1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-server-unix.c Server implementation for Unix network protocols.
4 * Copyright (C) 2002, 2003, 2004 Red Hat Inc.
6 * Licensed under the Academic Free License version 2.1
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 _dbus_server_finalize_base (server);
64 dbus_free (unix_server->socket_name);
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_and_unlock (DBusServer *server,
78 DBusConnection *connection;
79 DBusTransport *transport;
80 DBusNewConnectionFunction new_connection_function;
81 void *new_connection_data;
83 _dbus_verbose ("Creating new client connection with fd %d\n", client_fd);
85 HAVE_LOCK_CHECK (server);
87 if (!_dbus_set_fd_nonblocking (client_fd, NULL))
89 SERVER_UNLOCK (server);
93 transport = _dbus_transport_new_for_fd (client_fd, TRUE, NULL);
94 if (transport == NULL)
97 SERVER_UNLOCK (server);
101 if (!_dbus_transport_set_auth_mechanisms (transport,
102 (const char **) server->auth_mechanisms))
104 _dbus_transport_unref (transport);
105 SERVER_UNLOCK (server);
109 /* note that client_fd is now owned by the transport, and will be
110 * closed on transport disconnection/finalization
113 connection = _dbus_connection_new_for_transport (transport);
114 _dbus_transport_unref (transport);
115 transport = NULL; /* now under the connection lock */
117 if (connection == NULL)
119 SERVER_UNLOCK (server);
123 /* See if someone wants to handle this new connection, self-referencing
126 new_connection_function = server->new_connection_function;
127 new_connection_data = server->new_connection_data;
129 _dbus_server_ref_unlocked (server);
130 SERVER_UNLOCK (server);
132 if (new_connection_function)
134 (* new_connection_function) (server, connection,
135 new_connection_data);
136 dbus_server_unref (server);
139 /* If no one grabbed a reference, the connection will die. */
140 dbus_connection_unref (connection);
146 unix_handle_watch (DBusWatch *watch,
150 DBusServer *server = data;
151 DBusServerUnix *unix_server = data;
153 SERVER_LOCK (server);
155 _dbus_assert (watch == unix_server->watch);
157 _dbus_verbose ("Handling client connection, flags 0x%x\n", flags);
159 if (flags & DBUS_WATCH_READABLE)
164 listen_fd = dbus_watch_get_fd (watch);
166 client_fd = _dbus_accept (listen_fd);
170 /* EINTR handled for us */
172 if (errno == EAGAIN || errno == EWOULDBLOCK)
173 _dbus_verbose ("No client available to accept after all\n");
175 _dbus_verbose ("Failed to accept a client connection: %s\n",
176 _dbus_strerror (errno));
178 SERVER_UNLOCK (server);
182 _dbus_fd_set_close_on_exec (client_fd);
184 if (!handle_new_client_fd_and_unlock (server, client_fd))
185 _dbus_verbose ("Rejected client connection due to lack of memory\n");
189 if (flags & DBUS_WATCH_ERROR)
190 _dbus_verbose ("Error on server listening socket\n");
192 if (flags & DBUS_WATCH_HANGUP)
193 _dbus_verbose ("Hangup on server listening socket\n");
199 unix_disconnect (DBusServer *server)
201 DBusServerUnix *unix_server = (DBusServerUnix*) server;
203 if (unix_server->watch)
205 _dbus_server_remove_watch (server,
207 _dbus_watch_unref (unix_server->watch);
208 unix_server->watch = NULL;
211 close (unix_server->fd);
212 unix_server->fd = -1;
214 if (unix_server->socket_name != NULL)
217 _dbus_string_init_const (&tmp, unix_server->socket_name);
218 _dbus_delete_file (&tmp, NULL);
222 static DBusServerVTable unix_vtable = {
228 * Creates a new server listening on the given file descriptor. The
229 * file descriptor should be nonblocking (use
230 * _dbus_set_fd_nonblocking() to make it so). The file descriptor
231 * should be listening for connections, that is, listen() should have
232 * been successfully invoked on it. The server will use accept() to
233 * accept new client connections.
235 * @param fd the file descriptor.
236 * @param address the server's address
237 * @returns the new server, or #NULL if no memory.
241 _dbus_server_new_for_fd (int fd,
242 const DBusString *address)
244 DBusServerUnix *unix_server;
247 unix_server = dbus_new0 (DBusServerUnix, 1);
248 if (unix_server == NULL)
251 watch = _dbus_watch_new (fd,
254 unix_handle_watch, unix_server,
258 dbus_free (unix_server);
262 if (!_dbus_server_init_base (&unix_server->base,
263 &unix_vtable, address))
265 _dbus_watch_unref (watch);
266 dbus_free (unix_server);
270 #ifndef DBUS_DISABLE_CHECKS
271 unix_server->base.have_server_lock = TRUE;
274 if (!_dbus_server_add_watch (&unix_server->base,
277 _dbus_server_finalize_base (&unix_server->base);
278 _dbus_watch_unref (watch);
279 dbus_free (unix_server);
283 #ifndef DBUS_DISABLE_CHECKS
284 unix_server->base.have_server_lock = FALSE;
287 unix_server->fd = fd;
288 unix_server->watch = watch;
290 return (DBusServer*) unix_server;
294 * Creates a new server listening on the given Unix domain socket.
296 * @param path the path for the domain socket.
297 * @param abstract #TRUE to use abstract socket namespace
298 * @param error location to store reason for failure.
299 * @returns the new server, or #NULL on failure.
302 _dbus_server_new_for_domain_socket (const char *path,
303 dbus_bool_t abstract,
307 DBusServerUnix *unix_server;
313 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
315 if (!_dbus_string_init (&address))
317 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
321 _dbus_string_init_const (&path_str, path);
323 !_dbus_string_append (&address, "unix:abstract=")) ||
325 !_dbus_string_append (&address, "unix:path=")) ||
326 !_dbus_address_append_escaped (&address, &path_str))
328 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
332 path_copy = _dbus_strdup (path);
333 if (path_copy == NULL)
335 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
339 listen_fd = _dbus_listen_unix_socket (path, abstract, error);
340 _dbus_fd_set_close_on_exec (listen_fd);
344 _DBUS_ASSERT_ERROR_IS_SET (error);
348 server = _dbus_server_new_for_fd (listen_fd, &address);
351 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
355 unix_server = (DBusServerUnix*) server;
356 unix_server->socket_name = path_copy;
358 _dbus_string_free (&address);
363 _dbus_close (listen_fd, NULL);
365 dbus_free (path_copy);
367 _dbus_string_free (&address);
373 * Creates a new server listening on the given hostname and port.
374 * If the hostname is NULL, listens on localhost.
376 * @param host the hostname to listen on.
377 * @param port the port to listen on.
378 * @param error location to store reason for failure.
379 * @returns the new server, or #NULL on failure.
382 _dbus_server_new_for_tcp_socket (const char *host,
391 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
393 if (!_dbus_string_init (&address))
395 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
402 _dbus_string_init_const (&host_str, host);
403 if (!_dbus_string_append (&address, "tcp:host=") ||
404 !_dbus_address_append_escaped (&address, &host_str) ||
405 !_dbus_string_append (&address, ",port=") ||
406 !_dbus_string_append_int (&address, port))
408 _dbus_string_free (&address);
409 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
413 listen_fd = _dbus_listen_tcp_socket (host, port, error);
414 _dbus_fd_set_close_on_exec (listen_fd);
418 _dbus_string_free (&address);
422 server = _dbus_server_new_for_fd (listen_fd, &address);
425 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
427 _dbus_string_free (&address);
431 _dbus_string_free (&address);