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;
450 silc_server_packet_send_dest(server, sock, type, flags,
451 client->id, SILC_ID_CLIENT,
452 data, data_len, force_send);
458 /* Internal routine to actually create the channel packet and send it
459 to network. This is common function in channel message sending. If
460 `channel_message' is TRUE this encrypts the message as it is strictly
461 a channel message. If FALSE normal encryption process is used. */
464 silc_server_packet_send_to_channel_real(SilcServer server,
465 SilcSocketConnection sock,
466 SilcPacketContext *packet,
472 bool channel_message,
476 const SilcBufferStruct p;
481 data_len = SILC_PACKET_DATALEN(data_len, (SILC_PACKET_HEADER_LEN +
483 packet->dst_id_len));
484 packet->truelen = data_len + SILC_PACKET_HEADER_LEN +
485 packet->src_id_len + packet->dst_id_len;
487 block_len = cipher ? silc_cipher_get_block_len(cipher) : 0;
489 packet->padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
491 packet->dst_id_len), block_len);
493 packet->padlen = SILC_PACKET_PADLEN(packet->truelen, block_len);
495 /* Put the data to buffer, assemble and encrypt the packet. The packet
496 is encrypted with normal session key shared with the client, unless
497 the `channel_message' is TRUE. */
498 if (!silc_packet_assemble(packet, NULL, cipher, hmac, sock, data,
499 data_len, (const SilcBuffer)&p)) {
500 SILC_LOG_ERROR(("Cannot assemble packet"));
505 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p,
506 SILC_PACKET_HEADER_LEN + packet->src_id_len +
507 packet->dst_id_len + packet->padlen);
509 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p, p.len);
511 SILC_LOG_HEXDUMP(("Channel packet (%d), len %d", sequence, p.len),
514 /* Now actually send the packet */
515 silc_server_packet_send_real(server, sock, force_send);
518 /* This routine is used by the server to send packets to channel. The
519 packet sent with this function is distributed to all clients on
520 the channel. Usually this is used to send notify messages to the
521 channel, things like notify about new user joining to the channel.
522 If `route' is FALSE then the packet is sent only locally and will not
523 be routed anywhere (for router locally means cell wide). If `sender'
524 is provided then the packet is not sent to that connection since it
525 originally came from it. If `send_to_clients' is FALSE then the
526 packet is not sent clients, only servers. */
528 void silc_server_packet_send_to_channel(SilcServer server,
529 SilcSocketConnection sender,
530 SilcChannelEntry channel,
537 SilcSocketConnection sock = NULL;
538 SilcPacketContext packetdata;
539 SilcClientEntry client = NULL;
540 SilcServerEntry *routed = NULL;
541 SilcChannelClientEntry chl;
542 SilcHashTableList htl;
543 SilcIDListData idata;
544 SilcUInt32 routed_count = 0;
548 /* This doesn't send channel message packets */
549 assert(type != SILC_PACKET_CHANNEL_MESSAGE);
551 SILC_LOG_DEBUG(("Sending packet to channel"));
553 /* Set the packet context pointers. */
554 packetdata.flags = 0;
555 packetdata.type = type;
556 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
557 packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
558 packetdata.src_id_type = SILC_ID_SERVER;
559 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
560 packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
561 packetdata.dst_id_type = SILC_ID_CHANNEL;
563 /* If there are global users in the channel we will send the message
564 first to our router for further routing. */
565 if (route && server->server_type != SILC_ROUTER && !server->standalone &&
566 channel->global_users) {
567 SilcServerEntry router;
569 /* Get data used in packet header encryption, keys and stuff. */
570 router = server->router;
571 sock = (SilcSocketConnection)router->connection;
572 idata = (SilcIDListData)router;
574 if (sock != sender) {
575 SILC_LOG_DEBUG(("Sending packet to router for routing"));
577 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
581 data, data_len, FALSE,
586 routed = silc_calloc(silc_hash_table_count(channel->user_list),
589 /* Send the message to clients on the channel's client list. */
590 silc_hash_table_list(channel->user_list, &htl);
591 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
592 client = chl->client;
596 /* If client has router set it is not locally connected client and
597 we will route the message to the router set in the client. Though,
598 send locally connected server in all cases. */
599 if (server->server_type == SILC_ROUTER && client->router &&
600 ((!route && client->router->router == server->id_entry) || route)) {
602 /* Check if we have sent the packet to this route already */
603 for (k = 0; k < routed_count; k++)
604 if (routed[k] == client->router)
606 if (k < routed_count)
609 /* Get data used in packet header encryption, keys and stuff. */
610 sock = (SilcSocketConnection)client->router->connection;
611 idata = (SilcIDListData)client->router;
613 if (sender && sock == sender)
616 /* Route only once to router. Protocol prohibits sending channel
617 messages to more than one router. */
618 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
624 /* Send the packet */
625 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
629 data, data_len, FALSE,
632 /* Mark this route routed already */
633 routed[routed_count++] = client->router;
640 /* Send to locally connected client */
642 /* Get data used in packet header encryption, keys and stuff. */
643 sock = (SilcSocketConnection)client->connection;
644 idata = (SilcIDListData)client;
646 if (!sock || (sender && sock == sender))
649 /* Send the packet */
650 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
654 data, data_len, FALSE,
658 silc_hash_table_list_reset(&htl);
660 silc_free(packetdata.src_id);
661 silc_free(packetdata.dst_id);
664 /* This checks whether the relayed packet came from router. If it did
665 then we'll need to encrypt it with the channel key. This is called
666 from the silc_server_packet_relay_to_channel. */
669 silc_server_packet_relay_to_channel_encrypt(SilcServer server,
670 SilcSocketConnection sock,
671 SilcChannelEntry channel,
673 unsigned int data_len)
675 /* If we are router and the packet came from router and private key
676 has not been set for the channel then we must encrypt the packet
677 as it was decrypted with the session key shared between us and the
678 router which sent it. This is so, because cells does not share the
680 if (server->server_type == SILC_ROUTER &&
681 sock->type == SILC_SOCKET_TYPE_ROUTER &&
682 !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY) &&
683 channel->channel_key) {
684 SilcUInt32 mac_len = silc_hmac_len(channel->hmac);
685 SilcUInt32 iv_len = silc_cipher_get_block_len(channel->channel_key);
687 if (data_len <= mac_len + iv_len) {
688 SILC_LOG_WARNING(("Corrupted channel message, cannot relay it"));
692 memcpy(channel->iv, data + (data_len - iv_len), iv_len);
693 silc_channel_message_payload_encrypt(data, data_len - iv_len - mac_len,
694 data_len, channel->iv, iv_len,
695 channel->channel_key, channel->hmac);
701 /* This routine is explicitly used to relay messages to some channel.
702 Packets sent with this function we have received earlier and are
703 totally encrypted. This just sends the packet to all clients on
704 the channel. If the sender of the packet is someone on the channel
705 the message will not be sent to that client. The SILC Packet header
706 is encrypted with the session key shared between us and the client.
707 MAC is also computed before encrypting the header. Rest of the
708 packet will be untouched. */
710 void silc_server_packet_relay_to_channel(SilcServer server,
711 SilcSocketConnection sender_sock,
712 SilcChannelEntry channel,
714 SilcIdType sender_type,
715 SilcClientEntry sender_entry,
720 SilcSocketConnection sock = NULL;
721 SilcPacketContext packetdata;
722 SilcClientEntry client = NULL;
723 SilcServerEntry *routed = NULL;
724 SilcChannelClientEntry chl;
725 SilcUInt32 routed_count = 0;
726 SilcIDListData idata;
727 SilcHashTableList htl;
731 SILC_LOG_DEBUG(("Relaying packet to channel"));
733 /* This encrypts the packet, if needed. It will be encrypted if
734 it came from the router thus it needs to be encrypted with the
735 channel key. If the channel key does not exist, then we know we
736 don't have a single local user on the channel. */
737 if (!silc_server_packet_relay_to_channel_encrypt(server, sender_sock,
742 /* Set the packet context pointers. */
743 packetdata.flags = 0;
744 packetdata.type = SILC_PACKET_CHANNEL_MESSAGE;
745 packetdata.src_id = silc_id_id2str(sender_id, sender_type);
746 packetdata.src_id_len = silc_id_get_len(sender_id, sender_type);
747 packetdata.src_id_type = sender_type;
748 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
749 packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
750 packetdata.dst_id_type = SILC_ID_CHANNEL;
752 /* If there are global users in the channel we will send the message
753 first to our router for further routing. */
754 if (server->server_type != SILC_ROUTER && !server->standalone &&
755 channel->global_users) {
756 SilcServerEntry router = server->router;
758 /* Check that the sender is not our router. */
759 if (sender_sock != (SilcSocketConnection)router->connection) {
761 /* Get data used in packet header encryption, keys and stuff. */
762 sock = (SilcSocketConnection)router->connection;
763 idata = (SilcIDListData)router;
765 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
767 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
771 data, data_len, TRUE,
776 routed = silc_calloc(silc_hash_table_count(channel->user_list),
779 /* Assure we won't route the message back to the sender's way. */
780 if (sender_entry->router)
781 routed[routed_count++] = sender_entry->router;
783 /* Send the message to clients on the channel's client list. */
784 silc_hash_table_list(channel->user_list, &htl);
785 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
786 client = chl->client;
787 if (!client || client == sender_entry ||
788 chl->mode & SILC_CHANNEL_UMODE_BLOCK_MESSAGES)
791 /* If the client has set router it means that it is not locally
792 connected client and we will route the packet further. */
793 if (server->server_type == SILC_ROUTER && client->router) {
795 /* Check if we have sent the packet to this route already */
796 for (k = 0; k < routed_count; k++)
797 if (routed[k] == client->router)
799 if (k < routed_count)
802 /* Get data used in packet header encryption, keys and stuff. */
803 sock = (SilcSocketConnection)client->router->connection;
804 idata = (SilcIDListData)client->router;
806 /* Check if the sender socket is the same as this client's router
808 if (sender_sock && sock == sender_sock)
811 SILC_LOG_DEBUG(("Relaying packet to client ID(%s) %s (%s)",
812 silc_id_render(client->id, SILC_ID_CLIENT),
813 sock->hostname, sock->ip));
815 /* Mark this route routed already. */
816 routed[routed_count++] = client->router;
818 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
819 /* The remote connection is router then we'll decrypt the
820 channel message and re-encrypt it with the session key shared
821 between us and the remote router. This is done because the
822 channel keys are cell specific and we have different channel
823 key than the remote router has. */
825 /* Route only once to router. Protocol prohibits sending channel
826 messages to more than one router. */
831 SILC_LOG_DEBUG(("Remote is router, encrypt with session key"));
833 /* If private key mode is not set then decrypt the packet
835 if (!(channel->mode & SILC_CHANNEL_MODE_PRIVKEY) &&
836 channel->channel_key) {
837 unsigned char tmp[SILC_PACKET_MAX_LEN];
839 if (data_len > SILC_PACKET_MAX_LEN)
840 data_len = SILC_PACKET_MAX_LEN;
841 memcpy(tmp, data, data_len);
843 /* Decrypt the channel message (we don't check the MAC) */
844 silc_channel_message_payload_decrypt(tmp, data_len,
845 channel->channel_key, NULL);
847 /* Now re-encrypt and send it to the router */
848 silc_server_packet_send_srcdest(server, sock,
849 SILC_PACKET_CHANNEL_MESSAGE, 0,
850 sender_id, sender_type,
851 channel->id, SILC_ID_CHANNEL,
852 tmp, data_len, force_send);
854 /* Private key mode is set, we don't have the channel key, so
855 just re-encrypt the entire packet and send it to the router. */
856 silc_server_packet_send_srcdest(server, sock,
857 SILC_PACKET_CHANNEL_MESSAGE, 0,
858 sender_id, sender_type,
859 channel->id, SILC_ID_CHANNEL,
860 data, data_len, force_send);
863 /* Send the packet to normal server */
864 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
868 data, data_len, TRUE,
878 /* Get data used in packet header encryption, keys and stuff. */
879 sock = (SilcSocketConnection)client->connection;
880 idata = (SilcIDListData)client;
882 if (!sock || (sender_sock && sock == sender_sock))
885 SILC_LOG_DEBUG(("Sending packet to client ID(%s) %s (%s)",
886 silc_id_render(client->id, SILC_ID_CLIENT),
887 sock->hostname, sock->ip));
889 /* Send the packet */
890 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
894 data, data_len, TRUE,
898 silc_hash_table_list_reset(&htl);
900 silc_free(packetdata.src_id);
901 silc_free(packetdata.dst_id);
904 /* This function is used to send packets strictly to all local clients
905 on a particular channel. This is used for example to distribute new
906 channel key to all our locally connected clients on the channel.
907 The packets are always encrypted with the session key shared between
908 the client, this means these are not _to the channel_ but _to the client_
911 void silc_server_packet_send_local_channel(SilcServer server,
912 SilcChannelEntry channel,
914 SilcPacketFlags flags,
919 SilcChannelClientEntry chl;
920 SilcHashTableList htl;
921 SilcSocketConnection sock = NULL;
923 SILC_LOG_DEBUG(("Start"));
925 /* Send the message to clients on the channel's client list. */
926 silc_hash_table_list(channel->user_list, &htl);
927 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
928 if (chl->client && !chl->client->router) {
929 sock = (SilcSocketConnection)chl->client->connection;
931 /* Send the packet to the client */
932 silc_server_packet_send_dest(server, sock, type, flags, chl->client->id,
933 SILC_ID_CLIENT, data, data_len,
937 silc_hash_table_list_reset(&htl);
940 /* Routine used to send (relay, route) private messages to some destination.
941 If the private message key does not exist then the message is re-encrypted,
942 otherwise we just pass it along. This really is not used to send new
943 private messages (as server does not send them) but to relay received
946 void silc_server_send_private_message(SilcServer server,
947 SilcSocketConnection dst_sock,
951 SilcPacketContext *packet)
953 SilcBuffer buffer = packet->buffer;
954 const SilcBufferStruct p;
956 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
957 + packet->dst_id_len + packet->padlen);
958 if (!silc_packet_send_prepare(dst_sock, 0, 0, buffer->len, hmac,
959 (const SilcBuffer)&p)) {
960 SILC_LOG_ERROR(("Cannot send packet"));
963 silc_buffer_put((SilcBuffer)&p, buffer->data, buffer->len);
965 /* Re-encrypt and send if private messge key does not exist */
966 if (!(packet->flags & SILC_PACKET_FLAG_PRIVMSG_KEY)) {
967 /* Re-encrypt packet */
968 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p, buffer->len);
970 /* Key exist so encrypt just header and send it */
971 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p,
972 SILC_PACKET_HEADER_LEN + packet->src_id_len +
973 packet->dst_id_len + packet->padlen);
976 /* Send the packet */
977 silc_server_packet_send_real(server, dst_sock, FALSE);
980 /* Sends current motd to client */
982 void silc_server_send_motd(SilcServer server,
983 SilcSocketConnection sock)
985 char *motd, *motd_file = NULL;
989 motd_file = server->config->server_info->motd_file;
992 motd = silc_file_readfile(motd_file, &motd_len);
996 silc_server_send_notify(server, sock, FALSE, SILC_NOTIFY_TYPE_MOTD, 1,
1002 /* Sends error message. Error messages may or may not have any
1005 void silc_server_send_error(SilcServer server,
1006 SilcSocketConnection sock,
1007 const char *fmt, ...)
1010 unsigned char buf[4096];
1012 memset(buf, 0, sizeof(buf));
1014 vsprintf(buf, fmt, ap);
1017 silc_server_packet_send(server, sock, SILC_PACKET_ERROR, 0,
1018 buf, strlen(buf), FALSE);
1021 /* Sends notify message. If format is TRUE the variable arguments are
1022 formatted and the formatted string is sent as argument payload. If it is
1023 FALSE then each argument is sent as separate argument and their format
1024 in the argument list must be { argument data, argument length }. */
1026 void silc_server_send_notify(SilcServer server,
1027 SilcSocketConnection sock,
1029 SilcNotifyType type,
1030 SilcUInt32 argc, ...)
1037 packet = silc_notify_payload_encode(type, argc, ap);
1038 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
1039 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1040 packet->data, packet->len, FALSE);
1042 /* Send to backup routers if this is being broadcasted to primary
1044 if (server->router && server->router->connection &&
1045 sock == server->router->connection && broadcast)
1046 silc_server_backup_send(server, NULL, SILC_PACKET_NOTIFY, 0,
1047 packet->data, packet->len, FALSE, TRUE);
1049 silc_buffer_free(packet);
1053 /* Sends notify message and gets the arguments from the `args' Argument
1056 void silc_server_send_notify_args(SilcServer server,
1057 SilcSocketConnection sock,
1059 SilcNotifyType type,
1065 packet = silc_notify_payload_encode_args(type, argc, args);
1066 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
1067 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1068 packet->data, packet->len, FALSE);
1069 silc_buffer_free(packet);
1072 /* Send CHANNEL_CHANGE notify type. This tells the receiver to replace the
1073 `old_id' with the `new_id'. */
1075 void silc_server_send_notify_channel_change(SilcServer server,
1076 SilcSocketConnection sock,
1078 SilcChannelID *old_id,
1079 SilcChannelID *new_id)
1081 SilcBuffer idp1, idp2;
1083 idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CHANNEL);
1084 idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CHANNEL);
1086 silc_server_send_notify(server, sock, broadcast,
1087 SILC_NOTIFY_TYPE_CHANNEL_CHANGE,
1088 2, idp1->data, idp1->len, idp2->data, idp2->len);
1089 silc_buffer_free(idp1);
1090 silc_buffer_free(idp2);
1093 /* Send NICK_CHANGE notify type. This tells the receiver to replace the
1094 `old_id' with the `new_id'. */
1096 void silc_server_send_notify_nick_change(SilcServer server,
1097 SilcSocketConnection sock,
1099 SilcClientID *old_id,
1100 SilcClientID *new_id,
1101 const char *nickname)
1103 SilcBuffer idp1, idp2;
1105 idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CLIENT);
1106 idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CLIENT);
1108 silc_server_send_notify(server, sock, broadcast,
1109 SILC_NOTIFY_TYPE_NICK_CHANGE,
1110 3, idp1->data, idp1->len, idp2->data, idp2->len,
1111 nickname, nickname ? strlen(nickname) : 0);
1112 silc_buffer_free(idp1);
1113 silc_buffer_free(idp2);
1116 /* Sends JOIN notify type. This tells that new client by `client_id' ID
1117 has joined to the `channel'. */
1119 void silc_server_send_notify_join(SilcServer server,
1120 SilcSocketConnection sock,
1122 SilcChannelEntry channel,
1123 SilcClientID *client_id)
1125 SilcBuffer idp1, idp2;
1127 idp1 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1128 idp2 = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1129 silc_server_send_notify(server, sock, broadcast, SILC_NOTIFY_TYPE_JOIN,
1130 2, idp1->data, idp1->len,
1131 idp2->data, idp2->len);
1132 silc_buffer_free(idp1);
1133 silc_buffer_free(idp2);
1136 /* Sends LEAVE notify type. This tells that `client_id' has left the
1137 `channel'. The Notify packet is always destined to the channel. */
1139 void silc_server_send_notify_leave(SilcServer server,
1140 SilcSocketConnection sock,
1142 SilcChannelEntry channel,
1143 SilcClientID *client_id)
1147 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1148 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1149 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_LEAVE,
1150 1, idp->data, idp->len);
1151 silc_buffer_free(idp);
1154 /* Sends CMODE_CHANGE notify type. This tells that `client_id' changed the
1155 `channel' mode to `mode. The Notify packet is always destined to
1158 void silc_server_send_notify_cmode(SilcServer server,
1159 SilcSocketConnection sock,
1161 SilcChannelEntry channel,
1162 SilcUInt32 mode_mask,
1163 void *id, SilcIdType id_type,
1164 char *cipher, char *hmac,
1168 unsigned char mode[4];
1170 idp = silc_id_payload_encode((void *)id, id_type);
1171 SILC_PUT32_MSB(mode_mask, mode);
1173 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1174 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_CMODE_CHANGE,
1175 5, idp->data, idp->len,
1177 cipher, cipher ? strlen(cipher) : 0,
1178 hmac, hmac ? strlen(hmac) : 0,
1179 passphrase, passphrase ?
1180 strlen(passphrase) : 0);
1181 silc_buffer_free(idp);
1184 /* Sends CUMODE_CHANGE notify type. This tells that `client_id' changed the
1185 `target' client's mode on `channel'. The notify packet is always
1186 destined to the channel. */
1188 void silc_server_send_notify_cumode(SilcServer server,
1189 SilcSocketConnection sock,
1191 SilcChannelEntry channel,
1192 SilcUInt32 mode_mask,
1193 void *id, SilcIdType id_type,
1194 SilcClientID *target)
1196 SilcBuffer idp1, idp2;
1197 unsigned char mode[4];
1199 idp1 = silc_id_payload_encode((void *)id, id_type);
1200 idp2 = silc_id_payload_encode((void *)target, SILC_ID_CLIENT);
1201 SILC_PUT32_MSB(mode_mask, mode);
1203 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1205 SILC_NOTIFY_TYPE_CUMODE_CHANGE, 3,
1206 idp1->data, idp1->len,
1208 idp2->data, idp2->len);
1209 silc_buffer_free(idp1);
1210 silc_buffer_free(idp2);
1213 /* Sends SIGNOFF notify type. This tells that `client_id' client has
1214 left SILC network. This function is used only between server and router
1215 traffic. This is not used to send the notify to the channel for
1216 client. The `message may be NULL. */
1218 void silc_server_send_notify_signoff(SilcServer server,
1219 SilcSocketConnection sock,
1221 SilcClientID *client_id,
1222 const char *message)
1226 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1227 silc_server_send_notify(server, sock, broadcast,
1228 SILC_NOTIFY_TYPE_SIGNOFF,
1229 message ? 2 : 1, idp->data, idp->len,
1230 message, message ? strlen(message): 0);
1231 silc_buffer_free(idp);
1234 /* Sends TOPIC_SET notify type. This tells that `id' changed
1235 the `channel's topic to `topic'. The Notify packet is always destined
1236 to the channel. This function is used to send the topic set notifies
1239 void silc_server_send_notify_topic_set(SilcServer server,
1240 SilcSocketConnection sock,
1242 SilcChannelEntry channel,
1243 void *id, SilcIdType id_type,
1248 idp = silc_id_payload_encode(id, id_type);
1249 silc_server_send_notify_dest(server, sock, broadcast,
1250 (void *)channel->id, SILC_ID_CHANNEL,
1251 SILC_NOTIFY_TYPE_TOPIC_SET,
1253 idp->data, idp->len,
1254 topic, topic ? strlen(topic) : 0);
1255 silc_buffer_free(idp);
1258 /* Send KICKED notify type. This tells that the `client_id' on `channel'
1259 was kicked off the channel. The `comment' may indicate the reason
1260 for the kicking. This function is used only between server and router
1263 void silc_server_send_notify_kicked(SilcServer server,
1264 SilcSocketConnection sock,
1266 SilcChannelEntry channel,
1267 SilcClientID *client_id,
1268 SilcClientID *kicker,
1274 idp1 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1275 idp2 = silc_id_payload_encode((void *)kicker, SILC_ID_CLIENT);
1276 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1277 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_KICKED, 3,
1278 idp1->data, idp1->len,
1279 comment, comment ? strlen(comment) : 0,
1280 idp2->data, idp2->len);
1281 silc_buffer_free(idp1);
1282 silc_buffer_free(idp2);
1285 /* Send KILLED notify type. This tells that the `client_id' client was
1286 killed from the network. The `comment' may indicate the reason
1289 void silc_server_send_notify_killed(SilcServer server,
1290 SilcSocketConnection sock,
1292 SilcClientID *client_id,
1293 const char *comment,
1294 void *killer, SilcIdType killer_type)
1299 idp1 = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
1300 idp2 = silc_id_payload_encode(killer, killer_type);
1301 silc_server_send_notify_dest(server, sock, broadcast, (void *)client_id,
1302 SILC_ID_CLIENT, SILC_NOTIFY_TYPE_KILLED,
1303 3, idp1->data, idp1->len,
1304 comment, comment ? strlen(comment) : 0,
1305 idp2->data, idp2->len);
1306 silc_buffer_free(idp1);
1307 silc_buffer_free(idp2);
1310 /* Sends UMODE_CHANGE notify type. This tells that `client_id' client's
1311 user mode in the SILC Network was changed. This function is used to
1312 send the packet between routers as broadcast packet. */
1314 void silc_server_send_notify_umode(SilcServer server,
1315 SilcSocketConnection sock,
1317 SilcClientID *client_id,
1318 SilcUInt32 mode_mask)
1321 unsigned char mode[4];
1323 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1324 SILC_PUT32_MSB(mode_mask, mode);
1326 silc_server_send_notify(server, sock, broadcast,
1327 SILC_NOTIFY_TYPE_UMODE_CHANGE, 2,
1328 idp->data, idp->len,
1330 silc_buffer_free(idp);
1333 /* Sends BAN notify type. This tells that ban has been either `add'ed
1334 or `del'eted on the `channel. This function is used to send the packet
1335 between routers as broadcast packet. */
1337 void silc_server_send_notify_ban(SilcServer server,
1338 SilcSocketConnection sock,
1340 SilcChannelEntry channel,
1341 char *add, char *del)
1345 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1346 silc_server_send_notify(server, sock, broadcast,
1347 SILC_NOTIFY_TYPE_BAN, 3,
1348 idp->data, idp->len,
1349 add, add ? strlen(add) : 0,
1350 del, del ? strlen(del) : 0);
1351 silc_buffer_free(idp);
1354 /* Sends INVITE notify type. This tells that invite has been either `add'ed
1355 or `del'eted on the `channel. The sender of the invite is the `client_id'.
1356 This function is used to send the packet between routers as broadcast
1359 void silc_server_send_notify_invite(SilcServer server,
1360 SilcSocketConnection sock,
1362 SilcChannelEntry channel,
1363 SilcClientID *client_id,
1364 char *add, char *del)
1366 SilcBuffer idp, idp2;
1368 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1369 idp2 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1370 silc_server_send_notify(server, sock, broadcast,
1371 SILC_NOTIFY_TYPE_INVITE, 5,
1372 idp->data, idp->len,
1373 channel->channel_name, strlen(channel->channel_name),
1374 idp2->data, idp2->len,
1375 add, add ? strlen(add) : 0,
1376 del, del ? strlen(del) : 0);
1377 silc_buffer_free(idp);
1378 silc_buffer_free(idp2);
1381 /* Sends notify message destined to specific entity. */
1383 void silc_server_send_notify_dest(SilcServer server,
1384 SilcSocketConnection sock,
1387 SilcIdType dest_id_type,
1388 SilcNotifyType type,
1389 SilcUInt32 argc, ...)
1396 packet = silc_notify_payload_encode(type, argc, ap);
1397 silc_server_packet_send_dest(server, sock, SILC_PACKET_NOTIFY,
1398 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1399 dest_id, dest_id_type,
1400 packet->data, packet->len, FALSE);
1401 silc_buffer_free(packet);
1405 /* Sends notify message to a channel. The notify message sent is
1406 distributed to all clients on the channel. If `route_notify' is TRUE
1407 then the notify may be routed to primary route or to some other routers.
1408 If FALSE it is assured that the notify is sent only locally. If `sender'
1409 is provided then the packet is not sent to that connection since it
1410 originally came from it. */
1412 void silc_server_send_notify_to_channel(SilcServer server,
1413 SilcSocketConnection sender,
1414 SilcChannelEntry channel,
1416 SilcNotifyType type,
1417 SilcUInt32 argc, ...)
1424 packet = silc_notify_payload_encode(type, argc, ap);
1425 silc_server_packet_send_to_channel(server, sender, channel,
1426 SILC_PACKET_NOTIFY, route_notify,
1427 packet->data, packet->len, FALSE);
1428 silc_buffer_free(packet);
1432 /* Send notify message to all channels the client has joined. It is quaranteed
1433 that the message is sent only once to a client (ie. if a client is joined
1434 on two same channel it will receive only one notify message). Also, this
1435 sends only to local clients (locally connected if we are server, and to
1436 local servers if we are router). If `sender' is provided the packet is
1437 not sent to that client at all. */
1439 void silc_server_send_notify_on_channels(SilcServer server,
1440 SilcClientEntry sender,
1441 SilcClientEntry client,
1442 SilcNotifyType type,
1443 SilcUInt32 argc, ...)
1446 SilcSocketConnection sock = NULL;
1447 SilcPacketContext packetdata;
1449 SilcClientEntry *sent_clients = NULL;
1450 SilcUInt32 sent_clients_count = 0;
1451 SilcServerEntry *routed = NULL;
1452 SilcUInt32 routed_count = 0;
1453 SilcHashTableList htl, htl2;
1454 SilcChannelEntry channel;
1455 SilcChannelClientEntry chl, chl2;
1456 SilcIDListData idata;
1458 unsigned char *data;
1459 SilcUInt32 data_len;
1460 bool force_send = FALSE;
1463 SILC_LOG_DEBUG(("Start"));
1465 if (!silc_hash_table_count(client->channels))
1469 packet = silc_notify_payload_encode(type, argc, ap);
1470 data = packet->data;
1471 data_len = packet->len;
1473 /* Set the packet context pointers. */
1474 packetdata.flags = 0;
1475 packetdata.type = SILC_PACKET_NOTIFY;
1476 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
1477 packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1478 packetdata.src_id_type = SILC_ID_SERVER;
1480 silc_hash_table_list(client->channels, &htl);
1481 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
1482 channel = chl->channel;
1484 /* Send the message to all clients on the channel's client list. */
1485 silc_hash_table_list(channel->user_list, &htl2);
1486 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
1489 if (sender && c == sender)
1492 /* Check if we have sent the packet to this client already */
1493 for (k = 0; k < sent_clients_count; k++)
1494 if (sent_clients[k] == c)
1496 if (k < sent_clients_count)
1499 /* If we are router and if this client has router set it is not
1500 locally connected client and we will route the message to the
1501 router set in the client. */
1502 if (c && c->router && server->server_type == SILC_ROUTER) {
1503 /* Check if we have sent the packet to this route already */
1504 for (k = 0; k < routed_count; k++)
1505 if (routed[k] == c->router)
1507 if (k < routed_count)
1510 /* Get data used in packet header encryption, keys and stuff. */
1511 sock = (SilcSocketConnection)c->router->connection;
1512 idata = (SilcIDListData)c->router;
1515 SILC_LOG_DEBUG(("*****************"));
1516 SILC_LOG_DEBUG(("client->router->id %s",
1517 silc_id_render(c->router->id, SILC_ID_SERVER)));
1518 SILC_LOG_DEBUG(("client->router->connection->user_data->id %s",
1519 silc_id_render(((SilcServerEntry)sock->user_data)->id, SILC_ID_SERVER)));
1522 packetdata.dst_id = silc_id_id2str(c->router->id, SILC_ID_SERVER);
1523 packetdata.dst_id_len = silc_id_get_len(c->router->id, SILC_ID_SERVER);
1524 packetdata.dst_id_type = SILC_ID_SERVER;
1526 /* Send the packet */
1527 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1531 data, data_len, FALSE,
1534 silc_free(packetdata.dst_id);
1536 /* We want to make sure that the packet is routed to same router
1537 only once. Mark this route as sent route. */
1538 routed = silc_realloc(routed, sizeof(*routed) * (routed_count + 1));
1539 routed[routed_count++] = c->router;
1546 /* Send to locally connected client */
1549 /* Get data used in packet header encryption, keys and stuff. */
1550 sock = (SilcSocketConnection)c->connection;
1551 idata = (SilcIDListData)c;
1556 packetdata.dst_id = silc_id_id2str(c->id, SILC_ID_CLIENT);
1557 packetdata.dst_id_len = silc_id_get_len(c->id, SILC_ID_CLIENT);
1558 packetdata.dst_id_type = SILC_ID_CLIENT;
1560 /* Send the packet */
1561 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1565 data, data_len, FALSE,
1568 silc_free(packetdata.dst_id);
1570 /* Make sure that we send the notify only once per client. */
1571 sent_clients = silc_realloc(sent_clients, sizeof(*sent_clients) *
1572 (sent_clients_count + 1));
1573 sent_clients[sent_clients_count++] = c;
1576 silc_hash_table_list_reset(&htl2);
1579 silc_hash_table_list_reset(&htl);
1581 silc_free(sent_clients);
1582 silc_free(packetdata.src_id);
1583 silc_buffer_free(packet);
1587 /* Sends New ID Payload to remote end. The packet is used to distribute
1588 information about new registered clients, servers, channel etc. usually
1589 to routers so that they can keep these information up to date.
1590 If the argument `broadcast' is TRUE then the packet is sent as
1591 broadcast packet. */
1593 void silc_server_send_new_id(SilcServer server,
1594 SilcSocketConnection sock,
1596 void *id, SilcIdType id_type,
1601 SILC_LOG_DEBUG(("Start"));
1603 idp = silc_id_payload_encode(id, id_type);
1604 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID,
1605 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1606 idp->data, idp->len, FALSE);
1608 /* Send to backup routers if this is being broadcasted to primary
1610 if (server->router && server->router->connection &&
1611 sock == server->router->connection && broadcast)
1612 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_ID, 0,
1613 idp->data, idp->len, FALSE, TRUE);
1615 silc_buffer_free(idp);
1618 /* Send New Channel Payload to notify about newly created channel in the
1619 SILC network. Router uses this to notify other routers in the network
1620 about new channel. This packet is broadcasted by router. */
1622 void silc_server_send_new_channel(SilcServer server,
1623 SilcSocketConnection sock,
1627 SilcUInt32 channel_id_len,
1632 SilcUInt32 name_len = strlen(channel_name);
1634 SILC_LOG_DEBUG(("Start"));
1636 cid = silc_id_id2str(channel_id, SILC_ID_CHANNEL);
1640 /* Encode the channel payload */
1641 packet = silc_channel_payload_encode(channel_name, name_len,
1642 cid, channel_id_len, mode);
1644 silc_server_packet_send(server, sock, SILC_PACKET_NEW_CHANNEL,
1645 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1646 packet->data, packet->len, FALSE);
1648 /* Send to backup routers if this is being broadcasted to primary
1650 if (server->server_type == SILC_ROUTER &&
1651 server->router && server->router->connection &&
1652 sock == server->router->connection && broadcast)
1653 silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
1654 packet->data, packet->len, FALSE, TRUE);
1657 silc_buffer_free(packet);
1660 /* Send Channel Key payload to distribute the new channel key. Normal server
1661 sends this to router when new client joins to existing channel. Router
1662 sends this to the local server who sent the join command in case where
1663 the channel did not exist yet. Both normal and router servers uses this
1664 also to send this to locally connected clients on the channel. This
1665 must not be broadcasted packet. Routers do not send this to each other.
1666 If `sender is provided then the packet is not sent to that connection since
1667 it originally came from it. */
1669 void silc_server_send_channel_key(SilcServer server,
1670 SilcSocketConnection sender,
1671 SilcChannelEntry channel,
1672 unsigned char route)
1675 unsigned char *chid;
1678 SILC_LOG_DEBUG(("Sending key to channel %s", channel->channel_name));
1680 chid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1684 /* Encode channel key packet */
1685 tmp_len = strlen(channel->channel_key->cipher->name);
1686 packet = silc_channel_key_payload_encode(silc_id_get_len(channel->id,
1689 channel->channel_key->cipher->name,
1690 channel->key_len / 8, channel->key);
1691 silc_server_packet_send_to_channel(server, sender, channel,
1692 SILC_PACKET_CHANNEL_KEY,
1693 route, packet->data, packet->len,
1695 silc_buffer_free(packet);
1699 /* Generic function to send any command. The arguments must be sent already
1700 encoded into correct form in correct order. */
1702 void silc_server_send_command(SilcServer server,
1703 SilcSocketConnection sock,
1704 SilcCommand command,
1706 SilcUInt32 argc, ...)
1713 packet = silc_command_payload_encode_vap(command, ident, argc, ap);
1714 silc_server_packet_send(server, sock, SILC_PACKET_COMMAND, 0,
1715 packet->data, packet->len, TRUE);
1716 silc_buffer_free(packet);
1720 /* Generic function to send any command reply. The arguments must be sent
1721 already encoded into correct form in correct order. */
1723 void silc_server_send_command_reply(SilcServer server,
1724 SilcSocketConnection sock,
1725 SilcCommand command,
1726 SilcCommandStatus status,
1727 SilcCommandStatus error,
1729 SilcUInt32 argc, ...)
1736 packet = silc_command_reply_payload_encode_vap(command, status, error,
1738 silc_server_packet_send(server, sock, SILC_PACKET_COMMAND_REPLY, 0,
1739 packet->data, packet->len, TRUE);
1740 silc_buffer_free(packet);
1744 /* Generic function to send any command reply. The arguments must be sent
1745 already encoded into correct form in correct order. */
1747 void silc_server_send_dest_command_reply(SilcServer server,
1748 SilcSocketConnection sock,
1750 SilcIdType dst_id_type,
1751 SilcCommand command,
1752 SilcCommandStatus status,
1753 SilcCommandStatus error,
1755 SilcUInt32 argc, ...)
1762 packet = silc_command_reply_payload_encode_vap(command, status, error,
1764 silc_server_packet_send_dest(server, sock, SILC_PACKET_COMMAND_REPLY, 0,
1765 dst_id, dst_id_type, packet->data,
1767 silc_buffer_free(packet);
1771 /* Send the heartbeat packet. */
1773 void silc_server_send_heartbeat(SilcServer server,
1774 SilcSocketConnection sock)
1776 silc_server_packet_send(server, sock, SILC_PACKET_HEARTBEAT, 0,
1780 /* Generic function to relay packet we've received. This is used to relay
1781 packets to a client but generally can be used to other purposes as well. */
1783 void silc_server_relay_packet(SilcServer server,
1784 SilcSocketConnection dst_sock,
1787 SilcUInt32 sequence,
1788 SilcPacketContext *packet,
1791 const SilcBufferStruct p;
1793 silc_buffer_push(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1794 + packet->dst_id_len + packet->padlen);
1795 if (!silc_packet_send_prepare(dst_sock, 0, 0, packet->buffer->len, hmac,
1796 (const SilcBuffer)&p)) {
1797 SILC_LOG_ERROR(("Cannot send packet"));
1800 silc_buffer_put((SilcBuffer)&p, packet->buffer->data, packet->buffer->len);
1802 /* Re-encrypt packet */
1803 silc_packet_encrypt(cipher, hmac, sequence, (SilcBuffer)&p, p.len);
1805 /* Send the packet */
1806 silc_server_packet_send_real(server, dst_sock, force_send);
1808 silc_buffer_pull(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1809 + packet->dst_id_len + packet->padlen);
1812 /* Routine used to send the connection authentication packet. */
1814 void silc_server_send_connection_auth_request(SilcServer server,
1815 SilcSocketConnection sock,
1816 SilcUInt16 conn_type,
1817 SilcAuthMethod auth_meth)
1821 packet = silc_buffer_alloc(4);
1822 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1823 silc_buffer_format(packet,
1824 SILC_STR_UI_SHORT(conn_type),
1825 SILC_STR_UI_SHORT(auth_meth),
1828 silc_server_packet_send(server, sock, SILC_PACKET_CONNECTION_AUTH_REQUEST,
1829 0, packet->data, packet->len, FALSE);
1830 silc_buffer_free(packet);
1833 /* Purge the outgoing packet queue to the network if there is data. This
1834 function can be used to empty the packet queue. It is guaranteed that
1835 after this function returns the outgoing data queue is empty. */
1837 void silc_server_packet_queue_purge(SilcServer server,
1838 SilcSocketConnection sock)
1840 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
1841 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
1842 server->stat.packets_sent++;
1843 silc_packet_send(sock, TRUE);
1844 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
1845 SILC_UNSET_OUTBUF_PENDING(sock);
1846 silc_buffer_clear(sock->outbuf);