5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 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; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
22 #include "serverincludes.h"
24 #include "server_internal.h"
26 /******************************************************************************
30 ******************************************************************************/
32 /* This function is used to add keys and stuff to common ID entry data
35 void silc_idlist_add_data(void *entry, SilcIDListData idata)
37 SilcIDListData data = (SilcIDListData)entry;
38 data->send_key = idata->send_key;
39 data->receive_key = idata->receive_key;
40 data->hmac_send = idata->hmac_send;
41 data->hmac_receive = idata->hmac_receive;
42 data->psn_send = idata->psn_send;
43 data->psn_receive = idata->psn_receive;
44 data->hash = idata->hash;
45 data->public_key = idata->public_key;
46 memcpy(data->fingerprint, idata->fingerprint, sizeof(data->fingerprint));
47 data->rekey = idata->rekey;
48 data->last_receive = idata->last_receive;
49 data->last_sent = idata->last_sent;
50 data->status = idata->status;
52 data->created = time(0); /* Update creation time */
55 /* Free's all data in the common ID entry data structure. */
57 void silc_idlist_del_data(void *entry)
59 SilcIDListData idata = (SilcIDListData)entry;
61 silc_cipher_free(idata->send_key);
62 if (idata->receive_key)
63 silc_cipher_free(idata->receive_key);
65 if (idata->rekey->send_enc_key) {
66 memset(idata->rekey->send_enc_key, 0, idata->rekey->enc_key_len);
67 silc_free(idata->rekey->send_enc_key);
69 silc_free(idata->rekey);
72 silc_hmac_free(idata->hmac_send);
73 if (idata->hmac_receive)
74 silc_hmac_free(idata->hmac_receive);
76 silc_hash_free(idata->hash);
77 if (idata->public_key)
78 silc_pkcs_public_key_free(idata->public_key);
80 idata->send_key = NULL;
81 idata->receive_key = NULL;
83 idata->hmac_send = NULL;
84 idata->hmac_receive = NULL;
86 idata->public_key = NULL;
91 SILC_TASK_CALLBACK_GLOBAL(silc_idlist_purge)
93 SilcIDListPurge i = (SilcIDListPurge)context;
95 SILC_LOG_DEBUG(("Purging cache"));
97 silc_idcache_purge(i->cache);
98 silc_schedule_task_add(i->schedule, 0,
100 (void *)i, i->timeout, 0,
101 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
104 /******************************************************************************
106 Server entry functions
108 ******************************************************************************/
110 /* Add new server entry. This adds the new server entry to ID cache and
111 returns the allocated entry object or NULL on error. This is called
112 when new server connects to us. We also add ourselves to cache with
116 silc_idlist_add_server(SilcIDList id_list,
117 char *server_name, int server_type,
118 SilcServerID *id, SilcServerEntry router,
121 SilcServerEntry server;
123 SILC_LOG_DEBUG(("Adding new server entry"));
125 server = silc_calloc(1, sizeof(*server));
126 server->server_name = server_name;
127 server->server_type = server_type;
129 server->router = router;
130 server->connection = connection;
132 if (!silc_idcache_add(id_list->servers, server->server_name,
133 (void *)server->id, (void *)server, 0, NULL)) {
141 /* Finds server by Server ID */
144 silc_idlist_find_server_by_id(SilcIDList id_list, SilcServerID *id,
145 bool registered, SilcIDCacheEntry *ret_entry)
147 SilcIDCacheEntry id_cache = NULL;
148 SilcServerEntry server;
153 SILC_LOG_DEBUG(("Server ID (%s)",
154 silc_id_render(id, SILC_ID_SERVER)));
156 if (!silc_idcache_find_by_id_one(id_list->servers, (void *)id,
160 server = (SilcServerEntry)id_cache->context;
163 *ret_entry = id_cache;
165 if (server && registered &&
166 !(server->data.status & SILC_IDLIST_STATUS_REGISTERED))
169 SILC_LOG_DEBUG(("Found"));
174 /* Find server by name */
177 silc_idlist_find_server_by_name(SilcIDList id_list, char *name,
178 bool registered, SilcIDCacheEntry *ret_entry)
180 SilcIDCacheEntry id_cache = NULL;
181 SilcServerEntry server;
183 SILC_LOG_DEBUG(("Server by name `%s'", name));
185 if (!silc_idcache_find_by_name_one(id_list->servers, name, &id_cache))
188 server = (SilcServerEntry)id_cache->context;
191 *ret_entry = id_cache;
193 if (server && registered &&
194 !(server->data.status & SILC_IDLIST_STATUS_REGISTERED))
197 SILC_LOG_DEBUG(("Found"));
202 /* Find server by connection parameters, hostname and port */
205 silc_idlist_find_server_by_conn(SilcIDList id_list, char *hostname,
206 int port, bool registered,
207 SilcIDCacheEntry *ret_entry)
209 SilcIDCacheList list = NULL;
210 SilcIDCacheEntry id_cache = NULL;
211 SilcServerEntry server = NULL;
212 SilcSocketConnection sock;
214 SILC_LOG_DEBUG(("Server by hostname %s and port %d", hostname, port));
216 if (!silc_idcache_get_all(id_list->servers, &list))
219 if (!silc_idcache_list_first(list, &id_cache)) {
220 silc_idcache_list_free(list);
225 server = (SilcServerEntry)id_cache->context;
226 sock = (SilcSocketConnection)server->connection;
228 if (sock && ((sock->hostname && !strcasecmp(sock->hostname, hostname)) ||
229 (sock->ip && !strcasecmp(sock->ip, hostname)))
230 && sock->port == port)
236 if (!silc_idcache_list_next(list, &id_cache))
240 silc_idcache_list_free(list);
243 *ret_entry = id_cache;
245 if (server && registered &&
246 !(server->data.status & SILC_IDLIST_STATUS_REGISTERED))
249 SILC_LOG_DEBUG(("Found"));
254 /* Replaces old Server ID with new one */
257 silc_idlist_replace_server_id(SilcIDList id_list, SilcServerID *old_id,
258 SilcServerID *new_id)
260 SilcIDCacheEntry id_cache = NULL;
261 SilcServerEntry server;
263 if (!old_id || !new_id)
266 SILC_LOG_DEBUG(("Replacing Server ID"));
268 if (!silc_idcache_find_by_id_one(id_list->servers, (void *)old_id,
272 server = (SilcServerEntry)id_cache->context;
274 /* Remove the old entry and add a new one */
276 silc_idcache_del_by_id(id_list->servers, (void *)server->id);
278 silc_free(server->id);
281 silc_idcache_add(id_list->servers, server->server_name, server->id,
284 SILC_LOG_DEBUG(("Found"));
289 /* Removes and free's server entry from ID list */
291 int silc_idlist_del_server(SilcIDList id_list, SilcServerEntry entry)
294 /* Remove from cache */
295 if (!silc_idcache_del_by_context(id_list->servers, entry))
298 SILC_LOG_DEBUG(("Deleting server %s", entry->server_name ?
299 entry->server_name : ""));
302 silc_free(entry->server_name);
303 silc_free(entry->id);
304 silc_free(entry->server_info);
306 memset(entry, 'F', sizeof(*entry));
314 /******************************************************************************
316 Client entry functions
318 ******************************************************************************/
320 /* Add new client entry. This adds the client entry to ID cache system
321 and returns the allocated client entry or NULL on error. This is
322 called when new client connection is accepted to the server. If The
323 `router' is provided then the all server routines assume that the client
324 is not directly connected local client but it has router set and is
325 remote. If this is the case then `connection' must be NULL. If, on the
326 other hand, the `connection' is provided then the client is assumed
327 to be directly connected local client and `router' must be NULL. */
330 silc_idlist_add_client(SilcIDList id_list, char *nickname, char *username,
331 char *userinfo, SilcClientID *id,
332 SilcServerEntry router, void *connection,
335 SilcClientEntry client;
337 SILC_LOG_DEBUG(("Adding new client entry"));
339 client = silc_calloc(1, sizeof(*client));
340 client->nickname = nickname;
341 client->username = username;
342 client->userinfo = userinfo;
344 client->router = router;
345 client->connection = connection;
346 client->channels = silc_hash_table_alloc(3, silc_hash_ptr, NULL,
347 NULL, NULL, NULL, NULL, TRUE);
349 if (!silc_idcache_add(id_list->clients, nickname, (void *)client->id,
350 (void *)client, expire, NULL)) {
351 silc_hash_table_free(client->channels);
359 /* Free client entry. This free's everything and removes the entry
360 from ID cache. Call silc_idlist_del_data before calling this one. */
362 int silc_idlist_del_client(SilcIDList id_list, SilcClientEntry entry)
364 SILC_LOG_DEBUG(("Start"));
367 /* Remove from cache */
368 if (!silc_idcache_del_by_context(id_list->clients, entry))
372 silc_free(entry->nickname);
373 silc_free(entry->servername);
374 silc_free(entry->username);
375 silc_free(entry->userinfo);
376 silc_free(entry->id);
377 silc_hash_table_free(entry->channels);
379 memset(entry, 'F', sizeof(*entry));
388 /* Returns all clients matching requested nickname. Number of clients is
389 returned to `clients_count'. Caller must free the returned table. */
391 int silc_idlist_get_clients_by_nickname(SilcIDList id_list, char *nickname,
393 SilcClientEntry **clients,
394 SilcUInt32 *clients_count)
396 SilcIDCacheList list = NULL;
397 SilcIDCacheEntry id_cache = NULL;
399 SILC_LOG_DEBUG(("Start"));
401 if (!silc_idcache_find_by_name(id_list->clients, nickname, &list))
404 *clients = silc_realloc(*clients,
405 (silc_idcache_list_count(list) + *clients_count) *
408 silc_idcache_list_first(list, &id_cache);
409 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
411 while (silc_idcache_list_next(list, &id_cache))
412 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
414 silc_idcache_list_free(list);
416 SILC_LOG_DEBUG(("Found total %d clients", *clients_count));
421 /* Returns all clients matching requested nickname hash. Number of clients
422 is returned to `clients_count'. Caller must free the returned table. */
424 int silc_idlist_get_clients_by_hash(SilcIDList id_list, char *nickname,
426 SilcClientEntry **clients,
427 SilcUInt32 *clients_count)
429 SilcIDCacheList list = NULL;
430 SilcIDCacheEntry id_cache = NULL;
431 unsigned char hash[32];
432 SilcClientID client_id;
435 SILC_LOG_DEBUG(("Start"));
437 memset(nick, 0, sizeof(nick));
438 silc_to_lower(nickname, nick, sizeof(nick) - 1);
439 silc_hash_make(md5hash, nick, strlen(nick), hash);
441 /* As the Client ID is hashed in the ID cache by hashing only the hash
442 from the Client ID, we can do a lookup with only the hash not the
443 other parts of the ID and get all the clients with that hash, ie.
444 with that nickname, as the hash is from the nickname. */
445 memset(&client_id, 0, sizeof(client_id));
446 memcpy(&client_id.hash, hash, sizeof(client_id.hash));
447 if (!silc_idcache_find_by_id(id_list->clients, &client_id, &list))
450 *clients = silc_realloc(*clients,
451 (silc_idcache_list_count(list) + *clients_count) *
454 silc_idcache_list_first(list, &id_cache);
455 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
457 while (silc_idcache_list_next(list, &id_cache))
458 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
460 silc_idcache_list_free(list);
462 SILC_LOG_DEBUG(("Found total %d clients", *clients_count));
467 /* Finds client by Client ID */
470 silc_idlist_find_client_by_id(SilcIDList id_list, SilcClientID *id,
471 bool registered, SilcIDCacheEntry *ret_entry)
473 SilcIDCacheEntry id_cache = NULL;
474 SilcClientEntry client;
479 SILC_LOG_DEBUG(("Client ID (%s)",
480 silc_id_render(id, SILC_ID_CLIENT)));
482 /* Do extended search since the normal ID comparison function for
483 Client ID's compares only the hash from the Client ID and not the
484 entire ID. The silc_hash_client_id_compare compares the entire
485 Client ID as we want to find one specific Client ID. */
486 if (!silc_idcache_find_by_id_one_ext(id_list->clients, (void *)id,
488 silc_hash_client_id_compare, NULL,
492 client = (SilcClientEntry)id_cache->context;
495 *ret_entry = id_cache;
497 if (client && registered &&
498 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
501 SILC_LOG_DEBUG(("Found"));
506 /* Replaces old Client ID with new one */
509 silc_idlist_replace_client_id(SilcServer server,
510 SilcIDList id_list, SilcClientID *old_id,
511 SilcClientID *new_id, const char *nickname)
513 SilcIDCacheEntry id_cache = NULL;
514 SilcClientEntry client;
516 if (!old_id || !new_id)
519 SILC_LOG_DEBUG(("Replacing Client ID"));
521 /* Do extended search since the normal ID comparison function for
522 Client ID's compares only the hash from the Client ID and not the
523 entire ID. The silc_hash_client_id_compare compares the entire
524 Client ID as we want to find one specific Client ID. */
525 if (!silc_idcache_find_by_id_one_ext(id_list->clients, (void *)old_id,
527 silc_hash_client_id_compare, NULL,
531 client = (SilcClientEntry)id_cache->context;
533 /* Remove the old entry and add a new one */
535 if (!silc_idcache_del_by_context(id_list->clients, client))
538 /* Check if anyone is watching old nickname */
539 if (server->server_type == SILC_ROUTER)
540 silc_server_check_watcher_list(server, client, nickname,
541 SILC_NOTIFY_TYPE_NICK_CHANGE);
543 silc_free(client->id);
544 silc_free(client->nickname);
546 client->nickname = nickname ? strdup(nickname) : NULL;
548 /* Check if anyone is watching new nickname */
549 if (server->server_type == SILC_ROUTER)
550 silc_server_check_watcher_list(server, client, nickname,
551 SILC_NOTIFY_TYPE_NICK_CHANGE);
553 if (!silc_idcache_add(id_list->clients, client->nickname, client->id,
557 SILC_LOG_DEBUG(("Replaced"));
562 /* Client cache entry destructor that is called when the cache is purged. */
564 void silc_idlist_client_destructor(SilcIDCache cache,
565 SilcIDCacheEntry entry)
567 SilcClientEntry client;
569 client = (SilcClientEntry)entry->context;
571 silc_free(client->nickname);
572 silc_free(client->username);
573 silc_free(client->userinfo);
574 silc_free(client->id);
575 silc_hash_table_free(client->channels);
577 memset(client, 'A', sizeof(*client));
582 /******************************************************************************
584 Channel entry functions
586 ******************************************************************************/
588 /* Add new channel entry. This add the new channel entry to the ID cache
589 system and returns the allocated entry or NULL on error. */
592 silc_idlist_add_channel(SilcIDList id_list, char *channel_name, int mode,
593 SilcChannelID *id, SilcServerEntry router,
594 SilcCipher channel_key, SilcHmac hmac,
597 SilcChannelEntry channel;
599 SILC_LOG_DEBUG(("Adding new channel %s", channel_name));
601 channel = silc_calloc(1, sizeof(*channel));
602 channel->channel_name = channel_name;
603 channel->mode = mode;
605 channel->router = router;
606 channel->channel_key = channel_key;
607 channel->hmac = hmac;
608 channel->created = channel->updated = time(0);
610 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
615 channel->user_list = silc_hash_table_alloc(3, silc_hash_ptr, NULL, NULL,
616 NULL, NULL, NULL, TRUE);
618 if (!silc_idcache_add(id_list->channels, channel->channel_name,
619 (void *)channel->id, (void *)channel, expire, NULL)) {
620 silc_hmac_free(channel->hmac);
621 silc_hash_table_free(channel->user_list);
629 /* Foreach callbcak to free all users from the channel when deleting a
632 static void silc_idlist_del_channel_foreach(void *key, void *context,
635 SilcChannelClientEntry chl = (SilcChannelClientEntry)context;
637 SILC_LOG_DEBUG(("Removing client %s from channel %s",
638 chl->client->nickname ? chl->client->nickname :
639 (unsigned char *)"", chl->channel->channel_name));
641 /* Remove the context from the client's channel hash table as that
642 table and channel's user_list hash table share this same context. */
643 silc_hash_table_del(chl->client->channels, chl->channel);
647 /* Free channel entry. This free's everything. */
649 int silc_idlist_del_channel(SilcIDList id_list, SilcChannelEntry entry)
652 /* Remove from cache */
653 if (!silc_idcache_del_by_context(id_list->channels, entry))
656 SILC_LOG_DEBUG(("Deleting channel %s", entry->channel_name));
658 /* Free all client entrys from the users list. The silc_hash_table_free
659 will free all the entries so they are not freed at the foreach
661 silc_hash_table_foreach(entry->user_list, silc_idlist_del_channel_foreach,
663 silc_hash_table_free(entry->user_list);
666 silc_free(entry->channel_name);
667 silc_free(entry->id);
668 silc_free(entry->topic);
669 if (entry->channel_key)
670 silc_cipher_free(entry->channel_key);
672 memset(entry->key, 0, entry->key_len / 8);
673 silc_free(entry->key);
675 silc_free(entry->cipher);
677 silc_hmac_free(entry->hmac);
678 silc_free(entry->hmac_name);
679 silc_free(entry->rekey);
680 if (entry->founder_key)
681 silc_pkcs_public_key_free(entry->founder_key);
683 memset(entry, 'F', sizeof(*entry));
691 /* Finds channel by channel name. Channel names are unique and they
692 are not case-sensitive. */
695 silc_idlist_find_channel_by_name(SilcIDList id_list, char *name,
696 SilcIDCacheEntry *ret_entry)
698 SilcIDCacheEntry id_cache = NULL;
700 SILC_LOG_DEBUG(("Channel by name %s", name));
702 if (!silc_idcache_find_by_name_one(id_list->channels, name, &id_cache))
706 *ret_entry = id_cache;
708 SILC_LOG_DEBUG(("Found"));
711 ((SilcChannelEntry)id_cache->context)->updated = time(NULL);
713 return id_cache->context;
716 /* Finds channel by Channel ID. */
719 silc_idlist_find_channel_by_id(SilcIDList id_list, SilcChannelID *id,
720 SilcIDCacheEntry *ret_entry)
722 SilcIDCacheEntry id_cache = NULL;
723 SilcChannelEntry channel;
728 SILC_LOG_DEBUG(("Channel ID (%s)",
729 silc_id_render(id, SILC_ID_CHANNEL)));
731 if (!silc_idcache_find_by_id_one(id_list->channels, (void *)id, &id_cache))
734 channel = (SilcChannelEntry)id_cache->context;
737 *ret_entry = id_cache;
739 SILC_LOG_DEBUG(("Found"));
742 channel->updated = time(NULL);
747 /* Replaces old Channel ID with new one. This is done when router forces
748 normal server to change Channel ID. */
751 silc_idlist_replace_channel_id(SilcIDList id_list, SilcChannelID *old_id,
752 SilcChannelID *new_id)
754 SilcIDCacheEntry id_cache = NULL;
755 SilcChannelEntry channel;
757 if (!old_id || !new_id)
760 SILC_LOG_DEBUG(("Replacing Channel ID"));
762 if (!silc_idcache_find_by_id_one(id_list->channels, (void *)old_id,
766 channel = (SilcChannelEntry)id_cache->context;
768 /* Remove the old entry and add a new one */
770 silc_idcache_del_by_id(id_list->channels, (void *)channel->id);
772 silc_free(channel->id);
773 channel->id = new_id;
775 silc_idcache_add(id_list->channels, channel->channel_name, channel->id,
778 SILC_LOG_DEBUG(("Replaced"));
781 channel->updated = time(NULL);
786 /* Returns channels from the ID list. If the `channel_id' is NULL then
787 all channels are returned. */
790 silc_idlist_get_channels(SilcIDList id_list, SilcChannelID *channel_id,
791 SilcUInt32 *channels_count)
793 SilcIDCacheList list = NULL;
794 SilcIDCacheEntry id_cache = NULL;
795 SilcChannelEntry *channels = NULL;
798 SILC_LOG_DEBUG(("Start"));
801 if (!silc_idcache_get_all(id_list->channels, &list))
804 channels = silc_calloc(silc_idcache_list_count(list), sizeof(*channels));
807 silc_idcache_list_first(list, &id_cache);
808 channels[i++] = (SilcChannelEntry)id_cache->context;
810 while (silc_idcache_list_next(list, &id_cache))
811 channels[i++] = (SilcChannelEntry)id_cache->context;
813 silc_idcache_list_free(list);
815 if (!silc_idcache_find_by_id_one(id_list->channels, channel_id, &id_cache))
819 channels = silc_calloc(1, sizeof(*channels));
820 channels[0] = (SilcChannelEntry)id_cache->context;