/*
- client.c
+ client.c
Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2002 Pekka Riikonen
+ Copyright (C) 1997 - 2006 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
*/
/* $Id$ */
-#include "clientlibincludes.h"
+#include "silc.h"
+#include "silcclient.h"
#include "client_internal.h"
-/* Static task callback prototypes */
-SILC_TASK_CALLBACK(silc_client_connect_to_server_start);
-SILC_TASK_CALLBACK(silc_client_connect_to_server_second);
-SILC_TASK_CALLBACK(silc_client_connect_to_server_final);
-SILC_TASK_CALLBACK(silc_client_rekey_callback);
-SILC_TASK_CALLBACK(silc_client_rekey_final);
-
-static bool silc_client_packet_parse(SilcPacketParserContext *parser_context,
- void *context);
-static void silc_client_packet_parse_type(SilcClient client,
- SilcSocketConnection sock,
- SilcPacketContext *packet);
-void silc_client_resolve_auth_method(bool success,
- SilcProtocolAuthMeth auth_meth,
- const unsigned char *auth_data,
- uint32 auth_data_len, void *context);
+/************************** Types and definitions ***************************/
-/* 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
- and caller must free it. */
+SILC_FSM_STATE(silc_client_connection_st_run);
+SILC_FSM_STATE(silc_client_new_id);
-SilcClient silc_client_alloc(SilcClientOperations *ops,
- SilcClientParams *params,
- void *application,
- const char *silc_version)
+
+/************************ Static utility functions **************************/
+
+/* Packet engine callback to receive a packet */
+
+static SilcBool silc_client_packet_receive(SilcPacketEngine engine,
+ SilcPacketStream stream,
+ SilcPacket packet,
+ void *callback_context,
+ void *stream_context)
{
- SilcClient new_client;
+ SilcClientConnection conn = stream_context;
- new_client = silc_calloc(1, sizeof(*new_client));
- new_client->application = application;
+ /* Packets we do not handle */
+ switch (packet->type) {
+ case SILC_PACKET_HEARTBEAT:
+ case SILC_PACKET_SUCCESS:
+ case SILC_PACKET_FAILURE:
+ case SILC_PACKET_REJECT:
+ 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;
+ }
- new_client->internal = silc_calloc(1, sizeof(*new_client->internal));
- new_client->internal->ops = ops;
- new_client->internal->params =
- silc_calloc(1, sizeof(*new_client->internal->params));
- new_client->internal->silc_client_version = strdup(silc_version);
+ /* Signal packet processor thread for a new packet */
+ conn->internal->new_packet = TRUE;
+ silc_fsm_set_state_context(&conn->internal->packet_thread, packet);
+ silc_fsm_continue_sync(&conn->internal->packet_thread);
- if (params)
- memcpy(new_client->internal->params, params, sizeof(*params));
+ return TRUE;
+}
- if (!new_client->internal->params->task_max)
- new_client->internal->params->task_max = 200;
+/* Packet engine callback to indicate end of stream */
- if (!new_client->internal->params->rekey_secs)
- new_client->internal->params->rekey_secs = 3600;
+static void silc_client_packet_eos(SilcPacketEngine engine,
+ SilcPacketStream stream,
+ void *callback_context,
+ void *stream_context)
+{
+ SILC_LOG_DEBUG(("End of stream received"));
+}
- if (!new_client->internal->params->connauth_request_secs)
- new_client->internal->params->connauth_request_secs = 2;
+/* Packet engine callback to indicate error */
- new_client->internal->params->
- nickname_format[sizeof(new_client->internal->
- params->nickname_format) - 1] = 0;
+static void silc_client_packet_error(SilcPacketEngine engine,
+ SilcPacketStream stream,
+ SilcPacketError error,
+ void *callback_context,
+ void *stream_context)
+{
- return new_client;
}
-/* Frees client object and its internals. */
+/* Packet stream callbacks */
+static SilcPacketCallbacks silc_client_stream_cbs =
+{
+ silc_client_packet_receive,
+ silc_client_packet_eos,
+ silc_client_packet_error
+};
-void silc_client_free(SilcClient client)
+/* FSM destructor */
+
+void silc_client_fsm_destructor(SilcFSM fsm, void *fsm_context,
+ void *destructor_context)
{
- if (client) {
- if (client->rng)
- silc_rng_free(client->rng);
+ silc_fsm_free(fsm);
+}
- silc_free(client->internal->params);
- silc_free(client->internal->silc_client_version);
- silc_free(client->internal);
- silc_free(client);
- }
+
+/************************** Connection's machine ****************************/
+
+/* Start the connection's state machine. If threads are in use the machine
+ is always executed in a real thread. */
+
+SILC_FSM_STATE(silc_client_connection_st_start)
+{
+ SilcClientConnection conn = fsm_context;
+
+ /* Take scheduler for connection */
+ conn->internal->schedule = silc_fsm_get_schedule(fsm);
+
+ /*** Run connection machine */
+ silc_fsm_init(&conn->internal->fsm, conn, NULL, NULL,
+ conn->internal->schedule);
+ silc_fsm_sema_init(&conn->internal->wait_event, &conn->internal->fsm, 0);
+ silc_fsm_start_sync(&conn->internal->fsm, silc_client_connection_st_run);
+
+ /*** Run packet processor FSM thread */
+ silc_fsm_thread_init(&conn->internal->packet_thread, &conn->internal->fsm,
+ conn, silc_client_fsm_destructor, NULL, FALSE);
+ silc_fsm_start_sync(&conn->internal->packet_thread,
+ silc_client_connection_st_packet);
+
+ /* Schedule any events set in initialization */
+ if (conn->internal->connect)
+ SILC_FSM_SEMA_POST(&conn->internal->wait_event);
+ if (conn->internal->key_exchange)
+ SILC_FSM_SEMA_POST(&conn->internal->wait_event);
+
+ /* Wait until this thread is terminated */
+ return SILC_FSM_WAIT;
}
-/* Initializes the client. This makes all the necessary steps to make
- the client ready to be run. One must call silc_client_run to run the
- client. Returns FALSE if error occured, TRUE otherwise. */
+/* Connection machine main state. */
-int silc_client_init(SilcClient client)
+SILC_FSM_STATE(silc_client_connection_st_run)
{
- SILC_LOG_DEBUG(("Initializing client"));
+ SilcClientConnection conn = fsm_context;
- /* Initialize hash functions for client to use */
- silc_hash_alloc("md5", &client->internal->md5hash);
- silc_hash_alloc("sha1", &client->internal->sha1hash);
+ /* Wait for events */
+ SILC_FSM_SEMA_WAIT(&conn->internal->wait_event);
- /* Initialize none cipher */
- silc_cipher_alloc("none", &client->internal->none_cipher);
+ /* Process events */
- /* Initialize random number generator */
- client->rng = silc_rng_alloc();
- silc_rng_init(client->rng);
- silc_rng_global_init(client->rng);
+ if (conn->internal->connect) {
+ SILC_LOG_DEBUG(("Event: connect"));
+ conn->internal->connect = FALSE;
- /* Register protocols */
- silc_client_protocols_register();
+ /** Connect remote host */
+ silc_fsm_thread_init(&conn->internal->event_thread, &conn->internal->fsm,
+ conn, NULL, NULL, FALSE);
+ silc_fsm_start_sync(&conn->internal->event_thread, silc_client_st_connect);
+ return SILC_FSM_CONTINUE;
+ }
- /* Initialize the scheduler */
- client->schedule =
- silc_schedule_init(client->internal->params->task_max ?
- client->internal->params->task_max : 200);
- if (!client->schedule)
- return FALSE;
+ if (conn->internal->key_exchange) {
+ SILC_LOG_DEBUG(("Event: key exchange"));
+ conn->internal->key_exchange = FALSE;
- /* Register commands */
- silc_client_commands_register(client);
+ /** Start key exchange */
+ silc_fsm_thread_init(&conn->internal->event_thread, &conn->internal->fsm,
+ conn, NULL, NULL, FALSE);
+ silc_fsm_start_sync(&conn->internal->event_thread,
+ silc_client_st_connect_key_exchange);
+ return SILC_FSM_CONTINUE;
+ }
- return TRUE;
+ if (conn->internal->disconnected) {
+ SILC_LOG_DEBUG(("Event: disconnected"));
+ conn->internal->disconnected = FALSE;
+
+ return SILC_FSM_CONTINUE;
+ }
+
+ /* NOT REACHED */
+#if defined(SILC_DEBUG)
+ assert(FALSE);
+#endif /* SILC_DEBUG */
+ return SILC_FSM_CONTINUE;
}
-/* Stops the client. This is called to stop the client and thus to stop
- the program. */
+/* Connection's packet processor main state. Packet processor thread waits
+ here for a new packet and processes received packets. */
-void silc_client_stop(SilcClient client)
+SILC_FSM_STATE(silc_client_connection_st_packet)
{
- SILC_LOG_DEBUG(("Stopping client"));
+ SilcClientConnection conn = fsm_context;
+ SilcClient client = conn->client;
+ SilcPacket packet = state_context;
- silc_schedule_stop(client->schedule);
- silc_schedule_uninit(client->schedule);
+ /* Wait for packet to arrive */
+ if (!conn->internal->new_packet) {
+ SILC_LOG_DEBUG(("Wait for packet"));
+ return SILC_FSM_WAIT;
+ }
+ conn->internal->new_packet = FALSE;
- silc_client_protocols_unregister();
- silc_client_commands_unregister(client);
+ SILC_LOG_DEBUG(("Parsing %s packet", silc_get_packet_name(packet->type)));
- SILC_LOG_DEBUG(("Client stopped"));
-}
+ switch (packet->type) {
-/* Runs the client. This starts the scheduler from the utility library.
- When this functions returns the execution of the appliation is over. */
+ case SILC_PACKET_PRIVATE_MESSAGE:
+ /** Private message */
+ silc_fsm_next(fsm, silc_client_private_message);
+ break;
-void silc_client_run(SilcClient client)
-{
- SILC_LOG_DEBUG(("Running client"));
+ case SILC_PACKET_CHANNEL_MESSAGE:
+ /* Channel message */
+ // silc_client_channel_message(client, conn, packet);
+ break;
- /* Start the scheduler, the heart of the SILC client. When this returns
- the program will be terminated. */
- silc_schedule(client->schedule);
+ case SILC_PACKET_FTP:
+ /* File transfer packet */
+ // silc_client_ftp(client, conn, packet);
+ break;
+
+ case SILC_PACKET_CHANNEL_KEY:
+ /* Received channel key */
+ // silc_client_channel_key(client, conn, packet);
+ break;
+
+ case SILC_PACKET_COMMAND_REPLY:
+ /** Command reply */
+ silc_fsm_next(fsm, silc_client_command_reply);
+ break;
+
+ case SILC_PACKET_NOTIFY:
+ /* Notify */
+ // silc_client_notify(client, conn, packet);
+ break;
+
+ case SILC_PACKET_PRIVATE_MESSAGE_KEY:
+ /* Private message key indicator */
+ // silc_client_private_message_key(client, conn, packet);
+ break;
+
+ case SILC_PACKET_DISCONNECT:
+ /* Server disconnects */
+ // silc_client_disconnect(client, conn, packet);
+ break;
+
+ case SILC_PACKET_ERROR:
+ /* Error by server */
+ // silc_client_error(client, conn, packet);
+ break;
+
+ case SILC_PACKET_KEY_AGREEMENT:
+ /* Key agreement */
+ // silc_client_key_agreement(client, conn, packet);
+ break;
+
+ case SILC_PACKET_COMMAND:
+ /** Command packet */
+ silc_fsm_next(fsm, silc_client_command);
+ break;
+
+ case SILC_PACKET_NEW_ID:
+ /** New ID */
+ silc_fsm_next(fsm, silc_client_new_id);
+
+ 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);
+ break;
+
+ default:
+ silc_packet_free(packet);
+ break;
+ }
+
+ return SILC_FSM_CONTINUE;
}
-/* Runs the client and returns immeadiately. This function is used when
- the SILC Client object indicated by the `client' is run under some
- other scheduler, or event loop or main loop. On GUI applications,
- for example this may be desired to use to run the client under the
- GUI application's main loop. Typically the GUI application would
- register an idle task that calls this function multiple times in
- a second to quickly process the SILC specific data. */
-void silc_client_run_one(SilcClient client)
+/*************************** Main client machine ****************************/
+
+/* The client's main state where we wait for various events */
+
+SILC_FSM_STATE(silc_client_st_run)
{
- /* Run the scheduler once. */
- silc_schedule_one(client->schedule, 0);
+ SilcClient client = fsm_context;
+
+ /* Wait for events */
+ SILC_FSM_SEMA_WAIT(&client->internal->wait_event);
+
+ /* Process events */
+
+ if (client->internal->run_callback && client->internal->ops->running) {
+ /* Call running callbcak back to application */
+ client->internal->run_callback = FALSE;
+ client->internal->ops->running(client, client->application);
+ return SILC_FSM_CONTINUE;
+ }
+
+ /* NOT REACHED */
+#if defined(SILC_DEBUG)
+ assert(FALSE);
+#endif /* SILC_DEBUG */
+ return SILC_FSM_CONTINUE;
}
-static void silc_client_entry_destructor(SilcIDCache cache,
- SilcIDCacheEntry entry)
+
+/**************************** Packet Processing *****************************/
+
+/* Received new ID from server during registering to SILC network */
+
+SILC_FSM_STATE(silc_client_new_id)
{
- silc_free(entry->name);
+ SilcClientConnection conn = fsm_context;
+ SilcClient client = conn->client;
+ SilcPacket packet = state_context;
+ SilcID id;
+
+ if (conn->local_id)
+ goto out;
+
+ SILC_LOG_DEBUG(("New ID received from server"));
+
+ if (!silc_id_payload_parse_id(silc_buffer_data(&packet->buffer),
+ silc_buffer_len(&packet->buffer), &id))
+ goto out;
+
+ /* Create local client entry */
+ conn->local_entry = silc_client_add_client(client, conn,
+ (client->nickname ?
+ client->nickname :
+ client->username),
+ client->username,
+ client->realname,
+ &id.u.client_id, 0);
+ if (!conn->local_entry)
+ goto out;
+
+ /* Save the ID */
+ conn->local_id = &conn->local_entry->id;
+ conn->local_idp = silc_buffer_copy(&packet->buffer);
+
+ /* Save cache entry */
+ silc_idcache_find_by_id_one(conn->internal->client_cache, conn->local_id,
+ &conn->internal->local_entry);
+
+ /* Save remote ID */
+ if (packet->src_id_len) {
+ conn->remote_idp = silc_id_payload_encode_data(packet->src_id,
+ packet->src_id_len,
+ packet->src_id_type);
+ if (!conn->remote_idp)
+ goto out;
+ silc_id_payload_parse_id(silc_buffer_data(conn->remote_idp),
+ silc_buffer_len(conn->remote_idp),
+ &conn->remote_id);
+ }
+
+ /* Signal connection that new ID was received so it can continue
+ with the registering. */
+ if (conn->internal->registering)
+ silc_fsm_continue_sync(&conn->internal->event_thread);
+
+ out:
+ /** Packet processed */
+ silc_packet_free(packet);
+ silc_fsm_next(fsm, silc_client_connection_st_packet);
+ return SILC_FSM_CONTINUE;
}
+
+/******************************* Public API *********************************/
+
/* Allocates and adds new connection to the client. This adds the allocated
connection to the connection table and returns a pointer to it. A client
can have multiple connections to multiple servers. Every connection must
be added to the client using this function. User data `context' may
- be sent as argument. This function is normally used only if the
+ be sent as argument. This function is normally used only if the
application performed the connecting outside the library. The library
however may use this internally. */
-SilcClientConnection silc_client_add_connection(SilcClient client,
- char *hostname,
- int port,
- void *context)
+SilcClientConnection
+silc_client_add_connection(SilcClient client,
+ SilcConnectionType conn_type,
+ SilcClientConnectionParams *params,
+ SilcPublicKey public_key,
+ SilcPrivateKey private_key,
+ char *remote_host, int port,
+ SilcClientConnectCallback callback,
+ void *context)
{
SilcClientConnection conn;
- int i;
+ SilcFSMThread thread;
+
+ if (!callback)
+ return NULL;
+
+ SILC_LOG_DEBUG(("Adding new connection to %s:%d", remote_host, port));
conn = silc_calloc(1, sizeof(*conn));
+ if (!conn)
+ return NULL;
+ conn->internal = silc_calloc(1, sizeof(*conn->internal));
+ if (!conn->internal) {
+ silc_free(conn);
+ return NULL;
+ }
- /* Initialize ID caches */
- conn->client_cache = silc_idcache_alloc(0, SILC_ID_CLIENT,
- silc_client_entry_destructor);
- conn->channel_cache = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
- conn->server_cache = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
conn->client = client;
- conn->remote_host = strdup(hostname);
- conn->remote_port = port;
+ conn->public_key = public_key;
+ conn->private_key = private_key;
+ conn->remote_host = strdup(remote_host);
+ conn->remote_port = port ? port : 706;
+ conn->type = conn_type;
+ conn->callback = callback;
conn->context = context;
- conn->pending_commands = silc_dlist_init();
- conn->ftp_sessions = silc_dlist_init();
-
- /* Add the connection to connections table */
- for (i = 0; i < client->internal->conns_count; i++)
- if (client->internal->conns && !client->internal->conns[i]) {
- client->internal->conns[i] = conn;
- return conn;
- }
+ 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);
+ conn->internal->ftp_sessions = silc_dlist_init();
+ conn->internal->verbose = TRUE;
+ silc_list_init(conn->internal->pending_commands,
+ struct SilcClientCommandContextStruct, next);
+
+ if (params) {
+ if (params->detach_data)
+ conn->internal->params.detach_data =
+ silc_memdup(params->detach_data,
+ params->detach_data_len);
+ conn->internal->params.detach_data_len = params->detach_data_len;
+ }
+
+ /* Add the connection to connections list */
+ // silc_dlist_add(client->internal->conns, conn);
- client->internal->conns =
- silc_realloc(client->internal->conns, sizeof(*client->internal->conns)
- * (client->internal->conns_count + 1));
- client->internal->conns[client->internal->conns_count] = conn;
- client->internal->conns_count++;
+ /* Run the connection state machine. If threads are in use the machine
+ is always run in a real thread. */
+ thread = silc_fsm_thread_alloc(&client->internal->fsm, conn,
+ silc_client_fsm_destructor, NULL,
+ client->internal->params->threads);
+ if (!thread) {
+ silc_client_del_connection(client, conn);
+ return NULL;
+ }
+ silc_fsm_start_sync(thread, silc_client_connection_st_start);
return conn;
}
void silc_client_del_connection(SilcClient client, SilcClientConnection conn)
{
- int i;
-
- for (i = 0; i < client->internal->conns_count; i++)
- if (client->internal->conns[i] == conn) {
+#if 0
+ SilcClientConnection c;
+ SilcIDCacheList list;
+ SilcIDCacheEntry entry;
+ SilcClientCommandPending *r;
+ SilcBool ret;
- silc_idcache_free(conn->client_cache);
- silc_idcache_free(conn->channel_cache);
- silc_idcache_free(conn->server_cache);
- if (conn->pending_commands)
- silc_dlist_uninit(conn->pending_commands);
- silc_free(conn->remote_host);
- silc_dlist_uninit(conn->ftp_sessions);
- silc_free(conn);
+ silc_dlist_start(client->internal->conns);
+ while ((c = silc_dlist_get(client->internal->conns)) != SILC_LIST_END) {
+ if (c != conn)
+ continue;
- client->internal->conns[i] = NULL;
+ /* 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);
}
-}
-/* Adds listener socket to the listener sockets table. This function is
- used to add socket objects that are listeners to the client. This should
- not be used to add other connection objects. */
-
-void silc_client_add_socket(SilcClient client, SilcSocketConnection sock)
-{
- int i;
-
- if (!client->internal->sockets) {
- client->internal->sockets =
- silc_calloc(1, sizeof(*client->internal->sockets));
- client->internal->sockets[0] = silc_socket_dup(sock);
- client->internal->sockets_count = 1;
- return;
- }
+ 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);
+ }
- for (i = 0; i < client->internal->sockets_count; i++) {
- if (client->internal->sockets[i] == NULL) {
- client->internal->sockets[i] = silc_socket_dup(sock);
- return;
+ if (silc_idcache_get_all(conn->internal->server_cache, &list)) {
+ ret = silc_idcache_list_first(list, &entry);
+ while (ret) {
+ silc_client_del_server(client, conn, entry->context);
+ ret = silc_idcache_list_next(list, &entry);
+ }
+ silc_idcache_list_free(list);
}
- }
- client->internal->sockets =
- silc_realloc(client->internal->sockets,
- sizeof(*client->internal->sockets) *
- (client->internal->sockets_count + 1));
- client->internal->sockets[client->internal->sockets_count] =
- silc_socket_dup(sock);
- client->internal->sockets_count++;
-}
+ /* 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;
+ }
-/* Deletes listener socket from the listener sockets table. */
+ silc_client_ftp_free_sessions(client, conn);
-void silc_client_del_socket(SilcClient client, SilcSocketConnection sock)
-{
- int i;
+ 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 (!client->internal->sockets)
- return;
+ silc_free(conn->internal);
+ memset(conn, 0, sizeof(*conn));
+ silc_free(conn);
- for (i = 0; i < client->internal->sockets_count; i++) {
- if (client->internal->sockets[i] == sock) {
- silc_socket_free(sock);
- client->internal->sockets[i] = NULL;
- return;
- }
+ silc_dlist_del(client->internal->conns, conn);
}
-}
-
-static int
-silc_client_connect_to_server_internal(SilcClientInternalConnectContext *ctx)
-{
- int sock;
-
- /* XXX In the future we should give up this non-blocking connect all
- together and use threads instead. */
- /* Create connection to server asynchronously */
- sock = silc_net_create_connection_async(NULL, ctx->port, ctx->host);
- if (sock < 0)
- return -1;
-
- /* Register task that will receive the async connect and will
- read the result. */
- ctx->task = silc_schedule_task_add(ctx->client->schedule, sock,
- silc_client_connect_to_server_start,
- (void *)ctx, 0, 0,
- SILC_TASK_FD,
- SILC_TASK_PRI_NORMAL);
- silc_schedule_set_listen_fd(ctx->client->schedule, sock, SILC_TASK_WRITE);
-
- ctx->sock = sock;
-
- return sock;
+#endif /* 0 */
}
/* Connects to remote server. This is the main routine used to connect
- to SILC server. Returns -1 on error and the created socket otherwise.
- The `context' is user context that is saved into the SilcClientConnection
- that is created after the connection is created. Note that application
- may handle the connecting process outside the library. If this is the
- case then this function is not used at all. When the connecting is
- done the `connect' client operation is called. */
-
-int silc_client_connect_to_server(SilcClient client, int port,
- char *host, void *context)
+ to remote SILC server. Returns FALSE on error. */
+
+void silc_client_connect_to_server(SilcClient client,
+ SilcClientConnectionParams *params,
+ SilcPublicKey public_key,
+ SilcPrivateKey private_key,
+ char *remote_host, int port,
+ SilcClientConnectCallback callback,
+ void *context)
{
- SilcClientInternalConnectContext *ctx;
SilcClientConnection conn;
- int sock;
-
- SILC_LOG_DEBUG(("Connecting to port %d of server %s",
- port, host));
-
- conn = silc_client_add_connection(client, host, port, context);
-
- client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_AUDIT,
- "Connecting to port %d of server %s", port, host);
-
- /* Allocate internal context for connection process. This is
- needed as we are doing async connecting. */
- ctx = silc_calloc(1, sizeof(*ctx));
- ctx->client = client;
- ctx->conn = conn;
- ctx->host = strdup(host);
- ctx->port = port;
- ctx->tries = 0;
-
- /* Do the actual connecting process */
- sock = silc_client_connect_to_server_internal(ctx);
- if (sock == -1)
- silc_client_del_connection(client, conn);
- return sock;
-}
-
-/* Socket hostname and IP lookup callback that is called before actually
- starting the key exchange. The lookup is called from the function
- silc_client_start_key_exchange. */
-
-static void silc_client_start_key_exchange_cb(SilcSocketConnection sock,
- void *context)
-{
- SilcClientConnection conn = (SilcClientConnection)context;
- SilcClient client = conn->client;
- SilcProtocol protocol;
- SilcClientKEInternalContext *proto_ctx;
-
- SILC_LOG_DEBUG(("Start"));
- /* XXX We should most likely use the resolved host name instead of the
- one user provided for us. */
- silc_free(conn->sock->hostname);
- conn->sock->hostname = strdup(conn->remote_host);
- if (!conn->sock->ip)
- conn->sock->ip = strdup(conn->remote_host);
- conn->sock->port = conn->remote_port;
+ if (!client || !remote_host)
+ return;
- /* Allocate internal Key Exchange context. This is sent to the
- protocol as context. */
- proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
- proto_ctx->client = (void *)client;
- proto_ctx->sock = silc_socket_dup(conn->sock);
- proto_ctx->rng = client->rng;
- proto_ctx->responder = FALSE;
- proto_ctx->send_packet = silc_client_protocol_ke_send_packet;
- proto_ctx->verify = silc_client_protocol_ke_verify_key;
-
- /* Perform key exchange protocol. silc_client_connect_to_server_final
- will be called after the protocol is finished. */
- silc_protocol_alloc(SILC_PROTOCOL_CLIENT_KEY_EXCHANGE,
- &protocol, (void *)proto_ctx,
- silc_client_connect_to_server_second);
- if (!protocol) {
- client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_ERROR,
- "Error: Could not start key exchange protocol");
- silc_net_close_connection(conn->sock->sock);
- client->internal->ops->connect(client, conn, FALSE);
+ /* Add new connection */
+ conn = silc_client_add_connection(client, SILC_CONN_SERVER, params,
+ public_key, private_key, remote_host,
+ port, callback, context);
+ if (!conn) {
+ callback(client, NULL, SILC_CLIENT_CONN_ERROR, context);
return;
}
- conn->sock->protocol = protocol;
- /* 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_CLIENT_SET_CONNECTION_FOR_OUTPUT,
- later when outgoing data is available. */
- context = (void *)client;
- SILC_CLIENT_REGISTER_CONNECTION_FOR_IO(conn->sock->sock);
+ client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_AUDIT,
+ "Connecting to port %d of server %s",
+ port, remote_host);
- /* Execute the protocol */
- silc_protocol_execute(protocol, client->schedule, 0, 0);
+ /* Signal connection machine to start connecting */
+ conn->internal->connect = TRUE;
}
/* Start SILC Key Exchange (SKE) protocol to negotiate shared secret
void silc_client_start_key_exchange(SilcClient client,
SilcClientConnection conn,
- int fd)
+ SilcStream stream)
{
- /* Allocate new socket connection object */
- silc_socket_alloc(fd, SILC_SOCKET_TYPE_SERVER, (void *)conn, &conn->sock);
-
- /* Sometimes when doing quick reconnects the new socket may be same as
- the old one and there might be pending stuff for the old socket.
- If new one is same then those pending sutff might cause problems.
- Make sure they do not do that. */
- silc_schedule_task_del_by_fd(client->schedule, fd);
+#if 0
+ assert(conn && stream);
+ assert(client->public_key);
+ assert(client->private_key);
conn->nickname = (client->nickname ? strdup(client->nickname) :
strdup(client->username));
+#endif /* 0 */
- /* Resolve the remote hostname and IP address for our socket connection */
- silc_socket_host_lookup(conn->sock, FALSE, silc_client_start_key_exchange_cb,
- conn, client->schedule);
-}
-
-/* Callback called when error has occurred during connecting to the server.
- The `connect' client operation will be called. */
-
-SILC_TASK_CALLBACK(silc_client_connect_failure)
-{
- SilcClientKEInternalContext *ctx =
- (SilcClientKEInternalContext *)context;
- SilcClient client = (SilcClient)ctx->client;
-
- client->internal->ops->connect(client, ctx->sock->user_data, FALSE);
- if (ctx->packet)
- silc_packet_context_free(ctx->packet);
- silc_free(ctx);
-}
-
-/* Start of the connection to the remote server. This is called after
- succesful TCP/IP connection has been established to the remote host. */
-
-SILC_TASK_CALLBACK(silc_client_connect_to_server_start)
-{
- SilcClientInternalConnectContext *ctx =
- (SilcClientInternalConnectContext *)context;
- SilcClient client = ctx->client;
- SilcClientConnection conn = ctx->conn;
- int opt, opt_len = sizeof(opt);
-
- SILC_LOG_DEBUG(("Start"));
-
- /* Check the socket status as it might be in error */
- silc_net_get_socket_opt(fd, SOL_SOCKET, SO_ERROR, &opt, &opt_len);
- if (opt != 0) {
- if (ctx->tries < 2) {
- /* Connection failed but lets try again */
- client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_ERROR,
- "Could not connect to server %s: %s",
- ctx->host, strerror(opt));
- client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_AUDIT,
- "Connecting to port %d of server %s resumed",
- ctx->port, ctx->host);
-
- /* Unregister old connection try */
- silc_schedule_unset_listen_fd(client->schedule, fd);
- silc_net_close_connection(fd);
- silc_schedule_task_del(client->schedule, ctx->task);
-
- /* Try again */
- silc_client_connect_to_server_internal(ctx);
- ctx->tries++;
- } else {
- /* Connection failed and we won't try anymore */
- client->internal->ops->say(client, conn, SILC_CLIENT_MESSAGE_ERROR,
- "Could not connect to server %s: %s",
- ctx->host, strerror(opt));
- silc_schedule_unset_listen_fd(client->schedule, fd);
- silc_net_close_connection(fd);
- silc_schedule_task_del(client->schedule, ctx->task);
- silc_free(ctx);
-
- /* Notify application of failure */
- client->internal->ops->connect(client, conn, FALSE);
- silc_client_del_connection(client, conn);
- }
- return;
- }
-
- silc_schedule_unset_listen_fd(client->schedule, fd);
- silc_schedule_task_del(client->schedule, ctx->task);
- silc_free(ctx);
-
- silc_client_start_key_exchange(client, conn, fd);
-}
-
-/* Second part of the connecting to the server. This executed
- authentication protocol. */
-
-SILC_TASK_CALLBACK(silc_client_connect_to_server_second)
-{
- SilcProtocol protocol = (SilcProtocol)context;
- SilcClientKEInternalContext *ctx =
- (SilcClientKEInternalContext *)protocol->context;
- SilcClient client = (SilcClient)ctx->client;
- SilcSocketConnection sock = NULL;
- SilcClientConnAuthInternalContext *proto_ctx;
-
- 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 KE protocol"));
- silc_protocol_free(protocol);
- silc_ske_free_key_material(ctx->keymat);
- if (ctx->ske)
- silc_ske_free(ctx->ske);
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
- ctx->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, ctx,
- 0, 1, SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
- 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. */
- silc_client_protocol_ke_set_keys(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_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->client = (void *)client;
- proto_ctx->sock = sock = ctx->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;
-
- /* Free old protocol as it is finished now */
- silc_protocol_free(protocol);
- if (ctx->packet)
- silc_packet_context_free(ctx->packet);
- silc_free(ctx);
- sock->protocol = NULL;
+ /* Start */
- /* Resolve the authentication method to be used in this connection. The
- completion callback is called after the application has resolved
- the authentication method. */
- client->internal->ops->get_auth_method(client, sock->user_data,
- sock->hostname,
- sock->port,
- silc_client_resolve_auth_method,
- proto_ctx);
}
+#if 0
/* Authentication method resolving callback. Application calls this function
- after we've called the client->internal->ops->get_auth_method
+ after we've called the client->internal->ops->get_auth_method
client operation to resolve the authentication method. We will continue
the executiong of the protocol in this function. */
-void silc_client_resolve_auth_method(bool success,
+void silc_client_resolve_auth_method(SilcBool success,
SilcProtocolAuthMeth auth_meth,
const unsigned char *auth_data,
- uint32 auth_data_len, void *context)
+ SilcUInt32 auth_data_len, void *context)
{
SilcClientConnAuthInternalContext *proto_ctx =
(SilcClientConnAuthInternalContext *)context;
proto_ctx->auth_meth = auth_meth;
- if (auth_data && auth_data_len) {
- proto_ctx->auth_data = silc_calloc(auth_data_len, sizeof(*auth_data));
- memcpy(proto_ctx->auth_data, auth_data, auth_data_len);
+ if (success && auth_data && auth_data_len) {
+
+ /* Passphrase must be UTF-8 encoded, if it isn't encode it */
+ if (auth_meth == SILC_AUTH_PASSWORD &&
+ !silc_utf8_valid(auth_data, auth_data_len)) {
+ int payload_len = 0;
+ unsigned char *autf8 = NULL;
+ payload_len = silc_utf8_encoded_len(auth_data, auth_data_len,
+ SILC_STRING_ASCII);
+ autf8 = silc_calloc(payload_len, sizeof(*autf8));
+ auth_data_len = silc_utf8_encode(auth_data, auth_data_len,
+ SILC_STRING_ASCII, autf8, payload_len);
+ auth_data = autf8;
+ }
+
+ proto_ctx->auth_data = silc_memdup(auth_data, auth_data_len);
proto_ctx->auth_data_len = auth_data_len;
}
/* Allocate the authenteication protocol and execute it. */
- silc_protocol_alloc(SILC_PROTOCOL_CLIENT_CONNECTION_AUTH,
- &proto_ctx->sock->protocol, (void *)proto_ctx,
+ silc_protocol_alloc(SILC_PROTOCOL_CLIENT_CONNECTION_AUTH,
+ &proto_ctx->sock->protocol, (void *)proto_ctx,
silc_client_connect_to_server_final);
/* Execute the protocol */
SILC_TASK_CALLBACK(silc_client_connect_to_server_final)
{
SilcProtocol protocol = (SilcProtocol)context;
- SilcClientConnAuthInternalContext *ctx =
+ SilcClientConnAuthInternalContext *ctx =
(SilcClientConnAuthInternalContext *)protocol->context;
SilcClient client = (SilcClient)ctx->client;
SilcClientConnection conn = (SilcClientConnection)ctx->sock->user_data;
protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
/* Error occured during protocol */
SILC_LOG_DEBUG(("Error during authentication protocol"));
- silc_protocol_free(protocol);
- if (ctx->auth_data)
- silc_free(ctx->auth_data);
- if (ctx->ske)
- silc_ske_free(ctx->ske);
- if (ctx->dest_id)
- silc_free(ctx->dest_id);
- 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, ctx,
- 0, 1, SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
- return;
+ ctx->status = SILC_CLIENT_CONN_ERROR_AUTH;
+ goto err;
}
- /* 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);
+ 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;
+ }
- /* 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);
+ 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_len = silc_id_get_len(ctx->dest_id, SILC_ID_SERVER);
/* Register re-key timeout */
- conn->rekey->timeout = client->internal->params->rekey_secs;
- conn->rekey->context = (void *)client;
- silc_schedule_task_add(client->schedule, conn->sock->sock,
+ 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->rekey->timeout, 0,
+ (void *)conn->sock, conn->internal->rekey->timeout, 0,
SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
silc_protocol_free(protocol);
- if (ctx->auth_data)
- silc_free(ctx->auth_data);
+ 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;
-}
-
-/* Internal routine that sends packet or marks packet to be sent. This
- is used directly only in special cases. Normal cases should use
- silc_server_packet_send. Returns < 0 on error. */
+ return;
-int silc_client_packet_send_real(SilcClient client,
- SilcSocketConnection sock,
- bool force_send)
-{
- int ret;
-
- /* If rekey protocol is active we must assure that all packets are
- sent through packet queue. */
- if (SILC_CLIENT_IS_REKEY(sock))
- force_send = FALSE;
-
- /* If outbound data is already pending do not force send */
- if (SILC_IS_OUTBUF_PENDING(sock))
- force_send = FALSE;
-
- /* Send the packet */
- ret = silc_packet_send(sock, force_send);
- if (ret != -2)
- return ret;
-
- /* Mark that there is some outgoing data available for this connection.
- This call sets the connection both for input and output (the input
- is set always and this call keeps the input setting, actually).
- Actual data sending is performed by silc_client_packet_process. */
- SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT(client->schedule, sock->sock);
-
- /* Mark to socket that data is pending in outgoing buffer. This flag
- is needed if new data is added to the buffer before the earlier
- put data is sent to the network. */
- SILC_SET_OUTBUF_PENDING(sock);
+ 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);
- return 0;
+ /* 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);
}
/* Packet processing callback. This is used to send and receive packets
SILC_TASK_CALLBACK_GLOBAL(silc_client_packet_process)
{
SilcClient client = (SilcClient)context;
- SilcSocketConnection sock = NULL;
+ SilcClientConnection conn = NULL;
SilcClientConnection conn;
int ret;
if (SILC_IS_DISCONNECTED(sock))
return;
- if (sock->outbuf->data - sock->outbuf->head)
- silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
-
ret = silc_packet_send(sock, TRUE);
/* If returned -2 could not write to connection now, will do
/* Error */
if (ret == -1)
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.
+ 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_CLIENT_SET_CONNECTION_FOR_INPUT(client->schedule, fd);
SILC_UNSET_OUTBUF_PENDING(sock);
ret = silc_packet_receive(sock);
if (ret < 0)
return;
-
+
/* EOF */
if (ret == 0) {
SILC_LOG_DEBUG(("Read EOF"));
close the connection */
if (SILC_IS_DISCONNECTING(sock)) {
if (sock == conn->sock && sock->type != SILC_SOCKET_TYPE_CLIENT)
- client->internal->ops->disconnect(client, conn);
- silc_client_close_connection(client, sock, conn);
+ client->internal->ops->disconnected(client, conn, 0, NULL);
+ silc_client_close_connection_real(client, sock, conn);
return;
}
-
+
SILC_LOG_DEBUG(("EOF from connection %d", sock->sock));
if (sock == conn->sock && sock->type != SILC_SOCKET_TYPE_CLIENT)
- client->internal->ops->disconnect(client, conn);
- silc_client_close_connection(client, sock, conn);
+ client->internal->ops->disconnected(client, conn, 0, NULL);
+ silc_client_close_connection_real(client, sock, conn);
return;
}
/* Process the packet. This will call the parser that will then
decrypt and parse the packet. */
if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
- silc_packet_receive_process(sock, FALSE, conn->receive_key,
- conn->hmac_receive, conn->psn_receive,
+ silc_packet_receive_process(sock, FALSE, conn->internal->receive_key,
+ conn->internal->hmac_receive,
+ conn->internal->psn_receive,
silc_client_packet_parse, client);
else
- silc_packet_receive_process(sock, FALSE, NULL, NULL, 0,
+ silc_packet_receive_process(sock, FALSE, NULL, NULL, 0,
silc_client_packet_parse, client);
}
}
/* Parser callback called by silc_packet_receive_process. Thie merely
registers timeout that will handle the actual parsing when appropriate. */
-static bool silc_client_packet_parse(SilcPacketParserContext *parser_context,
+static SilcBool silc_client_packet_parse(SilcPacketParserContext *parser_context,
void *context)
{
SilcClient client = (SilcClient)context;
- SilcSocketConnection sock = parser_context->sock;
+ SilcClientConnection conn = parser_context->sock;
SilcClientConnection conn = (SilcClientConnection)sock->user_data;
SilcPacketContext *packet = parser_context->packet;
SilcPacketType ret;
- if (conn && conn->hmac_receive && conn->sock == sock)
- conn->psn_receive = parser_context->packet->sequence + 1;
+ if (conn && conn->internal->hmac_receive && conn->sock == sock)
+ conn->internal->psn_receive = parser_context->packet->sequence + 1;
/* Parse the packet immediately */
if (parser_context->normal)
- ret = silc_packet_parse(packet, conn->receive_key);
+ ret = silc_packet_parse(packet, conn->internal->receive_key);
else
- ret = silc_packet_parse_special(packet, conn->receive_key);
+ ret = silc_packet_parse_special(packet, conn->internal->receive_key);
if (ret == SILC_PACKET_NONE) {
silc_packet_context_free(packet);
silc_free(parser_context);
return FALSE;
}
-
+
/* 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 ((ret == SILC_PACKET_REKEY || ret == SILC_PACKET_REKEY_DONE) ||
- (sock->protocol && sock->protocol->protocol &&
- (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
- sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY))) {
+ if (sock->protocol && sock->protocol->protocol &&
+ (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
+ sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
/* Parse the incoming packet type */
- silc_client_packet_parse_type(client, sock, packet);
- silc_packet_context_free(packet);
- silc_free(parser_context);
-
- /* Reprocess the buffer since we'll return FALSE. This is because
- the `conn->receive_key' might have become valid by processing
- the previous packet */
- if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
- silc_packet_receive_process(sock, FALSE, conn->receive_key,
- conn->hmac_receive, conn->psn_receive,
- silc_client_packet_parse, client);
- else
- silc_packet_receive_process(sock, FALSE, NULL, NULL, 0,
- silc_client_packet_parse, client);
-
- return FALSE;
- }
-
- /* Parse the incoming packet type */
- silc_client_packet_parse_type(client, sock, packet);
- silc_packet_context_free(packet);
- silc_free(parser_context);
- return TRUE;
-}
-
-/* Parses the packet type and calls what ever routines the packet type
- requires. This is done for all incoming packets. */
-
-void silc_client_packet_parse_type(SilcClient client,
- SilcSocketConnection sock,
- SilcPacketContext *packet)
-{
- SilcBuffer buffer = packet->buffer;
- SilcPacketType type = packet->type;
-
- SILC_LOG_DEBUG(("Parsing packet type %d", type));
-
- /* Parse the packet type */
- switch(type) {
- case SILC_PACKET_DISCONNECT:
- silc_client_disconnected_by_server(client, sock, buffer);
- break;
- case SILC_PACKET_SUCCESS:
- /*
- * Success received for something. For now we can have only
- * one protocol for connection executing at once hence this
- * success message is for whatever protocol is executing currently.
- */
- if (sock->protocol)
- silc_protocol_execute(sock->protocol, client->schedule, 0, 0);
- break;
- case SILC_PACKET_FAILURE:
- /*
- * Failure received for some protocol. Set the protocol state to
- * error and call the protocol callback. This fill cause error on
- * protocol and it will call the final callback.
- */
- silc_client_process_failure(client, sock, packet);
- break;
- case SILC_PACKET_REJECT:
- break;
-
- case SILC_PACKET_NOTIFY:
- /*
- * Received notify message
- */
- silc_client_notify_by_server(client, sock, packet);
- break;
-
- case SILC_PACKET_ERROR:
- /*
- * Received error message
- */
- silc_client_error_by_server(client, sock, buffer);
- break;
-
- case SILC_PACKET_CHANNEL_MESSAGE:
- /*
- * Received message to (from, actually) a channel
- */
- silc_client_channel_message(client, sock, packet);
- break;
- case SILC_PACKET_CHANNEL_KEY:
- /*
- * Received key for a channel. By receiving this key the client will be
- * able to talk to the channel it has just joined. This can also be
- * a new key for existing channel as keys expire peridiocally.
- */
- silc_client_receive_channel_key(client, sock, buffer);
- break;
-
- case SILC_PACKET_PRIVATE_MESSAGE:
- /*
- * Received private message
- */
- silc_client_private_message(client, sock, packet);
- break;
- case SILC_PACKET_PRIVATE_MESSAGE_KEY:
- /*
- * Received private message key
- */
- break;
-
- case SILC_PACKET_COMMAND_REPLY:
- /*
- * Recived reply for a command
- */
- silc_client_command_reply_process(client, sock, packet);
- break;
-
- case SILC_PACKET_KEY_EXCHANGE:
- if (sock->protocol && sock->protocol->protocol &&
- sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE) {
- SilcClientKEInternalContext *proto_ctx =
- (SilcClientKEInternalContext *)sock->protocol->context;
-
- 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, client->schedule, 0, 0);
- } else {
- SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
- "protocol active, packet dropped."));
- }
- break;
-
- case SILC_PACKET_KEY_EXCHANGE_1:
- if (sock->protocol && sock->protocol->protocol &&
- (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
- sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
-
- if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
- SilcClientRekeyInternalContext *proto_ctx =
- (SilcClientRekeyInternalContext *)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, client->schedule, 0, 0);
- } else {
- SilcClientKEInternalContext *proto_ctx =
- (SilcClientKEInternalContext *)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, client->schedule, 0, 0);
- }
- } else {
- SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
- "protocol active, packet dropped."));
- }
- break;
- case SILC_PACKET_KEY_EXCHANGE_2:
- if (sock->protocol && sock->protocol->protocol &&
- (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
- sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
-
- if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
- SilcClientRekeyInternalContext *proto_ctx =
- (SilcClientRekeyInternalContext *)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, client->schedule, 0, 0);
- } else {
- SilcClientKEInternalContext *proto_ctx =
- (SilcClientKEInternalContext *)sock->protocol->context;
-
- if (proto_ctx->packet)
- silc_packet_context_free(proto_ctx->packet);
- if (proto_ctx->dest_id)
- silc_free(proto_ctx->dest_id);
- 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, client->schedule, 0, 0);
- }
- } else {
- SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
- "protocol active, packet dropped."));
- }
- break;
-
- case SILC_PACKET_NEW_ID:
- {
- /*
- * Received new ID from server. This packet is received at
- * the connection to the server. New ID is also received when
- * user changes nickname but in that case the new ID is received
- * as command reply and not as this packet type.
- */
- SilcIDPayload idp;
-
- idp = silc_id_payload_parse(buffer->data, buffer->len);
- if (!idp)
- break;
- if (silc_id_payload_get_type(idp) != SILC_ID_CLIENT)
- break;
-
- silc_client_receive_new_id(client, sock, idp);
- silc_id_payload_free(idp);
- break;
- }
-
- case SILC_PACKET_HEARTBEAT:
- /*
- * Received heartbeat packet
- */
- SILC_LOG_DEBUG(("Heartbeat packet"));
- break;
-
- case SILC_PACKET_KEY_AGREEMENT:
- /*
- * Received key agreement packet
- */
- SILC_LOG_DEBUG(("Key agreement packet"));
- silc_client_key_agreement(client, sock, packet);
- break;
-
- case SILC_PACKET_REKEY:
- SILC_LOG_DEBUG(("Re-key packet"));
- /* We ignore this for now */
- break;
-
- case SILC_PACKET_REKEY_DONE:
- SILC_LOG_DEBUG(("Re-key done packet"));
-
- if (sock->protocol && sock->protocol->protocol &&
- sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
-
- SilcClientRekeyInternalContext *proto_ctx =
- (SilcClientRekeyInternalContext *)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 */
- if (proto_ctx->responder == FALSE)
- silc_protocol_execute(sock->protocol, client->schedule, 0, 0);
- else
- /* Let the protocol handle the packet */
- silc_protocol_execute(sock->protocol, client->schedule,
- 0, 100000);
- } else {
- SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
- "protocol active, packet dropped."));
- }
- break;
-
- case SILC_PACKET_CONNECTION_AUTH_REQUEST:
- /*
- * Reveived reply to our connection authentication method request
- * packet. This is used to resolve the authentication method for the
- * current session from the server if the client does not know it.
- */
- silc_client_connection_auth_request(client, sock, packet);
- break;
-
- case SILC_PACKET_FTP:
- /* Received file transfer packet. */
- silc_client_ftp(client, sock, packet);
- break;
-
- default:
- SILC_LOG_DEBUG(("Incorrect packet type %d, packet dropped", type));
- break;
- }
-}
-
-/* Sends packet. This doesn't actually send the packet instead it assembles
- it and marks it to be sent. However, if force_send is TRUE the packet
- is sent immediately. if dst_id, cipher and hmac are NULL those parameters
- will be derived from sock argument. Otherwise the valid arguments sent
- are used. */
-
-void silc_client_packet_send(SilcClient client,
- SilcSocketConnection sock,
- SilcPacketType type,
- void *dst_id,
- SilcIdType dst_id_type,
- SilcCipher cipher,
- SilcHmac hmac,
- unsigned char *data,
- uint32 data_len,
- int force_send)
-{
- SilcPacketContext packetdata;
- int block_len;
- uint32 sequence = 0;
-
- if (!sock)
- return;
-
- SILC_LOG_DEBUG(("Sending packet, type %d", type));
-
- /* Get data used in the packet sending, keys and stuff */
- if ((!cipher || !hmac || !dst_id) && sock->user_data) {
- if (!cipher && ((SilcClientConnection)sock->user_data)->send_key)
- cipher = ((SilcClientConnection)sock->user_data)->send_key;
-
- if (!hmac && ((SilcClientConnection)sock->user_data)->hmac_send)
- hmac = ((SilcClientConnection)sock->user_data)->hmac_send;
-
- if (!dst_id && ((SilcClientConnection)sock->user_data)->remote_id) {
- dst_id = ((SilcClientConnection)sock->user_data)->remote_id;
- dst_id_type = SILC_ID_SERVER;
- }
-
- if (hmac)
- sequence = ((SilcClientConnection)sock->user_data)->psn_send++;
- }
-
- block_len = cipher ? silc_cipher_get_block_len(cipher) : 0;
-
- /* Set the packet context pointers */
- packetdata.flags = 0;
- packetdata.type = type;
- if (sock->user_data &&
- ((SilcClientConnection)sock->user_data)->local_id_data) {
- packetdata.src_id = ((SilcClientConnection)sock->user_data)->local_id_data;
- packetdata.src_id_len =
- silc_id_get_len(((SilcClientConnection)sock->user_data)->local_id,
- SILC_ID_CLIENT);
- } else {
- packetdata.src_id = silc_calloc(SILC_ID_CLIENT_LEN, sizeof(unsigned char));
- packetdata.src_id_len = SILC_ID_CLIENT_LEN;
- }
- packetdata.src_id_type = SILC_ID_CLIENT;
- if (dst_id) {
- packetdata.dst_id = silc_id_id2str(dst_id, dst_id_type);
- packetdata.dst_id_len = silc_id_get_len(dst_id, dst_id_type);
- packetdata.dst_id_type = dst_id_type;
- } else {
- packetdata.dst_id = NULL;
- packetdata.dst_id_len = 0;
- packetdata.dst_id_type = SILC_ID_NONE;
- }
- packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
- packetdata.src_id_len + packetdata.dst_id_len;
- packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen, block_len);
-
- /* Prepare outgoing data buffer for packet sending */
- silc_packet_send_prepare(sock,
- SILC_PACKET_HEADER_LEN +
- packetdata.src_id_len +
- packetdata.dst_id_len,
- packetdata.padlen,
- data_len);
-
- SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
-
- packetdata.buffer = sock->outbuf;
-
- /* Put the data to the buffer */
- if (data && data_len)
- silc_buffer_put(sock->outbuf, data, data_len);
-
- /* Create the outgoing packet */
- silc_packet_assemble(&packetdata, cipher);
-
- /* Encrypt the packet */
- if (cipher)
- silc_packet_encrypt(cipher, hmac, sequence, sock->outbuf,
- sock->outbuf->len);
-
- SILC_LOG_HEXDUMP(("Packet (%d), len %d", sequence, sock->outbuf->len),
- sock->outbuf->data, sock->outbuf->len);
-
- /* Now actually send the packet */
- silc_client_packet_send_real(client, sock, force_send);
-}
+ silc_client_packet_parse_type(client, sock, packet);
-void silc_client_packet_queue_purge(SilcClient client,
- SilcSocketConnection sock)
-{
- if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
- (SILC_IS_DISCONNECTED(sock) == FALSE)) {
- if (sock->outbuf->data - sock->outbuf->head)
- silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
+ /* Reprocess the buffer since we'll return FALSE. This is because
+ the `conn->internal->receive_key' might have become valid by processing
+ the previous packet */
+ if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
+ silc_packet_receive_process(sock, FALSE, conn->internal->receive_key,
+ conn->internal->hmac_receive,
+ conn->internal->psn_receive,
+ silc_client_packet_parse, client);
+ else
+ silc_packet_receive_process(sock, FALSE, NULL, NULL, 0,
+ silc_client_packet_parse, client);
- silc_packet_send(sock, TRUE);
+ silc_packet_context_free(packet);
+ silc_free(parser_context);
- SILC_CLIENT_SET_CONNECTION_FOR_INPUT(client->schedule, sock->sock);
- SILC_UNSET_OUTBUF_PENDING(sock);
- silc_buffer_clear(sock->outbuf);
+ return FALSE;
}
+
+ /* Parse the incoming packet type */
+ silc_client_packet_parse_type(client, sock, packet);
+ silc_packet_context_free(packet);
+ silc_free(parser_context);
+ return TRUE;
}
+#endif /* 0 */
/* Closes connection to remote end. Free's all allocated data except
- for some information such as nickname etc. that are valid at all time.
+ for some information such as nickname etc. that are valid at all time.
If the `sock' is NULL then the conn->sock will be used. If `sock' is
provided it will be checked whether the sock and `conn->sock' are the
same (they can be different, ie. a socket can use `conn' as its
connection but `conn->sock' might be actually a different connection
than the `sock'). */
-void silc_client_close_connection(SilcClient client,
- SilcSocketConnection sock,
- SilcClientConnection conn)
+#if 0
+void silc_client_close_connection_real(SilcClient client,
+ SilcClientConnection conn)
{
int del = FALSE;
SILC_LOG_DEBUG(("Start"));
+ if (!sock && !conn)
+ return;
+
if (!sock || (sock && conn->sock == sock))
del = TRUE;
if (!sock)
sock = conn->sock;
+ if (!sock) {
+ if (del && conn)
+ silc_client_del_connection(client, conn);
+ return;
+ }
+
/* We won't listen for this connection anymore */
silc_schedule_unset_listen_fd(client->schedule, sock->sock);
/* Unregister all tasks */
silc_schedule_task_del_by_fd(client->schedule, sock->sock);
- silc_schedule_task_del_by_fd(client->schedule, sock->sock);
/* Close the actual connection */
silc_net_close_connection(sock->sock);
/* Cancel any active protocol */
if (sock->protocol) {
- if (sock->protocol->protocol->type ==
+ if (sock->protocol->protocol->type ==
SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
- sock->protocol->protocol->type ==
+ sock->protocol->protocol->type ==
SILC_PROTOCOL_CLIENT_CONNECTION_AUTH) {
sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
silc_protocol_execute_final(sock->protocol, client->schedule);
/* The application will recall this function with these protocols
- (the ops->connect client operation). */
+ (the ops->connected client operation). */
return;
} else {
sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
}
/* Free everything */
- if (del && sock->user_data) {
- /* Free all cache entries */
- SilcIDCacheList list;
- SilcIDCacheEntry entry;
- bool ret;
-
- if (silc_idcache_get_all(conn->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);
- }
-
- if (silc_idcache_get_all(conn->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);
- }
-
- if (silc_idcache_get_all(conn->server_cache, &list)) {
- ret = silc_idcache_list_first(list, &entry);
- while (ret) {
- 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->client_cache)
- silc_idcache_free(conn->client_cache);
- if (conn->channel_cache)
- silc_idcache_free(conn->channel_cache);
- if (conn->server_cache)
- silc_idcache_free(conn->server_cache);
-
- /* Free data (my ID is freed in above silc_client_del_client) */
- if (conn->nickname)
- silc_free(conn->nickname);
- if (conn->remote_host)
- silc_free(conn->remote_host);
- if (conn->local_id_data)
- silc_free(conn->local_id_data);
- if (conn->send_key)
- silc_cipher_free(conn->send_key);
- if (conn->receive_key)
- silc_cipher_free(conn->receive_key);
- if (conn->hmac_send)
- silc_hmac_free(conn->hmac_send);
- if (conn->hmac_receive)
- silc_hmac_free(conn->hmac_receive);
- if (conn->pending_commands)
- silc_dlist_uninit(conn->pending_commands);
- if (conn->rekey)
- silc_free(conn->rekey);
-
- if (conn->active_session) {
- sock->user_data = NULL;
- silc_client_ftp_session_free(conn->active_session);
- conn->active_session = NULL;
- }
-
- silc_client_ftp_free_sessions(client, conn);
-
- memset(conn, 0, sizeof(*conn));
+ if (del && sock->user_data)
silc_client_del_connection(client, conn);
- }
silc_socket_free(sock);
}
-/* Called when we receive disconnection packet from server. This
- closes our end properly and displays the reason of the disconnection
- on the screen. */
+/* Closes the connection to the remote end */
-SILC_TASK_CALLBACK(silc_client_disconnected_by_server_later)
+void silc_client_close_connection(SilcClient client,
+ SilcClientConnection conn)
{
- SilcClient client = (SilcClient)context;
- SilcSocketConnection sock;
-
- SILC_CLIENT_GET_SOCK(client, fd, sock);
- if (sock == NULL)
- return;
-
- silc_client_close_connection(client, sock, sock->user_data);
+ // silc_client_close_connection_real(client, NULL, conn);
}
-/* Called when we receive disconnection packet from server. This
+/* Called when we receive disconnection packet from server. This
closes our end properly and displays the reason of the disconnection
on the screen. */
-void silc_client_disconnected_by_server(SilcClient client,
- SilcSocketConnection sock,
- SilcBuffer message)
+void silc_client_disconnect(SilcClient client,
+ SilcClientConnection conn,
+ SilcBuffer packet)
{
- char *msg;
+ SilcClientConnection conn;
+ SilcStatus status;
+ char *message = NULL;
SILC_LOG_DEBUG(("Server disconnected us, sock %d", sock->sock));
- msg = silc_calloc(message->len + 1, sizeof(char));
- memcpy(msg, message->data, message->len);
- client->internal->ops->say(client, sock->user_data,
- SILC_CLIENT_MESSAGE_AUDIT, msg);
- silc_free(msg);
+ if (packet->len < 1)
+ return;
+
+ status = (SilcStatus)packet->data[0];
+
+ if (packet->len > 1 &&
+ silc_utf8_valid(packet->data + 1, packet->len - 1))
+ message = silc_memdup(packet->data + 1, packet->len - 1);
+
+ conn = (SilcClientConnection)sock->user_data;
+ if (sock == conn->sock && sock->type != SILC_SOCKET_TYPE_CLIENT)
+ client->internal->ops->disconnected(client, conn, status, message);
+
+ silc_free(message);
SILC_SET_DISCONNECTED(sock);
/* Close connection through scheduler. */
- silc_schedule_task_add(client->schedule, sock->sock,
+ silc_schedule_task_add(client->schedule, sock->sock,
silc_client_disconnected_by_server_later,
- client, 0, 1, SILC_TASK_TIMEOUT,
+ client, 0, 1, SILC_TASK_TIMEOUT,
SILC_TASK_PRI_NORMAL);
}
-/* Received error message from server. Display it on the screen.
+/* Received error message from server. Display it on the screen.
We don't take any action what so ever of the error message. */
void silc_client_error_by_server(SilcClient client,
- SilcSocketConnection sock,
+ SilcClientConnection conn,
SilcBuffer message)
{
char *msg;
- msg = silc_calloc(message->len + 1, sizeof(char));
- memcpy(msg, message->data, message->len);
- client->internal->ops->say(client, sock->user_data,
+ msg = silc_memdup(message->data, message->len);
+ client->internal->ops->say(client, sock->user_data,
SILC_CLIENT_MESSAGE_AUDIT, msg);
silc_free(msg);
}
-/* Processes the received new Client ID from server. Old Client ID is
- deleted from cache and new one is added. */
+/* Auto-nicking callback to send NICK command to server. */
-void silc_client_receive_new_id(SilcClient client,
- SilcSocketConnection sock,
- SilcIDPayload idp)
+SILC_TASK_CALLBACK(silc_client_send_auto_nick)
{
- SilcClientConnection conn = (SilcClientConnection)sock->user_data;
- int connecting = FALSE;
- SilcClientID *client_id = silc_id_payload_get_id(idp);
- SilcBuffer sidp;
-
- if (!conn->local_entry)
- connecting = TRUE;
-
- /* Delete old ID from ID cache */
- if (conn->local_id) {
- /* Check whether they are different */
- if (SILC_ID_CLIENT_COMPARE(conn->local_id, client_id)) {
- silc_free(client_id);
- return;
- }
+ SilcClientConnection conn = (SilcClientConnection)context;
+ SilcClient client = conn->client;
+ if (client)
+ silc_client_command_send(client, conn, SILC_COMMAND_NICK,
+ ++conn->cmd_ident, 1, 1,
+ client->nickname, strlen(client->nickname));
+}
- silc_idcache_del_by_context(conn->client_cache, conn->local_entry);
- silc_free(conn->local_id);
- }
-
- /* Save the new ID */
+/* 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. */
- if (conn->local_id_data)
- silc_free(conn->local_id_data);
+static void silc_client_resume_session_cb(SilcClient client,
+ SilcClientConnection conn,
+ SilcBool success,
+ void *context)
+{
+ SilcBuffer sidp;
- conn->local_id = client_id;
- conn->local_id_data = silc_id_payload_get_data(idp);
- conn->local_id_data_len = silc_id_payload_get_len(idp);;
+ /* 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 (!conn->local_entry)
- conn->local_entry = silc_calloc(1, sizeof(*conn->local_entry));
-
- conn->local_entry->nickname = strdup(conn->nickname);
- if (!conn->local_entry->username)
- conn->local_entry->username = strdup(client->username);
- if (!conn->local_entry->hostname)
- conn->local_entry->hostname = strdup(client->hostname);
- conn->local_entry->server = strdup(conn->remote_host);
- conn->local_entry->id = conn->local_id;
- conn->local_entry->valid = TRUE;
-
- /* Put it to the ID cache */
- silc_idcache_add(conn->client_cache, strdup(conn->nickname), conn->local_id,
- (void *)conn->local_entry, 0, NULL);
-
- if (connecting) {
- /* Send NICK command if the nickname was set by the application (and is
- not same as the username). */
- if (client->nickname && strcmp(client->nickname, client->username))
- silc_client_command_send(client, conn, SILC_COMMAND_NICK,
- ++conn->cmd_ident, 1, 1,
- client->nickname, strlen(client->nickname));
-
- /* Issue INFO command to fetch the real server name and server information
- and other stuff. */
+ 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,
+ 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);
-
- /* Notify application of successful connection. We do it here now that
- we've received the Client ID and are allowed to send traffic. */
- client->internal->ops->connect(client, conn, TRUE);
}
}
-/* Processed received Channel ID for a channel. This is called when client
- joins to channel and server replies with channel ID. The ID is cached.
- Returns the created channel entry. This is also called when received
- channel ID in for example USERS command reply that we do not have. */
-
-SilcChannelEntry silc_client_new_channel_id(SilcClient client,
- SilcSocketConnection sock,
- char *channel_name,
- uint32 mode,
- SilcIDPayload idp)
-{
- SilcClientConnection conn = (SilcClientConnection)sock->user_data;
- SilcChannelEntry channel;
-
- SILC_LOG_DEBUG(("New channel ID"));
-
- channel = silc_calloc(1, sizeof(*channel));
- channel->channel_name = channel_name;
- channel->id = silc_id_payload_get_id(idp);
- channel->mode = mode;
- silc_list_init(channel->clients, struct SilcChannelUserStruct, next);
-
- /* Put it to the ID cache */
- silc_idcache_add(conn->channel_cache, channel->channel_name,
- (void *)channel->id, (void *)channel, 0, NULL);
-
- return channel;
-}
-
-/* Removes a client entry from all channel it has joined. This really is
- a performance killer (client_entry should have pointers to channel
- entry list). */
+/* Removes a client entry from all channels it has joined. */
void silc_client_remove_from_channels(SilcClient client,
SilcClientConnection conn,
SilcClientEntry client_entry)
{
- SilcIDCacheEntry id_cache;
- SilcIDCacheList list;
- SilcChannelEntry channel;
+ SilcHashTableList htl;
SilcChannelUser chu;
- if (!silc_idcache_get_all(conn->channel_cache, &list))
- return;
-
- silc_idcache_list_first(list, &id_cache);
- channel = (SilcChannelEntry)id_cache->context;
-
- while (channel) {
-
- /* Remove client from channel */
- silc_list_start(channel->clients);
- while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
- if (chu->client == client_entry) {
- silc_list_del(channel->clients, chu);
- silc_free(chu);
- break;
- }
- }
-
- if (!silc_idcache_list_next(list, &id_cache))
- break;
-
- channel = (SilcChannelEntry)id_cache->context;
+ silc_hash_table_list(client_entry->channels, &htl);
+ while (silc_hash_table_get(&htl, NULL, (void *)&chu)) {
+ silc_hash_table_del(chu->client->channels, chu->channel);
+ silc_hash_table_del(chu->channel->user_list, chu->client);
+ silc_free(chu);
}
- silc_idcache_list_free(list);
+ silc_hash_table_list_reset(&htl);
}
/* Replaces `old' client entries from all channels to `new' client entry.
is replaced from ID cache with the new one. If the old ID entry is only
updated, then this fucntion needs not to be called. */
-void silc_client_replace_from_channels(SilcClient client,
+void silc_client_replace_from_channels(SilcClient client,
SilcClientConnection conn,
SilcClientEntry old,
SilcClientEntry new)
{
- SilcIDCacheEntry id_cache;
- SilcIDCacheList list;
- SilcChannelEntry channel;
+ SilcHashTableList htl;
SilcChannelUser chu;
- if (!silc_idcache_get_all(conn->channel_cache, &list))
- return;
-
- silc_idcache_list_first(list, &id_cache);
- channel = (SilcChannelEntry)id_cache->context;
-
- while (channel) {
-
+ silc_hash_table_list(old->channels, &htl);
+ while (silc_hash_table_get(&htl, NULL, (void *)&chu)) {
/* Replace client entry */
- silc_list_start(channel->clients);
- while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
- if (chu->client == old) {
- chu->client = new;
- break;
- }
- }
+ silc_hash_table_del(chu->client->channels, chu->channel);
+ silc_hash_table_del(chu->channel->user_list, chu->client);
- if (!silc_idcache_list_next(list, &id_cache))
- break;
-
- channel = (SilcChannelEntry)id_cache->context;
+ chu->client = new;
+ silc_hash_table_add(chu->channel->user_list, chu->client, chu);
+ silc_hash_table_add(chu->client->channels, chu->channel, chu);
}
-
- silc_idcache_list_free(list);
+ silc_hash_table_list_reset(&htl);
}
/* Registers failure timeout to process the received failure packet
with timeout. */
void silc_client_process_failure(SilcClient client,
- SilcSocketConnection sock,
+ SilcClientConnection conn,
SilcPacketContext *packet)
{
- uint32 failure = 0;
+ SilcUInt32 failure = 0;
if (sock->protocol) {
if (packet->buffer->len >= 4)
/* Notify application */
client->internal->ops->failure(client, sock->user_data, sock->protocol,
- (void *)failure);
+ SILC_32_TO_PTR(failure));
}
}
/* A timeout callback for the re-key. We will be the initiator of the
re-key protocol. */
-SILC_TASK_CALLBACK(silc_client_rekey_callback)
+SILC_TASK_CALLBACK_GLOBAL(silc_client_rekey_callback)
{
- SilcSocketConnection sock = (SilcSocketConnection)context;
+ SilcClientConnection conn = (SilcSocketConnection)context;
SilcClientConnection conn = (SilcClientConnection)sock->user_data;
- SilcClient client = (SilcClient)conn->rekey->context;
+ SilcClient client = (SilcClient)conn->internal->rekey->context;
SilcProtocol protocol;
SilcClientRekeyInternalContext *proto_ctx;
SILC_LOG_DEBUG(("Start"));
+ /* If rekey protocol is active already wait for it to finish */
+ if (sock->protocol && sock->protocol->protocol &&
+ sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)
+ return;
+
/* Allocate internal protocol context. This is sent as context
to the protocol. */
proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
proto_ctx->client = (void *)client;
proto_ctx->sock = silc_socket_dup(sock);
proto_ctx->responder = FALSE;
- proto_ctx->pfs = conn->rekey->pfs;
-
+ proto_ctx->pfs = conn->internal->rekey->pfs;
+
/* Perform rekey protocol. Will call the final callback after the
protocol is over. */
- silc_protocol_alloc(SILC_PROTOCOL_CLIENT_REKEY,
+ silc_protocol_alloc(SILC_PROTOCOL_CLIENT_REKEY,
&protocol, proto_ctx, silc_client_rekey_final);
sock->protocol = protocol;
-
+
/* Run the protocol */
silc_protocol_execute(protocol, client->schedule, 0, 0);
-
- /* Re-register re-key timeout */
- silc_schedule_task_add(client->schedule, sock->sock,
- silc_client_rekey_callback,
- context, conn->rekey->timeout, 0,
- SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
}
/* The final callback for the REKEY protocol. This will actually take the
SilcClientRekeyInternalContext *ctx =
(SilcClientRekeyInternalContext *)protocol->context;
SilcClient client = (SilcClient)ctx->client;
- SilcSocketConnection sock = ctx->sock;
+ SilcClientConnection conn = ctx->sock;
+ SilcClientConnection conn = (SilcClientConnection)sock->user_data;
SILC_LOG_DEBUG(("Start"));
go to the network before we quit the protocol. */
silc_client_packet_queue_purge(client, sock);
+ /* Re-register re-key timeout */
+ if (ctx->responder == FALSE)
+ silc_schedule_task_add(client->schedule, sock->sock,
+ silc_client_rekey_callback,
+ sock, conn->internal->rekey->timeout, 0,
+ SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
+
/* Cleanup */
silc_protocol_free(protocol);
sock->protocol = NULL;
client does not know it beforehand. */
void silc_client_connection_auth_request(SilcClient client,
- SilcSocketConnection sock,
+ SilcClientConnection conn,
SilcPacketContext *packet)
{
SilcClientConnection conn = (SilcClientConnection)sock->user_data;
- uint16 conn_type, auth_meth;
+ SilcUInt16 conn_type, auth_meth;
int ret;
/* If we haven't send our request then ignore this one. */
- if (!conn->connauth)
+ if (!conn->internal->connauth)
return;
/* Parse the payload */
if (ret == -1)
auth_meth = SILC_AUTH_NONE;
- /* Call the request callback to notify application for received
+ /* Call the request callback to notify application for received
authentication method information. */
- if (conn->connauth->callback)
- (*conn->connauth->callback)(client, conn, auth_meth,
- conn->connauth->context);
+ if (conn->internal->connauth->callback)
+ (*conn->internal->connauth->callback)(client, conn, auth_meth,
+ conn->internal->connauth->context);
- silc_schedule_task_del(client->schedule, conn->connauth->timeout);
+ silc_schedule_task_del(client->schedule, conn->internal->connauth->timeout);
- silc_free(conn->connauth);
- conn->connauth = NULL;
+ silc_free(conn->internal->connauth);
+ conn->internal->connauth = NULL;
}
-/* Timeout task callback called if the server does not reply to our
+/* 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->connauth)
+ if (!conn->internal->connauth)
return;
/* Call the request callback to notify application */
- if (conn->connauth->callback)
- (*conn->connauth->callback)(client, conn, SILC_AUTH_NONE,
- conn->connauth->context);
+ if (conn->internal->connauth->callback)
+ (*conn->internal->connauth->callback)(client, conn, SILC_AUTH_NONE,
+ conn->internal->connauth->context);
- silc_free(conn->connauth);
- conn->connauth = NULL;
+ silc_free(conn->internal->connauth);
+ conn->internal->connauth = NULL;
}
/* This function can be used to request the current authentication method
The `callback' with `context' will be called after the server has
replied back with the current authentication method. */
-void
+void
silc_client_request_authentication_method(SilcClient client,
SilcClientConnection conn,
SilcConnectionAuthRequest callback,
SilcClientConnAuthRequest connauth;
SilcBuffer packet;
+ assert(client && conn);
connauth = silc_calloc(1, sizeof(*connauth));
connauth->callback = callback;
connauth->context = context;
- if (conn->connauth)
- silc_free(conn->connauth);
+ if (conn->internal->connauth)
+ silc_free(conn->internal->connauth);
- conn->connauth = connauth;
+ conn->internal->connauth = connauth;
/* Assemble the request packet and send it to the server */
packet = silc_buffer_alloc(4);
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_client_packet_send(client, conn->sock,
SILC_PACKET_CONNECTION_AUTH_REQUEST,
- NULL, 0, NULL, NULL,
+ 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_schedule_task_add(client->schedule, conn->sock->sock,
silc_client_request_authentication_method_timeout,
- conn,
+ conn,
client->internal->params->connauth_request_secs, 0,
SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
}
+#endif /* 0 */
+
+
+/******************************* Client API *********************************/
+
+/* 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
+ and caller must free it. */
+
+SilcClient silc_client_alloc(SilcClientOperations *ops,
+ SilcClientParams *params,
+ void *application,
+ const char *version_string)
+{
+ SilcClient new_client;
+
+ new_client = silc_calloc(1, sizeof(*new_client));
+ new_client->application = application;
+
+ new_client->internal = silc_calloc(1, sizeof(*new_client->internal));
+ new_client->internal->ops = ops;
+ new_client->internal->params =
+ silc_calloc(1, sizeof(*new_client->internal->params));
+ if (!version_string)
+ version_string = silc_version_string;
+ new_client->internal->silc_client_version = strdup(version_string);
+
+ 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;
+
+ return new_client;
+}
+
+/* Frees client object and its internals. */
+
+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_hash_free(client->md5hash);
+ silc_hash_free(client->sha1hash);
+ silc_hmac_free(client->internal->md5hmac);
+ silc_hmac_free(client->internal->sha1hmac);
+ 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
+ the client ready to be run. One must call silc_client_run to run the
+ client. Returns FALSE if error occured, TRUE otherwise. */
+
+SilcBool silc_client_init(SilcClient client)
+{
+ SILC_LOG_DEBUG(("Initializing client"));
+
+ assert(client);
+ assert(client->username);
+ assert(client->hostname);
+ assert(client->realname);
+
+ /* Validate essential strings */
+ if (client->nickname)
+ if (!silc_identifier_verify(client->nickname, strlen(client->nickname),
+ SILC_STRING_UTF8, 128)) {
+ SILC_LOG_ERROR(("Malformed nickname '%s'", client->nickname));
+ return FALSE;
+ }
+ if (!silc_identifier_verify(client->username, strlen(client->username),
+ SILC_STRING_UTF8, 128)) {
+ SILC_LOG_ERROR(("Malformed username '%s'", client->username));
+ return FALSE;
+ }
+ if (!silc_identifier_verify(client->hostname, strlen(client->hostname),
+ SILC_STRING_UTF8, 256)) {
+ SILC_LOG_ERROR(("Malformed hostname '%s'", client->hostname));
+ return FALSE;
+ }
+ if (!silc_utf8_valid(client->realname, strlen(client->realname))) {
+ SILC_LOG_ERROR(("Malformed realname '%s'", client->realname));
+ 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();
+ }
+
+ /* Initialize hash functions for client to use */
+ silc_hash_alloc("md5", &client->md5hash);
+ silc_hash_alloc("sha1", &client->sha1hash);
+
+ /* Initialize random number generator */
+ client->rng = silc_rng_alloc();
+ 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 : 200, client);
+ if (!client->schedule)
+ return FALSE;
+
+ /* Start packet engine */
+ client->internal->packet_engine =
+ silc_packet_engine_start(client->rng, FALSE, &silc_client_stream_cbs,
+ client);
+ 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);
+
+ 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. */
+
+void silc_client_run(SilcClient client)
+{
+ SILC_LOG_DEBUG(("Starting SILC client"));
+
+ /* Start the client */
+ 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);
+
+ /* Run the scheduler */
+ silc_schedule(client->schedule);
+}
+
+/* Call scheduler one iteration and return. This cannot be called if threads
+ are in use. */
+
+void silc_client_run_one(SilcClient client)
+{
+ silc_schedule_one(client->schedule, -1);
+}
projects / silc.git / blobdiff