5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 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.
21 * Server packet routines to handle received packets.
25 #include "serverincludes.h"
26 #include "server_internal.h"
28 extern char *server_version;
30 /* Received notify packet. Server can receive notify packets from router.
31 Server then relays the notify messages to clients if needed. */
33 void silc_server_notify(SilcServer server,
34 SilcSocketConnection sock,
35 SilcPacketContext *packet)
37 SilcNotifyPayload payload;
39 SilcArgumentPayload args;
40 SilcChannelID *channel_id = NULL, *channel_id2;
41 SilcClientID *client_id, *client_id2;
42 SilcServerID *server_id;
43 SilcChannelEntry channel;
44 SilcClientEntry client;
45 SilcServerEntry server_entry;
46 SilcChannelClientEntry chl;
47 SilcIDCacheEntry cache;
48 SilcHashTableList htl;
54 SILC_LOG_DEBUG(("Start"));
56 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
57 packet->src_id_type != SILC_ID_SERVER)
63 /* If the packet is destined directly to a client then relay the packet
64 before processing it. */
65 if (packet->dst_id_type == SILC_ID_CLIENT) {
67 SilcSocketConnection dst_sock;
69 /* Get the route to the client */
70 dst_sock = silc_server_get_client_route(server, packet->dst_id,
71 packet->dst_id_len, NULL, &idata);
73 /* Relay the packet */
74 silc_server_relay_packet(server, dst_sock, idata->send_key,
75 idata->hmac_receive, idata->psn_send++,
79 /* Parse the Notify Payload */
80 payload = silc_notify_payload_parse(packet->buffer->data,
85 /* If we are router and this packet is not already broadcast packet
86 we will broadcast it. The sending socket really cannot be router or
87 the router is buggy. If this packet is coming from router then it must
88 have the broadcast flag set already and we won't do anything. */
89 if (!server->standalone && server->server_type == SILC_ROUTER &&
90 sock->type == SILC_SOCKET_TYPE_SERVER &&
91 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
92 SILC_LOG_DEBUG(("Broadcasting received Notify packet"));
93 if (packet->dst_id_type == SILC_ID_CHANNEL) {
94 /* Packet is destined to channel */
95 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
100 silc_server_packet_send_dest(server, server->router->connection,
102 packet->flags | SILC_PACKET_FLAG_BROADCAST,
103 channel_id, SILC_ID_CHANNEL,
104 packet->buffer->data, packet->buffer->len,
106 silc_server_backup_send_dest(server, (SilcServerEntry)sock->user_data,
107 packet->type, packet->flags,
108 channel_id, SILC_ID_CHANNEL,
109 packet->buffer->data, packet->buffer->len,
112 /* Packet is destined to client or server */
113 silc_server_packet_send(server, server->router->connection,
115 packet->flags | SILC_PACKET_FLAG_BROADCAST,
116 packet->buffer->data, packet->buffer->len,
118 silc_server_backup_send(server, (SilcServerEntry)sock->user_data,
119 packet->type, packet->flags,
120 packet->buffer->data, packet->buffer->len,
125 type = silc_notify_get_type(payload);
126 args = silc_notify_get_args(payload);
131 case SILC_NOTIFY_TYPE_JOIN:
133 * Distribute the notify to local clients on the channel
135 SILC_LOG_DEBUG(("JOIN notify"));
138 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
141 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
145 /* Get channel entry */
146 channel = silc_idlist_find_channel_by_id(server->global_list,
149 channel = silc_idlist_find_channel_by_id(server->local_list,
152 silc_free(channel_id);
156 silc_free(channel_id);
159 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
162 client_id = silc_id_payload_parse_id(tmp, tmp_len);
166 /* If the the client is not in local list we check global list (ie. the
167 channel will be global channel) and if it does not exist then create
168 entry for the client. */
169 client = silc_idlist_find_client_by_id(server->global_list,
170 client_id, server->server_type,
173 client = silc_idlist_find_client_by_id(server->local_list,
174 client_id, server->server_type,
177 /* If router did not find the client the it is bogus */
178 if (server->server_type != SILC_SERVER)
182 silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
183 silc_id_dup(client_id, SILC_ID_CLIENT),
184 sock->user_data, NULL, 0);
186 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
187 silc_free(client_id);
191 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
195 /* Do not process the notify if the client is not registered */
196 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED))
199 /* Do not add client to channel if it is there already */
200 if (silc_server_client_on_channel(client, channel)) {
201 SILC_LOG_DEBUG(("Client already on channel"));
205 /* Send to channel */
206 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
207 FALSE, packet->buffer->data,
208 packet->buffer->len, FALSE);
210 if (server->server_type != SILC_ROUTER &&
211 sock->type == SILC_SOCKET_TYPE_ROUTER)
212 /* The channel is global now */
213 channel->global_users = TRUE;
215 SILC_LOG_DEBUG(("Joining to channel %s", channel->channel_name));
217 /* JOIN the global client to the channel (local clients (if router
218 created the channel) is joined in the pending JOIN command). */
219 chl = silc_calloc(1, sizeof(*chl));
220 chl->client = client;
221 chl->channel = channel;
223 /* If this is the first one on the channel then it is the founder of
225 if (!silc_hash_table_count(channel->user_list))
226 chl->mode = (SILC_CHANNEL_UMODE_CHANOP | SILC_CHANNEL_UMODE_CHANFO);
228 silc_hash_table_add(channel->user_list, client, chl);
229 silc_hash_table_add(client->channels, channel, chl);
230 silc_free(client_id);
231 channel->user_count++;
235 case SILC_NOTIFY_TYPE_LEAVE:
237 * Distribute the notify to local clients on the channel
239 SILC_LOG_DEBUG(("LEAVE notify"));
242 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
243 packet->dst_id_type);
248 /* Get channel entry */
249 channel = silc_idlist_find_channel_by_id(server->global_list,
252 channel = silc_idlist_find_channel_by_id(server->local_list,
255 silc_free(channel_id);
261 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
263 silc_free(channel_id);
266 client_id = silc_id_payload_parse_id(tmp, tmp_len);
268 silc_free(channel_id);
272 /* Get client entry */
273 client = silc_idlist_find_client_by_id(server->global_list,
274 client_id, TRUE, NULL);
276 client = silc_idlist_find_client_by_id(server->local_list,
277 client_id, TRUE, NULL);
279 silc_free(client_id);
280 silc_free(channel_id);
284 silc_free(client_id);
286 /* Check if on channel */
287 if (!silc_server_client_on_channel(client, channel))
290 /* Send the leave notify to channel */
291 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
292 FALSE, packet->buffer->data,
293 packet->buffer->len, FALSE);
295 /* Remove the user from channel */
296 silc_server_remove_from_one_channel(server, sock, channel, client, FALSE);
299 case SILC_NOTIFY_TYPE_SIGNOFF:
301 * Distribute the notify to local clients on the channel
303 SILC_LOG_DEBUG(("SIGNOFF notify"));
306 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
309 client_id = silc_id_payload_parse_id(tmp, tmp_len);
313 /* Get client entry */
314 client = silc_idlist_find_client_by_id(server->global_list,
315 client_id, TRUE, &cache);
317 client = silc_idlist_find_client_by_id(server->local_list,
318 client_id, TRUE, &cache);
320 silc_free(client_id);
324 silc_free(client_id);
326 /* Get signoff message */
327 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
331 /* Update statistics */
332 server->stat.clients--;
333 if (server->server_type == SILC_ROUTER)
334 server->stat.cell_clients--;
335 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
336 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
338 /* Remove the client from all channels. */
339 silc_server_remove_from_channels(server, NULL, client, TRUE, tmp, FALSE);
341 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
342 cache->expire = SILC_ID_CACHE_EXPIRE_DEF;
345 case SILC_NOTIFY_TYPE_TOPIC_SET:
347 * Distribute the notify to local clients on the channel
350 SILC_LOG_DEBUG(("TOPIC SET notify"));
353 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
354 packet->dst_id_type);
359 /* Get channel entry */
360 channel = silc_idlist_find_channel_by_id(server->global_list,
363 channel = silc_idlist_find_channel_by_id(server->local_list,
366 silc_free(channel_id);
372 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
374 silc_free(channel_id);
378 silc_free(channel->topic);
379 channel->topic = strdup(tmp);
381 /* Send the same notify to the channel */
382 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
383 FALSE, packet->buffer->data,
384 packet->buffer->len, FALSE);
385 silc_free(channel_id);
388 case SILC_NOTIFY_TYPE_NICK_CHANGE:
391 * Distribute the notify to local clients on the channel
393 unsigned char *id, *id2;
395 SILC_LOG_DEBUG(("NICK CHANGE notify"));
397 /* Get old client ID */
398 id = silc_argument_get_arg_type(args, 1, &tmp_len);
401 client_id = silc_id_payload_parse_id(id, tmp_len);
405 /* Get new client ID */
406 id2 = silc_argument_get_arg_type(args, 2, &tmp_len);
409 client_id2 = silc_id_payload_parse_id(id2, tmp_len);
413 SILC_LOG_DEBUG(("Old Client ID id(%s)",
414 silc_id_render(client_id, SILC_ID_CLIENT)));
415 SILC_LOG_DEBUG(("New Client ID id(%s)",
416 silc_id_render(client_id2, SILC_ID_CLIENT)));
418 /* Replace the Client ID */
419 client = silc_idlist_replace_client_id(server->global_list, client_id,
422 client = silc_idlist_replace_client_id(server->local_list, client_id,
426 /* The nickname is not valid anymore, set it NULL. This causes that
427 the nickname will be queried if someone wants to know it. */
428 if (client->nickname)
429 silc_free(client->nickname);
430 client->nickname = NULL;
432 /* Send the NICK_CHANGE notify type to local clients on the channels
433 this client is joined to. */
434 silc_server_send_notify_on_channels(server, NULL, client,
435 SILC_NOTIFY_TYPE_NICK_CHANGE, 2,
440 silc_free(client_id);
442 silc_free(client_id2);
446 case SILC_NOTIFY_TYPE_CMODE_CHANGE:
448 * Distribute the notify to local clients on the channel
451 SILC_LOG_DEBUG(("CMODE CHANGE notify"));
454 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
455 packet->dst_id_type);
460 /* Get channel entry */
461 channel = silc_idlist_find_channel_by_id(server->global_list,
464 channel = silc_idlist_find_channel_by_id(server->local_list,
467 silc_free(channel_id);
473 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
475 silc_free(channel_id);
479 SILC_GET32_MSB(mode, tmp);
481 /* Check if mode changed */
482 if (channel->mode == mode)
485 /* Send the same notify to the channel */
486 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
487 FALSE, packet->buffer->data,
488 packet->buffer->len, FALSE);
490 /* If the channel had private keys set and the mode was removed then
491 we must re-generate and re-distribute a new channel key */
492 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY &&
493 !(mode & SILC_CHANNEL_MODE_PRIVKEY)) {
494 /* Re-generate channel key */
495 if (!silc_server_create_channel_key(server, channel, 0))
498 /* Send the channel key. This sends it to our local clients and if
499 we are normal server to our router as well. */
500 silc_server_send_channel_key(server, NULL, channel,
501 server->server_type == SILC_ROUTER ?
502 FALSE : !server->standalone);
506 channel->mode = mode;
507 silc_free(channel_id);
510 tmp = silc_argument_get_arg_type(args, 4, &tmp_len);
512 unsigned char hash[32];
515 silc_hmac_free(channel->hmac);
516 if (!silc_hmac_alloc(tmp, NULL, &channel->hmac))
519 /* Set the HMAC key out of current channel key. The client must do
521 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key,
522 channel->key_len / 8,
524 silc_hmac_set_key(channel->hmac, hash,
525 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
526 memset(hash, 0, sizeof(hash));
529 /* Get the passphrase */
530 tmp = silc_argument_get_arg_type(args, 5, &tmp_len);
532 silc_free(channel->passphrase);
533 channel->passphrase = strdup(tmp);
538 case SILC_NOTIFY_TYPE_CUMODE_CHANGE:
541 * Distribute the notify to local clients on the channel
543 SilcChannelClientEntry chl2 = NULL;
544 bool notify_sent = FALSE;
546 SILC_LOG_DEBUG(("CUMODE CHANGE notify"));
549 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
550 packet->dst_id_type);
555 /* Get channel entry */
556 channel = silc_idlist_find_channel_by_id(server->global_list,
559 channel = silc_idlist_find_channel_by_id(server->local_list,
562 silc_free(channel_id);
568 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
570 silc_free(channel_id);
574 SILC_GET32_MSB(mode, tmp);
576 /* Get target client */
577 tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
580 client_id = silc_id_payload_parse_id(tmp, tmp_len);
584 /* Get client entry */
585 client = silc_idlist_find_client_by_id(server->global_list,
586 client_id, TRUE, NULL);
588 client = silc_idlist_find_client_by_id(server->local_list,
589 client_id, TRUE, NULL);
591 silc_free(client_id);
595 silc_free(client_id);
597 /* Get entry to the channel user list */
598 silc_hash_table_list(channel->user_list, &htl);
599 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
600 /* If the mode is channel founder and we already find a client
601 to have that mode on the channel we will enforce the sender
602 to change the channel founder mode away. There can be only one
603 channel founder on the channel. */
604 if (server->server_type == SILC_ROUTER &&
605 mode & SILC_CHANNEL_UMODE_CHANFO &&
606 chl->mode & SILC_CHANNEL_UMODE_CHANFO) {
608 unsigned char cumode[4];
610 if (chl->client == client && chl->mode == mode) {
615 mode &= ~SILC_CHANNEL_UMODE_CHANFO;
616 silc_server_send_notify_cumode(server, sock, FALSE, channel, mode,
617 client->id, SILC_ID_CLIENT,
620 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
621 SILC_PUT32_MSB(mode, cumode);
622 silc_server_send_notify_to_channel(server, sock, channel, FALSE,
623 SILC_NOTIFY_TYPE_CUMODE_CHANGE,
624 3, idp->data, idp->len,
626 idp->data, idp->len);
627 silc_buffer_free(idp);
630 /* Force the mode change if we alredy set the mode */
633 silc_free(channel_id);
634 silc_hash_table_list_reset(&htl);
639 if (chl->client == client) {
640 if (chl->mode == mode) {
645 SILC_LOG_DEBUG(("Changing the channel user mode"));
647 /* Change the mode */
649 if (!(mode & SILC_CHANNEL_UMODE_CHANFO))
655 silc_hash_table_list_reset(&htl);
657 /* Send the same notify to the channel */
659 silc_server_packet_send_to_channel(server, sock, channel,
661 FALSE, packet->buffer->data,
662 packet->buffer->len, FALSE);
664 silc_free(channel_id);
668 case SILC_NOTIFY_TYPE_INVITE:
670 if (packet->dst_id_type == SILC_ID_CLIENT)
673 SILC_LOG_DEBUG(("INVITE notify"));
676 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
679 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
683 /* Get channel entry */
684 channel = silc_idlist_find_channel_by_id(server->global_list,
687 channel = silc_idlist_find_channel_by_id(server->local_list,
690 silc_free(channel_id);
694 silc_free(channel_id);
696 /* Get the added invite */
697 tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
699 if (!channel->invite_list)
700 channel->invite_list = silc_calloc(tmp_len + 2,
701 sizeof(*channel->invite_list));
703 channel->invite_list = silc_realloc(channel->invite_list,
704 sizeof(*channel->invite_list) *
706 strlen(channel->invite_list) +
708 if (tmp[tmp_len - 1] == ',')
709 tmp[tmp_len - 1] = '\0';
711 strncat(channel->invite_list, tmp, tmp_len);
712 strncat(channel->invite_list, ",", 1);
715 /* Get the deleted invite */
716 tmp = silc_argument_get_arg_type(args, 4, &tmp_len);
717 if (tmp && channel->invite_list) {
718 char *start, *end, *n;
720 if (!strncmp(channel->invite_list, tmp,
721 strlen(channel->invite_list) - 1)) {
722 silc_free(channel->invite_list);
723 channel->invite_list = NULL;
725 start = strstr(channel->invite_list, tmp);
726 if (start && strlen(start) >= tmp_len) {
727 end = start + tmp_len;
728 n = silc_calloc(strlen(channel->invite_list) - tmp_len, sizeof(*n));
729 strncat(n, channel->invite_list, start - channel->invite_list);
730 strncat(n, end + 1, ((channel->invite_list +
731 strlen(channel->invite_list)) - end) - 1);
732 silc_free(channel->invite_list);
733 channel->invite_list = n;
740 case SILC_NOTIFY_TYPE_CHANNEL_CHANGE:
742 * Distribute to the local clients on the channel and change the
746 SILC_LOG_DEBUG(("CHANNEL CHANGE"));
748 if (sock->type != SILC_SOCKET_TYPE_ROUTER)
751 /* Get the old Channel ID */
752 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
755 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
759 /* Get the channel entry */
760 channel = silc_idlist_find_channel_by_id(server->local_list,
763 channel = silc_idlist_find_channel_by_id(server->global_list,
766 silc_free(channel_id);
771 /* Send the notify to the channel */
772 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
773 FALSE, packet->buffer->data,
774 packet->buffer->len, FALSE);
776 /* Get the new Channel ID */
777 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
780 channel_id2 = silc_id_payload_parse_id(tmp, tmp_len);
784 SILC_LOG_DEBUG(("Old Channel ID id(%s)",
785 silc_id_render(channel_id, SILC_ID_CHANNEL)));
786 SILC_LOG_DEBUG(("New Channel ID id(%s)",
787 silc_id_render(channel_id2, SILC_ID_CHANNEL)));
789 /* Replace the Channel ID */
790 if (!silc_idlist_replace_channel_id(server->local_list, channel_id,
792 if (!silc_idlist_replace_channel_id(server->global_list, channel_id,
794 silc_free(channel_id2);
799 SilcBuffer users = NULL, users_modes = NULL;
801 /* Re-announce this channel which ID was changed. */
802 silc_server_send_new_channel(server, sock, FALSE, channel->channel_name,
804 silc_id_get_len(channel->id,
808 /* Re-announce our clients on the channel as the ID has changed now */
809 silc_server_announce_get_channel_users(server, channel, &users,
812 silc_buffer_push(users, users->data - users->head);
813 silc_server_packet_send(server, sock,
814 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
815 users->data, users->len, FALSE);
816 silc_buffer_free(users);
819 silc_buffer_push(users_modes, users_modes->data - users_modes->head);
820 silc_server_packet_send_dest(server, sock,
821 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
822 channel->id, SILC_ID_CHANNEL,
824 users_modes->len, FALSE);
825 silc_buffer_free(users_modes);
828 /* Re-announce channel's topic */
829 if (channel->topic) {
830 silc_server_send_notify_topic_set(server, sock,
831 server->server_type == SILC_ROUTER ?
832 TRUE : FALSE, channel,
833 channel->id, SILC_ID_CHANNEL,
838 silc_free(channel_id);
842 case SILC_NOTIFY_TYPE_SERVER_SIGNOFF:
844 * Remove the server entry and all clients that this server owns.
847 SILC_LOG_DEBUG(("SERVER SIGNOFF notify"));
850 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
853 server_id = silc_id_payload_parse_id(tmp, tmp_len);
857 /* Get server entry */
858 server_entry = silc_idlist_find_server_by_id(server->global_list,
859 server_id, TRUE, NULL);
862 server_entry = silc_idlist_find_server_by_id(server->local_list,
863 server_id, TRUE, NULL);
866 /* If we are normal server then we might not have the server. Check
867 whether router was kind enough to send the list of all clients
868 that actually was to be removed. Remove them if the list is
870 if (server->server_type != SILC_ROUTER &&
871 silc_argument_get_arg_num(args) > 1) {
874 for (i = 1; i < silc_argument_get_arg_num(args); i++) {
876 tmp = silc_argument_get_arg_type(args, i + 1, &tmp_len);
879 client_id = silc_id_payload_parse_id(tmp, tmp_len);
883 /* Get client entry */
884 client = silc_idlist_find_client_by_id(server->global_list,
885 client_id, TRUE, &cache);
888 client = silc_idlist_find_client_by_id(server->local_list,
889 client_id, TRUE, &cache);
892 silc_free(client_id);
896 silc_free(client_id);
898 /* Update statistics */
899 server->stat.clients--;
900 if (server->server_type == SILC_ROUTER)
901 server->stat.cell_clients--;
902 SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
903 SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
905 /* Remove the client from all channels. */
906 silc_server_remove_from_channels(server, NULL, client,
909 /* Remove the client */
910 silc_idlist_del_client(local ? server->local_list :
911 server->global_list, client);
915 silc_free(server_id);
919 silc_free(server_id);
921 /* Free all client entries that this server owns as they will
922 become invalid now as well. */
923 silc_server_remove_clients_by_server(server, server_entry, TRUE);
925 /* Remove the server entry */
926 silc_idlist_del_server(local ? server->local_list :
927 server->global_list, server_entry);
929 /* XXX update statistics */
933 case SILC_NOTIFY_TYPE_KICKED:
935 * Distribute the notify to local clients on the channel
938 SILC_LOG_DEBUG(("KICKED notify"));
941 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
942 packet->dst_id_type);
947 /* Get channel entry */
948 channel = silc_idlist_find_channel_by_id(server->global_list,
951 channel = silc_idlist_find_channel_by_id(server->local_list,
954 silc_free(channel_id);
958 silc_free(channel_id);
961 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
964 client_id = silc_id_payload_parse_id(tmp, tmp_len);
968 /* If the the client is not in local list we check global list */
969 client = silc_idlist_find_client_by_id(server->global_list,
970 client_id, TRUE, NULL);
972 client = silc_idlist_find_client_by_id(server->local_list,
973 client_id, TRUE, NULL);
975 silc_free(client_id);
980 /* Send to channel */
981 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
982 FALSE, packet->buffer->data,
983 packet->buffer->len, FALSE);
985 /* Remove the client from channel */
986 silc_server_remove_from_one_channel(server, sock, channel, client, FALSE);
990 case SILC_NOTIFY_TYPE_KILLED:
993 * Distribute the notify to local clients on channels
998 SILC_LOG_DEBUG(("KILLED notify"));
1001 id = silc_argument_get_arg_type(args, 1, &id_len);
1004 client_id = silc_id_payload_parse_id(id, id_len);
1008 /* If the the client is not in local list we check global list */
1009 client = silc_idlist_find_client_by_id(server->global_list,
1010 client_id, TRUE, NULL);
1012 client = silc_idlist_find_client_by_id(server->local_list,
1013 client_id, TRUE, NULL);
1015 silc_free(client_id);
1019 silc_free(client_id);
1021 /* If the client is one of ours, then close the connection to the
1022 client now. This removes the client from all channels as well. */
1023 if (packet->dst_id_type == SILC_ID_CLIENT && client->connection) {
1024 sock = client->connection;
1025 silc_server_free_client_data(server, NULL, client, FALSE, NULL);
1026 silc_server_close_connection(server, sock);
1031 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1035 /* Send the notify to local clients on the channels except to the
1036 client who is killed. */
1037 silc_server_send_notify_on_channels(server, client, client,
1038 SILC_NOTIFY_TYPE_KILLED,
1043 /* Remove the client from all channels */
1044 silc_server_remove_from_channels(server, NULL, client, FALSE, NULL,
1050 case SILC_NOTIFY_TYPE_UMODE_CHANGE:
1052 * Save the mode of the client.
1055 SILC_LOG_DEBUG(("UMODE_CHANGE notify"));
1058 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1061 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1065 /* Get client entry */
1066 client = silc_idlist_find_client_by_id(server->global_list,
1067 client_id, TRUE, NULL);
1069 client = silc_idlist_find_client_by_id(server->local_list,
1070 client_id, TRUE, NULL);
1072 silc_free(client_id);
1076 silc_free(client_id);
1079 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1082 SILC_GET32_MSB(mode, tmp);
1084 #define SILC_UMODE_STATS_UPDATE(oper, mod) \
1086 if (client->mode & (mod)) { \
1087 if (!(mode & (mod))) { \
1088 if (client->connection) \
1089 server->stat.my_ ## oper ## _ops--; \
1090 if (server->server_type == SILC_ROUTER) \
1091 server->stat. oper ## _ops--; \
1094 if (mode & (mod)) { \
1095 if (client->connection) \
1096 server->stat.my_ ## oper ## _ops++; \
1097 if (server->server_type == SILC_ROUTER) \
1098 server->stat. oper ## _ops++; \
1103 /* Update statistics */
1104 SILC_UMODE_STATS_UPDATE(server, SILC_UMODE_SERVER_OPERATOR);
1105 SILC_UMODE_STATS_UPDATE(router, SILC_UMODE_ROUTER_OPERATOR);
1108 client->mode = mode;
1112 case SILC_NOTIFY_TYPE_BAN:
1117 SILC_LOG_DEBUG(("BAN notify"));
1119 /* Get Channel ID */
1120 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1123 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
1127 /* Get channel entry */
1128 channel = silc_idlist_find_channel_by_id(server->global_list,
1131 channel = silc_idlist_find_channel_by_id(server->local_list,
1134 silc_free(channel_id);
1138 silc_free(channel_id);
1140 /* Get the new ban and add it to the ban list */
1141 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1143 if (!channel->ban_list)
1144 channel->ban_list = silc_calloc(tmp_len + 2,
1145 sizeof(*channel->ban_list));
1147 channel->ban_list = silc_realloc(channel->ban_list,
1148 sizeof(*channel->ban_list) *
1150 strlen(channel->ban_list) + 2));
1151 strncat(channel->ban_list, tmp, tmp_len);
1152 strncat(channel->ban_list, ",", 1);
1155 /* Get the ban to be removed and remove it from the list */
1156 tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
1157 if (tmp && channel->ban_list) {
1158 char *start, *end, *n;
1160 if (!strncmp(channel->ban_list, tmp, strlen(channel->ban_list) - 1)) {
1161 silc_free(channel->ban_list);
1162 channel->ban_list = NULL;
1164 start = strstr(channel->ban_list, tmp);
1165 if (start && strlen(start) >= tmp_len) {
1166 end = start + tmp_len;
1167 n = silc_calloc(strlen(channel->ban_list) - tmp_len, sizeof(*n));
1168 strncat(n, channel->ban_list, start - channel->ban_list);
1169 strncat(n, end + 1, ((channel->ban_list +
1170 strlen(channel->ban_list)) - end) - 1);
1171 silc_free(channel->ban_list);
1172 channel->ban_list = n;
1178 /* Ignore rest of the notify types for now */
1179 case SILC_NOTIFY_TYPE_NONE:
1180 case SILC_NOTIFY_TYPE_MOTD:
1187 silc_notify_payload_free(payload);
1190 void silc_server_notify_list(SilcServer server,
1191 SilcSocketConnection sock,
1192 SilcPacketContext *packet)
1194 SilcPacketContext *new;
1198 SILC_LOG_DEBUG(("Processing Notify List"));
1200 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
1201 packet->src_id_type != SILC_ID_SERVER)
1204 /* Make copy of the original packet context, except for the actual
1205 data buffer, which we will here now fetch from the original buffer. */
1206 new = silc_packet_context_alloc();
1207 new->type = SILC_PACKET_NOTIFY;
1208 new->flags = packet->flags;
1209 new->src_id = packet->src_id;
1210 new->src_id_len = packet->src_id_len;
1211 new->src_id_type = packet->src_id_type;
1212 new->dst_id = packet->dst_id;
1213 new->dst_id_len = packet->dst_id_len;
1214 new->dst_id_type = packet->dst_id_type;
1216 buffer = silc_buffer_alloc(1024);
1217 new->buffer = buffer;
1219 while (packet->buffer->len) {
1220 SILC_GET16_MSB(len, packet->buffer->data + 2);
1221 if (len > packet->buffer->len)
1224 if (len > buffer->truelen) {
1225 silc_buffer_free(buffer);
1226 buffer = silc_buffer_alloc(1024 + len);
1229 silc_buffer_pull_tail(buffer, len);
1230 silc_buffer_put(buffer, packet->buffer->data, len);
1232 /* Process the Notify */
1233 silc_server_notify(server, sock, new);
1235 silc_buffer_push_tail(buffer, len);
1236 silc_buffer_pull(packet->buffer, len);
1239 silc_buffer_free(buffer);
1243 /* Received private message. This resolves the destination of the message
1244 and sends the packet. This is used by both server and router. If the
1245 destination is our locally connected client this sends the packet to
1246 the client. This may also send the message for further routing if
1247 the destination is not in our server (or router). */
1249 void silc_server_private_message(SilcServer server,
1250 SilcSocketConnection sock,
1251 SilcPacketContext *packet)
1253 SilcSocketConnection dst_sock;
1254 SilcIDListData idata;
1256 SILC_LOG_DEBUG(("Start"));
1258 if (packet->src_id_type != SILC_ID_CLIENT ||
1259 packet->dst_id_type != SILC_ID_CLIENT || !packet->dst_id)
1262 /* Get the route to the client */
1263 dst_sock = silc_server_get_client_route(server, packet->dst_id,
1264 packet->dst_id_len, NULL, &idata);
1266 /* Send IDENTIFY command reply with error status to indicate that
1267 such destination ID does not exist or is invalid */
1268 SilcBuffer idp = silc_id_payload_encode_data(packet->dst_id,
1270 packet->dst_id_type);
1274 if (packet->src_id_type == SILC_ID_CLIENT) {
1275 SilcClientID *client_id = silc_id_str2id(packet->src_id,
1277 packet->src_id_type);
1278 silc_server_send_dest_command_reply(server, sock,
1279 client_id, SILC_ID_CLIENT,
1280 SILC_COMMAND_IDENTIFY,
1281 SILC_STATUS_ERR_NO_SUCH_CLIENT_ID,
1282 0, 1, 2, idp->data, idp->len);
1283 silc_free(client_id);
1285 silc_server_send_command_reply(server, sock, SILC_COMMAND_IDENTIFY,
1286 SILC_STATUS_ERR_NO_SUCH_CLIENT_ID,
1287 0, 1, 2, idp->data, idp->len);
1290 silc_buffer_free(idp);
1294 /* Send the private message */
1295 silc_server_send_private_message(server, dst_sock, idata->send_key,
1296 idata->hmac_send, idata->psn_send++,
1300 /* Received private message key packet.. This packet is never for us. It is to
1301 the client in the packet's destination ID. Sending of this sort of packet
1302 equals sending private message, ie. it is sent point to point from
1303 one client to another. */
1305 void silc_server_private_message_key(SilcServer server,
1306 SilcSocketConnection sock,
1307 SilcPacketContext *packet)
1309 SilcSocketConnection dst_sock;
1310 SilcIDListData idata;
1312 SILC_LOG_DEBUG(("Start"));
1314 if (packet->src_id_type != SILC_ID_CLIENT ||
1315 packet->dst_id_type != SILC_ID_CLIENT)
1318 if (!packet->dst_id)
1321 /* Get the route to the client */
1322 dst_sock = silc_server_get_client_route(server, packet->dst_id,
1323 packet->dst_id_len, NULL, &idata);
1327 /* Relay the packet */
1328 silc_server_relay_packet(server, dst_sock, idata->send_key,
1329 idata->hmac_send, idata->psn_send++, packet, FALSE);
1332 /* Processes incoming command reply packet. The command reply packet may
1333 be destined to one of our clients or it may directly for us. We will
1334 call the command reply routine after processing the packet. */
1336 void silc_server_command_reply(SilcServer server,
1337 SilcSocketConnection sock,
1338 SilcPacketContext *packet)
1340 SilcBuffer buffer = packet->buffer;
1341 SilcClientEntry client = NULL;
1342 SilcSocketConnection dst_sock;
1343 SilcIDListData idata;
1344 SilcClientID *id = NULL;
1346 SILC_LOG_DEBUG(("Start"));
1348 /* Source must be server or router */
1349 if (packet->src_id_type != SILC_ID_SERVER &&
1350 sock->type != SILC_SOCKET_TYPE_ROUTER)
1353 if (packet->dst_id_type == SILC_ID_CHANNEL)
1356 if (packet->dst_id_type == SILC_ID_CLIENT) {
1357 /* Destination must be one of ours */
1358 id = silc_id_str2id(packet->dst_id, packet->dst_id_len, SILC_ID_CLIENT);
1361 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
1363 SILC_LOG_ERROR(("Cannot process command reply to unknown client"));
1369 if (packet->dst_id_type == SILC_ID_SERVER) {
1370 /* For now this must be for us */
1371 if (memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1372 SILC_LOG_ERROR(("Cannot process command reply to unknown server"));
1377 /* Execute command reply locally for the command */
1378 silc_server_command_reply_process(server, sock, buffer);
1380 if (packet->dst_id_type == SILC_ID_CLIENT && client && id) {
1381 /* Relay the packet to the client */
1383 dst_sock = (SilcSocketConnection)client->connection;
1384 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1385 + packet->dst_id_len + packet->padlen);
1387 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
1388 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
1390 idata = (SilcIDListData)client;
1392 /* Encrypt packet */
1393 silc_packet_encrypt(idata->send_key, idata->hmac_send, idata->psn_send++,
1394 dst_sock->outbuf, buffer->len);
1396 /* Send the packet */
1397 silc_server_packet_send_real(server, dst_sock, TRUE);
1403 /* Process received channel message. The message can be originated from
1404 client or server. */
1406 void silc_server_channel_message(SilcServer server,
1407 SilcSocketConnection sock,
1408 SilcPacketContext *packet)
1410 SilcChannelEntry channel = NULL;
1411 SilcChannelID *id = NULL;
1412 void *sender = NULL;
1413 void *sender_entry = NULL;
1416 SILC_LOG_DEBUG(("Processing channel message"));
1419 if (packet->dst_id_type != SILC_ID_CHANNEL) {
1420 SILC_LOG_DEBUG(("Received bad message for channel, dropped"));
1424 /* Find channel entry */
1425 id = silc_id_str2id(packet->dst_id, packet->dst_id_len, SILC_ID_CHANNEL);
1428 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
1430 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
1432 SILC_LOG_DEBUG(("Could not find channel"));
1437 /* See that this client is on the channel. If the original sender is
1438 not client (as it can be server as well) we don't do the check. */
1439 sender = silc_id_str2id(packet->src_id, packet->src_id_len,
1440 packet->src_id_type);
1443 if (packet->src_id_type == SILC_ID_CLIENT) {
1444 sender_entry = silc_idlist_find_client_by_id(server->local_list,
1445 sender, TRUE, NULL);
1446 if (!sender_entry) {
1448 sender_entry = silc_idlist_find_client_by_id(server->global_list,
1449 sender, TRUE, NULL);
1451 if (!sender_entry || !silc_server_client_on_channel(sender_entry,
1453 SILC_LOG_DEBUG(("Client not on channel"));
1457 /* If the packet is coming from router, but the client entry is
1458 local entry to us then some router is rerouting this to us and it is
1460 if (server->server_type == SILC_ROUTER &&
1461 sock->type == SILC_SOCKET_TYPE_ROUTER && local) {
1462 SILC_LOG_DEBUG(("Channel message rerouted to the sender, drop it"));
1467 /* Distribute the packet to our local clients. This will send the
1468 packet for further routing as well, if needed. */
1469 silc_server_packet_relay_to_channel(server, sock, channel, sender,
1470 packet->src_id_type, sender_entry,
1471 packet->buffer->data,
1472 packet->buffer->len, FALSE);
1481 /* Received channel key packet. We distribute the key to all of our locally
1482 connected clients on the channel. */
1484 void silc_server_channel_key(SilcServer server,
1485 SilcSocketConnection sock,
1486 SilcPacketContext *packet)
1488 SilcBuffer buffer = packet->buffer;
1489 SilcChannelEntry channel;
1491 if (packet->src_id_type != SILC_ID_SERVER ||
1492 (server->server_type == SILC_ROUTER &&
1493 sock->type == SILC_SOCKET_TYPE_ROUTER))
1496 /* Save the channel key */
1497 channel = silc_server_save_channel_key(server, buffer, NULL);
1501 /* Distribute the key to everybody who is on the channel. If we are router
1502 we will also send it to locally connected servers. */
1503 silc_server_send_channel_key(server, sock, channel, FALSE);
1505 if (server->server_type != SILC_BACKUP_ROUTER) {
1506 /* Distribute to local cell backup routers. */
1507 silc_server_backup_send(server, (SilcServerEntry)sock->user_data,
1508 SILC_PACKET_CHANNEL_KEY, 0,
1509 buffer->data, buffer->len, FALSE, TRUE);
1513 /* Received New Client packet and processes it. Creates Client ID for the
1514 client. Client becomes registered after calling this functions. */
1516 SilcClientEntry silc_server_new_client(SilcServer server,
1517 SilcSocketConnection sock,
1518 SilcPacketContext *packet)
1520 SilcBuffer buffer = packet->buffer;
1521 SilcClientEntry client;
1522 SilcClientID *client_id;
1524 SilcIDListData idata;
1525 char *username = NULL, *realname = NULL, *id_string;
1526 uint16 username_len;
1529 char *hostname, *nickname;
1532 SILC_LOG_DEBUG(("Creating new client"));
1534 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
1537 /* Take client entry */
1538 client = (SilcClientEntry)sock->user_data;
1539 idata = (SilcIDListData)client;
1541 /* Remove the old cache entry. */
1542 if (!silc_idcache_del_by_context(server->local_list->clients, client)) {
1543 SILC_LOG_ERROR(("Lost client's cache entry - bad thing"));
1544 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1549 /* Parse incoming packet */
1550 ret = silc_buffer_unformat(buffer,
1551 SILC_STR_UI16_NSTRING_ALLOC(&username,
1553 SILC_STR_UI16_STRING_ALLOC(&realname),
1556 silc_free(username);
1557 silc_free(realname);
1558 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1559 "Incomplete client information");
1564 silc_free(username);
1565 silc_free(realname);
1566 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1567 "Incomplete client information");
1571 if (username_len > 128)
1572 username[128] = '\0';
1574 /* Check for bad characters for nickname, and modify the nickname if
1575 it includes those. */
1576 if (silc_server_name_bad_chars(username, username_len)) {
1577 nickname = silc_server_name_modify_bad(username, username_len);
1579 nickname = strdup(username);
1582 /* Make sanity checks for the hostname of the client. If the hostname
1583 is provided in the `username' check that it is the same than the
1584 resolved hostname, or if not resolved the hostname that appears in
1585 the client's public key. If the hostname is not present then put
1586 it from the resolved name or from the public key. */
1587 if (strchr(username, '@')) {
1588 SilcPublicKeyIdentifier pident;
1589 int tlen = strcspn(username, "@");
1590 char *phostname = NULL;
1592 hostname = silc_calloc((strlen(username) - tlen) + 1, sizeof(char));
1593 memcpy(hostname, username + tlen + 1, strlen(username) - tlen - 1);
1595 if (strcmp(sock->hostname, sock->ip) &&
1596 strcmp(sock->hostname, hostname)) {
1597 silc_free(username);
1598 silc_free(hostname);
1599 silc_free(realname);
1600 silc_server_disconnect_remote(server, sock,
1601 "Server closed connection: "
1602 "Incomplete client information");
1606 pident = silc_pkcs_decode_identifier(client->data.public_key->identifier);
1608 phostname = strdup(pident->host);
1609 silc_pkcs_free_identifier(pident);
1612 if (!strcmp(sock->hostname, sock->ip) &&
1613 phostname && strcmp(phostname, hostname)) {
1614 silc_free(username);
1615 silc_free(hostname);
1616 silc_free(phostname);
1617 silc_free(realname);
1618 silc_server_disconnect_remote(server, sock,
1619 "Server closed connection: "
1620 "Incomplete client information");
1624 silc_free(phostname);
1626 /* The hostname is not present, add it. */
1628 /* XXX For now we cannot take the host name from the public key since
1629 they are not trusted or we cannot verify them as trusted. Just take
1630 what the resolved name or address is. */
1632 if (strcmp(sock->hostname, sock->ip)) {
1634 newusername = silc_calloc(strlen(username) +
1635 strlen(sock->hostname) + 2,
1636 sizeof(*newusername));
1637 strncat(newusername, username, strlen(username));
1638 strncat(newusername, "@", 1);
1639 strncat(newusername, sock->hostname, strlen(sock->hostname));
1640 silc_free(username);
1641 username = newusername;
1644 SilcPublicKeyIdentifier pident =
1645 silc_pkcs_decode_identifier(client->data.public_key->identifier);
1648 newusername = silc_calloc(strlen(username) +
1649 strlen(pident->host) + 2,
1650 sizeof(*newusername));
1651 strncat(newusername, username, strlen(username));
1652 strncat(newusername, "@", 1);
1653 strncat(newusername, pident->host, strlen(pident->host));
1654 silc_free(username);
1655 username = newusername;
1656 silc_pkcs_free_identifier(pident);
1662 /* Create Client ID */
1663 while (!silc_id_create_client_id(server, server->id, server->rng,
1664 server->md5hash, nickname, &client_id)) {
1666 snprintf(&nickname[strlen(nickname) - 1], 1, "%d", nickfail);
1669 /* Update client entry */
1670 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
1671 client->nickname = nickname;
1672 client->username = username;
1673 client->userinfo = realname ? realname : strdup(" ");
1674 client->id = client_id;
1675 id_len = silc_id_get_len(client_id, SILC_ID_CLIENT);
1677 /* Add the client again to the ID cache */
1678 silc_idcache_add(server->local_list->clients, client->nickname,
1679 client_id, client, 0, NULL);
1681 /* Notify our router about new client on the SILC network */
1682 if (!server->standalone)
1683 silc_server_send_new_id(server, (SilcSocketConnection)
1684 server->router->connection,
1685 server->server_type == SILC_ROUTER ? TRUE : FALSE,
1686 client->id, SILC_ID_CLIENT, id_len);
1688 /* Send the new client ID to the client. */
1689 id_string = silc_id_id2str(client->id, SILC_ID_CLIENT);
1690 reply = silc_buffer_alloc(2 + 2 + id_len);
1691 silc_buffer_pull_tail(reply, SILC_BUFFER_END(reply));
1692 silc_buffer_format(reply,
1693 SILC_STR_UI_SHORT(SILC_ID_CLIENT),
1694 SILC_STR_UI_SHORT(id_len),
1695 SILC_STR_UI_XNSTRING(id_string, id_len),
1697 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID, 0,
1698 reply->data, reply->len, FALSE);
1699 silc_free(id_string);
1700 silc_buffer_free(reply);
1702 /* Send some nice info to the client */
1703 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1704 ("Welcome to the SILC Network %s",
1706 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1707 ("Your host is %s, running version %s",
1708 server->config->server_info->server_name,
1710 if (server->server_type == SILC_ROUTER) {
1711 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1712 ("There are %d clients on %d servers in SILC "
1713 "Network", server->stat.clients,
1714 server->stat.servers + 1));
1715 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1716 ("There are %d clients on %d server in our cell",
1717 server->stat.cell_clients,
1718 server->stat.cell_servers + 1));
1719 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1720 ("I have %d clients, %d channels, %d servers and "
1722 server->stat.my_clients,
1723 server->stat.my_channels,
1724 server->stat.my_servers,
1725 server->stat.my_routers));
1726 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1727 ("There are %d server operators and %d router "
1729 server->stat.server_ops,
1730 server->stat.router_ops));
1731 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1732 ("I have %d operators online",
1733 server->stat.my_router_ops +
1734 server->stat.my_server_ops));
1736 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1737 ("I have %d clients and %d channels formed",
1738 server->stat.my_clients,
1739 server->stat.my_channels));
1740 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1741 ("%d operators online",
1742 server->stat.my_server_ops));
1744 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1745 ("Your connection is secured with %s cipher, "
1746 "key length %d bits",
1747 idata->send_key->cipher->name,
1748 idata->send_key->cipher->key_len));
1749 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1750 ("Your current nickname is %s",
1754 silc_server_send_motd(server, sock);
1759 /* Create new server. This processes received New Server packet and
1760 saves the received Server ID. The server is our locally connected
1761 server thus we save all the information and save it to local list.
1762 This funtion can be used by both normal server and router server.
1763 If normal server uses this it means that its router has connected
1764 to the server. If router uses this it means that one of the cell's
1765 servers is connected to the router. */
1767 SilcServerEntry silc_server_new_server(SilcServer server,
1768 SilcSocketConnection sock,
1769 SilcPacketContext *packet)
1771 SilcBuffer buffer = packet->buffer;
1772 SilcServerEntry new_server, server_entry;
1773 SilcServerID *server_id;
1774 SilcIDListData idata;
1775 unsigned char *server_name, *id_string;
1776 uint16 id_len, name_len;
1780 SILC_LOG_DEBUG(("Creating new server"));
1782 if (sock->type != SILC_SOCKET_TYPE_SERVER &&
1783 sock->type != SILC_SOCKET_TYPE_ROUTER)
1786 /* Take server entry */
1787 new_server = (SilcServerEntry)sock->user_data;
1788 idata = (SilcIDListData)new_server;
1790 /* Remove the old cache entry */
1791 if (!silc_idcache_del_by_context(server->local_list->servers, new_server)) {
1792 silc_idcache_del_by_context(server->global_list->servers, new_server);
1796 /* Parse the incoming packet */
1797 ret = silc_buffer_unformat(buffer,
1798 SILC_STR_UI16_NSTRING_ALLOC(&id_string, &id_len),
1799 SILC_STR_UI16_NSTRING_ALLOC(&server_name,
1804 silc_free(id_string);
1806 silc_free(server_name);
1810 if (id_len > buffer->len) {
1811 silc_free(id_string);
1812 silc_free(server_name);
1817 server_name[255] = '\0';
1820 server_id = silc_id_str2id(id_string, id_len, SILC_ID_SERVER);
1822 silc_free(id_string);
1823 silc_free(server_name);
1826 silc_free(id_string);
1828 /* Check that we do not have this ID already */
1829 server_entry = silc_idlist_find_server_by_id(server->local_list,
1830 server_id, TRUE, NULL);
1832 silc_idcache_del_by_context(server->local_list->servers, server_entry);
1834 server_entry = silc_idlist_find_server_by_id(server->global_list,
1835 server_id, TRUE, NULL);
1837 silc_idcache_del_by_context(server->global_list->servers, server_entry);
1840 /* Update server entry */
1841 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
1842 new_server->server_name = server_name;
1843 new_server->id = server_id;
1845 SILC_LOG_DEBUG(("New server id(%s)",
1846 silc_id_render(server_id, SILC_ID_SERVER)));
1848 /* Add again the entry to the ID cache. */
1849 silc_idcache_add(local ? server->local_list->servers :
1850 server->global_list->servers, server_name, server_id,
1851 new_server, 0, NULL);
1853 /* Distribute the information about new server in the SILC network
1854 to our router. If we are normal server we won't send anything
1855 since this connection must be our router connection. */
1856 if (server->server_type == SILC_ROUTER && !server->standalone &&
1857 server->router->connection != sock)
1858 silc_server_send_new_id(server, server->router->connection,
1859 TRUE, new_server->id, SILC_ID_SERVER,
1860 silc_id_get_len(server_id, SILC_ID_SERVER));
1862 if (server->server_type == SILC_ROUTER)
1863 server->stat.cell_servers++;
1865 /* Check whether this router connection has been replaced by an
1866 backup router. If it has been then we'll disable the server and will
1867 ignore everything it will send until the backup router resuming
1868 protocol has been completed. */
1869 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1870 silc_server_backup_replaced_get(server, server_id, NULL)) {
1871 /* Send packet to the server indicating that it cannot use this
1872 connection as it has been replaced by backup router. */
1873 SilcBuffer packet = silc_buffer_alloc(2);
1874 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1875 silc_buffer_format(packet,
1876 SILC_STR_UI_CHAR(SILC_SERVER_BACKUP_REPLACED),
1877 SILC_STR_UI_CHAR(0),
1879 silc_server_packet_send(server, sock,
1880 SILC_PACKET_RESUME_ROUTER, 0,
1881 packet->data, packet->len, TRUE);
1882 silc_buffer_free(packet);
1884 /* Mark the router disabled. The data sent earlier will go but nothing
1885 after this does not go to this connection. */
1886 idata->status |= SILC_IDLIST_STATUS_DISABLED;
1888 /* If it is router announce our stuff to it. */
1889 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1890 server->server_type == SILC_ROUTER) {
1891 silc_server_announce_servers(server, FALSE, 0, sock);
1892 silc_server_announce_clients(server, 0, sock);
1893 silc_server_announce_channels(server, 0, sock);
1900 /* Processes incoming New ID packet. New ID Payload is used to distribute
1901 information about newly registered clients and servers. */
1903 static void silc_server_new_id_real(SilcServer server,
1904 SilcSocketConnection sock,
1905 SilcPacketContext *packet,
1908 SilcBuffer buffer = packet->buffer;
1910 SilcServerEntry router, server_entry;
1911 SilcSocketConnection router_sock;
1916 SILC_LOG_DEBUG(("Processing new ID"));
1918 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
1919 server->server_type == SILC_SERVER ||
1920 packet->src_id_type != SILC_ID_SERVER)
1923 idp = silc_id_payload_parse(buffer->data, buffer->len);
1927 id_type = silc_id_payload_get_type(idp);
1929 /* Normal server cannot have other normal server connections */
1930 server_entry = (SilcServerEntry)sock->user_data;
1931 if (id_type == SILC_ID_SERVER && sock->type == SILC_SOCKET_TYPE_SERVER &&
1932 server_entry->server_type == SILC_SERVER)
1935 id = silc_id_payload_get_id(idp);
1939 /* If the packet is coming from server then use the sender as the
1940 origin of the the packet. If it came from router then check the real
1941 sender of the packet and use that as the origin. */
1942 if (sock->type == SILC_SOCKET_TYPE_SERVER) {
1943 id_list = server->local_list;
1945 router = sock->user_data;
1947 /* If the sender is backup router and ID is server (and we are not
1948 backup router) then switch the entry to global list. */
1949 if (server_entry->server_type == SILC_BACKUP_ROUTER &&
1950 id_type == SILC_ID_SERVER &&
1951 server->id_entry->server_type != SILC_BACKUP_ROUTER) {
1952 id_list = server->global_list;
1953 router_sock = server->router ? server->router->connection : sock;
1956 void *sender_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1957 packet->src_id_type);
1958 router = silc_idlist_find_server_by_id(server->global_list,
1959 sender_id, TRUE, NULL);
1961 router = silc_idlist_find_server_by_id(server->local_list,
1962 sender_id, TRUE, NULL);
1963 silc_free(sender_id);
1965 id_list = server->global_list;
1972 case SILC_ID_CLIENT:
1974 SilcClientEntry entry;
1976 /* Check that we do not have this client already */
1977 entry = silc_idlist_find_client_by_id(server->global_list,
1978 id, server->server_type,
1981 entry = silc_idlist_find_client_by_id(server->local_list,
1982 id, server->server_type,
1985 SILC_LOG_DEBUG(("Ignoring client that we already have"));
1989 SILC_LOG_DEBUG(("New client id(%s) from [%s] %s",
1990 silc_id_render(id, SILC_ID_CLIENT),
1991 sock->type == SILC_SOCKET_TYPE_SERVER ?
1992 "Server" : "Router", sock->hostname));
1994 /* As a router we keep information of all global information in our
1995 global list. Cell wide information however is kept in the local
1997 entry = silc_idlist_add_client(id_list, NULL, NULL, NULL,
1998 id, router, NULL, 0);
2000 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
2002 /* Inform the sender that the ID is not usable */
2003 silc_server_send_notify_signoff(server, sock, FALSE, id, NULL);
2006 entry->nickname = NULL;
2007 entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
2009 if (sock->type == SILC_SOCKET_TYPE_SERVER)
2010 server->stat.cell_clients++;
2011 server->stat.clients++;
2015 case SILC_ID_SERVER:
2017 SilcServerEntry entry;
2019 /* If the ID is mine, ignore it. */
2020 if (SILC_ID_SERVER_COMPARE(id, server->id)) {
2021 SILC_LOG_DEBUG(("Ignoring my own ID as new ID"));
2025 /* If the ID is the sender's ID, ignore it (we have it already) */
2026 if (SILC_ID_SERVER_COMPARE(id, router->id)) {
2027 SILC_LOG_DEBUG(("Ignoring sender's own ID"));
2031 /* Check that we do not have this server already */
2032 entry = silc_idlist_find_server_by_id(server->global_list,
2033 id, server->server_type,
2036 entry = silc_idlist_find_server_by_id(server->local_list,
2037 id, server->server_type,
2040 SILC_LOG_DEBUG(("Ignoring server that we already have"));
2044 SILC_LOG_DEBUG(("New server id(%s) from [%s] %s",
2045 silc_id_render(id, SILC_ID_SERVER),
2046 sock->type == SILC_SOCKET_TYPE_SERVER ?
2047 "Server" : "Router", sock->hostname));
2049 /* As a router we keep information of all global information in our
2050 global list. Cell wide information however is kept in the local
2052 entry = silc_idlist_add_server(id_list, NULL, 0, id, router,
2055 SILC_LOG_ERROR(("Could not add new server to the ID Cache"));
2058 entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
2060 if (sock->type == SILC_SOCKET_TYPE_SERVER)
2061 server->stat.cell_servers++;
2062 server->stat.servers++;
2066 case SILC_ID_CHANNEL:
2067 SILC_LOG_ERROR(("Channel cannot be registered with NEW_ID packet"));
2076 /* If the sender of this packet is server and we are router we need to
2077 broadcast this packet to other routers in the network. */
2078 if (broadcast && !server->standalone && server->server_type == SILC_ROUTER &&
2079 sock->type == SILC_SOCKET_TYPE_SERVER &&
2080 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
2081 SILC_LOG_DEBUG(("Broadcasting received New ID packet"));
2082 silc_server_packet_send(server, server->router->connection,
2084 packet->flags | SILC_PACKET_FLAG_BROADCAST,
2085 buffer->data, buffer->len, FALSE);
2086 silc_server_backup_send(server, (SilcServerEntry)sock->user_data,
2087 packet->type, packet->flags,
2088 packet->buffer->data, packet->buffer->len,
2093 silc_id_payload_free(idp);
2097 /* Processes incoming New ID packet. New ID Payload is used to distribute
2098 information about newly registered clients and servers. */
2100 void silc_server_new_id(SilcServer server, SilcSocketConnection sock,
2101 SilcPacketContext *packet)
2103 silc_server_new_id_real(server, sock, packet, TRUE);
2106 /* Receoved New Id List packet, list of New ID payloads inside one
2107 packet. Process the New ID payloads one by one. */
2109 void silc_server_new_id_list(SilcServer server, SilcSocketConnection sock,
2110 SilcPacketContext *packet)
2112 SilcPacketContext *new_id;
2116 SILC_LOG_DEBUG(("Processing New ID List"));
2118 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
2119 packet->src_id_type != SILC_ID_SERVER)
2122 /* If the sender of this packet is server and we are router we need to
2123 broadcast this packet to other routers in the network. Broadcast
2124 this list packet instead of multiple New ID packets. */
2125 if (!server->standalone && server->server_type == SILC_ROUTER &&
2126 sock->type == SILC_SOCKET_TYPE_SERVER &&
2127 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
2128 SILC_LOG_DEBUG(("Broadcasting received New ID List packet"));
2129 silc_server_packet_send(server, server->router->connection,
2131 packet->flags | SILC_PACKET_FLAG_BROADCAST,
2132 packet->buffer->data, packet->buffer->len, FALSE);
2133 silc_server_backup_send(server, (SilcServerEntry)sock->user_data,
2134 packet->type, packet->flags,
2135 packet->buffer->data, packet->buffer->len,
2139 /* Make copy of the original packet context, except for the actual
2140 data buffer, which we will here now fetch from the original buffer. */
2141 new_id = silc_packet_context_alloc();
2142 new_id->type = SILC_PACKET_NEW_ID;
2143 new_id->flags = packet->flags;
2144 new_id->src_id = packet->src_id;
2145 new_id->src_id_len = packet->src_id_len;
2146 new_id->src_id_type = packet->src_id_type;
2147 new_id->dst_id = packet->dst_id;
2148 new_id->dst_id_len = packet->dst_id_len;
2149 new_id->dst_id_type = packet->dst_id_type;
2151 idp = silc_buffer_alloc(256);
2152 new_id->buffer = idp;
2154 while (packet->buffer->len) {
2155 SILC_GET16_MSB(id_len, packet->buffer->data + 2);
2156 if ((id_len > packet->buffer->len) ||
2157 (id_len > idp->truelen))
2160 silc_buffer_pull_tail(idp, 4 + id_len);
2161 silc_buffer_put(idp, packet->buffer->data, 4 + id_len);
2163 /* Process the New ID */
2164 silc_server_new_id_real(server, sock, new_id, FALSE);
2166 silc_buffer_push_tail(idp, 4 + id_len);
2167 silc_buffer_pull(packet->buffer, 4 + id_len);
2170 silc_buffer_free(idp);
2174 /* Received New Channel packet. Information about new channels in the
2175 network are distributed using this packet. Save the information about
2176 the new channel. This usually comes from router but also normal server
2177 can send this to notify channels it has when it connects to us. */
2179 void silc_server_new_channel(SilcServer server,
2180 SilcSocketConnection sock,
2181 SilcPacketContext *packet)
2183 SilcChannelPayload payload;
2184 SilcChannelID *channel_id;
2190 SilcServerEntry server_entry;
2191 SilcChannelEntry channel;
2193 SILC_LOG_DEBUG(("Processing New Channel"));
2195 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
2196 packet->src_id_type != SILC_ID_SERVER ||
2197 server->server_type == SILC_SERVER)
2200 /* Parse the channel payload */
2201 payload = silc_channel_payload_parse(packet->buffer->data,
2202 packet->buffer->len);
2206 /* Get the channel ID */
2207 channel_id = silc_channel_get_id_parse(payload);
2209 silc_channel_payload_free(payload);
2213 channel_name = silc_channel_get_name(payload, &name_len);
2215 channel_name[255] = '\0';
2217 id = silc_channel_get_id(payload, &id_len);
2219 server_entry = (SilcServerEntry)sock->user_data;
2221 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
2222 /* Add the channel to global list as it is coming from router. It
2223 cannot be our own channel as it is coming from router. */
2225 /* Check that we don't already have this channel */
2226 channel = silc_idlist_find_channel_by_name(server->local_list,
2227 channel_name, NULL);
2229 channel = silc_idlist_find_channel_by_name(server->global_list,
2230 channel_name, NULL);
2232 SILC_LOG_DEBUG(("New channel id(%s) from [Router] %s",
2233 silc_id_render(channel_id, SILC_ID_CHANNEL),
2236 silc_idlist_add_channel(server->global_list, strdup(channel_name),
2237 0, channel_id, sock->user_data, NULL, NULL, 0);
2238 server->stat.channels++;
2241 /* The channel is coming from our server, thus it is in our cell
2242 we will add it to our local list. */
2245 SILC_LOG_DEBUG(("Channel id(%s) from [Server] %s",
2246 silc_id_render(channel_id, SILC_ID_CHANNEL),
2249 /* Check that we don't already have this channel */
2250 channel = silc_idlist_find_channel_by_name(server->local_list,
2251 channel_name, NULL);
2253 channel = silc_idlist_find_channel_by_name(server->global_list,
2254 channel_name, NULL);
2256 /* If the channel does not exist, then create it. This creates a new
2257 key to the channel as well that we will send to the server. */
2259 /* The protocol says that the Channel ID's IP address must be based
2260 on the router's IP address. Check whether the ID is based in our
2261 IP and if it is not then create a new ID and enforce the server
2262 to switch the ID. */
2263 if (server_entry->server_type != SILC_BACKUP_ROUTER &&
2264 !SILC_ID_COMPARE(channel_id, server->id, server->id->ip.data_len)) {
2266 SILC_LOG_DEBUG(("Forcing the server to change Channel ID"));
2268 if (silc_id_create_channel_id(server, server->id, server->rng, &tmp)) {
2269 silc_server_send_notify_channel_change(server, sock, FALSE,
2271 silc_free(channel_id);
2276 /* Create the channel with the provided Channel ID */
2277 channel = silc_server_create_new_channel_with_id(server, NULL, NULL,
2281 silc_channel_payload_free(payload);
2282 silc_free(channel_id);
2286 /* Get the mode and set it to the channel */
2287 channel->mode = silc_channel_get_mode(payload);
2289 /* Send the new channel key to the server */
2290 id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2291 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
2292 chk = silc_channel_key_payload_encode(id_len, id,
2293 strlen(channel->channel_key->
2295 channel->channel_key->cipher->name,
2296 channel->key_len / 8,
2298 silc_server_packet_send(server, sock, SILC_PACKET_CHANNEL_KEY, 0,
2299 chk->data, chk->len, FALSE);
2300 silc_buffer_free(chk);
2303 /* The channel exist by that name, check whether the ID's match.
2304 If they don't then we'll force the server to use the ID we have.
2305 We also create a new key for the channel. */
2306 SilcBuffer users = NULL, users_modes = NULL;
2308 if (!SILC_ID_CHANNEL_COMPARE(channel_id, channel->id)) {
2309 /* They don't match, send CHANNEL_CHANGE notify to the server to
2310 force the ID change. */
2311 SILC_LOG_DEBUG(("Forcing the server to change Channel ID"));
2312 silc_server_send_notify_channel_change(server, sock, FALSE,
2313 channel_id, channel->id);
2316 /* If the mode is different from what we have then enforce the
2318 mode = silc_channel_get_mode(payload);
2319 if (channel->mode != mode) {
2320 SILC_LOG_DEBUG(("Forcing the server to change channel mode"));
2321 silc_server_send_notify_cmode(server, sock, FALSE, channel,
2322 channel->mode, server->id,
2324 channel->cipher, channel->hmac_name,
2325 channel->passphrase);
2328 /* Create new key for the channel and send it to the server and
2329 everybody else possibly on the channel. */
2331 if (!(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2332 if (!silc_server_create_channel_key(server, channel, 0))
2335 /* Send to the channel */
2336 silc_server_send_channel_key(server, sock, channel, FALSE);
2337 id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2338 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
2340 /* Send to the server */
2341 chk = silc_channel_key_payload_encode(id_len, id,
2342 strlen(channel->channel_key->
2344 channel->channel_key->
2346 channel->key_len / 8,
2348 silc_server_packet_send(server, sock, SILC_PACKET_CHANNEL_KEY, 0,
2349 chk->data, chk->len, FALSE);
2350 silc_buffer_free(chk);
2354 silc_free(channel_id);
2356 /* Since the channel is coming from server and we also know about it
2357 then send the JOIN notify to the server so that it see's our
2358 users on the channel "joining" the channel. */
2359 silc_server_announce_get_channel_users(server, channel, &users,
2362 silc_buffer_push(users, users->data - users->head);
2363 silc_server_packet_send(server, sock,
2364 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
2365 users->data, users->len, FALSE);
2366 silc_buffer_free(users);
2369 silc_buffer_push(users_modes, users_modes->data - users_modes->head);
2370 silc_server_packet_send_dest(server, sock,
2371 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
2372 channel->id, SILC_ID_CHANNEL,
2374 users_modes->len, FALSE);
2375 silc_buffer_free(users_modes);
2380 silc_channel_payload_free(payload);
2383 /* Received New Channel List packet, list of New Channel List payloads inside
2384 one packet. Process the New Channel payloads one by one. */
2386 void silc_server_new_channel_list(SilcServer server,
2387 SilcSocketConnection sock,
2388 SilcPacketContext *packet)
2390 SilcPacketContext *new;
2394 SILC_LOG_DEBUG(("Processing New Channel List"));
2396 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
2397 packet->src_id_type != SILC_ID_SERVER ||
2398 server->server_type == SILC_SERVER)
2401 /* If the sender of this packet is server and we are router we need to
2402 broadcast this packet to other routers in the network. Broadcast
2403 this list packet instead of multiple New Channel packets. */
2404 if (!server->standalone && server->server_type == SILC_ROUTER &&
2405 sock->type == SILC_SOCKET_TYPE_SERVER &&
2406 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
2407 SILC_LOG_DEBUG(("Broadcasting received New Channel List packet"));
2408 silc_server_packet_send(server, server->router->connection,
2410 packet->flags | SILC_PACKET_FLAG_BROADCAST,
2411 packet->buffer->data, packet->buffer->len, FALSE);
2412 silc_server_backup_send(server, (SilcServerEntry)sock->user_data,
2413 packet->type, packet->flags,
2414 packet->buffer->data, packet->buffer->len,
2418 /* Make copy of the original packet context, except for the actual
2419 data buffer, which we will here now fetch from the original buffer. */
2420 new = silc_packet_context_alloc();
2421 new->type = SILC_PACKET_NEW_CHANNEL;
2422 new->flags = packet->flags;
2423 new->src_id = packet->src_id;
2424 new->src_id_len = packet->src_id_len;
2425 new->src_id_type = packet->src_id_type;
2426 new->dst_id = packet->dst_id;
2427 new->dst_id_len = packet->dst_id_len;
2428 new->dst_id_type = packet->dst_id_type;
2430 buffer = silc_buffer_alloc(512);
2431 new->buffer = buffer;
2433 while (packet->buffer->len) {
2434 SILC_GET16_MSB(len1, packet->buffer->data);
2435 if ((len1 > packet->buffer->len) ||
2436 (len1 > buffer->truelen))
2439 SILC_GET16_MSB(len2, packet->buffer->data + 2 + len1);
2440 if ((len2 > packet->buffer->len) ||
2441 (len2 > buffer->truelen))
2444 silc_buffer_pull_tail(buffer, 8 + len1 + len2);
2445 silc_buffer_put(buffer, packet->buffer->data, 8 + len1 + len2);
2447 /* Process the New Channel */
2448 silc_server_new_channel(server, sock, new);
2450 silc_buffer_push_tail(buffer, 8 + len1 + len2);
2451 silc_buffer_pull(packet->buffer, 8 + len1 + len2);
2454 silc_buffer_free(buffer);
2458 /* Received key agreement packet. This packet is never for us. It is to
2459 the client in the packet's destination ID. Sending of this sort of packet
2460 equals sending private message, ie. it is sent point to point from
2461 one client to another. */
2463 void silc_server_key_agreement(SilcServer server,
2464 SilcSocketConnection sock,
2465 SilcPacketContext *packet)
2467 SilcSocketConnection dst_sock;
2468 SilcIDListData idata;
2470 SILC_LOG_DEBUG(("Start"));
2472 if (packet->src_id_type != SILC_ID_CLIENT ||
2473 packet->dst_id_type != SILC_ID_CLIENT)
2476 if (!packet->dst_id)
2479 /* Get the route to the client */
2480 dst_sock = silc_server_get_client_route(server, packet->dst_id,
2481 packet->dst_id_len, NULL, &idata);
2485 /* Relay the packet */
2486 silc_server_relay_packet(server, dst_sock, idata->send_key,
2487 idata->hmac_send, idata->psn_send++,
2491 /* Received connection auth request packet that is used during connection
2492 phase to resolve the mandatory authentication method. This packet can
2493 actually be received at anytime but usually it is used only during
2494 the connection authentication phase. Now, protocol says that this packet
2495 can come from client or server, however, we support only this coming
2496 from client and expect that server always knows what authentication
2499 void silc_server_connection_auth_request(SilcServer server,
2500 SilcSocketConnection sock,
2501 SilcPacketContext *packet)
2503 SilcServerConfigClient *client = NULL;
2506 SilcAuthMethod auth_meth = SILC_AUTH_NONE;
2508 SILC_LOG_DEBUG(("Start"));
2510 if (packet->src_id_type && packet->src_id_type != SILC_ID_CLIENT)
2513 /* Parse the payload */
2514 ret = silc_buffer_unformat(packet->buffer,
2515 SILC_STR_UI_SHORT(&conn_type),
2516 SILC_STR_UI_SHORT(NULL),
2521 if (conn_type != SILC_SOCKET_TYPE_CLIENT)
2524 /* Get the authentication method for the client */
2525 auth_meth = SILC_AUTH_NONE;
2526 client = silc_server_config_find_client(server, sock->ip);
2528 client = silc_server_config_find_client(server, sock->hostname);
2530 if (client->passphrase) {
2531 if (client->publickey && !server->config->prefer_passphrase_auth)
2532 auth_meth = SILC_AUTH_PUBLIC_KEY;
2534 auth_meth = SILC_AUTH_PASSWORD;
2535 } else if (client->publickey)
2536 auth_meth = SILC_AUTH_PUBLIC_KEY;
2539 /* Send it back to the client */
2540 silc_server_send_connection_auth_request(server, sock, conn_type, auth_meth);
2543 /* Received REKEY packet. The sender of the packet wants to regenerate
2544 its session keys. This starts the REKEY protocol. */
2546 void silc_server_rekey(SilcServer server,
2547 SilcSocketConnection sock,
2548 SilcPacketContext *packet)
2550 SilcProtocol protocol;
2551 SilcServerRekeyInternalContext *proto_ctx;
2552 SilcIDListData idata = (SilcIDListData)sock->user_data;
2554 SILC_LOG_DEBUG(("Start"));
2556 /* Allocate internal protocol context. This is sent as context
2558 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
2559 proto_ctx->server = (void *)server;
2560 proto_ctx->sock = sock;
2561 proto_ctx->responder = TRUE;
2562 proto_ctx->pfs = idata->rekey->pfs;
2564 /* Perform rekey protocol. Will call the final callback after the
2565 protocol is over. */
2566 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
2567 &protocol, proto_ctx, silc_server_rekey_final);
2568 sock->protocol = protocol;
2570 if (proto_ctx->pfs == FALSE)
2571 /* Run the protocol */
2572 silc_protocol_execute(protocol, server->schedule, 0, 0);
2575 /* Received file transger packet. This packet is never for us. It is to
2576 the client in the packet's destination ID. Sending of this sort of packet
2577 equals sending private message, ie. it is sent point to point from
2578 one client to another. */
2580 void silc_server_ftp(SilcServer server,
2581 SilcSocketConnection sock,
2582 SilcPacketContext *packet)
2584 SilcSocketConnection dst_sock;
2585 SilcIDListData idata;
2587 SILC_LOG_DEBUG(("Start"));
2589 if (packet->src_id_type != SILC_ID_CLIENT ||
2590 packet->dst_id_type != SILC_ID_CLIENT)
2593 if (!packet->dst_id)
2596 /* Get the route to the client */
2597 dst_sock = silc_server_get_client_route(server, packet->dst_id,
2598 packet->dst_id_len, NULL, &idata);
2602 /* Relay the packet */
2603 silc_server_relay_packet(server, dst_sock, idata->send_key,
2604 idata->hmac_send, idata->psn_send++,