diff options
Diffstat (limited to 'contrib/bind/bin/named/ns_init.c')
| -rw-r--r-- | contrib/bind/bin/named/ns_init.c | 593 |
1 files changed, 0 insertions, 593 deletions
diff --git a/contrib/bind/bin/named/ns_init.c b/contrib/bind/bin/named/ns_init.c deleted file mode 100644 index 8cf0684..0000000 --- a/contrib/bind/bin/named/ns_init.c +++ /dev/null @@ -1,593 +0,0 @@ -#if !defined(lint) && !defined(SABER) -static const char sccsid[] = "@(#)ns_init.c 4.38 (Berkeley) 3/21/91"; -static const char rcsid[] = "$Id: ns_init.c,v 8.77.8.2 2003/09/04 04:09:09 marka Exp $"; -#endif /* not lint */ - -/* - * Copyright (c) 1986, 1990 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -/* - * Portions Copyright (c) 1993 by Digital Equipment Corporation. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies, and that - * the name of Digital Equipment Corporation not be used in advertising or - * publicity pertaining to distribution of the document or software without - * specific, written prior permission. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL - * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT - * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL - * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR - * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS - * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS - * SOFTWARE. - */ - -/* - * Portions Copyright (c) 1996-2000 by Internet Software Consortium. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS - * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE - * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL - * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR - * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS - * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS - * SOFTWARE. - */ - -#include "port_before.h" - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/socket.h> -#include <sys/stat.h> -#include <sys/un.h> - -#include <netinet/in.h> -#include <arpa/nameser.h> -#include <arpa/inet.h> - -#include <ctype.h> -#include <errno.h> -#include <resolv.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <syslog.h> -#include <time.h> - -#include <isc/eventlib.h> -#include <isc/logging.h> -#include <isc/memcluster.h> - -#include <isc/dst.h> - -#include "port_after.h" - -#include "named.h" - -#ifdef DEBUG -static void content_zone(int, int); -#endif -static void purgeandload(struct zoneinfo *zp); - -/* - * Set new refresh time for zone. Use a random number in the last half of - * the refresh limit; we want it to be substantially correct while still - * preventing slave synchronization. - */ -void -ns_refreshtime(struct zoneinfo *zp, time_t timebase) { - u_long refresh = (zp->z_refresh > 0) ? zp->z_refresh : INIT_REFRESH; - time_t half = (refresh + 1) / 2; - - if (zp->z_flags & Z_NEEDREFRESH) { - zp->z_flags &= ~Z_NEEDREFRESH; - zp->z_time = timebase; - } else - zp->z_time = timebase + half + (rand() % half); -} - -/* - * Set new retry time for zone. - */ -void -ns_retrytime(struct zoneinfo *zp, time_t timebase) { - - zp->z_flags &= ~Z_NEEDREFRESH; - zp->z_time = timebase + zp->z_retry; -} - -/* - * Read configuration file and save it as internal state. - */ -time_t -ns_init(const char *conffile) { - struct zoneinfo *zp; - static int loads = 0; /* number of times loaded */ - time_t mtime; - - ns_debug(ns_log_config, 1, "ns_init(%s)", conffile); - gettime(&tt); - - if (loads == 0) { - /* Init zone data. */ - zones = NULL; - INIT_LIST(freezones); - INIT_LIST(reloadingzones); - nzones = 0; - make_new_zones(); - - /* Init cache. */ - zones[0].z_type = z_cache; - zones[0].z_origin = savestr("", 1); - - /* Allocate cache hash table, formerly the root hash table. */ - hashtab = savehash((struct hashbuf *)NULL); - - /* Allocate root-hints/file-cache hash table. */ - fcachetab = savehash((struct hashbuf *)NULL); - - /* Init other misc stuff. */ - dst_init(); - init_configuration(); - } else { - /* Mark previous zones as not yet found in boot file. */ - block_signals(); - for (zp = &zones[1]; zp < &zones[nzones]; zp++) - if (zp->z_type != z_nil) { - zp->z_flags &= ~Z_FOUND; - if (LINKED(zp, z_reloadlink)) - UNLINK(reloadingzones, zp, - z_reloadlink); - } - unblock_signals(); - } - -#ifdef DEBUG - if (debug >= 3) { - ns_debug(ns_log_config, 3, "content of zones before loading"); - content_zone(nzones - 1, 3); - } -#endif - - mtime = load_configuration(conffile); - - /* Erase all old zones that were not found. */ - for (zp = &zones[0]; zp < &zones[nzones]; zp++) { - if (zp->z_type == z_cache) - continue; - if (zp->z_type != z_nil && (zp->z_flags & Z_FOUND) == 0) - remove_zone(zp, "removed"); - } - /* Reload parent zones of zones removed */ - for (zp = &zones[0]; zp < &zones[nzones]; zp++) { - if (zp->z_type == z_cache) - continue; - if (zp->z_type != z_nil && - (zp->z_flags & Z_PARENT_RELOAD) != 0) { - zp->z_flags &= ~Z_PARENT_RELOAD; - purgeandload(zp); - } - } - -#ifdef DEBUG - if (debug >= 2) { - ns_debug(ns_log_config, 2, "content of zones after loading"); - content_zone(nzones-1, 2); - } -#endif - - ns_debug(ns_log_config, 1, "exit ns_init()"); - loads++; - return (mtime); -} - -void -zoneinit(struct zoneinfo *zp) { - struct stat sb; - int result; - - /* - * Try to load zone from backup file, - * if one was specified and it exists. - * If not, or if the data are out of date, - * we will refresh the zone from a primary - * immediately. - */ - if (zp->z_source == NULL) - return; - result = stat(zp->z_source, &sb); - if (result != -1) { - ns_stopxfrs(zp); - purge_zone(zp, hashtab); - } - if (result == -1 || - db_load(zp->z_source, zp->z_origin, zp, NULL, ISNOTIXFR)) - { - /* - * Set zone to be refreshed immediately. - */ - zp->z_refresh = INIT_REFRESH; - zp->z_retry = INIT_REFRESH; - if ((zp->z_flags & (Z_QSERIAL|Z_XFER_RUNNING)) == 0) { - zp->z_time = tt.tv_sec; - sched_zone_maint(zp); - } - } else { - zp->z_flags |= Z_AUTH; - zp->z_flags &= ~(Z_NEED_RELOAD|Z_EXPIRED); - ns_refreshtime(zp, tt.tv_sec); - sched_zone_maint(zp); - } -} - -/* - * Purge the zone and reload all parent zones. This needs to be done when - * we unload a zone, since the child zone will have stomped the parent's - * delegation to that child when it was first loaded. - */ -void -do_reload(struct zoneinfo *ozp, int mark) { - struct zoneinfo *zp; - const char *domain = ozp->z_origin; - int type = ozp->z_type; - int class = ozp->z_class; - - ns_debug(ns_log_config, 1, "do_reload: %s %d %d %d", - *domain ? domain : ".", type, class, mark); - - /* - * Check if the zone has changed type. If so, we might not need to - * do any purging or parent reloading. - * - * If the new zone is a master zone, then it will have purged the - * old data and loaded, so we don't need to do anything. - * - * If the new zone is a slave or stub zone and has successfully loaded, - * then we don't need to do anything either. - * - * NOTE: we take care not to match ourselves. - */ - zp = find_zone(domain, class); - if (zp != NULL && - ((type != z_master && zp->z_type == z_master) || - (type != z_slave && zp->z_type == z_slave && zp->z_serial != 0) || - (type != z_stub && zp->z_type == z_stub && zp->z_serial != 0))) - return; - - /* - * Clean up any leftover data. - */ - ns_stopxfrs(zp); - if (type == z_hint || (type == z_stub && *domain == 0)) - purge_zone(ozp, fcachetab); - else - purge_zone(ozp, hashtab); - - /* - * Reload - */ - while (*domain) { - const char *s; - int escaped; - - /* - * XXX this is presentation level hair and belongs elsewhere. - */ - escaped = 0; - for (s = domain; *s != '\0'; s++) { - if (!escaped) { - if (*s == '.') - break; - else if (*s == '\\') - escaped = 1; - } else - escaped = 0; - } - - if (*s != '\0') - domain = s + 1; /* skip label and its separator */ - else - domain = ""; /* root zone */ - - zp = find_zone(domain, class); - if (zp != NULL && zp->z_type != Z_HINT) { - ns_debug(ns_log_config, 1, "do_reload: matched %s", - *domain ? domain : "."); - if (mark) - zp->z_flags |= Z_PARENT_RELOAD; - else - purgeandload(zp); - break; - } - } -} - -static void -purgeandload(struct zoneinfo *zp) { - -#ifdef BIND_UPDATE - /* - * A dynamic zone might have changed, so we - * need to dump it before removing it. - */ - if (zp->z_type == Z_PRIMARY && - (zp->z_flags & Z_DYNAMIC) != 0 && - ((zp->z_flags & Z_NEED_SOAUPDATE) != 0 || - (zp->z_flags & Z_NEED_DUMP) != 0)) - (void) zonedump(zp, ISNOTIXFR); -#endif - ns_stopxfrs(zp); - - if (zp->z_type == Z_HINT) - purge_zone(zp, fcachetab); - else - purge_zone(zp, hashtab); - - zp->z_flags &= ~Z_AUTH; - - switch (zp->z_type) { - case Z_SECONDARY: - case Z_STUB: - zoneinit(zp); - break; - case Z_PRIMARY: - if (db_load(zp->z_source, zp->z_origin, zp, 0, ISNOTIXFR) == 0) - zp->z_flags |= Z_AUTH; - break; - case Z_HINT: - case Z_CACHE: - (void)db_load(zp->z_source, zp->z_origin, zp, 0, ISNOTIXFR); - break; - } -} - -#ifdef DEBUG -/* prints out the content of zones */ -static void -content_zone(int end, int level) { - int i; - - for (i = 0; i <= end; i++) { - printzoneinfo(i, ns_log_config, level); - } -} -#endif - -enum context -ns_ptrcontext(owner) - const char *owner; -{ - if (ns_samedomain(owner, "in-addr.arpa") || - ns_samedomain(owner, "ip6.int")) - return (hostname_ctx); - return (domain_ctx); -} - -enum context -ns_ownercontext(type, transport) - int type; - enum transport transport; -{ - enum context context = domain_ctx; - - switch (type) { - case T_A: - case T_WKS: - case T_MX: - switch (transport) { - case update_trans: - case primary_trans: - case secondary_trans: - context = owner_ctx; - break; - case response_trans: - context = hostname_ctx; - break; - default: - panic("impossible condition in ns_ownercontext()", - NULL); - } - break; - case T_MB: - case T_MG: - context = mailname_ctx; - break; - default: - /* Nothing to do. */ - break; - } - return (context); -} - -int -ns_nameok(const struct qinfo *qry, const char *name, int class, - struct zoneinfo *zp, enum transport transport, - enum context context, - const char *owner, - struct in_addr source) -{ - enum severity severity = not_set; - int ok = 1; - - if (zp != NULL) - severity = zp->z_checknames; - if (severity == not_set) - severity = server_options->check_names[transport]; - - if (severity == ignore) - return (1); - switch (context) { - case domain_ctx: - ok = (class != C_IN) || res_dnok(name); - break; - case owner_ctx: - ok = (class != C_IN) || res_ownok(name); - break; - case mailname_ctx: - ok = res_mailok(name); - break; - case hostname_ctx: - ok = res_hnok(name); - break; - default: - ns_panic(ns_log_default, 1, - "unexpected context %d in ns_nameok", (int)context); - } - if (!ok) { - char *q, *s, *o; - - if (source.s_addr == INADDR_ANY) - s = savestr(transport_strings[transport], 0); - else { - s = newstr(strlen(transport_strings[transport]) + - sizeof " from [000.000.000.000] for [000.000.000.000]", 0); - if (s != NULL) { - if (transport == response_trans && qry != NULL) { - if ((qry->q_flags & Q_PRIMING) != 0) { - sprintf(s, "%s from [%s] for priming", - transport_strings[transport], - inet_ntoa(source)); - } else if ((qry->q_flags & Q_ZSERIAL) != 0) { - sprintf(s, "%s from [%s] for soacheck", - transport_strings[transport], - inet_ntoa(source)); - } else if ((qry->q_flags & Q_SYSTEM) != 0) { - sprintf(s, "%s from [%s] for sysquery", - transport_strings[transport], - inet_ntoa(source)); - } else { - q=strdup(inet_ntoa(qry->q_from.sin_addr)); - sprintf(s, "%s from [%s] for [%s]", - transport_strings[transport], - inet_ntoa(source), - q != NULL ? q : "memget failed"); - free(q); - } - } else { - sprintf(s, "%s from [%s]", - (transport == response_trans) - ? "query" - : transport_strings[transport], - inet_ntoa(source)); - } - } - } - if (ns_samename(owner, name) == 1) - o = savestr("", 0); - else { - const char *t = (*owner == '\0') ? "." : owner; - - o = newstr(strlen(t) + sizeof " (owner \"\")", 0); - if (o) - sprintf(o, " (owner \"%s\")", t); - } - /* - * We use log_write directly here to avoid duplicating - * the message formatting and arguments. - */ - log_write(log_ctx, ns_log_default, - (transport != response_trans) || - (o == NULL) || (s == NULL) || - ( (qry != NULL) && - (qry->q_flags & (Q_PRIMING|Q_ZSERIAL)) ) ? - log_warning : log_info, - "%s name \"%s\"%s %s (%s) is invalid - %s", - context_strings[context], - name, o != NULL ? o : "[memget failed]", - p_class(class), - s != NULL ? s : "[memget failed]", - (severity == fail) ? - "rejecting" : "proceeding anyway"); - if (severity == warn) - ok = 1; - if (s != NULL) - (void)freestr(s); - if (o != NULL) - (void)freestr(o); - } - return (ok); -} - -int -ns_wildcard(const char *name) { - if (*name != '*') - return (0); - return (*++name == '\0'); -} - -void -ns_shutdown() { - struct zoneinfo *zp; - -#ifdef BIND_NOTIFY - ns_unnotify(); -#endif - /* Erase zones. */ - for (zp = &zones[0]; zp < &zones[nzones]; zp++) { - if (zp->z_type) { - if (zp->z_type != z_hint && zp->z_type != z_cache) { - ns_stopxfrs(zp); - purge_zone(zp, hashtab); - } else if (zp->z_type == z_hint) - purge_zone(zp, fcachetab); - free_zone_contents(zp, 1); - } - } - - /* Erase the cache. */ - clean_cache(hashtab, 1); - hashtab->h_cnt = 0; /* ??? */ - rm_hash(hashtab); - hashtab = NULL; - clean_cache(fcachetab, 1); - fcachetab->h_cnt = 0; /* ??? */ - rm_hash(fcachetab); - fcachetab = NULL; - - if (zones != NULL) - memput(zones, nzones * sizeof *zones); - zones = NULL; - - freeComplaints(); - shutdown_configuration(); -} |
