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;
162 if (server && registered &&
163 !(server->data.status & SILC_IDLIST_STATUS_REGISTERED))
167 *ret_entry = id_cache;
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;
190 if (server && registered &&
191 !(server->data.status & SILC_IDLIST_STATUS_REGISTERED))
195 *ret_entry = id_cache;
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);
242 if (server && registered &&
243 !(server->data.status & SILC_IDLIST_STATUS_REGISTERED))
247 *ret_entry = id_cache;
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))
371 assert(!silc_hash_table_count(entry->channels));
374 silc_free(entry->nickname);
375 silc_free(entry->servername);
376 silc_free(entry->username);
377 silc_free(entry->userinfo);
378 silc_free(entry->id);
379 silc_hash_table_free(entry->channels);
381 memset(entry, 'F', sizeof(*entry));
390 /* Returns all clients matching requested nickname. Number of clients is
391 returned to `clients_count'. Caller must free the returned table. */
393 int silc_idlist_get_clients_by_nickname(SilcIDList id_list, char *nickname,
395 SilcClientEntry **clients,
396 SilcUInt32 *clients_count)
398 SilcIDCacheList list = NULL;
399 SilcIDCacheEntry id_cache = NULL;
401 SILC_LOG_DEBUG(("Start"));
403 if (!silc_idcache_find_by_name(id_list->clients, nickname, &list))
406 *clients = silc_realloc(*clients,
407 (silc_idcache_list_count(list) + *clients_count) *
410 silc_idcache_list_first(list, &id_cache);
411 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
413 while (silc_idcache_list_next(list, &id_cache))
414 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
416 silc_idcache_list_free(list);
418 SILC_LOG_DEBUG(("Found total %d clients", *clients_count));
423 /* Returns all clients matching requested nickname hash. Number of clients
424 is returned to `clients_count'. Caller must free the returned table. */
426 int silc_idlist_get_clients_by_hash(SilcIDList id_list, char *nickname,
428 SilcClientEntry **clients,
429 SilcUInt32 *clients_count)
431 SilcIDCacheList list = NULL;
432 SilcIDCacheEntry id_cache = NULL;
433 unsigned char hash[32];
434 SilcClientID client_id;
437 SILC_LOG_DEBUG(("Start"));
439 memset(nick, 0, sizeof(nick));
440 silc_to_lower(nickname, nick, sizeof(nick) - 1);
441 silc_hash_make(md5hash, nick, strlen(nick), hash);
443 /* As the Client ID is hashed in the ID cache by hashing only the hash
444 from the Client ID, we can do a lookup with only the hash not the
445 other parts of the ID and get all the clients with that hash, ie.
446 with that nickname, as the hash is from the nickname. */
447 memset(&client_id, 0, sizeof(client_id));
448 memcpy(&client_id.hash, hash, sizeof(client_id.hash));
449 if (!silc_idcache_find_by_id(id_list->clients, &client_id, &list))
452 *clients = silc_realloc(*clients,
453 (silc_idcache_list_count(list) + *clients_count) *
456 silc_idcache_list_first(list, &id_cache);
457 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
459 while (silc_idcache_list_next(list, &id_cache))
460 (*clients)[(*clients_count)++] = (SilcClientEntry)id_cache->context;
462 silc_idcache_list_free(list);
464 SILC_LOG_DEBUG(("Found total %d clients", *clients_count));
469 /* Finds client by Client ID */
472 silc_idlist_find_client_by_id(SilcIDList id_list, SilcClientID *id,
473 bool registered, SilcIDCacheEntry *ret_entry)
475 SilcIDCacheEntry id_cache = NULL;
476 SilcClientEntry client;
481 SILC_LOG_DEBUG(("Client ID (%s)",
482 silc_id_render(id, SILC_ID_CLIENT)));
484 /* Do extended search since the normal ID comparison function for
485 Client ID's compares only the hash from the Client ID and not the
486 entire ID. The silc_hash_client_id_compare compares the entire
487 Client ID as we want to find one specific Client ID. */
488 if (!silc_idcache_find_by_id_one_ext(id_list->clients, (void *)id,
490 silc_hash_client_id_compare, NULL,
494 client = (SilcClientEntry)id_cache->context;
496 if (client && registered &&
497 !(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
501 *ret_entry = id_cache;
503 SILC_LOG_DEBUG(("Found"));
508 /* Replaces old Client ID with new one */
511 silc_idlist_replace_client_id(SilcServer server,
512 SilcIDList id_list, SilcClientID *old_id,
513 SilcClientID *new_id, const char *nickname)
515 SilcIDCacheEntry id_cache = NULL;
516 SilcClientEntry client;
518 if (!old_id || !new_id)
521 SILC_LOG_DEBUG(("Replacing Client ID"));
523 /* Do extended search since the normal ID comparison function for
524 Client ID's compares only the hash from the Client ID and not the
525 entire ID. The silc_hash_client_id_compare compares the entire
526 Client ID as we want to find one specific Client ID. */
527 if (!silc_idcache_find_by_id_one_ext(id_list->clients, (void *)old_id,
529 silc_hash_client_id_compare, NULL,
533 client = (SilcClientEntry)id_cache->context;
535 /* Remove the old entry and add a new one */
537 if (!silc_idcache_del_by_context(id_list->clients, client))
540 /* Check if anyone is watching old nickname */
541 if (server->server_type == SILC_ROUTER)
542 silc_server_check_watcher_list(server, client, nickname,
543 SILC_NOTIFY_TYPE_NICK_CHANGE);
545 silc_free(client->id);
546 silc_free(client->nickname);
548 client->nickname = nickname ? strdup(nickname) : NULL;
550 /* Check if anyone is watching new nickname */
551 if (server->server_type == SILC_ROUTER)
552 silc_server_check_watcher_list(server, client, nickname,
553 SILC_NOTIFY_TYPE_NICK_CHANGE);
555 if (!silc_idcache_add(id_list->clients, client->nickname, client->id,
559 SILC_LOG_DEBUG(("Replaced"));
564 /* Client cache entry destructor that is called when the cache is purged. */
566 void silc_idlist_client_destructor(SilcIDCache cache,
567 SilcIDCacheEntry entry)
569 SilcClientEntry client;
571 client = (SilcClientEntry)entry->context;
573 assert(!silc_hash_table_count(client->channels));
574 silc_free(client->nickname);
575 silc_free(client->username);
576 silc_free(client->userinfo);
577 silc_free(client->id);
578 silc_hash_table_free(client->channels);
580 memset(client, 'A', sizeof(*client));
585 /******************************************************************************
587 Channel entry functions
589 ******************************************************************************/
591 /* Add new channel entry. This add the new channel entry to the ID cache
592 system and returns the allocated entry or NULL on error. */
595 silc_idlist_add_channel(SilcIDList id_list, char *channel_name, int mode,
596 SilcChannelID *id, SilcServerEntry router,
597 SilcCipher channel_key, SilcHmac hmac,
600 SilcChannelEntry channel;
602 SILC_LOG_DEBUG(("Adding new channel %s", channel_name));
604 channel = silc_calloc(1, sizeof(*channel));
605 channel->channel_name = channel_name;
606 channel->mode = mode;
608 channel->router = router;
609 channel->channel_key = channel_key;
610 channel->hmac = hmac;
611 channel->created = channel->updated = time(0);
613 if (!silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac)) {
618 channel->user_list = silc_hash_table_alloc(3, silc_hash_ptr, NULL, NULL,
619 NULL, NULL, NULL, TRUE);
621 if (!silc_idcache_add(id_list->channels, channel->channel_name,
622 (void *)channel->id, (void *)channel, expire, NULL)) {
623 silc_hmac_free(channel->hmac);
624 silc_hash_table_free(channel->user_list);
632 /* Foreach callbcak to free all users from the channel when deleting a
635 static void silc_idlist_del_channel_foreach(void *key, void *context,
638 SilcChannelClientEntry chl = (SilcChannelClientEntry)context;
640 SILC_LOG_DEBUG(("Removing client %s from channel %s",
641 chl->client->nickname ? chl->client->nickname :
642 (unsigned char *)"", chl->channel->channel_name));
644 /* Remove the context from the client's channel hash table as that
645 table and channel's user_list hash table share this same context. */
646 silc_hash_table_del(chl->client->channels, chl->channel);
650 /* Free channel entry. This free's everything. */
652 int silc_idlist_del_channel(SilcIDList id_list, SilcChannelEntry entry)
655 /* Remove from cache */
656 if (!silc_idcache_del_by_context(id_list->channels, entry))
659 SILC_LOG_DEBUG(("Deleting channel %s", entry->channel_name));
661 /* Free all client entrys from the users list. The silc_hash_table_free
662 will free all the entries so they are not freed at the foreach
664 silc_hash_table_foreach(entry->user_list, silc_idlist_del_channel_foreach,
666 silc_hash_table_free(entry->user_list);
669 silc_free(entry->channel_name);
670 silc_free(entry->id);
671 silc_free(entry->topic);
672 if (entry->channel_key)
673 silc_cipher_free(entry->channel_key);
675 memset(entry->key, 0, entry->key_len / 8);
676 silc_free(entry->key);
678 silc_free(entry->cipher);
680 silc_hmac_free(entry->hmac);
681 silc_free(entry->hmac_name);
682 silc_free(entry->rekey);
683 if (entry->founder_key)
684 silc_pkcs_public_key_free(entry->founder_key);
686 memset(entry, 'F', sizeof(*entry));
694 /* Finds channel by channel name. Channel names are unique and they
695 are not case-sensitive. */
698 silc_idlist_find_channel_by_name(SilcIDList id_list, char *name,
699 SilcIDCacheEntry *ret_entry)
701 SilcIDCacheEntry id_cache = NULL;
703 SILC_LOG_DEBUG(("Channel by name %s", name));
705 if (!silc_idcache_find_by_name_one(id_list->channels, name, &id_cache))
709 *ret_entry = id_cache;
711 SILC_LOG_DEBUG(("Found"));
714 ((SilcChannelEntry)id_cache->context)->updated = time(NULL);
716 return id_cache->context;
719 /* Finds channel by Channel ID. */
722 silc_idlist_find_channel_by_id(SilcIDList id_list, SilcChannelID *id,
723 SilcIDCacheEntry *ret_entry)
725 SilcIDCacheEntry id_cache = NULL;
726 SilcChannelEntry channel;
731 SILC_LOG_DEBUG(("Channel ID (%s)",
732 silc_id_render(id, SILC_ID_CHANNEL)));
734 if (!silc_idcache_find_by_id_one(id_list->channels, (void *)id, &id_cache))
737 channel = (SilcChannelEntry)id_cache->context;
740 *ret_entry = id_cache;
742 SILC_LOG_DEBUG(("Found"));
745 channel->updated = time(NULL);
750 /* Replaces old Channel ID with new one. This is done when router forces
751 normal server to change Channel ID. */
754 silc_idlist_replace_channel_id(SilcIDList id_list, SilcChannelID *old_id,
755 SilcChannelID *new_id)
757 SilcIDCacheEntry id_cache = NULL;
758 SilcChannelEntry channel;
760 if (!old_id || !new_id)
763 SILC_LOG_DEBUG(("Replacing Channel ID"));
765 if (!silc_idcache_find_by_id_one(id_list->channels, (void *)old_id,
769 channel = (SilcChannelEntry)id_cache->context;
771 /* Remove the old entry and add a new one */
773 silc_idcache_del_by_id(id_list->channels, (void *)channel->id);
775 silc_free(channel->id);
776 channel->id = new_id;
778 silc_idcache_add(id_list->channels, channel->channel_name, channel->id,
781 SILC_LOG_DEBUG(("Replaced"));
784 channel->updated = time(NULL);
789 /* Returns channels from the ID list. If the `channel_id' is NULL then
790 all channels are returned. */
793 silc_idlist_get_channels(SilcIDList id_list, SilcChannelID *channel_id,
794 SilcUInt32 *channels_count)
796 SilcIDCacheList list = NULL;
797 SilcIDCacheEntry id_cache = NULL;
798 SilcChannelEntry *channels = NULL;
801 SILC_LOG_DEBUG(("Start"));
804 if (!silc_idcache_get_all(id_list->channels, &list))
807 channels = silc_calloc(silc_idcache_list_count(list), sizeof(*channels));
810 silc_idcache_list_first(list, &id_cache);
811 channels[i++] = (SilcChannelEntry)id_cache->context;
813 while (silc_idcache_list_next(list, &id_cache))
814 channels[i++] = (SilcChannelEntry)id_cache->context;
816 silc_idcache_list_free(list);
818 if (!silc_idcache_find_by_id_one(id_list->channels, channel_id, &id_cache))
822 channels = silc_calloc(1, sizeof(*channels));
823 channels[0] = (SilcChannelEntry)id_cache->context;