5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 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; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
21 #include "serverincludes.h"
22 #include "server_internal.h"
24 SILC_TASK_CALLBACK(silc_server_protocol_backup_done);
28 SilcServerEntry server;
32 } SilcServerBackupEntry;
34 /* Holds IP address and port of the primary router that was replaced
39 SilcServerEntry server; /* Backup router that replaced the primary */
40 } SilcServerBackupReplaced;
43 struct SilcServerBackupStruct {
44 SilcServerBackupEntry *servers;
46 SilcServerBackupReplaced **replaced;
47 uint32 replaced_count;
53 SilcServerEntry server_entry;
54 } SilcServerBackupProtocolSession;
56 /* Backup resuming protocol context */
59 SilcSocketConnection sock;
63 SilcServerBackupProtocolSession *sessions;
64 uint32 sessions_count;
66 } *SilcServerBackupProtocolContext;
68 /* Adds the `backup_server' to be one of our backup router. This can be
69 called multiple times to set multiple backup routers. The `ip' and `port'
70 is the IP and port that the `backup_router' will replace if the `ip'
71 will become unresponsive. If `local' is TRUE then the `backup_server' is
72 in the local cell, if FALSE it is in some other cell. */
74 void silc_server_backup_add(SilcServer server, SilcServerEntry backup_server,
75 const char *ip, int port, bool local)
79 SILC_LOG_DEBUG(("Start"));
85 server->backup = silc_calloc(1, sizeof(*server->backup));
87 for (i = 0; i < server->backup->servers_count; i++) {
88 if (!server->backup->servers[i].server) {
89 server->backup->servers[i].server = backup_server;
90 server->backup->servers[i].local = local;
91 memset(server->backup->servers[i].ip.data, 0,
92 sizeof(server->backup->servers[i].ip.data));
93 silc_net_addr2bin_ne(ip, server->backup->servers[i].ip.data,
94 sizeof(server->backup->servers[i].ip.data));
95 //server->backup->servers[i].port = port;
100 i = server->backup->servers_count;
101 server->backup->servers = silc_realloc(server->backup->servers,
102 sizeof(*server->backup->servers) *
104 server->backup->servers[i].server = backup_server;
105 server->backup->servers[i].local = local;
106 memset(server->backup->servers[i].ip.data, 0,
107 sizeof(server->backup->servers[i].ip.data));
108 silc_net_addr2bin_ne(ip, server->backup->servers[i].ip.data,
109 sizeof(server->backup->servers[i].ip.data));
110 //server->backup->servers[i].port = server_id->port;
111 server->backup->servers_count++;
114 /* Returns backup router for IP and port in `replacing' or NULL if there
115 does not exist backup router. */
117 SilcServerEntry silc_server_backup_get(SilcServer server,
118 SilcServerID *server_id)
122 SILC_LOG_DEBUG(("Start"));
127 for (i = 0; i < server->backup->servers_count; i++) {
128 SILC_LOG_HEXDUMP(("IP"), server_id->ip.data, 16);
129 SILC_LOG_HEXDUMP(("IP"), server->backup->servers[i].ip.data, 16);
130 if (server->backup->servers[i].server &&
131 !memcmp(&server->backup->servers[i].ip, &server_id->ip.data,
132 sizeof(server_id->ip.data)))
133 return server->backup->servers[i].server;
139 /* Deletes the backup server `server_entry'. */
140 void silc_server_backup_del(SilcServer server, SilcServerEntry server_entry)
144 SILC_LOG_DEBUG(("Start"));
149 for (i = 0; i < server->backup->servers_count; i++) {
150 if (server->backup->servers[i].server == server_entry) {
151 server->backup->servers[i].server = NULL;
157 /* Marks the IP address and port from the `server_id' as being replaced
158 by backup router indicated by the `server'. If the router connects at
159 a later time we can check whether it has been replaced by an backup
162 void silc_server_backup_replaced_add(SilcServer server,
163 SilcServerID *server_id,
164 SilcServerEntry server_entry)
167 SilcServerBackupReplaced *r = silc_calloc(1, sizeof(*r));;
169 SILC_LOG_DEBUG(("Start"));
172 server->backup = silc_calloc(1, sizeof(*server->backup));
173 if (!server->backup->replaced) {
174 server->backup->replaced =
175 silc_calloc(1, sizeof(*server->backup->replaced));
176 server->backup->replaced_count = 1;
179 SILC_LOG_DEBUG(("********************************"));
180 SILC_LOG_DEBUG(("Replaced added"));
182 memcpy(&r->ip, &server_id->ip, sizeof(server_id->ip));
183 //r->port = server_id->port;
184 r->server = server_entry;
186 for (i = 0; i < server->backup->replaced_count; i++) {
187 if (!server->backup->replaced[i]) {
188 server->backup->replaced[i] = r;
193 i = server->backup->replaced_count;
194 server->backup->replaced = silc_realloc(server->backup->replaced,
195 sizeof(*server->backup->replaced) *
197 server->backup->replaced[i] = r;
198 server->backup->replaced_count++;
201 /* Checks whether the IP address and port from the `server_id' has been
202 replaced by an backup router. If it has been then this returns TRUE
203 and the bacup router entry to the `server' pointer if non-NULL. Returns
204 FALSE if the router is not replaced by backup router. */
206 bool silc_server_backup_replaced_get(SilcServer server,
207 SilcServerID *server_id,
208 SilcServerEntry *server_entry)
212 SILC_LOG_DEBUG(("Start"));
214 SILC_LOG_DEBUG(("*************************************"));
216 if (!server->backup || !server->backup->replaced)
219 for (i = 0; i < server->backup->replaced_count; i++) {
220 if (!server->backup->replaced[i])
222 SILC_LOG_HEXDUMP(("IP"), server_id->ip.data, server_id->ip.data_len);
223 SILC_LOG_HEXDUMP(("IP"), server->backup->replaced[i]->ip.data,
224 server->backup->replaced[i]->ip.data_len);
225 if (!memcmp(&server->backup->replaced[i]->ip, &server_id->ip.data,
226 sizeof(server_id->ip.data))) {
228 *server_entry = server->backup->replaced[i]->server;
229 SILC_LOG_DEBUG(("REPLACED"));
234 SILC_LOG_DEBUG(("NOT REPLACED"));
238 /* Deletes a replaced host by the set `server_entry. */
240 void silc_server_backup_replaced_del(SilcServer server,
241 SilcServerEntry server_entry)
245 SILC_LOG_DEBUG(("Start"));
247 if (!server->backup || !server->backup->replaced)
250 for (i = 0; i < server->backup->replaced_count; i++) {
251 if (!server->backup->replaced[i])
253 if (server->backup->replaced[i]->server == server_entry) {
254 silc_free(server->backup->replaced[i]);
255 server->backup->replaced[i] = NULL;
261 /* Broadcast the received packet indicated by `packet' to all of our backup
262 routers. All router wide information is passed using broadcast packets.
263 That is why all backup routers need to get this data too. It is expected
264 that the caller already knows that the `packet' is broadcast packet. */
266 void silc_server_backup_broadcast(SilcServer server,
267 SilcSocketConnection sender,
268 SilcPacketContext *packet)
270 SilcServerEntry backup;
271 SilcSocketConnection sock;
273 SilcIDListData idata;
276 if (!server->backup || server->server_type != SILC_ROUTER)
279 SILC_LOG_DEBUG(("Broadcasting received packet to backup routers"));
281 buffer = packet->buffer;
282 silc_buffer_push(buffer, buffer->data - buffer->head);
284 for (i = 0; i < server->backup->servers_count; i++) {
285 backup = server->backup->servers[i].server;
287 if (!backup || backup->connection == sender ||
288 server->backup->servers[i].local == FALSE)
291 idata = (SilcIDListData)backup;
292 sock = backup->connection;
294 silc_packet_send_prepare(sock, 0, 0, buffer->len);
295 silc_buffer_put(sock->outbuf, buffer->data, buffer->len);
296 silc_packet_encrypt(idata->send_key, idata->hmac_send,
297 sock->outbuf, sock->outbuf->len);
299 SILC_LOG_HEXDUMP(("Broadcasted packet, len %d", sock->outbuf->len),
300 sock->outbuf->data, sock->outbuf->len);
302 /* Now actually send the packet */
303 silc_server_packet_send_real(server, sock, FALSE);
307 /* A generic routine to send data to all backup routers. If the `sender'
308 is provided it will indicate the original sender of the packet and the
309 packet won't be resent to that entity. The `data' is the data that will
310 be assembled to packet context before sending. The packet will be
311 encrypted this function. If the `force_send' is TRUE the data is sent
312 immediately and not put to queue. If `local' is TRUE then the packet
313 will be sent only to local backup routers inside the cell. If false the
314 packet can go from one cell to the other. This function has no effect
315 if there are no any backup routers. */
317 void silc_server_backup_send(SilcServer server,
318 SilcServerEntry sender,
320 SilcPacketFlags flags,
326 SilcServerEntry backup;
327 SilcSocketConnection sock;
330 if (!server->backup || server->server_type != SILC_ROUTER)
333 SILC_LOG_DEBUG(("Start"));
335 for (i = 0; i < server->backup->servers_count; i++) {
336 backup = server->backup->servers[i].server;
340 if (sender == backup)
343 if (local && server->backup->servers[i].local == FALSE)
346 sock = backup->connection;
347 silc_server_packet_send(server, backup->connection, type, flags,
348 data, data_len, force_send);
352 /* Same as silc_server_backup_send but sets a specific Destination ID to
353 the packet. The Destination ID is indicated by the `dst_id' and the
354 ID type `dst_id_type'. For example, packets destined to channels must
355 be sent using this function. */
357 void silc_server_backup_send_dest(SilcServer server,
358 SilcServerEntry sender,
360 SilcPacketFlags flags,
362 SilcIdType dst_id_type,
368 SilcServerEntry backup;
369 SilcSocketConnection sock;
372 if (!server->backup || server->server_type != SILC_ROUTER)
375 SILC_LOG_DEBUG(("Start"));
377 for (i = 0; i < server->backup->servers_count; i++) {
378 backup = server->backup->servers[i].server;
382 if (sender == backup)
385 if (local && server->backup->servers[i].local == FALSE)
388 sock = backup->connection;
389 silc_server_packet_send_dest(server, backup->connection, type, flags,
390 dst_id, dst_id_type, data, data_len,
395 /* Processes incoming RESUME_ROUTER packet. This can give the packet
396 for processing to the protocol handler or allocate new protocol if
397 start command is received. */
399 void silc_server_backup_resume_router(SilcServer server,
400 SilcSocketConnection sock,
401 SilcPacketContext *packet)
404 SilcServerBackupProtocolContext ctx;
407 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
408 sock->type == SILC_SOCKET_TYPE_UNKNOWN)
411 SILC_LOG_DEBUG(("Start"));
413 ret = silc_buffer_unformat(packet->buffer,
414 SILC_STR_UI_CHAR(&type),
415 SILC_STR_UI_CHAR(&session),
420 /* Activate the protocol for this socket if necessary */
421 if ((type == SILC_SERVER_BACKUP_RESUMED ||
422 type == SILC_SERVER_BACKUP_RESUMED_GLOBAL) &&
423 sock->type == SILC_SOCKET_TYPE_ROUTER && !sock->protocol &&
424 ((SilcIDListData)sock->user_data)->status &
425 SILC_IDLIST_STATUS_DISABLED) {
426 SilcServerEntry backup_router;
428 if (silc_server_backup_replaced_get(server,
429 ((SilcServerEntry)sock->
432 SilcSocketConnection bsock =
433 (SilcSocketConnection)backup_router->connection;
434 if (bsock->protocol && bsock->protocol->protocol &&
435 bsock->protocol->protocol->type == SILC_PROTOCOL_SERVER_BACKUP) {
436 sock->protocol = bsock->protocol;
437 ctx = sock->protocol->context;
443 /* If the backup resuming protocol is active then process the packet
445 if (sock->protocol && sock->protocol->protocol &&
446 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_BACKUP) {
447 ctx = sock->protocol->context;
450 SILC_LOG_DEBUG(("********************************"));
451 SILC_LOG_DEBUG(("Continuing protocol, type %d", type));
453 if (type != SILC_SERVER_BACKUP_RESUMED &&
454 type != SILC_SERVER_BACKUP_RESUMED_GLOBAL) {
455 for (i = 0; i < ctx->sessions_count; i++) {
456 if (session == ctx->sessions[i].session) {
457 ctx->session = session;
458 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
463 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
467 SILC_LOG_DEBUG(("Bad resume router packet"));
471 /* We don't have protocol active. If we are router and the packet is
472 coming from our primary router then lets check whether it means we've
473 been replaced by an backup router in my cell. This is usually received
474 immediately after we've connected to our primary router. */
476 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
477 server->router == sock->user_data &&
478 type == SILC_SERVER_BACKUP_REPLACED) {
479 /* We have been replaced by an backup router in our cell. We must
480 mark our primary router connection disabled since we are not allowed
481 to use it at this moment. */
482 SilcIDListData idata = (SilcIDListData)sock->user_data;
484 SILC_LOG_INFO(("We are replaced by an backup router in this cell, will "
485 "wait until backup resuming protocol is executed"));
487 SILC_LOG_DEBUG(("We are replaced by an backup router in this cell"));
488 idata->status |= SILC_IDLIST_STATUS_DISABLED;
492 if (type == SILC_SERVER_BACKUP_START ||
493 type == SILC_SERVER_BACKUP_START_GLOBAL) {
494 /* We have received a start for resuming protocol. */
495 SilcServerBackupProtocolContext proto_ctx;
497 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
498 proto_ctx->server = server;
499 proto_ctx->sock = sock;
500 proto_ctx->responder = TRUE;
501 proto_ctx->type = type;
502 proto_ctx->session = session;
503 proto_ctx->start = time(0);
505 SILC_LOG_DEBUG(("Starting backup resuming protocol as responder"));
507 /* Run the backup resuming protocol */
508 silc_protocol_alloc(SILC_PROTOCOL_SERVER_BACKUP,
509 &sock->protocol, proto_ctx,
510 silc_server_protocol_backup_done);
511 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
515 /* Timeout task callback to connect to remote router */
517 SILC_TASK_CALLBACK(silc_server_backup_connect_to_router)
519 SilcServerConnection sconn = (SilcServerConnection)context;
520 SilcServer server = sconn->server;
523 SILC_LOG_DEBUG(("Connecting to router %s:%d", sconn->remote_host,
524 sconn->remote_port));
526 /* Connect to remote host */
527 sock = silc_net_create_connection(server->config->listen_port->local_ip,
531 silc_schedule_task_add(server->schedule, 0,
532 silc_server_backup_connect_to_router,
533 context, 5, 0, SILC_TASK_TIMEOUT,
534 SILC_TASK_PRI_NORMAL);
538 /* Continue with key exchange protocol */
539 silc_server_start_key_exchange(server, sconn, sock);
542 /* Constantly tries to reconnect to a primary router indicated by the
543 `ip' and `port'. The `connected' callback will be called when the
544 connection is created. */
546 void silc_server_backup_reconnect(SilcServer server,
547 const char *ip, uint16 port,
548 SilcServerConnectRouterCallback callback,
551 SilcServerConnection sconn;
553 sconn = silc_calloc(1, sizeof(*sconn));
554 sconn->server = server;
555 sconn->remote_host = strdup(ip);
556 sconn->remote_port = port;
557 sconn->callback = callback;
558 sconn->callback_context = context;
559 silc_schedule_task_add(server->schedule, 0,
560 silc_server_backup_connect_to_router,
561 sconn, 1, 0, SILC_TASK_TIMEOUT,
562 SILC_TASK_PRI_NORMAL);
565 SILC_TASK_CALLBACK(silc_server_backup_connected_later)
567 SilcServerBackupProtocolContext proto_ctx =
568 (SilcServerBackupProtocolContext)context;
569 SilcServer server = proto_ctx->server;
570 SilcSocketConnection sock = proto_ctx->sock;
572 SILC_LOG_DEBUG(("Starting backup resuming protocol as initiator"));
574 /* Run the backup resuming protocol */
575 silc_protocol_alloc(SILC_PROTOCOL_SERVER_BACKUP,
576 &sock->protocol, proto_ctx,
577 silc_server_protocol_backup_done);
578 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
581 /* Called when we've established connection back to our primary router
582 when we've acting as backup router and have replaced the primary router
583 in the cell. This function will start the backup resuming protocol. */
585 void silc_server_backup_connected(SilcServer server,
586 SilcServerEntry server_entry,
589 SilcServerBackupProtocolContext proto_ctx;
590 SilcSocketConnection sock = (SilcSocketConnection)server_entry->connection;
592 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
593 proto_ctx->server = server;
594 proto_ctx->sock = sock;
595 proto_ctx->responder = FALSE;
596 proto_ctx->type = SILC_SERVER_BACKUP_START;
597 proto_ctx->start = time(0);
599 /* Start through scheduler */
600 silc_schedule_task_add(server->schedule, 0,
601 silc_server_backup_connected_later,
604 SILC_TASK_PRI_NORMAL);
607 /* Called when normal server has connected to its primary router after
608 backup router has sent the START packet in reusming protocol. We will
609 move the protocol context from the backup router connection to the
612 static void silc_server_backup_connect_primary(SilcServer server,
613 SilcServerEntry server_entry,
616 SilcSocketConnection backup_router = (SilcSocketConnection)context;
617 SilcSocketConnection sock = (SilcSocketConnection)server_entry->connection;
618 SilcIDListData idata = (SilcIDListData)server_entry;
619 SilcServerBackupProtocolContext ctx =
620 (SilcServerBackupProtocolContext)backup_router->protocol->context;
623 SILC_LOG_DEBUG(("Start"));
625 SILC_LOG_DEBUG(("********************************"));
626 SILC_LOG_DEBUG(("Sending CONNECTED packet, session %d", ctx->session));
628 /* Send the CONNECTED packet back to the backup router. */
629 buffer = silc_buffer_alloc(2);
630 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
631 silc_buffer_format(buffer,
632 SILC_STR_UI_CHAR(SILC_SERVER_BACKUP_CONNECTED),
633 SILC_STR_UI_CHAR(ctx->session),
635 silc_server_packet_send(server, backup_router,
636 SILC_PACKET_RESUME_ROUTER, 0,
637 buffer->data, buffer->len, FALSE);
638 silc_buffer_free(buffer);
640 /* The primary connection is disabled until it sends the RESUMED packet
642 idata->status |= SILC_IDLIST_STATUS_DISABLED;
644 /* Move this protocol context from this backup router connection to
645 the primary router connection since it will send the subsequent
646 packets in this protocol. We don't talk with backup router
648 sock->protocol = backup_router->protocol;
649 ctx->sock = (SilcSocketConnection)server_entry->connection;
650 backup_router->protocol = NULL;
653 /* Resume protocol with RESUME_ROUTER packet:
655 SILC_PACKET_RESUME_ROUTER:
657 <uint8 type> <uint8 Session ID>
659 <type> = the protocol opcode
660 <Session ID> = Identifier for this packet and any subsequent reply
661 packets must include this identifier.
665 1 = To router: Comensing backup resuming protocol. This will
666 indicate that the sender is backup router acting as primary
667 and the receiver is primary router that has been replaced by
670 To server. Comensing backup resuming protocol. This will
671 indicate that the sender is backup router and the receiver
672 must reconnect to the real primary router of the cell.
674 2 = To Router: Comesning backup resuming protocol in another
675 cell. The receiver will connect to its primary router
676 (the router that is now online again) but will not use
677 the link. If the receiver is not configured to connect
678 to any router it does as locally configured. The sender
679 is always backup router.
681 To server: this is never sent to server.
683 3 = To backup router: Sender is normal server or router and it
684 tells to backup router that they have connected to the
685 primary router. Backup router never sends this type.
687 4 = To router: Ending backup resuming protocol. This is sent
688 to the real primary router to tell that it can take over
689 the task as being primary router.
691 To server: same as sending for router.
693 Backup router sends this also to the primary route but only
694 after it has sent them to normal servers and has purged all
695 traffic coming from normal servers.
697 5 = To router: Sender is the real primary router after it has
698 received type 4 from backup router. To tell that it is again
699 primary router of the cell.
701 20 = To router: This is sent only when router is connecting to
702 another router and has been replaced by an backup router.
703 The sender knows that the connectee has been replaced.
707 /* Backup resuming protocol. This protocol is executed when the primary
708 router wants to resume its position as being primary router. */
710 SILC_TASK_CALLBACK_GLOBAL(silc_server_protocol_backup)
712 SilcProtocol protocol = (SilcProtocol)context;
713 SilcServerBackupProtocolContext ctx = protocol->context;
714 SilcServer server = ctx->server;
716 SilcIDCacheList list;
717 SilcIDCacheEntry id_cache;
718 SilcServerEntry server_entry;
721 SILC_LOG_DEBUG(("Start"));
723 if (protocol->state == SILC_PROTOCOL_STATE_UNKNOWN)
724 protocol->state = SILC_PROTOCOL_STATE_START;
726 SILC_LOG_DEBUG(("State=%d", protocol->state));
728 switch(protocol->state) {
729 case SILC_PROTOCOL_STATE_START:
730 if (ctx->responder == FALSE) {
731 /* Initiator of the protocol. We are backup router */
733 packet = silc_buffer_alloc(2);
734 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
736 SILC_LOG_DEBUG(("********************************"));
737 SILC_LOG_DEBUG(("Sending START packets"));
739 /* Send the START packet to primary router and normal servers. */
740 if (silc_idcache_get_all(server->local_list->servers, &list)) {
741 if (silc_idcache_list_first(list, &id_cache)) {
743 server_entry = (SilcServerEntry)id_cache->context;
744 if ((server_entry == server->id_entry) ||
745 !server_entry->connection) {
746 if (!silc_idcache_list_next(list, &id_cache))
752 ctx->sessions = silc_realloc(ctx->sessions,
753 sizeof(*ctx->sessions) *
754 (ctx->sessions_count + 1));
755 ctx->sessions[ctx->sessions_count].session = ctx->sessions_count;
756 ctx->sessions[ctx->sessions_count].connected = FALSE;
757 ctx->sessions[ctx->sessions_count].server_entry = server_entry;
759 SILC_LOG_DEBUG(("********************************"));
760 SILC_LOG_DEBUG(("START for session %d", ctx->sessions_count));
762 /* This connection is performing this protocol too now */
763 ((SilcSocketConnection)server_entry->connection)->protocol =
766 if (server_entry->server_type == SILC_ROUTER)
767 packet->data[0] = SILC_SERVER_BACKUP_START;
769 packet->data[0] = SILC_SERVER_BACKUP_START_GLOBAL;
770 packet->data[1] = ctx->sessions_count;
771 silc_server_packet_send(server, server_entry->connection,
772 SILC_PACKET_RESUME_ROUTER, 0,
773 packet->data, packet->len, FALSE);
774 ctx->sessions_count++;
776 if (!silc_idcache_list_next(list, &id_cache))
781 silc_idcache_list_free(list);
784 silc_buffer_free(packet);
786 /* If we are router then announce our possible servers. */
787 if (server->server_type == SILC_ROUTER)
788 silc_server_announce_servers(server, FALSE, 0, ctx->sock);
789 silc_server_announce_clients(server, 0, ctx->sock);
790 silc_server_announce_channels(server, 0, ctx->sock);
794 /* Responder of the protocol. */
795 SilcServerConfigSectionServerConnection *primary;
797 /* We should have received START or START_GLOBAL packet */
798 if (ctx->type != SILC_SERVER_BACKUP_START &&
799 ctx->type != SILC_SERVER_BACKUP_START_GLOBAL) {
800 SILC_LOG_DEBUG(("Bad resume router packet"));
804 SILC_LOG_DEBUG(("********************************"));
805 SILC_LOG_DEBUG(("Received START packet, reconnecting to router"));
807 /* Connect to the primary router that was down that is now supposed
808 to be back online. We send the CONNECTED packet after we've
809 established the connection to the primary router. */
810 primary = silc_server_config_get_primary_router(server->config);
811 if (primary && server->backup_primary) {
812 silc_server_backup_reconnect(server,
813 primary->host, primary->port,
814 silc_server_backup_connect_primary,
817 /* Nowhere to connect just return the CONNECTED packet */
819 SILC_LOG_DEBUG(("********************************"));
820 SILC_LOG_DEBUG(("Sending CONNECTED packet, session %d", ctx->session));
822 /* Send the CONNECTED packet back to the backup router. */
823 packet = silc_buffer_alloc(2);
824 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
825 silc_buffer_format(packet,
826 SILC_STR_UI_CHAR(SILC_SERVER_BACKUP_CONNECTED),
827 SILC_STR_UI_CHAR(ctx->session),
829 silc_server_packet_send(server, ctx->sock,
830 SILC_PACKET_RESUME_ROUTER, 0,
831 packet->data, packet->len, FALSE);
832 silc_buffer_free(packet);
835 if (server->server_type == SILC_ROUTER &&
837 server->router->data.status & SILC_IDLIST_STATUS_DISABLED))
840 protocol->state = SILC_PROTOCOL_STATE_END;
842 ctx->sessions = silc_realloc(ctx->sessions,
843 sizeof(*ctx->sessions) *
844 (ctx->sessions_count + 1));
845 ctx->sessions[ctx->sessions_count].session = ctx->session;
846 ctx->sessions_count++;
851 if (ctx->responder == FALSE) {
854 /* We should have received CONNECTED packet */
855 if (ctx->type != SILC_SERVER_BACKUP_CONNECTED) {
856 SILC_LOG_DEBUG(("Bad resume router packet"));
860 SILC_LOG_DEBUG(("********************************"));
861 SILC_LOG_DEBUG(("Received CONNECTED packet, session %d", ctx->session));
863 for (i = 0; i < ctx->sessions_count; i++) {
864 if (ctx->sessions[i].session == ctx->session) {
865 ctx->sessions[i].connected = TRUE;
870 for (i = 0; i < ctx->sessions_count; i++) {
871 if (!ctx->sessions[i].connected)
875 SILC_LOG_DEBUG(("********************************"));
876 SILC_LOG_DEBUG(("Sending ENDING packet to primary"));
878 for (i = 0; i < ctx->sessions_count; i++)
879 if (ctx->sessions[i].server_entry == ctx->sock->user_data)
880 ctx->session = ctx->sessions[i].session;
882 /* We've received all the CONNECTED packets and now we'll send the
883 ENDING packet to the new primary router. */
884 packet = silc_buffer_alloc(2);
885 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
886 silc_buffer_format(packet,
887 SILC_STR_UI_CHAR(SILC_SERVER_BACKUP_ENDING),
888 SILC_STR_UI_CHAR(ctx->session),
890 silc_server_packet_send(server, ctx->sock,
891 SILC_PACKET_RESUME_ROUTER, 0,
892 packet->data, packet->len, FALSE);
893 silc_buffer_free(packet);
895 protocol->state = SILC_PROTOCOL_STATE_END;
899 /* We should have been received ENDING packet */
900 if (ctx->type != SILC_SERVER_BACKUP_ENDING) {
901 SILC_LOG_DEBUG(("Bad resume router packet"));
905 SILC_LOG_DEBUG(("********************************"));
906 SILC_LOG_DEBUG(("Received ENDING packet, sending RESUMED packets"));
908 /* This state is received by the primary router but also servers
909 and perhaps other routers so check that if we are the primary
910 router of the cell then start sending RESUMED packets. If we
911 are normal server or one of those other routers then procede
913 if (server->router &&
914 !(server->router->data.status & SILC_IDLIST_STATUS_DISABLED) &&
915 silc_server_config_is_primary_route(server->config)) {
916 /* We'll wait for RESUMED packet */
917 protocol->state = SILC_PROTOCOL_STATE_END;
921 /* Switch announced informations to our entry instead of using the
923 silc_server_update_clients_by_server(server, ctx->sock->user_data,
924 server->id_entry, TRUE, FALSE);
926 packet = silc_buffer_alloc(2);
927 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
929 /* We are the primary router, start sending RESUMED packets. */
930 if (silc_idcache_get_all(server->local_list->servers, &list)) {
931 if (silc_idcache_list_first(list, &id_cache)) {
933 server_entry = (SilcServerEntry)id_cache->context;
934 if ((server_entry == server->id_entry) ||
935 !server_entry->connection) {
936 if (!silc_idcache_list_next(list, &id_cache))
942 SILC_LOG_DEBUG(("********************************"));
943 SILC_LOG_DEBUG(("RESUMED packet"));
945 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
947 /* This connection is performing this protocol too now */
948 ((SilcSocketConnection)server_entry->connection)->protocol =
951 if (server_entry->server_type == SILC_ROUTER)
952 packet->data[0] = SILC_SERVER_BACKUP_RESUMED;
954 packet->data[0] = SILC_SERVER_BACKUP_RESUMED_GLOBAL;
955 silc_server_packet_send(server, server_entry->connection,
956 SILC_PACKET_RESUME_ROUTER, 0,
957 packet->data, packet->len, FALSE);
959 if (!silc_idcache_list_next(list, &id_cache))
964 silc_idcache_list_free(list);
967 silc_buffer_free(packet);
969 SILC_LOG_INFO(("We are now the primary router of our cell again"));
971 /* For us this is the end of this protocol. */
972 if (protocol->final_callback)
973 silc_protocol_execute_final(protocol, server->schedule);
975 silc_protocol_free(protocol);
979 case SILC_PROTOCOL_STATE_END:
981 SilcIDListData idata;
982 SilcServerEntry router, backup_router;
984 /* We should have been received RESUMED packet from our primary
986 if (ctx->type != SILC_SERVER_BACKUP_RESUMED &&
987 ctx->type != SILC_SERVER_BACKUP_RESUMED_GLOBAL) {
988 SILC_LOG_DEBUG(("Bad resume router packet"));
992 SILC_LOG_DEBUG(("********************************"));
993 SILC_LOG_DEBUG(("Received RESUMED packet"));
995 /* We have now new primary router. All traffic goes there from now on. */
996 if (server->backup_router)
997 server->server_type = SILC_BACKUP_ROUTER;
999 router = (SilcServerEntry)ctx->sock->user_data;
1000 if (silc_server_backup_replaced_get(server, router->id,
1003 if (backup_router == server->router) {
1004 SILC_LOG_INFO(("Switching back to primary router %s",
1005 server->router->server_name));
1006 SILC_LOG_DEBUG(("Switching back to primary router %s",
1007 server->router->server_name));
1008 server->id_entry->router = router;
1009 server->router = router;
1011 SILC_LOG_INFO(("Resuming the use of router %s",
1012 router->server_name));
1013 SILC_LOG_DEBUG(("Resuming the use of router %s",
1014 router->server_name));
1017 idata = (SilcIDListData)server->router;
1018 idata->status &= ~SILC_IDLIST_STATUS_DISABLED;
1020 /* Update the client entries of the backup router to the new router */
1021 silc_server_update_clients_by_server(server, backup_router,
1022 router, FALSE, FALSE);
1023 silc_server_backup_replaced_del(server, backup_router);
1024 silc_server_backup_add(server, backup_router,
1025 ctx->sock->ip, ctx->sock->port,
1026 backup_router->server_type != SILC_ROUTER ?
1029 /* Announce all of our information to the router. */
1030 if (server->server_type == SILC_ROUTER)
1031 silc_server_announce_servers(server, FALSE, 0, router->connection);
1033 /* Announce our clients and channels to the router */
1034 silc_server_announce_clients(server, 0, router->connection);
1035 silc_server_announce_channels(server, 0, router->connection);
1038 /* Protocol has ended, call the final callback */
1039 if (protocol->final_callback)
1040 silc_protocol_execute_final(protocol, server->schedule);
1042 silc_protocol_free(protocol);
1046 case SILC_PROTOCOL_STATE_ERROR:
1047 /* Protocol has ended, call the final callback */
1048 if (protocol->final_callback)
1049 silc_protocol_execute_final(protocol, server->schedule);
1051 silc_protocol_free(protocol);
1054 case SILC_PROTOCOL_STATE_FAILURE:
1055 /* Protocol has ended, call the final callback */
1056 if (protocol->final_callback)
1057 silc_protocol_execute_final(protocol, server->schedule);
1059 silc_protocol_free(protocol);
1062 case SILC_PROTOCOL_STATE_UNKNOWN:
1067 SILC_TASK_CALLBACK(silc_server_protocol_backup_done)
1069 SilcProtocol protocol = (SilcProtocol)context;
1070 SilcServerBackupProtocolContext ctx = protocol->context;
1071 SilcServer server = ctx->server;
1072 SilcServerEntry server_entry;
1073 SilcSocketConnection sock;
1074 SilcIDCacheList list;
1075 SilcIDCacheEntry id_cache;
1077 SILC_LOG_DEBUG(("Start"));
1079 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1080 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1081 SILC_LOG_ERROR(("Error occurred during backup router resuming protcool"));
1084 /* Remove this protocol from all server entries that has it */
1085 if (silc_idcache_get_all(server->local_list->servers, &list)) {
1086 if (silc_idcache_list_first(list, &id_cache)) {
1088 server_entry = (SilcServerEntry)id_cache->context;
1089 sock = (SilcSocketConnection)server_entry->connection;
1091 if (sock->protocol == protocol) {
1092 sock->protocol = NULL;
1094 if (server_entry->data.status & SILC_IDLIST_STATUS_DISABLED)
1095 server_entry->data.status &= ~SILC_IDLIST_STATUS_DISABLED;
1098 if (!silc_idcache_list_next(list, &id_cache))
1102 silc_idcache_list_free(list);
1105 if (ctx->sock->protocol)
1106 ctx->sock->protocol = NULL;
1107 silc_protocol_free(protocol);
1108 silc_free(ctx->sessions);