1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-server-unix.c Server implementation for Unix network protocols.
4 * Copyright (C) 2002 Red Hat Inc.
6 * Licensed under the Academic Free License version 1.2
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include "dbus-internals.h"
25 #include "dbus-server-unix.h"
26 #include "dbus-transport-unix.h"
27 #include "dbus-connection-internal.h"
28 #include <sys/types.h>
32 * @defgroup DBusServerUnix DBusServer implementations for UNIX
33 * @ingroup DBusInternals
34 * @brief Implementation details of DBusServer on UNIX
40 * Opaque object representing a Unix server implementation.
42 typedef struct DBusServerUnix DBusServerUnix;
45 * Implementation details of DBusServerUnix. All members
50 DBusServer base; /**< Parent class members. */
51 int fd; /**< File descriptor or -1 if disconnected. */
52 DBusWatch *watch; /**< File descriptor watch. */
56 unix_finalize (DBusServer *server)
58 DBusServerUnix *unix_server = (DBusServerUnix*) server;
60 _dbus_server_finalize_base (server);
62 if (unix_server->watch)
63 _dbus_watch_unref (unix_server->watch);
69 * @todo unreffing the connection at the end may cause
70 * us to drop the last ref to the connection before
71 * disconnecting it. That is invalid.
73 /* Return value is just for memory, not other failures. */
75 handle_new_client_fd (DBusServer *server,
78 DBusConnection *connection;
79 DBusTransport *transport;
81 _dbus_verbose ("Creating new client connection with fd %d\n", client_fd);
83 if (!_dbus_set_fd_nonblocking (client_fd, NULL))
86 transport = _dbus_transport_new_for_fd (client_fd, TRUE, NULL);
87 if (transport == NULL)
93 if (!_dbus_transport_set_auth_mechanisms (transport,
94 (const char **) server->auth_mechanisms))
96 _dbus_transport_unref (transport);
100 /* note that client_fd is now owned by the transport, and will be
101 * closed on transport disconnection/finalization
104 connection = _dbus_connection_new_for_transport (transport);
105 _dbus_transport_unref (transport);
107 if (connection == NULL)
110 _dbus_connection_set_connection_counter (connection,
111 server->connection_counter);
113 /* See if someone wants to handle this new connection,
114 * self-referencing for paranoia
116 if (server->new_connection_function)
118 dbus_server_ref (server);
120 (* server->new_connection_function) (server, connection,
121 server->new_connection_data);
122 dbus_server_unref (server);
125 /* If no one grabbed a reference, the connection will die. */
126 dbus_connection_unref (connection);
132 unix_handle_watch (DBusServer *server,
136 DBusServerUnix *unix_server = (DBusServerUnix*) server;
138 _dbus_assert (watch == unix_server->watch);
140 _dbus_verbose ("Handling client connection, flags 0x%x\n", flags);
142 if (flags & DBUS_WATCH_READABLE)
147 listen_fd = dbus_watch_get_fd (watch);
149 client_fd = _dbus_accept (listen_fd);
153 /* EINTR handled for us */
155 if (errno == EAGAIN || errno == EWOULDBLOCK)
156 _dbus_verbose ("No client available to accept after all\n");
158 _dbus_verbose ("Failed to accept a client connection: %s\n",
159 _dbus_strerror (errno));
163 _dbus_fd_set_close_on_exec (client_fd);
165 if (!handle_new_client_fd (server, client_fd))
166 _dbus_verbose ("Rejected client connection due to lack of memory\n");
170 if (flags & DBUS_WATCH_ERROR)
171 _dbus_verbose ("Error on server listening socket\n");
173 if (flags & DBUS_WATCH_HANGUP)
174 _dbus_verbose ("Hangup on server listening socket\n");
180 unix_disconnect (DBusServer *server)
182 DBusServerUnix *unix_server = (DBusServerUnix*) server;
184 if (unix_server->watch)
186 _dbus_server_remove_watch (server,
188 _dbus_watch_unref (unix_server->watch);
189 unix_server->watch = NULL;
192 close (unix_server->fd);
193 unix_server->fd = -1;
196 static DBusServerVTable unix_vtable = {
203 * Creates a new server listening on the given file descriptor. The
204 * file descriptor should be nonblocking (use
205 * _dbus_set_fd_nonblocking() to make it so). The file descriptor
206 * should be listening for connections, that is, listen() should have
207 * been successfully invoked on it. The server will use accept() to
208 * accept new client connections.
210 * @param fd the file descriptor.
211 * @param address the server's address
212 * @returns the new server, or #NULL if no memory.
216 _dbus_server_new_for_fd (int fd,
217 const DBusString *address)
219 DBusServerUnix *unix_server;
222 watch = _dbus_watch_new (fd,
228 unix_server = dbus_new0 (DBusServerUnix, 1);
229 if (unix_server == NULL)
231 _dbus_watch_unref (watch);
235 if (!_dbus_server_init_base (&unix_server->base,
236 &unix_vtable, address))
238 _dbus_watch_unref (watch);
239 dbus_free (unix_server);
243 if (!_dbus_server_add_watch (&unix_server->base,
246 _dbus_server_finalize_base (&unix_server->base);
247 _dbus_watch_unref (watch);
248 dbus_free (unix_server);
252 unix_server->fd = fd;
253 unix_server->watch = watch;
255 return (DBusServer*) unix_server;
259 * Creates a new server listening on the given Unix domain socket.
261 * @param path the path for the domain socket.
262 * @param error location to store reason for failure.
263 * @returns the new server, or #NULL on failure.
266 _dbus_server_new_for_domain_socket (const char *path,
273 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
275 if (!_dbus_string_init (&address))
277 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
281 if (!_dbus_string_append (&address, "unix:path=") ||
282 !_dbus_string_append (&address, path))
284 _dbus_string_free (&address);
285 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
289 listen_fd = _dbus_listen_unix_socket (path, error);
290 _dbus_fd_set_close_on_exec (listen_fd);
294 _dbus_string_free (&address);
298 server = _dbus_server_new_for_fd (listen_fd, &address);
301 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
303 _dbus_string_free (&address);
307 _dbus_string_free (&address);
313 * Creates a new server listening on the given hostname and port.
314 * If the hostname is NULL, listens on localhost.
316 * @param host the hostname to listen on.
317 * @param port the port to listen on.
318 * @param error location to store reason for failure.
319 * @returns the new server, or #NULL on failure.
322 _dbus_server_new_for_tcp_socket (const char *host,
330 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
332 if (!_dbus_string_init (&address))
334 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
338 if (!_dbus_string_append (&address, "tcp:host=") ||
339 !_dbus_string_append (&address, host) ||
340 !_dbus_string_append (&address, ",port=") ||
341 !_dbus_string_append_int (&address, port))
343 _dbus_string_free (&address);
344 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
348 listen_fd = _dbus_listen_tcp_socket (host, port, error);
349 _dbus_fd_set_close_on_exec (listen_fd);
353 _dbus_string_free (&address);
357 server = _dbus_server_new_for_fd (listen_fd, &address);
360 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
362 _dbus_string_free (&address);
366 _dbus_string_free (&address);