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
the Free Software Foundation; version 2 of the License.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
if (silc_net_is_ip4(ip_addr)) {
/* IPv4 address */
len = sizeof(addr->sin.sin_addr);
- silc_net_addr2bin(ip_addr,
+ silc_net_addr2bin(ip_addr,
(unsigned char *)&addr->sin.sin_addr.s_addr, len);
addr->sin.sin_family = AF_INET;
addr->sin.sin_port = port ? htons(port) : 0;
#ifdef HAVE_IPV6
/* IPv6 address */
len = sizeof(addr->sin6.sin6_addr);
- silc_net_addr2bin(ip_addr,
+ silc_net_addr2bin(ip_addr,
(unsigned char *)&addr->sin6.sin6_addr, len);
addr->sin6.sin6_family = AF_INET6;
addr->sin6.sin6_port = port ? htons(port) : 0;
return TRUE;
}
-/* This function creates server or daemon or listener or what ever. This
- does not fork a new process, it must be done by the caller if caller
- wants to create a child process. This is used by the SILC server.
- If argument `ip_addr' is NULL `any' address will be used. Returns
- the created socket or -1 on error. */
+/* Deliver new stream to upper layer */
-int silc_net_create_server(int port, const char *ip_addr)
+static void silc_net_accept_stream(SilcSocketStreamStatus status,
+ SilcStream stream, void *context)
{
- int sock, rval;
- SilcSockaddr server;
+ SilcNetServer server = context;
- SILC_LOG_DEBUG(("Creating a new server listener"));
+ if (status != SILC_SOCKET_OK)
+ return;
- /* Set sockaddr for server */
- if (!silc_net_set_sockaddr(&server, ip_addr, port))
- return -1;
+ server->callback(SILC_NET_OK, stream, server->context);
+}
- /* Create the socket */
- sock = socket(server.sin.sin_family, SOCK_STREAM, 0);
- if (sock < 0) {
- SILC_LOG_ERROR(("Cannot create socket: %s", strerror(errno)));
- return -1;
- }
+/* Accept incoming connection and notify upper layer */
- /* Set the socket options */
- rval = silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
- if (rval < 0) {
- SILC_LOG_ERROR(("Cannot set socket options: %s", strerror(errno)));
- return -1;
- }
+SILC_TASK_CALLBACK(silc_net_accept)
+{
+ SilcNetServer server = context;
+ int sock;
- /* Bind the server socket */
- rval = bind(sock, &server.sa, SIZEOF_SOCKADDR(server));
- if (rval < 0) {
- SILC_LOG_DEBUG(("Cannot bind socket: %s", strerror(errno)));
- return -1;
- }
+ SILC_LOG_DEBUG(("Accepting new connection"));
- /* Specify that we are listenning */
- rval = listen(sock, 5);
- if (rval < 0) {
- SILC_LOG_ERROR(("Cannot set socket listenning: %s", strerror(errno)));
- return -1;
- }
+ sock = silc_net_accept_connection(fd);
+ if (sock < 0)
+ return;
- /* Set the server socket to non-blocking mode */
+ /* Set socket options */
silc_net_set_socket_nonblock(sock);
+ silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
- SILC_LOG_DEBUG(("Server listener created, fd=%d", sock));
-
- return sock;
+ /* Create socket stream */
+ silc_socket_stream_create(sock, TRUE, server->require_fqdn, schedule,
+ silc_net_accept_stream, server);
}
-/* Closes the server by closing the socket connection. */
+/* Create network listener */
-void silc_net_close_server(int sock)
+SilcNetServer
+silc_net_create_server(const char **local_ip_addr, SilcUInt32 local_ip_count,
+ int port, bool require_fqdn, SilcSchedule schedule,
+ SilcNetCallback callback, void *context)
{
- shutdown(sock, 2);
- close(sock);
-
- SILC_LOG_DEBUG(("Server socket closed"));
-}
+ SilcNetServer netserver = NULL;
+ SilcSockaddr server;
+ int i, sock, rval;
+ const char *ipany = "0.0.0.0";
-/* Creates a connection (TCP/IP) to a remote host. Returns the connection
- socket or -1 on error. This blocks the process while trying to create
- the connection. */
+ SILC_LOG_DEBUG(("Creating new network listener"));
-int silc_net_create_connection(const char *local_ip, int port,
- const char *host)
-{
- int sock, rval;
- char ip_addr[64];
- SilcSockaddr desthost;
- bool prefer_ipv6 = TRUE;
+ if (port < 1 || !schedule || !callback)
+ goto err;
- SILC_LOG_DEBUG(("Creating connection to host %s port %d", host, port));
+ netserver = silc_calloc(1, sizeof(*netserver));
+ if (!netserver) {
+ callback(SILC_NET_NO_MEMORY, NULL, context);
+ return NULL;
+ }
+ netserver->schedule = schedule;
+ netserver->callback = callback;
+ netserver->context = context;
+
+ if (local_ip_count > 0) {
+ netserver->socks = silc_calloc(local_ip_count, sizeof(*netserver->socks));
+ if (!netserver->socks) {
+ callback(SILC_NET_NO_MEMORY, NULL, context);
+ return NULL;
+ }
+ } else {
+ netserver->socks = silc_calloc(1, sizeof(*netserver->socks));
+ if (!netserver->socks) {
+ callback(SILC_NET_NO_MEMORY, NULL, context);
+ return NULL;
+ }
- /* Do host lookup */
- retry:
- if (!silc_net_gethostbyname(host, prefer_ipv6, ip_addr, sizeof(ip_addr))) {
- SILC_LOG_ERROR(("Network (%s) unreachable: could not resolve the "
- "IP address", host));
- return -1;
+ local_ip_count = 1;
}
- /* Set sockaddr for this connection */
- if (!silc_net_set_sockaddr(&desthost, ip_addr, port))
- return -1;
+ /* Bind to local addresses */
+ for (i = 0; i < local_ip_count; i++) {
+ SILC_LOG_DEBUG(("Binding to local address %s",
+ local_ip_addr ? local_ip_addr[i] : ipany));
+
+ /* Set sockaddr for server */
+ if (!silc_net_set_sockaddr(&server,
+ local_ip_addr ? local_ip_addr[i] : ipany,
+ port))
+ goto err;
+
+ /* Create the socket */
+ sock = socket(server.sin.sin_family, SOCK_STREAM, 0);
+ if (sock < 0) {
+ SILC_LOG_ERROR(("Cannot create socket: %s", strerror(errno)));
+ goto err;
+ }
- /* Create the connection socket */
- sock = socket(desthost.sin.sin_family, SOCK_STREAM, 0);
- if (sock < 0) {
- /* If address is IPv6, then fallback to IPv4 and see whether we can do
- better with that on socket creation. */
- if (prefer_ipv6 && silc_net_is_ip6(ip_addr)) {
- prefer_ipv6 = FALSE;
- goto retry;
+ /* Set the socket options */
+ rval = silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
+ if (rval < 0) {
+ SILC_LOG_ERROR(("Cannot set socket options: %s", strerror(errno)));
+ goto err;
}
- SILC_LOG_ERROR(("Cannot create socket: %s", strerror(errno)));
- return -1;
- }
+ /* Bind the server socket */
+ rval = bind(sock, &server.sa, SIZEOF_SOCKADDR(server));
+ if (rval < 0) {
+ SILC_LOG_DEBUG(("Cannot bind socket: %s", strerror(errno)));
+ goto err;
+ }
- /* Bind to the local address if provided */
- if (local_ip) {
- SilcSockaddr local;
+ /* Specify that we are listenning */
+ rval = listen(sock, 5);
+ if (rval < 0) {
+ SILC_LOG_ERROR(("Cannot set socket listenning: %s", strerror(errno)));
+ goto err;
+ }
- /* Set sockaddr for local listener, and try to bind it. */
- if (silc_net_set_sockaddr(&local, local_ip, 0))
- bind(sock, &local.sa, SIZEOF_SOCKADDR(local));
- }
+ /* Set the server socket to non-blocking mode */
+ silc_net_set_socket_nonblock(sock);
- /* Connect to the host */
- rval = connect(sock, &desthost.sa, SIZEOF_SOCKADDR(desthost));
- if (rval < 0) {
- /* retry using an IPv4 adress, if IPv6 didn't work */
- if (prefer_ipv6 && silc_net_is_ip6(ip_addr)) {
- shutdown(sock, 2);
- close(sock);
+ /* Schedule for incoming connections */
+ silc_schedule_task_add_fd(schedule, sock, silc_net_accept, netserver);
- prefer_ipv6 = FALSE;
- goto retry;
- }
- SILC_LOG_ERROR(("Cannot connect to remote host: %s", strerror(errno)));
- shutdown(sock, 2);
- close(sock);
- return -1;
+ SILC_LOG_DEBUG(("Network listener created, fd=%d", sock));
+ netserver->socks[i] = sock;
+ netserver->socks_count++;
}
- /* Set appropriate options */
-#if defined(TCP_NODELAY)
- silc_net_set_socket_opt(sock, IPPROTO_TCP, TCP_NODELAY, 1);
-#endif
- silc_net_set_socket_opt(sock, SOL_SOCKET, SO_KEEPALIVE, 1);
+ return netserver;
+
+ err:
+ if (callback)
+ callback(SILC_NET_ERROR, NULL, context);
+ if (netserver)
+ silc_net_close_server(netserver);
+ return NULL;
+}
- SILC_LOG_DEBUG(("Connection created"));
+/* Close network listener */
- return sock;
+void silc_net_close_server(SilcNetServer server)
+{
+ int i;
+
+ SILC_LOG_DEBUG(("Closing network listener"));
+
+ for (i = 0; i < server->socks_count; i++) {
+ silc_schedule_task_del_by_fd(server->schedule, server->socks[i]);
+ shutdown(server->socks[i], 2);
+ close(server->socks[i]);
+ }
+
+ silc_free(server->socks);
+ silc_free(server);
}
-/* Creates a connection (TCP/IP) to a remote host. Returns the connection
- socket or -1 on error. This creates non-blocking socket hence the
- connection returns directly. To get the result of the connect() one
- must select() the socket and read the result after it's ready. */
+/* Asynchronous TCP/IP connecting */
+
+typedef struct {
+ SilcNetStatus status;
+ SilcSocketStreamStatus stream_status;
+ SilcStream stream;
+ SilcFSMStruct fsm;
+ SilcFSMSemaStruct sema;
+ SilcAsyncOperation op;
+ SilcAsyncOperation sop;
+ char *local_ip;
+ char *remote;
+ char ip_addr[64];
+ int sock;
+ SilcNetCallback callback;
+ void *context;
+ unsigned int port : 24;
+ unsigned int retry : 7;
+ unsigned int aborted : 1;
+} *SilcNetConnect;
+
+SILC_FSM_STATE(silc_net_connect_st_start);
+SILC_FSM_STATE(silc_net_connect_st_connected);
+SILC_FSM_STATE(silc_net_connect_st_stream);
+SILC_FSM_STATE(silc_net_connect_st_finish);
+
+SILC_TASK_CALLBACK(silc_net_connect_wait)
+{
+ SilcNetConnect conn = context;
+ SILC_FSM_SEMA_POST(&conn->sema);
+}
-int silc_net_create_connection_async(const char *local_ip, int port,
- const char *host)
+SILC_FSM_STATE(silc_net_connect_st_start)
{
+ SilcNetConnect conn = fsm_context;
int sock, rval;
- char ip_addr[64];
SilcSockaddr desthost;
bool prefer_ipv6 = TRUE;
- SILC_LOG_DEBUG(("Creating connection (async) to host %s port %d",
- host, port));
+ if (conn->aborted) {
+ /** Aborted */
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
+ }
/* Do host lookup */
retry:
- if (!silc_net_gethostbyname(host, prefer_ipv6, ip_addr, sizeof(ip_addr))) {
+ if (!silc_net_gethostbyname(conn->remote, prefer_ipv6,
+ conn->ip_addr, sizeof(conn->ip_addr))) {
SILC_LOG_ERROR(("Network (%s) unreachable: could not resolve the "
- "IP address", host));
- return -1;
+ "host", conn->remote));
+
+ /** Network unreachable */
+ conn->status = SILC_NET_HOST_UNREACHABLE;
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
}
/* Set sockaddr for this connection */
- if (!silc_net_set_sockaddr(&desthost, ip_addr, port))
- return -1;
+ if (!silc_net_set_sockaddr(&desthost, conn->ip_addr, conn->port)) {
+ /** Sockaddr failed */
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
+ }
/* Create the connection socket */
sock = socket(desthost.sin.sin_family, SOCK_STREAM, 0);
if (sock < 0) {
/* If address is IPv6, then fallback to IPv4 and see whether we can do
better with that on socket creation. */
- if (prefer_ipv6 && silc_net_is_ip6(ip_addr)) {
+ if (prefer_ipv6 && silc_net_is_ip6(conn->ip_addr)) {
prefer_ipv6 = FALSE;
goto retry;
}
+ /** Cannot create socket */
SILC_LOG_ERROR(("Cannot create socket: %s", strerror(errno)));
- return -1;
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
}
/* Bind to the local address if provided */
- if (local_ip) {
+ if (conn->local_ip) {
SilcSockaddr local;
/* Set sockaddr for local listener, and try to bind it. */
- if (silc_net_set_sockaddr(&local, local_ip, 0))
+ if (silc_net_set_sockaddr(&local, conn->local_ip, 0))
bind(sock, &local.sa, SIZEOF_SOCKADDR(local));
}
/* Connect to the host */
rval = connect(sock, &desthost.sa, SIZEOF_SOCKADDR(desthost));
if (rval < 0) {
- if (errno != EINPROGRESS) {
+ if (errno != EINPROGRESS) {
/* retry using an IPv4 adress, if IPv6 didn't work */
- if (prefer_ipv6 && silc_net_is_ip6(ip_addr)) {
+ if (prefer_ipv6 && silc_net_is_ip6(conn->ip_addr)) {
shutdown(sock, 2);
close(sock);
goto retry;
}
- SILC_LOG_ERROR(("Cannot connect to remote host: %s", strerror(errno)));
shutdown(sock, 2);
close(sock);
- return -1;
+
+ /** Cannot connect to remote host */
+ SILC_LOG_ERROR(("Cannot connect to remote host: %s", strerror(errno)));
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
}
}
SILC_LOG_DEBUG(("Connection operation in progress"));
- return sock;
+ conn->sock = sock;
+
+ /** Wait for connection */
+ silc_fsm_next(fsm, silc_net_connect_st_connected);
+ silc_fsm_sema_init(&conn->sema, fsm, 0);
+ silc_schedule_task_add_fd(silc_fsm_get_schedule(fsm), sock,
+ silc_net_connect_wait, conn);
+ silc_schedule_set_listen_fd(silc_fsm_get_schedule(fsm), sock,
+ SILC_TASK_WRITE, FALSE);
+ SILC_FSM_SEMA_WAIT(&conn->sema);
+ return SILC_FSM_CONTINUE;
+}
+
+static void silc_net_connect_wait_stream(SilcSocketStreamStatus status,
+ SilcStream stream, void *context)
+{
+ SilcNetConnect conn = context;
+ conn->stream_status = status;
+ conn->stream = stream;
+ SILC_FSM_CALL_CONTINUE(&conn->fsm);
+}
+
+SILC_FSM_STATE(silc_net_connect_st_connected)
+{
+ SilcNetConnect conn = fsm_context;
+ SilcSchedule schedule = silc_fsm_get_schedule(fsm);
+ int opt = EINVAL, optlen = sizeof(opt), ret;
+
+ if (conn->aborted) {
+ /** Aborted */
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
+ }
+
+ ret = silc_net_get_socket_opt(conn->sock, SOL_SOCKET, SO_ERROR,
+ &opt, &optlen);
+
+ silc_schedule_task_del_by_fd(schedule, conn->sock);
+ silc_schedule_unset_listen_fd(schedule, conn->sock);
+
+ if (ret != 0 || opt != 0) {
+ if (conn->retry) {
+ /** Retry connecting */
+ SILC_LOG_DEBUG(("Retry connecting"));
+ conn->retry--;
+ silc_net_close_connection(conn->sock);
+ silc_fsm_next(fsm, silc_net_connect_st_start);
+ return SILC_FSM_CONTINUE;
+ }
+
+#if defined(ECONNREFUSED)
+ if (errno == ECONNREFUSED)
+ conn->status = SILC_NET_CONNECTION_REFUSED;
+#endif /* ECONNREFUSED */
+#if defined(ETIMEDOUT)
+ if (errno == ETIMEDOUT)
+ conn->status = SILC_NET_CONNECTION_TIMEOUT;
+#endif /* ETIMEDOUT */
+#if defined(ENETUNREACH)
+ if (errno == ENETUNREACH)
+ conn->status = SILC_NET_HOST_UNREACHABLE;
+#endif /* ENETUNREACH */
+
+ /** Connecting failed */
+ SILC_LOG_DEBUG(("Connecting failed"));
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
+ }
+
+ /** Connection created */
+ silc_fsm_next(fsm, silc_net_connect_st_stream);
+ SILC_FSM_CALL((conn->sop = silc_socket_stream_create(
+ conn->sock, FALSE, FALSE,
+ schedule,
+ silc_net_connect_wait_stream, conn)));
+}
+
+SILC_FSM_STATE(silc_net_connect_st_stream)
+{
+ SilcNetConnect conn = fsm_context;
+
+ if (conn->aborted) {
+ /** Aborted */
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
+ }
+
+ if (conn->stream_status != SILC_SOCKET_OK) {
+ /** Stream creation failed */
+ if (conn->stream_status == SILC_SOCKET_UNKNOWN_IP)
+ conn->status = SILC_NET_UNKNOWN_IP;
+ else if (conn->stream_status == SILC_SOCKET_UNKNOWN_HOST)
+ conn->status = SILC_NET_UNKNOWN_HOST;
+ else
+ conn->status = SILC_NET_ERROR;
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
+ }
+
+ /* Set stream information */
+ silc_socket_stream_set_info(conn->stream,
+ !silc_net_is_ip(conn->remote) ? conn->remote :
+ conn->ip_addr, conn->ip_addr, conn->port);
+
+ /** Stream created successfully */
+ SILC_LOG_DEBUG(("Connected successfully"));
+ conn->status = SILC_NET_OK;
+ silc_fsm_next(fsm, silc_net_connect_st_finish);
+ return SILC_FSM_CONTINUE;
+}
+
+SILC_FSM_STATE(silc_net_connect_st_finish)
+{
+ SilcNetConnect conn = fsm_context;
+
+ /* Deliver error or new stream */
+ if (!conn->aborted) {
+ conn->callback(conn->status, conn->stream, conn->context);
+ if (conn->op)
+ silc_async_free(conn->op);
+ if (conn->sop)
+ silc_async_free(conn->sop);
+ }
+
+ return SILC_FSM_FINISH;
+}
+
+static void silc_net_connect_abort(SilcAsyncOperation op, void *context)
+{
+ SilcNetConnect conn = context;
+ conn->aborted = TRUE;
+
+ /* Abort underlaying stream creation too */
+ if (conn->sop)
+ silc_async_abort(conn->op, NULL, NULL);
+}
+
+static void silc_net_connect_destructor(SilcFSM fsm, void *fsm_context,
+ void *destructor_context)
+{
+ SilcNetConnect conn = fsm_context;
+ silc_free(conn->local_ip);
+ silc_free(conn->remote);
+ silc_free(conn);
+}
+
+/* Create asynchronous TCP/IP connection. */
+
+SilcAsyncOperation silc_net_tcp_connect(const char *local_ip_addr,
+ const char *remote_ip_addr,
+ int remote_port,
+ SilcSchedule schedule,
+ SilcNetCallback callback,
+ void *context)
+{
+ SilcNetConnect conn;
+
+ if (!remote_ip_addr || remote_port < 1 || !schedule || !callback)
+ return NULL;
+
+ SILC_LOG_DEBUG(("Creating connection to host %s port %d",
+ remote_ip_addr, remote_port));
+
+ conn = silc_calloc(1, sizeof(*conn));
+ if (!conn) {
+ callback(SILC_NET_NO_MEMORY, NULL, context);
+ return NULL;
+ }
+
+ /* Start async operation */
+ conn->op = silc_async_alloc(silc_net_connect_abort, NULL, conn);
+ if (!conn->op) {
+ callback(SILC_NET_NO_MEMORY, NULL, context);
+ return NULL;
+ }
+
+ if (local_ip_addr)
+ conn->local_ip = strdup(local_ip_addr);
+ conn->remote = strdup(remote_ip_addr);
+ if (!conn->remote) {
+ callback(SILC_NET_NO_MEMORY, NULL, context);
+ return NULL;
+ }
+ conn->port = remote_port;
+ conn->callback = callback;
+ conn->context = context;
+ conn->retry = 1;
+ conn->status = SILC_NET_ERROR;
+
+ silc_fsm_init(&conn->fsm, conn, silc_net_connect_destructor, NULL, schedule);
+ silc_fsm_start(&conn->fsm, silc_net_connect_st_start);
+
+ return conn->op;
}
/* Closes the connection by closing the socket connection. */
ret = inet_aton(addr, &tmp);
if (bin_len < 4)
return FALSE;
-
+
memcpy(bin, (unsigned char *)&tmp.s_addr, 4);
#ifdef HAVE_IPV6
} else {
projects / silc.git / blobdiff