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 (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 /* See if someone wants to handle this new connection,
111 * self-referencing for paranoia
113 if (server->new_connection_function)
115 dbus_server_ref (server);
117 (* server->new_connection_function) (server, connection,
118 server->new_connection_data);
119 dbus_server_unref (server);
122 /* If no one grabbed a reference, the connection will die. */
123 dbus_connection_unref (connection);
129 unix_handle_watch (DBusWatch *watch,
133 DBusServer *server = data;
134 DBusServerUnix *unix_server = data;
136 _dbus_assert (watch == unix_server->watch);
138 _dbus_verbose ("Handling client connection, flags 0x%x\n", flags);
140 if (flags & DBUS_WATCH_READABLE)
145 listen_fd = dbus_watch_get_fd (watch);
147 client_fd = _dbus_accept (listen_fd);
151 /* EINTR handled for us */
153 if (errno == EAGAIN || errno == EWOULDBLOCK)
154 _dbus_verbose ("No client available to accept after all\n");
156 _dbus_verbose ("Failed to accept a client connection: %s\n",
157 _dbus_strerror (errno));
161 _dbus_fd_set_close_on_exec (client_fd);
163 if (!handle_new_client_fd (server, client_fd))
164 _dbus_verbose ("Rejected client connection due to lack of memory\n");
168 if (flags & DBUS_WATCH_ERROR)
169 _dbus_verbose ("Error on server listening socket\n");
171 if (flags & DBUS_WATCH_HANGUP)
172 _dbus_verbose ("Hangup on server listening socket\n");
178 unix_disconnect (DBusServer *server)
180 DBusServerUnix *unix_server = (DBusServerUnix*) server;
182 if (unix_server->watch)
184 _dbus_server_remove_watch (server,
186 _dbus_watch_unref (unix_server->watch);
187 unix_server->watch = NULL;
190 close (unix_server->fd);
191 unix_server->fd = -1;
193 if (unix_server->socket_name != NULL)
196 _dbus_string_init_const (&tmp, unix_server->socket_name);
197 _dbus_delete_file (&tmp, NULL);
201 static DBusServerVTable unix_vtable = {
207 * Creates a new server listening on the given file descriptor. The
208 * file descriptor should be nonblocking (use
209 * _dbus_set_fd_nonblocking() to make it so). The file descriptor
210 * should be listening for connections, that is, listen() should have
211 * been successfully invoked on it. The server will use accept() to
212 * accept new client connections.
214 * @param fd the file descriptor.
215 * @param address the server's address
216 * @returns the new server, or #NULL if no memory.
220 _dbus_server_new_for_fd (int fd,
221 const DBusString *address)
223 DBusServerUnix *unix_server;
226 unix_server = dbus_new0 (DBusServerUnix, 1);
227 if (unix_server == NULL)
230 watch = _dbus_watch_new (fd,
233 unix_handle_watch, unix_server,
237 dbus_free (unix_server);
241 if (!_dbus_server_init_base (&unix_server->base,
242 &unix_vtable, address))
244 _dbus_watch_unref (watch);
245 dbus_free (unix_server);
249 if (!_dbus_server_add_watch (&unix_server->base,
252 _dbus_server_finalize_base (&unix_server->base);
253 _dbus_watch_unref (watch);
254 dbus_free (unix_server);
258 unix_server->fd = fd;
259 unix_server->watch = watch;
261 return (DBusServer*) unix_server;
265 * Creates a new server listening on the given Unix domain socket.
267 * @param path the path for the domain socket.
268 * @param abstract #TRUE to use abstract socket namespace
269 * @param error location to store reason for failure.
270 * @returns the new server, or #NULL on failure.
273 _dbus_server_new_for_domain_socket (const char *path,
274 dbus_bool_t abstract,
278 DBusServerUnix *unix_server;
283 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
285 if (!_dbus_string_init (&address))
287 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
292 !_dbus_string_append (&address, "unix:abstract=")) ||
294 !_dbus_string_append (&address, "unix:path=")) ||
295 !_dbus_string_append (&address, path))
297 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
301 path_copy = _dbus_strdup (path);
302 if (path_copy == NULL)
304 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
308 listen_fd = _dbus_listen_unix_socket (path, abstract, error);
309 _dbus_fd_set_close_on_exec (listen_fd);
313 _DBUS_ASSERT_ERROR_IS_SET (error);
317 server = _dbus_server_new_for_fd (listen_fd, &address);
320 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
324 unix_server = (DBusServerUnix*) server;
325 unix_server->socket_name = path_copy;
327 _dbus_string_free (&address);
332 _dbus_close (listen_fd, NULL);
334 dbus_free (path_copy);
336 _dbus_string_free (&address);
342 * Creates a new server listening on the given hostname and port.
343 * If the hostname is NULL, listens on localhost.
345 * @param host the hostname to listen on.
346 * @param port the port to listen on.
347 * @param error location to store reason for failure.
348 * @returns the new server, or #NULL on failure.
351 _dbus_server_new_for_tcp_socket (const char *host,
359 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
361 if (!_dbus_string_init (&address))
363 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
370 if (!_dbus_string_append (&address, "tcp:host=") ||
371 !_dbus_string_append (&address, host) ||
372 !_dbus_string_append (&address, ",port=") ||
373 !_dbus_string_append_int (&address, port))
375 _dbus_string_free (&address);
376 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
380 listen_fd = _dbus_listen_tcp_socket (host, port, error);
381 _dbus_fd_set_close_on_exec (listen_fd);
385 _dbus_string_free (&address);
389 server = _dbus_server_new_for_fd (listen_fd, &address);
392 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
394 _dbus_string_free (&address);
398 _dbus_string_free (&address);