5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2004 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;
226 id_cache->expire = SILC_ID_CACHE_EXPIRE_DEF;
228 silc_idlist_del_data(client);
229 silc_idlist_del_client(server->local_list, client);
232 if (!silc_idcache_list_next(list, &id_cache))
236 silc_idcache_list_free(list);
239 if (silc_idcache_get_all(server->global_list->clients, &list)) {
241 if (silc_idcache_list_first(list, &id_cache)) {
243 client = (SilcClientEntry)id_cache->context;
245 /* If client is not registered, is not originated from `router'
246 and is not owned by `entry', skip it. */
247 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
248 client->router != router ||
249 (router != entry && !SILC_ID_COMPARE(client->id, entry->id,
250 client->id->ip.data_len))) {
251 if (!silc_idcache_list_next(list, &id_cache))
257 if (server_signoff) {
258 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
259 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
260 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
262 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
264 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
265 memcpy(argv[argc], idp->data, idp->len);
266 argv_lens[argc] = idp->len;
267 argv_types[argc] = argc + 1;
269 silc_buffer_free(idp);
272 /* Update statistics */
273 server->stat.clients--;
274 if (server->stat.cell_clients)
275 server->stat.cell_clients--;
276 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
277 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
279 if (client->data.public_key)
280 silc_hash_table_del_by_context(server->pk_hash,
281 client->data.public_key,
283 silc_server_remove_clients_channels(server, entry, clients,
285 silc_server_del_from_watcher_list(server, client);
287 /* Remove the client entry */
288 if (!server_signoff) {
289 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
290 id_cache->expire = SILC_ID_CACHE_EXPIRE_DEF;
292 silc_idlist_del_data(client);
293 silc_idlist_del_client(server->global_list, client);
296 if (!silc_idcache_list_next(list, &id_cache))
300 silc_idcache_list_free(list);
303 /* Return now if we are shutting down */
304 if (server->server_shutdown) {
305 silc_hash_table_free(channels);
307 if (server_signoff) {
308 for (i = 0; i < argc; i++)
311 silc_free(argv_lens);
312 silc_free(argv_types);
313 silc_hash_table_free(clients);
318 /* Send the SERVER_SIGNOFF notify */
319 if (server_signoff) {
320 SilcBuffer args, not;
322 SILC_LOG_DEBUG(("Sending SERVER_SIGNOFF for %s with %d clients",
323 silc_id_render(entry->id, SILC_ID_SERVER), argc - 1));
325 /* Send SERVER_SIGNOFF notify to our primary router */
326 if (server->router != entry) {
327 args = silc_argument_payload_encode(1, argv, argv_lens,
329 silc_server_send_notify_args(server, SILC_PRIMARY_ROUTE(server),
330 SILC_BROADCAST(server),
331 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
333 silc_buffer_free(args);
336 /* Send to local clients. We also send the list of client ID's that
337 is to be removed for those servers that would like to use that list. */
338 args = silc_argument_payload_encode(argc, argv, argv_lens,
340 not = silc_notify_payload_encode_args(SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
342 silc_server_packet_send_clients(server, clients,
343 SILC_PACKET_NOTIFY, 0, FALSE,
344 not->data, not->len, FALSE);
346 /* Send notify also to local backup routers */
347 silc_server_backup_send(server, NULL, SILC_PACKET_NOTIFY, 0,
348 not->data, not->len, FALSE, TRUE);
350 silc_buffer_free(args);
351 silc_buffer_free(not);
352 for (i = 0; i < argc; i++)
355 silc_free(argv_lens);
356 silc_free(argv_types);
357 silc_hash_table_free(clients);
360 /* We must now re-generate the channel key for all channels that had
361 this server's client(s) on the channel. As they left the channel we
362 must re-generate the channel key. */
363 silc_hash_table_list(channels, &htl);
364 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
365 if (!silc_server_create_channel_key(server, channel, 0)) {
366 silc_hash_table_list_reset(&htl);
367 silc_hash_table_free(channels);
371 /* Do not send the channel key if private channel key mode is set */
372 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY || !channel->channel_key)
375 silc_server_send_channel_key(server, NULL, channel,
376 server->server_type == SILC_ROUTER ?
377 FALSE : !server->standalone);
379 silc_hash_table_list_reset(&htl);
380 silc_hash_table_free(channels);
385 static SilcServerEntry
386 silc_server_update_clients_by_real_server(SilcServer server,
387 SilcServerEntry from,
389 SilcClientEntry client,
391 SilcIDCacheEntry client_cache)
393 SilcServerEntry server_entry;
394 SilcIDCacheEntry id_cache = NULL;
395 SilcIDCacheList list;
396 bool tolocal = (to == server->id_entry);
398 SILC_LOG_DEBUG(("Start"));
400 if (!silc_idcache_get_all(server->local_list->servers, &list))
403 if (silc_idcache_list_first(list, &id_cache)) {
405 server_entry = (SilcServerEntry)id_cache->context;
406 if (server_entry != from &&
407 (tolocal || server_entry != server->id_entry) &&
408 SILC_ID_COMPARE(server_entry->id, client->id,
409 client->id->ip.data_len)) {
410 SILC_LOG_DEBUG(("Found (local) %s",
411 silc_id_render(server_entry->id, SILC_ID_SERVER)));
413 if (!server_entry->data.send_key && server_entry->router) {
414 SILC_LOG_DEBUG(("Server not locally connected, use its router"));
415 /* If the client is not marked as local then move it to local list
416 since the server is local. */
418 SILC_LOG_DEBUG(("Moving client to local list"));
419 silc_idcache_add(server->local_list->clients, client_cache->name,
420 client_cache->id, client_cache->context,
421 client_cache->expire, NULL);
422 silc_idcache_del_by_context(server->global_list->clients, client);
424 server_entry = server_entry->router;
426 SILC_LOG_DEBUG(("Server locally connected"));
427 /* If the client is not marked as local then move it to local list
428 since the server is local. */
429 if (server_entry->server_type != SILC_BACKUP_ROUTER && !local) {
430 SILC_LOG_DEBUG(("Moving client to local list"));
431 silc_idcache_add(server->local_list->clients, client_cache->name,
432 client_cache->id, client_cache->context,
433 client_cache->expire, NULL);
434 silc_idcache_del_by_context(server->global_list->clients, client);
436 } else if (server->server_type == SILC_BACKUP_ROUTER && local) {
437 /* If we are backup router and this client is on local list, we
438 must move it to global list, as it is not currently local to
439 us (we are not primary). */
440 SILC_LOG_DEBUG(("Moving client to global list"));
441 silc_idcache_add(server->global_list->clients, client_cache->name,
442 client_cache->id, client_cache->context,
443 client_cache->expire, NULL);
444 silc_idcache_del_by_context(server->local_list->clients, client);
448 silc_idcache_list_free(list);
452 if (!silc_idcache_list_next(list, &id_cache))
457 silc_idcache_list_free(list);
459 if (!silc_idcache_get_all(server->global_list->servers, &list))
462 if (silc_idcache_list_first(list, &id_cache)) {
464 server_entry = (SilcServerEntry)id_cache->context;
465 if (server_entry != from && server_entry != server->id_entry &&
466 (tolocal || server_entry != server->id_entry) &&
467 SILC_ID_COMPARE(server_entry->id, client->id,
468 client->id->ip.data_len)) {
469 SILC_LOG_DEBUG(("Found (global) %s",
470 silc_id_render(server_entry->id, SILC_ID_SERVER)));
472 if (!server_entry->data.send_key && server_entry->router) {
473 SILC_LOG_DEBUG(("Server not locally connected, use its router"));
474 /* If the client is marked as local then move it to global list
475 since the server is global. */
477 SILC_LOG_DEBUG(("Moving client to global list"));
478 silc_idcache_add(server->global_list->clients, client_cache->name,
479 client_cache->id, client_cache->context, 0, NULL);
480 silc_idcache_del_by_context(server->local_list->clients, client);
482 server_entry = server_entry->router;
484 SILC_LOG_DEBUG(("Server locally connected"));
485 /* If the client is marked as local then move it to global list
486 since the server is global. */
487 if (server_entry->server_type != SILC_BACKUP_ROUTER && local) {
488 SILC_LOG_DEBUG(("Moving client to global list"));
489 silc_idcache_add(server->global_list->clients, client_cache->name,
490 client_cache->id, client_cache->context, 0, NULL);
491 silc_idcache_del_by_context(server->local_list->clients, client);
495 silc_idcache_list_free(list);
499 if (!silc_idcache_list_next(list, &id_cache))
504 silc_idcache_list_free(list);
509 /* Updates the clients that are originated from the `from' to be originated
510 from the `to'. If the `resolve_real_server' is TRUE then this will
511 attempt to figure out which clients really are originated from the
512 `from' and which are originated from a server that we have connection
513 to, when we've acting as backup router. If it is FALSE the `to' will
514 be the new source. */
516 void silc_server_update_clients_by_server(SilcServer server,
517 SilcServerEntry from,
519 bool resolve_real_server)
521 SilcIDCacheList list = NULL;
522 SilcIDCacheEntry id_cache = NULL;
523 SilcClientEntry client = NULL;
526 if (from && from->id) {
527 SILC_LOG_DEBUG(("Changing from server %s",
528 silc_id_render(from->id, SILC_ID_SERVER)));
531 SILC_LOG_DEBUG(("Changing to server %s",
532 silc_id_render(to->id, SILC_ID_SERVER)));
535 SILC_LOG_DEBUG(("global list"));
537 if (silc_idcache_get_all(server->global_list->clients, &list)) {
538 if (silc_idcache_list_first(list, &id_cache)) {
540 client = (SilcClientEntry)id_cache->context;
542 /* If entry is disabled skip it. If entry is local to us, do not
543 switch it to anyone else, it is ours so skip it. */
544 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
545 SILC_IS_LOCAL(client)) {
546 if (!silc_idcache_list_next(list, &id_cache))
552 SILC_LOG_DEBUG(("Client %s",
553 silc_id_render(client->id, SILC_ID_CLIENT)));
554 if (client->router && client->router->id)
555 SILC_LOG_DEBUG(("Client->router %s",
556 silc_id_render(client->router->id, SILC_ID_SERVER)));
559 if (client->router == from) {
560 if (resolve_real_server) {
562 silc_server_update_clients_by_real_server(server, from, to,
565 if (!client->router) {
566 if (server->server_type == SILC_ROUTER)
567 client->router = from;
576 /* All are changed */
577 if (resolve_real_server)
578 /* Call this so that the entry is moved to correct list if
579 needed. No resolving by real server is actually done. */
580 silc_server_update_clients_by_real_server(server, NULL, to,
587 if (client->router && client->router->id)
588 SILC_LOG_DEBUG(("Client changed to %s",
589 silc_id_render(client->router->id, SILC_ID_SERVER)));
591 if (!silc_idcache_list_next(list, &id_cache))
595 silc_idcache_list_free(list);
598 SILC_LOG_DEBUG(("local list"));
600 if (silc_idcache_get_all(server->local_list->clients, &list)) {
601 if (silc_idcache_list_first(list, &id_cache)) {
603 client = (SilcClientEntry)id_cache->context;
605 /* If entry is disabled skip it. If entry is local to us, do not
606 switch it to anyone else, it is ours so skip it. */
607 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
608 SILC_IS_LOCAL(client)) {
609 if (!silc_idcache_list_next(list, &id_cache))
615 SILC_LOG_DEBUG(("Client %s",
616 silc_id_render(client->id, SILC_ID_CLIENT)));
617 if (client->router && client->router->id)
618 SILC_LOG_DEBUG(("Client->router %s",
619 silc_id_render(client->router->id, SILC_ID_SERVER)));
622 if (client->router == from) {
623 if (resolve_real_server) {
625 silc_server_update_clients_by_real_server(server, from, to,
629 client->router = from;
635 /* All are changed */
636 if (resolve_real_server)
637 /* Call this so that the entry is moved to correct list if
638 needed. No resolving by real server is actually done. */
639 silc_server_update_clients_by_real_server(server, NULL, to,
646 if (client->router && client->router->id)
647 SILC_LOG_DEBUG(("Client changed to %s",
648 silc_id_render(client->router->id, SILC_ID_SERVER)));
650 if (!silc_idcache_list_next(list, &id_cache))
654 silc_idcache_list_free(list);
658 /* Updates servers that are from `from' to be originated from `to'. This
659 will also update the server's connection to `to's connection. */
661 void silc_server_update_servers_by_server(SilcServer server,
662 SilcServerEntry from,
665 SilcIDCacheList list = NULL;
666 SilcIDCacheEntry id_cache = NULL;
667 SilcServerEntry server_entry = NULL;
669 SILC_LOG_DEBUG(("Updating servers"));
671 if (silc_idcache_get_all(server->local_list->servers, &list)) {
672 if (silc_idcache_list_first(list, &id_cache)) {
674 server_entry = (SilcServerEntry)id_cache->context;
676 /* If entry is local to us, do not switch it to any anyone else,
678 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
679 server_entry == from) {
680 if (!silc_idcache_list_next(list, &id_cache))
686 /* If we are standalone router, any server that is not directly
687 connected to cannot exist anymore. If we are not standalone
688 we update it correctly. */
689 if (server->server_type == SILC_ROUTER && server->standalone) {
690 silc_server_backup_del(server, server_entry);
691 silc_server_backup_replaced_del(server, server_entry);
692 silc_idlist_del_data(server_entry);
693 silc_idlist_del_server(server->local_list, server_entry);
694 server->stat.servers--;
695 server->stat.cell_servers--;
697 /* XXX if we are not standalone, do a check from local config
698 whether this server is in our cell, but not connected to
699 us (in which case we must remove it). */
702 if (server_entry->router == from) {
703 SILC_LOG_DEBUG(("Updating server (local) %s",
704 server_entry->server_name ?
705 server_entry->server_name : ""));
706 server_entry->router = to;
707 server_entry->connection = to->connection;
711 SILC_LOG_DEBUG(("Updating server (local) %s",
712 server_entry->server_name ?
713 server_entry->server_name : ""));
714 server_entry->router = to;
715 server_entry->connection = to->connection;
719 if (!silc_idcache_list_next(list, &id_cache))
723 silc_idcache_list_free(list);
726 if (silc_idcache_get_all(server->global_list->servers, &list)) {
727 if (silc_idcache_list_first(list, &id_cache)) {
729 server_entry = (SilcServerEntry)id_cache->context;
731 /* If entry is local to us, do not switch it to anyone else,
733 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
734 server_entry == from) {
735 if (!silc_idcache_list_next(list, &id_cache))
741 /* If we are standalone router, any server that is not directly
742 connected to cannot exist anymore. If we are not standalone
743 we update it correctly. */
744 if (server->server_type == SILC_ROUTER && server->standalone) {
745 silc_server_backup_del(server, server_entry);
746 silc_server_backup_replaced_del(server, server_entry);
747 silc_idlist_del_data(server_entry);
748 silc_idlist_del_server(server->global_list, server_entry);
749 server->stat.servers--;
750 server->stat.cell_servers--;
752 /* XXX if we are not standalone, do a check from local config
753 whether this server is in our cell, but not connected to
754 us (in which case we must remove it). */
757 if (server_entry->router == from) {
758 SILC_LOG_DEBUG(("Updating server (global) %s",
759 server_entry->server_name ?
760 server_entry->server_name : ""));
761 server_entry->router = to;
762 server_entry->connection = to->connection;
766 SILC_LOG_DEBUG(("Updating server (global) %s",
767 server_entry->server_name ?
768 server_entry->server_name : ""));
769 server_entry->router = to;
770 server_entry->connection = to->connection;
774 if (!silc_idcache_list_next(list, &id_cache))
778 silc_idcache_list_free(list);
783 /* Toggles the enabled/disabled status of local server connections. Packets
784 can be sent to the servers when `toggle_enabled' is TRUE and will be
785 dropped if `toggle_enabled' is FALSE, after this function is called. */
787 void silc_server_local_servers_toggle_enabled(SilcServer server,
790 SilcIDCacheList list = NULL;
791 SilcIDCacheEntry id_cache = NULL;
792 SilcServerEntry server_entry = NULL;
794 if (silc_idcache_get_all(server->local_list->servers, &list)) {
795 if (silc_idcache_list_first(list, &id_cache)) {
797 server_entry = (SilcServerEntry)id_cache->context;
798 if (!SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry) {
799 if (!silc_idcache_list_next(list, &id_cache))
806 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
808 server_entry->data.status |= SILC_IDLIST_STATUS_DISABLED;
810 if (!silc_idcache_list_next(list, &id_cache))
814 silc_idcache_list_free(list);
817 if (silc_idcache_get_all(server->global_list->servers, &list)) {
818 if (silc_idcache_list_first(list, &id_cache)) {
820 server_entry = (SilcServerEntry)id_cache->context;
821 if (!SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry) {
822 if (!silc_idcache_list_next(list, &id_cache))
829 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
831 server_entry->data.status |= SILC_IDLIST_STATUS_DISABLED;
833 if (!silc_idcache_list_next(list, &id_cache))
837 silc_idcache_list_free(list);
841 /* Removes servers that are originated from the `from'. The server
842 entry is deleted in this function. If `remove_clients' is TRUE then
843 all clients originated from the server are removed too, and server
844 signoff is sent. Note that this does not remove the `from'. This
845 also does not remove locally connected servers. */
847 void silc_server_remove_servers_by_server(SilcServer server,
848 SilcServerEntry from,
851 SilcIDCacheList list = NULL;
852 SilcIDCacheEntry id_cache = NULL;
853 SilcServerEntry server_entry = NULL;
855 SILC_LOG_DEBUG(("Removing servers by %s",
856 from->server_name ? from->server_name : "server"));
858 if (silc_idcache_get_all(server->local_list->servers, &list)) {
859 if (silc_idcache_list_first(list, &id_cache)) {
861 server_entry = (SilcServerEntry)id_cache->context;
862 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
863 server_entry->router != from || server_entry == from) {
864 if (!silc_idcache_list_next(list, &id_cache))
870 /* Remove clients owned by this server */
872 silc_server_remove_clients_by_server(server, from, server_entry,
875 /* Remove the server */
876 silc_idlist_del_server(server->local_list, server_entry);
878 if (!silc_idcache_list_next(list, &id_cache))
882 silc_idcache_list_free(list);
885 if (silc_idcache_get_all(server->global_list->servers, &list)) {
886 if (silc_idcache_list_first(list, &id_cache)) {
888 server_entry = (SilcServerEntry)id_cache->context;
889 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
890 server_entry->router != from || server_entry == from) {
891 if (!silc_idcache_list_next(list, &id_cache))
897 /* Remove clients owned by this server */
899 silc_server_remove_clients_by_server(server, from, server_entry,
902 /* Remove the server */
903 silc_idlist_del_server(server->global_list, server_entry);
905 if (!silc_idcache_list_next(list, &id_cache))
909 silc_idcache_list_free(list);
913 /* Removes channels that are from `from. */
915 void silc_server_remove_channels_by_server(SilcServer server,
916 SilcServerEntry from)
918 SilcIDCacheList list = NULL;
919 SilcIDCacheEntry id_cache = NULL;
920 SilcChannelEntry channel = NULL;
922 SILC_LOG_DEBUG(("Removing channels by server"));
924 if (silc_idcache_get_all(server->global_list->channels, &list)) {
925 if (silc_idcache_list_first(list, &id_cache)) {
927 channel = (SilcChannelEntry)id_cache->context;
928 if (channel->router == from)
929 silc_idlist_del_channel(server->global_list, channel);
930 if (!silc_idcache_list_next(list, &id_cache))
934 silc_idcache_list_free(list);
938 /* Updates channels that are from `from' to be originated from `to'. */
940 void silc_server_update_channels_by_server(SilcServer server,
941 SilcServerEntry from,
944 SilcIDCacheList list = NULL;
945 SilcIDCacheEntry id_cache = NULL;
946 SilcChannelEntry channel = NULL;
948 SILC_LOG_DEBUG(("Updating channels by server"));
950 if (silc_idcache_get_all(server->global_list->channels, &list)) {
951 if (silc_idcache_list_first(list, &id_cache)) {
953 channel = (SilcChannelEntry)id_cache->context;
955 if (channel->router == from)
956 channel->router = to;
959 channel->router = to;
961 if (!silc_idcache_list_next(list, &id_cache))
965 silc_idcache_list_free(list);
969 /* Checks whether given channel has global users. If it does this returns
970 TRUE and FALSE if there is only locally connected clients on the channel. */
972 bool silc_server_channel_has_global(SilcChannelEntry channel)
974 SilcChannelClientEntry chl;
975 SilcHashTableList htl;
977 silc_hash_table_list(channel->user_list, &htl);
978 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
979 if (chl->client->router) {
980 silc_hash_table_list_reset(&htl);
984 silc_hash_table_list_reset(&htl);
989 /* Checks whether given channel has locally connected users. If it does this
990 returns TRUE and FALSE if there is not one locally connected client. */
992 bool silc_server_channel_has_local(SilcChannelEntry channel)
994 SilcChannelClientEntry chl;
995 SilcHashTableList htl;
997 silc_hash_table_list(channel->user_list, &htl);
998 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
999 if (SILC_IS_LOCAL(chl->client)) {
1000 silc_hash_table_list_reset(&htl);
1004 silc_hash_table_list_reset(&htl);
1009 /* This function removes the channel and all users on the channel, unless
1010 the channel is permanent. In this case the channel is disabled but all
1011 users are removed from the channel. Returns TRUE if the channel is
1012 destroyed totally, and FALSE if it is permanent and remains. */
1014 bool silc_server_channel_delete(SilcServer server,
1015 SilcChannelEntry channel)
1017 SilcChannelClientEntry chl;
1018 SilcHashTableList htl;
1019 bool delchan = !(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH);
1022 /* Update statistics */
1023 if (server->server_type == SILC_ROUTER)
1024 server->stat.chanclients -= channel->user_count;
1026 /* Totally delete the channel and all users on the channel. The
1027 users are deleted automatically in silc_idlist_del_channel. */
1028 channel->disabled = TRUE;
1029 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
1030 if (silc_idlist_del_channel(server->local_list, channel)) {
1031 server->stat.my_channels--;
1032 if (server->server_type == SILC_ROUTER) {
1033 server->stat.channels--;
1034 server->stat.cell_channels--;
1037 if (silc_idlist_del_channel(server->global_list, channel))
1038 if (server->server_type == SILC_ROUTER)
1039 server->stat.channels--;
1045 /* Channel is permanent, do not remove it, remove only users */
1046 channel->disabled = TRUE;
1047 silc_hash_table_list(channel->user_list, &htl);
1048 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
1049 silc_hash_table_del(chl->client->channels, channel);
1050 silc_hash_table_del(channel->user_list, chl->client);
1051 channel->user_count--;
1053 /* Update statistics */
1054 if (SILC_IS_LOCAL(chl->client))
1055 server->stat.my_chanclients--;
1056 if (server->server_type == SILC_ROUTER) {
1057 server->stat.cell_chanclients--;
1058 server->stat.chanclients--;
1063 silc_hash_table_list_reset(&htl);
1065 SILC_LOG_DEBUG(("Channel %s remains", channel->channel_name));
1070 /* Returns TRUE if the given client is on the channel. FALSE if not.
1071 This works because we assure that the user list on the channel is
1072 always in up to date thus we can only check the channel list from
1073 `client' which is faster than checking the user list from `channel'. */
1075 bool silc_server_client_on_channel(SilcClientEntry client,
1076 SilcChannelEntry channel,
1077 SilcChannelClientEntry *chl)
1079 if (!client || !channel)
1082 return silc_hash_table_find(client->channels, channel, NULL,
1086 /* Checks string for bad characters and returns TRUE if they are found. */
1088 bool silc_server_name_bad_chars(const char *name, SilcUInt32 name_len)
1092 for (i = 0; i < name_len; i++) {
1093 if (!isascii(name[i]))
1095 if (name[i] <= 32) return TRUE;
1096 if (name[i] == ' ') return TRUE;
1097 if (name[i] == '*') return TRUE;
1098 if (name[i] == '?') return TRUE;
1099 if (name[i] == ',') return TRUE;
1100 if (name[i] == '@') return TRUE;
1101 if (name[i] == '!') return TRUE;
1107 /* Same as silc_server_name_bad_chars but check for channel names. */
1109 bool silc_server_name_bad_chchars(const char *name, SilcUInt32 name_len)
1113 for (i = 0; i < name_len; i++) {
1114 if (!isascii(name[i]))
1116 if (name[i] <= 32) return TRUE;
1117 if (name[i] == ' ') return TRUE;
1118 if (name[i] == '*') return TRUE;
1119 if (name[i] == '?') return TRUE;
1120 if (name[i] == ',') return TRUE;
1126 /* Modifies the `name' if it includes bad characters and returns new
1127 allocated name that does not include bad characters. */
1129 char *silc_server_name_modify_bad(const char *name, SilcUInt32 name_len)
1132 char *newname = strdup(name);
1134 for (i = 0; i < name_len; i++) {
1135 if (!isascii(newname[i])) newname[i] = '_';
1136 if (newname[i] <= 32) newname[i] = '_';
1137 if (newname[i] == ' ') newname[i] = '_';
1138 if (newname[i] == '*') newname[i] = '_';
1139 if (newname[i] == '?') newname[i] = '_';
1140 if (newname[i] == ',') newname[i] = '_';
1146 /* Find number of sockets by IP address indicated by `ip'. Returns 0 if
1147 socket connections with the IP address does not exist. */
1149 SilcUInt32 silc_server_num_sockets_by_ip(SilcServer server, const char *ip,
1150 SilcSocketType type)
1154 for (i = 0, count = 0; i < server->config->param.connections_max; i++) {
1155 if (server->sockets[i] && !SILC_IS_LISTENER(server->sockets[i]) &&
1156 !strcmp(server->sockets[i]->ip, ip) &&
1157 server->sockets[i]->type == type)
1164 /* Find number of sockets by IP address indicated by remote host, indicatd
1165 by `ip' or `hostname', `port', and `type'. Returns 0 if socket connections
1166 does not exist. If `ip' is provided then `hostname' is ignored. */
1168 SilcUInt32 silc_server_num_sockets_by_remote(SilcServer server,
1170 const char *hostname,
1172 SilcSocketType type)
1176 if (!ip && !hostname)
1179 for (i = 0, count = 0; i < server->config->param.connections_max; i++) {
1180 if (server->sockets[i] && !SILC_IS_LISTENER(server->sockets[i]) &&
1181 ((ip && !strcmp(server->sockets[i]->ip, ip)) ||
1182 (hostname && !strcmp(server->sockets[i]->hostname, hostname))) &&
1183 server->sockets[i]->port == port &&
1184 server->sockets[i]->type == type)
1191 /* Finds locally cached public key by the public key received in the SKE.
1192 If we have it locally cached then we trust it and will use it in the
1193 authentication protocol. Returns the locally cached public key or NULL
1194 if we do not find the public key. */
1196 SilcPublicKey silc_server_find_public_key(SilcServer server,
1197 SilcHashTable local_public_keys,
1198 SilcPublicKey remote_public_key)
1200 SilcPublicKey cached_key;
1202 SILC_LOG_DEBUG(("Find remote public key (%d keys in local cache)",
1203 silc_hash_table_count(local_public_keys)));
1205 if (!silc_hash_table_find_ext(local_public_keys, remote_public_key,
1206 (void *)&cached_key, NULL,
1207 silc_hash_public_key, NULL,
1208 silc_hash_public_key_compare, NULL)) {
1209 SILC_LOG_ERROR(("Public key not found"));
1213 SILC_LOG_DEBUG(("Found public key"));
1218 /* This returns the first public key from the table of public keys. This
1219 is used only in cases where single public key exists in the table and
1220 we want to get a pointer to it. For public key tables that has multiple
1221 keys in it the silc_server_find_public_key must be used. */
1223 SilcPublicKey silc_server_get_public_key(SilcServer server,
1224 SilcHashTable local_public_keys)
1226 SilcPublicKey cached_key;
1227 SilcHashTableList htl;
1229 SILC_LOG_DEBUG(("Start"));
1231 assert(silc_hash_table_count(local_public_keys) < 2);
1233 silc_hash_table_list(local_public_keys, &htl);
1234 if (!silc_hash_table_get(&htl, NULL, (void *)&cached_key)) {
1235 silc_hash_table_list_reset(&htl);
1238 silc_hash_table_list_reset(&htl);
1243 /* Check whether the connection `sock' is allowed to connect to us. This
1244 checks for example whether there is too much connections for this host,
1245 and required version for the host etc. */
1247 bool silc_server_connection_allowed(SilcServer server,
1248 SilcSocketConnection sock,
1249 SilcSocketType type,
1250 SilcServerConfigConnParams *global,
1251 SilcServerConfigConnParams *params,
1254 SilcUInt32 conn_number = (type == SILC_SOCKET_TYPE_CLIENT ?
1255 server->stat.my_clients :
1256 type == SILC_SOCKET_TYPE_SERVER ?
1257 server->stat.my_servers :
1258 server->stat.my_routers);
1259 SilcUInt32 num_sockets, max_hosts, max_per_host;
1260 SilcUInt32 r_protocol_version, l_protocol_version;
1261 SilcUInt32 r_software_version, l_software_version;
1262 char *r_vendor_version = NULL, *l_vendor_version;
1264 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
1268 l_protocol_version =
1269 silc_version_to_num(params && params->version_protocol ?
1270 params->version_protocol :
1271 global->version_protocol);
1272 l_software_version =
1273 silc_version_to_num(params && params->version_software ?
1274 params->version_software :
1275 global->version_software);
1276 l_vendor_version = (params && params->version_software_vendor ?
1277 params->version_software_vendor :
1278 global->version_software_vendor);
1280 if (ske && silc_ske_parse_version(ske, &r_protocol_version, NULL,
1281 &r_software_version, NULL,
1282 &r_vendor_version)) {
1283 sock->version = r_protocol_version;
1285 /* Match protocol version */
1286 if (l_protocol_version && r_protocol_version &&
1287 r_protocol_version < l_protocol_version) {
1288 SILC_LOG_INFO(("Connection %s (%s) is too old version",
1289 sock->hostname, sock->ip));
1290 sock->protocol = NULL;
1291 silc_server_disconnect_remote(server, sock,
1292 SILC_STATUS_ERR_BAD_VERSION,
1293 "You support too old protocol version");
1297 /* Math software version */
1298 if (l_software_version && r_software_version &&
1299 r_software_version < l_software_version) {
1300 SILC_LOG_INFO(("Connection %s (%s) is too old version",
1301 sock->hostname, sock->ip));
1302 sock->protocol = NULL;
1303 silc_server_disconnect_remote(server, sock,
1304 SILC_STATUS_ERR_BAD_VERSION,
1305 "You support too old software version");
1309 /* Regex match vendor version */
1310 if (l_vendor_version && r_vendor_version &&
1311 !silc_string_match(l_vendor_version, r_vendor_version)) {
1312 SILC_LOG_INFO(("Connection %s (%s) is unsupported version",
1313 sock->hostname, sock->ip));
1314 sock->protocol = NULL;
1315 silc_server_disconnect_remote(server, sock,
1316 SILC_STATUS_ERR_BAD_VERSION,
1317 "Your software is not supported");
1321 silc_free(r_vendor_version);
1323 /* Check for maximum connections limit */
1325 num_sockets = silc_server_num_sockets_by_ip(server, sock->ip, type);
1326 max_hosts = (params ? params->connections_max : global->connections_max);
1327 max_per_host = (params ? params->connections_max_per_host :
1328 global->connections_max_per_host);
1330 if (max_hosts && conn_number >= max_hosts) {
1331 SILC_LOG_INFO(("Server is full, closing %s (%s) connection",
1332 sock->hostname, sock->ip));
1333 sock->protocol = NULL;
1334 silc_server_disconnect_remote(server, sock,
1335 SILC_STATUS_ERR_RESOURCE_LIMIT,
1336 "Server is full, try again later");
1340 if (num_sockets >= max_per_host) {
1341 SILC_LOG_INFO(("Too many connections from %s (%s), closing connection",
1342 sock->hostname, sock->ip));
1343 sock->protocol = NULL;
1344 silc_server_disconnect_remote(server, sock,
1345 SILC_STATUS_ERR_RESOURCE_LIMIT,
1346 "Too many connections from your host");
1353 /* Checks that client has rights to add or remove channel modes. If any
1354 of the checks fails FALSE is returned. */
1356 bool silc_server_check_cmode_rights(SilcServer server,
1357 SilcChannelEntry channel,
1358 SilcChannelClientEntry client,
1361 bool is_op = client->mode & SILC_CHANNEL_UMODE_CHANOP;
1362 bool is_fo = client->mode & SILC_CHANNEL_UMODE_CHANFO;
1364 /* Check whether has rights to change anything */
1365 if (!is_op && !is_fo)
1368 /* Check whether has rights to change everything */
1372 /* Founder implies operator */
1376 /* We know that client is channel operator, check that they are not
1377 changing anything that requires channel founder rights. Rest of the
1378 modes are available automatically for channel operator. */
1380 if (mode & SILC_CHANNEL_MODE_PRIVKEY) {
1381 if (is_op && !is_fo)
1384 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
1385 if (is_op && !is_fo)
1390 if (mode & SILC_CHANNEL_MODE_PASSPHRASE) {
1391 if (!(channel->mode & SILC_CHANNEL_MODE_PASSPHRASE)) {
1392 if (is_op && !is_fo)
1396 if (channel->mode & SILC_CHANNEL_MODE_PASSPHRASE) {
1397 if (is_op && !is_fo)
1402 if (mode & SILC_CHANNEL_MODE_CIPHER) {
1403 if (!(channel->mode & SILC_CHANNEL_MODE_CIPHER)) {
1404 if (is_op && !is_fo)
1408 if (channel->mode & SILC_CHANNEL_MODE_CIPHER) {
1409 if (is_op && !is_fo)
1414 if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
1415 if (!(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH)) {
1416 if (is_op && !is_fo)
1420 if (channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
1421 if (is_op && !is_fo)
1426 if (mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
1427 if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS)) {
1428 if (is_op && !is_fo)
1432 if (channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
1433 if (is_op && !is_fo)
1438 if (mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
1439 if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS)) {
1440 if (is_op && !is_fo)
1444 if (channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
1445 if (is_op && !is_fo)
1450 if (mode & SILC_CHANNEL_MODE_CHANNEL_AUTH) {
1451 if (!(channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH)) {
1452 if (is_op && !is_fo)
1456 if (channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH) {
1457 if (is_op && !is_fo)
1465 /* Check that the client has rights to change its user mode. Returns
1466 FALSE if setting some mode is not allowed. */
1468 bool silc_server_check_umode_rights(SilcServer server,
1469 SilcClientEntry client,
1472 bool server_op = FALSE, router_op = FALSE;
1474 if (mode & SILC_UMODE_SERVER_OPERATOR) {
1475 /* Cannot set server operator mode (must use OPER command) */
1476 if (!(client->mode & SILC_UMODE_SERVER_OPERATOR))
1479 /* Remove the server operator rights */
1480 if (client->mode & SILC_UMODE_SERVER_OPERATOR)
1484 if (mode & SILC_UMODE_ROUTER_OPERATOR) {
1485 /* Cannot set router operator mode (must use SILCOPER command) */
1486 if (!(client->mode & SILC_UMODE_ROUTER_OPERATOR))
1489 /* Remove the router operator rights */
1490 if (client->mode & SILC_UMODE_ROUTER_OPERATOR)
1495 SILC_UMODE_STATS_UPDATE(server, SILC_UMODE_SERVER_OPERATOR);
1497 SILC_UMODE_STATS_UPDATE(router, SILC_UMODE_ROUTER_OPERATOR);
1502 /* This function is used to send the notify packets and motd to the
1503 incoming client connection. */
1505 void silc_server_send_connect_notifys(SilcServer server,
1506 SilcSocketConnection sock,
1507 SilcClientEntry client)
1509 SilcIDListData idata = (SilcIDListData)client;
1511 SILC_LOG_DEBUG(("Send welcome notifys"));
1513 /* Send some nice info to the client */
1514 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1515 ("Welcome to the SILC Network %s",
1517 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1518 ("Your host is %s, running version %s",
1519 server->server_name, server_version));
1521 if (server->server_type == SILC_ROUTER) {
1522 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1523 ("There are %d clients, %d servers and %d "
1524 "routers in SILC Network",
1525 server->stat.clients, server->stat.servers,
1526 server->stat.routers));
1528 if (server->stat.clients && server->stat.servers + 1)
1529 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1530 ("There are %d clients, %d servers and %d "
1531 "routers in SILC Network",
1532 server->stat.clients, server->stat.servers,
1533 (server->standalone ? 0 :
1534 !server->stat.routers ? 1 :
1535 server->stat.routers)));
1538 if (server->stat.cell_clients && server->stat.cell_servers + 1)
1539 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1540 ("There are %d clients on %d server in our cell",
1541 server->stat.cell_clients,
1542 server->stat.cell_servers));
1543 if (server->server_type == SILC_ROUTER) {
1544 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1545 ("I have %d clients, %d channels, %d servers and "
1547 server->stat.my_clients,
1548 server->stat.my_channels,
1549 server->stat.my_servers,
1550 server->stat.my_routers));
1552 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1553 ("I have %d clients and %d channels formed",
1554 server->stat.my_clients,
1555 server->stat.my_channels));
1558 if (server->stat.server_ops || server->stat.router_ops)
1559 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1560 ("There are %d server operators and %d router "
1562 server->stat.server_ops,
1563 server->stat.router_ops));
1564 if (server->stat.my_router_ops + server->stat.my_server_ops)
1565 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1566 ("I have %d operators online",
1567 server->stat.my_router_ops +
1568 server->stat.my_server_ops));
1570 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1571 ("Your connection is secured with %s cipher, "
1572 "key length %d bits",
1573 silc_cipher_get_name(idata->send_key),
1574 silc_cipher_get_key_len(idata->send_key)));
1575 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1576 ("Your current nickname is %s",
1580 silc_server_send_motd(server, sock);
1583 /* Kill the client indicated by `remote_client' sending KILLED notify
1584 to the client, to all channels client has joined and to primary
1585 router if needed. The killed client is also removed from all channels. */
1587 void silc_server_kill_client(SilcServer server,
1588 SilcClientEntry remote_client,
1589 const char *comment,
1591 SilcIdType killer_id_type)
1593 SilcBuffer killed, killer;
1595 SILC_LOG_DEBUG(("Killing client %s",
1596 silc_id_render(remote_client->id, SILC_ID_CLIENT)));
1598 /* Send the KILL notify packets. First send it to the channel, then
1599 to our primary router and then directly to the client who is being
1600 killed right now. */
1602 killed = silc_id_payload_encode(remote_client->id, SILC_ID_CLIENT);
1603 killer = silc_id_payload_encode(killer_id, killer_id_type);
1605 /* Send KILLED notify to the channels. It is not sent to the client
1606 as it will be sent differently destined directly to the client and not
1608 silc_server_send_notify_on_channels(server, remote_client,
1609 remote_client, SILC_NOTIFY_TYPE_KILLED,
1610 3, killed->data, killed->len,
1611 comment, comment ? strlen(comment) : 0,
1612 killer->data, killer->len);
1614 /* Send KILLED notify to primary route */
1615 silc_server_send_notify_killed(server, SILC_PRIMARY_ROUTE(server),
1616 SILC_BROADCAST(server), remote_client->id,
1617 comment, killer_id, killer_id_type);
1619 /* Send KILLED notify to the client directly */
1620 if (remote_client->connection || remote_client->router)
1621 silc_server_send_notify_killed(server, remote_client->connection ?
1622 remote_client->connection :
1623 remote_client->router->connection, FALSE,
1624 remote_client->id, comment,
1625 killer_id, killer_id_type);
1627 /* Remove the client from all channels. This generates new keys to the
1628 channels as well. */
1629 silc_server_remove_from_channels(server, NULL, remote_client, FALSE,
1632 /* Remove the client entry, If it is locally connected then we will also
1633 disconnect the client here */
1634 if (remote_client->connection) {
1635 /* Remove locally conneted client */
1636 SilcSocketConnection sock = remote_client->connection;
1637 silc_server_free_client_data(server, sock, remote_client, FALSE, NULL);
1638 silc_server_close_connection(server, sock);
1640 /* Update statistics */
1641 server->stat.clients--;
1642 if (server->stat.cell_clients)
1643 server->stat.cell_clients--;
1644 SILC_OPER_STATS_UPDATE(remote_client, server, SILC_UMODE_SERVER_OPERATOR);
1645 SILC_OPER_STATS_UPDATE(remote_client, router, SILC_UMODE_ROUTER_OPERATOR);
1647 if (remote_client->data.public_key)
1648 silc_hash_table_del_by_context(server->pk_hash,
1649 remote_client->data.public_key,
1652 if (SILC_IS_LOCAL(remote_client)) {
1653 server->stat.my_clients--;
1654 silc_schedule_task_del_by_context(server->schedule, remote_client);
1655 silc_idlist_del_data(remote_client);
1658 /* Remove remote client */
1659 silc_idlist_del_data(remote_client);
1660 if (!silc_idlist_del_client(server->global_list, remote_client)) {
1661 /* Remove this client from watcher list if it is */
1662 silc_server_del_from_watcher_list(server, remote_client);
1663 silc_idlist_del_client(server->local_list, remote_client);
1667 silc_buffer_free(killer);
1668 silc_buffer_free(killed);
1673 SilcClientEntry client;
1674 SilcNotifyType notify;
1675 const char *new_nick;
1676 } WatcherNotifyContext;
1679 silc_server_check_watcher_list_foreach(void *key, void *context,
1682 WatcherNotifyContext *notify = user_context;
1683 SilcClientEntry entry = context;
1684 SilcSocketConnection sock;
1689 if (entry == notify->client)
1692 sock = silc_server_get_client_route(notify->server, NULL, 0, entry->id,
1695 SILC_LOG_DEBUG(("Sending WATCH notify to %s",
1696 silc_id_render(entry->id, SILC_ID_CLIENT)));
1698 /* Send the WATCH notify */
1699 silc_server_send_notify_watch(notify->server, sock, entry,
1701 notify->new_nick ? notify->new_nick :
1702 (const char *)notify->client->nickname,
1707 /* This function checks whether the `client' nickname and/or 'client'
1708 public key is being watched by someone, and notifies the watcher of the
1709 notify change of notify type indicated by `notify'. */
1711 bool silc_server_check_watcher_list(SilcServer server,
1712 SilcClientEntry client,
1713 const char *new_nick,
1714 SilcNotifyType notify)
1716 unsigned char hash[16];
1717 WatcherNotifyContext n;
1719 SILC_LOG_DEBUG(("Checking watcher list %s",
1720 client->nickname ? client->nickname : (unsigned char *)""));
1722 /* If the watching is rejected by the client do nothing */
1723 if (client->mode & SILC_UMODE_REJECT_WATCHING)
1726 /* Make hash from the nick, or take it from Client ID */
1727 if (client->nickname) {
1729 memset(nick, 0, sizeof(nick));
1730 silc_to_lower(client->nickname, nick, sizeof(nick) - 1);
1731 silc_hash_make(server->md5hash, nick, strlen(nick), hash);
1733 memset(hash, 0, sizeof(hash));
1734 memcpy(hash, client->id->hash, sizeof(client->id->hash));
1739 n.new_nick = new_nick;
1742 /* Send notify to all watchers watching this nickname */
1743 silc_hash_table_find_foreach(server->watcher_list, hash,
1744 silc_server_check_watcher_list_foreach, &n);
1746 /* Send notify to all watchers watching this public key */
1747 if (client->data.public_key)
1748 silc_hash_table_find_foreach(server->watcher_list_pk,
1749 client->data.public_key,
1750 silc_server_check_watcher_list_foreach,
1756 /* Remove the `client' from watcher list. After calling this the `client'
1757 is not watching any nicknames. */
1759 bool silc_server_del_from_watcher_list(SilcServer server,
1760 SilcClientEntry client)
1762 SilcHashTableList htl;
1764 SilcClientEntry entry;
1767 silc_hash_table_list(server->watcher_list, &htl);
1768 while (silc_hash_table_get(&htl, &key, (void *)&entry)) {
1769 if (entry == client) {
1770 silc_hash_table_del_by_context(server->watcher_list, key, client);
1773 SILC_LOG_DEBUG(("Removing %s from WATCH list",
1774 silc_id_render(client->id, SILC_ID_CLIENT)));
1776 /* Now check whether there still exists entries with this key, if not
1777 then free the key to not leak memory. */
1778 if (!silc_hash_table_find(server->watcher_list, key, NULL, NULL))
1784 silc_hash_table_list_reset(&htl);
1789 /* Force the client indicated by `chl' to change the channel user mode
1790 on channel indicated by `channel' to `forced_mode'. */
1792 bool silc_server_force_cumode_change(SilcServer server,
1793 SilcSocketConnection sock,
1794 SilcChannelEntry channel,
1795 SilcChannelClientEntry chl,
1796 SilcUInt32 forced_mode)
1798 SilcBuffer idp1, idp2;
1799 unsigned char cumode[4];
1801 SILC_LOG_DEBUG(("Enforcing sender to change mode"));
1804 silc_server_send_notify_cumode(server, sock, FALSE, channel, forced_mode,
1805 server->id, SILC_ID_SERVER,
1806 chl->client->id, NULL);
1808 idp1 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
1809 idp2 = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
1810 SILC_PUT32_MSB(forced_mode, cumode);
1811 silc_server_send_notify_to_channel(server, sock, channel, FALSE, TRUE,
1812 SILC_NOTIFY_TYPE_CUMODE_CHANGE,
1813 3, idp1->data, idp1->len,
1814 cumode, sizeof(cumode),
1815 idp2->data, idp2->len);
1816 silc_buffer_free(idp1);
1817 silc_buffer_free(idp2);
1822 /* Find active socket connection by the IP address and port indicated by
1823 `ip' and `port', and socket connection type of `type'. */
1825 SilcSocketConnection
1826 silc_server_find_socket_by_host(SilcServer server,
1827 SilcSocketType type,
1828 const char *ip, SilcUInt16 port)
1832 for (i = 0; i < server->config->param.connections_max; i++) {
1833 if (!server->sockets[i])
1835 if (!strcmp(server->sockets[i]->ip, ip) &&
1836 (!port || server->sockets[i]->port == port) &&
1837 server->sockets[i]->type == type)
1838 return server->sockets[i];
1844 /* This function can be used to match the invite and ban lists. */
1846 bool silc_server_inviteban_match(SilcServer server, SilcHashTable list,
1847 SilcUInt8 type, void *check)
1849 unsigned char *tmp = NULL;
1850 SilcUInt32 len = 0, t;
1851 SilcHashTableList htl;
1852 SilcBuffer entry, idp = NULL, pkp = NULL;
1855 if (type < 1 || type > 3 || !check)
1859 tmp = strdup((char *)check);
1864 pkp = silc_pkcs_public_key_payload_encode(check);
1871 idp = silc_id_payload_encode(check, SILC_ID_CLIENT);
1878 /* Compare the list */
1879 silc_hash_table_list(list, &htl);
1880 while (silc_hash_table_get(&htl, (void *)&t, (void *)&entry)) {
1883 if (silc_string_match(entry->data, tmp)) {
1887 } else if (!memcmp(entry->data, tmp, len)) {
1893 silc_hash_table_list_reset(&htl);
1897 silc_buffer_free(idp);
1898 silc_buffer_free(pkp);
1902 /* Process invite or ban information */
1904 void silc_server_inviteban_process(SilcServer server, SilcHashTable list,
1905 SilcUInt8 action, SilcArgumentPayload args)
1908 SilcUInt32 type, len;
1910 SilcHashTableList htl;
1912 SILC_LOG_DEBUG(("Processing invite/ban for %s action",
1913 action == 0x01 ? "DEL" : "ADD"));
1915 /* Add the information to invite list */
1916 if (action == 0x00 || action == 0x03) {
1917 /* Traverse all arguments and add to the hash table according to
1919 tmp = silc_argument_get_first_arg(args, &type, &len);
1922 /* Invite string. Get the old invite string from hash table
1923 and append this at the end of the existing one. */
1924 if (!silc_hash_table_find(list, (void *)1, NULL, (void *)&tmp2)) {
1925 tmp2 = silc_calloc(1, sizeof(*tmp2));
1926 silc_hash_table_add(list, (void *)1, tmp2);
1929 /* Check that the string is not part of invite string already */
1930 if (action == 0x00) {
1931 if (silc_string_match(tmp2->data, tmp))
1935 if (tmp[len - 1] == ',')
1936 tmp[len - 1] = '\0';
1937 silc_buffer_strformat(tmp2, tmp, SILC_STR_END);
1938 silc_buffer_strformat(tmp2, ",", SILC_STR_END);
1941 /* Announced list. Check each entry in the list */
1942 unsigned char e[256];
1943 char *start, *end, *n, *rtmp;
1946 rtmp = silc_memdup(tmp, len);
1947 for (i = 0, k = 0; i < len; i++) {
1951 memset(e, 0, sizeof(e));
1952 silc_strncat(e, sizeof(e), tmp + k, i - k);
1953 if (!silc_string_match(tmp2->data, e)) {
1958 /* Matches. Delete it since we have it already */
1959 start = strstr(rtmp, e);
1960 if (start && strlen(start) >= (i - k)) {
1961 end = start + (i - k);
1962 n = silc_calloc(strlen(rtmp) - (i - k), sizeof(*n));
1963 strncat(n, rtmp, start - rtmp);
1964 if (strlen(end) > 1)
1965 strncat(n, end + 1, ((rtmp + strlen(rtmp)) - end) - 1);
1973 /* Save the part that we didn't already have. */
1974 if (strlen(rtmp) > 1) {
1975 silc_buffer_strformat(tmp2, rtmp, SILC_STR_END);
1976 silc_buffer_strformat(tmp2, ",", SILC_STR_END);
1981 } else if (type == 2) {
1982 /* Public key. Check first if the public key is already on the
1983 list and ignore it if it is, otherwise, add it to hash table. */
1985 /* Check if the public key is in the list already */
1986 silc_hash_table_list(list, &htl);
1987 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1988 if (type == 2 && !memcmp(tmp2->data, tmp, len)) {
1993 silc_hash_table_list_reset(&htl);
1995 /* Add new public key to invite list */
1997 tmp2 = silc_buffer_alloc_size(len);
1998 silc_buffer_put(tmp2, tmp, len);
1999 silc_hash_table_add(list, (void *)2, tmp2);
2002 } else if (type == 3) {
2005 /* Check if the ID is in the list already */
2006 silc_hash_table_list(list, &htl);
2007 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
2008 if (type == 3 && !memcmp(tmp2->data, tmp, len)) {
2013 silc_hash_table_list_reset(&htl);
2015 /* Add new Client ID to invite list */
2017 tmp2 = silc_buffer_alloc_size(len);
2018 silc_buffer_put(tmp2, tmp, len);
2019 silc_hash_table_add(list, (void *)3, tmp2);
2023 tmp = silc_argument_get_next_arg(args, &type, &len);
2027 /* Delete information to invite list */
2028 if (action == 0x01 && list) {
2029 /* Now delete the arguments from invite list */
2030 tmp = silc_argument_get_first_arg(args, &type, &len);
2033 /* Invite string. Get the old string from hash table and delete
2034 the requested string. */
2035 char *string = NULL, *start, *end, *n;
2037 if (silc_hash_table_find(list, (void *)1, NULL, (void *)&tmp2)) {
2038 string = tmp2->head;
2039 if (tmp2->truelen && !strncmp(string, tmp, tmp2->truelen - 1)) {
2040 /* Delete entire string */
2041 silc_hash_table_del(list, (void *)1);
2042 } else if (tmp2->truelen) {
2043 /* Delete part of the string */
2044 start = strstr(string, tmp);
2045 if (start && strlen(start) >= len) {
2047 n = silc_calloc(strlen(string) - len, sizeof(*n));
2048 strncat(n, string, start - string);
2049 if (strlen(end) > 1)
2050 strncat(n, end + 1, ((string + strlen(string)) - end) - 1);
2051 silc_free(tmp2->head);
2052 silc_buffer_set(tmp2, n, strlen(n));
2057 } else if (type == 2) {
2060 /* Delete from the invite list */
2061 silc_hash_table_list(list, &htl);
2062 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
2063 if (type == 2 && !memcmp(tmp2->data, tmp, len)) {
2064 silc_hash_table_del_by_context(list, (void *)2, tmp2);
2068 silc_hash_table_list_reset(&htl);
2070 } else if (type == 3) {
2073 /* Delete from the invite list */
2074 silc_hash_table_list(list, &htl);
2075 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
2076 if (type == 3 && !memcmp(tmp2->data, tmp, len)) {
2077 silc_hash_table_del_by_context(list, (void *)3, tmp2);
2081 silc_hash_table_list_reset(&htl);
2084 tmp = silc_argument_get_next_arg(args, &type, &len);
2089 /* Destructor for invite and ban list entrys */
2091 void silc_server_inviteban_destruct(void *key, void *context,
2094 silc_buffer_free(context);
2097 /* Creates connections accoring to configuration. */
2099 void silc_server_create_connections(SilcServer server)
2101 silc_schedule_task_del_by_callback(server->schedule,
2102 silc_server_connect_to_router);
2103 silc_schedule_task_add(server->schedule, 0,
2104 silc_server_connect_to_router, server, 0, 1,
2105 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
2109 silc_server_process_channel_pk_destruct(void *key, void *context,
2113 silc_pkcs_public_key_free(context);
2116 /* Processes a channel public key, either adds or removes it. */
2119 silc_server_process_channel_pk(SilcServer server,
2120 SilcChannelEntry channel,
2121 SilcUInt32 type, const unsigned char *pk,
2124 unsigned char pkhash[20];
2127 SILC_LOG_DEBUG(("Processing channel public key"));
2130 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2132 /* Decode the public key */
2133 if (!silc_pkcs_public_key_payload_decode((unsigned char *)pk, pk_len, &chpk))
2134 return SILC_STATUS_ERR_UNSUPPORTED_PUBLIC_KEY;
2136 /* Create channel public key list (hash table) if needed */
2137 if (!channel->channel_pubkeys) {
2138 channel->channel_pubkeys =
2139 silc_hash_table_alloc(0, silc_hash_data, (void *)20,
2140 silc_hash_data_compare, (void *)20,
2141 silc_server_process_channel_pk_destruct, channel,
2145 /* Create SHA-1 digest of the public key data */
2146 silc_hash_make(server->sha1hash, pk + 4, pk_len - 4, pkhash);
2149 /* Add new public key to channel public key list */
2150 SILC_LOG_DEBUG(("Add new channel public key to channel %s",
2151 channel->channel_name));
2153 /* Check for resource limit */
2154 if (silc_hash_table_count(channel->channel_pubkeys) > 64) {
2155 silc_pkcs_public_key_free(chpk);
2156 return SILC_STATUS_ERR_RESOURCE_LIMIT;
2159 /* Add if doesn't exist already */
2160 if (!silc_hash_table_find(channel->channel_pubkeys, pkhash,
2162 silc_hash_table_add(channel->channel_pubkeys, silc_memdup(pkhash, 20),
2164 } else if (type == 0x01) {
2165 /* Delete public key from channel public key list */
2166 SILC_LOG_DEBUG(("Delete a channel public key from channel %s",
2167 channel->channel_name));
2168 if (!silc_hash_table_del(channel->channel_pubkeys, pkhash))
2169 silc_pkcs_public_key_free(chpk);
2171 silc_pkcs_public_key_free(chpk);
2172 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2175 return SILC_STATUS_OK;
2178 /* Returns the channel public keys as Argument List payload. */
2180 SilcBuffer silc_server_get_channel_pk_list(SilcServer server,
2181 SilcChannelEntry channel,
2185 SilcHashTableList htl;
2186 SilcBuffer list, pkp;
2189 SILC_LOG_DEBUG(("Encoding channel public keys list"));
2191 if (!channel->channel_pubkeys ||
2192 !silc_hash_table_count(channel->channel_pubkeys))
2195 /* Encode the list */
2196 list = silc_buffer_alloc_size(2);
2197 silc_buffer_format(list,
2198 SILC_STR_UI_SHORT(silc_hash_table_count(
2199 channel->channel_pubkeys)),
2202 silc_hash_table_list(channel->channel_pubkeys, &htl);
2203 while (silc_hash_table_get(&htl, NULL, (void *)&pk)) {
2204 pkp = silc_pkcs_public_key_payload_encode(pk);
2205 list = silc_argument_payload_encode_one(list, pkp->data, pkp->len,
2207 delete ? 0x01 : 0x00);
2208 silc_buffer_free(pkp);
2210 silc_hash_table_list_reset(&htl);
2215 /* Sets the channel public keys into channel from the list of public keys. */
2217 SilcStatus silc_server_set_channel_pk_list(SilcServer server,
2218 SilcSocketConnection sender,
2219 SilcChannelEntry channel,
2220 const unsigned char *pklist,
2221 SilcUInt32 pklist_len)
2224 SilcArgumentPayload args;
2225 unsigned char *chpk;
2226 SilcUInt32 chpklen, type;
2227 SilcStatus ret = SILC_STATUS_OK;
2229 SILC_LOG_DEBUG(("Setting channel public keys list"));
2231 if (!pklist || pklist_len < 2)
2232 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2234 /* Get the argument from the Argument List Payload */
2235 SILC_GET16_MSB(argc, pklist);
2236 args = silc_argument_payload_parse(pklist + 2, pklist_len - 2, argc);
2238 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2240 /* Process the public keys one by one */
2241 chpk = silc_argument_get_first_arg(args, &type, &chpklen);
2243 /* If announcing keys and we have them set already, do not allow this */
2244 if (chpk && type == 0x03 && channel->channel_pubkeys &&
2245 server->server_type == SILC_ROUTER &&
2246 sender != SILC_PRIMARY_ROUTE(server)) {
2247 SILC_LOG_DEBUG(("Channel public key list set already, enforce our list"));
2248 silc_argument_payload_free(args);
2249 return SILC_STATUS_ERR_OPERATION_ALLOWED;
2252 /* If we are normal server and receive announcement list and we already
2253 have keys set, we replace the old list with the announced one. */
2254 if (chpk && type == 0x03 && channel->channel_pubkeys &&
2255 server->server_type != SILC_ROUTER) {
2257 unsigned char mask[4];
2259 SILC_LOG_DEBUG(("Router enforces its list, remove old list"));
2260 silc_hash_table_free(channel->channel_pubkeys);
2261 channel->channel_pubkeys = NULL;
2263 /* Send notify that removes the old list */
2264 sidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
2265 SILC_PUT32_MSB((channel->mode & (~SILC_CHANNEL_MODE_CHANNEL_AUTH)), mask);
2266 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
2267 SILC_NOTIFY_TYPE_CMODE_CHANGE, 7,
2268 sidp->data, sidp->len,
2272 strlen(channel->cipher) : 0,
2274 channel->hmac_name ?
2275 strlen(channel->hmac_name) : 0,
2276 channel->passphrase,
2277 channel->passphrase ?
2278 strlen(channel->passphrase) : 0,
2280 silc_buffer_free(sidp);
2286 ret = silc_server_process_channel_pk(server, channel, type,
2288 if (ret != SILC_STATUS_OK)
2290 chpk = silc_argument_get_next_arg(args, &type, &chpklen);
2293 silc_argument_payload_free(args);
2297 /* Verifies the Authentication Payload `auth' with one of the public keys
2298 on the `channel' public key list. */
2300 bool silc_server_verify_channel_auth(SilcServer server,
2301 SilcChannelEntry channel,
2302 SilcClientID *client_id,
2303 const unsigned char *auth,
2304 SilcUInt32 auth_len)
2308 unsigned char *pkhash;
2309 SilcUInt32 pkhash_len;
2312 SILC_LOG_DEBUG(("Verifying channel authentication"));
2314 if (!auth || !auth_len || !channel->channel_pubkeys)
2317 /* Get the hash from the auth data which tells us what public key we
2318 must use in verification. */
2320 ap = silc_auth_payload_parse(auth, auth_len);
2324 pkhash = silc_auth_get_public_data(ap, &pkhash_len);
2325 if (pkhash_len < 128)
2328 /* Find the public key with the hash */
2329 if (!silc_hash_table_find(channel->channel_pubkeys, pkhash,
2330 NULL, (void *)&chpk)) {
2331 SILC_LOG_DEBUG(("Public key not found in channel public key list"));
2335 /* Verify the signature */
2336 if (!silc_auth_verify(ap, SILC_AUTH_PUBLIC_KEY, (void *)chpk, 0,
2337 server->sha1hash, client_id, SILC_ID_CLIENT)) {
2338 SILC_LOG_DEBUG(("Authentication failed"));
2345 silc_auth_payload_free(ap);