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55d7029049
freebsd-dev/contrib/bind/bin/named/ns_defs.h
Doug Barton 55d7029049 Import of ISC BIND version 8.3.6. 
Version 8.3.5 was skipped due to bugs fixed in this version.
2003-06-17 08:25:13 +00:00

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/*
* from ns.h 4.33 (Berkeley) 8/23/90
* $Id: ns_defs.h,v 8.124.6.1 2003/06/02 09:56:34 marka Exp $
*/
/*
* Copyright (c) 1986
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and 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, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION 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.
*/
/*
* Portions Copyright (c) 1996-2000 by Internet Software Consortium.
*
* Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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.
*/
/*
* Portions Copyright (c) 1999 by Check Point Software Technologies, Inc.
*
* Permission to use, copy, modify, and 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, and that
* the name of Check Point Software Technologies Incorporated not be used
* in advertising or publicity pertaining to distribution of the document
* or software without specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND CHECK POINT SOFTWARE TECHNOLOGIES
* INCORPORATED DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL CHECK POINT SOFTWARE TECHNOLOGIES INCORPRATED
* 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.
*/
/*
* Global definitions for the name server.
*/
/*
* Effort has been expended here to make all structure members 32 bits or
* larger land on 32-bit boundaries; smaller structure members have been
* deliberately shuffled and smaller integer sizes chosen where possible
* to make sure this happens. This is all meant to avoid structure member
* padding which can cost a _lot_ of memory when you have hundreds of
* thousands of entries in your cache.
*/
/*
* Timeout time should be around 1 minute or so. Using the
* the current simplistic backoff strategy, the sequence
* retrys after 4, 8, and 16 seconds. With 3 servers, this
* dies out in a little more than a minute.
* (sequence RETRYBASE, 2*RETRYBASE, 4*RETRYBASE... for MAXRETRY)
*/
#define NEWZONES 64 /* how many zones to grow the zone table by */
#define INITIALZONES NEWZONES /* how many zones are allocated initially */
#define MINROOTS 2 /* min number of root hints */
#define NSMAX 16 /* max number of NS addrs to try ([0..255]) */
#define RETRYBASE 4 /* base time between retries */
#define MAXCLASS 255 /* XXX - may belong elsewhere */
#define MAXRETRY 3 /* max number of retries per addr */
#define MAXCNAMES 8 /* max # of CNAMES tried per addr */
#define MAXQUERIES 20 /* max # of queries to be made */
#define MAXQSERIAL 4 /* max # of outstanding QSERIAL's */
/* (prevent "recursive" loops) */
#define INIT_REFRESH 600 /* retry time for initial slave */
/* contact (10 minutes) */
#define MIN_REFRESH 2 /* never refresh more frequently than once */
/* every MIN_REFRESH seconds */
#define MIN_RETRY 1 /* never retry more frequently than once */
/* every MIN_RETRY seconds */
#define MAX_REFRESH 2419200 /* perform a refresh query at least */
/* every 4 weeks*/
#define MAX_RETRY 1209600 /* perform a retry after no more than 2 weeks */
#define MAX_EXPIRE 31536000 /* expire a zone if we have not talked to */
/* the primary in 1 year */
#define NADDRECS 20 /* max addt'l rr's per resp */
#define XFER_TIMER 120 /* named-xfer's connect timeout */
#define MAX_XFER_TIME 60*60*2 /* default max seconds for an xfer */
#define XFER_TIME_FUDGE 10 /* MAX_XFER_TIME fudge */
#define MAX_XFERS_RUNNING 20 /* max value of transfers_in */
#define DEFAULT_XFERS_RUNNING 10 /* default value of transfers_in */
#define DEFAULT_XFERS_PER_NS 2 /* default # of xfers per peer nameserver */
#define XFER_BUFSIZE (16*1024) /* arbitrary but bigger than most MTU's */
#define MAX_SYNCDELAY 3 /* Presumed timeout in use by our clients. */
#define MAX_SYNCDRAIN 100000 /* How long we'll spin in drain_all_rcvbuf. */
#define MAX_SYNCSTORE 500
#define NS_MAX_DISTANCE 3 /* maximum nameserver chaining before failure */
/* maximum time to cache negative answers */
#define DEFAULT_MAX_NCACHE_TTL (3*60*60)
#define ALPHA 0.7 /* How much to preserve of old response time */
#define BETA 1.2 /* How much to penalize response time on failure */
#define GAMMA 0.98 /* How much to decay unused response times */
/* What maintainance operations need to be performed sometime soon? */
typedef enum need {
main_need_zreload = 0, /* ns_zreload() needed. */
main_need_reload, /* ns_reload() needed. */
main_need_reconfig, /* ns_reconfig() needed. */
main_need_endxfer, /* endxfer() needed. */
main_need_zoneload, /* loadxfer() needed. */
main_need_dump, /* doadump() needed. */
main_need_statsdump, /* ns_stats() needed. */
main_need_statsdumpandclear, /* ns_stats() needed. */
main_need_exit, /* exit() needed. */
main_need_qrylog, /* toggle_qrylog() needed. */
main_need_debug, /* use_desired_debug() needed. */
main_need_restart, /* exec() needed. */
main_need_reap, /* need to reap dead children. */
main_need_noexpired, /* ns_reconfig() needed w/ noexpired set. */
main_need_tryxfer, /* attemt to start a zone transfer. */
main_need_num /* MUST BE LAST. */
} main_need;
/* What global options are set? */
#define OPTION_NORECURSE 0x00000001 /* Don't recurse even if asked. */
#define OPTION_NOFETCHGLUE 0x00000002 /* Don't fetch missing glue. */
#define OPTION_FORWARD_ONLY 0x00000004 /* Don't use NS RR's, just forward. */
#define OPTION_FAKE_IQUERY 0x00000008 /* Fake up bogus response to IQUERY. */
#ifdef BIND_NOTIFY
/* #define OPTION_NONOTIFY 0x00000010 */ /* Turn off notify */
#define OPTION_SUPNOTIFY_INITIAL 0x00000020 /* Supress initial notify */
#endif
#define OPTION_NONAUTH_NXDOMAIN 0x00000040 /* Generate non-auth NXDOMAINs? */
#define OPTION_MULTIPLE_CNAMES 0x00000080 /* Allow a name to have multiple
* CNAME RRs */
#define OPTION_HOSTSTATS 0x00000100 /* Maintain per-host statistics? */
#define OPTION_DEALLOC_ON_EXIT 0x00000200 /* Deallocate everything on exit? */
#define OPTION_NODIALUP 0x00000400 /* Turn off dialup support */
#define OPTION_NORFC2308_TYPE1 0x00000800 /* Prevent type1 respones (RFC 2308)
* to cached negative respones */
#define OPTION_USE_ID_POOL 0x00001000 /* Use the memory hogging query ID */
#define OPTION_TREAT_CR_AS_SPACE 0x00002000 /* Treat CR in zone files as
* space */
#define OPTION_USE_IXFR 0x00004000 /* Use by default ixfr in zone
* transfer */
#define OPTION_MAINTAIN_IXFR_BASE 0x00008000 /* Part of IXFR file name logic. */
#define OPTION_HITCOUNT 0x00010000 /* Keep track of each time an
* RR gets hit in the database */
#define DEFAULT_OPTION_FLAGS (OPTION_NODIALUP|OPTION_NONAUTH_NXDOMAIN|\
OPTION_USE_ID_POOL|OPTION_NORFC2308_TYPE1)
#ifdef BIND_UPDATE
#define SOAINCRINTVL 300 /* default value for the time after which
* the zone serial number must be incremented
* after a successful update has occurred */
#define DUMPINTVL 3600 /* default interval at which to dump changed zones
* randomized, not exact */
#define DEFERUPDCNT 100 /* default number of updates that can happen
* before the zone serial number will be
* incremented */
#define UPDATE_TIMER XFER_TIMER
#endif /* BIND_UPDATE */
#define USE_MINIMUM 0xffffffff
#define MAXIMUM_TTL 0x7fffffff
#define CLEAN_TIMER 0x01
#define INTERFACE_TIMER 0x02
#define STATS_TIMER 0x04
#define HEARTBEAT_TIMER 0x08
/* IP address accessor, network byte order. */
#define ina_ulong(ina) (ina.s_addr)
/* IP address accessor, host byte order, read only. */
#define ina_hlong(ina) ntohl(ina.s_addr)
/* IP address equality. */
/* XXX: assumes that network byte order won't affect equality. */
#define ina_equal(a, b) (ina_ulong(a) == ina_ulong(b))
/* IP address equality with a mask. */
#define ina_onnet(h, n, m) ((ina_ulong(h) & ina_ulong(m)) == ina_ulong(n))
/* Sequence space arithmetic. */
#define SEQ_GT(a,b) ((int32_t)((a)-(b)) > 0)
#define SEQ_LT(a,b) ((int32_t)((a)-(b)) < 0)
#define NS_OPTION_P(option) ((server_options == NULL) ? \
(panic(panic_msg_no_options, NULL), 0) : \
((server_options->flags & option) != 0))
#define NS_ZOPTION_P(zp, option) \
(((zp) != NULL && (((zp)->z_optset & option) != 0)) ? \
(((zp)->z_options & option) != 0) : NS_OPTION_P(option))
#define NS_ZFWDTAB(zp) (((zp) == NULL) ? \
server_options->fwdtab : (zp)->z_fwdtab)
#define NS_INCRSTAT(addr, which) \
do { \
if ((int)which >= (int)nssLast) \
ns_panic(ns_log_insist, 1, panic_msg_bad_which, \
__FILE__, __LINE__, #which); \
else { \
if (NS_OPTION_P(OPTION_HOSTSTATS)) { \
struct nameser *ns = \
nameserFind(addr, NS_F_INSERT); \
if (ns != NULL) \
ns->stats[(int)which]++; \
} \
globalStats[(int)which]++; \
} \
} while (0)
enum severity { ignore, warn, fail, not_set };
#ifdef BIND_NOTIFY
enum notify { notify_use_default=0, notify_yes, notify_no, notify_explicit };
#endif
enum zdialup { zdialup_use_default=0, zdialup_yes, zdialup_no };
enum axfr_format { axfr_use_default=0, axfr_one_answer, axfr_many_answers };
struct ip_match_direct {
struct in_addr address;
struct in_addr mask;
};
struct ip_match_indirect {
struct ip_match_list *list;
};
struct ip_match_key {
struct dst_key *key;
};
typedef enum { ip_match_pattern, ip_match_indirect, ip_match_localhost,
ip_match_localnets, ip_match_key } ip_match_type;
typedef struct ip_match_element {
ip_match_type type;
u_int flags;
union {
struct ip_match_direct direct;
struct ip_match_indirect indirect;
struct ip_match_key key;
} u;
struct ip_match_element *next;
} *ip_match_element;
/* Flags for ip_match_element */
#define IP_MATCH_NEGATE 0x01 /* match means deny access */
typedef struct ip_match_list {
ip_match_element first;
ip_match_element last;
} *ip_match_list;
typedef struct ztimer_info {
char *name;
int class;
int type;
} *ztimer_info;
/*
* These fields are ordered to maintain word-alignment;
* be careful about changing them.
*/
struct zoneinfo {
char *z_origin; /* root domain name of zone */
time_t z_time; /* time for next refresh */
time_t z_lastupdate; /* time of last soa serial increment */
u_int32_t z_refresh; /* refresh interval */
u_int32_t z_retry; /* refresh retry interval */
u_int32_t z_expire; /* expiration time for cached info */
u_int32_t z_minimum; /* minimum TTL value */
u_int32_t z_serial; /* changes if zone modified */
char *z_source; /* source location of data */
time_t z_ftime; /* modification time of source file */
struct in_addr z_axfr_src; /* bind() the axfr socket to this */
struct in_addr z_addr[NSMAX]; /* list of master servers for zone */
struct dst_key * z_keys[NSMAX]; /* tsig key associated with master */
u_char z_addrcnt; /* number of entries in z_addr[] */
struct in_addr z_xaddr[NSMAX]; /* list of master servers for xfer */
u_char z_xaddrcnt; /* number of entries in z_xaddr[] */
u_char z_type; /* type of zone; see below */
u_int32_t z_flags; /* state bits; see below */
pid_t z_xferpid; /* xfer child pid */
u_int z_options; /* options set specific to this zone */
u_int z_optset; /* which opts override global opts */
int z_class; /* class of zone */
int z_numxfrs; /* Ref count of concurrent xfrs. */
enum severity z_checknames; /* How to handle non-RFC-compliant names */
#ifdef BIND_UPDATE
time_t z_dumptime; /* randomized time for next zone dump
* if Z_NEED_DUMP is set */
u_int32_t z_dumpintvl; /* time interval between zone dumps */
time_t z_soaincrintvl; /* interval for updating soa serial */
time_t z_soaincrtime; /* time for soa increment */
u_int32_t z_deferupdcnt; /* max number of updates before SOA
* serial number incremented */
u_int32_t z_updatecnt; /* number of update requests processed
* since the last SOA serial update */
char *z_updatelog; /* log file for updates */
#endif
ip_match_list z_update_acl; /* list of who can issue dynamic
updates */
ip_match_list z_query_acl; /* sites we'll answer questions for */
ip_match_list z_transfer_acl; /* sites that may get a zone transfer
from us */
long z_max_transfer_time_in; /* max num seconds for AXFR */
#ifdef BIND_NOTIFY
enum notify z_notify; /* Notify mode */
struct in_addr *z_also_notify; /* More nameservers to notify */
int z_notify_count;
#endif
enum zdialup z_dialup; /* secondaries over a dialup link */
char *z_ixfr_base; /* where to find the history of the zone */
char *z_ixfr_tmp; /* tmp file for the ixfr */
int z_maintain_ixfr_base;
long z_max_log_size_ixfr;
u_int32_t z_serial_ixfr_start;
evTimerID z_timer; /* maintenance timer */
ztimer_info z_timerinfo; /* UAP associated with timer */
time_t z_nextmaint; /* time of next maintenance */
u_int16_t z_port; /* perform AXFR to this port */
struct fwdinfo *z_fwdtab; /* zone-specific forwarders */
LINK(struct zoneinfo) z_freelink; /* if it's on the free list. */
LINK(struct zoneinfo) z_reloadlink; /* if it's on the reload list. */
};
/* zone types (z_type) */
enum zonetype { z_nil, z_master, z_slave, z_hint, z_stub, z_forward,
z_cache, z_any };
#define Z_NIL z_nil /* XXX */
#define Z_MASTER z_master /* XXX */
#define Z_PRIMARY z_master /* XXX */
#define Z_SLAVE z_slave /* XXX */
#define Z_SECONDARY z_slave /* XXX */
#define Z_HINT z_hint /* XXX */
#define Z_CACHE z_cache /* XXX */
#define Z_STUB z_stub /* XXX */
#define Z_FORWARD z_forward /* XXX */
#define Z_ANY z_any /* XXX*2 */
/* zone state bits (32 bits) */
#define Z_AUTH 0x00000001 /* zone is authoritative */
#define Z_NEED_XFER 0x00000002 /* waiting to do xfer */
#define Z_XFER_RUNNING 0x00000004 /* asynch. xfer is running */
#define Z_NEED_RELOAD 0x00000008 /* waiting to do reload */
#define Z_SYSLOGGED 0x00000010 /* have logged timeout */
#define Z_QSERIAL 0x00000020 /* sysquery()'ing for serial number */
#define Z_FOUND 0x00000040 /* found in boot file when reloading */
#define Z_INCLUDE 0x00000080 /* set if include used in file */
#define Z_DB_BAD 0x00000100 /* errors when loading file */
#define Z_TMP_FILE 0x00000200 /* backup file for xfer is temporary */
#ifdef BIND_UPDATE
#define Z_DYNAMIC 0x00000400 /* allow dynamic updates */
#define Z_NEED_DUMP 0x00000800 /* zone has changed, needs a dump */
#define Z_NEED_SOAUPDATE 0x00001000 /* soa serial number needs increment */
#endif /* BIND_UPDATE */
#define Z_XFER_ABORTED 0x00002000 /* zone transfer has been aborted */
#define Z_XFER_GONE 0x00004000 /* zone transfer process is gone */
#define Z_TIMER_SET 0x00008000 /* z_timer contains a valid id */
#ifdef BIND_NOTIFY
#define Z_NOTIFY 0x00010000 /* has an outbound notify executing */
#endif
#define Z_NEED_QSERIAL 0x00020000 /* we need to re-call qserial() */
#define Z_PARENT_RELOAD 0x00040000 /* we need to reload this as parent */
#define Z_FORWARD_SET 0x00080000 /* has forwarders been set */
#define Z_EXPIRED 0x00100000 /* expire timer has gone off */
#define Z_NEEDREFRESH 0x00200000 /* need to perform a refresh check */
/* named_xfer exit codes */
#define XFER_UPTODATE 0 /* zone is up-to-date */
#define XFER_SUCCESS 1 /* performed transfer successfully */
#define XFER_TIMEOUT 2 /* no server reachable/xfer timeout */
#define XFER_FAIL 3 /* other failure, has been logged */
#define XFER_SUCCESSAXFR 4 /* named-xfr recived a xfr */
#define XFER_SUCCESSIXFR 5 /* named-xfr recived a ixfr */
#define XFER_SUCCESSAXFRIXFRFILE 6 /* named-xfr received AXFR for IXFR */
#define XFER_REFUSED 7 /* one master returned REFUSED */
#define XFER_ISAXFR -1 /* the last XFR is AXFR */
#define XFER_ISIXFR -2 /* the last XFR is IXFR */
#define XFER_ISAXFRIXFR -3 /* the last XFR is AXFR but we must create IXFR base */
struct qserv {
struct sockaddr_in
ns_addr; /* address of NS */
struct databuf *ns; /* databuf for NS record */
struct databuf *nsdata; /* databuf for server address */
struct timeval stime; /* time first query started */
unsigned int forwarder:1; /* this entry is for a forwarder */
unsigned int noedns:1; /* don't try edns */
unsigned int lame:1; /* this server was lame, try it last */
unsigned int nretry:29; /* # of times addr retried */
u_int32_t serial; /* valid if Q_ZSERIAL */
};
/*
* Structure for recording info on forwarded or generated queries.
*/
struct qinfo {
u_int16_t q_id; /* id of query */
u_int16_t q_nsid; /* id of forwarded query */
struct sockaddr_in
q_from; /* requestor's address */
u_char *q_msg, /* the message */
*q_cmsg; /* the cname message */
int16_t q_msglen, /* len of message */
q_msgsize, /* allocated size of message */
q_cmsglen, /* len of cname message */
q_cmsgsize; /* allocated size of cname message */
int16_t q_dfd; /* UDP file descriptor */
u_int16_t q_udpsize; /* UDP message size */
int q_distance; /* distance this query is from the
* original query that the server
* received. */
time_t q_time; /* time to retry */
time_t q_expire; /* time to expire */
struct qinfo *q_next; /* rexmit list (sorted by time) */
struct qinfo *q_link; /* storage list (random order) */
struct databuf *q_usedns[NSMAX]; /* databuf for NS that we've tried */
struct qserv q_addr[NSMAX]; /* addresses of NS's */
#ifdef notyet
struct nameser *q_ns[NSMAX]; /* name servers */
#endif
struct dst_key *q_keys[NSMAX]; /* keys to use with this address */
u_char q_naddr; /* number of addr's in q_addr */
u_char q_curaddr; /* last addr sent to */
u_char q_nusedns; /* number of elements in q_usedns[] */
u_int8_t q_flags; /* see below */
int16_t q_cname; /* # of cnames found */
int16_t q_nqueries; /* # of queries required */
struct qstream *q_stream; /* TCP stream, null if UDP */
struct zoneinfo *q_zquery; /* Zone query is about (Q_ZSERIAL) */
struct zoneinfo *q_fzone; /* Forwarding zone, if any */
char *q_domain; /* domain of most enclosing zone cut */
char *q_name; /* domain of query */
u_int16_t q_class; /* class of query */
u_int16_t q_type; /* type of query */
#ifdef BIND_NOTIFY
int q_notifyzone; /* zone which needs another notify()
* when the reply to this comes in.
*/
#endif
struct tsig_record *q_tsig; /* forwarded query's TSIG record */
struct tsig_record *q_nstsig; /* forwarded query's TSIG record */
};
/* q_flags bits (8 bits) */
#define Q_SYSTEM 0x01 /* is a system query */
#define Q_PRIMING 0x02 /* generated during priming phase */
#define Q_ZSERIAL 0x04 /* getting zone serial for xfer test */
#define Q_USEVC 0x08 /* forward using tcp not udp */
#define Q_EDNS 0x10 /* add edns opt record to answer */
#define Q_NEXTADDR(qp,n) (&(qp)->q_addr[n].ns_addr)
#define RETRY_TIMEOUT 45
/*
* Return codes from ns_forw:
*/
#define FW_OK 0
#define FW_DUP 1
#define FW_NOSERVER 2
#define FW_SERVFAIL 3
typedef void (*sq_closure)(struct qstream *qs);
#ifdef BIND_UPDATE
struct fdlist {
int fd;
struct fdlist *next;
};
#endif
typedef struct ns_delta {
LINK(struct ns_delta) d_link;
ns_updque d_changes;
} ns_delta;
typedef LIST(ns_delta) ns_deltalist;
typedef struct _interface {
int dfd, /* Datagram file descriptor */
sfd; /* Stream file descriptor. */
time_t gen; /* Generation number. */
struct in_addr addr; /* Interface address. */
u_int16_t port; /* Interface port. */
u_int16_t flags; /* Valid bits for evXXXXID. */
evFileID evID_d; /* Datagram read-event. */
evConnID evID_s; /* Stream listen-event. */
LINK(struct _interface) link;
} interface;
#define INTERFACE_FILE_VALID 0x01
#define INTERFACE_CONN_VALID 0x02
#define INTERFACE_FORWARDING 0x04
struct qstream {
int s_rfd; /* stream file descriptor */
int s_size; /* expected amount of data to rcv */
int s_bufsize; /* amount of data received in s_buf */
u_char *s_buf; /* buffer of received data */
u_char *s_wbuf; /* send buffer */
u_char *s_wbuf_send; /* next sendable byte of send buffer */
u_char *s_wbuf_free; /* next free byte of send buffer */
u_char *s_wbuf_end; /* byte after end of send buffer */
sq_closure s_wbuf_closure; /* callback for writable descriptor */
struct qstream *s_next; /* next stream */
struct sockaddr_in
s_from; /* address query came from */
interface *s_ifp; /* interface query came from */
time_t s_time; /* time stamp of last transaction */
int s_refcnt; /* number of outstanding queries */
u_char s_temp[HFIXEDSZ];
#ifdef BIND_UPDATE
int s_opcode; /* type of request */
int s_linkcnt; /* number of client connections using
* this connection to forward updates
* to the primary */
struct fdlist *s_fds; /* linked list of connections to the
* primaries that have been used by
* the server to forward this client's
* update requests */
#endif
evStreamID evID_r; /* read event. */
evFileID evID_w; /* writable event handle. */
evConnID evID_c; /* connect event handle */
u_int flags; /* see below */
struct qstream_xfr {
enum { s_x_base, s_x_firstsoa, s_x_zone,
s_x_lastsoa, s_x_done, s_x_adding,
s_x_deleting, s_x_addsoa, s_x_deletesoa }
state; /* state of transfer. */
u_char *msg, /* current assembly message. */
*cp, /* where are we in msg? */
*eom, /* end of msg. */
*ptrs[128]; /* ptrs for dn_comp(). */
int class, /* class of an XFR. */
type, /* type of XFR. */
id, /* id of an XFR. */
opcode; /* opcode of an XFR. */
u_int zone; /* zone being XFR'd. */
union {
struct namebuf *axfr; /* top np of an AXFR. */
ns_deltalist *ixfr; /* top udp of an IXFR. */
} top;
int ixfr_zone;
u_int32_t serial; /* serial number requested in IXFR */
ns_tcp_tsig_state *tsig_state; /* used by ns_sign_tcp */
int tsig_skip; /* skip calling ns_sign_tcp
* during the next flush */
int tsig_size; /* need to reserve this space
* for the tsig. */
struct qs_x_lev { /* decompose the recursion. */
enum {sxl_ns, sxl_all, sxl_sub}
state; /* what's this level doing? */
int flags; /* see below (SXL_*). */
char dname[MAXDNAME];
struct namebuf *np, /* this node. */
*nnp, /* next node to process. */
**npp, /* subs. */
**npe; /* end of subs. */
struct databuf *dp; /* current rr. */
struct qs_x_lev *next; /* link. */
} *lev; /* LIFO. */
enum axfr_format transfer_format;
} xfr;
};
#define SXL_GLUING 0x01
#define SXL_ZONECUT 0x02
/* flags */
#define STREAM_MALLOC 0x01
#define STREAM_WRITE_EV 0x02
#define STREAM_READ_EV 0x04
#define STREAM_CONNECT_EV 0x08
#define STREAM_DONE_CLOSE 0x10
#define STREAM_AXFR 0x20
#define STREAM_AXFRIXFR 0x40
#define ALLOW_NETS 0x0001
#define ALLOW_HOSTS 0x0002
#define ALLOW_ALL (ALLOW_NETS | ALLOW_HOSTS)
struct fwddata {
struct sockaddr_in
fwdaddr; /* address of NS */
struct databuf *ns; /* databuf for NS record */
struct databuf *nsdata; /* databuf for server address */
int ref_count; /* how many users of this */
};
struct fwdinfo {
struct fwdinfo *next;
struct fwddata *fwddata;
};
enum nameserStats { nssRcvdR, /* sent us an answer */
nssRcvdNXD, /* sent us a negative response */
nssRcvdFwdR, /* sent us a response we had to fwd */
nssRcvdDupR, /* sent us an extra answer */
nssRcvdFail, /* sent us a SERVFAIL */
nssRcvdFErr, /* sent us a FORMERR */
nssRcvdErr, /* sent us some other error */
nssRcvdAXFR, /* sent us an AXFR */
nssRcvdLDel, /* sent us a lame delegation */
nssRcvdOpts, /* sent us some IP options */
nssSentSysQ, /* sent them a sysquery */
nssSentAns, /* sent them an answer */
nssSentFwdQ, /* fwdd a query to them */
nssSentDupQ, /* sent them a retry */
nssSendtoErr, /* error in sendto */
nssRcvdQ, /* sent us a query */
nssRcvdIQ, /* sent us an inverse query */
nssRcvdFwdQ, /* sent us a query we had to fwd */
nssRcvdDupQ, /* sent us a retry */
nssRcvdTCP, /* sent us a query using TCP */
nssSentFwdR, /* fwdd a response to them */
nssSentFail, /* sent them a SERVFAIL */
nssSentFErr, /* sent them a FORMERR */
nssSentNaAns, /* sent them a non autoritative answer */
nssSentNXD, /* sent them a negative response */
nssRcvdUQ, /* sent us an unapproved query */
nssRcvdURQ, /* sent us an unapproved recursive query */
nssRcvdUXFR, /* sent us an unapproved AXFR or IXFR */
nssRcvdUUpd, /* sent us an unapproved update */
nssLast };
struct nameser {
struct in_addr addr; /* key */
u_long stats[nssLast]; /* statistics */
#ifdef notyet
u_int32_t rtt; /* round trip time */
/* XXX - need to add more stuff from "struct qserv", and use our rtt */
u_int16_t flags; /* see below */
u_int8_t xfers; /* #/xfers running right now */
#endif
};
enum transport { primary_trans, secondary_trans, response_trans, update_trans,
num_trans };
/* types used by the parser or config routines */
typedef struct zone_config {
void *opaque;
} zone_config;
typedef struct listen_info {
u_short port;
ip_match_list list;
struct listen_info *next;
} *listen_info;
typedef struct listen_info_list {
listen_info first;
listen_info last;
} *listen_info_list;
#ifndef RLIMIT_TYPE
#define RLIMIT_TYPE u_long
#endif
typedef RLIMIT_TYPE rlimit_type;
struct control;
typedef struct control *control;
typedef LIST(struct control) controls;
enum ordering { unknown_order, fixed_order, cyclic_order, random_order };
#define DEFAULT_ORDERING cyclic_order
typedef struct rrset_order_element {
int class;
int type;
char *name;
enum ordering order;
struct rrset_order_element *next;
} *rrset_order_element ;
typedef struct rrset_order_list {
rrset_order_element first;
rrset_order_element last;
} *rrset_order_list;
typedef struct options {
u_int32_t flags;
char *hostname;
char *version;
char *directory;
char *dump_filename;
char *pid_filename;
char *stats_filename;
char *memstats_filename;
char *named_xfer;
int transfers_in;
int transfers_per_ns;
int transfers_out;
int serial_queries;
int max_log_size_ixfr;
enum axfr_format transfer_format;
long max_transfer_time_in;
struct sockaddr_in query_source;
struct in_addr axfr_src;
#ifdef BIND_NOTIFY
int notify_count;
struct in_addr *also_notify;
#endif
ip_match_list query_acl;
ip_match_list recursion_acl;
ip_match_list transfer_acl;
ip_match_list blackhole_acl;
ip_match_list topology;
ip_match_list sortlist;
enum severity check_names[num_trans];
u_long data_size;
u_long stack_size;
u_long core_size;
u_long files;
listen_info_list listen_list;
struct fwdinfo *fwdtab;
/* XXX need to add forward option */
int clean_interval;
int interface_interval;
int stats_interval;
rrset_order_list ordering;
int heartbeat_interval;
u_int max_ncache_ttl;
u_int max_host_stats;
u_int lame_ttl;
int minroots;
u_int16_t preferred_glue;
u_int16_t edns_udp_size;
enum notify notify;
} *options;
typedef struct key_list_element {
struct dst_key *key;
struct key_list_element *next;
} *key_list_element;
typedef struct key_info_list {
key_list_element first;
key_list_element last;
} *key_info_list;
typedef struct topology_config {
void *opaque;
} topology_config;
#define UNKNOWN_TOPOLOGY_DISTANCE 9998
#define MAX_TOPOLOGY_DISTANCE 9999
typedef struct topology_distance {
ip_match_list patterns;
struct topology_distance *next;
} *topology_distance;
typedef struct topology_context {
topology_distance first;
topology_distance last;
} *topology_context;
typedef struct acl_table_entry {
char *name;
ip_match_list list;
struct acl_table_entry *next;
} *acl_table_entry;
typedef struct server_config {
void *opaque;
} server_config;
#define SERVER_INFO_BOGUS 0x01
#define SERVER_INFO_SUPPORT_IXFR 0x02
#define SERVER_INFO_EDNS 0x04
typedef struct server_info {
struct in_addr address;
u_int flags;
int transfers;
enum axfr_format transfer_format;
key_info_list key_list;
/* could move statistics to here, too */
struct server_info *next;
} *server_info;
/*
* enum <--> name translation
*/
struct ns_sym {
int number; /* Identifying number, like ns_log_default */
const char * name; /* Its symbolic name, like "default" */
};
/*
* Logging options
*/
typedef enum ns_logging_categories {
ns_log_default = 0,
ns_log_config,
ns_log_parser,
ns_log_queries,
ns_log_lame_servers,
ns_log_statistics,
ns_log_panic,
ns_log_update,
ns_log_ncache,
ns_log_xfer_in,
ns_log_xfer_out,
ns_log_db,
ns_log_eventlib,
ns_log_packet,
#ifdef BIND_NOTIFY
ns_log_notify,
#endif
ns_log_cname,
ns_log_security,
ns_log_os,
ns_log_insist,
ns_log_maint,
ns_log_load,
ns_log_resp_checks,
ns_log_control,
ns_log_update_security,
ns_log_max_category
} ns_logging_categories;
typedef struct log_config {
log_context log_ctx;
log_channel eventlib_channel;
log_channel packet_channel;
int default_debug_active;
} *log_config;
struct map {
const char * token;
int val;
};
#define NOERROR_NODATA 15 /* only used internally by the server, used for
* -ve $ing non-existence of records. 15 is not
* a code used as yet anyway.
*/
#define NTTL 600 /* ttl for negative data: 10 minutes? */
#define VQEXPIRY 900 /* a VQ entry expires in 15*60 = 900 seconds */
#ifdef BIND_UPDATE
enum req_action { Finish, Refuse, Return };
#endif
#ifdef INIT
error "INIT already defined, check system include files"
#endif
#ifdef DECL
error "DECL already defined, check system include files"
#endif
#ifdef MAIN_PROGRAM
#define INIT(x) = x
#define DECL
#else
#define INIT(x)
#define DECL extern
#endif
#define EDNS_MESSAGE_SZ 4096
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