D-Bus: dbus-server-unix.c Source File

D-Bus 1.8.16

- Main Page
- Related Pages
- Modules
- Data Structures
- Files

- File List

dbus-server-unix.c
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-server-unix.c Server implementation for Unix network protocols.
3 *
4 * Copyright (C) 2002, 2003, 2004 Red Hat Inc.
5 *
6 * Licensed under the Academic Free License version 2.1
7 *
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.
12 *
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.
17 *
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 */
23
24 #include <config.h>
25 #include "dbus-internals.h"
26 #include "dbus-server-unix.h"
27 #include "dbus-server-socket.h"
28 #include "dbus-server-launchd.h"
29 #include "dbus-transport-unix.h"
30 #include "dbus-connection-internal.h"
31 #include "dbus-sysdeps-unix.h"
32 #include "dbus-string.h"
33
53 DBusServerListenResult
54 _dbus_server_listen_platform_specific (DBusAddressEntry *entry,
55 DBusServer **server_p,
56 DBusError *error)
57 {
58 const char *method;
59
60 *server_p = NULL;
61
62 method = dbus_address_entry_get_method (entry);
63
64 if (strcmp (method, "unix") == 0)
65 {
66 const char *path = dbus_address_entry_get_value (entry, "path");
67 const char *tmpdir = dbus_address_entry_get_value (entry, "tmpdir");
68 const char *abstract = dbus_address_entry_get_value (entry, "abstract");
69
70 if (path == NULL && tmpdir == NULL && abstract == NULL)
71 {
72 _dbus_set_bad_address(error, "unix",
73 "path or tmpdir or abstract",
74 NULL);
75 return DBUS_SERVER_LISTEN_BAD_ADDRESS;
76 }
77
78 if ((path && tmpdir) ||
79 (path && abstract) ||
80 (tmpdir && abstract))
81 {
82 _dbus_set_bad_address(error, NULL, NULL,
83 "cannot specify two of \"path\" and \"tmpdir\" and \"abstract\" at the same time");
84 return DBUS_SERVER_LISTEN_BAD_ADDRESS;
85 }
86
87 if (tmpdir != NULL)
88 {
89 DBusString full_path;
90 DBusString filename;
91
92 if (!_dbus_string_init (&full_path))
93 {
94 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
95 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
96 }
97
98 if (!_dbus_string_init (&filename))
99 {
100 _dbus_string_free (&full_path);
101 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
102 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
103 }
104
105 if (!_dbus_string_append (&filename,
106 "dbus-") ||
107 !_dbus_generate_random_ascii (&filename, 10) ||
108 !_dbus_string_append (&full_path, tmpdir) ||
109 !_dbus_concat_dir_and_file (&full_path, &filename))
110 {
111 _dbus_string_free (&full_path);
112 _dbus_string_free (&filename);
113 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
114 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
115 }
116
117 /* Always use abstract namespace if possible with tmpdir */
118
119 *server_p =
120 _dbus_server_new_for_domain_socket (_dbus_string_get_const_data (&full_path),
121 #ifdef HAVE_ABSTRACT_SOCKETS
122 TRUE,
123 #else
124 FALSE,
125 #endif
126 error);
127
128 _dbus_string_free (&full_path);
129 _dbus_string_free (&filename);
130 }
131 else
132 {
133 if (path)
134 *server_p = _dbus_server_new_for_domain_socket (path, FALSE, error);
135 else
136 *server_p = _dbus_server_new_for_domain_socket (abstract, TRUE, error);
137 }
138
139 if (*server_p != NULL)
140 {
141 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
142 return DBUS_SERVER_LISTEN_OK;
143 }
144 else
145 {
146 _DBUS_ASSERT_ERROR_IS_SET(error);
147 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
148 }
149 }
150 else if (strcmp (method, "systemd") == 0)
151 {
152 int i, n, *fds;
153 DBusString address;
154
155 n = _dbus_listen_systemd_sockets (&fds, error);
156 if (n < 0)
157 {
158 _DBUS_ASSERT_ERROR_IS_SET (error);
159 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
160 }
161
162 if (!_dbus_string_init (&address))
163 goto systemd_oom;
164
165 for (i = 0; i < n; i++)
166 {
167 if (i > 0)
168 {
169 if (!_dbus_string_append (&address, ";"))
170 goto systemd_oom;
171 }
172 if (!_dbus_append_address_from_socket (fds[i], &address, error))
173 goto systemd_err;
174 }
175
176 *server_p = _dbus_server_new_for_socket (fds, n, &address, NULL);
177 if (*server_p == NULL)
178 goto systemd_oom;
179
180 dbus_free (fds);
181
182 return DBUS_SERVER_LISTEN_OK;
183 systemd_oom:
184 _DBUS_SET_OOM (error);
185 systemd_err:
186 for (i = 0; i < n; i++)
187 {
188 _dbus_close_socket (fds[i], NULL);
189 }
190 dbus_free (fds);
191 _dbus_string_free (&address);
192
193 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
194 }
195 #ifdef DBUS_ENABLE_LAUNCHD
196 else if (strcmp (method, "launchd") == 0)
197 {
198 const char *launchd_env_var = dbus_address_entry_get_value (entry, "env");
199 if (launchd_env_var == NULL)
200 {
201 _dbus_set_bad_address (error, "launchd", "env", NULL);
202 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
203 }
204 *server_p = _dbus_server_new_for_launchd (launchd_env_var, error);
205
206 if (*server_p != NULL)
207 {
208 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
209 return DBUS_SERVER_LISTEN_OK;
210 }
211 else
212 {
213 _DBUS_ASSERT_ERROR_IS_SET(error);
214 return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
215 }
216 }
217 #endif
218 else
219 {
220 /* If we don't handle the method, we return NULL with the
221 * error unset
222 */
223 _DBUS_ASSERT_ERROR_IS_CLEAR(error);
224 return DBUS_SERVER_LISTEN_NOT_HANDLED;
225 }
226 }
227
236 DBusServer*
237 _dbus_server_new_for_domain_socket (const char *path,
238 dbus_bool_t abstract,
239 DBusError *error)
240 {
241 DBusServer *server;
242 int listen_fd;
243 DBusString address;
244 char *path_copy;
245 DBusString path_str;
246
247 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
248
249 if (!_dbus_string_init (&address))
250 {
251 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
252 return NULL;
253 }
254
255 _dbus_string_init_const (&path_str, path);
256 if ((abstract &&
257 !_dbus_string_append (&address, "unix:abstract=")) ||
258 (!abstract &&
259 !_dbus_string_append (&address, "unix:path=")) ||
260 !_dbus_address_append_escaped (&address, &path_str))
261 {
262 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
263 goto failed_0;
264 }
265
266 if (abstract)
267 {
268 path_copy = NULL;
269 }
270 else
271 {
272 path_copy = _dbus_strdup (path);
273 if (path_copy == NULL)
274 {
275 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
276 goto failed_0;
277 }
278 }
279
280 listen_fd = _dbus_listen_unix_socket (path, abstract, error);
281
282 if (listen_fd < 0)
283 {
284 _DBUS_ASSERT_ERROR_IS_SET (error);
285 goto failed_1;
286 }
287
288 server = _dbus_server_new_for_socket (&listen_fd, 1, &address, 0);
289 if (server == NULL)
290 {
291 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
292 goto failed_2;
293 }
294
295 if (path_copy != NULL)
296 _dbus_server_socket_own_filename(server, path_copy);
297
298 _dbus_string_free (&address);
299
300 return server;
301
302 failed_2:
303 _dbus_close_socket (listen_fd, NULL);
304 failed_1:
305 dbus_free (path_copy);
306 failed_0:
307 _dbus_string_free (&address);
308
309 return NULL;
310 }
311
_dbus_string_append
dbus_bool_t _dbus_string_append(DBusString *str, const char *buffer)
Appends a nul-terminated C-style string to a DBusString.
Definition: dbus-string.c:918
NULL
#define NULL
A null pointer, defined appropriately for C or C++.
dbus_free
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
Definition: dbus-memory.c:701
_dbus_server_new_for_launchd
DBusServer * _dbus_server_new_for_launchd(const char *launchd_env_var, DBusError *error)
Creates a new server from launchd.
Definition: dbus-server-launchd.c:65
_dbus_append_address_from_socket
dbus_bool_t _dbus_append_address_from_socket(int fd, DBusString *address, DBusError *error)
Read the address from the socket and append it to the string.
Definition: dbus-sysdeps-unix.c:4106
DBusServer
Internals of DBusServer object.
Definition: dbus-server-protected.h:56
dbus_address_entry_get_method
const char * dbus_address_entry_get_method(DBusAddressEntry *entry)
Returns the method string of an address entry.
Definition: dbus-address.c:227
_dbus_string_init
dbus_bool_t _dbus_string_init(DBusString *str)
Initializes a string.
Definition: dbus-string.c:175
_dbus_server_listen_platform_specific
DBusServerListenResult _dbus_server_listen_platform_specific(DBusAddressEntry *entry, DBusServer **server_p, DBusError *error)
Tries to interpret the address entry in a platform-specific way, creating a platform-specific server ...
Definition: dbus-server-unix.c:54
dbus_address_entry_get_value
const char * dbus_address_entry_get_value(DBusAddressEntry *entry, const char *key)
Returns a value from a key of an entry.
Definition: dbus-address.c:244
_dbus_concat_dir_and_file
dbus_bool_t _dbus_concat_dir_and_file(DBusString *dir, const DBusString *next_component)
Appends the given filename to the given directory.
Definition: dbus-sysdeps-unix.c:2758
_dbus_generate_random_ascii
dbus_bool_t _dbus_generate_random_ascii(DBusString *str, int n_bytes)
Generates the given number of random bytes, where the bytes are chosen from the alphanumeric ASCII su...
Definition: dbus-sysdeps.c:575
DBusString
Definition: dbus-string.h:42
dbus_bool_t
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition: dbus-types.h:35
_dbus_string_init_const
void _dbus_string_init_const(DBusString *str, const char *value)
Initializes a constant string.
Definition: dbus-string.c:190
_dbus_server_socket_own_filename
void _dbus_server_socket_own_filename(DBusServer *server, char *filename)
This is a bad hack since it's really unix domain socket specific.
Definition: dbus-server-socket.c:579
_dbus_server_new_for_socket
DBusServer * _dbus_server_new_for_socket(int *fds, int n_fds, const DBusString *address, DBusNonceFile *noncefile)
Creates a new server listening on the given file descriptor.
Definition: dbus-server-socket.c:280
DBusAddressEntry
Internals of DBusAddressEntry.
Definition: dbus-address.c:43
_dbus_set_bad_address
void _dbus_set_bad_address(DBusError *error, const char *address_problem_type, const char *address_problem_field, const char *address_problem_other)
Sets DBUS_ERROR_BAD_ADDRESS.
Definition: dbus-address.c:65
DBusError
Object representing an exception.
Definition: dbus-errors.h:48
_dbus_address_append_escaped
dbus_bool_t _dbus_address_append_escaped(DBusString *escaped, const DBusString *unescaped)
Appends an escaped version of one string to another string, using the D-Bus address escaping mechanis...
Definition: dbus-address.c:104
dbus_set_error
void dbus_set_error(DBusError *error, const char *name, const char *format,...)
Assigns an error name and message to a DBusError.
Definition: dbus-errors.c:354
_dbus_string_free
void _dbus_string_free(DBusString *str)
Frees a string created by _dbus_string_init().
Definition: dbus-string.c:242
TRUE
#define TRUE
Expands to "1".
_dbus_server_new_for_domain_socket
DBusServer * _dbus_server_new_for_domain_socket(const char *path, dbus_bool_t abstract, DBusError *error)
Creates a new server listening on the given Unix domain socket.
Definition: dbus-server-unix.c:237
DBUS_ERROR_NO_MEMORY
#define DBUS_ERROR_NO_MEMORY
There was not enough memory to complete an operation.
Definition: dbus-protocol.h:352
FALSE
#define FALSE
Expands to "0".
_dbus_strdup
char * _dbus_strdup(const char *str)
Duplicates a string.
Definition: dbus-internals.c:527
_dbus_close_socket
dbus_bool_t _dbus_close_socket(int fd, DBusError *error)
Closes a socket.
Definition: dbus-sysdeps-unix.c:201
_dbus_listen_unix_socket
int _dbus_listen_unix_socket(const char *path, dbus_bool_t abstract, DBusError *error)
Creates a socket and binds it to the given path, then listens on the socket.
Definition: dbus-sysdeps-unix.c:1032
_dbus_listen_systemd_sockets
int _dbus_listen_systemd_sockets(int **fds, DBusError *error)
Acquires one or more sockets passed in from systemd.
Definition: dbus-sysdeps-unix.c:1159