diff options
Diffstat (limited to 'contrib/bind/bin/named/ns_notify.c')
| -rw-r--r-- | contrib/bind/bin/named/ns_notify.c | 462 |
1 files changed, 0 insertions, 462 deletions
diff --git a/contrib/bind/bin/named/ns_notify.c b/contrib/bind/bin/named/ns_notify.c deleted file mode 100644 index 286b3eb..0000000 --- a/contrib/bind/bin/named/ns_notify.c +++ /dev/null @@ -1,462 +0,0 @@ -#if !defined(lint) && !defined(SABER) -static const char rcsid[] = "$Id: ns_notify.c,v 8.20 2002/04/25 05:27:12 marka Exp $"; -#endif /* not lint */ - -/* - * Copyright (c) 1994-2000 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. - */ - -/* Import. */ - -#include "port_before.h" - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/socket.h> -#include <sys/file.h> -#include <sys/un.h> - -#include <netinet/in.h> -#include <arpa/nameser.h> -#include <arpa/inet.h> - -#include <errno.h> -#include <limits.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 BIND_NOTIFY - -/* Types. */ - -struct pnotify { - char * name; - ns_class class; - ns_type type; - evTimerID timer; - LINK(struct pnotify) link; -}; - -/* Forward. */ - -static void sysnotify(const char *, ns_class, ns_type); -static void sysnotify_slaves(const char *, const char *, - ns_class, ns_type, int, int *, int *); -static void sysnotify_ns(const char *, const char *, - ns_class, ns_type, int, int *, int *); -static void free_notify(struct pnotify *); -static void notify_timer(evContext, void *, - struct timespec, struct timespec); - -/* Local. */ - -static LIST(struct pnotify) pending_notifies; -static LIST(struct pnotify) loading_notifies; - -/* Public. */ - -/* - * ns_notify(dname, class, type) - * call this when a zone has changed and its slaves need to know. - */ -void -ns_notify(const char *dname, ns_class class, ns_type type) { - static const char no_room[] = "%s failed, cannot notify for zone %s"; - int delay, max_delay; - struct zoneinfo *zp; - struct pnotify *ni; - - zp = find_auth_zone(dname, class); - if (zp == NULL) { - ns_warning(ns_log_notify, - "no zone found for notify (\"%s\" %s %s)", - (dname && *dname) ? dname : ".", - p_class(class), p_type(type)); - return; - } - if (ns_samename(dname, zp->z_origin) != 1) { - ns_warning(ns_log_notify, - "notify not called with top of zone (\"%s\" %s %s)", - (dname && *dname) ? dname : ".", - p_class(class), p_type(type)); - return; - } - if ((zp->z_flags & Z_NOTIFY) != 0) { - ns_info(ns_log_notify, - "suppressing duplicate notify (\"%s\" %s %s)", - (dname && *dname) ? dname : ".", - p_class(class), p_type(type)); - return; - } - ni = memget(sizeof *ni); - if (ni == NULL) { - ns_info(ns_log_notify, no_room, "memget", dname); - return; - } - ni->name = savestr(dname, 0); - if (ni->name == NULL) { - memput(ni, sizeof *ni); - ni = NULL; - ns_info(ns_log_notify, no_room, "memget", dname); - return; - } - ni->class = class; - ni->type = type; - INIT_LINK(ni, link); - evInitID(&ni->timer); - - if (loading != 0) { - APPEND(loading_notifies, ni, link); - return; - } - - /* Delay notification for from five seconds up to fifteen minutes. */ - max_delay = MIN(nzones, 895); - max_delay = MAX(max_delay, 25); - delay = 5 + (rand() % max_delay); - if (evSetTimer(ev, notify_timer, ni, - evAddTime(evNowTime(), evConsTime(delay, 0)), - evConsTime(0, 0), &ni->timer) < 0) { - ns_error(ns_log_notify, "evSetTimer() failed: %s", - strerror(errno)); - ni->name = freestr(ni->name); - memput(ni, sizeof *ni); - return; - } - - zp->z_flags |= Z_NOTIFY; - APPEND(pending_notifies, ni, link); - ns_debug(ns_log_notify, 3, - "ns_notify(%s, %s, %s): ni %p, zp %p, delay %d", - (dname && *dname) ? dname : ".", - p_class(class), p_type(type), - ni, zp, delay); -} - -void -notify_afterload() { - struct pnotify *ni; - - INSIST(loading == 0); - while ((ni = HEAD(loading_notifies)) != NULL) { - UNLINK(loading_notifies, ni, link); - ns_notify(ni->name, ni->class, ni->type); - ni->name = freestr(ni->name); - memput(ni, sizeof *ni); - } -} - -/* - * ns_unnotify() - * call this when all pending notifies are now considered junque. - */ -void -ns_unnotify(void) { - while (!EMPTY(pending_notifies)) { - struct pnotify *ni = HEAD(pending_notifies); - - INSIST(LINKED(ni, link)); - UNLINK(pending_notifies, ni, link); - free_notify(ni); - } -} - -/* - * ns_stopnotify(const char *dname, ns_class class) - * stop notifies for this particular zone. - */ -void -ns_stopnotify(const char *dname, ns_class class) { - struct pnotify *ni; - - ni = HEAD(pending_notifies); - while (ni != NULL && - (ni->class != class || ns_samename(ni->name, dname) != 1)) - ni = NEXT(ni, link); - - if (ni != NULL) { - UNLINK(pending_notifies, ni, link); - free_notify(ni); - } -} - -/* Private. */ - -/* - * sysnotify(dname, class, type) - * cause a NOTIFY request to be sysquery()'d to each slave server - * of the zone that "dname" is within. - */ -static void -sysnotify(const char *dname, ns_class class, ns_type type) { - const char *zname; - u_int32_t zserial; - int nns, na, i; - struct zoneinfo *zp; - struct in_addr *also_addr; - - ns_debug(ns_log_notify, 3, "sysnotify(%s, %s, %s)", - dname, p_class(class), p_type(type)); - zp = find_auth_zone(dname, class); - if (zp == NULL) { - ns_warning(ns_log_notify, "sysnotify: can't find \"%s\" (%s)", - dname, p_class(class)); - return; - } - if (ns_samename(dname, zp->z_origin) != 1) { - ns_warning(ns_log_notify, "sysnotify: not auth for zone %s", - dname); - return; - } - if (zp->z_notify == notify_no || - (zp->z_notify == notify_use_default && - server_options->notify == notify_no)) - return; - if (zp->z_type != z_master && zp->z_type != z_slave) { - ns_warning(ns_log_notify, "sysnotify: %s not master or slave", - dname); - return; - } - zname = zp->z_origin; - zserial = zp->z_serial; - nns = na = 0; - if (zp->z_notify == notify_yes || - (zp->z_notify == notify_use_default && - server_options->notify == notify_yes)) - sysnotify_slaves(dname, zname, class, type, - zp - zones, &nns, &na); - - /* - * Handle any global or zone-specific also-notify clauses - */ - if (zp->z_notify_count != 0) { - /* zone-specific also notify */ - - ns_debug(ns_log_notify, 3, "zone notify ns = %d", - zp->z_notify_count); - - also_addr = zp->z_also_notify; - for (i = 0; i < zp->z_notify_count; i++) { - ns_debug(ns_log_notify, 4, "notifying %s", - inet_ntoa(*also_addr)); - sysquery(dname, class, type, also_addr, NULL, 1, - ns_port, NS_NOTIFY_OP, 0); - also_addr++; - } - nns += zp->z_notify_count; - na += zp->z_notify_count; - } else if (server_options->notify_count != 0) { - ns_debug(ns_log_notify, 4, "global notify ns = %d", - server_options->notify_count); - also_addr = server_options->also_notify; - for (i = 0; i < server_options->notify_count; i++) { - ns_debug(ns_log_notify, 3, "notifying %s", - inet_ntoa(*also_addr)); - sysquery(dname, class, type, also_addr, NULL, 1, - ns_port, ns_o_notify, 0); - also_addr++; - } - nns += server_options->notify_count; - na += server_options->notify_count; - } - - if (nns != 0 || na != 0) - ns_info(ns_log_notify, - "Sent NOTIFY for \"%s %s %s %u\" (%s); %d NS, %d A", - dname, p_class(class), p_type(type), zserial, zname, nns, na); -} - -static void -sysnotify_slaves(const char *dname, const char *zname, - ns_class class, ns_type type, - int zn, int *nns, int *na) -{ - const char *mname, *fname; - struct hashbuf *htp; - struct namebuf *np; - struct databuf *dp; - - /* - * Master. - */ - htp = hashtab; - np = nlookup(zname, &htp, &fname, 0); - if (np == NULL) { - ns_warning(ns_log_notify, - "sysnotify: found name \"%s\" but not zone", - dname); - return; - } - mname = NULL; - for (dp = np->n_data; dp != NULL; dp = dp->d_next) { - if (dp->d_zone == DB_Z_CACHE || !match(dp, class, ns_t_soa)) - continue; - if (dp->d_type == ns_t_sig) - continue; - if (mname) { - ns_notice(ns_log_notify, - "multiple SOA's for zone \"%s\"?", - zname); - return; - } - mname = (char *) dp->d_data; - } - if (mname == NULL) { - ns_notice(ns_log_notify, "no SOA found for zone \"%s\"", - zname); - return; - } - for (dp = np->n_data; dp != NULL; dp = dp->d_next) { - if (dp->d_zone == DB_Z_CACHE || !match(dp, class, ns_t_ns)) - continue; - if (dp->d_type == ns_t_sig) - continue; - if (ns_samename((char*)dp->d_data, mname) == 1) - continue; - sysnotify_ns(dname, (char *)dp->d_data, class, type, - zn, nns, na); - } -} - -static void -sysnotify_ns(const char *dname, const char *aname, - ns_class class, ns_type type, - int zn, int *nns, int *na) -{ - struct databuf *adp; - struct namebuf *anp; - const char *fname; - struct in_addr nss[NSMAX]; - struct hashbuf *htp; - int is_us, nsc, auth6, neg; - int cname = 0; - - htp = hashtab; - anp = nlookup(aname, &htp, &fname, 0); - nsc = 0; - is_us = 0; - auth6 = 0; - neg = 0; - if (anp != NULL) - for (adp = anp->n_data; adp; adp = adp->d_next) { - struct in_addr ina; - - if (adp->d_class != class) - continue; - if (adp->d_rcode == NXDOMAIN) { - neg = 1; - break; - } - if (adp->d_type == T_CNAME && adp->d_rcode == 0) { - cname = 1; - ns_error(ns_log_notify, - "NS '%s' for '%s/%s' is a CNAME", - *aname ? aname : ".", - *dname ? dname : ".", - p_class(class)); - break; - } - if ((adp->d_type == T_AAAA || adp->d_type == ns_t_a6) && - (zones[adp->d_class].z_type == z_master || - zones[adp->d_class].z_type == z_slave)) { - auth6 = 1; - continue; - } - if (!match(adp, class, T_A)) - continue; - if (adp->d_rcode) { - neg = 1; - continue; - } - if (adp->d_type == ns_t_sig) - continue; - ina = ina_get(adp->d_data); - if (aIsUs(ina)) { - is_us = 1; - continue; - } - if (nsc < NSMAX) - nss[nsc++] = ina; - } /*next A*/ - if (nsc == 0) { - if (!is_us && !cname && !auth6 && !neg && - !NS_OPTION_P(OPTION_NOFETCHGLUE)) { - struct qinfo *qp; - - qp = sysquery(aname, class, ns_t_a, NULL, NULL, 0, - ns_port, ns_o_query, 0); - if (qp != NULL) - qp->q_notifyzone = zn; - } - return; - } - sysquery(dname, class, type, nss, NULL, nsc, ns_port, ns_o_notify, 0); - (*nns)++; - *na += nsc; -} - -static void -free_notify(struct pnotify *ni) { - struct zoneinfo *zp; - - INSIST(!LINKED(ni, link)); - zp = find_auth_zone(ni->name, ni->class); - if (zp != NULL && ns_samename(ni->name, zp->z_origin) == 1) { - INSIST((zp->z_flags & Z_NOTIFY) != 0); - zp->z_flags &= ~Z_NOTIFY; - } - if (evTestID(ni->timer)) { - evClearTimer(ev, ni->timer); - evInitID(&ni->timer); - } - ni->name = freestr(ni->name); - memput(ni, sizeof *ni); -} - -static void -notify_timer(evContext ctx, void *uap, - struct timespec due, - struct timespec inter) -{ - struct pnotify *ni = uap; - - UNUSED(ctx); - UNUSED(due); - UNUSED(inter); - - INSIST(evTestID(ni->timer)); - evInitID(&ni->timer); - INSIST(LINKED(ni, link)); - UNLINK(pending_notifies, ni, link); - sysnotify(ni->name, ni->class, ni->type); - free_notify(ni); -} - -#endif /*BIND_NOTIFY*/ |
