server.c
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+ Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2001 Pekka Riikonen
+ Copyright (C) 1997 - 2002 Pekka Riikonen
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
/*
* This is the actual SILC server than handles everything relating to
- * servicing the SILC connections. This is also a SILC router as a router
+ * servicing the SILC connections. This is also a SILC router as a router
* is also normal server.
*/
/* $Id$ */
SILC_TASK_CALLBACK(silc_server_packet_process);
SILC_TASK_CALLBACK(silc_server_packet_parse_real);
SILC_TASK_CALLBACK(silc_server_timeout_remote);
+SILC_TASK_CALLBACK(silc_server_failure_callback);
+SILC_TASK_CALLBACK(silc_server_rekey_callback);
/* Allocates a new SILC server object. This has to be done before the server
can be used. After allocation one must call silc_server_init to initialize
SilcSimContext *sim;
#endif
- if (server->local_list)
- silc_free(server->local_list);
- if (server->global_list)
- silc_free(server->global_list);
+ silc_free(server->local_list);
+ silc_free(server->global_list);
if (server->rng)
silc_rng_free(server->rng);
+ if (server->pkcs)
+ silc_pkcs_free(server->pkcs);
+
#ifdef SILC_SIM
while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
silc_dlist_del(server->sim, sim);
silc_dlist_uninit(server->sim);
#endif
- if (server->params)
- silc_free(server->params);
-
if (server->pending_commands)
silc_dlist_uninit(server->pending_commands);
- silc_math_primegen_uninit(); /* XXX */
silc_free(server);
}
}
/* Initializes the entire SILC server. This is called always before running
the server. This is called only once at the initialization of the program.
- This binds the server to its listenning port. After this function returns
- one should call silc_server_run to start the server. This returns TRUE
+ This binds the server to its listenning port. After this function returns
+ one should call silc_server_run to start the server. This returns TRUE
when everything is ok to run the server. Configuration file must be
read and parsed before calling this. */
int silc_server_init(SilcServer server)
{
- int *sock = NULL, sock_count = 0, i;
+ int sock;
SilcServerID *id;
SilcServerEntry id_entry;
+ SilcIDListPurge purge;
SILC_LOG_DEBUG(("Initializing server"));
assert(server);
assert(server->config);
- /* XXX After server is made as Silc Server Library this can be given
- as argument, for now this is hard coded */
- server->params = silc_calloc(1, sizeof(*server->params));
- server->params->retry_count = SILC_SERVER_RETRY_COUNT;
- server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
- server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
- server->params->retry_keep_trying = FALSE;
- server->params->protocol_timeout = 60;
- server->params->require_reverse_mapping = FALSE;
-
- /* Set log files where log message should be saved. */
- server->config->server = server;
- silc_config_server_setlogfiles(server->config);
-
+ /* Set public and private keys */
+ if (!server->config->server_info ||
+ !server->config->server_info->public_key ||
+ !server->config->server_info->private_key) {
+ SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
+ return FALSE;
+ }
+ server->public_key = server->config->server_info->public_key;
+ server->private_key = server->config->server_info->private_key;
+
+ /* Set default to configuration parameters */
+ silc_server_config_set_defaults(server);
+
/* Register all configured ciphers, PKCS and hash functions. */
- silc_config_server_register_ciphers(server->config);
- silc_config_server_register_pkcs(server->config);
- silc_config_server_register_hashfuncs(server->config);
+ if (!silc_server_config_register_ciphers(server))
+ silc_cipher_register_default();
+ if (!silc_server_config_register_pkcs(server))
+ silc_pkcs_register_default();
+ if (!silc_server_config_register_hashfuncs(server))
+ silc_hash_register_default();
+ if (!silc_server_config_register_hmacs(server))
+ silc_hmac_register_default();
/* Initialize random number generator for the server. */
server->rng = silc_rng_alloc();
silc_rng_init(server->rng);
- silc_math_primegen_init(); /* XXX */
+ silc_rng_global_init(server->rng);
/* Initialize hash functions for server to use */
silc_hash_alloc("md5", &server->md5hash);
silc_hash_alloc("sha1", &server->sha1hash);
- /* Initialize none cipher */
- silc_cipher_alloc("none", &server->none_cipher);
-
- /* XXXXX Generate RSA key pair */
- {
- unsigned char *public_key;
- unsigned char *private_key;
- unsigned int pk_len, prv_len;
- struct stat st;
-
- if (stat("pubkey.pub", &st) < 0 && stat("privkey.prv", &st) < 0) {
-
- if (silc_pkcs_alloc("rsa", &server->pkcs) == FALSE) {
- SILC_LOG_ERROR(("Could not create RSA key pair"));
- goto err0;
- }
-
- if (server->pkcs->pkcs->init(server->pkcs->context,
- 1024, server->rng) == FALSE) {
- SILC_LOG_ERROR(("Could not generate RSA key pair"));
- goto err0;
- }
-
- public_key = server->pkcs->pkcs->get_public_key(server->pkcs->context,
- &pk_len);
- private_key = server->pkcs->pkcs->get_private_key(server->pkcs->context,
- &prv_len);
-
- SILC_LOG_HEXDUMP(("public key"), public_key, pk_len);
- SILC_LOG_HEXDUMP(("private key"), private_key, prv_len);
-
- server->public_key =
- silc_pkcs_public_key_alloc("rsa", "UN=root, HN=dummy",
- public_key, pk_len);
- server->private_key =
- silc_pkcs_private_key_alloc("rsa", private_key, prv_len);
-
- /* XXX Save keys */
- silc_pkcs_save_public_key("pubkey.pub", server->public_key,
- SILC_PKCS_FILE_PEM);
- silc_pkcs_save_private_key("privkey.prv", server->private_key, NULL,
- SILC_PKCS_FILE_BIN);
-
- memset(public_key, 0, pk_len);
- memset(private_key, 0, prv_len);
- silc_free(public_key);
- silc_free(private_key);
- } else {
- silc_pkcs_load_public_key("pubkey.pub", &server->public_key,
- SILC_PKCS_FILE_PEM);
- silc_pkcs_load_private_key("privkey.prv", &server->private_key,
- SILC_PKCS_FILE_BIN);
- }
- }
-
- /* Create a listening server. Note that our server can listen on
- multiple ports. All listeners are created here and now. */
- /* XXX Still check this whether to use server_info or listen_port. */
- sock_count = 0;
- while(server->config->listen_port) {
- int tmp;
+ /* Allocate PKCS context for local public and private keys */
+ silc_pkcs_alloc(server->public_key->name, &server->pkcs);
+ silc_pkcs_public_key_set(server->pkcs, server->public_key);
+ silc_pkcs_private_key_set(server->pkcs, server->private_key);
- tmp = silc_net_create_server(server->config->listen_port->port,
- server->config->listen_port->host);
- if (tmp < 0)
- goto err0;
-
- sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
- sock[sock_count] = tmp;
- server->config->listen_port = server->config->listen_port->next;
- sock_count++;
+ /* Create a listening server */
+ sock = silc_net_create_server(server->config->server_info->port,
+ server->config->server_info->server_ip);
+ if (sock < 0) {
+ SILC_LOG_ERROR(("Could not create server listener: %s on %hu",
+ server->config->server_info->server_ip,
+ server->config->server_info->port));
+ goto err;
}
/* Initialize ID caches */
- server->local_list->clients = silc_idcache_alloc(0);
- server->local_list->servers = silc_idcache_alloc(0);
- server->local_list->channels = silc_idcache_alloc(0);
+ server->local_list->clients =
+ silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
+ server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
+ server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
- /* These are allocated for normal server as well as these hold some
- global information that the server has fetched from its router. For
+ /* These are allocated for normal server as well as these hold some
+ global information that the server has fetched from its router. For
router these are used as they are supposed to be used on router. */
- server->global_list->clients = silc_idcache_alloc(0);
- server->global_list->servers = silc_idcache_alloc(0);
- server->global_list->channels = silc_idcache_alloc(0);
-
- /* Allocate the entire socket list that is used in server. Eventually
- all connections will have entry in this table (it is a table of
- pointers to the actual object that is allocated individually
+ server->global_list->clients =
+ silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
+ server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
+ server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
+
+ /* Allocate the entire socket list that is used in server. Eventually
+ all connections will have entry in this table (it is a table of
+ pointers to the actual object that is allocated individually
later). */
- server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
+ server->sockets = silc_calloc(server->config->param.connections_max,
sizeof(*server->sockets));
- for (i = 0; i < sock_count; i++) {
+ do {
SilcSocketConnection newsocket = NULL;
/* Set socket to non-blocking mode */
- silc_net_set_socket_nonblock(sock[i]);
- server->sock = sock[i];
-
- /* Create a Server ID for the server. */
- silc_id_create_server_id(sock[i], server->rng, &id);
- if (!id) {
- goto err0;
+ silc_net_set_socket_nonblock(sock);
+ server->sock = sock;
+
+ /* Add ourselves also to the socket table. The entry allocated above
+ is sent as argument for fast referencing in the future. */
+ silc_socket_alloc(sock, SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
+ server->sockets[sock] = newsocket;
+
+ /* Perform name and address lookups to resolve the listenning address
+ and port. */
+ if (!silc_net_check_local_by_sock(sock, &newsocket->hostname,
+ &newsocket->ip)) {
+ if ((server->config->require_reverse_lookup && !newsocket->hostname) ||
+ !newsocket->ip) {
+ SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
+ newsocket->hostname ? newsocket->hostname :
+ newsocket->ip ? newsocket->ip : ""));
+ server->stat.conn_failures++;
+ goto err;
+ }
+ if (!newsocket->hostname)
+ newsocket->hostname = strdup(newsocket->ip);
}
-
+ newsocket->port = silc_net_get_local_port(sock);
+
+ /* Create a Server ID for the server. */
+ silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
+ if (!id)
+ goto err;
+
server->id = id;
server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
- server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
+ server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
server->id_type = SILC_ID_SERVER;
server->server_name = server->config->server_info->server_name;
- /* Add ourselves to the server list. We don't have a router yet
- beacuse we haven't established a route yet. It will be done later.
+ /* Add ourselves to the server list. We don't have a router yet
+ beacuse we haven't established a route yet. It will be done later.
For now, NULL is sent as router. This allocates new entry to
the ID list. */
- id_entry =
+ id_entry =
silc_idlist_add_server(server->local_list,
server->config->server_info->server_name,
server->server_type, server->id, NULL, NULL);
if (!id_entry) {
SILC_LOG_ERROR(("Could not add ourselves to cache"));
- goto err0;
+ goto err;
}
-
- /* Add ourselves also to the socket table. The entry allocated above
- is sent as argument for fast referencing in the future. */
- silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
- &newsocket);
- if (!newsocket)
- goto err0;
-
- server->sockets[sock[i]] = newsocket;
+ id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
- /* Put the allocated socket pointer also to the entry allocated above
+ /* Put the allocated socket pointer also to the entry allocated above
for fast back-referencing to the socket list. */
- id_entry->connection = (void *)server->sockets[sock[i]];
+ newsocket->user_data = (void *)id_entry;
+ id_entry->connection = (void *)newsocket;
server->id_entry = id_entry;
- }
-
- /* Register the task queues. In SILC we have by default three task queues.
- One task queue for non-timeout tasks which perform different kind of
- I/O on file descriptors, timeout task queue for timeout tasks, and,
- generic non-timeout task queue whose tasks apply to all connections. */
- silc_task_queue_alloc(&server->io_queue, TRUE);
- if (!server->io_queue) {
- goto err0;
- }
- silc_task_queue_alloc(&server->timeout_queue, TRUE);
- if (!server->timeout_queue) {
- goto err1;
- }
- silc_task_queue_alloc(&server->generic_queue, TRUE);
- if (!server->generic_queue) {
- goto err1;
- }
+ } while (0);
/* Register protocols */
silc_server_protocols_register();
- /* Initialize the scheduler */
- silc_schedule_init(&server->io_queue, &server->timeout_queue,
- &server->generic_queue,
- SILC_SERVER_MAX_CONNECTIONS);
-
- /* Add the first task to the queue. This is task that is executed by
+ /* Initialize the scheduler. */
+ server->schedule = silc_schedule_init(server->config->param.connections_max);
+ if (!server->schedule)
+ goto err;
+
+ /* Add the first task to the scheduler. This is task that is executed by
timeout. It expires as soon as the caller calls silc_server_run. This
task performs authentication protocol and key exchange with our
primary router. */
- silc_task_register(server->timeout_queue, sock[0],
- silc_server_connect_to_router,
- (void *)server, 0, 1,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_NORMAL);
+ silc_schedule_task_add(server->schedule, sock,
+ silc_server_connect_to_router,
+ (void *)server, 0, 1,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
- /* Add listener task to the queue. This task receives new connections to the
- server. This task remains on the queue until the end of the program. */
- silc_task_register(server->io_queue, sock[0],
- silc_server_accept_new_connection,
- (void *)server, 0, 0,
- SILC_TASK_FD,
- SILC_TASK_PRI_NORMAL);
+ /* Add listener task to the scheduler. This task receives new connections
+ to the server. This task remains on the queue until the end of the
+ program. */
+ silc_schedule_task_add(server->schedule, sock,
+ silc_server_accept_new_connection,
+ (void *)server, 0, 0,
+ SILC_TASK_FD,
+ SILC_TASK_PRI_NORMAL);
server->listenning = TRUE;
+ /* Send log file configuration */
+ silc_server_config_setlogfiles(server);
+
/* If server connections has been configured then we must be router as
normal server cannot have server connections, only router connections. */
- if (server->config->servers)
+ if (server->config->servers) {
+ SilcServerConfigServer *ptr = server->config->servers;
+
server->server_type = SILC_ROUTER;
+ while (ptr) {
+ if (ptr->backup_router) {
+ server->server_type = SILC_BACKUP_ROUTER;
+ server->backup_router = TRUE;
+ server->id_entry->server_type = SILC_BACKUP_ROUTER;
+ break;
+ }
+ ptr = ptr->next;
+ }
+ }
+
+ /* Register the ID Cache purge task. This periodically purges the ID cache
+ and removes the expired cache entries. */
+
+ /* Clients local list */
+ purge = silc_calloc(1, sizeof(*purge));
+ purge->cache = server->local_list->clients;
+ purge->schedule = server->schedule;
+ purge->timeout = 600;
+ silc_schedule_task_add(purge->schedule, 0,
+ silc_idlist_purge,
+ (void *)purge, purge->timeout, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
+
+ /* Clients global list */
+ purge = silc_calloc(1, sizeof(*purge));
+ purge->cache = server->global_list->clients;
+ purge->schedule = server->schedule;
+ purge->timeout = 300;
+ silc_schedule_task_add(purge->schedule, 0,
+ silc_idlist_purge,
+ (void *)purge, purge->timeout, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
SILC_LOG_DEBUG(("Server initialized"));
/* We are done here, return succesfully */
return TRUE;
- silc_task_queue_free(server->timeout_queue);
- err1:
- silc_task_queue_free(server->io_queue);
- err0:
- for (i = 0; i < sock_count; i++)
- silc_net_close_server(sock[i]);
-
+ err:
+ silc_net_close_server(sock);
return FALSE;
}
-/* Fork server to background and set gid+uid to non-root.
- Silcd will not run as root, so trying to set either user or group to
- root will cause silcd to exit. */
+/* Fork server to background */
void silc_server_daemonise(SilcServer server)
+{
+ int i;
+
+ SILC_LOG_DEBUG(("Forking SILC server to background"));
+
+ i = fork();
+
+ if (i < 0) {
+ SILC_LOG_DEBUG(("fork() failed, cannot proceed"));
+ exit(1);
+ }
+ else if (i) {
+ if (geteuid())
+ SILC_LOG_DEBUG(("Server started as user"));
+ else
+ SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
+ exit(0);
+ }
+ setsid();
+}
+
+/* Drop root privligies. If this cannot be done, die. */
+
+void silc_server_drop(SilcServer server)
{
/* Are we executing silcd as root or a regular user? */
- if (geteuid()==0) {
-
+ if (!geteuid()) {
struct passwd *pw;
struct group *gr;
char *user, *group;
-
- if (!server->config->identity || !server->config->identity->user ||
- !server->config->identity->group) {
- fprintf(stderr, "Error:"
+
+ /* Get the values given for user and group in configuration file */
+ user = server->config->server_info->user;
+ group = server->config->server_info->group;
+
+ if (!user || !group) {
+ fprintf(stderr, "Error:" /* XXX update this error message */
"\tSILC server must not be run as root. For the security of your\n"
"\tsystem it is strongly suggested that you run SILC under dedicated\n"
"\tuser account. Modify the [Identity] configuration section to run\n"
"\tthe server as non-root user.\n");
exit(1);
}
-
- /* Get the values given for user and group in configuration file */
- user=server->config->identity->user;
- group=server->config->identity->group;
-
- /* Check whether the user/group information is text */
- if (atoi(user)!=0 || atoi(group)!=0) {
- SILC_LOG_DEBUG(("Invalid user and/or group information"));
- SILC_LOG_DEBUG(("User and/or group given as number"));
+
+ /* Check whether the user/group does not begin with a number */
+ if (isdigit(user[0]) || isdigit(group[0])) {
+ SILC_LOG_DEBUG(("User and/or group starts with a number"));
fprintf(stderr, "Invalid user and/or group information\n");
fprintf(stderr, "Please assign them as names, not numbers\n");
exit(1);
}
-
- /* Catch the nasty incident of string "0" returning 0 from atoi */
- if (strcmp("0", user)==0 || strcmp("0", group)==0) {
- SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
- fprintf(stderr, "User and/or group configured to 0. Exiting\n");
- exit(1);
- }
-
- pw=getpwnam(user);
- gr=getgrnam(group);
- if (!pw) {
- fprintf(stderr, "No such user %s found\n", user);
+ if (!(pw = getpwnam(user))) {
+ fprintf(stderr, "Error: No such user %s found.\n", user);
exit(1);
}
-
- if (!gr) {
- fprintf(stderr, "No such group %s found\n", group);
+ if (!(gr = getgrnam(group))) {
+ fprintf(stderr, "Error: No such group %s found.\n", group);
exit(1);
}
-
+
/* Check whether user and/or group is set to root. If yes, exit
immediately. Otherwise, setgid and setuid server to user.group */
- if (gr->gr_gid==0 || pw->pw_uid==0) {
+ if ((gr->gr_gid == 0) || (pw->pw_uid == 0)) {
fprintf(stderr, "Error:"
"\tSILC server must not be run as root. For the security of your\n"
"\tsystem it is strongly suggested that you run SILC under dedicated\n"
"\tuser account. Modify the [Identity] configuration section to run\n"
"\tthe server as non-root user.\n");
exit(1);
- } else {
- /* Fork server to background, making it a daemon */
- if (fork()) {
- SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
- SILC_LOG_DEBUG(("Forking SILC server to background"));
- exit(0);
- }
- setsid();
-
- SILC_LOG_DEBUG(("Changing to group %s", group));
- if(setgid(gr->gr_gid)==0) {
- SILC_LOG_DEBUG(("Setgid to %s", group));
- } else {
- SILC_LOG_DEBUG(("Setgid to %s failed", group));
- fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
- group);
- exit(1);
- }
- SILC_LOG_DEBUG(("Changing to user nobody"));
- if(setuid(pw->pw_uid)==0) {
- SILC_LOG_DEBUG(("Setuid to %s", user));
- } else {
- SILC_LOG_DEBUG(("Setuid to %s failed", user));
- fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
- user);
- exit(1);
- }
}
- } else {
- /* Fork server to background, making it a daemon */
- if (fork()) {
- SILC_LOG_DEBUG(("Server started as user"));
- SILC_LOG_DEBUG(("Forking SILC server to background"));
- exit(0);
+
+ SILC_LOG_DEBUG(("Changing to group %s (gid=%u)", group, gr->gr_gid));
+ if (setgid(gr->gr_gid) != 0) {
+ fprintf(stderr, "Error: Failed setgid() to %s (gid=%u). Exiting.\n",
+ group, gr->gr_gid);
+ exit(1);
+ }
+#if defined HAVE_SETGROUPS && defined HAVE_INITGROUPS
+ SILC_LOG_DEBUG(("Removing supplementary groups"));
+ if (setgroups(0, NULL) != 0) {
+ fprintf(stderr, "Error: Failed setgroups() to NULL. Exiting.\n");
+ exit(1);
+ }
+ SILC_LOG_DEBUG(("Setting supplementary groups for user %s", user));
+ if (initgroups(user, gr->gr_gid) != 0) {
+ fprintf(stderr, "Error: Failed initgroups() for user %s (gid=%u). "
+ "Exiting.\n", user, gr->gr_gid);
+ exit(1);
+ }
+#endif
+ SILC_LOG_DEBUG(("Changing to user %s (uid=%u)", user, pw->pw_uid));
+ if (setuid(pw->pw_uid) != 0) {
+ fprintf(stderr, "Error: Failed to setuid() to %s (gid=%u). Exiting.\n",
+ user, pw->pw_uid);
+ exit(1);
}
- setsid();
}
}
-/* Stops the SILC server. This function is used to shutdown the server.
- This is usually called after the scheduler has returned. After stopping
- the server one should call silc_server_free. */
-
-void silc_server_stop(SilcServer server)
-{
- SILC_LOG_DEBUG(("Stopping server"));
-
- /* Stop the scheduler, although it might be already stopped. This
- doesn't hurt anyone. This removes all the tasks and task queues,
- as well. */
- silc_schedule_stop();
- silc_schedule_uninit();
-
- silc_server_protocols_unregister();
-
- SILC_LOG_DEBUG(("Server stopped"));
-}
-
-/* The heart of the server. This runs the scheduler thus runs the server.
+/* The heart of the server. This runs the scheduler thus runs the server.
When this returns the server has been stopped and the program will
be terminated. */
{
SILC_LOG_DEBUG(("Running server"));
+ SILC_LOG_INFO(("SILC Server started"));
+
/* Start the scheduler, the heart of the SILC server. When this returns
the program will be terminated. */
- silc_schedule();
+ silc_schedule(server->schedule);
}
-/* Timeout callback that will be called to retry connecting to remote
- router. This is used by both normal and router server. This will wait
- before retrying the connecting. The timeout is generated by exponential
- backoff algorithm. */
+/* Stops the SILC server. This function is used to shutdown the server.
+ This is usually called after the scheduler has returned. After stopping
+ the server one should call silc_server_free. */
-SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
+void silc_server_stop(SilcServer server)
{
- SilcServerConnection sconn = (SilcServerConnection)context;
- SilcServer server = sconn->server;
-
- SILC_LOG_INFO(("Retrying connecting to a router"));
+ SILC_LOG_DEBUG(("Stopping server"));
- /* Calculate next timeout */
- if (sconn->retry_count >= 1) {
- sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
- if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
- sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
- } else {
- sconn->retry_timeout = server->params->retry_interval_min;
+ if (server->schedule) {
+ silc_schedule_stop(server->schedule);
+ silc_schedule_uninit(server->schedule);
+ server->schedule = NULL;
}
- sconn->retry_count++;
- sconn->retry_timeout = sconn->retry_timeout +
- silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
- /* If we've reached max retry count, give up. */
- if (sconn->retry_count > server->params->retry_count &&
- server->params->retry_keep_trying == FALSE) {
- SILC_LOG_ERROR(("Could not connect to router, giving up"));
- return;
- }
+ silc_server_protocols_unregister();
- /* Wait one before retrying */
- silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
- context, sconn->retry_timeout,
- server->params->retry_interval_min_usec,
- SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
+ SILC_LOG_DEBUG(("Server stopped"));
}
-/* Generic routine to use connect to a router. */
+/* Function that is called when the network connection to a router has
+ been established. This will continue with the key exchange protocol
+ with the remote router. */
-SILC_TASK_CALLBACK(silc_server_connect_router)
-{
- SilcServerConnection sconn = (SilcServerConnection)context;
- SilcServer server = sconn->server;
+void silc_server_start_key_exchange(SilcServer server,
+ SilcServerConnection sconn,
+ int sock)
+{
SilcSocketConnection newsocket;
SilcProtocol protocol;
SilcServerKEInternalContext *proto_ctx;
- int sock;
+ SilcServerConfigRouter *conn = sconn->conn;
+ void *context;
- /* Connect to remote host */
- sock = silc_net_create_connection(sconn->remote_port,
- sconn->remote_host);
- if (sock < 0) {
- SILC_LOG_ERROR(("Could not connect to router"));
- silc_task_register(server->timeout_queue, fd,
- silc_server_connect_to_router_retry,
- context, 0, 1, SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_NORMAL);
- return;
- }
+ /* Cancel any possible retry timeouts */
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_connect_router);
/* Set socket options */
silc_net_set_socket_nonblock(sock);
proto_ctx->sock = newsocket;
proto_ctx->rng = server->rng;
proto_ctx->responder = FALSE;
-
+
+ /* Set Key Exchange flags from configuration, but fall back to global
+ settings too. */
+ SILC_GET_SKE_FLAGS(conn, proto_ctx);
+ if (server->config->param.key_exchange_pfs)
+ proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
+
/* Perform key exchange protocol. silc_server_connect_to_router_second
will be called after the protocol is finished. */
silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
/* Register a timeout task that will be executed if the protocol
is not executed within set limit. */
proto_ctx->timeout_task =
- silc_task_register(server->timeout_queue, sock,
- silc_server_timeout_remote,
- server, server->params->protocol_timeout,
- server->params->protocol_timeout_usec,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_LOW);
+ silc_schedule_task_add(server->schedule, sock,
+ silc_server_timeout_remote,
+ server, server->config->key_exchange_timeout, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_LOW);
/* Register the connection for network input and output. This sets
that scheduler will listen for incoming packets for this connection
- and sets that outgoing packets may be sent to this connection as
+ and sets that outgoing packets may be sent to this connection as
well. However, this doesn't set the scheduler for outgoing traffic,
it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
later when outgoing data is available. */
context = (void *)server;
SILC_REGISTER_CONNECTION_FOR_IO(sock);
-
+
/* Run the protocol */
- protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
+ silc_protocol_execute(protocol, server->schedule, 0, 0);
+}
+
+/* Timeout callback that will be called to retry connecting to remote
+ router. This is used by both normal and router server. This will wait
+ before retrying the connecting. The timeout is generated by exponential
+ backoff algorithm. */
+
+SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
+{
+ SilcServerConnection sconn = (SilcServerConnection)context;
+ SilcServer server = sconn->server;
+ SilcServerConfigConnParams *param =
+ (sconn->param ? sconn->param : &server->config->param);
+
+ SILC_LOG_INFO(("Retrying connecting to a router"));
+
+ /* Calculate next timeout */
+ if (sconn->retry_count >= 1) {
+ sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
+ if (sconn->retry_timeout > param->reconnect_interval_max)
+ sconn->retry_timeout = param->reconnect_interval_max;
+ } else {
+ sconn->retry_timeout = param->reconnect_interval;
+ }
+ sconn->retry_count++;
+ sconn->retry_timeout = sconn->retry_timeout +
+ silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
+
+ /* If we've reached max retry count, give up. */
+ if (sconn->retry_count > param->reconnect_count &&
+ param->reconnect_keep_trying == FALSE) {
+ SILC_LOG_ERROR(("Could not connect to router, giving up"));
+ silc_free(sconn->remote_host);
+ silc_free(sconn);
+ return;
+ }
+
+ /* Wait one before retrying */
+ silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
+ context, sconn->retry_timeout, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
+}
+
+/* Generic routine to use connect to a router. */
+
+SILC_TASK_CALLBACK(silc_server_connect_router)
+{
+ SilcServerConnection sconn = (SilcServerConnection)context;
+ SilcServer server = sconn->server;
+ int sock;
+
+ SILC_LOG_INFO(("Connecting to the %s %s on port %d",
+ (sconn->backup ? "backup router" : "router"),
+ sconn->remote_host, sconn->remote_port));
+
+ server->router_connect = time(NULL);
+
+ /* Connect to remote host */
+ sock = silc_net_create_connection(server->config->server_info->server_ip,
+ sconn->remote_port,
+ sconn->remote_host);
+ if (sock < 0) {
+ SILC_LOG_ERROR(("Could not connect to router %s:%d",
+ sconn->remote_host, sconn->remote_port));
+ if (!sconn->no_reconnect)
+ silc_schedule_task_add(server->schedule, fd,
+ silc_server_connect_to_router_retry,
+ context, 0, 1, SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
+ return;
+ }
+
+ /* Continue with key exchange protocol */
+ silc_server_start_key_exchange(server, sconn, sock);
}
/* This function connects to our primary router or if we are a router this
{
SilcServer server = (SilcServer)context;
SilcServerConnection sconn;
+ SilcServerConfigRouter *ptr;
SILC_LOG_DEBUG(("Connecting to router(s)"));
- /* If we are normal SILC server we need to connect to our cell's
- router. */
if (server->server_type == SILC_SERVER) {
SILC_LOG_DEBUG(("We are normal server"));
+ } else if (server->server_type == SILC_ROUTER) {
+ SILC_LOG_DEBUG(("We are router"));
+ } else {
+ SILC_LOG_DEBUG(("We are backup router/normal server"));
+ }
- /* Create connection to the router, if configured. */
- if (server->config->routers) {
+ /* Create the connections to all our routes */
+ ptr = server->config->routers;
+ while (ptr) {
+
+ SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
+ ptr->backup_router ? "Backup router" : "Router",
+ ptr->initiator ? "Initiator" : "Responder",
+ ptr->host, ptr->port));
+ if (ptr->initiator) {
/* Allocate connection object for hold connection specific stuff. */
sconn = silc_calloc(1, sizeof(*sconn));
sconn->server = server;
- sconn->remote_host = server->config->routers->host;
- sconn->remote_port = server->config->routers->port;
-
- silc_task_register(server->timeout_queue, fd,
- silc_server_connect_router,
- (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_NORMAL);
- return;
- }
- }
-
- /* If we are a SILC router we need to establish all of our primary
- routes. */
- if (server->server_type == SILC_ROUTER) {
- SilcConfigServerSectionServerConnection *ptr;
-
- SILC_LOG_DEBUG(("We are router"));
-
- /* Create the connections to all our routes */
- ptr = server->config->routers;
- while (ptr) {
-
- SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
- ptr->initiator ? "Initiator" : "Responder",
- ptr->host, ptr->port));
-
- if (ptr->initiator) {
- /* Allocate connection object for hold connection specific stuff. */
- sconn = silc_calloc(1, sizeof(*sconn));
- sconn->server = server;
- sconn->remote_host = ptr->host;
- sconn->remote_port = ptr->port;
-
- silc_task_register(server->timeout_queue, fd,
- silc_server_connect_router,
- (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_NORMAL);
+ sconn->remote_host = strdup(ptr->host);
+ sconn->remote_port = ptr->port;
+ sconn->backup = ptr->backup_router;
+ if (sconn->backup) {
+ sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
+ sconn->backup_replace_port = ptr->backup_replace_port;
}
- if (!ptr->next)
- return;
+ if (!server->router_conn && !sconn->backup)
+ server->router_conn = sconn;
- ptr = ptr->next;
+ sconn->conn = ptr;
+ sconn->param = ptr->param;
+
+ silc_schedule_task_add(server->schedule, fd,
+ silc_server_connect_router,
+ (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
}
+
+ if (!ptr->next)
+ return;
+
+ ptr = ptr->next;
}
SILC_LOG_DEBUG(("No router(s), server will be standalone"));
(SilcServerKEInternalContext *)protocol->context;
SilcServer server = (SilcServer)ctx->server;
SilcServerConnection sconn = (SilcServerConnection)ctx->context;
- SilcSocketConnection sock = NULL;
+ SilcSocketConnection sock = ctx->sock;
SilcServerConnAuthInternalContext *proto_ctx;
+ SilcServerConfigRouter *conn = NULL;
SILC_LOG_DEBUG(("Start"));
- if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
+ if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
+ protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
/* Error occured during protocol */
silc_protocol_free(protocol);
+ sock->protocol = NULL;
+ silc_ske_free_key_material(ctx->keymat);
if (ctx->packet)
silc_packet_context_free(ctx->packet);
if (ctx->ske)
silc_ske_free(ctx->ske);
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
+ silc_free(ctx->dest_id);
silc_free(ctx);
- sock->protocol = NULL;
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_failure_callback);
silc_server_disconnect_remote(server, sock, "Server closed connection: "
"Key exchange failed");
return;
}
+ /* We now have the key material as the result of the key exchange
+ protocol. Take the key material into use. Free the raw key material
+ as soon as we've set them into use. */
+ if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
+ ctx->sock, ctx->keymat,
+ ctx->ske->prop->cipher,
+ ctx->ske->prop->pkcs,
+ ctx->ske->prop->hash,
+ ctx->ske->prop->hmac,
+ ctx->ske->prop->group,
+ ctx->responder)) {
+ silc_protocol_free(protocol);
+ sock->protocol = NULL;
+ silc_ske_free_key_material(ctx->keymat);
+ if (ctx->packet)
+ silc_packet_context_free(ctx->packet);
+ if (ctx->ske)
+ silc_ske_free(ctx->ske);
+ silc_free(ctx->dest_id);
+ silc_free(ctx);
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_failure_callback);
+ silc_server_disconnect_remote(server, sock, "Server closed connection: "
+ "Key exchange failed");
+ return;
+ }
+ silc_ske_free_key_material(ctx->keymat);
+
/* Allocate internal context for the authentication protocol. This
is sent as context for the protocol. */
proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
proto_ctx->server = (void *)server;
proto_ctx->context = (void *)sconn;
- proto_ctx->sock = sock = server->sockets[fd];
+ proto_ctx->sock = sock;
proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
proto_ctx->dest_id_type = ctx->dest_id_type;
proto_ctx->dest_id = ctx->dest_id;
- /* Resolve the authentication method used in this connection */
- proto_ctx->auth_meth = SILC_PROTOCOL_CONN_AUTH_PASSWORD;
- if (server->config->routers) {
- SilcConfigServerSectionServerConnection *conn = NULL;
-
- /* Check if we find a match from user configured connections */
- conn = silc_config_server_find_router_conn(server->config,
- sock->hostname,
+ /* Resolve the authentication method used in this connection. Check if
+ we find a match from user configured connections */
+ if (!sconn->conn)
+ conn = silc_server_config_find_router_conn(server, sock->hostname,
sock->port);
- if (conn) {
- /* Match found. Use the configured authentication method */
- proto_ctx->auth_meth = conn->auth_meth;
- if (conn->auth_data) {
- proto_ctx->auth_data = strdup(conn->auth_data);
- proto_ctx->auth_data_len = strlen(conn->auth_data);
+ else
+ conn = sconn->conn;
+
+ if (conn) {
+ /* Match found. Use the configured authentication method */
+ if (conn->passphrase) {
+ if (conn->publickey && !server->config->prefer_passphrase_auth) {
+ proto_ctx->auth_data = conn->publickey;
+ proto_ctx->auth_data_len = 0;
+ proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
+ } else {
+ proto_ctx->auth_data = strdup(conn->passphrase);
+ proto_ctx->auth_data_len = strlen(conn->passphrase);
+ proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
}
+ } else if (conn->publickey) {
+ proto_ctx->auth_data = conn->publickey;
+ proto_ctx->auth_data_len = 0;
+ proto_ctx->auth_meth = SILC_AUTH_PUBLIC_KEY;
} else {
- /* No match found. */
- /* XXX */
+ proto_ctx->auth_meth = SILC_AUTH_NONE;
}
} else {
- /* XXX */
- }
-
- /* Free old protocol as it is finished now */
+ SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
+ sock->hostname, sock->ip, sock->port));
+ silc_protocol_free(protocol);
+ sock->protocol = NULL;
+ if (ctx->packet)
+ silc_packet_context_free(ctx->packet);
+ if (ctx->ske)
+ silc_ske_free(ctx->ske);
+ silc_free(ctx->dest_id);
+ silc_free(ctx);
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_failure_callback);
+ silc_server_disconnect_remote(server, sock, "Server closed connection: "
+ "Key exchange failed");
+ return;
+ }
+
+ /* Free old protocol as it is finished now */
silc_protocol_free(protocol);
if (ctx->packet)
silc_packet_context_free(ctx->packet);
silc_server_connect_to_router_final);
/* Register timeout task. If the protocol is not executed inside
- this timelimit the connection will be terminated. Currently
- this is 15 seconds and is hard coded limit (XXX). */
- proto_ctx->timeout_task =
- silc_task_register(server->timeout_queue, sock->sock,
- silc_server_timeout_remote,
- (void *)server, 15, 0,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_LOW);
+ this timelimit the connection will be terminated. */
+ proto_ctx->timeout_task =
+ silc_schedule_task_add(server->schedule, sock->sock,
+ silc_server_timeout_remote,
+ (void *)server,
+ server->config->conn_auth_timeout, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_LOW);
/* Run the protocol */
- sock->protocol->execute(server->timeout_queue, 0,
- sock->protocol, sock->sock, 0, 0);
+ silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
}
/* Finalizes the connection to router. Registers a server task to the
SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
{
SilcProtocol protocol = (SilcProtocol)context;
- SilcServerConnAuthInternalContext *ctx =
+ SilcServerConnAuthInternalContext *ctx =
(SilcServerConnAuthInternalContext *)protocol->context;
SilcServer server = (SilcServer)ctx->server;
SilcServerConnection sconn = (SilcServerConnection)ctx->context;
SilcBuffer packet;
SilcServerHBContext hb_context;
unsigned char *id_string;
+ uint32 id_len;
+ SilcIDListData idata;
+ SilcServerConfigConnParams *param;
SILC_LOG_DEBUG(("Start"));
- if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
+ if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
+ protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
/* Error occured during protocol */
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
+ silc_free(ctx->dest_id);
silc_server_disconnect_remote(server, sock, "Server closed connection: "
"Authentication failed");
goto out;
}
- /* Add a task to the queue. This task receives new connections to the
+ /* Add a task to the queue. This task receives new connections to the
server. This task remains on the queue until the end of the program. */
- if (!server->listenning) {
- silc_task_register(server->io_queue, server->sock,
- silc_server_accept_new_connection,
- (void *)server, 0, 0,
- SILC_TASK_FD,
- SILC_TASK_PRI_NORMAL);
+ if (!server->listenning && !sconn->backup) {
+ silc_schedule_task_add(server->schedule, server->sock,
+ silc_server_accept_new_connection,
+ (void *)server, 0, 0,
+ SILC_TASK_FD,
+ SILC_TASK_PRI_NORMAL);
server->listenning = TRUE;
}
/* Send NEW_SERVER packet to the router. We will become registered
to the SILC network after sending this packet. */
id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
- packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
- strlen(server->server_name));
+ id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
+ packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
silc_buffer_format(packet,
- SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
- SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
+ SILC_STR_UI_SHORT(id_len),
+ SILC_STR_UI_XNSTRING(id_string, id_len),
SILC_STR_UI_SHORT(strlen(server->server_name)),
SILC_STR_UI_XNSTRING(server->server_name,
strlen(server->server_name)),
silc_buffer_free(packet);
silc_free(id_string);
- SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
+ SILC_LOG_INFO(("Connected to router %s", sock->hostname));
+
+ /* Check that we do not have this ID already */
+ id_entry = silc_idlist_find_server_by_id(server->local_list,
+ ctx->dest_id, TRUE, NULL);
+ if (id_entry) {
+ silc_idcache_del_by_context(server->local_list->servers, id_entry);
+ } else {
+ id_entry = silc_idlist_find_server_by_id(server->global_list,
+ ctx->dest_id, TRUE, NULL);
+ if (id_entry)
+ silc_idcache_del_by_context(server->global_list->servers, id_entry);
+ }
- /* Add the connected router to local server list */
- server->standalone = FALSE;
- id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
+ SILC_LOG_DEBUG(("New server id(%s)",
+ silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
+
+ /* Add the connected router to global server list */
+ id_entry = silc_idlist_add_server(server->global_list,
+ strdup(sock->hostname),
SILC_ROUTER, ctx->dest_id, NULL, sock);
if (!id_entry) {
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
+ silc_free(ctx->dest_id);
silc_server_disconnect_remote(server, sock, "Server closed connection: "
"Authentication failed");
goto out;
silc_free(sock->user_data);
sock->user_data = (void *)id_entry;
sock->type = SILC_SOCKET_TYPE_ROUTER;
- server->id_entry->router = id_entry;
- server->router = id_entry;
- server->router->data.registered = TRUE;
+ idata = (SilcIDListData)sock->user_data;
+ idata->status |= SILC_IDLIST_STATUS_REGISTERED;
+
+ param = (sconn->param ? sconn->param : &server->config->param);
/* Perform keepalive. The `hb_context' will be freed automatically
- when finally calling the silc_socket_free function. XXX hardcoded
- timeout!! */
+ when finally calling the silc_socket_free function. */
hb_context = silc_calloc(1, sizeof(*hb_context));
hb_context->server = server;
- silc_socket_set_heartbeat(sock, 600, hb_context,
+ silc_socket_set_heartbeat(sock, param->keepalive_secs, hb_context,
silc_server_perform_heartbeat,
- server->timeout_queue);
+ server->schedule);
+
+ /* Register re-key timeout */
+ idata->rekey->timeout = param->key_exchange_rekey;
+ idata->rekey->context = (void *)server;
+ silc_schedule_task_add(server->schedule, sock->sock,
+ silc_server_rekey_callback,
+ (void *)sock, idata->rekey->timeout, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
+
+ if (!sconn->backup) {
+ /* Mark this router our primary router if we're still standalone */
+ if (server->standalone) {
+ server->id_entry->router = id_entry;
+ server->router = id_entry;
+ server->standalone = FALSE;
+
+ /* If we are router then announce our possible servers. */
+ if (server->server_type == SILC_ROUTER)
+ silc_server_announce_servers(server, FALSE, 0,
+ server->router->connection);
+
+ /* Announce our clients and channels to the router */
+ silc_server_announce_clients(server, 0, server->router->connection);
+ silc_server_announce_channels(server, 0, server->router->connection);
+ }
+ } else {
+ /* Add this server to be our backup router */
+ silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
+ sconn->backup_replace_port, FALSE);
+ }
+
+ sock->protocol = NULL;
+
+ /* Call the completion callback to indicate that we've connected to
+ the router */
+ if (sconn->callback)
+ (*sconn->callback)(server, id_entry, sconn->callback_context);
out:
/* Free the temporary connection data context */
- if (sconn)
+ if (sconn) {
+ silc_free(sconn->remote_host);
+ silc_free(sconn->backup_replace_ip);
silc_free(sconn);
+ }
+ if (sconn == server->router_conn)
+ server->router_conn = NULL;
/* Free the protocol object */
+ if (sock->protocol == protocol)
+ sock->protocol = NULL;
silc_protocol_free(protocol);
if (ctx->packet)
silc_packet_context_free(ctx->packet);
if (ctx->ske)
silc_ske_free(ctx->ske);
+ if (ctx->auth_meth == SILC_AUTH_PASSWORD)
+ silc_free(ctx->auth_data);
silc_free(ctx);
- sock->protocol = NULL;
}
-/* Accepts new connections to the server. Accepting new connections are
- done in three parts to make it async. */
+/* Host lookup callbcak that is called after the incoming connection's
+ IP and FQDN lookup is performed. This will actually check the acceptance
+ of the incoming connection and will register the key exchange protocol
+ for this connection. */
-SILC_TASK_CALLBACK(silc_server_accept_new_connection)
+static void
+silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
+ void *context)
{
SilcServer server = (SilcServer)context;
- SilcSocketConnection newsocket;
SilcServerKEInternalContext *proto_ctx;
- int sock;
-
- SILC_LOG_DEBUG(("Accepting new connection"));
+ SilcServerConfigClient *cconfig = NULL;
+ SilcServerConfigServer *sconfig = NULL;
+ SilcServerConfigRouter *rconfig = NULL;
+ SilcServerConfigDeny *deny;
+ int port;
- server->stat.conn_attempts++;
+ SILC_LOG_DEBUG(("Start"));
- sock = silc_net_accept_connection(server->sock);
- if (sock < 0) {
- SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
+ /* Check whether we could resolve both IP and FQDN. */
+ if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
+ server->config->require_reverse_lookup)) {
+ SILC_LOG_ERROR(("IP/DNS lookup failed %s",
+ sock->hostname ? sock->hostname :
+ sock->ip ? sock->ip : ""));
server->stat.conn_failures++;
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: Unknown host");
return;
}
- /* Check max connections */
- if (sock > SILC_SERVER_MAX_CONNECTIONS) {
- if (server->config->redirect) {
- /* XXX Redirecting connection to somewhere else now?? */
- /*silc_server_send_notify("Server is full, trying to redirect..."); */
- } else {
- SILC_LOG_ERROR(("Refusing connection, server is full"));
- server->stat.conn_failures++;
- }
+ /* Register the connection for network input and output. This sets
+ that scheduler will listen for incoming packets for this connection
+ and sets that outgoing packets may be sent to this connection as well.
+ However, this doesn't set the scheduler for outgoing traffic, it
+ will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
+ later when outgoing data is available. */
+ SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
+
+ SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
+ sock->ip));
+
+ port = server->sockets[server->sock]->port; /* Listenning port */
+
+ /* Check whether this connection is denied to connect to us. */
+ deny = silc_server_config_find_denied(server, sock->ip);
+ if (!deny)
+ deny = silc_server_config_find_denied(server, sock->hostname);
+ if (deny) {
+ /* The connection is denied */
+ SILC_LOG_INFO(("Connection %s (%s) is denied",
+ sock->hostname, sock->ip));
+ silc_server_disconnect_remote(server, sock, deny->reason ?
+ deny->reason :
+ "Server closed connection: "
+ "Connection refused");
+ server->stat.conn_failures++;
return;
}
- /* Set socket options */
- silc_net_set_socket_nonblock(sock);
- silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
-
- /* We don't create a ID yet, since we don't know what type of connection
- this is yet. But, we do add the connection to the socket table. */
- silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
- server->sockets[sock] = newsocket;
-
- /* XXX This MUST be done async as this will block the entire server
- process. Either we have to do our own resolver stuff or in the future
- we can use threads. */
- /* Perform name and address lookups for the remote host. */
- silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
- if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
- !newsocket->ip) {
- SILC_LOG_ERROR(("IP/DNS lookup failed"));
+ /* Check whether we have configred this sort of connection at all. We
+ have to check all configurations since we don't know what type of
+ connection this is. */
+ if (!(cconfig = silc_server_config_find_client(server, sock->ip)))
+ cconfig = silc_server_config_find_client(server, sock->hostname);
+ if (!(sconfig = silc_server_config_find_server_conn(server, sock->ip)))
+ sconfig = silc_server_config_find_server_conn(server, sock->hostname);
+ if (server->server_type == SILC_ROUTER) {
+ if (!(rconfig = silc_server_config_find_router_conn(server,
+ sock->ip, port)))
+ rconfig = silc_server_config_find_router_conn(server, sock->hostname,
+ sock->port);
+ }
+ if (!cconfig && !sconfig && !rconfig) {
+ SILC_LOG_INFO(("Connection %s (%s) is not allowed", sock->hostname,
+ sock->ip));
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Connection refused");
server->stat.conn_failures++;
return;
}
- if (!newsocket->hostname)
- newsocket->hostname = strdup(newsocket->ip);
- SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
- newsocket->ip));
+ /* The connection is allowed */
/* Allocate internal context for key exchange protocol. This is
sent as context for the protocol. */
proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
proto_ctx->server = context;
- proto_ctx->sock = newsocket;
+ proto_ctx->sock = sock;
proto_ctx->rng = server->rng;
proto_ctx->responder = TRUE;
+ proto_ctx->cconfig = cconfig;
+ proto_ctx->sconfig = sconfig;
+ proto_ctx->rconfig = rconfig;
+
+ /* Take flags for key exchange. Since we do not know what type of connection
+ this is, we go through all found configuratios and use the global ones
+ as well. This will result always into strictest key exchange flags. */
+ SILC_GET_SKE_FLAGS(cconfig, proto_ctx);
+ SILC_GET_SKE_FLAGS(sconfig, proto_ctx);
+ SILC_GET_SKE_FLAGS(rconfig, proto_ctx);
+ if (server->config->param.key_exchange_pfs)
+ proto_ctx->flags |= SILC_SKE_SP_FLAG_PFS;
/* Prepare the connection for key exchange protocol. We allocate the
protocol but will not start it yet. The connector will be the
there before we start the protocol. */
server->stat.auth_attempts++;
silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
- &newsocket->protocol, proto_ctx,
+ &sock->protocol, proto_ctx,
silc_server_accept_new_connection_second);
/* Register a timeout task that will be executed if the connector
- will not start the key exchange protocol within 60 seconds. For
- now, this is a hard coded limit. After 60 secs the connection will
- be closed if the key exchange protocol has not been started. */
+ will not start the key exchange protocol within specified timeout
+ and the connection will be closed. */
proto_ctx->timeout_task =
- silc_task_register(server->timeout_queue, newsocket->sock,
- silc_server_timeout_remote,
- context, 60, 0,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_LOW);
+ silc_schedule_task_add(server->schedule, sock->sock,
+ silc_server_timeout_remote,
+ context, server->config->key_exchange_timeout, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_LOW);
+}
- /* Register the connection for network input and output. This sets
- that scheduler will listen for incoming packets for this connection
- and sets that outgoing packets may be sent to this connection as well.
- However, this doesn't set the scheduler for outgoing traffic, it
- will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
- later when outgoing data is available. */
- SILC_REGISTER_CONNECTION_FOR_IO(sock);
+/* Accepts new connections to the server. Accepting new connections are
+ done in three parts to make it async. */
+
+SILC_TASK_CALLBACK(silc_server_accept_new_connection)
+{
+ SilcServer server = (SilcServer)context;
+ SilcSocketConnection newsocket;
+ int sock;
+
+ SILC_LOG_DEBUG(("Accepting new connection"));
+
+ server->stat.conn_attempts++;
+
+ sock = silc_net_accept_connection(server->sock);
+ if (sock < 0) {
+ SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
+ server->stat.conn_failures++;
+ return;
+ }
+
+ /* Check for maximum allowed connections */
+ if (sock > server->config->param.connections_max) {
+ SILC_LOG_ERROR(("Refusing connection, server is full, try again later"));
+ server->stat.conn_failures++;
+ return;
+ }
+
+ /* Set socket options */
+ silc_net_set_socket_nonblock(sock);
+ silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
+
+ /* We don't create a ID yet, since we don't know what type of connection
+ this is yet. But, we do add the connection to the socket table. */
+ silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
+ server->sockets[sock] = newsocket;
+
+ /* Perform asynchronous host lookup. This will lookup the IP and the
+ FQDN of the remote connection. After the lookup is done the connection
+ is accepted further. */
+ silc_socket_host_lookup(newsocket, TRUE,
+ silc_server_accept_new_connection_lookup, context,
+ server->schedule);
}
/* Second part of accepting new connection. Key exchange protocol has been
SilcServerKEInternalContext *ctx =
(SilcServerKEInternalContext *)protocol->context;
SilcServer server = (SilcServer)ctx->server;
- SilcSocketConnection sock = NULL;
+ SilcSocketConnection sock = ctx->sock;
SilcServerConnAuthInternalContext *proto_ctx;
SILC_LOG_DEBUG(("Start"));
- if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
+ if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
+ protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
/* Error occured during protocol */
silc_protocol_free(protocol);
+ sock->protocol = NULL;
+ silc_ske_free_key_material(ctx->keymat);
if (ctx->packet)
silc_packet_context_free(ctx->packet);
if (ctx->ske)
silc_ske_free(ctx->ske);
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
+ silc_free(ctx->dest_id);
silc_free(ctx);
- if (sock)
- sock->protocol = NULL;
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_failure_callback);
silc_server_disconnect_remote(server, sock, "Server closed connection: "
"Key exchange failed");
server->stat.auth_failures++;
return;
}
+ /* We now have the key material as the result of the key exchange
+ protocol. Take the key material into use. Free the raw key material
+ as soon as we've set them into use. */
+ if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
+ ctx->sock, ctx->keymat,
+ ctx->ske->prop->cipher,
+ ctx->ske->prop->pkcs,
+ ctx->ske->prop->hash,
+ ctx->ske->prop->hmac,
+ ctx->ske->prop->group,
+ ctx->responder)) {
+ silc_protocol_free(protocol);
+ sock->protocol = NULL;
+ silc_ske_free_key_material(ctx->keymat);
+ if (ctx->packet)
+ silc_packet_context_free(ctx->packet);
+ if (ctx->ske)
+ silc_ske_free(ctx->ske);
+ silc_free(ctx->dest_id);
+ silc_free(ctx);
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_failure_callback);
+ silc_server_disconnect_remote(server, sock, "Server closed connection: "
+ "Key exchange failed");
+ server->stat.auth_failures++;
+ return;
+ }
+ silc_ske_free_key_material(ctx->keymat);
+
/* Allocate internal context for the authentication protocol. This
is sent as context for the protocol. */
proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
proto_ctx->server = (void *)server;
- proto_ctx->sock = sock = server->sockets[fd];
+ proto_ctx->sock = sock;
proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
proto_ctx->responder = TRUE;
proto_ctx->dest_id_type = ctx->dest_id_type;
proto_ctx->dest_id = ctx->dest_id;
+ proto_ctx->cconfig = ctx->cconfig;
+ proto_ctx->sconfig = ctx->sconfig;
+ proto_ctx->rconfig = ctx->rconfig;
/* Free old protocol as it is finished now */
silc_protocol_free(protocol);
silc_server_accept_new_connection_final);
/* Register timeout task. If the protocol is not executed inside
- this timelimit the connection will be terminated. Currently
- this is 60 seconds and is hard coded limit (XXX). */
+ this timelimit the connection will be terminated. */
proto_ctx->timeout_task =
- silc_task_register(server->timeout_queue, sock->sock,
- silc_server_timeout_remote,
- (void *)server, 60, 0,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_LOW);
+ silc_schedule_task_add(server->schedule, sock->sock,
+ silc_server_timeout_remote,
+ (void *)server,
+ server->config->conn_auth_timeout, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_LOW);
}
/* Final part of accepting new connection. The connection has now
SilcServer server = (SilcServer)ctx->server;
SilcSocketConnection sock = ctx->sock;
SilcServerHBContext hb_context;
- void *id_entry = NULL;
+ SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
+ void *id_entry;
+ uint32 hearbeat_timeout = server->config->param.keepalive_secs;
+ uint32 num_sockets;
SILC_LOG_DEBUG(("Start"));
- if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
+ if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
+ protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
/* Error occured during protocol */
silc_protocol_free(protocol);
+ sock->protocol = NULL;
if (ctx->packet)
silc_packet_context_free(ctx->packet);
if (ctx->ske)
silc_ske_free(ctx->ske);
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
+ silc_free(ctx->dest_id);
silc_free(ctx);
- if (sock)
- sock->protocol = NULL;
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_failure_callback);
silc_server_disconnect_remote(server, sock, "Server closed connection: "
"Authentication failed");
server->stat.auth_failures++;
return;
}
- sock->type = ctx->conn_type;
- switch(sock->type) {
+ entry->data.last_receive = time(NULL);
+
+ num_sockets = silc_server_num_sockets_by_ip(server, sock->ip);
+
+ switch (ctx->conn_type) {
case SILC_SOCKET_TYPE_CLIENT:
{
SilcClientEntry client;
+ SilcServerConfigClient *conn = ctx->cconfig;
+ uint32 max_per_host = server->config->param.connections_max_per_host;
+
+ /* Check for maximum connections limit */
+ if (conn->param) {
+ if (conn->param->connections_max &&
+ server->stat.my_clients >= conn->param->connections_max) {
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Server is full, try again later");
+ server->stat.auth_failures++;
+ goto out;
+ }
+
+ max_per_host = conn->param->connections_max_per_host;
+ }
+
+ if (num_sockets > max_per_host) {
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Too many connections from your host");
+ server->stat.auth_failures++;
+ goto out;
+ }
SILC_LOG_DEBUG(("Remote host is client"));
SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
and other information is created after we have received NEW_CLIENT
packet from client. */
client = silc_idlist_add_client(server->local_list,
- NULL, NULL, NULL, NULL, NULL, sock);
+ NULL, NULL, NULL, NULL, NULL, sock, 0);
if (!client) {
SILC_LOG_ERROR(("Could not add new client to cache"));
silc_free(sock->user_data);
- break;
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Authentication failed");
+ server->stat.auth_failures++;
+ goto out;
}
/* Statistics */
if (server->server_type == SILC_ROUTER)
server->stat.cell_clients++;
+ /* Get connection parameters */
+ if (conn->param) {
+ if (conn->param->keepalive_secs)
+ hearbeat_timeout = conn->param->keepalive_secs;
+ }
+
id_entry = (void *)client;
break;
}
case SILC_SOCKET_TYPE_ROUTER:
{
SilcServerEntry new_server;
+ bool initiator = FALSE;
+ bool backup_local = FALSE;
+ bool backup_router = FALSE;
+ char *backup_replace_ip = NULL;
+ uint16 backup_replace_port = 0;
+ SilcServerConfigServer *sconn = ctx->sconfig;
+ SilcServerConfigRouter *rconn = ctx->rconfig;
+ uint32 max_per_host = server->config->param.connections_max_per_host;
+
+ if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && rconn) {
+ if (rconn->param) {
+ /* Check for maximum connections limit */
+ if (rconn->param->connections_max &&
+ server->stat.my_routers >= rconn->param->connections_max) {
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Server is full, try again later");
+ server->stat.auth_failures++;
+ goto out;
+ }
+ max_per_host = rconn->param->connections_max_per_host;
+
+ if (rconn->param->keepalive_secs)
+ hearbeat_timeout = rconn->param->keepalive_secs;
+ }
+
+ initiator = rconn->initiator;
+ backup_local = rconn->backup_local;
+ backup_router = rconn->backup_router;
+ backup_replace_ip = rconn->backup_replace_ip;
+ backup_replace_port = rconn->backup_replace_port;
+ }
+
+ if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER && sconn) {
+ if (sconn->param) {
+ /* Check for maximum connections limit */
+ if (sconn->param->connections_max &&
+ server->stat.my_servers >= sconn->param->connections_max) {
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Server is full, try again later");
+ server->stat.auth_failures++;
+ goto out;
+ }
+ max_per_host = sconn->param->connections_max_per_host;
+
+ if (sconn->param->keepalive_secs)
+ hearbeat_timeout = sconn->param->keepalive_secs;
+ }
+
+ backup_router = sconn->backup_router;
+ }
+
+ if (num_sockets > max_per_host) {
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Too many connections from your host");
+ server->stat.auth_failures++;
+ goto out;
+ }
SILC_LOG_DEBUG(("Remote host is %s",
- sock->type == SILC_SOCKET_TYPE_SERVER ?
- "server" : "router"));
+ ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
+ "server" : (backup_router ?
+ "backup router" : "router")));
SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
- sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
- "server" : "router"));
+ sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
+ "server" : (backup_router ?
+ "backup router" : "router")));
/* Add the server into server cache. The server name and Server ID
is updated after we have received NEW_SERVER packet from the
server. We mark ourselves as router for this server if we really
are router. */
new_server =
- silc_idlist_add_server(server->local_list, NULL,
- sock->type == SILC_SOCKET_TYPE_SERVER ?
- SILC_SERVER : SILC_ROUTER, NULL,
- sock->type == SILC_SOCKET_TYPE_SERVER ?
- server->id_entry : NULL, sock);
+ silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
+ server->local_list : (backup_router ?
+ server->local_list :
+ server->global_list)),
+ NULL,
+ (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
+ SILC_SERVER : SILC_ROUTER),
+ NULL,
+ (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
+ server->id_entry : (backup_router ?
+ server->id_entry : NULL)),
+ sock);
if (!new_server) {
SILC_LOG_ERROR(("Could not add new server to cache"));
silc_free(sock->user_data);
- break;
+ silc_server_disconnect_remote(server, sock,
+ "Server closed connection: "
+ "Authentication failed");
+ server->stat.auth_failures++;
+ goto out;
}
/* Statistics */
- if (sock->type == SILC_SOCKET_TYPE_SERVER)
+ if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
server->stat.my_servers++;
else
server->stat.my_routers++;
server->stat.servers++;
id_entry = (void *)new_server;
-
- /* There is connection to other server now, if it is router then
- we will have connection to outside world. If we are router but
- normal server connected to us then we will remain standalone,
- if we are standlone. */
- if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
+
+ /* If the incoming connection is router and marked as backup router
+ then add it to be one of our backups */
+ if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && backup_router) {
+ silc_server_backup_add(server, new_server, backup_replace_ip,
+ backup_replace_port, backup_local);
+
+ /* Change it back to SERVER type since that's what it really is. */
+ if (backup_local)
+ ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
+
+ new_server->server_type = SILC_BACKUP_ROUTER;
+ }
+
+ /* Check whether this connection is to be our primary router connection
+ if we do not already have the primary route. */
+ if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
+ if (silc_server_config_is_primary_route(server) && !initiator)
+ break;
+
SILC_LOG_DEBUG(("We are not standalone server anymore"));
server->standalone = FALSE;
if (!server->id_entry->router) {
server->router = id_entry;
}
}
+
break;
}
default:
+ goto out;
break;
}
+ sock->type = ctx->conn_type;
+
/* Add the common data structure to the ID entry. */
- if (id_entry)
- silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
-
+ silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
+
/* Add to sockets internal pointer for fast referencing */
silc_free(sock->user_data);
sock->user_data = id_entry;
SILC_LOG_DEBUG(("New connection authenticated"));
/* Perform keepalive. The `hb_context' will be freed automatically
- when finally calling the silc_socket_free function. XXX hardcoded
- timeout!! */
+ when finally calling the silc_socket_free function. */
hb_context = silc_calloc(1, sizeof(*hb_context));
hb_context->server = server;
- silc_socket_set_heartbeat(sock, 600, hb_context,
+ silc_socket_set_heartbeat(sock, hearbeat_timeout, hb_context,
silc_server_perform_heartbeat,
- server->timeout_queue);
+ server->schedule);
+ out:
+ silc_schedule_task_del_by_callback(server->schedule,
+ silc_server_failure_callback);
silc_protocol_free(protocol);
if (ctx->packet)
silc_packet_context_free(ctx->packet);
if (ctx->ske)
silc_ske_free(ctx->ske);
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
+ silc_free(ctx->dest_id);
silc_free(ctx);
sock->protocol = NULL;
}
SilcIDListData idata;
SilcCipher cipher = NULL;
SilcHmac hmac = NULL;
+ uint32 sequence = 0;
int ret;
if (!sock)
/* Packet sending */
if (type == SILC_TASK_WRITE) {
+ /* Do not send data to disconnected connection */
+ if (SILC_IS_DISCONNECTED(sock))
+ return;
+
server->stat.packets_sent++;
if (sock->outbuf->data - sock->outbuf->head)
- silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
+ silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
- ret = silc_server_packet_send_real(server, sock, TRUE);
+ /* Send the packet */
+ ret = silc_packet_send(sock, TRUE);
/* If returned -2 could not write to connection now, will do
it later. */
if (ret == -2)
return;
- if (ret == -1)
+ if (ret == -1) {
+ SILC_LOG_ERROR(("Error sending packet to connection "
+ "%s:%d [%s]", sock->hostname, sock->port,
+ (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
+ sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
+ sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
+ "Router")));
return;
+ }
/* The packet has been sent and now it is time to set the connection
back to only for input. When there is again some outgoing data
available for this connection it will be set for output as well.
This call clears the output setting and sets it only for input. */
- SILC_SET_CONNECTION_FOR_INPUT(fd);
+ SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
SILC_UNSET_OUTBUF_PENDING(sock);
silc_buffer_clear(sock->outbuf);
/* Read some data from connection */
ret = silc_packet_receive(sock);
- if (ret < 0)
+ if (ret < 0) {
+
+ if (ret == -1)
+ SILC_LOG_ERROR(("Error receiving packet from connection "
+ "%s:%d [%s] %s", sock->hostname, sock->port,
+ (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
+ sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
+ sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
+ "Router"), strerror(errno)));
return;
-
+ }
+
/* EOF */
if (ret == 0) {
SILC_LOG_DEBUG(("Read EOF"));
close the connection */
if (SILC_IS_DISCONNECTING(sock)) {
if (sock->user_data)
- silc_server_free_sock_user_data(server, sock);
+ silc_server_free_sock_user_data(server, sock, NULL);
silc_server_close_connection(server, sock);
return;
}
SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
+ SILC_SET_DISCONNECTING(sock);
- /* If the closed connection was our primary router connection the
- start re-connecting phase. */
- if (!server->standalone && server->server_type == SILC_SERVER &&
- sock == server->router->connection)
- silc_task_register(server->timeout_queue, 0,
- silc_server_connect_to_router,
- context, 0, 500000,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_NORMAL);
+ if (sock->user_data) {
+ char tmp[128];
+ if (silc_socket_get_error(sock, tmp, sizeof(tmp) - 1))
+ silc_server_free_sock_user_data(server, sock, tmp);
+ else
+ silc_server_free_sock_user_data(server, sock, NULL);
+ } else if (server->router_conn && server->router_conn->sock == sock &&
+ !server->router && server->standalone)
+ silc_schedule_task_add(server->schedule, 0,
+ silc_server_connect_to_router,
+ server, 1, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
- if (sock->user_data)
- silc_server_free_sock_user_data(server, sock);
silc_server_close_connection(server, sock);
return;
}
/* If connection is disconnecting or disconnected we will ignore
what we read. */
if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
- SILC_LOG_DEBUG(("Ignoring read data from invalid connection"));
+ SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
return;
}
/* Get keys and stuff from ID entry */
idata = (SilcIDListData)sock->user_data;
if (idata) {
- idata->last_receive = time(NULL);
cipher = idata->receive_key;
- hmac = idata->hmac;
+ hmac = idata->hmac_receive;
+ sequence = idata->psn_receive;
}
/* Process the packet. This will call the parser that will then
decrypt and parse the packet. */
- silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
- server);
-}
+ ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
+ TRUE : FALSE, cipher, hmac, sequence,
+ silc_server_packet_parse, server);
+
+ /* If this socket connection is not authenticated yet and the packet
+ processing failed we will drop the connection since it can be
+ a malicious flooder. */
+ if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
+ (!sock->protocol || sock->protocol->protocol->type ==
+ SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
+ SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
+ SILC_SET_DISCONNECTING(sock);
+ if (sock->user_data)
+ silc_server_free_sock_user_data(server, sock, NULL);
+ silc_server_close_connection(server, sock);
+ }
+}
+
/* Parses whole packet, received earlier. */
SILC_TASK_CALLBACK(silc_server_packet_parse_real)
SilcServer server = (SilcServer)parse_ctx->context;
SilcSocketConnection sock = parse_ctx->sock;
SilcPacketContext *packet = parse_ctx->packet;
+ SilcIDListData idata = (SilcIDListData)sock->user_data;
int ret;
SILC_LOG_DEBUG(("Start"));
- /* Decrypt the received packet */
- ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
- packet->buffer, packet);
- if (ret < 0)
- goto out;
+ /* Parse the packet */
+ if (parse_ctx->normal)
+ ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
+ else
+ ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
- if (ret == 0) {
- /* Parse the packet. Packet type is returned. */
- ret = silc_packet_parse(packet);
- } else {
- /* Parse the packet header in special way as this is "special"
- packet type. */
- ret = silc_packet_parse_special(packet);
+ /* If entry is disabled ignore what we got. */
+ if (ret != SILC_PACKET_RESUME_ROUTER &&
+ idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
+ SILC_LOG_DEBUG(("Connection is disabled"));
+ goto out;
}
if (ret == SILC_PACKET_NONE)
goto out;
+ /* Check that the the current client ID is same as in the client's packet. */
+ if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
+ SilcClientEntry client = (SilcClientEntry)sock->user_data;
+ if (client && client->id) {
+ void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
+ packet->src_id_type);
+ if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
+ silc_free(id);
+ goto out;
+ }
+ silc_free(id);
+ }
+ }
+
if (server->server_type == SILC_ROUTER) {
/* Route the packet if it is not destined to us. Other ID types but
server are handled separately after processing them. */
- if (packet->dst_id_type == SILC_ID_SERVER &&
+ if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
+ packet->dst_id_type == SILC_ID_SERVER &&
sock->type != SILC_SOCKET_TYPE_CLIENT &&
- SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
+ memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
/* Route the packet to fastest route for the destination ID */
void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
silc_free(id);
goto out;
}
-
+ }
+
+ /* Parse the incoming packet type */
+ silc_server_packet_parse_type(server, sock, packet);
+
+ if (server->server_type == SILC_ROUTER) {
/* Broadcast packet if it is marked as broadcast packet and it is
originated from router and we are router. */
if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
- packet->flags & SILC_PACKET_FLAG_BROADCAST) {
+ packet->flags & SILC_PACKET_FLAG_BROADCAST &&
+ !server->standalone) {
+ /* Broadcast to our primary route */
silc_server_packet_broadcast(server, server->router->connection, packet);
+
+ /* If we have backup routers then we need to feed all broadcast
+ data to those servers. */
+ silc_server_backup_broadcast(server, sock, packet);
}
}
- /* Parse the incoming packet type */
- silc_server_packet_parse_type(server, sock, packet);
-
out:
- silc_buffer_clear(sock->inbuf);
silc_packet_context_free(packet);
silc_free(parse_ctx);
}
/* Parser callback called by silc_packet_receive_process. This merely
registers timeout that will handle the actual parsing when appropriate. */
-void silc_server_packet_parse(SilcPacketParserContext *parser_context)
+bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
+ void *context)
{
- SilcServer server = (SilcServer)parser_context->context;
+ SilcServer server = (SilcServer)context;
SilcSocketConnection sock = parser_context->sock;
+ SilcIDListData idata = (SilcIDListData)sock->user_data;
+
+ if (idata)
+ idata->psn_receive = parser_context->packet->sequence + 1;
+
+ /* If protocol for this connection is key exchange or rekey then we'll
+ process all packets synchronously, since there might be packets in
+ queue that we are not able to decrypt without first processing the
+ packets before them. */
+ if ((parser_context->packet->type == SILC_PACKET_REKEY ||
+ parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
+ (sock->protocol && sock->protocol->protocol &&
+ (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
+ sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
+ silc_server_packet_parse_real(server->schedule, 0, sock->sock,
+ parser_context);
+
+ /* Reprocess data since we'll return FALSE here. This is because
+ the idata->receive_key might have become valid in the last packet
+ and we want to call this processor with valid cipher. */
+ if (idata)
+ silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
+ TRUE : FALSE, idata->receive_key,
+ idata->hmac_receive, idata->psn_receive,
+ silc_server_packet_parse, server);
+ else
+ silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
+ TRUE : FALSE, NULL, NULL, 0,
+ silc_server_packet_parse, server);
+ return FALSE;
+ }
switch (sock->type) {
- case SILC_SOCKET_TYPE_CLIENT:
case SILC_SOCKET_TYPE_UNKNOWN:
+ case SILC_SOCKET_TYPE_CLIENT:
/* Parse the packet with timeout */
- silc_task_register(server->timeout_queue, sock->sock,
- silc_server_packet_parse_real,
- (void *)parser_context, 0, 100000,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_NORMAL);
+ silc_schedule_task_add(server->schedule, sock->sock,
+ silc_server_packet_parse_real,
+ (void *)parser_context, 0, 100000,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
break;
case SILC_SOCKET_TYPE_SERVER:
case SILC_SOCKET_TYPE_ROUTER:
- /* Packets from servers are parsed as soon as possible */
- silc_task_register(server->timeout_queue, sock->sock,
- silc_server_packet_parse_real,
- (void *)parser_context, 0, 1,
- SILC_TASK_TIMEOUT,
- SILC_TASK_PRI_NORMAL);
+ /* Packets from servers are parsed immediately */
+ silc_server_packet_parse_real(server->schedule, 0, sock->sock,
+ parser_context);
break;
default:
- return;
+ return TRUE;
}
+
+ return TRUE;
}
/* Parses the packet type and calls what ever routines the packet type
SilcPacketContext *packet)
{
SilcPacketType type = packet->type;
+ SilcIDListData idata = (SilcIDListData)sock->user_data;
SILC_LOG_DEBUG(("Parsing packet type %d", type));
/* Parse the packet type */
- switch(type) {
+ switch (type) {
case SILC_PACKET_DISCONNECT:
SILC_LOG_DEBUG(("Disconnect packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
break;
case SILC_PACKET_SUCCESS:
* success message is for whatever protocol is executing currently.
*/
SILC_LOG_DEBUG(("Success packet"));
- if (sock->protocol) {
- sock->protocol->execute(server->timeout_queue, 0,
- sock->protocol, sock->sock, 0, 0);
- }
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ if (sock->protocol)
+ silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
break;
case SILC_PACKET_FAILURE:
* failure message is for whatever protocol is executing currently.
*/
SILC_LOG_DEBUG(("Failure packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
if (sock->protocol) {
- /* XXX Audit the failure type */
- sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
- sock->protocol->execute(server->timeout_queue, 0,
- sock->protocol, sock->sock, 0, 0);
+ SilcServerFailureContext f;
+ f = silc_calloc(1, sizeof(*f));
+ f->server = server;
+ f->sock = sock;
+
+ /* We will wait 5 seconds to process this failure packet */
+ silc_schedule_task_add(server->schedule, sock->sock,
+ silc_server_failure_callback, (void *)f, 5, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
}
break;
case SILC_PACKET_REJECT:
SILC_LOG_DEBUG(("Reject packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
return;
break;
* router. Server then relays the notify messages to clients if needed.
*/
SILC_LOG_DEBUG(("Notify packet"));
- silc_server_notify(server, sock, packet);
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ silc_server_notify_list(server, sock, packet);
+ else
+ silc_server_notify(server, sock, packet);
break;
/*
* specially.
*/
SILC_LOG_DEBUG(("Channel Message packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ idata->last_receive = time(NULL);
silc_server_channel_message(server, sock, packet);
break;
* never receives this channel and thus is ignored.
*/
SILC_LOG_DEBUG(("Channel Key packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
silc_server_channel_key(server, sock, packet);
break;
* command context and calls the command.
*/
SILC_LOG_DEBUG(("Command packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
silc_server_command_process(server, sock, packet);
break;
* that we've routed further.
*/
SILC_LOG_DEBUG(("Command Reply packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
silc_server_command_reply(server, sock, packet);
break;
* client or server.
*/
SILC_LOG_DEBUG(("Private Message packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ idata->last_receive = time(NULL);
silc_server_private_message(server, sock, packet);
break;
/*
* Private message key packet.
*/
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ silc_server_private_message_key(server, sock, packet);
break;
/*
*/
case SILC_PACKET_KEY_EXCHANGE:
SILC_LOG_DEBUG(("KE packet"));
- if (sock->protocol && sock->protocol->protocol->type
- == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+
+ if (sock->protocol && sock->protocol->protocol &&
+ sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
SilcServerKEInternalContext *proto_ctx =
(SilcServerKEInternalContext *)sock->protocol->context;
proto_ctx->packet = silc_packet_context_dup(packet);
/* Let the protocol handle the packet */
- sock->protocol->execute(server->timeout_queue, 0,
- sock->protocol, sock->sock, 0, 100000);
+ silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
} else {
SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
"protocol active, packet dropped."));
-
- /* XXX Trigger KE protocol?? Rekey actually, maybe. */
}
break;
case SILC_PACKET_KEY_EXCHANGE_1:
SILC_LOG_DEBUG(("KE 1 packet"));
- if (sock->protocol && sock->protocol->protocol->type
- == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
-
- SilcServerKEInternalContext *proto_ctx =
- (SilcServerKEInternalContext *)sock->protocol->context;
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
- if (proto_ctx->packet)
- silc_packet_context_free(proto_ctx->packet);
+ if (sock->protocol && sock->protocol->protocol &&
+ (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
+ sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
- proto_ctx->packet = silc_packet_context_dup(packet);
- proto_ctx->dest_id_type = packet->src_id_type;
- proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
- packet->src_id_type);
- if (!proto_ctx->dest_id)
- break;
+ if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
+ SilcServerRekeyInternalContext *proto_ctx =
+ (SilcServerRekeyInternalContext *)sock->protocol->context;
+
+ if (proto_ctx->packet)
+ silc_packet_context_free(proto_ctx->packet);
+
+ proto_ctx->packet = silc_packet_context_dup(packet);
- /* Let the protocol handle the packet */
- sock->protocol->execute(server->timeout_queue, 0,
- sock->protocol, sock->sock,
+ /* Let the protocol handle the packet */
+ silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
+ } else {
+ SilcServerKEInternalContext *proto_ctx =
+ (SilcServerKEInternalContext *)sock->protocol->context;
+
+ if (proto_ctx->packet)
+ silc_packet_context_free(proto_ctx->packet);
+
+ proto_ctx->packet = silc_packet_context_dup(packet);
+ proto_ctx->dest_id_type = packet->src_id_type;
+ proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
+ packet->src_id_type);
+ if (!proto_ctx->dest_id)
+ break;
+
+ /* Let the protocol handle the packet */
+ silc_protocol_execute(sock->protocol, server->schedule,
0, 100000);
+ }
} else {
SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
"protocol active, packet dropped."));
case SILC_PACKET_KEY_EXCHANGE_2:
SILC_LOG_DEBUG(("KE 2 packet"));
- if (sock->protocol && sock->protocol->protocol->type
- == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
- SilcServerKEInternalContext *proto_ctx =
- (SilcServerKEInternalContext *)sock->protocol->context;
+ if (sock->protocol && sock->protocol->protocol &&
+ (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
+ sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
- if (proto_ctx->packet)
- silc_packet_context_free(proto_ctx->packet);
+ if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
+ SilcServerRekeyInternalContext *proto_ctx =
+ (SilcServerRekeyInternalContext *)sock->protocol->context;
+
+ if (proto_ctx->packet)
+ silc_packet_context_free(proto_ctx->packet);
+
+ proto_ctx->packet = silc_packet_context_dup(packet);
- proto_ctx->packet = silc_packet_context_dup(packet);
- proto_ctx->dest_id_type = packet->src_id_type;
- proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
- packet->src_id_type);
- if (!proto_ctx->dest_id)
- break;
+ /* Let the protocol handle the packet */
+ silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
+ } else {
+ SilcServerKEInternalContext *proto_ctx =
+ (SilcServerKEInternalContext *)sock->protocol->context;
+
+ if (proto_ctx->packet)
+ silc_packet_context_free(proto_ctx->packet);
+
+ proto_ctx->packet = silc_packet_context_dup(packet);
+ proto_ctx->dest_id_type = packet->src_id_type;
+ proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
+ packet->src_id_type);
+ if (!proto_ctx->dest_id)
+ break;
- /* Let the protocol handle the packet */
- sock->protocol->execute(server->timeout_queue, 0,
- sock->protocol, sock->sock,
+ /* Let the protocol handle the packet */
+ silc_protocol_execute(sock->protocol, server->schedule,
0, 100000);
+ }
} else {
SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
"protocol active, packet dropped."));
* at any time.
*/
SILC_LOG_DEBUG(("Connection authentication request packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ silc_server_connection_auth_request(server, sock, packet);
break;
/*
/* Start of the authentication protocol. We receive here the
authentication data and will verify it. */
SILC_LOG_DEBUG(("Connection auth packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+
if (sock->protocol && sock->protocol->protocol->type
== SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
proto_ctx->packet = silc_packet_context_dup(packet);
/* Let the protocol handle the packet */
- sock->protocol->execute(server->timeout_queue, 0,
- sock->protocol, sock->sock, 0, 0);
+ silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
} else {
SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
"protocol active, packet dropped."));
* SILC network.
*/
SILC_LOG_DEBUG(("New ID packet"));
- silc_server_new_id(server, sock, packet);
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ silc_server_new_id_list(server, sock, packet);
+ else
+ silc_server_new_id(server, sock, packet);
break;
case SILC_PACKET_NEW_CLIENT:
* ID we will send it to the client.
*/
SILC_LOG_DEBUG(("New Client packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
silc_server_new_client(server, sock, packet);
break;
* connected to us.
*/
SILC_LOG_DEBUG(("New Server packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
silc_server_new_server(server, sock, packet);
break;
* network are distributed using this packet.
*/
SILC_LOG_DEBUG(("New Channel packet"));
- silc_server_new_channel(server, sock, packet);
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ silc_server_new_channel_list(server, sock, packet);
+ else
+ silc_server_new_channel(server, sock, packet);
break;
- case SILC_PACKET_NEW_CHANNEL_USER:
+ case SILC_PACKET_HEARTBEAT:
/*
- * Received new channel user packet. Information about new users on a
- * channel are distributed between routers using this packet. The
- * router receiving this will redistribute it and also sent JOIN notify
- * to local clients on the same channel. Normal server sends JOIN notify
- * to its local clients on the channel.
+ * Received heartbeat.
*/
- SILC_LOG_DEBUG(("New Channel User packet"));
- silc_server_new_channel_user(server, sock, packet);
+ SILC_LOG_DEBUG(("Heartbeat packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
break;
- case SILC_PACKET_NEW_CHANNEL_LIST:
+ case SILC_PACKET_KEY_AGREEMENT:
/*
- * List of new channel packets received. This is usually received when
- * existing server or router connects to us and distributes information
- * of all channels it has.
+ * Received heartbeat.
*/
+ SILC_LOG_DEBUG(("Key agreement packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ silc_server_key_agreement(server, sock, packet);
break;
- case SILC_PACKET_NEW_CHANNEL_USER_LIST:
+ case SILC_PACKET_REKEY:
/*
- * List of new channel user packets received. This is usually received
- * when existing server or router connects to us and distributes
- * information of all channel users it has.
+ * Received re-key packet. The sender wants to regenerate the session
+ * keys.
*/
+ SILC_LOG_DEBUG(("Re-key packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ silc_server_rekey(server, sock, packet);
break;
- case SILC_PACKET_REPLACE_ID:
+ case SILC_PACKET_REKEY_DONE:
/*
- * Received replace ID packet. This sends the old ID that is to be
- * replaced with the new one included into the packet. Client must not
- * send this packet.
+ * The re-key is done.
*/
- SILC_LOG_DEBUG(("Replace ID packet"));
- silc_server_replace_id(server, sock, packet);
- break;
+ SILC_LOG_DEBUG(("Re-key done packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
- case SILC_PACKET_REMOVE_ID:
- /*
- * Received remove ID Packet.
- */
- SILC_LOG_DEBUG(("Remove ID packet"));
- silc_server_remove_id(server, sock, packet);
- break;
+ if (sock->protocol && sock->protocol->protocol &&
+ sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
- case SILC_PACKET_REMOVE_CHANNEL_USER:
- /*
- * Received packet to remove user from a channel. Routers notify other
- * routers about a user leaving a channel.
- */
- SILC_LOG_DEBUG(("Remove Channel User packet"));
- silc_server_remove_channel_user(server, sock, packet);
+ SilcServerRekeyInternalContext *proto_ctx =
+ (SilcServerRekeyInternalContext *)sock->protocol->context;
+
+ if (proto_ctx->packet)
+ silc_packet_context_free(proto_ctx->packet);
+
+ proto_ctx->packet = silc_packet_context_dup(packet);
+
+ /* Let the protocol handle the packet */
+ silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
+ } else {
+ SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
+ "protocol active, packet dropped."));
+ }
break;
- case SILC_PACKET_SET_MODE:
- /*
- * Received packet to set the mode of channel or client's channel mode.
- */
- SILC_LOG_DEBUG(("Set Mode packet"));
- silc_server_set_mode(server, sock, packet);
+ case SILC_PACKET_FTP:
+ /* FTP packet */
+ SILC_LOG_DEBUG(("FTP packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ silc_server_ftp(server, sock, packet);
break;
- case SILC_PACKET_HEARTBEAT:
- /*
- * Received heartbeat.
- */
- SILC_LOG_DEBUG(("Heartbeat packet"));
+ case SILC_PACKET_RESUME_ROUTER:
+ /* Resume router packet received. This packet is received for backup
+ router resuming protocol. */
+ SILC_LOG_DEBUG(("Resume router packet"));
+ if (packet->flags & SILC_PACKET_FLAG_LIST)
+ break;
+ silc_server_backup_resume_router(server, sock, packet);
break;
default:
}
+/* Creates connection to a remote router. */
+
+void silc_server_create_connection(SilcServer server,
+ const char *remote_host, uint32 port)
+{
+ SilcServerConnection sconn;
+
+ /* Allocate connection object for hold connection specific stuff. */
+ sconn = silc_calloc(1, sizeof(*sconn));
+ sconn->server = server;
+ sconn->remote_host = strdup(remote_host);
+ sconn->remote_port = port;
+ sconn->no_reconnect = TRUE;
+ sconn->param = &server->config->param;
+
+ silc_schedule_task_add(server->schedule, 0,
+ silc_server_connect_router,
+ (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
+}
+
+SILC_TASK_CALLBACK(silc_server_close_connection_final)
+{
+ silc_socket_free((SilcSocketConnection)context);
+}
+
/* Closes connection to socket connection */
void silc_server_close_connection(SilcServer server,
SilcSocketConnection sock)
{
- SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
+ if (!server->sockets[sock->sock])
+ return;
+
+ SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
+ sock->port,
+ (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
+ sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
+ sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
+ "Router")));
/* We won't listen for this connection anymore */
- silc_schedule_unset_listen_fd(sock->sock);
+ silc_schedule_unset_listen_fd(server->schedule, sock->sock);
/* Unregister all tasks */
- silc_task_unregister_by_fd(server->io_queue, sock->sock);
- silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
+ silc_schedule_task_del_by_fd(server->schedule, sock->sock);
/* Close the actual connection */
silc_net_close_connection(sock->sock);
server->sockets[sock->sock] = NULL;
- silc_socket_free(sock);
+
+ /* If sock->user_data is NULL then we'll check for active protocols
+ here since the silc_server_free_sock_user_data has not been called
+ for this connection. */
+ if (!sock->user_data) {
+ /* If any protocol is active cancel its execution. It will call
+ the final callback which will finalize the disconnection. */
+ if (sock->protocol) {
+ silc_protocol_cancel(sock->protocol, server->schedule);
+ sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
+ silc_protocol_execute_final(sock->protocol, server->schedule);
+ sock->protocol = NULL;
+ return;
+ }
+ }
+
+ silc_schedule_task_add(server->schedule, 0,
+ silc_server_close_connection_final,
+ (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
}
/* Sends disconnect message to remote connection and disconnects the
silc_server_close_connection(server, sock);
}
-/* Free's user_data pointer from socket connection object. This also sends
+typedef struct {
+ SilcServer server;
+ SilcClientEntry client;
+} *FreeClientInternal;
+
+SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
+{
+ FreeClientInternal i = (FreeClientInternal)context;
+
+ silc_idlist_del_data(i->client);
+ silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
+ silc_free(i);
+}
+
+/* Frees client data and notifies about client's signoff. */
+
+void silc_server_free_client_data(SilcServer server,
+ SilcSocketConnection sock,
+ SilcClientEntry client,
+ int notify,
+ const char *signoff)
+{
+ FreeClientInternal i = silc_calloc(1, sizeof(*i));
+
+ /* If there is pending outgoing data for the client then purge it
+ to the network before removing the client entry. */
+ silc_server_packet_queue_purge(server, sock);
+
+ if (!client->id)
+ return;
+
+ /* Send SIGNOFF notify to routers. */
+ if (notify && !server->standalone && server->router)
+ silc_server_send_notify_signoff(server, server->router->connection,
+ server->server_type == SILC_SERVER ?
+ FALSE : TRUE, client->id, signoff);
+
+ /* Remove client from all channels */
+ if (notify)
+ silc_server_remove_from_channels(server, NULL, client,
+ TRUE, (char *)signoff, TRUE);
+ else
+ silc_server_remove_from_channels(server, NULL, client,
+ FALSE, NULL, FALSE);
+
+ /* Update statistics */
+ server->stat.my_clients--;
+ server->stat.clients--;
+ if (server->server_type == SILC_ROUTER)
+ server->stat.cell_clients--;
+ SILC_OPER_STATS_UPDATE(client, server, SILC_UMODE_SERVER_OPERATOR);
+ SILC_OPER_STATS_UPDATE(client, router, SILC_UMODE_ROUTER_OPERATOR);
+
+ /* We will not delete the client entry right away. We will take it
+ into history (for WHOWAS command) for 5 minutes */
+ i->server = server;
+ i->client = client;
+ silc_schedule_task_add(server->schedule, 0,
+ silc_server_free_client_data_timeout,
+ (void *)i, 300, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
+ client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
+ client->router = NULL;
+ client->connection = NULL;
+ client->mode = 0;
+}
+
+/* Frees user_data pointer from socket connection object. This also sends
appropriate notify packets to the network to inform about leaving
entities. */
void silc_server_free_sock_user_data(SilcServer server,
- SilcSocketConnection sock)
+ SilcSocketConnection sock,
+ const char *signoff_message)
{
SILC_LOG_DEBUG(("Start"));
- switch(sock->type) {
+ switch (sock->type) {
case SILC_SOCKET_TYPE_CLIENT:
{
SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
-
- /* Remove client from all channels */
- silc_server_remove_from_channels(server, sock, user_data);
-
- /* XXX must take some info to history before freeing */
-
- /* Send REMOVE_ID packet to routers. */
- if (!server->standalone && server->router)
- silc_server_send_remove_id(server, server->router->connection,
- server->server_type == SILC_SERVER ?
- FALSE : TRUE, user_data->id,
- SILC_ID_CLIENT_LEN, SILC_ID_CLIENT);
-
- /* Free the client entry and everything in it */
- silc_idlist_del_data(user_data);
- silc_idlist_del_client(server->local_list, user_data);
- server->stat.my_clients--;
- server->stat.clients--;
- if (server->server_type == SILC_ROUTER)
- server->stat.cell_clients--;
+ silc_server_free_client_data(server, sock, user_data, TRUE,
+ signoff_message);
break;
}
case SILC_SOCKET_TYPE_SERVER:
case SILC_SOCKET_TYPE_ROUTER:
{
SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
+ SilcServerEntry backup_router = NULL;
- /* Send REMOVE_ID packet to routers. */
- if (!server->standalone && server->router)
- silc_server_send_remove_id(server, server->router->connection,
- server->server_type == SILC_SERVER ?
- FALSE : TRUE, user_data->id,
- SILC_ID_CLIENT_LEN, SILC_ID_CLIENT);
-
- /* Then also free all client entries that this server owns as
- they will become invalid now as well. */
- silc_server_remove_clients_by_server(server, user_data);
+ if (user_data->id)
+ backup_router = silc_server_backup_get(server, user_data->id);
/* If this was our primary router connection then we're lost to
the outside world. */
- if (server->server_type == SILC_SERVER && server->router == user_data) {
- server->id_entry->router = NULL;
- server->router = NULL;
- server->standalone = TRUE;
+ if (server->router == user_data) {
+ /* Check whether we have a backup router connection */
+ if (!backup_router || backup_router == user_data) {
+ silc_schedule_task_add(server->schedule, 0,
+ silc_server_connect_to_router,
+ server, 1, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
+
+ server->id_entry->router = NULL;
+ server->router = NULL;
+ server->standalone = TRUE;
+ backup_router = NULL;
+ } else {
+ SILC_LOG_INFO(("New primary router is backup router %s",
+ backup_router->server_name));
+ SILC_LOG_DEBUG(("New primary router is backup router %s",
+ backup_router->server_name));
+ server->id_entry->router = backup_router;
+ server->router = backup_router;
+ server->router_connect = time(0);
+ server->backup_primary = TRUE;
+ if (server->server_type == SILC_BACKUP_ROUTER) {
+ server->server_type = SILC_ROUTER;
+
+ /* We'll need to constantly try to reconnect to the primary
+ router so that we'll see when it comes back online. */
+ silc_server_backup_reconnect(server, sock->ip, sock->port,
+ silc_server_backup_connected,
+ NULL);
+ }
+
+ /* Mark this connection as replaced */
+ silc_server_backup_replaced_add(server, user_data->id,
+ backup_router);
+ }
+ } else if (backup_router) {
+ SILC_LOG_INFO(("Enabling the use of backup router %s",
+ backup_router->server_name));
+ SILC_LOG_DEBUG(("Enabling the use of backup router %s",
+ backup_router->server_name));
+
+ /* Mark this connection as replaced */
+ silc_server_backup_replaced_add(server, user_data->id,
+ backup_router);
+ }
+
+ if (!backup_router) {
+ /* Free all client entries that this server owns as they will
+ become invalid now as well. */
+ if (user_data->id)
+ silc_server_remove_clients_by_server(server, user_data, TRUE);
+ if (server->server_type == SILC_SERVER)
+ silc_server_remove_channels_by_server(server, user_data);
+ } else {
+ /* Update the client entries of this server to the new backup
+ router. This also removes the clients that *really* was owned
+ by the primary router and went down with the router. */
+ silc_server_update_clients_by_server(server, user_data, backup_router,
+ TRUE, TRUE);
+ silc_server_update_servers_by_server(server, user_data, backup_router);
+ if (server->server_type == SILC_SERVER)
+ silc_server_update_channels_by_server(server, user_data,
+ backup_router);
}
/* Free the server entry */
+ silc_server_backup_del(server, user_data);
+ silc_server_backup_replaced_del(server, user_data);
silc_idlist_del_data(user_data);
- silc_idlist_del_server(server->local_list, user_data);
+ if (!silc_idlist_del_server(server->local_list, user_data))
+ silc_idlist_del_server(server->global_list, user_data);
server->stat.my_servers--;
server->stat.servers--;
if (server->server_type == SILC_ROUTER)
server->stat.cell_servers--;
+
+ if (backup_router) {
+ /* Announce all of our stuff that was created about 5 minutes ago.
+ The backup router knows all the other stuff already. */
+ if (server->server_type == SILC_ROUTER)
+ silc_server_announce_servers(server, FALSE, time(0) - 300,
+ backup_router->connection);
+
+ /* Announce our clients and channels to the router */
+ silc_server_announce_clients(server, time(0) - 300,
+ backup_router->connection);
+ silc_server_announce_channels(server, time(0) - 300,
+ backup_router->connection);
+ }
break;
}
default:
}
}
- sock->user_data = NULL;
-}
-
-/* This function is used to remove all client entries by the server `entry'.
- This is called when the connection is lost to the server. In this case
- we must invalidate all the client entries owned by the server `entry'. */
-
-int silc_server_remove_clients_by_server(SilcServer server,
- SilcServerEntry entry)
-{
- SilcIDCacheList list = NULL;
- SilcIDCacheEntry id_cache = NULL;
- SilcClientEntry client = NULL;
-
- if (silc_idcache_find_by_id(server->local_list->clients,
- SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
-
- if (silc_idcache_list_first(list, &id_cache)) {
- while (id_cache) {
- client = (SilcClientEntry)id_cache->context;
-
- if (client->router != entry) {
- if (!silc_idcache_list_next(list, &id_cache))
- break;
- else
- continue;
- }
-
- /* Remove the client entry */
- silc_server_remove_from_channels(server, NULL, client);
- silc_idlist_del_client(server->local_list, client);
-
- if (!silc_idcache_list_next(list, &id_cache))
- break;
- }
- }
- silc_idcache_list_free(list);
- }
-
- if (silc_idcache_find_by_id(server->global_list->clients,
- SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
-
- if (silc_idcache_list_first(list, &id_cache)) {
- while (id_cache) {
- client = (SilcClientEntry)id_cache->context;
-
- if (client->router != entry) {
- if (!silc_idcache_list_next(list, &id_cache))
- break;
- else
- continue;
- }
-
- /* Remove the client entry */
- silc_server_remove_from_channels(server, NULL, client);
- silc_idlist_del_client(server->global_list, client);
-
- if (!silc_idcache_list_next(list, &id_cache))
- break;
- }
- }
- silc_idcache_list_free(list);
- }
-
- return TRUE;
-}
-
-/* Checks whether given channel has global users. If it does this returns
- TRUE and FALSE if there is only locally connected clients on the channel. */
-
-int silc_server_channel_has_global(SilcChannelEntry channel)
-{
- SilcChannelClientEntry chl;
-
- silc_list_start(channel->user_list);
- while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
- if (chl->client->router)
- return TRUE;
- }
-
- return FALSE;
-}
-
-/* Checks whether given channel has locally connected users. If it does this
- returns TRUE and FALSE if there is not one locally connected client. */
-
-int silc_server_channel_has_local(SilcChannelEntry channel)
-{
- SilcChannelClientEntry chl;
-
- silc_list_start(channel->user_list);
- while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
- if (!chl->client->router)
- return TRUE;
+ /* If any protocol is active cancel its execution */
+ if (sock->protocol) {
+ silc_protocol_cancel(sock->protocol, server->schedule);
+ sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
+ silc_protocol_execute_final(sock->protocol, server->schedule);
+ sock->protocol = NULL;
}
- return FALSE;
+ sock->user_data = NULL;
}
/* Removes client from all channels it has joined. This is used when client
void silc_server_remove_from_channels(SilcServer server,
SilcSocketConnection sock,
- SilcClientEntry client)
+ SilcClientEntry client,
+ int notify,
+ char *signoff_message,
+ int keygen)
{
SilcChannelEntry channel;
SilcChannelClientEntry chl;
+ SilcHashTableList htl;
SilcBuffer clidp;
SILC_LOG_DEBUG(("Start"));
/* Remove the client from all channels. The client is removed from
the channels' user list. */
- silc_list_start(client->channels);
- while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
+ silc_hash_table_list(client->channels, &htl);
+ while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
channel = chl->channel;
/* Remove channel from client's channel list */
- silc_list_del(client->channels, chl);
+ silc_hash_table_del(client->channels, channel);
/* Remove channel if there is no users anymore */
if (server->server_type == SILC_ROUTER &&
- silc_list_count(channel->user_list) < 2) {
- if (!silc_idlist_del_channel(server->local_list, channel))
- silc_idlist_del_channel(server->global_list, channel);
- server->stat.my_channels--;
+ silc_hash_table_count(channel->user_list) < 2) {
+ if (channel->rekey)
+ silc_schedule_task_del_by_context(server->schedule, channel->rekey);
+ if (silc_idlist_del_channel(server->local_list, channel))
+ server->stat.my_channels--;
+ else
+ silc_idlist_del_channel(server->global_list, channel);
continue;
}
/* Remove client from channel's client list */
- silc_list_del(channel->user_list, chl);
+ silc_hash_table_del(channel->user_list, chl->client);
+ channel->user_count--;
+
+ /* If there is no global users on the channel anymore mark the channel
+ as local channel. Do not check if the removed client is local client. */
+ if (server->server_type != SILC_ROUTER && channel->global_users &&
+ chl->client->router && !silc_server_channel_has_global(channel))
+ channel->global_users = FALSE;
+
silc_free(chl);
server->stat.my_chanclients--;
/* If there is not at least one local user on the channel then we don't
need the channel entry anymore, we can remove it safely. */
- if (server->server_type == SILC_SERVER &&
+ if (server->server_type != SILC_ROUTER &&
!silc_server_channel_has_local(channel)) {
/* Notify about leaving client if this channel has global users. */
- if (channel->global_users)
+ if (notify && channel->global_users)
silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
- SILC_NOTIFY_TYPE_SIGNOFF, 1,
- clidp->data, clidp->len);
+ SILC_NOTIFY_TYPE_SIGNOFF,
+ signoff_message ? 2 : 1,
+ clidp->data, clidp->len,
+ signoff_message, signoff_message ?
+ strlen(signoff_message) : 0);
+
+ if (channel->rekey)
+ silc_schedule_task_del_by_context(server->schedule, channel->rekey);
+
+ if (channel->founder_key) {
+ /* The founder auth data exists, do not remove the channel entry */
+ SilcChannelClientEntry chl2;
+ SilcHashTableList htl2;
+
+ channel->disabled = TRUE;
+
+ silc_hash_table_list(channel->user_list, &htl2);
+ while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
+ silc_hash_table_del(chl2->client->channels, channel);
+ silc_hash_table_del(channel->user_list, chl2->client);
+ channel->user_count--;
+ silc_free(chl2);
+ }
+ silc_hash_table_list_reset(&htl2);
+ continue;
+ }
- if (!silc_idlist_del_channel(server->local_list, channel))
- silc_idlist_del_channel(server->global_list, channel);
- server->stat.my_channels--;
+ /* Remove the channel entry */
+ if (silc_idlist_del_channel(server->local_list, channel))
+ server->stat.my_channels--;
+ else
+ silc_idlist_del_channel(server->global_list, channel);
continue;
}
/* Send notify to channel about client leaving SILC and thus
the entire channel. */
- silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
- SILC_NOTIFY_TYPE_SIGNOFF, 1,
- clidp->data, clidp->len);
+ if (notify)
+ silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
+ SILC_NOTIFY_TYPE_SIGNOFF,
+ signoff_message ? 2 : 1,
+ clidp->data, clidp->len,
+ signoff_message, signoff_message ?
+ strlen(signoff_message) : 0);
+
+ if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
+ /* Re-generate channel key */
+ if (!silc_server_create_channel_key(server, channel, 0))
+ goto out;
+
+ /* Send the channel key to the channel. The key of course is not sent
+ to the client who was removed from the channel. */
+ silc_server_send_channel_key(server, client->connection, channel,
+ server->server_type == SILC_ROUTER ?
+ FALSE : !server->standalone);
+ }
}
+ out:
+ silc_hash_table_list_reset(&htl);
silc_buffer_free(clidp);
}
SilcClientEntry client,
int notify)
{
- SilcChannelEntry ch;
SilcChannelClientEntry chl;
SilcBuffer clidp;
SILC_LOG_DEBUG(("Start"));
- clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
+ /* Get the entry to the channel, if this client is not on the channel
+ then return Ok. */
+ if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
+ return TRUE;
/* Remove the client from the channel. The client is removed from
the channel's user list. */
- silc_list_start(client->channels);
- while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
- if (chl->channel != channel)
- continue;
- ch = chl->channel;
-
- /* Remove channel from client's channel list */
- silc_list_del(client->channels, chl);
-
- /* Remove channel if there is no users anymore */
- if (server->server_type == SILC_ROUTER &&
- silc_list_count(channel->user_list) < 2) {
- if (!silc_idlist_del_channel(server->local_list, channel))
- silc_idlist_del_channel(server->global_list, channel);
- silc_buffer_free(clidp);
- server->stat.my_channels--;
- return FALSE;
- }
-
- /* Remove client from channel's client list */
- silc_list_del(channel->user_list, chl);
- silc_free(chl);
- server->stat.my_chanclients--;
-
- /* If there is no global users on the channel anymore mark the channel
- as local channel. */
- if (server->server_type == SILC_SERVER &&
- !silc_server_channel_has_global(channel))
- channel->global_users = FALSE;
+ clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
- /* If there is not at least one local user on the channel then we don't
- need the channel entry anymore, we can remove it safely. */
- if (server->server_type == SILC_SERVER &&
- !silc_server_channel_has_local(channel)) {
- /* Notify about leaving client if this channel has global users. */
- if (notify && channel->global_users)
- silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
- SILC_NOTIFY_TYPE_LEAVE, 1,
- clidp->data, clidp->len);
+ /* Remove channel from client's channel list */
+ silc_hash_table_del(client->channels, chl->channel);
- if (!silc_idlist_del_channel(server->local_list, channel))
- silc_idlist_del_channel(server->global_list, channel);
- silc_buffer_free(clidp);
+ /* Remove channel if there is no users anymore */
+ if (server->server_type == SILC_ROUTER &&
+ silc_hash_table_count(channel->user_list) < 2) {
+ if (channel->rekey)
+ silc_schedule_task_del_by_context(server->schedule, channel->rekey);
+ if (silc_idlist_del_channel(server->local_list, channel))
server->stat.my_channels--;
- return FALSE;
- }
+ else
+ silc_idlist_del_channel(server->global_list, channel);
+ silc_buffer_free(clidp);
+ return FALSE;
+ }
- /* Send notify to channel about client leaving the channel */
- if (notify)
+ /* Remove client from channel's client list */
+ silc_hash_table_del(channel->user_list, chl->client);
+ channel->user_count--;
+
+ /* If there is no global users on the channel anymore mark the channel
+ as local channel. Do not check if the client is local client. */
+ if (server->server_type != SILC_ROUTER && channel->global_users &&
+ chl->client->router && !silc_server_channel_has_global(channel))
+ channel->global_users = FALSE;
+
+ silc_free(chl);
+ server->stat.my_chanclients--;
+
+ /* If there is not at least one local user on the channel then we don't
+ need the channel entry anymore, we can remove it safely. */
+ if (server->server_type != SILC_ROUTER &&
+ !silc_server_channel_has_local(channel)) {
+ /* Notify about leaving client if this channel has global users. */
+ if (notify && channel->global_users)
silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
SILC_NOTIFY_TYPE_LEAVE, 1,
clidp->data, clidp->len);
- break;
- }
-
- silc_buffer_free(clidp);
- return TRUE;
-}
-
-/* Returns TRUE if the given client is on the channel. FALSE if not.
- This works because we assure that the user list on the channel is
- always in up to date thus we can only check the channel list from
- `client' which is faster than checking the user list from `channel'. */
+
+ silc_buffer_free(clidp);
+
+ if (channel->rekey)
+ silc_schedule_task_del_by_context(server->schedule, channel->rekey);
-int silc_server_client_on_channel(SilcClientEntry client,
- SilcChannelEntry channel)
-{
- SilcChannelClientEntry chl;
+ if (channel->founder_key) {
+ /* The founder auth data exists, do not remove the channel entry */
+ SilcChannelClientEntry chl2;
+ SilcHashTableList htl2;
+
+ channel->disabled = TRUE;
+
+ silc_hash_table_list(channel->user_list, &htl2);
+ while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
+ silc_hash_table_del(chl2->client->channels, channel);
+ silc_hash_table_del(channel->user_list, chl2->client);
+ channel->user_count--;
+ silc_free(chl2);
+ }
+ silc_hash_table_list_reset(&htl2);
+ return FALSE;
+ }
- if (!client || !channel)
+ /* Remove the channel entry */
+ if (silc_idlist_del_channel(server->local_list, channel))
+ server->stat.my_channels--;
+ else
+ silc_idlist_del_channel(server->global_list, channel);
return FALSE;
+ }
- silc_list_start(client->channels);
- while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
- if (chl->channel == channel)
- return TRUE;
+ /* Send notify to channel about client leaving the channel */
+ if (notify)
+ silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
+ SILC_NOTIFY_TYPE_LEAVE, 1,
+ clidp->data, clidp->len);
- return FALSE;
+ silc_buffer_free(clidp);
+ return TRUE;
}
/* Timeout callback. This is called if connection is idle or for some
SilcServer server = (SilcServer)context;
SilcSocketConnection sock = server->sockets[fd];
+ SILC_LOG_DEBUG(("Start"));
+
if (!sock)
return;
+ /* If we have protocol active we must assure that we call the protocol's
+ final callback so that all the memory is freed. */
+ if (sock->protocol) {
+ silc_protocol_cancel(sock->protocol, server->schedule);
+ sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
+ silc_protocol_execute_final(sock->protocol, server->schedule);
+ sock->protocol = NULL;
+ return;
+ }
+
if (sock->user_data)
- silc_server_free_sock_user_data(server, sock);
+ silc_server_free_sock_user_data(server, sock, NULL);
- silc_server_disconnect_remote(server, sock,
- "Server closed connection: "
+ silc_server_disconnect_remote(server, sock, "Server closed connection: "
"Connection timeout");
}
SilcChannelEntry silc_server_create_new_channel(SilcServer server,
SilcServerID *router_id,
char *cipher,
- char *channel_name)
+ char *hmac,
+ char *channel_name,
+ int broadcast)
{
SilcChannelID *channel_id;
SilcChannelEntry entry;
SilcCipher key;
+ SilcHmac newhmac;
SILC_LOG_DEBUG(("Creating new channel"));
if (!cipher)
- cipher = "twofish";
+ cipher = SILC_DEFAULT_CIPHER;
+ if (!hmac)
+ hmac = SILC_DEFAULT_HMAC;
/* Allocate cipher */
- silc_cipher_alloc(cipher, &key);
+ if (!silc_cipher_alloc(cipher, &key))
+ return NULL;
+
+ /* Allocate hmac */
+ if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
+ silc_cipher_free(key);
+ return NULL;
+ }
channel_name = strdup(channel_name);
- /* Create the channel */
- silc_id_create_channel_id(router_id, server->rng, &channel_id);
- entry = silc_idlist_add_channel(server->local_list, channel_name,
- SILC_CHANNEL_MODE_NONE, channel_id,
- NULL, key);
+ /* Create the channel ID */
+ if (!silc_id_create_channel_id(server, router_id, server->rng,
+ &channel_id)) {
+ silc_free(channel_name);
+ silc_cipher_free(key);
+ silc_hmac_free(newhmac);
+ return NULL;
+ }
+
+ /* Create the channel */
+ entry = silc_idlist_add_channel(server->local_list, channel_name,
+ SILC_CHANNEL_MODE_NONE, channel_id,
+ NULL, key, newhmac, 0);
if (!entry) {
silc_free(channel_name);
+ silc_cipher_free(key);
+ silc_hmac_free(newhmac);
+ silc_free(channel_id);
return NULL;
}
+ entry->cipher = strdup(cipher);
+ entry->hmac_name = strdup(hmac);
+
/* Now create the actual key material */
- silc_server_create_channel_key(server, entry, 16);
+ if (!silc_server_create_channel_key(server, entry,
+ silc_cipher_get_key_len(key) / 8)) {
+ silc_idlist_del_channel(server->local_list, entry);
+ return NULL;
+ }
/* Notify other routers about the new channel. We send the packet
to our primary route. */
- if (server->standalone == FALSE) {
+ if (broadcast && server->standalone == FALSE)
silc_server_send_new_channel(server, server->router->connection, TRUE,
- channel_name, entry->id, SILC_ID_CHANNEL_LEN);
+ channel_name, entry->id,
+ silc_id_get_len(entry->id, SILC_ID_CHANNEL),
+ entry->mode);
+
+ server->stat.my_channels++;
+
+ return entry;
+}
+
+/* Same as above but creates the channel with Channel ID `channel_id. */
+
+SilcChannelEntry
+silc_server_create_new_channel_with_id(SilcServer server,
+ char *cipher,
+ char *hmac,
+ char *channel_name,
+ SilcChannelID *channel_id,
+ int broadcast)
+{
+ SilcChannelEntry entry;
+ SilcCipher key;
+ SilcHmac newhmac;
+
+ SILC_LOG_DEBUG(("Creating new channel"));
+
+ if (!cipher)
+ cipher = SILC_DEFAULT_CIPHER;
+ if (!hmac)
+ hmac = SILC_DEFAULT_HMAC;
+
+ /* Allocate cipher */
+ if (!silc_cipher_alloc(cipher, &key))
+ return NULL;
+
+ /* Allocate hmac */
+ if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
+ silc_cipher_free(key);
+ return NULL;
+ }
+
+ channel_name = strdup(channel_name);
+
+ /* Create the channel */
+ entry = silc_idlist_add_channel(server->local_list, channel_name,
+ SILC_CHANNEL_MODE_NONE, channel_id,
+ NULL, key, newhmac, 0);
+ if (!entry) {
+ silc_cipher_free(key);
+ silc_hmac_free(newhmac);
+ silc_free(channel_name);
+ return NULL;
+ }
+
+ /* Now create the actual key material */
+ if (!silc_server_create_channel_key(server, entry,
+ silc_cipher_get_key_len(key) / 8)) {
+ silc_idlist_del_channel(server->local_list, entry);
+ return NULL;
}
+ /* Notify other routers about the new channel. We send the packet
+ to our primary route. */
+ if (broadcast && server->standalone == FALSE)
+ silc_server_send_new_channel(server, server->router->connection, TRUE,
+ channel_name, entry->id,
+ silc_id_get_len(entry->id, SILC_ID_CHANNEL),
+ entry->mode);
+
server->stat.my_channels++;
return entry;
}
+/* Channel's key re-key timeout callback. */
+
+SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
+{
+ SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
+ SilcServer server = (SilcServer)rekey->context;
+
+ rekey->task = NULL;
+
+ if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
+ return;
+
+ silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
+}
+
/* Generates new channel key. This is used to create the initial channel key
but also to re-generate new key for channel. If `key_len' is provided
it is the bytes of the key length. */
-void silc_server_create_channel_key(SilcServer server,
+bool silc_server_create_channel_key(SilcServer server,
SilcChannelEntry channel,
- unsigned int key_len)
+ uint32 key_len)
{
int i;
- unsigned char channel_key[32];
- unsigned int len;
+ unsigned char channel_key[32], hash[32];
+ uint32 len;
+
+ SILC_LOG_DEBUG(("Generating channel key"));
+
+ if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
+ SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
+ return TRUE;
+ }
if (!channel->channel_key)
- silc_cipher_alloc("twofish", &channel->channel_key);
+ if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
+ channel->channel_key = NULL;
+ return FALSE;
+ }
if (key_len)
len = key_len;
else if (channel->key_len)
len = channel->key_len / 8;
else
- len = sizeof(channel_key);
+ len = silc_cipher_get_key_len(channel->channel_key) / 8;
/* Create channel key */
for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
/* Set the key */
- channel->channel_key->cipher->set_key(channel->channel_key->context,
- channel_key, len);
+ silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
/* Remove old key if exists */
if (channel->key) {
/* Save the key */
channel->key_len = len * 8;
- channel->key = silc_calloc(len, sizeof(*channel->key));
- memcpy(channel->key, channel_key, len);
+ channel->key = silc_memdup(channel_key, len);
memset(channel_key, 0, sizeof(channel_key));
+
+ /* Generate HMAC key from the channel key data and set it */
+ if (!channel->hmac)
+ silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
+ silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
+ silc_hmac_set_key(channel->hmac, hash,
+ silc_hash_len(silc_hmac_get_hash(channel->hmac)));
+ memset(hash, 0, sizeof(hash));
+
+ if (server->server_type == SILC_ROUTER) {
+ if (!channel->rekey)
+ channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
+ channel->rekey->context = (void *)server;
+ channel->rekey->channel = channel;
+ channel->rekey->key_len = key_len;
+ if (channel->rekey->task)
+ silc_schedule_task_del(server->schedule, channel->rekey->task);
+
+ channel->rekey->task =
+ silc_schedule_task_add(server->schedule, 0,
+ silc_server_channel_key_rekey,
+ (void *)channel->rekey,
+ server->config->channel_rekey_secs, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
+ }
+
+ return TRUE;
}
/* Saves the channel key found in the encoded `key_payload' buffer. This
{
SilcChannelKeyPayload payload = NULL;
SilcChannelID *id = NULL;
- unsigned char *tmp;
- unsigned int tmp_len;
+ unsigned char *tmp, hash[32];
+ uint32 tmp_len;
char *cipher;
+ SILC_LOG_DEBUG(("Start"));
+
/* Decode channel key payload */
- payload = silc_channel_key_payload_parse(key_payload);
+ payload = silc_channel_key_payload_parse(key_payload->data,
+ key_payload->len);
if (!payload) {
- SILC_LOG_ERROR(("Bad channel key payload, dropped"));
+ SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
channel = NULL;
goto out;
}
if (!channel) {
channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
if (!channel) {
- SILC_LOG_ERROR(("Received key for non-existent channel"));
+ SILC_LOG_ERROR(("Received key for non-existent channel %s",
+ silc_id_render(id, SILC_ID_CHANNEL)));
goto out;
}
}
goto out;
}
- cipher = silc_channel_key_get_cipher(payload, NULL);;
+ cipher = silc_channel_key_get_cipher(payload, NULL);
if (!cipher) {
channel = NULL;
goto out;
/* Create new cipher */
if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
+ channel->channel_key = NULL;
channel = NULL;
goto out;
}
+ if (channel->cipher)
+ silc_free(channel->cipher);
+ channel->cipher = strdup(cipher);
+
/* Save the key */
channel->key_len = tmp_len * 8;
- channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
- memcpy(channel->key, tmp, tmp_len);
- channel->channel_key->cipher->set_key(channel->channel_key->context,
- tmp, tmp_len);
+ channel->key = silc_memdup(tmp, tmp_len);
+ silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
+
+ /* Generate HMAC key from the channel key data and set it */
+ if (!channel->hmac)
+ silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
+ silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
+ silc_hmac_set_key(channel->hmac, hash,
+ silc_hash_len(silc_hmac_get_hash(channel->hmac)));
+
+ memset(hash, 0, sizeof(hash));
+ memset(tmp, 0, tmp_len);
+
+ if (server->server_type == SILC_ROUTER) {
+ if (!channel->rekey)
+ channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
+ channel->rekey->context = (void *)server;
+ channel->rekey->channel = channel;
+ if (channel->rekey->task)
+ silc_schedule_task_del(server->schedule, channel->rekey->task);
+
+ channel->rekey->task =
+ silc_schedule_task_add(server->schedule, 0,
+ silc_server_channel_key_rekey,
+ (void *)channel->rekey,
+ server->config->channel_rekey_secs, 0,
+ SILC_TASK_TIMEOUT,
+ SILC_TASK_PRI_NORMAL);
+ }
out:
- if (id)
- silc_free(id);
+ silc_free(id);
if (payload)
silc_channel_key_payload_free(payload);
{
SilcServerHBContext hb = (SilcServerHBContext)hb_context;
- SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
- sock->ip));
+ SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname, sock->ip));
/* Send the heartbeat */
silc_server_send_heartbeat(hb->server, sock);
}
+
+/* Returns assembled of all servers in the given ID list. The packet's
+ form is dictated by the New ID payload. */
+
+static void silc_server_announce_get_servers(SilcServer server,
+ SilcServerEntry remote,
+ SilcIDList id_list,
+ SilcBuffer *servers,
+ unsigned long creation_time)
+{
+ SilcIDCacheList list;
+ SilcIDCacheEntry id_cache;
+ SilcServerEntry entry;
+ SilcBuffer idp;
+
+ /* Go through all clients in the list */
+ if (silc_idcache_get_all(id_list->servers, &list)) {
+ if (silc_idcache_list_first(list, &id_cache)) {
+ while (id_cache) {
+ entry = (SilcServerEntry)id_cache->context;
+
+ /* Do not announce the one we've sending our announcements and
+ do not announce ourself. Also check the creation time if it's
+ provided. */
+ if ((entry == remote) || (entry == server->id_entry) ||
+ (creation_time && entry->data.created < creation_time)) {
+ if (!silc_idcache_list_next(list, &id_cache))
+ break;
+ continue;
+ }
+
+ idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
+
+ *servers = silc_buffer_realloc(*servers,
+ (*servers ?
+ (*servers)->truelen + idp->len :
+ idp->len));
+ silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
+ silc_buffer_put(*servers, idp->data, idp->len);
+ silc_buffer_pull(*servers, idp->len);
+ silc_buffer_free(idp);
+
+ if (!silc_idcache_list_next(list, &id_cache))
+ break;
+ }
+ }
+
+ silc_idcache_list_free(list);
+ }
+}
+
+static SilcBuffer
+silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
+{
+ va_list ap;
+ SilcBuffer p;
+
+ va_start(ap, argc);
+ p = silc_notify_payload_encode(notify, argc, ap);
+ va_end(ap);
+
+ return p;
+}
+
+/* This function is used by router to announce existing servers to our
+ primary router when we've connected to it. If `creation_time' is non-zero
+ then only the servers that has been created after the `creation_time'
+ will be announced. */
+
+void silc_server_announce_servers(SilcServer server, bool global,
+ unsigned long creation_time,
+ SilcSocketConnection remote)
+{
+ SilcBuffer servers = NULL;
+
+ SILC_LOG_DEBUG(("Announcing servers"));
+
+ /* Get servers in local list */
+ silc_server_announce_get_servers(server, remote->user_data,
+ server->local_list, &servers,
+ creation_time);
+
+ if (global)
+ /* Get servers in global list */
+ silc_server_announce_get_servers(server, remote->user_data,
+ server->global_list, &servers,
+ creation_time);
+
+ if (servers) {
+ silc_buffer_push(servers, servers->data - servers->head);
+ SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
+
+ /* Send the packet */
+ silc_server_packet_send(server, remote,
+ SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
+ servers->data, servers->len, TRUE);
+
+ silc_buffer_free(servers);
+ }
+}
+
+/* Returns assembled packet of all clients in the given ID list. The
+ packet's form is dictated by the New ID Payload. */
+
+static void silc_server_announce_get_clients(SilcServer server,
+ SilcIDList id_list,
+ SilcBuffer *clients,
+ SilcBuffer *umodes,
+ unsigned long creation_time)
+{
+ SilcIDCacheList list;
+ SilcIDCacheEntry id_cache;
+ SilcClientEntry client;
+ SilcBuffer idp;
+ SilcBuffer tmp;
+ unsigned char mode[4];
+
+ /* Go through all clients in the list */
+ if (silc_idcache_get_all(id_list->clients, &list)) {
+ if (silc_idcache_list_first(list, &id_cache)) {
+ while (id_cache) {
+ client = (SilcClientEntry)id_cache->context;
+
+ if (creation_time && client->data.created < creation_time) {
+ if (!silc_idcache_list_next(list, &id_cache))
+ break;
+ continue;
+ }
+
+ idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
+
+ *clients = silc_buffer_realloc(*clients,
+ (*clients ?
+ (*clients)->truelen + idp->len :
+ idp->len));
+ silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
+ silc_buffer_put(*clients, idp->data, idp->len);
+ silc_buffer_pull(*clients, idp->len);
+
+ SILC_PUT32_MSB(client->mode, mode);
+ tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
+ 2, idp->data, idp->len,
+ mode, 4);
+ *umodes = silc_buffer_realloc(*umodes,
+ (*umodes ?
+ (*umodes)->truelen + tmp->len :
+ tmp->len));
+ silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
+ silc_buffer_put(*umodes, tmp->data, tmp->len);
+ silc_buffer_pull(*umodes, tmp->len);
+ silc_buffer_free(tmp);
+
+ silc_buffer_free(idp);
+
+ if (!silc_idcache_list_next(list, &id_cache))
+ break;
+ }
+ }
+
+ silc_idcache_list_free(list);
+ }
+}
+
+/* This function is used to announce our existing clients to our router
+ when we've connected to it. If `creation_time' is non-zero then only
+ the clients that has been created after the `creation_time' will be
+ announced. */
+
+void silc_server_announce_clients(SilcServer server,
+ unsigned long creation_time,
+ SilcSocketConnection remote)
+{
+ SilcBuffer clients = NULL;
+ SilcBuffer umodes = NULL;
+
+ SILC_LOG_DEBUG(("Announcing clients"));
+
+ /* Get clients in local list */
+ silc_server_announce_get_clients(server, server->local_list,
+ &clients, &umodes, creation_time);
+
+ /* As router we announce our global list as well */
+ if (server->server_type == SILC_ROUTER)
+ silc_server_announce_get_clients(server, server->global_list,
+ &clients, &umodes, creation_time);
+
+ if (clients) {
+ silc_buffer_push(clients, clients->data - clients->head);
+ SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
+
+ /* Send the packet */
+ silc_server_packet_send(server, remote,
+ SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
+ clients->data, clients->len, TRUE);
+
+ silc_buffer_free(clients);
+ }
+
+ if (umodes) {
+ silc_buffer_push(umodes, umodes->data - umodes->head);
+ SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
+
+ /* Send the packet */
+ silc_server_packet_send(server, remote,
+ SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
+ umodes->data, umodes->len, TRUE);
+
+ silc_buffer_free(umodes);
+ }
+}
+
+/* Returns channel's topic for announcing it */
+
+void silc_server_announce_get_channel_topic(SilcServer server,
+ SilcChannelEntry channel,
+ SilcBuffer *topic)
+{
+ SilcBuffer chidp;
+
+ if (channel->topic) {
+ chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
+ *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
+ chidp->data, chidp->len,
+ channel->topic,
+ strlen(channel->topic));
+ silc_buffer_free(chidp);
+ }
+}
+
+/* Returns assembled packets for channel users of the `channel'. */
+
+void silc_server_announce_get_channel_users(SilcServer server,
+ SilcChannelEntry channel,
+ SilcBuffer *channel_users,
+ SilcBuffer *channel_users_modes)
+{
+ SilcChannelClientEntry chl;
+ SilcHashTableList htl;
+ SilcBuffer chidp, clidp;
+ SilcBuffer tmp;
+ int len;
+ unsigned char mode[4];
+
+ SILC_LOG_DEBUG(("Start"));
+
+ /* Now find all users on the channel */
+ chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
+ silc_hash_table_list(channel->user_list, &htl);
+ while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
+ clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
+
+ /* JOIN Notify */
+ tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
+ clidp->data, clidp->len,
+ chidp->data, chidp->len);
+ len = tmp->len;
+ *channel_users =
+ silc_buffer_realloc(*channel_users,
+ (*channel_users ?
+ (*channel_users)->truelen + len : len));
+ silc_buffer_pull_tail(*channel_users,
+ ((*channel_users)->end -
+ (*channel_users)->data));
+
+ silc_buffer_put(*channel_users, tmp->data, tmp->len);
+ silc_buffer_pull(*channel_users, len);
+ silc_buffer_free(tmp);
+
+ /* CUMODE notify for mode change on the channel */
+ SILC_PUT32_MSB(chl->mode, mode);
+ tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
+ 3, clidp->data, clidp->len,
+ mode, 4,
+ clidp->data, clidp->len);
+ len = tmp->len;
+ *channel_users_modes =
+ silc_buffer_realloc(*channel_users_modes,
+ (*channel_users_modes ?
+ (*channel_users_modes)->truelen + len : len));
+ silc_buffer_pull_tail(*channel_users_modes,
+ ((*channel_users_modes)->end -
+ (*channel_users_modes)->data));
+
+ silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
+ silc_buffer_pull(*channel_users_modes, len);
+ silc_buffer_free(tmp);
+
+ silc_buffer_free(clidp);
+ }
+ silc_hash_table_list_reset(&htl);
+ silc_buffer_free(chidp);
+}
+
+/* Returns assembled packets for all channels and users on those channels
+ from the given ID List. The packets are in the form dictated by the
+ New Channel and New Channel User payloads. */
+
+void silc_server_announce_get_channels(SilcServer server,
+ SilcIDList id_list,
+ SilcBuffer *channels,
+ SilcBuffer *channel_users,
+ SilcBuffer **channel_users_modes,
+ uint32 *channel_users_modes_c,
+ SilcBuffer **channel_topics,
+ SilcChannelID ***channel_ids,
+ unsigned long creation_time)
+{
+ SilcIDCacheList list;
+ SilcIDCacheEntry id_cache;
+ SilcChannelEntry channel;
+ unsigned char *cid;
+ uint32 id_len;
+ uint16 name_len;
+ int len;
+ int i = *channel_users_modes_c;
+ bool announce;
+
+ SILC_LOG_DEBUG(("Start"));
+
+ /* Go through all channels in the list */
+ if (silc_idcache_get_all(id_list->channels, &list)) {
+ if (silc_idcache_list_first(list, &id_cache)) {
+ while (id_cache) {
+ channel = (SilcChannelEntry)id_cache->context;
+
+ if (creation_time && channel->created < creation_time)
+ announce = FALSE;
+ else
+ announce = TRUE;
+
+ cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
+ id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
+ name_len = strlen(channel->channel_name);
+
+ if (announce) {
+ len = 4 + name_len + id_len + 4;
+ *channels =
+ silc_buffer_realloc(*channels,
+ (*channels ? (*channels)->truelen +
+ len : len));
+ silc_buffer_pull_tail(*channels,
+ ((*channels)->end - (*channels)->data));
+ silc_buffer_format(*channels,
+ SILC_STR_UI_SHORT(name_len),
+ SILC_STR_UI_XNSTRING(channel->channel_name,
+ name_len),
+ SILC_STR_UI_SHORT(id_len),
+ SILC_STR_UI_XNSTRING(cid, id_len),
+ SILC_STR_UI_INT(channel->mode),
+ SILC_STR_END);
+ silc_buffer_pull(*channels, len);
+ }
+
+ /* Channel user modes */
+ *channel_users_modes = silc_realloc(*channel_users_modes,
+ sizeof(**channel_users_modes) *
+ (i + 1));
+ (*channel_users_modes)[i] = NULL;
+ *channel_ids = silc_realloc(*channel_ids,
+ sizeof(**channel_ids) * (i + 1));
+ (*channel_ids)[i] = NULL;
+ silc_server_announce_get_channel_users(server, channel,
+ channel_users,
+ &(*channel_users_modes)[i]);
+ (*channel_ids)[i] = channel->id;
+
+ /* Channel's topic */
+ *channel_topics = silc_realloc(*channel_topics,
+ sizeof(**channel_topics) * (i + 1));
+ (*channel_topics)[i] = NULL;
+ silc_server_announce_get_channel_topic(server, channel,
+ &(*channel_topics)[i]);
+ i++;
+
+ if (!silc_idcache_list_next(list, &id_cache))
+ break;
+ }
+
+ *channel_users_modes_c += i;
+ }
+
+ silc_idcache_list_free(list);
+ }
+}
+
+/* This function is used to announce our existing channels to our router
+ when we've connected to it. This also announces the users on the
+ channels to the router. If the `creation_time' is non-zero only the
+ channels that was created after the `creation_time' are announced.
+ Note that the channel users are still announced even if the `creation_time'
+ was provided. */
+
+void silc_server_announce_channels(SilcServer server,
+ unsigned long creation_time,
+ SilcSocketConnection remote)
+{
+ SilcBuffer channels = NULL, channel_users = NULL;
+ SilcBuffer *channel_users_modes = NULL;
+ SilcBuffer *channel_topics = NULL;
+ uint32 channel_users_modes_c = 0;
+ SilcChannelID **channel_ids = NULL;
+
+ SILC_LOG_DEBUG(("Announcing channels and channel users"));
+
+ /* Get channels and channel users in local list */
+ silc_server_announce_get_channels(server, server->local_list,
+ &channels, &channel_users,
+ &channel_users_modes,
+ &channel_users_modes_c,
+ &channel_topics,
+ &channel_ids, creation_time);
+
+ /* Get channels and channel users in global list */
+ if (server->server_type != SILC_SERVER)
+ silc_server_announce_get_channels(server, server->global_list,
+ &channels, &channel_users,
+ &channel_users_modes,
+ &channel_users_modes_c,
+ &channel_topics,
+ &channel_ids, creation_time);
+
+ if (channels) {
+ silc_buffer_push(channels, channels->data - channels->head);
+ SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
+
+ /* Send the packet */
+ silc_server_packet_send(server, remote,
+ SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
+ channels->data, channels->len,
+ FALSE);
+
+ silc_buffer_free(channels);
+ }
+
+ if (channel_users) {
+ silc_buffer_push(channel_users, channel_users->data - channel_users->head);
+ SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
+ channel_users->len);
+
+ /* Send the packet */
+ silc_server_packet_send(server, remote,
+ SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
+ channel_users->data, channel_users->len,
+ FALSE);
+
+ silc_buffer_free(channel_users);
+ }
+
+ if (channel_users_modes) {
+ int i;
+
+ for (i = 0; i < channel_users_modes_c; i++) {
+ if (!channel_users_modes[i])
+ continue;
+ silc_buffer_push(channel_users_modes[i],
+ channel_users_modes[i]->data -
+ channel_users_modes[i]->head);
+ SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
+ channel_users_modes[i]->len);
+ silc_server_packet_send_dest(server, remote,
+ SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
+ channel_ids[i], SILC_ID_CHANNEL,
+ channel_users_modes[i]->data,
+ channel_users_modes[i]->len,
+ FALSE);
+ silc_buffer_free(channel_users_modes[i]);
+ }
+ silc_free(channel_users_modes);
+ }
+
+ if (channel_topics) {
+ int i;
+
+ for (i = 0; i < channel_users_modes_c; i++) {
+ if (!channel_topics[i])
+ continue;
+
+ silc_buffer_push(channel_topics[i],
+ channel_topics[i]->data -
+ channel_topics[i]->head);
+ SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
+ channel_topics[i]->len);
+ silc_server_packet_send_dest(server, remote,
+ SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
+ channel_ids[i], SILC_ID_CHANNEL,
+ channel_topics[i]->data,
+ channel_topics[i]->len,
+ FALSE);
+ silc_buffer_free(channel_topics[i]);
+ }
+ silc_free(channel_topics);
+ }
+
+ silc_free(channel_ids);
+}
+
+/* Failure timeout callback. If this is called then we will immediately
+ process the received failure. We always process the failure with timeout
+ since we do not want to blindly trust to received failure packets.
+ This won't be called (the timeout is cancelled) if the failure was
+ bogus (it is bogus if remote does not close the connection after sending
+ the failure). */
+
+SILC_TASK_CALLBACK(silc_server_failure_callback)
+{
+ SilcServerFailureContext f = (SilcServerFailureContext)context;
+
+ if (f->sock->protocol) {
+ f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
+ silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
+ }
+
+ silc_free(f);
+}
+
+/* Assembles user list and users mode list from the `channel'. */
+
+void silc_server_get_users_on_channel(SilcServer server,
+ SilcChannelEntry channel,
+ SilcBuffer *user_list,
+ SilcBuffer *mode_list,
+ uint32 *user_count)
+{
+ SilcChannelClientEntry chl;
+ SilcHashTableList htl;
+ SilcBuffer client_id_list;
+ SilcBuffer client_mode_list;
+ SilcBuffer idp;
+ uint32 list_count = 0, len = 0;
+
+ silc_hash_table_list(channel->user_list, &htl);
+ while (silc_hash_table_get(&htl, NULL, (void *)&chl))
+ len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
+ silc_hash_table_list_reset(&htl);
+
+ client_id_list = silc_buffer_alloc(len);
+ client_mode_list =
+ silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
+ silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
+ silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
+
+ silc_hash_table_list(channel->user_list, &htl);
+ while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
+ /* Client ID */
+ idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
+ silc_buffer_put(client_id_list, idp->data, idp->len);
+ silc_buffer_pull(client_id_list, idp->len);
+ silc_buffer_free(idp);
+
+ /* Client's mode on channel */
+ SILC_PUT32_MSB(chl->mode, client_mode_list->data);
+ silc_buffer_pull(client_mode_list, 4);
+
+ list_count++;
+ }
+ silc_hash_table_list_reset(&htl);
+ silc_buffer_push(client_id_list,
+ client_id_list->data - client_id_list->head);
+ silc_buffer_push(client_mode_list,
+ client_mode_list->data - client_mode_list->head);
+
+ *user_list = client_id_list;
+ *mode_list = client_mode_list;
+ *user_count = list_count;
+}
+
+/* Saves users and their modes to the `channel'. */
+
+void silc_server_save_users_on_channel(SilcServer server,
+ SilcSocketConnection sock,
+ SilcChannelEntry channel,
+ SilcClientID *noadd,
+ SilcBuffer user_list,
+ SilcBuffer mode_list,
+ uint32 user_count)
+{
+ int i;
+ uint16 idp_len;
+ uint32 mode;
+ SilcClientID *client_id;
+ SilcClientEntry client;
+ SilcIDCacheEntry cache;
+ bool global;
+
+ SILC_LOG_DEBUG(("Start"));
+
+ for (i = 0; i < user_count; i++) {
+ /* Client ID */
+ SILC_GET16_MSB(idp_len, user_list->data + 2);
+ idp_len += 4;
+ client_id = silc_id_payload_parse_id(user_list->data, idp_len);
+ silc_buffer_pull(user_list, idp_len);
+ if (!client_id)
+ continue;
+
+ /* Mode */
+ SILC_GET32_MSB(mode, mode_list->data);
+ silc_buffer_pull(mode_list, 4);
+
+ if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
+ silc_free(client_id);
+ continue;
+ }
+
+ global = FALSE;
+
+ /* Check if we have this client cached already. */
+ client = silc_idlist_find_client_by_id(server->local_list, client_id,
+ server->server_type, &cache);
+ if (!client) {
+ client = silc_idlist_find_client_by_id(server->global_list,
+ client_id, server->server_type,
+ &cache);
+ global = TRUE;
+ }
+ if (!client) {
+ /* If router did not find such Client ID in its lists then this must
+ be bogus client or some router in the net is buggy. */
+ if (server->server_type == SILC_ROUTER) {
+ silc_free(client_id);
+ continue;
+ }
+
+ /* We don't have that client anywhere, add it. The client is added
+ to global list since server didn't have it in the lists so it must be
+ global. */
+ client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
+ silc_id_dup(client_id, SILC_ID_CLIENT),
+ sock->user_data, NULL, 0);
+ if (!client) {
+ SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
+ silc_free(client_id);
+ continue;
+ }
+
+ client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
+ } else {
+ /* Found, if it is from global list we'll assure that we won't
+ expire it now that the entry is on channel. */
+ if (global)
+ cache->expire = 0;
+ }
+
+ silc_free(client_id);
+
+ if (!silc_server_client_on_channel(client, channel)) {
+ /* Client was not on the channel, add it. */
+ SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
+ chl->client = client;
+ chl->mode = mode;
+ chl->channel = channel;
+ silc_hash_table_add(channel->user_list, chl->client, chl);
+ silc_hash_table_add(client->channels, chl->channel, chl);
+ channel->user_count++;
+ }
+ }
+}
+
+/* Lookups route to the client indicated by the `id_data'. The connection
+ object and internal data object is returned. Returns NULL if route
+ could not be found to the client. If the `client_id' is specified then
+ it is used and the `id_data' is ignored. */
+
+SilcSocketConnection silc_server_get_client_route(SilcServer server,
+ unsigned char *id_data,
+ uint32 id_len,
+ SilcClientID *client_id,
+ SilcIDListData *idata)
+{
+ SilcClientID *id;
+ SilcClientEntry client;
+
+ SILC_LOG_DEBUG(("Start"));
+
+ /* Decode destination Client ID */
+ if (!client_id) {
+ id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
+ if (!id) {
+ SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
+ return NULL;
+ }
+ } else {
+ id = silc_id_dup(client_id, SILC_ID_CLIENT);
+ }
+
+ /* If the destination belongs to our server we don't have to route
+ the packet anywhere but to send it to the local destination. */
+ client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
+ if (client) {
+ silc_free(id);
+
+ /* If we are router and the client has router then the client is in
+ our cell but not directly connected to us. */
+ if (server->server_type == SILC_ROUTER && client->router) {
+ /* We are of course in this case the client's router thus the route
+ to the client is the server who owns the client. So, we will send
+ the packet to that server. */
+ if (idata)
+ *idata = (SilcIDListData)client->router;
+ return client->router->connection;
+ }
+
+ /* Seems that client really is directly connected to us */
+ if (idata)
+ *idata = (SilcIDListData)client;
+ return client->connection;
+ }
+
+ /* Destination belongs to someone not in this server. If we are normal
+ server our action is to send the packet to our router. */
+ if (server->server_type != SILC_ROUTER && !server->standalone) {
+ silc_free(id);
+ if (idata)
+ *idata = (SilcIDListData)server->router;
+ return server->router->connection;
+ }
+
+ /* We are router and we will perform route lookup for the destination
+ and send the packet to fastest route. */
+ if (server->server_type == SILC_ROUTER && !server->standalone) {
+ /* Check first that the ID is valid */
+ client = silc_idlist_find_client_by_id(server->global_list, id,
+ TRUE, NULL);
+ if (client) {
+ SilcSocketConnection dst_sock;
+
+ dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
+
+ silc_free(id);
+ if (idata)
+ *idata = (SilcIDListData)dst_sock->user_data;
+ return dst_sock;
+ }
+ }
+
+ silc_free(id);
+ return NULL;
+}
+
+/* Encodes and returns channel list of channels the `client' has joined.
+ Secret channels are not put to the list. */
+
+SilcBuffer silc_server_get_client_channel_list(SilcServer server,
+ SilcClientEntry client)
+{
+ SilcBuffer buffer = NULL;
+ SilcChannelEntry channel;
+ SilcChannelClientEntry chl;
+ SilcHashTableList htl;
+ unsigned char *cid;
+ uint32 id_len;
+ uint16 name_len;
+ int len;
+
+ silc_hash_table_list(client->channels, &htl);
+ while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
+ channel = chl->channel;
+
+ if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
+ channel->mode & SILC_CHANNEL_MODE_PRIVATE)
+ continue;
+
+ cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
+ id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
+ name_len = strlen(channel->channel_name);
+
+ len = 4 + name_len + id_len + 4;
+ buffer = silc_buffer_realloc(buffer,
+ (buffer ? (buffer)->truelen + len : len));
+ silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
+ silc_buffer_format(buffer,
+ SILC_STR_UI_SHORT(name_len),
+ SILC_STR_UI_XNSTRING(channel->channel_name,
+ name_len),
+ SILC_STR_UI_SHORT(id_len),
+ SILC_STR_UI_XNSTRING(cid, id_len),
+ SILC_STR_UI_INT(chl->mode), /* Client's mode */
+ SILC_STR_END);
+ silc_buffer_pull(buffer, len);
+ silc_free(cid);
+ }
+ silc_hash_table_list_reset(&htl);
+
+ if (buffer)
+ silc_buffer_push(buffer, buffer->data - buffer->head);
+
+ return buffer;
+}
+
+/* Finds client entry by Client ID and if it is not found then resolves
+ it using WHOIS command. */
+
+SilcClientEntry silc_server_get_client_resolve(SilcServer server,
+ SilcClientID *client_id,
+ bool *resolved)
+{
+ SilcClientEntry client;
+
+ if (resolved)
+ *resolved = FALSE;
+
+ client = silc_idlist_find_client_by_id(server->local_list, client_id,
+ TRUE, NULL);
+ if (!client) {
+ client = silc_idlist_find_client_by_id(server->global_list,
+ client_id, TRUE, NULL);
+ if (!client && server->server_type == SILC_ROUTER)
+ return NULL;
+ }
+
+ if (!client && server->standalone)
+ return NULL;
+
+ if (!client || !client->nickname || !client->username) {
+ SilcBuffer buffer, idp;
+
+ client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
+ client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
+ client->resolve_cmd_ident = ++server->cmd_ident;
+
+ idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
+ buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
+ server->cmd_ident, 1,
+ 3, idp->data, idp->len);
+ silc_server_packet_send(server, client ? client->router->connection :
+ server->router->connection,
+ SILC_PACKET_COMMAND, 0,
+ buffer->data, buffer->len, FALSE);
+ silc_buffer_free(idp);
+ silc_buffer_free(buffer);
+
+ if (resolved)
+ *resolved = TRUE;
+
+ return NULL;
+ }
+
+ return client;
+}
+
+/* A timeout callback for the re-key. We will be the initiator of the
+ re-key protocol. */
+
+SILC_TASK_CALLBACK(silc_server_rekey_callback)
+{
+ SilcSocketConnection sock = (SilcSocketConnection)context;
+ SilcIDListData idata = (SilcIDListData)sock->user_data;
+ SilcServer server = (SilcServer)idata->rekey->context;
+ SilcProtocol protocol;
+ SilcServerRekeyInternalContext *proto_ctx;
+
+ SILC_LOG_DEBUG(("Start"));
+
+ /* Allocate internal protocol context. This is sent as context
+ to the protocol. */
+ proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
+ proto_ctx->server = (void *)server;
+ proto_ctx->sock = sock;
+ proto_ctx->responder = FALSE;
+ proto_ctx->pfs = idata->rekey->pfs;
+
+ /* Perform rekey protocol. Will call the final callback after the
+ protocol is over. */
+ silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
+ &protocol, proto_ctx, silc_server_rekey_final);
+ sock->protocol = protocol;
+
+ /* Run the protocol */
+ silc_protocol_execute(protocol, server->schedule, 0, 0);
+
+ /* Re-register re-key timeout */
+ silc_schedule_task_add(server->schedule, sock->sock,
+ silc_server_rekey_callback,
+ context, idata->rekey->timeout, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
+}
+
+/* The final callback for the REKEY protocol. This will actually take the
+ new key material into use. */
+
+SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
+{
+ SilcProtocol protocol = (SilcProtocol)context;
+ SilcServerRekeyInternalContext *ctx =
+ (SilcServerRekeyInternalContext *)protocol->context;
+ SilcServer server = (SilcServer)ctx->server;
+ SilcSocketConnection sock = ctx->sock;
+
+ SILC_LOG_DEBUG(("Start"));
+
+ if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
+ protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
+ /* Error occured during protocol */
+ SILC_LOG_ERROR(("Error occurred during rekey protocol"));
+ silc_protocol_cancel(protocol, server->schedule);
+ silc_protocol_free(protocol);
+ sock->protocol = NULL;
+ if (ctx->packet)
+ silc_packet_context_free(ctx->packet);
+ if (ctx->ske)
+ silc_ske_free(ctx->ske);
+ silc_free(ctx);
+ return;
+ }
+
+ /* Purge the outgoing data queue to assure that all rekey packets really
+ go to the network before we quit the protocol. */
+ silc_server_packet_queue_purge(server, sock);
+
+ /* Cleanup */
+ silc_protocol_free(protocol);
+ sock->protocol = NULL;
+ if (ctx->packet)
+ silc_packet_context_free(ctx->packet);
+ if (ctx->ske)
+ silc_ske_free(ctx->ske);
+ silc_free(ctx);
+}
projects / silc.git / blobdiff