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>
30 #include <sys/socket.h>
36 * @defgroup DBusServerUnix DBusServer implementations for UNIX
37 * @ingroup DBusInternals
38 * @brief Implementation details of DBusServer on UNIX
44 * Opaque object representing a Unix server implementation.
46 typedef struct DBusServerUnix DBusServerUnix;
49 * Implementation details of DBusServerUnix. All members
54 DBusServer base; /**< Parent class members. */
55 int fd; /**< File descriptor or -1 if disconnected. */
56 DBusWatch *watch; /**< File descriptor watch. */
60 unix_finalize (DBusServer *server)
62 DBusServerUnix *unix_server = (DBusServerUnix*) server;
64 _dbus_server_finalize_base (server);
66 if (unix_server->watch)
67 _dbus_watch_unref (unix_server->watch);
73 handle_new_client_fd (DBusServer *server,
76 DBusConnection *connection;
77 DBusTransport *transport;
79 _dbus_verbose ("Creating new client connection with fd %d\n", client_fd);
81 if (!_dbus_set_fd_nonblocking (client_fd, NULL))
84 transport = _dbus_transport_new_for_fd (client_fd);
85 if (transport == NULL)
91 /* note that client_fd is now owned by the transport, and will be
92 * closed on transport disconnection/finalization
95 connection = _dbus_connection_new_for_transport (transport);
96 _dbus_transport_unref (transport);
98 if (connection == NULL)
101 /* See if someone wants to handle this new connection,
102 * self-referencing for paranoia
104 if (server->new_connection_function)
106 dbus_server_ref (server);
108 (* server->new_connection_function) (server, connection,
109 server->new_connection_data);
110 dbus_server_unref (server);
113 /* If no one grabbed a reference, the connection will die. */
114 dbus_connection_unref (connection);
118 unix_handle_watch (DBusServer *server,
122 DBusServerUnix *unix_server = (DBusServerUnix*) server;
124 _dbus_assert (watch == unix_server->watch);
126 _dbus_verbose ("Handling client connection, flags 0x%x\n", flags);
128 if (flags & DBUS_WATCH_READABLE)
133 listen_fd = dbus_watch_get_fd (watch);
136 client_fd = accept (listen_fd, NULL, NULL);
142 else if (errno == EAGAIN || errno == EWOULDBLOCK)
143 _dbus_verbose ("No client available to accept after all\n");
145 _dbus_verbose ("Failed to accept a client connection: %s\n",
146 _dbus_strerror (errno));
150 handle_new_client_fd (server, client_fd);
154 if (flags & DBUS_WATCH_ERROR)
155 _dbus_verbose ("Error on server listening socket\n");
157 if (flags & DBUS_WATCH_HANGUP)
158 _dbus_verbose ("Hangup on server listening socket\n");
162 unix_disconnect (DBusServer *server)
164 DBusServerUnix *unix_server = (DBusServerUnix*) server;
166 if (unix_server->watch)
168 _dbus_server_remove_watch (server,
170 _dbus_watch_unref (unix_server->watch);
171 unix_server->watch = NULL;
174 close (unix_server->fd);
175 unix_server->fd = -1;
178 static DBusServerVTable unix_vtable = {
185 * Creates a new server listening on the given file descriptor. The
186 * file descriptor should be nonblocking (use
187 * _dbus_set_fd_nonblocking() to make it so). The file descriptor
188 * should be listening for connections, that is, listen() should have
189 * been successfully invoked on it. The server will use accept() to
190 * accept new client connections.
192 * @param fd the file descriptor.
193 * @returns the new server, or #NULL if no memory.
197 _dbus_server_new_for_fd (int fd)
199 DBusServerUnix *unix_server;
202 watch = _dbus_watch_new (fd,
203 DBUS_WATCH_READABLE);
207 unix_server = dbus_new0 (DBusServerUnix, 1);
208 if (unix_server == NULL)
210 _dbus_watch_unref (watch);
214 if (!_dbus_server_init_base (&unix_server->base,
217 _dbus_watch_unref (watch);
218 dbus_free (unix_server);
222 if (!_dbus_server_add_watch (&unix_server->base,
225 _dbus_server_finalize_base (&unix_server->base);
226 _dbus_watch_unref (watch);
227 dbus_free (unix_server);
231 unix_server->fd = fd;
232 unix_server->watch = watch;
234 return (DBusServer*) unix_server;
238 * Creates a new server listening on the given Unix domain socket.
240 * @param path the path for the domain socket.
241 * @param result location to store reason for failure.
242 * @returns the new server, or #NULL on failure.
245 _dbus_server_new_for_domain_socket (const char *path,
246 DBusResultCode *result)
250 struct sockaddr_un addr;
252 listen_fd = socket (AF_LOCAL, SOCK_STREAM, 0);
256 dbus_set_result (result, _dbus_result_from_errno (errno));
257 _dbus_verbose ("Failed to create socket \"%s\": %s\n",
258 path, _dbus_strerror (errno));
262 if (!_dbus_set_fd_nonblocking (listen_fd, result))
269 addr.sun_family = AF_LOCAL;
270 strncpy (addr.sun_path, path, _DBUS_MAX_SUN_PATH_LENGTH);
271 addr.sun_path[_DBUS_MAX_SUN_PATH_LENGTH] = '\0';
273 if (bind (listen_fd, (struct sockaddr*) &addr, SUN_LEN (&addr)) < 0)
275 dbus_set_result (result, _dbus_result_from_errno (errno));
276 _dbus_verbose ("Failed to bind socket \"%s\": %s\n",
277 path, _dbus_strerror (errno));
282 if (listen (listen_fd, 30 /* backlog */) < 0)
284 dbus_set_result (result, _dbus_result_from_errno (errno));
285 _dbus_verbose ("Failed to listen on socket \"%s\": %s\n",
286 path, _dbus_strerror (errno));
291 server = _dbus_server_new_for_fd (listen_fd);
294 dbus_set_result (result, DBUS_RESULT_NO_MEMORY);