1 | /* GIO - GLib Input, Output and Streaming Library |
2 | * |
3 | * Copyright © 2008 Christian Kellner, Samuel Cormier-Iijima |
4 | * Copyright © 2009 codethink |
5 | * Copyright © 2009 Red Hat, Inc |
6 | * |
7 | * This library is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * This library is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General |
18 | * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. |
19 | * |
20 | * Authors: Christian Kellner <gicmo@gnome.org> |
21 | * Samuel Cormier-Iijima <sciyoshi@gmail.com> |
22 | * Ryan Lortie <desrt@desrt.ca> |
23 | * Alexander Larsson <alexl@redhat.com> |
24 | */ |
25 | |
26 | #include "config.h" |
27 | #include "gsocketlistener.h" |
28 | |
29 | #include <gio/gioenumtypes.h> |
30 | #include <gio/gtask.h> |
31 | #include <gio/gcancellable.h> |
32 | #include <gio/gsocketaddress.h> |
33 | #include <gio/ginetaddress.h> |
34 | #include <gio/gioerror.h> |
35 | #include <gio/gsocket.h> |
36 | #include <gio/gsocketconnection.h> |
37 | #include <gio/ginetsocketaddress.h> |
38 | #include "glibintl.h" |
39 | #include "gmarshal-internal.h" |
40 | |
41 | |
42 | /** |
43 | * SECTION:gsocketlistener |
44 | * @title: GSocketListener |
45 | * @short_description: Helper for accepting network client connections |
46 | * @include: gio/gio.h |
47 | * @see_also: #GThreadedSocketService, #GSocketService. |
48 | * |
49 | * A #GSocketListener is an object that keeps track of a set |
50 | * of server sockets and helps you accept sockets from any of the |
51 | * socket, either sync or async. |
52 | * |
53 | * Add addresses and ports to listen on using g_socket_listener_add_address() |
54 | * and g_socket_listener_add_inet_port(). These will be listened on until |
55 | * g_socket_listener_close() is called. Dropping your final reference to the |
56 | * #GSocketListener will not cause g_socket_listener_close() to be called |
57 | * implicitly, as some references to the #GSocketListener may be held |
58 | * internally. |
59 | * |
60 | * If you want to implement a network server, also look at #GSocketService |
61 | * and #GThreadedSocketService which are subclasses of #GSocketListener |
62 | * that make this even easier. |
63 | * |
64 | * Since: 2.22 |
65 | */ |
66 | |
67 | enum |
68 | { |
69 | PROP_0, |
70 | PROP_LISTEN_BACKLOG |
71 | }; |
72 | |
73 | enum |
74 | { |
75 | EVENT, |
76 | LAST_SIGNAL |
77 | }; |
78 | |
79 | static guint signals[LAST_SIGNAL] = { 0 }; |
80 | |
81 | static GQuark source_quark = 0; |
82 | |
83 | struct _GSocketListenerPrivate |
84 | { |
85 | GPtrArray *sockets; |
86 | GMainContext *main_context; |
87 | int listen_backlog; |
88 | guint closed : 1; |
89 | }; |
90 | |
91 | G_DEFINE_TYPE_WITH_PRIVATE (GSocketListener, g_socket_listener, G_TYPE_OBJECT) |
92 | |
93 | static void |
94 | g_socket_listener_finalize (GObject *object) |
95 | { |
96 | GSocketListener *listener = G_SOCKET_LISTENER (object); |
97 | |
98 | if (listener->priv->main_context) |
99 | g_main_context_unref (context: listener->priv->main_context); |
100 | |
101 | /* Do not explicitly close the sockets. Instead, let them close themselves if |
102 | * their final reference is dropped, but keep them open if a reference is |
103 | * held externally to the GSocketListener (which is possible if |
104 | * g_socket_listener_add_socket() was used). |
105 | */ |
106 | g_ptr_array_free (array: listener->priv->sockets, TRUE); |
107 | |
108 | G_OBJECT_CLASS (g_socket_listener_parent_class) |
109 | ->finalize (object); |
110 | } |
111 | |
112 | static void |
113 | g_socket_listener_get_property (GObject *object, |
114 | guint prop_id, |
115 | GValue *value, |
116 | GParamSpec *pspec) |
117 | { |
118 | GSocketListener *listener = G_SOCKET_LISTENER (object); |
119 | |
120 | switch (prop_id) |
121 | { |
122 | case PROP_LISTEN_BACKLOG: |
123 | g_value_set_int (value, v_int: listener->priv->listen_backlog); |
124 | break; |
125 | |
126 | default: |
127 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
128 | } |
129 | } |
130 | |
131 | static void |
132 | g_socket_listener_set_property (GObject *object, |
133 | guint prop_id, |
134 | const GValue *value, |
135 | GParamSpec *pspec) |
136 | { |
137 | GSocketListener *listener = G_SOCKET_LISTENER (object); |
138 | |
139 | switch (prop_id) |
140 | { |
141 | case PROP_LISTEN_BACKLOG: |
142 | g_socket_listener_set_backlog (listener, listen_backlog: g_value_get_int (value)); |
143 | break; |
144 | |
145 | default: |
146 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
147 | } |
148 | } |
149 | |
150 | static void |
151 | g_socket_listener_class_init (GSocketListenerClass *klass) |
152 | { |
153 | GObjectClass *gobject_class G_GNUC_UNUSED = G_OBJECT_CLASS (klass); |
154 | |
155 | gobject_class->finalize = g_socket_listener_finalize; |
156 | gobject_class->set_property = g_socket_listener_set_property; |
157 | gobject_class->get_property = g_socket_listener_get_property; |
158 | g_object_class_install_property (oclass: gobject_class, property_id: PROP_LISTEN_BACKLOG, |
159 | pspec: g_param_spec_int (name: "listen-backlog" , |
160 | P_("Listen backlog" ), |
161 | P_("outstanding connections in the listen queue" ), |
162 | minimum: 0, |
163 | maximum: 2000, |
164 | default_value: 10, |
165 | flags: G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
166 | |
167 | /** |
168 | * GSocketListener::event: |
169 | * @listener: the #GSocketListener |
170 | * @event: the event that is occurring |
171 | * @socket: the #GSocket the event is occurring on |
172 | * |
173 | * Emitted when @listener's activity on @socket changes state. |
174 | * Note that when @listener is used to listen on both IPv4 and |
175 | * IPv6, a separate set of signals will be emitted for each, and |
176 | * the order they happen in is undefined. |
177 | * |
178 | * Since: 2.46 |
179 | */ |
180 | signals[EVENT] = |
181 | g_signal_new (I_("event" ), |
182 | G_TYPE_FROM_CLASS (gobject_class), |
183 | signal_flags: G_SIGNAL_RUN_LAST, |
184 | G_STRUCT_OFFSET (GSocketListenerClass, event), |
185 | NULL, NULL, |
186 | c_marshaller: _g_cclosure_marshal_VOID__ENUM_OBJECT, |
187 | G_TYPE_NONE, n_params: 2, |
188 | G_TYPE_SOCKET_LISTENER_EVENT, |
189 | G_TYPE_SOCKET); |
190 | g_signal_set_va_marshaller (signal_id: signals[EVENT], |
191 | G_TYPE_FROM_CLASS (gobject_class), |
192 | va_marshaller: _g_cclosure_marshal_VOID__ENUM_OBJECTv); |
193 | |
194 | source_quark = g_quark_from_static_string (string: "g-socket-listener-source" ); |
195 | } |
196 | |
197 | static void |
198 | g_socket_listener_init (GSocketListener *listener) |
199 | { |
200 | listener->priv = g_socket_listener_get_instance_private (self: listener); |
201 | listener->priv->sockets = |
202 | g_ptr_array_new_with_free_func (element_free_func: (GDestroyNotify) g_object_unref); |
203 | listener->priv->listen_backlog = 10; |
204 | } |
205 | |
206 | /** |
207 | * g_socket_listener_new: |
208 | * |
209 | * Creates a new #GSocketListener with no sockets to listen for. |
210 | * New listeners can be added with e.g. g_socket_listener_add_address() |
211 | * or g_socket_listener_add_inet_port(). |
212 | * |
213 | * Returns: a new #GSocketListener. |
214 | * |
215 | * Since: 2.22 |
216 | */ |
217 | GSocketListener * |
218 | g_socket_listener_new (void) |
219 | { |
220 | return g_object_new (G_TYPE_SOCKET_LISTENER, NULL); |
221 | } |
222 | |
223 | static gboolean |
224 | check_listener (GSocketListener *listener, |
225 | GError **error) |
226 | { |
227 | if (listener->priv->closed) |
228 | { |
229 | g_set_error_literal (err: error, G_IO_ERROR, code: G_IO_ERROR_CLOSED, |
230 | _("Listener is already closed" )); |
231 | return FALSE; |
232 | } |
233 | |
234 | return TRUE; |
235 | } |
236 | |
237 | /** |
238 | * g_socket_listener_add_socket: |
239 | * @listener: a #GSocketListener |
240 | * @socket: a listening #GSocket |
241 | * @source_object: (nullable): Optional #GObject identifying this source |
242 | * @error: #GError for error reporting, or %NULL to ignore. |
243 | * |
244 | * Adds @socket to the set of sockets that we try to accept |
245 | * new clients from. The socket must be bound to a local |
246 | * address and listened to. |
247 | * |
248 | * @source_object will be passed out in the various calls |
249 | * to accept to identify this particular source, which is |
250 | * useful if you're listening on multiple addresses and do |
251 | * different things depending on what address is connected to. |
252 | * |
253 | * The @socket will not be automatically closed when the @listener is finalized |
254 | * unless the listener held the final reference to the socket. Before GLib 2.42, |
255 | * the @socket was automatically closed on finalization of the @listener, even |
256 | * if references to it were held elsewhere. |
257 | * |
258 | * Returns: %TRUE on success, %FALSE on error. |
259 | * |
260 | * Since: 2.22 |
261 | */ |
262 | gboolean |
263 | g_socket_listener_add_socket (GSocketListener *listener, |
264 | GSocket *socket, |
265 | GObject *source_object, |
266 | GError **error) |
267 | { |
268 | if (!check_listener (listener, error)) |
269 | return FALSE; |
270 | |
271 | /* TODO: Check that socket it is bound & not closed? */ |
272 | |
273 | if (g_socket_is_closed (socket)) |
274 | { |
275 | g_set_error_literal (err: error, G_IO_ERROR, code: G_IO_ERROR_FAILED, |
276 | _("Added socket is closed" )); |
277 | return FALSE; |
278 | } |
279 | |
280 | g_object_ref (socket); |
281 | g_ptr_array_add (array: listener->priv->sockets, data: socket); |
282 | |
283 | if (source_object) |
284 | g_object_set_qdata_full (G_OBJECT (socket), quark: source_quark, |
285 | g_object_ref (source_object), destroy: g_object_unref); |
286 | |
287 | |
288 | if (G_SOCKET_LISTENER_GET_CLASS (listener)->changed) |
289 | G_SOCKET_LISTENER_GET_CLASS (listener)->changed (listener); |
290 | |
291 | return TRUE; |
292 | } |
293 | |
294 | /** |
295 | * g_socket_listener_add_address: |
296 | * @listener: a #GSocketListener |
297 | * @address: a #GSocketAddress |
298 | * @type: a #GSocketType |
299 | * @protocol: a #GSocketProtocol |
300 | * @source_object: (nullable): Optional #GObject identifying this source |
301 | * @effective_address: (out) (optional): location to store the address that was bound to, or %NULL. |
302 | * @error: #GError for error reporting, or %NULL to ignore. |
303 | * |
304 | * Creates a socket of type @type and protocol @protocol, binds |
305 | * it to @address and adds it to the set of sockets we're accepting |
306 | * sockets from. |
307 | * |
308 | * Note that adding an IPv6 address, depending on the platform, |
309 | * may or may not result in a listener that also accepts IPv4 |
310 | * connections. For more deterministic behavior, see |
311 | * g_socket_listener_add_inet_port(). |
312 | * |
313 | * @source_object will be passed out in the various calls |
314 | * to accept to identify this particular source, which is |
315 | * useful if you're listening on multiple addresses and do |
316 | * different things depending on what address is connected to. |
317 | * |
318 | * If successful and @effective_address is non-%NULL then it will |
319 | * be set to the address that the binding actually occurred at. This |
320 | * is helpful for determining the port number that was used for when |
321 | * requesting a binding to port 0 (ie: "any port"). This address, if |
322 | * requested, belongs to the caller and must be freed. |
323 | * |
324 | * Call g_socket_listener_close() to stop listening on @address; this will not |
325 | * be done automatically when you drop your final reference to @listener, as |
326 | * references may be held internally. |
327 | * |
328 | * Returns: %TRUE on success, %FALSE on error. |
329 | * |
330 | * Since: 2.22 |
331 | */ |
332 | gboolean |
333 | g_socket_listener_add_address (GSocketListener *listener, |
334 | GSocketAddress *address, |
335 | GSocketType type, |
336 | GSocketProtocol protocol, |
337 | GObject *source_object, |
338 | GSocketAddress **effective_address, |
339 | GError **error) |
340 | { |
341 | GSocketAddress *local_address; |
342 | GSocketFamily family; |
343 | GSocket *socket; |
344 | |
345 | if (!check_listener (listener, error)) |
346 | return FALSE; |
347 | |
348 | family = g_socket_address_get_family (address); |
349 | socket = g_socket_new (family, type, protocol, error); |
350 | if (socket == NULL) |
351 | return FALSE; |
352 | |
353 | g_socket_set_listen_backlog (socket, backlog: listener->priv->listen_backlog); |
354 | |
355 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
356 | G_SOCKET_LISTENER_BINDING, socket); |
357 | |
358 | if (!g_socket_bind (socket, address, TRUE, error)) |
359 | { |
360 | g_object_unref (object: socket); |
361 | return FALSE; |
362 | } |
363 | |
364 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
365 | G_SOCKET_LISTENER_BOUND, socket); |
366 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
367 | G_SOCKET_LISTENER_LISTENING, socket); |
368 | |
369 | if (!g_socket_listen (socket, error)) |
370 | { |
371 | g_object_unref (object: socket); |
372 | return FALSE; |
373 | } |
374 | |
375 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
376 | G_SOCKET_LISTENER_LISTENED, socket); |
377 | |
378 | local_address = NULL; |
379 | if (effective_address) |
380 | { |
381 | local_address = g_socket_get_local_address (socket, error); |
382 | if (local_address == NULL) |
383 | { |
384 | g_object_unref (object: socket); |
385 | return FALSE; |
386 | } |
387 | } |
388 | |
389 | if (!g_socket_listener_add_socket (listener, socket, |
390 | source_object, |
391 | error)) |
392 | { |
393 | if (local_address) |
394 | g_object_unref (object: local_address); |
395 | g_object_unref (object: socket); |
396 | return FALSE; |
397 | } |
398 | |
399 | if (effective_address) |
400 | *effective_address = local_address; |
401 | |
402 | g_object_unref (object: socket); /* add_socket refs this */ |
403 | |
404 | return TRUE; |
405 | } |
406 | |
407 | /** |
408 | * g_socket_listener_add_inet_port: |
409 | * @listener: a #GSocketListener |
410 | * @port: an IP port number (non-zero) |
411 | * @source_object: (nullable): Optional #GObject identifying this source |
412 | * @error: #GError for error reporting, or %NULL to ignore. |
413 | * |
414 | * Helper function for g_socket_listener_add_address() that |
415 | * creates a TCP/IP socket listening on IPv4 and IPv6 (if |
416 | * supported) on the specified port on all interfaces. |
417 | * |
418 | * @source_object will be passed out in the various calls |
419 | * to accept to identify this particular source, which is |
420 | * useful if you're listening on multiple addresses and do |
421 | * different things depending on what address is connected to. |
422 | * |
423 | * Call g_socket_listener_close() to stop listening on @port; this will not |
424 | * be done automatically when you drop your final reference to @listener, as |
425 | * references may be held internally. |
426 | * |
427 | * Returns: %TRUE on success, %FALSE on error. |
428 | * |
429 | * Since: 2.22 |
430 | */ |
431 | gboolean |
432 | g_socket_listener_add_inet_port (GSocketListener *listener, |
433 | guint16 port, |
434 | GObject *source_object, |
435 | GError **error) |
436 | { |
437 | gboolean need_ipv4_socket = TRUE; |
438 | GSocket *socket4 = NULL; |
439 | GSocket *socket6; |
440 | |
441 | g_return_val_if_fail (listener != NULL, FALSE); |
442 | g_return_val_if_fail (port != 0, FALSE); |
443 | |
444 | if (!check_listener (listener, error)) |
445 | return FALSE; |
446 | |
447 | /* first try to create an IPv6 socket */ |
448 | socket6 = g_socket_new (family: G_SOCKET_FAMILY_IPV6, |
449 | type: G_SOCKET_TYPE_STREAM, |
450 | protocol: G_SOCKET_PROTOCOL_DEFAULT, |
451 | NULL); |
452 | |
453 | if (socket6 != NULL) |
454 | /* IPv6 is supported on this platform, so if we fail now it is |
455 | * a result of being unable to bind to our port. Don't fail |
456 | * silently as a result of this! |
457 | */ |
458 | { |
459 | GInetAddress *inet_address; |
460 | GSocketAddress *address; |
461 | |
462 | inet_address = g_inet_address_new_any (family: G_SOCKET_FAMILY_IPV6); |
463 | address = g_inet_socket_address_new (address: inet_address, port); |
464 | g_object_unref (object: inet_address); |
465 | |
466 | g_socket_set_listen_backlog (socket: socket6, backlog: listener->priv->listen_backlog); |
467 | |
468 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
469 | G_SOCKET_LISTENER_BINDING, socket6); |
470 | |
471 | if (!g_socket_bind (socket: socket6, address, TRUE, error)) |
472 | { |
473 | g_object_unref (object: address); |
474 | g_object_unref (object: socket6); |
475 | return FALSE; |
476 | } |
477 | |
478 | g_object_unref (object: address); |
479 | |
480 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
481 | G_SOCKET_LISTENER_BOUND, socket6); |
482 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
483 | G_SOCKET_LISTENER_LISTENING, socket6); |
484 | |
485 | if (!g_socket_listen (socket: socket6, error)) |
486 | { |
487 | g_object_unref (object: socket6); |
488 | return FALSE; |
489 | } |
490 | |
491 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
492 | G_SOCKET_LISTENER_LISTENED, socket6); |
493 | |
494 | if (source_object) |
495 | g_object_set_qdata_full (G_OBJECT (socket6), quark: source_quark, |
496 | g_object_ref (source_object), |
497 | destroy: g_object_unref); |
498 | |
499 | /* If this socket already speaks IPv4 then we are done. */ |
500 | if (g_socket_speaks_ipv4 (socket: socket6)) |
501 | need_ipv4_socket = FALSE; |
502 | } |
503 | |
504 | if (need_ipv4_socket) |
505 | /* We are here for exactly one of the following reasons: |
506 | * |
507 | * - our platform doesn't support IPv6 |
508 | * - we successfully created an IPv6 socket but it's V6ONLY |
509 | * |
510 | * In either case, we need to go ahead and create an IPv4 socket |
511 | * and fail the call if we can't bind to it. |
512 | */ |
513 | { |
514 | socket4 = g_socket_new (family: G_SOCKET_FAMILY_IPV4, |
515 | type: G_SOCKET_TYPE_STREAM, |
516 | protocol: G_SOCKET_PROTOCOL_DEFAULT, |
517 | error); |
518 | |
519 | if (socket4 != NULL) |
520 | /* IPv4 is supported on this platform, so if we fail now it is |
521 | * a result of being unable to bind to our port. Don't fail |
522 | * silently as a result of this! |
523 | */ |
524 | { |
525 | GInetAddress *inet_address; |
526 | GSocketAddress *address; |
527 | |
528 | inet_address = g_inet_address_new_any (family: G_SOCKET_FAMILY_IPV4); |
529 | address = g_inet_socket_address_new (address: inet_address, port); |
530 | g_object_unref (object: inet_address); |
531 | |
532 | g_socket_set_listen_backlog (socket: socket4, |
533 | backlog: listener->priv->listen_backlog); |
534 | |
535 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
536 | G_SOCKET_LISTENER_BINDING, socket4); |
537 | |
538 | if (!g_socket_bind (socket: socket4, address, TRUE, error)) |
539 | { |
540 | g_object_unref (object: address); |
541 | g_object_unref (object: socket4); |
542 | if (socket6 != NULL) |
543 | g_object_unref (object: socket6); |
544 | |
545 | return FALSE; |
546 | } |
547 | |
548 | g_object_unref (object: address); |
549 | |
550 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
551 | G_SOCKET_LISTENER_BOUND, socket4); |
552 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
553 | G_SOCKET_LISTENER_LISTENING, socket4); |
554 | |
555 | if (!g_socket_listen (socket: socket4, error)) |
556 | { |
557 | g_object_unref (object: socket4); |
558 | if (socket6 != NULL) |
559 | g_object_unref (object: socket6); |
560 | |
561 | return FALSE; |
562 | } |
563 | |
564 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
565 | G_SOCKET_LISTENER_LISTENED, socket4); |
566 | |
567 | if (source_object) |
568 | g_object_set_qdata_full (G_OBJECT (socket4), quark: source_quark, |
569 | g_object_ref (source_object), |
570 | destroy: g_object_unref); |
571 | } |
572 | else |
573 | /* Ok. So IPv4 is not supported on this platform. If we |
574 | * succeeded at creating an IPv6 socket then that's OK, but |
575 | * otherwise we need to tell the user we failed. |
576 | */ |
577 | { |
578 | if (socket6 != NULL) |
579 | g_clear_error (err: error); |
580 | else |
581 | return FALSE; |
582 | } |
583 | } |
584 | |
585 | g_assert (socket6 != NULL || socket4 != NULL); |
586 | |
587 | if (socket6 != NULL) |
588 | g_ptr_array_add (array: listener->priv->sockets, data: socket6); |
589 | |
590 | if (socket4 != NULL) |
591 | g_ptr_array_add (array: listener->priv->sockets, data: socket4); |
592 | |
593 | if (G_SOCKET_LISTENER_GET_CLASS (listener)->changed) |
594 | G_SOCKET_LISTENER_GET_CLASS (listener)->changed (listener); |
595 | |
596 | return TRUE; |
597 | } |
598 | |
599 | static GList * |
600 | add_sources (GSocketListener *listener, |
601 | GSocketSourceFunc callback, |
602 | gpointer callback_data, |
603 | GCancellable *cancellable, |
604 | GMainContext *context) |
605 | { |
606 | GSocket *socket; |
607 | GSource *source; |
608 | GList *sources; |
609 | guint i; |
610 | |
611 | sources = NULL; |
612 | for (i = 0; i < listener->priv->sockets->len; i++) |
613 | { |
614 | socket = listener->priv->sockets->pdata[i]; |
615 | |
616 | source = g_socket_create_source (socket, condition: G_IO_IN, cancellable); |
617 | g_source_set_callback (source, |
618 | func: (GSourceFunc) callback, |
619 | data: callback_data, NULL); |
620 | g_source_attach (source, context); |
621 | |
622 | sources = g_list_prepend (list: sources, data: source); |
623 | } |
624 | |
625 | return sources; |
626 | } |
627 | |
628 | static void |
629 | free_sources (GList *sources) |
630 | { |
631 | GSource *source; |
632 | while (sources != NULL) |
633 | { |
634 | source = sources->data; |
635 | sources = g_list_delete_link (list: sources, link_: sources); |
636 | g_source_destroy (source); |
637 | g_source_unref (source); |
638 | } |
639 | } |
640 | |
641 | struct AcceptData { |
642 | GMainLoop *loop; |
643 | GSocket *socket; |
644 | }; |
645 | |
646 | static gboolean |
647 | accept_callback (GSocket *socket, |
648 | GIOCondition condition, |
649 | gpointer user_data) |
650 | { |
651 | struct AcceptData *data = user_data; |
652 | |
653 | data->socket = socket; |
654 | g_main_loop_quit (loop: data->loop); |
655 | |
656 | return TRUE; |
657 | } |
658 | |
659 | /** |
660 | * g_socket_listener_accept_socket: |
661 | * @listener: a #GSocketListener |
662 | * @source_object: (out) (transfer none) (optional) (nullable): location where #GObject pointer will be stored, or %NULL. |
663 | * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore. |
664 | * @error: #GError for error reporting, or %NULL to ignore. |
665 | * |
666 | * Blocks waiting for a client to connect to any of the sockets added |
667 | * to the listener. Returns the #GSocket that was accepted. |
668 | * |
669 | * If you want to accept the high-level #GSocketConnection, not a #GSocket, |
670 | * which is often the case, then you should use g_socket_listener_accept() |
671 | * instead. |
672 | * |
673 | * If @source_object is not %NULL it will be filled out with the source |
674 | * object specified when the corresponding socket or address was added |
675 | * to the listener. |
676 | * |
677 | * If @cancellable is not %NULL, then the operation can be cancelled by |
678 | * triggering the cancellable object from another thread. If the operation |
679 | * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. |
680 | * |
681 | * Returns: (transfer full): a #GSocket on success, %NULL on error. |
682 | * |
683 | * Since: 2.22 |
684 | */ |
685 | GSocket * |
686 | g_socket_listener_accept_socket (GSocketListener *listener, |
687 | GObject **source_object, |
688 | GCancellable *cancellable, |
689 | GError **error) |
690 | { |
691 | GSocket *accept_socket, *socket; |
692 | |
693 | g_return_val_if_fail (G_IS_SOCKET_LISTENER (listener), NULL); |
694 | |
695 | if (!check_listener (listener, error)) |
696 | return NULL; |
697 | |
698 | if (listener->priv->sockets->len == 1) |
699 | { |
700 | accept_socket = listener->priv->sockets->pdata[0]; |
701 | if (!g_socket_condition_wait (socket: accept_socket, condition: G_IO_IN, |
702 | cancellable, error)) |
703 | return NULL; |
704 | } |
705 | else |
706 | { |
707 | GList *sources; |
708 | struct AcceptData data; |
709 | GMainLoop *loop; |
710 | |
711 | if (listener->priv->main_context == NULL) |
712 | listener->priv->main_context = g_main_context_new (); |
713 | |
714 | loop = g_main_loop_new (context: listener->priv->main_context, FALSE); |
715 | data.loop = loop; |
716 | sources = add_sources (listener, |
717 | callback: accept_callback, |
718 | callback_data: &data, |
719 | cancellable, |
720 | context: listener->priv->main_context); |
721 | g_main_loop_run (loop); |
722 | accept_socket = data.socket; |
723 | free_sources (sources); |
724 | g_main_loop_unref (loop); |
725 | } |
726 | |
727 | if (!(socket = g_socket_accept (socket: accept_socket, cancellable, error))) |
728 | return NULL; |
729 | |
730 | if (source_object) |
731 | *source_object = g_object_get_qdata (G_OBJECT (accept_socket), quark: source_quark); |
732 | |
733 | return socket; |
734 | } |
735 | |
736 | /** |
737 | * g_socket_listener_accept: |
738 | * @listener: a #GSocketListener |
739 | * @source_object: (out) (transfer none) (optional) (nullable): location where #GObject pointer will be stored, or %NULL |
740 | * @cancellable: (nullable): optional #GCancellable object, %NULL to ignore. |
741 | * @error: #GError for error reporting, or %NULL to ignore. |
742 | * |
743 | * Blocks waiting for a client to connect to any of the sockets added |
744 | * to the listener. Returns a #GSocketConnection for the socket that was |
745 | * accepted. |
746 | * |
747 | * If @source_object is not %NULL it will be filled out with the source |
748 | * object specified when the corresponding socket or address was added |
749 | * to the listener. |
750 | * |
751 | * If @cancellable is not %NULL, then the operation can be cancelled by |
752 | * triggering the cancellable object from another thread. If the operation |
753 | * was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. |
754 | * |
755 | * Returns: (transfer full): a #GSocketConnection on success, %NULL on error. |
756 | * |
757 | * Since: 2.22 |
758 | */ |
759 | GSocketConnection * |
760 | g_socket_listener_accept (GSocketListener *listener, |
761 | GObject **source_object, |
762 | GCancellable *cancellable, |
763 | GError **error) |
764 | { |
765 | GSocketConnection *connection; |
766 | GSocket *socket; |
767 | |
768 | socket = g_socket_listener_accept_socket (listener, |
769 | source_object, |
770 | cancellable, |
771 | error); |
772 | if (socket == NULL) |
773 | return NULL; |
774 | |
775 | connection = g_socket_connection_factory_create_connection (socket); |
776 | g_object_unref (object: socket); |
777 | |
778 | return connection; |
779 | } |
780 | |
781 | typedef struct |
782 | { |
783 | GList *sources; /* (element-type GSource) */ |
784 | gboolean returned_yet; |
785 | } AcceptSocketAsyncData; |
786 | |
787 | static void |
788 | accept_socket_async_data_free (AcceptSocketAsyncData *data) |
789 | { |
790 | free_sources (sources: data->sources); |
791 | g_free (mem: data); |
792 | } |
793 | |
794 | static gboolean |
795 | accept_ready (GSocket *accept_socket, |
796 | GIOCondition condition, |
797 | gpointer user_data) |
798 | { |
799 | GTask *task = user_data; |
800 | GError *error = NULL; |
801 | GSocket *socket; |
802 | GObject *source_object; |
803 | AcceptSocketAsyncData *data = g_task_get_task_data (task); |
804 | |
805 | /* Don’t call g_task_return_*() multiple times if we have multiple incoming |
806 | * connections in the same #GMainContext iteration. */ |
807 | if (data->returned_yet) |
808 | return G_SOURCE_REMOVE; |
809 | |
810 | socket = g_socket_accept (socket: accept_socket, cancellable: g_task_get_cancellable (task), error: &error); |
811 | if (socket) |
812 | { |
813 | source_object = g_object_get_qdata (G_OBJECT (accept_socket), quark: source_quark); |
814 | if (source_object) |
815 | g_object_set_qdata_full (G_OBJECT (task), |
816 | quark: source_quark, |
817 | g_object_ref (source_object), destroy: g_object_unref); |
818 | g_task_return_pointer (task, result: socket, result_destroy: g_object_unref); |
819 | } |
820 | else |
821 | { |
822 | g_task_return_error (task, error); |
823 | } |
824 | |
825 | data->returned_yet = TRUE; |
826 | g_object_unref (object: task); |
827 | |
828 | return G_SOURCE_REMOVE; |
829 | } |
830 | |
831 | /** |
832 | * g_socket_listener_accept_socket_async: |
833 | * @listener: a #GSocketListener |
834 | * @cancellable: (nullable): a #GCancellable, or %NULL |
835 | * @callback: (scope async): a #GAsyncReadyCallback |
836 | * @user_data: (closure): user data for the callback |
837 | * |
838 | * This is the asynchronous version of g_socket_listener_accept_socket(). |
839 | * |
840 | * When the operation is finished @callback will be |
841 | * called. You can then call g_socket_listener_accept_socket_finish() |
842 | * to get the result of the operation. |
843 | * |
844 | * Since: 2.22 |
845 | */ |
846 | void |
847 | g_socket_listener_accept_socket_async (GSocketListener *listener, |
848 | GCancellable *cancellable, |
849 | GAsyncReadyCallback callback, |
850 | gpointer user_data) |
851 | { |
852 | GTask *task; |
853 | GError *error = NULL; |
854 | AcceptSocketAsyncData *data = NULL; |
855 | |
856 | task = g_task_new (source_object: listener, cancellable, callback, callback_data: user_data); |
857 | g_task_set_source_tag (task, g_socket_listener_accept_socket_async); |
858 | |
859 | if (!check_listener (listener, error: &error)) |
860 | { |
861 | g_task_return_error (task, error); |
862 | g_object_unref (object: task); |
863 | return; |
864 | } |
865 | |
866 | data = g_new0 (AcceptSocketAsyncData, 1); |
867 | data->returned_yet = FALSE; |
868 | data->sources = add_sources (listener, |
869 | callback: accept_ready, |
870 | callback_data: task, |
871 | cancellable, |
872 | context: g_main_context_get_thread_default ()); |
873 | g_task_set_task_data (task, g_steal_pointer (&data), |
874 | task_data_destroy: (GDestroyNotify) accept_socket_async_data_free); |
875 | } |
876 | |
877 | /** |
878 | * g_socket_listener_accept_socket_finish: |
879 | * @listener: a #GSocketListener |
880 | * @result: a #GAsyncResult. |
881 | * @source_object: (out) (transfer none) (optional) (nullable): Optional #GObject identifying this source |
882 | * @error: a #GError location to store the error occurring, or %NULL to |
883 | * ignore. |
884 | * |
885 | * Finishes an async accept operation. See g_socket_listener_accept_socket_async() |
886 | * |
887 | * Returns: (transfer full): a #GSocket on success, %NULL on error. |
888 | * |
889 | * Since: 2.22 |
890 | */ |
891 | GSocket * |
892 | g_socket_listener_accept_socket_finish (GSocketListener *listener, |
893 | GAsyncResult *result, |
894 | GObject **source_object, |
895 | GError **error) |
896 | { |
897 | g_return_val_if_fail (G_IS_SOCKET_LISTENER (listener), NULL); |
898 | g_return_val_if_fail (g_task_is_valid (result, listener), NULL); |
899 | |
900 | if (source_object) |
901 | *source_object = g_object_get_qdata (G_OBJECT (result), quark: source_quark); |
902 | |
903 | return g_task_propagate_pointer (G_TASK (result), error); |
904 | } |
905 | |
906 | /** |
907 | * g_socket_listener_accept_async: |
908 | * @listener: a #GSocketListener |
909 | * @cancellable: (nullable): a #GCancellable, or %NULL |
910 | * @callback: (scope async): a #GAsyncReadyCallback |
911 | * @user_data: (closure): user data for the callback |
912 | * |
913 | * This is the asynchronous version of g_socket_listener_accept(). |
914 | * |
915 | * When the operation is finished @callback will be |
916 | * called. You can then call g_socket_listener_accept_socket() |
917 | * to get the result of the operation. |
918 | * |
919 | * Since: 2.22 |
920 | */ |
921 | void |
922 | g_socket_listener_accept_async (GSocketListener *listener, |
923 | GCancellable *cancellable, |
924 | GAsyncReadyCallback callback, |
925 | gpointer user_data) |
926 | { |
927 | g_socket_listener_accept_socket_async (listener, |
928 | cancellable, |
929 | callback, |
930 | user_data); |
931 | } |
932 | |
933 | /** |
934 | * g_socket_listener_accept_finish: |
935 | * @listener: a #GSocketListener |
936 | * @result: a #GAsyncResult. |
937 | * @source_object: (out) (transfer none) (optional) (nullable): Optional #GObject identifying this source |
938 | * @error: a #GError location to store the error occurring, or %NULL to |
939 | * ignore. |
940 | * |
941 | * Finishes an async accept operation. See g_socket_listener_accept_async() |
942 | * |
943 | * Returns: (transfer full): a #GSocketConnection on success, %NULL on error. |
944 | * |
945 | * Since: 2.22 |
946 | */ |
947 | GSocketConnection * |
948 | g_socket_listener_accept_finish (GSocketListener *listener, |
949 | GAsyncResult *result, |
950 | GObject **source_object, |
951 | GError **error) |
952 | { |
953 | GSocket *socket; |
954 | GSocketConnection *connection; |
955 | |
956 | socket = g_socket_listener_accept_socket_finish (listener, |
957 | result, |
958 | source_object, |
959 | error); |
960 | if (socket == NULL) |
961 | return NULL; |
962 | |
963 | connection = g_socket_connection_factory_create_connection (socket); |
964 | g_object_unref (object: socket); |
965 | return connection; |
966 | } |
967 | |
968 | /** |
969 | * g_socket_listener_set_backlog: |
970 | * @listener: a #GSocketListener |
971 | * @listen_backlog: an integer |
972 | * |
973 | * Sets the listen backlog on the sockets in the listener. This must be called |
974 | * before adding any sockets, addresses or ports to the #GSocketListener (for |
975 | * example, by calling g_socket_listener_add_inet_port()) to be effective. |
976 | * |
977 | * See g_socket_set_listen_backlog() for details |
978 | * |
979 | * Since: 2.22 |
980 | */ |
981 | void |
982 | g_socket_listener_set_backlog (GSocketListener *listener, |
983 | int listen_backlog) |
984 | { |
985 | GSocket *socket; |
986 | guint i; |
987 | |
988 | if (listener->priv->closed) |
989 | return; |
990 | |
991 | listener->priv->listen_backlog = listen_backlog; |
992 | |
993 | for (i = 0; i < listener->priv->sockets->len; i++) |
994 | { |
995 | socket = listener->priv->sockets->pdata[i]; |
996 | g_socket_set_listen_backlog (socket, backlog: listen_backlog); |
997 | } |
998 | } |
999 | |
1000 | /** |
1001 | * g_socket_listener_close: |
1002 | * @listener: a #GSocketListener |
1003 | * |
1004 | * Closes all the sockets in the listener. |
1005 | * |
1006 | * Since: 2.22 |
1007 | */ |
1008 | void |
1009 | g_socket_listener_close (GSocketListener *listener) |
1010 | { |
1011 | GSocket *socket; |
1012 | guint i; |
1013 | |
1014 | g_return_if_fail (G_IS_SOCKET_LISTENER (listener)); |
1015 | |
1016 | if (listener->priv->closed) |
1017 | return; |
1018 | |
1019 | for (i = 0; i < listener->priv->sockets->len; i++) |
1020 | { |
1021 | socket = listener->priv->sockets->pdata[i]; |
1022 | g_socket_close (socket, NULL); |
1023 | } |
1024 | listener->priv->closed = TRUE; |
1025 | } |
1026 | |
1027 | /** |
1028 | * g_socket_listener_add_any_inet_port: |
1029 | * @listener: a #GSocketListener |
1030 | * @source_object: (nullable): Optional #GObject identifying this source |
1031 | * @error: a #GError location to store the error occurring, or %NULL to |
1032 | * ignore. |
1033 | * |
1034 | * Listens for TCP connections on any available port number for both |
1035 | * IPv6 and IPv4 (if each is available). |
1036 | * |
1037 | * This is useful if you need to have a socket for incoming connections |
1038 | * but don't care about the specific port number. |
1039 | * |
1040 | * @source_object will be passed out in the various calls |
1041 | * to accept to identify this particular source, which is |
1042 | * useful if you're listening on multiple addresses and do |
1043 | * different things depending on what address is connected to. |
1044 | * |
1045 | * Returns: the port number, or 0 in case of failure. |
1046 | * |
1047 | * Since: 2.24 |
1048 | **/ |
1049 | guint16 |
1050 | g_socket_listener_add_any_inet_port (GSocketListener *listener, |
1051 | GObject *source_object, |
1052 | GError **error) |
1053 | { |
1054 | GSList *sockets_to_close = NULL; |
1055 | guint16 candidate_port = 0; |
1056 | GSocket *socket6 = NULL; |
1057 | GSocket *socket4 = NULL; |
1058 | gint attempts = 37; |
1059 | |
1060 | /* |
1061 | * multi-step process: |
1062 | * - first, create an IPv6 socket. |
1063 | * - if that fails, create an IPv4 socket and bind it to port 0 and |
1064 | * that's it. no retries if that fails (why would it?). |
1065 | * - if our IPv6 socket also speaks IPv4 then we are done. |
1066 | * - if not, then we need to create a IPv4 socket with the same port |
1067 | * number. this might fail, of course. so we try this a bunch of |
1068 | * times -- leaving the old IPv6 sockets open so that we get a |
1069 | * different port number to try each time. |
1070 | * - if all that fails then just give up. |
1071 | */ |
1072 | |
1073 | while (attempts--) |
1074 | { |
1075 | GInetAddress *inet_address; |
1076 | GSocketAddress *address; |
1077 | gboolean result; |
1078 | |
1079 | g_assert (socket6 == NULL); |
1080 | socket6 = g_socket_new (family: G_SOCKET_FAMILY_IPV6, |
1081 | type: G_SOCKET_TYPE_STREAM, |
1082 | protocol: G_SOCKET_PROTOCOL_DEFAULT, |
1083 | NULL); |
1084 | |
1085 | if (socket6 != NULL) |
1086 | { |
1087 | inet_address = g_inet_address_new_any (family: G_SOCKET_FAMILY_IPV6); |
1088 | address = g_inet_socket_address_new (address: inet_address, port: 0); |
1089 | g_object_unref (object: inet_address); |
1090 | |
1091 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1092 | G_SOCKET_LISTENER_BINDING, socket6); |
1093 | |
1094 | result = g_socket_bind (socket: socket6, address, TRUE, error); |
1095 | g_object_unref (object: address); |
1096 | |
1097 | if (!result || |
1098 | !(address = g_socket_get_local_address (socket: socket6, error))) |
1099 | { |
1100 | g_object_unref (object: socket6); |
1101 | socket6 = NULL; |
1102 | break; |
1103 | } |
1104 | |
1105 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1106 | G_SOCKET_LISTENER_BOUND, socket6); |
1107 | |
1108 | g_assert (G_IS_INET_SOCKET_ADDRESS (address)); |
1109 | candidate_port = |
1110 | g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (address)); |
1111 | g_assert (candidate_port != 0); |
1112 | g_object_unref (object: address); |
1113 | |
1114 | if (g_socket_speaks_ipv4 (socket: socket6)) |
1115 | break; |
1116 | } |
1117 | |
1118 | g_assert (socket4 == NULL); |
1119 | socket4 = g_socket_new (family: G_SOCKET_FAMILY_IPV4, |
1120 | type: G_SOCKET_TYPE_STREAM, |
1121 | protocol: G_SOCKET_PROTOCOL_DEFAULT, |
1122 | error: socket6 ? NULL : error); |
1123 | |
1124 | if (socket4 == NULL) |
1125 | /* IPv4 not supported. |
1126 | * if IPv6 is supported then candidate_port will be non-zero |
1127 | * (and the error parameter above will have been NULL) |
1128 | * if IPv6 is unsupported then candidate_port will be zero |
1129 | * (and error will have been set by the above call) |
1130 | */ |
1131 | break; |
1132 | |
1133 | inet_address = g_inet_address_new_any (family: G_SOCKET_FAMILY_IPV4); |
1134 | address = g_inet_socket_address_new (address: inet_address, port: candidate_port); |
1135 | g_object_unref (object: inet_address); |
1136 | |
1137 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1138 | G_SOCKET_LISTENER_BINDING, socket4); |
1139 | |
1140 | /* a note on the 'error' clause below: |
1141 | * |
1142 | * if candidate_port is 0 then we report the error right away |
1143 | * since it is strange that this binding would fail at all. |
1144 | * otherwise, we ignore the error message (ie: NULL). |
1145 | * |
1146 | * the exception to this rule is the last time through the loop |
1147 | * (ie: attempts == 0) in which case we want to set the error |
1148 | * because failure here means that the entire call will fail and |
1149 | * we need something to show to the user. |
1150 | * |
1151 | * an english summary of the situation: "if we gave a candidate |
1152 | * port number AND we have more attempts to try, then ignore the |
1153 | * error for now". |
1154 | */ |
1155 | result = g_socket_bind (socket: socket4, address, TRUE, |
1156 | error: (candidate_port && attempts) ? NULL : error); |
1157 | g_object_unref (object: address); |
1158 | |
1159 | if (candidate_port) |
1160 | { |
1161 | g_assert (socket6 != NULL); |
1162 | |
1163 | if (result) |
1164 | /* got our candidate port successfully */ |
1165 | { |
1166 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1167 | G_SOCKET_LISTENER_BOUND, socket4); |
1168 | break; |
1169 | } |
1170 | else |
1171 | /* we failed to bind to the specified port. try again. */ |
1172 | { |
1173 | g_object_unref (object: socket4); |
1174 | socket4 = NULL; |
1175 | |
1176 | /* keep this open so we get a different port number */ |
1177 | sockets_to_close = g_slist_prepend (list: sockets_to_close, |
1178 | data: socket6); |
1179 | candidate_port = 0; |
1180 | socket6 = NULL; |
1181 | } |
1182 | } |
1183 | else |
1184 | /* we didn't tell it a port. this means two things. |
1185 | * - if we failed, then something really bad happened. |
1186 | * - if we succeeded, then we need to find out the port number. |
1187 | */ |
1188 | { |
1189 | g_assert (socket6 == NULL); |
1190 | |
1191 | if (!result || |
1192 | !(address = g_socket_get_local_address (socket: socket4, error))) |
1193 | { |
1194 | g_object_unref (object: socket4); |
1195 | socket4 = NULL; |
1196 | break; |
1197 | } |
1198 | |
1199 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1200 | G_SOCKET_LISTENER_BOUND, socket4); |
1201 | |
1202 | g_assert (G_IS_INET_SOCKET_ADDRESS (address)); |
1203 | candidate_port = |
1204 | g_inet_socket_address_get_port (G_INET_SOCKET_ADDRESS (address)); |
1205 | g_assert (candidate_port != 0); |
1206 | g_object_unref (object: address); |
1207 | break; |
1208 | } |
1209 | } |
1210 | |
1211 | /* should only be non-zero if we have a socket */ |
1212 | g_assert ((candidate_port != 0) == (socket4 || socket6)); |
1213 | |
1214 | while (sockets_to_close) |
1215 | { |
1216 | g_object_unref (object: sockets_to_close->data); |
1217 | sockets_to_close = g_slist_delete_link (list: sockets_to_close, |
1218 | link_: sockets_to_close); |
1219 | } |
1220 | |
1221 | /* now we actually listen() the sockets and add them to the listener */ |
1222 | if (socket6 != NULL) |
1223 | { |
1224 | g_socket_set_listen_backlog (socket: socket6, backlog: listener->priv->listen_backlog); |
1225 | |
1226 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1227 | G_SOCKET_LISTENER_LISTENING, socket6); |
1228 | |
1229 | if (!g_socket_listen (socket: socket6, error)) |
1230 | { |
1231 | g_object_unref (object: socket6); |
1232 | if (socket4) |
1233 | g_object_unref (object: socket4); |
1234 | |
1235 | return 0; |
1236 | } |
1237 | |
1238 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1239 | G_SOCKET_LISTENER_LISTENED, socket6); |
1240 | |
1241 | if (source_object) |
1242 | g_object_set_qdata_full (G_OBJECT (socket6), quark: source_quark, |
1243 | g_object_ref (source_object), |
1244 | destroy: g_object_unref); |
1245 | |
1246 | g_ptr_array_add (array: listener->priv->sockets, data: socket6); |
1247 | } |
1248 | |
1249 | if (socket4 != NULL) |
1250 | { |
1251 | g_socket_set_listen_backlog (socket: socket4, backlog: listener->priv->listen_backlog); |
1252 | |
1253 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1254 | G_SOCKET_LISTENER_LISTENING, socket4); |
1255 | |
1256 | if (!g_socket_listen (socket: socket4, error)) |
1257 | { |
1258 | g_object_unref (object: socket4); |
1259 | if (socket6) |
1260 | g_object_unref (object: socket6); |
1261 | |
1262 | return 0; |
1263 | } |
1264 | |
1265 | g_signal_emit (instance: listener, signal_id: signals[EVENT], detail: 0, |
1266 | G_SOCKET_LISTENER_LISTENED, socket4); |
1267 | |
1268 | if (source_object) |
1269 | g_object_set_qdata_full (G_OBJECT (socket4), quark: source_quark, |
1270 | g_object_ref (source_object), |
1271 | destroy: g_object_unref); |
1272 | |
1273 | g_ptr_array_add (array: listener->priv->sockets, data: socket4); |
1274 | } |
1275 | |
1276 | if ((socket4 != NULL || socket6 != NULL) && |
1277 | G_SOCKET_LISTENER_GET_CLASS (listener)->changed) |
1278 | G_SOCKET_LISTENER_GET_CLASS (listener)->changed (listener); |
1279 | |
1280 | return candidate_port; |
1281 | } |
1282 | |