1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-server-unix.c Server implementation for Unix network protocols.
4 * Copyright (C) 2002, 2003 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 "dbus-string.h"
29 #include <sys/types.h>
33 * @defgroup DBusServerUnix DBusServer implementations for UNIX
34 * @ingroup DBusInternals
35 * @brief Implementation details of DBusServer on UNIX
41 * Opaque object representing a Unix server implementation.
43 typedef struct DBusServerUnix DBusServerUnix;
46 * Implementation details of DBusServerUnix. All members
51 DBusServer base; /**< Parent class members. */
52 int fd; /**< File descriptor or -1 if disconnected. */
53 DBusWatch *watch; /**< File descriptor watch. */
54 char *socket_name; /**< Name of domain socket, to unlink if appropriate */
58 unix_finalize (DBusServer *server)
60 DBusServerUnix *unix_server = (DBusServerUnix*) server;
62 if (unix_server->watch)
63 _dbus_watch_unref (unix_server->watch);
65 dbus_free (unix_server->socket_name);
67 _dbus_server_finalize_base (server);
73 * @todo unreffing the connection at the end may cause
74 * us to drop the last ref to the connection before
75 * disconnecting it. That is invalid.
77 /* Return value is just for memory, not other failures. */
79 handle_new_client_fd (DBusServer *server,
82 DBusConnection *connection;
83 DBusTransport *transport;
85 _dbus_verbose ("Creating new client connection with fd %d\n", client_fd);
87 if (!_dbus_set_fd_nonblocking (client_fd, NULL))
90 transport = _dbus_transport_new_for_fd (client_fd, TRUE, NULL);
91 if (transport == NULL)
97 if (!_dbus_transport_set_auth_mechanisms (transport,
98 (const char **) server->auth_mechanisms))
100 _dbus_transport_unref (transport);
104 /* note that client_fd is now owned by the transport, and will be
105 * closed on transport disconnection/finalization
108 connection = _dbus_connection_new_for_transport (transport);
109 _dbus_transport_unref (transport);
111 if (connection == NULL)
114 /* See if someone wants to handle this new connection,
115 * self-referencing for paranoia
117 if (server->new_connection_function)
119 dbus_server_ref (server);
121 (* server->new_connection_function) (server, connection,
122 server->new_connection_data);
123 dbus_server_unref (server);
126 /* If no one grabbed a reference, the connection will die. */
127 dbus_connection_unref (connection);
133 unix_handle_watch (DBusWatch *watch,
137 DBusServer *server = data;
138 DBusServerUnix *unix_server = data;
140 _dbus_assert (watch == unix_server->watch);
142 _dbus_verbose ("Handling client connection, flags 0x%x\n", flags);
144 if (flags & DBUS_WATCH_READABLE)
149 listen_fd = dbus_watch_get_fd (watch);
151 client_fd = _dbus_accept (listen_fd);
155 /* EINTR handled for us */
157 if (errno == EAGAIN || errno == EWOULDBLOCK)
158 _dbus_verbose ("No client available to accept after all\n");
160 _dbus_verbose ("Failed to accept a client connection: %s\n",
161 _dbus_strerror (errno));
165 _dbus_fd_set_close_on_exec (client_fd);
167 if (!handle_new_client_fd (server, client_fd))
168 _dbus_verbose ("Rejected client connection due to lack of memory\n");
172 if (flags & DBUS_WATCH_ERROR)
173 _dbus_verbose ("Error on server listening socket\n");
175 if (flags & DBUS_WATCH_HANGUP)
176 _dbus_verbose ("Hangup on server listening socket\n");
182 unix_disconnect (DBusServer *server)
184 DBusServerUnix *unix_server = (DBusServerUnix*) server;
186 if (unix_server->watch)
188 _dbus_server_remove_watch (server,
190 _dbus_watch_unref (unix_server->watch);
191 unix_server->watch = NULL;
194 close (unix_server->fd);
195 unix_server->fd = -1;
197 if (unix_server->socket_name != NULL)
200 _dbus_string_init_const (&tmp, unix_server->socket_name);
201 _dbus_delete_file (&tmp, NULL);
205 static DBusServerVTable unix_vtable = {
211 * Creates a new server listening on the given file descriptor. The
212 * file descriptor should be nonblocking (use
213 * _dbus_set_fd_nonblocking() to make it so). The file descriptor
214 * should be listening for connections, that is, listen() should have
215 * been successfully invoked on it. The server will use accept() to
216 * accept new client connections.
218 * @param fd the file descriptor.
219 * @param address the server's address
220 * @returns the new server, or #NULL if no memory.
224 _dbus_server_new_for_fd (int fd,
225 const DBusString *address)
227 DBusServerUnix *unix_server;
230 unix_server = dbus_new0 (DBusServerUnix, 1);
231 if (unix_server == NULL)
234 watch = _dbus_watch_new (fd,
237 unix_handle_watch, unix_server,
241 dbus_free (unix_server);
245 if (!_dbus_server_init_base (&unix_server->base,
246 &unix_vtable, address))
248 _dbus_watch_unref (watch);
249 dbus_free (unix_server);
253 if (!_dbus_server_add_watch (&unix_server->base,
256 _dbus_server_finalize_base (&unix_server->base);
257 _dbus_watch_unref (watch);
258 dbus_free (unix_server);
262 unix_server->fd = fd;
263 unix_server->watch = watch;
265 return (DBusServer*) unix_server;
269 * Creates a new server listening on the given Unix domain socket.
271 * @param path the path for the domain socket.
272 * @param abstract #TRUE to use abstract socket namespace
273 * @param error location to store reason for failure.
274 * @returns the new server, or #NULL on failure.
277 _dbus_server_new_for_domain_socket (const char *path,
278 dbus_bool_t abstract,
282 DBusServerUnix *unix_server;
287 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
289 if (!_dbus_string_init (&address))
291 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
296 !_dbus_string_append (&address, "unix:abstract=")) ||
298 !_dbus_string_append (&address, "unix:path=")) ||
299 !_dbus_string_append (&address, path))
301 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
305 path_copy = _dbus_strdup (path);
306 if (path_copy == NULL)
308 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
312 listen_fd = _dbus_listen_unix_socket (path, abstract, error);
313 _dbus_fd_set_close_on_exec (listen_fd);
317 _DBUS_ASSERT_ERROR_IS_SET (error);
321 server = _dbus_server_new_for_fd (listen_fd, &address);
324 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
328 unix_server = (DBusServerUnix*) server;
329 unix_server->socket_name = path_copy;
331 _dbus_string_free (&address);
336 _dbus_close (listen_fd, NULL);
338 dbus_free (path_copy);
340 _dbus_string_free (&address);
346 * Creates a new server listening on the given hostname and port.
347 * If the hostname is NULL, listens on localhost.
349 * @param host the hostname to listen on.
350 * @param port the port to listen on.
351 * @param error location to store reason for failure.
352 * @returns the new server, or #NULL on failure.
355 _dbus_server_new_for_tcp_socket (const char *host,
363 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
365 if (!_dbus_string_init (&address))
367 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
371 if (!_dbus_string_append (&address, "tcp:host=") ||
372 !_dbus_string_append (&address, host) ||
373 !_dbus_string_append (&address, ",port=") ||
374 !_dbus_string_append_int (&address, port))
376 _dbus_string_free (&address);
377 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
381 listen_fd = _dbus_listen_tcp_socket (host, port, error);
382 _dbus_fd_set_close_on_exec (listen_fd);
386 _dbus_string_free (&address);
390 server = _dbus_server_new_for_fd (listen_fd, &address);
393 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
395 _dbus_string_free (&address);
399 _dbus_string_free (&address);