5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * Server packet routines to 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))
48 ret = silc_packet_send(sock, force_send);
52 /* Mark that there is some outgoing data available for this connection.
53 This call sets the connection both for input and output (the input
54 is set always and this call keeps the input setting, actually).
55 Actual data sending is performed by silc_server_packet_process. */
56 SILC_SET_CONNECTION_FOR_OUTPUT(server->schedule, sock->sock);
58 /* Mark to socket that data is pending in outgoing buffer. This flag
59 is needed if new data is added to the buffer before the earlier
60 put data is sent to the network. */
61 SILC_SET_OUTBUF_PENDING(sock);
66 /* Assembles a new packet to be sent out to network. This doesn't actually
67 send the packet but creates the packet and fills the outgoing data
68 buffer and marks the packet ready to be sent to network. However, If
69 argument force_send is TRUE the packet is sent immediately and not put
70 to queue. Normal case is that the packet is not sent immediately. */
72 void silc_server_packet_send(SilcServer server,
73 SilcSocketConnection sock,
75 SilcPacketFlags flags,
81 SilcIdType dst_id_type = SILC_ID_NONE;
86 /* If disconnecting, ignore the data */
87 if (SILC_IS_DISCONNECTING(sock))
90 /* Get data used in the packet sending, keys and stuff */
92 case SILC_SOCKET_TYPE_CLIENT:
93 if (sock->user_data) {
94 dst_id = ((SilcClientEntry)sock->user_data)->id;
95 dst_id_type = SILC_ID_CLIENT;
98 case SILC_SOCKET_TYPE_SERVER:
99 case SILC_SOCKET_TYPE_ROUTER:
100 if (sock->user_data) {
101 dst_id = ((SilcServerEntry)sock->user_data)->id;
102 dst_id_type = SILC_ID_SERVER;
109 silc_server_packet_send_dest(server, sock, type, flags, dst_id,
110 dst_id_type, data, data_len, force_send);
113 /* Assembles a new packet to be sent out to network. This doesn't actually
114 send the packet but creates the packet and fills the outgoing data
115 buffer and marks the packet ready to be sent to network. However, If
116 argument force_send is TRUE the packet is sent immediately and not put
117 to queue. Normal case is that the packet is not sent immediately.
118 Destination information is sent as argument for this function. */
120 void silc_server_packet_send_dest(SilcServer server,
121 SilcSocketConnection sock,
123 SilcPacketFlags flags,
125 SilcIdType dst_id_type,
130 SilcPacketContext packetdata;
131 SilcIDListData idata;
132 SilcCipher cipher = NULL;
133 SilcHmac hmac = NULL;
134 unsigned char *dst_id_data = NULL;
135 uint32 dst_id_len = 0;
137 /* If disconnecting, ignore the data */
138 if (SILC_IS_DISCONNECTING(sock))
141 SILC_LOG_DEBUG(("Sending packet, type %d", type));
143 /* Get data used in the packet sending, keys and stuff */
144 idata = (SilcIDListData)sock->user_data;
147 dst_id_data = silc_id_id2str(dst_id, dst_id_type);
148 dst_id_len = silc_id_get_len(dst_id, dst_id_type);
151 /* Set the packet context pointers */
152 packetdata.type = type;
153 packetdata.flags = flags;
154 packetdata.src_id = silc_id_id2str(server->id, server->id_type);
155 packetdata.src_id_len = silc_id_get_len(server->id, server->id_type);
156 packetdata.src_id_type = server->id_type;
157 packetdata.dst_id = dst_id_data;
158 packetdata.dst_id_len = dst_id_len;
159 packetdata.dst_id_type = dst_id_type;
160 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
161 packetdata.src_id_len + dst_id_len;
162 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
164 /* Prepare outgoing data buffer for packet sending */
165 silc_packet_send_prepare(sock,
166 SILC_PACKET_HEADER_LEN +
167 packetdata.src_id_len +
168 packetdata.dst_id_len,
172 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
174 packetdata.buffer = sock->outbuf;
176 /* Put the data to the buffer */
177 if (data && data_len)
178 silc_buffer_put(sock->outbuf, data, data_len);
180 /* Create the outgoing packet */
181 silc_packet_assemble(&packetdata);
184 cipher = idata->send_key;
185 hmac = idata->hmac_send;
188 /* Encrypt the packet */
189 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
191 SILC_LOG_HEXDUMP(("Outgoing packet, len %d", sock->outbuf->len),
192 sock->outbuf->data, sock->outbuf->len);
194 /* Now actually send the packet */
195 silc_server_packet_send_real(server, sock, force_send);
197 if (packetdata.src_id)
198 silc_free(packetdata.src_id);
199 if (packetdata.dst_id)
200 silc_free(packetdata.dst_id);
203 /* Assembles a new packet to be sent out to network. This doesn't actually
204 send the packet but creates the packet and fills the outgoing data
205 buffer and marks the packet ready to be sent to network. However, If
206 argument force_send is TRUE the packet is sent immediately and not put
207 to queue. Normal case is that the packet is not sent immediately.
208 The source and destination information is sent as argument for this
211 void silc_server_packet_send_srcdest(SilcServer server,
212 SilcSocketConnection sock,
214 SilcPacketFlags flags,
216 SilcIdType src_id_type,
218 SilcIdType dst_id_type,
223 SilcPacketContext packetdata;
224 SilcIDListData idata;
225 SilcCipher cipher = NULL;
226 SilcHmac hmac = NULL;
227 unsigned char *dst_id_data = NULL;
228 uint32 dst_id_len = 0;
229 unsigned char *src_id_data = NULL;
230 uint32 src_id_len = 0;
232 SILC_LOG_DEBUG(("Sending packet, type %d", type));
234 /* Get data used in the packet sending, keys and stuff */
235 idata = (SilcIDListData)sock->user_data;
238 dst_id_data = silc_id_id2str(dst_id, dst_id_type);
239 dst_id_len = silc_id_get_len(dst_id, dst_id_type);
243 src_id_data = silc_id_id2str(src_id, src_id_type);
244 src_id_len = silc_id_get_len(src_id, src_id_type);
247 /* Set the packet context pointers */
248 packetdata.type = type;
249 packetdata.flags = flags;
250 packetdata.src_id = src_id_data;
251 packetdata.src_id_len = src_id_len;
252 packetdata.src_id_type = src_id_type;
253 packetdata.dst_id = dst_id_data;
254 packetdata.dst_id_len = dst_id_len;
255 packetdata.dst_id_type = dst_id_type;
256 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
257 packetdata.src_id_len + dst_id_len;
258 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
260 /* Prepare outgoing data buffer for packet sending */
261 silc_packet_send_prepare(sock,
262 SILC_PACKET_HEADER_LEN +
263 packetdata.src_id_len +
264 packetdata.dst_id_len,
268 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
270 packetdata.buffer = sock->outbuf;
272 /* Put the data to the buffer */
273 if (data && data_len)
274 silc_buffer_put(sock->outbuf, data, data_len);
276 /* Create the outgoing packet */
277 silc_packet_assemble(&packetdata);
280 cipher = idata->send_key;
281 hmac = idata->hmac_send;
284 /* Encrypt the packet */
285 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
287 SILC_LOG_HEXDUMP(("Outgoing packet, len %d", sock->outbuf->len),
288 sock->outbuf->data, sock->outbuf->len);
290 /* Now actually send the packet */
291 silc_server_packet_send_real(server, sock, force_send);
293 if (packetdata.src_id)
294 silc_free(packetdata.src_id);
295 if (packetdata.dst_id)
296 silc_free(packetdata.dst_id);
299 /* Broadcast received packet to our primary route. This function is used
300 by router to further route received broadcast packet. It is expected
301 that the broadcast flag from the packet is checked before calling this
302 function. This does not test or set the broadcast flag. */
304 void silc_server_packet_broadcast(SilcServer server,
305 SilcSocketConnection sock,
306 SilcPacketContext *packet)
308 SilcBuffer buffer = packet->buffer;
309 SilcIDListData idata;
312 SILC_LOG_DEBUG(("Broadcasting received broadcast packet"));
314 /* If the packet is originated from our primary route we are
315 not allowed to send the packet. */
316 id = silc_id_str2id(packet->src_id, packet->src_id_len, packet->src_id_type);
317 if (id && !SILC_ID_SERVER_COMPARE(id, server->router->id)) {
318 idata = (SilcIDListData)sock->user_data;
320 silc_buffer_push(buffer, buffer->data - buffer->head);
321 silc_packet_send_prepare(sock, 0, 0, buffer->len);
322 silc_buffer_put(sock->outbuf, buffer->data, buffer->len);
323 silc_packet_encrypt(idata->send_key, idata->hmac_send,
324 sock->outbuf, sock->outbuf->len);
326 SILC_LOG_HEXDUMP(("Broadcasted packet, len %d", sock->outbuf->len),
327 sock->outbuf->data, sock->outbuf->len);
329 /* Now actually send the packet */
330 silc_server_packet_send_real(server, sock, TRUE);
335 SILC_LOG_DEBUG(("Will not broadcast to primary route since it is the "
336 "original sender of this packet"));
340 /* Routes received packet to `sock'. This is used to route the packets that
341 router receives but are not destined to it. */
343 void silc_server_packet_route(SilcServer server,
344 SilcSocketConnection sock,
345 SilcPacketContext *packet)
347 SilcBuffer buffer = packet->buffer;
348 SilcIDListData idata;
350 SILC_LOG_DEBUG(("Routing received packet"));
352 idata = (SilcIDListData)sock->user_data;
354 silc_buffer_push(buffer, buffer->data - buffer->head);
355 silc_packet_send_prepare(sock, 0, 0, buffer->len);
356 silc_buffer_put(sock->outbuf, buffer->data, buffer->len);
357 silc_packet_encrypt(idata->send_key, idata->hmac_send,
358 sock->outbuf, sock->outbuf->len);
360 SILC_LOG_HEXDUMP(("Routed packet, len %d", sock->outbuf->len),
361 sock->outbuf->data, sock->outbuf->len);
363 /* Now actually send the packet */
364 silc_server_packet_send_real(server, sock, TRUE);
367 /* Internal routine to actually create the channel packet and send it
368 to network. This is common function in channel message sending. If
369 `channel_message' is TRUE this encrypts the message as it is strictly
370 a channel message. If FALSE normal encryption process is used. */
373 silc_server_packet_send_to_channel_real(SilcServer server,
374 SilcSocketConnection sock,
375 SilcPacketContext *packet,
383 packet->truelen = data_len + SILC_PACKET_HEADER_LEN +
384 packet->src_id_len + packet->dst_id_len;
386 /* Prepare outgoing data buffer for packet sending */
387 silc_packet_send_prepare(sock,
388 SILC_PACKET_HEADER_LEN +
394 packet->buffer = sock->outbuf;
396 /* Put the data to buffer, assemble and encrypt the packet. The packet
397 is encrypted with normal session key shared with the client. */
398 silc_buffer_put(sock->outbuf, data, data_len);
399 silc_packet_assemble(packet);
401 silc_packet_encrypt(cipher, hmac, sock->outbuf, SILC_PACKET_HEADER_LEN +
402 packet->src_id_len + packet->dst_id_len +
405 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
407 SILC_LOG_HEXDUMP(("Channel packet, len %d", sock->outbuf->len),
408 sock->outbuf->data, sock->outbuf->len);
410 /* Now actually send the packet */
411 silc_server_packet_send_real(server, sock, force_send);
414 /* This routine is used by the server to send packets to channel. The
415 packet sent with this function is distributed to all clients on
416 the channel. Usually this is used to send notify messages to the
417 channel, things like notify about new user joining to the channel.
418 If `route' is FALSE then the packet is sent only locally and will not
419 be routed anywhere (for router locally means cell wide). If `sender'
420 is provided then the packet is not sent to that connection since it
421 originally came from it. */
423 void silc_server_packet_send_to_channel(SilcServer server,
424 SilcSocketConnection sender,
425 SilcChannelEntry channel,
432 SilcSocketConnection sock = NULL;
433 SilcPacketContext packetdata;
434 SilcClientEntry client = NULL;
435 SilcServerEntry *routed = NULL;
436 SilcChannelClientEntry chl;
437 SilcHashTableList htl;
438 SilcIDListData idata;
439 uint32 routed_count = 0;
441 /* This doesn't send channel message packets */
442 if (type == SILC_PACKET_CHANNEL_MESSAGE)
445 SILC_LOG_DEBUG(("Sending packet to channel"));
447 /* Set the packet context pointers. */
448 packetdata.flags = 0;
449 packetdata.type = type;
450 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
451 packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
452 packetdata.src_id_type = SILC_ID_SERVER;
453 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
454 packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
455 packetdata.dst_id_type = SILC_ID_CHANNEL;
456 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
457 packetdata.src_id_len + packetdata.dst_id_len;
458 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
460 /* If there are global users in the channel we will send the message
461 first to our router for further routing. */
462 if (route && server->server_type == SILC_SERVER && !server->standalone &&
463 channel->global_users) {
464 SilcServerEntry router;
466 /* Get data used in packet header encryption, keys and stuff. */
467 router = server->router;
468 sock = (SilcSocketConnection)router->connection;
469 idata = (SilcIDListData)router;
471 if (sock != sender) {
472 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
474 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
477 data, data_len, FALSE,
482 /* Send the message to clients on the channel's client list. */
483 silc_hash_table_list(channel->user_list, &htl);
484 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
485 client = chl->client;
487 /* If client has router set it is not locally connected client and
488 we will route the message to the router set in the client. Though,
489 send locally connected server in all cases. */
490 if (server->server_type == SILC_ROUTER && client && client->router &&
491 ((!route && client->router->router == server->id_entry) || route)) {
494 /* Check if we have sent the packet to this route already */
495 for (k = 0; k < routed_count; k++)
496 if (routed[k] == client->router)
498 if (k < routed_count)
501 /* Get data used in packet header encryption, keys and stuff. */
502 sock = (SilcSocketConnection)client->router->connection;
503 idata = (SilcIDListData)client->router;
505 if (sender && sock == sender)
508 /* Send the packet */
509 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
512 data, data_len, FALSE,
515 /* We want to make sure that the packet is routed to same router
516 only once. Mark this route as sent route. */
518 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
519 routed[k] = client->router;
525 if (client && client->router)
528 /* Send to locally connected client */
531 /* Get data used in packet header encryption, keys and stuff. */
532 sock = (SilcSocketConnection)client->connection;
533 idata = (SilcIDListData)client;
535 if (sender && sock == sender)
538 /* Send the packet */
539 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
542 data, data_len, FALSE,
549 silc_free(packetdata.src_id);
550 silc_free(packetdata.dst_id);
553 /* This checks whether the relayed packet came from router. If it did
554 then we'll need to encrypt it with the channel key. This is called
555 from the silc_server_packet_relay_to_channel. */
558 silc_server_packet_relay_to_channel_encrypt(SilcServer server,
559 SilcSocketConnection sock,
560 SilcChannelEntry channel,
562 unsigned int data_len)
564 /* If we are router and the packet came from router and private key
565 has not been set for the channel then we must encrypt the packet
566 as it was decrypted with the session key shared between us and the
567 router which sent it. This is so, because cells does not share the
569 if (server->server_type == SILC_ROUTER &&
570 sock->type == SILC_SOCKET_TYPE_ROUTER &&
571 !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY) &&
572 channel->channel_key) {
575 uint16 data_len, flags;
577 iv_len = silc_cipher_get_block_len(channel->channel_key);
578 if (channel->iv[0] == '\0')
579 for (i = 0; i < iv_len; i++) channel->iv[i] =
580 silc_rng_get_byte(server->rng);
582 silc_hash_make(server->md5hash, channel->iv, iv_len, channel->iv);
584 /* Encode new payload. This encrypts it also. */
585 SILC_GET16_MSB(flags, data);
586 SILC_GET16_MSB(data_len, data + 2);
587 chp = silc_channel_message_payload_encode(flags, data_len,
590 channel->channel_key,
592 memcpy(data, chp->data, chp->len);
593 silc_buffer_free(chp);
597 /* This routine is explicitly used to relay messages to some channel.
598 Packets sent with this function we have received earlier and are
599 totally encrypted. This just sends the packet to all clients on
600 the channel. If the sender of the packet is someone on the channel
601 the message will not be sent to that client. The SILC Packet header
602 is encrypted with the session key shared between us and the client.
603 MAC is also computed before encrypting the header. Rest of the
604 packet will be untouched. */
606 void silc_server_packet_relay_to_channel(SilcServer server,
607 SilcSocketConnection sender_sock,
608 SilcChannelEntry channel,
610 SilcIdType sender_type,
617 SilcSocketConnection sock = NULL;
618 SilcPacketContext packetdata;
619 SilcClientEntry client = NULL;
620 SilcServerEntry *routed = NULL;
621 SilcChannelClientEntry chl;
622 uint32 routed_count = 0;
623 SilcIDListData idata;
624 SilcHashTableList htl;
626 SILC_LOG_DEBUG(("Relaying packet to channel"));
628 /* Set the packet context pointers. */
629 packetdata.flags = 0;
630 packetdata.type = SILC_PACKET_CHANNEL_MESSAGE;
631 packetdata.src_id = silc_id_id2str(sender, sender_type);
632 packetdata.src_id_len = silc_id_get_len(sender, sender_type);
633 packetdata.src_id_type = sender_type;
634 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
635 packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
636 packetdata.dst_id_type = SILC_ID_CHANNEL;
637 packetdata.padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
638 packetdata.src_id_len +
639 packetdata.dst_id_len));
641 /* This encrypts the packet, if needed. It will be encrypted if
642 it came from the router thus it needs to be encrypted with the
643 channel key. If the channel key does not exist, then we know we
644 don't have a single local user on the channel. */
645 silc_server_packet_relay_to_channel_encrypt(server, sender_sock,
649 /* If there are global users in the channel we will send the message
650 first to our router for further routing. */
651 if (server->server_type == SILC_SERVER && !server->standalone &&
652 channel->global_users) {
653 SilcServerEntry router;
655 router = server->router;
657 /* Check that the sender is not our router. */
658 if (sender_sock != (SilcSocketConnection)router->connection) {
660 /* Get data used in packet header encryption, keys and stuff. */
661 sock = (SilcSocketConnection)router->connection;
662 idata = (SilcIDListData)router;
664 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
666 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
669 data, data_len, TRUE,
674 /* Send the message to clients on the channel's client list. */
675 silc_hash_table_list(channel->user_list, &htl);
676 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
677 client = chl->client;
681 /* If sender is one on the channel do not send it the packet. */
682 if (!found && sender_type == SILC_ID_CLIENT &&
683 SILC_ID_CLIENT_COMPARE(client->id, sender)) {
688 /* If the client has set router it means that it is not locally
689 connected client and we will route the packet further. */
690 if (server->server_type == SILC_ROUTER && client->router) {
693 /* Sender maybe server as well so we want to make sure that
694 we won't send the message to the server it came from. */
695 if (!found && SILC_ID_SERVER_COMPARE(client->router->id, sender)) {
700 /* Check if we have sent the packet to this route already */
701 for (k = 0; k < routed_count; k++)
702 if (routed[k] == client->router)
704 if (k < routed_count)
707 /* Get data used in packet header encryption, keys and stuff. */
708 sock = (SilcSocketConnection)client->router->connection;
709 idata = (SilcIDListData)client->router;
711 /* Do not send to the sender. Check first whether the true
712 sender's router is same as this client's router. Also check
713 if the sender socket is the same as this client's router
716 ((SilcClientEntry)sender_entry)->router == client->router)
718 if (sender_sock && sock == sender_sock)
721 SILC_LOG_DEBUG(("Relaying packet to client ID(%s) %s (%s)",
722 silc_id_render(client->id, SILC_ID_CLIENT),
723 sock->hostname, sock->ip));
725 /* We want to make sure that the packet is routed to same router
726 only once. Mark this route as sent route. */
728 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
729 routed[k] = client->router;
732 /* If the remote connection is router then we'll decrypt the
733 channel message and re-encrypt it with the session key shared
734 between us and the remote router. This is done because the
735 channel keys are cell specific and we have different channel
736 key than the remote router has. */
737 if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
739 /* If private key mode is not set then decrypt the packet
741 if (!(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
742 unsigned char *tmp = silc_calloc(data_len, sizeof(*data));
743 memcpy(tmp, data, data_len);
745 /* Decrypt the channel message (we don't check the MAC) */
746 /* XXX this could be optimized and removed all together by
747 taking a copy of the original data before encrypting it
748 and thus would not required decrypting. */
749 if (channel->channel_key &&
750 !silc_channel_message_payload_decrypt(tmp, data_len,
751 channel->channel_key,
753 memset(tmp, 0, data_len);
758 /* Now re-encrypt and send it to the router */
759 silc_server_packet_send_srcdest(server, sock,
760 SILC_PACKET_CHANNEL_MESSAGE, 0,
762 channel->id, SILC_ID_CHANNEL,
763 tmp, data_len, force_send);
765 /* Free the copy of the channel message */
766 memset(tmp, 0, data_len);
769 /* Private key mode is set, we don't have the channel key, so
770 just re-encrypt the entire packet and send it to the router. */
771 silc_server_packet_send_srcdest(server, sock,
772 SILC_PACKET_CHANNEL_MESSAGE, 0,
774 channel->id, SILC_ID_CHANNEL,
775 data, data_len, force_send);
780 /* Send the packet (to normal server) */
781 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
784 data, data_len, TRUE,
790 if (client && client->router)
793 /* Get data used in packet header encryption, keys and stuff. */
794 sock = (SilcSocketConnection)client->connection;
795 idata = (SilcIDListData)client;
797 if (sender_sock && sock == sender_sock)
800 SILC_LOG_DEBUG(("Sending packet to client ID(%s) %s (%s)",
801 silc_id_render(client->id, SILC_ID_CLIENT),
802 sock->hostname, sock->ip));
804 /* Send the packet */
805 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
808 data, data_len, TRUE,
813 silc_free(packetdata.src_id);
814 silc_free(packetdata.dst_id);
817 /* This function is used to send packets strictly to all local clients
818 on a particular channel. This is used for example to distribute new
819 channel key to all our locally connected clients on the channel.
820 The packets are always encrypted with the session key shared between
821 the client, this means these are not _to the channel_ but _to the client_
824 void silc_server_packet_send_local_channel(SilcServer server,
825 SilcChannelEntry channel,
827 SilcPacketFlags flags,
832 SilcChannelClientEntry chl;
833 SilcHashTableList htl;
834 SilcSocketConnection sock = NULL;
836 SILC_LOG_DEBUG(("Start"));
838 /* Send the message to clients on the channel's client list. */
839 silc_hash_table_list(channel->user_list, &htl);
840 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
841 if (chl->client && !chl->client->router) {
842 sock = (SilcSocketConnection)chl->client->connection;
844 /* Send the packet to the client */
845 silc_server_packet_send_dest(server, sock, type, flags, chl->client->id,
846 SILC_ID_CLIENT, data, data_len,
852 /* Routine used to send (relay, route) private messages to some destination.
853 If the private message key does not exist then the message is re-encrypted,
854 otherwise we just pass it along. This really is not used to send new
855 private messages (as server does not send them) but to relay received
858 void silc_server_send_private_message(SilcServer server,
859 SilcSocketConnection dst_sock,
862 SilcPacketContext *packet)
864 SilcBuffer buffer = packet->buffer;
866 /* Re-encrypt and send if private messge key does not exist */
867 if (!(packet->flags & SILC_PACKET_FLAG_PRIVMSG_KEY)) {
869 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
870 + packet->dst_id_len + packet->padlen);
871 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
872 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
874 /* Re-encrypt packet */
875 silc_packet_encrypt(cipher, hmac, dst_sock->outbuf, buffer->len);
877 /* Send the packet */
878 silc_server_packet_send_real(server, dst_sock, FALSE);
881 /* Key exist so encrypt just header and send it */
882 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
883 + packet->dst_id_len + packet->padlen);
884 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
885 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
888 silc_packet_encrypt(cipher, hmac, dst_sock->outbuf,
889 SILC_PACKET_HEADER_LEN + packet->src_id_len +
890 packet->dst_id_len + packet->padlen);
892 silc_server_packet_send_real(server, dst_sock, FALSE);
896 /* Sends current motd to client */
898 void silc_server_send_motd(SilcServer server,
899 SilcSocketConnection sock)
904 if (server->config && server->config->motd &&
905 server->config->motd->motd_file) {
907 motd = silc_file_read(server->config->motd->motd_file, &motd_len);
911 silc_server_send_notify(server, sock, FALSE, SILC_NOTIFY_TYPE_MOTD, 1,
917 /* Sends error message. Error messages may or may not have any
920 void silc_server_send_error(SilcServer server,
921 SilcSocketConnection sock,
922 const char *fmt, ...)
925 unsigned char buf[4096];
927 memset(buf, 0, sizeof(buf));
929 vsprintf(buf, fmt, ap);
932 silc_server_packet_send(server, sock, SILC_PACKET_ERROR, 0,
933 buf, strlen(buf), FALSE);
936 /* Sends notify message. If format is TRUE the variable arguments are
937 formatted and the formatted string is sent as argument payload. If it is
938 FALSE then each argument is sent as separate argument and their format
939 in the argument list must be { argument data, argument length }. */
941 void silc_server_send_notify(SilcServer server,
942 SilcSocketConnection sock,
952 packet = silc_notify_payload_encode(type, argc, ap);
953 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
954 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
955 packet->data, packet->len, FALSE);
956 silc_buffer_free(packet);
960 /* Sends notify message and gets the arguments from the `args' Argument
963 void silc_server_send_notify_args(SilcServer server,
964 SilcSocketConnection sock,
972 packet = silc_notify_payload_encode_args(type, argc, args);
973 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
974 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
975 packet->data, packet->len, FALSE);
976 silc_buffer_free(packet);
979 /* Send CHANNEL_CHANGE notify type. This tells the receiver to replace the
980 `old_id' with the `new_id'. */
982 void silc_server_send_notify_channel_change(SilcServer server,
983 SilcSocketConnection sock,
985 SilcChannelID *old_id,
986 SilcChannelID *new_id)
988 SilcBuffer idp1, idp2;
990 idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CHANNEL);
991 idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CHANNEL);
993 silc_server_send_notify(server, sock, broadcast,
994 SILC_NOTIFY_TYPE_CHANNEL_CHANGE,
995 2, idp1->data, idp1->len, idp2->data, idp2->len);
996 silc_buffer_free(idp1);
997 silc_buffer_free(idp2);
1000 /* Send NICK_CHANGE notify type. This tells the receiver to replace the
1001 `old_id' with the `new_id'. */
1003 void silc_server_send_notify_nick_change(SilcServer server,
1004 SilcSocketConnection sock,
1006 SilcClientID *old_id,
1007 SilcClientID *new_id)
1009 SilcBuffer idp1, idp2;
1011 idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CLIENT);
1012 idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CLIENT);
1014 silc_server_send_notify(server, sock, broadcast,
1015 SILC_NOTIFY_TYPE_NICK_CHANGE,
1016 2, idp1->data, idp1->len, idp2->data, idp2->len);
1017 silc_buffer_free(idp1);
1018 silc_buffer_free(idp2);
1021 /* Sends JOIN notify type. This tells that new client by `client_id' ID
1022 has joined to the `channel'. */
1024 void silc_server_send_notify_join(SilcServer server,
1025 SilcSocketConnection sock,
1027 SilcChannelEntry channel,
1028 SilcClientID *client_id)
1030 SilcBuffer idp1, idp2;
1032 idp1 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1033 idp2 = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1034 silc_server_send_notify(server, sock, broadcast, SILC_NOTIFY_TYPE_JOIN,
1035 2, idp1->data, idp1->len,
1036 idp2->data, idp2->len);
1037 silc_buffer_free(idp1);
1038 silc_buffer_free(idp2);
1041 /* Sends LEAVE notify type. This tells that `client_id' has left the
1042 `channel'. The Notify packet is always destined to the channel. */
1044 void silc_server_send_notify_leave(SilcServer server,
1045 SilcSocketConnection sock,
1047 SilcChannelEntry channel,
1048 SilcClientID *client_id)
1052 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1053 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1054 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_LEAVE,
1055 1, idp->data, idp->len);
1056 silc_buffer_free(idp);
1059 /* Sends CMODE_CHANGE notify type. This tells that `client_id' changed the
1060 `channel' mode to `mode. The Notify packet is always destined to
1063 void silc_server_send_notify_cmode(SilcServer server,
1064 SilcSocketConnection sock,
1066 SilcChannelEntry channel,
1068 void *id, SilcIdType id_type,
1069 char *cipher, char *hmac)
1072 unsigned char mode[4];
1074 idp = silc_id_payload_encode((void *)id, id_type);
1075 SILC_PUT32_MSB(mode_mask, mode);
1077 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1078 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_CMODE_CHANGE,
1079 4, idp->data, idp->len,
1081 cipher, cipher ? strlen(cipher) : 0,
1082 hmac, hmac ? strlen(hmac) : 0);
1083 silc_buffer_free(idp);
1086 /* Sends CUMODE_CHANGE notify type. This tells that `client_id' changed the
1087 `target' client's mode on `channel'. The Notify packet is always
1088 destined to the channel. */
1090 void silc_server_send_notify_cumode(SilcServer server,
1091 SilcSocketConnection sock,
1093 SilcChannelEntry channel,
1095 void *id, SilcIdType id_type,
1096 SilcClientID *target)
1098 SilcBuffer idp1, idp2;
1099 unsigned char mode[4];
1101 idp1 = silc_id_payload_encode((void *)id, id_type);
1102 idp2 = silc_id_payload_encode((void *)target, SILC_ID_CLIENT);
1103 SILC_PUT32_MSB(mode_mask, mode);
1105 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1107 SILC_NOTIFY_TYPE_CUMODE_CHANGE, 3,
1108 idp1->data, idp1->len,
1110 idp2->data, idp2->len);
1111 silc_buffer_free(idp1);
1112 silc_buffer_free(idp2);
1115 /* Sends SIGNOFF notify type. This tells that `client_id' client has
1116 left SILC network. This function is used only between server and router
1117 traffic. This is not used to send the notify to the channel for
1118 client. The `message may be NULL. */
1120 void silc_server_send_notify_signoff(SilcServer server,
1121 SilcSocketConnection sock,
1123 SilcClientID *client_id,
1128 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1129 silc_server_send_notify(server, sock, broadcast,
1130 SILC_NOTIFY_TYPE_SIGNOFF,
1131 message ? 2 : 1, idp->data, idp->len,
1132 message, message ? strlen(message): 0);
1133 silc_buffer_free(idp);
1136 /* Sends TOPIC_SET notify type. This tells that `client_id' changed
1137 the `channel's topic to `topic'. The Notify packet is always destined
1138 to the channel. This function is used to send the topic set notifies
1141 void silc_server_send_notify_topic_set(SilcServer server,
1142 SilcSocketConnection sock,
1144 SilcChannelEntry channel,
1145 SilcClientID *client_id,
1150 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1151 silc_server_send_notify(server, sock, broadcast,
1152 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
1154 idp->data, idp->len,
1155 topic, topic ? strlen(topic) : 0);
1156 silc_buffer_free(idp);
1159 /* Send KICKED notify type. This tells that the `client_id' on `channel'
1160 was kicked off the channel. The `comment' may indicate the reason
1161 for the kicking. This function is used only between server and router
1164 void silc_server_send_notify_kicked(SilcServer server,
1165 SilcSocketConnection sock,
1167 SilcChannelEntry channel,
1168 SilcClientID *client_id,
1173 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1174 silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1175 SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_KICKED,
1176 comment ? 2 : 1, idp->data, idp->len,
1177 comment, comment ? strlen(comment) : 0);
1178 silc_buffer_free(idp);
1181 /* Send KILLED notify type. This tells that the `client_id' client was
1182 killed from the network. The `comment' may indicate the reason
1185 void silc_server_send_notify_killed(SilcServer server,
1186 SilcSocketConnection sock,
1188 SilcClientID *client_id,
1193 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1194 silc_server_send_notify_dest(server, sock, broadcast, (void *)client_id,
1195 SILC_ID_CLIENT, SILC_NOTIFY_TYPE_KILLED,
1196 comment ? 2 : 1, idp->data, idp->len,
1197 comment, comment ? strlen(comment) : 0);
1198 silc_buffer_free(idp);
1201 /* Sends UMODE_CHANGE notify type. This tells that `client_id' client's
1202 user mode in the SILC Network was changed. This function is used to
1203 send the packet between routers as broadcast packet. */
1205 void silc_server_send_notify_umode(SilcServer server,
1206 SilcSocketConnection sock,
1208 SilcClientID *client_id,
1212 unsigned char mode[4];
1214 idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1215 SILC_PUT32_MSB(mode_mask, mode);
1217 silc_server_send_notify(server, sock, broadcast,
1218 SILC_NOTIFY_TYPE_UMODE_CHANGE, 2,
1219 idp->data, idp->len,
1221 silc_buffer_free(idp);
1224 /* Sends BAN notify type. This tells that ban has been either `add'ed
1225 or `del'eted on the `channel. This function is used to send the packet
1226 between routers as broadcast packet. */
1228 void silc_server_send_notify_ban(SilcServer server,
1229 SilcSocketConnection sock,
1231 SilcChannelEntry channel,
1232 char *add, char *del)
1236 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1237 silc_server_send_notify(server, sock, broadcast,
1238 SILC_NOTIFY_TYPE_BAN, 3,
1239 idp->data, idp->len,
1240 add, add ? strlen(add) : 0,
1241 del, del ? strlen(del) : 0);
1242 silc_buffer_free(idp);
1245 /* Sends INVITE notify type. This tells that invite has been either `add'ed
1246 or `del'eted on the `channel. The sender of the invite is the `client_id'.
1247 This function is used to send the packet between routers as broadcast
1250 void silc_server_send_notify_invite(SilcServer server,
1251 SilcSocketConnection sock,
1253 SilcChannelEntry channel,
1254 SilcClientID *client_id,
1255 char *add, char *del)
1257 SilcBuffer idp, idp2;
1259 idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1260 idp2 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1261 silc_server_send_notify(server, sock, broadcast,
1262 SILC_NOTIFY_TYPE_INVITE, 5,
1263 idp->data, idp->len,
1264 channel->channel_name, strlen(channel->channel_name),
1265 idp2->data, idp2->len,
1266 add, add ? strlen(add) : 0,
1267 del, del ? strlen(del) : 0);
1268 silc_buffer_free(idp);
1269 silc_buffer_free(idp2);
1272 /* Sends notify message destined to specific entity. */
1274 void silc_server_send_notify_dest(SilcServer server,
1275 SilcSocketConnection sock,
1278 SilcIdType dest_id_type,
1279 SilcNotifyType type,
1287 packet = silc_notify_payload_encode(type, argc, ap);
1288 silc_server_packet_send_dest(server, sock, SILC_PACKET_NOTIFY, 0,
1289 dest_id, dest_id_type,
1290 packet->data, packet->len, FALSE);
1291 silc_buffer_free(packet);
1295 /* Sends notify message to a channel. The notify message sent is
1296 distributed to all clients on the channel. If `route_notify' is TRUE
1297 then the notify may be routed to primary route or to some other routers.
1298 If FALSE it is assured that the notify is sent only locally. If `sender'
1299 is provided then the packet is not sent to that connection since it
1300 originally came from it. */
1302 void silc_server_send_notify_to_channel(SilcServer server,
1303 SilcSocketConnection sender,
1304 SilcChannelEntry channel,
1305 unsigned char route_notify,
1306 SilcNotifyType type,
1314 packet = silc_notify_payload_encode(type, argc, ap);
1315 silc_server_packet_send_to_channel(server, sender, channel,
1316 SILC_PACKET_NOTIFY, route_notify,
1317 packet->data, packet->len, FALSE);
1318 silc_buffer_free(packet);
1322 /* Send notify message to all channels the client has joined. It is quaranteed
1323 that the message is sent only once to a client (ie. if a client is joined
1324 on two same channel it will receive only one notify message). Also, this
1325 sends only to local clients (locally connected if we are server, and to
1326 local servers if we are router). If `sender' is provided the packet is
1327 not sent to that client at all. */
1329 void silc_server_send_notify_on_channels(SilcServer server,
1330 SilcClientEntry sender,
1331 SilcClientEntry client,
1332 SilcNotifyType type,
1336 SilcSocketConnection sock = NULL;
1337 SilcPacketContext packetdata;
1339 SilcClientEntry *sent_clients = NULL;
1340 uint32 sent_clients_count = 0;
1341 SilcServerEntry *routed = NULL;
1342 uint32 routed_count = 0;
1343 SilcHashTableList htl, htl2;
1344 SilcChannelEntry channel;
1345 SilcChannelClientEntry chl, chl2;
1346 SilcIDListData idata;
1348 unsigned char *data;
1350 int force_send = FALSE;
1353 SILC_LOG_DEBUG(("Start"));
1355 if (!silc_hash_table_count(client->channels))
1359 packet = silc_notify_payload_encode(type, argc, ap);
1360 data = packet->data;
1361 data_len = packet->len;
1363 /* Set the packet context pointers. */
1364 packetdata.flags = 0;
1365 packetdata.type = SILC_PACKET_NOTIFY;
1366 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
1367 packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1368 packetdata.src_id_type = SILC_ID_SERVER;
1370 silc_hash_table_list(client->channels, &htl);
1371 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
1372 channel = chl->channel;
1374 /* Send the message to all clients on the channel's client list. */
1375 silc_hash_table_list(channel->user_list, &htl2);
1376 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
1379 if (sender && c == sender)
1382 /* Check if we have sent the packet to this client already */
1383 for (k = 0; k < sent_clients_count; k++)
1384 if (sent_clients[k] == c)
1386 if (k < sent_clients_count)
1389 /* If we are router and if this client has router set it is not
1390 locally connected client and we will route the message to the
1391 router set in the client. */
1392 if (c && c->router && server->server_type == SILC_ROUTER) {
1393 /* Check if we have sent the packet to this route already */
1394 for (k = 0; k < routed_count; k++)
1395 if (routed[k] == c->router)
1397 if (k < routed_count)
1400 /* Get data used in packet header encryption, keys and stuff. */
1401 sock = (SilcSocketConnection)c->router->connection;
1402 idata = (SilcIDListData)c->router;
1404 packetdata.dst_id = silc_id_id2str(c->router->id, SILC_ID_SERVER);
1405 packetdata.dst_id_len = silc_id_get_len(c->router->id, SILC_ID_SERVER);
1406 packetdata.dst_id_type = SILC_ID_SERVER;
1407 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1408 packetdata.src_id_len + packetdata.dst_id_len;
1409 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1411 /* Send the packet */
1412 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1415 data, data_len, FALSE,
1418 silc_free(packetdata.dst_id);
1420 /* We want to make sure that the packet is routed to same router
1421 only once. Mark this route as sent route. */
1423 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
1424 routed[k] = c->router;
1433 /* Send to locally connected client */
1436 /* Get data used in packet header encryption, keys and stuff. */
1437 sock = (SilcSocketConnection)c->connection;
1438 idata = (SilcIDListData)c;
1440 packetdata.dst_id = silc_id_id2str(c->id, SILC_ID_CLIENT);
1441 packetdata.dst_id_len = silc_id_get_len(c->id, SILC_ID_CLIENT);
1442 packetdata.dst_id_type = SILC_ID_CLIENT;
1443 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1444 packetdata.src_id_len + packetdata.dst_id_len;
1445 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1447 /* Send the packet */
1448 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1451 data, data_len, FALSE,
1454 silc_free(packetdata.dst_id);
1456 /* Make sure that we send the notify only once per client. */
1457 sent_clients = silc_realloc(sent_clients, sizeof(*sent_clients) *
1458 (sent_clients_count + 1));
1459 sent_clients[sent_clients_count] = c;
1460 sent_clients_count++;
1467 if (sent_clients_count)
1468 silc_free(sent_clients);
1469 silc_free(packetdata.src_id);
1473 /* Sends New ID Payload to remote end. The packet is used to distribute
1474 information about new registered clients, servers, channel etc. usually
1475 to routers so that they can keep these information up to date.
1476 If the argument `broadcast' is TRUE then the packet is sent as
1477 broadcast packet. */
1479 void silc_server_send_new_id(SilcServer server,
1480 SilcSocketConnection sock,
1482 void *id, SilcIdType id_type,
1487 SILC_LOG_DEBUG(("Start"));
1489 idp = silc_id_payload_encode(id, id_type);
1490 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID,
1491 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1492 idp->data, idp->len, FALSE);
1493 silc_buffer_free(idp);
1496 /* Send New Channel Payload to notify about newly created channel in the
1497 SILC network. Normal server nevers sends this packet. Router uses this
1498 to notify other routers in the network about new channel. This packet
1501 void silc_server_send_new_channel(SilcServer server,
1502 SilcSocketConnection sock,
1506 uint32 channel_id_len,
1511 uint32 name_len = strlen(channel_name);
1513 SILC_LOG_DEBUG(("Start"));
1515 cid = silc_id_id2str(channel_id, SILC_ID_CHANNEL);
1519 /* Encode the channel payload */
1520 packet = silc_channel_payload_encode(channel_name, name_len,
1521 cid, channel_id_len, mode);
1523 silc_server_packet_send(server, sock, SILC_PACKET_NEW_CHANNEL,
1524 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1525 packet->data, packet->len, FALSE);
1528 silc_buffer_free(packet);
1531 /* Send Channel Key payload to distribute the new channel key. Normal server
1532 sends this to router when new client joins to existing channel. Router
1533 sends this to the local server who sent the join command in case where
1534 the channel did not exist yet. Both normal and router servers uses this
1535 also to send this to locally connected clients on the channel. This
1536 must not be broadcasted packet. Routers do not send this to each other.
1537 If `sender is provided then the packet is not sent to that connection since
1538 it originally came from it. */
1540 void silc_server_send_channel_key(SilcServer server,
1541 SilcSocketConnection sender,
1542 SilcChannelEntry channel,
1543 unsigned char route)
1546 unsigned char *chid;
1549 SILC_LOG_DEBUG(("Start"));
1551 chid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1555 /* Encode channel key packet */
1556 tmp_len = strlen(channel->channel_key->cipher->name);
1557 packet = silc_channel_key_payload_encode(silc_id_get_len(channel->id,
1560 channel->channel_key->cipher->name,
1561 channel->key_len / 8, channel->key);
1563 silc_server_packet_send_to_channel(server, sender, channel,
1564 SILC_PACKET_CHANNEL_KEY,
1565 route, packet->data, packet->len, FALSE);
1566 silc_buffer_free(packet);
1570 /* Generic function to send any command. The arguments must be sent already
1571 encoded into correct form in correct order. */
1573 void silc_server_send_command(SilcServer server,
1574 SilcSocketConnection sock,
1575 SilcCommand command,
1584 packet = silc_command_payload_encode_vap(command, ident, argc, ap);
1585 silc_server_packet_send(server, sock, SILC_PACKET_COMMAND, 0,
1586 packet->data, packet->len, TRUE);
1587 silc_buffer_free(packet);
1591 /* Send the heartbeat packet. */
1593 void silc_server_send_heartbeat(SilcServer server,
1594 SilcSocketConnection sock)
1596 silc_server_packet_send(server, sock, SILC_PACKET_HEARTBEAT, 0,
1600 /* Generic function to relay packet we've received. This is used to relay
1601 packets to a client but generally can be used to other purposes as well. */
1603 void silc_server_relay_packet(SilcServer server,
1604 SilcSocketConnection dst_sock,
1607 SilcPacketContext *packet,
1610 silc_buffer_push(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1611 + packet->dst_id_len + packet->padlen);
1613 silc_packet_send_prepare(dst_sock, 0, 0, packet->buffer->len);
1614 silc_buffer_put(dst_sock->outbuf, packet->buffer->data, packet->buffer->len);
1616 /* Re-encrypt packet */
1617 silc_packet_encrypt(cipher, hmac, dst_sock->outbuf, packet->buffer->len);
1619 /* Send the packet */
1620 silc_server_packet_send_real(server, dst_sock, force_send);
1622 silc_buffer_pull(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1623 + packet->dst_id_len + packet->padlen);
1626 /* Routine used to send the connection authentication packet. */
1628 void silc_server_send_connection_auth_request(SilcServer server,
1629 SilcSocketConnection sock,
1631 SilcAuthMethod auth_meth)
1635 packet = silc_buffer_alloc(4);
1636 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1637 silc_buffer_format(packet,
1638 SILC_STR_UI_SHORT(conn_type),
1639 SILC_STR_UI_SHORT(auth_meth),
1642 silc_server_packet_send(server, sock, SILC_PACKET_CONNECTION_AUTH_REQUEST,
1643 0, packet->data, packet->len, FALSE);
1644 silc_buffer_free(packet);