Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2006 Pekka Riikonen
+ Copyright (C) 1997 - 2008 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
GNU General Public License for more details.
*/
-/* $Id$ */
#include "silc.h"
#include "silcclient.h"
#include "client_internal.h"
-/************************** Types and definitions ***************************/
-
-
/************************ Static utility functions **************************/
/* Connection machine FSM destructor. This will finish the thread where
SilcClientConnection conn = fsm_context;
SilcFSMThread thread = destructor_context;
+ SILC_LOG_DEBUG(("Connection %p finished", conn));
+
/* Delete connection */
silc_client_del_connection(conn->client, conn);
- /* Finish the thread were this machine was running */
+ /* Finish the thread were this machine was running. Its destructor is the
+ silc_client_connection_finished. */
silc_fsm_finish(thread);
}
+/* Connection thread FSM destructor. This was the thread where the connection
+ machine was running (may be real thread). From here we notify client
+ that the connection thread has finished. */
+
+static void silc_client_connection_finished(SilcFSMThread fsm,
+ void *fsm_context,
+ void *destructor_context)
+{
+ SilcClient client = silc_fsm_get_state_context(fsm);
+
+ /* Signal client that we have finished */
+ silc_atomic_sub_int32(&client->internal->conns, 1);
+ client->internal->connection_closed = TRUE;
+ SILC_FSM_EVENT_SIGNAL(&client->internal->wait_event);
+
+ silc_fsm_free(fsm);
+}
+
/* Packet FSM thread destructor */
static void silc_client_packet_destructor(SilcFSMThread thread,
case SILC_PACKET_KEY_EXCHANGE:
case SILC_PACKET_KEY_EXCHANGE_1:
case SILC_PACKET_KEY_EXCHANGE_2:
- case SILC_PACKET_REKEY:
case SILC_PACKET_REKEY_DONE:
case SILC_PACKET_CONNECTION_AUTH:
- case SILC_PACKET_CONNECTION_AUTH_REQUEST:
return FALSE;
break;
}
void *callback_context,
void *stream_context)
{
- SILC_LOG_DEBUG(("End of stream received"));
+ SilcClientConnection conn = stream_context;
+
+ SILC_LOG_DEBUG(("Remote disconnected connection"));
+
+ /* Signal to close connection */
+ conn->internal->status = SILC_CLIENT_CONN_DISCONNECTED;
+ if (!conn->internal->disconnected) {
+ conn->internal->disconnected = TRUE;
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
+ }
}
/* Packet engine callback to indicate error */
void *callback_context,
void *stream_context)
{
+ SilcClient client = callback_context;
+ SilcClientConnection conn = stream_context;
+
+ /* Read and write errors are silent */
+ if (error == SILC_PACKET_ERR_READ || error == SILC_PACKET_ERR_WRITE)
+ return;
+ client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_ERROR,
+ (char *)silc_packet_error_string(error));
}
/* Packet stream callbacks */
silc_fsm_free(fsm);
}
+/* Connect abort operation */
+
+static void silc_client_connect_abort(SilcAsyncOperation op, void *context)
+{
+ SilcClientConnection conn = context;
+
+ SILC_LOG_DEBUG(("Connection %p aborted by application", conn));
+
+ /* Connection callback will not be called after user aborted connecting */
+ conn->callback = NULL;
+ conn->internal->cop = NULL;
+
+ /* Signal to close connection */
+ if (!conn->internal->disconnected) {
+ conn->internal->disconnected = TRUE;
+
+ /* If user aborts before connection machine is even up yet, then don't
+ send signal yet. It will process this event when it comes up. */
+ if (silc_fsm_is_started(&conn->internal->fsm))
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
+ }
+}
/************************** Connection's machine ****************************/
connfsm = &conn->internal->fsm;
silc_fsm_init(connfsm, conn, silc_client_connection_destructor,
fsm, conn->internal->schedule);
- silc_fsm_sema_init(&conn->internal->wait_event, connfsm, 0);
+ silc_fsm_event_init(&conn->internal->wait_event, connfsm);
silc_fsm_start_sync(connfsm, silc_client_connection_st_run);
- /* Schedule any events set in initialization */
+ /* Schedule any events possibly set in initialization */
+ if (conn->internal->disconnected)
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
if (conn->internal->connect)
- SILC_FSM_SEMA_POST(&conn->internal->wait_event);
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
if (conn->internal->key_exchange)
- SILC_FSM_SEMA_POST(&conn->internal->wait_event);
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
/* Wait until this thread is terminated from the machine destructor */
return SILC_FSM_WAIT;
SilcFSMThread thread;
/* Wait for events */
- SILC_FSM_SEMA_WAIT(&conn->internal->wait_event);
+ SILC_FSM_EVENT_WAIT(&conn->internal->wait_event);
/* Process events */
thread = &conn->internal->event_thread;
+ if (conn->internal->disconnected) {
+ /** Event: disconnected */
+ SILC_LOG_DEBUG(("Event: disconnected"));
+ silc_fsm_next(fsm, silc_client_connection_st_close);
+ return SILC_FSM_YIELD;
+ }
+
if (conn->internal->connect) {
SILC_LOG_DEBUG(("Event: connect"));
conn->internal->connect = FALSE;
+ SILC_ASSERT(silc_fsm_is_started(thread) == FALSE);
/*** Event: connect */
silc_fsm_thread_init(thread, &conn->internal->fsm, conn,
if (conn->internal->key_exchange) {
SILC_LOG_DEBUG(("Event: key exchange"));
conn->internal->key_exchange = FALSE;
+ SILC_ASSERT(silc_fsm_is_started(thread) == FALSE);
/*** Event: key exchange */
silc_fsm_thread_init(thread, &conn->internal->fsm, conn,
return SILC_FSM_CONTINUE;
}
- if (conn->internal->disconnected) {
- /** Event: disconnected */
- SILC_LOG_DEBUG(("Event: disconnected"));
- conn->internal->disconnected = FALSE;
- silc_fsm_next(fsm, silc_client_connection_st_close);
+ if (conn->internal->rekeying) {
+ SILC_LOG_DEBUG(("Event: rekey"));
+ conn->internal->rekeying = FALSE;
+ SILC_ASSERT(silc_fsm_is_started(thread) == FALSE);
+
+ /*** Event: rekey */
+ silc_fsm_thread_init(thread, &conn->internal->fsm, conn,
+ NULL, NULL, FALSE);
+ silc_fsm_start_sync(thread, silc_client_st_rekey);
return SILC_FSM_CONTINUE;
}
SILC_FSM_STATE(silc_client_connection_st_packet)
{
+ SilcClientConnection conn = fsm_context;
SilcPacket packet = state_context;
SILC_LOG_DEBUG(("Parsing %s packet", silc_get_packet_name(packet->type)));
case SILC_PACKET_FTP:
/* File transfer packet */
- // silc_client_ftp(client, conn, packet);
+ silc_fsm_next(fsm, silc_client_ftp);
break;
case SILC_PACKET_CHANNEL_KEY:
break;
case SILC_PACKET_KEY_AGREEMENT:
- /* Key agreement */
- // silc_client_key_agreement(client, conn, packet);
+ /** Key agreement */
+ silc_fsm_next(fsm, silc_client_key_agreement);
break;
case SILC_PACKET_COMMAND:
case SILC_PACKET_NEW_ID:
/** New ID */
silc_fsm_next(fsm, silc_client_new_id);
+ break;
case SILC_PACKET_CONNECTION_AUTH_REQUEST:
- /* Reply to connection authentication request to resolve authentication
- method from server. */
- // silc_client_connection_auth_request(client, conn, packet);
+ /** Connection auth resolve reply */
+ silc_fsm_next(fsm, silc_client_connect_auth_request);
+ break;
+
+ case SILC_PACKET_REKEY:
+ /* Signal to start rekey */
+ conn->internal->rekey_responder = TRUE;
+ conn->internal->rekeying = TRUE;
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
+
+ silc_packet_free(packet);
+ return SILC_FSM_FINISH;
break;
default:
return SILC_FSM_CONTINUE;
}
-/* Disconnection even to close remote connection. We close the connection
+/* Disconnection event to close remote connection. We close the connection
and finish the connection machine in this state. The connection context
- is deleted in the machine destructor. The connection callback must be
- already called back to application before getting here. */
+ is deleted in the machine destructor. The connection callback is called
+ in this state if it is set. */
SILC_FSM_STATE(silc_client_connection_st_close)
{
SilcClientConnection conn = fsm_context;
+ SilcClientCommandContext cmd;
+
+ /* Finish running command threads. This will also finish waiting packet
+ thread, as they are always waiting for some command. If any thread is
+ waiting something else than command, they must be finished explicitly. */
+ if (silc_list_count(conn->internal->pending_commands)) {
+ SILC_LOG_DEBUG(("Finish pending commands"));
+ silc_list_start(conn->internal->pending_commands);
+ while ((cmd = silc_list_get(conn->internal->pending_commands))) {
+ if (silc_fsm_is_started(&cmd->thread)) {
+ cmd->verbose = FALSE;
+ silc_fsm_continue_sync(&cmd->thread);
+ }
+ }
- SILC_LOG_DEBUG(("Closing remote connection"));
+ /* Give threads time to finish */
+ return SILC_FSM_YIELD;
+ }
- /* XXX abort any ongoing events (protocols) */
+ /* Abort ongoing event */
+ if (conn->internal->op) {
+ SILC_LOG_DEBUG(("Abort event"));
+ silc_async_abort(conn->internal->op, NULL, NULL);
+ conn->internal->op = NULL;
+ }
- /* Close connection */
- silc_packet_stream_destroy(conn->stream);
+ /* If event thread is running, finish it. */
+ if (silc_fsm_is_started(&conn->internal->event_thread)) {
+ SILC_LOG_DEBUG(("Finish event thread"));
+ silc_fsm_continue_sync(&conn->internal->event_thread);
+ return SILC_FSM_YIELD;
+ }
- SILC_LOG_DEBUG(("Finishing connection machine"));
+ /* Call the connection callback */
+ if (conn->callback)
+ conn->callback(conn->client, conn, conn->internal->status,
+ conn->internal->error, conn->internal->disconnect_message,
+ conn->callback_context);
+ silc_free(conn->internal->disconnect_message);
+
+ SILC_LOG_DEBUG(("Closing remote connection"));
+
+ /* Close connection. */
+ if (conn->stream)
+ silc_packet_stream_destroy(conn->stream);
+ SILC_LOG_DEBUG(("Finishing connection machine"));
return SILC_FSM_FINISH;
}
SILC_FSM_STATE(silc_client_disconnect)
{
SilcClientConnection conn = fsm_context;
- SilcClient client = conn->client;
SilcPacket packet = state_context;
SilcStatus status;
char *message = NULL;
silc_buffer_len(&packet->buffer));
/* Call connection callback */
- conn->callback(client, conn, SILC_CLIENT_CONN_DISCONNECTED, status,
- message, conn->callback_context);
-
- silc_free(message);
- silc_packet_free(packet);
+ conn->internal->status = SILC_CLIENT_CONN_DISCONNECTED;
+ conn->internal->error = status;
+ conn->internal->disconnect_message = message;
/* Signal to close connection */
- conn->internal->disconnected = TRUE;
- SILC_FSM_SEMA_POST(&conn->internal->wait_event);
+ if (!conn->internal->disconnected) {
+ conn->internal->disconnected = TRUE;
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
+ }
+
+ silc_packet_free(packet);
return SILC_FSM_FINISH;
}
SilcClient client = fsm_context;
/* Wait for events */
- SILC_FSM_SEMA_WAIT(&client->internal->wait_event);
+ SILC_FSM_EVENT_WAIT(&client->internal->wait_event);
/* Process events */
- if (client->internal->run_callback && client->internal->ops->running) {
+ if (client->internal->run_callback) {
/* Call running callbcak back to application */
- SILC_LOG_DEBUG(("We are running, call running callback"));
client->internal->run_callback = FALSE;
- client->internal->ops->running(client, client->application);
+ if (client->internal->running) {
+ SILC_LOG_DEBUG(("We are up, call running callback"));
+ client->internal->running(client, client->internal->running_context);
+ }
+ return SILC_FSM_CONTINUE;
+ }
+
+ if (client->internal->connection_closed) {
+ /* A connection finished */
+ SILC_LOG_DEBUG(("Event: connection closed"));
+ client->internal->connection_closed = FALSE;
+ if (silc_atomic_get_int32(&client->internal->conns) == 0 &&
+ client->internal->stop)
+ SILC_FSM_EVENT_SIGNAL(&client->internal->wait_event);
+ return SILC_FSM_CONTINUE;
+ }
+
+ if (client->internal->stop) {
+ /* Stop client libarry. If we have running connections, wait until
+ they finish first. */
+ if (silc_atomic_get_int32(&client->internal->conns) == 0) {
+ SILC_LOG_DEBUG(("Event: stop"));
+ silc_fsm_next(fsm, silc_client_st_stop);
+ }
return SILC_FSM_CONTINUE;
}
return SILC_FSM_CONTINUE;
}
+/* Stop event. Stops the client library. */
+
+SILC_FSM_STATE(silc_client_st_stop)
+{
+ SilcClient client = fsm_context;
+
+ SILC_LOG_DEBUG(("Client stopped"));
+
+ /* Stop scheduler */
+ silc_schedule_stop(client->schedule);
+ silc_client_commands_unregister(client);
+
+ /* Call stopped callback to application */
+ if (client->internal->running)
+ client->internal->running(client, client->internal->running_context);
+
+ return SILC_FSM_FINISH;
+}
+
/******************************* Private API ********************************/
/* Adds new connection. Creates the connection context and returns it. */
-static SilcClientConnection
+SilcClientConnection
silc_client_add_connection(SilcClient client,
SilcConnectionType conn_type,
+ SilcBool connect,
SilcClientConnectionParams *params,
SilcPublicKey public_key,
SilcPrivateKey private_key,
silc_free(conn);
return NULL;
}
+ conn->internal->retry_timer = SILC_CLIENT_RETRY_MIN;
+ silc_mutex_alloc(&conn->internal->lock);
+ silc_atomic_init16(&conn->internal->cmd_ident, 0);
if (!silc_hash_alloc("sha1", &conn->internal->sha1hash)) {
silc_free(conn);
silc_free(conn->internal);
return NULL;
}
+
+ /* Set parameters */
if (params)
conn->internal->params = *params;
+ if (!conn->internal->params.rekey_secs)
+ conn->internal->params.rekey_secs = 3600;
+#ifndef SILC_DIST_INPLACE
+ if (conn->internal->params.rekey_secs < 300)
+ conn->internal->params.rekey_secs = 300;
+#endif /* SILC_DIST_INPLACE */
+
conn->internal->verbose = TRUE;
silc_list_init(conn->internal->pending_commands,
struct SilcClientCommandContextStruct, next);
silc_list_init(conn->internal->thread_pool, SilcFSMThreadStruct, next);
- conn->internal->client_cache = silc_idcache_alloc(0, SILC_ID_CLIENT,
- NULL, NULL);
- conn->internal->channel_cache = silc_idcache_alloc(0, SILC_ID_CHANNEL,
- NULL, NULL);
- conn->internal->server_cache = silc_idcache_alloc(0, SILC_ID_SERVER,
- NULL, NULL);
- if (!conn->internal->client_cache || !conn->internal->channel_cache ||
- !conn->internal->server_cache) {
- silc_client_del_connection(client, conn);
- return NULL;
+ /* Allocate client, channel and serve caches */
+ if (conn_type != SILC_CONN_CLIENT) {
+ conn->internal->client_cache = silc_idcache_alloc(0, SILC_ID_CLIENT,
+ NULL, NULL);
+ conn->internal->channel_cache = silc_idcache_alloc(0, SILC_ID_CHANNEL,
+ NULL, NULL);
+ conn->internal->server_cache = silc_idcache_alloc(0, SILC_ID_SERVER,
+ NULL, NULL);
+ if (!conn->internal->client_cache || !conn->internal->channel_cache ||
+ !conn->internal->server_cache) {
+ silc_client_del_connection(client, conn);
+ return NULL;
+ }
}
- conn->internal->ftp_sessions = silc_dlist_init();
+ if (connect) {
+ /* Initialize our async operation so that application may abort us
+ while we're connecting. */
+ conn->internal->cop = silc_async_alloc(silc_client_connect_abort,
+ NULL, conn);
+ if (!conn->internal->cop) {
+ silc_client_del_connection(client, conn);
+ return NULL;
+ }
+ }
- /* Run the connection state machine. If threads are in use the machine
- is always run in a real thread. */
+ /* Run the connection state machine. If threads are in use the connection
+ machine is always run in a real thread. */
thread = silc_fsm_thread_alloc(&client->internal->fsm, conn,
- silc_client_fsm_destructor, NULL,
+ silc_client_connection_finished, NULL,
client->internal->params->threads);
if (!thread) {
silc_client_del_connection(client, conn);
return NULL;
}
+ silc_fsm_set_state_context(thread, client);
silc_fsm_start(thread, silc_client_connection_st_start);
+ SILC_LOG_DEBUG(("New connection %p", conn));
+ silc_atomic_add_int32(&client->internal->conns, 1);
+
return conn;
}
-/* Removes connection from client. Frees all memory. */
+/* Deletes connection. This is always called from the connection machine
+ destructor. Do not call this directly other places. */
void silc_client_del_connection(SilcClient client, SilcClientConnection conn)
{
-#if 0
- SilcClientConnection c;
- SilcIDCacheList list;
+ SilcList list;
SilcIDCacheEntry entry;
- SilcClientCommandPending *r;
- SilcBool ret;
-
- silc_dlist_start(client->internal->conns);
- while ((c = silc_dlist_get(client->internal->conns)) != SILC_LIST_END) {
- if (c != conn)
- continue;
+ SilcFSMThread thread;
- /* Free all cache entries */
- if (silc_idcache_get_all(conn->internal->client_cache, &list)) {
- ret = silc_idcache_list_first(list, &entry);
- while (ret) {
- silc_client_del_client(client, conn, entry->context);
- ret = silc_idcache_list_next(list, &entry);
- }
- silc_idcache_list_free(list);
- }
+ SILC_LOG_DEBUG(("Freeing connection %p", conn));
- if (silc_idcache_get_all(conn->internal->channel_cache, &list)) {
- ret = silc_idcache_list_first(list, &entry);
- while (ret) {
- silc_client_del_channel(client, conn, entry->context);
- ret = silc_idcache_list_next(list, &entry);
- }
- silc_idcache_list_free(list);
- }
+ silc_schedule_task_del_by_context(conn->internal->schedule, conn);
+ /* Free all cache entries */
+ if (conn->internal->server_cache) {
if (silc_idcache_get_all(conn->internal->server_cache, &list)) {
- ret = silc_idcache_list_first(list, &entry);
- while (ret) {
+ silc_list_start(list);
+ while ((entry = silc_list_get(list)))
silc_client_del_server(client, conn, entry->context);
- ret = silc_idcache_list_next(list, &entry);
- }
- silc_idcache_list_free(list);
}
-
- /* Clear ID caches */
- if (conn->internal->client_cache)
- silc_idcache_free(conn->internal->client_cache);
- if (conn->internal->channel_cache)
- silc_idcache_free(conn->internal->channel_cache);
- if (conn->internal->server_cache)
- silc_idcache_free(conn->internal->server_cache);
-
- /* Free data (my ID is freed in above silc_client_del_client).
- conn->nickname is freed when freeing the local_entry->nickname. */
- silc_free(conn->remote_host);
- silc_free(conn->local_id_data);
- if (conn->internal->send_key)
- silc_cipher_free(conn->internal->send_key);
- if (conn->internal->receive_key)
- silc_cipher_free(conn->internal->receive_key);
- if (conn->internal->hmac_send)
- silc_hmac_free(conn->internal->hmac_send);
- if (conn->internal->hmac_receive)
- silc_hmac_free(conn->internal->hmac_receive);
- silc_free(conn->internal->rekey);
-
- if (conn->internal->active_session) {
- if (conn->sock)
- conn->sock->user_data = NULL;
- silc_client_ftp_session_free(conn->internal->active_session);
- conn->internal->active_session = NULL;
+ }
+ if (conn->internal->channel_cache) {
+ if (silc_idcache_get_all(conn->internal->channel_cache, &list)) {
+ silc_list_start(list);
+ while ((entry = silc_list_get(list))) {
+ silc_client_empty_channel(client, conn, entry->context);
+ silc_client_del_channel(client, conn, entry->context);
+ }
}
-
- silc_client_ftp_free_sessions(client, conn);
-
- if (conn->internal->pending_commands) {
- silc_dlist_start(conn->internal->pending_commands);
- while ((r = silc_dlist_get(conn->internal->pending_commands))
- != SILC_LIST_END)
- silc_dlist_del(conn->internal->pending_commands, r);
- silc_dlist_uninit(conn->internal->pending_commands);
+ }
+ if (conn->internal->client_cache) {
+ if (silc_idcache_get_all(conn->internal->client_cache, &list)) {
+ silc_list_start(list);
+ while ((entry = silc_list_get(list)))
+ silc_client_del_client(client, conn, entry->context);
}
-
- silc_free(conn->internal);
- memset(conn, 0, sizeof(*conn));
- silc_free(conn);
-
- silc_dlist_del(client->internal->conns, conn);
}
-#endif /* 0 */
-}
+ /* Free ID caches */
+ if (conn->internal->client_cache)
+ silc_idcache_free(conn->internal->client_cache);
+ if (conn->internal->channel_cache)
+ silc_idcache_free(conn->internal->channel_cache);
+ if (conn->internal->server_cache)
+ silc_idcache_free(conn->internal->server_cache);
+
+ /* Free thread pool */
+ silc_list_start(conn->internal->thread_pool);
+ while ((thread = silc_list_get(conn->internal->thread_pool)))
+ silc_fsm_free(thread);
+
+ silc_free(conn->remote_host);
+ silc_buffer_free(conn->internal->local_idp);
+ silc_buffer_free(conn->internal->remote_idp);
+ silc_mutex_free(conn->internal->lock);
+ if (conn->internal->hash)
+ silc_hash_free(conn->internal->hash);
+ if (conn->internal->sha1hash)
+ silc_hash_free(conn->internal->sha1hash);
+ silc_atomic_uninit16(&conn->internal->cmd_ident);
+ silc_free(conn->internal->away_message);
+ if (conn->internal->rekey)
+ silc_ske_free_rekey_material(conn->internal->rekey);
+ if (conn->internal->cop)
+ silc_async_free(conn->internal->cop);
+
+ silc_free(conn->internal);
+ memset(conn, 'F', sizeof(*conn));
+ silc_free(conn);
+}
/******************************* Client API *********************************/
to remote SILC server. Performs key exchange also. Returns the
connection context to the connection callback. */
-SilcBool silc_client_connect_to_server(SilcClient client,
- SilcClientConnectionParams *params,
- SilcPublicKey public_key,
- SilcPrivateKey private_key,
- char *remote_host, int port,
- SilcClientConnectCallback callback,
- void *context)
+SilcAsyncOperation
+silc_client_connect_to_server(SilcClient client,
+ SilcClientConnectionParams *params,
+ SilcPublicKey public_key,
+ SilcPrivateKey private_key,
+ char *remote_host, int port,
+ SilcClientConnectCallback callback,
+ void *context)
{
SilcClientConnection conn;
+ SILC_LOG_DEBUG(("Connecting to server"));
+
if (!client || !remote_host)
- return FALSE;
+ return NULL;
+
+ if (client->internal->run_callback) {
+ SILC_LOG_ERROR(("Client library is not started yet. SilcClientRunning "
+ "callback has not been called yet."));
+ return NULL;
+ }
/* Add new connection */
- conn = silc_client_add_connection(client, SILC_CONN_SERVER, params,
+ conn = silc_client_add_connection(client, SILC_CONN_SERVER, TRUE, params,
public_key, private_key, remote_host,
port, callback, context);
if (!conn) {
callback(client, NULL, SILC_CLIENT_CONN_ERROR, 0, NULL, context);
- return FALSE;
+ return NULL;
}
client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_AUDIT,
/* Signal connection machine to start connecting */
conn->internal->connect = TRUE;
- return TRUE;
+ return conn->internal->cop;
}
/* Connects to remote client. Performs key exchange also. Returns the
connection context to the connection callback. */
-SilcBool silc_client_connect_to_client(SilcClient client,
- SilcClientConnectionParams *params,
- SilcPublicKey public_key,
- SilcPrivateKey private_key,
- char *remote_host, int port,
- SilcClientConnectCallback callback,
- void *context)
+SilcAsyncOperation
+silc_client_connect_to_client(SilcClient client,
+ SilcClientConnectionParams *params,
+ SilcPublicKey public_key,
+ SilcPrivateKey private_key,
+ char *remote_host, int port,
+ SilcClientConnectCallback callback,
+ void *context)
{
SilcClientConnection conn;
+ SILC_LOG_DEBUG(("Connecting to client"));
+
if (!client || !remote_host)
- return FALSE;
+ return NULL;
+
+ if (client->internal->run_callback) {
+ SILC_LOG_ERROR(("Client library is not started yet. SilcClientRunning "
+ "callback has not been called yet."));
+ return NULL;
+ }
+
+ if (params)
+ params->no_authentication = TRUE;
/* Add new connection */
- conn = silc_client_add_connection(client, SILC_CONN_CLIENT, params,
+ conn = silc_client_add_connection(client, SILC_CONN_CLIENT, TRUE, params,
public_key, private_key, remote_host,
port, callback, context);
if (!conn) {
callback(client, NULL, SILC_CLIENT_CONN_ERROR, 0, NULL, context);
- return FALSE;
+ return NULL;
}
- client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_AUDIT,
- "Connecting to port %d of client host %s",
- port, remote_host);
-
/* Signal connection machine to start connecting */
conn->internal->connect = TRUE;
- return TRUE;
+ return conn->internal->cop;
}
/* Starts key exchange in the remote stream indicated by `stream'. This
creates the connection context and returns it in the connection callback. */
-SilcBool silc_client_key_exchange(SilcClient client,
- SilcClientConnectionParams *params,
- SilcPublicKey public_key,
- SilcPrivateKey private_key,
- SilcStream stream,
- SilcConnectionType conn_type,
- SilcClientConnectCallback callback,
- void *context)
+SilcAsyncOperation
+silc_client_key_exchange(SilcClient client,
+ SilcClientConnectionParams *params,
+ SilcPublicKey public_key,
+ SilcPrivateKey private_key,
+ SilcStream stream,
+ SilcConnectionType conn_type,
+ SilcClientConnectCallback callback,
+ void *context)
{
SilcClientConnection conn;
const char *host;
SilcUInt16 port;
+ SILC_LOG_DEBUG(("Performing key exchange"));
+
if (!client || !stream)
- return FALSE;
+ return NULL;
- if (!silc_socket_stream_get_info(stream, NULL, &host, NULL, &port))
- return FALSE;
+ if (client->internal->run_callback) {
+ SILC_LOG_ERROR(("Client library is not started yet. SilcClientRunning "
+ "callback has not been called yet."));
+ return NULL;
+ }
+
+ if (!silc_socket_stream_get_info(stream, NULL, &host, NULL, &port)) {
+ SILC_LOG_ERROR(("Socket stream does not have remote host name set"));
+ callback(client, NULL, SILC_CLIENT_CONN_ERROR, 0, NULL, context);
+ return NULL;
+ }
/* Add new connection */
- conn = silc_client_add_connection(client, conn_type, params,
+ conn = silc_client_add_connection(client, conn_type, TRUE, params,
public_key, private_key,
(char *)host, port, callback, context);
if (!conn) {
callback(client, NULL, SILC_CLIENT_CONN_ERROR, 0, NULL, context);
- return FALSE;
+ return NULL;
}
- conn->stream = (void *)stream;
+ conn->internal->user_stream = stream;
/* Signal connection to start key exchange */
conn->internal->key_exchange = TRUE;
- return TRUE;
+ return conn->internal->cop;
}
/* Closes remote connection */
void silc_client_close_connection(SilcClient client,
SilcClientConnection conn)
{
+ SILC_LOG_DEBUG(("Closing connection %p", conn));
-}
-
-#if 0
-/* Finalizes the connection to the remote SILC server. This is called
- after authentication protocol has been completed. This send our
- user information to the server to receive our client ID from
- server. */
-
-SILC_TASK_CALLBACK(silc_client_connect_to_server_final)
-{
- SilcProtocol protocol = (SilcProtocol)context;
- SilcClientConnAuthInternalContext *ctx =
- (SilcClientConnAuthInternalContext *)protocol->context;
- SilcClient client = (SilcClient)ctx->client;
- SilcClientConnection conn = (SilcClientConnection)ctx->sock->user_data;
- SilcBuffer packet;
-
- SILC_LOG_DEBUG(("Start"));
-
- if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
- protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
- /* Error occured during protocol */
- SILC_LOG_DEBUG(("Error during authentication protocol"));
- ctx->status = SILC_CLIENT_CONN_ERROR_AUTH;
- goto err;
- }
-
- if (conn->internal->params.detach_data) {
- /* Send RESUME_CLIENT packet to the server, which is used to resume
- old detached session back. */
- SilcBuffer auth;
- SilcClientID *old_client_id;
- unsigned char *old_id;
- SilcUInt16 old_id_len;
-
- if (!silc_client_process_detach_data(client, conn, &old_id, &old_id_len)) {
- ctx->status = SILC_CLIENT_CONN_ERROR_RESUME;
- goto err;
- }
-
- old_client_id = silc_id_str2id(old_id, old_id_len, SILC_ID_CLIENT);
- if (!old_client_id) {
- silc_free(old_id);
- ctx->status = SILC_CLIENT_CONN_ERROR_RESUME;
- goto err;
- }
-
- /* Generate authentication data that server will verify */
- auth = silc_auth_public_key_auth_generate(client->public_key,
- client->private_key,
- client->rng,
- conn->internal->hash,
- old_client_id, SILC_ID_CLIENT);
- if (!auth) {
- silc_free(old_client_id);
- silc_free(old_id);
- ctx->status = SILC_CLIENT_CONN_ERROR_RESUME;
- goto err;
- }
-
- packet = silc_buffer_alloc_size(2 + old_id_len + auth->len);
- silc_buffer_format(packet,
- SILC_STR_UI_SHORT(old_id_len),
- SILC_STR_UI_XNSTRING(old_id, old_id_len),
- SILC_STR_UI_XNSTRING(auth->data, auth->len),
- SILC_STR_END);
-
- /* Send the packet */
- silc_client_packet_send(client, ctx->sock, SILC_PACKET_RESUME_CLIENT,
- NULL, 0, NULL, NULL,
- packet->data, packet->len, TRUE);
- silc_buffer_free(packet);
- silc_buffer_free(auth);
- silc_free(old_client_id);
- silc_free(old_id);
- } else {
- /* Send NEW_CLIENT packet to the server. We will become registered
- to the SILC network after sending this packet and we will receive
- client ID from the server. */
- packet = silc_buffer_alloc(2 + 2 + strlen(client->username) +
- strlen(client->realname));
- silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
- silc_buffer_format(packet,
- SILC_STR_UI_SHORT(strlen(client->username)),
- SILC_STR_UI_XNSTRING(client->username,
- strlen(client->username)),
- SILC_STR_UI_SHORT(strlen(client->realname)),
- SILC_STR_UI_XNSTRING(client->realname,
- strlen(client->realname)),
- SILC_STR_END);
-
- /* Send the packet */
- silc_client_packet_send(client, ctx->sock, SILC_PACKET_NEW_CLIENT,
- NULL, 0, NULL, NULL,
- packet->data, packet->len, TRUE);
- silc_buffer_free(packet);
- }
-
- /* Save remote ID. */
- conn->remote_id = ctx->dest_id;
- conn->remote_id_data = silc_id_id2str(ctx->dest_id, SILC_ID_SERVER);
- conn->remote_id_data_len = silc_id_get_len(ctx->dest_id, SILC_ID_SERVER);
-
- /* Register re-key timeout */
- conn->internal->rekey->timeout = client->internal->params->rekey_secs;
- conn->internal->rekey->context = (void *)client;
- silc_schedule_task_add(client->schedule, conn->sock->sock,
- silc_client_rekey_callback,
- (void *)conn->sock, conn->internal->rekey->timeout, 0,
- SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
-
- silc_protocol_free(protocol);
- silc_free(ctx->auth_data);
- if (ctx->ske)
- silc_ske_free(ctx->ske);
- silc_socket_free(ctx->sock);
- silc_free(ctx);
- conn->sock->protocol = NULL;
- return;
-
- err:
- silc_protocol_free(protocol);
- silc_free(ctx->auth_data);
- silc_free(ctx->dest_id);
- if (ctx->ske)
- silc_ske_free(ctx->ske);
- conn->sock->protocol = NULL;
- silc_socket_free(ctx->sock);
-
- /* Notify application of failure */
- silc_schedule_task_add(client->schedule, ctx->sock->sock,
- silc_client_connect_failure_auth, ctx,
- 0, 1, SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
-}
-
-/* Client session resuming callback. If the session was resumed
- this callback is called after the resuming is completed. This
- will call the `connect' client operation to the application
- since it has not been called yet. */
-
-static void silc_client_resume_session_cb(SilcClient client,
- SilcClientConnection conn,
- SilcBool success,
- void *context)
-{
- SilcBuffer sidp;
-
- /* Notify application that connection is created to server */
- client->internal->ops->connected(client, conn, success ?
- SILC_CLIENT_CONN_SUCCESS_RESUME :
- SILC_CLIENT_CONN_ERROR_RESUME);
-
- if (success) {
- /* Issue INFO command to fetch the real server name and server
- information and other stuff. */
- silc_client_command_register(client, SILC_COMMAND_INFO, NULL, NULL,
- silc_client_command_reply_info_i, 0,
- ++conn->cmd_ident);
- sidp = silc_id_payload_encode(conn->remote_id, SILC_ID_SERVER);
- silc_client_command_send(client, conn, SILC_COMMAND_INFO,
- conn->cmd_ident, 1, 2, sidp->data, sidp->len);
- silc_buffer_free(sidp);
+ /* Signal to close connection */
+ conn->internal->status = SILC_CLIENT_CONN_DISCONNECTED;
+ if (!conn->internal->disconnected) {
+ conn->internal->disconnected = TRUE;
+ SILC_FSM_EVENT_SIGNAL(&conn->internal->wait_event);
}
}
-/* Processes incoming connection authentication method request packet.
- It is a reply to our previously sent request. The packet can be used
- to resolve the authentication method for the current session if the
- client does not know it beforehand. */
-
-void silc_client_connection_auth_request(SilcClient client,
- SilcClientConnection conn,
- SilcPacketContext *packet)
-{
- SilcClientConnection conn = (SilcClientConnection)sock->user_data;
- SilcUInt16 conn_type, auth_meth;
- int ret;
-
- /* If we haven't send our request then ignore this one. */
- if (!conn->internal->connauth)
- return;
-
- /* Parse the payload */
- ret = silc_buffer_unformat(packet->buffer,
- SILC_STR_UI_SHORT(&conn_type),
- SILC_STR_UI_SHORT(&auth_meth),
- SILC_STR_END);
- if (ret == -1)
- auth_meth = SILC_AUTH_NONE;
-
- /* Call the request callback to notify application for received
- authentication method information. */
- if (conn->internal->connauth->callback)
- (*conn->internal->connauth->callback)(client, conn, auth_meth,
- conn->internal->connauth->context);
-
- silc_schedule_task_del(client->schedule, conn->internal->connauth->timeout);
-
- silc_free(conn->internal->connauth);
- conn->internal->connauth = NULL;
-}
-
-/* Timeout task callback called if the server does not reply to our
- connection authentication method request in the specified time interval. */
-
-SILC_TASK_CALLBACK(silc_client_request_authentication_method_timeout)
-{
- SilcClientConnection conn = (SilcClientConnection)context;
- SilcClient client = conn->client;
-
- if (!conn->internal->connauth)
- return;
-
- /* Call the request callback to notify application */
- if (conn->internal->connauth->callback)
- (*conn->internal->connauth->callback)(client, conn, SILC_AUTH_NONE,
- conn->internal->connauth->context);
-
- silc_free(conn->internal->connauth);
- conn->internal->connauth = NULL;
-}
-
-/* This function can be used to request the current authentication method
- from the server. This may be called when connecting to the server
- and the client library requests the authentication data from the
- application. If the application does not know the current authentication
- method it can request it from the server using this function.
- The `callback' with `context' will be called after the server has
- replied back with the current authentication method. */
-
-void
-silc_client_request_authentication_method(SilcClient client,
- SilcClientConnection conn,
- SilcConnectionAuthRequest callback,
- void *context)
-{
- SilcClientConnAuthRequest connauth;
- SilcBuffer packet;
-
- assert(client && conn);
- connauth = silc_calloc(1, sizeof(*connauth));
- connauth->callback = callback;
- connauth->context = context;
-
- if (conn->internal->connauth)
- silc_free(conn->internal->connauth);
-
- conn->internal->connauth = connauth;
-
- /* Assemble the request packet and send it to the server */
- packet = silc_buffer_alloc(4);
- silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
- silc_buffer_format(packet,
- SILC_STR_UI_SHORT(SILC_SOCKET_TYPE_CLIENT),
- SILC_STR_UI_SHORT(SILC_AUTH_NONE),
- SILC_STR_END);
- silc_client_packet_send(client, conn->sock,
- SILC_PACKET_CONNECTION_AUTH_REQUEST,
- NULL, 0, NULL, NULL,
- packet->data, packet->len, FALSE);
- silc_buffer_free(packet);
-
- /* Register a timeout in case server does not reply anything back. */
- connauth->timeout =
- silc_schedule_task_add(client->schedule, conn->sock->sock,
- silc_client_request_authentication_method_timeout,
- conn,
- client->internal->params->connauth_request_secs, 0,
- SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
-}
-#endif /* 0 */
-
-
/* Allocates new client object. This has to be done before client may
work. After calling this one must call silc_client_init to initialize
the client. The `application' is application specific user data pointer
if (params)
memcpy(new_client->internal->params, params, sizeof(*params));
- if (!new_client->internal->params->task_max)
- new_client->internal->params->task_max = 200;
-
- if (!new_client->internal->params->rekey_secs)
- new_client->internal->params->rekey_secs = 3600;
-
- if (!new_client->internal->params->connauth_request_secs)
- new_client->internal->params->connauth_request_secs = 2;
-
new_client->internal->params->
nickname_format[sizeof(new_client->internal->
params->nickname_format) - 1] = 0;
+ silc_atomic_init32(&new_client->internal->conns, 0);
+
return new_client;
}
void silc_client_free(SilcClient client)
{
- if (client) {
- if (client->rng)
- silc_rng_free(client->rng);
-
- if (!client->internal->params->dont_register_crypto_library) {
- silc_cipher_unregister_all();
- silc_pkcs_unregister_all();
- silc_hash_unregister_all();
- silc_hmac_unregister_all();
- }
-
- silc_free(client->internal->params);
- silc_free(client->internal->silc_client_version);
- silc_free(client->internal);
- silc_free(client);
- }
+ if (client->schedule)
+ silc_schedule_uninit(client->schedule);
+
+ if (client->rng)
+ silc_rng_free(client->rng);
+
+ if (!client->internal->params->dont_register_crypto_library)
+ silc_crypto_uninit();
+
+ if (client->internal->packet_engine)
+ silc_packet_engine_stop(client->internal->packet_engine);
+ if (client->internal->ftp_sessions)
+ silc_dlist_uninit(client->internal->ftp_sessions);
+ if (client->internal->lock)
+ silc_mutex_free(client->internal->lock);
+ silc_atomic_uninit32(&client->internal->conns);
+ silc_free(client->username);
+ silc_free(client->hostname);
+ silc_free(client->realname);
+ silc_free(client->internal->params);
+ silc_free(client->internal->silc_client_version);
+ silc_free(client->internal);
+ silc_free(client);
}
/* Initializes the client. This makes all the necessary steps to make
client. Returns FALSE if error occured, TRUE otherwise. */
SilcBool silc_client_init(SilcClient client, const char *username,
- const char *hostname, const char *realname)
+ const char *hostname, const char *realname,
+ SilcClientRunning running, void *context)
{
SILC_LOG_DEBUG(("Initializing client"));
if (!client)
return FALSE;
- if (!username || !hostname || !realname) {
- SILC_LOG_ERROR(("Username, hostname and realname must be given to "
+ if (!username || !hostname) {
+ SILC_LOG_ERROR(("Username and hostname must be given to "
"silc_client_init"));
return FALSE;
}
+ if (!realname)
+ realname = username;
/* Validate essential strings */
if (!silc_identifier_verify(username, strlen(username),
if (!username || !hostname || !realname)
return FALSE;
- if (!client->internal->params->dont_register_crypto_library) {
+ client->internal->ftp_sessions = silc_dlist_init();
+ if (!client->internal->ftp_sessions)
+ return FALSE;
+
+ if (!client->internal->params->dont_register_crypto_library)
/* Initialize the crypto library. If application has done this already
- this has no effect. Also, we will not be overriding something
- application might have registered earlier. */
- silc_cipher_register_default();
- silc_pkcs_register_default();
- silc_hash_register_default();
- silc_hmac_register_default();
- }
+ this has no effect. */
+ silc_crypto_init(NULL);
/* Initialize random number generator */
client->rng = silc_rng_alloc();
+ if (!client->rng)
+ return FALSE;
silc_rng_init(client->rng);
silc_rng_global_init(client->rng);
/* Initialize the scheduler */
- client->schedule =
- silc_schedule_init(client->internal->params->task_max ?
- client->internal->params->task_max : 0, client);
+ client->schedule = silc_schedule_init(0, client, NULL, NULL);
if (!client->schedule)
return FALSE;
+ /* Allocate client lock */
+ silc_mutex_alloc(&client->internal->lock);
+
+ /* Register commands */
+ silc_client_commands_register(client);
+
/* Start packet engine */
client->internal->packet_engine =
silc_packet_engine_start(client->rng, FALSE, &silc_client_stream_cbs,
if (!client->internal->packet_engine)
return FALSE;
- /* Initialize FSM */
- if (!silc_fsm_init(&client->internal->fsm, client, NULL, NULL,
- client->schedule))
- return FALSE;
- silc_fsm_sema_init(&client->internal->wait_event, &client->internal->fsm, 0);
-
- /* Allocate client lock */
- silc_mutex_alloc(&client->internal->lock);
-
- /* Register commands */
- silc_client_commands_register(client);
-
- /* Start the client machine */
+ /* Initialize and start the client FSM */
+ client->internal->running = running;
+ client->internal->running_context = context;
+ silc_fsm_init(&client->internal->fsm, client, NULL, NULL, client->schedule);
+ silc_fsm_event_init(&client->internal->wait_event, &client->internal->fsm);
silc_fsm_start_sync(&client->internal->fsm, silc_client_st_run);
/* Signal the application when we are running */
client->internal->run_callback = TRUE;
- SILC_FSM_SEMA_POST(&client->internal->wait_event);
+ SILC_FSM_EVENT_SIGNAL(&client->internal->wait_event);
return TRUE;
}
-/* Stops the client. This is called to stop the client and thus to stop
- the program. */
-
-void silc_client_stop(SilcClient client)
-{
- SILC_LOG_DEBUG(("Stopping client"));
-
- silc_schedule_stop(client->schedule);
- silc_schedule_uninit(client->schedule);
- silc_client_commands_unregister(client);
-
- SILC_LOG_DEBUG(("Client stopped"));
-}
-
/* Starts the SILC client FSM machine and blocks here. When this returns
the client has ended. */
silc_schedule(client->schedule);
}
-/* Call scheduler one iteration and return. This cannot be called if threads
- are in use. */
+/* Call scheduler one iteration and return. */
void silc_client_run_one(SilcClient client)
{
- silc_schedule_one(client->schedule, 0);
+ if (silc_fsm_is_started(&client->internal->fsm))
+ silc_schedule_one(client->schedule, 0);
+}
+
+/* Stops the client. This is called to stop the client and thus to stop
+ the program. */
+
+void silc_client_stop(SilcClient client, SilcClientStopped stopped,
+ void *context)
+{
+ SILC_LOG_DEBUG(("Stopping client"));
+
+ if (!silc_fsm_is_started(&client->internal->fsm)) {
+ SILC_LOG_WARNING(("Attempting to stop client library before it has been "
+ "started (silc_client_init not called)"));
+ return;
+ }
+
+ client->internal->running = (SilcClientRunning)stopped;
+ client->internal->running_context = context;
+
+ /* Signal to stop */
+ client->internal->stop = TRUE;
+ SILC_FSM_EVENT_SIGNAL(&client->internal->wait_event);
}
projects / silc.git / blobdiff