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freebsd-skq/contrib/bind9/bin/named/server.c
dougb f18a6196d7 Upgrade to BIND version 9.8.1. Release notes at: 
https://deepthought.isc.org/article/AA-00446/81/
or
/usr/src/contrib/bind9/

Approved by:	re (kib)
2011-09-03 07:13:45 +00:00

7630 lines
208 KiB
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/*
* Copyright (C) 2004-2011 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: server.c,v 1.599.8.12 2011-08-02 04:58:45 each Exp $ */
/*! \file */
#include <config.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <isc/app.h>
#include <isc/base64.h>
#include <isc/dir.h>
#include <isc/entropy.h>
#include <isc/file.h>
#include <isc/hash.h>
#include <isc/httpd.h>
#include <isc/lex.h>
#include <isc/parseint.h>
#include <isc/portset.h>
#include <isc/print.h>
#include <isc/resource.h>
#include <isc/sha2.h>
#include <isc/socket.h>
#include <isc/stat.h>
#include <isc/stats.h>
#include <isc/stdio.h>
#include <isc/string.h>
#include <isc/task.h>
#include <isc/timer.h>
#include <isc/util.h>
#include <isc/xml.h>
#include <isccfg/namedconf.h>
#include <bind9/check.h>
#include <dns/acache.h>
#include <dns/adb.h>
#include <dns/cache.h>
#include <dns/db.h>
#include <dns/dispatch.h>
#include <dns/dlz.h>
#include <dns/dns64.h>
#include <dns/forward.h>
#include <dns/journal.h>
#include <dns/keytable.h>
#include <dns/keyvalues.h>
#include <dns/lib.h>
#include <dns/master.h>
#include <dns/masterdump.h>
#include <dns/order.h>
#include <dns/peer.h>
#include <dns/portlist.h>
#include <dns/rbt.h>
#include <dns/rdataclass.h>
#include <dns/rdataset.h>
#include <dns/rdatastruct.h>
#include <dns/resolver.h>
#include <dns/rootns.h>
#include <dns/secalg.h>
#include <dns/stats.h>
#include <dns/tkey.h>
#include <dns/tsig.h>
#include <dns/view.h>
#include <dns/zone.h>
#include <dns/zt.h>
#include <dst/dst.h>
#include <dst/result.h>
#include <named/client.h>
#include <named/config.h>
#include <named/control.h>
#include <named/interfacemgr.h>
#include <named/log.h>
#include <named/logconf.h>
#include <named/lwresd.h>
#include <named/main.h>
#include <named/os.h>
#include <named/server.h>
#include <named/statschannel.h>
#include <named/tkeyconf.h>
#include <named/tsigconf.h>
#include <named/zoneconf.h>
#ifdef HAVE_LIBSCF
#include <named/ns_smf_globals.h>
#include <stdlib.h>
#endif
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
/*%
* Check an operation for failure. Assumes that the function
* using it has a 'result' variable and a 'cleanup' label.
*/
#define CHECK(op) \
do { result = (op); \
if (result != ISC_R_SUCCESS) goto cleanup; \
} while (0)
#define CHECKM(op, msg) \
do { result = (op); \
if (result != ISC_R_SUCCESS) { \
isc_log_write(ns_g_lctx, \
NS_LOGCATEGORY_GENERAL, \
NS_LOGMODULE_SERVER, \
ISC_LOG_ERROR, \
"%s: %s", msg, \
isc_result_totext(result)); \
goto cleanup; \
} \
} while (0) \
#define CHECKMF(op, msg, file) \
do { result = (op); \
if (result != ISC_R_SUCCESS) { \
isc_log_write(ns_g_lctx, \
NS_LOGCATEGORY_GENERAL, \
NS_LOGMODULE_SERVER, \
ISC_LOG_ERROR, \
"%s '%s': %s", msg, file, \
isc_result_totext(result)); \
goto cleanup; \
} \
} while (0) \
#define CHECKFATAL(op, msg) \
do { result = (op); \
if (result != ISC_R_SUCCESS) \
fatal(msg, result); \
} while (0) \
/*%
* Maximum ADB size for views that share a cache. Use this limit to suppress
* the total of memory footprint, which should be the main reason for sharing
* a cache. Only effective when a finite max-cache-size is specified.
* This is currently defined to be 8MB.
*/
#define MAX_ADB_SIZE_FOR_CACHESHARE 8388608
struct ns_dispatch {
isc_sockaddr_t addr;
unsigned int dispatchgen;
dns_dispatch_t *dispatch;
ISC_LINK(struct ns_dispatch) link;
};
struct ns_cache {
dns_cache_t *cache;
dns_view_t *primaryview;
isc_boolean_t needflush;
isc_boolean_t adbsizeadjusted;
ISC_LINK(ns_cache_t) link;
};
struct dumpcontext {
isc_mem_t *mctx;
isc_boolean_t dumpcache;
isc_boolean_t dumpzones;
FILE *fp;
ISC_LIST(struct viewlistentry) viewlist;
struct viewlistentry *view;
struct zonelistentry *zone;
dns_dumpctx_t *mdctx;
dns_db_t *db;
dns_db_t *cache;
isc_task_t *task;
dns_dbversion_t *version;
};
struct viewlistentry {
dns_view_t *view;
ISC_LINK(struct viewlistentry) link;
ISC_LIST(struct zonelistentry) zonelist;
};
struct zonelistentry {
dns_zone_t *zone;
ISC_LINK(struct zonelistentry) link;
};
/*%
* Configuration context to retain for each view that allows
* new zones to be added at runtime.
*/
struct cfg_context {
isc_mem_t * mctx;
cfg_parser_t * parser;
cfg_obj_t * config;
cfg_parser_t * nzparser;
cfg_obj_t * nzconfig;
cfg_aclconfctx_t * actx;
};
/*
* These zones should not leak onto the Internet.
*/
static const struct {
const char *zone;
isc_boolean_t rfc1918;
} empty_zones[] = {
/* RFC 1918 */
{ "10.IN-ADDR.ARPA", ISC_TRUE },
{ "16.172.IN-ADDR.ARPA", ISC_TRUE },
{ "17.172.IN-ADDR.ARPA", ISC_TRUE },
{ "18.172.IN-ADDR.ARPA", ISC_TRUE },
{ "19.172.IN-ADDR.ARPA", ISC_TRUE },
{ "20.172.IN-ADDR.ARPA", ISC_TRUE },
{ "21.172.IN-ADDR.ARPA", ISC_TRUE },
{ "22.172.IN-ADDR.ARPA", ISC_TRUE },
{ "23.172.IN-ADDR.ARPA", ISC_TRUE },
{ "24.172.IN-ADDR.ARPA", ISC_TRUE },
{ "25.172.IN-ADDR.ARPA", ISC_TRUE },
{ "26.172.IN-ADDR.ARPA", ISC_TRUE },
{ "27.172.IN-ADDR.ARPA", ISC_TRUE },
{ "28.172.IN-ADDR.ARPA", ISC_TRUE },
{ "29.172.IN-ADDR.ARPA", ISC_TRUE },
{ "30.172.IN-ADDR.ARPA", ISC_TRUE },
{ "31.172.IN-ADDR.ARPA", ISC_TRUE },
{ "168.192.IN-ADDR.ARPA", ISC_TRUE },
/* RFC 5735 and RFC 5737 */
{ "0.IN-ADDR.ARPA", ISC_FALSE }, /* THIS NETWORK */
{ "127.IN-ADDR.ARPA", ISC_FALSE }, /* LOOPBACK */
{ "254.169.IN-ADDR.ARPA", ISC_FALSE }, /* LINK LOCAL */
{ "2.0.192.IN-ADDR.ARPA", ISC_FALSE }, /* TEST NET */
{ "100.51.198.IN-ADDR.ARPA", ISC_FALSE }, /* TEST NET 2 */
{ "113.0.203.IN-ADDR.ARPA", ISC_FALSE }, /* TEST NET 3 */
{ "255.255.255.255.IN-ADDR.ARPA", ISC_FALSE }, /* BROADCAST */
/* Local IPv6 Unicast Addresses */
{ "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA", ISC_FALSE },
{ "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.ARPA", ISC_FALSE },
/* LOCALLY ASSIGNED LOCAL ADDRESS SCOPE */
{ "D.F.IP6.ARPA", ISC_FALSE },
{ "8.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
{ "9.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
{ "A.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
{ "B.E.F.IP6.ARPA", ISC_FALSE }, /* LINK LOCAL */
/* Example Prefix, RFC 3849. */
{ "8.B.D.0.1.0.0.2.IP6.ARPA", ISC_FALSE },
{ NULL, ISC_FALSE }
};
ISC_PLATFORM_NORETURN_PRE static void
fatal(const char *msg, isc_result_t result) ISC_PLATFORM_NORETURN_POST;
static void
ns_server_reload(isc_task_t *task, isc_event_t *event);
static isc_result_t
ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
cfg_aclconfctx_t *actx,
isc_mem_t *mctx, ns_listenelt_t **target);
static isc_result_t
ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
cfg_aclconfctx_t *actx,
isc_mem_t *mctx, ns_listenlist_t **target);
static isc_result_t
configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype);
static isc_result_t
configure_alternates(const cfg_obj_t *config, dns_view_t *view,
const cfg_obj_t *alternates);
static isc_result_t
configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
cfg_aclconfctx_t *aclconf, isc_boolean_t added);
static isc_result_t
add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx);
static void
end_reserved_dispatches(ns_server_t *server, isc_boolean_t all);
static void
newzone_cfgctx_destroy(void **cfgp);
/*%
* Configure a single view ACL at '*aclp'. Get its configuration from
* 'vconfig' (for per-view configuration) and maybe from 'config'
*/
static isc_result_t
configure_view_acl(const cfg_obj_t *vconfig, const cfg_obj_t *config,
const char *aclname, const char *acltuplename,
cfg_aclconfctx_t *actx, isc_mem_t *mctx, dns_acl_t **aclp)
{
isc_result_t result;
const cfg_obj_t *maps[3];
const cfg_obj_t *aclobj = NULL;
int i = 0;
if (*aclp != NULL)
dns_acl_detach(aclp);
if (vconfig != NULL)
maps[i++] = cfg_tuple_get(vconfig, "options");
if (config != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(config, "options", &options);
if (options != NULL)
maps[i++] = options;
}
maps[i] = NULL;
(void)ns_config_get(maps, aclname, &aclobj);
if (aclobj == NULL)
/*
* No value available. *aclp == NULL.
*/
return (ISC_R_SUCCESS);
if (acltuplename != NULL) {
/*
* If the ACL is given in an optional tuple, retrieve it.
* The parser should have ensured that a valid object be
* returned.
*/
aclobj = cfg_tuple_get(aclobj, acltuplename);
}
result = cfg_acl_fromconfig(aclobj, config, ns_g_lctx,
actx, mctx, 0, aclp);
return (result);
}
/*%
* Configure a sortlist at '*aclp'. Essentially the same as
* configure_view_acl() except it calls cfg_acl_fromconfig with a
* nest_level value of 2.
*/
static isc_result_t
configure_view_sortlist(const cfg_obj_t *vconfig, const cfg_obj_t *config,
cfg_aclconfctx_t *actx, isc_mem_t *mctx,
dns_acl_t **aclp)
{
isc_result_t result;
const cfg_obj_t *maps[3];
const cfg_obj_t *aclobj = NULL;
int i = 0;
if (*aclp != NULL)
dns_acl_detach(aclp);
if (vconfig != NULL)
maps[i++] = cfg_tuple_get(vconfig, "options");
if (config != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(config, "options", &options);
if (options != NULL)
maps[i++] = options;
}
maps[i] = NULL;
(void)ns_config_get(maps, "sortlist", &aclobj);
if (aclobj == NULL)
return (ISC_R_SUCCESS);
/*
* Use a nest level of 3 for the "top level" of the sortlist;
* this means each entry in the top three levels will be stored
* as lists of separate, nested ACLs, rather than merged together
* into IP tables as is usually done with ACLs.
*/
result = cfg_acl_fromconfig(aclobj, config, ns_g_lctx,
actx, mctx, 3, aclp);
return (result);
}
static isc_result_t
configure_view_nametable(const cfg_obj_t *vconfig, const cfg_obj_t *config,
const char *confname, const char *conftuplename,
isc_mem_t *mctx, dns_rbt_t **rbtp)
{
isc_result_t result;
const cfg_obj_t *maps[3];
const cfg_obj_t *obj = NULL;
const cfg_listelt_t *element;
int i = 0;
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t b;
const char *str;
const cfg_obj_t *nameobj;
if (*rbtp != NULL)
dns_rbt_destroy(rbtp);
if (vconfig != NULL)
maps[i++] = cfg_tuple_get(vconfig, "options");
if (config != NULL) {
const cfg_obj_t *options = NULL;
(void)cfg_map_get(config, "options", &options);
if (options != NULL)
maps[i++] = options;
}
maps[i] = NULL;
(void)ns_config_get(maps, confname, &obj);
if (obj == NULL)
/*
* No value available. *rbtp == NULL.
*/
return (ISC_R_SUCCESS);
if (conftuplename != NULL) {
obj = cfg_tuple_get(obj, conftuplename);
if (cfg_obj_isvoid(obj))
return (ISC_R_SUCCESS);
}
result = dns_rbt_create(mctx, NULL, NULL, rbtp);
if (result != ISC_R_SUCCESS)
return (result);
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
for (element = cfg_list_first(obj);
element != NULL;
element = cfg_list_next(element)) {
nameobj = cfg_listelt_value(element);
str = cfg_obj_asstring(nameobj);
isc_buffer_init(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
/*
* We don't need the node data, but need to set dummy data to
* avoid a partial match with an empty node. For example, if
* we have foo.example.com and bar.example.com, we'd get a match
* for baz.example.com, which is not the expected result.
* We simply use (void *)1 as the dummy data.
*/
result = dns_rbt_addname(*rbtp, name, (void *)1);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(nameobj, ns_g_lctx, ISC_LOG_ERROR,
"failed to add %s for %s: %s",
str, confname, isc_result_totext(result));
goto cleanup;
}
}
return (result);
cleanup:
dns_rbt_destroy(rbtp);
return (result);
}
static isc_result_t
dstkey_fromconfig(const cfg_obj_t *vconfig, const cfg_obj_t *key,
isc_boolean_t managed, dst_key_t **target, isc_mem_t *mctx)
{
dns_rdataclass_t viewclass;
dns_rdata_dnskey_t keystruct;
isc_uint32_t flags, proto, alg;
const char *keystr, *keynamestr;
unsigned char keydata[4096];
isc_buffer_t keydatabuf;
unsigned char rrdata[4096];
isc_buffer_t rrdatabuf;
isc_region_t r;
dns_fixedname_t fkeyname;
dns_name_t *keyname;
isc_buffer_t namebuf;
isc_result_t result;
dst_key_t *dstkey = NULL;
INSIST(target != NULL && *target == NULL);
flags = cfg_obj_asuint32(cfg_tuple_get(key, "flags"));
proto = cfg_obj_asuint32(cfg_tuple_get(key, "protocol"));
alg = cfg_obj_asuint32(cfg_tuple_get(key, "algorithm"));
keyname = dns_fixedname_name(&fkeyname);
keynamestr = cfg_obj_asstring(cfg_tuple_get(key, "name"));
if (managed) {
const char *initmethod;
initmethod = cfg_obj_asstring(cfg_tuple_get(key, "init"));
if (strcasecmp(initmethod, "initial-key") != 0) {
cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
"managed key '%s': "
"invalid initialization method '%s'",
keynamestr, initmethod);
result = ISC_R_FAILURE;
goto cleanup;
}
}
if (vconfig == NULL)
viewclass = dns_rdataclass_in;
else {
const cfg_obj_t *classobj = cfg_tuple_get(vconfig, "class");
CHECK(ns_config_getclass(classobj, dns_rdataclass_in,
&viewclass));
}
keystruct.common.rdclass = viewclass;
keystruct.common.rdtype = dns_rdatatype_dnskey;
/*
* The key data in keystruct is not dynamically allocated.
*/
keystruct.mctx = NULL;
ISC_LINK_INIT(&keystruct.common, link);
if (flags > 0xffff)
CHECKM(ISC_R_RANGE, "key flags");
if (proto > 0xff)
CHECKM(ISC_R_RANGE, "key protocol");
if (alg > 0xff)
CHECKM(ISC_R_RANGE, "key algorithm");
keystruct.flags = (isc_uint16_t)flags;
keystruct.protocol = (isc_uint8_t)proto;
keystruct.algorithm = (isc_uint8_t)alg;
isc_buffer_init(&keydatabuf, keydata, sizeof(keydata));
isc_buffer_init(&rrdatabuf, rrdata, sizeof(rrdata));
keystr = cfg_obj_asstring(cfg_tuple_get(key, "key"));
CHECK(isc_base64_decodestring(keystr, &keydatabuf));
isc_buffer_usedregion(&keydatabuf, &r);
keystruct.datalen = r.length;
keystruct.data = r.base;
if ((keystruct.algorithm == DST_ALG_RSASHA1 ||
keystruct.algorithm == DST_ALG_RSAMD5) &&
r.length > 1 && r.base[0] == 1 && r.base[1] == 3)
cfg_obj_log(key, ns_g_lctx, ISC_LOG_WARNING,
"%s key '%s' has a weak exponent",
managed ? "managed" : "trusted",
keynamestr);
CHECK(dns_rdata_fromstruct(NULL,
keystruct.common.rdclass,
keystruct.common.rdtype,
&keystruct, &rrdatabuf));
dns_fixedname_init(&fkeyname);
isc_buffer_init(&namebuf, keynamestr, strlen(keynamestr));
isc_buffer_add(&namebuf, strlen(keynamestr));
CHECK(dns_name_fromtext(keyname, &namebuf, dns_rootname, 0, NULL));
CHECK(dst_key_fromdns(keyname, viewclass, &rrdatabuf,
mctx, &dstkey));
*target = dstkey;
return (ISC_R_SUCCESS);
cleanup:
if (result == DST_R_NOCRYPTO) {
cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
"ignoring %s key for '%s': no crypto support",
managed ? "managed" : "trusted",
keynamestr);
} else if (result == DST_R_UNSUPPORTEDALG) {
cfg_obj_log(key, ns_g_lctx, ISC_LOG_WARNING,
"skipping %s key for '%s': %s",
managed ? "managed" : "trusted",
keynamestr, isc_result_totext(result));
} else {
cfg_obj_log(key, ns_g_lctx, ISC_LOG_ERROR,
"configuring %s key for '%s': %s",
managed ? "managed" : "trusted",
keynamestr, isc_result_totext(result));
result = ISC_R_FAILURE;
}
if (dstkey != NULL)
dst_key_free(&dstkey);
return (result);
}
static isc_result_t
load_view_keys(const cfg_obj_t *keys, const cfg_obj_t *vconfig,
dns_view_t *view, isc_boolean_t managed,
dns_name_t *keyname, isc_mem_t *mctx)
{
const cfg_listelt_t *elt, *elt2;
const cfg_obj_t *key, *keylist;
dst_key_t *dstkey = NULL;
isc_result_t result;
dns_keytable_t *secroots = NULL;
CHECK(dns_view_getsecroots(view, &secroots));
for (elt = cfg_list_first(keys);
elt != NULL;
elt = cfg_list_next(elt)) {
keylist = cfg_listelt_value(elt);
for (elt2 = cfg_list_first(keylist);
elt2 != NULL;
elt2 = cfg_list_next(elt2)) {
key = cfg_listelt_value(elt2);
result = dstkey_fromconfig(vconfig, key, managed,
&dstkey, mctx);
if (result == DST_R_UNSUPPORTEDALG) {
result = ISC_R_SUCCESS;
continue;
}
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* If keyname was specified, we only add that key.
*/
if (keyname != NULL &&
!dns_name_equal(keyname, dst_key_name(dstkey)))
{
dst_key_free(&dstkey);
continue;
}
CHECK(dns_keytable_add(secroots, managed, &dstkey));
}
}
cleanup:
if (dstkey != NULL)
dst_key_free(&dstkey);
if (secroots != NULL)
dns_keytable_detach(&secroots);
if (result == DST_R_NOCRYPTO)
result = ISC_R_SUCCESS;
return (result);
}
/*%
* Configure DNSSEC keys for a view.
*
* The per-view configuration values and the server-global defaults are read
* from 'vconfig' and 'config'.
*/
static isc_result_t
configure_view_dnsseckeys(dns_view_t *view, const cfg_obj_t *vconfig,
const cfg_obj_t *config, const cfg_obj_t *bindkeys,
isc_boolean_t auto_dlv, isc_boolean_t auto_root,
isc_mem_t *mctx)
{
isc_result_t result = ISC_R_SUCCESS;
const cfg_obj_t *view_keys = NULL;
const cfg_obj_t *global_keys = NULL;
const cfg_obj_t *view_managed_keys = NULL;
const cfg_obj_t *global_managed_keys = NULL;
const cfg_obj_t *maps[4];
const cfg_obj_t *voptions = NULL;
const cfg_obj_t *options = NULL;
const cfg_obj_t *obj = NULL;
const char *directory;
int i = 0;
/* We don't need trust anchors for the _bind view */
if (strcmp(view->name, "_bind") == 0 &&
view->rdclass == dns_rdataclass_chaos) {
return (ISC_R_SUCCESS);
}
if (vconfig != NULL) {
voptions = cfg_tuple_get(vconfig, "options");
if (voptions != NULL) {
(void) cfg_map_get(voptions, "trusted-keys",
&view_keys);
(void) cfg_map_get(voptions, "managed-keys",
&view_managed_keys);
maps[i++] = voptions;
}
}
if (config != NULL) {
(void)cfg_map_get(config, "trusted-keys", &global_keys);
(void)cfg_map_get(config, "managed-keys", &global_managed_keys);
(void)cfg_map_get(config, "options", &options);
if (options != NULL) {
maps[i++] = options;
}
}
maps[i++] = ns_g_defaults;
maps[i] = NULL;
result = dns_view_initsecroots(view, mctx);
if (result != ISC_R_SUCCESS) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"couldn't create keytable");
return (ISC_R_UNEXPECTED);
}
if (auto_dlv && view->rdclass == dns_rdataclass_in) {
const cfg_obj_t *builtin_keys = NULL;
const cfg_obj_t *builtin_managed_keys = NULL;
isc_log_write(ns_g_lctx, DNS_LOGCATEGORY_SECURITY,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"using built-in DLV key for view %s",
view->name);
/*
* If bind.keys exists, it overrides the managed-keys
* clause hard-coded in ns_g_config.
*/
if (bindkeys != NULL) {
(void)cfg_map_get(bindkeys, "trusted-keys",
&builtin_keys);
(void)cfg_map_get(bindkeys, "managed-keys",
&builtin_managed_keys);
} else {
(void)cfg_map_get(ns_g_config, "trusted-keys",
&builtin_keys);
(void)cfg_map_get(ns_g_config, "managed-keys",
&builtin_managed_keys);
}
if (builtin_keys != NULL)
CHECK(load_view_keys(builtin_keys, vconfig, view,
ISC_FALSE, view->dlv, mctx));
if (builtin_managed_keys != NULL)
CHECK(load_view_keys(builtin_managed_keys, vconfig,
view, ISC_TRUE, view->dlv, mctx));
}
if (auto_root && view->rdclass == dns_rdataclass_in) {
const cfg_obj_t *builtin_keys = NULL;
const cfg_obj_t *builtin_managed_keys = NULL;
isc_log_write(ns_g_lctx, DNS_LOGCATEGORY_SECURITY,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"using built-in root key for view %s",
view->name);
/*
* If bind.keys exists, it overrides the managed-keys
* clause hard-coded in ns_g_config.
*/
if (bindkeys != NULL) {
(void)cfg_map_get(bindkeys, "trusted-keys",
&builtin_keys);
(void)cfg_map_get(bindkeys, "managed-keys",
&builtin_managed_keys);
} else {
(void)cfg_map_get(ns_g_config, "trusted-keys",
&builtin_keys);
(void)cfg_map_get(ns_g_config, "managed-keys",
&builtin_managed_keys);
}
if (builtin_keys != NULL)
CHECK(load_view_keys(builtin_keys, vconfig, view,
ISC_FALSE, dns_rootname, mctx));
if (builtin_managed_keys != NULL)
CHECK(load_view_keys(builtin_managed_keys, vconfig,
view, ISC_TRUE, dns_rootname,
mctx));
}
CHECK(load_view_keys(view_keys, vconfig, view, ISC_FALSE,
NULL, mctx));
CHECK(load_view_keys(view_managed_keys, vconfig, view, ISC_TRUE,
NULL, mctx));
if (view->rdclass == dns_rdataclass_in) {
CHECK(load_view_keys(global_keys, vconfig, view, ISC_FALSE,
NULL, mctx));
CHECK(load_view_keys(global_managed_keys, vconfig, view,
ISC_TRUE, NULL, mctx));
}
/*
* Add key zone for managed-keys.
*/
obj = NULL;
(void)ns_config_get(maps, "managed-keys-directory", &obj);
directory = obj != NULL ? cfg_obj_asstring(obj) : NULL;
CHECK(add_keydata_zone(view, directory, ns_g_mctx));
cleanup:
return (result);
}
static isc_result_t
mustbesecure(const cfg_obj_t *mbs, dns_resolver_t *resolver) {
const cfg_listelt_t *element;
const cfg_obj_t *obj;
const char *str;
dns_fixedname_t fixed;
dns_name_t *name;
isc_boolean_t value;
isc_result_t result;
isc_buffer_t b;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
for (element = cfg_list_first(mbs);
element != NULL;
element = cfg_list_next(element))
{
obj = cfg_listelt_value(element);
str = cfg_obj_asstring(cfg_tuple_get(obj, "name"));
isc_buffer_init(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
value = cfg_obj_asboolean(cfg_tuple_get(obj, "value"));
CHECK(dns_resolver_setmustbesecure(resolver, name, value));
}
result = ISC_R_SUCCESS;
cleanup:
return (result);
}
/*%
* Get a dispatch appropriate for the resolver of a given view.
*/
static isc_result_t
get_view_querysource_dispatch(const cfg_obj_t **maps,
int af, dns_dispatch_t **dispatchp,
isc_boolean_t is_firstview)
{
isc_result_t result = ISC_R_FAILURE;
dns_dispatch_t *disp;
isc_sockaddr_t sa;
unsigned int attrs, attrmask;
const cfg_obj_t *obj = NULL;
unsigned int maxdispatchbuffers;
switch (af) {
case AF_INET:
result = ns_config_get(maps, "query-source", &obj);
INSIST(result == ISC_R_SUCCESS);
break;
case AF_INET6:
result = ns_config_get(maps, "query-source-v6", &obj);
INSIST(result == ISC_R_SUCCESS);
break;
default:
INSIST(0);
}
sa = *(cfg_obj_assockaddr(obj));
INSIST(isc_sockaddr_pf(&sa) == af);
/*
* If we don't support this address family, we're done!
*/
switch (af) {
case AF_INET:
result = isc_net_probeipv4();
break;
case AF_INET6:
result = isc_net_probeipv6();
break;
default:
INSIST(0);
}
if (result != ISC_R_SUCCESS)
return (ISC_R_SUCCESS);
/*
* Try to find a dispatcher that we can share.
*/
attrs = 0;
attrs |= DNS_DISPATCHATTR_UDP;
switch (af) {
case AF_INET:
attrs |= DNS_DISPATCHATTR_IPV4;
break;
case AF_INET6:
attrs |= DNS_DISPATCHATTR_IPV6;
break;
}
if (isc_sockaddr_getport(&sa) == 0) {
attrs |= DNS_DISPATCHATTR_EXCLUSIVE;
maxdispatchbuffers = 4096;
} else {
INSIST(obj != NULL);
if (is_firstview) {
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_INFO,
"using specific query-source port "
"suppresses port randomization and can be "
"insecure.");
}
maxdispatchbuffers = 1000;
}
attrmask = 0;
attrmask |= DNS_DISPATCHATTR_UDP;
attrmask |= DNS_DISPATCHATTR_TCP;
attrmask |= DNS_DISPATCHATTR_IPV4;
attrmask |= DNS_DISPATCHATTR_IPV6;
disp = NULL;
result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
ns_g_taskmgr, &sa, 4096,
maxdispatchbuffers, 32768, 16411, 16433,
attrs, attrmask, &disp);
if (result != ISC_R_SUCCESS) {
isc_sockaddr_t any;
char buf[ISC_SOCKADDR_FORMATSIZE];
switch (af) {
case AF_INET:
isc_sockaddr_any(&any);
break;
case AF_INET6:
isc_sockaddr_any6(&any);
break;
}
if (isc_sockaddr_equal(&sa, &any))
return (ISC_R_SUCCESS);
isc_sockaddr_format(&sa, buf, sizeof(buf));
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"could not get query source dispatcher (%s)",
buf);
return (result);
}
*dispatchp = disp;
return (ISC_R_SUCCESS);
}
static isc_result_t
configure_order(dns_order_t *order, const cfg_obj_t *ent) {
dns_rdataclass_t rdclass;
dns_rdatatype_t rdtype;
const cfg_obj_t *obj;
dns_fixedname_t fixed;
unsigned int mode = 0;
const char *str;
isc_buffer_t b;
isc_result_t result;
isc_boolean_t addroot;
result = ns_config_getclass(cfg_tuple_get(ent, "class"),
dns_rdataclass_any, &rdclass);
if (result != ISC_R_SUCCESS)
return (result);
result = ns_config_gettype(cfg_tuple_get(ent, "type"),
dns_rdatatype_any, &rdtype);
if (result != ISC_R_SUCCESS)
return (result);
obj = cfg_tuple_get(ent, "name");
if (cfg_obj_isstring(obj))
str = cfg_obj_asstring(obj);
else
str = "*";
addroot = ISC_TF(strcmp(str, "*") == 0);
isc_buffer_init(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
dns_fixedname_init(&fixed);
result = dns_name_fromtext(dns_fixedname_name(&fixed), &b,
dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS)
return (result);
obj = cfg_tuple_get(ent, "ordering");
INSIST(cfg_obj_isstring(obj));
str = cfg_obj_asstring(obj);
if (!strcasecmp(str, "fixed"))
mode = DNS_RDATASETATTR_FIXEDORDER;
else if (!strcasecmp(str, "random"))
mode = DNS_RDATASETATTR_RANDOMIZE;
else if (!strcasecmp(str, "cyclic"))
mode = 0;
else
INSIST(0);
/*
* "*" should match everything including the root (BIND 8 compat).
* As dns_name_matcheswildcard(".", "*.") returns FALSE add a
* explicit entry for "." when the name is "*".
*/
if (addroot) {
result = dns_order_add(order, dns_rootname,
rdtype, rdclass, mode);
if (result != ISC_R_SUCCESS)
return (result);
}
return (dns_order_add(order, dns_fixedname_name(&fixed),
rdtype, rdclass, mode));
}
static isc_result_t
configure_peer(const cfg_obj_t *cpeer, isc_mem_t *mctx, dns_peer_t **peerp) {
isc_netaddr_t na;
dns_peer_t *peer;
const cfg_obj_t *obj;
const char *str;
isc_result_t result;
unsigned int prefixlen;
cfg_obj_asnetprefix(cfg_map_getname(cpeer), &na, &prefixlen);
peer = NULL;
result = dns_peer_newprefix(mctx, &na, prefixlen, &peer);
if (result != ISC_R_SUCCESS)
return (result);
obj = NULL;
(void)cfg_map_get(cpeer, "bogus", &obj);
if (obj != NULL)
CHECK(dns_peer_setbogus(peer, cfg_obj_asboolean(obj)));
obj = NULL;
(void)cfg_map_get(cpeer, "provide-ixfr", &obj);
if (obj != NULL)
CHECK(dns_peer_setprovideixfr(peer, cfg_obj_asboolean(obj)));
obj = NULL;
(void)cfg_map_get(cpeer, "request-ixfr", &obj);
if (obj != NULL)
CHECK(dns_peer_setrequestixfr(peer, cfg_obj_asboolean(obj)));
obj = NULL;
(void)cfg_map_get(cpeer, "request-nsid", &obj);
if (obj != NULL)
CHECK(dns_peer_setrequestnsid(peer, cfg_obj_asboolean(obj)));
obj = NULL;
(void)cfg_map_get(cpeer, "edns", &obj);
if (obj != NULL)
CHECK(dns_peer_setsupportedns(peer, cfg_obj_asboolean(obj)));
obj = NULL;
(void)cfg_map_get(cpeer, "edns-udp-size", &obj);
if (obj != NULL) {
isc_uint32_t udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512)
udpsize = 512;
if (udpsize > 4096)
udpsize = 4096;
CHECK(dns_peer_setudpsize(peer, (isc_uint16_t)udpsize));
}
obj = NULL;
(void)cfg_map_get(cpeer, "max-udp-size", &obj);
if (obj != NULL) {
isc_uint32_t udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512)
udpsize = 512;
if (udpsize > 4096)
udpsize = 4096;
CHECK(dns_peer_setmaxudp(peer, (isc_uint16_t)udpsize));
}
obj = NULL;
(void)cfg_map_get(cpeer, "transfers", &obj);
if (obj != NULL)
CHECK(dns_peer_settransfers(peer, cfg_obj_asuint32(obj)));
obj = NULL;
(void)cfg_map_get(cpeer, "transfer-format", &obj);
if (obj != NULL) {
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "many-answers") == 0)
CHECK(dns_peer_settransferformat(peer,
dns_many_answers));
else if (strcasecmp(str, "one-answer") == 0)
CHECK(dns_peer_settransferformat(peer,
dns_one_answer));
else
INSIST(0);
}
obj = NULL;
(void)cfg_map_get(cpeer, "keys", &obj);
if (obj != NULL) {
result = dns_peer_setkeybycharp(peer, cfg_obj_asstring(obj));
if (result != ISC_R_SUCCESS)
goto cleanup;
}
obj = NULL;
if (na.family == AF_INET)
(void)cfg_map_get(cpeer, "transfer-source", &obj);
else
(void)cfg_map_get(cpeer, "transfer-source-v6", &obj);
if (obj != NULL) {
result = dns_peer_settransfersource(peer,
cfg_obj_assockaddr(obj));
if (result != ISC_R_SUCCESS)
goto cleanup;
ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
}
obj = NULL;
if (na.family == AF_INET)
(void)cfg_map_get(cpeer, "notify-source", &obj);
else
(void)cfg_map_get(cpeer, "notify-source-v6", &obj);
if (obj != NULL) {
result = dns_peer_setnotifysource(peer,
cfg_obj_assockaddr(obj));
if (result != ISC_R_SUCCESS)
goto cleanup;
ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
}
obj = NULL;
if (na.family == AF_INET)
(void)cfg_map_get(cpeer, "query-source", &obj);
else
(void)cfg_map_get(cpeer, "query-source-v6", &obj);
if (obj != NULL) {
result = dns_peer_setquerysource(peer,
cfg_obj_assockaddr(obj));
if (result != ISC_R_SUCCESS)
goto cleanup;
ns_add_reserved_dispatch(ns_g_server, cfg_obj_assockaddr(obj));
}
*peerp = peer;
return (ISC_R_SUCCESS);
cleanup:
dns_peer_detach(&peer);
return (result);
}
static isc_result_t
disable_algorithms(const cfg_obj_t *disabled, dns_resolver_t *resolver) {
isc_result_t result;
const cfg_obj_t *algorithms;
const cfg_listelt_t *element;
const char *str;
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t b;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
str = cfg_obj_asstring(cfg_tuple_get(disabled, "name"));
isc_buffer_init(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
algorithms = cfg_tuple_get(disabled, "algorithms");
for (element = cfg_list_first(algorithms);
element != NULL;
element = cfg_list_next(element))
{
isc_textregion_t r;
dns_secalg_t alg;
DE_CONST(cfg_obj_asstring(cfg_listelt_value(element)), r.base);
r.length = strlen(r.base);
result = dns_secalg_fromtext(&alg, &r);
if (result != ISC_R_SUCCESS) {
isc_uint8_t ui;
result = isc_parse_uint8(&ui, r.base, 10);
alg = ui;
}
if (result != ISC_R_SUCCESS) {
cfg_obj_log(cfg_listelt_value(element),
ns_g_lctx, ISC_LOG_ERROR,
"invalid algorithm");
CHECK(result);
}
CHECK(dns_resolver_disable_algorithm(resolver, name, alg));
}
cleanup:
return (result);
}
static isc_boolean_t
on_disable_list(const cfg_obj_t *disablelist, dns_name_t *zonename) {
const cfg_listelt_t *element;
dns_fixedname_t fixed;
dns_name_t *name;
isc_result_t result;
const cfg_obj_t *value;
const char *str;
isc_buffer_t b;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
for (element = cfg_list_first(disablelist);
element != NULL;
element = cfg_list_next(element))
{
value = cfg_listelt_value(element);
str = cfg_obj_asstring(value);
isc_buffer_init(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
result = dns_name_fromtext(name, &b, dns_rootname,
0, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (dns_name_equal(name, zonename))
return (ISC_TRUE);
}
return (ISC_FALSE);
}
static void
check_dbtype(dns_zone_t **zonep, unsigned int dbtypec, const char **dbargv,
isc_mem_t *mctx)
{
char **argv = NULL;
unsigned int i;
isc_result_t result;
result = dns_zone_getdbtype(*zonep, &argv, mctx);
if (result != ISC_R_SUCCESS) {
dns_zone_detach(zonep);
return;
}
/*
* Check that all the arguments match.
*/
for (i = 0; i < dbtypec; i++)
if (argv[i] == NULL || strcmp(argv[i], dbargv[i]) != 0) {
dns_zone_detach(zonep);
break;
}
/*
* Check that there are not extra arguments.
*/
if (i == dbtypec && argv[i] != NULL)
dns_zone_detach(zonep);
isc_mem_free(mctx, argv);
}
static isc_result_t
setquerystats(dns_zone_t *zone, isc_mem_t *mctx, isc_boolean_t on) {
isc_result_t result;
isc_stats_t *zoneqrystats;
zoneqrystats = NULL;
if (on) {
result = isc_stats_create(mctx, &zoneqrystats,
dns_nsstatscounter_max);
if (result != ISC_R_SUCCESS)
return (result);
}
dns_zone_setrequeststats(zone, zoneqrystats);
if (zoneqrystats != NULL)
isc_stats_detach(&zoneqrystats);
return (ISC_R_SUCCESS);
}
static ns_cache_t *
cachelist_find(ns_cachelist_t *cachelist, const char *cachename) {
ns_cache_t *nsc;
for (nsc = ISC_LIST_HEAD(*cachelist);
nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link)) {
if (strcmp(dns_cache_getname(nsc->cache), cachename) == 0)
return (nsc);
}
return (NULL);
}
static isc_boolean_t
cache_reusable(dns_view_t *originview, dns_view_t *view,
isc_boolean_t new_zero_no_soattl)
{
if (originview->checknames != view->checknames ||
dns_resolver_getzeronosoattl(originview->resolver) !=
new_zero_no_soattl ||
originview->acceptexpired != view->acceptexpired ||
originview->enablevalidation != view->enablevalidation ||
originview->maxcachettl != view->maxcachettl ||
originview->maxncachettl != view->maxncachettl) {
return (ISC_FALSE);
}
return (ISC_TRUE);
}
static isc_boolean_t
cache_sharable(dns_view_t *originview, dns_view_t *view,
isc_boolean_t new_zero_no_soattl,
unsigned int new_cleaning_interval,
isc_uint32_t new_max_cache_size)
{
/*
* If the cache cannot even reused for the same view, it cannot be
* shared with other views.
*/
if (!cache_reusable(originview, view, new_zero_no_soattl))
return (ISC_FALSE);
/*
* Check other cache related parameters that must be consistent among
* the sharing views.
*/
if (dns_cache_getcleaninginterval(originview->cache) !=
new_cleaning_interval ||
dns_cache_getcachesize(originview->cache) != new_max_cache_size) {
return (ISC_FALSE);
}
return (ISC_TRUE);
}
/*
* Callback from DLZ configure when the driver sets up a writeable zone
*/
static isc_result_t
dlzconfigure_callback(dns_view_t *view, dns_zone_t *zone) {
dns_name_t *origin = dns_zone_getorigin(zone);
dns_rdataclass_t zclass = view->rdclass;
isc_result_t result;
result = dns_zonemgr_managezone(ns_g_server->zonemgr, zone);
if (result != ISC_R_SUCCESS)
return result;
dns_zone_setstats(zone, ns_g_server->zonestats);
return ns_zone_configure_writeable_dlz(view->dlzdatabase,
zone, zclass, origin);
}
static isc_result_t
dns64_reverse(dns_view_t *view, isc_mem_t *mctx, isc_netaddr_t *na,
unsigned int prefixlen, const char *server,
const char *contact)
{
char *cp;
char reverse[48+sizeof("ip6.arpa.")];
const char *dns64_dbtype[4] = { "_builtin", "dns64", ".", "." };
const char *sep = ": view ";
const char *viewname = view->name;
const unsigned char *s6;
dns_fixedname_t fixed;
dns_name_t *name;
dns_zone_t *zone = NULL;
int dns64_dbtypec = 4;
isc_buffer_t b;
isc_result_t result;
REQUIRE(prefixlen == 32 || prefixlen == 40 || prefixlen == 48 ||
prefixlen == 56 || prefixlen == 64 || prefixlen == 96);
if (!strcmp(viewname, "_default")) {
sep = "";
viewname = "";
}
/*
* Construct the reverse name of the zone.
*/
cp = reverse;
s6 = na->type.in6.s6_addr;
while (prefixlen > 0) {
prefixlen -= 8;
sprintf(cp, "%x.%x.", s6[prefixlen/8] & 0xf,
(s6[prefixlen/8] >> 4) & 0xf);
cp += 4;
}
strcat(cp, "ip6.arpa.");
/*
* Create the actual zone.
*/
if (server != NULL)
dns64_dbtype[2] = server;
if (contact != NULL)
dns64_dbtype[3] = contact;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
isc_buffer_init(&b, reverse, strlen(reverse));
isc_buffer_add(&b, strlen(reverse));
CHECK(dns_name_fromtext(name, &b, dns_rootname, 0, NULL));
CHECK(dns_zone_create(&zone, mctx));
CHECK(dns_zone_setorigin(zone, name));
dns_zone_setview(zone, view);
CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
dns_zone_setclass(zone, view->rdclass);
dns_zone_settype(zone, dns_zone_master);
dns_zone_setstats(zone, ns_g_server->zonestats);
CHECK(dns_zone_setdbtype(zone, dns64_dbtypec, dns64_dbtype));
if (view->queryacl != NULL)
dns_zone_setqueryacl(zone, view->queryacl);
if (view->queryonacl != NULL)
dns_zone_setqueryonacl(zone, view->queryonacl);
dns_zone_setdialup(zone, dns_dialuptype_no);
dns_zone_setnotifytype(zone, dns_notifytype_no);
dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, ISC_TRUE);
CHECK(setquerystats(zone, mctx, ISC_FALSE)); /* XXXMPA */
CHECK(dns_view_addzone(view, zone));
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_INFO, "dns64 reverse zone%s%s: %s", sep,
viewname, reverse);
cleanup:
if (zone != NULL)
dns_zone_detach(&zone);
return (result);
}
static isc_result_t
configure_rpz(dns_view_t *view, const cfg_listelt_t *element) {
const cfg_obj_t *rpz_obj, *policy_obj;
const char *str;
dns_fixedname_t fixed;
dns_name_t *origin;
dns_rpz_zone_t *old, *new;
dns_zone_t *zone = NULL;
isc_result_t result;
unsigned int l1, l2;
new = isc_mem_get(view->mctx, sizeof(*new));
if (new == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
memset(new, 0, sizeof(*new));
dns_name_init(&new->nsdname, NULL);
dns_name_init(&new->origin, NULL);
dns_name_init(&new->cname, NULL);
ISC_LIST_INITANDAPPEND(view->rpz_zones, new, link);
rpz_obj = cfg_listelt_value(element);
policy_obj = cfg_tuple_get(rpz_obj, "policy");
if (cfg_obj_isvoid(policy_obj)) {
new->policy = DNS_RPZ_POLICY_GIVEN;
} else {
str = cfg_obj_asstring(policy_obj);
new->policy = dns_rpz_str2policy(str);
INSIST(new->policy != DNS_RPZ_POLICY_ERROR);
}
dns_fixedname_init(&fixed);
origin = dns_fixedname_name(&fixed);
str = cfg_obj_asstring(cfg_tuple_get(rpz_obj, "name"));
result = dns_name_fromstring(origin, str, DNS_NAME_DOWNCASE, NULL);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
"invalid zone '%s'", str);
goto cleanup;
}
result = dns_name_fromstring2(&new->nsdname, DNS_RPZ_NSDNAME_ZONE,
origin, DNS_NAME_DOWNCASE, view->mctx);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
"invalid zone '%s'", str);
goto cleanup;
}
/*
* The origin is part of 'nsdname' so we don't need to keep it
* seperately.
*/
l1 = dns_name_countlabels(&new->nsdname);
l2 = dns_name_countlabels(origin);
dns_name_getlabelsequence(&new->nsdname, l1 - l2, l2, &new->origin);
/*
* Are we configured to with the reponse policy zone?
*/
result = dns_view_findzone(view, &new->origin, &zone);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
"unknown zone '%s'", str);
goto cleanup;
}
if (dns_zone_gettype(zone) != dns_zone_master &&
dns_zone_gettype(zone) != dns_zone_slave) {
cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
"zone '%s' is neither master nor slave", str);
dns_zone_detach(&zone);
result = DNS_R_NOTMASTER;
goto cleanup;
}
dns_zone_detach(&zone);
for (old = ISC_LIST_HEAD(view->rpz_zones);
old != new;
old = ISC_LIST_NEXT(old, link)) {
++new->num;
if (dns_name_equal(&old->origin, &new->origin)) {
cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
"duplicate '%s'", str);
result = DNS_R_DUPLICATE;
goto cleanup;
}
}
if (new->policy == DNS_RPZ_POLICY_CNAME) {
str = cfg_obj_asstring(cfg_tuple_get(rpz_obj, "cname"));
result = dns_name_fromstring(&new->cname, str, 0, view->mctx);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(rpz_obj, ns_g_lctx, DNS_RPZ_ERROR_LEVEL,
"invalid cname '%s'", str);
goto cleanup;
}
}
return (ISC_R_SUCCESS);
cleanup:
dns_rpz_view_destroy(view);
return (result);
}
/*
* Configure 'view' according to 'vconfig', taking defaults from 'config'
* where values are missing in 'vconfig'.
*
* When configuring the default view, 'vconfig' will be NULL and the
* global defaults in 'config' used exclusively.
*/
static isc_result_t
configure_view(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
ns_cachelist_t *cachelist, const cfg_obj_t *bindkeys,
isc_mem_t *mctx, cfg_aclconfctx_t *actx,
isc_boolean_t need_hints)
{
const cfg_obj_t *maps[4];
const cfg_obj_t *cfgmaps[3];
const cfg_obj_t *optionmaps[3];
const cfg_obj_t *options = NULL;
const cfg_obj_t *voptions = NULL;
const cfg_obj_t *forwardtype;
const cfg_obj_t *forwarders;
const cfg_obj_t *alternates;
const cfg_obj_t *zonelist;
const cfg_obj_t *dlz;
unsigned int dlzargc;
char **dlzargv;
const cfg_obj_t *disabled;
const cfg_obj_t *obj;
const cfg_listelt_t *element;
in_port_t port;
dns_cache_t *cache = NULL;
isc_result_t result;
isc_uint32_t max_adb_size;
unsigned int cleaning_interval;
isc_uint32_t max_cache_size;
isc_uint32_t max_acache_size;
isc_uint32_t lame_ttl;
dns_tsig_keyring_t *ring = NULL;
dns_view_t *pview = NULL; /* Production view */
isc_mem_t *cmctx = NULL, *hmctx = NULL;
dns_dispatch_t *dispatch4 = NULL;
dns_dispatch_t *dispatch6 = NULL;
isc_boolean_t reused_cache = ISC_FALSE;
isc_boolean_t shared_cache = ISC_FALSE;
int i = 0, j = 0, k = 0;
const char *str;
const char *cachename = NULL;
dns_order_t *order = NULL;
isc_uint32_t udpsize;
unsigned int resopts = 0;
dns_zone_t *zone = NULL;
isc_uint32_t max_clients_per_query;
const char *sep = ": view ";
const char *viewname = view->name;
const char *forview = " for view ";
isc_boolean_t rfc1918;
isc_boolean_t empty_zones_enable;
const cfg_obj_t *disablelist = NULL;
isc_stats_t *resstats = NULL;
dns_stats_t *resquerystats = NULL;
isc_boolean_t auto_dlv = ISC_FALSE;
isc_boolean_t auto_root = ISC_FALSE;
ns_cache_t *nsc;
isc_boolean_t zero_no_soattl;
dns_acl_t *clients = NULL, *mapped = NULL, *excluded = NULL;
unsigned int query_timeout;
struct cfg_context *nzctx;
REQUIRE(DNS_VIEW_VALID(view));
if (config != NULL)
(void)cfg_map_get(config, "options", &options);
/*
* maps: view options, options, defaults
* cfgmaps: view options, config
* optionmaps: view options, options
*/
if (vconfig != NULL) {
voptions = cfg_tuple_get(vconfig, "options");
maps[i++] = voptions;
optionmaps[j++] = voptions;
cfgmaps[k++] = voptions;
}
if (options != NULL) {
maps[i++] = options;
optionmaps[j++] = options;
}
maps[i++] = ns_g_defaults;
maps[i] = NULL;
optionmaps[j] = NULL;
if (config != NULL)
cfgmaps[k++] = config;
cfgmaps[k] = NULL;
if (!strcmp(viewname, "_default")) {
sep = "";
viewname = "";
forview = "";
POST(forview);
}
/*
* Set the view's port number for outgoing queries.
*/
CHECKM(ns_config_getport(config, &port), "port");
dns_view_setdstport(view, port);
/*
* Create additional cache for this view and zones under the view
* if explicitly enabled.
* XXX950 default to on.
*/
obj = NULL;
(void)ns_config_get(maps, "acache-enable", &obj);
if (obj != NULL && cfg_obj_asboolean(obj)) {
cmctx = NULL;
CHECK(isc_mem_create(0, 0, &cmctx));
CHECK(dns_acache_create(&view->acache, cmctx, ns_g_taskmgr,
ns_g_timermgr));
isc_mem_setname(cmctx, "acache", NULL);
isc_mem_detach(&cmctx);
}
if (view->acache != NULL) {
obj = NULL;
result = ns_config_get(maps, "acache-cleaning-interval", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_acache_setcleaninginterval(view->acache,
cfg_obj_asuint32(obj) * 60);
obj = NULL;
result = ns_config_get(maps, "max-acache-size", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isstring(obj)) {
str = cfg_obj_asstring(obj);
INSIST(strcasecmp(str, "unlimited") == 0);
max_acache_size = ISC_UINT32_MAX;
} else {
isc_resourcevalue_t value;
value = cfg_obj_asuint64(obj);
if (value > ISC_UINT32_MAX) {
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
"'max-acache-size "
"%" ISC_PRINT_QUADFORMAT
"d' is too large",
value);
result = ISC_R_RANGE;
goto cleanup;
}
max_acache_size = (isc_uint32_t)value;
}
dns_acache_setcachesize(view->acache, max_acache_size);
}
CHECK(configure_view_acl(vconfig, config, "allow-query", NULL, actx,
ns_g_mctx, &view->queryacl));
if (view->queryacl == NULL) {
CHECK(configure_view_acl(NULL, ns_g_config, "allow-query",
NULL, actx, ns_g_mctx,
&view->queryacl));
}
/*
* Configure the zones.
*/
zonelist = NULL;
if (voptions != NULL)
(void)cfg_map_get(voptions, "zone", &zonelist);
else
(void)cfg_map_get(config, "zone", &zonelist);
/*
* Load zone configuration
*/
for (element = cfg_list_first(zonelist);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *zconfig = cfg_listelt_value(element);
CHECK(configure_zone(config, zconfig, vconfig, mctx, view,
actx, ISC_FALSE));
}
/*
* If we're allowing added zones, then load zone configuration
* from the newzone file for zones that were added during previous
* runs.
*/
nzctx = view->new_zone_config;
if (nzctx != NULL && nzctx->nzconfig != NULL) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"loading additional zones for view '%s'",
view->name);
zonelist = NULL;
cfg_map_get(nzctx->nzconfig, "zone", &zonelist);
for (element = cfg_list_first(zonelist);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *zconfig = cfg_listelt_value(element);
CHECK(configure_zone(config, zconfig, vconfig,
mctx, view, actx,
ISC_TRUE));
}
}
/*
* Create Dynamically Loadable Zone driver.
*/
dlz = NULL;
if (voptions != NULL)
(void)cfg_map_get(voptions, "dlz", &dlz);
else
(void)cfg_map_get(config, "dlz", &dlz);
obj = NULL;
if (dlz != NULL) {
(void)cfg_map_get(cfg_tuple_get(dlz, "options"),
"database", &obj);
if (obj != NULL) {
char *s = isc_mem_strdup(mctx, cfg_obj_asstring(obj));
if (s == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
result = dns_dlzstrtoargv(mctx, s, &dlzargc, &dlzargv);
if (result != ISC_R_SUCCESS) {
isc_mem_free(mctx, s);
goto cleanup;
}
obj = cfg_tuple_get(dlz, "name");
result = dns_dlzcreate(mctx, cfg_obj_asstring(obj),
dlzargv[0], dlzargc, dlzargv,
&view->dlzdatabase);
isc_mem_free(mctx, s);
isc_mem_put(mctx, dlzargv, dlzargc * sizeof(*dlzargv));
if (result != ISC_R_SUCCESS)
goto cleanup;
/*
* If the dlz backend supports configuration,
* then call its configure method now.
*/
result = dns_dlzconfigure(view, dlzconfigure_callback);
if (result != ISC_R_SUCCESS)
goto cleanup;
}
}
/*
* Obtain configuration parameters that affect the decision of whether
* we can reuse/share an existing cache.
*/
obj = NULL;
result = ns_config_get(maps, "cleaning-interval", &obj);
INSIST(result == ISC_R_SUCCESS);
cleaning_interval = cfg_obj_asuint32(obj) * 60;
obj = NULL;
result = ns_config_get(maps, "max-cache-size", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isstring(obj)) {
str = cfg_obj_asstring(obj);
INSIST(strcasecmp(str, "unlimited") == 0);
max_cache_size = ISC_UINT32_MAX;
} else {
isc_resourcevalue_t value;
value = cfg_obj_asuint64(obj);
if (value > ISC_UINT32_MAX) {
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
"'max-cache-size "
"%" ISC_PRINT_QUADFORMAT "d' is too large",
value);
result = ISC_R_RANGE;
goto cleanup;
}
max_cache_size = (isc_uint32_t)value;
}
/* Check-names. */
obj = NULL;
result = ns_checknames_get(maps, "response", &obj);
INSIST(result == ISC_R_SUCCESS);
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "fail") == 0) {
resopts |= DNS_RESOLVER_CHECKNAMES |
DNS_RESOLVER_CHECKNAMESFAIL;
view->checknames = ISC_TRUE;
} else if (strcasecmp(str, "warn") == 0) {
resopts |= DNS_RESOLVER_CHECKNAMES;
view->checknames = ISC_FALSE;
} else if (strcasecmp(str, "ignore") == 0) {
view->checknames = ISC_FALSE;
} else
INSIST(0);
obj = NULL;
result = ns_config_get(maps, "zero-no-soa-ttl-cache", &obj);
INSIST(result == ISC_R_SUCCESS);
zero_no_soattl = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "dns64", &obj);
if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") &&
strcmp(view->name, "_meta")) {
const cfg_listelt_t *element;
isc_netaddr_t na, suffix, *sp;
unsigned int prefixlen;
const char *server, *contact;
const cfg_obj_t *myobj;
myobj = NULL;
result = ns_config_get(maps, "dns64-server", &myobj);
if (result == ISC_R_SUCCESS)
server = cfg_obj_asstring(myobj);
else
server = NULL;
myobj = NULL;
result = ns_config_get(maps, "dns64-contact", &myobj);
if (result == ISC_R_SUCCESS)
contact = cfg_obj_asstring(myobj);
else
contact = NULL;
for (element = cfg_list_first(obj);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *map = cfg_listelt_value(element);
dns_dns64_t *dns64 = NULL;
unsigned int dns64options = 0;
cfg_obj_asnetprefix(cfg_map_getname(map), &na,
&prefixlen);
obj = NULL;
(void)cfg_map_get(map, "suffix", &obj);
if (obj != NULL) {
sp = &suffix;
isc_netaddr_fromsockaddr(sp,
cfg_obj_assockaddr(obj));
} else
sp = NULL;
clients = mapped = excluded = NULL;
obj = NULL;
(void)cfg_map_get(map, "clients", &obj);
if (obj != NULL) {
result = cfg_acl_fromconfig(obj, config,
ns_g_lctx, actx,
mctx, 0, &clients);
if (result != ISC_R_SUCCESS)
goto cleanup;
}
obj = NULL;
(void)cfg_map_get(map, "mapped", &obj);
if (obj != NULL) {
result = cfg_acl_fromconfig(obj, config,
ns_g_lctx, actx,
mctx, 0, &mapped);
if (result != ISC_R_SUCCESS)
goto cleanup;
}
obj = NULL;
(void)cfg_map_get(map, "exclude", &obj);
if (obj != NULL) {
result = cfg_acl_fromconfig(obj, config,
ns_g_lctx, actx,
mctx, 0, &excluded);
if (result != ISC_R_SUCCESS)
goto cleanup;
}
obj = NULL;
(void)cfg_map_get(map, "recursive-only", &obj);
if (obj != NULL && cfg_obj_asboolean(obj))
dns64options |= DNS_DNS64_RECURSIVE_ONLY;
obj = NULL;
(void)cfg_map_get(map, "break-dnssec", &obj);
if (obj != NULL && cfg_obj_asboolean(obj))
dns64options |= DNS_DNS64_BREAK_DNSSEC;
result = dns_dns64_create(mctx, &na, prefixlen, sp,
clients, mapped, excluded,
dns64options, &dns64);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_dns64_append(&view->dns64, dns64);
view->dns64cnt++;
result = dns64_reverse(view, mctx, &na, prefixlen,
server, contact);
if (result != ISC_R_SUCCESS)
goto cleanup;
if (clients != NULL)
dns_acl_detach(&clients);
if (mapped != NULL)
dns_acl_detach(&mapped);
if (excluded != NULL)
dns_acl_detach(&excluded);
}
}
obj = NULL;
result = ns_config_get(maps, "dnssec-accept-expired", &obj);
INSIST(result == ISC_R_SUCCESS);
view->acceptexpired = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "dnssec-validation", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isboolean(obj)) {
view->enablevalidation = cfg_obj_asboolean(obj);
} else {
/* If dnssec-validation is not boolean, it must be "auto" */
view->enablevalidation = ISC_TRUE;
auto_root = ISC_TRUE;
}
obj = NULL;
result = ns_config_get(maps, "max-cache-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
view->maxcachettl = cfg_obj_asuint32(obj);
obj = NULL;
result = ns_config_get(maps, "max-ncache-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
view->maxncachettl = cfg_obj_asuint32(obj);
if (view->maxncachettl > 7 * 24 * 3600)
view->maxncachettl = 7 * 24 * 3600;
/*
* Configure the view's cache.
*
* First, check to see if there are any attach-cache options. If yes,
* attempt to lookup an existing cache at attach it to the view. If
* there is not one, then try to reuse an existing cache if possible;
* otherwise create a new cache.
*
* Note that the ADB is not preserved or shared in either case.
*
* When a matching view is found, the associated statistics are also
* retrieved and reused.
*
* XXX Determining when it is safe to reuse or share a cache is tricky.
* When the view's configuration changes, the cached data may become
* invalid because it reflects our old view of the world. We check
* some of the configuration parameters that could invalidate the cache
* or otherwise make it unsharable, but there are other configuration
* options that should be checked. For example, if a view uses a
* forwarder, changes in the forwarder configuration may invalidate
* the cache. At the moment, it's the administrator's responsibility to
* ensure these configuration options don't invalidate reusing/sharing.
*/
obj = NULL;
result = ns_config_get(maps, "attach-cache", &obj);
if (result == ISC_R_SUCCESS)
cachename = cfg_obj_asstring(obj);
else
cachename = view->name;
cache = NULL;
nsc = cachelist_find(cachelist, cachename);
if (nsc != NULL) {
if (!cache_sharable(nsc->primaryview, view, zero_no_soattl,
cleaning_interval, max_cache_size)) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"views %s and %s can't share the cache "
"due to configuration parameter mismatch",
nsc->primaryview->name, view->name);
result = ISC_R_FAILURE;
goto cleanup;
}
dns_cache_attach(nsc->cache, &cache);
shared_cache = ISC_TRUE;
} else {
if (strcmp(cachename, view->name) == 0) {
result = dns_viewlist_find(&ns_g_server->viewlist,
cachename, view->rdclass,
&pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
goto cleanup;
if (pview != NULL) {
if (!cache_reusable(pview, view,
zero_no_soattl)) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_DEBUG(1),
"cache cannot be reused "
"for view %s due to "
"configuration parameter "
"mismatch", view->name);
} else {
INSIST(pview->cache != NULL);
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_DEBUG(3),
"reusing existing cache");
reused_cache = ISC_TRUE;
dns_cache_attach(pview->cache, &cache);
}
dns_view_getresstats(pview, &resstats);
dns_view_getresquerystats(pview,
&resquerystats);
dns_view_detach(&pview);
}
}
if (cache == NULL) {
/*
* Create a cache with the desired name. This normally
* equals the view name, but may also be a forward
* reference to a view that share the cache with this
* view but is not yet configured. If it is not the
* view name but not a forward reference either, then it
* is simply a named cache that is not shared.
*
* We use two separate memory contexts for the
* cache, for the main cache memory and the heap
* memory.
*/
CHECK(isc_mem_create(0, 0, &cmctx));
isc_mem_setname(cmctx, "cache", NULL);
CHECK(isc_mem_create(0, 0, &hmctx));
isc_mem_setname(hmctx, "cache_heap", NULL);
CHECK(dns_cache_create3(cmctx, hmctx, ns_g_taskmgr,
ns_g_timermgr, view->rdclass,
cachename, "rbt", 0, NULL,
&cache));
isc_mem_detach(&cmctx);
isc_mem_detach(&hmctx);
}
nsc = isc_mem_get(mctx, sizeof(*nsc));
if (nsc == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
nsc->cache = NULL;
dns_cache_attach(cache, &nsc->cache);
nsc->primaryview = view;
nsc->needflush = ISC_FALSE;
nsc->adbsizeadjusted = ISC_FALSE;
ISC_LINK_INIT(nsc, link);
ISC_LIST_APPEND(*cachelist, nsc, link);
}
dns_view_setcache2(view, cache, shared_cache);
/*
* cache-file cannot be inherited if views are present, but this
* should be caught by the configuration checking stage.
*/
obj = NULL;
result = ns_config_get(maps, "cache-file", &obj);
if (result == ISC_R_SUCCESS && strcmp(view->name, "_bind") != 0) {
CHECK(dns_cache_setfilename(cache, cfg_obj_asstring(obj)));
if (!reused_cache && !shared_cache)
CHECK(dns_cache_load(cache));
}
dns_cache_setcleaninginterval(cache, cleaning_interval);
dns_cache_setcachesize(cache, max_cache_size);
dns_cache_detach(&cache);
/*
* Resolver.
*
* XXXRTH Hardwired number of tasks.
*/
CHECK(get_view_querysource_dispatch(maps, AF_INET, &dispatch4,
ISC_TF(ISC_LIST_PREV(view, link)
== NULL)));
CHECK(get_view_querysource_dispatch(maps, AF_INET6, &dispatch6,
ISC_TF(ISC_LIST_PREV(view, link)
== NULL)));
if (dispatch4 == NULL && dispatch6 == NULL) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"unable to obtain neither an IPv4 nor"
" an IPv6 dispatch");
result = ISC_R_UNEXPECTED;
goto cleanup;
}
CHECK(dns_view_createresolver(view, ns_g_taskmgr, 31,
ns_g_socketmgr, ns_g_timermgr,
resopts, ns_g_dispatchmgr,
dispatch4, dispatch6));
if (resstats == NULL) {
CHECK(isc_stats_create(mctx, &resstats,
dns_resstatscounter_max));
}
dns_view_setresstats(view, resstats);
if (resquerystats == NULL)
CHECK(dns_rdatatypestats_create(mctx, &resquerystats));
dns_view_setresquerystats(view, resquerystats);
/*
* Set the ADB cache size to 1/8th of the max-cache-size or
* MAX_ADB_SIZE_FOR_CACHESHARE when the cache is shared.
*/
max_adb_size = 0;
if (max_cache_size != 0) {
max_adb_size = max_cache_size / 8;
if (max_adb_size == 0)
max_adb_size = 1; /* Force minimum. */
if (view != nsc->primaryview &&
max_adb_size > MAX_ADB_SIZE_FOR_CACHESHARE) {
max_adb_size = MAX_ADB_SIZE_FOR_CACHESHARE;
if (!nsc->adbsizeadjusted) {
dns_adb_setadbsize(nsc->primaryview->adb,
MAX_ADB_SIZE_FOR_CACHESHARE);
nsc->adbsizeadjusted = ISC_TRUE;
}
}
}
dns_adb_setadbsize(view->adb, max_adb_size);
/*
* Set resolver's lame-ttl.
*/
obj = NULL;
result = ns_config_get(maps, "lame-ttl", &obj);
INSIST(result == ISC_R_SUCCESS);
lame_ttl = cfg_obj_asuint32(obj);
if (lame_ttl > 1800)
lame_ttl = 1800;
dns_resolver_setlamettl(view->resolver, lame_ttl);
/*
* Set the resolver's query timeout.
*/
obj = NULL;
result = ns_config_get(maps, "resolver-query-timeout", &obj);
INSIST(result == ISC_R_SUCCESS);
query_timeout = cfg_obj_asuint32(obj);
dns_resolver_settimeout(view->resolver, query_timeout);
/* Specify whether to use 0-TTL for negative response for SOA query */
dns_resolver_setzeronosoattl(view->resolver, zero_no_soattl);
/*
* Set the resolver's EDNS UDP size.
*/
obj = NULL;
result = ns_config_get(maps, "edns-udp-size", &obj);
INSIST(result == ISC_R_SUCCESS);
udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512)
udpsize = 512;
if (udpsize > 4096)
udpsize = 4096;
dns_resolver_setudpsize(view->resolver, (isc_uint16_t)udpsize);
/*
* Set the maximum UDP response size.
*/
obj = NULL;
result = ns_config_get(maps, "max-udp-size", &obj);
INSIST(result == ISC_R_SUCCESS);
udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512)
udpsize = 512;
if (udpsize > 4096)
udpsize = 4096;
view->maxudp = udpsize;
/*
* Set supported DNSSEC algorithms.
*/
dns_resolver_reset_algorithms(view->resolver);
disabled = NULL;
(void)ns_config_get(maps, "disable-algorithms", &disabled);
if (disabled != NULL) {
for (element = cfg_list_first(disabled);
element != NULL;
element = cfg_list_next(element))
CHECK(disable_algorithms(cfg_listelt_value(element),
view->resolver));
}
/*
* A global or view "forwarders" option, if present,
* creates an entry for "." in the forwarding table.
*/
forwardtype = NULL;
forwarders = NULL;
(void)ns_config_get(maps, "forward", &forwardtype);
(void)ns_config_get(maps, "forwarders", &forwarders);
if (forwarders != NULL)
CHECK(configure_forward(config, view, dns_rootname,
forwarders, forwardtype));
/*
* Dual Stack Servers.
*/
alternates = NULL;
(void)ns_config_get(maps, "dual-stack-servers", &alternates);
if (alternates != NULL)
CHECK(configure_alternates(config, view, alternates));
/*
* We have default hints for class IN if we need them.
*/
if (view->rdclass == dns_rdataclass_in && view->hints == NULL)
dns_view_sethints(view, ns_g_server->in_roothints);
/*
* If we still have no hints, this is a non-IN view with no
* "hints zone" configured. Issue a warning, except if this
* is a root server. Root servers never need to consult
* their hints, so it's no point requiring users to configure
* them.
*/
if (view->hints == NULL) {
dns_zone_t *rootzone = NULL;
(void)dns_view_findzone(view, dns_rootname, &rootzone);
if (rootzone != NULL) {
dns_zone_detach(&rootzone);
need_hints = ISC_FALSE;
}
if (need_hints)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"no root hints for view '%s'",
view->name);
}
/*
* Configure the view's TSIG keys.
*/
CHECK(ns_tsigkeyring_fromconfig(config, vconfig, view->mctx, &ring));
if (ns_g_server->sessionkey != NULL) {
CHECK(dns_tsigkeyring_add(ring, ns_g_server->session_keyname,
ns_g_server->sessionkey));
}
dns_view_setkeyring(view, ring);
dns_tsigkeyring_detach(&ring);
/*
* See if we can re-use a dynamic key ring.
*/
result = dns_viewlist_find(&ns_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
goto cleanup;
if (pview != NULL) {
dns_view_getdynamickeyring(pview, &ring);
if (ring != NULL)
dns_view_setdynamickeyring(view, ring);
dns_tsigkeyring_detach(&ring);
dns_view_detach(&pview);
} else
dns_view_restorekeyring(view);
/*
* Configure the view's peer list.
*/
{
const cfg_obj_t *peers = NULL;
const cfg_listelt_t *element;
dns_peerlist_t *newpeers = NULL;
(void)ns_config_get(cfgmaps, "server", &peers);
CHECK(dns_peerlist_new(mctx, &newpeers));
for (element = cfg_list_first(peers);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *cpeer = cfg_listelt_value(element);
dns_peer_t *peer;
CHECK(configure_peer(cpeer, mctx, &peer));
dns_peerlist_addpeer(newpeers, peer);
dns_peer_detach(&peer);
}
dns_peerlist_detach(&view->peers);
view->peers = newpeers; /* Transfer ownership. */
}
/*
* Configure the views rrset-order.
*/
{
const cfg_obj_t *rrsetorder = NULL;
const cfg_listelt_t *element;
(void)ns_config_get(maps, "rrset-order", &rrsetorder);
CHECK(dns_order_create(mctx, &order));
for (element = cfg_list_first(rrsetorder);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *ent = cfg_listelt_value(element);
CHECK(configure_order(order, ent));
}
if (view->order != NULL)
dns_order_detach(&view->order);
dns_order_attach(order, &view->order);
dns_order_detach(&order);
}
/*
* Copy the aclenv object.
*/
dns_aclenv_copy(&view->aclenv, &ns_g_server->aclenv);
/*
* Configure the "match-clients" and "match-destinations" ACL.
*/
CHECK(configure_view_acl(vconfig, config, "match-clients", NULL, actx,
ns_g_mctx, &view->matchclients));
CHECK(configure_view_acl(vconfig, config, "match-destinations", NULL,
actx, ns_g_mctx, &view->matchdestinations));
/*
* Configure the "match-recursive-only" option.
*/
obj = NULL;
(void)ns_config_get(maps, "match-recursive-only", &obj);
if (obj != NULL && cfg_obj_asboolean(obj))
view->matchrecursiveonly = ISC_TRUE;
else
view->matchrecursiveonly = ISC_FALSE;
/*
* Configure other configurable data.
*/
obj = NULL;
result = ns_config_get(maps, "recursion", &obj);
INSIST(result == ISC_R_SUCCESS);
view->recursion = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "auth-nxdomain", &obj);
INSIST(result == ISC_R_SUCCESS);
view->auth_nxdomain = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "minimal-responses", &obj);
INSIST(result == ISC_R_SUCCESS);
view->minimalresponses = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "transfer-format", &obj);
INSIST(result == ISC_R_SUCCESS);
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "many-answers") == 0)
view->transfer_format = dns_many_answers;
else if (strcasecmp(str, "one-answer") == 0)
view->transfer_format = dns_one_answer;
else
INSIST(0);
/*
* Set sources where additional data and CNAME/DNAME
* targets for authoritative answers may be found.
*/
obj = NULL;
result = ns_config_get(maps, "additional-from-auth", &obj);
INSIST(result == ISC_R_SUCCESS);
view->additionalfromauth = cfg_obj_asboolean(obj);
if (view->recursion && ! view->additionalfromauth) {
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
"'additional-from-auth no' is only supported "
"with 'recursion no'");
view->additionalfromauth = ISC_TRUE;
}
obj = NULL;
result = ns_config_get(maps, "additional-from-cache", &obj);
INSIST(result == ISC_R_SUCCESS);
view->additionalfromcache = cfg_obj_asboolean(obj);
if (view->recursion && ! view->additionalfromcache) {
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
"'additional-from-cache no' is only supported "
"with 'recursion no'");
view->additionalfromcache = ISC_TRUE;
}
/*
* Set "allow-query-cache", "allow-query-cache-on",
* "allow-recursion", and "allow-recursion-on" acls if
* configured in named.conf.
*/
CHECK(configure_view_acl(vconfig, config, "allow-query-cache", NULL,
actx, ns_g_mctx, &view->cacheacl));
CHECK(configure_view_acl(vconfig, config, "allow-query-cache-on", NULL,
actx, ns_g_mctx, &view->cacheonacl));
if (view->cacheonacl == NULL)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-query-cache-on", NULL, actx,
ns_g_mctx, &view->cacheonacl));
if (strcmp(view->name, "_bind") != 0) {
CHECK(configure_view_acl(vconfig, config, "allow-recursion",
NULL, actx, ns_g_mctx,
&view->recursionacl));
CHECK(configure_view_acl(vconfig, config, "allow-recursion-on",
NULL, actx, ns_g_mctx,
&view->recursiononacl));
}
/*
* "allow-query-cache" inherits from "allow-recursion" if set,
* otherwise from "allow-query" if set.
* "allow-recursion" inherits from "allow-query-cache" if set,
* otherwise from "allow-query" if set.
*/
if (view->cacheacl == NULL && view->recursionacl != NULL)
dns_acl_attach(view->recursionacl, &view->cacheacl);
/*
* XXXEACH: This call to configure_view_acl() is redundant. We
* are leaving it as it is because we are making a minimal change
* for a patch release. In the future this should be changed to
* dns_acl_attach(view->queryacl, &view->cacheacl).
*/
if (view->cacheacl == NULL && view->recursion)
CHECK(configure_view_acl(vconfig, config, "allow-query", NULL,
actx, ns_g_mctx, &view->cacheacl));
if (view->recursion &&
view->recursionacl == NULL && view->cacheacl != NULL)
dns_acl_attach(view->cacheacl, &view->recursionacl);
/*
* Set default "allow-recursion", "allow-recursion-on" and
* "allow-query-cache" acls.
*/
if (view->recursionacl == NULL && view->recursion)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-recursion", NULL,
actx, ns_g_mctx,
&view->recursionacl));
if (view->recursiononacl == NULL && view->recursion)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-recursion-on", NULL,
actx, ns_g_mctx,
&view->recursiononacl));
if (view->cacheacl == NULL) {
if (view->recursion)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-query-cache", NULL,
actx, ns_g_mctx,
&view->cacheacl));
else
CHECK(dns_acl_none(mctx, &view->cacheacl));
}
/*
* Filter setting on addresses in the answer section.
*/
CHECK(configure_view_acl(vconfig, config, "deny-answer-addresses",
"acl", actx, ns_g_mctx, &view->denyansweracl));
CHECK(configure_view_nametable(vconfig, config, "deny-answer-addresses",
"except-from", ns_g_mctx,
&view->answeracl_exclude));
/*
* Filter setting on names (CNAME/DNAME targets) in the answer section.
*/
CHECK(configure_view_nametable(vconfig, config, "deny-answer-aliases",
"name", ns_g_mctx,
&view->denyanswernames));
CHECK(configure_view_nametable(vconfig, config, "deny-answer-aliases",
"except-from", ns_g_mctx,
&view->answernames_exclude));
/*
* Configure sortlist, if set
*/
CHECK(configure_view_sortlist(vconfig, config, actx, ns_g_mctx,
&view->sortlist));
/*
* Configure default allow-transfer, allow-notify, allow-update
* and allow-update-forwarding ACLs, if set, so they can be
* inherited by zones.
*/
if (view->notifyacl == NULL)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-notify", NULL, actx,
ns_g_mctx, &view->notifyacl));
if (view->transferacl == NULL)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-transfer", NULL, actx,
ns_g_mctx, &view->transferacl));
if (view->updateacl == NULL)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-update", NULL, actx,
ns_g_mctx, &view->updateacl));
if (view->upfwdacl == NULL)
CHECK(configure_view_acl(NULL, ns_g_config,
"allow-update-forwarding", NULL, actx,
ns_g_mctx, &view->upfwdacl));
obj = NULL;
result = ns_config_get(maps, "request-ixfr", &obj);
INSIST(result == ISC_R_SUCCESS);
view->requestixfr = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "provide-ixfr", &obj);
INSIST(result == ISC_R_SUCCESS);
view->provideixfr = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "request-nsid", &obj);
INSIST(result == ISC_R_SUCCESS);
view->requestnsid = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(maps, "max-clients-per-query", &obj);
INSIST(result == ISC_R_SUCCESS);
max_clients_per_query = cfg_obj_asuint32(obj);
obj = NULL;
result = ns_config_get(maps, "clients-per-query", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_resolver_setclientsperquery(view->resolver,
cfg_obj_asuint32(obj),
max_clients_per_query);
#ifdef ALLOW_FILTER_AAAA_ON_V4
obj = NULL;
result = ns_config_get(maps, "filter-aaaa-on-v4", &obj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_isboolean(obj)) {
if (cfg_obj_asboolean(obj))
view->v4_aaaa = dns_v4_aaaa_filter;
else
view->v4_aaaa = dns_v4_aaaa_ok;
} else {
const char *v4_aaaastr = cfg_obj_asstring(obj);
if (strcasecmp(v4_aaaastr, "break-dnssec") == 0)
view->v4_aaaa = dns_v4_aaaa_break_dnssec;
else
INSIST(0);
}
CHECK(configure_view_acl(vconfig, config, "filter-aaaa", NULL,
actx, ns_g_mctx, &view->v4_aaaa_acl));
#endif
obj = NULL;
result = ns_config_get(maps, "dnssec-enable", &obj);
INSIST(result == ISC_R_SUCCESS);
view->enablednssec = cfg_obj_asboolean(obj);
obj = NULL;
result = ns_config_get(optionmaps, "dnssec-lookaside", &obj);
if (result == ISC_R_SUCCESS) {
/* If set to "auto", use the version from the defaults */
const cfg_obj_t *dlvobj;
dlvobj = cfg_listelt_value(cfg_list_first(obj));
if (!strcmp(cfg_obj_asstring(cfg_tuple_get(dlvobj, "domain")),
"auto") &&
cfg_obj_isvoid(cfg_tuple_get(dlvobj, "trust-anchor"))) {
auto_dlv = ISC_TRUE;
obj = NULL;
result = cfg_map_get(ns_g_defaults,
"dnssec-lookaside", &obj);
}
}
if (result == ISC_R_SUCCESS) {
for (element = cfg_list_first(obj);
element != NULL;
element = cfg_list_next(element))
{
const char *str;
isc_buffer_t b;
dns_name_t *dlv;
obj = cfg_listelt_value(element);
str = cfg_obj_asstring(cfg_tuple_get(obj,
"trust-anchor"));
isc_buffer_init(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
dlv = dns_fixedname_name(&view->dlv_fixed);
CHECK(dns_name_fromtext(dlv, &b, dns_rootname,
DNS_NAME_DOWNCASE, NULL));
view->dlv = dns_fixedname_name(&view->dlv_fixed);
}
} else
view->dlv = NULL;
/*
* For now, there is only one kind of trusted keys, the
* "security roots".
*/
CHECK(configure_view_dnsseckeys(view, vconfig, config, bindkeys,
auto_dlv, auto_root, mctx));
dns_resolver_resetmustbesecure(view->resolver);
obj = NULL;
result = ns_config_get(maps, "dnssec-must-be-secure", &obj);
if (result == ISC_R_SUCCESS)
CHECK(mustbesecure(obj, view->resolver));
obj = NULL;
result = ns_config_get(maps, "preferred-glue", &obj);
if (result == ISC_R_SUCCESS) {
str = cfg_obj_asstring(obj);
if (strcasecmp(str, "a") == 0)
view->preferred_glue = dns_rdatatype_a;
else if (strcasecmp(str, "aaaa") == 0)
view->preferred_glue = dns_rdatatype_aaaa;
else
view->preferred_glue = 0;
} else
view->preferred_glue = 0;
obj = NULL;
result = ns_config_get(maps, "root-delegation-only", &obj);
if (result == ISC_R_SUCCESS) {
dns_view_setrootdelonly(view, ISC_TRUE);
if (!cfg_obj_isvoid(obj)) {
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t b;
const char *str;
const cfg_obj_t *exclude;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
for (element = cfg_list_first(obj);
element != NULL;
element = cfg_list_next(element)) {
exclude = cfg_listelt_value(element);
str = cfg_obj_asstring(exclude);
isc_buffer_init(&b, str, strlen(str));
isc_buffer_add(&b, strlen(str));
CHECK(dns_name_fromtext(name, &b, dns_rootname,
0, NULL));
CHECK(dns_view_excludedelegationonly(view,
name));
}
}
} else
dns_view_setrootdelonly(view, ISC_FALSE);
/*
* Setup automatic empty zones. If recursion is off then
* they are disabled by default.
*/
obj = NULL;
(void)ns_config_get(maps, "empty-zones-enable", &obj);
(void)ns_config_get(maps, "disable-empty-zone", &disablelist);
if (obj == NULL && disablelist == NULL &&
view->rdclass == dns_rdataclass_in) {
rfc1918 = ISC_FALSE;
empty_zones_enable = view->recursion;
} else if (view->rdclass == dns_rdataclass_in) {
rfc1918 = ISC_TRUE;
if (obj != NULL)
empty_zones_enable = cfg_obj_asboolean(obj);
else
empty_zones_enable = view->recursion;
} else {
rfc1918 = ISC_FALSE;
empty_zones_enable = ISC_FALSE;
}
if (empty_zones_enable) {
const char *empty;
int empty_zone = 0;
dns_fixedname_t fixed;
dns_name_t *name;
isc_buffer_t buffer;
const char *str;
char server[DNS_NAME_FORMATSIZE + 1];
char contact[DNS_NAME_FORMATSIZE + 1];
isc_boolean_t logit;
const char *empty_dbtype[4] =
{ "_builtin", "empty", NULL, NULL };
int empty_dbtypec = 4;
isc_boolean_t zonestats_on;
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
obj = NULL;
result = ns_config_get(maps, "empty-server", &obj);
if (result == ISC_R_SUCCESS) {
str = cfg_obj_asstring(obj);
isc_buffer_init(&buffer, str, strlen(str));
isc_buffer_add(&buffer, strlen(str));
CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
NULL));
isc_buffer_init(&buffer, server, sizeof(server) - 1);
CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
server[isc_buffer_usedlength(&buffer)] = 0;
empty_dbtype[2] = server;
} else
empty_dbtype[2] = "@";
obj = NULL;
result = ns_config_get(maps, "empty-contact", &obj);
if (result == ISC_R_SUCCESS) {
str = cfg_obj_asstring(obj);
isc_buffer_init(&buffer, str, strlen(str));
isc_buffer_add(&buffer, strlen(str));
CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
NULL));
isc_buffer_init(&buffer, contact, sizeof(contact) - 1);
CHECK(dns_name_totext(name, ISC_FALSE, &buffer));
contact[isc_buffer_usedlength(&buffer)] = 0;
empty_dbtype[3] = contact;
} else
empty_dbtype[3] = ".";
obj = NULL;
result = ns_config_get(maps, "zone-statistics", &obj);
INSIST(result == ISC_R_SUCCESS);
zonestats_on = cfg_obj_asboolean(obj);
logit = ISC_TRUE;
for (empty = empty_zones[empty_zone].zone;
empty != NULL;
empty = empty_zones[++empty_zone].zone)
{
dns_forwarders_t *forwarders = NULL;
dns_view_t *pview = NULL;
isc_buffer_init(&buffer, empty, strlen(empty));
isc_buffer_add(&buffer, strlen(empty));
/*
* Look for zone on drop list.
*/
CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
NULL));
if (disablelist != NULL &&
on_disable_list(disablelist, name))
continue;
/*
* This zone already exists.
*/
(void)dns_view_findzone(view, name, &zone);
if (zone != NULL) {
CHECK(setquerystats(zone, mctx, zonestats_on));
dns_zone_detach(&zone);
continue;
}
/*
* If we would forward this name don't add a
* empty zone for it.
*/
result = dns_fwdtable_find(view->fwdtable, name,
&forwarders);
if (result == ISC_R_SUCCESS &&
forwarders->fwdpolicy == dns_fwdpolicy_only)
continue;
if (!rfc1918 && empty_zones[empty_zone].rfc1918) {
if (logit) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_WARNING,
"Warning%s%s: "
"'empty-zones-enable/"
"disable-empty-zone' "
"not set: disabling "
"RFC 1918 empty zones",
sep, viewname);
logit = ISC_FALSE;
}
continue;
}
/*
* See if we can re-use a existing zone.
*/
result = dns_viewlist_find(&ns_g_server->viewlist,
view->name, view->rdclass,
&pview);
if (result != ISC_R_NOTFOUND &&
result != ISC_R_SUCCESS)
goto cleanup;
if (pview != NULL) {
(void)dns_view_findzone(pview, name, &zone);
dns_view_detach(&pview);
if (zone != NULL)
check_dbtype(&zone, empty_dbtypec,
empty_dbtype, mctx);
if (zone != NULL) {
dns_zone_setview(zone, view);
CHECK(dns_view_addzone(view, zone));
CHECK(setquerystats(zone, mctx,
zonestats_on));
dns_zone_detach(&zone);
continue;
}
}
CHECK(dns_zone_create(&zone, mctx));
CHECK(dns_zone_setorigin(zone, name));
dns_zone_setview(zone, view);
CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
dns_zone_setclass(zone, view->rdclass);
dns_zone_settype(zone, dns_zone_master);
dns_zone_setstats(zone, ns_g_server->zonestats);
CHECK(dns_zone_setdbtype(zone, empty_dbtypec,
empty_dbtype));
if (view->queryacl != NULL)
dns_zone_setqueryacl(zone, view->queryacl);
if (view->queryonacl != NULL)
dns_zone_setqueryonacl(zone, view->queryonacl);
dns_zone_setdialup(zone, dns_dialuptype_no);
dns_zone_setnotifytype(zone, dns_notifytype_no);
dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS,
ISC_TRUE);
CHECK(setquerystats(zone, mctx, zonestats_on));
CHECK(dns_view_addzone(view, zone));
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"automatic empty zone%s%s: %s",
sep, viewname, empty);
dns_zone_detach(&zone);
}
}
/*
* Make the list of response policy zone names for views that
* are used for real lookups and so care about hints.
*/
zonelist = NULL;
if (view->rdclass == dns_rdataclass_in && need_hints) {
obj = NULL;
result = ns_config_get(maps, "response-policy", &obj);
if (result == ISC_R_SUCCESS)
cfg_map_get(obj, "zone", &zonelist);
}
if (zonelist != NULL) {
for (element = cfg_list_first(zonelist);
element != NULL;
element = cfg_list_next(element)) {
result = configure_rpz(view, element);
if (result != ISC_R_SUCCESS)
goto cleanup;
dns_rpz_set_need(ISC_TRUE);
}
}
result = ISC_R_SUCCESS;
cleanup:
if (clients != NULL)
dns_acl_detach(&clients);
if (mapped != NULL)
dns_acl_detach(&mapped);
if (excluded != NULL)
dns_acl_detach(&excluded);
if (ring != NULL)
dns_tsigkeyring_detach(&ring);
if (zone != NULL)
dns_zone_detach(&zone);
if (dispatch4 != NULL)
dns_dispatch_detach(&dispatch4);
if (dispatch6 != NULL)
dns_dispatch_detach(&dispatch6);
if (resstats != NULL)
isc_stats_detach(&resstats);
if (resquerystats != NULL)
dns_stats_detach(&resquerystats);
if (order != NULL)
dns_order_detach(&order);
if (cmctx != NULL)
isc_mem_detach(&cmctx);
if (hmctx != NULL)
isc_mem_detach(&hmctx);
if (cache != NULL)
dns_cache_detach(&cache);
return (result);
}
static isc_result_t
configure_hints(dns_view_t *view, const char *filename) {
isc_result_t result;
dns_db_t *db;
db = NULL;
result = dns_rootns_create(view->mctx, view->rdclass, filename, &db);
if (result == ISC_R_SUCCESS) {
dns_view_sethints(view, db);
dns_db_detach(&db);
}
return (result);
}
static isc_result_t
configure_alternates(const cfg_obj_t *config, dns_view_t *view,
const cfg_obj_t *alternates)
{
const cfg_obj_t *portobj;
const cfg_obj_t *addresses;
const cfg_listelt_t *element;
isc_result_t result = ISC_R_SUCCESS;
in_port_t port;
/*
* Determine which port to send requests to.
*/
if (ns_g_lwresdonly && ns_g_port != 0)
port = ns_g_port;
else
CHECKM(ns_config_getport(config, &port), "port");
if (alternates != NULL) {
portobj = cfg_tuple_get(alternates, "port");
if (cfg_obj_isuint32(portobj)) {
isc_uint32_t val = cfg_obj_asuint32(portobj);
if (val > ISC_UINT16_MAX) {
cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
"port '%u' out of range", val);
return (ISC_R_RANGE);
}
port = (in_port_t) val;
}
}
addresses = NULL;
if (alternates != NULL)
addresses = cfg_tuple_get(alternates, "addresses");
for (element = cfg_list_first(addresses);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *alternate = cfg_listelt_value(element);
isc_sockaddr_t sa;
if (!cfg_obj_issockaddr(alternate)) {
dns_fixedname_t fixed;
dns_name_t *name;
const char *str = cfg_obj_asstring(cfg_tuple_get(
alternate, "name"));
isc_buffer_t buffer;
in_port_t myport = port;
isc_buffer_init(&buffer, str, strlen(str));
isc_buffer_add(&buffer, strlen(str));
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
CHECK(dns_name_fromtext(name, &buffer, dns_rootname, 0,
NULL));
portobj = cfg_tuple_get(alternate, "port");
if (cfg_obj_isuint32(portobj)) {
isc_uint32_t val = cfg_obj_asuint32(portobj);
if (val > ISC_UINT16_MAX) {
cfg_obj_log(portobj, ns_g_lctx,
ISC_LOG_ERROR,
"port '%u' out of range",
val);
return (ISC_R_RANGE);
}
myport = (in_port_t) val;
}
CHECK(dns_resolver_addalternate(view->resolver, NULL,
name, myport));
continue;
}
sa = *cfg_obj_assockaddr(alternate);
if (isc_sockaddr_getport(&sa) == 0)
isc_sockaddr_setport(&sa, port);
CHECK(dns_resolver_addalternate(view->resolver, &sa,
NULL, 0));
}
cleanup:
return (result);
}
static isc_result_t
configure_forward(const cfg_obj_t *config, dns_view_t *view, dns_name_t *origin,
const cfg_obj_t *forwarders, const cfg_obj_t *forwardtype)
{
const cfg_obj_t *portobj;
const cfg_obj_t *faddresses;
const cfg_listelt_t *element;
dns_fwdpolicy_t fwdpolicy = dns_fwdpolicy_none;
isc_sockaddrlist_t addresses;
isc_sockaddr_t *sa;
isc_result_t result;
in_port_t port;
ISC_LIST_INIT(addresses);
/*
* Determine which port to send forwarded requests to.
*/
if (ns_g_lwresdonly && ns_g_port != 0)
port = ns_g_port;
else
CHECKM(ns_config_getport(config, &port), "port");
if (forwarders != NULL) {
portobj = cfg_tuple_get(forwarders, "port");
if (cfg_obj_isuint32(portobj)) {
isc_uint32_t val = cfg_obj_asuint32(portobj);
if (val > ISC_UINT16_MAX) {
cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
"port '%u' out of range", val);
return (ISC_R_RANGE);
}
port = (in_port_t) val;
}
}
faddresses = NULL;
if (forwarders != NULL)
faddresses = cfg_tuple_get(forwarders, "addresses");
for (element = cfg_list_first(faddresses);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *forwarder = cfg_listelt_value(element);
sa = isc_mem_get(view->mctx, sizeof(isc_sockaddr_t));
if (sa == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
*sa = *cfg_obj_assockaddr(forwarder);
if (isc_sockaddr_getport(sa) == 0)
isc_sockaddr_setport(sa, port);
ISC_LINK_INIT(sa, link);
ISC_LIST_APPEND(addresses, sa, link);
}
if (ISC_LIST_EMPTY(addresses)) {
if (forwardtype != NULL)
cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
"no forwarders seen; disabling "
"forwarding");
fwdpolicy = dns_fwdpolicy_none;
} else {
if (forwardtype == NULL)
fwdpolicy = dns_fwdpolicy_first;
else {
const char *forwardstr = cfg_obj_asstring(forwardtype);
if (strcasecmp(forwardstr, "first") == 0)
fwdpolicy = dns_fwdpolicy_first;
else if (strcasecmp(forwardstr, "only") == 0)
fwdpolicy = dns_fwdpolicy_only;
else
INSIST(0);
}
}
result = dns_fwdtable_add(view->fwdtable, origin, &addresses,
fwdpolicy);
if (result != ISC_R_SUCCESS) {
char namebuf[DNS_NAME_FORMATSIZE];
dns_name_format(origin, namebuf, sizeof(namebuf));
cfg_obj_log(forwarders, ns_g_lctx, ISC_LOG_WARNING,
"could not set up forwarding for domain '%s': %s",
namebuf, isc_result_totext(result));
goto cleanup;
}
result = ISC_R_SUCCESS;
cleanup:
while (!ISC_LIST_EMPTY(addresses)) {
sa = ISC_LIST_HEAD(addresses);
ISC_LIST_UNLINK(addresses, sa, link);
isc_mem_put(view->mctx, sa, sizeof(isc_sockaddr_t));
}
return (result);
}
static isc_result_t
get_viewinfo(const cfg_obj_t *vconfig, const char **namep,
dns_rdataclass_t *classp)
{
isc_result_t result = ISC_R_SUCCESS;
const char *viewname;
dns_rdataclass_t viewclass;
REQUIRE(namep != NULL && *namep == NULL);
REQUIRE(classp != NULL);
if (vconfig != NULL) {
const cfg_obj_t *classobj = NULL;
viewname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
classobj = cfg_tuple_get(vconfig, "class");
result = ns_config_getclass(classobj, dns_rdataclass_in,
&viewclass);
} else {
viewname = "_default";
viewclass = dns_rdataclass_in;
}
*namep = viewname;
*classp = viewclass;
return (result);
}
/*
* Find a view based on its configuration info and attach to it.
*
* If 'vconfig' is NULL, attach to the default view.
*/
static isc_result_t
find_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
dns_view_t **viewp)
{
isc_result_t result;
const char *viewname = NULL;
dns_rdataclass_t viewclass;
dns_view_t *view = NULL;
result = get_viewinfo(vconfig, &viewname, &viewclass);
if (result != ISC_R_SUCCESS)
return (result);
result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
if (result != ISC_R_SUCCESS)
return (result);
*viewp = view;
return (ISC_R_SUCCESS);
}
/*
* Create a new view and add it to the list.
*
* If 'vconfig' is NULL, create the default view.
*
* The view created is attached to '*viewp'.
*/
static isc_result_t
create_view(const cfg_obj_t *vconfig, dns_viewlist_t *viewlist,
dns_view_t **viewp)
{
isc_result_t result;
const char *viewname = NULL;
dns_rdataclass_t viewclass;
dns_view_t *view = NULL;
result = get_viewinfo(vconfig, &viewname, &viewclass);
if (result != ISC_R_SUCCESS)
return (result);
result = dns_viewlist_find(viewlist, viewname, viewclass, &view);
if (result == ISC_R_SUCCESS)
return (ISC_R_EXISTS);
if (result != ISC_R_NOTFOUND)
return (result);
INSIST(view == NULL);
result = dns_view_create(ns_g_mctx, viewclass, viewname, &view);
if (result != ISC_R_SUCCESS)
return (result);
ISC_LIST_APPEND(*viewlist, view, link);
dns_view_attach(view, viewp);
return (ISC_R_SUCCESS);
}
/*
* Configure or reconfigure a zone.
*/
static isc_result_t
configure_zone(const cfg_obj_t *config, const cfg_obj_t *zconfig,
const cfg_obj_t *vconfig, isc_mem_t *mctx, dns_view_t *view,
cfg_aclconfctx_t *aclconf, isc_boolean_t added)
{
dns_view_t *pview = NULL; /* Production view */
dns_zone_t *zone = NULL; /* New or reused zone */
dns_zone_t *dupzone = NULL;
const cfg_obj_t *options = NULL;
const cfg_obj_t *zoptions = NULL;
const cfg_obj_t *typeobj = NULL;
const cfg_obj_t *forwarders = NULL;
const cfg_obj_t *forwardtype = NULL;
const cfg_obj_t *only = NULL;
isc_result_t result;
isc_result_t tresult;
isc_buffer_t buffer;
dns_fixedname_t fixorigin;
dns_name_t *origin;
const char *zname;
dns_rdataclass_t zclass;
const char *ztypestr;
options = NULL;
(void)cfg_map_get(config, "options", &options);
zoptions = cfg_tuple_get(zconfig, "options");
/*
* Get the zone origin as a dns_name_t.
*/
zname = cfg_obj_asstring(cfg_tuple_get(zconfig, "name"));
isc_buffer_init(&buffer, zname, strlen(zname));
isc_buffer_add(&buffer, strlen(zname));
dns_fixedname_init(&fixorigin);
CHECK(dns_name_fromtext(dns_fixedname_name(&fixorigin),
&buffer, dns_rootname, 0, NULL));
origin = dns_fixedname_name(&fixorigin);
CHECK(ns_config_getclass(cfg_tuple_get(zconfig, "class"),
view->rdclass, &zclass));
if (zclass != view->rdclass) {
const char *vname = NULL;
if (vconfig != NULL)
vname = cfg_obj_asstring(cfg_tuple_get(vconfig,
"name"));
else
vname = "<default view>";
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"zone '%s': wrong class for view '%s'",
zname, vname);
result = ISC_R_FAILURE;
goto cleanup;
}
(void)cfg_map_get(zoptions, "type", &typeobj);
if (typeobj == NULL) {
cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
"zone '%s' 'type' not specified", zname);
return (ISC_R_FAILURE);
}
ztypestr = cfg_obj_asstring(typeobj);
/*
* "hints zones" aren't zones. If we've got one,
* configure it and return.
*/
if (strcasecmp(ztypestr, "hint") == 0) {
const cfg_obj_t *fileobj = NULL;
if (cfg_map_get(zoptions, "file", &fileobj) != ISC_R_SUCCESS) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"zone '%s': 'file' not specified",
zname);
result = ISC_R_FAILURE;
goto cleanup;
}
if (dns_name_equal(origin, dns_rootname)) {
const char *hintsfile = cfg_obj_asstring(fileobj);
result = configure_hints(view, hintsfile);
if (result != ISC_R_SUCCESS) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_ERROR,
"could not configure root hints "
"from '%s': %s", hintsfile,
isc_result_totext(result));
goto cleanup;
}
/*
* Hint zones may also refer to delegation only points.
*/
only = NULL;
tresult = cfg_map_get(zoptions, "delegation-only",
&only);
if (tresult == ISC_R_SUCCESS && cfg_obj_asboolean(only))
CHECK(dns_view_adddelegationonly(view, origin));
} else {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"ignoring non-root hint zone '%s'",
zname);
result = ISC_R_SUCCESS;
}
/* Skip ordinary zone processing. */
goto cleanup;
}
/*
* "forward zones" aren't zones either. Translate this syntax into
* the appropriate selective forwarding configuration and return.
*/
if (strcasecmp(ztypestr, "forward") == 0) {
forwardtype = NULL;
forwarders = NULL;
(void)cfg_map_get(zoptions, "forward", &forwardtype);
(void)cfg_map_get(zoptions, "forwarders", &forwarders);
result = configure_forward(config, view, origin, forwarders,
forwardtype);
goto cleanup;
}
/*
* "delegation-only zones" aren't zones either.
*/
if (strcasecmp(ztypestr, "delegation-only") == 0) {
result = dns_view_adddelegationonly(view, origin);
goto cleanup;
}
/*
* Check for duplicates in the new zone table.
*/
result = dns_view_findzone(view, origin, &dupzone);
if (result == ISC_R_SUCCESS) {
/*
* We already have this zone!
*/
cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
"zone '%s' already exists", zname);
dns_zone_detach(&dupzone);
result = ISC_R_EXISTS;
goto cleanup;
}
INSIST(dupzone == NULL);
/*
* See if we can reuse an existing zone. This is
* only possible if all of these are true:
* - The zone's view exists
* - A zone with the right name exists in the view
* - The zone is compatible with the config
* options (e.g., an existing master zone cannot
* be reused if the options specify a slave zone)
*/
result = dns_viewlist_find(&ns_g_server->viewlist,
view->name, view->rdclass,
&pview);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
goto cleanup;
if (pview != NULL)
result = dns_view_findzone(pview, origin, &zone);
if (result != ISC_R_NOTFOUND && result != ISC_R_SUCCESS)
goto cleanup;
if (zone != NULL && !ns_zone_reusable(zone, zconfig))
dns_zone_detach(&zone);
if (zone != NULL) {
/*
* We found a reusable zone. Make it use the
* new view.
*/
dns_zone_setview(zone, view);
if (view->acache != NULL)
dns_zone_setacache(zone, view->acache);
} else {
/*
* We cannot reuse an existing zone, we have
* to create a new one.
*/
CHECK(dns_zone_create(&zone, mctx));
CHECK(dns_zone_setorigin(zone, origin));
dns_zone_setview(zone, view);
if (view->acache != NULL)
dns_zone_setacache(zone, view->acache);
CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
dns_zone_setstats(zone, ns_g_server->zonestats);
}
/*
* If the zone contains a 'forwarders' statement, configure
* selective forwarding.
*/
forwarders = NULL;
if (cfg_map_get(zoptions, "forwarders", &forwarders) == ISC_R_SUCCESS)
{
forwardtype = NULL;
(void)cfg_map_get(zoptions, "forward", &forwardtype);
CHECK(configure_forward(config, view, origin, forwarders,
forwardtype));
}
/*
* Stub and forward zones may also refer to delegation only points.
*/
only = NULL;
if (cfg_map_get(zoptions, "delegation-only", &only) == ISC_R_SUCCESS)
{
if (cfg_obj_asboolean(only))
CHECK(dns_view_adddelegationonly(view, origin));
}
/*
* Mark whether the zone was originally added at runtime or not
*/
dns_zone_setadded(zone, added);
/*
* Configure the zone.
*/
CHECK(ns_zone_configure(config, vconfig, zconfig, aclconf, zone));
/*
* Add the zone to its view in the new view list.
*/
CHECK(dns_view_addzone(view, zone));
cleanup:
if (zone != NULL)
dns_zone_detach(&zone);
if (pview != NULL)
dns_view_detach(&pview);
return (result);
}
/*
* Configure built-in zone for storing managed-key data.
*/
#define KEYZONE "managed-keys.bind"
#define MKEYS ".mkeys"
static isc_result_t
add_keydata_zone(dns_view_t *view, const char *directory, isc_mem_t *mctx) {
isc_result_t result;
dns_view_t *pview = NULL;
dns_zone_t *zone = NULL;
dns_acl_t *none = NULL;
char filename[PATH_MAX];
char buffer[ISC_SHA256_DIGESTSTRINGLENGTH + sizeof(MKEYS)];
int n;
REQUIRE(view != NULL);
/* See if we can re-use an existing keydata zone. */
result = dns_viewlist_find(&ns_g_server->viewlist,
view->name, view->rdclass,
&pview);
if (result != ISC_R_NOTFOUND &&
result != ISC_R_SUCCESS)
return (result);
if (pview != NULL && pview->managed_keys != NULL) {
dns_zone_attach(pview->managed_keys, &view->managed_keys);
dns_zone_setview(pview->managed_keys, view);
dns_view_detach(&pview);
return (ISC_R_SUCCESS);
}
/* No existing keydata zone was found; create one */
CHECK(dns_zone_create(&zone, mctx));
CHECK(dns_zone_setorigin(zone, dns_rootname));
isc_sha256_data((void *)view->name, strlen(view->name), buffer);
strcat(buffer, MKEYS);
n = snprintf(filename, sizeof(filename), "%s%s%s",
directory ? directory : "", directory ? "/" : "",
strcmp(view->name, "_default") == 0 ? KEYZONE : buffer);
if (n < 0 || (size_t)n >= sizeof(filename)) {
result = (n < 0) ? ISC_R_FAILURE : ISC_R_NOSPACE;
goto cleanup;
}
CHECK(dns_zone_setfile(zone, filename));
dns_zone_setview(zone, view);
dns_zone_settype(zone, dns_zone_key);
dns_zone_setclass(zone, view->rdclass);
CHECK(dns_zonemgr_managezone(ns_g_server->zonemgr, zone));
if (view->acache != NULL)
dns_zone_setacache(zone, view->acache);
CHECK(dns_acl_none(mctx, &none));
dns_zone_setqueryacl(zone, none);
dns_zone_setqueryonacl(zone, none);
dns_acl_detach(&none);
dns_zone_setdialup(zone, dns_dialuptype_no);
dns_zone_setnotifytype(zone, dns_notifytype_no);
dns_zone_setoption(zone, DNS_ZONEOPT_NOCHECKNS, ISC_TRUE);
dns_zone_setjournalsize(zone, 0);
dns_zone_setstats(zone, ns_g_server->zonestats);
CHECK(setquerystats(zone, mctx, ISC_FALSE));
if (view->managed_keys != NULL)
dns_zone_detach(&view->managed_keys);
dns_zone_attach(zone, &view->managed_keys);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"set up managed keys zone for view %s, file '%s'",
view->name, filename);
cleanup:
if (zone != NULL)
dns_zone_detach(&zone);
if (none != NULL)
dns_acl_detach(&none);
return (result);
}
/*
* Configure a single server quota.
*/
static void
configure_server_quota(const cfg_obj_t **maps, const char *name,
isc_quota_t *quota)
{
const cfg_obj_t *obj = NULL;
isc_result_t result;
result = ns_config_get(maps, name, &obj);
INSIST(result == ISC_R_SUCCESS);
isc_quota_max(quota, cfg_obj_asuint32(obj));
}
/*
* This function is called as soon as the 'directory' statement has been
* parsed. This can be extended to support other options if necessary.
*/
static isc_result_t
directory_callback(const char *clausename, const cfg_obj_t *obj, void *arg) {
isc_result_t result;
const char *directory;
REQUIRE(strcasecmp("directory", clausename) == 0);
UNUSED(arg);
UNUSED(clausename);
/*
* Change directory.
*/
directory = cfg_obj_asstring(obj);
if (! isc_file_ischdiridempotent(directory))
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_WARNING,
"option 'directory' contains relative path '%s'",
directory);
result = isc_dir_chdir(directory);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR,
"change directory to '%s' failed: %s",
directory, isc_result_totext(result));
return (result);
}
return (ISC_R_SUCCESS);
}
static void
scan_interfaces(ns_server_t *server, isc_boolean_t verbose) {
isc_boolean_t match_mapped = server->aclenv.match_mapped;
ns_interfacemgr_scan(server->interfacemgr, verbose);
/*
* Update the "localhost" and "localnets" ACLs to match the
* current set of network interfaces.
*/
dns_aclenv_copy(&server->aclenv,
ns_interfacemgr_getaclenv(server->interfacemgr));
server->aclenv.match_mapped = match_mapped;
}
static isc_result_t
add_listenelt(isc_mem_t *mctx, ns_listenlist_t *list, isc_sockaddr_t *addr,
isc_boolean_t wcardport_ok)
{
ns_listenelt_t *lelt = NULL;
dns_acl_t *src_acl = NULL;
isc_result_t result;
isc_sockaddr_t any_sa6;
isc_netaddr_t netaddr;
REQUIRE(isc_sockaddr_pf(addr) == AF_INET6);
isc_sockaddr_any6(&any_sa6);
if (!isc_sockaddr_equal(&any_sa6, addr) &&
(wcardport_ok || isc_sockaddr_getport(addr) != 0)) {
isc_netaddr_fromin6(&netaddr, &addr->type.sin6.sin6_addr);
result = dns_acl_create(mctx, 0, &src_acl);
if (result != ISC_R_SUCCESS)
return (result);
result = dns_iptable_addprefix(src_acl->iptable,
&netaddr, 128, ISC_TRUE);
if (result != ISC_R_SUCCESS)
goto clean;
result = ns_listenelt_create(mctx, isc_sockaddr_getport(addr),
src_acl, &lelt);
if (result != ISC_R_SUCCESS)
goto clean;
ISC_LIST_APPEND(list->elts, lelt, link);
}
return (ISC_R_SUCCESS);
clean:
INSIST(lelt == NULL);
dns_acl_detach(&src_acl);
return (result);
}
/*
* Make a list of xxx-source addresses and call ns_interfacemgr_adjust()
* to update the listening interfaces accordingly.
* We currently only consider IPv6, because this only affects IPv6 wildcard
* sockets.
*/
static void
adjust_interfaces(ns_server_t *server, isc_mem_t *mctx) {
isc_result_t result;
ns_listenlist_t *list = NULL;
dns_view_t *view;
dns_zone_t *zone, *next;
isc_sockaddr_t addr, *addrp;
result = ns_listenlist_create(mctx, &list);
if (result != ISC_R_SUCCESS)
return;
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link)) {
dns_dispatch_t *dispatch6;
dispatch6 = dns_resolver_dispatchv6(view->resolver);
if (dispatch6 == NULL)
continue;
result = dns_dispatch_getlocaladdress(dispatch6, &addr);
if (result != ISC_R_SUCCESS)
goto fail;
/*
* We always add non-wildcard address regardless of whether
* the port is 'any' (the fourth arg is TRUE): if the port is
* specific, we need to add it since it may conflict with a
* listening interface; if it's zero, we'll dynamically open
* query ports, and some of them may override an existing
* wildcard IPv6 port.
*/
result = add_listenelt(mctx, list, &addr, ISC_TRUE);
if (result != ISC_R_SUCCESS)
goto fail;
}
zone = NULL;
for (result = dns_zone_first(server->zonemgr, &zone);
result == ISC_R_SUCCESS;
next = NULL, result = dns_zone_next(zone, &next), zone = next) {
dns_view_t *zoneview;
/*
* At this point the zone list may contain a stale zone
* just removed from the configuration. To see the validity,
* check if the corresponding view is in our current view list.
* There may also be old zones that are still in the process
* of shutting down and have detached from their old view
* (zoneview == NULL).
*/
zoneview = dns_zone_getview(zone);
if (zoneview == NULL)
continue;
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL && view != zoneview;
view = ISC_LIST_NEXT(view, link))
;
if (view == NULL)
continue;
addrp = dns_zone_getnotifysrc6(zone);
result = add_listenelt(mctx, list, addrp, ISC_FALSE);
if (result != ISC_R_SUCCESS)
goto fail;
addrp = dns_zone_getxfrsource6(zone);
result = add_listenelt(mctx, list, addrp, ISC_FALSE);
if (result != ISC_R_SUCCESS)
goto fail;
}
ns_interfacemgr_adjust(server->interfacemgr, list, ISC_TRUE);
clean:
ns_listenlist_detach(&list);
return;
fail:
/*
* Even when we failed the procedure, most of other interfaces
* should work correctly. We therefore just warn it.
*/
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"could not adjust the listen-on list; "
"some interfaces may not work");
goto clean;
}
/*
* This event callback is invoked to do periodic network
* interface scanning.
*/
static void
interface_timer_tick(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
ns_server_t *server = (ns_server_t *) event->ev_arg;
INSIST(task == server->task);
UNUSED(task);
isc_event_free(&event);
/*
* XXX should scan interfaces unlocked and get exclusive access
* only to replace ACLs.
*/
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
scan_interfaces(server, ISC_FALSE);
isc_task_endexclusive(server->task);
}
static void
heartbeat_timer_tick(isc_task_t *task, isc_event_t *event) {
ns_server_t *server = (ns_server_t *) event->ev_arg;
dns_view_t *view;
UNUSED(task);
isc_event_free(&event);
view = ISC_LIST_HEAD(server->viewlist);
while (view != NULL) {
dns_view_dialup(view);
view = ISC_LIST_NEXT(view, link);
}
}
static void
pps_timer_tick(isc_task_t *task, isc_event_t *event) {
static unsigned int oldrequests = 0;
unsigned int requests = ns_client_requests;
UNUSED(task);
isc_event_free(&event);
/*
* Don't worry about wrapping as the overflow result will be right.
*/
dns_pps = (requests - oldrequests) / 1200;
oldrequests = requests;
}
/*
* Replace the current value of '*field', a dynamically allocated
* string or NULL, with a dynamically allocated copy of the
* null-terminated string pointed to by 'value', or NULL.
*/
static isc_result_t
setstring(ns_server_t *server, char **field, const char *value) {
char *copy;
if (value != NULL) {
copy = isc_mem_strdup(server->mctx, value);
if (copy == NULL)
return (ISC_R_NOMEMORY);
} else {
copy = NULL;
}
if (*field != NULL)
isc_mem_free(server->mctx, *field);
*field = copy;
return (ISC_R_SUCCESS);
}
/*
* Replace the current value of '*field', a dynamically allocated
* string or NULL, with another dynamically allocated string
* or NULL if whether 'obj' is a string or void value, respectively.
*/
static isc_result_t
setoptstring(ns_server_t *server, char **field, const cfg_obj_t *obj) {
if (cfg_obj_isvoid(obj))
return (setstring(server, field, NULL));
else
return (setstring(server, field, cfg_obj_asstring(obj)));
}
static void
set_limit(const cfg_obj_t **maps, const char *configname,
const char *description, isc_resource_t resourceid,
isc_resourcevalue_t defaultvalue)
{
const cfg_obj_t *obj = NULL;
const char *resource;
isc_resourcevalue_t value;
isc_result_t result;
if (ns_config_get(maps, configname, &obj) != ISC_R_SUCCESS)
return;
if (cfg_obj_isstring(obj)) {
resource = cfg_obj_asstring(obj);
if (strcasecmp(resource, "unlimited") == 0)
value = ISC_RESOURCE_UNLIMITED;
else {
INSIST(strcasecmp(resource, "default") == 0);
value = defaultvalue;
}
} else
value = cfg_obj_asuint64(obj);
result = isc_resource_setlimit(resourceid, value);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
result == ISC_R_SUCCESS ?
ISC_LOG_DEBUG(3) : ISC_LOG_WARNING,
"set maximum %s to %" ISC_PRINT_QUADFORMAT "u: %s",
description, value, isc_result_totext(result));
}
#define SETLIMIT(cfgvar, resource, description) \
set_limit(maps, cfgvar, description, isc_resource_ ## resource, \
ns_g_init ## resource)
static void
set_limits(const cfg_obj_t **maps) {
SETLIMIT("stacksize", stacksize, "stack size");
SETLIMIT("datasize", datasize, "data size");
SETLIMIT("coresize", coresize, "core size");
SETLIMIT("files", openfiles, "open files");
}
static void
portset_fromconf(isc_portset_t *portset, const cfg_obj_t *ports,
isc_boolean_t positive)
{
const cfg_listelt_t *element;
for (element = cfg_list_first(ports);
element != NULL;
element = cfg_list_next(element)) {
const cfg_obj_t *obj = cfg_listelt_value(element);
if (cfg_obj_isuint32(obj)) {
in_port_t port = (in_port_t)cfg_obj_asuint32(obj);
if (positive)
isc_portset_add(portset, port);
else
isc_portset_remove(portset, port);
} else {
const cfg_obj_t *obj_loport, *obj_hiport;
in_port_t loport, hiport;
obj_loport = cfg_tuple_get(obj, "loport");
loport = (in_port_t)cfg_obj_asuint32(obj_loport);
obj_hiport = cfg_tuple_get(obj, "hiport");
hiport = (in_port_t)cfg_obj_asuint32(obj_hiport);
if (positive)
isc_portset_addrange(portset, loport, hiport);
else {
isc_portset_removerange(portset, loport,
hiport);
}
}
}
}
static isc_result_t
removed(dns_zone_t *zone, void *uap) {
const char *type;
if (dns_zone_getview(zone) != uap)
return (ISC_R_SUCCESS);
switch (dns_zone_gettype(zone)) {
case dns_zone_master:
type = "master";
break;
case dns_zone_slave:
type = "slave";
break;
case dns_zone_stub:
type = "stub";
break;
default:
type = "other";
break;
}
dns_zone_log(zone, ISC_LOG_INFO, "(%s) removed", type);
return (ISC_R_SUCCESS);
}
static void
cleanup_session_key(ns_server_t *server, isc_mem_t *mctx) {
if (server->session_keyfile != NULL) {
isc_file_remove(server->session_keyfile);
isc_mem_free(mctx, server->session_keyfile);
server->session_keyfile = NULL;
}
if (server->session_keyname != NULL) {
if (dns_name_dynamic(server->session_keyname))
dns_name_free(server->session_keyname, mctx);
isc_mem_put(mctx, server->session_keyname, sizeof(dns_name_t));
server->session_keyname = NULL;
}
if (server->sessionkey != NULL)
dns_tsigkey_detach(&server->sessionkey);
server->session_keyalg = DST_ALG_UNKNOWN;
server->session_keybits = 0;
}
static isc_result_t
generate_session_key(const char *filename, const char *keynamestr,
dns_name_t *keyname, const char *algstr,
dns_name_t *algname, unsigned int algtype,
isc_uint16_t bits, isc_mem_t *mctx,
dns_tsigkey_t **tsigkeyp)
{
isc_result_t result = ISC_R_SUCCESS;
dst_key_t *key = NULL;
isc_buffer_t key_txtbuffer;
isc_buffer_t key_rawbuffer;
char key_txtsecret[256];
char key_rawsecret[64];
isc_region_t key_rawregion;
isc_stdtime_t now;
dns_tsigkey_t *tsigkey = NULL;
FILE *fp = NULL;
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"generating session key for dynamic DNS");
/* generate key */
result = dst_key_generate(keyname, algtype, bits, 1, 0,
DNS_KEYPROTO_ANY, dns_rdataclass_in,
mctx, &key);
if (result != ISC_R_SUCCESS)
return (result);
/*
* Dump the key to the buffer for later use. Should be done before
* we transfer the ownership of key to tsigkey.
*/
isc_buffer_init(&key_rawbuffer, &key_rawsecret, sizeof(key_rawsecret));
CHECK(dst_key_tobuffer(key, &key_rawbuffer));
isc_buffer_usedregion(&key_rawbuffer, &key_rawregion);
isc_buffer_init(&key_txtbuffer, &key_txtsecret, sizeof(key_txtsecret));
CHECK(isc_base64_totext(&key_rawregion, -1, "", &key_txtbuffer));
/* Store the key in tsigkey. */
isc_stdtime_get(&now);
CHECK(dns_tsigkey_createfromkey(dst_key_name(key), algname, key,
ISC_FALSE, NULL, now, now, mctx, NULL,
&tsigkey));
/* Dump the key to the key file. */
fp = ns_os_openfile(filename, S_IRUSR|S_IWUSR, ISC_TRUE);
if (fp == NULL) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"could not create %s", filename);
result = ISC_R_NOPERM;
goto cleanup;
}
fprintf(fp, "key \"%s\" {\n"
"\talgorithm %s;\n"
"\tsecret \"%.*s\";\n};\n", keynamestr, algstr,
(int) isc_buffer_usedlength(&key_txtbuffer),
(char*) isc_buffer_base(&key_txtbuffer));
RUNTIME_CHECK(isc_stdio_flush(fp) == ISC_R_SUCCESS);
RUNTIME_CHECK(isc_stdio_close(fp) == ISC_R_SUCCESS);
dst_key_free(&key);
*tsigkeyp = tsigkey;
return (ISC_R_SUCCESS);
cleanup:
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"failed to generate session key "
"for dynamic DNS: %s", isc_result_totext(result));
if (tsigkey != NULL)
dns_tsigkey_detach(&tsigkey);
if (key != NULL)
dst_key_free(&key);
return (result);
}
static isc_result_t
configure_session_key(const cfg_obj_t **maps, ns_server_t *server,
isc_mem_t *mctx)
{
const char *keyfile, *keynamestr, *algstr;
unsigned int algtype;
dns_fixedname_t fname;
dns_name_t *keyname, *algname;
isc_buffer_t buffer;
isc_uint16_t bits;
const cfg_obj_t *obj;
isc_boolean_t need_deleteold = ISC_FALSE;
isc_boolean_t need_createnew = ISC_FALSE;
isc_result_t result;
obj = NULL;
result = ns_config_get(maps, "session-keyfile", &obj);
if (result == ISC_R_SUCCESS) {
if (cfg_obj_isvoid(obj))
keyfile = NULL; /* disable it */
else
keyfile = cfg_obj_asstring(obj);
} else
keyfile = ns_g_defaultsessionkeyfile;
obj = NULL;
result = ns_config_get(maps, "session-keyname", &obj);
INSIST(result == ISC_R_SUCCESS);
keynamestr = cfg_obj_asstring(obj);
dns_fixedname_init(&fname);
isc_buffer_init(&buffer, keynamestr, strlen(keynamestr));
isc_buffer_add(&buffer, strlen(keynamestr));
keyname = dns_fixedname_name(&fname);
result = dns_name_fromtext(keyname, &buffer, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS)
return (result);
obj = NULL;
result = ns_config_get(maps, "session-keyalg", &obj);
INSIST(result == ISC_R_SUCCESS);
algstr = cfg_obj_asstring(obj);
algname = NULL;
result = ns_config_getkeyalgorithm2(algstr, &algname, &algtype, &bits);
if (result != ISC_R_SUCCESS) {
const char *s = " (keeping current key)";
cfg_obj_log(obj, ns_g_lctx, ISC_LOG_ERROR, "session-keyalg: "
"unsupported or unknown algorithm '%s'%s",
algstr,
server->session_keyfile != NULL ? s : "");
return (result);
}
/* See if we need to (re)generate a new key. */
if (keyfile == NULL) {
if (server->session_keyfile != NULL)
need_deleteold = ISC_TRUE;
} else if (server->session_keyfile == NULL)
need_createnew = ISC_TRUE;
else if (strcmp(keyfile, server->session_keyfile) != 0 ||
!dns_name_equal(server->session_keyname, keyname) ||
server->session_keyalg != algtype ||
server->session_keybits != bits) {
need_deleteold = ISC_TRUE;
need_createnew = ISC_TRUE;
}
if (need_deleteold) {
INSIST(server->session_keyfile != NULL);
INSIST(server->session_keyname != NULL);
INSIST(server->sessionkey != NULL);
cleanup_session_key(server, mctx);
}
if (need_createnew) {
INSIST(server->sessionkey == NULL);
INSIST(server->session_keyfile == NULL);
INSIST(server->session_keyname == NULL);
INSIST(server->session_keyalg == DST_ALG_UNKNOWN);
INSIST(server->session_keybits == 0);
server->session_keyname = isc_mem_get(mctx, sizeof(dns_name_t));
if (server->session_keyname == NULL)
goto cleanup;
dns_name_init(server->session_keyname, NULL);
CHECK(dns_name_dup(keyname, mctx, server->session_keyname));
server->session_keyfile = isc_mem_strdup(mctx, keyfile);
if (server->session_keyfile == NULL)
goto cleanup;
server->session_keyalg = algtype;
server->session_keybits = bits;
CHECK(generate_session_key(keyfile, keynamestr, keyname, algstr,
algname, algtype, bits, mctx,
&server->sessionkey));
}
return (result);
cleanup:
cleanup_session_key(server, mctx);
return (result);
}
static isc_result_t
setup_newzones(dns_view_t *view, cfg_obj_t *config, cfg_obj_t *vconfig,
cfg_parser_t *parser, cfg_aclconfctx_t *actx)
{
isc_result_t result = ISC_R_SUCCESS;
isc_boolean_t allow = ISC_FALSE;
struct cfg_context *nzcfg = NULL;
cfg_parser_t *nzparser = NULL;
cfg_obj_t *nzconfig = NULL;
const cfg_obj_t *maps[4];
const cfg_obj_t *options = NULL, *voptions = NULL;
const cfg_obj_t *nz = NULL;
int i = 0;
REQUIRE (config != NULL);
if (vconfig != NULL)
voptions = cfg_tuple_get(vconfig, "options");
if (voptions != NULL)
maps[i++] = voptions;
result = cfg_map_get(config, "options", &options);
if (result == ISC_R_SUCCESS)
maps[i++] = options;
maps[i++] = ns_g_defaults;
maps[i] = NULL;
result = ns_config_get(maps, "allow-new-zones", &nz);
if (result == ISC_R_SUCCESS)
allow = cfg_obj_asboolean(nz);
if (!allow) {
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
return (ISC_R_SUCCESS);
}
nzcfg = isc_mem_get(view->mctx, sizeof(*nzcfg));
if (nzcfg == NULL) {
dns_view_setnewzones(view, ISC_FALSE, NULL, NULL);
return (ISC_R_NOMEMORY);
}
dns_view_setnewzones(view, allow, nzcfg, newzone_cfgctx_destroy);
memset(nzcfg, 0, sizeof(*nzcfg));
isc_mem_attach(view->mctx, &nzcfg->mctx);
cfg_obj_attach(config, &nzcfg->config);
cfg_parser_attach(parser, &nzcfg->parser);
cfg_aclconfctx_attach(actx, &nzcfg->actx);
/*
* Attempt to create a parser and parse the newzones
* file. If successful, preserve both; otherwise leave
* them NULL.
*/
result = cfg_parser_create(view->mctx, ns_g_lctx, &nzparser);
if (result == ISC_R_SUCCESS)
result = cfg_parse_file(nzparser, view->new_zone_file,
&cfg_type_newzones, &nzconfig);
if (result == ISC_R_SUCCESS) {
cfg_parser_attach(nzparser, &nzcfg->nzparser);
cfg_obj_attach(nzconfig, &nzcfg->nzconfig);
}
if (nzparser != NULL) {
if (nzconfig != NULL)
cfg_obj_destroy(nzparser, &nzconfig);
cfg_parser_destroy(&nzparser);
}
return (ISC_R_SUCCESS);
}
static int
count_zones(const cfg_obj_t *conf) {
const cfg_obj_t *zonelist = NULL;
const cfg_listelt_t *element;
int n = 0;
REQUIRE(conf != NULL);
cfg_map_get(conf, "zone", &zonelist);
for (element = cfg_list_first(zonelist);
element != NULL;
element = cfg_list_next(element))
n++;
return (n);
}
static isc_result_t
load_configuration(const char *filename, ns_server_t *server,
isc_boolean_t first_time)
{
cfg_obj_t *config = NULL, *bindkeys = NULL;
cfg_parser_t *conf_parser = NULL, *bindkeys_parser = NULL;
const cfg_listelt_t *element;
const cfg_obj_t *builtin_views;
const cfg_obj_t *maps[3];
const cfg_obj_t *obj;
const cfg_obj_t *options;
const cfg_obj_t *usev4ports, *avoidv4ports, *usev6ports, *avoidv6ports;
const cfg_obj_t *views;
dns_view_t *view = NULL;
dns_view_t *view_next;
dns_viewlist_t tmpviewlist;
dns_viewlist_t viewlist, builtin_viewlist;
in_port_t listen_port, udpport_low, udpport_high;
int i;
isc_interval_t interval;
isc_portset_t *v4portset = NULL;
isc_portset_t *v6portset = NULL;
isc_resourcevalue_t nfiles;
isc_result_t result;
isc_uint32_t heartbeat_interval;
isc_uint32_t interface_interval;
isc_uint32_t reserved;
isc_uint32_t udpsize;
ns_cachelist_t cachelist, tmpcachelist;
unsigned int maxsocks;
ns_cache_t *nsc;
struct cfg_context *nzctx;
int num_zones = 0;
ISC_LIST_INIT(viewlist);
ISC_LIST_INIT(builtin_viewlist);
ISC_LIST_INIT(cachelist);
/* Ensure exclusive access to configuration data. */
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/* Create the ACL configuration context */
if (ns_g_aclconfctx != NULL)
cfg_aclconfctx_detach(&ns_g_aclconfctx);
CHECK(cfg_aclconfctx_create(ns_g_mctx, &ns_g_aclconfctx));
/*
* Parse the global default pseudo-config file.
*/
if (first_time) {
CHECK(ns_config_parsedefaults(ns_g_parser, &ns_g_config));
RUNTIME_CHECK(cfg_map_get(ns_g_config, "options",
&ns_g_defaults) == ISC_R_SUCCESS);
}
/*
* Parse the configuration file using the new config code.
*/
result = ISC_R_FAILURE;
config = NULL;
/*
* Unless this is lwresd with the -C option, parse the config file.
*/
if (!(ns_g_lwresdonly && lwresd_g_useresolvconf)) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_INFO, "loading configuration from '%s'",
filename);
CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &conf_parser));
cfg_parser_setcallback(conf_parser, directory_callback, NULL);
result = cfg_parse_file(conf_parser, filename,
&cfg_type_namedconf, &config);
}
/*
* If this is lwresd with the -C option, or lwresd with no -C or -c
* option where the above parsing failed, parse resolv.conf.
*/
if (ns_g_lwresdonly &&
(lwresd_g_useresolvconf ||
(!ns_g_conffileset && result == ISC_R_FILENOTFOUND)))
{
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_INFO, "loading configuration from '%s'",
lwresd_g_resolvconffile);
if (conf_parser != NULL)
cfg_parser_destroy(&conf_parser);
CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx, &conf_parser));
result = ns_lwresd_parseeresolvconf(ns_g_mctx, conf_parser,
&config);
}
CHECK(result);
/*
* Check the validity of the configuration.
*/
CHECK(bind9_check_namedconf(config, ns_g_lctx, ns_g_mctx));
/*
* Fill in the maps array, used for resolving defaults.
*/
i = 0;
options = NULL;
result = cfg_map_get(config, "options", &options);
if (result == ISC_R_SUCCESS)
maps[i++] = options;
maps[i++] = ns_g_defaults;
maps[i] = NULL;
/*
* If bind.keys exists, load it. If "dnssec-lookaside auto"
* is turned on, the keys found there will be used as default
* trust anchors.
*/
obj = NULL;
result = ns_config_get(maps, "bindkeys-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->bindkeysfile,
cfg_obj_asstring(obj)), "strdup");
if (access(server->bindkeysfile, R_OK) == 0) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"reading built-in trusted "
"keys from file '%s'", server->bindkeysfile);
CHECK(cfg_parser_create(ns_g_mctx, ns_g_lctx,
&bindkeys_parser));
result = cfg_parse_file(bindkeys_parser, server->bindkeysfile,
&cfg_type_bindkeys, &bindkeys);
CHECK(result);
}
/*
* Set process limits, which (usually) needs to be done as root.
*/
set_limits(maps);
/*
* Check if max number of open sockets that the system allows is
* sufficiently large. Failing this condition is not necessarily fatal,
* but may cause subsequent runtime failures for a busy recursive
* server.
*/
result = isc_socketmgr_getmaxsockets(ns_g_socketmgr, &maxsocks);
if (result != ISC_R_SUCCESS)
maxsocks = 0;
result = isc_resource_getcurlimit(isc_resource_openfiles, &nfiles);
if (result == ISC_R_SUCCESS && (isc_resourcevalue_t)maxsocks > nfiles) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"max open files (%" ISC_PRINT_QUADFORMAT "u)"
" is smaller than max sockets (%u)",
nfiles, maxsocks);
}
/*
* Set the number of socket reserved for TCP, stdio etc.
*/
obj = NULL;
result = ns_config_get(maps, "reserved-sockets", &obj);
INSIST(result == ISC_R_SUCCESS);
reserved = cfg_obj_asuint32(obj);
if (maxsocks != 0) {
if (maxsocks < 128U) /* Prevent underflow. */
reserved = 0;
else if (reserved > maxsocks - 128U) /* Minimum UDP space. */
reserved = maxsocks - 128;
}
/* Minimum TCP/stdio space. */
if (reserved < 128U)
reserved = 128;
if (reserved + 128U > maxsocks && maxsocks != 0) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"less than 128 UDP sockets available after "
"applying 'reserved-sockets' and 'maxsockets'");
}
isc__socketmgr_setreserved(ns_g_socketmgr, reserved);
/*
* Configure various server options.
*/
configure_server_quota(maps, "transfers-out", &server->xfroutquota);
configure_server_quota(maps, "tcp-clients", &server->tcpquota);
configure_server_quota(maps, "recursive-clients",
&server->recursionquota);
if (server->recursionquota.max > 1000)
isc_quota_soft(&server->recursionquota,
server->recursionquota.max - 100);
else
isc_quota_soft(&server->recursionquota, 0);
CHECK(configure_view_acl(NULL, config, "blackhole", NULL,
ns_g_aclconfctx, ns_g_mctx,
&server->blackholeacl));
if (server->blackholeacl != NULL)
dns_dispatchmgr_setblackhole(ns_g_dispatchmgr,
server->blackholeacl);
obj = NULL;
result = ns_config_get(maps, "match-mapped-addresses", &obj);
INSIST(result == ISC_R_SUCCESS);
server->aclenv.match_mapped = cfg_obj_asboolean(obj);
CHECKM(ns_statschannels_configure(ns_g_server, config, ns_g_aclconfctx),
"configuring statistics server(s)");
/*
* Configure sets of UDP query source ports.
*/
CHECKM(isc_portset_create(ns_g_mctx, &v4portset),
"creating UDP port set");
CHECKM(isc_portset_create(ns_g_mctx, &v6portset),
"creating UDP port set");
usev4ports = NULL;
usev6ports = NULL;
avoidv4ports = NULL;
avoidv6ports = NULL;
(void)ns_config_get(maps, "use-v4-udp-ports", &usev4ports);
if (usev4ports != NULL)
portset_fromconf(v4portset, usev4ports, ISC_TRUE);
else {
CHECKM(isc_net_getudpportrange(AF_INET, &udpport_low,
&udpport_high),
"get the default UDP/IPv4 port range");
if (udpport_low == udpport_high)
isc_portset_add(v4portset, udpport_low);
else {
isc_portset_addrange(v4portset, udpport_low,
udpport_high);
}
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"using default UDP/IPv4 port range: [%d, %d]",
udpport_low, udpport_high);
}
(void)ns_config_get(maps, "avoid-v4-udp-ports", &avoidv4ports);
if (avoidv4ports != NULL)
portset_fromconf(v4portset, avoidv4ports, ISC_FALSE);
(void)ns_config_get(maps, "use-v6-udp-ports", &usev6ports);
if (usev6ports != NULL)
portset_fromconf(v6portset, usev6ports, ISC_TRUE);
else {
CHECKM(isc_net_getudpportrange(AF_INET6, &udpport_low,
&udpport_high),
"get the default UDP/IPv6 port range");
if (udpport_low == udpport_high)
isc_portset_add(v6portset, udpport_low);
else {
isc_portset_addrange(v6portset, udpport_low,
udpport_high);
}
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"using default UDP/IPv6 port range: [%d, %d]",
udpport_low, udpport_high);
}
(void)ns_config_get(maps, "avoid-v6-udp-ports", &avoidv6ports);
if (avoidv6ports != NULL)
portset_fromconf(v6portset, avoidv6ports, ISC_FALSE);
dns_dispatchmgr_setavailports(ns_g_dispatchmgr, v4portset, v6portset);
/*
* Set the EDNS UDP size when we don't match a view.
*/
obj = NULL;
result = ns_config_get(maps, "edns-udp-size", &obj);
INSIST(result == ISC_R_SUCCESS);
udpsize = cfg_obj_asuint32(obj);
if (udpsize < 512)
udpsize = 512;
if (udpsize > 4096)
udpsize = 4096;
ns_g_udpsize = (isc_uint16_t)udpsize;
/*
* Configure the zone manager.
*/
obj = NULL;
result = ns_config_get(maps, "transfers-in", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_settransfersin(server->zonemgr, cfg_obj_asuint32(obj));
obj = NULL;
result = ns_config_get(maps, "transfers-per-ns", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_settransfersperns(server->zonemgr, cfg_obj_asuint32(obj));
obj = NULL;
result = ns_config_get(maps, "serial-query-rate", &obj);
INSIST(result == ISC_R_SUCCESS);
dns_zonemgr_setserialqueryrate(server->zonemgr, cfg_obj_asuint32(obj));
/*
* Determine which port to use for listening for incoming connections.
*/
if (ns_g_port != 0)
listen_port = ns_g_port;
else
CHECKM(ns_config_getport(config, &listen_port), "port");
/*
* Find the listen queue depth.
*/
obj = NULL;
result = ns_config_get(maps, "tcp-listen-queue", &obj);
INSIST(result == ISC_R_SUCCESS);
ns_g_listen = cfg_obj_asuint32(obj);
if (ns_g_listen < 3)
ns_g_listen = 3;
/*
* Configure the interface manager according to the "listen-on"
* statement.
*/
{
const cfg_obj_t *clistenon = NULL;
ns_listenlist_t *listenon = NULL;
clistenon = NULL;
/*
* Even though listen-on is present in the default
* configuration, we can't use it here, since it isn't
* used if we're in lwresd mode. This way is easier.
*/
if (options != NULL)
(void)cfg_map_get(options, "listen-on", &clistenon);
if (clistenon != NULL) {
/* check return code? */
(void)ns_listenlist_fromconfig(clistenon, config,
ns_g_aclconfctx,
ns_g_mctx, &listenon);
} else if (!ns_g_lwresdonly) {
/*
* Not specified, use default.
*/
CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
ISC_TRUE, &listenon));
}
if (listenon != NULL) {
ns_interfacemgr_setlistenon4(server->interfacemgr,
listenon);
ns_listenlist_detach(&listenon);
}
}
/*
* Ditto for IPv6.
*/
{
const cfg_obj_t *clistenon = NULL;
ns_listenlist_t *listenon = NULL;
if (options != NULL)
(void)cfg_map_get(options, "listen-on-v6", &clistenon);
if (clistenon != NULL) {
/* check return code? */
(void)ns_listenlist_fromconfig(clistenon, config,
ns_g_aclconfctx,
ns_g_mctx, &listenon);
} else if (!ns_g_lwresdonly) {
isc_boolean_t enable;
/*
* Not specified, use default.
*/
enable = ISC_TF(isc_net_probeipv4() != ISC_R_SUCCESS);
CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
enable, &listenon));
}
if (listenon != NULL) {
ns_interfacemgr_setlistenon6(server->interfacemgr,
listenon);
ns_listenlist_detach(&listenon);
}
}
/*
* Rescan the interface list to pick up changes in the
* listen-on option. It's important that we do this before we try
* to configure the query source, since the dispatcher we use might
* be shared with an interface.
*/
scan_interfaces(server, ISC_TRUE);
/*
* Arrange for further interface scanning to occur periodically
* as specified by the "interface-interval" option.
*/
obj = NULL;
result = ns_config_get(maps, "interface-interval", &obj);
INSIST(result == ISC_R_SUCCESS);
interface_interval = cfg_obj_asuint32(obj) * 60;
if (interface_interval == 0) {
CHECK(isc_timer_reset(server->interface_timer,
isc_timertype_inactive,
NULL, NULL, ISC_TRUE));
} else if (server->interface_interval != interface_interval) {
isc_interval_set(&interval, interface_interval, 0);
CHECK(isc_timer_reset(server->interface_timer,
isc_timertype_ticker,
NULL, &interval, ISC_FALSE));
}
server->interface_interval = interface_interval;
/*
* Configure the dialup heartbeat timer.
*/
obj = NULL;
result = ns_config_get(maps, "heartbeat-interval", &obj);
INSIST(result == ISC_R_SUCCESS);
heartbeat_interval = cfg_obj_asuint32(obj) * 60;
if (heartbeat_interval == 0) {
CHECK(isc_timer_reset(server->heartbeat_timer,
isc_timertype_inactive,
NULL, NULL, ISC_TRUE));
} else if (server->heartbeat_interval != heartbeat_interval) {
isc_interval_set(&interval, heartbeat_interval, 0);
CHECK(isc_timer_reset(server->heartbeat_timer,
isc_timertype_ticker,
NULL, &interval, ISC_FALSE));
}
server->heartbeat_interval = heartbeat_interval;
isc_interval_set(&interval, 1200, 0);
CHECK(isc_timer_reset(server->pps_timer, isc_timertype_ticker, NULL,
&interval, ISC_FALSE));
/*
* Write the PID file.
*/
obj = NULL;
if (ns_config_get(maps, "pid-file", &obj) == ISC_R_SUCCESS)
if (cfg_obj_isvoid(obj))
ns_os_writepidfile(NULL, first_time);
else
ns_os_writepidfile(cfg_obj_asstring(obj), first_time);
else if (ns_g_lwresdonly)
ns_os_writepidfile(lwresd_g_defaultpidfile, first_time);
else
ns_os_writepidfile(ns_g_defaultpidfile, first_time);
/*
* Configure the server-wide session key. This must be done before
* configure views because zone configuration may need to know
* session-keyname.
*
* Failure of session key generation isn't fatal at this time; if it
* turns out that a session key is really needed but doesn't exist,
* we'll treat it as a fatal error then.
*/
(void)configure_session_key(maps, server, ns_g_mctx);
views = NULL;
(void)cfg_map_get(config, "view", &views);
/*
* Create the views and count all the configured zones in
* order to correctly size the zone manager's task table.
* (We only count zones for configured views; the built-in
* "bind" view can be ignored as it only adds a negligible
* number of zones.)
*
* If we're allowing new zones, we need to be able to find the
* new zone file and count those as well. So we setup the new
* zone configuration context, but otherwise view configuration
* waits until after the zone manager's task list has been sized.
*/
for (element = cfg_list_first(views);
element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *vconfig = cfg_listelt_value(element);
const cfg_obj_t *voptions = cfg_tuple_get(vconfig, "options");
view = NULL;
CHECK(create_view(vconfig, &viewlist, &view));
INSIST(view != NULL);
num_zones += count_zones(voptions);
CHECK(setup_newzones(view, config, vconfig, conf_parser,
ns_g_aclconfctx));
nzctx = view->new_zone_config;
if (nzctx != NULL && nzctx->nzconfig != NULL)
num_zones += count_zones(nzctx->nzconfig);
dns_view_detach(&view);
}
/*
* If there were no explicit views then we do the default
* view here.
*/
if (views == NULL) {
CHECK(create_view(NULL, &viewlist, &view));
INSIST(view != NULL);
num_zones = count_zones(config);
CHECK(setup_newzones(view, config, NULL, conf_parser,
ns_g_aclconfctx));
nzctx = view->new_zone_config;
if (nzctx != NULL && nzctx->nzconfig != NULL)
num_zones += count_zones(nzctx->nzconfig);
dns_view_detach(&view);
}
/*
* Zones have been counted; set the zone manager task pool size.
*/
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"sizing zone task pool based on %d zones", num_zones);
CHECK(dns_zonemgr_setsize(ns_g_server->zonemgr, num_zones));
/*
* Configure and freeze all explicit views. Explicit
* views that have zones were already created at parsing
* time, but views with no zones must be created here.
*/
for (element = cfg_list_first(views);
element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *vconfig = cfg_listelt_value(element);
view = NULL;
CHECK(find_view(vconfig, &viewlist, &view));
CHECK(configure_view(view, config, vconfig,
&cachelist, bindkeys, ns_g_mctx,
ns_g_aclconfctx, ISC_TRUE));
dns_view_freeze(view);
dns_view_detach(&view);
}
/*
* Make sure we have a default view if and only if there
* were no explicit views.
*/
if (views == NULL) {
view = NULL;
CHECK(find_view(NULL, &viewlist, &view));
CHECK(configure_view(view, config, NULL,
&cachelist, bindkeys,
ns_g_mctx, ns_g_aclconfctx, ISC_TRUE));
dns_view_freeze(view);
dns_view_detach(&view);
}
/*
* Create (or recreate) the built-in views.
*/
builtin_views = NULL;
RUNTIME_CHECK(cfg_map_get(ns_g_config, "view",
&builtin_views) == ISC_R_SUCCESS);
for (element = cfg_list_first(builtin_views);
element != NULL;
element = cfg_list_next(element))
{
cfg_obj_t *vconfig = cfg_listelt_value(element);
CHECK(create_view(vconfig, &builtin_viewlist, &view));
CHECK(configure_view(view, config, vconfig,
&cachelist, bindkeys,
ns_g_mctx, ns_g_aclconfctx, ISC_FALSE));
dns_view_freeze(view);
dns_view_detach(&view);
view = NULL;
}
/* Now combine the two viewlists into one */
ISC_LIST_APPENDLIST(viewlist, builtin_viewlist, link);
/* Swap our new view list with the production one. */
tmpviewlist = server->viewlist;
server->viewlist = viewlist;
viewlist = tmpviewlist;
/* Make the view list available to each of the views */
view = ISC_LIST_HEAD(server->viewlist);
while (view != NULL) {
view->viewlist = &server->viewlist;
view = ISC_LIST_NEXT(view, link);
}
/* Swap our new cache list with the production one. */
tmpcachelist = server->cachelist;
server->cachelist = cachelist;
cachelist = tmpcachelist;
/* Load the TKEY information from the configuration. */
if (options != NULL) {
dns_tkeyctx_t *t = NULL;
CHECKM(ns_tkeyctx_fromconfig(options, ns_g_mctx, ns_g_entropy,
&t),
"configuring TKEY");
if (server->tkeyctx != NULL)
dns_tkeyctx_destroy(&server->tkeyctx);
server->tkeyctx = t;
}
/*
* Bind the control port(s).
*/
CHECKM(ns_controls_configure(ns_g_server->controls, config,
ns_g_aclconfctx),
"binding control channel(s)");
/*
* Bind the lwresd port(s).
*/
CHECKM(ns_lwresd_configure(ns_g_mctx, config),
"binding lightweight resolver ports");
/*
* Open the source of entropy.
*/
if (first_time) {
obj = NULL;
result = ns_config_get(maps, "random-device", &obj);
if (result != ISC_R_SUCCESS) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"no source of entropy found");
} else {
const char *randomdev = cfg_obj_asstring(obj);
result = isc_entropy_createfilesource(ns_g_entropy,
randomdev);
if (result != ISC_R_SUCCESS)
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_INFO,
"could not open entropy source "
"%s: %s",
randomdev,
isc_result_totext(result));
#ifdef PATH_RANDOMDEV
if (ns_g_fallbackentropy != NULL) {
if (result != ISC_R_SUCCESS) {
isc_log_write(ns_g_lctx,
NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER,
ISC_LOG_INFO,
"using pre-chroot entropy source "
"%s",
PATH_RANDOMDEV);
isc_entropy_detach(&ns_g_entropy);
isc_entropy_attach(ns_g_fallbackentropy,
&ns_g_entropy);
}
isc_entropy_detach(&ns_g_fallbackentropy);
}
#endif
}
}
/*
* Relinquish root privileges.
*/
if (first_time)
ns_os_changeuser();
/*
* Check that the working directory is writable.
*/
if (access(".", W_OK) != 0) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"the working directory is not writable");
}
/*
* Configure the logging system.
*
* Do this after changing UID to make sure that any log
* files specified in named.conf get created by the
* unprivileged user, not root.
*/
if (ns_g_logstderr) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"ignoring config file logging "
"statement due to -g option");
} else {
const cfg_obj_t *logobj = NULL;
isc_logconfig_t *logc = NULL;
CHECKM(isc_logconfig_create(ns_g_lctx, &logc),
"creating new logging configuration");
logobj = NULL;
(void)cfg_map_get(config, "logging", &logobj);
if (logobj != NULL) {
CHECKM(ns_log_configure(logc, logobj),
"configuring logging");
} else {
CHECKM(ns_log_setdefaultchannels(logc),
"setting up default logging channels");
CHECKM(ns_log_setunmatchedcategory(logc),
"setting up default 'category unmatched'");
CHECKM(ns_log_setdefaultcategory(logc),
"setting up default 'category default'");
}
result = isc_logconfig_use(ns_g_lctx, logc);
if (result != ISC_R_SUCCESS) {
isc_logconfig_destroy(&logc);
CHECKM(result, "installing logging configuration");
}
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_DEBUG(1),
"now using logging configuration from "
"config file");
}
/*
* Set the default value of the query logging flag depending
* whether a "queries" category has been defined. This is
* a disgusting hack, but we need to do this for BIND 8
* compatibility.
*/
if (first_time) {
const cfg_obj_t *logobj = NULL;
const cfg_obj_t *categories = NULL;
obj = NULL;
if (ns_config_get(maps, "querylog", &obj) == ISC_R_SUCCESS) {
server->log_queries = cfg_obj_asboolean(obj);
} else {
(void)cfg_map_get(config, "logging", &logobj);
if (logobj != NULL)
(void)cfg_map_get(logobj, "category",
&categories);
if (categories != NULL) {
const cfg_listelt_t *element;
for (element = cfg_list_first(categories);
element != NULL;
element = cfg_list_next(element))
{
const cfg_obj_t *catobj;
const char *str;
obj = cfg_listelt_value(element);
catobj = cfg_tuple_get(obj, "name");
str = cfg_obj_asstring(catobj);
if (strcasecmp(str, "queries") == 0)
server->log_queries = ISC_TRUE;
}
}
}
}
obj = NULL;
if (options != NULL &&
cfg_map_get(options, "memstatistics", &obj) == ISC_R_SUCCESS)
ns_g_memstatistics = cfg_obj_asboolean(obj);
else
ns_g_memstatistics =
ISC_TF((isc_mem_debugging & ISC_MEM_DEBUGRECORD) != 0);
obj = NULL;
if (ns_config_get(maps, "memstatistics-file", &obj) == ISC_R_SUCCESS)
ns_main_setmemstats(cfg_obj_asstring(obj));
else if (ns_g_memstatistics)
ns_main_setmemstats("named.memstats");
else
ns_main_setmemstats(NULL);
obj = NULL;
result = ns_config_get(maps, "statistics-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->statsfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = ns_config_get(maps, "dump-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->dumpfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = ns_config_get(maps, "secroots-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->secrootsfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = ns_config_get(maps, "recursing-file", &obj);
INSIST(result == ISC_R_SUCCESS);
CHECKM(setstring(server, &server->recfile, cfg_obj_asstring(obj)),
"strdup");
obj = NULL;
result = ns_config_get(maps, "version", &obj);
if (result == ISC_R_SUCCESS) {
CHECKM(setoptstring(server, &server->version, obj), "strdup");
server->version_set = ISC_TRUE;
} else {
server->version_set = ISC_FALSE;
}
obj = NULL;
result = ns_config_get(maps, "hostname", &obj);
if (result == ISC_R_SUCCESS) {
CHECKM(setoptstring(server, &server->hostname, obj), "strdup");
server->hostname_set = ISC_TRUE;
} else {
server->hostname_set = ISC_FALSE;
}
obj = NULL;
result = ns_config_get(maps, "server-id", &obj);
server->server_usehostname = ISC_FALSE;
if (result == ISC_R_SUCCESS && cfg_obj_isboolean(obj)) {
/* The parser translates "hostname" to ISC_TRUE */
server->server_usehostname = cfg_obj_asboolean(obj);
result = setstring(server, &server->server_id, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
} else if (result == ISC_R_SUCCESS) {
/* Found a quoted string */
CHECKM(setoptstring(server, &server->server_id, obj), "strdup");
} else {
result = setstring(server, &server->server_id, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
}
obj = NULL;
result = ns_config_get(maps, "flush-zones-on-shutdown", &obj);
if (result == ISC_R_SUCCESS) {
server->flushonshutdown = cfg_obj_asboolean(obj);
} else {
server->flushonshutdown = ISC_FALSE;
}
result = ISC_R_SUCCESS;
cleanup:
if (v4portset != NULL)
isc_portset_destroy(ns_g_mctx, &v4portset);
if (v6portset != NULL)
isc_portset_destroy(ns_g_mctx, &v6portset);
if (conf_parser != NULL) {
if (config != NULL)
cfg_obj_destroy(conf_parser, &config);
cfg_parser_destroy(&conf_parser);
}
if (bindkeys_parser != NULL) {
if (bindkeys != NULL)
cfg_obj_destroy(bindkeys_parser, &bindkeys);
cfg_parser_destroy(&bindkeys_parser);
}
if (view != NULL)
dns_view_detach(&view);
/*
* This cleans up either the old production view list
* or our temporary list depending on whether they
* were swapped above or not.
*/
for (view = ISC_LIST_HEAD(viewlist);
view != NULL;
view = view_next) {
view_next = ISC_LIST_NEXT(view, link);
ISC_LIST_UNLINK(viewlist, view, link);
if (result == ISC_R_SUCCESS &&
strcmp(view->name, "_bind") != 0)
(void)dns_zt_apply(view->zonetable, ISC_FALSE,
removed, view);
dns_view_detach(&view);
}
/* Same cleanup for cache list. */
while ((nsc = ISC_LIST_HEAD(cachelist)) != NULL) {
ISC_LIST_UNLINK(cachelist, nsc, link);
dns_cache_detach(&nsc->cache);
isc_mem_put(server->mctx, nsc, sizeof(*nsc));
}
/*
* Adjust the listening interfaces in accordance with the source
* addresses specified in views and zones.
*/
if (isc_net_probeipv6() == ISC_R_SUCCESS)
adjust_interfaces(server, ns_g_mctx);
/* Relinquish exclusive access to configuration data. */
isc_task_endexclusive(server->task);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_DEBUG(1), "load_configuration: %s",
isc_result_totext(result));
return (result);
}
static isc_result_t
load_zones(ns_server_t *server, isc_boolean_t stop) {
isc_result_t result;
dns_view_t *view;
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/*
* Load zone data from disk.
*/
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
CHECK(dns_view_load(view, stop));
if (view->managed_keys != NULL)
CHECK(dns_zone_load(view->managed_keys));
}
/*
* Force zone maintenance. Do this after loading
* so that we know when we need to force AXFR of
* slave zones whose master files are missing.
*/
CHECK(dns_zonemgr_forcemaint(server->zonemgr));
cleanup:
isc_task_endexclusive(server->task);
return (result);
}
static isc_result_t
load_new_zones(ns_server_t *server, isc_boolean_t stop) {
isc_result_t result;
dns_view_t *view;
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/*
* Load zone data from disk.
*/
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
CHECK(dns_view_loadnew(view, stop));
/* Load managed-keys data */
if (view->managed_keys != NULL)
CHECK(dns_zone_loadnew(view->managed_keys));
}
/*
* Resume zone XFRs.
*/
dns_zonemgr_resumexfrs(server->zonemgr);
cleanup:
isc_task_endexclusive(server->task);
return (result);
}
static void
run_server(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
ns_server_t *server = (ns_server_t *)event->ev_arg;
INSIST(task == server->task);
isc_event_free(&event);
CHECKFATAL(dns_dispatchmgr_create(ns_g_mctx, ns_g_entropy,
&ns_g_dispatchmgr),
"creating dispatch manager");
dns_dispatchmgr_setstats(ns_g_dispatchmgr, server->resolverstats);
CHECKFATAL(ns_interfacemgr_create(ns_g_mctx, ns_g_taskmgr,
ns_g_socketmgr, ns_g_dispatchmgr,
&server->interfacemgr),
"creating interface manager");
CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
NULL, NULL, server->task,
interface_timer_tick,
server, &server->interface_timer),
"creating interface timer");
CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
NULL, NULL, server->task,
heartbeat_timer_tick,
server, &server->heartbeat_timer),
"creating heartbeat timer");
CHECKFATAL(isc_timer_create(ns_g_timermgr, isc_timertype_inactive,
NULL, NULL, server->task, pps_timer_tick,
server, &server->pps_timer),
"creating pps timer");
CHECKFATAL(cfg_parser_create(ns_g_mctx, NULL, &ns_g_parser),
"creating default configuration parser");
if (ns_g_lwresdonly)
CHECKFATAL(load_configuration(lwresd_g_conffile, server,
ISC_TRUE),
"loading configuration");
else
CHECKFATAL(load_configuration(ns_g_conffile, server, ISC_TRUE),
"loading configuration");
isc_hash_init();
CHECKFATAL(load_zones(server, ISC_FALSE), "loading zones");
ns_os_started();
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_NOTICE, "running");
}
void
ns_server_flushonshutdown(ns_server_t *server, isc_boolean_t flush) {
REQUIRE(NS_SERVER_VALID(server));
server->flushonshutdown = flush;
}
static void
shutdown_server(isc_task_t *task, isc_event_t *event) {
isc_result_t result;
dns_view_t *view, *view_next;
ns_server_t *server = (ns_server_t *)event->ev_arg;
isc_boolean_t flush = server->flushonshutdown;
ns_cache_t *nsc;
UNUSED(task);
INSIST(task == server->task);
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_INFO, "shutting down%s",
flush ? ": flushing changes" : "");
ns_statschannels_shutdown(server);
ns_controls_shutdown(server->controls);
end_reserved_dispatches(server, ISC_TRUE);
cleanup_session_key(server, server->mctx);
if (ns_g_aclconfctx != NULL)
cfg_aclconfctx_detach(&ns_g_aclconfctx);
cfg_obj_destroy(ns_g_parser, &ns_g_config);
cfg_parser_destroy(&ns_g_parser);
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = view_next) {
view_next = ISC_LIST_NEXT(view, link);
ISC_LIST_UNLINK(server->viewlist, view, link);
if (flush)
dns_view_flushanddetach(&view);
else
dns_view_detach(&view);
}
while ((nsc = ISC_LIST_HEAD(server->cachelist)) != NULL) {
ISC_LIST_UNLINK(server->cachelist, nsc, link);
dns_cache_detach(&nsc->cache);
isc_mem_put(server->mctx, nsc, sizeof(*nsc));
}
isc_timer_detach(&server->interface_timer);
isc_timer_detach(&server->heartbeat_timer);
isc_timer_detach(&server->pps_timer);
ns_interfacemgr_shutdown(server->interfacemgr);
ns_interfacemgr_detach(&server->interfacemgr);
dns_dispatchmgr_destroy(&ns_g_dispatchmgr);
dns_zonemgr_shutdown(server->zonemgr);
if (ns_g_sessionkey != NULL) {
dns_tsigkey_detach(&ns_g_sessionkey);
dns_name_free(&ns_g_sessionkeyname, server->mctx);
}
if (server->blackholeacl != NULL)
dns_acl_detach(&server->blackholeacl);
dns_db_detach(&server->in_roothints);
isc_task_endexclusive(server->task);
isc_task_detach(&server->task);
isc_event_free(&event);
}
void
ns_server_create(isc_mem_t *mctx, ns_server_t **serverp) {
isc_result_t result;
ns_server_t *server = isc_mem_get(mctx, sizeof(*server));
if (server == NULL)
fatal("allocating server object", ISC_R_NOMEMORY);
server->mctx = mctx;
server->task = NULL;
/* Initialize configuration data with default values. */
result = isc_quota_init(&server->xfroutquota, 10);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = isc_quota_init(&server->tcpquota, 10);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = isc_quota_init(&server->recursionquota, 100);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_aclenv_init(mctx, &server->aclenv);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
/* Initialize server data structures. */
server->zonemgr = NULL;
server->interfacemgr = NULL;
ISC_LIST_INIT(server->viewlist);
server->in_roothints = NULL;
server->blackholeacl = NULL;
CHECKFATAL(dns_rootns_create(mctx, dns_rdataclass_in, NULL,
&server->in_roothints),
"setting up root hints");
CHECKFATAL(isc_mutex_init(&server->reload_event_lock),
"initializing reload event lock");
server->reload_event =
isc_event_allocate(ns_g_mctx, server,
NS_EVENT_RELOAD,
ns_server_reload,
server,
sizeof(isc_event_t));
CHECKFATAL(server->reload_event == NULL ?
ISC_R_NOMEMORY : ISC_R_SUCCESS,
"allocating reload event");
CHECKFATAL(dst_lib_init2(ns_g_mctx, ns_g_entropy,
ns_g_engine, ISC_ENTROPY_GOODONLY),
"initializing DST");
server->tkeyctx = NULL;
CHECKFATAL(dns_tkeyctx_create(ns_g_mctx, ns_g_entropy,
&server->tkeyctx),
"creating TKEY context");
/*
* Setup the server task, which is responsible for coordinating
* startup and shutdown of the server.
*/
CHECKFATAL(isc_task_create(ns_g_taskmgr, 0, &server->task),
"creating server task");
isc_task_setname(server->task, "server", server);
CHECKFATAL(isc_task_onshutdown(server->task, shutdown_server, server),
"isc_task_onshutdown");
CHECKFATAL(isc_app_onrun(ns_g_mctx, server->task, run_server, server),
"isc_app_onrun");
server->interface_timer = NULL;
server->heartbeat_timer = NULL;
server->pps_timer = NULL;
server->interface_interval = 0;
server->heartbeat_interval = 0;
CHECKFATAL(dns_zonemgr_create(ns_g_mctx, ns_g_taskmgr, ns_g_timermgr,
ns_g_socketmgr, &server->zonemgr),
"dns_zonemgr_create");
CHECKFATAL(dns_zonemgr_setsize(server->zonemgr, 1000),
"dns_zonemgr_setsize");
server->statsfile = isc_mem_strdup(server->mctx, "named.stats");
CHECKFATAL(server->statsfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
"isc_mem_strdup");
server->nsstats = NULL;
server->rcvquerystats = NULL;
server->opcodestats = NULL;
server->zonestats = NULL;
server->resolverstats = NULL;
server->sockstats = NULL;
CHECKFATAL(isc_stats_create(server->mctx, &server->sockstats,
isc_sockstatscounter_max),
"isc_stats_create");
isc_socketmgr_setstats(ns_g_socketmgr, server->sockstats);
server->bindkeysfile = isc_mem_strdup(server->mctx, "bind.keys");
CHECKFATAL(server->bindkeysfile == NULL ? ISC_R_NOMEMORY :
ISC_R_SUCCESS,
"isc_mem_strdup");
server->dumpfile = isc_mem_strdup(server->mctx, "named_dump.db");
CHECKFATAL(server->dumpfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
"isc_mem_strdup");
server->secrootsfile = isc_mem_strdup(server->mctx, "named.secroots");
CHECKFATAL(server->secrootsfile == NULL ? ISC_R_NOMEMORY :
ISC_R_SUCCESS,
"isc_mem_strdup");
server->recfile = isc_mem_strdup(server->mctx, "named.recursing");
CHECKFATAL(server->recfile == NULL ? ISC_R_NOMEMORY : ISC_R_SUCCESS,
"isc_mem_strdup");
server->hostname_set = ISC_FALSE;
server->hostname = NULL;
server->version_set = ISC_FALSE;
server->version = NULL;
server->server_usehostname = ISC_FALSE;
server->server_id = NULL;
CHECKFATAL(isc_stats_create(ns_g_mctx, &server->nsstats,
dns_nsstatscounter_max),
"dns_stats_create (server)");
CHECKFATAL(dns_rdatatypestats_create(ns_g_mctx,
&server->rcvquerystats),
"dns_stats_create (rcvquery)");
CHECKFATAL(dns_opcodestats_create(ns_g_mctx, &server->opcodestats),
"dns_stats_create (opcode)");
CHECKFATAL(isc_stats_create(ns_g_mctx, &server->zonestats,
dns_zonestatscounter_max),
"dns_stats_create (zone)");
CHECKFATAL(isc_stats_create(ns_g_mctx, &server->resolverstats,
dns_resstatscounter_max),
"dns_stats_create (resolver)");
server->flushonshutdown = ISC_FALSE;
server->log_queries = ISC_FALSE;
server->controls = NULL;
CHECKFATAL(ns_controls_create(server, &server->controls),
"ns_controls_create");
server->dispatchgen = 0;
ISC_LIST_INIT(server->dispatches);
ISC_LIST_INIT(server->statschannels);
ISC_LIST_INIT(server->cachelist);
server->sessionkey = NULL;
server->session_keyfile = NULL;
server->session_keyname = NULL;
server->session_keyalg = DST_ALG_UNKNOWN;
server->session_keybits = 0;
server->magic = NS_SERVER_MAGIC;
*serverp = server;
}
void
ns_server_destroy(ns_server_t **serverp) {
ns_server_t *server = *serverp;
REQUIRE(NS_SERVER_VALID(server));
ns_controls_destroy(&server->controls);
isc_stats_detach(&server->nsstats);
dns_stats_detach(&server->rcvquerystats);
dns_stats_detach(&server->opcodestats);
isc_stats_detach(&server->zonestats);
isc_stats_detach(&server->resolverstats);
isc_stats_detach(&server->sockstats);
isc_mem_free(server->mctx, server->statsfile);
isc_mem_free(server->mctx, server->bindkeysfile);
isc_mem_free(server->mctx, server->dumpfile);
isc_mem_free(server->mctx, server->secrootsfile);
isc_mem_free(server->mctx, server->recfile);
if (server->version != NULL)
isc_mem_free(server->mctx, server->version);
if (server->hostname != NULL)
isc_mem_free(server->mctx, server->hostname);
if (server->server_id != NULL)
isc_mem_free(server->mctx, server->server_id);
if (server->zonemgr != NULL)
dns_zonemgr_detach(&server->zonemgr);
if (server->tkeyctx != NULL)
dns_tkeyctx_destroy(&server->tkeyctx);
dst_lib_destroy();
isc_event_free(&server->reload_event);
INSIST(ISC_LIST_EMPTY(server->viewlist));
INSIST(ISC_LIST_EMPTY(server->cachelist));
dns_aclenv_destroy(&server->aclenv);
isc_quota_destroy(&server->recursionquota);
isc_quota_destroy(&server->tcpquota);
isc_quota_destroy(&server->xfroutquota);
server->magic = 0;
isc_mem_put(server->mctx, server, sizeof(*server));
*serverp = NULL;
}
static void
fatal(const char *msg, isc_result_t result) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_CRITICAL, "%s: %s", msg,
isc_result_totext(result));
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
ISC_LOG_CRITICAL, "exiting (due to fatal error)");
exit(1);
}
static void
start_reserved_dispatches(ns_server_t *server) {
REQUIRE(NS_SERVER_VALID(server));
server->dispatchgen++;
}
static void
end_reserved_dispatches(ns_server_t *server, isc_boolean_t all) {
ns_dispatch_t *dispatch, *nextdispatch;
REQUIRE(NS_SERVER_VALID(server));
for (dispatch = ISC_LIST_HEAD(server->dispatches);
dispatch != NULL;
dispatch = nextdispatch) {
nextdispatch = ISC_LIST_NEXT(dispatch, link);
if (!all && server->dispatchgen == dispatch-> dispatchgen)
continue;
ISC_LIST_UNLINK(server->dispatches, dispatch, link);
dns_dispatch_detach(&dispatch->dispatch);
isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
}
}
void
ns_add_reserved_dispatch(ns_server_t *server, const isc_sockaddr_t *addr) {
ns_dispatch_t *dispatch;
in_port_t port;
char addrbuf[ISC_SOCKADDR_FORMATSIZE];
isc_result_t result;
unsigned int attrs, attrmask;
REQUIRE(NS_SERVER_VALID(server));
port = isc_sockaddr_getport(addr);
if (port == 0 || port >= 1024)
return;
for (dispatch = ISC_LIST_HEAD(server->dispatches);
dispatch != NULL;
dispatch = ISC_LIST_NEXT(dispatch, link)) {
if (isc_sockaddr_equal(&dispatch->addr, addr))
break;
}
if (dispatch != NULL) {
dispatch->dispatchgen = server->dispatchgen;
return;
}
dispatch = isc_mem_get(server->mctx, sizeof(*dispatch));
if (dispatch == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
dispatch->addr = *addr;
dispatch->dispatchgen = server->dispatchgen;
dispatch->dispatch = NULL;
attrs = 0;
attrs |= DNS_DISPATCHATTR_UDP;
switch (isc_sockaddr_pf(addr)) {
case AF_INET:
attrs |= DNS_DISPATCHATTR_IPV4;
break;
case AF_INET6:
attrs |= DNS_DISPATCHATTR_IPV6;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto cleanup;
}
attrmask = 0;
attrmask |= DNS_DISPATCHATTR_UDP;
attrmask |= DNS_DISPATCHATTR_TCP;
attrmask |= DNS_DISPATCHATTR_IPV4;
attrmask |= DNS_DISPATCHATTR_IPV6;
result = dns_dispatch_getudp(ns_g_dispatchmgr, ns_g_socketmgr,
ns_g_taskmgr, &dispatch->addr, 4096,
1000, 32768, 16411, 16433,
attrs, attrmask, &dispatch->dispatch);
if (result != ISC_R_SUCCESS)
goto cleanup;
ISC_LIST_INITANDPREPEND(server->dispatches, dispatch, link);
return;
cleanup:
if (dispatch != NULL)
isc_mem_put(server->mctx, dispatch, sizeof(*dispatch));
isc_sockaddr_format(addr, addrbuf, sizeof(addrbuf));
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"unable to create dispatch for reserved port %s: %s",
addrbuf, isc_result_totext(result));
}
static isc_result_t
loadconfig(ns_server_t *server) {
isc_result_t result;
start_reserved_dispatches(server);
result = load_configuration(ns_g_lwresdonly ?
lwresd_g_conffile : ns_g_conffile,
server, ISC_FALSE);
if (result == ISC_R_SUCCESS) {
end_reserved_dispatches(server, ISC_FALSE);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"reloading configuration succeeded");
} else {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"reloading configuration failed: %s",
isc_result_totext(result));
}
return (result);
}
static isc_result_t
reload(ns_server_t *server) {
isc_result_t result;
CHECK(loadconfig(server));
result = load_zones(server, ISC_FALSE);
if (result == ISC_R_SUCCESS)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"reloading zones succeeded");
else
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"reloading zones failed: %s",
isc_result_totext(result));
cleanup:
return (result);
}
static void
reconfig(ns_server_t *server) {
isc_result_t result;
CHECK(loadconfig(server));
result = load_new_zones(server, ISC_FALSE);
if (result == ISC_R_SUCCESS)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"any newly configured zones are now loaded");
else
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"loading new zones failed: %s",
isc_result_totext(result));
cleanup: ;
}
/*
* Handle a reload event (from SIGHUP).
*/
static void
ns_server_reload(isc_task_t *task, isc_event_t *event) {
ns_server_t *server = (ns_server_t *)event->ev_arg;
INSIST(task = server->task);
UNUSED(task);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"received SIGHUP signal to reload zones");
(void)reload(server);
LOCK(&server->reload_event_lock);
INSIST(server->reload_event == NULL);
server->reload_event = event;
UNLOCK(&server->reload_event_lock);
}
void
ns_server_reloadwanted(ns_server_t *server) {
LOCK(&server->reload_event_lock);
if (server->reload_event != NULL)
isc_task_send(server->task, &server->reload_event);
UNLOCK(&server->reload_event_lock);
}
static char *
next_token(char **stringp, const char *delim) {
char *res;
do {
res = strsep(stringp, delim);
if (res == NULL)
break;
} while (*res == '\0');
return (res);
}
/*
* Find the zone specified in the control channel command 'args',
* if any. If a zone is specified, point '*zonep' at it, otherwise
* set '*zonep' to NULL.
*/
static isc_result_t
zone_from_args(ns_server_t *server, char *args, dns_zone_t **zonep,
const char **zonename)
{
char *input, *ptr;
const char *zonetxt;
char *classtxt;
const char *viewtxt = NULL;
dns_fixedname_t name;
isc_result_t result;
isc_buffer_t buf;
dns_view_t *view = NULL;
dns_rdataclass_t rdclass;
REQUIRE(zonep != NULL && *zonep == NULL);
input = args;
/* Skip the command name. */
ptr = next_token(&input, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
/* Look for the zone name. */
zonetxt = next_token(&input, " \t");
if (zonetxt == NULL)
return (ISC_R_SUCCESS);
if (zonename)
*zonename = zonetxt;
/* Look for the optional class name. */
classtxt = next_token(&input, " \t");
if (classtxt != NULL) {
/* Look for the optional view name. */
viewtxt = next_token(&input, " \t");
}
isc_buffer_init(&buf, zonetxt, strlen(zonetxt));
isc_buffer_add(&buf, strlen(zonetxt));
dns_fixedname_init(&name);
result = dns_name_fromtext(dns_fixedname_name(&name),
&buf, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS)
goto fail1;
if (classtxt != NULL) {
isc_textregion_t r;
r.base = classtxt;
r.length = strlen(classtxt);
result = dns_rdataclass_fromtext(&rdclass, &r);
if (result != ISC_R_SUCCESS)
goto fail1;
} else
rdclass = dns_rdataclass_in;
if (viewtxt == NULL) {
result = dns_viewlist_findzone(&server->viewlist,
dns_fixedname_name(&name),
ISC_TF(classtxt == NULL),
rdclass, zonep);
} else {
result = dns_viewlist_find(&server->viewlist, viewtxt,
rdclass, &view);
if (result != ISC_R_SUCCESS)
goto fail1;
result = dns_zt_find(view->zonetable, dns_fixedname_name(&name),
0, NULL, zonep);
dns_view_detach(&view);
}
/* Partial match? */
if (result != ISC_R_SUCCESS && *zonep != NULL)
dns_zone_detach(zonep);
if (result == DNS_R_PARTIALMATCH)
result = ISC_R_NOTFOUND;
fail1:
return (result);
}
/*
* Act on a "retransfer" command from the command channel.
*/
isc_result_t
ns_server_retransfercommand(ns_server_t *server, char *args) {
isc_result_t result;
dns_zone_t *zone = NULL;
dns_zonetype_t type;
result = zone_from_args(server, args, &zone, NULL);
if (result != ISC_R_SUCCESS)
return (result);
if (zone == NULL)
return (ISC_R_UNEXPECTEDEND);
type = dns_zone_gettype(zone);
if (type == dns_zone_slave || type == dns_zone_stub)
dns_zone_forcereload(zone);
else
result = ISC_R_NOTFOUND;
dns_zone_detach(&zone);
return (result);
}
/*
* Act on a "reload" command from the command channel.
*/
isc_result_t
ns_server_reloadcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
isc_result_t result;
dns_zone_t *zone = NULL;
dns_zonetype_t type;
const char *msg = NULL;
result = zone_from_args(server, args, &zone, NULL);
if (result != ISC_R_SUCCESS)
return (result);
if (zone == NULL) {
result = reload(server);
if (result == ISC_R_SUCCESS)
msg = "server reload successful";
} else {
type = dns_zone_gettype(zone);
if (type == dns_zone_slave || type == dns_zone_stub) {
dns_zone_refresh(zone);
dns_zone_detach(&zone);
msg = "zone refresh queued";
} else {
result = dns_zone_load(zone);
dns_zone_detach(&zone);
switch (result) {
case ISC_R_SUCCESS:
msg = "zone reload successful";
break;
case DNS_R_CONTINUE:
msg = "zone reload queued";
result = ISC_R_SUCCESS;
break;
case DNS_R_UPTODATE:
msg = "zone reload up-to-date";
result = ISC_R_SUCCESS;
break;
default:
/* failure message will be generated by rndc */
break;
}
}
}
if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
isc_buffer_putmem(text, (const unsigned char *)msg,
strlen(msg) + 1);
return (result);
}
/*
* Act on a "reconfig" command from the command channel.
*/
isc_result_t
ns_server_reconfigcommand(ns_server_t *server, char *args) {
UNUSED(args);
reconfig(server);
return (ISC_R_SUCCESS);
}
/*
* Act on a "notify" command from the command channel.
*/
isc_result_t
ns_server_notifycommand(ns_server_t *server, char *args, isc_buffer_t *text) {
isc_result_t result;
dns_zone_t *zone = NULL;
const unsigned char msg[] = "zone notify queued";
result = zone_from_args(server, args, &zone, NULL);
if (result != ISC_R_SUCCESS)
return (result);
if (zone == NULL)
return (ISC_R_UNEXPECTEDEND);
dns_zone_notify(zone);
dns_zone_detach(&zone);
if (sizeof(msg) <= isc_buffer_availablelength(text))
isc_buffer_putmem(text, msg, sizeof(msg));
return (ISC_R_SUCCESS);
}
/*
* Act on a "refresh" command from the command channel.
*/
isc_result_t
ns_server_refreshcommand(ns_server_t *server, char *args, isc_buffer_t *text) {
isc_result_t result;
dns_zone_t *zone = NULL;
const unsigned char msg1[] = "zone refresh queued";
const unsigned char msg2[] = "not a slave or stub zone";
dns_zonetype_t type;
result = zone_from_args(server, args, &zone, NULL);
if (result != ISC_R_SUCCESS)
return (result);
if (zone == NULL)
return (ISC_R_UNEXPECTEDEND);
type = dns_zone_gettype(zone);
if (type == dns_zone_slave || type == dns_zone_stub) {
dns_zone_refresh(zone);
dns_zone_detach(&zone);
if (sizeof(msg1) <= isc_buffer_availablelength(text))
isc_buffer_putmem(text, msg1, sizeof(msg1));
return (ISC_R_SUCCESS);
}
dns_zone_detach(&zone);
if (sizeof(msg2) <= isc_buffer_availablelength(text))
isc_buffer_putmem(text, msg2, sizeof(msg2));
return (ISC_R_FAILURE);
}
isc_result_t
ns_server_togglequerylog(ns_server_t *server) {
server->log_queries = server->log_queries ? ISC_FALSE : ISC_TRUE;
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"query logging is now %s",
server->log_queries ? "on" : "off");
return (ISC_R_SUCCESS);
}
static isc_result_t
ns_listenlist_fromconfig(const cfg_obj_t *listenlist, const cfg_obj_t *config,
cfg_aclconfctx_t *actx,
isc_mem_t *mctx, ns_listenlist_t **target)
{
isc_result_t result;
const cfg_listelt_t *element;
ns_listenlist_t *dlist = NULL;
REQUIRE(target != NULL && *target == NULL);
result = ns_listenlist_create(mctx, &dlist);
if (result != ISC_R_SUCCESS)
return (result);
for (element = cfg_list_first(listenlist);
element != NULL;
element = cfg_list_next(element))
{
ns_listenelt_t *delt = NULL;
const cfg_obj_t *listener = cfg_listelt_value(element);
result = ns_listenelt_fromconfig(listener, config, actx,
mctx, &delt);
if (result != ISC_R_SUCCESS)
goto cleanup;
ISC_LIST_APPEND(dlist->elts, delt, link);
}
*target = dlist;
return (ISC_R_SUCCESS);
cleanup:
ns_listenlist_detach(&dlist);
return (result);
}
/*
* Create a listen list from the corresponding configuration
* data structure.
*/
static isc_result_t
ns_listenelt_fromconfig(const cfg_obj_t *listener, const cfg_obj_t *config,
cfg_aclconfctx_t *actx,
isc_mem_t *mctx, ns_listenelt_t **target)
{
isc_result_t result;
const cfg_obj_t *portobj;
in_port_t port;
ns_listenelt_t *delt = NULL;
REQUIRE(target != NULL && *target == NULL);
portobj = cfg_tuple_get(listener, "port");
if (!cfg_obj_isuint32(portobj)) {
if (ns_g_port != 0) {
port = ns_g_port;
} else {
result = ns_config_getport(config, &port);
if (result != ISC_R_SUCCESS)
return (result);
}
} else {
if (cfg_obj_asuint32(portobj) >= ISC_UINT16_MAX) {
cfg_obj_log(portobj, ns_g_lctx, ISC_LOG_ERROR,
"port value '%u' is out of range",
cfg_obj_asuint32(portobj));
return (ISC_R_RANGE);
}
port = (in_port_t)cfg_obj_asuint32(portobj);
}
result = ns_listenelt_create(mctx, port, NULL, &delt);
if (result != ISC_R_SUCCESS)
return (result);
result = cfg_acl_fromconfig(cfg_tuple_get(listener, "acl"),
config, ns_g_lctx, actx, mctx, 0,
&delt->acl);
if (result != ISC_R_SUCCESS) {
ns_listenelt_destroy(delt);
return (result);
}
*target = delt;
return (ISC_R_SUCCESS);
}
isc_result_t
ns_server_dumpstats(ns_server_t *server) {
isc_result_t result;
FILE *fp = NULL;
CHECKMF(isc_stdio_open(server->statsfile, "a", &fp),
"could not open statistics dump file", server->statsfile);
result = ns_stats_dump(server, fp);
cleanup:
if (fp != NULL)
(void)isc_stdio_close(fp);
if (result == ISC_R_SUCCESS)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpstats complete");
else
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumpstats failed: %s",
dns_result_totext(result));
return (result);
}
static isc_result_t
add_zone_tolist(dns_zone_t *zone, void *uap) {
struct dumpcontext *dctx = uap;
struct zonelistentry *zle;
zle = isc_mem_get(dctx->mctx, sizeof *zle);
if (zle == NULL)
return (ISC_R_NOMEMORY);
zle->zone = NULL;
dns_zone_attach(zone, &zle->zone);
ISC_LINK_INIT(zle, link);
ISC_LIST_APPEND(ISC_LIST_TAIL(dctx->viewlist)->zonelist, zle, link);
return (ISC_R_SUCCESS);
}
static isc_result_t
add_view_tolist(struct dumpcontext *dctx, dns_view_t *view) {
struct viewlistentry *vle;
isc_result_t result = ISC_R_SUCCESS;
/*
* Prevent duplicate views.
*/
for (vle = ISC_LIST_HEAD(dctx->viewlist);
vle != NULL;
vle = ISC_LIST_NEXT(vle, link))
if (vle->view == view)
return (ISC_R_SUCCESS);
vle = isc_mem_get(dctx->mctx, sizeof *vle);
if (vle == NULL)
return (ISC_R_NOMEMORY);
vle->view = NULL;
dns_view_attach(view, &vle->view);
ISC_LINK_INIT(vle, link);
ISC_LIST_INIT(vle->zonelist);
ISC_LIST_APPEND(dctx->viewlist, vle, link);
if (dctx->dumpzones)
result = dns_zt_apply(view->zonetable, ISC_TRUE,
add_zone_tolist, dctx);
return (result);
}
static void
dumpcontext_destroy(struct dumpcontext *dctx) {
struct viewlistentry *vle;
struct zonelistentry *zle;
vle = ISC_LIST_HEAD(dctx->viewlist);
while (vle != NULL) {
ISC_LIST_UNLINK(dctx->viewlist, vle, link);
zle = ISC_LIST_HEAD(vle->zonelist);
while (zle != NULL) {
ISC_LIST_UNLINK(vle->zonelist, zle, link);
dns_zone_detach(&zle->zone);
isc_mem_put(dctx->mctx, zle, sizeof *zle);
zle = ISC_LIST_HEAD(vle->zonelist);
}
dns_view_detach(&vle->view);
isc_mem_put(dctx->mctx, vle, sizeof *vle);
vle = ISC_LIST_HEAD(dctx->viewlist);
}
if (dctx->version != NULL)
dns_db_closeversion(dctx->db, &dctx->version, ISC_FALSE);
if (dctx->db != NULL)
dns_db_detach(&dctx->db);
if (dctx->cache != NULL)
dns_db_detach(&dctx->cache);
if (dctx->task != NULL)
isc_task_detach(&dctx->task);
if (dctx->fp != NULL)
(void)isc_stdio_close(dctx->fp);
if (dctx->mdctx != NULL)
dns_dumpctx_detach(&dctx->mdctx);
isc_mem_put(dctx->mctx, dctx, sizeof *dctx);
}
static void
dumpdone(void *arg, isc_result_t result) {
struct dumpcontext *dctx = arg;
char buf[1024+32];
const dns_master_style_t *style;
if (result != ISC_R_SUCCESS)
goto cleanup;
if (dctx->mdctx != NULL)
dns_dumpctx_detach(&dctx->mdctx);
if (dctx->view == NULL) {
dctx->view = ISC_LIST_HEAD(dctx->viewlist);
if (dctx->view == NULL)
goto done;
INSIST(dctx->zone == NULL);
} else
goto resume;
nextview:
fprintf(dctx->fp, ";\n; Start view %s\n;\n", dctx->view->view->name);
resume:
if (dctx->dumpcache && dns_view_iscacheshared(dctx->view->view)) {
fprintf(dctx->fp,
";\n; Cache of view '%s' is shared as '%s'\n",
dctx->view->view->name,
dns_cache_getname(dctx->view->view->cache));
} else if (dctx->zone == NULL && dctx->cache == NULL &&
dctx->dumpcache)
{
style = &dns_master_style_cache;
/* start cache dump */
if (dctx->view->view->cachedb != NULL)
dns_db_attach(dctx->view->view->cachedb, &dctx->cache);
if (dctx->cache != NULL) {
fprintf(dctx->fp,
";\n; Cache dump of view '%s' (cache %s)\n;\n",
dctx->view->view->name,
dns_cache_getname(dctx->view->view->cache));
result = dns_master_dumptostreaminc(dctx->mctx,
dctx->cache, NULL,
style, dctx->fp,
dctx->task,
dumpdone, dctx,
&dctx->mdctx);
if (result == DNS_R_CONTINUE)
return;
if (result == ISC_R_NOTIMPLEMENTED)
fprintf(dctx->fp, "; %s\n",
dns_result_totext(result));
else if (result != ISC_R_SUCCESS)
goto cleanup;
}
}
if (dctx->cache != NULL) {
dns_adb_dump(dctx->view->view->adb, dctx->fp);
dns_resolver_printbadcache(dctx->view->view->resolver,
dctx->fp);
dns_db_detach(&dctx->cache);
}
if (dctx->dumpzones) {
style = &dns_master_style_full;
nextzone:
if (dctx->version != NULL)
dns_db_closeversion(dctx->db, &dctx->version,
ISC_FALSE);
if (dctx->db != NULL)
dns_db_detach(&dctx->db);
if (dctx->zone == NULL)
dctx->zone = ISC_LIST_HEAD(dctx->view->zonelist);
else
dctx->zone = ISC_LIST_NEXT(dctx->zone, link);
if (dctx->zone != NULL) {
/* start zone dump */
dns_zone_name(dctx->zone->zone, buf, sizeof(buf));
fprintf(dctx->fp, ";\n; Zone dump of '%s'\n;\n", buf);
result = dns_zone_getdb(dctx->zone->zone, &dctx->db);
if (result != ISC_R_SUCCESS) {
fprintf(dctx->fp, "; %s\n",
dns_result_totext(result));
goto nextzone;
}
dns_db_currentversion(dctx->db, &dctx->version);
result = dns_master_dumptostreaminc(dctx->mctx,
dctx->db,
dctx->version,
style, dctx->fp,
dctx->task,
dumpdone, dctx,
&dctx->mdctx);
if (result == DNS_R_CONTINUE)
return;
if (result == ISC_R_NOTIMPLEMENTED) {
fprintf(dctx->fp, "; %s\n",
dns_result_totext(result));
result = ISC_R_SUCCESS;
POST(result);
goto nextzone;
}
if (result != ISC_R_SUCCESS)
goto cleanup;
}
}
if (dctx->view != NULL)
dctx->view = ISC_LIST_NEXT(dctx->view, link);
if (dctx->view != NULL)
goto nextview;
done:
fprintf(dctx->fp, "; Dump complete\n");
result = isc_stdio_flush(dctx->fp);
if (result == ISC_R_SUCCESS)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpdb complete");
cleanup:
if (result != ISC_R_SUCCESS)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumpdb failed: %s", dns_result_totext(result));
dumpcontext_destroy(dctx);
}
isc_result_t
ns_server_dumpdb(ns_server_t *server, char *args) {
struct dumpcontext *dctx = NULL;
dns_view_t *view;
isc_result_t result;
char *ptr;
const char *sep;
/* Skip the command name. */
ptr = next_token(&args, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
dctx = isc_mem_get(server->mctx, sizeof(*dctx));
if (dctx == NULL)
return (ISC_R_NOMEMORY);
dctx->mctx = server->mctx;
dctx->dumpcache = ISC_TRUE;
dctx->dumpzones = ISC_FALSE;
dctx->fp = NULL;
ISC_LIST_INIT(dctx->viewlist);
dctx->view = NULL;
dctx->zone = NULL;
dctx->cache = NULL;
dctx->mdctx = NULL;
dctx->db = NULL;
dctx->cache = NULL;
dctx->task = NULL;
dctx->version = NULL;
isc_task_attach(server->task, &dctx->task);
CHECKMF(isc_stdio_open(server->dumpfile, "w", &dctx->fp),
"could not open dump file", server->dumpfile);
sep = (args == NULL) ? "" : ": ";
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpdb started%s%s", sep, (args != NULL) ? args : "");
ptr = next_token(&args, " \t");
if (ptr != NULL && strcmp(ptr, "-all") == 0) {
dctx->dumpzones = ISC_TRUE;
dctx->dumpcache = ISC_TRUE;
ptr = next_token(&args, " \t");
} else if (ptr != NULL && strcmp(ptr, "-cache") == 0) {
dctx->dumpzones = ISC_FALSE;
dctx->dumpcache = ISC_TRUE;
ptr = next_token(&args, " \t");
} else if (ptr != NULL && strcmp(ptr, "-zones") == 0) {
dctx->dumpzones = ISC_TRUE;
dctx->dumpcache = ISC_FALSE;
ptr = next_token(&args, " \t");
}
nextview:
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (ptr != NULL && strcmp(view->name, ptr) != 0)
continue;
CHECK(add_view_tolist(dctx, view));
}
if (ptr != NULL) {
ptr = next_token(&args, " \t");
if (ptr != NULL)
goto nextview;
}
dumpdone(dctx, ISC_R_SUCCESS);
return (ISC_R_SUCCESS);
cleanup:
if (dctx != NULL)
dumpcontext_destroy(dctx);
return (result);
}
isc_result_t
ns_server_dumpsecroots(ns_server_t *server, char *args) {
dns_view_t *view;
dns_keytable_t *secroots = NULL;
isc_result_t result;
char *ptr;
FILE *fp = NULL;
isc_time_t now;
char tbuf[64];
/* Skip the command name. */
ptr = next_token(&args, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
ptr = next_token(&args, " \t");
CHECKMF(isc_stdio_open(server->secrootsfile, "w", &fp),
"could not open secroots dump file", server->secrootsfile);
TIME_NOW(&now);
isc_time_formattimestamp(&now, tbuf, sizeof(tbuf));
fprintf(fp, "%s\n", tbuf);
do {
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (ptr != NULL && strcmp(view->name, ptr) != 0)
continue;
if (secroots != NULL)
dns_keytable_detach(&secroots);
result = dns_view_getsecroots(view, &secroots);
if (result == ISC_R_NOTFOUND) {
result = ISC_R_SUCCESS;
continue;
}
fprintf(fp, "\n Start view %s\n\n", view->name);
result = dns_keytable_dump(secroots, fp);
if (result != ISC_R_SUCCESS)
fprintf(fp, " dumpsecroots failed: %s\n",
isc_result_totext(result));
}
if (ptr != NULL)
ptr = next_token(&args, " \t");
} while (ptr != NULL);
cleanup:
if (secroots != NULL)
dns_keytable_detach(&secroots);
if (fp != NULL)
(void)isc_stdio_close(fp);
if (result == ISC_R_SUCCESS)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumpsecroots complete");
else
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumpsecroots failed: %s",
dns_result_totext(result));
return (result);
}
isc_result_t
ns_server_dumprecursing(ns_server_t *server) {
FILE *fp = NULL;
isc_result_t result;
CHECKMF(isc_stdio_open(server->recfile, "w", &fp),
"could not open dump file", server->recfile);
fprintf(fp,";\n; Recursing Queries\n;\n");
ns_interfacemgr_dumprecursing(fp, server->interfacemgr);
fprintf(fp, "; Dump complete\n");
cleanup:
if (fp != NULL)
result = isc_stdio_close(fp);
if (result == ISC_R_SUCCESS)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"dumprecursing complete");
else
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"dumprecursing failed: %s",
dns_result_totext(result));
return (result);
}
isc_result_t
ns_server_setdebuglevel(ns_server_t *server, char *args) {
char *ptr;
char *levelstr;
char *endp;
long newlevel;
UNUSED(server);
/* Skip the command name. */
ptr = next_token(&args, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
/* Look for the new level name. */
levelstr = next_token(&args, " \t");
if (levelstr == NULL) {
if (ns_g_debuglevel < 99)
ns_g_debuglevel++;
} else {
newlevel = strtol(levelstr, &endp, 10);
if (*endp != '\0' || newlevel < 0 || newlevel > 99)
return (ISC_R_RANGE);
ns_g_debuglevel = (unsigned int)newlevel;
}
isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"debug level is now %d", ns_g_debuglevel);
return (ISC_R_SUCCESS);
}
isc_result_t
ns_server_validation(ns_server_t *server, char *args) {
char *ptr, *viewname;
dns_view_t *view;
isc_boolean_t changed = ISC_FALSE;
isc_result_t result;
isc_boolean_t enable;
/* Skip the command name. */
ptr = next_token(&args, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
/* Find out what we are to do. */
ptr = next_token(&args, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
if (!strcasecmp(ptr, "on") || !strcasecmp(ptr, "yes") ||
!strcasecmp(ptr, "enable") || !strcasecmp(ptr, "true"))
enable = ISC_TRUE;
else if (!strcasecmp(ptr, "off") || !strcasecmp(ptr, "no") ||
!strcasecmp(ptr, "disable") || !strcasecmp(ptr, "false"))
enable = ISC_FALSE;
else
return (DNS_R_SYNTAX);
/* Look for the view name. */
viewname = next_token(&args, " \t");
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
continue;
result = dns_view_flushcache(view);
if (result != ISC_R_SUCCESS)
goto out;
view->enablevalidation = enable;
changed = ISC_TRUE;
}
if (changed)
result = ISC_R_SUCCESS;
else
result = ISC_R_FAILURE;
out:
isc_task_endexclusive(server->task);
return (result);
}
isc_result_t
ns_server_flushcache(ns_server_t *server, char *args) {
char *ptr, *viewname;
dns_view_t *view;
isc_boolean_t flushed;
isc_boolean_t found;
isc_result_t result;
ns_cache_t *nsc;
/* Skip the command name. */
ptr = next_token(&args, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
/* Look for the view name. */
viewname = next_token(&args, " \t");
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
flushed = ISC_TRUE;
found = ISC_FALSE;
/*
* Flushing a cache is tricky when caches are shared by multiple views.
* We first identify which caches should be flushed in the local cache
* list, flush these caches, and then update other views that refer to
* the flushed cache DB.
*/
if (viewname != NULL) {
/*
* Mark caches that need to be flushed. This is an O(#view^2)
* operation in the very worst case, but should be normally
* much more lightweight because only a few (most typically just
* one) views will match.
*/
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (strcasecmp(viewname, view->name) != 0)
continue;
found = ISC_TRUE;
for (nsc = ISC_LIST_HEAD(server->cachelist);
nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link)) {
if (nsc->cache == view->cache)
break;
}
INSIST(nsc != NULL);
nsc->needflush = ISC_TRUE;
}
} else
found = ISC_TRUE;
/* Perform flush */
for (nsc = ISC_LIST_HEAD(server->cachelist);
nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link)) {
if (viewname != NULL && !nsc->needflush)
continue;
nsc->needflush = ISC_TRUE;
result = dns_view_flushcache2(nsc->primaryview, ISC_FALSE);
if (result != ISC_R_SUCCESS) {
flushed = ISC_FALSE;
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing cache in view '%s' failed: %s",
nsc->primaryview->name,
isc_result_totext(result));
}
}
/*
* Fix up views that share a flushed cache: let the views update the
* cache DB they're referring to. This could also be an expensive
* operation, but should typically be marginal: the inner loop is only
* necessary for views that share a cache, and if there are many such
* views the number of shared cache should normally be small.
* A worst case is that we have n views and n/2 caches, each shared by
* two views. Then this will be a O(n^2/4) operation.
*/
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (!dns_view_iscacheshared(view))
continue;
for (nsc = ISC_LIST_HEAD(server->cachelist);
nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link)) {
if (!nsc->needflush || nsc->cache != view->cache)
continue;
result = dns_view_flushcache2(view, ISC_TRUE);
if (result != ISC_R_SUCCESS) {
flushed = ISC_FALSE;
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"fixing cache in view '%s' "
"failed: %s", view->name,
isc_result_totext(result));
}
}
}
/* Cleanup the cache list. */
for (nsc = ISC_LIST_HEAD(server->cachelist);
nsc != NULL;
nsc = ISC_LIST_NEXT(nsc, link)) {
nsc->needflush = ISC_FALSE;
}
if (flushed && found) {
if (viewname != NULL)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing cache in view '%s' succeeded",
viewname);
else
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing caches in all views succeeded");
result = ISC_R_SUCCESS;
} else {
if (!found) {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing cache in view '%s' failed: "
"view not found", viewname);
result = ISC_R_NOTFOUND;
} else
result = ISC_R_FAILURE;
}
isc_task_endexclusive(server->task);
return (result);
}
isc_result_t
ns_server_flushname(ns_server_t *server, char *args) {
char *ptr, *target, *viewname;
dns_view_t *view;
isc_boolean_t flushed;
isc_boolean_t found;
isc_result_t result;
isc_buffer_t b;
dns_fixedname_t fixed;
dns_name_t *name;
/* Skip the command name. */
ptr = next_token(&args, " \t");
if (ptr == NULL)
return (ISC_R_UNEXPECTEDEND);
/* Find the domain name to flush. */
target = next_token(&args, " \t");
if (target == NULL)
return (ISC_R_UNEXPECTEDEND);
isc_buffer_init(&b, target, strlen(target));
isc_buffer_add(&b, strlen(target));
dns_fixedname_init(&fixed);
name = dns_fixedname_name(&fixed);
result = dns_name_fromtext(name, &b, dns_rootname, 0, NULL);
if (result != ISC_R_SUCCESS)
return (result);
/* Look for the view name. */
viewname = next_token(&args, " \t");
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
flushed = ISC_TRUE;
found = ISC_FALSE;
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link))
{
if (viewname != NULL && strcasecmp(viewname, view->name) != 0)
continue;
found = ISC_TRUE;
/*
* It's a little inefficient to try flushing name for all views
* if some of the views share a single cache. But since the
* operation is lightweight we prefer simplicity here.
*/
result = dns_view_flushname(view, name);
if (result != ISC_R_SUCCESS) {
flushed = ISC_FALSE;
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing name '%s' in cache view '%s' "
"failed: %s", target, view->name,
isc_result_totext(result));
}
}
if (flushed && found) {
if (viewname != NULL)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing name '%s' in cache view '%s' "
"succeeded", target, viewname);
else
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"flushing name '%s' in all cache views "
"succeeded", target);
result = ISC_R_SUCCESS;
} else {
if (!found)
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
"flushing name '%s' in cache view '%s' "
"failed: view not found", target,
viewname);
result = ISC_R_FAILURE;
}
isc_task_endexclusive(server->task);
return (result);
}
isc_result_t
ns_server_status(ns_server_t *server, isc_buffer_t *text) {
int zonecount, xferrunning, xferdeferred, soaqueries;
unsigned int n;
const char *ob = "", *cb = "", *alt = "";
if (ns_g_server->version_set) {
ob = " (";
cb = ")";
if (ns_g_server->version == NULL)
alt = "version.bind/txt/ch disabled";
else
alt = ns_g_server->version;
}
zonecount = dns_zonemgr_getcount(server->zonemgr, DNS_ZONESTATE_ANY);
xferrunning = dns_zonemgr_getcount(server->zonemgr,
DNS_ZONESTATE_XFERRUNNING);
xferdeferred = dns_zonemgr_getcount(server->zonemgr,
DNS_ZONESTATE_XFERDEFERRED);
soaqueries = dns_zonemgr_getcount(server->zonemgr,
DNS_ZONESTATE_SOAQUERY);
n = snprintf((char *)isc_buffer_used(text),
isc_buffer_availablelength(text),
"version: %s%s%s%s\n"
#ifdef ISC_PLATFORM_USETHREADS
"CPUs found: %u\n"
"worker threads: %u\n"
#endif
"number of zones: %u\n"
"debug level: %d\n"
"xfers running: %u\n"
"xfers deferred: %u\n"
"soa queries in progress: %u\n"
"query logging is %s\n"
"recursive clients: %d/%d/%d\n"
"tcp clients: %d/%d\n"
"server is up and running",
ns_g_version, ob, alt, cb,
#ifdef ISC_PLATFORM_USETHREADS
ns_g_cpus_detected, ns_g_cpus,
#endif
zonecount, ns_g_debuglevel, xferrunning, xferdeferred,
soaqueries, server->log_queries ? "ON" : "OFF",
server->recursionquota.used, server->recursionquota.soft,
server->recursionquota.max,
server->tcpquota.used, server->tcpquota.max);
if (n >= isc_buffer_availablelength(text))
return (ISC_R_NOSPACE);
isc_buffer_add(text, n);
return (ISC_R_SUCCESS);
}
static isc_result_t
delete_keynames(dns_tsig_keyring_t *ring, char *target,
unsigned int *foundkeys)
{
char namestr[DNS_NAME_FORMATSIZE];
isc_result_t result;
dns_rbtnodechain_t chain;
dns_name_t foundname;
dns_fixedname_t fixedorigin;
dns_name_t *origin;
dns_rbtnode_t *node;
dns_tsigkey_t *tkey;
dns_name_init(&foundname, NULL);
dns_fixedname_init(&fixedorigin);
origin = dns_fixedname_name(&fixedorigin);
again:
dns_rbtnodechain_init(&chain, ring->mctx);
result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
origin);
if (result == ISC_R_NOTFOUND) {
dns_rbtnodechain_invalidate(&chain);
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
dns_rbtnodechain_invalidate(&chain);
return (result);
}
for (;;) {
node = NULL;
dns_rbtnodechain_current(&chain, &foundname, origin, &node);
tkey = node->data;
if (tkey != NULL) {
if (!tkey->generated)
goto nextkey;
dns_name_format(&tkey->name, namestr, sizeof(namestr));
if (strcmp(namestr, target) == 0) {
(*foundkeys)++;
dns_rbtnodechain_invalidate(&chain);
(void)dns_rbt_deletename(ring->keys,
&tkey->name,
ISC_FALSE);
goto again;
}
}
nextkey:
result = dns_rbtnodechain_next(&chain, &foundname, origin);
if (result == ISC_R_NOMORE)
break;
if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
dns_rbtnodechain_invalidate(&chain);
return (result);
}
}
return (ISC_R_SUCCESS);
}
isc_result_t
ns_server_tsigdelete(ns_server_t *server, char *command, isc_buffer_t *text) {
isc_result_t result;
unsigned int n;
dns_view_t *view;
unsigned int foundkeys = 0;
char *target;
char *viewname;
(void)next_token(&command, " \t"); /* skip command name */
target = next_token(&command, " \t");
if (target == NULL)
return (ISC_R_UNEXPECTEDEND);
viewname = next_token(&command, " \t");
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link)) {
if (viewname == NULL || strcmp(view->name, viewname) == 0) {
RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_write);
result = delete_keynames(view->dynamickeys, target,
&foundkeys);
RWUNLOCK(&view->dynamickeys->lock,
isc_rwlocktype_write);
if (result != ISC_R_SUCCESS) {
isc_task_endexclusive(server->task);
return (result);
}
}
}
isc_task_endexclusive(server->task);
n = snprintf((char *)isc_buffer_used(text),
isc_buffer_availablelength(text),
"%d tsig keys deleted.\n", foundkeys);
if (n >= isc_buffer_availablelength(text))
return (ISC_R_NOSPACE);
isc_buffer_add(text, n);
return (ISC_R_SUCCESS);
}
static isc_result_t
list_keynames(dns_view_t *view, dns_tsig_keyring_t *ring, isc_buffer_t *text,
unsigned int *foundkeys)
{
char namestr[DNS_NAME_FORMATSIZE];
char creatorstr[DNS_NAME_FORMATSIZE];
isc_result_t result;
dns_rbtnodechain_t chain;
dns_name_t foundname;
dns_fixedname_t fixedorigin;
dns_name_t *origin;
dns_rbtnode_t *node;
dns_tsigkey_t *tkey;
unsigned int n;
const char *viewname;
if (view != NULL)
viewname = view->name;
else
viewname = "(global)";
dns_name_init(&foundname, NULL);
dns_fixedname_init(&fixedorigin);
origin = dns_fixedname_name(&fixedorigin);
dns_rbtnodechain_init(&chain, ring->mctx);
result = dns_rbtnodechain_first(&chain, ring->keys, &foundname,
origin);
if (result == ISC_R_NOTFOUND) {
dns_rbtnodechain_invalidate(&chain);
return (ISC_R_SUCCESS);
}
if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
dns_rbtnodechain_invalidate(&chain);
return (result);
}
for (;;) {
node = NULL;
dns_rbtnodechain_current(&chain, &foundname, origin, &node);
tkey = node->data;
if (tkey != NULL) {
(*foundkeys)++;
dns_name_format(&tkey->name, namestr, sizeof(namestr));
if (tkey->generated) {
dns_name_format(tkey->creator, creatorstr,
sizeof(creatorstr));
n = snprintf((char *)isc_buffer_used(text),
isc_buffer_availablelength(text),
"view \"%s\"; type \"dynamic\"; key \"%s\"; creator \"%s\";\n",
viewname, namestr, creatorstr);
} else {
n = snprintf((char *)isc_buffer_used(text),
isc_buffer_availablelength(text),
"view \"%s\"; type \"static\"; key \"%s\";\n",
viewname, namestr);
}
if (n >= isc_buffer_availablelength(text)) {
dns_rbtnodechain_invalidate(&chain);
return (ISC_R_NOSPACE);
}
isc_buffer_add(text, n);
}
result = dns_rbtnodechain_next(&chain, &foundname, origin);
if (result == ISC_R_NOMORE)
break;
if (result != ISC_R_SUCCESS && result != DNS_R_NEWORIGIN) {
dns_rbtnodechain_invalidate(&chain);
return (result);
}
}
return (ISC_R_SUCCESS);
}
isc_result_t
ns_server_tsiglist(ns_server_t *server, isc_buffer_t *text) {
isc_result_t result;
unsigned int n;
dns_view_t *view;
unsigned int foundkeys = 0;
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link)) {
RWLOCK(&view->statickeys->lock, isc_rwlocktype_read);
result = list_keynames(view, view->statickeys, text,
&foundkeys);
RWUNLOCK(&view->statickeys->lock, isc_rwlocktype_read);
if (result != ISC_R_SUCCESS) {
isc_task_endexclusive(server->task);
return (result);
}
RWLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
result = list_keynames(view, view->dynamickeys, text,
&foundkeys);
RWUNLOCK(&view->dynamickeys->lock, isc_rwlocktype_read);
if (result != ISC_R_SUCCESS) {
isc_task_endexclusive(server->task);
return (result);
}
}
isc_task_endexclusive(server->task);
if (foundkeys == 0) {
n = snprintf((char *)isc_buffer_used(text),
isc_buffer_availablelength(text),
"no tsig keys found.\n");
if (n >= isc_buffer_availablelength(text))
return (ISC_R_NOSPACE);
isc_buffer_add(text, n);
}
return (ISC_R_SUCCESS);
}
/*
* Act on a "sign" or "loadkeys" command from the command channel.
*/
isc_result_t
ns_server_rekey(ns_server_t *server, char *args) {
isc_result_t result;
dns_zone_t *zone = NULL;
dns_zonetype_t type;
isc_uint16_t keyopts;
isc_boolean_t fullsign = ISC_FALSE;
if (strncasecmp(args, NS_COMMAND_SIGN, strlen(NS_COMMAND_SIGN)) == 0)
fullsign = ISC_TRUE;
result = zone_from_args(server, args, &zone, NULL);
if (result != ISC_R_SUCCESS)
return (result);
if (zone == NULL)
return (ISC_R_UNEXPECTEDEND); /* XXX: or do all zones? */
type = dns_zone_gettype(zone);
if (type != dns_zone_master) {
dns_zone_detach(&zone);
return (DNS_R_NOTMASTER);
}
keyopts = dns_zone_getkeyopts(zone);
/* "rndc loadkeys" requires "auto-dnssec maintain". */
if ((keyopts & DNS_ZONEKEY_ALLOW) == 0)
result = ISC_R_NOPERM;
else if ((keyopts & DNS_ZONEKEY_MAINTAIN) == 0 && !fullsign)
result = ISC_R_NOPERM;
else
dns_zone_rekey(zone, fullsign);
dns_zone_detach(&zone);
return (result);
}
/*
* Act on a "freeze" or "thaw" command from the command channel.
*/
isc_result_t
ns_server_freeze(ns_server_t *server, isc_boolean_t freeze, char *args,
isc_buffer_t *text)
{
isc_result_t result, tresult;
dns_zone_t *zone = NULL;
dns_zonetype_t type;
char classstr[DNS_RDATACLASS_FORMATSIZE];
char zonename[DNS_NAME_FORMATSIZE];
dns_view_t *view;
char *journal;
const char *vname, *sep;
isc_boolean_t frozen;
const char *msg = NULL;
result = zone_from_args(server, args, &zone, NULL);
if (result != ISC_R_SUCCESS)
return (result);
if (zone == NULL) {
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
tresult = ISC_R_SUCCESS;
for (view = ISC_LIST_HEAD(server->viewlist);
view != NULL;
view = ISC_LIST_NEXT(view, link)) {
result = dns_view_freezezones(view, freeze);
if (result != ISC_R_SUCCESS &&
tresult == ISC_R_SUCCESS)
tresult = result;
}
isc_task_endexclusive(server->task);
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"%s all zones: %s",
freeze ? "freezing" : "thawing",
isc_result_totext(tresult));
return (tresult);
}
type = dns_zone_gettype(zone);
if (type != dns_zone_master) {
dns_zone_detach(&zone);
return (DNS_R_NOTMASTER);
}
result = isc_task_beginexclusive(server->task);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
frozen = dns_zone_getupdatedisabled(zone);
if (freeze) {
if (frozen) {
msg = "WARNING: The zone was already frozen.\n"
"Someone else may be editing it or "
"it may still be re-loading.";
result = DNS_R_FROZEN;
}
if (result == ISC_R_SUCCESS) {
result = dns_zone_flush(zone);
if (result != ISC_R_SUCCESS)
msg = "Flushing the zone updates to "
"disk failed.";
}
if (result == ISC_R_SUCCESS) {
journal = dns_zone_getjournal(zone);
if (journal != NULL)
(void)isc_file_remove(journal);
}
if (result == ISC_R_SUCCESS)
dns_zone_setupdatedisabled(zone, freeze);
} else {
if (frozen) {
result = dns_zone_loadandthaw(zone);
switch (result) {
case ISC_R_SUCCESS:
case DNS_R_UPTODATE:
msg = "The zone reload and thaw was "
"successful.";
result = ISC_R_SUCCESS;
break;
case DNS_R_CONTINUE:
msg = "A zone reload and thaw was started.\n"
"Check the logs to see the result.";
result = ISC_R_SUCCESS;
break;
}
}
}
isc_task_endexclusive(server->task);
if (msg != NULL && strlen(msg) < isc_buffer_availablelength(text))
isc_buffer_putmem(text, (const unsigned char *)msg,
strlen(msg) + 1);
view = dns_zone_getview(zone);
if (strcmp(view->name, "_default") == 0 ||
strcmp(view->name, "_bind") == 0)
{
vname = "";
sep = "";
} else {
vname = view->name;
sep = " ";
}
dns_rdataclass_format(dns_zone_getclass(zone), classstr,
sizeof(classstr));
dns_name_format(dns_zone_getorigin(zone),
zonename, sizeof(zonename));
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"%s zone '%s/%s'%s%s: %s",
freeze ? "freezing" : "thawing",
zonename, classstr, sep, vname,
isc_result_totext(result));
dns_zone_detach(&zone);
return (result);
}
#ifdef HAVE_LIBSCF
/*
* This function adds a message for rndc to echo if named
* is managed by smf and is also running chroot.
*/
isc_result_t
ns_smf_add_message(isc_buffer_t *text) {
unsigned int n;
n = snprintf((char *)isc_buffer_used(text),
isc_buffer_availablelength(text),
"use svcadm(1M) to manage named");
if (n >= isc_buffer_availablelength(text))
return (ISC_R_NOSPACE);
isc_buffer_add(text, n);
return (ISC_R_SUCCESS);
}
#endif /* HAVE_LIBSCF */
/*
* Act on an "addzone" command from the command channel.
*/
isc_result_t
ns_server_add_zone(ns_server_t *server, char *args) {
isc_result_t result;
isc_buffer_t argbuf;
size_t arglen;
cfg_parser_t *parser = NULL;
cfg_obj_t *config = NULL;
const cfg_obj_t *vconfig = NULL;
const cfg_obj_t *views = NULL;
const cfg_obj_t *parms = NULL;
const cfg_obj_t *obj = NULL;
const cfg_listelt_t *element;
const char *zonename;
const char *classname = NULL;
const char *argp;
const char *viewname = NULL;
dns_rdataclass_t rdclass;
dns_view_t *view = 0;
isc_buffer_t buf, *nbuf = NULL;
dns_name_t dnsname;
dns_zone_t *zone = NULL;
FILE *fp = NULL;
struct cfg_context *cfg = NULL;
/* Try to parse the argument string */
arglen = strlen(args);
isc_buffer_init(&argbuf, args, arglen);
isc_buffer_add(&argbuf, strlen(args));
CHECK(cfg_parser_create(server->mctx, ns_g_lctx, &parser));
CHECK(cfg_parse_buffer(parser, &argbuf, &cfg_type_addzoneconf,
&config));
CHECK(cfg_map_get(config, "addzone", &parms));
zonename = cfg_obj_asstring(cfg_tuple_get(parms, "name"));
isc_buffer_init(&buf, zonename, strlen(zonename));
isc_buffer_add(&buf, strlen(zonename));
dns_name_init(&dnsname, NULL);
isc_buffer_allocate(server->mctx, &nbuf, 256);
dns_name_setbuffer(&dnsname, nbuf);
CHECK(dns_name_fromtext(&dnsname, &buf, dns_rootname, ISC_FALSE, NULL));
/* Make sense of optional class argument */
obj = cfg_tuple_get(parms, "class");
CHECK(ns_config_getclass(obj, dns_rdataclass_in, &rdclass));
if (rdclass != dns_rdataclass_in && obj)
classname = cfg_obj_asstring(obj);
/* Make sense of optional view argument */
obj = cfg_tuple_get(parms, "view");
if (obj && cfg_obj_isstring(obj))
viewname = cfg_obj_asstring(obj);
if (viewname == NULL || *viewname == '\0')
viewname = "_default";
CHECK(dns_viewlist_find(&server->viewlist, viewname, rdclass, &view));
/* Are we accepting new zones? */
if (view->new_zone_file == NULL) {
result = ISC_R_NOPERM;
goto cleanup;
}
cfg = (struct cfg_context *) view->new_zone_config;
if (cfg == NULL) {
result = ISC_R_FAILURE;
goto cleanup;
}
/* Zone shouldn't already exist */
result = dns_zt_find(view->zonetable, &dnsname, 0, NULL, &zone);
if (result == ISC_R_SUCCESS) {
result = ISC_R_EXISTS;
goto cleanup;
} else if (result == DNS_R_PARTIALMATCH) {
/* Create our sub-zone anyway */
dns_zone_detach(&zone);
zone = NULL;
}
else if (result != ISC_R_NOTFOUND)
goto cleanup;
/* Find the view statement */
cfg_map_get(cfg->config, "view", &views);
for (element = cfg_list_first(views);
element != NULL;
element = cfg_list_next(element))
{
const char *vname;
vconfig = cfg_listelt_value(element);
vname = cfg_obj_asstring(cfg_tuple_get(vconfig, "name"));
if (vname && !strcasecmp(vname, viewname))
break;
vconfig = NULL;
}
/* Open save file for write configuration */
CHECK(isc_stdio_open(view->new_zone_file, "a", &fp));
/* Mark view unfrozen so that zone can be added */
dns_view_thaw(view);
result = configure_zone(cfg->config, parms, vconfig,
server->mctx, view, cfg->actx, ISC_FALSE);
dns_view_freeze(view);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
/* Is it there yet? */
CHECK(dns_zt_find(view->zonetable, &dnsname, 0, NULL, &zone));
/*
* Load the zone from the master file. If this fails, we'll
* need to undo the configuration we've done already.
*/
result = dns_zone_loadnew(zone);
if (result != ISC_R_SUCCESS) {
dns_db_t *dbp = NULL;
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"addzone failed; reverting.");
/* If the zone loaded partially, unload it */
if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(zone);
}
/* Remove the zone from the zone table */
dns_zt_unmount(view->zonetable, zone);
goto cleanup;
}
/* Flag the zone as having been added at runtime */
dns_zone_setadded(zone, ISC_TRUE);
/* Emit just the zone name from args */
CHECK(isc_stdio_write("zone ", 5, 1, fp, NULL));
CHECK(isc_stdio_write(zonename, strlen(zonename), 1, fp, NULL));
CHECK(isc_stdio_write(" ", 1, 1, fp, NULL));
/* Classname, if not default */
if (classname != NULL && *classname != '\0') {
CHECK(isc_stdio_write(classname, strlen(classname), 1, fp,
NULL));
CHECK(isc_stdio_write(" ", 1, 1, fp, NULL));
}
/* Find beginning of option block from args */
for (argp = args; *argp; argp++, arglen--) {
if (*argp == '{') { /* Assume matching '}' */
/* Add that to our file */
CHECK(isc_stdio_write(argp, arglen, 1, fp, NULL));
/* Make sure we end with a LF */
if (argp[arglen-1] != '\n') {
CHECK(isc_stdio_write("\n", 1, 1, fp, NULL));
}
break;
}
}
CHECK(isc_stdio_close(fp));
fp = NULL;
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"zone %s added to view %s via addzone",
zonename, viewname);
result = ISC_R_SUCCESS;
cleanup:
if (fp != NULL)
isc_stdio_close(fp);
if (parser != NULL) {
if (config != NULL)
cfg_obj_destroy(parser, &config);
cfg_parser_destroy(&parser);
}
if (zone != NULL)
dns_zone_detach(&zone);
if (view != NULL)
dns_view_detach(&view);
if (nbuf != NULL)
isc_buffer_free(&nbuf);
return (result);
}
/*
* Act on a "delzone" command from the command channel.
*/
isc_result_t
ns_server_del_zone(ns_server_t *server, char *args) {
isc_result_t result;
dns_zone_t *zone = NULL;
dns_view_t *view = NULL;
dns_db_t *dbp = NULL;
const char *filename = NULL;
char *tmpname = NULL;
char buf[1024];
const char *zonename = NULL;
size_t znamelen = 0;
FILE *ifp = NULL, *ofp = NULL;
/* Parse parameters */
CHECK(zone_from_args(server, args, &zone, &zonename));
if (result != ISC_R_SUCCESS)
return (result);
if (zone == NULL) {
result = ISC_R_UNEXPECTEDEND;
goto cleanup;
}
/*
* Was this zone originally added at runtime?
* If not, we can't delete it now.
*/
if (!dns_zone_getadded(zone)) {
result = ISC_R_NOPERM;
goto cleanup;
}
if (zonename != NULL)
znamelen = strlen(zonename);
/* Dig out configuration for this zone */
view = dns_zone_getview(zone);
filename = view->new_zone_file;
if (filename == NULL) {
/* No adding zones in this view */
result = ISC_R_FAILURE;
goto cleanup;
}
/* Rewrite zone list */
result = isc_stdio_open(filename, "r", &ifp);
if (ifp != NULL && result == ISC_R_SUCCESS) {
char *found = NULL, *p = NULL;
size_t n;
/* Create a temporary file */
CHECK(isc_string_printf(buf, 1023, "%s.%ld", filename,
(long)getpid()));
if (!(tmpname = isc_mem_strdup(server->mctx, buf))) {
result = ISC_R_NOMEMORY;
goto cleanup;
}
CHECK(isc_stdio_open(tmpname, "w", &ofp));
/* Look for the entry for that zone */
while (fgets(buf, 1024, ifp)) {
/* A 'zone' line */
if (strncasecmp(buf, "zone", 4)) {
fputs(buf, ofp);
continue;
}
p = buf+4;
/* Locate a name */
while (*p &&
((*p == '"') || isspace((unsigned char)*p)))
p++;
/* Is that the zone we're looking for */
if (strncasecmp(p, zonename, znamelen)) {
fputs(buf, ofp);
continue;
}
/* And nothing else? */
p += znamelen;
if (isspace((unsigned char)*p) ||
*p == '"' || *p == '{') {
/* This must be the entry */
found = p;
break;
}
/* Spit it out, keep looking */
fputs(buf, ofp);
}
/* Skip over an option block (matching # of braces) */
if (found) {
int obrace = 0, cbrace = 0;
for (;;) {
while (*p) {
if (*p == '{') obrace++;
if (*p == '}') cbrace++;
p++;
}
if (obrace && (obrace == cbrace))
break;
if (!fgets(buf, 1024, ifp))
break;
p = buf;
}
/* Just spool the remainder of the file out */
result = isc_stdio_read(buf, 1, 1024, ifp, &n);
while (n > 0U) {
if (result == ISC_R_EOF)
result = ISC_R_SUCCESS;
CHECK(result);
isc_stdio_write(buf, 1, n, ofp, NULL);
result = isc_stdio_read(buf, 1, 1024, ifp, &n);
}
/* Move temporary into place */
CHECK(isc_file_rename(tmpname, view->new_zone_file));
} else {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_WARNING,
"deleted zone %s was missing from "
"new zone file", zonename);
goto cleanup;
}
}
/* Stop answering for this zone */
if (dns_zone_getdb(zone, &dbp) == ISC_R_SUCCESS) {
dns_db_detach(&dbp);
dns_zone_unload(zone);
}
CHECK(dns_zt_unmount(view->zonetable, zone));
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_SERVER, ISC_LOG_INFO,
"zone %s removed via delzone", zonename);
result = ISC_R_SUCCESS;
cleanup:
if (ifp != NULL)
isc_stdio_close(ifp);
if (ofp != NULL) {
isc_stdio_close(ofp);
isc_file_remove(tmpname);
}
if (tmpname != NULL)
isc_mem_free(server->mctx, tmpname);
if (zone != NULL)
dns_zone_detach(&zone);
return (result);
}
static void
newzone_cfgctx_destroy(void **cfgp) {
struct cfg_context *cfg;
REQUIRE(cfgp != NULL && *cfgp != NULL);
cfg = *cfgp;
if (cfg->actx != NULL)
cfg_aclconfctx_detach(&cfg->actx);
if (cfg->parser != NULL) {
if (cfg->config != NULL)
cfg_obj_destroy(cfg->parser, &cfg->config);
cfg_parser_destroy(&cfg->parser);
}
if (cfg->nzparser != NULL) {
if (cfg->nzconfig != NULL)
cfg_obj_destroy(cfg->nzparser, &cfg->nzconfig);
cfg_parser_destroy(&cfg->nzparser);
}
isc_mem_putanddetach(&cfg->mctx, cfg, sizeof(*cfg));
*cfgp = NULL;
}
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