get(zone->mctx, count * sizeof(*new));
if (new == NULL) {
result = ISC_R_NOMEMORY;
goto unlock;
}
memcpy(new, masters, count * sizeof(*new));
/*
* Similarly for mastersok.
*/
newok = isc_mem_get(zone->mctx, count * sizeof(*newok));
if (newok == NULL) {
result = ISC_R_NOMEMORY;
isc_mem_put(zone->mctx, new, count * sizeof(*new));
goto unlock;
};
for (i = 0; i < count; i++)
newok[i] = ISC_FALSE;
/*
* if keynames is non-NULL, it must contain count elements!
*/
newname = NULL;
if (keynames != NULL) {
newname = isc_mem_get(zone->mctx, count * sizeof(*newname));
if (newname == NULL) {
result = ISC_R_NOMEMORY;
isc_mem_put(zone->mctx, new, count * sizeof(*new));
isc_mem_put(zone->mctx, newok, count * sizeof(*newok));
goto unlock;
}
for (i = 0; i < count; i++)
newname[i] = NULL;
for (i = 0; i < count; i++) {
if (keynames[i] != NULL) {
newname[i] = isc_mem_get(zone->mctx,
sizeof(dns_name_t));
if (newname[i] == NULL)
goto allocfail;
dns_name_init(newname[i], NULL);
result = dns_name_dup(keynames[i], zone->mctx,
newname[i]);
if (result != ISC_R_SUCCESS) {
allocfail:
for (i = 0; i < count; i++)
if (newname[i] != NULL)
dns_name_free(
newname[i],
zone->mctx);
isc_mem_put(zone->mctx, new,
count * sizeof(*new));
isc_mem_put(zone->mctx, newok,
count * sizeof(*newok));
isc_mem_put(zone->mctx, newname,
count * sizeof(*newname));
goto unlock;
}
}
}
}
/*
* Everything is ok so attach to the zone.
*/
zone->masters = new;
zone->mastersok = newok;
zone->masterkeynames = newname;
zone->masterscnt = count;
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOMASTERS);
unlock:
UNLOCK_ZONE(zone);
return (result);
}
isc_result_t
dns_zone_getdb(dns_zone_t *zone, dns_db_t **dpb) {
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db == NULL)
result = DNS_R_NOTLOADED;
else
dns_db_attach(zone->db, dpb);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
return (result);
}
/*
* Co-ordinates the starting of routine jobs.
*/
void
dns_zone_maintenance(dns_zone_t *zone) {
const char me[] = "dns_zone_maintenance";
isc_time_t now;
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
LOCK_ZONE(zone);
TIME_NOW(&now);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
}
static inline isc_boolean_t
was_dumping(dns_zone_t *zone) {
isc_boolean_t dumping;
REQUIRE(LOCKED_ZONE(zone));
dumping = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING);
if (!dumping) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
isc_time_settoepoch(&zone->dumptime);
}
return (dumping);
}
#define MAXZONEKEYS 10
static isc_result_t
do_one_tuple(dns_difftuple_t **tuple, dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff)
{
dns_diff_t temp_diff;
isc_result_t result;
/*
* Create a singleton diff.
*/
dns_diff_init(diff->mctx, &temp_diff);
temp_diff.resign = diff->resign;
ISC_LIST_APPEND(temp_diff.tuples, *tuple, link);
/*
* Apply it to the database.
*/
result = dns_diff_apply(&temp_diff, db, ver);
ISC_LIST_UNLINK(temp_diff.tuples, *tuple, link);
if (result != ISC_R_SUCCESS) {
dns_difftuple_free(tuple);
return (result);
}
/*
* Merge it into the current pending journal entry.
*/
dns_diff_appendminimal(diff, tuple);
/*
* Do not clear temp_diff.
*/
return (ISC_R_SUCCESS);
}
static isc_result_t
increment_soa_serial(dns_db_t *db, dns_dbversion_t *ver,
dns_diff_t *diff, isc_mem_t *mctx)
{
dns_difftuple_t *deltuple = NULL;
dns_difftuple_t *addtuple = NULL;
isc_uint32_t serial;
isc_result_t result;
CHECK(dns_db_createsoatuple(db, ver, mctx, DNS_DIFFOP_DEL, &deltuple));
CHECK(dns_difftuple_copy(deltuple, &addtuple));
addtuple->op = DNS_DIFFOP_ADD;
serial = dns_soa_getserial(&addtuple->rdata);
/* RFC1982 */
serial = (serial + 1) & 0xFFFFFFFF;
if (serial == 0)
serial = 1;
dns_soa_setserial(serial, &addtuple->rdata);
CHECK(do_one_tuple(&deltuple, db, ver, diff));
CHECK(do_one_tuple(&addtuple, db, ver, diff));
result = ISC_R_SUCCESS;
failure:
if (addtuple != NULL)
dns_difftuple_free(&addtuple);
if (deltuple != NULL)
dns_difftuple_free(&deltuple);
return (result);
}
static isc_result_t
update_one_rr(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff,
dns_diffop_t op, dns_name_t *name, dns_ttl_t ttl,
dns_rdata_t *rdata)
{
dns_difftuple_t *tuple = NULL;
isc_result_t result;
result = dns_difftuple_create(diff->mctx, op,
name, ttl, rdata, &tuple);
if (result != ISC_R_SUCCESS)
return (result);
return (do_one_tuple(&tuple, db, ver, diff));
}
static isc_boolean_t
ksk_sanity(dns_db_t *db, dns_dbversion_t *ver) {
isc_boolean_t ret = ISC_FALSE;
isc_boolean_t have_ksk = ISC_FALSE, have_nonksk = ISC_FALSE;
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_dnskey_t dnskey;
dns_rdataset_init(&rdataset);
CHECK(dns_db_findnode(db, dns_db_origin(db), ISC_FALSE, &node));
CHECK(dns_db_findrdataset(db, node, ver, dns_rdatatype_dnskey, 0, 0,
&rdataset, NULL));
CHECK(dns_rdataset_first(&rdataset));
while (result == ISC_R_SUCCESS && (!have_ksk || !have_nonksk)) {
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &dnskey, NULL));
if ((dnskey.flags & (DNS_KEYFLAG_OWNERMASK|DNS_KEYTYPE_NOAUTH))
== DNS_KEYOWNER_ZONE) {
if ((dnskey.flags & DNS_KEYFLAG_KSK) != 0)
have_ksk = ISC_TRUE;
else
have_nonksk = ISC_TRUE;
}
dns_rdata_reset(&rdata);
result = dns_rdataset_next(&rdataset);
}
if (have_ksk && have_nonksk)
ret = ISC_TRUE;
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (node != NULL)
dns_db_detachnode(db, &node);
return (ret);
}
static isc_result_t
find_zone_keys(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver,
isc_mem_t *mctx, unsigned int maxkeys,
dst_key_t **keys, unsigned int *nkeys)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
const char *directory = dns_zone_getkeydirectory(zone);
CHECK(dns_db_findnode(db, dns_db_origin(db), ISC_FALSE, &node));
result = dns_dnssec_findzonekeys2(db, ver, node, dns_db_origin(db),
directory, mctx, maxkeys, keys,
nkeys);
if (result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
offline(dns_db_t *db, dns_dbversion_t *ver, dns_diff_t *diff, dns_name_t *name,
dns_ttl_t ttl, dns_rdata_t *rdata)
{
isc_result_t result;
if ((rdata->flags & DNS_RDATA_OFFLINE) != 0)
return (ISC_R_SUCCESS);
result = update_one_rr(db, ver, diff, DNS_DIFFOP_DELRESIGN,
name, ttl, rdata);
if (result != ISC_R_SUCCESS)
return (result);
rdata->flags |= DNS_RDATA_OFFLINE;
result = update_one_rr(db, ver, diff, DNS_DIFFOP_ADDRESIGN,
name, ttl, rdata);
return (result);
}
static void
set_key_expiry_warning(dns_zone_t *zone, isc_stdtime_t when, isc_stdtime_t now)
{
unsigned int delta;
zone->key_expiry = when;
if (when <= now) {
dns_zone_log(zone, ISC_LOG_ERROR,
"DNSKEY RRSIG(s) have expired");
isc_time_settoepoch(&zone->keywarntime);
} else if (when < now + 7 * 24 * 3600) {
dns_zone_log(zone, ISC_LOG_WARNING,
"DNSKEY RRSIG(s) will expire at %u",
when); /* XXXMPA convert to date. */
delta = when - now;
delta--; /* loop prevention */
delta /= 24 * 3600; /* to whole days */
delta *= 24 * 3600; /* to seconds */
isc_time_set(&zone->keywarntime, when - delta, 0);
} else {
dns_zone_log(zone, ISC_LOG_NOTICE, /* XXMPA ISC_LOG_DEBUG(1) */
"setting keywarntime to %u - 7 days",
when); /* XXXMPA convert to date. */
isc_time_set(&zone->keywarntime, when - 7 * 24 * 3600, 0);
}
}
/*
* Delete expired RRsigs and any RRsigs we are about to re-sign.
* See also update.c:del_keysigs().
*/
static isc_result_t
del_sigs(dns_zone_t *zone, dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name,
dns_rdatatype_t type, dns_diff_t *diff, dst_key_t **keys,
unsigned int nkeys, isc_stdtime_t now)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned int i;
dns_rdata_rrsig_t rrsig;
isc_boolean_t found;
isc_stdtime_t warn = 0, maybe = 0;
dns_rdataset_init(&rdataset);
if (type == dns_rdatatype_nsec3)
result = dns_db_findnsec3node(db, name, ISC_FALSE, &node);
else
result = dns_db_findnode(db, name, ISC_FALSE, &node);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
goto failure;
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_rrsig, type,
(isc_stdtime_t) 0, &rdataset, NULL);
dns_db_detachnode(db, &node);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
goto failure;
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &rrsig, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (type != dns_rdatatype_dnskey) {
result = update_one_rr(db, ver, diff,
DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata);
dns_rdata_reset(&rdata);
if (result != ISC_R_SUCCESS)
break;
continue;
}
/*
* RRSIG(DNSKEY) requires special processing.
*/
found = ISC_FALSE;
for (i = 0; i < nkeys; i++) {
if (rrsig.algorithm == dst_key_alg(keys[i]) &&
rrsig.keyid == dst_key_id(keys[i])) {
found = ISC_TRUE;
/*
* Mark offline RRSIG(DNSKEY).
* We want the earliest offline expire time
* iff there is a new offline signature.
*/
if (!dst_key_isprivate(keys[i])) {
if (warn != 0 &&
warn > rrsig.timeexpire)
warn = rrsig.timeexpire;
if (rdata.flags & DNS_RDATA_OFFLINE) {
if (maybe == 0 ||
maybe > rrsig.timeexpire)
maybe =
rrsig.timeexpire;
break;
}
if (warn == 0)
warn = maybe;
if (warn == 0 ||
warn > rrsig.timeexpire)
warn = rrsig.timeexpire;
result = offline(db, ver, diff, name,
rdataset.ttl, &rdata);
break;
}
result = update_one_rr(db, ver, diff,
DNS_DIFFOP_DEL,
name, rdataset.ttl,
&rdata);
break;
}
}
/*
* If there is not a matching DNSKEY then
* delete the RRSIG.
*/
if (!found)
result = update_one_rr(db, ver, diff, DNS_DIFFOP_DEL,
name, rdataset.ttl, &rdata);
dns_rdata_reset(&rdata);
if (result != ISC_R_SUCCESS)
break;
}
dns_rdataset_disassociate(&rdataset);
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
if (warn != 0)
set_key_expiry_warning(zone, warn, now);
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static isc_result_t
add_sigs(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name,
dns_rdatatype_t type, dns_diff_t *diff, dst_key_t **keys,
unsigned int nkeys, isc_mem_t *mctx, isc_stdtime_t inception,
isc_stdtime_t expire, isc_boolean_t check_ksk)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_rdata_t sig_rdata = DNS_RDATA_INIT;
unsigned char data[1024]; /* XXX */
isc_buffer_t buffer;
unsigned int i;
dns_rdataset_init(&rdataset);
isc_buffer_init(&buffer, data, sizeof(data));
if (type == dns_rdatatype_nsec3)
result = dns_db_findnsec3node(db, name, ISC_FALSE, &node);
else
result = dns_db_findnode(db, name, ISC_FALSE, &node);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
goto failure;
result = dns_db_findrdataset(db, node, ver, type, 0,
(isc_stdtime_t) 0, &rdataset, NULL);
dns_db_detachnode(db, &node);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
goto failure;
for (i = 0; i < nkeys; i++) {
if (check_ksk && type != dns_rdatatype_dnskey &&
(dst_key_flags(keys[i]) & DNS_KEYFLAG_KSK) != 0)
continue;
if (!dst_key_isprivate(keys[i]))
continue;
/* Calculate the signature, creating a RRSIG RDATA. */
CHECK(dns_dnssec_sign(name, &rdataset, keys[i],
&inception, &expire,
mctx, &buffer, &sig_rdata));
/* Update the database and journal with the RRSIG. */
/* XXX inefficient - will cause dataset merging */
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADDRESIGN,
name, rdataset.ttl, &sig_rdata));
dns_rdata_reset(&sig_rdata);
}
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (node != NULL)
dns_db_detachnode(db, &node);
return (result);
}
static void
zone_resigninc(dns_zone_t *zone) {
const char *journalfile;
dns_db_t *db = NULL;
dns_dbversion_t *version = NULL;
dns_diff_t sig_diff;
dns_fixedname_t fixed;
dns_name_t *name;
dns_rdataset_t rdataset;
dns_rdatatype_t covers;
dst_key_t *zone_keys[MAXZONEKEYS];
isc_boolean_t check_ksk;
isc_result_t result;
isc_stdtime_t now, inception, soaexpire, expire, stop;
isc_uint32_t jitter;
unsigned int i;
unsigned int nkeys = 0;
unsigned int resign;
dns_rdataset_init(&rdataset);
dns_fixedname_init(&fixed);
dns_diff_init(zone->mctx, &sig_diff);
sig_diff.resign = zone->sigresigninginterval;
/*
* Updates are disabled. Pause for 5 minutes.
*/
if (zone->update_disabled) {
result = ISC_R_FAILURE;
goto failure;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
result = dns_db_newversion(db, &version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_db_newversion -> %s\n",
dns_result_totext(result));
goto failure;
}
result = find_zone_keys(zone, db, version, zone->mctx, MAXZONEKEYS,
zone_keys, &nkeys);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:find_zone_keys -> %s\n",
dns_result_totext(result));
goto failure;
}
isc_stdtime_get(&now);
inception = now - 3600; /* Allow for clock skew. */
soaexpire = now + dns_zone_getsigvalidityinterval(zone);
/*
* Spread out signatures over time if they happen to be
* clumped. We don't do this for each add_sigs() call as
* we still want some clustering to occur.
*/
isc_random_get(&jitter);
expire = soaexpire - jitter % 3600;
stop = now + 5;
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
if (check_ksk)
check_ksk = ksk_sanity(db, version);
name = dns_fixedname_name(&fixed);
result = dns_db_getsigningtime(db, &rdataset, name);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_db_getsigningtime -> %s\n",
dns_result_totext(result));
}
i = 0;
while (result == ISC_R_SUCCESS) {
resign = rdataset.resign;
covers = rdataset.covers;
/*
* Stop if we hit the SOA as that means we have walked the
* entire zone. The SOA record should always be the most
* recent signature.
*/
/* XXXMPA increase number of RRsets signed pre call */
if (covers == dns_rdatatype_soa || i++ > zone->signatures ||
resign > stop) {
/*
* Ensure that we don't loop resigning the SOA.
*/
if (covers == dns_rdatatype_soa)
dns_db_resigned(db, &rdataset, version);
dns_rdataset_disassociate(&rdataset);
break;
}
dns_db_resigned(db, &rdataset, version);
dns_rdataset_disassociate(&rdataset);
result = del_sigs(zone, db, version, name, covers, &sig_diff,
zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:del_sigs -> %s\n",
dns_result_totext(result));
break;
}
result = add_sigs(db, version, name, covers, &sig_diff,
zone_keys, nkeys, zone->mctx, inception,
expire, check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:add_sigs -> %s\n",
dns_result_totext(result));
break;
}
result = dns_db_getsigningtime(db, &rdataset,
dns_fixedname_name(&fixed));
if (nkeys == 0 && result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
break;
}
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_db_getsigningtime -> %s\n",
dns_result_totext(result));
}
if (result != ISC_R_NOMORE && result != ISC_R_SUCCESS)
goto failure;
result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa,
&sig_diff, zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:del_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
result = increment_soa_serial(db, version, &sig_diff, zone->mctx);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:increment_soa_serial -> %s\n",
dns_result_totext(result));
goto failure;
}
/*
* Generate maximum life time signatures so that the above loop
* termination is sensible.
*/
result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa,
&sig_diff, zone_keys, nkeys, zone->mctx, inception,
soaexpire, check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:add_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
journalfile = dns_zone_getjournal(zone);
if (journalfile != NULL) {
dns_journal_t *journal = NULL;
result = dns_journal_open(zone->mctx, journalfile,
ISC_TRUE, &journal);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_journal_open -> %s\n",
dns_result_totext(result));
goto failure;
}
result = dns_journal_write_transaction(journal, &sig_diff);
dns_journal_destroy(&journal);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_resigninc:dns_journal_write_transaction -> %s\n",
dns_result_totext(result));
goto failure;
}
}
/*
* Everything has succeeded. Commit the changes.
*/
dns_db_closeversion(db, &version, ISC_TRUE);
failure:
dns_diff_clear(&sig_diff);
for (i = 0; i < nkeys; i++)
dst_key_free(&zone_keys[i]);
if (version != NULL) {
dns_db_closeversion(zone->db, &version, ISC_FALSE);
dns_db_detach(&db);
} else if (db != NULL)
dns_db_detach(&db);
if (result == ISC_R_SUCCESS) {
set_resigntime(zone);
LOCK_ZONE(zone);
zone_needdump(zone, DNS_DUMP_DELAY);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
UNLOCK_ZONE(zone);
} else {
/*
* Something failed. Retry in 5 minutes.
*/
isc_interval_t ival;
isc_interval_set(&ival, 300, 0);
isc_time_nowplusinterval(&zone->resigntime, &ival);
}
}
static isc_result_t
next_active(dns_db_t *db, dns_dbversion_t *version, dns_name_t *oldname,
dns_name_t *newname, isc_boolean_t bottom)
{
isc_result_t result;
dns_dbiterator_t *dbit = NULL;
dns_rdatasetiter_t *rdsit = NULL;
dns_dbnode_t *node = NULL;
CHECK(dns_db_createiterator(db, DNS_DB_NONSEC3, &dbit));
CHECK(dns_dbiterator_seek(dbit, oldname));
do {
result = dns_dbiterator_next(dbit);
if (result == ISC_R_NOMORE)
CHECK(dns_dbiterator_first(dbit));
CHECK(dns_dbiterator_current(dbit, &node, newname));
if (bottom && dns_name_issubdomain(newname, oldname) &&
!dns_name_equal(newname, oldname)) {
dns_db_detachnode(db, &node);
continue;
}
/*
* Is this node empty?
*/
CHECK(dns_db_allrdatasets(db, node, version, 0, &rdsit));
result = dns_rdatasetiter_first(rdsit);
dns_db_detachnode(db, &node);
dns_rdatasetiter_destroy(&rdsit);
if (result != ISC_R_NOMORE)
break;
} while (1);
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
if (dbit != NULL)
dns_dbiterator_destroy(&dbit);
return (result);
}
static void
set_bit(unsigned char *array, unsigned int index) {
unsigned int shift, mask;
shift = 7 - (index % 8);
mask = 1 << shift;
array[index / 8] |= mask;
}
static isc_boolean_t
signed_with_key(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
dns_rdatatype_t type, dst_key_t *key)
{
isc_result_t result;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_rrsig_t rrsig;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_rrsig,
type, 0, &rdataset, NULL);
if (result != ISC_R_SUCCESS)
return (ISC_FALSE);
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &rrsig, NULL);
INSIST(result == ISC_R_SUCCESS);
if (rrsig.algorithm == dst_key_alg(key) &&
rrsig.keyid == dst_key_id(key)) {
dns_rdataset_disassociate(&rdataset);
return (ISC_TRUE);
}
dns_rdata_reset(&rdata);
}
dns_rdataset_disassociate(&rdataset);
return (ISC_FALSE);
}
static isc_result_t
add_nsec(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_dbnode_t *node, dns_ttl_t ttl, isc_boolean_t bottom,
dns_diff_t *diff)
{
dns_fixedname_t fixed;
dns_name_t *next;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_result_t result;
unsigned char nsecbuffer[DNS_NSEC_BUFFERSIZE];
dns_fixedname_init(&fixed);
next = dns_fixedname_name(&fixed);
CHECK(next_active(db, version, name, next, bottom));
CHECK(dns_nsec_buildrdata(db, version, node, next, nsecbuffer,
&rdata));
if (dns_name_equal(dns_db_origin(db), name)) {
/*
* Set the OPT bit to indicate that this is a
* partially secure zone.
*/
isc_region_t region;
dns_rdata_toregion(&rdata, &region);
dns_name_fromregion(next, &region);
isc_region_consume(&region, next->length);
INSIST(region.length > (2 + dns_rdatatype_opt / 8) &&
region.base[0] == 0 &&
region.base[1] > dns_rdatatype_opt / 8);
set_bit(region.base + 2, dns_rdatatype_opt);
}
CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_ADD, name, ttl,
&rdata));
failure:
return (result);
}
static isc_result_t
sign_a_node(dns_db_t *db, dns_name_t *name, dns_dbnode_t *node,
dns_dbversion_t *version, isc_boolean_t build_nsec3,
isc_boolean_t build_nsec, dst_key_t *key,
isc_stdtime_t inception, isc_stdtime_t expire,
unsigned int minimum, isc_boolean_t is_ksk,
isc_boolean_t *delegation, dns_diff_t *diff,
isc_int32_t *signatures, isc_mem_t *mctx)
{
isc_result_t result;
dns_rdatasetiter_t *iterator = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_buffer_t buffer;
unsigned char data[1024];
isc_boolean_t seen_soa, seen_ns, seen_rr, seen_dname, seen_nsec,
seen_nsec3, seen_ds;
isc_boolean_t bottom;
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result != ISC_R_SUCCESS) {
if (result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
return (result);
}
dns_rdataset_init(&rdataset);
isc_buffer_init(&buffer, data, sizeof(data));
seen_rr = seen_soa = seen_ns = seen_dname = seen_nsec =
seen_nsec3 = seen_ds = ISC_FALSE;
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
if (rdataset.type == dns_rdatatype_soa)
seen_soa = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_ns)
seen_ns = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_ds)
seen_ds = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_dname)
seen_dname = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_nsec)
seen_nsec = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_nsec3)
seen_nsec3 = ISC_TRUE;
seen_rr = ISC_TRUE;
dns_rdataset_disassociate(&rdataset);
}
if (result != ISC_R_NOMORE)
goto failure;
if (seen_ns && !seen_soa)
*delegation = ISC_TRUE;
/*
* Going from insecure to NSEC3.
* Don't generate NSEC3 records for NSEC3 records.
*/
if (build_nsec3 && !seen_nsec3 && seen_rr) {
isc_boolean_t unsecure = !seen_ds && seen_ns && !seen_soa;
CHECK(dns_nsec3_addnsec3s(db, version, name, minimum,
unsecure, diff));
(*signatures)--;
}
/*
* Going from insecure to NSEC.
* Don't generate NSEC records for NSEC3 records.
*/
if (build_nsec && !seen_nsec3 && !seen_nsec && seen_rr) {
/* Build and add NSEC. */
bottom = (seen_ns && !seen_soa) || seen_dname;
CHECK(add_nsec(db, version, name, node, minimum, bottom, diff));
/* Count a NSEC generation as a signature generation. */
(*signatures)--;
}
result = dns_rdatasetiter_first(iterator);
while (result == ISC_R_SUCCESS) {
dns_rdatasetiter_current(iterator, &rdataset);
if (rdataset.type == dns_rdatatype_soa ||
rdataset.type == dns_rdatatype_rrsig)
goto next_rdataset;
if (is_ksk && rdataset.type != dns_rdatatype_dnskey)
goto next_rdataset;
if (*delegation &&
rdataset.type != dns_rdatatype_ds &&
rdataset.type != dns_rdatatype_nsec)
goto next_rdataset;
if (signed_with_key(db, node, version, rdataset.type, key))
goto next_rdataset;
/* Calculate the signature, creating a RRSIG RDATA. */
CHECK(dns_dnssec_sign(name, &rdataset, key, &inception,
&expire, mctx, &buffer, &rdata));
/* Update the database and journal with the RRSIG. */
/* XXX inefficient - will cause dataset merging */
CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_ADDRESIGN,
name, rdataset.ttl, &rdata));
dns_rdata_reset(&rdata);
(*signatures)--;
next_rdataset:
dns_rdataset_disassociate(&rdataset);
result = dns_rdatasetiter_next(iterator);
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
if (seen_dname)
*delegation = ISC_TRUE;
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (iterator != NULL)
dns_rdatasetiter_destroy(&iterator);
return (result);
}
static isc_result_t
updatesecure(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_ttl_t minimum, isc_boolean_t *secureupdated, dns_diff_t *diff)
{
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned char nsecbuffer[DNS_NSEC_BUFFERSIZE];
dns_rdataset_t rdataset;
dns_rdata_nsec_t nsec;
dns_dbnode_t *node = NULL;
/*
* Check to see if the OPT bit has already been cleared.
*/
CHECK(dns_db_getoriginnode(db, &node));
dns_rdataset_init(&rdataset);
CHECK(dns_db_findrdataset(db, node, version, dns_rdatatype_nsec,
dns_rdatatype_none, 0, &rdataset, NULL));
CHECK(dns_rdataset_first(&rdataset));
dns_rdataset_current(&rdataset, &rdata);
/*
* Find the NEXT name for building the new record.
*/
CHECK(dns_rdata_tostruct(&rdata, &nsec, NULL));
/*
* Delete the old NSEC record.
*/
CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_DEL, name, minimum,
&rdata));
dns_rdata_reset(&rdata);
/*
* Add the new NSEC record.
*/
CHECK(dns_nsec_buildrdata(db, version, node, &nsec.next, nsecbuffer,
&rdata));
CHECK(update_one_rr(db, version, diff, DNS_DIFFOP_ADD, name, minimum,
&rdata));
dns_rdata_reset(&rdata);
if (secureupdated != NULL)
*secureupdated = ISC_TRUE;
failure:
if (node != NULL)
dns_db_detachnode(db, &node);
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
return (result);
}
static isc_result_t
updatesignwithkey(dns_signing_t *signing, dns_dbversion_t *version,
dns_name_t *name, dns_rdatatype_t privatetype,
dns_diff_t *diff)
{
isc_result_t result;
dns_dbnode_t *node = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
unsigned char data[5];
isc_boolean_t seen_done = ISC_FALSE;
dns_rdataset_init(&rdataset);
result = dns_db_getoriginnode(signing->db, &node);
if (result != ISC_R_SUCCESS)
goto failure;
result = dns_db_findrdataset(signing->db, node, version, privatetype,
dns_rdatatype_none, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
goto failure;
}
if (result != ISC_R_SUCCESS)
goto failure;
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
if (rdata.length != 5 ||
rdata.data[0] != signing->algorithm ||
rdata.data[1] != ((signing->keyid >> 8) & 0xff) ||
rdata.data[2] != (signing->keyid & 0xff)) {
dns_rdata_reset(&rdata);
continue;
}
if (!signing->delete && rdata.data[4] != 0)
seen_done = ISC_TRUE;
else
CHECK(update_one_rr(signing->db, version, diff,
DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
dns_rdata_reset(&rdata);
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
if (!signing->delete && !seen_done) {
data[0] = signing->algorithm;
data[1] = (signing->keyid >> 8) & 0xff;
data[2] = signing->keyid & 0xff;
data[3] = 0;
data[4] = 1;
rdata.length = sizeof(data);
rdata.data = data;
rdata.type = privatetype;
rdata.rdclass = dns_db_class(signing->db);
CHECK(update_one_rr(signing->db, version, diff, DNS_DIFFOP_ADD,
name, rdataset.ttl, &rdata));
}
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
if (node != NULL)
dns_db_detachnode(signing->db, &node);
return (result);
}
static isc_result_t
fixup_nsec3param(dns_db_t *db, dns_dbversion_t *ver, dns_nsec3chain_t *chain,
isc_boolean_t active, dns_diff_t *diff)
{
dns_dbnode_t *node = NULL;
dns_name_t *name = dns_db_origin(db);
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t rdataset;
dns_rdata_nsec3param_t nsec3param;
isc_result_t result;
isc_buffer_t buffer;
unsigned char parambuf[DNS_NSEC3PARAM_BUFFERSIZE];
dns_ttl_t ttl = 0;
dns_rdataset_init(&rdataset);
result = dns_db_getoriginnode(db, &node);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3param,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
goto add;
if (result != ISC_R_SUCCESS)
goto failure;
/*
* Preserve the existing ttl.
*/
ttl = rdataset.ttl;
/*
* Delete all NSEC3PARAM records which match that in nsec3chain.
*/
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &nsec3param, NULL));
if (nsec3param.hash != chain->nsec3param.hash ||
(active && nsec3param.flags != 0) ||
nsec3param.iterations != chain->nsec3param.iterations ||
nsec3param.salt_length != chain->nsec3param.salt_length ||
memcmp(nsec3param.salt, chain->nsec3param.salt,
nsec3param.salt_length)) {
dns_rdata_reset(&rdata);
continue;
}
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL,
name, rdataset.ttl, &rdata));
dns_rdata_reset(&rdata);
}
if (result != ISC_R_NOMORE)
goto failure;
add:
if ((chain->nsec3param.flags & DNS_NSEC3FLAG_REMOVE) != 0) {
result = ISC_R_SUCCESS;
goto failure;
}
/*
* Add a NSEC3PARAM record which matches that in nsec3chain but
* with all flags bits cleared.
*
* Note: we do not clear chain->nsec3param.flags as this change
* may be reversed.
*/
isc_buffer_init(&buffer, &parambuf, sizeof(parambuf));
CHECK(dns_rdata_fromstruct(&rdata, dns_db_class(db),
dns_rdatatype_nsec3param,
&chain->nsec3param, &buffer));
rdata.data[1] = 0; /* Clear flag bits. */
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_ADD, name, ttl, &rdata));
failure:
dns_db_detachnode(db, &node);
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
return (result);
}
static isc_result_t
delete_nsec(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node,
dns_name_t *name, dns_diff_t *diff)
{
dns_rdataset_t rdataset;
isc_result_t result;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
return (result);
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
failure:
dns_rdataset_disassociate(&rdataset);
return (result);
}
static isc_result_t
deletematchingnsec3(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node,
dns_name_t *name, const dns_rdata_nsec3param_t *param,
dns_diff_t *diff)
{
dns_rdataset_t rdataset;
dns_rdata_nsec3_t nsec3;
isc_result_t result;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
return (ISC_R_SUCCESS);
if (result != ISC_R_SUCCESS)
return (result);
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &nsec3, NULL));
if (nsec3.hash != param->hash ||
nsec3.iterations != param->iterations ||
nsec3.salt_length != param->salt_length ||
memcmp(nsec3.salt, param->salt, nsec3.salt_length))
continue;
CHECK(update_one_rr(db, ver, diff, DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
failure:
dns_rdataset_disassociate(&rdataset);
return (result);
}
static isc_result_t
need_nsec_chain(dns_db_t *db, dns_dbversion_t *ver,
const dns_rdata_nsec3param_t *param,
isc_boolean_t *answer, isc_boolean_t *updatensec)
{
dns_dbnode_t *node = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_nsec3param_t myparam;
dns_rdataset_t rdataset;
isc_result_t result;
*answer = ISC_FALSE;
result = dns_db_getoriginnode(db, &node);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND)
goto check_nsec3param;
if (result != ISC_R_SUCCESS)
goto failure;
CHECK(dns_rdataset_first(&rdataset));
dns_rdataset_current(&rdataset, &rdata);
if (!dns_nsec_typepresent(&rdata, dns_rdatatype_opt)) {
/*
* We have a complete NSEC chain. Signal to update
* the apex NSEC record.
*/
*updatensec = ISC_TRUE;
goto failure;
}
dns_rdataset_disassociate(&rdataset);
dns_rdata_reset(&rdata);
check_nsec3param:
result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3param,
0, 0, &rdataset, NULL);
if (result == ISC_R_NOTFOUND) {
*answer = ISC_TRUE;
dns_db_detachnode(db, &node);
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS) {
dns_db_detachnode(db, &node);
return (result);
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &myparam, NULL));
dns_rdata_reset(&rdata);
/*
* Ignore any NSEC3PARAM removals.
*/
if (NSEC3REMOVE(myparam.flags))
continue;
/*
* Ignore the chain that we are in the process of deleting.
*/
if (myparam.hash == param->hash &&
myparam.iterations == param->iterations &&
myparam.salt_length == param->salt_length &&
!memcmp(myparam.salt, param->salt, myparam.salt_length))
continue;
/*
* Found an active NSEC3 chain.
*/
break;
}
if (result == ISC_R_NOMORE) {
*answer = ISC_TRUE;
result = ISC_R_SUCCESS;
}
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
dns_db_detachnode(db, &node);
return (result);
}
/*
* Incrementally build and sign a new NSEC3 chain using the parameters
* requested.
*/
static void
zone_nsec3chain(dns_zone_t *zone) {
const char *journalfile;
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_diff_t sig_diff;
dns_diff_t nsec_diff;
dns_diff_t nsec3_diff;
dns_diff_t param_diff;
dns_fixedname_t fixed;
dns_fixedname_t nextfixed;
dns_name_t *name, *nextname;
dns_rdataset_t rdataset;
dns_nsec3chain_t *nsec3chain = NULL, *nextnsec3chain;
dns_nsec3chainlist_t cleanup;
dst_key_t *zone_keys[MAXZONEKEYS];
isc_int32_t signatures;
isc_boolean_t check_ksk, is_ksk;
isc_boolean_t delegation;
isc_boolean_t first;
isc_result_t result;
isc_stdtime_t now, inception, soaexpire, expire, stop;
isc_uint32_t jitter;
unsigned int i;
unsigned int nkeys = 0;
isc_uint32_t nodes;
isc_boolean_t unsecure = ISC_FALSE;
isc_boolean_t seen_soa, seen_ns, seen_dname, seen_ds;
isc_boolean_t seen_nsec, seen_nsec3, seen_rr;
dns_rdatasetiter_t *iterator = NULL;
dns_difftuple_t *tuple;
isc_boolean_t buildnsecchain;
isc_boolean_t updatensec = ISC_FALSE;
dns_rdataset_init(&rdataset);
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
dns_fixedname_init(&nextfixed);
nextname = dns_fixedname_name(&nextfixed);
dns_diff_init(zone->mctx, &param_diff);
dns_diff_init(zone->mctx, &nsec3_diff);
dns_diff_init(zone->mctx, &nsec_diff);
dns_diff_init(zone->mctx, &sig_diff);
sig_diff.resign = zone->sigresigninginterval;
ISC_LIST_INIT(cleanup);
/*
* Updates are disabled. Pause for 5 minutes.
*/
if (zone->update_disabled) {
result = ISC_R_FAILURE;
goto failure;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
result = dns_db_newversion(db, &version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:dns_db_newversion -> %s\n",
dns_result_totext(result));
goto failure;
}
result = find_zone_keys(zone, db, version, zone->mctx,
MAXZONEKEYS, zone_keys, &nkeys);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:find_zone_keys -> %s\n",
dns_result_totext(result));
goto failure;
}
isc_stdtime_get(&now);
inception = now - 3600; /* Allow for clock skew. */
soaexpire = now + dns_zone_getsigvalidityinterval(zone);
/*
* Spread out signatures over time if they happen to be
* clumped. We don't do this for each add_sigs() call as
* we still want some clustering to occur.
*/
isc_random_get(&jitter);
expire = soaexpire - jitter % 3600;
stop = now + 5;
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
if (check_ksk)
check_ksk = ksk_sanity(db, version);
/*
* We keep pulling nodes off each iterator in turn until
* we have no more nodes to pull off or we reach the limits
* for this quantum.
*/
nodes = zone->nodes;
signatures = zone->signatures;
LOCK_ZONE(zone);
nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
UNLOCK_ZONE(zone);
first = ISC_TRUE;
if (nsec3chain != NULL)
nsec3chain->save_delete_nsec = nsec3chain->delete_nsec;
/*
* Generate new NSEC3 chains first.
*/
while (nsec3chain != NULL && nodes-- > 0 && signatures > 0) {
LOCK_ZONE(zone);
nextnsec3chain = ISC_LIST_NEXT(nsec3chain, link);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (nsec3chain->done || nsec3chain->db != zone->db) {
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain, link);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
if (ISC_LIST_TAIL(cleanup) == nsec3chain)
goto next_addchain;
/*
* Possible future db.
*/
if (nsec3chain->db != db) {
goto next_addchain;
}
if (NSEC3REMOVE(nsec3chain->nsec3param.flags))
goto next_addchain;
is_ksk = ISC_FALSE;
delegation = ISC_FALSE;
dns_dbiterator_current(nsec3chain->dbiterator, &node, name);
if (nsec3chain->delete_nsec) {
delegation = ISC_FALSE;
dns_dbiterator_pause(nsec3chain->dbiterator);
CHECK(delete_nsec(db, version, node, name, &nsec_diff));
goto next_addnode;
}
/*
* On the first pass we need to check if the current node
* has not been obscured.
*/
delegation = ISC_FALSE;
unsecure = ISC_FALSE;
if (first) {
dns_fixedname_t ffound;
dns_name_t *found;
dns_fixedname_init(&ffound);
found = dns_fixedname_name(&ffound);
result = dns_db_find(db, name, version,
dns_rdatatype_soa,
DNS_DBFIND_NOWILD, 0, NULL, found,
NULL, NULL);
if ((result == DNS_R_DELEGATION ||
result == DNS_R_DNAME) &&
!dns_name_equal(name, found)) {
/*
* Remember the obscuring name so that
* we skip all obscured names.
*/
dns_name_copy(found, name, NULL);
delegation = ISC_TRUE;
goto next_addnode;
}
}
/*
* Check to see if this is a bottom of zone node.
*/
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result == ISC_R_NOTFOUND) /* Empty node? */
goto next_addnode;
if (result != ISC_R_SUCCESS)
goto failure;
seen_soa = seen_ns = seen_dname = seen_ds = seen_nsec =
ISC_FALSE;
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
INSIST(rdataset.type != dns_rdatatype_nsec3);
if (rdataset.type == dns_rdatatype_soa)
seen_soa = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_ns)
seen_ns = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_dname)
seen_dname = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_ds)
seen_ds = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_nsec)
seen_nsec = ISC_TRUE;
dns_rdataset_disassociate(&rdataset);
}
dns_rdatasetiter_destroy(&iterator);
/*
* Is there a NSEC chain than needs to be cleaned up?
*/
if (seen_nsec)
nsec3chain->seen_nsec = ISC_TRUE;
if (seen_ns && !seen_soa && !seen_ds)
unsecure = ISC_TRUE;
if ((seen_ns && !seen_soa) || seen_dname)
delegation = ISC_TRUE;
/*
* Process one node.
*/
dns_dbiterator_pause(nsec3chain->dbiterator);
CHECK(dns_nsec3_addnsec3(db, version, name,
&nsec3chain->nsec3param,
zone->minimum, unsecure, &nsec3_diff));
/*
* Treat each call to dns_nsec3_addnsec3() as if it's cost is
* two signatures. Additionally there will, in general, be
* two signature generated below.
*
* If we are only changing the optout flag the cost is half
* that of the cost of generating a completely new chain.
*/
signatures -= 4;
/*
* Go onto next node.
*/
next_addnode:
first = ISC_FALSE;
dns_db_detachnode(db, &node);
do {
result = dns_dbiterator_next(nsec3chain->dbiterator);
if (result == ISC_R_NOMORE && nsec3chain->delete_nsec) {
CHECK(fixup_nsec3param(db, version, nsec3chain,
ISC_FALSE, &param_diff));
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain,
link);
UNLOCK_ZONE(zone);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
goto next_addchain;
}
if (result == ISC_R_NOMORE) {
dns_dbiterator_pause(nsec3chain->dbiterator);
if (nsec3chain->seen_nsec) {
CHECK(fixup_nsec3param(db, version,
nsec3chain,
ISC_TRUE,
&param_diff));
nsec3chain->delete_nsec = ISC_TRUE;
goto same_addchain;
}
CHECK(fixup_nsec3param(db, version, nsec3chain,
ISC_FALSE, &param_diff));
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain,
link);
UNLOCK_ZONE(zone);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
goto next_addchain;
} else if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"dns_dbiterator_next -> %s\n",
dns_result_totext(result));
goto failure;
} else if (delegation) {
dns_dbiterator_current(nsec3chain->dbiterator,
&node, nextname);
dns_db_detachnode(db, &node);
if (!dns_name_issubdomain(nextname, name))
break;
} else
break;
} while (1);
continue;
same_addchain:
CHECK(dns_dbiterator_first(nsec3chain->dbiterator));
first = ISC_TRUE;
continue;
next_addchain:
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain = nextnsec3chain;
first = ISC_TRUE;
if (nsec3chain != NULL)
nsec3chain->save_delete_nsec = nsec3chain->delete_nsec;
}
/*
* Process removals.
*/
LOCK_ZONE(zone);
nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
UNLOCK_ZONE(zone);
first = ISC_TRUE;
buildnsecchain = ISC_FALSE;
while (nsec3chain != NULL && nodes-- > 0 && signatures > 0) {
LOCK_ZONE(zone);
nextnsec3chain = ISC_LIST_NEXT(nsec3chain, link);
UNLOCK_ZONE(zone);
if (nsec3chain->db != db)
goto next_removechain;
if (!NSEC3REMOVE(nsec3chain->nsec3param.flags))
goto next_removechain;
/*
* Work out if we need to build a NSEC chain as a consequence
* of removing this NSEC3 chain.
*/
if (first && !updatensec &&
(nsec3chain->nsec3param.flags & DNS_NSEC3FLAG_NONSEC) == 0)
CHECK(need_nsec_chain(db, version,
&nsec3chain->nsec3param,
&buildnsecchain, &updatensec));
dns_dbiterator_current(nsec3chain->dbiterator, &node, name);
delegation = ISC_FALSE;
if (!buildnsecchain) {
/*
* Delete the NSECPARAM record that matches this chain.
*/
if (first)
CHECK(fixup_nsec3param(db, version, nsec3chain,
ISC_TRUE, &param_diff));
/*
* Delete the NSEC3 records.
*/
CHECK(deletematchingnsec3(db, version, node, name,
&nsec3chain->nsec3param,
&nsec3_diff));
goto next_removenode;
}
if (first) {
dns_fixedname_t ffound;
dns_name_t *found;
dns_fixedname_init(&ffound);
found = dns_fixedname_name(&ffound);
result = dns_db_find(db, name, version,
dns_rdatatype_soa,
DNS_DBFIND_NOWILD, 0, NULL, found,
NULL, NULL);
if ((result == DNS_R_DELEGATION ||
result == DNS_R_DNAME) &&
!dns_name_equal(name, found)) {
/*
* Remember the obscuring name so that
* we skip all obscured names.
*/
dns_name_copy(found, name, NULL);
delegation = ISC_TRUE;
goto next_removenode;
}
}
/*
* Check to see if this is a bottom of zone node.
*/
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result == ISC_R_NOTFOUND) /* Empty node? */
goto next_removenode;
if (result != ISC_R_SUCCESS)
goto failure;
seen_soa = seen_ns = seen_dname = seen_nsec3 = seen_nsec =
seen_rr = ISC_FALSE;
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
if (rdataset.type == dns_rdatatype_soa)
seen_soa = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_ns)
seen_ns = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_dname)
seen_dname = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_nsec)
seen_nsec = ISC_TRUE;
else if (rdataset.type == dns_rdatatype_nsec3)
seen_nsec3 = ISC_TRUE;
seen_rr = ISC_TRUE;
dns_rdataset_disassociate(&rdataset);
}
dns_rdatasetiter_destroy(&iterator);
if (!seen_rr || seen_nsec3 || seen_nsec)
goto next_removenode;
if ((seen_ns && !seen_soa) || seen_dname)
delegation = ISC_TRUE;
CHECK(add_nsec(db, version, name, node, zone->minimum,
delegation, &nsec_diff));
next_removenode:
first = ISC_FALSE;
dns_db_detachnode(db, &node);
do {
result = dns_dbiterator_next(nsec3chain->dbiterator);
if (result == ISC_R_NOMORE && buildnsecchain) {
/*
* The NSEC chain should now be built.
* We can now remove the NSEC3 chain.
*/
updatensec = ISC_TRUE;
goto same_removechain;
}
if (result == ISC_R_NOMORE) {
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zone->nsec3chain, nsec3chain,
link);
UNLOCK_ZONE(zone);
ISC_LIST_APPEND(cleanup, nsec3chain, link);
dns_dbiterator_pause(nsec3chain->dbiterator);
CHECK(fixup_nsec3param(db, version, nsec3chain,
ISC_FALSE, &param_diff));
goto next_removechain;
} else if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:"
"dns_dbiterator_next -> %s\n",
dns_result_totext(result));
goto failure;
} else if (delegation) {
dns_dbiterator_current(nsec3chain->dbiterator,
&node, nextname);
dns_db_detachnode(db, &node);
if (!dns_name_issubdomain(nextname, name))
break;
} else
break;
} while (1);
continue;
same_removechain:
CHECK(dns_dbiterator_first(nsec3chain->dbiterator));
buildnsecchain = ISC_FALSE;
first = ISC_TRUE;
continue;
next_removechain:
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain = nextnsec3chain;
first = ISC_TRUE;
}
/*
* Add / update signatures for the NSEC3 records.
*/
for (tuple = ISC_LIST_HEAD(nsec3_diff.tuples);
tuple != NULL;
tuple = ISC_LIST_HEAD(nsec3_diff.tuples)) {
/*
* We have changed the NSEC3 RRset above so we need to update
* the signatures.
*/
result = del_sigs(zone, db, version, &tuple->name,
dns_rdatatype_nsec3, &sig_diff,
zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:del_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, version, &tuple->name,
dns_rdatatype_nsec3, &sig_diff, zone_keys,
nkeys, zone->mctx, inception, expire,
check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:add_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
do {
dns_difftuple_t *next = ISC_LIST_NEXT(tuple, link);
while (next != NULL &&
!dns_name_equal(&tuple->name, &next->name))
next = ISC_LIST_NEXT(next, link);
ISC_LIST_UNLINK(nsec3_diff.tuples, tuple, link);
dns_diff_appendminimal(&sig_diff, &tuple);
INSIST(tuple == NULL);
tuple = next;
} while (tuple != NULL);
}
for (tuple = ISC_LIST_HEAD(param_diff.tuples);
tuple != NULL;
tuple = ISC_LIST_HEAD(param_diff.tuples)) {
/*
* We have changed the NSEC3PARAM RRset above so we need to
* update the signatures.
*/
result = del_sigs(zone, db, version, &tuple->name,
dns_rdatatype_nsec3param, &sig_diff,
zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:del_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, version, &tuple->name,
dns_rdatatype_nsec3param, &sig_diff,
zone_keys, nkeys, zone->mctx, inception,
expire, check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:add_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
ISC_LIST_UNLINK(param_diff.tuples, tuple, link);
dns_diff_appendminimal(&sig_diff, &tuple);
INSIST(tuple == NULL);
}
if (updatensec)
CHECK(updatesecure(db, version, &zone->origin, zone->minimum,
NULL, &nsec_diff));
for (tuple = ISC_LIST_HEAD(nsec_diff.tuples);
tuple != NULL;
tuple = ISC_LIST_HEAD(nsec_diff.tuples)) {
result = del_sigs(zone, db, version, &tuple->name,
dns_rdatatype_nsec, &sig_diff,
zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:del_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, version, &tuple->name,
dns_rdatatype_nsec, &sig_diff,
zone_keys, nkeys, zone->mctx, inception,
expire, check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_nsec3chain:add_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
ISC_LIST_UNLINK(nsec_diff.tuples, tuple, link);
dns_diff_appendminimal(&sig_diff, &tuple);
INSIST(tuple == NULL);
}
/*
* If we made no effective changes to the zone then we can just
* cleanup otherwise we need to increment the serial.
*/
if (ISC_LIST_HEAD(sig_diff.tuples) == NULL)
goto done;
result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa,
&sig_diff, zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"del_sigs -> %s\n", dns_result_totext(result));
goto failure;
}
result = increment_soa_serial(db, version, &sig_diff, zone->mctx);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"increment_soa_serial -> %s\n",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa,
&sig_diff, zone_keys, nkeys, zone->mctx, inception,
soaexpire, check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"add_sigs -> %s\n", dns_result_totext(result));
goto failure;
}
journalfile = dns_zone_getjournal(zone);
if (journalfile != NULL) {
dns_journal_t *journal = NULL;
result = dns_journal_open(zone->mctx, journalfile,
ISC_TRUE, &journal);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"dns_journal_open -> %s\n",
dns_result_totext(result));
goto failure;
}
result = dns_journal_write_transaction(journal, &sig_diff);
dns_journal_destroy(&journal);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR, "zone_nsec3chain:"
"dns_journal_write_transaction -> %s\n",
dns_result_totext(result));
goto failure;
}
}
LOCK_ZONE(zone);
zone_needdump(zone, DNS_DUMP_DELAY);
UNLOCK_ZONE(zone);
done:
/*
* Pause all iterators so that dns_db_closeversion() can succeed.
*/
LOCK_ZONE(zone);
for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
nsec3chain != NULL;
nsec3chain = ISC_LIST_NEXT(nsec3chain, link))
dns_dbiterator_pause(nsec3chain->dbiterator);
UNLOCK_ZONE(zone);
/*
* Everything has succeeded. Commit the changes.
*/
dns_db_closeversion(db, &version, ISC_TRUE);
/*
* Everything succeeded so we can clean these up now.
*/
nsec3chain = ISC_LIST_HEAD(cleanup);
while (nsec3chain != NULL) {
ISC_LIST_UNLINK(cleanup, nsec3chain, link);
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
nsec3chain = ISC_LIST_HEAD(cleanup);
}
set_resigntime(zone);
failure:
/*
* On error roll back the current nsec3chain.
*/
if (result != ISC_R_SUCCESS && nsec3chain != NULL) {
if (nsec3chain->done) {
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
} else {
result = dns_dbiterator_first(nsec3chain->dbiterator);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain->delete_nsec = nsec3chain->save_delete_nsec;
}
}
/*
* Rollback the cleanup list.
*/
nsec3chain = ISC_LIST_TAIL(cleanup);
while (nsec3chain != NULL) {
ISC_LIST_UNLINK(cleanup, nsec3chain, link);
if (nsec3chain->done) {
dns_db_detach(&nsec3chain->db);
dns_dbiterator_destroy(&nsec3chain->dbiterator);
isc_mem_put(zone->mctx, nsec3chain, sizeof *nsec3chain);
} else {
LOCK_ZONE(zone);
ISC_LIST_PREPEND(zone->nsec3chain, nsec3chain, link);
UNLOCK_ZONE(zone);
result = dns_dbiterator_first(nsec3chain->dbiterator);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_dbiterator_pause(nsec3chain->dbiterator);
nsec3chain->delete_nsec = nsec3chain->save_delete_nsec;
}
nsec3chain = ISC_LIST_TAIL(cleanup);
}
LOCK_ZONE(zone);
for (nsec3chain = ISC_LIST_HEAD(zone->nsec3chain);
nsec3chain != NULL;
nsec3chain = ISC_LIST_NEXT(nsec3chain, link))
dns_dbiterator_pause(nsec3chain->dbiterator);
UNLOCK_ZONE(zone);
dns_diff_clear(&param_diff);
dns_diff_clear(&nsec3_diff);
dns_diff_clear(&nsec_diff);
dns_diff_clear(&sig_diff);
if (iterator != NULL)
dns_rdatasetiter_destroy(&iterator);
for (i = 0; i < nkeys; i++)
dst_key_free(&zone_keys[i]);
if (version != NULL) {
dns_db_closeversion(db, &version, ISC_FALSE);
dns_db_detach(&db);
} else if (db != NULL)
dns_db_detach(&db);
LOCK_ZONE(zone);
if (ISC_LIST_HEAD(zone->nsec3chain) != NULL) {
isc_interval_t i;
if (zone->update_disabled || result != ISC_R_SUCCESS)
isc_interval_set(&i, 60, 0); /* 1 minute */
else
isc_interval_set(&i, 0, 10000000); /* 10 ms */
isc_time_nowplusinterval(&zone->nsec3chaintime, &i);
} else
isc_time_settoepoch(&zone->nsec3chaintime);
UNLOCK_ZONE(zone);
}
static isc_result_t
del_sig(dns_db_t *db, dns_dbversion_t *version, dns_name_t *name,
dns_dbnode_t *node, unsigned int nkeys, dns_secalg_t algorithm,
isc_uint16_t keyid, dns_diff_t *diff)
{
dns_rdata_rrsig_t rrsig;
dns_rdataset_t rdataset;
dns_rdatasetiter_t *iterator = NULL;
isc_result_t result;
result = dns_db_allrdatasets(db, node, version, 0, &iterator);
if (result != ISC_R_SUCCESS) {
if (result == ISC_R_NOTFOUND)
result = ISC_R_SUCCESS;
return (result);
}
dns_rdataset_init(&rdataset);
for (result = dns_rdatasetiter_first(iterator);
result == ISC_R_SUCCESS;
result = dns_rdatasetiter_next(iterator)) {
dns_rdatasetiter_current(iterator, &rdataset);
if (nkeys == 0 && rdataset.type == dns_rdatatype_nsec) {
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(update_one_rr(db, version, diff,
DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
}
if (result != ISC_R_NOMORE)
goto failure;
dns_rdataset_disassociate(&rdataset);
continue;
}
if (rdataset.type != dns_rdatatype_rrsig) {
dns_rdataset_disassociate(&rdataset);
continue;
}
for (result = dns_rdataset_first(&rdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(&rdataset)) {
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&rdataset, &rdata);
CHECK(dns_rdata_tostruct(&rdata, &rrsig, NULL));
if (rrsig.algorithm != algorithm ||
rrsig.keyid != keyid)
continue;
CHECK(update_one_rr(db, version, diff,
DNS_DIFFOP_DEL, name,
rdataset.ttl, &rdata));
}
dns_rdataset_disassociate(&rdataset);
if (result != ISC_R_NOMORE)
break;
}
if (result == ISC_R_NOMORE)
result = ISC_R_SUCCESS;
failure:
if (dns_rdataset_isassociated(&rdataset))
dns_rdataset_disassociate(&rdataset);
dns_rdatasetiter_destroy(&iterator);
return (result);
}
/*
* Incrementally sign the zone using the keys requested.
* Builds the NSEC chain if required.
*/
static void
zone_sign(dns_zone_t *zone) {
const char *journalfile;
dns_db_t *db = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_diff_t sig_diff;
dns_fixedname_t fixed;
dns_fixedname_t nextfixed;
dns_name_t *name, *nextname;
dns_rdataset_t rdataset;
dns_signing_t *signing, *nextsigning;
dns_signinglist_t cleanup;
dst_key_t *zone_keys[MAXZONEKEYS];
isc_int32_t signatures;
isc_boolean_t check_ksk, is_ksk;
isc_boolean_t commit = ISC_FALSE;
isc_boolean_t delegation;
isc_boolean_t finishedakey = ISC_FALSE;
isc_boolean_t secureupdated = ISC_FALSE;
isc_boolean_t build_nsec3 = ISC_FALSE, build_nsec = ISC_FALSE;
isc_boolean_t first;
isc_result_t result;
isc_stdtime_t now, inception, soaexpire, expire, stop;
isc_uint32_t jitter;
unsigned int i;
unsigned int nkeys = 0;
isc_uint32_t nodes;
dns_rdataset_init(&rdataset);
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
dns_fixedname_init(&nextfixed);
nextname = dns_fixedname_name(&nextfixed);
dns_diff_init(zone->mctx, &sig_diff);
sig_diff.resign = zone->sigresigninginterval;
ISC_LIST_INIT(cleanup);
/*
* Updates are disabled. Pause for 5 minutes.
*/
if (zone->update_disabled) {
result = ISC_R_FAILURE;
goto failure;
}
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
result = dns_db_newversion(db, &version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:dns_db_newversion -> %s\n",
dns_result_totext(result));
goto failure;
}
result = find_zone_keys(zone, db, version, zone->mctx,
MAXZONEKEYS, zone_keys, &nkeys);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:find_zone_keys -> %s\n",
dns_result_totext(result));
goto failure;
}
isc_stdtime_get(&now);
inception = now - 3600; /* Allow for clock skew. */
soaexpire = now + dns_zone_getsigvalidityinterval(zone);
/*
* Spread out signatures over time if they happen to be
* clumped. We don't do this for each add_sigs() call as
* we still want some clustering to occur.
*/
isc_random_get(&jitter);
expire = soaexpire - jitter % 3600;
stop = now + 5;
check_ksk = DNS_ZONE_OPTION(zone, DNS_ZONEOPT_UPDATECHECKKSK);
if (check_ksk)
check_ksk = ksk_sanity(db, version);
/*
* We keep pulling nodes off each iterator in turn until
* we have no more nodes to pull off or we reach the limits
* for this quantum.
*/
nodes = zone->nodes;
signatures = zone->signatures;
signing = ISC_LIST_HEAD(zone->signing);
first = ISC_TRUE;
/*
* See if we have a NSEC chain.
*/
result = dns_db_getoriginnode(db, &node);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_db_findrdataset(db, node, version, dns_rdatatype_nsec,
dns_rdatatype_none, 0, &rdataset, NULL);
dns_db_detachnode(db, &node);
if (result == ISC_R_SUCCESS) {
build_nsec = ISC_TRUE;
dns_rdataset_disassociate(&rdataset);
} else if (result != ISC_R_NOTFOUND) {
goto failure;
} else {
/*
* No NSEC chain present.
* See if we need to build a NSEC3 chain?
*/
result = dns_nsec3_active(db, version, ISC_TRUE, &build_nsec3);
if (result == ISC_R_SUCCESS) {
if (build_nsec3)
build_nsec3 = ISC_FALSE;
else {
result = dns_nsec3_active(db, version,
ISC_FALSE,
&build_nsec3);
if (build_nsec3)
secureupdated = ISC_TRUE;
else
build_nsec = ISC_TRUE;
}
}
}
while (signing != NULL && nodes-- > 0 && signatures > 0) {
nextsigning = ISC_LIST_NEXT(signing, link);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (signing->done || signing->db != zone->db) {
/*
* The zone has been reloaded. We will have
* created new signings as part of the reload
* process so we can destroy this one.
*/
ISC_LIST_UNLINK(zone->signing, signing, link);
ISC_LIST_APPEND(cleanup, signing, link);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
goto next_signing;
}
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (signing->db != db)
goto next_signing;
is_ksk = ISC_FALSE;
delegation = ISC_FALSE;
dns_dbiterator_current(signing->dbiterator, &node, name);
if (signing->delete) {
dns_dbiterator_pause(signing->dbiterator);
CHECK(del_sig(db, version, name, node, nkeys,
signing->algorithm, signing->keyid,
&sig_diff));
goto next_node;
}
/*
* On the first pass we need to check if the current node
* has not been obscured.
*/
if (first) {
dns_fixedname_t ffound;
dns_name_t *found;
dns_fixedname_init(&ffound);
found = dns_fixedname_name(&ffound);
result = dns_db_find(db, name, version,
dns_rdatatype_soa,
DNS_DBFIND_NOWILD, 0, NULL, found,
NULL, NULL);
if ((result == DNS_R_DELEGATION ||
result == DNS_R_DNAME) &&
!dns_name_equal(name, found)) {
/*
* Remember the obscuring name so that
* we skip all obscured names.
*/
dns_name_copy(found, name, NULL);
delegation = ISC_TRUE;
goto next_node;
}
}
/*
* Process one node.
*/
dns_dbiterator_pause(signing->dbiterator);
for (i = 0; i < nkeys; i++) {
/*
* Find the key we want to sign with.
*/
if (dst_key_alg(zone_keys[i]) != signing->algorithm ||
dst_key_id(zone_keys[i]) != signing->keyid ||
!dst_key_isprivate(zone_keys[i]))
continue;
/*
* Do we do KSK processing?
*/
if (check_ksk &&
(dst_key_flags(zone_keys[i]) & DNS_KEYFLAG_KSK) != 0)
is_ksk = ISC_TRUE;
CHECK(sign_a_node(db, name, node, version, build_nsec3,
build_nsec, zone_keys[i], inception,
expire, zone->minimum, is_ksk,
&delegation, &sig_diff, &signatures,
zone->mctx));
break;
}
/*
* Go onto next node.
*/
next_node:
first = ISC_FALSE;
dns_db_detachnode(db, &node);
do {
result = dns_dbiterator_next(signing->dbiterator);
if (result == ISC_R_NOMORE) {
ISC_LIST_UNLINK(zone->signing, signing, link);
ISC_LIST_APPEND(cleanup, signing, link);
dns_dbiterator_pause(signing->dbiterator);
finishedakey = ISC_TRUE;
if (!is_ksk && !secureupdated && nkeys != 0 &&
build_nsec) {
/*
* We have finished regenerating the
* zone with a zone signing key.
* The NSEC chain is now complete and
* there is a full set of signatures
* for the zone. We can now clear the
* OPT bit from the NSEC record.
*/
result = updatesecure(db, version,
&zone->origin,
zone->minimum,
&secureupdated,
&sig_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone,
ISC_LOG_ERROR,
"updatesecure -> %s\n",
dns_result_totext(result));
goto failure;
}
}
result = updatesignwithkey(signing, version,
&zone->origin,
zone->privatetype,
&sig_diff);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"updatesignwithkey -> %s\n",
dns_result_totext(result));
goto failure;
}
goto next_signing;
} else if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:dns_dbiterator_next -> %s\n",
dns_result_totext(result));
goto failure;
} else if (delegation) {
dns_dbiterator_current(signing->dbiterator,
&node, nextname);
dns_db_detachnode(db, &node);
if (!dns_name_issubdomain(nextname, name))
break;
} else
break;
} while (1);
continue;
next_signing:
dns_dbiterator_pause(signing->dbiterator);
signing = nextsigning;
first = ISC_TRUE;
}
if (secureupdated) {
/*
* We have changed the NSEC RRset above so we need to update
* the signatures.
*/
result = del_sigs(zone, db, version, &zone->origin,
dns_rdatatype_nsec, &sig_diff, zone_keys,
nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:del_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, version, &zone->origin,
dns_rdatatype_nsec, &sig_diff, zone_keys,
nkeys, zone->mctx, inception, soaexpire,
check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:add_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
}
if (finishedakey) {
/*
* We have changed the RRset above so we need to update
* the signatures.
*/
result = del_sigs(zone, db, version, &zone->origin,
zone->privatetype, &sig_diff,
zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:del_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
result = add_sigs(db, version, &zone->origin,
zone->privatetype, &sig_diff,
zone_keys, nkeys, zone->mctx, inception,
soaexpire, check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:add_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
}
/*
* Have we changed anything?
*/
if (ISC_LIST_HEAD(sig_diff.tuples) == NULL)
goto pauseall;
commit = ISC_TRUE;
result = del_sigs(zone, db, version, &zone->origin, dns_rdatatype_soa,
&sig_diff, zone_keys, nkeys, now);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:del_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
result = increment_soa_serial(db, version, &sig_diff, zone->mctx);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:increment_soa_serial -> %s\n",
dns_result_totext(result));
goto failure;
}
/*
* Generate maximum life time signatures so that the above loop
* termination is sensible.
*/
result = add_sigs(db, version, &zone->origin, dns_rdatatype_soa,
&sig_diff, zone_keys, nkeys, zone->mctx, inception,
soaexpire, check_ksk);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:add_sigs -> %s\n",
dns_result_totext(result));
goto failure;
}
/*
* Write changes to journal file.
*/
journalfile = dns_zone_getjournal(zone);
if (journalfile != NULL) {
dns_journal_t *journal = NULL;
result = dns_journal_open(zone->mctx, journalfile,
ISC_TRUE, &journal);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:dns_journal_open -> %s\n",
dns_result_totext(result));
goto failure;
}
result = dns_journal_write_transaction(journal, &sig_diff);
dns_journal_destroy(&journal);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"zone_sign:dns_journal_write_transaction -> %s\n",
dns_result_totext(result));
goto failure;
}
}
pauseall:
/*
* Pause all iterators so that dns_db_closeversion() can succeed.
*/
for (signing = ISC_LIST_HEAD(zone->signing);
signing != NULL;
signing = ISC_LIST_NEXT(signing, link))
dns_dbiterator_pause(signing->dbiterator);
for (signing = ISC_LIST_HEAD(cleanup);
signing != NULL;
signing = ISC_LIST_NEXT(signing, link))
dns_dbiterator_pause(signing->dbiterator);
/*
* Everything has succeeded. Commit the changes.
*/
dns_db_closeversion(db, &version, commit);
/*
* Everything succeeded so we can clean these up now.
*/
signing = ISC_LIST_HEAD(cleanup);
while (signing != NULL) {
ISC_LIST_UNLINK(cleanup, signing, link);
dns_db_detach(&signing->db);
dns_dbiterator_destroy(&signing->dbiterator);
isc_mem_put(zone->mctx, signing, sizeof *signing);
signing = ISC_LIST_HEAD(cleanup);
}
set_resigntime(zone);
if (commit) {
LOCK_ZONE(zone);
zone_needdump(zone, DNS_DUMP_DELAY);
UNLOCK_ZONE(zone);
}
failure:
/*
* Rollback the cleanup list.
*/
signing = ISC_LIST_HEAD(cleanup);
while (signing != NULL) {
ISC_LIST_UNLINK(cleanup, signing, link);
ISC_LIST_APPEND(zone->signing, signing, link);
dns_dbiterator_first(signing->dbiterator);
dns_dbiterator_pause(signing->dbiterator);
signing = ISC_LIST_HEAD(cleanup);
}
for (signing = ISC_LIST_HEAD(zone->signing);
signing != NULL;
signing = ISC_LIST_NEXT(signing, link))
dns_dbiterator_pause(signing->dbiterator);
dns_diff_clear(&sig_diff);
for (i = 0; i < nkeys; i++)
dst_key_free(&zone_keys[i]);
if (version != NULL) {
dns_db_closeversion(db, &version, ISC_FALSE);
dns_db_detach(&db);
} else if (db != NULL)
dns_db_detach(&db);
if (ISC_LIST_HEAD(zone->signing) != NULL) {
isc_interval_t i;
if (zone->update_disabled || result != ISC_R_SUCCESS)
isc_interval_set(&i, 60, 0); /* 1 minute */
else
isc_interval_set(&i, 0, 10000000); /* 10 ms */
isc_time_nowplusinterval(&zone->signingtime, &i);
} else
isc_time_settoepoch(&zone->signingtime);
}
static void
zone_maintenance(dns_zone_t *zone) {
const char me[] = "zone_maintenance";
isc_time_t now;
isc_result_t result;
isc_boolean_t dumping;
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
/*
* Configuring the view of this zone may have
* failed, for example because the config file
* had a syntax error. In that case, the view
* adb or resolver, and we had better not try
* to do maintenance on it.
*/
if (zone->view == NULL || zone->view->adb == NULL)
return;
TIME_NOW(&now);
/*
* Expire check.
*/
switch (zone->type) {
case dns_zone_slave:
case dns_zone_stub:
LOCK_ZONE(zone);
if (isc_time_compare(&now, &zone->expiretime) >= 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
zone_expire(zone);
zone->refreshtime = now;
}
UNLOCK_ZONE(zone);
break;
default:
break;
}
/*
* Up to date check.
*/
switch (zone->type) {
case dns_zone_slave:
case dns_zone_stub:
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH) &&
isc_time_compare(&now, &zone->refreshtime) >= 0)
dns_zone_refresh(zone);
break;
default:
break;
}
/*
* Do we need to consolidate the backing store?
*/
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
LOCK_ZONE(zone);
if (zone->masterfile != NULL &&
isc_time_compare(&now, &zone->dumptime) >= 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP)) {
dumping = was_dumping(zone);
} else
dumping = ISC_TRUE;
UNLOCK_ZONE(zone);
if (!dumping) {
result = zone_dump(zone, ISC_TRUE); /* task locked */
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_WARNING,
"dump failed: %s",
dns_result_totext(result));
}
break;
default:
break;
}
switch (zone->type) {
case dns_zone_master:
case dns_zone_slave:
/*
* Do we need to send out notify messages?
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY) &&
isc_time_compare(&now, &zone->notifytime) >= 0)
zone_notify(zone, &now);
/*
* Do we need to sign/resign some RRsets?
*/
if (!isc_time_isepoch(&zone->signingtime) &&
isc_time_compare(&now, &zone->signingtime) >= 0)
zone_sign(zone);
else if (!isc_time_isepoch(&zone->resigntime) &&
isc_time_compare(&now, &zone->resigntime) >= 0)
zone_resigninc(zone);
else if (!isc_time_isepoch(&zone->nsec3chaintime) &&
isc_time_compare(&now, &zone->nsec3chaintime) >= 0)
zone_nsec3chain(zone);
/*
* Do we need to issue a key expiry warning.
*/
if (!isc_time_isepoch(&zone->keywarntime) &&
isc_time_compare(&now, &zone->keywarntime) >= 0)
set_key_expiry_warning(zone, zone->key_expiry,
isc_time_seconds(&now));
break;
default:
break;
}
zone_settimer(zone, &now);
}
void
dns_zone_markdirty(dns_zone_t *zone) {
LOCK_ZONE(zone);
set_resigntime(zone); /* XXXMPA make separate call back */
zone_needdump(zone, DNS_DUMP_DELAY);
UNLOCK_ZONE(zone);
}
void
dns_zone_expire(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone_expire(zone);
UNLOCK_ZONE(zone);
}
static void
zone_expire(dns_zone_t *zone) {
/*
* 'zone' locked by caller.
*/
REQUIRE(LOCKED_ZONE(zone));
dns_zone_log(zone, ISC_LOG_WARNING, "expired");
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_EXPIRED);
zone->refresh = DNS_ZONE_DEFAULTREFRESH;
zone->retry = DNS_ZONE_DEFAULTRETRY;
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
zone_unload(zone);
}
void
dns_zone_refresh(dns_zone_t *zone) {
isc_interval_t i;
isc_uint32_t oldflags;
unsigned int j;
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
return;
/*
* Set DNS_ZONEFLG_REFRESH so that there is only one refresh operation
* in progress at a time.
*/
LOCK_ZONE(zone);
oldflags = zone->flags;
if (zone->masterscnt == 0) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOMASTERS);
if ((oldflags & DNS_ZONEFLG_NOMASTERS) == 0)
dns_zone_log(zone, ISC_LOG_ERROR,
"cannot refresh: no masters");
goto unlock;
}
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
if ((oldflags & (DNS_ZONEFLG_REFRESH|DNS_ZONEFLG_LOADING)) != 0)
goto unlock;
/*
* Set the next refresh time as if refresh check has failed.
* Setting this to the retry time will do that. XXXMLG
* If we are successful it will be reset using zone->refresh.
*/
isc_interval_set(&i, isc_random_jitter(zone->retry, zone->retry / 4),
0);
result = isc_time_nowplusinterval(&zone->refreshtime, &i);
if (result |= ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_WARNING,
"isc_time_nowplusinterval() failed: %s",
dns_result_totext(result));
/*
* When lacking user-specified timer values from the SOA,
* do exponential backoff of the retry time up to a
* maximum of six hours.
*/
if (! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_HAVETIMERS))
zone->retry = ISC_MIN(zone->retry * 2, 6 * 3600);
zone->curmaster = 0;
for (j = 0; j < zone->masterscnt; j++)
zone->mastersok[j] = ISC_FALSE;
/* initiate soa query */
queue_soa_query(zone);
unlock:
UNLOCK_ZONE(zone);
}
isc_result_t
dns_zone_flush(dns_zone_t *zone) {
isc_result_t result = ISC_R_SUCCESS;
isc_boolean_t dumping;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_FLUSH);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
zone->masterfile != NULL) {
result = ISC_R_ALREADYRUNNING;
dumping = was_dumping(zone);
} else
dumping = ISC_TRUE;
UNLOCK_ZONE(zone);
if (!dumping)
result = zone_dump(zone, ISC_FALSE); /* Unknown task. */
return (result);
}
isc_result_t
dns_zone_dump(dns_zone_t *zone) {
isc_result_t result = ISC_R_ALREADYRUNNING;
isc_boolean_t dumping;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
dumping = was_dumping(zone);
UNLOCK_ZONE(zone);
if (!dumping)
result = zone_dump(zone, ISC_FALSE); /* Unknown task. */
return (result);
}
static void
zone_needdump(dns_zone_t *zone, unsigned int delay) {
isc_time_t dumptime;
isc_time_t now;
/*
* 'zone' locked by caller
*/
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
/*
* Do we have a place to dump to and are we loaded?
*/
if (zone->masterfile == NULL ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) == 0)
return;
TIME_NOW(&now);
/* add some noise */
DNS_ZONE_JITTER_ADD(&now, delay, &dumptime);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
if (isc_time_isepoch(&zone->dumptime) ||
isc_time_compare(&zone->dumptime, &dumptime) > 0)
zone->dumptime = dumptime;
if (zone->task != NULL)
zone_settimer(zone, &now);
}
static void
dump_done(void *arg, isc_result_t result) {
const char me[] = "dump_done";
dns_zone_t *zone = arg;
dns_db_t *db;
dns_dbversion_t *version;
isc_boolean_t again = ISC_FALSE;
isc_boolean_t compact = ISC_FALSE;
isc_uint32_t serial;
isc_result_t tresult;
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
if (result == ISC_R_SUCCESS && zone->journal != NULL &&
zone->journalsize != -1) {
/*
* We don't own these, zone->dctx must stay valid.
*/
db = dns_dumpctx_db(zone->dctx);
version = dns_dumpctx_version(zone->dctx);
tresult = dns_db_getsoaserial(db, version, &serial);
/*
* Note: we are task locked here so we can test
* zone->xfr safely.
*/
if (tresult == ISC_R_SUCCESS && zone->xfr == NULL) {
tresult = dns_journal_compact(zone->mctx,
zone->journal,
serial,
zone->journalsize);
switch (tresult) {
case ISC_R_SUCCESS:
case ISC_R_NOSPACE:
case ISC_R_NOTFOUND:
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"dns_journal_compact: %s",
dns_result_totext(tresult));
break;
default:
dns_zone_log(zone, ISC_LOG_ERROR,
"dns_journal_compact failed: %s",
dns_result_totext(tresult));
break;
}
} else if (tresult == ISC_R_SUCCESS) {
compact = ISC_TRUE;
zone->compact_serial = serial;
}
}
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DUMPING);
if (compact)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDCOMPACT);
if (result != ISC_R_SUCCESS && result != ISC_R_CANCELED) {
/*
* Try again in a short while.
*/
zone_needdump(zone, DNS_DUMP_DELAY);
} else if (result == ISC_R_SUCCESS &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING);
isc_time_settoepoch(&zone->dumptime);
again = ISC_TRUE;
} else if (result == ISC_R_SUCCESS)
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FLUSH);
if (zone->dctx != NULL)
dns_dumpctx_detach(&zone->dctx);
zonemgr_putio(&zone->writeio);
UNLOCK_ZONE(zone);
if (again)
(void)zone_dump(zone, ISC_FALSE);
dns_zone_idetach(&zone);
}
static isc_result_t
zone_dump(dns_zone_t *zone, isc_boolean_t compact) {
const char me[] = "zone_dump";
isc_result_t result;
dns_dbversion_t *version = NULL;
isc_boolean_t again;
dns_db_t *db = NULL;
char *masterfile = NULL;
dns_masterformat_t masterformat = dns_masterformat_none;
/*
* 'compact' MUST only be set if we are task locked.
*/
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
redo:
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
LOCK_ZONE(zone);
if (zone->masterfile != NULL) {
masterfile = isc_mem_strdup(zone->mctx, zone->masterfile);
masterformat = zone->masterformat;
}
UNLOCK_ZONE(zone);
if (db == NULL) {
result = DNS_R_NOTLOADED;
goto fail;
}
if (masterfile == NULL) {
result = DNS_R_NOMASTERFILE;
goto fail;
}
if (compact) {
dns_zone_t *dummy = NULL;
LOCK_ZONE(zone);
zone_iattach(zone, &dummy);
result = zonemgr_getio(zone->zmgr, ISC_FALSE, zone->task,
zone_gotwritehandle, zone,
&zone->writeio);
if (result != ISC_R_SUCCESS)
zone_idetach(&dummy);
else
result = DNS_R_CONTINUE;
UNLOCK_ZONE(zone);
} else {
dns_db_currentversion(db, &version);
result = dns_master_dump2(zone->mctx, db, version,
&dns_master_style_default,
masterfile, masterformat);
dns_db_closeversion(db, &version, ISC_FALSE);
}
fail:
if (db != NULL)
dns_db_detach(&db);
if (masterfile != NULL)
isc_mem_free(zone->mctx, masterfile);
masterfile = NULL;
if (result == DNS_R_CONTINUE)
return (ISC_R_SUCCESS); /* XXXMPA */
again = ISC_FALSE;
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DUMPING);
if (result != ISC_R_SUCCESS) {
/*
* Try again in a short while.
*/
zone_needdump(zone, DNS_DUMP_DELAY);
} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DUMPING);
isc_time_settoepoch(&zone->dumptime);
again = ISC_TRUE;
} else
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FLUSH);
UNLOCK_ZONE(zone);
if (again)
goto redo;
return (result);
}
static isc_result_t
dumptostream(dns_zone_t *zone, FILE *fd, const dns_master_style_t *style,
dns_masterformat_t format)
{
isc_result_t result;
dns_dbversion_t *version = NULL;
dns_db_t *db = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (db == NULL)
return (DNS_R_NOTLOADED);
dns_db_currentversion(db, &version);
result = dns_master_dumptostream2(zone->mctx, db, version, style,
format, fd);
dns_db_closeversion(db, &version, ISC_FALSE);
dns_db_detach(&db);
return (result);
}
isc_result_t
dns_zone_dumptostream2(dns_zone_t *zone, FILE *fd, dns_masterformat_t format,
const dns_master_style_t *style) {
return dumptostream(zone, fd, style, format);
}
isc_result_t
dns_zone_dumptostream(dns_zone_t *zone, FILE *fd) {
return dumptostream(zone, fd, &dns_master_style_default,
dns_masterformat_text);
}
isc_result_t
dns_zone_fulldumptostream(dns_zone_t *zone, FILE *fd) {
return dumptostream(zone, fd, &dns_master_style_full,
dns_masterformat_text);
}
void
dns_zone_unload(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone_unload(zone);
UNLOCK_ZONE(zone);
}
static void
notify_cancel(dns_zone_t *zone) {
dns_notify_t *notify;
/*
* 'zone' locked by caller.
*/
REQUIRE(LOCKED_ZONE(zone));
for (notify = ISC_LIST_HEAD(zone->notifies);
notify != NULL;
notify = ISC_LIST_NEXT(notify, link)) {
if (notify->find != NULL)
dns_adb_cancelfind(notify->find);
if (notify->request != NULL)
dns_request_cancel(notify->request);
}
}
static void
zone_unload(dns_zone_t *zone) {
/*
* 'zone' locked by caller.
*/
REQUIRE(LOCKED_ZONE(zone));
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
zone_detachdb(zone);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_LOADED);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDDUMP);
}
void
dns_zone_setminrefreshtime(dns_zone_t *zone, isc_uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->minrefresh = val;
}
void
dns_zone_setmaxrefreshtime(dns_zone_t *zone, isc_uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->maxrefresh = val;
}
void
dns_zone_setminretrytime(dns_zone_t *zone, isc_uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->minretry = val;
}
void
dns_zone_setmaxretrytime(dns_zone_t *zone, isc_uint32_t val) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(val > 0);
zone->maxretry = val;
}
static isc_boolean_t
notify_isqueued(dns_zone_t *zone, dns_name_t *name, isc_sockaddr_t *addr) {
dns_notify_t *notify;
for (notify = ISC_LIST_HEAD(zone->notifies);
notify != NULL;
notify = ISC_LIST_NEXT(notify, link)) {
if (notify->request != NULL)
continue;
if (name != NULL && dns_name_dynamic(&notify->ns) &&
dns_name_equal(name, &notify->ns))
return (ISC_TRUE);
if (addr != NULL && isc_sockaddr_equal(addr, &notify->dst))
return (ISC_TRUE);
}
return (ISC_FALSE);
}
static isc_boolean_t
notify_isself(dns_zone_t *zone, isc_sockaddr_t *dst) {
dns_tsigkey_t *key = NULL;
isc_sockaddr_t src;
isc_sockaddr_t any;
isc_boolean_t isself;
isc_netaddr_t dstaddr;
isc_result_t result;
if (zone->view == NULL || zone->isself == NULL)
return (ISC_FALSE);
switch (isc_sockaddr_pf(dst)) {
case PF_INET:
src = zone->notifysrc4;
isc_sockaddr_any(&any);
break;
case PF_INET6:
src = zone->notifysrc6;
isc_sockaddr_any6(&any);
break;
default:
return (ISC_FALSE);
}
/*
* When sending from any the kernel will assign a source address
* that matches the destination address.
*/
if (isc_sockaddr_eqaddr(&any, &src))
src = *dst;
isc_netaddr_fromsockaddr(&dstaddr, dst);
result = dns_view_getpeertsig(zone->view, &dstaddr, &key);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND)
return (ISC_FALSE);
isself = (zone->isself)(zone->view, key, &src, dst, zone->rdclass,
zone->isselfarg);
if (key != NULL)
dns_tsigkey_detach(&key);
return (isself);
}
static void
notify_destroy(dns_notify_t *notify, isc_boolean_t locked) {
isc_mem_t *mctx;
/*
* Caller holds zone lock.
*/
REQUIRE(DNS_NOTIFY_VALID(notify));
if (notify->zone != NULL) {
if (!locked)
LOCK_ZONE(notify->zone);
REQUIRE(LOCKED_ZONE(notify->zone));
if (ISC_LINK_LINKED(notify, link))
ISC_LIST_UNLINK(notify->zone->notifies, notify, link);
if (!locked)
UNLOCK_ZONE(notify->zone);
if (locked)
zone_idetach(&notify->zone);
else
dns_zone_idetach(&notify->zone);
}
if (notify->find != NULL)
dns_adb_destroyfind(&notify->find);
if (notify->request != NULL)
dns_request_destroy(&notify->request);
if (dns_name_dynamic(&notify->ns))
dns_name_free(&notify->ns, notify->mctx);
mctx = notify->mctx;
isc_mem_put(notify->mctx, notify, sizeof(*notify));
isc_mem_detach(&mctx);
}
static isc_result_t
notify_create(isc_mem_t *mctx, unsigned int flags, dns_notify_t **notifyp) {
dns_notify_t *notify;
REQUIRE(notifyp != NULL && *notifyp == NULL);
notify = isc_mem_get(mctx, sizeof(*notify));
if (notify == NULL)
return (ISC_R_NOMEMORY);
notify->mctx = NULL;
isc_mem_attach(mctx, &notify->mctx);
notify->flags = flags;
notify->zone = NULL;
notify->find = NULL;
notify->request = NULL;
isc_sockaddr_any(&notify->dst);
dns_name_init(&notify->ns, NULL);
ISC_LINK_INIT(notify, link);
notify->magic = NOTIFY_MAGIC;
*notifyp = notify;
return (ISC_R_SUCCESS);
}
/*
* XXXAG should check for DNS_ZONEFLG_EXITING
*/
static void
process_adb_event(isc_task_t *task, isc_event_t *ev) {
dns_notify_t *notify;
isc_eventtype_t result;
UNUSED(task);
notify = ev->ev_arg;
REQUIRE(DNS_NOTIFY_VALID(notify));
INSIST(task == notify->zone->task);
result = ev->ev_type;
isc_event_free(&ev);
if (result == DNS_EVENT_ADBMOREADDRESSES) {
dns_adb_destroyfind(&notify->find);
notify_find_address(notify);
return;
}
if (result == DNS_EVENT_ADBNOMOREADDRESSES) {
LOCK_ZONE(notify->zone);
notify_send(notify);
UNLOCK_ZONE(notify->zone);
}
notify_destroy(notify, ISC_FALSE);
}
static void
notify_find_address(dns_notify_t *notify) {
isc_result_t result;
unsigned int options;
REQUIRE(DNS_NOTIFY_VALID(notify));
options = DNS_ADBFIND_WANTEVENT | DNS_ADBFIND_INET |
DNS_ADBFIND_INET6 | DNS_ADBFIND_RETURNLAME;
if (notify->zone->view->adb == NULL)
goto destroy;
result = dns_adb_createfind(notify->zone->view->adb,
notify->zone->task,
process_adb_event, notify,
&notify->ns, dns_rootname, 0,
options, 0, NULL,
notify->zone->view->dstport,
&notify->find);
/* Something failed? */
if (result != ISC_R_SUCCESS)
goto destroy;
/* More addresses pending? */
if ((notify->find->options & DNS_ADBFIND_WANTEVENT) != 0)
return;
/* We have as many addresses as we can get. */
LOCK_ZONE(notify->zone);
notify_send(notify);
UNLOCK_ZONE(notify->zone);
destroy:
notify_destroy(notify, ISC_FALSE);
}
static isc_result_t
notify_send_queue(dns_notify_t *notify) {
isc_event_t *e;
isc_result_t result;
e = isc_event_allocate(notify->mctx, NULL,
DNS_EVENT_NOTIFYSENDTOADDR,
notify_send_toaddr,
notify, sizeof(isc_event_t));
if (e == NULL)
return (ISC_R_NOMEMORY);
e->ev_arg = notify;
e->ev_sender = NULL;
result = isc_ratelimiter_enqueue(notify->zone->zmgr->rl,
notify->zone->task, &e);
if (result != ISC_R_SUCCESS)
isc_event_free(&e);
return (result);
}
static void
notify_send_toaddr(isc_task_t *task, isc_event_t *event) {
dns_notify_t *notify;
isc_result_t result;
dns_message_t *message = NULL;
isc_netaddr_t dstip;
dns_tsigkey_t *key = NULL;
char addrbuf[ISC_SOCKADDR_FORMATSIZE];
isc_sockaddr_t src;
int timeout;
isc_boolean_t have_notifysource = ISC_FALSE;
notify = event->ev_arg;
REQUIRE(DNS_NOTIFY_VALID(notify));
UNUSED(task);
LOCK_ZONE(notify->zone);
if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_LOADED) == 0) {
result = ISC_R_CANCELED;
goto cleanup;
}
if ((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0 ||
DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_EXITING) ||
notify->zone->view->requestmgr == NULL ||
notify->zone->db == NULL) {
result = ISC_R_CANCELED;
goto cleanup;
}
/*
* The raw IPv4 address should also exist. Don't send to the
* mapped form.
*/
if (isc_sockaddr_pf(&notify->dst) == PF_INET6 &&
IN6_IS_ADDR_V4MAPPED(&notify->dst.type.sin6.sin6_addr)) {
isc_sockaddr_format(&notify->dst, addrbuf, sizeof(addrbuf));
notify_log(notify->zone, ISC_LOG_DEBUG(3),
"notify: ignoring IPv6 mapped IPV4 address: %s",
addrbuf);
result = ISC_R_CANCELED;
goto cleanup;
}
result = notify_createmessage(notify->zone, notify->flags, &message);
if (result != ISC_R_SUCCESS)
goto cleanup;
isc_netaddr_fromsockaddr(&dstip, &notify->dst);
isc_sockaddr_format(&notify->dst, addrbuf, sizeof(addrbuf));
result = dns_view_getpeertsig(notify->zone->view, &dstip, &key);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
notify_log(notify->zone, ISC_LOG_ERROR, "NOTIFY to %s not "
"sent. Peer TSIG key lookup failure.", addrbuf);
goto cleanup_message;
}
notify_log(notify->zone, ISC_LOG_DEBUG(3), "sending notify to %s",
addrbuf);
if (notify->zone->view->peers != NULL) {
dns_peer_t *peer = NULL;
result = dns_peerlist_peerbyaddr(notify->zone->view->peers,
&dstip, &peer);
if (result == ISC_R_SUCCESS) {
result = dns_peer_getnotifysource(peer, &src);
if (result == ISC_R_SUCCESS)
have_notifysource = ISC_TRUE;
}
}
switch (isc_sockaddr_pf(&notify->dst)) {
case PF_INET:
if (!have_notifysource)
src = notify->zone->notifysrc4;
break;
case PF_INET6:
if (!have_notifysource)
src = notify->zone->notifysrc6;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto cleanup_key;
}
timeout = 15;
if (DNS_ZONE_FLAG(notify->zone, DNS_ZONEFLG_DIALNOTIFY))
timeout = 30;
result = dns_request_createvia2(notify->zone->view->requestmgr,
message, &src, &notify->dst, 0, key,
timeout * 3, timeout,
notify->zone->task, notify_done,
notify, &notify->request);
if (result == ISC_R_SUCCESS) {
if (isc_sockaddr_pf(&notify->dst) == AF_INET) {
inc_stats(notify->zone,
dns_zonestatscounter_notifyoutv4);
} else {
inc_stats(notify->zone,
dns_zonestatscounter_notifyoutv6);
}
}
cleanup_key:
if (key != NULL)
dns_tsigkey_detach(&key);
cleanup_message:
dns_message_destroy(&message);
cleanup:
UNLOCK_ZONE(notify->zone);
if (result != ISC_R_SUCCESS)
notify_destroy(notify, ISC_FALSE);
isc_event_free(&event);
}
static void
notify_send(dns_notify_t *notify) {
dns_adbaddrinfo_t *ai;
isc_sockaddr_t dst;
isc_result_t result;
dns_notify_t *new = NULL;
/*
* Zone lock held by caller.
*/
REQUIRE(DNS_NOTIFY_VALID(notify));
REQUIRE(LOCKED_ZONE(notify->zone));
for (ai = ISC_LIST_HEAD(notify->find->list);
ai != NULL;
ai = ISC_LIST_NEXT(ai, publink)) {
dst = ai->sockaddr;
if (notify_isqueued(notify->zone, NULL, &dst))
continue;
if (notify_isself(notify->zone, &dst))
continue;
new = NULL;
result = notify_create(notify->mctx,
(notify->flags & DNS_NOTIFY_NOSOA),
&new);
if (result != ISC_R_SUCCESS)
goto cleanup;
zone_iattach(notify->zone, &new->zone);
ISC_LIST_APPEND(new->zone->notifies, new, link);
new->dst = dst;
result = notify_send_queue(new);
if (result != ISC_R_SUCCESS)
goto cleanup;
new = NULL;
}
cleanup:
if (new != NULL)
notify_destroy(new, ISC_TRUE);
}
void
dns_zone_notify(dns_zone_t *zone) {
isc_time_t now;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
TIME_NOW(&now);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
}
static void
zone_notify(dns_zone_t *zone, isc_time_t *now) {
dns_dbnode_t *node = NULL;
dns_db_t *zonedb = NULL;
dns_dbversion_t *version = NULL;
dns_name_t *origin = NULL;
dns_name_t master;
dns_rdata_ns_t ns;
dns_rdata_soa_t soa;
isc_uint32_t serial;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_t nsrdset;
dns_rdataset_t soardset;
isc_result_t result;
dns_notify_t *notify = NULL;
unsigned int i;
isc_sockaddr_t dst;
isc_boolean_t isqueued;
dns_notifytype_t notifytype;
unsigned int flags = 0;
isc_boolean_t loggednotify = ISC_FALSE;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
notifytype = zone->notifytype;
DNS_ZONE_TIME_ADD(now, zone->notifydelay, &zone->notifytime);
UNLOCK_ZONE(zone);
if (! DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED))
return;
if (notifytype == dns_notifytype_no)
return;
if (notifytype == dns_notifytype_masteronly &&
zone->type != dns_zone_master)
return;
origin = &zone->origin;
/*
* If the zone is dialup we are done as we don't want to send
* the current soa so as to force a refresh query.
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY))
flags |= DNS_NOTIFY_NOSOA;
/*
* Get SOA RRset.
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_attach(zone->db, &zonedb);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (zonedb == NULL)
return;
dns_db_currentversion(zonedb, &version);
result = dns_db_findnode(zonedb, origin, ISC_FALSE, &node);
if (result != ISC_R_SUCCESS)
goto cleanup1;
dns_rdataset_init(&soardset);
result = dns_db_findrdataset(zonedb, node, version, dns_rdatatype_soa,
dns_rdatatype_none, 0, &soardset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup2;
/*
* Find serial and master server's name.
*/
dns_name_init(&master, NULL);
result = dns_rdataset_first(&soardset);
if (result != ISC_R_SUCCESS)
goto cleanup3;
dns_rdataset_current(&soardset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_reset(&rdata);
result = dns_name_dup(&soa.origin, zone->mctx, &master);
serial = soa.serial;
dns_rdataset_disassociate(&soardset);
if (result != ISC_R_SUCCESS)
goto cleanup3;
/*
* Enqueue notify requests for 'also-notify' servers.
*/
LOCK_ZONE(zone);
for (i = 0; i < zone->notifycnt; i++) {
dst = zone->notify[i];
if (notify_isqueued(zone, NULL, &dst))
continue;
result = notify_create(zone->mctx, flags, &notify);
if (result != ISC_R_SUCCESS)
continue;
zone_iattach(zone, &notify->zone);
notify->dst = dst;
ISC_LIST_APPEND(zone->notifies, notify, link);
result = notify_send_queue(notify);
if (result != ISC_R_SUCCESS)
notify_destroy(notify, ISC_TRUE);
if (!loggednotify) {
notify_log(zone, ISC_LOG_INFO,
"sending notifies (serial %u)",
serial);
loggednotify = ISC_TRUE;
}
notify = NULL;
}
UNLOCK_ZONE(zone);
if (notifytype == dns_notifytype_explicit)
goto cleanup3;
/*
* Process NS RRset to generate notifies.
*/
dns_rdataset_init(&nsrdset);
result = dns_db_findrdataset(zonedb, node, version, dns_rdatatype_ns,
dns_rdatatype_none, 0, &nsrdset, NULL);
if (result != ISC_R_SUCCESS)
goto cleanup3;
result = dns_rdataset_first(&nsrdset);
while (result == ISC_R_SUCCESS) {
dns_rdataset_current(&nsrdset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_reset(&rdata);
/*
* Don't notify the master server unless explicitly
* configured to do so.
*/
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_NOTIFYTOSOA) &&
dns_name_compare(&master, &ns.name) == 0) {
result = dns_rdataset_next(&nsrdset);
continue;
}
if (!loggednotify) {
notify_log(zone, ISC_LOG_INFO,
"sending notifies (serial %u)",
serial);
loggednotify = ISC_TRUE;
}
LOCK_ZONE(zone);
isqueued = notify_isqueued(zone, &ns.name, NULL);
UNLOCK_ZONE(zone);
if (isqueued) {
result = dns_rdataset_next(&nsrdset);
continue;
}
result = notify_create(zone->mctx, flags, &notify);
if (result != ISC_R_SUCCESS)
continue;
dns_zone_iattach(zone, &notify->zone);
result = dns_name_dup(&ns.name, zone->mctx, &notify->ns);
if (result != ISC_R_SUCCESS) {
LOCK_ZONE(zone);
notify_destroy(notify, ISC_TRUE);
UNLOCK_ZONE(zone);
continue;
}
LOCK_ZONE(zone);
ISC_LIST_APPEND(zone->notifies, notify, link);
UNLOCK_ZONE(zone);
notify_find_address(notify);
notify = NULL;
result = dns_rdataset_next(&nsrdset);
}
dns_rdataset_disassociate(&nsrdset);
cleanup3:
if (dns_name_dynamic(&master))
dns_name_free(&master, zone->mctx);
cleanup2:
dns_db_detachnode(zonedb, &node);
cleanup1:
dns_db_closeversion(zonedb, &version, ISC_FALSE);
dns_db_detach(&zonedb);
}
/***
*** Private
***/
static inline isc_result_t
save_nsrrset(dns_message_t *message, dns_name_t *name,
dns_db_t *db, dns_dbversion_t *version)
{
dns_rdataset_t *nsrdataset = NULL;
dns_rdataset_t *rdataset = NULL;
dns_dbnode_t *node = NULL;
dns_rdata_ns_t ns;
isc_result_t result;
dns_rdata_t rdata = DNS_RDATA_INIT;
/*
* Extract NS RRset from message.
*/
result = dns_message_findname(message, DNS_SECTION_ANSWER, name,
dns_rdatatype_ns, dns_rdatatype_none,
NULL, &nsrdataset);
if (result != ISC_R_SUCCESS)
goto fail;
/*
* Add NS rdataset.
*/
result = dns_db_findnode(db, name, ISC_TRUE, &node);
if (result != ISC_R_SUCCESS)
goto fail;
result = dns_db_addrdataset(db, node, version, 0,
nsrdataset, 0, NULL);
dns_db_detachnode(db, &node);
if (result != ISC_R_SUCCESS)
goto fail;
/*
* Add glue rdatasets.
*/
for (result = dns_rdataset_first(nsrdataset);
result == ISC_R_SUCCESS;
result = dns_rdataset_next(nsrdataset)) {
dns_rdataset_current(nsrdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &ns, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
dns_rdata_reset(&rdata);
if (!dns_name_issubdomain(&ns.name, name))
continue;
rdataset = NULL;
result = dns_message_findname(message, DNS_SECTION_ADDITIONAL,
&ns.name, dns_rdatatype_aaaa,
dns_rdatatype_none, NULL,
&rdataset);
if (result == ISC_R_SUCCESS) {
result = dns_db_findnode(db, &ns.name,
ISC_TRUE, &node);
if (result != ISC_R_SUCCESS)
goto fail;
result = dns_db_addrdataset(db, node, version, 0,
rdataset, 0, NULL);
dns_db_detachnode(db, &node);
if (result != ISC_R_SUCCESS)
goto fail;
}
rdataset = NULL;
result = dns_message_findname(message, DNS_SECTION_ADDITIONAL,
&ns.name, dns_rdatatype_a,
dns_rdatatype_none, NULL,
&rdataset);
if (result == ISC_R_SUCCESS) {
result = dns_db_findnode(db, &ns.name,
ISC_TRUE, &node);
if (result != ISC_R_SUCCESS)
goto fail;
result = dns_db_addrdataset(db, node, version, 0,
rdataset, 0, NULL);
dns_db_detachnode(db, &node);
if (result != ISC_R_SUCCESS)
goto fail;
}
}
if (result != ISC_R_NOMORE)
goto fail;
return (ISC_R_SUCCESS);
fail:
return (result);
}
static void
stub_callback(isc_task_t *task, isc_event_t *event) {
const char me[] = "stub_callback";
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_stub_t *stub = NULL;
dns_message_t *msg = NULL;
dns_zone_t *zone = NULL;
char master[ISC_SOCKADDR_FORMATSIZE];
char source[ISC_SOCKADDR_FORMATSIZE];
isc_uint32_t nscnt, cnamecnt;
isc_result_t result;
isc_time_t now;
isc_boolean_t exiting = ISC_FALSE;
isc_interval_t i;
unsigned int j;
stub = revent->ev_arg;
INSIST(DNS_STUB_VALID(stub));
UNUSED(task);
zone = stub->zone;
ENTER;
TIME_NOW(&now);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
zone_debuglog(zone, me, 1, "exiting");
exiting = ISC_TRUE;
goto next_master;
}
isc_sockaddr_format(&zone->masteraddr, master, sizeof(master));
isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source));
if (revent->result != ISC_R_SUCCESS) {
if (revent->result == ISC_R_TIMEDOUT &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
UNLOCK_ZONE(zone);
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refreshing stub: timeout retrying "
" without EDNS master %s (source %s)",
master, source);
goto same_master;
}
dns_zonemgr_unreachableadd(zone->zmgr, &zone->masteraddr,
&zone->sourceaddr, &now);
dns_zone_log(zone, ISC_LOG_INFO,
"could not refresh stub from master %s"
" (source %s): %s", master, source,
dns_result_totext(revent->result));
goto next_master;
}
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg);
if (result != ISC_R_SUCCESS)
goto next_master;
result = dns_request_getresponse(revent->request, msg, 0);
if (result != ISC_R_SUCCESS)
goto next_master;
/*
* Unexpected rcode.
*/
if (msg->rcode != dns_rcode_noerror) {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof(rcode));
(void)dns_rcode_totext(msg->rcode, &rb);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) &&
(msg->rcode == dns_rcode_servfail ||
msg->rcode == dns_rcode_notimp ||
msg->rcode == dns_rcode_formerr)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refreshing stub: rcode (%.*s) retrying "
"without EDNS master %s (source %s)",
(int)rb.used, rcode, master, source);
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
UNLOCK_ZONE(zone);
goto same_master;
}
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: "
"unexpected rcode (%.*s) from %s (source %s)",
(int)rb.used, rcode, master, source);
goto next_master;
}
/*
* We need complete messages.
*/
if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) {
if (dns_request_usedtcp(revent->request)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: truncated TCP "
"response from master %s (source %s)",
master, source);
goto next_master;
}
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEVC);
UNLOCK_ZONE(zone);
goto same_master;
}
/*
* If non-auth log and next master.
*/
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) {
dns_zone_log(zone, ISC_LOG_INFO, "refreshing stub: "
"non-authoritative answer from "
"master %s (source %s)", master, source);
goto next_master;
}
/*
* Sanity checks.
*/
cnamecnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_cname);
nscnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_ns);
if (cnamecnt != 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: unexpected CNAME response "
"from master %s (source %s)", master, source);
goto next_master;
}
if (nscnt == 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: no NS records in response "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* Save answer.
*/
result = save_nsrrset(msg, &zone->origin, stub->db, stub->version);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: unable to save NS records "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* Tidy up.
*/
dns_db_closeversion(stub->db, &stub->version, ISC_TRUE);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
if (zone->db == NULL)
zone_attachdb(zone, stub->db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
dns_db_detach(&stub->db);
if (zone->masterfile != NULL) {
dns_zone_dump(zone);
TIME_NOW(&zone->loadtime);
}
dns_message_destroy(&msg);
isc_event_free(&event);
LOCK_ZONE(zone);
dns_request_destroy(&zone->request);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime);
isc_interval_set(&i, zone->expire, 0);
DNS_ZONE_TIME_ADD(&now, zone->expire, &zone->expiretime);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
goto free_stub;
next_master:
if (stub->version != NULL)
dns_db_closeversion(stub->db, &stub->version, ISC_FALSE);
if (stub->db != NULL)
dns_db_detach(&stub->db);
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
LOCK_ZONE(zone);
dns_request_destroy(&zone->request);
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS);
if (exiting || zone->curmaster >= zone->masterscnt) {
isc_boolean_t done = ISC_TRUE;
if (!exiting &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
/*
* Did we get a good answer from all the masters?
*/
for (j = 0; j < zone->masterscnt; j++)
if (zone->mastersok[j] == ISC_FALSE) {
done = ISC_FALSE;
break;
}
} else
done = ISC_TRUE;
if (!done) {
zone->curmaster = 0;
/*
* Find the next failed master.
*/
while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster])
zone->curmaster++;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
} else {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
goto free_stub;
}
}
queue_soa_query(zone);
UNLOCK_ZONE(zone);
goto free_stub;
same_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
LOCK_ZONE(zone);
dns_request_destroy(&zone->request);
UNLOCK_ZONE(zone);
ns_query(zone, NULL, stub);
goto done;
free_stub:
stub->magic = 0;
dns_zone_idetach(&stub->zone);
INSIST(stub->db == NULL);
INSIST(stub->version == NULL);
isc_mem_put(stub->mctx, stub, sizeof(*stub));
done:
INSIST(event == NULL);
return;
}
/*
* An SOA query has finished (successfully or not).
*/
static void
refresh_callback(isc_task_t *task, isc_event_t *event) {
const char me[] = "refresh_callback";
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_zone_t *zone;
dns_message_t *msg = NULL;
isc_uint32_t soacnt, cnamecnt, soacount, nscount;
isc_time_t now;
char master[ISC_SOCKADDR_FORMATSIZE];
char source[ISC_SOCKADDR_FORMATSIZE];
dns_rdataset_t *rdataset = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdata_soa_t soa;
isc_result_t result;
isc_uint32_t serial, oldserial;
unsigned int j;
zone = revent->ev_arg;
INSIST(DNS_ZONE_VALID(zone));
UNUSED(task);
ENTER;
/*
* if timeout log and next master;
*/
isc_sockaddr_format(&zone->masteraddr, master, sizeof(master));
isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source));
TIME_NOW(&now);
if (revent->result != ISC_R_SUCCESS) {
if (revent->result == ISC_R_TIMEDOUT &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
UNLOCK_ZONE(zone);
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refresh: timeout retrying without EDNS "
"master %s (source %s)", master, source);
goto same_master;
}
if (revent->result == ISC_R_TIMEDOUT &&
!dns_request_usedtcp(revent->request)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: retry limit for "
"master %s exceeded (source %s)",
master, source);
/* Try with slave with TCP. */
if (zone->type == dns_zone_slave &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_TRYTCPREFRESH)) {
if (!dns_zonemgr_unreachable(zone->zmgr,
&zone->masteraddr,
&zone->sourceaddr,
&now)) {
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone,
DNS_ZONEFLG_SOABEFOREAXFR);
UNLOCK_ZONE(zone);
goto tcp_transfer;
}
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refresh: skipped tcp fallback"
"as master %s (source %s) is "
"unreachable (cached)",
master, source);
}
} else
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: failure trying master "
"%s (source %s): %s", master, source,
dns_result_totext(revent->result));
goto next_master;
}
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg);
if (result != ISC_R_SUCCESS)
goto next_master;
result = dns_request_getresponse(revent->request, msg, 0);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: failure trying master "
"%s (source %s): %s", master, source,
dns_result_totext(result));
goto next_master;
}
/*
* Unexpected rcode.
*/
if (msg->rcode != dns_rcode_noerror) {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof(rcode));
(void)dns_rcode_totext(msg->rcode, &rb);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS) &&
(msg->rcode == dns_rcode_servfail ||
msg->rcode == dns_rcode_notimp ||
msg->rcode == dns_rcode_formerr)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"refresh: rcode (%.*s) retrying without "
"EDNS master %s (source %s)",
(int)rb.used, rcode, master, source);
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
UNLOCK_ZONE(zone);
goto same_master;
}
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: unexpected rcode (%.*s) from "
"master %s (source %s)", (int)rb.used, rcode,
master, source);
/*
* Perhaps AXFR/IXFR is allowed even if SOA queries aren't.
*/
if (msg->rcode == dns_rcode_refused &&
zone->type == dns_zone_slave)
goto tcp_transfer;
goto next_master;
}
/*
* If truncated punt to zone transfer which will query again.
*/
if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) {
if (zone->type == dns_zone_slave) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: truncated UDP answer, "
"initiating TCP zone xfer "
"for master %s (source %s)",
master, source);
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR);
UNLOCK_ZONE(zone);
goto tcp_transfer;
} else {
INSIST(zone->type == dns_zone_stub);
if (dns_request_usedtcp(revent->request)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: truncated TCP response "
"from master %s (source %s)",
master, source);
goto next_master;
}
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEVC);
UNLOCK_ZONE(zone);
goto same_master;
}
}
/*
* if non-auth log and next master;
*/
if ((msg->flags & DNS_MESSAGEFLAG_AA) == 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: non-authoritative answer from "
"master %s (source %s)", master, source);
goto next_master;
}
cnamecnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_cname);
soacnt = message_count(msg, DNS_SECTION_ANSWER, dns_rdatatype_soa);
nscount = message_count(msg, DNS_SECTION_AUTHORITY, dns_rdatatype_ns);
soacount = message_count(msg, DNS_SECTION_AUTHORITY,
dns_rdatatype_soa);
/*
* There should not be a CNAME record at top of zone.
*/
if (cnamecnt != 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: CNAME at top of zone "
"in master %s (source %s)", master, source);
goto next_master;
}
/*
* if referral log and next master;
*/
if (soacnt == 0 && soacount == 0 && nscount != 0) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: referral response "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* if nodata log and next master;
*/
if (soacnt == 0 && (nscount == 0 || soacount != 0)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: NODATA response "
"from master %s (source %s)", master, source);
goto next_master;
}
/*
* Only one soa at top of zone.
*/
if (soacnt != 1) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: answer SOA count (%d) != 1 "
"from master %s (source %s)",
soacnt, master, source);
goto next_master;
}
/*
* Extract serial
*/
rdataset = NULL;
result = dns_message_findname(msg, DNS_SECTION_ANSWER, &zone->origin,
dns_rdatatype_soa, dns_rdatatype_none,
NULL, &rdataset);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: unable to get SOA record "
"from master %s (source %s)", master, source);
goto next_master;
}
result = dns_rdataset_first(rdataset);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: dns_rdataset_first() failed");
goto next_master;
}
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
serial = soa.serial;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
result = dns_zone_getserial2(zone, &oldserial);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
zone_debuglog(zone, me, 1, "serial: new %u, old %u",
serial, oldserial);
} else
zone_debuglog(zone, me, 1, "serial: new %u, old not loaded",
serial);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER) ||
isc_serial_gt(serial, oldserial)) {
if (dns_zonemgr_unreachable(zone->zmgr, &zone->masteraddr,
&zone->sourceaddr, &now)) {
dns_zone_log(zone, ISC_LOG_INFO,
"refresh: skipping %s as master %s "
"(source %s) is unreachable (cached)",
zone->type == dns_zone_slave ?
"zone transfer" : "NS query",
master, source);
goto next_master;
}
tcp_transfer:
isc_event_free(&event);
LOCK_ZONE(zone);
dns_request_destroy(&zone->request);
UNLOCK_ZONE(zone);
if (zone->type == dns_zone_slave) {
queue_xfrin(zone);
} else {
INSIST(zone->type == dns_zone_stub);
ns_query(zone, rdataset, NULL);
}
if (msg != NULL)
dns_message_destroy(&msg);
} else if (isc_serial_eq(soa.serial, oldserial)) {
if (zone->masterfile != NULL) {
result = ISC_R_FAILURE;
if (zone->journal != NULL)
result = isc_file_settime(zone->journal, &now);
if (result == ISC_R_SUCCESS &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
result = isc_file_settime(zone->masterfile,
&now);
} else if (result != ISC_R_SUCCESS)
result = isc_file_settime(zone->masterfile,
&now);
/* Someone removed the file from underneath us! */
if (result == ISC_R_FILENOTFOUND) {
LOCK_ZONE(zone);
zone_needdump(zone, DNS_DUMP_DELAY);
UNLOCK_ZONE(zone);
} else if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"refresh: could not set file "
"modification time of '%s': %s",
zone->masterfile,
dns_result_totext(result));
}
DNS_ZONE_JITTER_ADD(&now, zone->refresh, &zone->refreshtime);
DNS_ZONE_TIME_ADD(&now, zone->expire, &zone->expiretime);
zone->mastersok[zone->curmaster] = ISC_TRUE;
goto next_master;
} else {
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_MULTIMASTER))
dns_zone_log(zone, ISC_LOG_INFO, "serial number (%u) "
"received from master %s < ours (%u)",
soa.serial, master, oldserial);
else
zone_debuglog(zone, me, 1, "ahead");
zone->mastersok[zone->curmaster] = ISC_TRUE;
goto next_master;
}
if (msg != NULL)
dns_message_destroy(&msg);
goto detach;
next_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
LOCK_ZONE(zone);
dns_request_destroy(&zone->request);
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NOEDNS);
if (zone->curmaster >= zone->masterscnt) {
isc_boolean_t done = ISC_TRUE;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
/*
* Did we get a good answer from all the masters?
*/
for (j = 0; j < zone->masterscnt; j++)
if (zone->mastersok[j] == ISC_FALSE) {
done = ISC_FALSE;
break;
}
} else
done = ISC_TRUE;
if (!done) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
zone->curmaster = 0;
/*
* Find the next failed master.
*/
while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster])
zone->curmaster++;
goto requeue;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDREFRESH)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDREFRESH);
zone->refreshtime = now;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
zone_settimer(zone, &now);
UNLOCK_ZONE(zone);
goto detach;
}
requeue:
queue_soa_query(zone);
UNLOCK_ZONE(zone);
goto detach;
same_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
LOCK_ZONE(zone);
dns_request_destroy(&zone->request);
queue_soa_query(zone);
UNLOCK_ZONE(zone);
detach:
dns_zone_idetach(&zone);
return;
}
static void
queue_soa_query(dns_zone_t *zone) {
const char me[] = "queue_soa_query";
isc_event_t *e;
dns_zone_t *dummy = NULL;
isc_result_t result;
ENTER;
/*
* Locked by caller
*/
REQUIRE(LOCKED_ZONE(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
cancel_refresh(zone);
return;
}
e = isc_event_allocate(zone->mctx, NULL, DNS_EVENT_ZONE,
soa_query, zone, sizeof(isc_event_t));
if (e == NULL) {
cancel_refresh(zone);
return;
}
/*
* Attach so that we won't clean up
* until the event is delivered.
*/
zone_iattach(zone, &dummy);
e->ev_arg = zone;
e->ev_sender = NULL;
result = isc_ratelimiter_enqueue(zone->zmgr->rl, zone->task, &e);
if (result != ISC_R_SUCCESS) {
zone_idetach(&dummy);
isc_event_free(&e);
cancel_refresh(zone);
}
}
static inline isc_result_t
create_query(dns_zone_t *zone, dns_rdatatype_t rdtype,
dns_message_t **messagep)
{
dns_message_t *message = NULL;
dns_name_t *qname = NULL;
dns_rdataset_t *qrdataset = NULL;
isc_result_t result;
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTRENDER,
&message);
if (result != ISC_R_SUCCESS)
goto cleanup;
message->opcode = dns_opcode_query;
message->rdclass = zone->rdclass;
result = dns_message_gettempname(message, &qname);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_message_gettemprdataset(message, &qrdataset);
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* Make question.
*/
dns_name_init(qname, NULL);
dns_name_clone(&zone->origin, qname);
dns_rdataset_init(qrdataset);
dns_rdataset_makequestion(qrdataset, zone->rdclass, rdtype);
ISC_LIST_APPEND(qname->list, qrdataset, link);
dns_message_addname(message, qname, DNS_SECTION_QUESTION);
*messagep = message;
return (ISC_R_SUCCESS);
cleanup:
if (qname != NULL)
dns_message_puttempname(message, &qname);
if (qrdataset != NULL)
dns_message_puttemprdataset(message, &qrdataset);
if (message != NULL)
dns_message_destroy(&message);
return (result);
}
static isc_result_t
add_opt(dns_message_t *message, isc_uint16_t udpsize, isc_boolean_t reqnsid) {
dns_rdataset_t *rdataset = NULL;
dns_rdatalist_t *rdatalist = NULL;
dns_rdata_t *rdata = NULL;
isc_result_t result;
result = dns_message_gettemprdatalist(message, &rdatalist);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_message_gettemprdata(message, &rdata);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_message_gettemprdataset(message, &rdataset);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_rdataset_init(rdataset);
rdatalist->type = dns_rdatatype_opt;
rdatalist->covers = 0;
/*
* Set Maximum UDP buffer size.
*/
rdatalist->rdclass = udpsize;
/*
* Set EXTENDED-RCODE, VERSION, DO and Z to 0.
*/
rdatalist->ttl = 0;
/* Set EDNS options if applicable */
if (reqnsid) {
unsigned char data[4];
isc_buffer_t buf;
isc_buffer_init(&buf, data, sizeof(data));
isc_buffer_putuint16(&buf, DNS_OPT_NSID);
isc_buffer_putuint16(&buf, 0);
rdata->data = data;
rdata->length = sizeof(data);
} else {
rdata->data = NULL;
rdata->length = 0;
}
rdata->rdclass = rdatalist->rdclass;
rdata->type = rdatalist->type;
rdata->flags = 0;
ISC_LIST_INIT(rdatalist->rdata);
ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
RUNTIME_CHECK(dns_rdatalist_tordataset(rdatalist, rdataset)
== ISC_R_SUCCESS);
return (dns_message_setopt(message, rdataset));
cleanup:
if (rdatalist != NULL)
dns_message_puttemprdatalist(message, &rdatalist);
if (rdataset != NULL)
dns_message_puttemprdataset(message, &rdataset);
if (rdata != NULL)
dns_message_puttemprdata(message, &rdata);
return (result);
}
static void
soa_query(isc_task_t *task, isc_event_t *event) {
const char me[] = "soa_query";
isc_result_t result = ISC_R_FAILURE;
dns_message_t *message = NULL;
dns_zone_t *zone = event->ev_arg;
dns_zone_t *dummy = NULL;
isc_netaddr_t masterip;
dns_tsigkey_t *key = NULL;
isc_uint32_t options;
isc_boolean_t cancel = ISC_TRUE;
int timeout;
isc_boolean_t have_xfrsource, reqnsid;
isc_uint16_t udpsize = SEND_BUFFER_SIZE;
REQUIRE(DNS_ZONE_VALID(zone));
UNUSED(task);
ENTER;
LOCK_ZONE(zone);
if (((event->ev_attributes & ISC_EVENTATTR_CANCELED) != 0) ||
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING) ||
zone->view->requestmgr == NULL) {
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
cancel = ISC_FALSE;
goto cleanup;
}
/*
* XXX Optimisation: Create message when zone is setup and reuse.
*/
result = create_query(zone, dns_rdatatype_soa, &message);
if (result != ISC_R_SUCCESS)
goto cleanup;
again:
INSIST(zone->masterscnt > 0);
INSIST(zone->curmaster < zone->masterscnt);
zone->masteraddr = zone->masters[zone->curmaster];
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
/*
* First, look for a tsig key in the master statement, then
* try for a server key.
*/
if ((zone->masterkeynames != NULL) &&
(zone->masterkeynames[zone->curmaster] != NULL)) {
dns_view_t *view = dns_zone_getview(zone);
dns_name_t *keyname = zone->masterkeynames[zone->curmaster];
result = dns_view_gettsig(view, keyname, &key);
if (result != ISC_R_SUCCESS) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(keyname, namebuf, sizeof(namebuf));
dns_zone_log(zone, ISC_LOG_ERROR,
"unable to find key: %s", namebuf);
goto skip_master;
}
}
if (key == NULL) {
result = dns_view_getpeertsig(zone->view, &masterip, &key);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
char addrbuf[ISC_NETADDR_FORMATSIZE];
isc_netaddr_format(&masterip, addrbuf, sizeof(addrbuf));
dns_zone_log(zone, ISC_LOG_ERROR,
"unable to find TSIG key for %s", addrbuf);
goto skip_master;
}
}
have_xfrsource = ISC_FALSE;
reqnsid = zone->view->requestnsid;
if (zone->view->peers != NULL) {
dns_peer_t *peer = NULL;
isc_boolean_t edns;
result = dns_peerlist_peerbyaddr(zone->view->peers,
&masterip, &peer);
if (result == ISC_R_SUCCESS) {
result = dns_peer_getsupportedns(peer, &edns);
if (result == ISC_R_SUCCESS && !edns)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
result = dns_peer_gettransfersource(peer,
&zone->sourceaddr);
if (result == ISC_R_SUCCESS)
have_xfrsource = ISC_TRUE;
if (zone->view->resolver != NULL)
udpsize =
dns_resolver_getudpsize(zone->view->resolver);
(void)dns_peer_getudpsize(peer, &udpsize);
(void)dns_peer_getrequestnsid(peer, &reqnsid);
}
}
switch (isc_sockaddr_pf(&zone->masteraddr)) {
case PF_INET:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
if (isc_sockaddr_equal(&zone->altxfrsource4,
&zone->xfrsource4))
goto skip_master;
zone->sourceaddr = zone->altxfrsource4;
} else if (!have_xfrsource)
zone->sourceaddr = zone->xfrsource4;
break;
case PF_INET6:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
if (isc_sockaddr_equal(&zone->altxfrsource6,
&zone->xfrsource6))
goto skip_master;
zone->sourceaddr = zone->altxfrsource6;
} else if (!have_xfrsource)
zone->sourceaddr = zone->xfrsource6;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
options = DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEVC) ?
DNS_REQUESTOPT_TCP : 0;
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
result = add_opt(message, udpsize, reqnsid);
if (result != ISC_R_SUCCESS)
zone_debuglog(zone, me, 1,
"unable to add opt record: %s",
dns_result_totext(result));
}
zone_iattach(zone, &dummy);
timeout = 15;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH))
timeout = 30;
result = dns_request_createvia2(zone->view->requestmgr, message,
&zone->sourceaddr, &zone->masteraddr,
options, key, timeout * 3, timeout,
zone->task, refresh_callback, zone,
&zone->request);
if (result != ISC_R_SUCCESS) {
zone_idetach(&dummy);
zone_debuglog(zone, me, 1,
"dns_request_createvia2() failed: %s",
dns_result_totext(result));
goto cleanup;
} else {
if (isc_sockaddr_pf(&zone->masteraddr) == PF_INET)
inc_stats(zone, dns_zonestatscounter_soaoutv4);
else
inc_stats(zone, dns_zonestatscounter_soaoutv6);
}
cancel = ISC_FALSE;
cleanup:
if (key != NULL)
dns_tsigkey_detach(&key);
if (result != ISC_R_SUCCESS)
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
if (message != NULL)
dns_message_destroy(&message);
if (cancel)
cancel_refresh(zone);
isc_event_free(&event);
UNLOCK_ZONE(zone);
dns_zone_idetach(&zone);
return;
skip_master:
if (key != NULL)
dns_tsigkey_detach(&key);
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
if (zone->curmaster < zone->masterscnt)
goto again;
zone->curmaster = 0;
goto cleanup;
}
static void
ns_query(dns_zone_t *zone, dns_rdataset_t *soardataset, dns_stub_t *stub) {
const char me[] = "ns_query";
isc_result_t result;
dns_message_t *message = NULL;
isc_netaddr_t masterip;
dns_tsigkey_t *key = NULL;
dns_dbnode_t *node = NULL;
int timeout;
isc_boolean_t have_xfrsource = ISC_FALSE, reqnsid;
isc_uint16_t udpsize = SEND_BUFFER_SIZE;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE((soardataset != NULL && stub == NULL) ||
(soardataset == NULL && stub != NULL));
REQUIRE(stub == NULL || DNS_STUB_VALID(stub));
ENTER;
LOCK_ZONE(zone);
if (stub == NULL) {
stub = isc_mem_get(zone->mctx, sizeof(*stub));
if (stub == NULL)
goto cleanup;
stub->magic = STUB_MAGIC;
stub->mctx = zone->mctx;
stub->zone = NULL;
stub->db = NULL;
stub->version = NULL;
/*
* Attach so that the zone won't disappear from under us.
*/
zone_iattach(zone, &stub->zone);
/*
* If a db exists we will update it, otherwise we create a
* new one and attach it to the zone once we have the NS
* RRset and glue.
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL) {
dns_db_attach(zone->db, &stub->db);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
} else {
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
INSIST(zone->db_argc >= 1);
result = dns_db_create(zone->mctx, zone->db_argv[0],
&zone->origin, dns_dbtype_stub,
zone->rdclass,
zone->db_argc - 1,
zone->db_argv + 1,
&stub->db);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"refreshing stub: "
"could not create "
"database: %s",
dns_result_totext(result));
goto cleanup;
}
dns_db_settask(stub->db, zone->task);
}
dns_db_newversion(stub->db, &stub->version);
/*
* Update SOA record.
*/
result = dns_db_findnode(stub->db, &zone->origin, ISC_TRUE,
&node);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: "
"dns_db_findnode() failed: %s",
dns_result_totext(result));
goto cleanup;
}
result = dns_db_addrdataset(stub->db, node, stub->version, 0,
soardataset, 0, NULL);
dns_db_detachnode(stub->db, &node);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"refreshing stub: "
"dns_db_addrdataset() failed: %s",
dns_result_totext(result));
goto cleanup;
}
}
/*
* XXX Optimisation: Create message when zone is setup and reuse.
*/
result = create_query(zone, dns_rdatatype_ns, &message);
INSIST(zone->masterscnt > 0);
INSIST(zone->curmaster < zone->masterscnt);
zone->masteraddr = zone->masters[zone->curmaster];
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
/*
* First, look for a tsig key in the master statement, then
* try for a server key.
*/
if ((zone->masterkeynames != NULL) &&
(zone->masterkeynames[zone->curmaster] != NULL)) {
dns_view_t *view = dns_zone_getview(zone);
dns_name_t *keyname = zone->masterkeynames[zone->curmaster];
result = dns_view_gettsig(view, keyname, &key);
if (result != ISC_R_SUCCESS) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(keyname, namebuf, sizeof(namebuf));
dns_zone_log(zone, ISC_LOG_ERROR,
"unable to find key: %s", namebuf);
}
}
if (key == NULL)
(void)dns_view_getpeertsig(zone->view, &masterip, &key);
reqnsid = zone->view->requestnsid;
if (zone->view->peers != NULL) {
dns_peer_t *peer = NULL;
isc_boolean_t edns;
result = dns_peerlist_peerbyaddr(zone->view->peers,
&masterip, &peer);
if (result == ISC_R_SUCCESS) {
result = dns_peer_getsupportedns(peer, &edns);
if (result == ISC_R_SUCCESS && !edns)
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOEDNS);
result = dns_peer_gettransfersource(peer,
&zone->sourceaddr);
if (result == ISC_R_SUCCESS)
have_xfrsource = ISC_TRUE;
if (zone->view->resolver != NULL)
udpsize =
dns_resolver_getudpsize(zone->view->resolver);
(void)dns_peer_getudpsize(peer, &udpsize);
(void)dns_peer_getrequestnsid(peer, &reqnsid);
}
}
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOEDNS)) {
result = add_opt(message, udpsize, reqnsid);
if (result != ISC_R_SUCCESS)
zone_debuglog(zone, me, 1,
"unable to add opt record: %s",
dns_result_totext(result));
}
/*
* Always use TCP so that we shouldn't truncate in additional section.
*/
switch (isc_sockaddr_pf(&zone->masteraddr)) {
case PF_INET:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC))
zone->sourceaddr = zone->altxfrsource4;
else if (!have_xfrsource)
zone->sourceaddr = zone->xfrsource4;
break;
case PF_INET6:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC))
zone->sourceaddr = zone->altxfrsource6;
else if (!have_xfrsource)
zone->sourceaddr = zone->xfrsource6;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
timeout = 15;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH))
timeout = 30;
result = dns_request_createvia2(zone->view->requestmgr, message,
&zone->sourceaddr, &zone->masteraddr,
DNS_REQUESTOPT_TCP, key, timeout * 3,
timeout, zone->task, stub_callback,
stub, &zone->request);
if (result != ISC_R_SUCCESS) {
zone_debuglog(zone, me, 1,
"dns_request_createvia() failed: %s",
dns_result_totext(result));
goto cleanup;
}
dns_message_destroy(&message);
goto unlock;
cleanup:
cancel_refresh(zone);
if (stub != NULL) {
stub->magic = 0;
if (stub->version != NULL)
dns_db_closeversion(stub->db, &stub->version,
ISC_FALSE);
if (stub->db != NULL)
dns_db_detach(&stub->db);
if (stub->zone != NULL)
zone_idetach(&stub->zone);
isc_mem_put(stub->mctx, stub, sizeof(*stub));
}
if (message != NULL)
dns_message_destroy(&message);
unlock:
if (key != NULL)
dns_tsigkey_detach(&key);
UNLOCK_ZONE(zone);
return;
}
/*
* Handle the control event. Note that although this event causes the zone
* to shut down, it is not a shutdown event in the sense of the task library.
*/
static void
zone_shutdown(isc_task_t *task, isc_event_t *event) {
dns_zone_t *zone = (dns_zone_t *) event->ev_arg;
isc_boolean_t free_needed, linked = ISC_FALSE;
UNUSED(task);
REQUIRE(DNS_ZONE_VALID(zone));
INSIST(event->ev_type == DNS_EVENT_ZONECONTROL);
INSIST(isc_refcount_current(&zone->erefs) == 0);
zone_debuglog(zone, "zone_shutdown", 3, "shutting down");
/*
* Stop things being restarted after we cancel them below.
*/
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_EXITING);
UNLOCK_ZONE(zone);
/*
* If we were waiting for xfrin quota, step out of
* the queue.
* If there's no zone manager, we can't be waiting for the
* xfrin quota
*/
if (zone->zmgr != NULL) {
RWLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
if (zone->statelist == &zone->zmgr->waiting_for_xfrin) {
ISC_LIST_UNLINK(zone->zmgr->waiting_for_xfrin, zone,
statelink);
linked = ISC_TRUE;
zone->statelist = NULL;
}
RWUNLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
}
/*
* In task context, no locking required. See zone_xfrdone().
*/
if (zone->xfr != NULL)
dns_xfrin_shutdown(zone->xfr);
LOCK_ZONE(zone);
if (linked) {
INSIST(zone->irefs > 0);
zone->irefs--;
}
if (zone->request != NULL) {
dns_request_cancel(zone->request);
}
if (zone->readio != NULL)
zonemgr_cancelio(zone->readio);
if (zone->lctx != NULL)
dns_loadctx_cancel(zone->lctx);
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FLUSH) ||
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
if (zone->writeio != NULL)
zonemgr_cancelio(zone->writeio);
if (zone->dctx != NULL)
dns_dumpctx_cancel(zone->dctx);
}
notify_cancel(zone);
if (zone->timer != NULL) {
isc_timer_detach(&zone->timer);
INSIST(zone->irefs > 0);
zone->irefs--;
}
if (zone->view != NULL)
dns_view_weakdetach(&zone->view);
/*
* We have now canceled everything set the flag to allow exit_check()
* to succeed. We must not unlock between setting this flag and
* calling exit_check().
*/
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_SHUTDOWN);
free_needed = exit_check(zone);
UNLOCK_ZONE(zone);
if (free_needed)
zone_free(zone);
}
static void
zone_timer(isc_task_t *task, isc_event_t *event) {
const char me[] = "zone_timer";
dns_zone_t *zone = (dns_zone_t *)event->ev_arg;
UNUSED(task);
REQUIRE(DNS_ZONE_VALID(zone));
ENTER;
zone_maintenance(zone);
isc_event_free(&event);
}
static void
zone_settimer(dns_zone_t *zone, isc_time_t *now) {
const char me[] = "zone_settimer";
isc_time_t next;
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
return;
isc_time_settoepoch(&next);
switch (zone->type) {
case dns_zone_master:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY))
next = zone->notifytime;
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
INSIST(!isc_time_isepoch(&zone->dumptime));
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->dumptime, &next) < 0)
next = zone->dumptime;
}
if (!isc_time_isepoch(&zone->resigntime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->resigntime, &next) < 0)
next = zone->resigntime;
}
if (!isc_time_isepoch(&zone->keywarntime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->keywarntime, &next) < 0)
next = zone->keywarntime;
}
if (!isc_time_isepoch(&zone->signingtime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->signingtime, &next) < 0)
next = zone->signingtime;
}
if (!isc_time_isepoch(&zone->nsec3chaintime)) {
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->nsec3chaintime, &next) < 0)
next = zone->nsec3chaintime;
}
break;
case dns_zone_slave:
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDNOTIFY))
next = zone->notifytime;
/*FALLTHROUGH*/
case dns_zone_stub:
if (!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOMASTERS) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOREFRESH) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADING)) {
INSIST(!isc_time_isepoch(&zone->refreshtime));
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->refreshtime, &next) < 0)
next = zone->refreshtime;
}
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED)) {
INSIST(!isc_time_isepoch(&zone->expiretime));
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->expiretime, &next) < 0)
next = zone->expiretime;
}
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDDUMP) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DUMPING)) {
INSIST(!isc_time_isepoch(&zone->dumptime));
if (isc_time_isepoch(&next) ||
isc_time_compare(&zone->dumptime, &next) < 0)
next = zone->dumptime;
}
break;
default:
break;
}
if (isc_time_isepoch(&next)) {
zone_debuglog(zone, me, 10, "settimer inactive");
result = isc_timer_reset(zone->timer, isc_timertype_inactive,
NULL, NULL, ISC_TRUE);
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"could not deactivate zone timer: %s",
isc_result_totext(result));
} else {
if (isc_time_compare(&next, now) <= 0)
next = *now;
result = isc_timer_reset(zone->timer, isc_timertype_once,
&next, NULL, ISC_TRUE);
if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"could not reset zone timer: %s",
isc_result_totext(result));
}
}
static void
cancel_refresh(dns_zone_t *zone) {
const char me[] = "cancel_refresh";
isc_time_t now;
/*
* 'zone' locked by caller.
*/
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
ENTER;
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
TIME_NOW(&now);
zone_settimer(zone, &now);
}
static isc_result_t
notify_createmessage(dns_zone_t *zone, unsigned int flags,
dns_message_t **messagep)
{
dns_db_t *zonedb = NULL;
dns_dbnode_t *node = NULL;
dns_dbversion_t *version = NULL;
dns_message_t *message = NULL;
dns_rdataset_t rdataset;
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_name_t *tempname = NULL;
dns_rdata_t *temprdata = NULL;
dns_rdatalist_t *temprdatalist = NULL;
dns_rdataset_t *temprdataset = NULL;
isc_result_t result;
isc_region_t r;
isc_buffer_t *b = NULL;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(messagep != NULL && *messagep == NULL);
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTRENDER,
&message);
if (result != ISC_R_SUCCESS)
return (result);
message->opcode = dns_opcode_notify;
message->flags |= DNS_MESSAGEFLAG_AA;
message->rdclass = zone->rdclass;
result = dns_message_gettempname(message, &tempname);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = dns_message_gettemprdataset(message, &temprdataset);
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* Make question.
*/
dns_name_init(tempname, NULL);
dns_name_clone(&zone->origin, tempname);
dns_rdataset_init(temprdataset);
dns_rdataset_makequestion(temprdataset, zone->rdclass,
dns_rdatatype_soa);
ISC_LIST_APPEND(tempname->list, temprdataset, link);
dns_message_addname(message, tempname, DNS_SECTION_QUESTION);
tempname = NULL;
temprdataset = NULL;
if ((flags & DNS_NOTIFY_NOSOA) != 0)
goto done;
result = dns_message_gettempname(message, &tempname);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_message_gettemprdata(message, &temprdata);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_message_gettemprdataset(message, &temprdataset);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_message_gettemprdatalist(message, &temprdatalist);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
INSIST(zone->db != NULL); /* XXXJT: is this assumption correct? */
dns_db_attach(zone->db, &zonedb);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
dns_name_init(tempname, NULL);
dns_name_clone(&zone->origin, tempname);
dns_db_currentversion(zonedb, &version);
result = dns_db_findnode(zonedb, tempname, ISC_FALSE, &node);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
dns_rdataset_init(&rdataset);
result = dns_db_findrdataset(zonedb, node, version,
dns_rdatatype_soa,
dns_rdatatype_none, 0, &rdataset,
NULL);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
result = dns_rdataset_first(&rdataset);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
dns_rdataset_current(&rdataset, &rdata);
dns_rdata_toregion(&rdata, &r);
result = isc_buffer_allocate(zone->mctx, &b, r.length);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
isc_buffer_putmem(b, r.base, r.length);
isc_buffer_usedregion(b, &r);
dns_rdata_init(temprdata);
dns_rdata_fromregion(temprdata, rdata.rdclass, rdata.type, &r);
dns_message_takebuffer(message, &b);
result = dns_rdataset_next(&rdataset);
dns_rdataset_disassociate(&rdataset);
if (result != ISC_R_NOMORE)
goto soa_cleanup;
temprdatalist->rdclass = rdata.rdclass;
temprdatalist->type = rdata.type;
temprdatalist->covers = 0;
temprdatalist->ttl = rdataset.ttl;
ISC_LIST_INIT(temprdatalist->rdata);
ISC_LIST_APPEND(temprdatalist->rdata, temprdata, link);
dns_rdataset_init(temprdataset);
result = dns_rdatalist_tordataset(temprdatalist, temprdataset);
if (result != ISC_R_SUCCESS)
goto soa_cleanup;
ISC_LIST_APPEND(tempname->list, temprdataset, link);
dns_message_addname(message, tempname, DNS_SECTION_ANSWER);
temprdatalist = NULL;
temprdataset = NULL;
temprdata = NULL;
tempname = NULL;
soa_cleanup:
if (node != NULL)
dns_db_detachnode(zonedb, &node);
if (version != NULL)
dns_db_closeversion(zonedb, &version, ISC_FALSE);
if (zonedb != NULL)
dns_db_detach(&zonedb);
if (tempname != NULL)
dns_message_puttempname(message, &tempname);
if (temprdata != NULL)
dns_message_puttemprdata(message, &temprdata);
if (temprdataset != NULL)
dns_message_puttemprdataset(message, &temprdataset);
if (temprdatalist != NULL)
dns_message_puttemprdatalist(message, &temprdatalist);
done:
*messagep = message;
return (ISC_R_SUCCESS);
cleanup:
if (tempname != NULL)
dns_message_puttempname(message, &tempname);
if (temprdataset != NULL)
dns_message_puttemprdataset(message, &temprdataset);
dns_message_destroy(&message);
return (result);
}
isc_result_t
dns_zone_notifyreceive(dns_zone_t *zone, isc_sockaddr_t *from,
dns_message_t *msg)
{
unsigned int i;
dns_rdata_soa_t soa;
dns_rdataset_t *rdataset = NULL;
dns_rdata_t rdata = DNS_RDATA_INIT;
isc_result_t result;
char fromtext[ISC_SOCKADDR_FORMATSIZE];
int match = 0;
isc_netaddr_t netaddr;
REQUIRE(DNS_ZONE_VALID(zone));
/*
* If type != T_SOA return DNS_R_REFUSED. We don't yet support
* ROLLOVER.
*
* SOA: RFC1996
* Check that 'from' is a valid notify source, (zone->masters).
* Return DNS_R_REFUSED if not.
*
* If the notify message contains a serial number check it
* against the zones serial and return if <= current serial
*
* If a refresh check is progress, if so just record the
* fact we received a NOTIFY and from where and return.
* We will perform a new refresh check when the current one
* completes. Return ISC_R_SUCCESS.
*
* Otherwise initiate a refresh check using 'from' as the
* first address to check. Return ISC_R_SUCCESS.
*/
isc_sockaddr_format(from, fromtext, sizeof(fromtext));
/*
* We only handle NOTIFY (SOA) at the present.
*/
LOCK_ZONE(zone);
if (isc_sockaddr_pf(from) == PF_INET)
inc_stats(zone, dns_zonestatscounter_notifyinv4);
else
inc_stats(zone, dns_zonestatscounter_notifyinv6);
if (msg->counts[DNS_SECTION_QUESTION] == 0 ||
dns_message_findname(msg, DNS_SECTION_QUESTION, &zone->origin,
dns_rdatatype_soa, dns_rdatatype_none,
NULL, NULL) != ISC_R_SUCCESS) {
UNLOCK_ZONE(zone);
if (msg->counts[DNS_SECTION_QUESTION] == 0) {
dns_zone_log(zone, ISC_LOG_NOTICE,
"NOTIFY with no "
"question section from: %s", fromtext);
return (DNS_R_FORMERR);
}
dns_zone_log(zone, ISC_LOG_NOTICE,
"NOTIFY zone does not match");
return (DNS_R_NOTIMP);
}
/*
* If we are a master zone just succeed.
*/
if (zone->type == dns_zone_master) {
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
isc_netaddr_fromsockaddr(&netaddr, from);
for (i = 0; i < zone->masterscnt; i++) {
if (isc_sockaddr_eqaddr(from, &zone->masters[i]))
break;
if (zone->view->aclenv.match_mapped &&
IN6_IS_ADDR_V4MAPPED(&from->type.sin6.sin6_addr) &&
isc_sockaddr_pf(&zone->masters[i]) == AF_INET) {
isc_netaddr_t na1, na2;
isc_netaddr_fromv4mapped(&na1, &netaddr);
isc_netaddr_fromsockaddr(&na2, &zone->masters[i]);
if (isc_netaddr_equal(&na1, &na2))
break;
}
}
/*
* Accept notify requests from non masters if they are on
* 'zone->notify_acl'.
*/
if (i >= zone->masterscnt && zone->notify_acl != NULL &&
dns_acl_match(&netaddr, NULL, zone->notify_acl,
&zone->view->aclenv,
&match, NULL) == ISC_R_SUCCESS &&
match > 0)
{
/* Accept notify. */
} else if (i >= zone->masterscnt) {
UNLOCK_ZONE(zone);
dns_zone_log(zone, ISC_LOG_INFO,
"refused notify from non-master: %s", fromtext);
inc_stats(zone, dns_zonestatscounter_notifyrej);
return (DNS_R_REFUSED);
}
/*
* If the zone is loaded and there are answers check the serial
* to see if we need to do a refresh. Do not worry about this
* check if we are a dialup zone as we use the notify request
* to trigger a refresh check.
*/
if (msg->counts[DNS_SECTION_ANSWER] > 0 &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_LOADED) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NOREFRESH)) {
result = dns_message_findname(msg, DNS_SECTION_ANSWER,
&zone->origin,
dns_rdatatype_soa,
dns_rdatatype_none, NULL,
&rdataset);
if (result == ISC_R_SUCCESS)
result = dns_rdataset_first(rdataset);
if (result == ISC_R_SUCCESS) {
isc_uint32_t serial = 0, oldserial;
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &soa, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
serial = soa.serial;
/*
* The following should safely be performed without DB
* lock and succeed in this context.
*/
result = zone_get_from_db(zone, zone->db, NULL, NULL,
&oldserial, NULL, NULL, NULL,
NULL, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (isc_serial_le(serial, oldserial)) {
dns_zone_log(zone, ISC_LOG_INFO,
"notify from %s: "
"zone is up to date",
fromtext);
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
}
}
/*
* If we got this far and there was a refresh in progress just
* let it complete. Record where we got the notify from so we
* can perform a refresh check when the current one completes
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH)) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDREFRESH);
zone->notifyfrom = *from;
UNLOCK_ZONE(zone);
dns_zone_log(zone, ISC_LOG_INFO,
"notify from %s: refresh in progress, "
"refresh check queued",
fromtext);
return (ISC_R_SUCCESS);
}
zone->notifyfrom = *from;
UNLOCK_ZONE(zone);
dns_zone_refresh(zone);
return (ISC_R_SUCCESS);
}
void
dns_zone_setnotifyacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->notify_acl != NULL)
dns_acl_detach(&zone->notify_acl);
dns_acl_attach(acl, &zone->notify_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setqueryacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->query_acl != NULL)
dns_acl_detach(&zone->query_acl);
dns_acl_attach(acl, &zone->query_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setqueryonacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->queryon_acl != NULL)
dns_acl_detach(&zone->queryon_acl);
dns_acl_attach(acl, &zone->queryon_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setupdateacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->update_acl != NULL)
dns_acl_detach(&zone->update_acl);
dns_acl_attach(acl, &zone->update_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setforwardacl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->forward_acl != NULL)
dns_acl_detach(&zone->forward_acl);
dns_acl_attach(acl, &zone->forward_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_setxfracl(dns_zone_t *zone, dns_acl_t *acl) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->xfr_acl != NULL)
dns_acl_detach(&zone->xfr_acl);
dns_acl_attach(acl, &zone->xfr_acl);
UNLOCK_ZONE(zone);
}
dns_acl_t *
dns_zone_getnotifyacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->notify_acl);
}
dns_acl_t *
dns_zone_getqueryacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->query_acl);
}
dns_acl_t *
dns_zone_getqueryonacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->queryon_acl);
}
dns_acl_t *
dns_zone_getupdateacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->update_acl);
}
dns_acl_t *
dns_zone_getforwardacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->forward_acl);
}
dns_acl_t *
dns_zone_getxfracl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->xfr_acl);
}
void
dns_zone_clearupdateacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->update_acl != NULL)
dns_acl_detach(&zone->update_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearforwardacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->forward_acl != NULL)
dns_acl_detach(&zone->forward_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearnotifyacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->notify_acl != NULL)
dns_acl_detach(&zone->notify_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearqueryacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->query_acl != NULL)
dns_acl_detach(&zone->query_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearqueryonacl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->queryon_acl != NULL)
dns_acl_detach(&zone->queryon_acl);
UNLOCK_ZONE(zone);
}
void
dns_zone_clearxfracl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->xfr_acl != NULL)
dns_acl_detach(&zone->xfr_acl);
UNLOCK_ZONE(zone);
}
isc_boolean_t
dns_zone_getupdatedisabled(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->update_disabled);
}
void
dns_zone_setupdatedisabled(dns_zone_t *zone, isc_boolean_t state) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->update_disabled = state;
}
isc_boolean_t
dns_zone_getzeronosoattl(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->zero_no_soa_ttl);
}
void
dns_zone_setzeronosoattl(dns_zone_t *zone, isc_boolean_t state) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->zero_no_soa_ttl = state;
}
void
dns_zone_setchecknames(dns_zone_t *zone, dns_severity_t severity) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->check_names = severity;
}
dns_severity_t
dns_zone_getchecknames(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->check_names);
}
void
dns_zone_setjournalsize(dns_zone_t *zone, isc_int32_t size) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->journalsize = size;
}
isc_int32_t
dns_zone_getjournalsize(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->journalsize);
}
static void
zone_namerd_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_result_t result = ISC_R_FAILURE;
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, length - 1);
if (dns_name_dynamic(&zone->origin))
result = dns_name_totext(&zone->origin, ISC_TRUE, &buffer);
if (result != ISC_R_SUCCESS &&
isc_buffer_availablelength(&buffer) >= (sizeof("<UNKNOWN>") - 1))
isc_buffer_putstr(&buffer, "<UNKNOWN>");
if (isc_buffer_availablelength(&buffer) > 0)
isc_buffer_putstr(&buffer, "/");
(void)dns_rdataclass_totext(zone->rdclass, &buffer);
if (zone->view != NULL && strcmp(zone->view->name, "_bind") != 0 &&
strcmp(zone->view->name, "_default") != 0 &&
strlen(zone->view->name) < isc_buffer_availablelength(&buffer)) {
isc_buffer_putstr(&buffer, "/");
isc_buffer_putstr(&buffer, zone->view->name);
}
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
static void
zone_name_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_result_t result = ISC_R_FAILURE;
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, length - 1);
if (dns_name_dynamic(&zone->origin))
result = dns_name_totext(&zone->origin, ISC_TRUE, &buffer);
if (result != ISC_R_SUCCESS &&
isc_buffer_availablelength(&buffer) >= (sizeof("<UNKNOWN>") - 1))
isc_buffer_putstr(&buffer, "<UNKNOWN>");
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
static void
zone_rdclass_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, length - 1);
(void)dns_rdataclass_totext(zone->rdclass, &buffer);
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
static void
zone_viewname_tostr(dns_zone_t *zone, char *buf, size_t length) {
isc_buffer_t buffer;
REQUIRE(buf != NULL);
REQUIRE(length > 1U);
/*
* Leave space for terminating '\0'.
*/
isc_buffer_init(&buffer, buf, length - 1);
if (zone->view == NULL) {
isc_buffer_putstr(&buffer, "_none");
} else if (strlen(zone->view->name)
< isc_buffer_availablelength(&buffer)) {
isc_buffer_putstr(&buffer, zone->view->name);
} else {
isc_buffer_putstr(&buffer, "_toolong");
}
buf[isc_buffer_usedlength(&buffer)] = '\0';
}
void
dns_zone_name(dns_zone_t *zone, char *buf, size_t length) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(buf != NULL);
zone_namerd_tostr(zone, buf, length);
}
static void
notify_log(dns_zone_t *zone, int level, const char *fmt, ...) {
va_list ap;
char message[4096];
if (isc_log_wouldlog(dns_lctx, level) == ISC_FALSE)
return;
va_start(ap, fmt);
vsnprintf(message, sizeof(message), fmt, ap);
va_end(ap);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_NOTIFY, DNS_LOGMODULE_ZONE,
level, "zone %s: %s", zone->strnamerd, message);
}
void
dns_zone_logc(dns_zone_t *zone, isc_logcategory_t *category,
int level, const char *fmt, ...) {
va_list ap;
char message[4096];
if (isc_log_wouldlog(dns_lctx, level) == ISC_FALSE)
return;
va_start(ap, fmt);
vsnprintf(message, sizeof(message), fmt, ap);
va_end(ap);
isc_log_write(dns_lctx, category, DNS_LOGMODULE_ZONE,
level, "zone %s: %s", zone->strnamerd, message);
}
void
dns_zone_log(dns_zone_t *zone, int level, const char *fmt, ...) {
va_list ap;
char message[4096];
if (isc_log_wouldlog(dns_lctx, level) == ISC_FALSE)
return;
va_start(ap, fmt);
vsnprintf(message, sizeof(message), fmt, ap);
va_end(ap);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, DNS_LOGMODULE_ZONE,
level, "zone %s: %s", zone->strnamerd, message);
}
static void
zone_debuglog(dns_zone_t *zone, const char *me, int debuglevel,
const char *fmt, ...)
{
va_list ap;
char message[4096];
int level = ISC_LOG_DEBUG(debuglevel);
if (isc_log_wouldlog(dns_lctx, level) == ISC_FALSE)
return;
va_start(ap, fmt);
vsnprintf(message, sizeof(message), fmt, ap);
va_end(ap);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL, DNS_LOGMODULE_ZONE,
level, "%s: zone %s: %s", me, zone->strnamerd, message);
}
static int
message_count(dns_message_t *msg, dns_section_t section, dns_rdatatype_t type)
{
isc_result_t result;
dns_name_t *name;
dns_rdataset_t *curr;
int count = 0;
result = dns_message_firstname(msg, section);
while (result == ISC_R_SUCCESS) {
name = NULL;
dns_message_currentname(msg, section, &name);
for (curr = ISC_LIST_TAIL(name->list); curr != NULL;
curr = ISC_LIST_PREV(curr, link)) {
if (curr->type == type)
count++;
}
result = dns_message_nextname(msg, section);
}
return (count);
}
void
dns_zone_setmaxxfrin(dns_zone_t *zone, isc_uint32_t maxxfrin) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->maxxfrin = maxxfrin;
}
isc_uint32_t
dns_zone_getmaxxfrin(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->maxxfrin);
}
void
dns_zone_setmaxxfrout(dns_zone_t *zone, isc_uint32_t maxxfrout) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->maxxfrout = maxxfrout;
}
isc_uint32_t
dns_zone_getmaxxfrout(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->maxxfrout);
}
dns_zonetype_t
dns_zone_gettype(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->type);
}
dns_name_t *
dns_zone_getorigin(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (&zone->origin);
}
void
dns_zone_settask(dns_zone_t *zone, isc_task_t *task) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->task != NULL)
isc_task_detach(&zone->task);
isc_task_attach(task, &zone->task);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db != NULL)
dns_db_settask(zone->db, zone->task);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
UNLOCK_ZONE(zone);
}
void
dns_zone_gettask(dns_zone_t *zone, isc_task_t **target) {
REQUIRE(DNS_ZONE_VALID(zone));
isc_task_attach(zone->task, target);
}
void
dns_zone_setidlein(dns_zone_t *zone, isc_uint32_t idlein) {
REQUIRE(DNS_ZONE_VALID(zone));
if (idlein == 0)
idlein = DNS_DEFAULT_IDLEIN;
zone->idlein = idlein;
}
isc_uint32_t
dns_zone_getidlein(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->idlein);
}
void
dns_zone_setidleout(dns_zone_t *zone, isc_uint32_t idleout) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->idleout = idleout;
}
isc_uint32_t
dns_zone_getidleout(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->idleout);
}
static void
notify_done(isc_task_t *task, isc_event_t *event) {
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_notify_t *notify;
isc_result_t result;
dns_message_t *message = NULL;
isc_buffer_t buf;
char rcode[128];
char addrbuf[ISC_SOCKADDR_FORMATSIZE];
UNUSED(task);
notify = event->ev_arg;
REQUIRE(DNS_NOTIFY_VALID(notify));
INSIST(task == notify->zone->task);
isc_buffer_init(&buf, rcode, sizeof(rcode));
isc_sockaddr_format(&notify->dst, addrbuf, sizeof(addrbuf));
result = revent->result;
if (result == ISC_R_SUCCESS)
result = dns_message_create(notify->zone->mctx,
DNS_MESSAGE_INTENTPARSE, &message);
if (result == ISC_R_SUCCESS)
result = dns_request_getresponse(revent->request, message,
DNS_MESSAGEPARSE_PRESERVEORDER);
if (result == ISC_R_SUCCESS)
result = dns_rcode_totext(message->rcode, &buf);
if (result == ISC_R_SUCCESS)
notify_log(notify->zone, ISC_LOG_DEBUG(3),
"notify response from %s: %.*s",
addrbuf, (int)buf.used, rcode);
else
notify_log(notify->zone, ISC_LOG_DEBUG(2),
"notify to %s failed: %s", addrbuf,
dns_result_totext(result));
/*
* Old bind's return formerr if they see a soa record. Retry w/o
* the soa if we see a formerr and had sent a SOA.
*/
isc_event_free(&event);
if (message != NULL && message->rcode == dns_rcode_formerr &&
(notify->flags & DNS_NOTIFY_NOSOA) == 0) {
notify->flags |= DNS_NOTIFY_NOSOA;
dns_request_destroy(&notify->request);
result = notify_send_queue(notify);
if (result != ISC_R_SUCCESS)
notify_destroy(notify, ISC_FALSE);
} else {
if (result == ISC_R_TIMEDOUT)
notify_log(notify->zone, ISC_LOG_DEBUG(1),
"notify to %s: retries exceeded", addrbuf);
notify_destroy(notify, ISC_FALSE);
}
if (message != NULL)
dns_message_destroy(&message);
}
isc_result_t
dns_zone_replacedb(dns_zone_t *zone, dns_db_t *db, isc_boolean_t dump) {
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_write);
result = zone_replacedb(zone, db, dump);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_write);
UNLOCK_ZONE(zone);
return (result);
}
static isc_result_t
zone_replacedb(dns_zone_t *zone, dns_db_t *db, isc_boolean_t dump) {
dns_dbversion_t *ver;
isc_result_t result;
unsigned int soacount = 0;
unsigned int nscount = 0;
/*
* 'zone' and 'zonedb' locked by caller.
*/
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(LOCKED_ZONE(zone));
result = zone_get_from_db(zone, db, &nscount, &soacount,
NULL, NULL, NULL, NULL, NULL, NULL);
if (result == ISC_R_SUCCESS) {
if (soacount != 1) {
dns_zone_log(zone, ISC_LOG_ERROR,
"has %d SOA records", soacount);
result = DNS_R_BADZONE;
}
if (nscount == 0) {
dns_zone_log(zone, ISC_LOG_ERROR, "has no NS records");
result = DNS_R_BADZONE;
}
if (result != ISC_R_SUCCESS)
return (result);
} else {
dns_zone_log(zone, ISC_LOG_ERROR,
"retrieving SOA and NS records failed: %s",
dns_result_totext(result));
return (result);
}
result = check_nsec3param(zone, db);
if (result != ISC_R_SUCCESS)
return (result);
ver = NULL;
dns_db_currentversion(db, &ver);
/*
* The initial version of a slave zone is always dumped;
* subsequent versions may be journaled instead if this
* is enabled in the configuration.
*/
if (zone->db != NULL && zone->journal != NULL &&
DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER)) {
isc_uint32_t serial, oldserial;
dns_zone_log(zone, ISC_LOG_DEBUG(3), "generating diffs");
result = dns_db_getsoaserial(db, ver, &serial);
if (result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_ERROR,
"ixfr-from-differences: unable to get "
"new serial");
goto fail;
}
/*
* This is checked in zone_postload() for master zones.
*/
result = zone_get_from_db(zone, zone->db, NULL, NULL,
&oldserial, NULL, NULL, NULL, NULL,
NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (zone->type == dns_zone_slave &&
!isc_serial_gt(serial, oldserial)) {
isc_uint32_t serialmin, serialmax;
serialmin = (oldserial + 1) & 0xffffffffU;
serialmax = (oldserial + 0x7fffffffU) & 0xffffffffU;
dns_zone_log(zone, ISC_LOG_ERROR,
"ixfr-from-differences: failed: "
"new serial (%u) out of range [%u - %u]",
serial, serialmin, serialmax);
result = ISC_R_RANGE;
goto fail;
}
result = dns_db_diff(zone->mctx, db, ver, zone->db, NULL,
zone->journal);
if (result != ISC_R_SUCCESS)
goto fail;
if (dump)
zone_needdump(zone, DNS_DUMP_DELAY);
else if (zone->journalsize != -1) {
result = dns_journal_compact(zone->mctx, zone->journal,
serial, zone->journalsize);
switch (result) {
case ISC_R_SUCCESS:
case ISC_R_NOSPACE:
case ISC_R_NOTFOUND:
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"dns_journal_compact: %s",
dns_result_totext(result));
break;
default:
dns_zone_log(zone, ISC_LOG_ERROR,
"dns_journal_compact failed: %s",
dns_result_totext(result));
break;
}
}
} else {
if (dump && zone->masterfile != NULL) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"dumping new zone version");
result = dns_db_dump2(db, ver, zone->masterfile,
zone->masterformat);
if (result != ISC_R_SUCCESS)
goto fail;
/*
* Update the time the zone was updated, so
* dns_zone_load can avoid loading it when
* the server is reloaded. If isc_time_now
* fails for some reason, all that happens is
* the timestamp is not updated.
*/
TIME_NOW(&zone->loadtime);
}
if (dump && zone->journal != NULL) {
/*
* The in-memory database just changed, and
* because 'dump' is set, it didn't change by
* being loaded from disk. Also, we have not
* journaled diffs for this change.
* Therefore, the on-disk journal is missing
* the deltas for this change. Since it can
* no longer be used to bring the zone
* up-to-date, it is useless and should be
* removed.
*/
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"removing journal file");
if (remove(zone->journal) < 0 && errno != ENOENT) {
char strbuf[ISC_STRERRORSIZE];
isc__strerror(errno, strbuf, sizeof(strbuf));
isc_log_write(dns_lctx,
DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE,
ISC_LOG_WARNING,
"unable to remove journal "
"'%s': '%s'",
zone->journal, strbuf);
}
}
}
dns_db_closeversion(db, &ver, ISC_FALSE);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"replacing zone database");
if (zone->db != NULL)
zone_detachdb(zone);
zone_attachdb(zone, db);
dns_db_settask(zone->db, zone->task);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_LOADED|DNS_ZONEFLG_NEEDNOTIFY);
return (ISC_R_SUCCESS);
fail:
dns_db_closeversion(db, &ver, ISC_FALSE);
return (result);
}
/* The caller must hold the dblock as a writer. */
static inline void
zone_attachdb(dns_zone_t *zone, dns_db_t *db) {
REQUIRE(zone->db == NULL && db != NULL);
dns_db_attach(db, &zone->db);
if (zone->acache != NULL) {
isc_result_t result;
result = dns_acache_setdb(zone->acache, db);
if (result != ISC_R_SUCCESS && result != ISC_R_EXISTS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"dns_acache_setdb() failed: %s",
isc_result_totext(result));
}
}
}
/* The caller must hold the dblock as a writer. */
static inline void
zone_detachdb(dns_zone_t *zone) {
REQUIRE(zone->db != NULL);
if (zone->acache != NULL)
(void)dns_acache_putdb(zone->acache, zone->db);
dns_db_detach(&zone->db);
}
static void
zone_xfrdone(dns_zone_t *zone, isc_result_t result) {
isc_time_t now;
isc_boolean_t again = ISC_FALSE;
unsigned int soacount;
unsigned int nscount;
isc_uint32_t serial, refresh, retry, expire, minimum;
isc_result_t xfrresult = result;
isc_boolean_t free_needed;
REQUIRE(DNS_ZONE_VALID(zone));
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"zone transfer finished: %s", dns_result_totext(result));
LOCK_ZONE(zone);
INSIST((zone->flags & DNS_ZONEFLG_REFRESH) != 0);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR);
TIME_NOW(&now);
switch (result) {
case ISC_R_SUCCESS:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NEEDNOTIFY);
/*FALLTHROUGH*/
case DNS_R_UPTODATE:
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_FORCEXFER);
/*
* Has the zone expired underneath us?
*/
ZONEDB_LOCK(&zone->dblock, isc_rwlocktype_read);
if (zone->db == NULL) {
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
goto same_master;
}
/*
* Update the zone structure's data from the actual
* SOA received.
*/
nscount = 0;
soacount = 0;
INSIST(zone->db != NULL);
result = zone_get_from_db(zone, zone->db, &nscount,
&soacount, &serial, &refresh,
&retry, &expire, &minimum, NULL);
ZONEDB_UNLOCK(&zone->dblock, isc_rwlocktype_read);
if (result == ISC_R_SUCCESS) {
if (soacount != 1)
dns_zone_log(zone, ISC_LOG_ERROR,
"transferred zone "
"has %d SOA record%s", soacount,
(soacount != 0) ? "s" : "");
if (nscount == 0) {
dns_zone_log(zone, ISC_LOG_ERROR,
"transferred zone "
"has no NS records");
if (DNS_ZONE_FLAG(zone,
DNS_ZONEFLG_HAVETIMERS)) {
zone->refresh = DNS_ZONE_DEFAULTREFRESH;
zone->retry = DNS_ZONE_DEFAULTRETRY;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
zone_unload(zone);
goto next_master;
}
zone->refresh = RANGE(refresh, zone->minrefresh,
zone->maxrefresh);
zone->retry = RANGE(retry, zone->minretry,
zone->maxretry);
zone->expire = RANGE(expire,
zone->refresh + zone->retry,
DNS_MAX_EXPIRE);
zone->minimum = minimum;
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_HAVETIMERS);
}
/*
* Set our next update/expire times.
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDREFRESH)) {
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDREFRESH);
zone->refreshtime = now;
DNS_ZONE_TIME_ADD(&now, zone->expire,
&zone->expiretime);
} else {
DNS_ZONE_JITTER_ADD(&now, zone->refresh,
&zone->refreshtime);
DNS_ZONE_TIME_ADD(&now, zone->expire,
&zone->expiretime);
}
if (result == ISC_R_SUCCESS && xfrresult == ISC_R_SUCCESS) {
char buf[DNS_NAME_FORMATSIZE + sizeof(": TSIG ''")];
if (zone->tsigkey != NULL) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(&zone->tsigkey->name, namebuf,
sizeof(namebuf));
snprintf(buf, sizeof(buf), ": TSIG '%s'",
namebuf);
} else
buf[0] = '\0';
dns_zone_log(zone, ISC_LOG_INFO,
"transferred serial %u%s",
serial, buf);
}
/*
* This is not necessary if we just performed a AXFR
* however it is necessary for an IXFR / UPTODATE and
* won't hurt with an AXFR.
*/
if (zone->masterfile != NULL || zone->journal != NULL) {
result = ISC_R_FAILURE;
if (zone->journal != NULL)
result = isc_file_settime(zone->journal, &now);
if (result != ISC_R_SUCCESS &&
zone->masterfile != NULL)
result = isc_file_settime(zone->masterfile,
&now);
/* Someone removed the file from underneath us! */
if (result == ISC_R_FILENOTFOUND &&
zone->masterfile != NULL)
zone_needdump(zone, DNS_DUMP_DELAY);
else if (result != ISC_R_SUCCESS)
dns_zone_log(zone, ISC_LOG_ERROR,
"transfer: could not set file "
"modification time of '%s': %s",
zone->masterfile,
dns_result_totext(result));
}
inc_stats(zone, dns_zonestatscounter_xfrsuccess);
break;
case DNS_R_BADIXFR:
/* Force retry with AXFR. */
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLAG_NOIXFR);
goto same_master;
default:
next_master:
/*
* Skip to next failed / untried master.
*/
do {
zone->curmaster++;
} while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster]);
/* FALLTHROUGH */
same_master:
if (zone->curmaster >= zone->masterscnt) {
zone->curmaster = 0;
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_USEALTXFRSRC) &&
!DNS_ZONE_FLAG(zone, DNS_ZONEFLG_USEALTXFRSRC)) {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
while (zone->curmaster < zone->masterscnt &&
zone->mastersok[zone->curmaster])
zone->curmaster++;
again = ISC_TRUE;
} else
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_USEALTXFRSRC);
} else {
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_REFRESH);
again = ISC_TRUE;
}
inc_stats(zone, dns_zonestatscounter_xfrfail);
break;
}
zone_settimer(zone, &now);
/*
* If creating the transfer object failed, zone->xfr is NULL.
* Otherwise, we are called as the done callback of a zone
* transfer object that just entered its shutting-down
* state. Since we are no longer responsible for shutting
* it down, we can detach our reference.
*/
if (zone->xfr != NULL)
dns_xfrin_detach(&zone->xfr);
if (zone->tsigkey != NULL)
dns_tsigkey_detach(&zone->tsigkey);
/*
* Handle any deferred journal compaction.
*/
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_NEEDCOMPACT)) {
result = dns_journal_compact(zone->mctx, zone->journal,
zone->compact_serial,
zone->journalsize);
switch (result) {
case ISC_R_SUCCESS:
case ISC_R_NOSPACE:
case ISC_R_NOTFOUND:
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"dns_journal_compact: %s",
dns_result_totext(result));
break;
default:
dns_zone_log(zone, ISC_LOG_ERROR,
"dns_journal_compact failed: %s",
dns_result_totext(result));
break;
}
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_NEEDCOMPACT);
}
/*
* This transfer finishing freed up a transfer quota slot.
* Let any other zones waiting for quota have it.
*/
RWLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
ISC_LIST_UNLINK(zone->zmgr->xfrin_in_progress, zone, statelink);
zone->statelist = NULL;
zmgr_resume_xfrs(zone->zmgr, ISC_FALSE);
RWUNLOCK(&zone->zmgr->rwlock, isc_rwlocktype_write);
/*
* Retry with a different server if necessary.
*/
if (again && !DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING))
queue_soa_query(zone);
INSIST(zone->irefs > 0);
zone->irefs--;
free_needed = exit_check(zone);
UNLOCK_ZONE(zone);
if (free_needed)
zone_free(zone);
}
static void
zone_loaddone(void *arg, isc_result_t result) {
static char me[] = "zone_loaddone";
dns_load_t *load = arg;
dns_zone_t *zone;
isc_result_t tresult;
REQUIRE(DNS_LOAD_VALID(load));
zone = load->zone;
ENTER;
tresult = dns_db_endload(load->db, &load->callbacks.add_private);
if (tresult != ISC_R_SUCCESS &&
(result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE))
result = tresult;
LOCK_ZONE(load->zone);
(void)zone_postload(load->zone, load->db, load->loadtime, result);
zonemgr_putio(&load->zone->readio);
DNS_ZONE_CLRFLAG(load->zone, DNS_ZONEFLG_LOADING);
/*
* Leave the zone frozen if the reload fails.
*/
if ((result == ISC_R_SUCCESS || result == DNS_R_SEENINCLUDE) &&
DNS_ZONE_FLAG(load->zone, DNS_ZONEFLG_THAW))
zone->update_disabled = ISC_FALSE;
DNS_ZONE_CLRFLAG(load->zone, DNS_ZONEFLG_THAW);
UNLOCK_ZONE(load->zone);
load->magic = 0;
dns_db_detach(&load->db);
if (load->zone->lctx != NULL)
dns_loadctx_detach(&load->zone->lctx);
dns_zone_idetach(&load->zone);
isc_mem_putanddetach(&load->mctx, load, sizeof(*load));
}
void
dns_zone_getssutable(dns_zone_t *zone, dns_ssutable_t **table) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(table != NULL);
REQUIRE(*table == NULL);
LOCK_ZONE(zone);
if (zone->ssutable != NULL)
dns_ssutable_attach(zone->ssutable, table);
UNLOCK_ZONE(zone);
}
void
dns_zone_setssutable(dns_zone_t *zone, dns_ssutable_t *table) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->ssutable != NULL)
dns_ssutable_detach(&zone->ssutable);
if (table != NULL)
dns_ssutable_attach(table, &zone->ssutable);
UNLOCK_ZONE(zone);
}
void
dns_zone_setsigvalidityinterval(dns_zone_t *zone, isc_uint32_t interval) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->sigvalidityinterval = interval;
}
isc_uint32_t
dns_zone_getsigvalidityinterval(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->sigvalidityinterval);
}
void
dns_zone_setsigresigninginterval(dns_zone_t *zone, isc_uint32_t interval) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->sigresigninginterval = interval;
}
isc_uint32_t
dns_zone_getsigresigninginterval(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->sigresigninginterval);
}
static void
queue_xfrin(dns_zone_t *zone) {
const char me[] = "queue_xfrin";
isc_result_t result;
dns_zonemgr_t *zmgr = zone->zmgr;
ENTER;
INSIST(zone->statelist == NULL);
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
ISC_LIST_APPEND(zmgr->waiting_for_xfrin, zone, statelink);
LOCK_ZONE(zone);
zone->irefs++;
UNLOCK_ZONE(zone);
zone->statelist = &zmgr->waiting_for_xfrin;
result = zmgr_start_xfrin_ifquota(zmgr, zone);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
if (result == ISC_R_QUOTA) {
dns_zone_logc(zone, DNS_LOGCATEGORY_XFER_IN, ISC_LOG_INFO,
"zone transfer deferred due to quota");
} else if (result != ISC_R_SUCCESS) {
dns_zone_logc(zone, DNS_LOGCATEGORY_XFER_IN, ISC_LOG_ERROR,
"starting zone transfer: %s",
isc_result_totext(result));
}
}
/*
* This event callback is called when a zone has received
* any necessary zone transfer quota. This is the time
* to go ahead and start the transfer.
*/
static void
got_transfer_quota(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
dns_peer_t *peer = NULL;
char master[ISC_SOCKADDR_FORMATSIZE];
char source[ISC_SOCKADDR_FORMATSIZE];
dns_rdatatype_t xfrtype;
dns_zone_t *zone = event->ev_arg;
isc_netaddr_t masterip;
isc_sockaddr_t sourceaddr;
isc_sockaddr_t masteraddr;
isc_time_t now;
UNUSED(task);
INSIST(task == zone->task);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_EXITING)) {
result = ISC_R_CANCELED;
goto cleanup;
}
TIME_NOW(&now);
isc_sockaddr_format(&zone->masteraddr, master, sizeof(master));
if (dns_zonemgr_unreachable(zone->zmgr, &zone->masteraddr,
&zone->sourceaddr, &now)) {
isc_sockaddr_format(&zone->sourceaddr, source, sizeof(source));
dns_zone_log(zone, ISC_LOG_INFO,
"got_transfer_quota: skipping zone transfer as "
"master %s (source %s) is unreachable (cached)",
master, source);
result = ISC_R_CANCELED;
goto cleanup;
}
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
(void)dns_peerlist_peerbyaddr(zone->view->peers, &masterip, &peer);
/*
* Decide whether we should request IXFR or AXFR.
*/
if (zone->db == NULL) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"no database exists yet, requesting AXFR of "
"initial version from %s", master);
xfrtype = dns_rdatatype_axfr;
} else if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_IXFRFROMDIFFS)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1), "ixfr-from-differences "
"set, requesting AXFR from %s", master);
xfrtype = dns_rdatatype_axfr;
} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"forced reload, requesting AXFR of "
"initial version from %s", master);
xfrtype = dns_rdatatype_axfr;
} else if (DNS_ZONE_FLAG(zone, DNS_ZONEFLAG_NOIXFR)) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"retrying with AXFR from %s due to "
"previous IXFR failure", master);
xfrtype = dns_rdatatype_axfr;
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLAG_NOIXFR);
UNLOCK_ZONE(zone);
} else {
isc_boolean_t use_ixfr = ISC_TRUE;
if (peer != NULL &&
dns_peer_getrequestixfr(peer, &use_ixfr) ==
ISC_R_SUCCESS) {
; /* Using peer setting */
} else {
use_ixfr = zone->view->requestixfr;
}
if (use_ixfr == ISC_FALSE) {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"IXFR disabled, requesting AXFR from %s",
master);
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_SOABEFOREAXFR))
xfrtype = dns_rdatatype_soa;
else
xfrtype = dns_rdatatype_axfr;
} else {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"requesting IXFR from %s", master);
xfrtype = dns_rdatatype_ixfr;
}
}
/*
* Determine if we should attempt to sign the request with TSIG.
*/
result = ISC_R_NOTFOUND;
/*
* First, look for a tsig key in the master statement, then
* try for a server key.
*/
if ((zone->masterkeynames != NULL) &&
(zone->masterkeynames[zone->curmaster] != NULL)) {
dns_view_t *view = dns_zone_getview(zone);
dns_name_t *keyname = zone->masterkeynames[zone->curmaster];
result = dns_view_gettsig(view, keyname, &zone->tsigkey);
}
if (zone->tsigkey == NULL)
result = dns_view_getpeertsig(zone->view, &masterip,
&zone->tsigkey);
if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND) {
dns_zone_log(zone, ISC_LOG_ERROR,
"could not get TSIG key for zone transfer: %s",
isc_result_totext(result));
}
LOCK_ZONE(zone);
masteraddr = zone->masteraddr;
sourceaddr = zone->sourceaddr;
UNLOCK_ZONE(zone);
INSIST(isc_sockaddr_pf(&masteraddr) == isc_sockaddr_pf(&sourceaddr));
result = dns_xfrin_create2(zone, xfrtype, &masteraddr, &sourceaddr,
zone->tsigkey, zone->mctx,
zone->zmgr->timermgr, zone->zmgr->socketmgr,
zone->task, zone_xfrdone, &zone->xfr);
if (result == ISC_R_SUCCESS) {
LOCK_ZONE(zone);
if (xfrtype == dns_rdatatype_axfr) {
if (isc_sockaddr_pf(&masteraddr) == PF_INET)
inc_stats(zone, dns_zonestatscounter_axfrreqv4);
else
inc_stats(zone, dns_zonestatscounter_axfrreqv6);
} else if (xfrtype == dns_rdatatype_ixfr) {
if (isc_sockaddr_pf(&masteraddr) == PF_INET)
inc_stats(zone, dns_zonestatscounter_ixfrreqv4);
else
inc_stats(zone, dns_zonestatscounter_ixfrreqv6);
}
UNLOCK_ZONE(zone);
}
cleanup:
/*
* Any failure in this function is handled like a failed
* zone transfer. This ensures that we get removed from
* zmgr->xfrin_in_progress.
*/
if (result != ISC_R_SUCCESS)
zone_xfrdone(zone, result);
isc_event_free(&event);
}
/*
* Update forwarding support.
*/
static void
forward_destroy(dns_forward_t *forward) {
forward->magic = 0;
if (forward->request != NULL)
dns_request_destroy(&forward->request);
if (forward->msgbuf != NULL)
isc_buffer_free(&forward->msgbuf);
if (forward->zone != NULL)
dns_zone_idetach(&forward->zone);
isc_mem_putanddetach(&forward->mctx, forward, sizeof(*forward));
}
static isc_result_t
sendtomaster(dns_forward_t *forward) {
isc_result_t result;
isc_sockaddr_t src;
LOCK_ZONE(forward->zone);
if (forward->which >= forward->zone->masterscnt) {
UNLOCK_ZONE(forward->zone);
return (ISC_R_NOMORE);
}
forward->addr = forward->zone->masters[forward->which];
/*
* Always use TCP regardless of whether the original update
* used TCP.
* XXX The timeout may but a bit small if we are far down a
* transfer graph and the master has to try several masters.
*/
switch (isc_sockaddr_pf(&forward->addr)) {
case PF_INET:
src = forward->zone->xfrsource4;
break;
case PF_INET6:
src = forward->zone->xfrsource6;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto unlock;
}
result = dns_request_createraw(forward->zone->view->requestmgr,
forward->msgbuf,
&src, &forward->addr,
DNS_REQUESTOPT_TCP, 15 /* XXX */,
forward->zone->task,
forward_callback, forward,
&forward->request);
unlock:
UNLOCK_ZONE(forward->zone);
return (result);
}
static void
forward_callback(isc_task_t *task, isc_event_t *event) {
const char me[] = "forward_callback";
dns_requestevent_t *revent = (dns_requestevent_t *)event;
dns_message_t *msg = NULL;
char master[ISC_SOCKADDR_FORMATSIZE];
isc_result_t result;
dns_forward_t *forward;
dns_zone_t *zone;
UNUSED(task);
forward = revent->ev_arg;
INSIST(DNS_FORWARD_VALID(forward));
zone = forward->zone;
INSIST(DNS_ZONE_VALID(zone));
ENTER;
isc_sockaddr_format(&forward->addr, master, sizeof(master));
if (revent->result != ISC_R_SUCCESS) {
dns_zone_log(zone, ISC_LOG_INFO,
"could not forward dynamic update to %s: %s",
master, dns_result_totext(revent->result));
goto next_master;
}
result = dns_message_create(zone->mctx, DNS_MESSAGE_INTENTPARSE, &msg);
if (result != ISC_R_SUCCESS)
goto next_master;
result = dns_request_getresponse(revent->request, msg,
DNS_MESSAGEPARSE_PRESERVEORDER |
DNS_MESSAGEPARSE_CLONEBUFFER);
if (result != ISC_R_SUCCESS)
goto next_master;
switch (msg->rcode) {
/*
* Pass these rcodes back to client.
*/
case dns_rcode_noerror:
case dns_rcode_yxdomain:
case dns_rcode_yxrrset:
case dns_rcode_nxrrset:
case dns_rcode_refused:
case dns_rcode_nxdomain:
break;
/* These should not occur if the masters/zone are valid. */
case dns_rcode_notzone:
case dns_rcode_notauth: {
char rcode[128];
isc_buffer_t rb;
isc_buffer_init(&rb, rcode, sizeof(rcode));
(void)dns_rcode_totext(msg->rcode, &rb);
dns_zone_log(zone, ISC_LOG_WARNING,
"forwarding dynamic update: "
"unexpected response: master %s returned: %.*s",
master, (int)rb.used, rcode);
goto next_master;
}
/* Try another server for these rcodes. */
case dns_rcode_formerr:
case dns_rcode_servfail:
case dns_rcode_notimp:
case dns_rcode_badvers:
default:
goto next_master;
}
/* call callback */
(forward->callback)(forward->callback_arg, ISC_R_SUCCESS, msg);
msg = NULL;
dns_request_destroy(&forward->request);
forward_destroy(forward);
isc_event_free(&event);
return;
next_master:
if (msg != NULL)
dns_message_destroy(&msg);
isc_event_free(&event);
forward->which++;
dns_request_destroy(&forward->request);
result = sendtomaster(forward);
if (result != ISC_R_SUCCESS) {
/* call callback */
dns_zone_log(zone, ISC_LOG_DEBUG(3),
"exhausted dynamic update forwarder list");
(forward->callback)(forward->callback_arg, result, NULL);
forward_destroy(forward);
}
}
isc_result_t
dns_zone_forwardupdate(dns_zone_t *zone, dns_message_t *msg,
dns_updatecallback_t callback, void *callback_arg)
{
dns_forward_t *forward;
isc_result_t result;
isc_region_t *mr;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(msg != NULL);
REQUIRE(callback != NULL);
forward = isc_mem_get(zone->mctx, sizeof(*forward));
if (forward == NULL)
return (ISC_R_NOMEMORY);
forward->request = NULL;
forward->zone = NULL;
forward->msgbuf = NULL;
forward->which = 0;
forward->mctx = 0;
forward->callback = callback;
forward->callback_arg = callback_arg;
forward->magic = FORWARD_MAGIC;
mr = dns_message_getrawmessage(msg);
if (mr == NULL) {
result = ISC_R_UNEXPECTEDEND;
goto cleanup;
}
result = isc_buffer_allocate(zone->mctx, &forward->msgbuf, mr->length);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_buffer_copyregion(forward->msgbuf, mr);
if (result != ISC_R_SUCCESS)
goto cleanup;
isc_mem_attach(zone->mctx, &forward->mctx);
dns_zone_iattach(zone, &forward->zone);
result = sendtomaster(forward);
cleanup:
if (result != ISC_R_SUCCESS) {
forward_destroy(forward);
}
return (result);
}
isc_result_t
dns_zone_next(dns_zone_t *zone, dns_zone_t **next) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(next != NULL && *next == NULL);
*next = ISC_LIST_NEXT(zone, link);
if (*next == NULL)
return (ISC_R_NOMORE);
else
return (ISC_R_SUCCESS);
}
isc_result_t
dns_zone_first(dns_zonemgr_t *zmgr, dns_zone_t **first) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(first != NULL && *first == NULL);
*first = ISC_LIST_HEAD(zmgr->zones);
if (*first == NULL)
return (ISC_R_NOMORE);
else
return (ISC_R_SUCCESS);
}
/***
*** Zone manager.
***/
isc_result_t
dns_zonemgr_create(isc_mem_t *mctx, isc_taskmgr_t *taskmgr,
isc_timermgr_t *timermgr, isc_socketmgr_t *socketmgr,
dns_zonemgr_t **zmgrp)
{
dns_zonemgr_t *zmgr;
isc_result_t result;
isc_interval_t interval;
zmgr = isc_mem_get(mctx, sizeof(*zmgr));
if (zmgr == NULL)
return (ISC_R_NOMEMORY);
zmgr->mctx = NULL;
zmgr->refs = 1;
isc_mem_attach(mctx, &zmgr->mctx);
zmgr->taskmgr = taskmgr;
zmgr->timermgr = timermgr;
zmgr->socketmgr = socketmgr;
zmgr->zonetasks = NULL;
zmgr->task = NULL;
zmgr->rl = NULL;
ISC_LIST_INIT(zmgr->zones);
ISC_LIST_INIT(zmgr->waiting_for_xfrin);
ISC_LIST_INIT(zmgr->xfrin_in_progress);
memset(zmgr->unreachable, 0, sizeof(zmgr->unreachable));
result = isc_rwlock_init(&zmgr->rwlock, 0, 0);
if (result != ISC_R_SUCCESS)
goto free_mem;
zmgr->transfersin = 10;
zmgr->transfersperns = 2;
/* Create the zone task pool. */
result = isc_taskpool_create(taskmgr, mctx,
8 /* XXX */, 2, &zmgr->zonetasks);
if (result != ISC_R_SUCCESS)
goto free_rwlock;
/* Create a single task for queueing of SOA queries. */
result = isc_task_create(taskmgr, 1, &zmgr->task);
if (result != ISC_R_SUCCESS)
goto free_taskpool;
isc_task_setname(zmgr->task, "zmgr", zmgr);
result = isc_ratelimiter_create(mctx, timermgr, zmgr->task,
&zmgr->rl);
if (result != ISC_R_SUCCESS)
goto free_task;
/* default to 20 refresh queries / notifies per second. */
isc_interval_set(&interval, 0, 1000000000/2);
result = isc_ratelimiter_setinterval(zmgr->rl, &interval);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
isc_ratelimiter_setpertic(zmgr->rl, 10);
zmgr->iolimit = 1;
zmgr->ioactive = 0;
ISC_LIST_INIT(zmgr->high);
ISC_LIST_INIT(zmgr->low);
result = isc_mutex_init(&zmgr->iolock);
if (result != ISC_R_SUCCESS)
goto free_rl;
zmgr->magic = ZONEMGR_MAGIC;
*zmgrp = zmgr;
return (ISC_R_SUCCESS);
#if 0
free_iolock:
DESTROYLOCK(&zmgr->iolock);
#endif
free_rl:
isc_ratelimiter_detach(&zmgr->rl);
free_task:
isc_task_detach(&zmgr->task);
free_taskpool:
isc_taskpool_destroy(&zmgr->zonetasks);
free_rwlock:
isc_rwlock_destroy(&zmgr->rwlock);
free_mem:
isc_mem_put(zmgr->mctx, zmgr, sizeof(*zmgr));
isc_mem_detach(&mctx);
return (result);
}
isc_result_t
dns_zonemgr_managezone(dns_zonemgr_t *zmgr, dns_zone_t *zone) {
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
LOCK_ZONE(zone);
REQUIRE(zone->task == NULL);
REQUIRE(zone->timer == NULL);
REQUIRE(zone->zmgr == NULL);
isc_taskpool_gettask(zmgr->zonetasks,
dns_name_hash(dns_zone_getorigin(zone),
ISC_FALSE),
&zone->task);
/*
* Set the task name. The tag will arbitrarily point to one
* of the zones sharing the task (in practice, the one
* to be managed last).
*/
isc_task_setname(zone->task, "zone", zone);
result = isc_timer_create(zmgr->timermgr, isc_timertype_inactive,
NULL, NULL,
zone->task, zone_timer, zone,
&zone->timer);
if (result != ISC_R_SUCCESS)
goto cleanup_task;
/*
* The timer "holds" a iref.
*/
zone->irefs++;
INSIST(zone->irefs != 0);
ISC_LIST_APPEND(zmgr->zones, zone, link);
zone->zmgr = zmgr;
zmgr->refs++;
goto unlock;
cleanup_task:
isc_task_detach(&zone->task);
unlock:
UNLOCK_ZONE(zone);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
return (result);
}
void
dns_zonemgr_releasezone(dns_zonemgr_t *zmgr, dns_zone_t *zone) {
isc_boolean_t free_now = ISC_FALSE;
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(zone->zmgr == zmgr);
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
LOCK_ZONE(zone);
ISC_LIST_UNLINK(zmgr->zones, zone, link);
zone->zmgr = NULL;
zmgr->refs--;
if (zmgr->refs == 0)
free_now = ISC_TRUE;
UNLOCK_ZONE(zone);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
if (free_now)
zonemgr_free(zmgr);
ENSURE(zone->zmgr == NULL);
}
void
dns_zonemgr_attach(dns_zonemgr_t *source, dns_zonemgr_t **target) {
REQUIRE(DNS_ZONEMGR_VALID(source));
REQUIRE(target != NULL && *target == NULL);
RWLOCK(&source->rwlock, isc_rwlocktype_write);
REQUIRE(source->refs > 0);
source->refs++;
INSIST(source->refs > 0);
RWUNLOCK(&source->rwlock, isc_rwlocktype_write);
*target = source;
}
void
dns_zonemgr_detach(dns_zonemgr_t **zmgrp) {
dns_zonemgr_t *zmgr;
isc_boolean_t free_now = ISC_FALSE;
REQUIRE(zmgrp != NULL);
zmgr = *zmgrp;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
zmgr->refs--;
if (zmgr->refs == 0)
free_now = ISC_TRUE;
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
if (free_now)
zonemgr_free(zmgr);
}
isc_result_t
dns_zonemgr_forcemaint(dns_zonemgr_t *zmgr) {
dns_zone_t *p;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_read);
for (p = ISC_LIST_HEAD(zmgr->zones);
p != NULL;
p = ISC_LIST_NEXT(p, link))
{
dns_zone_maintenance(p);
}
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read);
/*
* Recent configuration changes may have increased the
* amount of available transfers quota. Make sure any
* transfers currently blocked on quota get started if
* possible.
*/
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
zmgr_resume_xfrs(zmgr, ISC_TRUE);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
return (ISC_R_SUCCESS);
}
void
dns_zonemgr_resumexfrs(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
zmgr_resume_xfrs(zmgr, ISC_TRUE);
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
}
void
dns_zonemgr_shutdown(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
isc_ratelimiter_shutdown(zmgr->rl);
if (zmgr->task != NULL)
isc_task_destroy(&zmgr->task);
if (zmgr->zonetasks != NULL)
isc_taskpool_destroy(&zmgr->zonetasks);
}
static void
zonemgr_free(dns_zonemgr_t *zmgr) {
isc_mem_t *mctx;
INSIST(zmgr->refs == 0);
INSIST(ISC_LIST_EMPTY(zmgr->zones));
zmgr->magic = 0;
DESTROYLOCK(&zmgr->iolock);
isc_ratelimiter_detach(&zmgr->rl);
isc_rwlock_destroy(&zmgr->rwlock);
mctx = zmgr->mctx;
isc_mem_put(zmgr->mctx, zmgr, sizeof(*zmgr));
isc_mem_detach(&mctx);
}
void
dns_zonemgr_settransfersin(dns_zonemgr_t *zmgr, isc_uint32_t value) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
zmgr->transfersin = value;
}
isc_uint32_t
dns_zonemgr_getttransfersin(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->transfersin);
}
void
dns_zonemgr_settransfersperns(dns_zonemgr_t *zmgr, isc_uint32_t value) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
zmgr->transfersperns = value;
}
isc_uint32_t
dns_zonemgr_getttransfersperns(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->transfersperns);
}
/*
* Try to start a new incoming zone transfer to fill a quota
* slot that was just vacated.
*
* Requires:
* The zone manager is locked by the caller.
*/
static void
zmgr_resume_xfrs(dns_zonemgr_t *zmgr, isc_boolean_t multi) {
dns_zone_t *zone;
dns_zone_t *next;
for (zone = ISC_LIST_HEAD(zmgr->waiting_for_xfrin);
zone != NULL;
zone = next)
{
isc_result_t result;
next = ISC_LIST_NEXT(zone, statelink);
result = zmgr_start_xfrin_ifquota(zmgr, zone);
if (result == ISC_R_SUCCESS) {
if (multi)
continue;
/*
* We successfully filled the slot. We're done.
*/
break;
} else if (result == ISC_R_QUOTA) {
/*
* Not enough quota. This is probably the per-server
* quota, because we usually get called when a unit of
* global quota has just been freed. Try the next
* zone, it may succeed if it uses another master.
*/
continue;
} else {
dns_zone_log(zone, ISC_LOG_DEBUG(1),
"starting zone transfer: %s",
isc_result_totext(result));
break;
}
}
}
/*
* Try to start an incoming zone transfer for 'zone', quota permitting.
*
* Requires:
* The zone manager is locked by the caller.
*
* Returns:
* ISC_R_SUCCESS There was enough quota and we attempted to
* start a transfer. zone_xfrdone() has been or will
* be called.
* ISC_R_QUOTA Not enough quota.
* Others Failure.
*/
static isc_result_t
zmgr_start_xfrin_ifquota(dns_zonemgr_t *zmgr, dns_zone_t *zone) {
dns_peer_t *peer = NULL;
isc_netaddr_t masterip;
isc_uint32_t nxfrsin, nxfrsperns;
dns_zone_t *x;
isc_uint32_t maxtransfersin, maxtransfersperns;
isc_event_t *e;
/*
* Find any configured information about the server we'd
* like to transfer this zone from.
*/
isc_netaddr_fromsockaddr(&masterip, &zone->masteraddr);
(void)dns_peerlist_peerbyaddr(zone->view->peers,
&masterip, &peer);
/*
* Determine the total maximum number of simultaneous
* transfers allowed, and the maximum for this specific
* master.
*/
maxtransfersin = zmgr->transfersin;
maxtransfersperns = zmgr->transfersperns;
if (peer != NULL)
(void)dns_peer_gettransfers(peer, &maxtransfersperns);
/*
* Count the total number of transfers that are in progress,
* and the number of transfers in progress from this master.
* We linearly scan a list of all transfers; if this turns
* out to be too slow, we could hash on the master address.
*/
nxfrsin = nxfrsperns = 0;
for (x = ISC_LIST_HEAD(zmgr->xfrin_in_progress);
x != NULL;
x = ISC_LIST_NEXT(x, statelink))
{
isc_netaddr_t xip;
isc_netaddr_fromsockaddr(&xip, &x->masteraddr);
nxfrsin++;
if (isc_netaddr_equal(&xip, &masterip))
nxfrsperns++;
}
/* Enforce quota. */
if (nxfrsin >= maxtransfersin)
return (ISC_R_QUOTA);
if (nxfrsperns >= maxtransfersperns)
return (ISC_R_QUOTA);
/*
* We have sufficient quota. Move the zone to the "xfrin_in_progress"
* list and send it an event to let it start the actual transfer in the
* context of its own task.
*/
e = isc_event_allocate(zmgr->mctx, zmgr,
DNS_EVENT_ZONESTARTXFRIN,
got_transfer_quota, zone,
sizeof(isc_event_t));
if (e == NULL)
return (ISC_R_NOMEMORY);
LOCK_ZONE(zone);
INSIST(zone->statelist == &zmgr->waiting_for_xfrin);
ISC_LIST_UNLINK(zmgr->waiting_for_xfrin, zone, statelink);
ISC_LIST_APPEND(zmgr->xfrin_in_progress, zone, statelink);
zone->statelist = &zmgr->xfrin_in_progress;
isc_task_send(zone->task, &e);
dns_zone_log(zone, ISC_LOG_INFO, "Transfer started.");
UNLOCK_ZONE(zone);
return (ISC_R_SUCCESS);
}
void
dns_zonemgr_setiolimit(dns_zonemgr_t *zmgr, isc_uint32_t iolimit) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(iolimit > 0);
zmgr->iolimit = iolimit;
}
isc_uint32_t
dns_zonemgr_getiolimit(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->iolimit);
}
/*
* Get permission to request a file handle from the OS.
* An event will be sent to action when one is available.
* There are two queues available (high and low), the high
* queue will be serviced before the low one.
*
* zonemgr_putio() must be called after the event is delivered to
* 'action'.
*/
static isc_result_t
zonemgr_getio(dns_zonemgr_t *zmgr, isc_boolean_t high,
isc_task_t *task, isc_taskaction_t action, void *arg,
dns_io_t **iop)
{
dns_io_t *io;
isc_boolean_t queue;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
REQUIRE(iop != NULL && *iop == NULL);
io = isc_mem_get(zmgr->mctx, sizeof(*io));
if (io == NULL)
return (ISC_R_NOMEMORY);
io->event = isc_event_allocate(zmgr->mctx, task, DNS_EVENT_IOREADY,
action, arg, sizeof(*io->event));
if (io->event == NULL) {
isc_mem_put(zmgr->mctx, io, sizeof(*io));
return (ISC_R_NOMEMORY);
}
io->zmgr = zmgr;
io->high = high;
io->task = NULL;
isc_task_attach(task, &io->task);
ISC_LINK_INIT(io, link);
io->magic = IO_MAGIC;
LOCK(&zmgr->iolock);
zmgr->ioactive++;
queue = ISC_TF(zmgr->ioactive > zmgr->iolimit);
if (queue) {
if (io->high)
ISC_LIST_APPEND(zmgr->high, io, link);
else
ISC_LIST_APPEND(zmgr->low, io, link);
}
UNLOCK(&zmgr->iolock);
*iop = io;
if (!queue) {
isc_task_send(io->task, &io->event);
}
return (ISC_R_SUCCESS);
}
static void
zonemgr_putio(dns_io_t **iop) {
dns_io_t *io;
dns_io_t *next;
dns_zonemgr_t *zmgr;
REQUIRE(iop != NULL);
io = *iop;
REQUIRE(DNS_IO_VALID(io));
*iop = NULL;
INSIST(!ISC_LINK_LINKED(io, link));
INSIST(io->event == NULL);
zmgr = io->zmgr;
isc_task_detach(&io->task);
io->magic = 0;
isc_mem_put(zmgr->mctx, io, sizeof(*io));
LOCK(&zmgr->iolock);
INSIST(zmgr->ioactive > 0);
zmgr->ioactive--;
next = HEAD(zmgr->high);
if (next == NULL)
next = HEAD(zmgr->low);
if (next != NULL) {
if (next->high)
ISC_LIST_UNLINK(zmgr->high, next, link);
else
ISC_LIST_UNLINK(zmgr->low, next, link);
INSIST(next->event != NULL);
}
UNLOCK(&zmgr->iolock);
if (next != NULL)
isc_task_send(next->task, &next->event);
}
static void
zonemgr_cancelio(dns_io_t *io) {
isc_boolean_t send_event = ISC_FALSE;
REQUIRE(DNS_IO_VALID(io));
/*
* If we are queued to be run then dequeue.
*/
LOCK(&io->zmgr->iolock);
if (ISC_LINK_LINKED(io, link)) {
if (io->high)
ISC_LIST_UNLINK(io->zmgr->high, io, link);
else
ISC_LIST_UNLINK(io->zmgr->low, io, link);
send_event = ISC_TRUE;
INSIST(io->event != NULL);
}
UNLOCK(&io->zmgr->iolock);
if (send_event) {
io->event->ev_attributes |= ISC_EVENTATTR_CANCELED;
isc_task_send(io->task, &io->event);
}
}
static void
zone_saveunique(dns_zone_t *zone, const char *path, const char *templat) {
char *buf;
int buflen;
isc_result_t result;
buflen = strlen(path) + strlen(templat) + 2;
buf = isc_mem_get(zone->mctx, buflen);
if (buf == NULL)
return;
result = isc_file_template(path, templat, buf, buflen);
if (result != ISC_R_SUCCESS)
goto cleanup;
result = isc_file_renameunique(path, buf);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_zone_log(zone, ISC_LOG_WARNING, "saved '%s' as '%s'",
path, buf);
cleanup:
isc_mem_put(zone->mctx, buf, buflen);
}
#if 0
/* Hook for ondestroy notification from a database. */
static void
dns_zonemgr_dbdestroyed(isc_task_t *task, isc_event_t *event) {
dns_db_t *db = event->sender;
UNUSED(task);
isc_event_free(&event);
isc_log_write(dns_lctx, DNS_LOGCATEGORY_GENERAL,
DNS_LOGMODULE_ZONE, ISC_LOG_DEBUG(3),
"database (%p) destroyed", (void*) db);
}
#endif
void
dns_zonemgr_setserialqueryrate(dns_zonemgr_t *zmgr, unsigned int value) {
isc_interval_t interval;
isc_uint32_t s, ns;
isc_uint32_t pertic;
isc_result_t result;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
if (value == 0)
value = 1;
if (value == 1) {
s = 1;
ns = 0;
pertic = 1;
} else if (value <= 10) {
s = 0;
ns = 1000000000 / value;
pertic = 1;
} else {
s = 0;
ns = (1000000000 / value) * 10;
pertic = 10;
}
isc_interval_set(&interval, s, ns);
result = isc_ratelimiter_setinterval(zmgr->rl, &interval);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
isc_ratelimiter_setpertic(zmgr->rl, pertic);
zmgr->serialqueryrate = value;
}
unsigned int
dns_zonemgr_getserialqueryrate(dns_zonemgr_t *zmgr) {
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
return (zmgr->serialqueryrate);
}
static isc_boolean_t
dns_zonemgr_unreachable(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote,
isc_sockaddr_t *local, isc_time_t *now)
{
unsigned int i;
isc_rwlocktype_t locktype;
isc_result_t result;
isc_uint32_t seconds = isc_time_seconds(now);
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
locktype = isc_rwlocktype_read;
RWLOCK(&zmgr->rwlock, locktype);
for (i = 0; i < UNREACH_CHACHE_SIZE; i++) {
if (zmgr->unreachable[i].expire >= seconds &&
isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) &&
isc_sockaddr_equal(&zmgr->unreachable[i].local, local)) {
result = isc_rwlock_tryupgrade(&zmgr->rwlock);
if (result == ISC_R_SUCCESS) {
locktype = isc_rwlocktype_write;
zmgr->unreachable[i].last = seconds;
}
break;
}
}
RWUNLOCK(&zmgr->rwlock, locktype);
return (ISC_TF(i < UNREACH_CHACHE_SIZE));
}
void
dns_zonemgr_unreachableadd(dns_zonemgr_t *zmgr, isc_sockaddr_t *remote,
isc_sockaddr_t *local, isc_time_t *now)
{
isc_uint32_t seconds = isc_time_seconds(now);
isc_uint32_t last = seconds;
unsigned int i, slot = UNREACH_CHACHE_SIZE, oldest = 0;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_write);
for (i = 0; i < UNREACH_CHACHE_SIZE; i++) {
/* Existing entry? */
if (isc_sockaddr_equal(&zmgr->unreachable[i].remote, remote) &&
isc_sockaddr_equal(&zmgr->unreachable[i].local, local))
break;
/* Empty slot? */
if (zmgr->unreachable[i].expire < seconds)
slot = i;
/* Least recently used slot? */
if (zmgr->unreachable[i].last < last) {
last = zmgr->unreachable[i].last;
oldest = i;
}
}
if (i < UNREACH_CHACHE_SIZE) {
/*
* Found a existing entry. Update the expire timer and
* last usage timestamps.
*/
zmgr->unreachable[i].expire = seconds + UNREACH_HOLD_TIME;
zmgr->unreachable[i].last = seconds;
} else if (slot != UNREACH_CHACHE_SIZE) {
/*
* Found a empty slot. Add a new entry to the cache.
*/
zmgr->unreachable[slot].expire = seconds + UNREACH_HOLD_TIME;
zmgr->unreachable[slot].last = seconds;
zmgr->unreachable[slot].remote = *remote;
zmgr->unreachable[slot].local = *local;
} else {
/*
* Replace the least recently used entry in the cache.
*/
zmgr->unreachable[oldest].expire = seconds + UNREACH_HOLD_TIME;
zmgr->unreachable[oldest].last = seconds;
zmgr->unreachable[oldest].remote = *remote;
zmgr->unreachable[oldest].local = *local;
}
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_write);
}
void
dns_zone_forcereload(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
if (zone->type == dns_zone_master)
return;
LOCK_ZONE(zone);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_FORCEXFER);
UNLOCK_ZONE(zone);
dns_zone_refresh(zone);
}
isc_boolean_t
dns_zone_isforced(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_FORCEXFER));
}
isc_result_t
dns_zone_setstatistics(dns_zone_t *zone, isc_boolean_t on) {
/*
* This function is obsoleted.
*/
UNUSED(zone);
UNUSED(on);
return (ISC_R_NOTIMPLEMENTED);
}
isc_uint64_t *
dns_zone_getstatscounters(dns_zone_t *zone) {
/*
* This function is obsoleted.
*/
UNUSED(zone);
return (NULL);
}
void
dns_zone_setstats(dns_zone_t *zone, isc_stats_t *stats) {
REQUIRE(DNS_ZONE_VALID(zone));
REQUIRE(zone->stats == NULL);
LOCK_ZONE(zone);
zone->stats = NULL;
isc_stats_attach(stats, &zone->stats);
UNLOCK_ZONE(zone);
}
void
dns_zone_setrequeststats(dns_zone_t *zone, isc_stats_t *stats) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
if (zone->requeststats_on && stats == NULL)
zone->requeststats_on = ISC_FALSE;
else if (!zone->requeststats_on && stats != NULL) {
if (zone->requeststats == NULL) {
isc_stats_attach(stats, &zone->requeststats);
zone->requeststats_on = ISC_TRUE;
}
}
UNLOCK_ZONE(zone);
return;
}
isc_stats_t *
dns_zone_getrequeststats(dns_zone_t *zone) {
/*
* We don't lock zone for efficiency reason. This is not catastrophic
* because requeststats must always be valid when requeststats_on is
* true.
* Some counters may be incremented while requeststats_on is becoming
* false, or some cannot be incremented just after the statistics are
* installed, but it shouldn't matter much in practice.
*/
if (zone->requeststats_on)
return (zone->requeststats);
else
return (NULL);
}
void
dns_zone_dialup(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
zone_debuglog(zone, "dns_zone_dialup", 3,
"notify = %d, refresh = %d",
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY),
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH));
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALNOTIFY))
dns_zone_notify(zone);
if (zone->type != dns_zone_master &&
DNS_ZONE_FLAG(zone, DNS_ZONEFLG_DIALREFRESH))
dns_zone_refresh(zone);
}
void
dns_zone_setdialup(dns_zone_t *zone, dns_dialuptype_t dialup) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
DNS_ZONE_CLRFLAG(zone, DNS_ZONEFLG_DIALNOTIFY |
DNS_ZONEFLG_DIALREFRESH |
DNS_ZONEFLG_NOREFRESH);
switch (dialup) {
case dns_dialuptype_no:
break;
case dns_dialuptype_yes:
DNS_ZONE_SETFLAG(zone, (DNS_ZONEFLG_DIALNOTIFY |
DNS_ZONEFLG_DIALREFRESH |
DNS_ZONEFLG_NOREFRESH));
break;
case dns_dialuptype_notify:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALNOTIFY);
break;
case dns_dialuptype_notifypassive:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALNOTIFY);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH);
break;
case dns_dialuptype_refresh:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_DIALREFRESH);
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH);
break;
case dns_dialuptype_passive:
DNS_ZONE_SETFLAG(zone, DNS_ZONEFLG_NOREFRESH);
break;
default:
INSIST(0);
}
UNLOCK_ZONE(zone);
}
isc_result_t
dns_zone_setkeydirectory(dns_zone_t *zone, const char *directory) {
isc_result_t result = ISC_R_SUCCESS;
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
result = dns_zone_setstring(zone, &zone->keydirectory, directory);
UNLOCK_ZONE(zone);
return (result);
}
const char *
dns_zone_getkeydirectory(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->keydirectory);
}
unsigned int
dns_zonemgr_getcount(dns_zonemgr_t *zmgr, int state) {
dns_zone_t *zone;
unsigned int count = 0;
REQUIRE(DNS_ZONEMGR_VALID(zmgr));
RWLOCK(&zmgr->rwlock, isc_rwlocktype_read);
switch (state) {
case DNS_ZONESTATE_XFERRUNNING:
for (zone = ISC_LIST_HEAD(zmgr->xfrin_in_progress);
zone != NULL;
zone = ISC_LIST_NEXT(zone, statelink))
count++;
break;
case DNS_ZONESTATE_XFERDEFERRED:
for (zone = ISC_LIST_HEAD(zmgr->waiting_for_xfrin);
zone != NULL;
zone = ISC_LIST_NEXT(zone, statelink))
count++;
break;
case DNS_ZONESTATE_SOAQUERY:
for (zone = ISC_LIST_HEAD(zmgr->zones);
zone != NULL;
zone = ISC_LIST_NEXT(zone, link))
if (DNS_ZONE_FLAG(zone, DNS_ZONEFLG_REFRESH))
count++;
break;
case DNS_ZONESTATE_ANY:
for (zone = ISC_LIST_HEAD(zmgr->zones);
zone != NULL;
zone = ISC_LIST_NEXT(zone, link)) {
dns_view_t *view = zone->view;
if (view != NULL && strcmp(view->name, "_bind") == 0)
continue;
count++;
}
break;
default:
INSIST(0);
}
RWUNLOCK(&zmgr->rwlock, isc_rwlocktype_read);
return (count);
}
isc_result_t
dns_zone_checknames(dns_zone_t *zone, dns_name_t *name, dns_rdata_t *rdata) {
isc_boolean_t ok = ISC_TRUE;
isc_boolean_t fail = ISC_FALSE;
char namebuf[DNS_NAME_FORMATSIZE];
char namebuf2[DNS_NAME_FORMATSIZE];
char typebuf[DNS_RDATATYPE_FORMATSIZE];
int level = ISC_LOG_WARNING;
dns_name_t bad;
REQUIRE(DNS_ZONE_VALID(zone));
if (!DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMES))
return (ISC_R_SUCCESS);
if (DNS_ZONE_OPTION(zone, DNS_ZONEOPT_CHECKNAMESFAIL)) {
level = ISC_LOG_ERROR;
fail = ISC_TRUE;
}
ok = dns_rdata_checkowner(name, rdata->rdclass, rdata->type, ISC_TRUE);
if (!ok) {
dns_name_format(name, namebuf, sizeof(namebuf));
dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf));
dns_zone_log(zone, level, "%s/%s: %s", namebuf, typebuf,
dns_result_totext(DNS_R_BADOWNERNAME));
if (fail)
return (DNS_R_BADOWNERNAME);
}
dns_name_init(&bad, NULL);
ok = dns_rdata_checknames(rdata, name, &bad);
if (!ok) {
dns_name_format(name, namebuf, sizeof(namebuf));
dns_name_format(&bad, namebuf2, sizeof(namebuf2));
dns_rdatatype_format(rdata->type, typebuf, sizeof(typebuf));
dns_zone_log(zone, level, "%s/%s: %s: %s ", namebuf, typebuf,
namebuf2, dns_result_totext(DNS_R_BADNAME));
if (fail)
return (DNS_R_BADNAME);
}
return (ISC_R_SUCCESS);
}
void
dns_zone_setcheckmx(dns_zone_t *zone, dns_checkmxfunc_t checkmx) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->checkmx = checkmx;
}
void
dns_zone_setchecksrv(dns_zone_t *zone, dns_checksrvfunc_t checksrv) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->checksrv = checksrv;
}
void
dns_zone_setcheckns(dns_zone_t *zone, dns_checknsfunc_t checkns) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->checkns = checkns;
}
void
dns_zone_setisself(dns_zone_t *zone, dns_isselffunc_t isself, void *arg) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->isself = isself;
zone->isselfarg = arg;
UNLOCK_ZONE(zone);
}
void
dns_zone_setnotifydelay(dns_zone_t *zone, isc_uint32_t delay) {
REQUIRE(DNS_ZONE_VALID(zone));
LOCK_ZONE(zone);
zone->notifydelay = delay;
UNLOCK_ZONE(zone);
}
isc_uint32_t
dns_zone_getnotifydelay(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->notifydelay);
}
isc_result_t
dns_zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm,
isc_uint16_t keyid, isc_boolean_t delete)
{
isc_result_t result;
REQUIRE(DNS_ZONE_VALID(zone));
dns_zone_log(zone, ISC_LOG_NOTICE,
"dns_zone_signwithkey(algorithm=%u, keyid=%u)",
algorithm, keyid);
LOCK_ZONE(zone);
result = zone_signwithkey(zone, algorithm, keyid, delete);
UNLOCK_ZONE(zone);
return (result);
}
static const char *hex = "0123456789ABCDEF";
isc_result_t
dns_zone_addnsec3chain(dns_zone_t *zone, dns_rdata_nsec3param_t *nsec3param) {
isc_result_t result;
char salt[255*2+1];
unsigned int i, j;
REQUIRE(DNS_ZONE_VALID(zone));
if (nsec3param->salt_length != 0) {
INSIST((nsec3param->salt_length * 2U) < sizeof(salt));
for (i = 0, j = 0; i < nsec3param->salt_length; i++) {
salt[j++] = hex[(nsec3param->salt[i] >> 4) & 0xf];
salt[j++] = hex[nsec3param->salt[i] & 0xf];
}
salt[j] = '\0';
} else
strcpy(salt, "-");
dns_zone_log(zone, ISC_LOG_NOTICE,
"dns_zone_addnsec3chain(hash=%u, iterations=%u, salt=%s)",
nsec3param->hash, nsec3param->iterations,
salt);
LOCK_ZONE(zone);
result = zone_addnsec3chain(zone, nsec3param);
UNLOCK_ZONE(zone);
return (result);
}
void
dns_zone_setnodes(dns_zone_t *zone, isc_uint32_t nodes) {
REQUIRE(DNS_ZONE_VALID(zone));
if (nodes == 0)
nodes = 1;
zone->nodes = nodes;
}
void
dns_zone_setsignatures(dns_zone_t *zone, isc_uint32_t signatures) {
REQUIRE(DNS_ZONE_VALID(zone));
/*
* We treat signatures as a signed value so explicitly
* limit its range here.
*/
if (signatures > ISC_INT32_MAX)
signatures = ISC_INT32_MAX;
else if (signatures == 0)
signatures = 1;
zone->signatures = signatures;
}
void
dns_zone_setprivatetype(dns_zone_t *zone, dns_rdatatype_t type) {
REQUIRE(DNS_ZONE_VALID(zone));
zone->privatetype = type;
}
dns_rdatatype_t
dns_zone_getprivatetype(dns_zone_t *zone) {
REQUIRE(DNS_ZONE_VALID(zone));
return (zone->privatetype);
}
static isc_result_t
zone_signwithkey(dns_zone_t *zone, dns_secalg_t algorithm, isc_uint16_t keyid,
isc_boolean_t delete)
{
dns_signing_t *signing;
dns_signing_t *current;
isc_result_t result = ISC_R_SUCCESS;
isc_time_t now;
signing = isc_mem_get(zone->mctx, sizeof *signing);
if (signing == NULL)
return (ISC_R_NOMEMORY);
signing->magic = 0;
signing->db = NULL;
signing->dbiterator = NULL;
signing->algorithm = algorithm;
signing->keyid = keyid;
signing->delete = delete;
signing->done = ISC_FALSE;
TIME_NOW(&now);
for (current = ISC_LIST_HEAD(zone->signing);
current != NULL;
current = ISC_LIST_NEXT(current, link)) {
if (current->db == zone->db &&
current->algorithm == signing->algorithm &&
current->keyid == signing->keyid) {
if (current->delete != signing->delete)
current->done = ISC_TRUE;
else
goto cleanup;
}
}
if (zone->db != NULL) {
dns_db_attach(zone->db, &signing->db);
result = dns_db_createiterator(signing->db, 0,
&signing->dbiterator);
if (result == ISC_R_SUCCESS)
result = dns_dbiterator_first(signing->dbiterator);
if (result == ISC_R_SUCCESS) {
dns_dbiterator_pause(signing->dbiterator);
ISC_LIST_INITANDAPPEND(zone->signing, signing, link);
signing = NULL;
if (isc_time_isepoch(&zone->signingtime)) {
zone->signingtime = now;
if (zone->task != NULL)
zone_settimer(zone, &now);
}
}
} else
result = ISC_R_NOTFOUND;
cleanup:
if (signing != NULL) {
if (signing->db != NULL)
dns_db_detach(&signing->db);
if (signing->dbiterator != NULL)
dns_dbiterator_destroy(&signing->dbiterator);
isc_mem_put(zone->mctx, signing, sizeof *signing);
}
return (result);
}
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