apps/silcd/packet_send.c

   1 /*
   2
   3   packet_send.c
   4
   5   Author: Pekka Riikonen <priikone@silcnet.org>
   6
   7   Copyright (C) 1997 - 2001 Pekka Riikonen
   8
   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.
  13
  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.
  18
  19 */
  20 /*
  21  * Server packet routines to send packets.
  22  */
  23 /* $Id$ */
  24
  25 #include "serverincludes.h"
  26 #include "server_internal.h"
  27
  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. */
  31
  32 int silc_server_packet_send_real(SilcServer server,
  33                                  SilcSocketConnection sock,
  34                                  bool force_send)
  35 {
  36   int ret;
  37
  38   /* If disconnecting, ignore the data */
  39   if (SILC_IS_DISCONNECTING(sock))
  40     return -1;
  41
  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))
  45     force_send = FALSE;
  46
  47   /* If outbound data is already pending do not force send */
  48   if (SILC_IS_OUTBUF_PENDING(sock))
  49     force_send = FALSE;
  50
  51   /* Send the packet */
  52   ret = silc_packet_send(sock, force_send);
  53   if (ret != -2)
  54     return ret;
  55
  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);
  61
  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);
  66
  67   return 0;
  68 }
  69
  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. */
  75
  76 void silc_server_packet_send(SilcServer server,
  77                              SilcSocketConnection sock,
  78                              SilcPacketType type,
  79                              SilcPacketFlags flags,
  80                              unsigned char *data,
  81                              uint32 data_len,
  82                              bool force_send)
  83 {
  84   void *dst_id = NULL;
  85   SilcIdType dst_id_type = SILC_ID_NONE;
  86   SilcIDListData idata = (SilcIDListData)sock->user_data;
  87
  88   if (!sock)
  89     return;
  90
  91   /* If disconnecting, ignore the data */
  92   if (SILC_IS_DISCONNECTING(sock))
  93     return;
  94
  95   /* If entry is disabled do not sent anything. */
  96   if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED)
  97     return;
  98
  99   /* Get data used in the packet sending, keys and stuff */
 100   switch(sock->type) {
 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;
 105     }
 106     break;
 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;
 112     }
 113     break;
 114   default:
 115     break;
 116   }
 117
 118   silc_server_packet_send_dest(server, sock, type, flags, dst_id,
 119                                dst_id_type, data, data_len, force_send);
 120 }
 121
 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. */
 128
 129 void silc_server_packet_send_dest(SilcServer server,
 130                                   SilcSocketConnection sock,
 131                                   SilcPacketType type,
 132                                   SilcPacketFlags flags,
 133                                   void *dst_id,
 134                                   SilcIdType dst_id_type,
 135                                   unsigned char *data,
 136                                   uint32 data_len,
 137                                   bool force_send)
 138 {
 139   SilcPacketContext packetdata;
 140   SilcIDListData idata = (SilcIDListData)sock->user_data;
 141   SilcCipher cipher = NULL;
 142   SilcHmac hmac = NULL;
 143   uint32 sequence = 0;
 144   unsigned char *dst_id_data = NULL;
 145   uint32 dst_id_len = 0;
 146   int block_len = 0;
 147
 148   /* If disconnecting, ignore the data */
 149   if (SILC_IS_DISCONNECTING(sock))
 150     return;
 151
 152   /* If entry is disabled do not sent anything. */
 153   if (idata && idata->status & SILC_IDLIST_STATUS_DISABLED)
 154     return;
 155
 156   SILC_LOG_DEBUG(("Sending packet, type %d", type));
 157
 158   if (dst_id) {
 159     dst_id_data = silc_id_id2str(dst_id, dst_id_type);
 160     dst_id_len = silc_id_get_len(dst_id, dst_id_type);
 161   }
 162
 163   if (idata) {
 164     cipher = idata->send_key;
 165     hmac = idata->hmac_send;
 166     sequence = idata->psn_send++;
 167     block_len = silc_cipher_get_block_len(cipher);
 168   }
 169
 170   /* Set the packet context pointers */
 171   packetdata.type = type;
 172   packetdata.flags = flags;
 173   packetdata.src_id = silc_id_id2str(server->id, server->id_type);
 174   packetdata.src_id_len = silc_id_get_len(server->id, server->id_type);
 175   packetdata.src_id_type = server->id_type;
 176   packetdata.dst_id = dst_id_data;
 177   packetdata.dst_id_len = dst_id_len;
 178   packetdata.dst_id_type = dst_id_type;
 179   packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
 180     packetdata.src_id_len + dst_id_len;
 181   packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen, block_len);
 182
 183   /* Prepare outgoing data buffer for packet sending */
 184   silc_packet_send_prepare(sock,
 185                            SILC_PACKET_HEADER_LEN +
 186                            packetdata.src_id_len +
 187                            packetdata.dst_id_len,
 188                            packetdata.padlen,
 189                            data_len);
 190
 191   SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
 192
 193   packetdata.buffer = sock->outbuf;
 194
 195   /* Put the data to the buffer */
 196   if (data && data_len)
 197     silc_buffer_put(sock->outbuf, data, data_len);
 198
 199   /* Create the outgoing packet */
 200   silc_packet_assemble(&packetdata, cipher);
 201
 202   /* Encrypt the packet */
 203   silc_packet_encrypt(cipher, hmac, sequence, sock->outbuf, sock->outbuf->len);
 204
 205   SILC_LOG_HEXDUMP(("Outgoing packet (%d), len %d", sequence,
 206                     sock->outbuf->len),
 207                    sock->outbuf->data, sock->outbuf->len);
 208
 209   /* Now actually send the packet */
 210   silc_server_packet_send_real(server, sock, force_send);
 211
 212   if (packetdata.src_id)
 213     silc_free(packetdata.src_id);
 214   if (packetdata.dst_id)
 215     silc_free(packetdata.dst_id);
 216 }
 217
 218 /* Assembles a new packet to be sent out to network. This doesn't actually
 219    send the packet but creates the packet and fills the outgoing data
 220    buffer and marks the packet ready to be sent to network. However, If
 221    argument force_send is TRUE the packet is sent immediately and not put
 222    to queue. Normal case is that the packet is not sent immediately.
 223    The source and destination information is sent as argument for this
 224    function. */
 225
 226 void silc_server_packet_send_srcdest(SilcServer server,
 227                                      SilcSocketConnection sock,
 228                                      SilcPacketType type,
 229                                      SilcPacketFlags flags,
 230                                      void *src_id,
 231                                      SilcIdType src_id_type,
 232                                      void *dst_id,
 233                                      SilcIdType dst_id_type,
 234                                      unsigned char *data,
 235                                      uint32 data_len,
 236                                      bool force_send)
 237 {
 238   SilcPacketContext packetdata;
 239   SilcIDListData idata;
 240   SilcCipher cipher = NULL;
 241   SilcHmac hmac = NULL;
 242   uint32 sequence = 0;
 243   unsigned char *dst_id_data = NULL;
 244   uint32 dst_id_len = 0;
 245   unsigned char *src_id_data = NULL;
 246   uint32 src_id_len = 0;
 247   int block_len = 0;
 248
 249   SILC_LOG_DEBUG(("Sending packet, type %d", type));
 250
 251   /* Get data used in the packet sending, keys and stuff */
 252   idata = (SilcIDListData)sock->user_data;
 253
 254   if (dst_id) {
 255     dst_id_data = silc_id_id2str(dst_id, dst_id_type);
 256     dst_id_len = silc_id_get_len(dst_id, dst_id_type);
 257   }
 258
 259   if (src_id) {
 260     src_id_data = silc_id_id2str(src_id, src_id_type);
 261     src_id_len = silc_id_get_len(src_id, src_id_type);
 262   }
 263
 264   if (idata) {
 265     cipher = idata->send_key;
 266     hmac = idata->hmac_send;
 267     sequence = idata->psn_send++;
 268     block_len = silc_cipher_get_block_len(cipher);
 269   }
 270
 271   /* Set the packet context pointers */
 272   packetdata.type = type;
 273   packetdata.flags = flags;
 274   packetdata.src_id = src_id_data;
 275   packetdata.src_id_len = src_id_len;
 276   packetdata.src_id_type = src_id_type;
 277   packetdata.dst_id = dst_id_data;
 278   packetdata.dst_id_len = dst_id_len;
 279   packetdata.dst_id_type = dst_id_type;
 280   packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
 281     packetdata.src_id_len + dst_id_len;
 282   packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen, block_len);
 283
 284   /* Prepare outgoing data buffer for packet sending */
 285   silc_packet_send_prepare(sock,
 286                            SILC_PACKET_HEADER_LEN +
 287                            packetdata.src_id_len +
 288                            packetdata.dst_id_len,
 289                            packetdata.padlen,
 290                            data_len);
 291
 292   SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
 293
 294   packetdata.buffer = sock->outbuf;
 295
 296   /* Put the data to the buffer */
 297   if (data && data_len)
 298     silc_buffer_put(sock->outbuf, data, data_len);
 299
 300   /* Create the outgoing packet */
 301   silc_packet_assemble(&packetdata, cipher);
 302
 303   /* Encrypt the packet */
 304   silc_packet_encrypt(cipher, hmac, sequence, sock->outbuf, sock->outbuf->len);
 305
 306   SILC_LOG_HEXDUMP(("Outgoing packet (%d), len %d", sequence,
 307                     sock->outbuf->len),
 308                    sock->outbuf->data, sock->outbuf->len);
 309
 310   /* Now actually send the packet */
 311   silc_server_packet_send_real(server, sock, force_send);
 312
 313   if (packetdata.src_id)
 314     silc_free(packetdata.src_id);
 315   if (packetdata.dst_id)
 316     silc_free(packetdata.dst_id);
 317 }
 318
 319 /* Broadcast received packet to our primary route. This function is used
 320    by router to further route received broadcast packet. It is expected
 321    that the broadcast flag from the packet is checked before calling this
 322    function. This does not test or set the broadcast flag. */
 323
 324 void silc_server_packet_broadcast(SilcServer server,
 325                                   SilcSocketConnection sock,
 326                                   SilcPacketContext *packet)
 327 {
 328   SilcBuffer buffer = packet->buffer;
 329   SilcIDListData idata;
 330   void *id;
 331
 332   SILC_LOG_DEBUG(("Broadcasting received broadcast packet"));
 333
 334   /* If the packet is originated from our primary route we are
 335      not allowed to send the packet. */
 336   id = silc_id_str2id(packet->src_id, packet->src_id_len, packet->src_id_type);
 337   if (id && !SILC_ID_SERVER_COMPARE(id, server->router->id)) {
 338     idata = (SilcIDListData)sock->user_data;
 339
 340     silc_buffer_push(buffer, buffer->data - buffer->head);
 341     silc_packet_send_prepare(sock, 0, 0, buffer->len);
 342     silc_buffer_put(sock->outbuf, buffer->data, buffer->len);
 343     silc_packet_encrypt(idata->send_key, idata->hmac_send, idata->psn_send++,
 344                         sock->outbuf, sock->outbuf->len);
 345
 346     SILC_LOG_HEXDUMP(("Broadcasted packet (%d), len %d", idata->psn_send - 1,
 347                       sock->outbuf->len),
 348                      sock->outbuf->data, sock->outbuf->len);
 349
 350     /* Now actually send the packet */
 351     silc_server_packet_send_real(server, sock, TRUE);
 352     silc_free(id);
 353     return;
 354   }
 355
 356   SILC_LOG_DEBUG(("Will not broadcast to primary route since it is the "
 357                   "original sender of this packet"));
 358   silc_free(id);
 359 }
 360
 361 /* Routes received packet to `sock'. This is used to route the packets that
 362    router receives but are not destined to it. */
 363
 364 void silc_server_packet_route(SilcServer server,
 365                               SilcSocketConnection sock,
 366                               SilcPacketContext *packet)
 367 {
 368   SilcBuffer buffer = packet->buffer;
 369   SilcIDListData idata;
 370
 371   SILC_LOG_DEBUG(("Routing received packet"));
 372
 373   idata = (SilcIDListData)sock->user_data;
 374
 375   silc_buffer_push(buffer, buffer->data - buffer->head);
 376   silc_packet_send_prepare(sock, 0, 0, buffer->len);
 377   silc_buffer_put(sock->outbuf, buffer->data, buffer->len);
 378   silc_packet_encrypt(idata->send_key, idata->hmac_send, idata->psn_send++,
 379                       sock->outbuf, sock->outbuf->len);
 380
 381   SILC_LOG_HEXDUMP(("Routed packet (%d), len %d", idata->psn_send - 1,
 382                     sock->outbuf->len),
 383                    sock->outbuf->data, sock->outbuf->len);
 384
 385   /* Now actually send the packet */
 386   silc_server_packet_send_real(server, sock, TRUE);
 387 }
 388
 389 /* This routine can be used to send a packet to table of clients provided
 390    in `clients'. If `route' is FALSE the packet is routed only to local
 391    clients (for server locally connected, and for router local cell). */
 392
 393 void silc_server_packet_send_clients(SilcServer server,
 394                                      SilcClientEntry *clients,
 395                                      uint32 clients_count,
 396                                      SilcPacketType type,
 397                                      SilcPacketFlags flags,
 398                                      bool route,
 399                                      unsigned char *data,
 400                                      uint32 data_len,
 401                                      bool force_send)
 402 {
 403   SilcSocketConnection sock = NULL;
 404   SilcClientEntry client = NULL;
 405   SilcServerEntry *routed = NULL;
 406   uint32 routed_count = 0;
 407   bool gone = FALSE;
 408   int i, k;
 409
 410   SILC_LOG_DEBUG(("Sending packet to list of clients"));
 411
 412   /* Send to all clients in table */
 413   for (i = 0; i < clients_count; i++) {
 414     client = clients[i];
 415
 416     /* If client has router set it is not locally connected client and
 417        we will route the message to the router set in the client. Though,
 418        send locally connected server in all cases. */
 419     if (server->server_type == SILC_ROUTER && client->router &&
 420         ((!route && client->router->router == server->id_entry) || route)) {
 421
 422       /* Check if we have sent the packet to this route already */
 423       for (k = 0; k < routed_count; k++)
 424         if (routed[k] == client->router)
 425           break;
 426       if (k < routed_count)
 427         continue;
 428
 429       /* Route only once to router */
 430       sock = (SilcSocketConnection)client->router->connection;
 431       if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
 432         if (gone)
 433           continue;
 434         gone = TRUE;
 435       }
 436
 437       /* Send the packet */
 438       silc_server_packet_send_dest(server, sock, type, flags,
 439                                    client->router->id, SILC_ID_SERVER,
 440                                    data, data_len, force_send);
 441
 442       /* Mark this route routed already */
 443       routed = silc_realloc(routed, sizeof(*routed) * (routed_count + 1));
 444       routed[routed_count++] = client->router;
 445       continue;
 446     }
 447
 448     if (client->router)
 449       continue;
 450
 451     /* Send to locally connected client */
 452     sock = (SilcSocketConnection)client->connection;
 453     silc_server_packet_send_dest(server, sock, type, flags,
 454                                  client->id, SILC_ID_CLIENT,
 455                                  data, data_len, force_send);
 456   }
 457
 458   silc_free(routed);
 459 }
 460
 461 /* Internal routine to actually create the channel packet and send it
 462    to network. This is common function in channel message sending. If
 463    `channel_message' is TRUE this encrypts the message as it is strictly
 464    a channel message. If FALSE normal encryption process is used. */
 465
 466 static void
 467 silc_server_packet_send_to_channel_real(SilcServer server,
 468                                         SilcSocketConnection sock,
 469                                         SilcPacketContext *packet,
 470                                         SilcCipher cipher,
 471                                         SilcHmac hmac,
 472                                         uint32 sequence,
 473                                         unsigned char *data,
 474                                         uint32 data_len,
 475                                         bool channel_message,
 476                                         bool force_send)
 477 {
 478   int block_len;
 479   packet->truelen = data_len + SILC_PACKET_HEADER_LEN +
 480     packet->src_id_len + packet->dst_id_len;
 481
 482   block_len = cipher ? silc_cipher_get_block_len(cipher) : 0;
 483   if (channel_message)
 484     packet->padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
 485                                          packet->src_id_len +
 486                                          packet->dst_id_len), block_len);
 487   else
 488     packet->padlen = SILC_PACKET_PADLEN(packet->truelen, block_len);
 489
 490   /* Prepare outgoing data buffer for packet sending */
 491   silc_packet_send_prepare(sock,
 492                            SILC_PACKET_HEADER_LEN +
 493                            packet->src_id_len +
 494                            packet->dst_id_len,
 495                            packet->padlen,
 496                            data_len);
 497
 498   packet->buffer = sock->outbuf;
 499
 500   /* Put the data to buffer, assemble and encrypt the packet. The packet
 501      is encrypted with normal session key shared with the client, unless
 502      the `channel_message' is TRUE. */
 503   silc_buffer_put(sock->outbuf, data, data_len);
 504   silc_packet_assemble(packet, cipher);
 505   if (channel_message)
 506     silc_packet_encrypt(cipher, hmac, sequence, sock->outbuf,
 507                         SILC_PACKET_HEADER_LEN + packet->src_id_len +
 508                         packet->dst_id_len + packet->padlen);
 509   else
 510     silc_packet_encrypt(cipher, hmac, sequence, sock->outbuf,
 511                         sock->outbuf->len);
 512
 513   SILC_LOG_HEXDUMP(("Channel packet (%d), len %d", sequence,
 514                     sock->outbuf->len),
 515                    sock->outbuf->data, sock->outbuf->len);
 516
 517   /* Now actually send the packet */
 518   silc_server_packet_send_real(server, sock, force_send);
 519 }
 520
 521 /* This routine is used by the server to send packets to channel. The
 522    packet sent with this function is distributed to all clients on
 523    the channel. Usually this is used to send notify messages to the
 524    channel, things like notify about new user joining to the channel.
 525    If `route' is FALSE then the packet is sent only locally and will not
 526    be routed anywhere (for router locally means cell wide). If `sender'
 527    is provided then the packet is not sent to that connection since it
 528    originally came from it. If `send_to_clients' is FALSE then the
 529    packet is not sent clients, only servers. */
 530
 531 void silc_server_packet_send_to_channel(SilcServer server,
 532                                         SilcSocketConnection sender,
 533                                         SilcChannelEntry channel,
 534                                         SilcPacketType type,
 535                                         bool route,
 536                                         unsigned char *data,
 537                                         uint32 data_len,
 538                                         bool force_send)
 539 {
 540   SilcSocketConnection sock = NULL;
 541   SilcPacketContext packetdata;
 542   SilcClientEntry client = NULL;
 543   SilcServerEntry *routed = NULL;
 544   SilcChannelClientEntry chl;
 545   SilcHashTableList htl;
 546   SilcIDListData idata;
 547   uint32 routed_count = 0;
 548   bool gone = FALSE;
 549   int k;
 550
 551   /* This doesn't send channel message packets */
 552   assert(type != SILC_PACKET_CHANNEL_MESSAGE);
 553
 554   SILC_LOG_DEBUG(("Sending packet to channel"));
 555
 556   /* Set the packet context pointers. */
 557   packetdata.flags = 0;
 558   packetdata.type = type;
 559   packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
 560   packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
 561   packetdata.src_id_type = SILC_ID_SERVER;
 562   packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
 563   packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
 564   packetdata.dst_id_type = SILC_ID_CHANNEL;
 565
 566   /* If there are global users in the channel we will send the message
 567      first to our router for further routing. */
 568   if (route && server->server_type != SILC_ROUTER && !server->standalone &&
 569       channel->global_users) {
 570     SilcServerEntry router;
 571
 572     /* Get data used in packet header encryption, keys and stuff. */
 573     router = server->router;
 574     sock = (SilcSocketConnection)router->connection;
 575     idata = (SilcIDListData)router;
 576
 577     if (sock != sender) {
 578       SILC_LOG_DEBUG(("Sending packet to router for routing"));
 579
 580       silc_server_packet_send_to_channel_real(server, sock, &packetdata,
 581                                               idata->send_key,
 582                                               idata->hmac_send,
 583                                               idata->psn_send++,
 584                                               data, data_len, FALSE,
 585                                               force_send);
 586     }
 587   }
 588
 589   routed = silc_calloc(silc_hash_table_count(channel->user_list),
 590                        sizeof(*routed));
 591
 592   /* Send the message to clients on the channel's client list. */
 593   silc_hash_table_list(channel->user_list, &htl);
 594   while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
 595     client = chl->client;
 596     if (!client)
 597       continue;
 598
 599     /* If client has router set it is not locally connected client and
 600        we will route the message to the router set in the client. Though,
 601        send locally connected server in all cases. */
 602     if (server->server_type == SILC_ROUTER && client->router &&
 603         ((!route && client->router->router == server->id_entry) || route)) {
 604
 605       /* Check if we have sent the packet to this route already */
 606       for (k = 0; k < routed_count; k++)
 607         if (routed[k] == client->router)
 608           break;
 609       if (k < routed_count)
 610         continue;
 611
 612       /* Get data used in packet header encryption, keys and stuff. */
 613       sock = (SilcSocketConnection)client->router->connection;
 614       idata = (SilcIDListData)client->router;
 615
 616       if (sender && sock == sender)
 617         continue;
 618
 619       /* Route only once to router */
 620       if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
 621         if (gone)
 622           continue;
 623         gone = TRUE;
 624       }
 625
 626       /* Send the packet */
 627       silc_server_packet_send_to_channel_real(server, sock, &packetdata,
 628                                               idata->send_key,
 629                                               idata->hmac_send,
 630                                               idata->psn_send++,
 631                                               data, data_len, FALSE,
 632                                               force_send);
 633
 634       /* Mark this route routed already */
 635       routed[routed_count++] = client->router;
 636       continue;
 637     }
 638
 639     if (client->router)
 640       continue;
 641
 642     /* Send to locally connected client */
 643
 644     /* Get data used in packet header encryption, keys and stuff. */
 645     sock = (SilcSocketConnection)client->connection;
 646     idata = (SilcIDListData)client;
 647
 648     if (sender && sock == sender)
 649       continue;
 650
 651     /* Send the packet */
 652     silc_server_packet_send_to_channel_real(server, sock, &packetdata,
 653                                             idata->send_key,
 654                                             idata->hmac_send,
 655                                             idata->psn_send++,
 656                                             data, data_len, FALSE,
 657                                             force_send);
 658   }
 659
 660   silc_free(routed);
 661   silc_free(packetdata.src_id);
 662   silc_free(packetdata.dst_id);
 663 }
 664
 665 /* This checks whether the relayed packet came from router. If it did
 666    then we'll need to encrypt it with the channel key. This is called
 667    from the silc_server_packet_relay_to_channel. */
 668
 669 static bool
 670 silc_server_packet_relay_to_channel_encrypt(SilcServer server,
 671                                             SilcSocketConnection sock,
 672                                             SilcChannelEntry channel,
 673                                             unsigned char *data,
 674                                             unsigned int data_len)
 675 {
 676   /* If we are router and the packet came from router and private key
 677      has not been set for the channel then we must encrypt the packet
 678      as it was decrypted with the session key shared between us and the
 679      router which sent it. This is so, because cells does not share the
 680      same channel key. */
 681   if (server->server_type == SILC_ROUTER &&
 682       sock->type == SILC_SOCKET_TYPE_ROUTER &&
 683       !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY) &&
 684       channel->channel_key) {
 685     SilcBuffer chp;
 686     uint32 iv_len, i;
 687     uint16 dlen, flags;
 688
 689     iv_len = silc_cipher_get_block_len(channel->channel_key);
 690     if (channel->iv[0] == '\0')
 691       for (i = 0; i < iv_len; i++) channel->iv[i] =
 692                                      silc_rng_get_byte(server->rng);
 693     else
 694       silc_hash_make(server->md5hash, channel->iv, iv_len, channel->iv);
 695
 696     /* Encode new payload. This encrypts it also. */
 697     SILC_GET16_MSB(flags, data);
 698     SILC_GET16_MSB(dlen, data + 2);
 699
 700     if (dlen > data_len) {
 701       SILC_LOG_WARNING(("Corrupted channel message, cannot relay it"));
 702       return FALSE;
 703     }
 704
 705     chp = silc_channel_message_payload_encode(flags, dlen, data + 4,
 706                                               iv_len, channel->iv,
 707                                               channel->channel_key,
 708                                               channel->hmac);
 709     memcpy(data, chp->data, chp->len);
 710     silc_buffer_free(chp);
 711   }
 712
 713   return TRUE;
 714 }
 715
 716 /* This routine is explicitly used to relay messages to some channel.
 717    Packets sent with this function we have received earlier and are
 718    totally encrypted. This just sends the packet to all clients on
 719    the channel. If the sender of the packet is someone on the channel
 720    the message will not be sent to that client. The SILC Packet header
 721    is encrypted with the session key shared between us and the client.
 722    MAC is also computed before encrypting the header. Rest of the
 723    packet will be untouched. */
 724
 725 void silc_server_packet_relay_to_channel(SilcServer server,
 726                                          SilcSocketConnection sender_sock,
 727                                          SilcChannelEntry channel,
 728                                          void *sender,
 729                                          SilcIdType sender_type,
 730                                          void *sender_entry,
 731                                          unsigned char *data,
 732                                          uint32 data_len,
 733                                          bool force_send)
 734 {
 735   bool found = FALSE;
 736   SilcSocketConnection sock = NULL;
 737   SilcPacketContext packetdata;
 738   SilcClientEntry client = NULL;
 739   SilcServerEntry *routed = NULL;
 740   SilcChannelClientEntry chl;
 741   uint32 routed_count = 0;
 742   SilcIDListData idata;
 743   SilcHashTableList htl;
 744   bool gone = FALSE;
 745   int k;
 746
 747   SILC_LOG_DEBUG(("Relaying packet to channel"));
 748
 749   /* This encrypts the packet, if needed. It will be encrypted if
 750      it came from the router thus it needs to be encrypted with the
 751      channel key. If the channel key does not exist, then we know we
 752      don't have a single local user on the channel. */
 753   if (!silc_server_packet_relay_to_channel_encrypt(server, sender_sock,
 754                                                    channel, data,
 755                                                    data_len))
 756     return;
 757
 758   /* Set the packet context pointers. */
 759   packetdata.flags = 0;
 760   packetdata.type = SILC_PACKET_CHANNEL_MESSAGE;
 761   packetdata.src_id = silc_id_id2str(sender, sender_type);
 762   packetdata.src_id_len = silc_id_get_len(sender, sender_type);
 763   packetdata.src_id_type = sender_type;
 764   packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
 765   packetdata.dst_id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
 766   packetdata.dst_id_type = SILC_ID_CHANNEL;
 767
 768   /* If there are global users in the channel we will send the message
 769      first to our router for further routing. */
 770   if (server->server_type != SILC_ROUTER && !server->standalone &&
 771       channel->global_users) {
 772     SilcServerEntry router = server->router;
 773
 774     /* Check that the sender is not our router. */
 775     if (sender_sock != (SilcSocketConnection)router->connection) {
 776
 777       /* Get data used in packet header encryption, keys and stuff. */
 778       sock = (SilcSocketConnection)router->connection;
 779       idata = (SilcIDListData)router;
 780
 781       SILC_LOG_DEBUG(("Sending channel message to router for routing"));
 782
 783       silc_server_packet_send_to_channel_real(server, sock, &packetdata,
 784                                               idata->send_key,
 785                                               idata->hmac_send,
 786                                               idata->psn_send++,
 787                                               data, data_len, TRUE,
 788                                               force_send);
 789     }
 790   }
 791
 792   routed = silc_calloc(silc_hash_table_count(channel->user_list),
 793                        sizeof(*routed));
 794
 795   /* Mark that to the route the original sender if from is not routed */
 796   if (sender_type == SILC_ID_CLIENT) {
 797     client = (SilcClientEntry)sender_entry;
 798     if (client->router) {
 799       routed[routed_count++] = client->router;
 800       SILC_LOG_DEBUG(("************* router %s",
 801                       silc_id_render(client->router->id, SILC_ID_SERVER)));
 802     }
 803   }
 804
 805   /* Send the message to clients on the channel's client list. */
 806   silc_hash_table_list(channel->user_list, &htl);
 807   while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
 808     client = chl->client;
 809     if (!client)
 810       continue;
 811
 812     /* Do not send to the sender */
 813     if (!found && client == sender_entry) {
 814       found = TRUE;
 815       continue;
 816     }
 817
 818     /* If the client has set router it means that it is not locally
 819        connected client and we will route the packet further. */
 820     if (server->server_type == SILC_ROUTER && client->router) {
 821
 822       /* Sender maybe server as well so we want to make sure that
 823          we won't send the message to the server it came from. */
 824       if (!found && SILC_ID_SERVER_COMPARE(client->router->id, sender)) {
 825         found = TRUE;
 826         routed[routed_count++] = client->router;
 827         continue;
 828       }
 829
 830       /* Check if we have sent the packet to this route already */
 831       for (k = 0; k < routed_count; k++)
 832         if (routed[k] == client->router)
 833           break;
 834       if (k < routed_count)
 835         continue;
 836
 837       /* Get data used in packet header encryption, keys and stuff. */
 838       sock = (SilcSocketConnection)client->router->connection;
 839       idata = (SilcIDListData)client->router;
 840
 841       /* Do not send to the sender. Check first whether the true
 842          sender's router is same as this client's router. Also check
 843          if the sender socket is the same as this client's router
 844          socket. */
 845       if (sender_entry &&
 846           ((SilcClientEntry)sender_entry)->router == client->router)
 847         continue;
 848       if (sender_sock && sock == sender_sock)
 849         continue;
 850
 851       SILC_LOG_DEBUG(("Relaying packet to client ID(%s) %s (%s)",
 852                       silc_id_render(client->id, SILC_ID_CLIENT),
 853                       sock->hostname, sock->ip));
 854
 855       /* Mark this route routed already. */
 856       routed[routed_count++] = client->router;
 857
 858       /* If the remote connection is router then we'll decrypt the
 859          channel message and re-encrypt it with the session key shared
 860          between us and the remote router. This is done because the
 861          channel keys are cell specific and we have different channel
 862          key than the remote router has. */
 863       if (sock->type == SILC_SOCKET_TYPE_ROUTER) {
 864         if (gone)
 865           continue;
 866
 867         SILC_LOG_DEBUG(("Remote is router, encrypt with session key"));
 868         gone = TRUE;
 869
 870         /* If private key mode is not set then decrypt the packet
 871            and re-encrypt it */
 872         if (!(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
 873           unsigned char *tmp = silc_calloc(data_len, sizeof(*data));
 874           memcpy(tmp, data, data_len);
 875
 876           /* Decrypt the channel message (we don't check the MAC) */
 877           if (channel->channel_key &&
 878               !silc_channel_message_payload_decrypt(tmp, data_len,
 879                                                     channel->channel_key,
 880                                                     NULL)) {
 881             memset(tmp, 0, data_len);
 882             silc_free(tmp);
 883             continue;
 884           }
 885
 886           /* Now re-encrypt and send it to the router */
 887           silc_server_packet_send_srcdest(server, sock,
 888                                           SILC_PACKET_CHANNEL_MESSAGE, 0,
 889                                           sender, sender_type,
 890                                           channel->id, SILC_ID_CHANNEL,
 891                                           tmp, data_len, force_send);
 892
 893           /* Free the copy of the channel message */
 894           memset(tmp, 0, data_len);
 895           silc_free(tmp);
 896         } else {
 897           /* Private key mode is set, we don't have the channel key, so
 898              just re-encrypt the entire packet and send it to the router. */
 899           silc_server_packet_send_srcdest(server, sock,
 900                                           SILC_PACKET_CHANNEL_MESSAGE, 0,
 901                                           sender, sender_type,
 902                                           channel->id, SILC_ID_CHANNEL,
 903                                           data, data_len, force_send);
 904         }
 905         continue;
 906       }
 907
 908       /* Send the packet (to normal server) */
 909       silc_server_packet_send_to_channel_real(server, sock, &packetdata,
 910                                               idata->send_key,
 911                                               idata->hmac_send,
 912                                               idata->psn_send++,
 913                                               data, data_len, TRUE,
 914                                               force_send);
 915
 916       continue;
 917     }
 918
 919     if (client->router)
 920       continue;
 921
 922     /* Get data used in packet header encryption, keys and stuff. */
 923     sock = (SilcSocketConnection)client->connection;
 924     idata = (SilcIDListData)client;
 925
 926     if (sender_sock && sock == sender_sock)
 927       continue;
 928
 929     SILC_LOG_DEBUG(("Sending packet to client ID(%s) %s (%s)",
 930                     silc_id_render(client->id, SILC_ID_CLIENT),
 931                     sock->hostname, sock->ip));
 932
 933     /* Send the packet */
 934     silc_server_packet_send_to_channel_real(server, sock, &packetdata,
 935                                             idata->send_key,
 936                                             idata->hmac_send,
 937                                             idata->psn_send++,
 938                                             data, data_len, TRUE,
 939                                             force_send);
 940   }
 941
 942   silc_free(routed);
 943   silc_free(packetdata.src_id);
 944   silc_free(packetdata.dst_id);
 945 }
 946
 947 /* This function is used to send packets strictly to all local clients
 948    on a particular channel.  This is used for example to distribute new
 949    channel key to all our locally connected clients on the channel.
 950    The packets are always encrypted with the session key shared between
 951    the client, this means these are not _to the channel_ but _to the client_
 952    on the channel. */
 953
 954 void silc_server_packet_send_local_channel(SilcServer server,
 955                                            SilcChannelEntry channel,
 956                                            SilcPacketType type,
 957                                            SilcPacketFlags flags,
 958                                            unsigned char *data,
 959                                            uint32 data_len,
 960                                            bool force_send)
 961 {
 962   SilcChannelClientEntry chl;
 963   SilcHashTableList htl;
 964   SilcSocketConnection sock = NULL;
 965
 966   SILC_LOG_DEBUG(("Start"));
 967
 968   /* Send the message to clients on the channel's client list. */
 969   silc_hash_table_list(channel->user_list, &htl);
 970   while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
 971     if (chl->client && !chl->client->router) {
 972       sock = (SilcSocketConnection)chl->client->connection;
 973
 974       /* Send the packet to the client */
 975       silc_server_packet_send_dest(server, sock, type, flags, chl->client->id,
 976                                    SILC_ID_CLIENT, data, data_len,
 977                                    force_send);
 978     }
 979   }
 980 }
 981
 982 /* Routine used to send (relay, route) private messages to some destination.
 983    If the private message key does not exist then the message is re-encrypted,
 984    otherwise we just pass it along. This really is not used to send new
 985    private messages (as server does not send them) but to relay received
 986    private messages. */
 987
 988 void silc_server_send_private_message(SilcServer server,
 989                                       SilcSocketConnection dst_sock,
 990                                       SilcCipher cipher,
 991                                       SilcHmac hmac,
 992                                       uint32 sequence,
 993                                       SilcPacketContext *packet)
 994 {
 995   SilcBuffer buffer = packet->buffer;
 996
 997   /* Re-encrypt and send if private messge key does not exist */
 998   if (!(packet->flags & SILC_PACKET_FLAG_PRIVMSG_KEY)) {
 999
1000     silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1001                      + packet->dst_id_len + packet->padlen);
1002     silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
1003     silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
1004
1005     /* Re-encrypt packet */
1006     silc_packet_encrypt(cipher, hmac, sequence, dst_sock->outbuf, buffer->len);
1007
1008     /* Send the packet */
1009     silc_server_packet_send_real(server, dst_sock, FALSE);
1010
1011   } else {
1012     /* Key exist so encrypt just header and send it */
1013     silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1014                      + packet->dst_id_len + packet->padlen);
1015     silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
1016     silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
1017
1018     /* Encrypt header */
1019     silc_packet_encrypt(cipher, hmac, sequence, dst_sock->outbuf,
1020                         SILC_PACKET_HEADER_LEN + packet->src_id_len +
1021                         packet->dst_id_len + packet->padlen);
1022
1023     silc_server_packet_send_real(server, dst_sock, FALSE);
1024   }
1025 }
1026
1027 /* Sends current motd to client */
1028
1029 void silc_server_send_motd(SilcServer server,
1030                            SilcSocketConnection sock)
1031 {
1032   char *motd;
1033   uint32 motd_len;
1034
1035   if (server->config && server->config->motd &&
1036       server->config->motd->motd_file) {
1037
1038     motd = silc_file_readfile(server->config->motd->motd_file, &motd_len);
1039     if (!motd)
1040       return;
1041
1042     silc_server_send_notify(server, sock, FALSE, SILC_NOTIFY_TYPE_MOTD, 1,
1043                             motd, motd_len);
1044     silc_free(motd);
1045   }
1046 }
1047
1048 /* Sends error message. Error messages may or may not have any
1049    implications. */
1050
1051 void silc_server_send_error(SilcServer server,
1052                             SilcSocketConnection sock,
1053                             const char *fmt, ...)
1054 {
1055   va_list ap;
1056   unsigned char buf[4096];
1057
1058   memset(buf, 0, sizeof(buf));
1059   va_start(ap, fmt);
1060   vsprintf(buf, fmt, ap);
1061   va_end(ap);
1062
1063   silc_server_packet_send(server, sock, SILC_PACKET_ERROR, 0,
1064                           buf, strlen(buf), FALSE);
1065 }
1066
1067 /* Sends notify message. If format is TRUE the variable arguments are
1068    formatted and the formatted string is sent as argument payload. If it is
1069    FALSE then each argument is sent as separate argument and their format
1070    in the argument list must be { argument data, argument length }. */
1071
1072 void silc_server_send_notify(SilcServer server,
1073                              SilcSocketConnection sock,
1074                              bool broadcast,
1075                              SilcNotifyType type,
1076                              uint32 argc, ...)
1077 {
1078   va_list ap;
1079   SilcBuffer packet;
1080
1081   va_start(ap, argc);
1082
1083   packet = silc_notify_payload_encode(type, argc, ap);
1084   silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
1085                           broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1086                           packet->data, packet->len, FALSE);
1087
1088   /* Send to backup routers if this is being broadcasted to primary
1089      router. */
1090   if (server->router && server->router->connection &&
1091       sock == server->router->connection && broadcast)
1092     silc_server_backup_send(server, NULL, SILC_PACKET_NOTIFY, 0,
1093                             packet->data, packet->len, FALSE, TRUE);
1094
1095   silc_buffer_free(packet);
1096   va_end(ap);
1097 }
1098
1099 /* Sends notify message and gets the arguments from the `args' Argument
1100    Payloads. */
1101
1102 void silc_server_send_notify_args(SilcServer server,
1103                                   SilcSocketConnection sock,
1104                                   bool broadcast,
1105                                   SilcNotifyType type,
1106                                   uint32 argc,
1107                                   SilcBuffer args)
1108 {
1109   SilcBuffer packet;
1110
1111   packet = silc_notify_payload_encode_args(type, argc, args);
1112   silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY,
1113                           broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1114                           packet->data, packet->len, FALSE);
1115   silc_buffer_free(packet);
1116 }
1117
1118 /* Send CHANNEL_CHANGE notify type. This tells the receiver to replace the
1119    `old_id' with the `new_id'. */
1120
1121 void silc_server_send_notify_channel_change(SilcServer server,
1122                                             SilcSocketConnection sock,
1123                                             bool broadcast,
1124                                             SilcChannelID *old_id,
1125                                             SilcChannelID *new_id)
1126 {
1127   SilcBuffer idp1, idp2;
1128
1129   idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CHANNEL);
1130   idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CHANNEL);
1131
1132   silc_server_send_notify(server, sock, broadcast,
1133                           SILC_NOTIFY_TYPE_CHANNEL_CHANGE,
1134                           2, idp1->data, idp1->len, idp2->data, idp2->len);
1135   silc_buffer_free(idp1);
1136   silc_buffer_free(idp2);
1137 }
1138
1139 /* Send NICK_CHANGE notify type. This tells the receiver to replace the
1140    `old_id' with the `new_id'. */
1141
1142 void silc_server_send_notify_nick_change(SilcServer server,
1143                                          SilcSocketConnection sock,
1144                                          bool broadcast,
1145                                          SilcClientID *old_id,
1146                                          SilcClientID *new_id)
1147 {
1148   SilcBuffer idp1, idp2;
1149
1150   idp1 = silc_id_payload_encode((void *)old_id, SILC_ID_CLIENT);
1151   idp2 = silc_id_payload_encode((void *)new_id, SILC_ID_CLIENT);
1152
1153   silc_server_send_notify(server, sock, broadcast,
1154                           SILC_NOTIFY_TYPE_NICK_CHANGE,
1155                           2, idp1->data, idp1->len, idp2->data, idp2->len);
1156   silc_buffer_free(idp1);
1157   silc_buffer_free(idp2);
1158 }
1159
1160 /* Sends JOIN notify type. This tells that new client by `client_id' ID
1161    has joined to the `channel'. */
1162
1163 void silc_server_send_notify_join(SilcServer server,
1164                                   SilcSocketConnection sock,
1165                                   bool broadcast,
1166                                   SilcChannelEntry channel,
1167                                   SilcClientID *client_id)
1168 {
1169   SilcBuffer idp1, idp2;
1170
1171   idp1 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1172   idp2 = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1173   silc_server_send_notify(server, sock, broadcast, SILC_NOTIFY_TYPE_JOIN,
1174                           2, idp1->data, idp1->len,
1175                           idp2->data, idp2->len);
1176   silc_buffer_free(idp1);
1177   silc_buffer_free(idp2);
1178 }
1179
1180 /* Sends LEAVE notify type. This tells that `client_id' has left the
1181    `channel'. The Notify packet is always destined to the channel. */
1182
1183 void silc_server_send_notify_leave(SilcServer server,
1184                                    SilcSocketConnection sock,
1185                                    bool broadcast,
1186                                    SilcChannelEntry channel,
1187                                    SilcClientID *client_id)
1188 {
1189   SilcBuffer idp;
1190
1191   idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1192   silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1193                                SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_LEAVE,
1194                                1, idp->data, idp->len);
1195   silc_buffer_free(idp);
1196 }
1197
1198 /* Sends CMODE_CHANGE notify type. This tells that `client_id' changed the
1199    `channel' mode to `mode. The Notify packet is always destined to
1200    the channel. */
1201
1202 void silc_server_send_notify_cmode(SilcServer server,
1203                                    SilcSocketConnection sock,
1204                                    bool broadcast,
1205                                    SilcChannelEntry channel,
1206                                    uint32 mode_mask,
1207                                    void *id, SilcIdType id_type,
1208                                    char *cipher, char *hmac,
1209                                    char *passphrase)
1210 {
1211   SilcBuffer idp;
1212   unsigned char mode[4];
1213
1214   idp = silc_id_payload_encode((void *)id, id_type);
1215   SILC_PUT32_MSB(mode_mask, mode);
1216
1217   silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1218                                SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_CMODE_CHANGE,
1219                                5, idp->data, idp->len,
1220                                mode, 4,
1221                                cipher, cipher ? strlen(cipher) : 0,
1222                                hmac, hmac ? strlen(hmac) : 0,
1223                                passphrase, passphrase ?
1224                                strlen(passphrase) : 0);
1225   silc_buffer_free(idp);
1226 }
1227
1228 /* Sends CUMODE_CHANGE notify type. This tells that `client_id' changed the
1229    `target' client's mode on `channel'. The notify packet is always
1230    destined to the channel. */
1231
1232 void silc_server_send_notify_cumode(SilcServer server,
1233                                     SilcSocketConnection sock,
1234                                     bool broadcast,
1235                                     SilcChannelEntry channel,
1236                                     uint32 mode_mask,
1237                                     void *id, SilcIdType id_type,
1238                                     SilcClientID *target)
1239 {
1240   SilcBuffer idp1, idp2;
1241   unsigned char mode[4];
1242
1243   idp1 = silc_id_payload_encode((void *)id, id_type);
1244   idp2 = silc_id_payload_encode((void *)target, SILC_ID_CLIENT);
1245   SILC_PUT32_MSB(mode_mask, mode);
1246
1247   silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1248                                SILC_ID_CHANNEL,
1249                                SILC_NOTIFY_TYPE_CUMODE_CHANGE, 3,
1250                                idp1->data, idp1->len,
1251                                mode, 4,
1252                                idp2->data, idp2->len);
1253   silc_buffer_free(idp1);
1254   silc_buffer_free(idp2);
1255 }
1256
1257 /* Sends SIGNOFF notify type. This tells that `client_id' client has
1258    left SILC network. This function is used only between server and router
1259    traffic. This is not used to send the notify to the channel for
1260    client. The `message may be NULL. */
1261
1262 void silc_server_send_notify_signoff(SilcServer server,
1263                                      SilcSocketConnection sock,
1264                                      bool broadcast,
1265                                      SilcClientID *client_id,
1266                                      const char *message)
1267 {
1268   SilcBuffer idp;
1269
1270   idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1271   silc_server_send_notify(server, sock, broadcast,
1272                           SILC_NOTIFY_TYPE_SIGNOFF,
1273                           message ? 2 : 1, idp->data, idp->len,
1274                           message, message ? strlen(message): 0);
1275   silc_buffer_free(idp);
1276 }
1277
1278 /* Sends TOPIC_SET notify type. This tells that `id' changed
1279    the `channel's topic to `topic'. The Notify packet is always destined
1280    to the channel. This function is used to send the topic set notifies
1281    between routers. */
1282
1283 void silc_server_send_notify_topic_set(SilcServer server,
1284                                        SilcSocketConnection sock,
1285                                        bool broadcast,
1286                                        SilcChannelEntry channel,
1287                                        void *id, SilcIdType id_type,
1288                                        char *topic)
1289 {
1290   SilcBuffer idp;
1291
1292   idp = silc_id_payload_encode(id, id_type);
1293   silc_server_send_notify_dest(server, sock, broadcast,
1294                                (void *)channel->id, SILC_ID_CHANNEL,
1295                                SILC_NOTIFY_TYPE_TOPIC_SET,
1296                                topic ? 2 : 1,
1297                                idp->data, idp->len,
1298                                topic, topic ? strlen(topic) : 0);
1299   silc_buffer_free(idp);
1300 }
1301
1302 /* Send KICKED notify type. This tells that the `client_id' on `channel'
1303    was kicked off the channel.  The `comment' may indicate the reason
1304    for the kicking. This function is used only between server and router
1305    traffic. */
1306
1307 void silc_server_send_notify_kicked(SilcServer server,
1308                                     SilcSocketConnection sock,
1309                                     bool broadcast,
1310                                     SilcChannelEntry channel,
1311                                     SilcClientID *client_id,
1312                                     char *comment)
1313 {
1314   SilcBuffer idp;
1315
1316   idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1317   silc_server_send_notify_dest(server, sock, broadcast, (void *)channel->id,
1318                                SILC_ID_CHANNEL, SILC_NOTIFY_TYPE_KICKED,
1319                                comment ? 2 : 1, idp->data, idp->len,
1320                                comment, comment ? strlen(comment) : 0);
1321   silc_buffer_free(idp);
1322 }
1323
1324 /* Send KILLED notify type. This tells that the `client_id' client was
1325    killed from the network.  The `comment' may indicate the reason
1326    for the killing. */
1327
1328 void silc_server_send_notify_killed(SilcServer server,
1329                                     SilcSocketConnection sock,
1330                                     bool broadcast,
1331                                     SilcClientID *client_id,
1332                                     char *comment)
1333 {
1334   SilcBuffer idp;
1335
1336   idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1337   silc_server_send_notify_dest(server, sock, broadcast, (void *)client_id,
1338                                SILC_ID_CLIENT, SILC_NOTIFY_TYPE_KILLED,
1339                                comment ? 2 : 1, idp->data, idp->len,
1340                                comment, comment ? strlen(comment) : 0);
1341   silc_buffer_free(idp);
1342 }
1343
1344 /* Sends UMODE_CHANGE notify type. This tells that `client_id' client's
1345    user mode in the SILC Network was changed. This function is used to
1346    send the packet between routers as broadcast packet. */
1347
1348 void silc_server_send_notify_umode(SilcServer server,
1349                                    SilcSocketConnection sock,
1350                                    bool broadcast,
1351                                    SilcClientID *client_id,
1352                                    uint32 mode_mask)
1353 {
1354   SilcBuffer idp;
1355   unsigned char mode[4];
1356
1357   idp = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1358   SILC_PUT32_MSB(mode_mask, mode);
1359
1360   silc_server_send_notify(server, sock, broadcast,
1361                           SILC_NOTIFY_TYPE_UMODE_CHANGE, 2,
1362                           idp->data, idp->len,
1363                           mode, 4);
1364   silc_buffer_free(idp);
1365 }
1366
1367 /* Sends BAN notify type. This tells that ban has been either `add'ed
1368    or `del'eted on the `channel. This function is used to send the packet
1369    between routers as broadcast packet. */
1370
1371 void silc_server_send_notify_ban(SilcServer server,
1372                                  SilcSocketConnection sock,
1373                                  bool broadcast,
1374                                  SilcChannelEntry channel,
1375                                  char *add, char *del)
1376 {
1377   SilcBuffer idp;
1378
1379   idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1380   silc_server_send_notify(server, sock, broadcast,
1381                           SILC_NOTIFY_TYPE_BAN, 3,
1382                           idp->data, idp->len,
1383                           add, add ? strlen(add) : 0,
1384                           del, del ? strlen(del) : 0);
1385   silc_buffer_free(idp);
1386 }
1387
1388 /* Sends INVITE notify type. This tells that invite has been either `add'ed
1389    or `del'eted on the `channel.  The sender of the invite is the `client_id'.
1390    This function is used to send the packet between routers as broadcast
1391    packet. */
1392
1393 void silc_server_send_notify_invite(SilcServer server,
1394                                     SilcSocketConnection sock,
1395                                     bool broadcast,
1396                                     SilcChannelEntry channel,
1397                                     SilcClientID *client_id,
1398                                     char *add, char *del)
1399 {
1400   SilcBuffer idp, idp2;
1401
1402   idp = silc_id_payload_encode((void *)channel->id, SILC_ID_CHANNEL);
1403   idp2 = silc_id_payload_encode((void *)client_id, SILC_ID_CLIENT);
1404   silc_server_send_notify(server, sock, broadcast,
1405                           SILC_NOTIFY_TYPE_INVITE, 5,
1406                           idp->data, idp->len,
1407                           channel->channel_name, strlen(channel->channel_name),
1408                           idp2->data, idp2->len,
1409                           add, add ? strlen(add) : 0,
1410                           del, del ? strlen(del) : 0);
1411   silc_buffer_free(idp);
1412   silc_buffer_free(idp2);
1413 }
1414
1415 /* Sends notify message destined to specific entity. */
1416
1417 void silc_server_send_notify_dest(SilcServer server,
1418                                   SilcSocketConnection sock,
1419                                   bool broadcast,
1420                                   void *dest_id,
1421                                   SilcIdType dest_id_type,
1422                                   SilcNotifyType type,
1423                                   uint32 argc, ...)
1424 {
1425   va_list ap;
1426   SilcBuffer packet;
1427
1428   va_start(ap, argc);
1429
1430   packet = silc_notify_payload_encode(type, argc, ap);
1431   silc_server_packet_send_dest(server, sock, SILC_PACKET_NOTIFY,
1432                                broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1433                                dest_id, dest_id_type,
1434                                packet->data, packet->len, FALSE);
1435   silc_buffer_free(packet);
1436   va_end(ap);
1437 }
1438
1439 /* Sends notify message to a channel. The notify message sent is
1440    distributed to all clients on the channel. If `route_notify' is TRUE
1441    then the notify may be routed to primary route or to some other routers.
1442    If FALSE it is assured that the notify is sent only locally. If `sender'
1443    is provided then the packet is not sent to that connection since it
1444    originally came from it. */
1445
1446 void silc_server_send_notify_to_channel(SilcServer server,
1447                                         SilcSocketConnection sender,
1448                                         SilcChannelEntry channel,
1449                                         bool route_notify,
1450                                         SilcNotifyType type,
1451                                         uint32 argc, ...)
1452 {
1453   va_list ap;
1454   SilcBuffer packet;
1455
1456   va_start(ap, argc);
1457
1458   packet = silc_notify_payload_encode(type, argc, ap);
1459   silc_server_packet_send_to_channel(server, sender, channel,
1460                                      SILC_PACKET_NOTIFY, route_notify,
1461                                      packet->data, packet->len, FALSE);
1462   silc_buffer_free(packet);
1463   va_end(ap);
1464 }
1465
1466 /* Send notify message to all channels the client has joined. It is quaranteed
1467    that the message is sent only once to a client (ie. if a client is joined
1468    on two same channel it will receive only one notify message). Also, this
1469    sends only to local clients (locally connected if we are server, and to
1470    local servers if we are router). If `sender' is provided the packet is
1471    not sent to that client at all. */
1472
1473 void silc_server_send_notify_on_channels(SilcServer server,
1474                                          SilcClientEntry sender,
1475                                          SilcClientEntry client,
1476                                          SilcNotifyType type,
1477                                          uint32 argc, ...)
1478 {
1479   int k;
1480   SilcSocketConnection sock = NULL;
1481   SilcPacketContext packetdata;
1482   SilcClientEntry c;
1483   SilcClientEntry *sent_clients = NULL;
1484   uint32 sent_clients_count = 0;
1485   SilcServerEntry *routed = NULL;
1486   uint32 routed_count = 0;
1487   SilcHashTableList htl, htl2;
1488   SilcChannelEntry channel;
1489   SilcChannelClientEntry chl, chl2;
1490   SilcIDListData idata;
1491   SilcBuffer packet;
1492   unsigned char *data;
1493   uint32 data_len;
1494   bool force_send = FALSE;
1495   va_list ap;
1496
1497   SILC_LOG_DEBUG(("Start"));
1498
1499   if (!silc_hash_table_count(client->channels))
1500     return;
1501
1502   va_start(ap, argc);
1503   packet = silc_notify_payload_encode(type, argc, ap);
1504   data = packet->data;
1505   data_len = packet->len;
1506
1507   /* Set the packet context pointers. */
1508   packetdata.flags = 0;
1509   packetdata.type = SILC_PACKET_NOTIFY;
1510   packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
1511   packetdata.src_id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
1512   packetdata.src_id_type = SILC_ID_SERVER;
1513
1514   silc_hash_table_list(client->channels, &htl);
1515   while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
1516     channel = chl->channel;
1517
1518     /* Send the message to all clients on the channel's client list. */
1519     silc_hash_table_list(channel->user_list, &htl2);
1520     while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
1521       c = chl2->client;
1522
1523       if (sender && c == sender)
1524         continue;
1525
1526       /* Check if we have sent the packet to this client already */
1527       for (k = 0; k < sent_clients_count; k++)
1528         if (sent_clients[k] == c)
1529           break;
1530       if (k < sent_clients_count)
1531         continue;
1532
1533       /* If we are router and if this client has router set it is not
1534          locally connected client and we will route the message to the
1535          router set in the client. */
1536       if (c && c->router && server->server_type == SILC_ROUTER) {
1537         /* Check if we have sent the packet to this route already */
1538         for (k = 0; k < routed_count; k++)
1539           if (routed[k] == c->router)
1540             break;
1541         if (k < routed_count)
1542           continue;
1543
1544         /* Get data used in packet header encryption, keys and stuff. */
1545         sock = (SilcSocketConnection)c->router->connection;
1546         idata = (SilcIDListData)c->router;
1547
1548         {
1549           SILC_LOG_DEBUG(("*****************"));
1550           SILC_LOG_DEBUG(("client->router->id %s",
1551                           silc_id_render(c->router->id, SILC_ID_SERVER)));
1552           SILC_LOG_DEBUG(("client->router->connection->user_data->id %s",
1553                           silc_id_render(((SilcServerEntry)sock->user_data)->id, SILC_ID_SERVER)));
1554         }
1555
1556         packetdata.dst_id = silc_id_id2str(c->router->id, SILC_ID_SERVER);
1557         packetdata.dst_id_len = silc_id_get_len(c->router->id, SILC_ID_SERVER);
1558         packetdata.dst_id_type = SILC_ID_SERVER;
1559
1560         /* Send the packet */
1561         silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1562                                                 idata->send_key,
1563                                                 idata->hmac_send,
1564                                                 idata->psn_send++,
1565                                                 data, data_len, FALSE,
1566                                                 force_send);
1567
1568         silc_free(packetdata.dst_id);
1569
1570         /* We want to make sure that the packet is routed to same router
1571            only once. Mark this route as sent route. */
1572         routed = silc_realloc(routed, sizeof(*routed) * (routed_count + 1));
1573         routed[routed_count++] = c->router;
1574         continue;
1575       }
1576
1577       if (c && c->router)
1578         continue;
1579
1580       /* Send to locally connected client */
1581       if (c) {
1582
1583         /* Get data used in packet header encryption, keys and stuff. */
1584         sock = (SilcSocketConnection)c->connection;
1585         idata = (SilcIDListData)c;
1586
1587         packetdata.dst_id = silc_id_id2str(c->id, SILC_ID_CLIENT);
1588         packetdata.dst_id_len = silc_id_get_len(c->id, SILC_ID_CLIENT);
1589         packetdata.dst_id_type = SILC_ID_CLIENT;
1590
1591         /* Send the packet */
1592         silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1593                                                 idata->send_key,
1594                                                 idata->hmac_send,
1595                                                 idata->psn_send++,
1596                                                 data, data_len, FALSE,
1597                                                 force_send);
1598
1599         silc_free(packetdata.dst_id);
1600
1601         /* Make sure that we send the notify only once per client. */
1602         sent_clients = silc_realloc(sent_clients, sizeof(*sent_clients) *
1603                                     (sent_clients_count + 1));
1604         sent_clients[sent_clients_count++] = c;
1605       }
1606     }
1607   }
1608
1609   silc_free(routed);
1610   silc_free(sent_clients);
1611   silc_free(packetdata.src_id);
1612   silc_buffer_free(packet);
1613   va_end(ap);
1614 }
1615
1616 /* Sends New ID Payload to remote end. The packet is used to distribute
1617    information about new registered clients, servers, channel etc. usually
1618    to routers so that they can keep these information up to date.
1619    If the argument `broadcast' is TRUE then the packet is sent as
1620    broadcast packet. */
1621
1622 void silc_server_send_new_id(SilcServer server,
1623                              SilcSocketConnection sock,
1624                              bool broadcast,
1625                              void *id, SilcIdType id_type,
1626                              uint32 id_len)
1627 {
1628   SilcBuffer idp;
1629
1630   SILC_LOG_DEBUG(("Start"));
1631
1632   idp = silc_id_payload_encode(id, id_type);
1633   silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID,
1634                           broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1635                           idp->data, idp->len, FALSE);
1636
1637   /* Send to backup routers if this is being broadcasted to primary
1638      router. */
1639   if (server->router && server->router->connection &&
1640       sock == server->router->connection && broadcast)
1641     silc_server_backup_send(server, NULL, SILC_PACKET_NEW_ID, 0,
1642                             idp->data, idp->len, FALSE, TRUE);
1643
1644   silc_buffer_free(idp);
1645 }
1646
1647 /* Send New Channel Payload to notify about newly created channel in the
1648    SILC network. Normal server nevers sends this packet. Router uses this
1649    to notify other routers in the network about new channel. This packet
1650    is broadcasted. */
1651
1652 void silc_server_send_new_channel(SilcServer server,
1653                                   SilcSocketConnection sock,
1654                                   bool broadcast,
1655                                   char *channel_name,
1656                                   void *channel_id,
1657                                   uint32 channel_id_len,
1658                                   uint32 mode)
1659 {
1660   SilcBuffer packet;
1661   unsigned char *cid;
1662   uint32 name_len = strlen(channel_name);
1663
1664   SILC_LOG_DEBUG(("Start"));
1665
1666   cid = silc_id_id2str(channel_id, SILC_ID_CHANNEL);
1667   if (!cid)
1668     return;
1669
1670   /* Encode the channel payload */
1671   packet = silc_channel_payload_encode(channel_name, name_len,
1672                                        cid, channel_id_len, mode);
1673
1674   silc_server_packet_send(server, sock, SILC_PACKET_NEW_CHANNEL,
1675                           broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
1676                           packet->data, packet->len, FALSE);
1677
1678   /* Send to backup routers if this is being broadcasted to primary
1679      router. */
1680   if (server->router && server->router->connection &&
1681       sock == server->router->connection && broadcast)
1682     silc_server_backup_send(server, NULL, SILC_PACKET_NEW_CHANNEL, 0,
1683                             packet->data, packet->len, FALSE, TRUE);
1684
1685   silc_free(cid);
1686   silc_buffer_free(packet);
1687 }
1688
1689 /* Send Channel Key payload to distribute the new channel key. Normal server
1690    sends this to router when new client joins to existing channel. Router
1691    sends this to the local server who sent the join command in case where
1692    the channel did not exist yet. Both normal and router servers uses this
1693    also to send this to locally connected clients on the channel. This
1694    must not be broadcasted packet. Routers do not send this to each other.
1695    If `sender is provided then the packet is not sent to that connection since
1696    it originally came from it. */
1697
1698 void silc_server_send_channel_key(SilcServer server,
1699                                   SilcSocketConnection sender,
1700                                   SilcChannelEntry channel,
1701                                   unsigned char route)
1702 {
1703   SilcBuffer packet;
1704   unsigned char *chid;
1705   uint32 tmp_len;
1706
1707   SILC_LOG_DEBUG(("Sending key to channel %s", channel->channel_name));
1708
1709   chid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1710   if (!chid)
1711     return;
1712
1713   /* Encode channel key packet */
1714   tmp_len = strlen(channel->channel_key->cipher->name);
1715   packet = silc_channel_key_payload_encode(silc_id_get_len(channel->id,
1716                                                            SILC_ID_CHANNEL),
1717                                            chid, tmp_len,
1718                                            channel->channel_key->cipher->name,
1719                                            channel->key_len / 8, channel->key);
1720   silc_server_packet_send_to_channel(server, sender, channel,
1721                                      SILC_PACKET_CHANNEL_KEY,
1722                                      route, packet->data, packet->len,
1723                                      FALSE);
1724   silc_buffer_free(packet);
1725   silc_free(chid);
1726 }
1727
1728 /* Generic function to send any command. The arguments must be sent already
1729    encoded into correct form in correct order. */
1730
1731 void silc_server_send_command(SilcServer server,
1732                               SilcSocketConnection sock,
1733                               SilcCommand command,
1734                               uint16 ident,
1735                               uint32 argc, ...)
1736 {
1737   SilcBuffer packet;
1738   va_list ap;
1739
1740   va_start(ap, argc);
1741
1742   packet = silc_command_payload_encode_vap(command, ident, argc, ap);
1743   silc_server_packet_send(server, sock, SILC_PACKET_COMMAND, 0,
1744                           packet->data, packet->len, TRUE);
1745   silc_buffer_free(packet);
1746   va_end(ap);
1747 }
1748
1749 /* Generic function to send any command reply. The arguments must be sent
1750    already encoded into correct form in correct order. */
1751
1752 void silc_server_send_command_reply(SilcServer server,
1753                                     SilcSocketConnection sock,
1754                                     SilcCommand command,
1755                                     SilcCommandStatus status,
1756                                     uint16 ident,
1757                                     uint32 argc, ...)
1758 {
1759   SilcBuffer packet;
1760   va_list ap;
1761
1762   va_start(ap, argc);
1763
1764   packet = silc_command_reply_payload_encode_vap(command, status, ident,
1765                                                  argc, ap);
1766   silc_server_packet_send(server, sock, SILC_PACKET_COMMAND_REPLY, 0,
1767                           packet->data, packet->len, TRUE);
1768   silc_buffer_free(packet);
1769   va_end(ap);
1770 }
1771
1772 /* Generic function to send any command reply. The arguments must be sent
1773    already encoded into correct form in correct order. */
1774
1775 void silc_server_send_dest_command_reply(SilcServer server,
1776                                          SilcSocketConnection sock,
1777                                          void *dst_id,
1778                                          SilcIdType dst_id_type,
1779                                          SilcCommand command,
1780                                          SilcCommandStatus status,
1781                                          uint16 ident,
1782                                          uint32 argc, ...)
1783 {
1784   SilcBuffer packet;
1785   va_list ap;
1786
1787   va_start(ap, argc);
1788
1789   packet = silc_command_reply_payload_encode_vap(command, status, ident,
1790                                                  argc, ap);
1791   silc_server_packet_send_dest(server, sock, SILC_PACKET_COMMAND_REPLY, 0,
1792                                dst_id, dst_id_type, packet->data,
1793                                packet->len, TRUE);
1794   silc_buffer_free(packet);
1795   va_end(ap);
1796 }
1797
1798 /* Send the heartbeat packet. */
1799
1800 void silc_server_send_heartbeat(SilcServer server,
1801                                 SilcSocketConnection sock)
1802 {
1803   silc_server_packet_send(server, sock, SILC_PACKET_HEARTBEAT, 0,
1804                           NULL, 0, FALSE);
1805 }
1806
1807 /* Generic function to relay packet we've received. This is used to relay
1808    packets to a client but generally can be used to other purposes as well. */
1809
1810 void silc_server_relay_packet(SilcServer server,
1811                               SilcSocketConnection dst_sock,
1812                               SilcCipher cipher,
1813                               SilcHmac hmac,
1814                               uint32 sequence,
1815                               SilcPacketContext *packet,
1816                               bool force_send)
1817 {
1818   silc_buffer_push(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1819                    + packet->dst_id_len + packet->padlen);
1820
1821   silc_packet_send_prepare(dst_sock, 0, 0, packet->buffer->len);
1822   silc_buffer_put(dst_sock->outbuf, packet->buffer->data, packet->buffer->len);
1823
1824   /* Re-encrypt packet */
1825   silc_packet_encrypt(cipher, hmac, sequence, dst_sock->outbuf,
1826                       packet->buffer->len);
1827
1828   /* Send the packet */
1829   silc_server_packet_send_real(server, dst_sock, force_send);
1830
1831   silc_buffer_pull(packet->buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
1832                    + packet->dst_id_len + packet->padlen);
1833 }
1834
1835 /* Routine used to send the connection authentication packet. */
1836
1837 void silc_server_send_connection_auth_request(SilcServer server,
1838                                               SilcSocketConnection sock,
1839                                               uint16 conn_type,
1840                                               SilcAuthMethod auth_meth)
1841 {
1842   SilcBuffer packet;
1843
1844   packet = silc_buffer_alloc(4);
1845   silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
1846   silc_buffer_format(packet,
1847                      SILC_STR_UI_SHORT(conn_type),
1848                      SILC_STR_UI_SHORT(auth_meth),
1849                      SILC_STR_END);
1850
1851   silc_server_packet_send(server, sock, SILC_PACKET_CONNECTION_AUTH_REQUEST,
1852                           0, packet->data, packet->len, FALSE);
1853   silc_buffer_free(packet);
1854 }
1855
1856 /* Purge the outgoing packet queue to the network if there is data. This
1857    function can be used to empty the packet queue. It is guaranteed that
1858    after this function returns the outgoing data queue is empty. */
1859
1860 void silc_server_packet_queue_purge(SilcServer server,
1861                                     SilcSocketConnection sock)
1862 {
1863   if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
1864       (SILC_IS_DISCONNECTED(sock) == FALSE)) {
1865     server->stat.packets_sent++;
1866
1867     if (sock->outbuf->data - sock->outbuf->head)
1868       silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1869
1870     silc_packet_send(sock, TRUE);
1871
1872     SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
1873     SILC_UNSET_OUTBUF_PENDING(sock);
1874     silc_buffer_clear(sock->outbuf);
1875   }
1876 }