5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2005 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
21 #include "serverincludes.h"
22 #include "server_internal.h"
24 extern char *server_version;
26 /* Removes the client from channels and possibly removes the channels
27 as well. After removing those channels that exist, their channel
28 keys are regnerated. This is called only by the function
29 silc_server_remove_clients_by_server. */
32 silc_server_remove_clients_channels(SilcServer server,
33 SilcServerEntry server_entry,
34 SilcHashTable clients,
35 SilcClientEntry client,
36 SilcHashTable channels)
38 SilcChannelEntry channel;
39 SilcChannelClientEntry chl, chl2;
40 SilcHashTableList htl, htl2;
45 SILC_LOG_DEBUG(("Remove client %s from all channels",
46 client->nickname ? client->nickname :
47 (unsigned char *)""));
49 if (silc_hash_table_find(clients, client, NULL, NULL))
50 silc_hash_table_del(clients, client);
52 /* Remove the client from all channels. The client is removed from
53 the channels' user list. */
54 silc_hash_table_list(client->channels, &htl);
55 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
56 channel = chl->channel;
58 /* Remove channel if this is last client leaving the channel, unless
59 the channel is permanent. */
60 if (server->server_type != SILC_SERVER &&
61 silc_hash_table_count(channel->user_list) < 2) {
62 if (silc_hash_table_find(channels, channel, NULL, NULL))
63 silc_hash_table_del(channels, channel);
64 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
65 silc_server_channel_delete(server, channel);
69 silc_hash_table_del(client->channels, channel);
70 silc_hash_table_del(channel->user_list, chl->client);
71 channel->user_count--;
73 /* If there is no global users on the channel anymore mark the channel
74 as local channel. Do not check if the removed client is local client. */
75 if (server->server_type != SILC_ROUTER && channel->global_users &&
76 chl->client->router && !silc_server_channel_has_global(channel))
77 channel->global_users = FALSE;
81 /* Update statistics */
82 if (SILC_IS_LOCAL(client))
83 server->stat.my_chanclients--;
84 if (server->server_type == SILC_ROUTER) {
85 server->stat.cell_chanclients--;
86 server->stat.chanclients--;
89 /* If there is not at least one local user on the channel then we don't
90 need the channel entry anymore, we can remove it safely, unless the
91 channel is permanent channel */
92 if (server->server_type == SILC_SERVER &&
93 !silc_server_channel_has_local(channel)) {
94 if (silc_hash_table_find(channels, channel, NULL, NULL))
95 silc_hash_table_del(channels, channel);
96 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
97 silc_server_channel_delete(server, channel);
101 /* Mark other local clients to the table of clients whom will receive
102 the SERVER_SIGNOFF notify. */
103 silc_hash_table_list(channel->user_list, &htl2);
104 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
105 SilcClientEntry c = chl2->client;
109 /* Add client to table, if it's not from the signoff server */
110 if (c->router != server_entry &&
111 !silc_hash_table_find(clients, c, NULL, NULL))
112 silc_hash_table_add(clients, c, c);
114 silc_hash_table_list_reset(&htl2);
116 /* Add the channel to the the channels list to regenerate the
118 if (!silc_hash_table_find(channels, channel, NULL, NULL))
119 silc_hash_table_add(channels, channel, channel);
121 silc_hash_table_list_reset(&htl);
122 assert(!silc_hash_table_count(client->channels));
125 /* This function removes all client entries that are originated from
126 `router' and are owned by `entry'. `router' and `entry' can be same
127 too. If `server_signoff' is TRUE then SERVER_SIGNOFF notify is
128 distributed to our local clients. */
130 bool silc_server_remove_clients_by_server(SilcServer server,
131 SilcServerEntry router,
132 SilcServerEntry entry,
135 SilcIDCacheList list = NULL;
136 SilcIDCacheEntry id_cache = NULL;
137 SilcClientEntry client = NULL;
139 unsigned char **argv = NULL;
140 SilcUInt32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
141 SilcHashTableList htl;
142 SilcChannelEntry channel;
143 SilcHashTable channels, clients;
146 if (!(entry->data.status & SILC_IDLIST_STATUS_REGISTERED))
149 SILC_LOG_DEBUG(("Removing clients by %s",
150 entry->server_name ? entry->server_name : "server"));
155 /* Allocate the hash table that holds the channels that require
156 channel key re-generation after we've removed this server's clients
157 from the channels. */
158 channels = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
160 clients = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
163 if (server_signoff) {
164 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
165 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
166 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
167 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
168 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
169 memcpy(argv[argc], idp->data, idp->len);
170 argv_lens[argc] = idp->len;
171 argv_types[argc] = argc + 1;
173 silc_buffer_free(idp);
176 if (silc_idcache_get_all(server->local_list->clients, &list)) {
177 if (silc_idcache_list_first(list, &id_cache)) {
179 client = (SilcClientEntry)id_cache->context;
181 /* If client is not registered, is not originated from `router'
182 and is not owned by `entry', skip it. */
183 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
184 client->router != router ||
185 (router != entry && !SILC_ID_COMPARE(client->id, entry->id,
186 client->id->ip.data_len))) {
187 if (!silc_idcache_list_next(list, &id_cache))
193 if (server_signoff) {
194 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
195 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
196 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
198 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
200 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
201 memcpy(argv[argc], idp->data, idp->len);
202 argv_lens[argc] = idp->len;
203 argv_types[argc] = argc + 1;
205 silc_buffer_free(idp);
208 /* Update statistics */
209 server->stat.clients--;
210 if (server->stat.cell_clients)
211 server->stat.cell_clients--;
212 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
213 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
215 if (client->data.public_key)
216 silc_hash_table_del_by_context(server->pk_hash,
217 client->data.public_key,
219 silc_server_remove_clients_channels(server, entry, clients,
221 silc_server_del_from_watcher_list(server, client);
223 /* Remove the client entry */
224 if (!server_signoff) {
225 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
227 client->router = NULL;
228 client->connection = NULL;
229 id_cache->expire = SILC_ID_CACHE_EXPIRE_DEF;
231 silc_idlist_del_data(client);
232 silc_idlist_del_client(server->local_list, client);
235 if (!silc_idcache_list_next(list, &id_cache))
239 silc_idcache_list_free(list);
242 if (silc_idcache_get_all(server->global_list->clients, &list)) {
244 if (silc_idcache_list_first(list, &id_cache)) {
246 client = (SilcClientEntry)id_cache->context;
248 /* If client is not registered, is not originated from `router'
249 and is not owned by `entry', skip it. */
250 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
251 client->router != router ||
252 (router != entry && !SILC_ID_COMPARE(client->id, entry->id,
253 client->id->ip.data_len))) {
254 if (!silc_idcache_list_next(list, &id_cache))
260 if (server_signoff) {
261 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
262 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
263 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
265 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
267 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
268 memcpy(argv[argc], idp->data, idp->len);
269 argv_lens[argc] = idp->len;
270 argv_types[argc] = argc + 1;
272 silc_buffer_free(idp);
275 /* Update statistics */
276 server->stat.clients--;
277 if (server->stat.cell_clients)
278 server->stat.cell_clients--;
279 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
280 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
282 if (client->data.public_key)
283 silc_hash_table_del_by_context(server->pk_hash,
284 client->data.public_key,
286 silc_server_remove_clients_channels(server, entry, clients,
288 silc_server_del_from_watcher_list(server, client);
290 /* Remove the client entry */
291 if (!server_signoff) {
292 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
294 client->router = NULL;
295 client->connection = NULL;
296 id_cache->expire = SILC_ID_CACHE_EXPIRE_DEF;
298 silc_idlist_del_data(client);
299 silc_idlist_del_client(server->global_list, client);
302 if (!silc_idcache_list_next(list, &id_cache))
306 silc_idcache_list_free(list);
309 /* Return now if we are shutting down */
310 if (server->server_shutdown) {
311 silc_hash_table_free(channels);
313 if (server_signoff) {
314 for (i = 0; i < argc; i++)
317 silc_free(argv_lens);
318 silc_free(argv_types);
319 silc_hash_table_free(clients);
324 /* Send the SERVER_SIGNOFF notify */
325 if (server_signoff) {
326 SilcBuffer args, not;
328 SILC_LOG_DEBUG(("Sending SERVER_SIGNOFF for %s with %d clients",
329 silc_id_render(entry->id, SILC_ID_SERVER), argc - 1));
331 /* Send SERVER_SIGNOFF notify to our primary router */
332 if (server->router != entry) {
333 args = silc_argument_payload_encode(1, argv, argv_lens,
335 silc_server_send_notify_args(server, SILC_PRIMARY_ROUTE(server),
336 SILC_BROADCAST(server),
337 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
339 silc_buffer_free(args);
342 /* Send to local clients. We also send the list of client ID's that
343 is to be removed for those servers that would like to use that list. */
344 args = silc_argument_payload_encode(argc, argv, argv_lens,
346 not = silc_notify_payload_encode_args(SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
348 silc_server_packet_send_clients(server, clients,
349 SILC_PACKET_NOTIFY, 0, FALSE,
350 not->data, not->len, FALSE);
352 /* Send notify also to local backup routers */
353 silc_server_backup_send(server, NULL, SILC_PACKET_NOTIFY, 0,
354 not->data, not->len, FALSE, TRUE);
356 silc_buffer_free(args);
357 silc_buffer_free(not);
358 for (i = 0; i < argc; i++)
361 silc_free(argv_lens);
362 silc_free(argv_types);
363 silc_hash_table_free(clients);
366 /* We must now re-generate the channel key for all channels that had
367 this server's client(s) on the channel. As they left the channel we
368 must re-generate the channel key. */
369 silc_hash_table_list(channels, &htl);
370 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
371 if (!silc_server_create_channel_key(server, channel, 0)) {
372 silc_hash_table_list_reset(&htl);
373 silc_hash_table_free(channels);
377 /* Do not send the channel key if private channel key mode is set */
378 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY || !channel->channel_key)
381 silc_server_send_channel_key(server, NULL, channel,
382 server->server_type == SILC_ROUTER ?
383 FALSE : !server->standalone);
385 silc_hash_table_list_reset(&htl);
386 silc_hash_table_free(channels);
391 static SilcServerEntry
392 silc_server_update_clients_by_real_server(SilcServer server,
393 SilcServerEntry from,
395 SilcClientEntry client,
397 SilcIDCacheEntry client_cache)
399 SilcServerEntry server_entry;
400 SilcIDCacheEntry id_cache = NULL;
401 SilcIDCacheList list;
402 bool tolocal = (to == server->id_entry);
404 SILC_LOG_DEBUG(("Start"));
406 if (!silc_idcache_get_all(server->local_list->servers, &list))
409 if (silc_idcache_list_first(list, &id_cache)) {
411 server_entry = (SilcServerEntry)id_cache->context;
412 if (server_entry != from &&
413 (tolocal || server_entry != server->id_entry) &&
414 SILC_ID_COMPARE(server_entry->id, client->id,
415 client->id->ip.data_len)) {
416 SILC_LOG_DEBUG(("Found (local) %s",
417 silc_id_render(server_entry->id, SILC_ID_SERVER)));
419 if (!server_entry->data.send_key && server_entry->router) {
420 SILC_LOG_DEBUG(("Server not locally connected, use its router"));
421 /* If the client is not marked as local then move it to local list
422 since the server is local. */
424 SILC_LOG_DEBUG(("Moving client to local list"));
425 silc_idcache_add(server->local_list->clients, client_cache->name,
426 client_cache->id, client_cache->context,
427 client_cache->expire, NULL);
428 silc_idcache_del_by_context(server->global_list->clients, client);
430 server_entry = server_entry->router;
432 SILC_LOG_DEBUG(("Server locally connected"));
433 /* If the client is not marked as local then move it to local list
434 since the server is local. */
435 if (server_entry->server_type != SILC_BACKUP_ROUTER && !local) {
436 SILC_LOG_DEBUG(("Moving client to local list"));
437 silc_idcache_add(server->local_list->clients, client_cache->name,
438 client_cache->id, client_cache->context,
439 client_cache->expire, NULL);
440 silc_idcache_del_by_context(server->global_list->clients, client);
442 } else if (server->server_type == SILC_BACKUP_ROUTER && local) {
443 /* If we are backup router and this client is on local list, we
444 must move it to global list, as it is not currently local to
445 us (we are not primary). */
446 SILC_LOG_DEBUG(("Moving client to global list"));
447 silc_idcache_add(server->global_list->clients, client_cache->name,
448 client_cache->id, client_cache->context,
449 client_cache->expire, NULL);
450 silc_idcache_del_by_context(server->local_list->clients, client);
454 silc_idcache_list_free(list);
458 if (!silc_idcache_list_next(list, &id_cache))
463 silc_idcache_list_free(list);
465 if (!silc_idcache_get_all(server->global_list->servers, &list))
468 if (silc_idcache_list_first(list, &id_cache)) {
470 server_entry = (SilcServerEntry)id_cache->context;
471 if (server_entry != from && server_entry != server->id_entry &&
472 (tolocal || server_entry != server->id_entry) &&
473 SILC_ID_COMPARE(server_entry->id, client->id,
474 client->id->ip.data_len)) {
475 SILC_LOG_DEBUG(("Found (global) %s",
476 silc_id_render(server_entry->id, SILC_ID_SERVER)));
478 if (!server_entry->data.send_key && server_entry->router) {
479 SILC_LOG_DEBUG(("Server not locally connected, use its router"));
480 /* If the client is marked as local then move it to global list
481 since the server is global. */
483 SILC_LOG_DEBUG(("Moving client to global list"));
484 silc_idcache_add(server->global_list->clients, client_cache->name,
485 client_cache->id, client_cache->context, 0, NULL);
486 silc_idcache_del_by_context(server->local_list->clients, client);
488 server_entry = server_entry->router;
490 SILC_LOG_DEBUG(("Server locally connected"));
491 /* If the client is marked as local then move it to global list
492 since the server is global. */
493 if (server_entry->server_type != SILC_BACKUP_ROUTER && local) {
494 SILC_LOG_DEBUG(("Moving client to global list"));
495 silc_idcache_add(server->global_list->clients, client_cache->name,
496 client_cache->id, client_cache->context, 0, NULL);
497 silc_idcache_del_by_context(server->local_list->clients, client);
501 silc_idcache_list_free(list);
505 if (!silc_idcache_list_next(list, &id_cache))
510 silc_idcache_list_free(list);
515 /* Updates the clients that are originated from the `from' to be originated
516 from the `to'. If the `resolve_real_server' is TRUE then this will
517 attempt to figure out which clients really are originated from the
518 `from' and which are originated from a server that we have connection
519 to, when we've acting as backup router. If it is FALSE the `to' will
520 be the new source. */
522 void silc_server_update_clients_by_server(SilcServer server,
523 SilcServerEntry from,
525 bool resolve_real_server)
527 SilcIDCacheList list = NULL;
528 SilcIDCacheEntry id_cache = NULL;
529 SilcClientEntry client = NULL;
532 if (from && from->id) {
533 SILC_LOG_DEBUG(("Changing from server %s",
534 silc_id_render(from->id, SILC_ID_SERVER)));
537 SILC_LOG_DEBUG(("Changing to server %s",
538 silc_id_render(to->id, SILC_ID_SERVER)));
541 SILC_LOG_DEBUG(("global list"));
543 if (silc_idcache_get_all(server->global_list->clients, &list)) {
544 if (silc_idcache_list_first(list, &id_cache)) {
546 client = (SilcClientEntry)id_cache->context;
548 /* If entry is disabled skip it. If entry is local to us, do not
549 switch it to anyone else, it is ours so skip it. */
550 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
551 SILC_IS_LOCAL(client)) {
552 if (!silc_idcache_list_next(list, &id_cache))
558 SILC_LOG_DEBUG(("Client %s",
559 silc_id_render(client->id, SILC_ID_CLIENT)));
560 if (client->router && client->router->id)
561 SILC_LOG_DEBUG(("Client->router %s",
562 silc_id_render(client->router->id, SILC_ID_SERVER)));
565 if (client->router == from) {
566 if (resolve_real_server) {
568 silc_server_update_clients_by_real_server(server, from, to,
571 if (!client->router) {
572 if (server->server_type == SILC_ROUTER)
573 client->router = from;
582 /* All are changed */
583 if (resolve_real_server)
584 /* Call this so that the entry is moved to correct list if
585 needed. No resolving by real server is actually done. */
586 silc_server_update_clients_by_real_server(server, NULL, to,
593 if (client->router && client->router->id)
594 SILC_LOG_DEBUG(("Client changed to %s",
595 silc_id_render(client->router->id, SILC_ID_SERVER)));
597 if (!silc_idcache_list_next(list, &id_cache))
601 silc_idcache_list_free(list);
604 SILC_LOG_DEBUG(("local list"));
606 if (silc_idcache_get_all(server->local_list->clients, &list)) {
607 if (silc_idcache_list_first(list, &id_cache)) {
609 client = (SilcClientEntry)id_cache->context;
611 /* If entry is disabled skip it. If entry is local to us, do not
612 switch it to anyone else, it is ours so skip it. */
613 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
614 SILC_IS_LOCAL(client)) {
615 if (!silc_idcache_list_next(list, &id_cache))
621 SILC_LOG_DEBUG(("Client %s",
622 silc_id_render(client->id, SILC_ID_CLIENT)));
623 if (client->router && client->router->id)
624 SILC_LOG_DEBUG(("Client->router %s",
625 silc_id_render(client->router->id, SILC_ID_SERVER)));
628 if (client->router == from) {
629 if (resolve_real_server) {
631 silc_server_update_clients_by_real_server(server, from, to,
635 client->router = from;
641 /* All are changed */
642 if (resolve_real_server)
643 /* Call this so that the entry is moved to correct list if
644 needed. No resolving by real server is actually done. */
645 silc_server_update_clients_by_real_server(server, NULL, to,
652 if (client->router && client->router->id)
653 SILC_LOG_DEBUG(("Client changed to %s",
654 silc_id_render(client->router->id, SILC_ID_SERVER)));
656 if (!silc_idcache_list_next(list, &id_cache))
660 silc_idcache_list_free(list);
664 /* Updates servers that are from `from' to be originated from `to'. This
665 will also update the server's connection to `to's connection. */
667 void silc_server_update_servers_by_server(SilcServer server,
668 SilcServerEntry from,
671 SilcIDCacheList list = NULL;
672 SilcIDCacheEntry id_cache = NULL;
673 SilcServerEntry server_entry = NULL;
675 SILC_LOG_DEBUG(("Updating servers"));
677 if (silc_idcache_get_all(server->local_list->servers, &list)) {
678 if (silc_idcache_list_first(list, &id_cache)) {
680 server_entry = (SilcServerEntry)id_cache->context;
682 /* If entry is local to us, do not switch it to any anyone else,
684 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
685 server_entry == from) {
686 if (!silc_idcache_list_next(list, &id_cache))
692 /* If we are standalone router, any server that is not directly
693 connected to cannot exist anymore. If we are not standalone
694 we update it correctly. */
695 if (server->server_type == SILC_ROUTER && server->standalone) {
696 silc_server_backup_del(server, server_entry);
697 silc_server_backup_replaced_del(server, server_entry);
698 silc_idlist_del_data(server_entry);
699 silc_idlist_del_server(server->local_list, server_entry);
700 server->stat.servers--;
701 server->stat.cell_servers--;
703 /* XXX if we are not standalone, do a check from local config
704 whether this server is in our cell, but not connected to
705 us (in which case we must remove it). */
708 if (server_entry->router == from) {
709 SILC_LOG_DEBUG(("Updating server (local) %s",
710 server_entry->server_name ?
711 server_entry->server_name : ""));
712 server_entry->router = to;
713 server_entry->connection = to->connection;
717 SILC_LOG_DEBUG(("Updating server (local) %s",
718 server_entry->server_name ?
719 server_entry->server_name : ""));
720 server_entry->router = to;
721 server_entry->connection = to->connection;
725 if (!silc_idcache_list_next(list, &id_cache))
729 silc_idcache_list_free(list);
732 if (silc_idcache_get_all(server->global_list->servers, &list)) {
733 if (silc_idcache_list_first(list, &id_cache)) {
735 server_entry = (SilcServerEntry)id_cache->context;
737 /* If entry is local to us, do not switch it to anyone else,
739 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
740 server_entry == from) {
741 if (!silc_idcache_list_next(list, &id_cache))
747 /* If we are standalone router, any server that is not directly
748 connected to cannot exist anymore. If we are not standalone
749 we update it correctly. */
750 if (server->server_type == SILC_ROUTER && server->standalone) {
751 silc_server_backup_del(server, server_entry);
752 silc_server_backup_replaced_del(server, server_entry);
753 silc_idlist_del_data(server_entry);
754 silc_idlist_del_server(server->global_list, server_entry);
755 server->stat.servers--;
756 server->stat.cell_servers--;
758 /* XXX if we are not standalone, do a check from local config
759 whether this server is in our cell, but not connected to
760 us (in which case we must remove it). */
763 if (server_entry->router == from) {
764 SILC_LOG_DEBUG(("Updating server (global) %s",
765 server_entry->server_name ?
766 server_entry->server_name : ""));
767 server_entry->router = to;
768 server_entry->connection = to->connection;
772 SILC_LOG_DEBUG(("Updating server (global) %s",
773 server_entry->server_name ?
774 server_entry->server_name : ""));
775 server_entry->router = to;
776 server_entry->connection = to->connection;
780 if (!silc_idcache_list_next(list, &id_cache))
784 silc_idcache_list_free(list);
789 /* Toggles the enabled/disabled status of local server connections. Packets
790 can be sent to the servers when `toggle_enabled' is TRUE and will be
791 dropped if `toggle_enabled' is FALSE, after this function is called. */
793 void silc_server_local_servers_toggle_enabled(SilcServer server,
796 SilcIDCacheList list = NULL;
797 SilcIDCacheEntry id_cache = NULL;
798 SilcServerEntry server_entry = NULL;
800 if (silc_idcache_get_all(server->local_list->servers, &list)) {
801 if (silc_idcache_list_first(list, &id_cache)) {
803 server_entry = (SilcServerEntry)id_cache->context;
804 if (!SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry) {
805 if (!silc_idcache_list_next(list, &id_cache))
812 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
814 server_entry->data.status |= SILC_IDLIST_STATUS_DISABLED;
816 if (!silc_idcache_list_next(list, &id_cache))
820 silc_idcache_list_free(list);
823 if (silc_idcache_get_all(server->global_list->servers, &list)) {
824 if (silc_idcache_list_first(list, &id_cache)) {
826 server_entry = (SilcServerEntry)id_cache->context;
827 if (!SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry) {
828 if (!silc_idcache_list_next(list, &id_cache))
835 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
837 server_entry->data.status |= SILC_IDLIST_STATUS_DISABLED;
839 if (!silc_idcache_list_next(list, &id_cache))
843 silc_idcache_list_free(list);
847 /* Removes servers that are originated from the `from'. The server
848 entry is deleted in this function. If `remove_clients' is TRUE then
849 all clients originated from the server are removed too, and server
850 signoff is sent. Note that this does not remove the `from'. This
851 also does not remove locally connected servers. */
853 void silc_server_remove_servers_by_server(SilcServer server,
854 SilcServerEntry from,
857 SilcIDCacheList list = NULL;
858 SilcIDCacheEntry id_cache = NULL;
859 SilcServerEntry server_entry = NULL;
861 SILC_LOG_DEBUG(("Removing servers by %s",
862 from->server_name ? from->server_name : "server"));
864 if (silc_idcache_get_all(server->local_list->servers, &list)) {
865 if (silc_idcache_list_first(list, &id_cache)) {
867 server_entry = (SilcServerEntry)id_cache->context;
868 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
869 server_entry->router != from || server_entry == from) {
870 if (!silc_idcache_list_next(list, &id_cache))
876 /* Remove clients owned by this server */
878 silc_server_remove_clients_by_server(server, from, server_entry,
881 /* Remove the server */
882 silc_server_backup_del(server, server_entry);
883 silc_idlist_del_server(server->local_list, server_entry);
885 if (!silc_idcache_list_next(list, &id_cache))
889 silc_idcache_list_free(list);
892 if (silc_idcache_get_all(server->global_list->servers, &list)) {
893 if (silc_idcache_list_first(list, &id_cache)) {
895 server_entry = (SilcServerEntry)id_cache->context;
896 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
897 server_entry->router != from || server_entry == from) {
898 if (!silc_idcache_list_next(list, &id_cache))
904 /* Remove clients owned by this server */
906 silc_server_remove_clients_by_server(server, from, server_entry,
909 /* Remove the server */
910 silc_server_backup_del(server, server_entry);
911 silc_idlist_del_server(server->global_list, server_entry);
913 if (!silc_idcache_list_next(list, &id_cache))
917 silc_idcache_list_free(list);
921 /* Removes channels that are from `from. */
923 void silc_server_remove_channels_by_server(SilcServer server,
924 SilcServerEntry from)
926 SilcIDCacheList list = NULL;
927 SilcIDCacheEntry id_cache = NULL;
928 SilcChannelEntry channel = NULL;
930 SILC_LOG_DEBUG(("Removing channels by server"));
932 if (silc_idcache_get_all(server->global_list->channels, &list)) {
933 if (silc_idcache_list_first(list, &id_cache)) {
935 channel = (SilcChannelEntry)id_cache->context;
936 if (channel->router == from)
937 silc_idlist_del_channel(server->global_list, channel);
938 if (!silc_idcache_list_next(list, &id_cache))
942 silc_idcache_list_free(list);
946 /* Updates channels that are from `from' to be originated from `to'. */
948 void silc_server_update_channels_by_server(SilcServer server,
949 SilcServerEntry from,
952 SilcIDCacheList list = NULL;
953 SilcIDCacheEntry id_cache = NULL;
954 SilcChannelEntry channel = NULL;
956 SILC_LOG_DEBUG(("Updating channels by server"));
958 if (silc_idcache_get_all(server->global_list->channels, &list)) {
959 if (silc_idcache_list_first(list, &id_cache)) {
961 channel = (SilcChannelEntry)id_cache->context;
963 if (channel->router == from)
964 channel->router = to;
967 channel->router = to;
969 if (!silc_idcache_list_next(list, &id_cache))
973 silc_idcache_list_free(list);
977 /* Checks whether given channel has global users. If it does this returns
978 TRUE and FALSE if there is only locally connected clients on the channel. */
980 bool silc_server_channel_has_global(SilcChannelEntry channel)
982 SilcChannelClientEntry chl;
983 SilcHashTableList htl;
985 silc_hash_table_list(channel->user_list, &htl);
986 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
987 if (chl->client->router) {
988 silc_hash_table_list_reset(&htl);
992 silc_hash_table_list_reset(&htl);
997 /* Checks whether given channel has locally connected users. If it does this
998 returns TRUE and FALSE if there is not one locally connected client. */
1000 bool silc_server_channel_has_local(SilcChannelEntry channel)
1002 SilcChannelClientEntry chl;
1003 SilcHashTableList htl;
1005 silc_hash_table_list(channel->user_list, &htl);
1006 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
1007 if (SILC_IS_LOCAL(chl->client)) {
1008 silc_hash_table_list_reset(&htl);
1012 silc_hash_table_list_reset(&htl);
1017 /* This function removes the channel and all users on the channel, unless
1018 the channel is permanent. In this case the channel is disabled but all
1019 users are removed from the channel. Returns TRUE if the channel is
1020 destroyed totally, and FALSE if it is permanent and remains. */
1022 bool silc_server_channel_delete(SilcServer server,
1023 SilcChannelEntry channel)
1025 SilcChannelClientEntry chl;
1026 SilcHashTableList htl;
1027 bool delchan = !(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH);
1029 SILC_LOG_DEBUG(("Deleting channel %s", channel->channel_name));
1032 /* Update statistics */
1033 if (server->server_type == SILC_ROUTER)
1034 server->stat.chanclients -= channel->user_count;
1036 /* Totally delete the channel and all users on the channel. The
1037 users are deleted automatically in silc_idlist_del_channel. */
1038 channel->disabled = TRUE;
1039 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
1040 if (silc_idlist_del_channel(server->local_list, channel)) {
1041 server->stat.my_channels--;
1042 if (server->server_type == SILC_ROUTER) {
1043 server->stat.channels--;
1044 server->stat.cell_channels--;
1047 if (silc_idlist_del_channel(server->global_list, channel))
1048 if (server->server_type == SILC_ROUTER)
1049 server->stat.channels--;
1055 /* Channel is permanent, do not remove it, remove only users */
1056 channel->disabled = TRUE;
1057 silc_hash_table_list(channel->user_list, &htl);
1058 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
1059 silc_hash_table_del(chl->client->channels, channel);
1060 silc_hash_table_del(channel->user_list, chl->client);
1061 channel->user_count--;
1063 /* Update statistics */
1064 if (SILC_IS_LOCAL(chl->client))
1065 server->stat.my_chanclients--;
1066 if (server->server_type == SILC_ROUTER) {
1067 server->stat.cell_chanclients--;
1068 server->stat.chanclients--;
1073 silc_hash_table_list_reset(&htl);
1075 SILC_LOG_DEBUG(("Channel %s remains (permanent)", channel->channel_name));
1080 /* Returns TRUE if the given client is on the channel. FALSE if not.
1081 This works because we assure that the user list on the channel is
1082 always in up to date thus we can only check the channel list from
1083 `client' which is faster than checking the user list from `channel'. */
1085 bool silc_server_client_on_channel(SilcClientEntry client,
1086 SilcChannelEntry channel,
1087 SilcChannelClientEntry *chl)
1089 if (!client || !channel)
1092 return silc_hash_table_find(client->channels, channel, NULL,
1096 /* Find number of sockets by IP address indicated by `ip'. Returns 0 if
1097 socket connections with the IP address does not exist. */
1099 SilcUInt32 silc_server_num_sockets_by_ip(SilcServer server, const char *ip,
1100 SilcSocketType type)
1104 for (i = 0, count = 0; i < server->config->param.connections_max; i++) {
1105 if (server->sockets[i] && !SILC_IS_LISTENER(server->sockets[i]) &&
1106 !strcmp(server->sockets[i]->ip, ip) &&
1107 server->sockets[i]->type == type)
1114 /* Find number of sockets by IP address indicated by remote host, indicatd
1115 by `ip' or `hostname', `port', and `type'. Returns 0 if socket connections
1116 does not exist. If `ip' is provided then `hostname' is ignored. */
1118 SilcUInt32 silc_server_num_sockets_by_remote(SilcServer server,
1120 const char *hostname,
1122 SilcSocketType type)
1126 if (!ip && !hostname)
1129 for (i = 0, count = 0; i < server->config->param.connections_max; i++) {
1130 if (server->sockets[i] && !SILC_IS_LISTENER(server->sockets[i]) &&
1131 ((ip && !strcmp(server->sockets[i]->ip, ip)) ||
1132 (hostname && !strcmp(server->sockets[i]->hostname, hostname))) &&
1133 server->sockets[i]->port == port &&
1134 server->sockets[i]->type == type)
1141 /* Finds locally cached public key by the public key received in the SKE.
1142 If we have it locally cached then we trust it and will use it in the
1143 authentication protocol. Returns the locally cached public key or NULL
1144 if we do not find the public key. */
1146 SilcPublicKey silc_server_find_public_key(SilcServer server,
1147 SilcHashTable local_public_keys,
1148 SilcPublicKey remote_public_key)
1150 SilcPublicKey cached_key;
1152 SILC_LOG_DEBUG(("Find remote public key (%d keys in local cache)",
1153 silc_hash_table_count(local_public_keys)));
1155 if (!silc_hash_table_find_ext(local_public_keys, remote_public_key,
1156 (void *)&cached_key, NULL,
1157 silc_hash_public_key, NULL,
1158 silc_hash_public_key_compare, NULL)) {
1159 SILC_LOG_ERROR(("Public key not found"));
1163 SILC_LOG_DEBUG(("Found public key"));
1168 /* This returns the first public key from the table of public keys. This
1169 is used only in cases where single public key exists in the table and
1170 we want to get a pointer to it. For public key tables that has multiple
1171 keys in it the silc_server_find_public_key must be used. */
1173 SilcPublicKey silc_server_get_public_key(SilcServer server,
1174 SilcHashTable local_public_keys)
1176 SilcPublicKey cached_key;
1177 SilcHashTableList htl;
1179 SILC_LOG_DEBUG(("Start"));
1181 assert(silc_hash_table_count(local_public_keys) < 2);
1183 silc_hash_table_list(local_public_keys, &htl);
1184 if (!silc_hash_table_get(&htl, NULL, (void *)&cached_key)) {
1185 silc_hash_table_list_reset(&htl);
1188 silc_hash_table_list_reset(&htl);
1193 /* Check whether the connection `sock' is allowed to connect to us. This
1194 checks for example whether there is too much connections for this host,
1195 and required version for the host etc. */
1197 bool silc_server_connection_allowed(SilcServer server,
1198 SilcSocketConnection sock,
1199 SilcSocketType type,
1200 SilcServerConfigConnParams *global,
1201 SilcServerConfigConnParams *params,
1204 SilcUInt32 conn_number = (type == SILC_SOCKET_TYPE_CLIENT ?
1205 server->stat.my_clients :
1206 type == SILC_SOCKET_TYPE_SERVER ?
1207 server->stat.my_servers :
1208 server->stat.my_routers);
1209 SilcUInt32 num_sockets, max_hosts, max_per_host;
1210 SilcUInt32 r_protocol_version, l_protocol_version;
1211 SilcUInt32 r_software_version, l_software_version;
1212 char *r_vendor_version = NULL, *l_vendor_version;
1214 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
1218 l_protocol_version =
1219 silc_version_to_num(params && params->version_protocol ?
1220 params->version_protocol :
1221 global->version_protocol);
1222 l_software_version =
1223 silc_version_to_num(params && params->version_software ?
1224 params->version_software :
1225 global->version_software);
1226 l_vendor_version = (params && params->version_software_vendor ?
1227 params->version_software_vendor :
1228 global->version_software_vendor);
1230 if (ske && silc_ske_parse_version(ske, &r_protocol_version, NULL,
1231 &r_software_version, NULL,
1232 &r_vendor_version)) {
1233 sock->version = r_protocol_version;
1235 /* Match protocol version */
1236 if (l_protocol_version && r_protocol_version &&
1237 r_protocol_version < l_protocol_version) {
1238 SILC_LOG_INFO(("Connection %s (%s) is too old version",
1239 sock->hostname, sock->ip));
1240 sock->protocol = NULL;
1241 silc_server_disconnect_remote(server, sock,
1242 SILC_STATUS_ERR_BAD_VERSION,
1243 "You support too old protocol version");
1247 /* Math software version */
1248 if (l_software_version && r_software_version &&
1249 r_software_version < l_software_version) {
1250 SILC_LOG_INFO(("Connection %s (%s) is too old version",
1251 sock->hostname, sock->ip));
1252 sock->protocol = NULL;
1253 silc_server_disconnect_remote(server, sock,
1254 SILC_STATUS_ERR_BAD_VERSION,
1255 "You support too old software version");
1259 /* Regex match vendor version */
1260 if (l_vendor_version && r_vendor_version &&
1261 !silc_string_match(l_vendor_version, r_vendor_version)) {
1262 SILC_LOG_INFO(("Connection %s (%s) is unsupported version",
1263 sock->hostname, sock->ip));
1264 sock->protocol = NULL;
1265 silc_server_disconnect_remote(server, sock,
1266 SILC_STATUS_ERR_BAD_VERSION,
1267 "Your software is not supported");
1271 silc_free(r_vendor_version);
1273 /* Check for maximum connections limit */
1275 num_sockets = silc_server_num_sockets_by_ip(server, sock->ip, type);
1276 max_hosts = (params ? params->connections_max : global->connections_max);
1277 max_per_host = (params ? params->connections_max_per_host :
1278 global->connections_max_per_host);
1280 if (max_hosts && conn_number >= max_hosts) {
1281 SILC_LOG_INFO(("Server is full, closing %s (%s) connection",
1282 sock->hostname, sock->ip));
1283 sock->protocol = NULL;
1284 silc_server_disconnect_remote(server, sock,
1285 SILC_STATUS_ERR_RESOURCE_LIMIT,
1286 "Server is full, try again later");
1290 if (num_sockets >= max_per_host) {
1291 SILC_LOG_INFO(("Too many connections from %s (%s), closing connection",
1292 sock->hostname, sock->ip));
1293 sock->protocol = NULL;
1294 silc_server_disconnect_remote(server, sock,
1295 SILC_STATUS_ERR_RESOURCE_LIMIT,
1296 "Too many connections from your host");
1303 /* Checks that client has rights to add or remove channel modes. If any
1304 of the checks fails FALSE is returned. */
1306 bool silc_server_check_cmode_rights(SilcServer server,
1307 SilcChannelEntry channel,
1308 SilcChannelClientEntry client,
1311 bool is_op = client->mode & SILC_CHANNEL_UMODE_CHANOP;
1312 bool is_fo = client->mode & SILC_CHANNEL_UMODE_CHANFO;
1314 /* Check whether has rights to change anything */
1315 if (!is_op && !is_fo)
1318 /* Check whether has rights to change everything */
1322 /* Founder implies operator */
1326 /* We know that client is channel operator, check that they are not
1327 changing anything that requires channel founder rights. Rest of the
1328 modes are available automatically for channel operator. */
1330 if (mode & SILC_CHANNEL_MODE_PRIVKEY) {
1331 if (is_op && !is_fo)
1334 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
1335 if (is_op && !is_fo)
1340 if (mode & SILC_CHANNEL_MODE_PASSPHRASE) {
1341 if (!(channel->mode & SILC_CHANNEL_MODE_PASSPHRASE)) {
1342 if (is_op && !is_fo)
1346 if (channel->mode & SILC_CHANNEL_MODE_PASSPHRASE) {
1347 if (is_op && !is_fo)
1352 if (mode & SILC_CHANNEL_MODE_CIPHER) {
1353 if (!(channel->mode & SILC_CHANNEL_MODE_CIPHER)) {
1354 if (is_op && !is_fo)
1358 if (channel->mode & SILC_CHANNEL_MODE_CIPHER) {
1359 if (is_op && !is_fo)
1364 if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
1365 if (!(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH)) {
1366 if (is_op && !is_fo)
1370 if (channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
1371 if (is_op && !is_fo)
1376 if (mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
1377 if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS)) {
1378 if (is_op && !is_fo)
1382 if (channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
1383 if (is_op && !is_fo)
1388 if (mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
1389 if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS)) {
1390 if (is_op && !is_fo)
1394 if (channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
1395 if (is_op && !is_fo)
1400 if (mode & SILC_CHANNEL_MODE_CHANNEL_AUTH) {
1401 if (!(channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH)) {
1402 if (is_op && !is_fo)
1406 if (channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH) {
1407 if (is_op && !is_fo)
1415 /* Check that the client has rights to change its user mode. Returns
1416 FALSE if setting some mode is not allowed. */
1418 bool silc_server_check_umode_rights(SilcServer server,
1419 SilcClientEntry client,
1422 bool server_op = FALSE, router_op = FALSE;
1424 if (mode & SILC_UMODE_SERVER_OPERATOR) {
1425 /* Cannot set server operator mode (must use OPER command) */
1426 if (!(client->mode & SILC_UMODE_SERVER_OPERATOR))
1429 /* Remove the server operator rights */
1430 if (client->mode & SILC_UMODE_SERVER_OPERATOR)
1434 if (mode & SILC_UMODE_ROUTER_OPERATOR) {
1435 /* Cannot set router operator mode (must use SILCOPER command) */
1436 if (!(client->mode & SILC_UMODE_ROUTER_OPERATOR))
1439 /* Remove the router operator rights */
1440 if (client->mode & SILC_UMODE_ROUTER_OPERATOR)
1445 SILC_UMODE_STATS_UPDATE(server, SILC_UMODE_SERVER_OPERATOR);
1447 SILC_UMODE_STATS_UPDATE(router, SILC_UMODE_ROUTER_OPERATOR);
1452 /* This function is used to send the notify packets and motd to the
1453 incoming client connection. */
1455 void silc_server_send_connect_notifys(SilcServer server,
1456 SilcSocketConnection sock,
1457 SilcClientEntry client)
1459 SilcIDListData idata = (SilcIDListData)client;
1461 SILC_LOG_DEBUG(("Send welcome notifys"));
1463 /* Send some nice info to the client */
1464 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1465 ("Welcome to the SILC Network %s",
1467 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1468 ("Your host is %s, running version %s",
1469 server->server_name, server_version));
1471 if (server->server_type == SILC_ROUTER) {
1472 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1473 ("There are %d clients, %d servers and %d "
1474 "routers in SILC Network",
1475 server->stat.clients, server->stat.servers,
1476 server->stat.routers));
1478 if (server->stat.clients && server->stat.servers + 1)
1479 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1480 ("There are %d clients, %d servers and %d "
1481 "routers in SILC Network",
1482 server->stat.clients, server->stat.servers,
1483 (server->standalone ? 0 :
1484 !server->stat.routers ? 1 :
1485 server->stat.routers)));
1488 if (server->stat.cell_clients && server->stat.cell_servers + 1)
1489 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1490 ("There are %d clients on %d servers in our cell",
1491 server->stat.cell_clients,
1492 server->stat.cell_servers));
1493 if (server->server_type == SILC_ROUTER) {
1494 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1495 ("I have %d clients, %d channels, %d servers and "
1497 server->stat.my_clients,
1498 server->stat.my_channels,
1499 server->stat.my_servers,
1500 server->stat.my_routers));
1502 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1503 ("I have %d clients and %d channels formed",
1504 server->stat.my_clients,
1505 server->stat.my_channels));
1508 if (server->stat.server_ops || server->stat.router_ops)
1509 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1510 ("There are %d server operators and %d router "
1512 server->stat.server_ops,
1513 server->stat.router_ops));
1514 if (server->stat.my_router_ops + server->stat.my_server_ops)
1515 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1516 ("I have %d operators online",
1517 server->stat.my_router_ops +
1518 server->stat.my_server_ops));
1520 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1521 ("Your connection is secured with %s cipher, "
1522 "key length %d bits",
1523 silc_cipher_get_name(idata->send_key),
1524 silc_cipher_get_key_len(idata->send_key)));
1525 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1526 ("Your current nickname is %s",
1530 silc_server_send_motd(server, sock);
1533 /* Kill the client indicated by `remote_client' sending KILLED notify
1534 to the client, to all channels client has joined and to primary
1535 router if needed. The killed client is also removed from all channels. */
1537 void silc_server_kill_client(SilcServer server,
1538 SilcClientEntry remote_client,
1539 const char *comment,
1541 SilcIdType killer_id_type)
1543 SilcBuffer killed, killer;
1545 SILC_LOG_DEBUG(("Killing client %s",
1546 silc_id_render(remote_client->id, SILC_ID_CLIENT)));
1548 /* Send the KILL notify packets. First send it to the channel, then
1549 to our primary router and then directly to the client who is being
1550 killed right now. */
1552 killed = silc_id_payload_encode(remote_client->id, SILC_ID_CLIENT);
1553 killer = silc_id_payload_encode(killer_id, killer_id_type);
1555 /* Send KILLED notify to the channels. It is not sent to the client
1556 as it will be sent differently destined directly to the client and not
1558 silc_server_send_notify_on_channels(server, remote_client,
1559 remote_client, SILC_NOTIFY_TYPE_KILLED,
1560 3, killed->data, killed->len,
1561 comment, comment ? strlen(comment) : 0,
1562 killer->data, killer->len);
1564 /* Send KILLED notify to primary route */
1565 silc_server_send_notify_killed(server, SILC_PRIMARY_ROUTE(server),
1566 SILC_BROADCAST(server), remote_client->id,
1567 comment, killer_id, killer_id_type);
1569 /* Send KILLED notify to the client directly */
1570 if (remote_client->connection || remote_client->router)
1571 silc_server_send_notify_killed(server, remote_client->connection ?
1572 remote_client->connection :
1573 remote_client->router->connection, FALSE,
1574 remote_client->id, comment,
1575 killer_id, killer_id_type);
1577 /* Remove the client from all channels. This generates new keys to the
1578 channels as well. */
1579 silc_server_remove_from_channels(server, NULL, remote_client, FALSE,
1582 /* Remove the client entry, If it is locally connected then we will also
1583 disconnect the client here */
1584 if (remote_client->connection) {
1585 /* Remove locally conneted client */
1586 SilcSocketConnection sock = remote_client->connection;
1587 silc_server_free_client_data(server, sock, remote_client, FALSE, NULL);
1588 silc_server_close_connection(server, sock);
1590 /* Update statistics */
1591 server->stat.clients--;
1592 if (server->stat.cell_clients)
1593 server->stat.cell_clients--;
1594 SILC_OPER_STATS_UPDATE(remote_client, server, SILC_UMODE_SERVER_OPERATOR);
1595 SILC_OPER_STATS_UPDATE(remote_client, router, SILC_UMODE_ROUTER_OPERATOR);
1597 if (remote_client->data.public_key)
1598 silc_hash_table_del_by_context(server->pk_hash,
1599 remote_client->data.public_key,
1602 if (SILC_IS_LOCAL(remote_client)) {
1603 server->stat.my_clients--;
1604 silc_schedule_task_del_by_context(server->schedule, remote_client);
1607 /* Remove remote client */
1608 silc_idlist_del_data(remote_client);
1609 if (!silc_idlist_del_client(server->global_list, remote_client)) {
1610 /* Remove this client from watcher list if it is */
1611 silc_server_del_from_watcher_list(server, remote_client);
1612 silc_idlist_del_client(server->local_list, remote_client);
1616 silc_buffer_free(killer);
1617 silc_buffer_free(killed);
1622 SilcClientEntry client;
1623 SilcNotifyType notify;
1624 const char *new_nick;
1625 } WatcherNotifyContext;
1628 silc_server_check_watcher_list_foreach(void *key, void *context,
1631 WatcherNotifyContext *notify = user_context;
1632 SilcClientEntry entry = context;
1633 SilcSocketConnection sock;
1638 if (entry == notify->client)
1641 sock = silc_server_get_client_route(notify->server, NULL, 0, entry->id,
1644 SILC_LOG_DEBUG(("Sending WATCH notify to %s",
1645 silc_id_render(entry->id, SILC_ID_CLIENT)));
1647 /* Send the WATCH notify */
1648 silc_server_send_notify_watch(notify->server, sock, entry,
1650 notify->new_nick ? notify->new_nick :
1651 (const char *)notify->client->nickname,
1653 notify->client->data.public_key);
1657 /* This function checks whether the `client' nickname and/or 'client'
1658 public key is being watched by someone, and notifies the watcher of the
1659 notify change of notify type indicated by `notify'. */
1661 bool silc_server_check_watcher_list(SilcServer server,
1662 SilcClientEntry client,
1663 const char *new_nick,
1664 SilcNotifyType notify)
1666 unsigned char hash[16];
1667 WatcherNotifyContext n;
1669 SILC_LOG_DEBUG(("Checking watcher list %s",
1670 client->nickname ? client->nickname : (unsigned char *)""));
1672 /* If the watching is rejected by the client do nothing */
1673 if (client->mode & SILC_UMODE_REJECT_WATCHING)
1676 /* Make hash from the nick, or take it from Client ID */
1677 if (client->nickname) {
1678 unsigned char *nickc;
1679 nickc = silc_identifier_check(client->nickname, strlen(client->nickname),
1680 SILC_STRING_UTF8, 128, NULL);
1683 silc_hash_make(server->md5hash, nickc, strlen(nickc), hash);
1686 memset(hash, 0, sizeof(hash));
1687 memcpy(hash, client->id->hash, sizeof(client->id->hash));
1692 n.new_nick = new_nick;
1695 /* Send notify to all watchers watching this nickname */
1696 silc_hash_table_find_foreach(server->watcher_list, hash,
1697 silc_server_check_watcher_list_foreach, &n);
1699 /* Send notify to all watchers watching this public key */
1700 if (client->data.public_key)
1701 silc_hash_table_find_foreach(server->watcher_list_pk,
1702 client->data.public_key,
1703 silc_server_check_watcher_list_foreach,
1709 /* Remove the `client' from watcher list. After calling this the `client'
1710 is not watching any nicknames. */
1712 bool silc_server_del_from_watcher_list(SilcServer server,
1713 SilcClientEntry client)
1715 SilcHashTableList htl;
1717 SilcClientEntry entry;
1720 silc_hash_table_list(server->watcher_list, &htl);
1721 while (silc_hash_table_get(&htl, &key, (void *)&entry)) {
1722 if (entry == client) {
1723 silc_hash_table_del_by_context(server->watcher_list, key, client);
1726 SILC_LOG_DEBUG(("Removing %s from WATCH list",
1727 silc_id_render(client->id, SILC_ID_CLIENT)));
1729 /* Now check whether there still exists entries with this key, if not
1730 then free the key to not leak memory. */
1731 if (!silc_hash_table_find(server->watcher_list, key, NULL, NULL))
1737 silc_hash_table_list_reset(&htl);
1739 silc_hash_table_list(server->watcher_list_pk, &htl);
1740 while (silc_hash_table_get(&htl, &key, (void *)&entry)) {
1741 if (entry == client) {
1742 silc_hash_table_del_by_context(server->watcher_list_pk, key, client);
1745 SILC_LOG_DEBUG(("Removing %s from WATCH list",
1746 silc_id_render(client->id, SILC_ID_CLIENT)));
1748 /* Now check whether there still exists entries with this key, if not
1749 then free the key to not leak memory. */
1750 if (!silc_hash_table_find(server->watcher_list_pk, key, NULL, NULL))
1751 silc_pkcs_public_key_free(key);
1756 silc_hash_table_list_reset(&htl);
1761 /* Force the client indicated by `chl' to change the channel user mode
1762 on channel indicated by `channel' to `forced_mode'. */
1764 bool silc_server_force_cumode_change(SilcServer server,
1765 SilcSocketConnection sock,
1766 SilcChannelEntry channel,
1767 SilcChannelClientEntry chl,
1768 SilcUInt32 forced_mode)
1770 SilcBuffer idp1, idp2;
1771 unsigned char cumode[4];
1773 SILC_LOG_DEBUG(("Enforcing sender to change mode"));
1776 silc_server_send_notify_cumode(server, sock, FALSE, channel, forced_mode,
1777 server->id, SILC_ID_SERVER,
1778 chl->client->id, NULL);
1780 idp1 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
1781 idp2 = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
1782 SILC_PUT32_MSB(forced_mode, cumode);
1783 silc_server_send_notify_to_channel(server, sock, channel, FALSE, TRUE,
1784 SILC_NOTIFY_TYPE_CUMODE_CHANGE,
1785 3, idp1->data, idp1->len,
1786 cumode, sizeof(cumode),
1787 idp2->data, idp2->len);
1788 silc_buffer_free(idp1);
1789 silc_buffer_free(idp2);
1794 /* Find active socket connection by the IP address and port indicated by
1795 `ip' and `port', and socket connection type of `type'. */
1797 SilcSocketConnection
1798 silc_server_find_socket_by_host(SilcServer server,
1799 SilcSocketType type,
1800 const char *ip, SilcUInt16 port)
1804 for (i = 0; i < server->config->param.connections_max; i++) {
1805 if (!server->sockets[i])
1807 if (!strcmp(server->sockets[i]->ip, ip) &&
1808 (!port || server->sockets[i]->port == port) &&
1809 server->sockets[i]->type == type)
1810 return server->sockets[i];
1816 /* This function can be used to match the invite and ban lists. */
1818 bool silc_server_inviteban_match(SilcServer server, SilcHashTable list,
1819 SilcUInt8 type, void *check)
1821 unsigned char *tmp = NULL;
1822 SilcUInt32 len = 0, t;
1823 SilcHashTableList htl;
1824 SilcBuffer entry, idp = NULL, pkp = NULL;
1827 SILC_LOG_DEBUG(("Matching invite/ban"));
1829 if (type < 1 || type > 3 || !check)
1833 tmp = strdup((char *)check);
1838 pkp = silc_pkcs_public_key_payload_encode(check);
1845 idp = silc_id_payload_encode(check, SILC_ID_CLIENT);
1852 /* Compare the list */
1853 silc_hash_table_list(list, &htl);
1854 while (silc_hash_table_get(&htl, (void *)&t, (void *)&entry)) {
1857 if (silc_string_match(entry->data, tmp)) {
1861 } else if (!memcmp(entry->data, tmp, len)) {
1867 silc_hash_table_list_reset(&htl);
1871 silc_buffer_free(idp);
1872 silc_buffer_free(pkp);
1876 /* Process invite or ban information */
1878 bool silc_server_inviteban_process(SilcServer server, SilcHashTable list,
1879 SilcUInt8 action, SilcArgumentPayload args)
1882 SilcUInt32 type, len;
1884 SilcHashTableList htl;
1886 SILC_LOG_DEBUG(("Processing invite/ban for %s action",
1887 action == 0x01 ? "DEL" : "ADD"));
1889 /* Add the information to invite list */
1890 if (action == 0x00 || action == 0x03) {
1891 /* Traverse all arguments and add to the hash table according to
1893 tmp = silc_argument_get_first_arg(args, &type, &len);
1896 /* Check validity of the string */
1897 if (!silc_utf8_valid(tmp, len) || !len) {
1898 tmp = silc_argument_get_next_arg(args, &type, &len);
1902 /* Check if the string is added already */
1903 silc_hash_table_list(list, &htl);
1904 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1905 if (type == 1 && silc_string_match(tmp2->data, tmp)) {
1910 silc_hash_table_list_reset(&htl);
1913 /* Add the string to hash table */
1914 tmp2 = silc_buffer_alloc_size(len + 1);
1915 if (tmp[len - 1] == ',')
1916 tmp[len - 1] = '\0';
1917 silc_buffer_put(tmp2, tmp, len);
1918 silc_hash_table_add(list, (void *)1, tmp2);
1921 } else if (type == 2) {
1922 /* Public key. Check first if the public key is already on the
1923 list and ignore it if it is, otherwise, add it to hash table. */
1926 /* Verify validity of the public key */
1927 if (!silc_pkcs_public_key_payload_decode(tmp, len, &pk)) {
1928 tmp = silc_argument_get_next_arg(args, &type, &len);
1931 silc_pkcs_public_key_free(pk);
1933 /* Check if the public key is in the list already */
1934 silc_hash_table_list(list, &htl);
1935 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1936 if (type == 2 && !memcmp(tmp2->data, tmp, len)) {
1941 silc_hash_table_list_reset(&htl);
1943 /* Add new public key to invite list */
1945 tmp2 = silc_buffer_alloc_size(len);
1946 silc_buffer_put(tmp2, tmp, len);
1947 silc_hash_table_add(list, (void *)2, tmp2);
1950 } else if (type == 3) {
1953 /* Check if the ID is in the list already */
1954 silc_hash_table_list(list, &htl);
1955 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1956 if (type == 3 && !memcmp(tmp2->data, tmp, len)) {
1961 silc_hash_table_list_reset(&htl);
1963 /* Add new Client ID to invite list */
1965 tmp2 = silc_buffer_alloc_size(len);
1966 silc_buffer_put(tmp2, tmp, len);
1967 silc_hash_table_add(list, (void *)3, tmp2);
1971 tmp = silc_argument_get_next_arg(args, &type, &len);
1975 /* Delete information to invite list */
1976 if (action == 0x01 && list) {
1977 /* Now delete the arguments from invite list */
1978 tmp = silc_argument_get_first_arg(args, &type, &len);
1981 /* Check validity of the string */
1982 if (!silc_utf8_valid(tmp, len)) {
1983 tmp = silc_argument_get_next_arg(args, &type, &len);
1987 /* Delete from the list */
1988 silc_hash_table_list(list, &htl);
1989 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1990 if (type == 1 && silc_string_match(tmp2->data, tmp)) {
1991 silc_hash_table_del_by_context(list, (void *)1, tmp2);
1995 silc_hash_table_list_reset(&htl);
1997 } else if (type == 2) {
2001 /* Verify validity of the public key */
2002 if (!silc_pkcs_public_key_payload_decode(tmp, len, &pk)) {
2003 tmp = silc_argument_get_next_arg(args, &type, &len);
2006 silc_pkcs_public_key_free(pk);
2008 /* Delete from the invite list */
2009 silc_hash_table_list(list, &htl);
2010 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
2011 if (type == 2 && !memcmp(tmp2->data, tmp, len)) {
2012 silc_hash_table_del_by_context(list, (void *)2, tmp2);
2016 silc_hash_table_list_reset(&htl);
2018 } else if (type == 3) {
2021 /* Delete from the invite list */
2022 silc_hash_table_list(list, &htl);
2023 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
2024 if (type == 3 && !memcmp(tmp2->data, tmp, len)) {
2025 silc_hash_table_del_by_context(list, (void *)3, tmp2);
2029 silc_hash_table_list_reset(&htl);
2032 tmp = silc_argument_get_next_arg(args, &type, &len);
2039 /* Destructor for invite and ban list entrys */
2041 void silc_server_inviteban_destruct(void *key, void *context,
2044 silc_buffer_free(context);
2047 /* Creates connections accoring to configuration. */
2049 void silc_server_create_connections(SilcServer server)
2051 silc_schedule_task_del_by_callback(server->schedule,
2052 silc_server_connect_to_router);
2053 silc_schedule_task_add(server->schedule, 0,
2054 silc_server_connect_to_router, server, 0, 1,
2055 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2059 silc_server_process_channel_pk_destruct(void *key, void *context,
2063 silc_pkcs_public_key_free(context);
2066 /* Processes a channel public key, either adds or removes it. */
2069 silc_server_process_channel_pk(SilcServer server,
2070 SilcChannelEntry channel,
2071 SilcUInt32 type, const unsigned char *pk,
2074 unsigned char pkhash[20];
2077 SILC_LOG_DEBUG(("Processing channel public key"));
2080 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2082 /* Decode the public key */
2083 if (!silc_pkcs_public_key_payload_decode((unsigned char *)pk, pk_len, &chpk))
2084 return SILC_STATUS_ERR_UNSUPPORTED_PUBLIC_KEY;
2086 /* Create channel public key list (hash table) if needed */
2087 if (!channel->channel_pubkeys) {
2088 channel->channel_pubkeys =
2089 silc_hash_table_alloc(0, silc_hash_data, (void *)20,
2090 silc_hash_data_compare, (void *)20,
2091 silc_server_process_channel_pk_destruct, channel,
2095 /* Create SHA-1 digest of the public key data */
2096 silc_hash_make(server->sha1hash, pk + 4, pk_len - 4, pkhash);
2099 /* Add new public key to channel public key list */
2100 SILC_LOG_DEBUG(("Add new channel public key to channel %s",
2101 channel->channel_name));
2103 /* Check for resource limit */
2104 if (silc_hash_table_count(channel->channel_pubkeys) > 64) {
2105 silc_pkcs_public_key_free(chpk);
2106 return SILC_STATUS_ERR_RESOURCE_LIMIT;
2109 /* Add if doesn't exist already */
2110 if (!silc_hash_table_find(channel->channel_pubkeys, pkhash,
2112 silc_hash_table_add(channel->channel_pubkeys, silc_memdup(pkhash, 20),
2114 } else if (type == 0x01) {
2115 /* Delete public key from channel public key list */
2116 SILC_LOG_DEBUG(("Delete a channel public key from channel %s",
2117 channel->channel_name));
2118 if (!silc_hash_table_del(channel->channel_pubkeys, pkhash))
2119 silc_pkcs_public_key_free(chpk);
2121 silc_pkcs_public_key_free(chpk);
2122 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2125 return SILC_STATUS_OK;
2128 /* Returns the channel public keys as Argument List payload. */
2130 SilcBuffer silc_server_get_channel_pk_list(SilcServer server,
2131 SilcChannelEntry channel,
2135 SilcHashTableList htl;
2136 SilcBuffer list, pkp;
2139 SILC_LOG_DEBUG(("Encoding channel public keys list"));
2141 if (!channel->channel_pubkeys ||
2142 !silc_hash_table_count(channel->channel_pubkeys))
2145 /* Encode the list */
2146 list = silc_buffer_alloc_size(2);
2147 silc_buffer_format(list,
2148 SILC_STR_UI_SHORT(silc_hash_table_count(
2149 channel->channel_pubkeys)),
2152 silc_hash_table_list(channel->channel_pubkeys, &htl);
2153 while (silc_hash_table_get(&htl, NULL, (void *)&pk)) {
2154 pkp = silc_pkcs_public_key_payload_encode(pk);
2155 list = silc_argument_payload_encode_one(list, pkp->data, pkp->len,
2157 delete ? 0x01 : 0x00);
2158 silc_buffer_free(pkp);
2160 silc_hash_table_list_reset(&htl);
2165 /* Sets the channel public keys into channel from the list of public keys. */
2167 SilcStatus silc_server_set_channel_pk_list(SilcServer server,
2168 SilcSocketConnection sender,
2169 SilcChannelEntry channel,
2170 const unsigned char *pklist,
2171 SilcUInt32 pklist_len)
2174 SilcArgumentPayload args;
2175 unsigned char *chpk;
2176 SilcUInt32 chpklen, type;
2177 SilcStatus ret = SILC_STATUS_OK;
2179 SILC_LOG_DEBUG(("Setting channel public keys list"));
2181 if (!pklist || pklist_len < 2)
2182 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2184 /* Get the argument from the Argument List Payload */
2185 SILC_GET16_MSB(argc, pklist);
2186 args = silc_argument_payload_parse(pklist + 2, pklist_len - 2, argc);
2188 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2190 /* Process the public keys one by one */
2191 chpk = silc_argument_get_first_arg(args, &type, &chpklen);
2193 /* If announcing keys and we have them set already, do not allow this */
2194 if (chpk && type == 0x03 && channel->channel_pubkeys &&
2195 server->server_type == SILC_ROUTER &&
2196 sender != SILC_PRIMARY_ROUTE(server)) {
2197 SILC_LOG_DEBUG(("Channel public key list set already, enforce our list"));
2198 silc_argument_payload_free(args);
2199 return SILC_STATUS_ERR_OPERATION_ALLOWED;
2202 /* If we are normal server and receive announcement list and we already
2203 have keys set, we replace the old list with the announced one. */
2204 if (chpk && type == 0x03 && channel->channel_pubkeys &&
2205 server->server_type != SILC_ROUTER) {
2207 unsigned char mask[4], ulimit[4];
2209 SILC_LOG_DEBUG(("Router enforces its list, remove old list"));
2210 silc_hash_table_free(channel->channel_pubkeys);
2211 channel->channel_pubkeys = NULL;
2213 /* Send notify that removes the old list */
2214 sidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
2215 SILC_PUT32_MSB((channel->mode & (~SILC_CHANNEL_MODE_CHANNEL_AUTH)), mask);
2216 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
2217 SILC_PUT32_MSB(channel->user_limit, ulimit);
2218 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
2219 SILC_NOTIFY_TYPE_CMODE_CHANGE, 8,
2220 sidp->data, sidp->len,
2224 strlen(channel->cipher) : 0,
2226 channel->hmac_name ?
2227 strlen(channel->hmac_name) : 0,
2228 channel->passphrase,
2229 channel->passphrase ?
2230 strlen(channel->passphrase) : 0,
2233 SILC_CHANNEL_MODE_ULIMIT ?
2236 SILC_CHANNEL_MODE_ULIMIT ?
2237 sizeof(ulimit) : 0));
2238 silc_buffer_free(sidp);
2244 ret = silc_server_process_channel_pk(server, channel, type,
2246 if (ret != SILC_STATUS_OK)
2248 chpk = silc_argument_get_next_arg(args, &type, &chpklen);
2251 silc_argument_payload_free(args);
2255 /* Verifies the Authentication Payload `auth' with one of the public keys
2256 on the `channel' public key list. */
2258 bool silc_server_verify_channel_auth(SilcServer server,
2259 SilcChannelEntry channel,
2260 SilcClientID *client_id,
2261 const unsigned char *auth,
2262 SilcUInt32 auth_len)
2266 unsigned char *pkhash;
2267 SilcUInt32 pkhash_len;
2270 SILC_LOG_DEBUG(("Verifying channel authentication"));
2272 if (!auth || !auth_len || !channel->channel_pubkeys)
2275 /* Get the hash from the auth data which tells us what public key we
2276 must use in verification. */
2278 ap = silc_auth_payload_parse(auth, auth_len);
2282 pkhash = silc_auth_get_public_data(ap, &pkhash_len);
2283 if (pkhash_len < 128)
2286 /* Find the public key with the hash */
2287 if (!silc_hash_table_find(channel->channel_pubkeys, pkhash,
2288 NULL, (void *)&chpk)) {
2289 SILC_LOG_DEBUG(("Public key not found in channel public key list"));
2293 /* Verify the signature */
2294 if (!silc_auth_verify(ap, SILC_AUTH_PUBLIC_KEY, (void *)chpk, 0,
2295 server->sha1hash, client_id, SILC_ID_CLIENT)) {
2296 SILC_LOG_DEBUG(("Authentication failed"));
2303 silc_auth_payload_free(ap);