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, *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;
52 SILC_LOG_DEBUG(("Start"));
54 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
55 packet->src_id_type != SILC_ID_SERVER)
61 /* If the packet is destined directly to a client then relay the packet
62 before processing it. */
63 if (packet->dst_id_type == SILC_ID_CLIENT) {
65 SilcSocketConnection dst_sock;
67 /* Get the route to the client */
68 dst_sock = silc_server_get_client_route(server, packet->dst_id,
69 packet->dst_id_len, NULL, &idata);
71 /* Relay the packet */
72 silc_server_relay_packet(server, dst_sock, idata->send_key,
73 idata->hmac, packet, TRUE);
76 /* If we are router and this packet is not already broadcast packet
77 we will broadcast it. The sending socket really cannot be router or
78 the router is buggy. If this packet is coming from router then it must
79 have the broadcast flag set already and we won't do anything. */
80 if (!server->standalone && server->server_type == SILC_ROUTER &&
81 sock->type == SILC_SOCKET_TYPE_SERVER &&
82 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
83 SILC_LOG_DEBUG(("Broadcasting received Notify packet"));
84 silc_server_packet_send(server, server->router->connection, packet->type,
85 packet->flags | SILC_PACKET_FLAG_BROADCAST,
86 packet->buffer->data, packet->buffer->len, FALSE);
89 payload = silc_notify_payload_parse(packet->buffer);
93 type = silc_notify_get_type(payload);
94 args = silc_notify_get_args(payload);
99 case SILC_NOTIFY_TYPE_JOIN:
101 * Distribute the notify to local clients on the channel
103 SILC_LOG_DEBUG(("JOIN notify"));
106 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
109 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
113 /* Get channel entry */
114 channel = silc_idlist_find_channel_by_id(server->global_list,
117 channel = silc_idlist_find_channel_by_id(server->local_list,
120 silc_free(channel_id);
124 silc_free(channel_id);
127 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
130 client_id = silc_id_payload_parse_id(tmp, tmp_len);
134 /* Send to channel */
135 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
136 FALSE, packet->buffer->data,
137 packet->buffer->len, FALSE);
139 /* If the the client is not in local list we check global list (ie. the
140 channel will be global channel) and if it does not exist then create
141 entry for the client. */
142 client = silc_idlist_find_client_by_id(server->global_list,
145 client = silc_idlist_find_client_by_id(server->local_list,
148 /* If router did not find the client the it is bogus */
149 if (server->server_type == SILC_ROUTER)
153 silc_idlist_add_client(server->global_list, NULL, 0, NULL, NULL,
154 silc_id_dup(client_id, SILC_ID_CLIENT),
155 sock->user_data, NULL);
157 silc_free(client_id);
161 client->data.registered = TRUE;
165 /* Do not add client to channel if it is there already */
166 if (silc_server_client_on_channel(client, channel))
169 if (server->server_type == SILC_SERVER &&
170 sock->type == SILC_SOCKET_TYPE_ROUTER)
171 /* The channel is global now */
172 channel->global_users = TRUE;
174 /* JOIN the global client to the channel (local clients (if router
175 created the channel) is joined in the pending JOIN command). */
176 chl = silc_calloc(1, sizeof(*chl));
177 chl->client = client;
178 chl->channel = channel;
179 silc_list_add(channel->user_list, chl);
180 silc_list_add(client->channels, chl);
181 silc_free(client_id);
185 case SILC_NOTIFY_TYPE_LEAVE:
187 * Distribute the notify to local clients on the channel
189 SILC_LOG_DEBUG(("LEAVE notify"));
191 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
192 packet->dst_id_type);
196 /* Get channel entry */
197 channel = silc_idlist_find_channel_by_id(server->global_list,
200 channel = silc_idlist_find_channel_by_id(server->local_list,
203 silc_free(channel_id);
209 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
211 silc_free(channel_id);
214 client_id = silc_id_payload_parse_id(tmp, tmp_len);
216 silc_free(channel_id);
220 /* Send to channel */
221 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
222 FALSE, packet->buffer->data,
223 packet->buffer->len, FALSE);
225 /* Get client entry */
226 client = silc_idlist_find_client_by_id(server->global_list,
229 client = silc_idlist_find_client_by_id(server->local_list,
232 silc_free(client_id);
233 silc_free(channel_id);
237 silc_free(client_id);
239 /* Remove the user from channel */
240 silc_server_remove_from_one_channel(server, sock, channel, client, FALSE);
243 case SILC_NOTIFY_TYPE_SIGNOFF:
245 * Distribute the notify to local clients on the channel
247 SILC_LOG_DEBUG(("SIGNOFF notify"));
250 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
253 client_id = silc_id_payload_parse_id(tmp, tmp_len);
257 /* Get client entry */
258 client = silc_idlist_find_client_by_id(server->global_list,
261 client = silc_idlist_find_client_by_id(server->local_list,
264 silc_free(client_id);
268 silc_free(client_id);
270 /* Get signoff message */
271 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
275 /* Remove the client from all channels */
276 silc_server_remove_from_channels(server, NULL, client, TRUE, tmp, TRUE);
278 client->data.registered = FALSE;
279 cache->expire = SILC_ID_CACHE_EXPIRE_DEF;
282 /* Remove the client entry */
283 if (!silc_idlist_del_client(server->global_list, client))
284 silc_idlist_del_client(server->local_list, client);
288 case SILC_NOTIFY_TYPE_TOPIC_SET:
290 * Distribute the notify to local clients on the channel
293 SILC_LOG_DEBUG(("TOPIC SET notify"));
295 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
296 packet->dst_id_type);
300 /* Get channel entry */
301 channel = silc_idlist_find_channel_by_id(server->global_list,
304 channel = silc_idlist_find_channel_by_id(server->local_list,
307 silc_free(channel_id);
313 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
315 silc_free(channel_id);
320 silc_free(channel->topic);
321 channel->topic = silc_calloc(tmp_len, sizeof(*channel->topic));
322 memcpy(channel->topic, tmp, tmp_len);
324 /* Send the same notify to the channel */
325 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
326 FALSE, packet->buffer->data,
327 packet->buffer->len, FALSE);
328 silc_free(channel_id);
331 case SILC_NOTIFY_TYPE_NICK_CHANGE:
334 * Distribute the notify to local clients on the channel
336 unsigned char *id, *id2;
338 SILC_LOG_DEBUG(("NICK CHANGE notify"));
340 /* Get old client ID */
341 id = silc_argument_get_arg_type(args, 1, &tmp_len);
344 client_id = silc_id_payload_parse_id(id, tmp_len);
348 /* Get new client ID */
349 id2 = silc_argument_get_arg_type(args, 2, &tmp_len);
352 client_id2 = silc_id_payload_parse_id(id2, tmp_len);
356 SILC_LOG_DEBUG(("Old Client ID id(%s)",
357 silc_id_render(client_id, SILC_ID_CLIENT)));
358 SILC_LOG_DEBUG(("New Client ID id(%s)",
359 silc_id_render(client_id2, SILC_ID_CLIENT)));
361 /* Replace the Client ID */
362 client = silc_idlist_replace_client_id(server->global_list, client_id,
365 client = silc_idlist_replace_client_id(server->local_list, client_id,
369 /* The nickname is not valid anymore, set it NULL. This causes that
370 the nickname will be queried if someone wants to know it. */
371 if (client->nickname)
372 silc_free(client->nickname);
373 client->nickname = NULL;
375 /* Send the NICK_CHANGE notify type to local clients on the channels
376 this client is joined to. */
377 silc_server_send_notify_on_channels(server, NULL, client,
378 SILC_NOTIFY_TYPE_NICK_CHANGE, 2,
383 silc_free(client_id);
385 silc_free(client_id2);
389 case SILC_NOTIFY_TYPE_CMODE_CHANGE:
391 * Distribute the notify to local clients on the channel
394 SILC_LOG_DEBUG(("CMODE CHANGE notify"));
396 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
397 packet->dst_id_type);
401 /* Get channel entry */
402 channel = silc_idlist_find_channel_by_id(server->global_list,
405 channel = silc_idlist_find_channel_by_id(server->local_list,
408 silc_free(channel_id);
413 /* Send the same notify to the channel */
414 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
415 FALSE, packet->buffer->data,
416 packet->buffer->len, FALSE);
419 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
421 silc_free(channel_id);
425 SILC_GET32_MSB(mode, tmp);
427 /* If the channel had private keys set and the mode was removed then
428 we must re-generate and re-distribute a new channel key */
429 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY &&
430 !(mode & SILC_CHANNEL_MODE_PRIVKEY)) {
431 /* Re-generate channel key */
432 silc_server_create_channel_key(server, channel, 0);
434 /* Send the channel key. This sends it to our local clients and if
435 we are normal server to our router as well. */
436 silc_server_send_channel_key(server, NULL, channel,
437 server->server_type == SILC_ROUTER ?
438 FALSE : !server->standalone);
442 channel->mode = mode;
443 silc_free(channel_id);
446 tmp = silc_argument_get_arg_type(args, 4, &tmp_len);
448 unsigned char hash[32];
451 silc_hmac_free(channel->hmac);
452 if (!silc_hmac_alloc(tmp, NULL, &channel->hmac))
455 /* Set the HMAC key out of current channel key. The client must do
457 silc_hash_make(channel->hmac->hash, channel->key, channel->key_len / 8,
459 silc_hmac_set_key(channel->hmac, hash,
460 silc_hash_len(channel->hmac->hash));
461 memset(hash, 0, sizeof(hash));
466 case SILC_NOTIFY_TYPE_CUMODE_CHANGE:
468 * Distribute the notify to local clients on the channel
471 SILC_LOG_DEBUG(("CUMODE CHANGE notify"));
473 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
474 packet->dst_id_type);
478 /* Get channel entry */
479 channel = silc_idlist_find_channel_by_id(server->global_list,
482 channel = silc_idlist_find_channel_by_id(server->local_list,
485 silc_free(channel_id);
491 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
493 silc_free(channel_id);
497 SILC_GET32_MSB(mode, tmp);
499 /* Get target client */
500 tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
503 client_id = silc_id_payload_parse_id(tmp, tmp_len);
507 /* Get client entry */
508 client = silc_idlist_find_client_by_id(server->global_list,
511 client = silc_idlist_find_client_by_id(server->local_list,
514 silc_free(client_id);
518 silc_free(client_id);
520 /* Get entry to the channel user list */
521 silc_list_start(channel->user_list);
522 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END)
523 if (chl->client == client) {
524 /* Change the mode */
529 /* Send the same notify to the channel */
530 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
531 FALSE, packet->buffer->data,
532 packet->buffer->len, FALSE);
533 silc_free(channel_id);
536 case SILC_NOTIFY_TYPE_INVITE:
538 if (packet->dst_id_type == SILC_ID_CLIENT)
541 SILC_LOG_DEBUG(("INVITE notify"));
544 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
547 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
551 /* Get channel entry */
552 channel = silc_idlist_find_channel_by_id(server->global_list,
555 channel = silc_idlist_find_channel_by_id(server->local_list,
558 silc_free(channel_id);
562 silc_free(channel_id);
564 /* Get the added invite */
565 tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
567 if (!channel->invite_list)
568 channel->invite_list = silc_calloc(tmp_len + 2,
569 sizeof(*channel->invite_list));
571 channel->invite_list = silc_realloc(channel->invite_list,
572 sizeof(*channel->invite_list) *
574 strlen(channel->invite_list) +
576 if (tmp[tmp_len - 1] == ',')
577 tmp[tmp_len - 1] = '\0';
579 strncat(channel->invite_list, tmp, tmp_len);
580 strncat(channel->invite_list, ",", 1);
583 /* Get the deleted invite */
584 tmp = silc_argument_get_arg_type(args, 4, &tmp_len);
585 if (tmp && channel->invite_list) {
586 char *start, *end, *n;
588 if (!strncmp(channel->invite_list, tmp,
589 strlen(channel->invite_list) - 1)) {
590 silc_free(channel->invite_list);
591 channel->invite_list = NULL;
593 start = strstr(channel->invite_list, tmp);
594 if (start && strlen(start) >= tmp_len) {
595 end = start + tmp_len;
596 n = silc_calloc(strlen(channel->invite_list) - tmp_len, sizeof(*n));
597 strncat(n, channel->invite_list, start - channel->invite_list);
598 strncat(n, end + 1, ((channel->invite_list +
599 strlen(channel->invite_list)) - end) - 1);
600 silc_free(channel->invite_list);
601 channel->invite_list = n;
608 case SILC_NOTIFY_TYPE_CHANNEL_CHANGE:
610 * Distribute to the local clients on the channel and change the
614 SILC_LOG_DEBUG(("CHANNEL CHANGE"));
616 if (sock->type != SILC_SOCKET_TYPE_ROUTER)
619 /* Get the old Channel ID */
620 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
623 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
627 /* Get the channel entry */
628 channel = silc_idlist_find_channel_by_id(server->global_list,
631 channel = silc_idlist_find_channel_by_id(server->local_list,
634 silc_free(channel_id);
639 /* Send the notify to the channel */
640 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
641 FALSE, packet->buffer->data,
642 packet->buffer->len, FALSE);
644 /* Get the new Channel ID */
645 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
648 channel_id2 = silc_id_payload_parse_id(tmp, tmp_len);
652 SILC_LOG_DEBUG(("Old Channel ID id(%s)",
653 silc_id_render(channel_id, SILC_ID_CHANNEL)));
654 SILC_LOG_DEBUG(("New Channel ID id(%s)",
655 silc_id_render(channel_id2, SILC_ID_CHANNEL)));
657 /* Replace the Channel ID */
658 if (!silc_idlist_replace_channel_id(server->global_list, channel_id,
660 if (!silc_idlist_replace_channel_id(server->local_list, channel_id,
662 silc_free(channel_id2);
667 SilcBuffer users = NULL;
669 /* Re-announce our clients on the channel as the ID has changed now */
670 silc_server_announce_get_channel_users(server, channel, &users);
672 silc_buffer_push(users, users->data - users->head);
673 silc_server_packet_send(server, sock,
674 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
675 users->data, users->len, FALSE);
676 silc_buffer_free(users);
680 silc_free(channel_id);
684 case SILC_NOTIFY_TYPE_SERVER_SIGNOFF:
686 * Remove the server entry and all clients that this server owns.
689 SILC_LOG_DEBUG(("SERVER SIGNOFF notify"));
692 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
695 server_id = silc_id_payload_parse_id(tmp, tmp_len);
699 /* Get server entry */
700 server_entry = silc_idlist_find_server_by_id(server->global_list,
703 server_entry = silc_idlist_find_server_by_id(server->local_list,
706 silc_free(server_id);
710 silc_free(server_id);
712 /* Free all client entries that this server owns as they will
713 become invalid now as well. */
714 silc_server_remove_clients_by_server(server, server_entry, TRUE);
716 /* Remove the server entry */
717 if (!silc_idlist_del_server(server->global_list, server_entry))
718 silc_idlist_del_server(server->local_list, server_entry);
720 /* XXX update statistics */
724 case SILC_NOTIFY_TYPE_KICKED:
726 * Distribute the notify to local clients on the channel
729 SILC_LOG_DEBUG(("KICKED notify"));
731 channel_id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
732 packet->dst_id_type);
736 /* Get channel entry */
737 channel = silc_idlist_find_channel_by_id(server->global_list,
740 channel = silc_idlist_find_channel_by_id(server->local_list,
743 silc_free(channel_id);
747 silc_free(channel_id);
750 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
753 client_id = silc_id_payload_parse_id(tmp, tmp_len);
757 /* Send to channel */
758 silc_server_packet_send_to_channel(server, sock, channel, packet->type,
759 FALSE, packet->buffer->data,
760 packet->buffer->len, FALSE);
762 /* If the the client is not in local list we check global list */
763 client = silc_idlist_find_client_by_id(server->global_list,
766 client = silc_idlist_find_client_by_id(server->local_list,
769 silc_free(client_id);
774 /* Remove the client from channel */
775 silc_server_remove_from_one_channel(server, sock, channel, client, FALSE);
779 case SILC_NOTIFY_TYPE_KILLED:
782 * Distribute the notify to local clients on channels
787 SILC_LOG_DEBUG(("KILLED notify"));
790 id = silc_argument_get_arg_type(args, 1, &id_len);
793 client_id = silc_id_payload_parse_id(id, id_len);
797 /* If the the client is not in local list we check global list */
798 client = silc_idlist_find_client_by_id(server->global_list,
801 client = silc_idlist_find_client_by_id(server->local_list,
804 silc_free(client_id);
808 silc_free(client_id);
810 /* If the client is one of ours, then close the connection to the
811 client now. This removes the client from all channels as well. */
812 if (packet->dst_id_type == SILC_ID_CLIENT && client->data.registered &&
813 client->connection) {
814 sock = client->connection;
815 silc_server_free_client_data(server, NULL, client, FALSE, NULL);
816 silc_server_close_connection(server, sock);
821 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
825 /* Send the notify to local clients on the channels except to the
826 client who is killed. */
827 silc_server_send_notify_on_channels(server, client, client,
828 SILC_NOTIFY_TYPE_KILLED,
833 /* Remove the client from all channels */
834 silc_server_remove_from_channels(server, NULL, client, FALSE, NULL,
840 case SILC_NOTIFY_TYPE_UMODE_CHANGE:
842 * Save the mode of the client.
845 SILC_LOG_DEBUG(("UMODE_CHANGE notify"));
848 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
851 client_id = silc_id_payload_parse_id(tmp, tmp_len);
855 /* Get client entry */
856 client = silc_idlist_find_client_by_id(server->global_list,
859 client = silc_idlist_find_client_by_id(server->local_list,
862 silc_free(client_id);
866 silc_free(client_id);
869 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
874 SILC_GET32_MSB(client->mode, tmp);
878 case SILC_NOTIFY_TYPE_BAN:
883 SILC_LOG_DEBUG(("BAN notify"));
886 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
889 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
893 /* Get channel entry */
894 channel = silc_idlist_find_channel_by_id(server->global_list,
897 channel = silc_idlist_find_channel_by_id(server->local_list,
900 silc_free(channel_id);
904 silc_free(channel_id);
906 /* Get the new ban and add it to the ban list */
907 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
909 if (!channel->ban_list)
910 channel->ban_list = silc_calloc(tmp_len + 2,
911 sizeof(*channel->ban_list));
913 channel->ban_list = silc_realloc(channel->ban_list,
914 sizeof(*channel->ban_list) *
916 strlen(channel->ban_list) + 2));
917 strncat(channel->ban_list, tmp, tmp_len);
918 strncat(channel->ban_list, ",", 1);
921 /* Get the ban to be removed and remove it from the list */
922 tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
923 if (tmp && channel->ban_list) {
924 char *start, *end, *n;
926 if (!strcmp(channel->ban_list, tmp)) {
927 silc_free(channel->ban_list);
928 channel->ban_list = NULL;
930 start = strstr(channel->ban_list, tmp);
931 if (start && strlen(start) >= tmp_len) {
932 end = start + tmp_len;
933 n = silc_calloc(strlen(channel->ban_list) - tmp_len, sizeof(*n));
934 strncat(n, channel->ban_list, start - channel->ban_list);
935 strncat(n, end + 1, ((channel->ban_list +
936 strlen(channel->ban_list)) - end) - 1);
937 silc_free(channel->ban_list);
938 channel->ban_list = n;
945 /* Ignore rest of the notify types for now */
946 case SILC_NOTIFY_TYPE_NONE:
947 case SILC_NOTIFY_TYPE_MOTD:
954 silc_notify_payload_free(payload);
957 void silc_server_notify_list(SilcServer server,
958 SilcSocketConnection sock,
959 SilcPacketContext *packet)
961 SilcPacketContext *new;
965 SILC_LOG_DEBUG(("Processing New Notify List"));
967 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
968 packet->src_id_type != SILC_ID_SERVER)
971 /* Make copy of the original packet context, except for the actual
972 data buffer, which we will here now fetch from the original buffer. */
973 new = silc_packet_context_alloc();
974 new->type = SILC_PACKET_NOTIFY;
975 new->flags = packet->flags;
976 new->src_id = packet->src_id;
977 new->src_id_len = packet->src_id_len;
978 new->src_id_type = packet->src_id_type;
979 new->dst_id = packet->dst_id;
980 new->dst_id_len = packet->dst_id_len;
981 new->dst_id_type = packet->dst_id_type;
983 buffer = silc_buffer_alloc(1024);
984 new->buffer = buffer;
986 while (packet->buffer->len) {
987 SILC_GET16_MSB(len, packet->buffer->data + 2);
988 if (len > packet->buffer->len)
991 if (len > buffer->truelen) {
992 silc_buffer_free(buffer);
993 buffer = silc_buffer_alloc(1024 + len);
996 silc_buffer_pull_tail(buffer, len);
997 silc_buffer_put(buffer, packet->buffer->data, len);
999 /* Process the Notify */
1000 silc_server_notify(server, sock, new);
1002 silc_buffer_push_tail(buffer, len);
1003 silc_buffer_pull(packet->buffer, len);
1006 silc_buffer_free(buffer);
1010 /* Received private message. This resolves the destination of the message
1011 and sends the packet. This is used by both server and router. If the
1012 destination is our locally connected client this sends the packet to
1013 the client. This may also send the message for further routing if
1014 the destination is not in our server (or router). */
1016 void silc_server_private_message(SilcServer server,
1017 SilcSocketConnection sock,
1018 SilcPacketContext *packet)
1020 SilcSocketConnection dst_sock;
1021 SilcIDListData idata;
1023 SILC_LOG_DEBUG(("Start"));
1025 if (packet->src_id_type != SILC_ID_CLIENT ||
1026 packet->dst_id_type != SILC_ID_CLIENT)
1029 if (!packet->dst_id)
1032 /* Get the route to the client */
1033 dst_sock = silc_server_get_client_route(server, packet->dst_id,
1034 packet->dst_id_len, NULL, &idata);
1038 /* Send the private message */
1039 silc_server_send_private_message(server, dst_sock, idata->send_key,
1040 idata->hmac, packet);
1043 /* Received private message key packet.. This packet is never for us. It is to
1044 the client in the packet's destination ID. Sending of this sort of packet
1045 equals sending private message, ie. it is sent point to point from
1046 one client to another. */
1048 void silc_server_private_message_key(SilcServer server,
1049 SilcSocketConnection sock,
1050 SilcPacketContext *packet)
1052 SilcSocketConnection dst_sock;
1053 SilcIDListData idata;
1055 SILC_LOG_DEBUG(("Start"));
1057 if (packet->src_id_type != SILC_ID_CLIENT ||
1058 packet->dst_id_type != SILC_ID_CLIENT)
1061 if (!packet->dst_id)
1064 /* Get the route to the client */
1065 dst_sock = silc_server_get_client_route(server, packet->dst_id,
1066 packet->dst_id_len, NULL, &idata);
1070 /* Relay the packet */
1071 silc_server_relay_packet(server, dst_sock, idata->send_key,
1072 idata->hmac, packet, FALSE);
1075 /* Processes incoming command reply packet. The command reply packet may
1076 be destined to one of our clients or it may directly for us. We will
1077 call the command reply routine after processing the packet. */
1079 void silc_server_command_reply(SilcServer server,
1080 SilcSocketConnection sock,
1081 SilcPacketContext *packet)
1083 SilcBuffer buffer = packet->buffer;
1084 SilcClientEntry client = NULL;
1085 SilcSocketConnection dst_sock;
1086 SilcIDListData idata;
1087 SilcClientID *id = NULL;
1089 SILC_LOG_DEBUG(("Start"));
1091 /* Source must be server or router */
1092 if (packet->src_id_type != SILC_ID_SERVER &&
1093 sock->type != SILC_SOCKET_TYPE_ROUTER)
1096 if (packet->dst_id_type == SILC_ID_CHANNEL)
1099 if (packet->dst_id_type == SILC_ID_CLIENT) {
1100 /* Destination must be one of ours */
1101 id = silc_id_str2id(packet->dst_id, packet->dst_id_len, SILC_ID_CLIENT);
1104 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
1106 SILC_LOG_ERROR(("Cannot process command reply to unknown client"));
1112 if (packet->dst_id_type == SILC_ID_SERVER) {
1113 /* For now this must be for us */
1114 if (SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1115 SILC_LOG_ERROR(("Cannot process command reply to unknown server"));
1120 /* Execute command reply locally for the command */
1121 silc_server_command_reply_process(server, sock, buffer);
1123 if (packet->dst_id_type == SILC_ID_CLIENT && client && id) {
1124 /* Relay the packet to the client */
1126 dst_sock = (SilcSocketConnection)client->connection;
1127 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1128 + packet->dst_id_len + packet->padlen);
1130 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
1131 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
1133 idata = (SilcIDListData)client;
1135 /* Encrypt packet */
1136 silc_packet_encrypt(idata->send_key, idata->hmac, dst_sock->outbuf,
1139 /* Send the packet */
1140 silc_server_packet_send_real(server, dst_sock, TRUE);
1146 /* Process received channel message. The message can be originated from
1147 client or server. */
1149 void silc_server_channel_message(SilcServer server,
1150 SilcSocketConnection sock,
1151 SilcPacketContext *packet)
1153 SilcChannelEntry channel = NULL;
1154 SilcChannelClientEntry chl;
1155 SilcChannelID *id = NULL;
1156 void *sender = NULL;
1158 SILC_LOG_DEBUG(("Processing channel message"));
1161 if (packet->dst_id_type != SILC_ID_CHANNEL) {
1162 SILC_LOG_DEBUG(("Received bad message for channel, dropped"));
1166 /* Find channel entry */
1167 id = silc_id_str2id(packet->dst_id, packet->dst_id_len, SILC_ID_CHANNEL);
1170 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
1172 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
1174 SILC_LOG_DEBUG(("Could not find channel"));
1179 /* See that this client is on the channel. If the message is coming
1180 from router we won't do the check as the message is from client that
1181 we don't know about. Also, if the original sender is not client
1182 (as it can be server as well) we don't do the check. */
1183 sender = silc_id_str2id(packet->src_id, packet->src_id_len,
1184 packet->src_id_type);
1187 if (sock->type != SILC_SOCKET_TYPE_ROUTER &&
1188 packet->src_id_type == SILC_ID_CLIENT) {
1189 silc_list_start(channel->user_list);
1190 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1191 if (chl->client && !SILC_ID_CLIENT_COMPARE(chl->client->id, sender))
1194 if (chl == SILC_LIST_END) {
1195 SILC_LOG_DEBUG(("Client not on channel"));
1200 /* If we are router and the packet came from router and private key
1201 has not been set for the channel then we must encrypt the packet
1202 as it was decrypted with the session key shared between us and the
1203 router which sent it. This is so, because cells does not share the
1205 if (server->server_type == SILC_ROUTER &&
1206 sock->type == SILC_SOCKET_TYPE_ROUTER &&
1207 !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
1210 uint16 data_len, flags;
1212 iv_len = silc_cipher_get_block_len(channel->channel_key);
1213 if (channel->iv[0] == '\0')
1214 for (i = 0; i < iv_len; i++) channel->iv[i] =
1215 silc_rng_get_byte(server->rng);
1217 silc_hash_make(server->md5hash, channel->iv, iv_len, channel->iv);
1219 /* Encode new payload. This encrypts it also. */
1220 SILC_GET16_MSB(flags, packet->buffer->data);
1221 SILC_GET16_MSB(data_len, packet->buffer->data + 2);
1222 chp = silc_channel_message_payload_encode(flags, data_len,
1223 packet->buffer->data + 4,
1224 iv_len, channel->iv,
1225 channel->channel_key,
1227 silc_buffer_put(packet->buffer, chp->data, chp->len);
1228 silc_buffer_free(chp);
1231 /* Distribute the packet to our local clients. This will send the
1232 packet for further routing as well, if needed. */
1233 silc_server_packet_relay_to_channel(server, sock, channel, sender,
1234 packet->src_id_type,
1235 packet->buffer->data,
1236 packet->buffer->len, FALSE);
1245 /* Received channel key packet. We distribute the key to all of our locally
1246 connected clients on the channel. */
1248 void silc_server_channel_key(SilcServer server,
1249 SilcSocketConnection sock,
1250 SilcPacketContext *packet)
1252 SilcBuffer buffer = packet->buffer;
1253 SilcChannelEntry channel;
1255 if (packet->src_id_type != SILC_ID_SERVER ||
1256 (server->server_type == SILC_ROUTER &&
1257 sock->type == SILC_SOCKET_TYPE_ROUTER))
1260 /* Save the channel key */
1261 channel = silc_server_save_channel_key(server, buffer, NULL);
1265 /* Distribute the key to everybody who is on the channel. If we are router
1266 we will also send it to locally connected servers. */
1267 silc_server_send_channel_key(server, sock, channel, FALSE);
1270 /* Received New Client packet and processes it. Creates Client ID for the
1271 client. Client becomes registered after calling this functions. */
1273 SilcClientEntry silc_server_new_client(SilcServer server,
1274 SilcSocketConnection sock,
1275 SilcPacketContext *packet)
1277 SilcBuffer buffer = packet->buffer;
1278 SilcClientEntry client;
1279 SilcIDCacheEntry cache;
1280 SilcClientID *client_id;
1282 SilcIDListData idata;
1283 char *username = NULL, *realname = NULL, *id_string;
1286 SILC_LOG_DEBUG(("Creating new client"));
1288 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
1291 /* Take client entry */
1292 client = (SilcClientEntry)sock->user_data;
1293 idata = (SilcIDListData)client;
1295 /* Fetch the old client cache entry so that we can update it. */
1296 if (!silc_idcache_find_by_context(server->local_list->clients,
1297 sock->user_data, &cache)) {
1298 SILC_LOG_ERROR(("Lost client's cache entry - bad thing"));
1299 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1304 /* Parse incoming packet */
1305 ret = silc_buffer_unformat(buffer,
1306 SILC_STR_UI16_STRING_ALLOC(&username),
1307 SILC_STR_UI16_STRING_ALLOC(&realname),
1311 silc_free(username);
1313 silc_free(realname);
1314 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1315 "Incomplete client information");
1320 silc_free(username);
1322 silc_free(realname);
1323 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1324 "Incomplete client information");
1328 /* Create Client ID */
1329 silc_id_create_client_id(server->id, server->rng, server->md5hash,
1330 username, &client_id);
1332 if (strlen(username) > 128)
1333 username[127] = '\0';
1335 /* Update client entry */
1336 idata->registered = TRUE;
1337 client->nickname = strdup(username);
1338 client->username = username;
1339 client->userinfo = realname ? realname : strdup(" ");
1340 client->id = client_id;
1342 /* Update the cache entry */
1343 cache->id = (void *)client_id;
1344 cache->type = SILC_ID_CLIENT;
1345 cache->data = username;
1346 cache->data_len = strlen(username);
1347 silc_idcache_sort_by_data(server->local_list->clients);
1349 /* Notify our router about new client on the SILC network */
1350 if (!server->standalone)
1351 silc_server_send_new_id(server, (SilcSocketConnection)
1352 server->router->connection,
1353 server->server_type == SILC_ROUTER ? TRUE : FALSE,
1354 client->id, SILC_ID_CLIENT, SILC_ID_CLIENT_LEN);
1356 /* Send the new client ID to the client. */
1357 id_string = silc_id_id2str(client->id, SILC_ID_CLIENT);
1358 reply = silc_buffer_alloc(2 + 2 + SILC_ID_CLIENT_LEN);
1359 silc_buffer_pull_tail(reply, SILC_BUFFER_END(reply));
1360 silc_buffer_format(reply,
1361 SILC_STR_UI_SHORT(SILC_ID_CLIENT),
1362 SILC_STR_UI_SHORT(SILC_ID_CLIENT_LEN),
1363 SILC_STR_UI_XNSTRING(id_string, SILC_ID_CLIENT_LEN),
1365 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID, 0,
1366 reply->data, reply->len, FALSE);
1367 silc_free(id_string);
1368 silc_buffer_free(reply);
1370 /* Send some nice info to the client */
1371 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1372 ("Welcome to the SILC Network %s@%s",
1373 username, sock->hostname));
1374 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1375 ("Your host is %s, running version %s",
1376 server->config->server_info->server_name,
1378 if (server->server_type == SILC_ROUTER) {
1379 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1380 ("There are %d clients on %d servers in SILC "
1381 "Network", server->stat.clients,
1382 server->stat.servers + 1));
1383 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1384 ("There are %d clients on %d server in our cell",
1385 server->stat.cell_clients,
1386 server->stat.cell_servers + 1));
1387 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1388 ("I have %d clients, %d channels, %d servers and "
1390 server->stat.my_clients,
1391 server->stat.my_channels,
1392 server->stat.my_servers,
1393 server->stat.my_routers));
1394 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1395 ("%d server operators and %d router operators "
1397 server->stat.my_server_ops,
1398 server->stat.my_router_ops));
1400 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1401 ("I have %d clients and %d channels formed",
1402 server->stat.my_clients,
1403 server->stat.my_channels));
1404 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1405 ("%d operators online",
1406 server->stat.my_server_ops));
1408 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1409 ("Your connection is secured with %s cipher, "
1410 "key length %d bits",
1411 idata->send_key->cipher->name,
1412 idata->send_key->cipher->key_len));
1413 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
1414 ("Your current nickname is %s",
1418 silc_server_send_motd(server, sock);
1423 /* Create new server. This processes received New Server packet and
1424 saves the received Server ID. The server is our locally connected
1425 server thus we save all the information and save it to local list.
1426 This funtion can be used by both normal server and router server.
1427 If normal server uses this it means that its router has connected
1428 to the server. If router uses this it means that one of the cell's
1429 servers is connected to the router. */
1431 SilcServerEntry silc_server_new_server(SilcServer server,
1432 SilcSocketConnection sock,
1433 SilcPacketContext *packet)
1435 SilcBuffer buffer = packet->buffer;
1436 SilcServerEntry new_server;
1437 SilcIDCacheEntry cache;
1438 SilcServerID *server_id;
1439 SilcIDListData idata;
1440 unsigned char *server_name, *id_string;
1441 uint16 id_len, name_len;
1444 SILC_LOG_DEBUG(("Creating new server"));
1446 if (sock->type != SILC_SOCKET_TYPE_SERVER &&
1447 sock->type != SILC_SOCKET_TYPE_ROUTER)
1450 /* Take server entry */
1451 new_server = (SilcServerEntry)sock->user_data;
1452 idata = (SilcIDListData)new_server;
1454 /* Fetch the old server cache entry so that we can update it. */
1455 if (!silc_idcache_find_by_context(server->local_list->servers,
1456 sock->user_data, &cache)) {
1457 SILC_LOG_ERROR(("Lost server's cache entry - bad thing"));
1461 /* Parse the incoming packet */
1462 ret = silc_buffer_unformat(buffer,
1463 SILC_STR_UI16_NSTRING_ALLOC(&id_string, &id_len),
1464 SILC_STR_UI16_NSTRING_ALLOC(&server_name,
1469 silc_free(id_string);
1471 silc_free(server_name);
1475 if (id_len > buffer->len) {
1476 silc_free(id_string);
1477 silc_free(server_name);
1482 server_name[255] = '\0';
1485 server_id = silc_id_str2id(id_string, id_len, SILC_ID_SERVER);
1487 silc_free(id_string);
1488 silc_free(server_name);
1491 silc_free(id_string);
1493 /* Update client entry */
1494 idata->registered = TRUE;
1495 new_server->server_name = server_name;
1496 new_server->id = server_id;
1498 /* Update the cache entry */
1499 cache->id = (void *)server_id;
1500 cache->type = SILC_ID_SERVER;
1501 cache->data = server_name;
1502 cache->data_len = strlen(server_name);
1503 silc_idcache_sort_by_data(server->local_list->servers);
1505 /* Distribute the information about new server in the SILC network
1506 to our router. If we are normal server we won't send anything
1507 since this connection must be our router connection. */
1508 if (server->server_type == SILC_ROUTER && !server->standalone &&
1509 server->router->connection != sock)
1510 silc_server_send_new_id(server, server->router->connection,
1511 TRUE, new_server->id, SILC_ID_SERVER,
1512 SILC_ID_SERVER_LEN);
1514 if (server->server_type == SILC_ROUTER)
1515 server->stat.cell_servers++;
1520 /* Processes incoming New ID packet. New ID Payload is used to distribute
1521 information about newly registered clients and servers. */
1523 static void silc_server_new_id_real(SilcServer server,
1524 SilcSocketConnection sock,
1525 SilcPacketContext *packet,
1528 SilcBuffer buffer = packet->buffer;
1530 SilcServerEntry router;
1531 SilcSocketConnection router_sock;
1534 unsigned char *hash = NULL;
1537 SILC_LOG_DEBUG(("Processing new ID"));
1539 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
1540 server->server_type == SILC_SERVER ||
1541 packet->src_id_type != SILC_ID_SERVER)
1544 idp = silc_id_payload_parse(buffer);
1548 id_type = silc_id_payload_get_type(idp);
1550 /* Normal server cannot have other normal server connections */
1551 if (id_type == SILC_ID_SERVER && sock->type == SILC_SOCKET_TYPE_SERVER)
1554 id = silc_id_payload_get_id(idp);
1558 /* If the sender of this packet is server and we are router we need to
1559 broadcast this packet to other routers in the network. */
1560 if (broadcast && !server->standalone && server->server_type == SILC_ROUTER &&
1561 sock->type == SILC_SOCKET_TYPE_SERVER &&
1562 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
1563 SILC_LOG_DEBUG(("Broadcasting received New ID packet"));
1564 silc_server_packet_send(server, server->router->connection,
1566 packet->flags | SILC_PACKET_FLAG_BROADCAST,
1567 buffer->data, buffer->len, FALSE);
1570 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1571 id_list = server->local_list;
1573 id_list = server->global_list;
1576 router = sock->user_data;
1579 case SILC_ID_CLIENT:
1581 SilcClientEntry entry;
1583 SILC_LOG_DEBUG(("New client id(%s) from [%s] %s",
1584 silc_id_render(id, SILC_ID_CLIENT),
1585 sock->type == SILC_SOCKET_TYPE_SERVER ?
1586 "Server" : "Router", sock->hostname));
1588 /* As a router we keep information of all global information in our
1589 global list. Cell wide information however is kept in the local
1590 list. The client is put to global list and we will take the hash
1591 value of the Client ID and save it to the ID Cache system for fast
1592 searching in the future. */
1593 hash = silc_calloc(sizeof(((SilcClientID *)id)->hash),
1594 sizeof(unsigned char));
1595 memcpy(hash, ((SilcClientID *)id)->hash,
1596 sizeof(((SilcClientID *)id)->hash));
1597 entry = silc_idlist_add_client(id_list, hash,
1598 sizeof(((SilcClientID *)id)->hash),
1599 NULL, NULL, id, router, NULL);
1600 entry->nickname = NULL;
1601 entry->data.registered = TRUE;
1603 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1604 server->stat.cell_clients++;
1605 server->stat.clients++;
1609 case SILC_ID_SERVER:
1610 SILC_LOG_DEBUG(("New server id(%s) from [%s] %s",
1611 silc_id_render(id, SILC_ID_SERVER),
1612 sock->type == SILC_SOCKET_TYPE_SERVER ?
1613 "Server" : "Router", sock->hostname));
1615 /* As a router we keep information of all global information in our global
1616 list. Cell wide information however is kept in the local list. */
1617 silc_idlist_add_server(id_list, NULL, 0, id, router, router_sock);
1619 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1620 server->stat.cell_servers++;
1621 server->stat.servers++;
1624 case SILC_ID_CHANNEL:
1625 SILC_LOG_ERROR(("Channel cannot be registered with NEW_ID packet"));
1633 silc_id_payload_free(idp);
1637 /* Processes incoming New ID packet. New ID Payload is used to distribute
1638 information about newly registered clients and servers. */
1640 void silc_server_new_id(SilcServer server, SilcSocketConnection sock,
1641 SilcPacketContext *packet)
1643 silc_server_new_id_real(server, sock, packet, TRUE);
1646 /* Receoved New Id List packet, list of New ID payloads inside one
1647 packet. Process the New ID payloads one by one. */
1649 void silc_server_new_id_list(SilcServer server, SilcSocketConnection sock,
1650 SilcPacketContext *packet)
1652 SilcPacketContext *new_id;
1656 SILC_LOG_DEBUG(("Processing New ID List"));
1658 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
1659 packet->src_id_type != SILC_ID_SERVER)
1662 /* If the sender of this packet is server and we are router we need to
1663 broadcast this packet to other routers in the network. Broadcast
1664 this list packet instead of multiple New ID packets. */
1665 if (!server->standalone && server->server_type == SILC_ROUTER &&
1666 sock->type == SILC_SOCKET_TYPE_SERVER &&
1667 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
1668 SILC_LOG_DEBUG(("Broadcasting received New ID List packet"));
1669 silc_server_packet_send(server, server->router->connection,
1671 packet->flags | SILC_PACKET_FLAG_BROADCAST,
1672 packet->buffer->data, packet->buffer->len, FALSE);
1675 /* Make copy of the original packet context, except for the actual
1676 data buffer, which we will here now fetch from the original buffer. */
1677 new_id = silc_packet_context_alloc();
1678 new_id->type = SILC_PACKET_NEW_ID;
1679 new_id->flags = packet->flags;
1680 new_id->src_id = packet->src_id;
1681 new_id->src_id_len = packet->src_id_len;
1682 new_id->src_id_type = packet->src_id_type;
1683 new_id->dst_id = packet->dst_id;
1684 new_id->dst_id_len = packet->dst_id_len;
1685 new_id->dst_id_type = packet->dst_id_type;
1687 idp = silc_buffer_alloc(256);
1688 new_id->buffer = idp;
1690 while (packet->buffer->len) {
1691 SILC_GET16_MSB(id_len, packet->buffer->data + 2);
1692 if ((id_len > packet->buffer->len) ||
1693 (id_len > idp->truelen))
1696 silc_buffer_pull_tail(idp, 4 + id_len);
1697 silc_buffer_put(idp, packet->buffer->data, 4 + id_len);
1699 /* Process the New ID */
1700 silc_server_new_id_real(server, sock, new_id, FALSE);
1702 silc_buffer_push_tail(idp, 4 + id_len);
1703 silc_buffer_pull(packet->buffer, 4 + id_len);
1706 silc_buffer_free(idp);
1710 /* Received New Channel packet. Information about new channels in the
1711 network are distributed using this packet. Save the information about
1712 the new channel. This usually comes from router but also normal server
1713 can send this to notify channels it has when it connects to us. */
1715 void silc_server_new_channel(SilcServer server,
1716 SilcSocketConnection sock,
1717 SilcPacketContext *packet)
1719 SilcChannelPayload payload;
1720 SilcChannelID *channel_id;
1727 SILC_LOG_DEBUG(("Processing New Channel"));
1729 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
1730 packet->src_id_type != SILC_ID_SERVER ||
1731 server->server_type == SILC_SERVER)
1734 /* Parse the channel payload */
1735 payload = silc_channel_payload_parse(packet->buffer);
1739 /* Get the channel ID */
1740 channel_id = silc_channel_get_id_parse(payload);
1742 silc_channel_payload_free(payload);
1746 channel_name = silc_channel_get_name(payload, &name_len);
1748 channel_name[255] = '\0';
1750 id = silc_channel_get_id(payload, &id_len);
1752 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
1753 /* Add the server to global list as it is coming from router. It
1754 cannot be our own channel as it is coming from router. */
1756 SILC_LOG_DEBUG(("New channel id(%s) from [Router] %s",
1757 silc_id_render(channel_id, SILC_ID_CHANNEL),
1760 silc_idlist_add_channel(server->global_list, strdup(channel_name),
1761 0, channel_id, server->router->connection,
1764 server->stat.channels++;
1766 /* The channel is coming from our server, thus it is in our cell
1767 we will add it to our local list. */
1768 SilcChannelEntry channel;
1771 SILC_LOG_DEBUG(("New channel id(%s) from [Server] %s",
1772 silc_id_render(channel_id, SILC_ID_CHANNEL),
1775 /* Check that we don't already have this channel */
1776 channel = silc_idlist_find_channel_by_name(server->local_list,
1777 channel_name, NULL);
1779 channel = silc_idlist_find_channel_by_name(server->global_list,
1780 channel_name, NULL);
1782 /* If the channel does not exist, then create it. We create the channel
1783 with the channel ID provided by the server. This creates a new
1784 key to the channel as well that we will send to the server. */
1786 channel = silc_server_create_new_channel_with_id(server, NULL, NULL,
1790 silc_channel_payload_free(payload);
1791 silc_free(channel_id);
1795 /* Send the new channel key to the server */
1796 chk = silc_channel_key_payload_encode(id_len, id,
1797 strlen(channel->channel_key->
1799 channel->channel_key->cipher->name,
1800 channel->key_len / 8,
1802 silc_server_packet_send(server, sock, SILC_PACKET_CHANNEL_KEY, 0,
1803 chk->data, chk->len, FALSE);
1804 silc_buffer_free(chk);
1807 /* The channel exist by that name, check whether the ID's match.
1808 If they don't then we'll force the server to use the ID we have.
1809 We also create a new key for the channel. */
1810 SilcBuffer users = NULL;
1813 channel_id = silc_id_dup(channel_id, SILC_ID_CHANNEL);
1815 if (SILC_ID_CHANNEL_COMPARE(channel_id, channel->id)) {
1816 /* They don't match, send CHANNEL_CHANGE notify to the server to
1817 force the ID change. */
1818 SILC_LOG_DEBUG(("Forcing the server to change Channel ID"));
1819 silc_server_send_notify_channel_change(server, sock, FALSE,
1822 SILC_ID_CHANNEL_LEN);
1825 /* If the mode is different from what we have then enforce the
1827 mode = silc_channel_get_mode(payload);
1828 if (channel->mode != mode) {
1829 SILC_LOG_DEBUG(("Forcing the server to change channel mode"));
1830 silc_server_send_notify_cmode(server, sock, FALSE, channel,
1831 channel->mode, server->id,
1832 SILC_ID_SERVER, SILC_ID_SERVER_LEN,
1833 channel->cipher, channel->hmac_name);
1836 /* Create new key for the channel and send it to the server and
1837 everybody else possibly on the channel. */
1839 if (!(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
1840 silc_server_create_channel_key(server, channel, 0);
1842 /* Send to the channel */
1843 silc_server_send_channel_key(server, sock, channel, FALSE);
1844 id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1845 id_len = SILC_ID_CHANNEL_LEN;
1847 /* Send to the server */
1848 chk = silc_channel_key_payload_encode(id_len, id,
1849 strlen(channel->channel_key->
1851 channel->channel_key->
1853 channel->key_len / 8,
1855 silc_server_packet_send(server, sock, SILC_PACKET_CHANNEL_KEY, 0,
1856 chk->data, chk->len, FALSE);
1857 silc_buffer_free(chk);
1861 silc_free(channel_id);
1863 /* Since the channel is coming from server and we also know about it
1864 then send the JOIN notify to the server so that it see's our
1865 users on the channel "joining" the channel. */
1866 silc_server_announce_get_channel_users(server, channel, &users);
1868 silc_buffer_push(users, users->data - users->head);
1869 silc_server_packet_send(server, sock,
1870 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
1871 users->data, users->len, FALSE);
1872 silc_buffer_free(users);
1877 silc_channel_payload_free(payload);
1880 /* Received New Channel List packet, list of New Channel List payloads inside
1881 one packet. Process the New Channel payloads one by one. */
1883 void silc_server_new_channel_list(SilcServer server,
1884 SilcSocketConnection sock,
1885 SilcPacketContext *packet)
1887 SilcPacketContext *new;
1891 SILC_LOG_DEBUG(("Processing New Channel List"));
1893 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
1894 packet->src_id_type != SILC_ID_SERVER ||
1895 server->server_type == SILC_SERVER)
1898 /* If the sender of this packet is server and we are router we need to
1899 broadcast this packet to other routers in the network. Broadcast
1900 this list packet instead of multiple New Channel packets. */
1901 if (!server->standalone && server->server_type == SILC_ROUTER &&
1902 sock->type == SILC_SOCKET_TYPE_SERVER &&
1903 !(packet->flags & SILC_PACKET_FLAG_BROADCAST)) {
1904 SILC_LOG_DEBUG(("Broadcasting received New Channel List packet"));
1905 silc_server_packet_send(server, server->router->connection,
1907 packet->flags | SILC_PACKET_FLAG_BROADCAST,
1908 packet->buffer->data, packet->buffer->len, FALSE);
1911 /* Make copy of the original packet context, except for the actual
1912 data buffer, which we will here now fetch from the original buffer. */
1913 new = silc_packet_context_alloc();
1914 new->type = SILC_PACKET_NEW_CHANNEL;
1915 new->flags = packet->flags;
1916 new->src_id = packet->src_id;
1917 new->src_id_len = packet->src_id_len;
1918 new->src_id_type = packet->src_id_type;
1919 new->dst_id = packet->dst_id;
1920 new->dst_id_len = packet->dst_id_len;
1921 new->dst_id_type = packet->dst_id_type;
1923 buffer = silc_buffer_alloc(512);
1924 new->buffer = buffer;
1926 while (packet->buffer->len) {
1927 SILC_GET16_MSB(len1, packet->buffer->data);
1928 if ((len1 > packet->buffer->len) ||
1929 (len1 > buffer->truelen))
1932 SILC_GET16_MSB(len2, packet->buffer->data + 2 + len1);
1933 if ((len2 > packet->buffer->len) ||
1934 (len2 > buffer->truelen))
1937 silc_buffer_pull_tail(buffer, 8 + len1 + len2);
1938 silc_buffer_put(buffer, packet->buffer->data, 8 + len1 + len2);
1940 /* Process the New Channel */
1941 silc_server_new_channel(server, sock, new);
1943 silc_buffer_push_tail(buffer, 8 + len1 + len2);
1944 silc_buffer_pull(packet->buffer, 8 + len1 + len2);
1947 silc_buffer_free(buffer);
1951 /* Received key agreement packet. This packet is never for us. It is to
1952 the client in the packet's destination ID. Sending of this sort of packet
1953 equals sending private message, ie. it is sent point to point from
1954 one client to another. */
1956 void silc_server_key_agreement(SilcServer server,
1957 SilcSocketConnection sock,
1958 SilcPacketContext *packet)
1960 SilcSocketConnection dst_sock;
1961 SilcIDListData idata;
1963 SILC_LOG_DEBUG(("Start"));
1965 if (packet->src_id_type != SILC_ID_CLIENT ||
1966 packet->dst_id_type != SILC_ID_CLIENT)
1969 if (!packet->dst_id)
1972 /* Get the route to the client */
1973 dst_sock = silc_server_get_client_route(server, packet->dst_id,
1974 packet->dst_id_len, NULL, &idata);
1978 /* Relay the packet */
1979 silc_server_relay_packet(server, dst_sock, idata->send_key,
1980 idata->hmac, packet, FALSE);
1983 /* Received connection auth request packet that is used during connection
1984 phase to resolve the mandatory authentication method. This packet can
1985 actually be received at anytime but usually it is used only during
1986 the connection authentication phase. Now, protocol says that this packet
1987 can come from client or server, however, we support only this coming
1988 from client and expect that server's always knows what authentication
1991 void silc_server_connection_auth_request(SilcServer server,
1992 SilcSocketConnection sock,
1993 SilcPacketContext *packet)
1995 SilcServerConfigSectionClientConnection *client = NULL;
1998 SilcAuthMethod auth_meth;
2000 SILC_LOG_DEBUG(("Start"));
2002 if (packet->src_id_type && packet->src_id_type != SILC_ID_CLIENT)
2005 /* Parse the payload */
2006 ret = silc_buffer_unformat(packet->buffer,
2007 SILC_STR_UI_SHORT(&conn_type),
2008 SILC_STR_UI_SHORT(NULL),
2013 if (conn_type != SILC_SOCKET_TYPE_CLIENT)
2016 /* Get the authentication method for the client */
2017 auth_meth = SILC_AUTH_NONE;
2018 client = silc_server_config_find_client_conn(server->config,
2022 client = silc_server_config_find_client_conn(server->config,
2026 auth_meth = client->auth_meth;
2028 /* Send it back to the client */
2029 silc_server_send_connection_auth_request(server, sock,
2034 /* Received REKEY packet. The sender of the packet wants to regenerate
2035 its session keys. This starts the REKEY protocol. */
2037 void silc_server_rekey(SilcServer server,
2038 SilcSocketConnection sock,
2039 SilcPacketContext *packet)
2041 SilcProtocol protocol;
2042 SilcServerRekeyInternalContext *proto_ctx;
2043 SilcIDListData idata = (SilcIDListData)sock->user_data;
2045 SILC_LOG_DEBUG(("Start"));
2047 /* Allocate internal protocol context. This is sent as context
2049 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
2050 proto_ctx->server = (void *)server;
2051 proto_ctx->sock = sock;
2052 proto_ctx->responder = TRUE;
2053 proto_ctx->pfs = idata->rekey->pfs;
2055 /* Perform rekey protocol. Will call the final callback after the
2056 protocol is over. */
2057 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
2058 &protocol, proto_ctx, silc_server_rekey_final);
2059 sock->protocol = protocol;
2061 if (proto_ctx->pfs == FALSE)
2062 /* Run the protocol */
2063 protocol->execute(server->timeout_queue, 0, protocol, sock->sock, 0, 0);