diff options
Diffstat (limited to 'contrib/bind/named/ns_init.c')
| -rw-r--r-- | contrib/bind/named/ns_init.c | 1137 |
1 files changed, 0 insertions, 1137 deletions
diff --git a/contrib/bind/named/ns_init.c b/contrib/bind/named/ns_init.c deleted file mode 100644 index a94e1d4516ee..000000000000 --- a/contrib/bind/named/ns_init.c +++ /dev/null @@ -1,1137 +0,0 @@ -#if !defined(lint) && !defined(SABER) -static char sccsid[] = "@(#)ns_init.c 4.38 (Berkeley) 3/21/91"; -static char rcsid[] = "$Id: ns_init.c,v 8.25 1997/06/01 20:34:34 vixie Exp $"; -#endif /* not lint */ - -/* - * ++Copyright++ 1986, 1990 - * - - * 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. - * - - * --Copyright-- - */ - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/socket.h> -#include <sys/stat.h> -#include <netinet/in.h> -#include <arpa/nameser.h> -#include <arpa/inet.h> -#include <syslog.h> -#include <resolv.h> -#include <stdio.h> -#include <errno.h> -#include <ctype.h> - -#include "named.h" - -#undef nsaddr - -enum limit { Datasize , Files }; - -static void zoneinit __P((struct zoneinfo *)), - get_forwarders __P((FILE *)), - boot_read __P((const char *filename, int includefile)), -#ifdef DEBUG - content_zone __P((int)), -#endif - do_reload __P((char *, int, int)), - free_forwarders __P((void)), - ns_limit __P((const char *name, int value)), - ns_checknames __P((const char *names, - const char *severity)), - ns_rlimit __P((const char *name, enum limit limit, - long value)), - ns_option __P((const char *name)); - -static struct zoneinfo *find_zone __P((char *, int, int)); - -static enum severity checkname_severity[num_trans]; - -/* - * 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(zp, timebase) - struct zoneinfo *zp; - time_t timebase; -{ - u_long refresh = (zp->z_refresh > 0) ? zp->z_refresh : INIT_REFRESH; - time_t half = (refresh + 1) / 2; - - zp->z_time = timebase + half + (rand() % half); -} - -/* - * Set new retry time for zone. - */ -void -ns_retrytime(zp, timebase) - struct zoneinfo *zp; - time_t timebase; -{ - zp->z_time = timebase + zp->z_retry; -} - -/* - * Read boot file for configuration info. - */ -void -ns_init(bootfile) - char *bootfile; -{ - register struct zoneinfo *zp; - static int loads = 0; /* number of times loaded */ - - dprintf(1, (ddt, "\nns_init(%s)\n", bootfile)); - gettime(&tt); - - memset(checkname_severity, '\0', sizeof checkname_severity); - checkname_severity[primary_trans] = fail; - checkname_severity[secondary_trans] = warn; - checkname_severity[response_trans] = ignore; - - if (loads == 0) { - if ((zones = - (struct zoneinfo *)calloc(64, sizeof(struct zoneinfo))) - == NULL) { - syslog(LOG_ERR, - "Not enough memory to allocate initial zones array"); - exit(1); - } - nzones = 1; /* zone zero is cache data */ - /* 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 zone data */ - zones[0].z_type = Z_CACHE; - zones[0].z_origin = ""; - } else { - /* Mark previous zones as not yet found in boot file. */ - for (zp = &zones[1]; zp < &zones[nzones]; zp++) - zp->z_flags &= ~Z_FOUND; -#ifdef LOCALDOM - if (localdomain) { - free(localdomain); - localdomain = NULL; - } -#endif - free_forwarders(); - free_netlist(enettab); -#ifdef XFRNETS - free_netlist(&xfrnets); -#endif -#ifdef BOGUSNS - free_netlist(&boglist); -#endif - forward_only = 0; - } - - dprintf(3, (ddt, "\n content of zones before loading \n")); -#ifdef DEBUG - if (debug >= 3) { - content_zone(nzones - 1); - } -#endif - boot_read(bootfile, 0); - - /* erase all old zones that were not found */ - for (zp = &zones[1]; zp < &zones[nzones]; zp++) { - if (zp->z_type && (zp->z_flags & Z_FOUND) == 0) { -#ifdef CLEANCACHE - remove_zone(hashtab, zp - zones, 1); -#else - remove_zone(hashtab, zp - zones); -#endif -#ifdef SECURE_ZONES - free_netlist(&zp->secure_nets); -#endif - do_reload(zp->z_origin, zp->z_type, zp->z_class); - syslog(LOG_NOTICE, "Zone \"%s\" was removed", zp->z_origin); - free(zp->z_origin); - free(zp->z_source); - bzero((char *) zp, sizeof(*zp)); - } - } - dprintf(2, (ddt,"\n content of zones after loading\n")); - -#ifdef DEBUG - if (debug >= 2) { - content_zone(nzones-1); - } -#endif - - /* - * Schedule calls to ns_maint(). - */ - if (!needmaint) - sched_maint(); - dprintf(1, (ddt, "exit ns_init()%s\n", - needmaint ? ", need maintenance immediately" : "")); - loads++; -} - -/* - * Read the actual boot file. - * Set up to recurse. - */ -static void -boot_read(filename, includefile) - const char *filename; - int includefile; -{ - register struct zoneinfo *zp; - char buf[MAXDNAME], obuf[MAXDNAME], *source; - FILE *fp; - int type; - int class; -#ifdef GEN_AXFR - char *class_p; -#endif - struct stat f_time; - static int tmpnum = 0; /* unique number for tmp zone files */ - int slineno; /* Saved global line number. */ - int i; - - if ((fp = fopen(filename, "r")) == NULL) { - syslog(LOG_ERR, "%s: %m", filename); - if (includefile) - return; - exit(1); - } - - slineno = lineno; - lineno = 1; - - while (!feof(fp) && !ferror(fp)) { - /* read named.boot keyword and process args */ - if (!getword(buf, sizeof(buf), fp, 0)) { - /* - * This is a blank line, a commented line, or the - * '\n' of the previous line. - */ - continue; - } - if (strcasecmp(buf, "directory") == 0) { - (void) getword(buf, sizeof(buf), fp, 0); - if (chdir(buf) < 0) { - syslog(LOG_CRIT, "directory %s: %m\n", - buf); - exit(1); - } - continue; - } else if (strcasecmp(buf, "sortlist") == 0) { - get_netlist(fp, enettab, ALLOW_NETS, buf); - continue; - } else if (strcasecmp(buf, "max-fetch") == 0) { - max_xfers_running = getnum(fp, filename, GETNUM_NONE); - continue; - } else if (strcasecmp(buf, "limit") == 0) { - (void) getword(buf, sizeof(buf), fp, 0); - ns_limit(buf, getnum(fp, filename, GETNUM_SCALED)); - continue; - } else if (strcasecmp(buf, "options") == 0) { - while (getword(buf, sizeof(buf), fp, 0)) - ns_option(buf); - continue; - } else if (strcasecmp(buf, "check-names") == 0) { - (void) getword(buf, sizeof(buf), fp, 0); - (void) getword(obuf, sizeof(obuf), fp, 0); - ns_checknames(buf, obuf); - continue; - } else if (strcasecmp(buf, "forwarders") == 0) { - get_forwarders(fp); - continue; - } else if (strcasecmp(buf, "slave") == 0) { - forward_only++; - continue; -#ifdef BOGUSNS - } else if (strcasecmp(buf, "bogusns") == 0) { - get_netlist(fp, &boglist, ALLOW_HOSTS, buf); - continue; -#endif -#ifdef XFRNETS - } else if ((strcasecmp(buf, "tcplist") == 0) || - (strcasecmp(buf, "xfrnets") == 0)) { - get_netlist(fp, &xfrnets, ALLOW_NETS, buf); - continue; -#endif -#ifdef LOCALDOM - } else if (strcasecmp(buf, "domain") == 0) { - if (getword(buf, sizeof(buf), fp, 1)) - localdomain = savestr(buf); - continue; -#endif - } else if (strcasecmp(buf, "include") == 0) { - if (getword(buf, sizeof(buf), fp, 0)) - boot_read(buf, 1); - continue; - } else if (strncasecmp(buf, "cache", 5) == 0) { - type = Z_CACHE; - class = C_IN; -#ifdef GEN_AXFR - if (class_p = strchr(buf, '/')) { - class = get_class(class_p+1); - - if (class != C_IN) { - syslog(LOG_NOTICE, - "cache directive with non-IN class is not supported (yet)"); - endline(fp); - continue; - } - } -#endif - } else if (strncasecmp(buf, "primary", 7) == 0) { - type = Z_PRIMARY; - class = C_IN; -#ifdef GEN_AXFR - if (class_p = strchr(buf, '/')) - class = get_class(class_p+1); -#endif - } else if (strncasecmp(buf, "secondary", 9) == 0) { - type = Z_SECONDARY; - class = C_IN; -#ifdef GEN_AXFR - if (class_p = strchr(buf, '/')) - class = get_class(class_p+1); -#endif -#ifdef STUBS - } else if (strncasecmp(buf, "stub", 4) == 0) { - type = Z_STUB; - class = C_IN; -#ifdef GEN_AXFR - if (class_p = strchr(buf, '/')) - class = get_class(class_p+1); -#endif -#endif - } else { - syslog(LOG_NOTICE, - "%s: line %d: unknown directive '%s'\n", - filename, lineno, buf); - endline(fp); - continue; - } - - /* - * read zone origin - */ - if (!getword(obuf, sizeof(obuf), fp, 1)) { - syslog(LOG_NOTICE, "%s: line %d: missing origin\n", - filename, lineno); - continue; - } - i = strlen(obuf); - if ((obuf[i-1] == '.') && (i != 1)) - syslog(LOG_INFO, - "%s: line %d: zone \"%s\" has trailing dot\n", - filename, lineno, obuf); - while ((--i >= 0) && (obuf[i] == '.')) - obuf[i] = '\0'; - dprintf(1, (ddt, "zone origin %s", obuf[0]?obuf:".")); - /* - * Read source file or host address. - */ - if (!getword(buf, sizeof(buf), fp, 0)) { - syslog(LOG_NOTICE, "%s: line %d: missing %s\n", - filename, lineno, -#ifdef STUBS - (type == Z_SECONDARY || type == Z_STUB) -#else - (type == Z_SECONDARY) -#endif - ?"host address" - :"source file"); - continue; - } - - /* - * Check for previous instance of this zone (reload). - */ - if (!(zp = find_zone(obuf, type, class))) { - if (type == Z_CACHE) { - zp = &zones[0]; - goto gotcache; - } - for (zp = &zones[1]; zp < &zones[nzones]; zp++) - if (zp->z_type == Z_NIL) - goto gotzone; - /* - * This code assumes that nzones never decreases. - */ - if (nzones % 64 == 0) { - dprintf(1, (ddt, - "Reallocating zones structure\n")); - /* - * Realloc() not used since it might damage zones - * if an error occurs. - */ - zp = (struct zoneinfo *) - malloc((64 + nzones) - * sizeof(struct zoneinfo)); - if (!zp) { - syslog(LOG_NOTICE, - "no memory for more zones"); - endline(fp); - continue; - } - bcopy((char *)zones, (char *)zp, - nzones * sizeof(struct zoneinfo)); - bzero((char *)&zp[nzones], - 64 * sizeof(struct zoneinfo)); - free(zones); - zones = zp; - } - zp = &zones[nzones++]; - gotzone: - zp->z_origin = savestr(obuf); - gotcache: - zp->z_type = type; - zp->z_class = class; - } - zp->z_addrcnt = 0; - - switch (type) { - case Z_CACHE: - source = savestr(buf); - dprintf(1, (ddt, ", source = %s\n", source)); - zp->z_refresh = 0; /* by default, no dumping */ - if (getword(buf, sizeof(buf), fp, 0)) { -#ifdef notyet - zp->z_refresh = atoi(buf); - if (zp->z_refresh <= 0) { - syslog(LOG_NOTICE, - "%s: line %d: bad refresh time '%s', ignored\n", - filename, lineno, buf); - zp->z_refresh = 0; - } else if (cache_file == NULL) - cache_file = source; -#else - syslog(LOG_NOTICE, - "%s: line %d: cache refresh ignored\n", - filename, lineno); -#endif - endline(fp); - } - /* - * If we've loaded this file, and the file has - * not been modified and contains no $include, - * then there's no need to reload. - */ - if (zp->z_source && - !strcmp(source, zp->z_source) && - !(zp->z_flags & Z_INCLUDE) && - stat(zp->z_source, &f_time) != -1 && - zp->z_ftime == f_time.st_mtime) { - dprintf(1, (ddt, "cache is up to date\n")); - if (source != cache_file) - free(source); - break; /* zone is already up to date */ - } - - /* file has changed, or hasn't been loaded yet */ - if (zp->z_source) { - free(zp->z_source); -#ifdef CLEANCACHE - remove_zone(fcachetab, 0, 1); -#else - remove_zone(fcachetab, 0); -#endif - } - zp->z_source = source; - dprintf(1, (ddt, "reloading zone\n")); - (void) db_load(zp->z_source, zp->z_origin, zp, NULL); - break; - - case Z_PRIMARY: - source = savestr(buf); - endline(fp); - - dprintf(1, (ddt, ", source = %s\n", source)); - /* - * If we've loaded this file, and the file has - * not been modified and contains no $include, - * then there's no need to reload. - */ - if (zp->z_source && - !strcmp(source, zp->z_source) && - !(zp->z_flags & Z_INCLUDE) && - stat(zp->z_source, &f_time) != -1 && - zp->z_ftime == f_time.st_mtime) { - dprintf(1, (ddt, "zone is up to date\n")); - free(source); - break; /* zone is already up to date */ - } - if (zp->z_source) { - free(zp->z_source); -#ifdef CLEANCACHE - remove_zone(hashtab, zp - zones, 1); -#else - remove_zone(hashtab, zp - zones); -#endif - } - zp->z_source = source; - zp->z_flags &= ~Z_AUTH; -#ifdef PURGE_ZONE - purge_zone(zp->z_origin, hashtab, zp->z_class); -#endif - dprintf(1, (ddt, "reloading zone\n")); - if (!db_load(zp->z_source, zp->z_origin, zp, NULL)) - zp->z_flags |= Z_AUTH; - zp->z_refresh = 0; /* no maintenance needed */ - zp->z_time = 0; - break; - - case Z_SECONDARY: -#ifdef STUBS - case Z_STUB: -#endif - source = NULL; - dprintf(1, (ddt, "\n\taddrs: ")); - do { - if (!inet_aton(buf, - &zp->z_addr[zp->z_addrcnt]) - ) { - source = savestr(buf); - endline(fp); - break; - } - dprintf(1, (ddt, "%s, ", buf)); - if ((int)++zp->z_addrcnt > NSMAX - 1) { - zp->z_addrcnt = NSMAX - 1; - dprintf(1, (ddt, - "\nns.h NSMAX reached\n")); - } - } while (getword(buf, sizeof(buf), fp, 0)); - dprintf(1, (ddt, "addrcnt = %d\n", zp->z_addrcnt)); - if (!source) { - /* - * We will always transfer this zone again - * after a reload. - */ - sprintf(buf, "%s/NsTmp%ld.%d", _PATH_TMPDIR, - (long)getpid(), tmpnum++); - source = savestr(buf); - zp->z_flags |= Z_TMP_FILE; - } else - zp->z_flags &= ~Z_TMP_FILE; - /* - * If we had a backup file name, and it was changed, - * free old zone and start over. If we don't have - * current zone contents, try again now in case - * we have a new server on the list. - */ - if (zp->z_source && - (strcmp(source, zp->z_source) || - (stat(zp->z_source, &f_time) == -1 || - (zp->z_ftime != f_time.st_mtime)))) { - dprintf(1, (ddt, - "backup file changed or missing\n")); - free(zp->z_source); - zp->z_source = NULL; - zp->z_serial = 0; /* force xfer */ - if (zp->z_flags & Z_AUTH) { - zp->z_flags &= ~Z_AUTH; -#ifdef CLEANCACHE - remove_zone(hashtab, zp - zones, 1); -#else - remove_zone(hashtab, zp - zones); -#endif - /* - * reload parent so that NS records are - * present during the zone transfer. - */ - do_reload(zp->z_origin, zp->z_type, - zp->z_class); - } - } - if (zp->z_source) - free(source); - else - zp->z_source = source; - if (!(zp->z_flags & Z_AUTH)) - zoneinit(zp); -#ifdef FORCED_RELOAD - else { - /* - ** Force secondary to try transfer right away - ** after SIGHUP. - */ - if (!(zp->z_flags & (Z_QSERIAL|Z_XFER_RUNNING)) - && reloading) { - zp->z_time = tt.tv_sec; - needmaint = 1; - } - } -#endif /* FORCED_RELOAD */ - break; - - } - if ((zp->z_flags & Z_FOUND) && /* already found? */ - (zp - zones) != DB_Z_CACHE) /* cache never sets Z_FOUND */ - syslog(LOG_NOTICE, - "Zone \"%s\" declared more than once", - zp->z_origin); - zp->z_flags |= Z_FOUND; - dprintf(1, (ddt, "zone[%d] type %d: '%s'", - zp-zones, type, - *(zp->z_origin) == '\0' ? "." : zp->z_origin)); - if (zp->z_refresh && zp->z_time == 0) - ns_refreshtime(zp, tt.tv_sec); - if (zp->z_time <= tt.tv_sec) - needmaint = 1; - dprintf(1, (ddt, " z_time %lu, z_refresh %lu\n", - (u_long)zp->z_time, (u_long)zp->z_refresh)); - } - (void) my_fclose(fp); - lineno = slineno; -} - -static void -zoneinit(zp) - register 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) - return; - result = stat(zp->z_source, &sb); -#ifdef PURGE_ZONE - if (result != -1) - purge_zone(zp->z_origin, hashtab, zp->z_class); -#endif - if (result == -1 || db_load(zp->z_source, zp->z_origin, zp, NULL)) { - /* - * 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))) { - zp->z_time = tt.tv_sec; - needmaint = 1; - } - } else { - zp->z_flags |= Z_AUTH; - } -} - -static void -get_forwarders(fp) - FILE *fp; -{ - char buf[MAXDNAME]; - register struct fwdinfo *fip = NULL, *ftp = NULL; - -#ifdef SLAVE_FORWARD - int forward_count = 0; -#endif - - dprintf(1, (ddt, "forwarders ")); - - /* On multiple forwarder lines, move to end of the list. */ -#ifdef SLAVE_FORWARD - if (fwdtab != NULL){ - forward_count++; - for (fip = fwdtab; fip->next != NULL; fip = fip->next) - forward_count++; - } -#else - if (fwdtab != NULL) { - for (fip = fwdtab; fip->next != NULL; fip = fip->next) { - ; - } - } -#endif /* SLAVE_FORWARD */ - - while (getword(buf, sizeof(buf), fp, 0)) { - if (strlen(buf) == 0) - break; - dprintf(1, (ddt," %s",buf)); - if (!ftp) { - ftp = (struct fwdinfo *)malloc(sizeof(struct fwdinfo)); - if (!ftp) - panic(errno, "malloc(fwdinfo)"); - } - if (inet_aton(buf, &ftp->fwdaddr.sin_addr)) { - ftp->fwdaddr.sin_port = ns_port; - ftp->fwdaddr.sin_family = AF_INET; - } else { - syslog(LOG_NOTICE, "'%s' (ignored, NOT dotted quad)", - buf); - continue; - } -#ifdef FWD_LOOP - if (aIsUs(ftp->fwdaddr.sin_addr)) { - syslog(LOG_NOTICE, - "Forwarder '%s' ignored, my address", - buf); - dprintf(1, (ddt, " (ignored, my address)")); - continue; - } -#endif /* FWD_LOOP */ - ftp->next = NULL; - if (fwdtab == NULL) - fwdtab = ftp; /* First time only */ - else - fip->next = ftp; - fip = ftp; - ftp = NULL; -#ifdef SLAVE_FORWARD - forward_count++; -#endif /* SLAVE_FORWARD */ - } - if (ftp) - free((char *)ftp); - -#ifdef SLAVE_FORWARD - /* - ** Set the slave retry time to 60 seconds total divided - ** between each forwarder - */ - if (forward_count != 0) { - slave_retry = (int) (60 / forward_count); - if(slave_retry <= 0) - slave_retry = 1; - } -#endif - - dprintf(1, (ddt, "\n")); -#ifdef DEBUG - if (debug > 2) { - for (ftp = fwdtab; ftp != NULL; ftp = ftp->next) { - fprintf(ddt, "ftp x%lx [%s] next x%lx\n", - (u_long)ftp, - inet_ntoa(ftp->fwdaddr.sin_addr), - (u_long)ftp->next); - } - } -#endif -} - -static void -free_forwarders() -{ - register struct fwdinfo *ftp, *fnext; - - for (ftp = fwdtab; ftp != NULL; ftp = fnext) { - fnext = ftp->next; - free((char *)ftp); - } - fwdtab = NULL; -} - -static struct zoneinfo * -find_zone(name, type, class) - char *name; - int type, class; -{ - register struct zoneinfo *zp; - - for (zp = &zones[1]; zp < &zones[nzones]; zp++) { - if (zp->z_type == type && zp->z_class == class && - strcasecmp(name, zp->z_origin) == 0) { - dprintf(2, (ddt, ", old zone (%d)", zp - zones)); - return (zp); - } - } - dprintf(2, (ddt, ", new zone")); - return NULL; -} - -static void -do_reload(domain, type, class) - char *domain; - int type; - int class; -{ - char *s; - struct zoneinfo *zp; - - dprintf(1, (ddt, "do_reload: %s %d %d\n", - *domain ? domain : ".", type, class)); - - /* the zone has changed type? */ - /* NOTE: we still exist so don't match agains ourselves */ - /* If we are a STUB or SECONDARY check that we have loaded */ - if (((type != Z_STUB) && (zp = find_zone(domain, Z_STUB, class)) && - zp->z_serial) || - ((type != Z_CACHE) && find_zone(domain, Z_CACHE, class)) || - ((type != Z_PRIMARY) && find_zone(domain, Z_PRIMARY, class)) || - ((type != Z_SECONDARY) - && (zp = find_zone(domain, Z_SECONDARY, class)) && zp->z_serial) - ) { - return; - } - - while ((s = strchr(domain, '.')) || *domain) { - if (s) - domain = s + 1; /* skip dot */ - else - domain = ""; /* root zone */ - - if ((zp = find_zone(domain, Z_STUB, class)) || - (zp = find_zone(domain, Z_CACHE, class)) || - (zp = find_zone(domain, Z_PRIMARY, class)) || - (zp = find_zone(domain, Z_SECONDARY, class))) { - - dprintf(1, (ddt, "do_reload: matched %s\n", - *domain ? domain : ".")); - -#ifdef CLEANCACHE - if (zp->z_type == Z_CACHE) - remove_zone(fcachetab, 0, 1); - else - remove_zone(hashtab, zp - zones, 1); -#else - if (zp->z_type == Z_CACHE) - remove_zone(fcachetab, 0); - else - remove_zone(hashtab, zp - zones); -#endif - zp->z_flags &= ~Z_AUTH; - - switch (zp->z_type) { - case Z_SECONDARY: - case Z_STUB: - zoneinit(zp); - break; - case Z_PRIMARY: - case Z_CACHE: - if (db_load(zp->z_source, zp->z_origin, zp, 0) - == 0) - zp->z_flags |= Z_AUTH; - break; - } - break; - } - } -} - -#ifdef DEBUG -/* prints out the content of zones */ -static void -content_zone(end) - int end; -{ - int i; - - for (i = 1; i <= end; i++) { - printzoneinfo(i); - } -} -#endif - -static void -ns_limit(name, value) - const char *name; - int value; -{ - if (!strcasecmp(name, "transfers-in")) { - max_xfers_running = value; - } else if (!strcasecmp(name, "transfers-per-ns")) { - max_xfers_per_ns = value; - } else if (!strcasecmp(name, "datasize")) { - ns_rlimit("datasize", Datasize, value); - } else if (!strcasecmp(name, "files")) { - ns_rlimit("files", Files, value); - } else { - syslog(LOG_ERR, - "error: unrecognized limit in bootfile: \"%s\"", - name); - exit(1); - } -} - -static int -select_string(strings, string) - const char *strings[]; - const char *string; -{ - int i; - - for (i = 0; strings[i] != NULL; i++) - if (!strcasecmp(strings[i], string)) - return (i); - return (-1); -} - -static void -ns_checknames(transport_str, severity_str) - const char *transport_str; - const char *severity_str; -{ - enum transport transport; - enum severity severity; - int i; - - if ((i = select_string(transport_strings, transport_str)) == -1) { - syslog(LOG_ERR, - "error: unrecognized transport type in bootfile: \"%s\"", - transport_str); - exit(1); - } - transport = (enum transport) i; - - if ((i = select_string(severity_strings, severity_str)) == -1) { - syslog(LOG_ERR, - "error: unrecognized severity type in bootfile: \"%s\"", - severity_str); - exit(1); - } - severity = (enum severity) i; - - checkname_severity[transport] = severity; - syslog(LOG_INFO, "check-names %s %s", transport_str, severity_str); -} - -enum context -ns_ptrcontext(owner) - const char *owner; -{ - if (samedomain(owner, "in-addr.arpa") || samedomain(owner, "ip6.int")) - return (hostname_ctx); - return (domain_ctx); -} - -enum context -ns_ownercontext(type, transport) - int type; - enum transport transport; -{ - enum context context; - - switch (type) { - case T_A: - case T_WKS: - case T_MX: - switch (transport) { - case primary_trans: - case secondary_trans: - context = owner_ctx; - break; - case response_trans: - context = hostname_ctx; - break; - default: - panic(-1, "impossible condition in ns_ownercontext()"); - } - break; - case T_MB: - case T_MG: - context = mailname_ctx; - default: - context = domain_ctx; - break; - } - return (context); -} - -int -ns_nameok(name, class, transport, context, owner, source) - const char *name; - int class; - enum transport transport; - enum context context; - struct in_addr source; - const char *owner; -{ - enum severity severity = checkname_severity[transport]; - int ok; - - 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: - panic(-1, "impossible condition in ns_nameok()"); - } - if (!ok) { - char *s, *o; - - if (source.s_addr == INADDR_ANY) - s = strdup(transport_strings[transport]); - else { - s = malloc(strlen(transport_strings[transport]) + - sizeof " from [000.000.000.000]"); - if (s) - sprintf(s, "%s from [%s]", - transport_strings[transport], - inet_ntoa(source)); - } - if (strcasecmp(owner, name) == 0) - o = strdup(""); - else { - const char *t = (*owner == '\0') ? "." : owner; - - o = malloc(strlen(t) + sizeof " (owner \"\")"); - if (o) - sprintf(o, " (owner \"%s\")", t); - } -#ifndef ultrix - syslog((transport == response_trans) ? LOG_INFO : LOG_NOTICE, - "%s name \"%s\"%s %s (%s) is invalid - %s", - context_strings[context], - name, o != NULL ? o : "[malloc failed]", p_class(class), - s != NULL ? s : "[malloc failed]", - (severity == fail) ? "rejecting" : "proceeding anyway"); -#endif - if (severity == warn) - ok = 1; - if (s) - free(s); - if (o) - free(o); - } - return (ok); -} - -int -ns_wildcard(name) - const char *name; -{ - if (*name != '*') - return (0); - return (*++name == '\0'); -} - -static void -ns_rlimit(name, limit, value) - const char *name; - enum limit limit; - long value; -{ -#ifndef HAVE_GETRUSAGE -# ifdef LINT - name; limit; value; -# endif - syslog(LOG_WARNING, "warning: unimplemented limit in bootfile: \"%s\"", - name); -#else - struct rlimit limits; - int rlimit = -1; - - switch (limit) { - case Datasize: - rlimit = RLIMIT_DATA; - break; - case Files: -#ifdef RLIMIT_NOFILE - rlimit = RLIMIT_NOFILE; -#endif - break; - default: - panic(-1, "impossible condition in ns_rlimit()"); - } - if (rlimit == -1) { - syslog(LOG_WARNING, - "limit \"%s\" not supported on this system - ignored", - name); - return; - } - if (getrlimit(rlimit, &limits) < 0) { - syslog(LOG_WARNING, "getrlimit(%s): %m", name); - return; - } - limits.rlim_cur = limits.rlim_max = value; - if (setrlimit(rlimit, &limits) < 0) { - syslog(LOG_WARNING, "setrlimit(%s, %ld): %m", name, value); - return; - } -#endif -} - -static void -ns_option(name) - const char *name; -{ - if (!strcasecmp(name, "no-recursion")) { - NoRecurse = 1; - } else if (!strcasecmp(name, "no-fetch-glue")) { - NoFetchGlue = 1; -#ifdef QRYLOG - } else if (!strcasecmp(name, "query-log")) { - qrylog = 1; -#endif - } else if (!strcasecmp(name, "forward-only")) { - forward_only = 1; -#ifndef INVQ - } else if (!strcasecmp(name, "fake-iquery")) { - fake_iquery = 1; -#endif - } else { - syslog(LOG_ERR, - "error: unrecognized option in bootfile: \"%s\"", - name); - exit(1); - } -} |