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);
87 if (transport == NULL)
93 /* note that client_fd is now owned by the transport, and will be
94 * closed on transport disconnection/finalization
97 connection = _dbus_connection_new_for_transport (transport);
98 _dbus_transport_unref (transport);
100 if (connection == NULL)
103 _dbus_connection_set_connection_counter (connection,
104 server->connection_counter);
106 /* See if someone wants to handle this new connection,
107 * self-referencing for paranoia
109 if (server->new_connection_function)
111 dbus_server_ref (server);
113 (* server->new_connection_function) (server, connection,
114 server->new_connection_data);
115 dbus_server_unref (server);
118 /* If no one grabbed a reference, the connection will die. */
119 dbus_connection_unref (connection);
125 unix_handle_watch (DBusServer *server,
129 DBusServerUnix *unix_server = (DBusServerUnix*) server;
131 _dbus_assert (watch == unix_server->watch);
133 _dbus_verbose ("Handling client connection, flags 0x%x\n", flags);
135 if (flags & DBUS_WATCH_READABLE)
140 listen_fd = dbus_watch_get_fd (watch);
142 client_fd = _dbus_accept (listen_fd);
146 /* EINTR handled for us */
148 if (errno == EAGAIN || errno == EWOULDBLOCK)
149 _dbus_verbose ("No client available to accept after all\n");
151 _dbus_verbose ("Failed to accept a client connection: %s\n",
152 _dbus_strerror (errno));
156 _dbus_fd_set_close_on_exec (client_fd);
158 if (!handle_new_client_fd (server, client_fd))
159 _dbus_verbose ("Rejected client connection due to lack of memory\n");
163 if (flags & DBUS_WATCH_ERROR)
164 _dbus_verbose ("Error on server listening socket\n");
166 if (flags & DBUS_WATCH_HANGUP)
167 _dbus_verbose ("Hangup on server listening socket\n");
173 unix_disconnect (DBusServer *server)
175 DBusServerUnix *unix_server = (DBusServerUnix*) server;
177 if (unix_server->watch)
179 _dbus_server_remove_watch (server,
181 _dbus_watch_unref (unix_server->watch);
182 unix_server->watch = NULL;
185 close (unix_server->fd);
186 unix_server->fd = -1;
189 static DBusServerVTable unix_vtable = {
196 * Creates a new server listening on the given file descriptor. The
197 * file descriptor should be nonblocking (use
198 * _dbus_set_fd_nonblocking() to make it so). The file descriptor
199 * should be listening for connections, that is, listen() should have
200 * been successfully invoked on it. The server will use accept() to
201 * accept new client connections.
203 * @param fd the file descriptor.
204 * @returns the new server, or #NULL if no memory.
208 _dbus_server_new_for_fd (int fd)
210 DBusServerUnix *unix_server;
213 watch = _dbus_watch_new (fd,
219 unix_server = dbus_new0 (DBusServerUnix, 1);
220 if (unix_server == NULL)
222 _dbus_watch_unref (watch);
226 if (!_dbus_server_init_base (&unix_server->base,
229 _dbus_watch_unref (watch);
230 dbus_free (unix_server);
234 if (!_dbus_server_add_watch (&unix_server->base,
237 _dbus_server_finalize_base (&unix_server->base);
238 _dbus_watch_unref (watch);
239 dbus_free (unix_server);
243 unix_server->fd = fd;
244 unix_server->watch = watch;
246 return (DBusServer*) unix_server;
250 * Creates a new server listening on the given Unix domain socket.
252 * @param path the path for the domain socket.
253 * @param result location to store reason for failure.
254 * @returns the new server, or #NULL on failure.
257 _dbus_server_new_for_domain_socket (const char *path,
258 DBusResultCode *result)
263 listen_fd = _dbus_listen_unix_socket (path, result);
264 _dbus_fd_set_close_on_exec (listen_fd);
269 server = _dbus_server_new_for_fd (listen_fd);
272 dbus_set_result (result, DBUS_RESULT_NO_MEMORY);
281 * Creates a new server listening on the given hostname and port
283 * @param host the hostname to listen on.
284 * @param port the port to listen on.
285 * @param result location to store reason for failure.
286 * @returns the new server, or #NULL on failure.
289 _dbus_server_new_for_tcp_socket (const char *host,
291 DBusResultCode *result)
296 listen_fd = _dbus_listen_tcp_socket (host, port, result);
297 _dbus_fd_set_close_on_exec (listen_fd);
302 server = _dbus_server_new_for_fd (listen_fd);
305 dbus_set_result (result, DBUS_RESULT_NO_MEMORY);