/contrib/bind9/bin/named/server.c
C | 7648 lines | 5910 code | 887 blank | 851 comment | 1790 complexity | 0d51a127a90e8c0853cc6539ac9d6bce MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, BSD-3-Clause, LGPL-2.0, LGPL-2.1, BSD-2-Clause, 0BSD, JSON, AGPL-1.0, GPL-2.0
- /*
- * Copyright (C) 2004-2012 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 1.599.8.19 2012/02/22 00:33:32 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] = { "_dns64", "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;
- const char *dom;
- dlvobj = cfg_listelt_value(cfg_list_first(obj));
- dom = cfg_obj_asstring(cfg_tuple_get(dlvobj, "domain"));
- if (cfg_obj_isvoid(cfg_tuple_get(dlvobj, "trust-anchor"))) {
- /* If "no", skip; if "auto", use global default */
- if (!strcasecmp(dom, "no"))
- result = ISC_R_NOTFOUND;
- else if (!strcasecmp(dom, "auto")) {
- 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 && !lwresd_g_useresolvconf) {
- 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));
- /*
- * Ensure that zone keys are reloaded on reconfig
- */
- if ((dns_zone_getkeyopts(zone) & DNS_ZONEKEY_MAINTAIN) != 0)
- dns_zone_rekey(zone, ISC_FALSE);
- 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);
- dns_zone_synckeyzone(view->managed_keys);
- 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_boolean_t exclusive = ISC_FALSE;
- ISC_LIST_INIT(viewlist);
- ISC_LIST_INIT(builtin_viewlist);
- ISC_LIST_INIT(cachelist);
- /* 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);
- }
- /* Ensure exclusive access to configuration data. */
- if (!exclusive) {
- result = isc_task_beginexclusive(server->task);
- RUNTIME_CHECK(result == ISC_R_SUCCESS);
- exclusive = ISC_TRUE;
- }
- /*
- * 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. */
- if (exclusive)
- 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 */
- isc_task_beginexclusive(server->task);
- dns_view_thaw(view);
- result = configure_zone(cfg->config, parms, vconfig,
- server->mctx, view, cfg->actx, ISC_FALSE);
- dns_view_freeze(view);
- isc_task_endexclusive(server->task);
- 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;
- }