5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2005, 2007 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 SilcBool silc_server_remove_clients_by_server(SilcServer server,
131 SilcServerEntry router,
132 SilcServerEntry entry,
133 SilcBool server_signoff)
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(silc_buffer_len(idp), sizeof(*argv[0]));
169 memcpy(argv[argc], idp->data, silc_buffer_len(idp));
170 argv_lens[argc] = silc_buffer_len(idp);
171 argv_types[argc] = argc + 1;
173 silc_buffer_free(idp);
176 if (silc_idcache_get_all(server->local_list->clients, &list)) {
177 silc_list_start(list);
178 while ((id_cache = silc_list_get(list))) {
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))) {
190 if (server_signoff) {
191 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
192 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
193 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
195 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
197 argv[argc] = silc_calloc(silc_buffer_len(idp), sizeof(*argv[0]));
198 memcpy(argv[argc], idp->data, silc_buffer_len(idp));
199 argv_lens[argc] = silc_buffer_len(idp);
200 argv_types[argc] = argc + 1;
202 silc_buffer_free(idp);
205 /* Update statistics */
206 server->stat.clients--;
207 if (server->stat.cell_clients)
208 server->stat.cell_clients--;
209 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
210 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
212 if (client->data.public_key)
213 silc_hash_table_del_by_context(server->pk_hash,
214 client->data.public_key,
216 silc_server_remove_clients_channels(server, entry, clients,
218 silc_server_del_from_watcher_list(server, client);
220 /* Remove the client entry */
221 if (!server_signoff) {
222 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
224 client->router = NULL;
225 client->connection = NULL;
227 silc_idlist_del_data(client);
228 silc_idlist_del_client(server->local_list, client);
233 if (silc_idcache_get_all(server->global_list->clients, &list)) {
234 silc_list_start(list);
235 while ((id_cache = silc_list_get(list))) {
236 client = (SilcClientEntry)id_cache->context;
238 /* If client is not registered, is not originated from `router'
239 and is not owned by `entry', skip it. */
240 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
241 client->router != router ||
242 (router != entry && !SILC_ID_COMPARE(client->id, entry->id,
243 client->id->ip.data_len))) {
247 if (server_signoff) {
248 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
249 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
250 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
252 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
254 argv[argc] = silc_calloc(silc_buffer_len(idp), sizeof(*argv[0]));
255 memcpy(argv[argc], idp->data, silc_buffer_len(idp));
256 argv_lens[argc] = silc_buffer_len(idp);
257 argv_types[argc] = argc + 1;
259 silc_buffer_free(idp);
262 /* Update statistics */
263 server->stat.clients--;
264 if (server->stat.cell_clients)
265 server->stat.cell_clients--;
266 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
267 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
269 if (client->data.public_key)
270 silc_hash_table_del_by_context(server->pk_hash,
271 client->data.public_key,
273 silc_server_remove_clients_channels(server, entry, clients,
275 silc_server_del_from_watcher_list(server, client);
277 /* Remove the client entry */
278 if (!server_signoff) {
279 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
281 client->router = NULL;
282 client->connection = NULL;
284 silc_idlist_del_data(client);
285 silc_idlist_del_client(server->global_list, client);
290 /* Return now if we are shutting down */
291 if (server->server_shutdown) {
292 silc_hash_table_free(channels);
294 if (server_signoff) {
295 for (i = 0; i < argc; i++)
298 silc_free(argv_lens);
299 silc_free(argv_types);
300 silc_hash_table_free(clients);
305 /* Send the SERVER_SIGNOFF notify */
306 if (server_signoff) {
307 SilcBuffer args, not;
309 SILC_LOG_DEBUG(("Sending SERVER_SIGNOFF for %s with %d clients",
310 silc_id_render(entry->id, SILC_ID_SERVER), argc - 1));
312 /* Send SERVER_SIGNOFF notify to our primary router */
313 if (server->router != entry) {
314 args = silc_argument_payload_encode(1, argv, argv_lens,
316 silc_server_send_notify_args(server, SILC_PRIMARY_ROUTE(server),
317 SILC_BROADCAST(server),
318 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
320 silc_buffer_free(args);
323 /* Send to local clients. We also send the list of client ID's that
324 is to be removed for those servers that would like to use that list. */
325 args = silc_argument_payload_encode(argc, argv, argv_lens,
327 not = silc_notify_payload_encode_args(SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
329 silc_server_packet_send_clients(server, clients,
330 SILC_PACKET_NOTIFY, 0, FALSE,
331 not->data, silc_buffer_len(not));
333 /* Send notify also to local backup routers */
334 silc_server_backup_send(server, NULL, SILC_PACKET_NOTIFY, 0,
335 not->data, silc_buffer_len(not), FALSE, TRUE);
337 silc_buffer_free(args);
338 silc_buffer_free(not);
339 for (i = 0; i < argc; i++)
342 silc_free(argv_lens);
343 silc_free(argv_types);
344 silc_hash_table_free(clients);
347 /* We must now re-generate the channel key for all channels that had
348 this server's client(s) on the channel. As they left the channel we
349 must re-generate the channel key. */
350 silc_hash_table_list(channels, &htl);
351 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
352 if (!silc_server_create_channel_key(server, channel, 0)) {
353 silc_hash_table_list_reset(&htl);
354 silc_hash_table_free(channels);
358 /* Do not send the channel key if private channel key mode is set */
359 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY || !channel->send_key)
362 silc_server_send_channel_key(server, NULL, channel,
363 server->server_type == SILC_ROUTER ?
364 FALSE : !server->standalone);
366 silc_hash_table_list_reset(&htl);
367 silc_hash_table_free(channels);
372 static SilcServerEntry
373 silc_server_update_clients_by_real_server(SilcServer server,
374 SilcServerEntry from,
376 SilcClientEntry client,
378 SilcIDCacheEntry client_cache)
380 SilcServerEntry server_entry;
381 SilcIDCacheEntry id_cache = NULL;
383 SilcBool tolocal = (to == server->id_entry);
385 SILC_LOG_DEBUG(("Start"));
387 if (!silc_idcache_get_all(server->local_list->servers, &list))
390 silc_list_start(list);
391 while ((id_cache = silc_list_get(list))) {
392 server_entry = (SilcServerEntry)id_cache->context;
393 if (server_entry != from &&
394 (tolocal || server_entry != server->id_entry) &&
395 SILC_ID_COMPARE(server_entry->id, client->id,
396 client->id->ip.data_len)) {
397 SILC_LOG_DEBUG(("Found (local) %s",
398 silc_id_render(server_entry->id, SILC_ID_SERVER)));
400 if (!SILC_IS_LOCAL(server_entry) && server_entry->router) {
401 SILC_LOG_DEBUG(("Server not locally connected, use its router"));
402 /* If the client is not marked as local then move it to local list
403 since the server is local. */
405 SILC_LOG_DEBUG(("Moving client to local list"));
406 silc_idcache_add(server->local_list->clients, client_cache->name,
407 client_cache->id, client_cache->context);
408 silc_idcache_del_by_context(server->global_list->clients, client,
411 server_entry = server_entry->router;
413 SILC_LOG_DEBUG(("Server locally connected"));
414 /* If the client is not marked as local then move it to local list
415 since the server is local. */
416 if (server_entry->server_type != SILC_BACKUP_ROUTER && !local) {
417 SILC_LOG_DEBUG(("Moving client to local list"));
418 silc_idcache_add(server->local_list->clients, client_cache->name,
419 client_cache->id, client_cache->context);
420 silc_idcache_del_by_context(server->global_list->clients, client,
423 } else if (server->server_type == SILC_BACKUP_ROUTER && local) {
424 /* If we are backup router and this client is on local list, we
425 must move it to global list, as it is not currently local to
426 us (we are not primary). */
427 SILC_LOG_DEBUG(("Moving client to global list"));
428 silc_idcache_add(server->global_list->clients, client_cache->name,
429 client_cache->id, client_cache->context);
430 silc_idcache_del_by_context(server->local_list->clients, client,
439 if (!silc_idcache_get_all(server->global_list->servers, &list))
442 silc_list_start(list);
443 while ((id_cache = silc_list_get(list))) {
444 server_entry = (SilcServerEntry)id_cache->context;
445 if (server_entry != from && server_entry != server->id_entry &&
446 (tolocal || server_entry != server->id_entry) &&
447 SILC_ID_COMPARE(server_entry->id, client->id,
448 client->id->ip.data_len)) {
449 SILC_LOG_DEBUG(("Found (global) %s",
450 silc_id_render(server_entry->id, SILC_ID_SERVER)));
452 if (!SILC_IS_LOCAL(server_entry) && server_entry->router) {
453 SILC_LOG_DEBUG(("Server not locally connected, use its router"));
454 /* If the client is marked as local then move it to global list
455 since the server is global. */
457 SILC_LOG_DEBUG(("Moving client to global list"));
458 silc_idcache_add(server->global_list->clients, client_cache->name,
459 client_cache->id, client_cache->context);
460 silc_idcache_del_by_context(server->local_list->clients, client,
463 server_entry = server_entry->router;
465 SILC_LOG_DEBUG(("Server locally connected"));
466 /* If the client is marked as local then move it to global list
467 since the server is global. */
468 if (server_entry->server_type != SILC_BACKUP_ROUTER && local) {
469 SILC_LOG_DEBUG(("Moving client to global list"));
470 silc_idcache_add(server->global_list->clients, client_cache->name,
471 client_cache->id, client_cache->context);
472 silc_idcache_del_by_context(server->local_list->clients, client,
483 /* Updates the clients that are originated from the `from' to be originated
484 from the `to'. If the `resolve_real_server' is TRUE then this will
485 attempt to figure out which clients really are originated from the
486 `from' and which are originated from a server that we have connection
487 to, when we've acting as backup router. If it is FALSE the `to' will
488 be the new source. */
490 void silc_server_update_clients_by_server(SilcServer server,
491 SilcServerEntry from,
493 SilcBool resolve_real_server)
496 SilcIDCacheEntry id_cache = NULL;
497 SilcClientEntry client = NULL;
500 if (from && from->id) {
501 SILC_LOG_DEBUG(("Changing from server %s",
502 silc_id_render(from->id, SILC_ID_SERVER)));
505 SILC_LOG_DEBUG(("Changing to server %s",
506 silc_id_render(to->id, SILC_ID_SERVER)));
509 SILC_LOG_DEBUG(("global list"));
511 if (silc_idcache_get_all(server->global_list->clients, &list)) {
512 silc_list_start(list);
513 while ((id_cache = silc_list_get(list))) {
514 client = (SilcClientEntry)id_cache->context;
516 /* If entry is disabled skip it. If entry is local to us, do not
517 switch it to anyone else, it is ours so skip it. */
518 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
519 SILC_IS_LOCAL(client))
522 SILC_LOG_DEBUG(("Client %s",
523 silc_id_render(client->id, SILC_ID_CLIENT)));
524 if (client->router && client->router->id)
525 SILC_LOG_DEBUG(("Client->router %s",
526 silc_id_render(client->router->id, SILC_ID_SERVER)));
529 if (client->router == from) {
530 if (resolve_real_server) {
532 silc_server_update_clients_by_real_server(server, from, to,
535 if (!client->router) {
536 if (server->server_type == SILC_ROUTER)
537 client->router = from;
546 /* All are changed */
547 if (resolve_real_server)
548 /* Call this so that the entry is moved to correct list if
549 needed. No resolving by real server is actually done. */
550 silc_server_update_clients_by_real_server(server, NULL, to,
557 if (client->router && client->router->id)
558 SILC_LOG_DEBUG(("Client changed to %s",
559 silc_id_render(client->router->id, SILC_ID_SERVER)));
563 SILC_LOG_DEBUG(("local list"));
565 if (silc_idcache_get_all(server->local_list->clients, &list)) {
566 silc_list_start(list);
567 while ((id_cache = silc_list_get(list))) {
568 client = (SilcClientEntry)id_cache->context;
570 /* If entry is disabled skip it. If entry is local to us, do not
571 switch it to anyone else, it is ours so skip it. */
572 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED) ||
573 SILC_IS_LOCAL(client))
576 SILC_LOG_DEBUG(("Client %s",
577 silc_id_render(client->id, SILC_ID_CLIENT)));
578 if (client->router && client->router->id)
579 SILC_LOG_DEBUG(("Client->router %s",
580 silc_id_render(client->router->id, SILC_ID_SERVER)));
583 if (client->router == from) {
584 if (resolve_real_server) {
586 silc_server_update_clients_by_real_server(server, from, to,
590 client->router = from;
596 /* All are changed */
597 if (resolve_real_server)
598 /* Call this so that the entry is moved to correct list if
599 needed. No resolving by real server is actually done. */
600 silc_server_update_clients_by_real_server(server, NULL, to,
607 if (client->router && client->router->id)
608 SILC_LOG_DEBUG(("Client changed to %s",
609 silc_id_render(client->router->id, SILC_ID_SERVER)));
614 /* Updates servers that are from `from' to be originated from `to'. This
615 will also update the server's connection to `to's connection. */
617 void silc_server_update_servers_by_server(SilcServer server,
618 SilcServerEntry from,
622 SilcIDCacheEntry id_cache = NULL;
623 SilcServerEntry server_entry = NULL;
625 SILC_LOG_DEBUG(("Updating servers"));
627 if (silc_idcache_get_all(server->local_list->servers, &list)) {
628 silc_list_start(list);
629 while ((id_cache = silc_list_get(list))) {
630 server_entry = (SilcServerEntry)id_cache->context;
632 /* If entry is local to us, do not switch it to any anyone else,
634 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
635 server_entry == from)
638 /* If we are standalone router, any server that is not directly
639 connected to cannot exist anymore. If we are not standalone
640 we update it correctly. */
641 if (server->server_type == SILC_ROUTER && server->standalone) {
642 silc_server_backup_del(server, server_entry);
643 silc_server_backup_replaced_del(server, server_entry);
644 silc_idlist_del_data(server_entry);
645 silc_idlist_del_server(server->local_list, server_entry);
646 server->stat.servers--;
647 server->stat.cell_servers--;
649 /* XXX if we are not standalone, do a check from local config
650 whether this server is in our cell, but not connected to
651 us (in which case we must remove it). */
654 if (server_entry->router == from) {
655 SILC_LOG_DEBUG(("Updating server (local) %s",
656 server_entry->server_name ?
657 server_entry->server_name : ""));
658 server_entry->router = to;
659 server_entry->connection = to->connection;
663 SILC_LOG_DEBUG(("Updating server (local) %s",
664 server_entry->server_name ?
665 server_entry->server_name : ""));
666 server_entry->router = to;
667 server_entry->connection = to->connection;
673 if (silc_idcache_get_all(server->global_list->servers, &list)) {
674 silc_list_start(list);
675 while ((id_cache = silc_list_get(list))) {
676 server_entry = (SilcServerEntry)id_cache->context;
678 /* If entry is local to us, do not switch it to anyone else,
680 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
681 server_entry == from)
684 /* If we are standalone router, any server that is not directly
685 connected to cannot exist anymore. If we are not standalone
686 we update it correctly. */
687 if (server->server_type == SILC_ROUTER && server->standalone) {
688 silc_server_backup_del(server, server_entry);
689 silc_server_backup_replaced_del(server, server_entry);
690 silc_idlist_del_data(server_entry);
691 silc_idlist_del_server(server->global_list, server_entry);
692 server->stat.servers--;
693 server->stat.cell_servers--;
695 /* XXX if we are not standalone, do a check from local config
696 whether this server is in our cell, but not connected to
697 us (in which case we must remove it). */
700 if (server_entry->router == from) {
701 SILC_LOG_DEBUG(("Updating server (global) %s",
702 server_entry->server_name ?
703 server_entry->server_name : ""));
704 server_entry->router = to;
705 server_entry->connection = to->connection;
709 SILC_LOG_DEBUG(("Updating server (global) %s",
710 server_entry->server_name ?
711 server_entry->server_name : ""));
712 server_entry->router = to;
713 server_entry->connection = to->connection;
721 /* Toggles the enabled/disabled status of local server connections. Packets
722 can be sent to the servers when `toggle_enabled' is TRUE and will be
723 dropped if `toggle_enabled' is FALSE, after this function is called. */
725 void silc_server_local_servers_toggle_enabled(SilcServer server,
726 SilcBool toggle_enabled)
729 SilcIDCacheEntry id_cache = NULL;
730 SilcServerEntry server_entry = NULL;
732 if (silc_idcache_get_all(server->local_list->servers, &list)) {
733 silc_list_start(list);
734 while ((id_cache = silc_list_get(list))) {
735 server_entry = (SilcServerEntry)id_cache->context;
736 if (!SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry)
740 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
742 server_entry->data.status |= SILC_IDLIST_STATUS_DISABLED;
747 if (silc_idcache_get_all(server->global_list->servers, &list)) {
748 silc_list_start(list);
749 while ((id_cache = silc_list_get(list))) {
750 server_entry = (SilcServerEntry)id_cache->context;
751 if (!SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry)
755 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
757 server_entry->data.status |= SILC_IDLIST_STATUS_DISABLED;
763 /* Removes servers that are originated from the `from'. The server
764 entry is deleted in this function. If `remove_clients' is TRUE then
765 all clients originated from the server are removed too, and server
766 signoff is sent. Note that this does not remove the `from'. This
767 also does not remove locally connected servers. */
769 void silc_server_remove_servers_by_server(SilcServer server,
770 SilcServerEntry from,
771 SilcBool remove_clients)
774 SilcIDCacheEntry id_cache = NULL;
775 SilcServerEntry server_entry = NULL;
777 SILC_LOG_DEBUG(("Removing servers by %s",
778 from->server_name ? from->server_name : "server"));
780 if (silc_idcache_get_all(server->local_list->servers, &list)) {
781 silc_list_start(list);
782 while ((id_cache = silc_list_get(list))) {
783 server_entry = (SilcServerEntry)id_cache->context;
784 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
785 server_entry->router != from || server_entry == from)
788 /* Remove clients owned by this server */
790 silc_server_remove_clients_by_server(server, from, server_entry,
793 /* Remove the server */
794 silc_server_backup_del(server, server_entry);
795 silc_idlist_del_server(server->local_list, server_entry);
799 if (silc_idcache_get_all(server->global_list->servers, &list)) {
800 silc_list_start(list);
801 while ((id_cache = silc_list_get(list))) {
802 server_entry = (SilcServerEntry)id_cache->context;
803 if (SILC_IS_LOCAL(server_entry) || server_entry == server->id_entry ||
804 server_entry->router != from || server_entry == from)
807 /* Remove clients owned by this server */
809 silc_server_remove_clients_by_server(server, from, server_entry,
812 /* Remove the server */
813 silc_server_backup_del(server, server_entry);
814 silc_idlist_del_server(server->global_list, server_entry);
819 /* Removes channels that are from `from. */
821 void silc_server_remove_channels_by_server(SilcServer server,
822 SilcServerEntry from)
825 SilcIDCacheEntry id_cache = NULL;
826 SilcChannelEntry channel = NULL;
828 SILC_LOG_DEBUG(("Removing channels by server"));
830 if (silc_idcache_get_all(server->global_list->channels, &list)) {
831 silc_list_start(list);
832 while ((id_cache = silc_list_get(list))) {
833 channel = (SilcChannelEntry)id_cache->context;
834 if (channel->router == from)
835 silc_idlist_del_channel(server->global_list, channel);
840 /* Updates channels that are from `from' to be originated from `to'. */
842 void silc_server_update_channels_by_server(SilcServer server,
843 SilcServerEntry from,
847 SilcIDCacheEntry id_cache = NULL;
848 SilcChannelEntry channel = NULL;
850 SILC_LOG_DEBUG(("Updating channels by server"));
852 if (silc_idcache_get_all(server->global_list->channels, &list)) {
853 silc_list_start(list);
854 while ((id_cache = silc_list_get(list))) {
855 channel = (SilcChannelEntry)id_cache->context;
857 if (channel->router == from)
858 channel->router = to;
861 channel->router = to;
867 /* Checks whether given channel has global users. If it does this returns
868 TRUE and FALSE if there is only locally connected clients on the channel. */
870 SilcBool silc_server_channel_has_global(SilcChannelEntry channel)
872 SilcChannelClientEntry chl;
873 SilcHashTableList htl;
875 silc_hash_table_list(channel->user_list, &htl);
876 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
877 if (chl->client->router) {
878 silc_hash_table_list_reset(&htl);
882 silc_hash_table_list_reset(&htl);
887 /* Checks whether given channel has locally connected users. If it does this
888 returns TRUE and FALSE if there is not one locally connected client. */
890 SilcBool silc_server_channel_has_local(SilcChannelEntry channel)
892 SilcChannelClientEntry chl;
893 SilcHashTableList htl;
895 silc_hash_table_list(channel->user_list, &htl);
896 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
897 if (SILC_IS_LOCAL(chl->client)) {
898 silc_hash_table_list_reset(&htl);
902 silc_hash_table_list_reset(&htl);
907 /* This function removes the channel and all users on the channel, unless
908 the channel is permanent. In this case the channel is disabled but all
909 users are removed from the channel. Returns TRUE if the channel is
910 destroyed totally, and FALSE if it is permanent and remains. */
912 SilcBool silc_server_channel_delete(SilcServer server,
913 SilcChannelEntry channel)
915 SilcChannelClientEntry chl;
916 SilcHashTableList htl;
917 SilcBool delchan = !(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH);
919 SILC_LOG_DEBUG(("Deleting channel %s", channel->channel_name));
922 /* Update statistics */
923 if (server->server_type == SILC_ROUTER)
924 server->stat.chanclients -= channel->user_count;
926 /* Totally delete the channel and all users on the channel. The
927 users are deleted automatically in silc_idlist_del_channel. */
928 channel->disabled = TRUE;
929 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
930 if (silc_idlist_del_channel(server->local_list, channel)) {
931 server->stat.my_channels--;
932 if (server->server_type == SILC_ROUTER) {
933 server->stat.channels--;
934 server->stat.cell_channels--;
937 if (silc_idlist_del_channel(server->global_list, channel))
938 if (server->server_type == SILC_ROUTER)
939 server->stat.channels--;
945 /* Channel is permanent, do not remove it, remove only users */
946 channel->disabled = TRUE;
947 silc_hash_table_list(channel->user_list, &htl);
948 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
949 silc_hash_table_del(chl->client->channels, channel);
950 silc_hash_table_del(channel->user_list, chl->client);
951 channel->user_count--;
953 /* Update statistics */
954 if (SILC_IS_LOCAL(chl->client))
955 server->stat.my_chanclients--;
956 if (server->server_type == SILC_ROUTER) {
957 server->stat.cell_chanclients--;
958 server->stat.chanclients--;
963 silc_hash_table_list_reset(&htl);
965 SILC_LOG_DEBUG(("Channel %s remains (permanent)", channel->channel_name));
970 /* Returns TRUE if the given client is on the channel. FALSE if not.
971 This works because we assure that the user list on the channel is
972 always in up to date thus we can only check the channel list from
973 `client' which is faster than checking the user list from `channel'. */
975 SilcBool silc_server_client_on_channel(SilcClientEntry client,
976 SilcChannelEntry channel,
977 SilcChannelClientEntry *chl)
979 if (!client || !channel)
982 return silc_hash_table_find(client->channels, channel, NULL,
986 /* Find number of sockets by IP address indicated by `ip'. Returns 0 if
987 socket connections with the IP address does not exist. Counts only
988 fully established connections. */
990 SilcUInt32 silc_server_num_sockets_by_ip(SilcServer server, const char *ip,
991 SilcConnectionType type)
993 SilcServerConnection conn;
994 SilcIDListData idata;
998 silc_dlist_start(server->conns);
999 while ((conn = silc_dlist_get(server->conns))) {
1002 silc_socket_stream_get_info(silc_packet_stream_get_stream(conn->sock),
1003 NULL, NULL, &ipaddr, NULL);
1004 idata = silc_packet_get_context(conn->sock);
1005 if (!strcmp(ipaddr, ip) && idata && idata->conn_type == type)
1012 /* Find active socket connection by the IP address and port indicated by
1013 `ip' and `port', and socket connection type of `type'. */
1016 silc_server_find_socket_by_host(SilcServer server,
1017 SilcConnectionType type,
1018 const char *ip, SilcUInt16 port)
1020 SilcServerConnection conn;
1021 SilcIDListData idata;
1024 silc_dlist_start(server->conns);
1025 while ((conn = silc_dlist_get(server->conns))) {
1028 idata = silc_packet_get_context(conn->sock);
1029 silc_socket_stream_get_info(silc_packet_stream_get_stream(conn->sock),
1030 NULL, NULL, &ipaddr, NULL);
1031 if (!strcmp(ipaddr, ip) &&
1032 (!port || conn->remote_port == port) &&
1033 idata->conn_type == type)
1040 /* Find number of sockets by IP address indicated by remote host, indicatd
1041 by `ip' or `hostname', `port', and `type'. Returns 0 if socket connections
1042 does not exist. If `ip' is provided then `hostname' is ignored. */
1044 SilcUInt32 silc_server_num_sockets_by_remote(SilcServer server,
1046 const char *hostname,
1049 SilcServerConnection conn;
1052 if (!ip && !hostname)
1055 silc_dlist_start(server->conns);
1056 while ((conn = silc_dlist_get(server->conns))) {
1057 if (((ip && !strcmp(conn->remote_host, ip)) ||
1058 (hostname && !strcmp(conn->remote_host, hostname))) &&
1059 conn->remote_port == port)
1066 /* SKR find callbcak */
1068 static void find_callback(SilcSKR skr, SilcSKRFind find,
1069 SilcSKRStatus status, SilcDList keys,
1072 SilcPublicKey *public_key = context;
1076 silc_dlist_start(keys);
1077 key = silc_dlist_get(keys);
1078 *public_key = key->key;
1079 silc_dlist_uninit(keys);
1082 silc_skr_find_free(find);
1085 /* Get public key. For public key tables that has multiple keys in it the
1086 silc_server_find_public_key must be used. */
1088 SilcPublicKey silc_server_get_public_key(SilcServer server,
1089 SilcSKRKeyUsage usage,
1093 SilcPublicKey public_key = NULL;
1095 SILC_LOG_DEBUG(("Start"));
1097 find = silc_skr_find_alloc();
1101 silc_skr_find_set_usage(find, usage);
1102 silc_skr_find_set_context(find, key_context);
1103 silc_skr_find(server->repository, server->schedule,
1104 find, find_callback, &public_key);
1109 /* Find public key by client for identification purposes. Finds keys
1110 with SILC_SKR_USAGE_IDENTIFICATION. */
1112 SilcBool silc_server_get_public_key_by_client(SilcServer server,
1113 SilcClientEntry client,
1114 SilcPublicKey *public_key)
1116 SilcPublicKey pubkey = NULL;
1117 SilcBool ret = FALSE;
1119 pubkey = silc_server_get_public_key(server, SILC_SKR_USAGE_IDENTIFICATION,
1125 *public_key = pubkey;
1130 /* Check whether the connection `sock' is allowed to connect to us. This
1131 checks for example whether there is too much connections for this host,
1132 and required version for the host etc. */
1134 SilcBool silc_server_connection_allowed(SilcServer server,
1135 SilcPacketStream sock,
1136 SilcConnectionType type,
1137 SilcServerConfigConnParams *global,
1138 SilcServerConfigConnParams *params,
1141 SilcUInt32 conn_number = (type == SILC_CONN_CLIENT ?
1142 server->stat.my_clients :
1143 type == SILC_CONN_SERVER ?
1144 server->stat.my_servers :
1145 server->stat.my_routers);
1146 SilcUInt32 num_sockets, max_hosts, max_per_host;
1147 SilcUInt32 r_protocol_version, l_protocol_version;
1148 SilcUInt32 r_software_version, l_software_version;
1149 char *r_vendor_version = NULL, *l_vendor_version;
1150 const char *hostname, *ip;
1152 silc_socket_stream_get_info(silc_packet_stream_get_stream(sock),
1153 NULL, &hostname, &ip, NULL);
1155 SILC_LOG_DEBUG(("Checking whether connection is allowed"));
1159 l_protocol_version =
1160 silc_version_to_num(params && params->version_protocol ?
1161 params->version_protocol :
1162 global->version_protocol);
1163 l_software_version =
1164 silc_version_to_num(params && params->version_software ?
1165 params->version_software :
1166 global->version_software);
1167 l_vendor_version = (params && params->version_software_vendor ?
1168 params->version_software_vendor :
1169 global->version_software_vendor);
1171 if (ske && silc_ske_parse_version(ske, &r_protocol_version, NULL,
1172 &r_software_version, NULL,
1173 &r_vendor_version)) {
1174 /* Match protocol version */
1175 if (l_protocol_version && r_protocol_version &&
1176 r_protocol_version < l_protocol_version) {
1177 SILC_LOG_INFO(("Connection %s (%s) is too old version",
1179 silc_server_disconnect_remote(server, sock,
1180 SILC_STATUS_ERR_BAD_VERSION,
1181 "You support too old protocol version");
1185 /* Math software version */
1186 if (l_software_version && r_software_version &&
1187 r_software_version < l_software_version) {
1188 SILC_LOG_INFO(("Connection %s (%s) is too old version",
1190 silc_server_disconnect_remote(server, sock,
1191 SILC_STATUS_ERR_BAD_VERSION,
1192 "You support too old software version");
1196 /* Regex match vendor version */
1197 if (l_vendor_version && r_vendor_version &&
1198 !silc_string_match(l_vendor_version, r_vendor_version)) {
1199 SILC_LOG_INFO(("Connection %s (%s) is unsupported version",
1201 silc_server_disconnect_remote(server, sock,
1202 SILC_STATUS_ERR_BAD_VERSION,
1203 "Your software is not supported");
1207 silc_free(r_vendor_version);
1209 /* Check for maximum connections limit */
1211 num_sockets = silc_server_num_sockets_by_ip(server, ip, type);
1212 max_hosts = (params ? params->connections_max : global->connections_max);
1213 max_per_host = (params ? params->connections_max_per_host :
1214 global->connections_max_per_host);
1216 if (max_hosts && conn_number >= max_hosts) {
1217 SILC_LOG_INFO(("Server is full, closing %s (%s) connection",
1219 silc_server_disconnect_remote(server, sock,
1220 SILC_STATUS_ERR_RESOURCE_LIMIT,
1221 "Server is full, try again later");
1225 if (num_sockets >= max_per_host) {
1226 SILC_LOG_INFO(("Too many connections from %s (%s), closing connection",
1228 silc_server_disconnect_remote(server, sock,
1229 SILC_STATUS_ERR_RESOURCE_LIMIT,
1230 "Too many connections from your host");
1237 /* Checks that client has rights to add or remove channel modes. If any
1238 of the checks fails FALSE is returned. */
1240 SilcBool silc_server_check_cmode_rights(SilcServer server,
1241 SilcChannelEntry channel,
1242 SilcChannelClientEntry client,
1245 SilcBool is_op = client->mode & SILC_CHANNEL_UMODE_CHANOP;
1246 SilcBool is_fo = client->mode & SILC_CHANNEL_UMODE_CHANFO;
1248 /* Check whether has rights to change anything */
1249 if (!is_op && !is_fo)
1252 /* Check whether has rights to change everything */
1256 /* Founder implies operator */
1260 /* We know that client is channel operator, check that they are not
1261 changing anything that requires channel founder rights. Rest of the
1262 modes are available automatically for channel operator. */
1264 if (mode & SILC_CHANNEL_MODE_PRIVKEY) {
1265 if (is_op && !is_fo)
1268 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
1269 if (is_op && !is_fo)
1274 if (mode & SILC_CHANNEL_MODE_PASSPHRASE) {
1275 if (!(channel->mode & SILC_CHANNEL_MODE_PASSPHRASE)) {
1276 if (is_op && !is_fo)
1280 if (channel->mode & SILC_CHANNEL_MODE_PASSPHRASE) {
1281 if (is_op && !is_fo)
1286 if (mode & SILC_CHANNEL_MODE_CIPHER) {
1287 if (!(channel->mode & SILC_CHANNEL_MODE_CIPHER)) {
1288 if (is_op && !is_fo)
1292 if (channel->mode & SILC_CHANNEL_MODE_CIPHER) {
1293 if (is_op && !is_fo)
1298 if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
1299 if (!(channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH)) {
1300 if (is_op && !is_fo)
1304 if (channel->mode & SILC_CHANNEL_MODE_FOUNDER_AUTH) {
1305 if (is_op && !is_fo)
1310 if (mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
1311 if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS)) {
1312 if (is_op && !is_fo)
1316 if (channel->mode & SILC_CHANNEL_MODE_SILENCE_USERS) {
1317 if (is_op && !is_fo)
1322 if (mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
1323 if (!(channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS)) {
1324 if (is_op && !is_fo)
1328 if (channel->mode & SILC_CHANNEL_MODE_SILENCE_OPERS) {
1329 if (is_op && !is_fo)
1334 if (mode & SILC_CHANNEL_MODE_CHANNEL_AUTH) {
1335 if (!(channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH)) {
1336 if (is_op && !is_fo)
1340 if (channel->mode & SILC_CHANNEL_MODE_CHANNEL_AUTH) {
1341 if (is_op && !is_fo)
1349 /* Check that the client has rights to change its user mode. Returns
1350 FALSE if setting some mode is not allowed. */
1352 SilcBool silc_server_check_umode_rights(SilcServer server,
1353 SilcClientEntry client,
1356 SilcBool server_op = FALSE, router_op = FALSE;
1358 if (mode & SILC_UMODE_SERVER_OPERATOR) {
1359 /* Cannot set server operator mode (must use OPER command) */
1360 if (!(client->mode & SILC_UMODE_SERVER_OPERATOR))
1363 /* Remove the server operator rights */
1364 if (client->mode & SILC_UMODE_SERVER_OPERATOR)
1368 if (mode & SILC_UMODE_ROUTER_OPERATOR) {
1369 /* Cannot set router operator mode (must use SILCOPER command) */
1370 if (!(client->mode & SILC_UMODE_ROUTER_OPERATOR))
1373 /* Remove the router operator rights */
1374 if (client->mode & SILC_UMODE_ROUTER_OPERATOR)
1379 SILC_UMODE_STATS_UPDATE(server, SILC_UMODE_SERVER_OPERATOR);
1381 SILC_UMODE_STATS_UPDATE(router, SILC_UMODE_ROUTER_OPERATOR);
1386 /* This function is used to send the notify packets and motd to the
1387 incoming client connection. */
1389 void silc_server_send_connect_notifys(SilcServer server,
1390 SilcPacketStream sock,
1391 SilcClientEntry client)
1395 SILC_LOG_DEBUG(("Send welcome notifys"));
1397 /* Send some nice info to the client */
1398 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1399 ("Welcome to the SILC Network %s",
1401 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1402 ("Your host is %s, running version %s",
1403 server->server_name, server_version));
1405 if (server->server_type == SILC_ROUTER) {
1406 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1407 ("There are %d clients, %d servers and %d "
1408 "routers in SILC Network",
1409 server->stat.clients, server->stat.servers,
1410 server->stat.routers));
1412 if (server->stat.clients && server->stat.servers + 1)
1413 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1414 ("There are %d clients, %d servers and %d "
1415 "routers in SILC Network",
1416 server->stat.clients, server->stat.servers,
1417 (server->standalone ? 0 :
1418 !server->stat.routers ? 1 :
1419 server->stat.routers)));
1422 if (server->stat.cell_clients && server->stat.cell_servers + 1)
1423 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1424 ("There are %d clients on %d servers in our cell",
1425 server->stat.cell_clients,
1426 server->stat.cell_servers));
1427 if (server->server_type == SILC_ROUTER) {
1428 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1429 ("I have %d clients, %d channels, %d servers and "
1431 server->stat.my_clients,
1432 server->stat.my_channels,
1433 server->stat.my_servers,
1434 server->stat.my_routers));
1436 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1437 ("I have %d clients and %d channels formed",
1438 server->stat.my_clients,
1439 server->stat.my_channels));
1442 if (server->stat.server_ops || server->stat.router_ops)
1443 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1444 ("There are %d server operators and %d router "
1446 server->stat.server_ops,
1447 server->stat.router_ops));
1448 if (server->stat.my_router_ops + server->stat.my_server_ops)
1449 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1450 ("I have %d operators online",
1451 server->stat.my_router_ops +
1452 server->stat.my_server_ops));
1454 silc_packet_get_keys(sock, &key, NULL, NULL, NULL);
1455 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1456 ("Your connection is secured with %s cipher, "
1457 "key length %d bits",
1458 silc_cipher_get_name(key),
1459 silc_cipher_get_key_len(key)));
1460 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1461 ("Your current nickname is %s",
1465 silc_server_send_motd(server, sock);
1468 /* Kill the client indicated by `remote_client' sending KILLED notify
1469 to the client, to all channels client has joined and to primary
1470 router if needed. The killed client is also removed from all channels. */
1472 void silc_server_kill_client(SilcServer server,
1473 SilcClientEntry remote_client,
1474 const char *comment,
1476 SilcIdType killer_id_type)
1478 SilcBuffer killed, killer;
1480 SILC_LOG_DEBUG(("Killing client %s",
1481 silc_id_render(remote_client->id, SILC_ID_CLIENT)));
1483 /* Send the KILL notify packets. First send it to the channel, then
1484 to our primary router and then directly to the client who is being
1485 killed right now. */
1487 killed = silc_id_payload_encode(remote_client->id, SILC_ID_CLIENT);
1488 killer = silc_id_payload_encode(killer_id, killer_id_type);
1490 /* Send KILLED notify to the channels. It is not sent to the client
1491 as it will be sent differently destined directly to the client and not
1493 silc_server_send_notify_on_channels(server, remote_client,
1494 remote_client, SILC_NOTIFY_TYPE_KILLED,
1495 3, killed->data, silc_buffer_len(killed),
1496 comment, comment ? strlen(comment) : 0,
1497 killer->data, silc_buffer_len(killer));
1499 /* Send KILLED notify to primary route */
1500 silc_server_send_notify_killed(server, SILC_PRIMARY_ROUTE(server),
1501 SILC_BROADCAST(server), remote_client->id,
1502 comment, killer_id, killer_id_type);
1504 /* Send KILLED notify to the client directly */
1505 if (remote_client->connection || remote_client->router)
1506 silc_server_send_notify_killed(server, remote_client->connection ?
1507 remote_client->connection :
1508 remote_client->router->connection, FALSE,
1509 remote_client->id, comment,
1510 killer_id, killer_id_type);
1512 /* Remove the client from all channels. This generates new keys to the
1513 channels as well. */
1514 silc_server_remove_from_channels(server, NULL, remote_client, FALSE,
1517 /* Remove the client entry, If it is locally connected then we will also
1518 disconnect the client here */
1519 if (remote_client->connection) {
1520 /* Remove locally conneted client */
1521 SilcPacketStream sock = remote_client->connection;
1522 silc_server_free_client_data(server, sock, remote_client, FALSE, NULL);
1523 silc_server_close_connection(server, sock);
1525 /* Update statistics */
1526 server->stat.clients--;
1527 if (server->stat.cell_clients)
1528 server->stat.cell_clients--;
1529 SILC_OPER_STATS_UPDATE(remote_client, server, SILC_UMODE_SERVER_OPERATOR);
1530 SILC_OPER_STATS_UPDATE(remote_client, router, SILC_UMODE_ROUTER_OPERATOR);
1532 if (remote_client->data.public_key)
1533 silc_hash_table_del_by_context(server->pk_hash,
1534 remote_client->data.public_key,
1537 if (SILC_IS_LOCAL(remote_client)) {
1538 server->stat.my_clients--;
1539 silc_schedule_task_del_by_context(server->schedule, remote_client);
1542 /* Remove remote client */
1543 silc_idlist_del_data(remote_client);
1544 if (!silc_idlist_del_client(server->global_list, remote_client)) {
1545 /* Remove this client from watcher list if it is */
1546 silc_server_del_from_watcher_list(server, remote_client);
1547 silc_idlist_del_client(server->local_list, remote_client);
1551 silc_buffer_free(killer);
1552 silc_buffer_free(killed);
1557 SilcClientEntry client;
1558 SilcNotifyType notify;
1559 const char *new_nick;
1560 } WatcherNotifyContext;
1563 silc_server_check_watcher_list_foreach(void *key, void *context,
1566 WatcherNotifyContext *notify = user_context;
1567 SilcClientEntry entry = context;
1568 SilcPacketStream sock;
1573 if (entry == notify->client)
1576 sock = silc_server_get_client_route(notify->server, NULL, 0, entry->id,
1579 SILC_LOG_DEBUG(("Sending WATCH notify to %s",
1580 silc_id_render(entry->id, SILC_ID_CLIENT)));
1582 /* Send the WATCH notify */
1583 silc_server_send_notify_watch(notify->server, sock, entry,
1585 notify->new_nick ? notify->new_nick :
1586 (const char *)notify->client->nickname,
1588 notify->client->data.public_key);
1592 /* This function checks whether the `client' nickname and/or 'client'
1593 public key is being watched by someone, and notifies the watcher of the
1594 notify change of notify type indicated by `notify'. */
1596 SilcBool silc_server_check_watcher_list(SilcServer server,
1597 SilcClientEntry client,
1598 const char *new_nick,
1599 SilcNotifyType notify)
1601 unsigned char hash[16];
1602 WatcherNotifyContext n;
1604 SILC_LOG_DEBUG(("Checking watcher list %s",
1605 client->nickname ? client->nickname : (unsigned char *)""));
1607 /* If the watching is rejected by the client do nothing */
1608 if (client->mode & SILC_UMODE_REJECT_WATCHING)
1611 /* Make hash from the nick, or take it from Client ID */
1612 if (client->nickname) {
1613 unsigned char *nickc;
1614 nickc = silc_identifier_check(client->nickname, strlen(client->nickname),
1615 SILC_STRING_UTF8, 128, NULL);
1618 silc_hash_make(server->md5hash, nickc, strlen(nickc), hash);
1621 memset(hash, 0, sizeof(hash));
1622 memcpy(hash, client->id->hash, sizeof(client->id->hash));
1627 n.new_nick = new_nick;
1630 /* Send notify to all watchers watching this nickname */
1631 silc_hash_table_find_foreach(server->watcher_list, hash,
1632 silc_server_check_watcher_list_foreach, &n);
1634 /* Send notify to all watchers watching this public key */
1635 if (client->data.public_key)
1636 silc_hash_table_find_foreach(server->watcher_list_pk,
1637 client->data.public_key,
1638 silc_server_check_watcher_list_foreach,
1644 /* Remove the `client' from watcher list. After calling this the `client'
1645 is not watching any nicknames. */
1647 SilcBool silc_server_del_from_watcher_list(SilcServer server,
1648 SilcClientEntry client)
1650 SilcHashTableList htl;
1652 SilcClientEntry entry;
1653 SilcBool found = FALSE;
1655 silc_hash_table_list(server->watcher_list, &htl);
1656 while (silc_hash_table_get(&htl, &key, (void *)&entry)) {
1657 if (entry == client) {
1658 silc_hash_table_del_by_context(server->watcher_list, key, client);
1661 SILC_LOG_DEBUG(("Removing %s from WATCH list",
1662 silc_id_render(client->id, SILC_ID_CLIENT)));
1664 /* Now check whether there still exists entries with this key, if not
1665 then free the key to not leak memory. */
1666 if (!silc_hash_table_find(server->watcher_list, key, NULL, NULL))
1672 silc_hash_table_list_reset(&htl);
1674 silc_hash_table_list(server->watcher_list_pk, &htl);
1675 while (silc_hash_table_get(&htl, &key, (void *)&entry)) {
1676 if (entry == client) {
1677 silc_hash_table_del_by_context(server->watcher_list_pk, key, client);
1680 SILC_LOG_DEBUG(("Removing %s from WATCH list",
1681 silc_id_render(client->id, SILC_ID_CLIENT)));
1683 /* Now check whether there still exists entries with this key, if not
1684 then free the key to not leak memory. */
1685 if (!silc_hash_table_find(server->watcher_list_pk, key, NULL, NULL))
1686 silc_pkcs_public_key_free(key);
1691 silc_hash_table_list_reset(&htl);
1696 /* Force the client indicated by `chl' to change the channel user mode
1697 on channel indicated by `channel' to `forced_mode'. */
1699 SilcBool silc_server_force_cumode_change(SilcServer server,
1700 SilcPacketStream sock,
1701 SilcChannelEntry channel,
1702 SilcChannelClientEntry chl,
1703 SilcUInt32 forced_mode)
1705 SilcBuffer idp1, idp2;
1706 unsigned char cumode[4];
1708 SILC_LOG_DEBUG(("Enforcing sender to change mode"));
1711 silc_server_send_notify_cumode(server, sock, FALSE, channel, forced_mode,
1712 server->id, SILC_ID_SERVER,
1713 chl->client->id, NULL);
1715 idp1 = silc_id_payload_encode(server->id, SILC_ID_SERVER);
1716 idp2 = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
1717 SILC_PUT32_MSB(forced_mode, cumode);
1718 silc_server_send_notify_to_channel(server, sock, channel, FALSE, TRUE,
1719 SILC_NOTIFY_TYPE_CUMODE_CHANGE,
1720 3, idp1->data, silc_buffer_len(idp1),
1721 cumode, sizeof(cumode),
1722 idp2->data, silc_buffer_len(idp2));
1723 silc_buffer_free(idp1);
1724 silc_buffer_free(idp2);
1729 /* This function can be used to match the invite and ban lists. */
1731 SilcBool silc_server_inviteban_match(SilcServer server, SilcHashTable list,
1732 SilcUInt8 type, void *check)
1734 unsigned char *tmp = NULL;
1735 SilcUInt32 len = 0, t;
1736 SilcHashTableList htl;
1737 SilcBuffer entry, idp = NULL, pkp = NULL;
1738 SilcBool ret = FALSE;
1740 SILC_LOG_DEBUG(("Matching invite/ban"));
1742 if (type < 1 || type > 3 || !check)
1746 tmp = strdup((char *)check);
1751 pkp = silc_public_key_payload_encode(check);
1755 len = silc_buffer_len(pkp);
1758 idp = silc_id_payload_encode(check, SILC_ID_CLIENT);
1762 len = silc_buffer_len(idp);
1765 /* Compare the list */
1766 silc_hash_table_list(list, &htl);
1767 while (silc_hash_table_get(&htl, (void *)&t, (void *)&entry)) {
1770 if (silc_string_match(entry->data, tmp)) {
1774 } else if (!memcmp(entry->data, tmp, len)) {
1780 silc_hash_table_list_reset(&htl);
1784 silc_buffer_free(idp);
1785 silc_buffer_free(pkp);
1789 /* Process invite or ban information */
1791 SilcBool silc_server_inviteban_process(SilcServer server, SilcHashTable list,
1792 SilcUInt8 action, SilcArgumentPayload args)
1795 SilcUInt32 type, len;
1797 SilcHashTableList htl;
1799 SILC_LOG_DEBUG(("Processing invite/ban for %s action",
1800 action == 0x01 ? "DEL" : "ADD"));
1802 /* Add the information to invite list */
1803 if (action == 0x00 || action == 0x03) {
1804 /* Traverse all arguments and add to the hash table according to
1806 tmp = silc_argument_get_first_arg(args, &type, &len);
1809 /* Check validity of the string. Actually we should parse the
1810 whole string and verify all components individually. */
1811 if (!silc_utf8_valid(tmp, len) || !len) {
1812 tmp = silc_argument_get_next_arg(args, &type, &len);
1815 if (strchr(tmp, ',')) {
1816 tmp = silc_argument_get_next_arg(args, &type, &len);
1820 /* Check if the string is added already */
1821 silc_hash_table_list(list, &htl);
1822 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1823 if (type == 1 && silc_string_match(tmp2->data, tmp)) {
1828 silc_hash_table_list_reset(&htl);
1831 /* Add the string to hash table */
1832 tmp2 = silc_buffer_alloc_size(len + 1);
1833 if (tmp[len - 1] == ',')
1834 tmp[len - 1] = '\0';
1835 silc_buffer_put(tmp2, tmp, len);
1836 silc_hash_table_add(list, (void *)1, tmp2);
1839 } else if (type == 2) {
1840 /* Public key. Check first if the public key is already on the
1841 list and ignore it if it is, otherwise, add it to hash table. */
1844 /* Verify validity of the public key */
1845 if (!silc_public_key_payload_decode(tmp, len, &pk)) {
1846 tmp = silc_argument_get_next_arg(args, &type, &len);
1849 silc_pkcs_public_key_free(pk);
1851 /* Check if the public key is in the list already */
1852 silc_hash_table_list(list, &htl);
1853 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1854 if (type == 2 && !memcmp(tmp2->data, tmp, len)) {
1859 silc_hash_table_list_reset(&htl);
1861 /* Add new public key to invite list */
1863 tmp2 = silc_buffer_alloc_size(len);
1864 silc_buffer_put(tmp2, tmp, len);
1865 silc_hash_table_add(list, (void *)2, tmp2);
1868 } else if (type == 3) {
1871 /* Check if the ID is in the list already */
1872 silc_hash_table_list(list, &htl);
1873 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1874 if (type == 3 && !memcmp(tmp2->data, tmp, len)) {
1879 silc_hash_table_list_reset(&htl);
1881 /* Add new Client ID to invite list */
1883 tmp2 = silc_buffer_alloc_size(len);
1884 silc_buffer_put(tmp2, tmp, len);
1885 silc_hash_table_add(list, (void *)3, tmp2);
1889 tmp = silc_argument_get_next_arg(args, &type, &len);
1893 /* Delete information to invite list */
1894 if (action == 0x01 && list) {
1895 /* Now delete the arguments from invite list */
1896 tmp = silc_argument_get_first_arg(args, &type, &len);
1899 /* Check validity of the string. Actually we should parse the
1900 whole string and verify all components individually. */
1901 if (!silc_utf8_valid(tmp, len)) {
1902 tmp = silc_argument_get_next_arg(args, &type, &len);
1905 if (strchr(tmp, ',')) {
1906 tmp = silc_argument_get_next_arg(args, &type, &len);
1910 /* Delete from the list */
1911 silc_hash_table_list(list, &htl);
1912 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1913 if (type == 1 && silc_string_match(tmp2->data, tmp)) {
1914 silc_hash_table_del_by_context(list, (void *)1, tmp2);
1918 silc_hash_table_list_reset(&htl);
1920 } else if (type == 2) {
1924 /* Verify validity of the public key */
1925 if (!silc_public_key_payload_decode(tmp, len, &pk)) {
1926 tmp = silc_argument_get_next_arg(args, &type, &len);
1929 silc_pkcs_public_key_free(pk);
1931 /* Delete from the invite list */
1932 silc_hash_table_list(list, &htl);
1933 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1934 if (type == 2 && !memcmp(tmp2->data, tmp, len)) {
1935 silc_hash_table_del_by_context(list, (void *)2, tmp2);
1939 silc_hash_table_list_reset(&htl);
1941 } else if (type == 3) {
1944 /* Delete from the invite list */
1945 silc_hash_table_list(list, &htl);
1946 while (silc_hash_table_get(&htl, (void *)&type, (void *)&tmp2)) {
1947 if (type == 3 && !memcmp(tmp2->data, tmp, len)) {
1948 silc_hash_table_del_by_context(list, (void *)3, tmp2);
1952 silc_hash_table_list_reset(&htl);
1955 tmp = silc_argument_get_next_arg(args, &type, &len);
1962 /* Destructor for invite and ban list entrys */
1964 void silc_server_inviteban_destruct(void *key, void *context,
1967 silc_buffer_free(context);
1970 /* Creates connections accoring to configuration. */
1972 void silc_server_create_connections(SilcServer server)
1974 silc_schedule_task_del_by_callback(server->schedule,
1975 silc_server_connect_to_router);
1976 silc_schedule_task_add_timeout(server->schedule,
1977 silc_server_connect_to_router, server, 0, 1);
1981 silc_server_process_channel_pk_destruct(void *key, void *context,
1985 silc_pkcs_public_key_free(context);
1988 /* Processes a channel public key, either adds or removes it. */
1991 silc_server_process_channel_pk(SilcServer server,
1992 SilcChannelEntry channel,
1993 SilcUInt32 type, const unsigned char *pk,
1996 unsigned char pkhash[20];
1999 SILC_LOG_DEBUG(("Processing channel public key"));
2002 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2004 /* Decode the public key */
2005 if (!silc_public_key_payload_decode((unsigned char *)pk, pk_len, &chpk))
2006 return SILC_STATUS_ERR_UNSUPPORTED_PUBLIC_KEY;
2008 /* Create channel public key list (hash table) if needed */
2009 if (!channel->channel_pubkeys) {
2010 channel->channel_pubkeys =
2011 silc_hash_table_alloc(0, silc_hash_data, (void *)20,
2012 silc_hash_data_compare, (void *)20,
2013 silc_server_process_channel_pk_destruct, channel,
2017 /* Create SHA-1 digest of the public key data */
2018 silc_hash_make(server->sha1hash, pk + 4, pk_len - 4, pkhash);
2021 /* Add new public key to channel public key list */
2022 SILC_LOG_DEBUG(("Add new channel public key to channel %s",
2023 channel->channel_name));
2025 /* Check for resource limit */
2026 if (silc_hash_table_count(channel->channel_pubkeys) > 64) {
2027 silc_pkcs_public_key_free(chpk);
2028 return SILC_STATUS_ERR_RESOURCE_LIMIT;
2031 /* Add if doesn't exist already */
2032 if (!silc_hash_table_find(channel->channel_pubkeys, pkhash,
2034 silc_hash_table_add(channel->channel_pubkeys, silc_memdup(pkhash, 20),
2036 } else if (type == 0x01) {
2037 /* Delete public key from channel public key list */
2038 SILC_LOG_DEBUG(("Delete a channel public key from channel %s",
2039 channel->channel_name));
2040 if (!silc_hash_table_del(channel->channel_pubkeys, pkhash))
2041 silc_pkcs_public_key_free(chpk);
2043 silc_pkcs_public_key_free(chpk);
2044 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2047 return SILC_STATUS_OK;
2050 /* Returns the channel public keys as Argument List payload. */
2052 SilcBuffer silc_server_get_channel_pk_list(SilcServer server,
2053 SilcChannelEntry channel,
2057 SilcHashTableList htl;
2058 SilcBuffer list, pkp;
2061 SILC_LOG_DEBUG(("Encoding channel public keys list"));
2063 if (!channel->channel_pubkeys ||
2064 !silc_hash_table_count(channel->channel_pubkeys))
2067 /* Encode the list */
2068 list = silc_buffer_alloc_size(2);
2069 silc_buffer_format(list,
2070 SILC_STR_UI_SHORT(silc_hash_table_count(
2071 channel->channel_pubkeys)),
2074 silc_hash_table_list(channel->channel_pubkeys, &htl);
2075 while (silc_hash_table_get(&htl, NULL, (void *)&pk)) {
2076 pkp = silc_public_key_payload_encode(pk);
2077 list = silc_argument_payload_encode_one(list, pkp->data,
2078 silc_buffer_len(pkp),
2080 delete ? 0x01 : 0x00);
2081 silc_buffer_free(pkp);
2083 silc_hash_table_list_reset(&htl);
2088 /* Sets the channel public keys into channel from the list of public keys. */
2090 SilcStatus silc_server_set_channel_pk_list(SilcServer server,
2091 SilcPacketStream sender,
2092 SilcChannelEntry channel,
2093 const unsigned char *pklist,
2094 SilcUInt32 pklist_len)
2097 SilcArgumentPayload args;
2098 unsigned char *chpk;
2099 SilcUInt32 chpklen, type;
2100 SilcStatus ret = SILC_STATUS_OK;
2102 SILC_LOG_DEBUG(("Setting channel public keys list"));
2104 if (!pklist || pklist_len < 2)
2105 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2107 /* Get the argument from the Argument List Payload */
2108 SILC_GET16_MSB(argc, pklist);
2109 args = silc_argument_payload_parse(pklist + 2, pklist_len - 2, argc);
2111 return SILC_STATUS_ERR_NOT_ENOUGH_PARAMS;
2113 /* Process the public keys one by one */
2114 chpk = silc_argument_get_first_arg(args, &type, &chpklen);
2116 /* If announcing keys and we have them set already, do not allow this */
2117 if (chpk && type == 0x03 && channel->channel_pubkeys &&
2118 server->server_type == SILC_ROUTER &&
2119 sender != SILC_PRIMARY_ROUTE(server)) {
2120 SILC_LOG_DEBUG(("Channel public key list set already, enforce our list"));
2121 silc_argument_payload_free(args);
2122 return SILC_STATUS_ERR_OPERATION_ALLOWED;
2125 /* If we are normal server and receive announcement list and we already
2126 have keys set, we replace the old list with the announced one. */
2127 if (chpk && type == 0x03 && channel->channel_pubkeys &&
2128 server->server_type != SILC_ROUTER) {
2130 unsigned char mask[4], ulimit[4];
2132 SILC_LOG_DEBUG(("Router enforces its list, remove old list"));
2133 silc_hash_table_free(channel->channel_pubkeys);
2134 channel->channel_pubkeys = NULL;
2136 /* Send notify that removes the old list */
2137 sidp = silc_id_payload_encode(server->id, SILC_ID_SERVER);
2138 SILC_PUT32_MSB((channel->mode & (~SILC_CHANNEL_MODE_CHANNEL_AUTH)), mask);
2139 if (channel->mode & SILC_CHANNEL_MODE_ULIMIT)
2140 SILC_PUT32_MSB(channel->user_limit, ulimit);
2141 silc_server_send_notify_to_channel(server, NULL, channel, FALSE, TRUE,
2142 SILC_NOTIFY_TYPE_CMODE_CHANGE, 8,
2143 sidp->data, silc_buffer_len(sidp),
2147 strlen(channel->cipher) : 0,
2149 channel->hmac_name ?
2150 strlen(channel->hmac_name) : 0,
2151 channel->passphrase,
2152 channel->passphrase ?
2153 strlen(channel->passphrase) : 0,
2156 SILC_CHANNEL_MODE_ULIMIT ?
2159 SILC_CHANNEL_MODE_ULIMIT ?
2160 sizeof(ulimit) : 0));
2161 silc_buffer_free(sidp);
2167 ret = silc_server_process_channel_pk(server, channel, type,
2169 if (ret != SILC_STATUS_OK)
2171 chpk = silc_argument_get_next_arg(args, &type, &chpklen);
2174 silc_argument_payload_free(args);
2178 /* Verifies the Authentication Payload `auth' with one of the public keys
2179 on the `channel' public key list. */
2181 SilcBool silc_server_verify_channel_auth(SilcServer server,
2182 SilcChannelEntry channel,
2183 SilcClientID *client_id,
2184 const unsigned char *auth,
2185 SilcUInt32 auth_len)
2189 unsigned char *pkhash;
2190 SilcUInt32 pkhash_len;
2191 SilcBool ret = FALSE;
2193 SILC_LOG_DEBUG(("Verifying channel authentication"));
2195 if (!auth || !auth_len || !channel->channel_pubkeys)
2198 /* Get the hash from the auth data which tells us what public key we
2199 must use in verification. */
2201 ap = silc_auth_payload_parse(auth, auth_len);
2205 pkhash = silc_auth_get_public_data(ap, &pkhash_len);
2206 if (pkhash_len < 128)
2209 /* Find the public key with the hash */
2210 if (!silc_hash_table_find(channel->channel_pubkeys, pkhash,
2211 NULL, (void *)&chpk)) {
2212 SILC_LOG_DEBUG(("Public key not found in channel public key list"));
2216 /* Verify the signature */
2217 if (!silc_auth_verify(ap, SILC_AUTH_PUBLIC_KEY, (void *)chpk, 0,
2218 server->sha1hash, client_id, SILC_ID_CLIENT)) {
2219 SILC_LOG_DEBUG(("Authentication failed"));
2226 silc_auth_payload_free(ap);