5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * Server packet routines to send packets.
25 #include "serverincludes.h"
26 #include "server_internal.h"
28 /* Routine that sends packet or marks packet to be sent. This is used
29 directly only in special cases. Normal cases should use
30 silc_server_packet_send. Returns < 0 error. */
32 int silc_server_packet_send_real(SilcServer server,
33 SilcSocketConnection sock,
38 /* If disconnecting, ignore the data */
39 if (SILC_IS_DISCONNECTING(sock))
42 /* If rekey protocol is active we must assure that all packets are
43 sent through packet queue. */
44 if (SILC_SERVER_IS_REKEY(sock))
47 /* If outbound data is already pending do not force send */
48 if (SILC_IS_OUTBUF_PENDING(sock))
52 ret = silc_packet_send(sock, force_send);
56 /* Mark that there is some outgoing data available for this connection.
57 This call sets the connection both for input and output (the input
58 is set always and this call keeps the input setting, actually).
59 Actual data sending is performed by silc_server_packet_process. */
60 SILC_SET_CONNECTION_FOR_OUTPUT(server->schedule, sock->sock);
62 /* Mark to socket that data is pending in outgoing buffer. This flag
63 is needed if new data is added to the buffer before the earlier
64 put data is sent to the network. */
65 SILC_SET_OUTBUF_PENDING(sock);
70 /* Assembles a new packet to be sent out to network. This doesn't actually
71 send the packet but creates the packet and fills the outgoing data
72 buffer and marks the packet ready to be sent to network. However, If
73 argument force_send is TRUE the packet is sent immediately and not put
74 to queue. Normal case is that the packet is not sent immediately. */
76 void silc_server_packet_send(SilcServer server,
77 SilcSocketConnection sock,
79 SilcPacketFlags flags,
85 SilcIdType dst_id_type = SILC_ID_NONE;
86 SilcIDListData idata = (SilcIDListData)sock->user_data;
91 /* If disconnecting, ignore the data */
92 if (SILC_IS_DISCONNECTING(sock))
95 /* If entry is disabled do not sent anything. */
96 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED)
99 /* Get data used in the packet sending, keys and stuff */
101 case SILC_SOCKET_TYPE_CLIENT:
102 if (sock->user_data) {
103 dst_id = ((SilcClientEntry)sock->user_data)->id;
104 dst_id_type = SILC_ID_CLIENT;
107 case SILC_SOCKET_TYPE_SERVER:
108 case SILC_SOCKET_TYPE_ROUTER:
109 if (sock->user_data) {
110 dst_id = ((SilcServerEntry)sock->user_data)->id;
111 dst_id_type = SILC_ID_SERVER;
118 silc_server_packet_send_dest(server, sock, type, flags, dst_id,
119 dst_id_type, data, data_len, force_send);
122 /* Assembles a new packet to be sent out to network. This doesn't actually
123 send the packet but creates the packet and fills the outgoing data
124 buffer and marks the packet ready to be sent to network. However, If
125 argument force_send is TRUE the packet is sent immediately and not put
126 to queue. Normal case is that the packet is not sent immediately.
127 Destination information is sent as argument for this function. */
129 void silc_server_packet_send_dest(SilcServer server,
130 SilcSocketConnection sock,
132 SilcPacketFlags flags,
134 SilcIdType dst_id_type,
139 SilcPacketContext packetdata;
140 const SilcBufferStruct packet;
141 SilcIDListData idata = (SilcIDListData)sock->user_data;
142 SilcCipher cipher = NULL;
143 SilcHmac hmac = NULL;
144 SilcUInt32 sequence = 0;
145 unsigned char *dst_id_data = NULL;
146 SilcUInt32 dst_id_len = 0;
149 /* If disconnecting, ignore the data */
150 if (SILC_IS_DISCONNECTING(sock))
153 /* If entry is disabled do not sent anything. */
154 if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED)
157 SILC_LOG_DEBUG(("Sending packet, type %d", type));
160 dst_id_data = silc_id_id2str(dst_id, dst_id_type);
161 dst_id_len = silc_id_get_len(dst_id, dst_id_type);
165 cipher = idata->send_key;
166 hmac = idata->hmac_send;
167 sequence = idata->psn_send++;
168 block_len = silc_cipher_get_block_len(cipher);
171 /* Set the packet context pointers */
172 packetdata.type = type;
173 packetdata.flags = flags;
174 packetdata.src_id = silc_id_id2str(server->id, server->id_type);
175 packetdata.src_id_len = silc_id_get_len(server->id, server->id_type);
176 packetdata.src_id_type = server->id_type;
177 packetdata.dst_id = dst_id_data;
178 packetdata.dst_id_len = dst_id_len;
179 packetdata.dst_id_type = dst_id_type;
180 data_len = SILC_PACKET_DATALEN(data_len, (SILC_PACKET_HEADER_LEN +
181 packetdata.src_id_len +
182 packetdata.dst_id_len));
183 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
184 packetdata.src_id_len + dst_id_len;
185 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen, block_len);
187 /* Create the outgoing packet */
188 if (!silc_packet_assemble(&packetdata, NULL, cipher, hmac, sock,
189 data, data_len, (const SilcBuffer)&packet)) {
190 SILC_LOG_ERROR(("Cannot assemble packet"));
194 /* Encrypt the packet */
195 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&packet, packet.len);
197 SILC_LOG_HEXDUMP(("Outgoing packet (%d), len %d", sequence, packet.len),
198 packet.data, packet.len);
200 /* Now actually send the packet */
201 silc_server_packet_send_real(server, sock, force_send);
204 if (packetdata.src_id)
205 silc_free(packetdata.src_id);
206 if (packetdata.dst_id)
207 silc_free(packetdata.dst_id);
210 /* Assembles a new packet to be sent out to network. This doesn't actually
211 send the packet but creates the packet and fills the outgoing data
212 buffer and marks the packet ready to be sent to network. However, If
213 argument force_send is TRUE the packet is sent immediately and not put
214 to queue. Normal case is that the packet is not sent immediately.
215 The source and destination information is sent as argument for this
218 void silc_server_packet_send_srcdest(SilcServer server,
219 SilcSocketConnection sock,
221 SilcPacketFlags flags,
223 SilcIdType src_id_type,
225 SilcIdType dst_id_type,
230 SilcPacketContext packetdata;
231 const SilcBufferStruct packet;
232 SilcIDListData idata;
233 SilcCipher cipher = NULL;
234 SilcHmac hmac = NULL;
235 SilcUInt32 sequence = 0;
236 unsigned char *dst_id_data = NULL;
237 SilcUInt32 dst_id_len = 0;
238 unsigned char *src_id_data = NULL;
239 SilcUInt32 src_id_len = 0;
242 SILC_LOG_DEBUG(("Sending packet, type %d", type));
244 /* Get data used in the packet sending, keys and stuff */
245 idata = (SilcIDListData)sock->user_data;
248 dst_id_data = silc_id_id2str(dst_id, dst_id_type);
249 dst_id_len = silc_id_get_len(dst_id, dst_id_type);
253 src_id_data = silc_id_id2str(src_id, src_id_type);
254 src_id_len = silc_id_get_len(src_id, src_id_type);
258 cipher = idata->send_key;
259 hmac = idata->hmac_send;
260 sequence = idata->psn_send++;
261 block_len = silc_cipher_get_block_len(cipher);
264 /* Set the packet context pointers */
265 packetdata.type = type;
266 packetdata.flags = flags;
267 packetdata.src_id = src_id_data;
268 packetdata.src_id_len = src_id_len;
269 packetdata.src_id_type = src_id_type;
270 packetdata.dst_id = dst_id_data;
271 packetdata.dst_id_len = dst_id_len;
272 packetdata.dst_id_type = dst_id_type;
273 data_len = SILC_PACKET_DATALEN(data_len, (SILC_PACKET_HEADER_LEN +
274 packetdata.src_id_len +
276 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
277 packetdata.src_id_len + dst_id_len;
278 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen, block_len);
280 /* Create the outgoing packet */
281 if (!silc_packet_assemble(&packetdata, NULL, cipher, hmac, sock, data,
282 data_len, (const SilcBuffer)&packet)) {
283 SILC_LOG_ERROR(("Cannot assemble packe"));
287 /* Encrypt the packet */
288 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&packet, packet.len);
290 SILC_LOG_HEXDUMP(("Outgoing packet (%d), len %d", sequence, packet.len),
291 packet.data, packet.len);
293 /* Now actually send the packet */
294 silc_server_packet_send_real(server, sock, force_send);
297 if (packetdata.src_id)
298 silc_free(packetdata.src_id);
299 if (packetdata.dst_id)
300 silc_free(packetdata.dst_id);
303 /* Broadcast received packet to our primary route. This function is used
304 by router to further route received broadcast packet. It is expected
305 that the broadcast flag from the packet is checked before calling this
306 function. This does not test or set the broadcast flag. */
308 void silc_server_packet_broadcast(SilcServer server,
309 SilcSocketConnection sock,
310 SilcPacketContext *packet)
312 SilcBuffer buffer = packet->buffer;
313 SilcIDListData idata;
316 SILC_LOG_DEBUG(("Broadcasting received broadcast packet"));
318 /* If the packet is originated from our primary route we are
319 not allowed to send the packet. */
320 id = silc_id_str2id(packet->src_id, packet->src_id_len, packet->src_id_type);
321 if (id && !SILC_ID_SERVER_COMPARE(id, server->router->id)) {
322 const SilcBufferStruct p;
324 idata = (SilcIDListData)sock->user_data;
326 silc_buffer_push(buffer, buffer->data - buffer->head);
327 if (!silc_packet_send_prepare(sock, 0, 0, buffer->len, idata->hmac_send,
328 (const SilcBuffer)&p)) {
329 SILC_LOG_ERROR(("Cannot send packet"));
333 silc_buffer_put((SilcBuffer)&p, buffer->data, buffer->len);
334 silc_packet_encrypt(idata->send_key, idata->hmac_send, idata->psn_send++,
335 (SilcBuffer)&p, p.len);
337 SILC_LOG_HEXDUMP(("Broadcasted packet (%d), len %d", idata->psn_send - 1,
338 p.len), p.data, p.len);
340 /* Now actually send the packet */
341 silc_server_packet_send_real(server, sock, TRUE);
346 SILC_LOG_DEBUG(("Will not broadcast to primary route since it is the "
347 "original sender of this packet"));
351 /* Routes received packet to `sock'. This is used to route the packets that
352 router receives but are not destined to it. */
354 void silc_server_packet_route(SilcServer server,
355 SilcSocketConnection sock,
356 SilcPacketContext *packet)
358 SilcBuffer buffer = packet->buffer;
359 const SilcBufferStruct p;
360 SilcIDListData idata;
362 SILC_LOG_DEBUG(("Routing received packet"));
364 idata = (SilcIDListData)sock->user_data;
366 silc_buffer_push(buffer, buffer->data - buffer->head);
367 if (!silc_packet_send_prepare(sock, 0, 0, buffer->len, idata->hmac_send,
368 (const SilcBuffer)&p)) {
369 SILC_LOG_ERROR(("Cannot send packet"));
372 silc_buffer_put((SilcBuffer)&p, buffer->data, buffer->len);
373 silc_packet_encrypt(idata->send_key, idata->hmac_send, idata->psn_send++,
374 (SilcBuffer)&p, p.len);
376 SILC_LOG_HEXDUMP(("Routed packet (%d), len %d", idata->psn_send - 1,
377 p.len), p.data, p.len);
379 /* Now actually send the packet */
380 silc_server_packet_send_real(server, sock, TRUE);
383 /* This routine can be used to send a packet to table of clients provided
384 in `clients'. If `route' is FALSE the packet is routed only to local
385 clients (for server locally connected, and for router local cell). */
387 void silc_server_packet_send_clients(SilcServer server,
388 SilcClientEntry *clients,
389 SilcUInt32 clients_count,
391 SilcPacketFlags flags,
397 SilcSocketConnection sock = NULL;
398 SilcClientEntry client = NULL;
399 SilcServerEntry *routed = NULL;
400 SilcUInt32 routed_count = 0;
404 SILC_LOG_DEBUG(("Sending packet to list of clients"));
406 /* Send to all clients in table */
407 for (i = 0; i < clients_count; i++) {
410 /* If client has router set it is not locally connected client and
411 we will route the message to the router set in the client. Though,
412 send locally connected server in all cases. */
413 if (server->server_type == SILC_ROUTER && client->router &&
414 ((!route && client->router->router == server->id_entry) || route)) {
416 /* Check if we have sent the packet to this route already */
417 for (k = 0; k < routed_count; k++)
418 if (routed[k] == client->router)
420 if (k < routed_count)
423 /* Route only once to router */
424 sock = (SilcSocketConnection)client->router->connection;
425 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
431 /* Send the packet */
432 silc_server_packet_send_dest(server, sock, type, flags,
433 client->router->id, SILC_ID_SERVER,
434 data, data_len, force_send);
436 /* Mark this route routed already */
437 routed = silc_realloc(routed, sizeof(*routed) * (routed_count + 1));
438 routed[routed_count++] = client->router;
445 /* Send to locally connected client */
446 sock = (SilcSocketConnection)client->connection;
447 silc_server_packet_send_dest(server, sock, type, flags,
448 client->id, SILC_ID_CLIENT,
449 data, data_len, force_send);
455 /* Internal routine to actually create the channel packet and send it
456 to network. This is common function in channel message sending. If
457 `channel_message' is TRUE this encrypts the message as it is strictly
458 a channel message. If FALSE normal encryption process is used. */
461 silc_server_packet_send_to_channel_real(SilcServer server,
462 SilcSocketConnection sock,
463 SilcPacketContext *packet,
469 bool channel_message,
473 const SilcBufferStruct p;
478 data_len = SILC_PACKET_DATALEN(data_len, (SILC_PACKET_HEADER_LEN +
480 packet->dst_id_len));
481 packet->truelen = data_len + SILC_PACKET_HEADER_LEN +
482 packet->src_id_len + packet->dst_id_len;
484 block_len = cipher ? silc_cipher_get_block_len(cipher) : 0;
486 packet->padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
488 packet->dst_id_len), block_len);
490 packet->padlen = SILC_PACKET_PADLEN(packet->truelen, block_len);
492 /* Put the data to buffer, assemble and encrypt the packet. The packet
493 is encrypted with normal session key shared with the client, unless
494 the `channel_message' is TRUE. */
495 if (!silc_packet_assemble(packet, NULL, cipher, hmac, sock, data,
496 data_len, (const SilcBuffer)&p)) {
497 SILC_LOG_ERROR(("Cannot assemble packet"));
502 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p,
503 SILC_PACKET_HEADER_LEN + packet->src_id_len +
504 packet->dst_id_len + packet->padlen);
506 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p, p.len);
508 SILC_LOG_HEXDUMP(("Channel packet (%d), len %d", sequence, p.len),
511 /* Now actually send the packet */
512 silc_server_packet_send_real(server, sock, force_send);
515 /* This routine is used by the server to send packets to channel. The
516 packet sent with this function is distributed to all clients on
517 the channel. Usually this is used to send notify messages to the
518 channel, things like notify about new user joining to the channel.
519 If `route' is FALSE then the packet is sent only locally and will not
520 be routed anywhere (for router locally means cell wide). If `sender'
521 is provided then the packet is not sent to that connection since it
522 originally came from it. If `send_to_clients' is FALSE then the
523 packet is not sent clients, only servers. */
525 void silc_server_packet_send_to_channel(SilcServer server,
526 SilcSocketConnection sender,
527 SilcChannelEntry channel,
534 SilcSocketConnection sock = NULL;
535 SilcPacketContext packetdata;
536 SilcClientEntry client = NULL;
537 SilcServerEntry *routed = NULL;
538 SilcChannelClientEntry chl;
539 SilcHashTableList htl;
540 SilcIDListData idata;
541 SilcUInt32 routed_count = 0;
545 /* This doesn't send channel message packets */
546 assert(type != SILC_PACKET_CHANNEL_MESSAGE);
548 SILC_LOG_DEBUG(("Sending packet to channel"));
550 /* Set the packet context pointers. */
551 packetdata.flags = 0;
552 packetdata.type = type;
553 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
554 packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
555 packetdata.src_id_type = SILC_ID_SERVER;
556 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
557 packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
558 packetdata.dst_id_type = SILC_ID_CHANNEL;
560 /* If there are global users in the channel we will send the message
561 first to our router for further routing. */
562 if (route && server->server_type != SILC_ROUTER && !server->standalone &&
563 channel->global_users) {
564 SilcServerEntry router;
566 /* Get data used in packet header encryption, keys and stuff. */
567 router = server->router;
568 sock = (SilcSocketConnection)router->connection;
569 idata = (SilcIDListData)router;
571 if (sock != sender) {
572 SILC_LOG_DEBUG(("Sending packet to router for routing"));
574 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
578 data, data_len, FALSE,
583 routed = silc_calloc(silc_hash_table_count(channel->user_list),
586 /* Send the message to clients on the channel's client list. */
587 silc_hash_table_list(channel->user_list, &htl);
588 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
589 client = chl->client;
593 /* If client has router set it is not locally connected client and
594 we will route the message to the router set in the client. Though,
595 send locally connected server in all cases. */
596 if (server->server_type == SILC_ROUTER && client->router &&
597 ((!route && client->router->router == server->id_entry) || route)) {
599 /* Check if we have sent the packet to this route already */
600 for (k = 0; k < routed_count; k++)
601 if (routed[k] == client->router)
603 if (k < routed_count)
606 /* Get data used in packet header encryption, keys and stuff. */
607 sock = (SilcSocketConnection)client->router->connection;
608 idata = (SilcIDListData)client->router;
610 if (sender && sock == sender)
613 /* Route only once to router. Protocol prohibits sending channel
614 messages to more than one router. */
615 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
621 /* Send the packet */
622 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
626 data, data_len, FALSE,
629 /* Mark this route routed already */
630 routed[routed_count++] = client->router;
637 /* Send to locally connected client */
639 /* Get data used in packet header encryption, keys and stuff. */
640 sock = (SilcSocketConnection)client->connection;
641 idata = (SilcIDListData)client;
643 if (!sock || (sender && sock == sender))
646 /* Send the packet */
647 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
651 data, data_len, FALSE,
655 silc_hash_table_list_reset(&htl);
657 silc_free(packetdata.src_id);
658 silc_free(packetdata.dst_id);
661 /* This checks whether the relayed packet came from router. If it did
662 then we'll need to encrypt it with the channel key. This is called
663 from the silc_server_packet_relay_to_channel. */
666 silc_server_packet_relay_to_channel_encrypt(SilcServer server,
667 SilcSocketConnection sock,
668 SilcChannelEntry channel,
670 unsigned int data_len)
672 /* If we are router and the packet came from router and private key
673 has not been set for the channel then we must encrypt the packet
674 as it was decrypted with the session key shared between us and the
675 router which sent it. This is so, because cells does not share the
677 if (server->server_type == SILC_ROUTER &&
678 sock->type == SILC_SOCKET_TYPE_ROUTER &&
679 !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY) &&
680 channel->channel_key) {
681 SilcUInt32 mac_len = silc_hmac_len(channel->hmac);
682 SilcUInt32 iv_len = silc_cipher_get_block_len(channel->channel_key);
684 if (data_len <= mac_len + iv_len) {
685 SILC_LOG_WARNING(("Corrupted channel message, cannot relay it"));
689 memcpy(channel->iv, data + (data_len - iv_len), iv_len);
690 silc_channel_message_payload_encrypt(data, data_len - iv_len - mac_len,
691 data_len, channel->iv, iv_len,
692 channel->channel_key, channel->hmac);
698 /* This routine is explicitly used to relay messages to some channel.
699 Packets sent with this function we have received earlier and are
700 totally encrypted. This just sends the packet to all clients on
701 the channel. If the sender of the packet is someone on the channel
702 the message will not be sent to that client. The SILC Packet header
703 is encrypted with the session key shared between us and the client.
704 MAC is also computed before encrypting the header. Rest of the
705 packet will be untouched. */
707 void silc_server_packet_relay_to_channel(SilcServer server,
708 SilcSocketConnection sender_sock,
709 SilcChannelEntry channel,
711 SilcIdType sender_type,
712 SilcClientEntry sender_entry,
717 SilcSocketConnection sock = NULL;
718 SilcPacketContext packetdata;
719 SilcClientEntry client = NULL;
720 SilcServerEntry *routed = NULL;
721 SilcChannelClientEntry chl;
722 SilcUInt32 routed_count = 0;
723 SilcIDListData idata;
724 SilcHashTableList htl;
728 SILC_LOG_DEBUG(("Relaying packet to channel"));
730 /* This encrypts the packet, if needed. It will be encrypted if
731 it came from the router thus it needs to be encrypted with the
732 channel key. If the channel key does not exist, then we know we
733 don't have a single local user on the channel. */
734 if (!silc_server_packet_relay_to_channel_encrypt(server, sender_sock,
739 /* Set the packet context pointers. */
740 packetdata.flags = 0;
741 packetdata.type = SILC_PACKET_CHANNEL_MESSAGE;
742 packetdata.src_id = silc_id_id2str(sender_id, sender_type);
743 packetdata.src_id_len = silc_id_get_len(sender_id, sender_type);
744 packetdata.src_id_type = sender_type;
745 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
746 packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
747 packetdata.dst_id_type = SILC_ID_CHANNEL;
749 /* If there are global users in the channel we will send the message
750 first to our router for further routing. */
751 if (server->server_type != SILC_ROUTER && !server->standalone &&
752 channel->global_users) {
753 SilcServerEntry router = server->router;
755 /* Check that the sender is not our router. */
756 if (sender_sock != (SilcSocketConnection)router->connection) {
758 /* Get data used in packet header encryption, keys and stuff. */
759 sock = (SilcSocketConnection)router->connection;
760 idata = (SilcIDListData)router;
762 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
764 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
768 data, data_len, TRUE,
773 routed = silc_calloc(silc_hash_table_count(channel->user_list),
776 /* Assure we won't route the message back to the sender's way. */
777 if (sender_entry->router)
778 routed[routed_count++] = sender_entry->router;
780 /* Send the message to clients on the channel's client list. */
781 silc_hash_table_list(channel->user_list, &htl);
782 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
783 client = chl->client;
784 if (!client || client == sender_entry)
787 /* If the client has set router it means that it is not locally
788 connected client and we will route the packet further. */
789 if (server->server_type == SILC_ROUTER && client->router) {
791 /* Check if we have sent the packet to this route already */
792 for (k = 0; k < routed_count; k++)
793 if (routed[k] == client->router)
795 if (k < routed_count)
798 /* Get data used in packet header encryption, keys and stuff. */
799 sock = (SilcSocketConnection)client->router->connection;
800 idata = (SilcIDListData)client->router;
802 /* Check if the sender socket is the same as this client's router
804 if (sender_sock && sock == sender_sock)
807 SILC_LOG_DEBUG(("Relaying packet to client ID(%s) %s (%s)",
808 silc_id_render(client->id, SILC_ID_CLIENT),
809 sock->hostname, sock->ip));
811 /* Mark this route routed already. */
812 routed[routed_count++] = client->router;
814 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
815 /* The remote connection is router then we'll decrypt the
816 channel message and re-encrypt it with the session key shared
817 between us and the remote router. This is done because the
818 channel keys are cell specific and we have different channel
819 key than the remote router has. */
821 /* Route only once to router. Protocol prohibits sending channel
822 messages to more than one router. */
827 SILC_LOG_DEBUG(("Remote is router, encrypt with session key"));
829 /* If private key mode is not set then decrypt the packet
831 if (!(channel->mode & SILC_CHANNEL_MODE_PRIVKEY) &&
832 channel->channel_key) {
833 unsigned char tmp[SILC_PACKET_MAX_LEN];
835 if (data_len > SILC_PACKET_MAX_LEN)
836 data_len = SILC_PACKET_MAX_LEN;
837 memcpy(tmp, data, data_len);
839 /* Decrypt the channel message (we don't check the MAC) */
840 silc_channel_message_payload_decrypt(tmp, data_len,
841 channel->channel_key, NULL);
843 /* Now re-encrypt and send it to the router */
844 silc_server_packet_send_srcdest(server, sock,
845 SILC_PACKET_CHANNEL_MESSAGE, 0,
846 sender_id, sender_type,
847 channel->id, SILC_ID_CHANNEL,
848 tmp, data_len, force_send);
850 /* Private key mode is set, we don't have the channel key, so
851 just re-encrypt the entire packet and send it to the router. */
852 silc_server_packet_send_srcdest(server, sock,
853 SILC_PACKET_CHANNEL_MESSAGE, 0,
854 sender_id, sender_type,
855 channel->id, SILC_ID_CHANNEL,
856 data, data_len, force_send);
859 /* Send the packet to normal server */
860 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
864 data, data_len, TRUE,
874 /* Get data used in packet header encryption, keys and stuff. */
875 sock = (SilcSocketConnection)client->connection;
876 idata = (SilcIDListData)client;
878 if (!sock || (sender_sock && sock == sender_sock))
881 SILC_LOG_DEBUG(("Sending packet to client ID(%s) %s (%s)",
882 silc_id_render(client->id, SILC_ID_CLIENT),
883 sock->hostname, sock->ip));
885 /* Send the packet */
886 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
890 data, data_len, TRUE,
894 silc_hash_table_list_reset(&htl);
896 silc_free(packetdata.src_id);
897 silc_free(packetdata.dst_id);
900 /* This function is used to send packets strictly to all local clients
901 on a particular channel. This is used for example to distribute new
902 channel key to all our locally connected clients on the channel.
903 The packets are always encrypted with the session key shared between
904 the client, this means these are not _to the channel_ but _to the client_
907 void silc_server_packet_send_local_channel(SilcServer server,
908 SilcChannelEntry channel,
910 SilcPacketFlags flags,
915 SilcChannelClientEntry chl;
916 SilcHashTableList htl;
917 SilcSocketConnection sock = NULL;
919 SILC_LOG_DEBUG(("Start"));
921 /* Send the message to clients on the channel's client list. */
922 silc_hash_table_list(channel->user_list, &htl);
923 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
924 if (chl->client && !chl->client->router) {
925 sock = (SilcSocketConnection)chl->client->connection;
927 /* Send the packet to the client */
928 silc_server_packet_send_dest(server, sock, type, flags, chl->client->id,
929 SILC_ID_CLIENT, data, data_len,
933 silc_hash_table_list_reset(&htl);
936 /* Routine used to send (relay, route) private messages to some destination.
937 If the private message key does not exist then the message is re-encrypted,
938 otherwise we just pass it along. This really is not used to send new
939 private messages (as server does not send them) but to relay received
942 void silc_server_send_private_message(SilcServer server,
943 SilcSocketConnection dst_sock,
947 SilcPacketContext *packet)
949 SilcBuffer buffer = packet->buffer;
950 const SilcBufferStruct p;
952 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
953 + packet->dst_id_len + packet->padlen);
954 if (!silc_packet_send_prepare(dst_sock, 0, 0, buffer->len, hmac,
955 (const SilcBuffer)&p)) {
956 SILC_LOG_ERROR(("Cannot send packet"));
959 silc_buffer_put((SilcBuffer)&p, buffer->data, buffer->len);
961 /* Re-encrypt and send if private messge key does not exist */
962 if (!(packet->flags & SILC_PACKET_FLAG_PRIVMSG_KEY)) {
963 /* Re-encrypt packet */
964 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p, buffer->len);
966 /* Key exist so encrypt just header and send it */
967 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p,
968 SILC_PACKET_HEADER_LEN + packet->src_id_len +
969 packet->dst_id_len + packet->padlen);
972 /* Send the packet */
973 silc_server_packet_send_real(server, dst_sock, FALSE);
976 /* Sends current motd to client */
978 void silc_server_send_motd(SilcServer server,
979 SilcSocketConnection sock)
981 char *motd, *motd_file = NULL;
985 motd_file = server->config->server_info->motd_file;
988 motd = silc_file_readfile(motd_file, &motd_len);
992 silc_server_send_notify(server, sock, FALSE, SILC_NOTIFY_TYPE_MOTD, 1,
998 /* Sends error message. Error messages may or may not have any
1001 void silc_server_send_error(SilcServer server,
1002 SilcSocketConnection sock,
1003 const char *fmt, ...)
1006 unsigned char buf[4096];
1008 memset(buf, 0, sizeof(buf));
1010 vsprintf(buf, fmt, ap);
1013 silc_server_packet_send(server, sock, SILC_PACKET_ERROR, 0,
1014 buf, strlen(buf), FALSE);
1017 /* Sends notify message. If format is TRUE the variable arguments are
1018 formatted and the formatted string is sent as argument payload. If it is
1019 FALSE then each argument is sent as separate argument and their format
1020 in the argument list must be { argument data, argument length }. */
1022 void silc_server_send_notify(SilcServer server,
1023 SilcSocketConnection sock,
1025 SilcNotifyType type,
1026 SilcUInt32 argc, ...)
1033 packet = silc_notify_payload_encode(type, argc, ap);
1034 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
1035 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1036 packet->data, packet->len, FALSE);
1038 /* Send to backup routers if this is being broadcasted to primary
1040 if (server->router && server->router->connection &&
1041 sock == server->router->connection && broadcast)
1042 silc_server_backup_send(server, NULL, SILC_PACKET_NOTIFY, 0,
1043 packet->data, packet->len, FALSE, TRUE);
1045 silc_buffer_free(packet);
1049 /* Sends notify message and gets the arguments from the `args' Argument
1052 void silc_server_send_notify_args(SilcServer server,
1053 SilcSocketConnection sock,
1055 SilcNotifyType type,
1061 packet = silc_notify_payload_encode_args(type, argc, args);
1062 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
1063 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1064 packet->data, packet->len, FALSE);
1065 silc_buffer_free(packet);
1068 /* Send CHANNEL_CHANGE notify type. This tells the receiver to replace the
1069 `old_id' with the `new_id'. */
1071 void silc_server_send_notify_channel_change(SilcServer server,
1072 SilcSocketConnection sock,
1074 SilcChannelID *old_id,
1075 SilcChannelID *new_id)
1077 SilcBuffer idp1, idp2;
1079 idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CHANNEL);
1080 idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CHANNEL);
1082 silc_server_send_notify(server, sock, broadcast,
1083 SILC_NOTIFY_TYPE_CHANNEL_CHANGE,
1084 2, idp1->data, idp1->len, idp2->data, idp2->len);
1085 silc_buffer_free(idp1);
1086 silc_buffer_free(idp2);
1089 /* Send NICK_CHANGE notify type. This tells the receiver to replace the
1090 `old_id' with the `new_id'. */
1092 void silc_server_send_notify_nick_change(SilcServer server,
1093 SilcSocketConnection sock,
1095 SilcClientID *old_id,
1096 SilcClientID *new_id,
1097 const char *nickname)
1099 SilcBuffer idp1, idp2;
1101 idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CLIENT);
1102 idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CLIENT);
1104 silc_server_send_notify(server, sock, broadcast,
1105 SILC_NOTIFY_TYPE_NICK_CHANGE,
1106 3, idp1->data, idp1->len, idp2->data, idp2->len,
1107 nickname, nickname ? strlen(nickname) : 0);
1108 silc_buffer_free(idp1);
1109 silc_buffer_free(idp2);
1112 /* Sends JOIN notify type. This tells that new client by `client_id' ID
1113 has joined to the `channel'. */
1115 void silc_server_send_notify_join(SilcServer server,
1116 SilcSocketConnection sock,
1118 SilcChannelEntry channel,
1119 SilcClientID *client_id)
1121 SilcBuffer idp1, idp2;
1123 idp1 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1124 idp2 = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1125 silc_server_send_notify(server, sock, broadcast, SILC_NOTIFY_TYPE_JOIN,
1126 2, idp1->data, idp1->len,
1127 idp2->data, idp2->len);
1128 silc_buffer_free(idp1);
1129 silc_buffer_free(idp2);
1132 /* Sends LEAVE notify type. This tells that `client_id' has left the
1133 `channel'. The Notify packet is always destined to the channel. */
1135 void silc_server_send_notify_leave(SilcServer server,
1136 SilcSocketConnection sock,
1138 SilcChannelEntry channel,
1139 SilcClientID *client_id)
1143 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1144 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1145 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_LEAVE,
1146 1, idp->data, idp->len);
1147 silc_buffer_free(idp);
1150 /* Sends CMODE_CHANGE notify type. This tells that `client_id' changed the
1151 `channel' mode to `mode. The Notify packet is always destined to
1154 void silc_server_send_notify_cmode(SilcServer server,
1155 SilcSocketConnection sock,
1157 SilcChannelEntry channel,
1158 SilcUInt32 mode_mask,
1159 void *id, SilcIdType id_type,
1160 char *cipher, char *hmac,
1164 unsigned char mode[4];
1166 idp = silc_id_payload_encode((void *)id, id_type);
1167 SILC_PUT32_MSB(mode_mask, mode);
1169 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1170 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_CMODE_CHANGE,
1171 5, idp->data, idp->len,
1173 cipher, cipher ? strlen(cipher) : 0,
1174 hmac, hmac ? strlen(hmac) : 0,
1175 passphrase, passphrase ?
1176 strlen(passphrase) : 0);
1177 silc_buffer_free(idp);
1180 /* Sends CUMODE_CHANGE notify type. This tells that `client_id' changed the
1181 `target' client's mode on `channel'. The notify packet is always
1182 destined to the channel. */
1184 void silc_server_send_notify_cumode(SilcServer server,
1185 SilcSocketConnection sock,
1187 SilcChannelEntry channel,
1188 SilcUInt32 mode_mask,
1189 void *id, SilcIdType id_type,
1190 SilcClientID *target)
1192 SilcBuffer idp1, idp2;
1193 unsigned char mode[4];
1195 idp1 = silc_id_payload_encode((void *)id, id_type);
1196 idp2 = silc_id_payload_encode((void *)target, SILC_ID_CLIENT);
1197 SILC_PUT32_MSB(mode_mask, mode);
1199 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1201 SILC_NOTIFY_TYPE_CUMODE_CHANGE, 3,
1202 idp1->data, idp1->len,
1204 idp2->data, idp2->len);
1205 silc_buffer_free(idp1);
1206 silc_buffer_free(idp2);
1209 /* Sends SIGNOFF notify type. This tells that `client_id' client has
1210 left SILC network. This function is used only between server and router
1211 traffic. This is not used to send the notify to the channel for
1212 client. The `message may be NULL. */
1214 void silc_server_send_notify_signoff(SilcServer server,
1215 SilcSocketConnection sock,
1217 SilcClientID *client_id,
1218 const char *message)
1222 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1223 silc_server_send_notify(server, sock, broadcast,
1224 SILC_NOTIFY_TYPE_SIGNOFF,
1225 message ? 2 : 1, idp->data, idp->len,
1226 message, message ? strlen(message): 0);
1227 silc_buffer_free(idp);
1230 /* Sends TOPIC_SET notify type. This tells that `id' changed
1231 the `channel's topic to `topic'. The Notify packet is always destined
1232 to the channel. This function is used to send the topic set notifies
1235 void silc_server_send_notify_topic_set(SilcServer server,
1236 SilcSocketConnection sock,
1238 SilcChannelEntry channel,
1239 void *id, SilcIdType id_type,
1244 idp = silc_id_payload_encode(id, id_type);
1245 silc_server_send_notify_dest(server, sock, broadcast,
1246 (void *)channel->id, SILC_ID_CHANNEL,
1247 SILC_NOTIFY_TYPE_TOPIC_SET,
1249 idp->data, idp->len,
1250 topic, topic ? strlen(topic) : 0);
1251 silc_buffer_free(idp);
1254 /* Send KICKED notify type. This tells that the `client_id' on `channel'
1255 was kicked off the channel. The `comment' may indicate the reason
1256 for the kicking. This function is used only between server and router
1259 void silc_server_send_notify_kicked(SilcServer server,
1260 SilcSocketConnection sock,
1262 SilcChannelEntry channel,
1263 SilcClientID *client_id,
1264 SilcClientID *kicker,
1270 idp1 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1271 idp2 = silc_id_payload_encode((void *)kicker, SILC_ID_CLIENT);
1272 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1273 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_KICKED, 3,
1274 idp1->data, idp1->len,
1275 comment, comment ? strlen(comment) : 0,
1276 idp2->data, idp2->len);
1277 silc_buffer_free(idp1);
1278 silc_buffer_free(idp2);
1281 /* Send KILLED notify type. This tells that the `client_id' client was
1282 killed from the network. The `comment' may indicate the reason
1285 void silc_server_send_notify_killed(SilcServer server,
1286 SilcSocketConnection sock,
1288 SilcClientID *client_id,
1290 SilcClientID *killer)
1295 idp1 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1296 idp2 = silc_id_payload_encode((void *)killer, SILC_ID_CLIENT);
1297 silc_server_send_notify_dest(server, sock, broadcast, (void *)client_id,
1298 SILC_ID_CLIENT, SILC_NOTIFY_TYPE_KILLED,
1299 3, idp1->data, idp1->len,
1300 comment, comment ? strlen(comment) : 0,
1301 idp2->data, idp2->len);
1302 silc_buffer_free(idp1);
1303 silc_buffer_free(idp2);
1306 /* Sends UMODE_CHANGE notify type. This tells that `client_id' client's
1307 user mode in the SILC Network was changed. This function is used to
1308 send the packet between routers as broadcast packet. */
1310 void silc_server_send_notify_umode(SilcServer server,
1311 SilcSocketConnection sock,
1313 SilcClientID *client_id,
1314 SilcUInt32 mode_mask)
1317 unsigned char mode[4];
1319 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1320 SILC_PUT32_MSB(mode_mask, mode);
1322 silc_server_send_notify(server, sock, broadcast,
1323 SILC_NOTIFY_TYPE_UMODE_CHANGE, 2,
1324 idp->data, idp->len,
1326 silc_buffer_free(idp);
1329 /* Sends BAN notify type. This tells that ban has been either `add'ed
1330 or `del'eted on the `channel. This function is used to send the packet
1331 between routers as broadcast packet. */
1333 void silc_server_send_notify_ban(SilcServer server,
1334 SilcSocketConnection sock,
1336 SilcChannelEntry channel,
1337 char *add, char *del)
1341 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1342 silc_server_send_notify(server, sock, broadcast,
1343 SILC_NOTIFY_TYPE_BAN, 3,
1344 idp->data, idp->len,
1345 add, add ? strlen(add) : 0,
1346 del, del ? strlen(del) : 0);
1347 silc_buffer_free(idp);
1350 /* Sends INVITE notify type. This tells that invite has been either `add'ed
1351 or `del'eted on the `channel. The sender of the invite is the `client_id'.
1352 This function is used to send the packet between routers as broadcast
1355 void silc_server_send_notify_invite(SilcServer server,
1356 SilcSocketConnection sock,
1358 SilcChannelEntry channel,
1359 SilcClientID *client_id,
1360 char *add, char *del)
1362 SilcBuffer idp, idp2;
1364 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1365 idp2 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1366 silc_server_send_notify(server, sock, broadcast,
1367 SILC_NOTIFY_TYPE_INVITE, 5,
1368 idp->data, idp->len,
1369 channel->channel_name, strlen(channel->channel_name),
1370 idp2->data, idp2->len,
1371 add, add ? strlen(add) : 0,
1372 del, del ? strlen(del) : 0);
1373 silc_buffer_free(idp);
1374 silc_buffer_free(idp2);
1377 /* Sends notify message destined to specific entity. */
1379 void silc_server_send_notify_dest(SilcServer server,
1380 SilcSocketConnection sock,
1383 SilcIdType dest_id_type,
1384 SilcNotifyType type,
1385 SilcUInt32 argc, ...)
1392 packet = silc_notify_payload_encode(type, argc, ap);
1393 silc_server_packet_send_dest(server, sock, SILC_PACKET_NOTIFY,
1394 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1395 dest_id, dest_id_type,
1396 packet->data, packet->len, FALSE);
1397 silc_buffer_free(packet);
1401 /* Sends notify message to a channel. The notify message sent is
1402 distributed to all clients on the channel. If `route_notify' is TRUE
1403 then the notify may be routed to primary route or to some other routers.
1404 If FALSE it is assured that the notify is sent only locally. If `sender'
1405 is provided then the packet is not sent to that connection since it
1406 originally came from it. */
1408 void silc_server_send_notify_to_channel(SilcServer server,
1409 SilcSocketConnection sender,
1410 SilcChannelEntry channel,
1412 SilcNotifyType type,
1413 SilcUInt32 argc, ...)
1420 packet = silc_notify_payload_encode(type, argc, ap);
1421 silc_server_packet_send_to_channel(server, sender, channel,
1422 SILC_PACKET_NOTIFY, route_notify,
1423 packet->data, packet->len, FALSE);
1424 silc_buffer_free(packet);
1428 /* Send notify message to all channels the client has joined. It is quaranteed
1429 that the message is sent only once to a client (ie. if a client is joined
1430 on two same channel it will receive only one notify message). Also, this
1431 sends only to local clients (locally connected if we are server, and to
1432 local servers if we are router). If `sender' is provided the packet is
1433 not sent to that client at all. */
1435 void silc_server_send_notify_on_channels(SilcServer server,
1436 SilcClientEntry sender,
1437 SilcClientEntry client,
1438 SilcNotifyType type,
1439 SilcUInt32 argc, ...)
1442 SilcSocketConnection sock = NULL;
1443 SilcPacketContext packetdata;
1445 SilcClientEntry *sent_clients = NULL;
1446 SilcUInt32 sent_clients_count = 0;
1447 SilcServerEntry *routed = NULL;
1448 SilcUInt32 routed_count = 0;
1449 SilcHashTableList htl, htl2;
1450 SilcChannelEntry channel;
1451 SilcChannelClientEntry chl, chl2;
1452 SilcIDListData idata;
1454 unsigned char *data;
1455 SilcUInt32 data_len;
1456 bool force_send = FALSE;
1459 SILC_LOG_DEBUG(("Start"));
1461 if (!silc_hash_table_count(client->channels))
1465 packet = silc_notify_payload_encode(type, argc, ap);
1466 data = packet->data;
1467 data_len = packet->len;
1469 /* Set the packet context pointers. */
1470 packetdata.flags = 0;
1471 packetdata.type = SILC_PACKET_NOTIFY;
1472 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
1473 packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1474 packetdata.src_id_type = SILC_ID_SERVER;
1476 silc_hash_table_list(client->channels, &htl);
1477 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
1478 channel = chl->channel;
1480 /* Send the message to all clients on the channel's client list. */
1481 silc_hash_table_list(channel->user_list, &htl2);
1482 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
1485 if (sender && c == sender)
1488 /* Check if we have sent the packet to this client already */
1489 for (k = 0; k < sent_clients_count; k++)
1490 if (sent_clients[k] == c)
1492 if (k < sent_clients_count)
1495 /* If we are router and if this client has router set it is not
1496 locally connected client and we will route the message to the
1497 router set in the client. */
1498 if (c && c->router && server->server_type == SILC_ROUTER) {
1499 /* Check if we have sent the packet to this route already */
1500 for (k = 0; k < routed_count; k++)
1501 if (routed[k] == c->router)
1503 if (k < routed_count)
1506 /* Get data used in packet header encryption, keys and stuff. */
1507 sock = (SilcSocketConnection)c->router->connection;
1508 idata = (SilcIDListData)c->router;
1511 SILC_LOG_DEBUG(("*****************"));
1512 SILC_LOG_DEBUG(("client->router->id %s",
1513 silc_id_render(c->router->id, SILC_ID_SERVER)));
1514 SILC_LOG_DEBUG(("client->router->connection->user_data->id %s",
1515 silc_id_render(((SilcServerEntry)sock->user_data)->id, SILC_ID_SERVER)));
1518 packetdata.dst_id = silc_id_id2str(c->router->id, SILC_ID_SERVER);
1519 packetdata.dst_id_len = silc_id_get_len(c->router->id, SILC_ID_SERVER);
1520 packetdata.dst_id_type = SILC_ID_SERVER;
1522 /* Send the packet */
1523 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1527 data, data_len, FALSE,
1530 silc_free(packetdata.dst_id);
1532 /* We want to make sure that the packet is routed to same router
1533 only once. Mark this route as sent route. */
1534 routed = silc_realloc(routed, sizeof(*routed) * (routed_count + 1));
1535 routed[routed_count++] = c->router;
1542 /* Send to locally connected client */
1545 /* Get data used in packet header encryption, keys and stuff. */
1546 sock = (SilcSocketConnection)c->connection;
1547 idata = (SilcIDListData)c;
1552 packetdata.dst_id = silc_id_id2str(c->id, SILC_ID_CLIENT);
1553 packetdata.dst_id_len = silc_id_get_len(c->id, SILC_ID_CLIENT);
1554 packetdata.dst_id_type = SILC_ID_CLIENT;
1556 /* Send the packet */
1557 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1561 data, data_len, FALSE,
1564 silc_free(packetdata.dst_id);
1566 /* Make sure that we send the notify only once per client. */
1567 sent_clients = silc_realloc(sent_clients, sizeof(*sent_clients) *
1568 (sent_clients_count + 1));
1569 sent_clients[sent_clients_count++] = c;
1572 silc_hash_table_list_reset(&htl2);
1575 silc_hash_table_list_reset(&htl);
1577 silc_free(sent_clients);
1578 silc_free(packetdata.src_id);
1579 silc_buffer_free(packet);
1583 /* Sends New ID Payload to remote end. The packet is used to distribute
1584 information about new registered clients, servers, channel etc. usually
1585 to routers so that they can keep these information up to date.
1586 If the argument `broadcast' is TRUE then the packet is sent as
1587 broadcast packet. */
1589 void silc_server_send_new_id(SilcServer server,
1590 SilcSocketConnection sock,
1592 void *id, SilcIdType id_type,
1597 SILC_LOG_DEBUG(("Start"));
1599 idp = silc_id_payload_encode(id, id_type);
1600 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID,
1601 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1602 idp->data, idp->len, FALSE);
1604 /* Send to backup routers if this is being broadcasted to primary
1606 if (server->router && server->router->connection &&
1607 sock == server->router->connection && broadcast)
1608 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_ID, 0,
1609 idp->data, idp->len, FALSE, TRUE);
1611 silc_buffer_free(idp);
1614 /* Send New Channel Payload to notify about newly created channel in the
1615 SILC network. Router uses this to notify other routers in the network
1616 about new channel. This packet is broadcasted by router. */
1618 void silc_server_send_new_channel(SilcServer server,
1619 SilcSocketConnection sock,
1623 SilcUInt32 channel_id_len,
1628 SilcUInt32 name_len = strlen(channel_name);
1630 SILC_LOG_DEBUG(("Start"));
1632 cid = silc_id_id2str(channel_id, SILC_ID_CHANNEL);
1636 /* Encode the channel payload */
1637 packet = silc_channel_payload_encode(channel_name, name_len,
1638 cid, channel_id_len, mode);
1640 silc_server_packet_send(server, sock, SILC_PACKET_NEW_CHANNEL,
1641 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1642 packet->data, packet->len, FALSE);
1644 /* Send to backup routers if this is being broadcasted to primary
1646 if (server->server_type == SILC_ROUTER &&
1647 server->router && server->router->connection &&
1648 sock == server->router->connection && broadcast)
1649 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
1650 packet->data, packet->len, FALSE, TRUE);
1653 silc_buffer_free(packet);
1656 /* Send Channel Key payload to distribute the new channel key. Normal server
1657 sends this to router when new client joins to existing channel. Router
1658 sends this to the local server who sent the join command in case where
1659 the channel did not exist yet. Both normal and router servers uses this
1660 also to send this to locally connected clients on the channel. This
1661 must not be broadcasted packet. Routers do not send this to each other.
1662 If `sender is provided then the packet is not sent to that connection since
1663 it originally came from it. */
1665 void silc_server_send_channel_key(SilcServer server,
1666 SilcSocketConnection sender,
1667 SilcChannelEntry channel,
1668 unsigned char route)
1671 unsigned char *chid;
1674 SILC_LOG_DEBUG(("Sending key to channel %s", channel->channel_name));
1676 chid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1680 /* Encode channel key packet */
1681 tmp_len = strlen(channel->channel_key->cipher->name);
1682 packet = silc_channel_key_payload_encode(silc_id_get_len(channel->id,
1685 channel->channel_key->cipher->name,
1686 channel->key_len / 8, channel->key);
1687 silc_server_packet_send_to_channel(server, sender, channel,
1688 SILC_PACKET_CHANNEL_KEY,
1689 route, packet->data, packet->len,
1691 silc_buffer_free(packet);
1695 /* Generic function to send any command. The arguments must be sent already
1696 encoded into correct form in correct order. */
1698 void silc_server_send_command(SilcServer server,
1699 SilcSocketConnection sock,
1700 SilcCommand command,
1702 SilcUInt32 argc, ...)
1709 packet = silc_command_payload_encode_vap(command, ident, argc, ap);
1710 silc_server_packet_send(server, sock, SILC_PACKET_COMMAND, 0,
1711 packet->data, packet->len, TRUE);
1712 silc_buffer_free(packet);
1716 /* Generic function to send any command reply. The arguments must be sent
1717 already encoded into correct form in correct order. */
1719 void silc_server_send_command_reply(SilcServer server,
1720 SilcSocketConnection sock,
1721 SilcCommand command,
1722 SilcCommandStatus status,
1723 SilcCommandStatus error,
1725 SilcUInt32 argc, ...)
1732 packet = silc_command_reply_payload_encode_vap(command, status, error,
1734 silc_server_packet_send(server, sock, SILC_PACKET_COMMAND_REPLY, 0,
1735 packet->data, packet->len, TRUE);
1736 silc_buffer_free(packet);
1740 /* Generic function to send any command reply. The arguments must be sent
1741 already encoded into correct form in correct order. */
1743 void silc_server_send_dest_command_reply(SilcServer server,
1744 SilcSocketConnection sock,
1746 SilcIdType dst_id_type,
1747 SilcCommand command,
1748 SilcCommandStatus status,
1749 SilcCommandStatus error,
1751 SilcUInt32 argc, ...)
1758 packet = silc_command_reply_payload_encode_vap(command, status, error,
1760 silc_server_packet_send_dest(server, sock, SILC_PACKET_COMMAND_REPLY, 0,
1761 dst_id, dst_id_type, packet->data,
1763 silc_buffer_free(packet);
1767 /* Send the heartbeat packet. */
1769 void silc_server_send_heartbeat(SilcServer server,
1770 SilcSocketConnection sock)
1772 silc_server_packet_send(server, sock, SILC_PACKET_HEARTBEAT, 0,
1776 /* Generic function to relay packet we've received. This is used to relay
1777 packets to a client but generally can be used to other purposes as well. */
1779 void silc_server_relay_packet(SilcServer server,
1780 SilcSocketConnection dst_sock,
1783 SilcUInt32 sequence,
1784 SilcPacketContext *packet,
1787 const SilcBufferStruct p;
1789 silc_buffer_push(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1790 + packet->dst_id_len + packet->padlen);
1791 if (!silc_packet_send_prepare(dst_sock, 0, 0, packet->buffer->len, hmac,
1792 (const SilcBuffer)&p)) {
1793 SILC_LOG_ERROR(("Cannot send packet"));
1796 silc_buffer_put((SilcBuffer)&p, packet->buffer->data, packet->buffer->len);
1798 /* Re-encrypt packet */
1799 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p, p.len);
1801 /* Send the packet */
1802 silc_server_packet_send_real(server, dst_sock, force_send);
1804 silc_buffer_pull(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1805 + packet->dst_id_len + packet->padlen);
1808 /* Routine used to send the connection authentication packet. */
1810 void silc_server_send_connection_auth_request(SilcServer server,
1811 SilcSocketConnection sock,
1812 SilcUInt16 conn_type,
1813 SilcAuthMethod auth_meth)
1817 packet = silc_buffer_alloc(4);
1818 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1819 silc_buffer_format(packet,
1820 SILC_STR_UI_SHORT(conn_type),
1821 SILC_STR_UI_SHORT(auth_meth),
1824 silc_server_packet_send(server, sock, SILC_PACKET_CONNECTION_AUTH_REQUEST,
1825 0, packet->data, packet->len, FALSE);
1826 silc_buffer_free(packet);
1829 /* Purge the outgoing packet queue to the network if there is data. This
1830 function can be used to empty the packet queue. It is guaranteed that
1831 after this function returns the outgoing data queue is empty. */
1833 void silc_server_packet_queue_purge(SilcServer server,
1834 SilcSocketConnection sock)
1836 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
1837 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
1838 server->stat.packets_sent++;
1839 silc_packet_send(sock, TRUE);
1840 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
1841 SILC_UNSET_OUTBUF_PENDING(sock);
1842 silc_buffer_clear(sock->outbuf);