2 #include <sys/socket.h>
4 Unacked *rlm_nacklist = NULL; /* not acked list for realm-realm
6 ZRealm *otherrealms; /* points to an array of the known
8 int nrealms = 0; /* number of other realms */
13 * ZRealm *realm_which_realm(struct sockaddr_in *who)
14 * figures out if this packet came from another realm's server
16 * ZRealm *realm_get_realm_by_pid(int pid)
17 * figures out which realm a child handler was for
19 * void kill_realm_pids()
20 * kills all ticket getting childen
22 * char *realm_expand_realm(char *realmname)
23 * figures out what an abbreviated realm expands to
25 * Code_t realm_send_realms()
26 * loops through all realms for a brain dump
28 * int realm_bound_for_realm(char *realm, char *recip)
29 * figures out if recip is in realm, expanding recip's realm
31 * int realm_sender_in_realm(char *realm, char *sender)
32 * figures out if sender is in realm
34 * ZRealm *realm_get_realm_by_name(char *name)
35 * finds a realm struct from the realm array by name, tries expansion
37 * Code_t realm_dispatch(ZNotice_t *notice, int auth, struct sockaddr_in *who,
39 * dispatches a message from a foreign realm
42 * sets up the realm module
44 * void realm_deathgram()
45 * tells other realms this server is going down
48 * tells other realms to resend their idea of their subs to us
50 * Code_t realm_control_dispatch(ZNotice_t *notice, int auth,
51 * struct sockaddr_in *who, Server *server,
53 * dispatches a foreign realm control message
55 * void realm_handoff(ZNotice_t *notice, int auth, struct sockaddr_in *who,
56 * ZRealm *realm, int ack_to_sender)
57 * hands off a message to another realm
59 * void realm_dump_realms(File *fp)
60 * do a database dump of foreign realm info
63 static void realm_sendit(ZNotice_t *notice, struct sockaddr_in *who, int auth, ZRealm *realm, int ack_to_sender);
64 static Code_t realm_sendit_auth(ZNotice_t *notice, struct sockaddr_in *who, int auth, ZRealm *realm, int ack_to_sender);
65 static void rlm_ack(ZNotice_t *notice, Unacked *nacked);
66 static void rlm_nack_cancel(ZNotice_t *notice, struct sockaddr_in *who);
67 static void rlm_rexmit(void *arg);
68 static Code_t realm_ulocate_dispatch(ZNotice_t *notice,int auth,struct sockaddr_in *who,Server *server,ZRealm *realm);
69 static Code_t realm_new_server(struct sockaddr_in *, ZNotice_t *, ZRealm *);
70 static Code_t realm_set_server(struct sockaddr_in *, ZRealm *);
72 static Code_t ticket_retrieve(ZRealm *realm);
73 static int ticket_lookup(char *realm);
77 realm_get_idx_by_addr(ZRealm *realm,
78 struct sockaddr_in *who)
80 struct sockaddr_in *addr;
83 /* loop through the realms */
84 for (addr = realm->addrs, b = 0; b < realm->count; b++, addr++)
85 if (addr->sin_addr.s_addr == who->sin_addr.s_addr)
92 realm_expand_realm(char *realmname)
97 /* First, look for an exact match (case insensitive) */
99 if (!strcasecmp(ZGetRealm(), realmname))
103 for (realm = otherrealms, a = 0; a < nrealms; a++, realm++)
104 if (!strcasecmp(realm->name, realmname))
107 /* No exact match. See if there's a partial match */
109 if (!strncasecmp(ZGetRealm(), realmname, strlen(realmname)))
113 for (realm = otherrealms, a = 0; a < nrealms; a++, realm++)
114 if (!strncasecmp(realm->name, realmname, strlen(realmname)))
120 realm_get_realm_by_pid(int pid)
125 for (realm = otherrealms, a = 0; a < nrealms; a++, realm++)
126 if (realm->child_pid == pid)
133 kill_realm_pids(void)
138 for (realm = otherrealms, a = 0; a < nrealms; a++, realm++)
139 if (realm->child_pid != 0)
140 kill(realm->child_pid, 9);
146 get_realm_lists(char *file)
148 ZRealmname *rlm_list, *rlm;
149 int ii, nused, ntotal;
151 char buf[REALM_SZ + MAXHOSTNAMELEN + 1]; /* one for newline */
152 char realm[REALM_SZ], server[MAXHOSTNAMELEN + 1];
155 if (!(fp = fopen(file, "r")))
156 return((ZRealmname *)0);
158 /* start with 16, realloc if necessary */
160 rlm_list = (ZRealmname *)malloc(ntotal * sizeof(ZRealmname));
162 syslog(LOG_CRIT, "get_realm_lists malloc");
166 while (fgets(buf, REALM_SZ + MAXHOSTNAMELEN + 1, fp)) {
167 if (sscanf(buf, "%s %s", realm, server) != 2) {
168 syslog(LOG_CRIT, "bad format in %s", file);
171 for (ii = 0; ii < nused; ii++) {
172 /* look for this realm */
173 if (!strcmp(rlm_list[ii].name, realm))
178 if (rlm->nused +1 >= rlm->nservers) {
179 /* make more space */
180 rlm->servers = (char **)realloc((char *)rlm->servers,
181 (unsigned)rlm->nservers * 2 *
184 syslog(LOG_CRIT, "get_realm_lists realloc");
189 rlm->servers[rlm->nused++] = strsave(server);
192 if (nused + 1 >= ntotal) {
193 /* make more space */
194 rlm_list = (ZRealmname *)realloc((char *)rlm_list,
195 (unsigned)ntotal * 2 *
198 syslog(LOG_CRIT, "get_realm_lists realloc");
203 rlm = &rlm_list[nused++];
204 strcpy(rlm->name, realm);
207 rlm->servers = (char **)malloc(rlm->nservers * sizeof(char *));
209 syslog(LOG_CRIT, "get_realm_lists malloc");
212 rlm->servers[rlm->nused++] = strsave(server);
215 if (nused + 1 >= ntotal) {
216 rlm_list = (ZRealmname *)realloc((char *)rlm_list,
217 (unsigned)(ntotal + 1) *
220 syslog(LOG_CRIT, "get_realm_lists realloc");
224 *rlm_list[nused].name = '\0';
231 realm_send_realms(void)
234 for (cnt = 0; cnt < nrealms; cnt++) {
235 retval = subscr_send_realm_subs(&otherrealms[cnt]);
236 if (retval != ZERR_NONE)
243 realm_bound_for_realm(char *realm, char *recip)
246 int remote = strcmp(ZGetRealm(), realm);
249 rlm = strchr(recip, '@');
254 if (rlm && strcmp(realm_expand_realm(rlm + 1), realm) == 0)
261 realm_sender_in_realm(char *realm, char *sender)
264 int remote = strcmp(ZGetRealm(), realm);
267 rlm = strchr(sender, '@');
272 if (rlm && strcmp((rlm + 1), realm) == 0)
278 int sender_in_realm(ZNotice_t *notice)
282 realm = strchr(notice->z_sender, '@');
284 if (!realm || !strcmp(realm + 1, ZGetRealm()))
291 realm_which_realm(struct sockaddr_in *who)
294 struct sockaddr_in *addr;
297 if (who->sin_port != srv_addr.sin_port)
300 /* loop through the realms */
301 for (realm = otherrealms, a = 0; a < nrealms; a++, realm++)
302 /* loop through the addresses for the realm */
303 for (addr = realm->addrs, b = 0; b < realm->count; b++, addr++)
304 if (addr->sin_addr.s_addr == who->sin_addr.s_addr)
311 realm_get_realm_by_name(char *name)
316 /* First, look for an exact match (case insensitive) */
317 for (realm = otherrealms, a = 0; a < nrealms; a++, realm++)
318 if (!strcasecmp(realm->name, name))
321 /* Failing that, look for an inexact match */
322 for (realm = otherrealms, a = 0; a < nrealms; a++, realm++)
323 if (!strncasecmp(realm->name, name, strlen(name)))
330 rlm_nack_cancel(register ZNotice_t *notice,
331 struct sockaddr_in *who)
333 register ZRealm *which = realm_which_realm(who);
334 register Unacked *nacked;
336 zdbug((LOG_DEBUG, "rlm_nack_cancel: %s:%08X,%08X",
337 inet_ntoa(notice->z_uid.zuid_addr),
338 notice->z_uid.tv.tv_sec, notice->z_uid.tv.tv_usec));
341 syslog(LOG_ERR, "non-realm ack?");
345 for (nacked = rlm_nacklist; nacked; nacked = nacked->next) {
346 if (&otherrealms[nacked->dest.rlm.rlm_idx] == which) {
347 /* First, note the realm appears to be up */
348 which->state = REALM_UP;
349 if (ZCompareUID(&nacked->uid, ¬ice->z_uid)) {
350 timer_reset(nacked->timer);
352 if (nacked->ack_addr.sin_addr.s_addr)
353 rlm_ack(notice, nacked);
356 free(nacked->packet);
357 Unacked_delete(nacked);
367 rlm_ack(ZNotice_t *notice,
375 /* tell the original sender the result */
377 acknotice.z_message_len = strlen(acknotice.z_message) + 1;
379 packlen = sizeof(ackpack);
381 if ((retval = ZFormatSmallRawNotice(&acknotice, ackpack, &packlen))
383 syslog(LOG_ERR, "rlm_ack format: %s",
384 error_message(retval));
387 zdbug((LOG_DEBUG, "rlm_ack sending to %s/%d",
388 inet_ntoa(nacked->ack_addr.sin_addr),
389 ntohs(nacked->ack_addr.sin_port)));
390 if ((retval = ZSetDestAddr(&nacked->ack_addr)) != ZERR_NONE) {
391 syslog(LOG_WARNING, "rlm_ack set addr: %s",
392 error_message(retval));
395 if ((retval = ZSendPacket(ackpack, packlen, 0)) != ZERR_NONE) {
396 syslog(LOG_WARNING, "rlm_ack xmit: %s", error_message(retval));
402 realm_dispatch(ZNotice_t *notice,
404 struct sockaddr_in *who,
408 struct sockaddr_in newwho;
409 Code_t status = ZERR_NONE;
410 char rlm_recipient[REALM_SZ + 1];
412 String *notice_class;
414 if (notice->z_kind == SERVACK || notice->z_kind == SERVNAK) {
415 rlm_nack_cancel(notice, who);
418 /* set up a who for the real origin */
419 memset((caddr_t) &newwho, 0, sizeof(newwho));
420 newwho.sin_family = AF_INET;
421 newwho.sin_addr.s_addr = notice->z_sender_addr.s_addr;
422 newwho.sin_port = hm_port;
424 /* check if it's a control message */
425 realm = realm_which_realm(who);
427 notice_class = make_string(notice->z_class,1);
429 if (class_is_admin(notice_class)) {
430 syslog(LOG_WARNING, "%s sending admin opcode %s",
431 realm->name, notice->z_opcode);
432 } else if (class_is_hm(notice_class)) {
433 syslog(LOG_WARNING, "%s sending hm opcode %s",
434 realm->name, notice->z_opcode);
435 } else if (class_is_control(notice_class)) {
436 status = realm_control_dispatch(notice, auth, who,
438 } else if (class_is_ulogin(notice_class)) {
439 /* don't need to forward this */
440 if (server == me_server) {
441 sprintf(rlm_recipient, "@%s", realm->name);
442 notice->z_recipient = rlm_recipient;
444 sendit(notice, 1, who, 0);
446 } else if (class_is_ulocate(notice_class)) {
447 status = realm_ulocate_dispatch(notice, auth, who, server, realm);
449 /* redo the recipient */
450 if (*notice->z_recipient == '\0') {
451 sprintf(rlm_recipient, "@%s", realm->name);
452 notice->z_recipient = rlm_recipient;
454 } else if (realm_bound_for_realm(ZGetRealm(), notice->z_recipient)
455 && *notice->z_recipient == '@')
457 /* we're responsible for getting this message out */
459 notice->z_recipient = "";
462 /* otherwise, send to local subscribers */
463 sendit(notice, auth, who, external);
473 ZRealmname *rlmnames;
476 struct in_addr *addresses;
479 char rlmprinc[ANAME_SZ+INST_SZ+REALM_SZ+3];
481 sprintf(list_file, "%s/zephyr/%s", SYSCONFDIR, REALM_LIST_FILE);
482 rlmnames = get_realm_lists(list_file);
484 zdbug((LOG_DEBUG, "No other realms"));
489 for (nrealms = 0; *rlmnames[nrealms].name; nrealms++);
491 otherrealms = (ZRealm *)malloc(nrealms * sizeof(ZRealm));
493 syslog(LOG_CRIT, "malloc failed in realm_init");
497 for (ii = 0; ii < nrealms; ii++) {
498 rlm = &otherrealms[ii];
499 strcpy(rlm->name, rlmnames[ii].name);
501 addresses = (struct in_addr *)malloc(rlmnames[ii].nused *
502 sizeof(struct in_addr));
504 syslog(LOG_CRIT, "malloc failed in realm_init");
507 /* convert names to addresses */
509 for (jj = 0; jj < rlmnames[ii].nused; jj++) {
510 hp = gethostbyname(rlmnames[ii].servers[jj]);
512 memmove((caddr_t) &addresses[found], (caddr_t)hp->h_addr,
513 sizeof(struct in_addr));
516 syslog(LOG_WARNING, "hostname failed, %s",
517 rlmnames[ii].servers[jj]);
518 /* free the hostname */
519 free(rlmnames[ii].servers[jj]);
522 rlm->addrs = (struct sockaddr_in *)malloc(found *
523 sizeof (struct sockaddr_in));
525 syslog(LOG_CRIT, "malloc failed in realm_init");
528 for (jj = 0; jj < rlm->count; jj++) {
529 rlm->addrs[jj].sin_family = AF_INET;
530 /* use the server port */
531 rlm->addrs[jj].sin_port = srv_addr.sin_port;
532 rlm->addrs[jj].sin_addr = addresses[jj];
534 client = (Client *) malloc(sizeof(Client));
536 syslog(LOG_CRIT, "malloc failed in realm_init");
539 memset(&client->addr, 0, sizeof(struct sockaddr_in));
541 client->session_keyblock = NULL;
544 memset(&client->session_key, 0, sizeof(client->session_key));
547 sprintf(rlmprinc, "%s.%s@%s", SERVER_SERVICE, SERVER_INSTANCE,
549 client->principal = make_string(rlmprinc, 0);
550 client->last_send = 0;
551 client->last_ack = NOW;
554 client->addr.sin_family = 0;
555 client->addr.sin_port = 0;
556 client->addr.sin_addr.s_addr = 0;
558 rlm->client = client;
559 rlm->idx = (rlm->count) ? random() % rlm->count : 0;
563 /* Assume the best */
564 rlm->state = REALM_TARDY;
566 free(rlmnames[ii].servers);
573 realm_deathgram(Server *server)
578 /* Get it out once, and assume foreign servers will share */
579 for (realm = otherrealms, jj = 0; jj < nrealms; jj++, realm++) {
582 char rlm_recipient[REALM_SZ + 1];
585 memset (&snotice, 0, sizeof (snotice));
587 snotice.z_kind = ACKED;
588 snotice.z_port = srv_addr.sin_port;
589 snotice.z_class = ZEPHYR_CTL_CLASS;
590 snotice.z_class_inst = ZEPHYR_CTL_REALM;
591 snotice.z_opcode = SERVER_SHUTDOWN;
592 snotice.z_sender = myname; /* my host name */
593 sprintf(rlm_recipient, "@%s", realm->name);
594 snotice.z_recipient = rlm_recipient;
595 snotice.z_default_format = "";
596 snotice.z_num_other_fields = 0;
597 snotice.z_default_format = "";
598 snotice.z_message = (server) ? server->addr_str : NULL;
599 snotice.z_message_len = (server) ? strlen(server->addr_str) + 1 : 0;
601 zdbug((LOG_DEBUG, "rlm_deathgram: suggesting %s to %s",
602 (server) ? server->addr_str : "nothing", realm->name));
605 if (!ticket_lookup(realm->name))
606 if ((retval = ticket_retrieve(realm)) != ZERR_NONE) {
607 syslog(LOG_WARNING, "rlm_deathgram failed: %s",
608 error_message(retval));
613 if ((retval = ZFormatNotice(&snotice, &pack, &packlen, ZCAUTH))
616 syslog(LOG_WARNING, "rlm_deathgram format: %s",
617 error_message(retval));
620 if ((retval = ZParseNotice(pack, packlen, &snotice)) != ZERR_NONE) {
621 syslog(LOG_WARNING, "rlm_deathgram parse: %s",
622 error_message(retval));
627 realm_handoff(&snotice, 1, NULL, realm, 0);
638 for (jj = 1; jj < nservers; jj++) { /* skip limbo server */
639 if (jj != me_server_idx && otherservers[jj].state == SERV_UP)
643 if (nservers < 2 || !found) {
644 /* if we're the only server up, send a REALM_BOOT to one of their
646 for (realm = otherrealms, jj = 0; jj < nrealms; jj++, realm++) {
649 char rlm_recipient[REALM_SZ + 1];
652 memset (&snotice, 0, sizeof (snotice));
654 snotice.z_opcode = REALM_BOOT;
655 snotice.z_port = srv_addr.sin_port;
656 snotice.z_class_inst = ZEPHYR_CTL_REALM;
657 snotice.z_class = ZEPHYR_CTL_CLASS;
658 snotice.z_recipient = "";
659 snotice.z_kind = ACKED;
660 snotice.z_num_other_fields = 0;
661 snotice.z_default_format = "";
662 snotice.z_sender = myname; /* my host name */
663 sprintf(rlm_recipient, "@%s", realm->name);
664 snotice.z_recipient = rlm_recipient;
665 snotice.z_default_format = "";
666 snotice.z_message = NULL;
667 snotice.z_message_len = 0;
670 if (!ticket_lookup(realm->name))
671 if ((retval = ticket_retrieve(realm)) != ZERR_NONE) {
672 syslog(LOG_WARNING, "rlm_wakeup failed: %s",
673 error_message(retval));
678 if ((retval = ZFormatNotice(&snotice, &pack, &packlen, ZAUTH))
681 syslog(LOG_WARNING, "rlm_wakeup format: %s",
682 error_message(retval));
685 if ((retval = ZParseNotice(pack, packlen, &snotice))
687 syslog(LOG_WARNING, "rlm_wakeup parse: %s",
688 error_message(retval));
693 realm_handoff(&snotice, 1, NULL, realm, 0);
700 realm_ulocate_dispatch(ZNotice_t *notice,
702 struct sockaddr_in *who,
706 register char *opcode = notice->z_opcode;
709 syslog(LOG_WARNING, "unauth locate msg from %s (%s/%s/%s)",
710 inet_ntoa(who->sin_addr),
711 notice->z_class, notice->z_class_inst,
712 notice->z_opcode); /* XXX */
713 clt_ack(notice, who, AUTH_FAILED);
717 if (!strcmp(opcode, REALM_REQ_LOCATE)) {
719 ulogin_realm_locate(notice, who, realm);
720 } else if (!strcmp(opcode, REALM_ANS_LOCATE)) {
722 ulogin_relay_locate(notice, who);
724 syslog(LOG_WARNING, "%s unknown/illegal loc opcode %s",
725 realm->name, opcode);
734 realm_control_dispatch(ZNotice_t *notice,
736 struct sockaddr_in *who,
740 register char *opcode = notice->z_opcode;
744 syslog(LOG_WARNING, "unauth ctl msg from %s (%s/%s/%s)",
745 inet_ntoa(who->sin_addr),
746 notice->z_class, notice->z_class_inst,
747 notice->z_opcode); /* XXX */
748 if (server == me_server)
749 clt_ack(notice, who, AUTH_FAILED);
753 if (strcmp(notice->z_class_inst, ZEPHYR_CTL_REALM)) {
754 syslog(LOG_WARNING, "Invalid rlm_dispatch instance %s",
755 notice->z_class_inst);
759 if (!strcmp(opcode, REALM_REQ_SUBSCRIBE) || !strcmp(opcode, REALM_ADD_SUBSCRIBE)) {
760 /* try to add subscriptions */
761 /* attempts to get defaults are ignored */
762 if ((status = subscr_foreign_user(notice, who, server, realm)) != ZERR_NONE) {
763 clt_ack(notice, who, AUTH_FAILED);
764 } else if (server == me_server) {
765 server_forward(notice, auth, who);
768 } else if (!strcmp(opcode, REALM_UNSUBSCRIBE)) {
769 /* try to remove subscriptions */
770 if ((status = subscr_realm_cancel(who, notice, realm)) != ZERR_NONE) {
771 clt_ack(notice, who, NOT_FOUND);
772 } else if (server == me_server) {
773 server_forward(notice, auth, who);
776 } else if (!strcmp(opcode, REALM_BOOT)) {
777 zdbug((LOG_DEBUG, "got a REALM_BOOT from %d (me %d)", server, me_server));
778 realm->state = REALM_STARTING;
779 realm_set_server(who, realm);
781 /* resend subscriptions but only if this was to us */
782 if (server == me_server) {
783 if ((status = subscr_realm_subs(realm)) != ZERR_NONE) {
784 clt_ack(notice, who, NOT_FOUND);
786 /* do forward the hint in case it ever matters */
787 server_forward(notice, auth, who);
792 } else if (!strcmp(opcode, SERVER_SHUTDOWN)) {
793 /* try to remove subscriptions */
794 if ((status = realm_new_server(who, notice, realm)) != ZERR_NONE) {
795 clt_ack(notice, who, NOT_FOUND);
796 } else if (server == me_server) {
797 server_forward(notice, auth, who);
801 syslog(LOG_WARNING, "%s unknown/illegal ctl opcode %s",
802 realm->name, opcode);
803 if (server == me_server)
811 realm_new_server(struct sockaddr_in *sin,
817 struct sockaddr_in sinaddr;
823 srvidx = realm_get_idx_by_addr(realm, sin);
824 zdbug((LOG_DEBUG, "rlm_new_srv: message from %d in %s (%s)",
825 srvidx, realm->name, inet_ntoa(sin->sin_addr)));
826 if (realm->idx == srvidx) {
827 if (notice->z_message_len) {
828 addr = inet_addr(notice->z_message);
829 sinaddr.sin_addr.s_addr = addr;
830 rlm = realm_which_realm(&sinaddr);
832 if (!rlm || (rlm != realm))
834 realm->idx = realm_get_idx_by_addr(realm, &sinaddr);
836 realm->idx = (realm->idx + 1) % realm->count;
838 zdbug((LOG_DEBUG, "rlm_new_srv: switched servers (%s)", inet_ntoa((realm->addrs[realm->idx]).sin_addr)));
840 zdbug((LOG_DEBUG, "rlm_new_srv: not switching servers (%s)", inet_ntoa((realm->addrs[realm->idx]).sin_addr)));
846 realm_set_server(struct sockaddr_in *sin,
851 rlm = realm_which_realm(sin);
853 if (!rlm || (rlm != realm))
855 realm->idx = realm_get_idx_by_addr(realm, sin);
856 zdbug((LOG_DEBUG, "rlm_pick_srv: switched servers (%s)", inet_ntoa((realm->addrs[realm->idx]).sin_addr)));
862 realm_handoff(ZNotice_t *notice,
864 struct sockaddr_in *who,
872 zdbug((LOG_DEBUG, "realm_sendit unauthentic to realm %s",
874 realm_sendit(notice, who, auth, realm, ack_to_sender);
878 if (!ticket_lookup(realm->name))
879 if ((retval = ticket_retrieve(realm)) != ZERR_NONE) {
880 syslog(LOG_WARNING, "rlm_handoff failed: %s",
881 error_message(retval));
882 realm_sendit(notice, who, auth, realm, ack_to_sender);
886 zdbug((LOG_DEBUG, "realm_sendit to realm %s auth %d", realm->name, auth));
887 /* valid ticket available now, send the message */
888 retval = realm_sendit_auth(notice, who, auth, realm, ack_to_sender);
889 #else /* HAVE_KRB4 */
890 realm_sendit(notice, who, auth, realm, ack_to_sender);
891 #endif /* HAVE_KRB4 */
895 realm_sendit(ZNotice_t *notice,
896 struct sockaddr_in *who,
906 notice->z_auth = auth;
908 /* format the notice */
909 if ((retval = ZFormatRawNotice(notice, &pack, &packlen)) != ZERR_NONE) {
910 syslog(LOG_WARNING, "rlm_sendit format: %s",
911 error_message(retval));
916 if ((retval = ZSetDestAddr(&realm->addrs[realm->idx])) != ZERR_NONE) {
917 syslog(LOG_WARNING, "rlm_sendit set addr: %s",
918 error_message(retval));
922 if ((retval = ZSendPacket(pack, packlen, 0)) != ZERR_NONE) {
923 syslog(LOG_WARNING, "rlm_sendit xmit: %s", error_message(retval));
928 /* now we've sent it, mark it as not ack'ed */
930 if (!(nacked = (Unacked *)malloc(sizeof(Unacked)))) {
931 /* no space: just punt */
932 syslog(LOG_ERR, "rlm_sendit nack malloc");
937 nacked->client = NULL;
939 nacked->packet = pack;
940 nacked->dest.rlm.rlm_idx = realm - otherrealms;
941 nacked->dest.rlm.rlm_srv_idx = realm->idx;
942 nacked->packsz = packlen;
943 nacked->uid = notice->z_uid;
945 nacked->ack_addr = *who;
947 nacked->ack_addr.sin_addr.s_addr = 0;
949 /* set a timer to retransmit */
950 nacked->timer = timer_set_rel(rexmit_times[0], rlm_rexmit, nacked);
952 Unacked_insert(&rlm_nacklist, nacked);
957 packet_ctl_nack(Unacked *nackpacket)
961 /* extract the notice */
962 ZParseNotice(nackpacket->packet, nackpacket->packsz, ¬ice);
963 if (nackpacket->ack_addr.sin_addr.s_addr != 0)
964 nack(¬ice, &nackpacket->ack_addr);
966 syslog(LOG_WARNING, "would have acked nobody (%s/%s/%s)",
967 notice.z_class, notice.z_class_inst, notice.z_opcode); /* XXX */
971 rlm_rexmit(void *arg)
973 Unacked *nackpacket = (Unacked *) arg;
975 register ZRealm *realm;
977 zdbug((LOG_DEBUG,"rlm_rexmit"));
979 realm = &otherrealms[nackpacket->dest.rlm.rlm_idx];
981 zdbug((LOG_DEBUG, "rlm_rexmit: sending to %s:%d (%d)",
982 realm->name, realm->idx, nackpacket->rexmits));
984 if (realm->count == 0)
987 /* Check to see if we've retransmitted as many times as we can */
988 if (nackpacket->rexmits >= (NUM_REXMIT_TIMES * realm->count)) {
989 /* give a server ack that the packet is lost/realm dead */
990 packet_ctl_nack(nackpacket);
991 Unacked_delete(nackpacket);
993 zdbug((LOG_DEBUG, "rlm_rexmit: %s appears dead", realm->name));
994 realm->state = REALM_DEAD;
996 free(nackpacket->packet);
1001 /* if we've reached our limit, move on to the next server */
1002 if ((realm->state == REALM_TARDY) ||
1003 (nackpacket->rexmits &&
1004 !((nackpacket->rexmits+1) % (NUM_REXMIT_TIMES/3))))
1006 realm->idx = (realm->idx + 1) % realm->count;
1007 zdbug((LOG_DEBUG, "rlm_rexmit: %s switching servers:%d (%s)",
1008 realm->name, realm->idx,
1009 inet_ntoa((realm->addrs[realm->idx]).sin_addr)));
1012 /* throttle back if it looks like the realm is down */
1013 if ((realm->state != REALM_DEAD) ||
1014 ((nackpacket->rexmits % (realm->count+1)) == 1)) {
1015 /* do the retransmit */
1016 retval = ZSetDestAddr(&realm->addrs[realm->idx]);
1017 if (retval != ZERR_NONE) {
1018 syslog(LOG_WARNING, "rlm_rexmit set addr: %s",
1019 error_message(retval));
1021 retval = ZSendPacket(nackpacket->packet, nackpacket->packsz, 0);
1022 if (retval != ZERR_NONE)
1023 syslog(LOG_WARNING, "rlm_rexmit xmit: %s",
1024 error_message(retval));
1026 /* no per-server nack queues for foreign realms yet, doesn't matter */
1027 nackpacket->dest.rlm.rlm_srv_idx = realm->idx;
1028 zdbug((LOG_DEBUG, "rlm_rexmit(%s): send to %s", realm->name,
1029 inet_ntoa((realm->addrs[realm->idx]).sin_addr)));
1031 zdbug((LOG_DEBUG, "rlm_rexmit(%s): not sending to %s", realm->name,
1032 inet_ntoa((realm->addrs[realm->idx]).sin_addr)));
1035 /* reset the timer */
1036 nackpacket->rexmits++;
1038 timer_set_rel(rexmit_times[nackpacket->rexmits%NUM_REXMIT_TIMES],
1039 rlm_rexmit, nackpacket);
1040 if (rexmit_times[nackpacket->rexmits%NUM_REXMIT_TIMES] == -1)
1041 zdbug((LOG_DEBUG, "rlm_rexmit(%s): would send at -1 to %s",
1042 realm->name, inet_ntoa((realm->addrs[realm->idx]).sin_addr)));
1048 realm_dump_realms(FILE *fp)
1050 register int ii, jj;
1052 for (ii = 0; ii < nrealms; ii++) {
1053 (void) fprintf(fp, "%d:%s\n", ii, otherrealms[ii].name);
1054 for (jj = 0; jj < otherrealms[ii].count; jj++) {
1055 (void) fprintf(fp, "\t%s\n",
1056 inet_ntoa(otherrealms[ii].addrs[jj].sin_addr));
1059 subscr_dump_subs(fp, otherrealms[ii].subs);
1065 realm_sendit_auth(ZNotice_t *notice,
1066 struct sockaddr_in *who,
1072 int buffer_len, hdrlen, offset, fragsize, message_len;
1073 int origoffset, origlen;
1077 ZNotice_t partnotice, newnotice;
1081 buffer = (char *) malloc(sizeof(ZPacket_t));
1083 syslog(LOG_ERR, "realm_sendit_auth malloc");
1084 return ENOMEM; /* DON'T put on nack list */
1087 buffer_len = sizeof(ZPacket_t);
1089 newnotice = *notice;
1092 retval = ZMakeZcodeRealmAuthentication(&newnotice, buffer, buffer_len,
1093 &hdrlen, realm->name);
1094 if (retval != ZERR_NONE) {
1095 syslog(LOG_WARNING, "rlm_sendit_auth make zcksum: %s",
1096 error_message(retval));
1100 /* set the dest addr */
1101 retval = ZSetDestAddr(&realm->addrs[realm->idx]);
1102 if (retval != ZERR_NONE) {
1103 syslog(LOG_WARNING, "rlm_sendit_auth set addr: %s",
1104 error_message(retval));
1108 /* This is not terribly pretty, but it does do its job.
1109 * If a packet we get that needs to get sent off to another realm is
1110 * too big after we slap on our authent, we refragment it further,
1111 * a la Z_SendFragmentedNotice. This obviates the need for what
1112 * used to be done in ZFormatAuthenticRealmNotice, as we do it here.
1113 * At some point it should be pulled back out into its own function,
1114 * but only the server uses it.
1117 if ((notice->z_message_len+hdrlen > buffer_len) ||
1118 (notice->z_message_len+hdrlen > Z_MAXPKTLEN)) {
1120 /* Reallocate buffers inside the refragmenter */
1123 partnotice = *notice;
1126 origlen = notice->z_message_len;
1128 if (notice->z_multinotice && strcmp(notice->z_multinotice, ""))
1129 if (sscanf(notice->z_multinotice, "%d/%d", &origoffset,
1131 syslog(LOG_WARNING, "rlm_sendit_auth frag: parse failed");
1132 return ZERR_BADFIELD;
1135 fragsize = Z_MAXPKTLEN-hdrlen-Z_FRAGFUDGE;
1137 while (offset < notice->z_message_len || !notice->z_message_len) {
1138 (void) sprintf(multi, "%d/%d", offset+origoffset, origlen);
1139 partnotice.z_multinotice = multi;
1141 (void) Z_gettimeofday(&partnotice.z_uid.tv,
1142 (struct timezone *)0);
1143 partnotice.z_uid.tv.tv_sec = htonl((u_long)
1144 partnotice.z_uid.tv.tv_sec);
1145 partnotice.z_uid.tv.tv_usec =
1146 htonl((u_long) partnotice.z_uid.tv.tv_usec);
1147 (void) memcpy((char *)&partnotice.z_uid.zuid_addr, &__My_addr,
1150 message_len = min(notice->z_message_len-offset, fragsize);
1151 partnotice.z_message = notice->z_message+offset;
1152 partnotice.z_message_len = message_len;
1154 buffer = (char *) malloc(sizeof(ZPacket_t));
1156 syslog(LOG_ERR, "realm_sendit_auth malloc");
1157 return ENOMEM; /* DON'T put on nack list */
1160 buffer_len = sizeof(ZPacket_t);
1162 retval = ZMakeZcodeRealmAuthentication(&partnotice, buffer,
1163 buffer_len, &hdrlen,
1165 if (retval != ZERR_NONE) {
1166 syslog(LOG_WARNING, "rlm_sendit_auth set addr: %s",
1167 error_message(retval));
1172 ptr = buffer+hdrlen;
1174 (void) memcpy(ptr, partnotice.z_message, partnotice.z_message_len);
1176 buffer_len = hdrlen+partnotice.z_message_len;
1179 if ((retval = ZSendPacket(buffer, buffer_len, 0)) != ZERR_NONE) {
1180 syslog(LOG_WARNING, "rlm_sendit_auth xmit: %s",
1181 error_message(retval));
1186 if (!(nacked = (Unacked *)malloc(sizeof(Unacked)))) {
1187 /* no space: just punt */
1188 syslog(LOG_ERR, "rlm_sendit_auth nack malloc");
1193 nacked->rexmits = 0;
1194 nacked->packet = buffer;
1195 nacked->dest.rlm.rlm_idx = realm - otherrealms;
1196 nacked->dest.rlm.rlm_srv_idx = realm->idx;
1197 nacked->packsz = buffer_len;
1198 nacked->uid = partnotice.z_uid;
1200 /* Do the ack for the last frag, below */
1202 nacked->ack_addr = *who;
1204 nacked->ack_addr.sin_addr.s_addr = 0;
1206 /* set a timer to retransmit */
1207 nacked->timer = timer_set_rel(rexmit_times[0], rlm_rexmit, nacked);
1210 Unacked_insert(&rlm_nacklist, nacked);
1214 if (!notice->z_message_len)
1219 /* This is easy, no further fragmentation needed */
1220 ptr = buffer+hdrlen;
1222 (void) memcpy(ptr, newnotice.z_message, newnotice.z_message_len);
1224 buffer_len = hdrlen+newnotice.z_message_len;
1227 if ((retval = ZSendPacket(buffer, buffer_len, 0)) != ZERR_NONE) {
1228 syslog(LOG_WARNING, "rlm_sendit_auth xmit: %s",
1229 error_message(retval));
1234 /* now we've sent it, mark it as not ack'ed */
1236 if (!(nacked = (Unacked *)malloc(sizeof(Unacked)))) {
1237 /* no space: just punt */
1238 syslog(LOG_ERR, "rlm_sendit_auth nack malloc");
1243 nacked->rexmits = 0;
1244 nacked->packet = buffer;
1245 nacked->dest.rlm.rlm_idx = realm - otherrealms;
1246 nacked->dest.rlm.rlm_srv_idx = realm->idx;
1247 nacked->packsz = buffer_len;
1248 nacked->uid = notice->z_uid;
1250 /* Do the ack for the last frag, below */
1252 nacked->ack_addr = *who;
1254 nacked->ack_addr.sin_addr.s_addr = 0;
1256 /* set a timer to retransmit */
1257 nacked->timer = timer_set_rel(rexmit_times[0], rlm_rexmit, nacked);
1259 Unacked_insert(&rlm_nacklist, nacked);
1265 ticket_lookup(char *realm)
1267 krb5_error_code result;
1270 krb5_creds creds_in, *creds;
1272 result = krb5_cc_default(Z_krb5_ctx, &ccache);
1276 memset(&creds_in, 0, sizeof(creds_in));
1278 result = krb5_cc_get_principal(Z_krb5_ctx, ccache, &creds_in.client);
1280 krb5_cc_close(Z_krb5_ctx, ccache);
1284 result = krb5_build_principal(Z_krb5_ctx, &creds_in.server,
1287 SERVER_KRB5_SERVICE, SERVER_INSTANCE, 0);
1289 krb5_cc_close(Z_krb5_ctx, ccache);
1293 result = krb5_get_credentials(Z_krb5_ctx, 0 /* flags */, ccache,
1295 krb5_cc_close(Z_krb5_ctx, ccache);
1298 krb5_timeofday (Z_krb5_ctx, &sec);
1299 krb5_free_cred_contents(Z_krb5_ctx, &creds_in); /* hope this is OK */
1300 if ((result == 0) && (sec < creds->times.endtime)) {
1301 krb5_free_creds(Z_krb5_ctx, creds);
1304 if (!result) krb5_free_creds(Z_krb5_ctx, creds);
1310 ticket_retrieve(ZRealm *realm)
1314 krb5_error_code result;
1315 krb5_creds creds_in, *creds;
1319 if (realm->child_pid)
1320 /* Right idea. Basically, we haven't gotten it yet */
1321 return KRB5KRB_AP_ERR_TKT_EXPIRED;
1323 if (realm->have_tkt) {
1324 /* Get a pointer to the default ccache. We don't need to free this. */
1325 result = krb5_cc_default(Z_krb5_ctx, &ccache);
1327 /* GRRR. There's no allocator or constructor for krb5_creds */
1328 /* GRRR. It would be nice if this API were documented at all */
1329 memset(&creds_in, 0, sizeof(creds_in));
1332 result = krb5_cc_get_principal(Z_krb5_ctx, ccache, &creds_in.client);
1333 /* construct the service principal */
1335 result = krb5_build_principal(Z_krb5_ctx, &creds_in.server,
1336 strlen(realm->name), realm->name,
1337 SERVER_KRB5_SERVICE, SERVER_INSTANCE,
1340 /* HOLDING: creds_in.server */
1342 /* look up or get the credentials we need */
1344 result = krb5_get_credentials(Z_krb5_ctx, 0 /* flags */, ccache,
1346 krb5_cc_close(Z_krb5_ctx, ccache);
1347 krb5_free_cred_contents(Z_krb5_ctx, &creds_in); /* hope this is OK */
1349 krb5_free_creds(Z_krb5_ctx, creds);
1353 syslog(LOG_ERR, "tkt_rtrv: don't have ticket, but have no child");
1354 result = KRB5KRB_AP_ERR_TKT_EXPIRED;
1359 syslog(LOG_ERR, "tkt_rtrv: can't fork");
1360 return KRBET_KDC_AUTH_EXP;
1362 else if (pid == 0) {
1363 #ifdef _POSIX_VERSION
1364 struct sigaction action;
1366 action.sa_flags = 0;
1367 sigemptyset(&action.sa_mask);
1368 action.sa_handler = 0;
1369 sigaction(SIGCHLD, &action, NULL);
1370 sigaction(SIGINT, &action, NULL);
1371 sigaction(SIGTERM, &action, NULL);
1372 sigaction(SIGUSR1, &action, NULL);
1373 sigaction(SIGUSR2, &action, NULL);
1374 sigaction(SIGFPE, &action, NULL);
1375 sigaction(SIGHUP, &action, NULL);
1377 sigaction(SIGEMT, &action, NULL);
1380 signal(SIGCHLD, SIG_DFL);
1381 signal(SIGINT, SIG_DFL);
1382 signal(SIGTERM, SIG_DFL);
1383 signal(SIGUSR1, SIG_DFL);
1384 signal(SIGUSR2, SIG_DFL);
1385 signal(SIGFPE, SIG_DFL);
1386 signal(SIGHUP, SIG_DFL);
1388 signal(SIGEMT, SIG_DFL);
1392 syslog(LOG_INFO, "tkt_rtrv running for %s", realm->name);
1394 /* Get a pointer to the default ccache. We don't need to free this. */
1395 result = krb5_cc_default(Z_krb5_ctx, &ccache);
1397 /* GRRR. There's no allocator or constructor for krb5_creds */
1398 /* GRRR. It would be nice if this API were documented at all */
1399 memset(&creds_in, 0, sizeof(creds_in));
1402 result = krb5_cc_get_principal(Z_krb5_ctx, ccache, &creds_in.client);
1403 /* construct the service principal */
1405 result = krb5_build_principal(Z_krb5_ctx, &creds_in.server,
1406 strlen(realm->name), realm->name,
1407 SERVER_KRB5_SERVICE, SERVER_INSTANCE,
1410 /* HOLDING: creds_in.server */
1412 /* look up or get the credentials we need */
1414 result = krb5_get_credentials(Z_krb5_ctx, 0 /* flags */, ccache,
1416 krb5_cc_close(Z_krb5_ctx, ccache);
1417 krb5_free_cred_contents(Z_krb5_ctx, &creds_in); /* hope this is OK */
1419 krb5_free_creds(Z_krb5_ctx, creds);
1420 syslog(LOG_INFO, "tkt_rtrv succeeded for %s", realm->name);
1424 /* Sleep a little while before retrying */
1428 realm->child_pid = pid;
1429 realm->have_tkt = 0;
1431 syslog(LOG_WARNING, "tkt_rtrv: %s: %d", realm->name,
1436 #endif /* HAVE_KRB5 */