1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2008 Christian Kellner, Samuel Cormier-Iijima
4 * Copyright © 2009 Codethink Limited
5 * Copyright © 2009 Red Hat, Inc
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 of the License, or (at your option) any later version.
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.
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/>.
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>
31 #include "glib-unix.h"
42 # include <sys/ioctl.h>
45 #ifdef HAVE_SYS_FILIO_H
46 # include <sys/filio.h>
53 #include "gcancellable.h"
54 #include "gioenumtypes.h"
55 #include "ginetaddress.h"
56 #include "ginitable.h"
60 #include "gnetworkingprivate.h"
61 #include "gsocketaddress.h"
62 #include "gsocketcontrolmessage.h"
63 #include "gcredentials.h"
64 #include "gcredentialsprivate.h"
69 * @short_description: Low-level socket object
71 * @see_also: #GInitable, [<gnetworking.h>][gio-gnetworking.h]
73 * A #GSocket is a low-level networking primitive. It is a more or less
74 * direct mapping of the BSD socket API in a portable GObject based API.
75 * It supports both the UNIX socket implementations and winsock2 on Windows.
77 * #GSocket is the platform independent base upon which the higher level
78 * network primitives are based. Applications are not typically meant to
79 * use it directly, but rather through classes like #GSocketClient,
80 * #GSocketService and #GSocketConnection. However there may be cases where
81 * direct use of #GSocket is useful.
83 * #GSocket implements the #GInitable interface, so if it is manually constructed
84 * by e.g. g_object_new() you must call g_initable_init() and check the
85 * results before using the object. This is done automatically in
86 * g_socket_new() and g_socket_new_from_fd(), so these functions can return
89 * Sockets operate in two general modes, blocking or non-blocking. When
90 * in blocking mode all operations block until the requested operation
91 * is finished or there is an error. In non-blocking mode all calls that
92 * would block return immediately with a %G_IO_ERROR_WOULD_BLOCK error.
93 * To know when a call would successfully run you can call g_socket_condition_check(),
94 * or g_socket_condition_wait(). You can also use g_socket_create_source() and
95 * attach it to a #GMainContext to get callbacks when I/O is possible.
96 * Note that all sockets are always set to non blocking mode in the system, and
97 * blocking mode is emulated in GSocket.
99 * When working in non-blocking mode applications should always be able to
100 * handle getting a %G_IO_ERROR_WOULD_BLOCK error even when some other
101 * function said that I/O was possible. This can easily happen in case
102 * of a race condition in the application, but it can also happen for other
103 * reasons. For instance, on Windows a socket is always seen as writable
104 * until a write returns %G_IO_ERROR_WOULD_BLOCK.
106 * #GSockets can be either connection oriented or datagram based.
107 * For connection oriented types you must first establish a connection by
108 * either connecting to an address or accepting a connection from another
109 * address. For connectionless socket types the target/source address is
110 * specified or received in each I/O operation.
112 * All socket file descriptors are set to be close-on-exec.
114 * Note that creating a #GSocket causes the signal %SIGPIPE to be
115 * ignored for the remainder of the program. If you are writing a
116 * command-line utility that uses #GSocket, you may need to take into
117 * account the fact that your program will not automatically be killed
118 * if it tries to write to %stdout after it has been closed.
123 static void g_socket_initable_iface_init (GInitableIface *iface);
124 static gboolean g_socket_initable_init (GInitable *initable,
125 GCancellable *cancellable,
143 PROP_MULTICAST_LOOPBACK,
147 /* Size of the receiver cache for g_socket_receive_from() */
148 #define RECV_ADDR_CACHE_SIZE 8
150 struct _GSocketPrivate
152 GSocketFamily family;
154 GSocketProtocol protocol;
158 GError *construct_error;
159 GSocketAddress *remote_address;
167 guint connect_pending : 1;
173 GList *requested_conditions; /* list of requested GIOCondition * */
174 GMutex win32_source_lock;
178 GSocketAddress *addr;
179 struct sockaddr *native;
182 } recv_addr_cache[RECV_ADDR_CACHE_SIZE];
185 G_DEFINE_TYPE_WITH_CODE (GSocket, g_socket, G_TYPE_OBJECT,
186 G_ADD_PRIVATE (GSocket)
187 g_networking_init ();
188 G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
189 g_socket_initable_iface_init));
192 get_socket_errno (void)
197 return WSAGetLastError ();
202 socket_io_error_from_errno (int err)
205 return g_io_error_from_errno (err);
210 return G_IO_ERROR_ADDRESS_IN_USE;
212 return G_IO_ERROR_WOULD_BLOCK;
214 return G_IO_ERROR_PERMISSION_DENIED;
215 case WSA_INVALID_HANDLE:
216 case WSA_INVALID_PARAMETER:
219 return G_IO_ERROR_INVALID_ARGUMENT;
220 case WSAEPROTONOSUPPORT:
221 return G_IO_ERROR_NOT_SUPPORTED;
223 return G_IO_ERROR_CANCELLED;
224 case WSAESOCKTNOSUPPORT:
226 case WSAEPFNOSUPPORT:
227 case WSAEAFNOSUPPORT:
228 return G_IO_ERROR_NOT_SUPPORTED;
230 return G_IO_ERROR_FAILED;
236 socket_strerror (int err)
239 return g_strerror (err);
244 msg = g_win32_error_message (err);
246 msg_ret = g_intern_string (msg);
254 #define win32_unset_event_mask(_socket, _mask) _win32_unset_event_mask (_socket, _mask)
256 _win32_unset_event_mask (GSocket *socket, int mask)
258 socket->priv->current_events &= ~mask;
259 socket->priv->current_errors &= ~mask;
262 #define win32_unset_event_mask(_socket, _mask)
265 /* Windows has broken prototypes... */
267 #define getsockopt(sockfd, level, optname, optval, optlen) \
268 getsockopt (sockfd, level, optname, (gpointer) optval, (int*) optlen)
269 #define setsockopt(sockfd, level, optname, optval, optlen) \
270 setsockopt (sockfd, level, optname, (gpointer) optval, optlen)
271 #define getsockname(sockfd, addr, addrlen) \
272 getsockname (sockfd, addr, (int *)addrlen)
273 #define getpeername(sockfd, addr, addrlen) \
274 getpeername (sockfd, addr, (int *)addrlen)
275 #define recv(sockfd, buf, len, flags) \
276 recv (sockfd, (gpointer)buf, len, flags)
280 set_fd_nonblocking (int fd)
283 GError *error = NULL;
289 if (!g_unix_set_fd_nonblocking (fd, TRUE, &error))
291 g_warning ("Error setting socket nonblocking: %s", error->message);
292 g_clear_error (&error);
297 if (ioctlsocket (fd, FIONBIO, &arg) == SOCKET_ERROR)
299 int errsv = get_socket_errno ();
300 g_warning ("Error setting socket status flags: %s", socket_strerror (errsv));
306 check_socket (GSocket *socket,
309 if (!socket->priv->inited)
311 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
312 _("Invalid socket, not initialized"));
316 if (socket->priv->construct_error)
318 g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_INITIALIZED,
319 _("Invalid socket, initialization failed due to: %s"),
320 socket->priv->construct_error->message);
324 if (socket->priv->closed)
326 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CLOSED,
327 _("Socket is already closed"));
331 if (socket->priv->timed_out)
333 socket->priv->timed_out = FALSE;
334 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_TIMED_OUT,
335 _("Socket I/O timed out"));
343 g_socket_details_from_fd (GSocket *socket)
345 struct sockaddr_storage address;
351 fd = socket->priv->fd;
352 if (!g_socket_get_option (socket, SOL_SOCKET, SO_TYPE, &value, NULL))
354 errsv = get_socket_errno ();
366 /* programmer error */
367 g_error ("creating GSocket from fd %d: %s\n",
368 fd, socket_strerror (errsv));
379 socket->priv->type = G_SOCKET_TYPE_STREAM;
383 socket->priv->type = G_SOCKET_TYPE_DATAGRAM;
387 socket->priv->type = G_SOCKET_TYPE_SEQPACKET;
391 socket->priv->type = G_SOCKET_TYPE_INVALID;
395 addrlen = sizeof address;
396 if (getsockname (fd, (struct sockaddr *) &address, &addrlen) != 0)
398 errsv = get_socket_errno ();
404 g_assert (G_STRUCT_OFFSET (struct sockaddr, sa_family) +
405 sizeof address.ss_family <= addrlen);
406 family = address.ss_family;
410 /* On Solaris, this happens if the socket is not yet connected.
411 * But we can use SO_DOMAIN as a workaround there.
414 if (!g_socket_get_option (socket, SOL_SOCKET, SO_DOMAIN, &family, NULL))
416 errsv = get_socket_errno ();
420 /* This will translate to G_IO_ERROR_FAILED on either unix or windows */
428 case G_SOCKET_FAMILY_IPV4:
429 case G_SOCKET_FAMILY_IPV6:
430 socket->priv->family = address.ss_family;
431 switch (socket->priv->type)
433 case G_SOCKET_TYPE_STREAM:
434 socket->priv->protocol = G_SOCKET_PROTOCOL_TCP;
437 case G_SOCKET_TYPE_DATAGRAM:
438 socket->priv->protocol = G_SOCKET_PROTOCOL_UDP;
441 case G_SOCKET_TYPE_SEQPACKET:
442 socket->priv->protocol = G_SOCKET_PROTOCOL_SCTP;
450 case G_SOCKET_FAMILY_UNIX:
451 socket->priv->family = G_SOCKET_FAMILY_UNIX;
452 socket->priv->protocol = G_SOCKET_PROTOCOL_DEFAULT;
456 socket->priv->family = G_SOCKET_FAMILY_INVALID;
460 if (socket->priv->family != G_SOCKET_FAMILY_INVALID)
462 addrlen = sizeof address;
463 if (getpeername (fd, (struct sockaddr *) &address, &addrlen) >= 0)
464 socket->priv->connected = TRUE;
467 if (g_socket_get_option (socket, SOL_SOCKET, SO_KEEPALIVE, &value, NULL))
469 socket->priv->keepalive = !!value;
473 /* Can't read, maybe not supported, assume FALSE */
474 socket->priv->keepalive = FALSE;
480 g_set_error (&socket->priv->construct_error, G_IO_ERROR,
481 socket_io_error_from_errno (errsv),
482 _("creating GSocket from fd: %s"),
483 socket_strerror (errsv));
486 /* Wrapper around socket() that is shared with gnetworkmonitornetlink.c */
488 g_socket (gint domain,
496 fd = socket (domain, type | SOCK_CLOEXEC, protocol);
500 /* It's possible that libc has SOCK_CLOEXEC but the kernel does not */
501 if (fd < 0 && (errno == EINVAL || errno == EPROTOTYPE))
503 fd = socket (domain, type, protocol);
507 int errsv = get_socket_errno ();
509 g_set_error (error, G_IO_ERROR, socket_io_error_from_errno (errsv),
510 _("Unable to create socket: %s"), socket_strerror (errsv));
519 /* We always want to set close-on-exec to protect users. If you
520 need to so some weird inheritance to exec you can re-enable this
521 using lower level hacks with g_socket_get_fd(). */
522 flags = fcntl (fd, F_GETFD, 0);
524 (flags & FD_CLOEXEC) == 0)
527 fcntl (fd, F_SETFD, flags);
536 g_socket_create_socket (GSocketFamily family,
545 case G_SOCKET_TYPE_STREAM:
546 native_type = SOCK_STREAM;
549 case G_SOCKET_TYPE_DATAGRAM:
550 native_type = SOCK_DGRAM;
553 case G_SOCKET_TYPE_SEQPACKET:
554 native_type = SOCK_SEQPACKET;
558 g_assert_not_reached ();
563 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
564 _("Unable to create socket: %s"), _("Unknown family was specified"));
570 g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
571 _("Unable to create socket: %s"), _("Unknown protocol was specified"));
575 return g_socket (family, native_type, protocol, error);
579 g_socket_constructed (GObject *object)
581 GSocket *socket = G_SOCKET (object);
583 if (socket->priv->fd >= 0)
584 /* create socket->priv info from the fd */
585 g_socket_details_from_fd (socket);
588 /* create the fd from socket->priv info */
589 socket->priv->fd = g_socket_create_socket (socket->priv->family,
591 socket->priv->protocol,
592 &socket->priv->construct_error);
594 /* Always use native nonblocking sockets, as
595 windows sets sockets to nonblocking automatically
596 in certain operations. This way we make things work
597 the same on all platforms */
598 if (socket->priv->fd != -1)
599 set_fd_nonblocking (socket->priv->fd);
603 g_socket_get_property (GObject *object,
608 GSocket *socket = G_SOCKET (object);
609 GSocketAddress *address;
614 g_value_set_enum (value, socket->priv->family);
618 g_value_set_enum (value, socket->priv->type);
622 g_value_set_enum (value, socket->priv->protocol);
626 g_value_set_int (value, socket->priv->fd);
630 g_value_set_boolean (value, socket->priv->blocking);
633 case PROP_LISTEN_BACKLOG:
634 g_value_set_int (value, socket->priv->listen_backlog);
638 g_value_set_boolean (value, socket->priv->keepalive);
641 case PROP_LOCAL_ADDRESS:
642 address = g_socket_get_local_address (socket, NULL);
643 g_value_take_object (value, address);
646 case PROP_REMOTE_ADDRESS:
647 address = g_socket_get_remote_address (socket, NULL);
648 g_value_take_object (value, address);
652 g_value_set_uint (value, socket->priv->timeout);
656 g_value_set_uint (value, g_socket_get_ttl (socket));
660 g_value_set_boolean (value, g_socket_get_broadcast (socket));
663 case PROP_MULTICAST_LOOPBACK:
664 g_value_set_boolean (value, g_socket_get_multicast_loopback (socket));
667 case PROP_MULTICAST_TTL:
668 g_value_set_uint (value, g_socket_get_multicast_ttl (socket));
672 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
677 g_socket_set_property (GObject *object,
682 GSocket *socket = G_SOCKET (object);
687 socket->priv->family = g_value_get_enum (value);
691 socket->priv->type = g_value_get_enum (value);
695 socket->priv->protocol = g_value_get_enum (value);
699 socket->priv->fd = g_value_get_int (value);
703 g_socket_set_blocking (socket, g_value_get_boolean (value));
706 case PROP_LISTEN_BACKLOG:
707 g_socket_set_listen_backlog (socket, g_value_get_int (value));
711 g_socket_set_keepalive (socket, g_value_get_boolean (value));
715 g_socket_set_timeout (socket, g_value_get_uint (value));
719 g_socket_set_ttl (socket, g_value_get_uint (value));
723 g_socket_set_broadcast (socket, g_value_get_boolean (value));
726 case PROP_MULTICAST_LOOPBACK:
727 g_socket_set_multicast_loopback (socket, g_value_get_boolean (value));
730 case PROP_MULTICAST_TTL:
731 g_socket_set_multicast_ttl (socket, g_value_get_uint (value));
735 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
740 g_socket_finalize (GObject *object)
742 GSocket *socket = G_SOCKET (object);
745 g_clear_error (&socket->priv->construct_error);
747 if (socket->priv->fd != -1 &&
748 !socket->priv->closed)
749 g_socket_close (socket, NULL);
751 if (socket->priv->remote_address)
752 g_object_unref (socket->priv->remote_address);
755 if (socket->priv->event != WSA_INVALID_EVENT)
757 WSACloseEvent (socket->priv->event);
758 socket->priv->event = WSA_INVALID_EVENT;
761 g_assert (socket->priv->requested_conditions == NULL);
762 g_mutex_clear (&socket->priv->win32_source_lock);
765 for (i = 0; i < RECV_ADDR_CACHE_SIZE; i++)
767 if (socket->priv->recv_addr_cache[i].addr)
769 g_object_unref (socket->priv->recv_addr_cache[i].addr);
770 g_free (socket->priv->recv_addr_cache[i].native);
774 if (G_OBJECT_CLASS (g_socket_parent_class)->finalize)
775 (*G_OBJECT_CLASS (g_socket_parent_class)->finalize) (object);
779 g_socket_class_init (GSocketClass *klass)
781 GObjectClass *gobject_class G_GNUC_UNUSED = G_OBJECT_CLASS (klass);
784 /* There is no portable, thread-safe way to avoid having the process
785 * be killed by SIGPIPE when calling send() or sendmsg(), so we are
786 * forced to simply ignore the signal process-wide.
788 signal (SIGPIPE, SIG_IGN);
791 gobject_class->finalize = g_socket_finalize;
792 gobject_class->constructed = g_socket_constructed;
793 gobject_class->set_property = g_socket_set_property;
794 gobject_class->get_property = g_socket_get_property;
796 g_object_class_install_property (gobject_class, PROP_FAMILY,
797 g_param_spec_enum ("family",
799 P_("The sockets address family"),
800 G_TYPE_SOCKET_FAMILY,
801 G_SOCKET_FAMILY_INVALID,
802 G_PARAM_CONSTRUCT_ONLY |
804 G_PARAM_STATIC_STRINGS));
806 g_object_class_install_property (gobject_class, PROP_TYPE,
807 g_param_spec_enum ("type",
809 P_("The sockets type"),
811 G_SOCKET_TYPE_STREAM,
812 G_PARAM_CONSTRUCT_ONLY |
814 G_PARAM_STATIC_STRINGS));
816 g_object_class_install_property (gobject_class, PROP_PROTOCOL,
817 g_param_spec_enum ("protocol",
818 P_("Socket protocol"),
819 P_("The id of the protocol to use, or -1 for unknown"),
820 G_TYPE_SOCKET_PROTOCOL,
821 G_SOCKET_PROTOCOL_UNKNOWN,
822 G_PARAM_CONSTRUCT_ONLY |
824 G_PARAM_STATIC_STRINGS));
826 g_object_class_install_property (gobject_class, PROP_FD,
827 g_param_spec_int ("fd",
828 P_("File descriptor"),
829 P_("The sockets file descriptor"),
833 G_PARAM_CONSTRUCT_ONLY |
835 G_PARAM_STATIC_STRINGS));
837 g_object_class_install_property (gobject_class, PROP_BLOCKING,
838 g_param_spec_boolean ("blocking",
840 P_("Whether or not I/O on this socket is blocking"),
843 G_PARAM_STATIC_STRINGS));
845 g_object_class_install_property (gobject_class, PROP_LISTEN_BACKLOG,
846 g_param_spec_int ("listen-backlog",
847 P_("Listen backlog"),
848 P_("Outstanding connections in the listen queue"),
853 G_PARAM_STATIC_STRINGS));
855 g_object_class_install_property (gobject_class, PROP_KEEPALIVE,
856 g_param_spec_boolean ("keepalive",
857 P_("Keep connection alive"),
858 P_("Keep connection alive by sending periodic pings"),
861 G_PARAM_STATIC_STRINGS));
863 g_object_class_install_property (gobject_class, PROP_LOCAL_ADDRESS,
864 g_param_spec_object ("local-address",
866 P_("The local address the socket is bound to"),
867 G_TYPE_SOCKET_ADDRESS,
869 G_PARAM_STATIC_STRINGS));
871 g_object_class_install_property (gobject_class, PROP_REMOTE_ADDRESS,
872 g_param_spec_object ("remote-address",
873 P_("Remote address"),
874 P_("The remote address the socket is connected to"),
875 G_TYPE_SOCKET_ADDRESS,
877 G_PARAM_STATIC_STRINGS));
882 * The timeout in seconds on socket I/O
886 g_object_class_install_property (gobject_class, PROP_TIMEOUT,
887 g_param_spec_uint ("timeout",
889 P_("The timeout in seconds on socket I/O"),
894 G_PARAM_STATIC_STRINGS));
899 * Whether the socket should allow sending to broadcast addresses.
903 g_object_class_install_property (gobject_class, PROP_BROADCAST,
904 g_param_spec_boolean ("broadcast",
906 P_("Whether to allow sending to broadcast addresses"),
909 G_PARAM_STATIC_STRINGS));
914 * Time-to-live for outgoing unicast packets
918 g_object_class_install_property (gobject_class, PROP_TTL,
919 g_param_spec_uint ("ttl",
921 P_("Time-to-live of outgoing unicast packets"),
924 G_PARAM_STATIC_STRINGS));
927 * GSocket:multicast-loopback:
929 * Whether outgoing multicast packets loop back to the local host.
933 g_object_class_install_property (gobject_class, PROP_MULTICAST_LOOPBACK,
934 g_param_spec_boolean ("multicast-loopback",
935 P_("Multicast loopback"),
936 P_("Whether outgoing multicast packets loop back to the local host"),
939 G_PARAM_STATIC_STRINGS));
942 * GSocket:multicast-ttl:
944 * Time-to-live out outgoing multicast packets
948 g_object_class_install_property (gobject_class, PROP_MULTICAST_TTL,
949 g_param_spec_uint ("multicast-ttl",
951 P_("Time-to-live of outgoing multicast packets"),
954 G_PARAM_STATIC_STRINGS));
958 g_socket_initable_iface_init (GInitableIface *iface)
960 iface->init = g_socket_initable_init;
964 g_socket_init (GSocket *socket)
966 socket->priv = g_socket_get_instance_private (socket);
968 socket->priv->fd = -1;
969 socket->priv->blocking = TRUE;
970 socket->priv->listen_backlog = 10;
971 socket->priv->construct_error = NULL;
973 socket->priv->event = WSA_INVALID_EVENT;
974 g_mutex_init (&socket->priv->win32_source_lock);
979 g_socket_initable_init (GInitable *initable,
980 GCancellable *cancellable,
985 g_return_val_if_fail (G_IS_SOCKET (initable), FALSE);
987 socket = G_SOCKET (initable);
989 if (cancellable != NULL)
991 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
992 _("Cancellable initialization not supported"));
996 socket->priv->inited = TRUE;
998 if (socket->priv->construct_error)
1001 *error = g_error_copy (socket->priv->construct_error);
1011 * @family: the socket family to use, e.g. %G_SOCKET_FAMILY_IPV4.
1012 * @type: the socket type to use.
1013 * @protocol: the id of the protocol to use, or 0 for default.
1014 * @error: #GError for error reporting, or %NULL to ignore.
1016 * Creates a new #GSocket with the defined family, type and protocol.
1017 * If @protocol is 0 (%G_SOCKET_PROTOCOL_DEFAULT) the default protocol type
1018 * for the family and type is used.
1020 * The @protocol is a family and type specific int that specifies what
1021 * kind of protocol to use. #GSocketProtocol lists several common ones.
1022 * Many families only support one protocol, and use 0 for this, others
1023 * support several and using 0 means to use the default protocol for
1024 * the family and type.
1026 * The protocol id is passed directly to the operating
1027 * system, so you can use protocols not listed in #GSocketProtocol if you
1028 * know the protocol number used for it.
1030 * Returns: a #GSocket or %NULL on error.
1031 * Free the returned object with g_object_unref().
1036 g_socket_new (GSocketFamily family,
1038 GSocketProtocol protocol,
1041 return G_SOCKET (g_initable_new (G_TYPE_SOCKET,
1045 "protocol", protocol,
1050 * g_socket_new_from_fd:
1051 * @fd: a native socket file descriptor.
1052 * @error: #GError for error reporting, or %NULL to ignore.
1054 * Creates a new #GSocket from a native file descriptor
1055 * or winsock SOCKET handle.
1057 * This reads all the settings from the file descriptor so that
1058 * all properties should work. Note that the file descriptor
1059 * will be set to non-blocking mode, independent on the blocking
1060 * mode of the #GSocket.
1062 * Returns: a #GSocket or %NULL on error.
1063 * Free the returned object with g_object_unref().
1068 g_socket_new_from_fd (gint fd,
1071 return G_SOCKET (g_initable_new (G_TYPE_SOCKET,
1078 * g_socket_set_blocking:
1079 * @socket: a #GSocket.
1080 * @blocking: Whether to use blocking I/O or not.
1082 * Sets the blocking mode of the socket. In blocking mode
1083 * all operations block until they succeed or there is an error. In
1084 * non-blocking mode all functions return results immediately or
1085 * with a %G_IO_ERROR_WOULD_BLOCK error.
1087 * All sockets are created in blocking mode. However, note that the
1088 * platform level socket is always non-blocking, and blocking mode
1089 * is a GSocket level feature.
1094 g_socket_set_blocking (GSocket *socket,
1097 g_return_if_fail (G_IS_SOCKET (socket));
1099 blocking = !!blocking;
1101 if (socket->priv->blocking == blocking)
1104 socket->priv->blocking = blocking;
1105 g_object_notify (G_OBJECT (socket), "blocking");
1109 * g_socket_get_blocking:
1110 * @socket: a #GSocket.
1112 * Gets the blocking mode of the socket. For details on blocking I/O,
1113 * see g_socket_set_blocking().
1115 * Returns: %TRUE if blocking I/O is used, %FALSE otherwise.
1120 g_socket_get_blocking (GSocket *socket)
1122 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
1124 return socket->priv->blocking;
1128 * g_socket_set_keepalive:
1129 * @socket: a #GSocket.
1130 * @keepalive: Value for the keepalive flag
1132 * Sets or unsets the %SO_KEEPALIVE flag on the underlying socket. When
1133 * this flag is set on a socket, the system will attempt to verify that the
1134 * remote socket endpoint is still present if a sufficiently long period of
1135 * time passes with no data being exchanged. If the system is unable to
1136 * verify the presence of the remote endpoint, it will automatically close
1139 * This option is only functional on certain kinds of sockets. (Notably,
1140 * %G_SOCKET_PROTOCOL_TCP sockets.)
1142 * The exact time between pings is system- and protocol-dependent, but will
1143 * normally be at least two hours. Most commonly, you would set this flag
1144 * on a server socket if you want to allow clients to remain idle for long
1145 * periods of time, but also want to ensure that connections are eventually
1146 * garbage-collected if clients crash or become unreachable.
1151 g_socket_set_keepalive (GSocket *socket,
1154 GError *error = NULL;
1156 g_return_if_fail (G_IS_SOCKET (socket));
1158 keepalive = !!keepalive;
1159 if (socket->priv->keepalive == keepalive)
1162 if (!g_socket_set_option (socket, SOL_SOCKET, SO_KEEPALIVE,
1165 g_warning ("error setting keepalive: %s", error->message);
1166 g_error_free (error);
1170 socket->priv->keepalive = keepalive;
1171 g_object_notify (G_OBJECT (socket), "keepalive");
1175 * g_socket_get_keepalive:
1176 * @socket: a #GSocket.
1178 * Gets the keepalive mode of the socket. For details on this,
1179 * see g_socket_set_keepalive().
1181 * Returns: %TRUE if keepalive is active, %FALSE otherwise.
1186 g_socket_get_keepalive (GSocket *socket)
1188 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
1190 return socket->priv->keepalive;
1194 * g_socket_get_listen_backlog:
1195 * @socket: a #GSocket.
1197 * Gets the listen backlog setting of the socket. For details on this,
1198 * see g_socket_set_listen_backlog().
1200 * Returns: the maximum number of pending connections.
1205 g_socket_get_listen_backlog (GSocket *socket)
1207 g_return_val_if_fail (G_IS_SOCKET (socket), 0);
1209 return socket->priv->listen_backlog;
1213 * g_socket_set_listen_backlog:
1214 * @socket: a #GSocket.
1215 * @backlog: the maximum number of pending connections.
1217 * Sets the maximum number of outstanding connections allowed
1218 * when listening on this socket. If more clients than this are
1219 * connecting to the socket and the application is not handling them
1220 * on time then the new connections will be refused.
1222 * Note that this must be called before g_socket_listen() and has no
1223 * effect if called after that.
1228 g_socket_set_listen_backlog (GSocket *socket,
1231 g_return_if_fail (G_IS_SOCKET (socket));
1232 g_return_if_fail (!socket->priv->listening);
1234 if (backlog != socket->priv->listen_backlog)
1236 socket->priv->listen_backlog = backlog;
1237 g_object_notify (G_OBJECT (socket), "listen-backlog");
1242 * g_socket_get_timeout:
1243 * @socket: a #GSocket.
1245 * Gets the timeout setting of the socket. For details on this, see
1246 * g_socket_set_timeout().
1248 * Returns: the timeout in seconds
1253 g_socket_get_timeout (GSocket *socket)
1255 g_return_val_if_fail (G_IS_SOCKET (socket), 0);
1257 return socket->priv->timeout;
1261 * g_socket_set_timeout:
1262 * @socket: a #GSocket.
1263 * @timeout: the timeout for @socket, in seconds, or 0 for none
1265 * Sets the time in seconds after which I/O operations on @socket will
1266 * time out if they have not yet completed.
1268 * On a blocking socket, this means that any blocking #GSocket
1269 * operation will time out after @timeout seconds of inactivity,
1270 * returning %G_IO_ERROR_TIMED_OUT.
1272 * On a non-blocking socket, calls to g_socket_condition_wait() will
1273 * also fail with %G_IO_ERROR_TIMED_OUT after the given time. Sources
1274 * created with g_socket_create_source() will trigger after
1275 * @timeout seconds of inactivity, with the requested condition
1276 * set, at which point calling g_socket_receive(), g_socket_send(),
1277 * g_socket_check_connect_result(), etc, will fail with
1278 * %G_IO_ERROR_TIMED_OUT.
1280 * If @timeout is 0 (the default), operations will never time out
1283 * Note that if an I/O operation is interrupted by a signal, this may
1284 * cause the timeout to be reset.
1289 g_socket_set_timeout (GSocket *socket,
1292 g_return_if_fail (G_IS_SOCKET (socket));
1294 if (timeout != socket->priv->timeout)
1296 socket->priv->timeout = timeout;
1297 g_object_notify (G_OBJECT (socket), "timeout");
1303 * @socket: a #GSocket.
1305 * Gets the unicast time-to-live setting on @socket; see
1306 * g_socket_set_ttl() for more details.
1308 * Returns: the time-to-live setting on @socket
1313 g_socket_get_ttl (GSocket *socket)
1315 GError *error = NULL;
1318 g_return_val_if_fail (G_IS_SOCKET (socket), 0);
1320 if (socket->priv->family == G_SOCKET_FAMILY_IPV4)
1322 g_socket_get_option (socket, IPPROTO_IP, IP_TTL,
1325 else if (socket->priv->family == G_SOCKET_FAMILY_IPV6)
1327 g_socket_get_option (socket, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
1331 g_return_val_if_reached (0);
1335 g_warning ("error getting unicast ttl: %s", error->message);
1336 g_error_free (error);
1345 * @socket: a #GSocket.
1346 * @ttl: the time-to-live value for all unicast packets on @socket
1348 * Sets the time-to-live for outgoing unicast packets on @socket.
1349 * By default the platform-specific default value is used.
1354 g_socket_set_ttl (GSocket *socket,
1357 GError *error = NULL;
1359 g_return_if_fail (G_IS_SOCKET (socket));
1361 if (socket->priv->family == G_SOCKET_FAMILY_IPV4)
1363 g_socket_set_option (socket, IPPROTO_IP, IP_TTL,
1366 else if (socket->priv->family == G_SOCKET_FAMILY_IPV6)
1368 g_socket_set_option (socket, IPPROTO_IP, IP_TTL,
1370 g_socket_set_option (socket, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
1374 g_return_if_reached ();
1378 g_warning ("error setting unicast ttl: %s", error->message);
1379 g_error_free (error);
1383 g_object_notify (G_OBJECT (socket), "ttl");
1387 * g_socket_get_broadcast:
1388 * @socket: a #GSocket.
1390 * Gets the broadcast setting on @socket; if %TRUE,
1391 * it is possible to send packets to broadcast
1394 * Returns: the broadcast setting on @socket
1399 g_socket_get_broadcast (GSocket *socket)
1401 GError *error = NULL;
1404 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
1406 if (!g_socket_get_option (socket, SOL_SOCKET, SO_BROADCAST,
1409 g_warning ("error getting broadcast: %s", error->message);
1410 g_error_free (error);
1418 * g_socket_set_broadcast:
1419 * @socket: a #GSocket.
1420 * @broadcast: whether @socket should allow sending to broadcast
1423 * Sets whether @socket should allow sending to broadcast addresses.
1424 * This is %FALSE by default.
1429 g_socket_set_broadcast (GSocket *socket,
1432 GError *error = NULL;
1434 g_return_if_fail (G_IS_SOCKET (socket));
1436 broadcast = !!broadcast;
1438 if (!g_socket_set_option (socket, SOL_SOCKET, SO_BROADCAST,
1441 g_warning ("error setting broadcast: %s", error->message);
1442 g_error_free (error);
1446 g_object_notify (G_OBJECT (socket), "broadcast");
1450 * g_socket_get_multicast_loopback:
1451 * @socket: a #GSocket.
1453 * Gets the multicast loopback setting on @socket; if %TRUE (the
1454 * default), outgoing multicast packets will be looped back to
1455 * multicast listeners on the same host.
1457 * Returns: the multicast loopback setting on @socket
1462 g_socket_get_multicast_loopback (GSocket *socket)
1464 GError *error = NULL;
1467 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
1469 if (socket->priv->family == G_SOCKET_FAMILY_IPV4)
1471 g_socket_get_option (socket, IPPROTO_IP, IP_MULTICAST_LOOP,
1474 else if (socket->priv->family == G_SOCKET_FAMILY_IPV6)
1476 g_socket_get_option (socket, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1480 g_return_val_if_reached (FALSE);
1484 g_warning ("error getting multicast loopback: %s", error->message);
1485 g_error_free (error);
1493 * g_socket_set_multicast_loopback:
1494 * @socket: a #GSocket.
1495 * @loopback: whether @socket should receive messages sent to its
1496 * multicast groups from the local host
1498 * Sets whether outgoing multicast packets will be received by sockets
1499 * listening on that multicast address on the same host. This is %TRUE
1505 g_socket_set_multicast_loopback (GSocket *socket,
1508 GError *error = NULL;
1510 g_return_if_fail (G_IS_SOCKET (socket));
1512 loopback = !!loopback;
1514 if (socket->priv->family == G_SOCKET_FAMILY_IPV4)
1516 g_socket_set_option (socket, IPPROTO_IP, IP_MULTICAST_LOOP,
1519 else if (socket->priv->family == G_SOCKET_FAMILY_IPV6)
1521 g_socket_set_option (socket, IPPROTO_IP, IP_MULTICAST_LOOP,
1523 g_socket_set_option (socket, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
1527 g_return_if_reached ();
1531 g_warning ("error setting multicast loopback: %s", error->message);
1532 g_error_free (error);
1536 g_object_notify (G_OBJECT (socket), "multicast-loopback");
1540 * g_socket_get_multicast_ttl:
1541 * @socket: a #GSocket.
1543 * Gets the multicast time-to-live setting on @socket; see
1544 * g_socket_set_multicast_ttl() for more details.
1546 * Returns: the multicast time-to-live setting on @socket
1551 g_socket_get_multicast_ttl (GSocket *socket)
1553 GError *error = NULL;
1556 g_return_val_if_fail (G_IS_SOCKET (socket), 0);
1558 if (socket->priv->family == G_SOCKET_FAMILY_IPV4)
1560 g_socket_get_option (socket, IPPROTO_IP, IP_MULTICAST_TTL,
1563 else if (socket->priv->family == G_SOCKET_FAMILY_IPV6)
1565 g_socket_get_option (socket, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
1569 g_return_val_if_reached (FALSE);
1573 g_warning ("error getting multicast ttl: %s", error->message);
1574 g_error_free (error);
1582 * g_socket_set_multicast_ttl:
1583 * @socket: a #GSocket.
1584 * @ttl: the time-to-live value for all multicast datagrams on @socket
1586 * Sets the time-to-live for outgoing multicast datagrams on @socket.
1587 * By default, this is 1, meaning that multicast packets will not leave
1588 * the local network.
1593 g_socket_set_multicast_ttl (GSocket *socket,
1596 GError *error = NULL;
1598 g_return_if_fail (G_IS_SOCKET (socket));
1600 if (socket->priv->family == G_SOCKET_FAMILY_IPV4)
1602 g_socket_set_option (socket, IPPROTO_IP, IP_MULTICAST_TTL,
1605 else if (socket->priv->family == G_SOCKET_FAMILY_IPV6)
1607 g_socket_set_option (socket, IPPROTO_IP, IP_MULTICAST_TTL,
1609 g_socket_set_option (socket, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
1613 g_return_if_reached ();
1617 g_warning ("error setting multicast ttl: %s", error->message);
1618 g_error_free (error);
1622 g_object_notify (G_OBJECT (socket), "multicast-ttl");
1626 * g_socket_get_family:
1627 * @socket: a #GSocket.
1629 * Gets the socket family of the socket.
1631 * Returns: a #GSocketFamily
1636 g_socket_get_family (GSocket *socket)
1638 g_return_val_if_fail (G_IS_SOCKET (socket), G_SOCKET_FAMILY_INVALID);
1640 return socket->priv->family;
1644 * g_socket_get_socket_type:
1645 * @socket: a #GSocket.
1647 * Gets the socket type of the socket.
1649 * Returns: a #GSocketType
1654 g_socket_get_socket_type (GSocket *socket)
1656 g_return_val_if_fail (G_IS_SOCKET (socket), G_SOCKET_TYPE_INVALID);
1658 return socket->priv->type;
1662 * g_socket_get_protocol:
1663 * @socket: a #GSocket.
1665 * Gets the socket protocol id the socket was created with.
1666 * In case the protocol is unknown, -1 is returned.
1668 * Returns: a protocol id, or -1 if unknown
1673 g_socket_get_protocol (GSocket *socket)
1675 g_return_val_if_fail (G_IS_SOCKET (socket), -1);
1677 return socket->priv->protocol;
1682 * @socket: a #GSocket.
1684 * Returns the underlying OS socket object. On unix this
1685 * is a socket file descriptor, and on Windows this is
1686 * a Winsock2 SOCKET handle. This may be useful for
1687 * doing platform specific or otherwise unusual operations
1690 * Returns: the file descriptor of the socket.
1695 g_socket_get_fd (GSocket *socket)
1697 g_return_val_if_fail (G_IS_SOCKET (socket), -1);
1699 return socket->priv->fd;
1703 * g_socket_get_local_address:
1704 * @socket: a #GSocket.
1705 * @error: #GError for error reporting, or %NULL to ignore.
1707 * Try to get the local address of a bound socket. This is only
1708 * useful if the socket has been bound to a local address,
1709 * either explicitly or implicitly when connecting.
1711 * Returns: (transfer full): a #GSocketAddress or %NULL on error.
1712 * Free the returned object with g_object_unref().
1717 g_socket_get_local_address (GSocket *socket,
1720 struct sockaddr_storage buffer;
1721 guint len = sizeof (buffer);
1723 g_return_val_if_fail (G_IS_SOCKET (socket), NULL);
1725 if (getsockname (socket->priv->fd, (struct sockaddr *) &buffer, &len) < 0)
1727 int errsv = get_socket_errno ();
1728 g_set_error (error, G_IO_ERROR, socket_io_error_from_errno (errsv),
1729 _("could not get local address: %s"), socket_strerror (errsv));
1733 return g_socket_address_new_from_native (&buffer, len);
1737 * g_socket_get_remote_address:
1738 * @socket: a #GSocket.
1739 * @error: #GError for error reporting, or %NULL to ignore.
1741 * Try to get the remove address of a connected socket. This is only
1742 * useful for connection oriented sockets that have been connected.
1744 * Returns: (transfer full): a #GSocketAddress or %NULL on error.
1745 * Free the returned object with g_object_unref().
1750 g_socket_get_remote_address (GSocket *socket,
1753 struct sockaddr_storage buffer;
1754 guint len = sizeof (buffer);
1756 g_return_val_if_fail (G_IS_SOCKET (socket), NULL);
1758 if (socket->priv->connect_pending)
1760 if (!g_socket_check_connect_result (socket, error))
1763 socket->priv->connect_pending = FALSE;
1766 if (!socket->priv->remote_address)
1768 if (getpeername (socket->priv->fd, (struct sockaddr *) &buffer, &len) < 0)
1770 int errsv = get_socket_errno ();
1771 g_set_error (error, G_IO_ERROR, socket_io_error_from_errno (errsv),
1772 _("could not get remote address: %s"), socket_strerror (errsv));
1776 socket->priv->remote_address = g_socket_address_new_from_native (&buffer, len);
1779 return g_object_ref (socket->priv->remote_address);
1783 * g_socket_is_connected:
1784 * @socket: a #GSocket.
1786 * Check whether the socket is connected. This is only useful for
1787 * connection-oriented sockets.
1789 * Returns: %TRUE if socket is connected, %FALSE otherwise.
1794 g_socket_is_connected (GSocket *socket)
1796 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
1798 return socket->priv->connected;
1803 * @socket: a #GSocket.
1804 * @error: #GError for error reporting, or %NULL to ignore.
1806 * Marks the socket as a server socket, i.e. a socket that is used
1807 * to accept incoming requests using g_socket_accept().
1809 * Before calling this the socket must be bound to a local address using
1812 * To set the maximum amount of outstanding clients, use
1813 * g_socket_set_listen_backlog().
1815 * Returns: %TRUE on success, %FALSE on error.
1820 g_socket_listen (GSocket *socket,
1823 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
1825 if (!check_socket (socket, error))
1828 if (listen (socket->priv->fd, socket->priv->listen_backlog) < 0)
1830 int errsv = get_socket_errno ();
1832 g_set_error (error, G_IO_ERROR, socket_io_error_from_errno (errsv),
1833 _("could not listen: %s"), socket_strerror (errsv));
1837 socket->priv->listening = TRUE;
1844 * @socket: a #GSocket.
1845 * @address: a #GSocketAddress specifying the local address.
1846 * @allow_reuse: whether to allow reusing this address
1847 * @error: #GError for error reporting, or %NULL to ignore.
1849 * When a socket is created it is attached to an address family, but it
1850 * doesn't have an address in this family. g_socket_bind() assigns the
1851 * address (sometimes called name) of the socket.
1853 * It is generally required to bind to a local address before you can
1854 * receive connections. (See g_socket_listen() and g_socket_accept() ).
1855 * In certain situations, you may also want to bind a socket that will be
1856 * used to initiate connections, though this is not normally required.
1858 * If @socket is a TCP socket, then @allow_reuse controls the setting
1859 * of the `SO_REUSEADDR` socket option; normally it should be %TRUE for
1860 * server sockets (sockets that you will eventually call
1861 * g_socket_accept() on), and %FALSE for client sockets. (Failing to
1862 * set this flag on a server socket may cause g_socket_bind() to return
1863 * %G_IO_ERROR_ADDRESS_IN_USE if the server program is stopped and then
1864 * immediately restarted.)
1866 * If @socket is a UDP socket, then @allow_reuse determines whether or
1867 * not other UDP sockets can be bound to the same address at the same
1868 * time. In particular, you can have several UDP sockets bound to the
1869 * same address, and they will all receive all of the multicast and
1870 * broadcast packets sent to that address. (The behavior of unicast
1871 * UDP packets to an address with multiple listeners is not defined.)
1873 * Returns: %TRUE on success, %FALSE on error.
1878 g_socket_bind (GSocket *socket,
1879 GSocketAddress *address,
1880 gboolean reuse_address,
1883 struct sockaddr_storage addr;
1884 gboolean so_reuseaddr;
1886 gboolean so_reuseport;
1889 g_return_val_if_fail (G_IS_SOCKET (socket) && G_IS_SOCKET_ADDRESS (address), FALSE);
1891 if (!check_socket (socket, error))
1894 if (!g_socket_address_to_native (address, &addr, sizeof addr, error))
1897 /* On Windows, SO_REUSEADDR has the semantics we want for UDP
1898 * sockets, but has nasty side effects we don't want for TCP
1901 * On other platforms, we set SO_REUSEPORT, if it exists, for
1902 * UDP sockets, and SO_REUSEADDR for all sockets, hoping that
1903 * if SO_REUSEPORT doesn't exist, then SO_REUSEADDR will have
1904 * the desired semantics on UDP (as it does on Linux, although
1905 * Linux has SO_REUSEPORT too as of 3.9).
1909 so_reuseaddr = reuse_address && (socket->priv->type == G_SOCKET_TYPE_DATAGRAM);
1911 so_reuseaddr = !!reuse_address;
1915 so_reuseport = reuse_address && (socket->priv->type == G_SOCKET_TYPE_DATAGRAM);
1918 /* Ignore errors here, the only likely error is "not supported", and
1919 * this is a "best effort" thing mainly.
1921 g_socket_set_option (socket, SOL_SOCKET, SO_REUSEADDR, so_reuseaddr, NULL);
1923 g_socket_set_option (socket, SOL_SOCKET, SO_REUSEPORT, so_reuseport, NULL);
1926 if (bind (socket->priv->fd, (struct sockaddr *) &addr,
1927 g_socket_address_get_native_size (address)) < 0)
1929 int errsv = get_socket_errno ();
1931 G_IO_ERROR, socket_io_error_from_errno (errsv),
1932 _("Error binding to address: %s"), socket_strerror (errsv));
1939 #if !defined(HAVE_IF_NAMETOINDEX) && defined(G_OS_WIN32)
1941 if_nametoindex (const gchar *iface)
1943 PIP_ADAPTER_ADDRESSES addresses = NULL, p;
1944 gulong addresses_len = 0;
1948 res = GetAdaptersAddresses (AF_UNSPEC, 0, NULL, NULL, &addresses_len);
1949 if (res != NO_ERROR && res != ERROR_BUFFER_OVERFLOW)
1951 if (res == ERROR_NO_DATA)
1958 addresses = g_malloc (addresses_len);
1959 res = GetAdaptersAddresses (AF_UNSPEC, 0, NULL, addresses, &addresses_len);
1961 if (res != NO_ERROR)
1964 if (res == ERROR_NO_DATA)
1974 if (strcmp (p->AdapterName, iface) == 0)
1990 #define HAVE_IF_NAMETOINDEX 1
1994 g_socket_multicast_group_operation (GSocket *socket,
1995 GInetAddress *group,
1996 gboolean source_specific,
1998 gboolean join_group,
2001 const guint8 *native_addr;
2002 gint optname, result;
2004 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
2005 g_return_val_if_fail (socket->priv->type == G_SOCKET_TYPE_DATAGRAM, FALSE);
2006 g_return_val_if_fail (G_IS_INET_ADDRESS (group), FALSE);
2008 if (!check_socket (socket, error))
2011 native_addr = g_inet_address_to_bytes (group);
2012 if (g_inet_address_get_family (group) == G_SOCKET_FAMILY_IPV4)
2014 #ifdef HAVE_IP_MREQN
2015 struct ip_mreqn mc_req;
2017 struct ip_mreq mc_req;
2020 memset (&mc_req, 0, sizeof (mc_req));
2021 memcpy (&mc_req.imr_multiaddr, native_addr, sizeof (struct in_addr));
2023 #ifdef HAVE_IP_MREQN
2025 mc_req.imr_ifindex = if_nametoindex (iface);
2027 mc_req.imr_ifindex = 0; /* Pick any. */
2028 #elif defined(G_OS_WIN32)
2030 mc_req.imr_interface.s_addr = g_htonl (if_nametoindex (iface));
2032 mc_req.imr_interface.s_addr = g_htonl (INADDR_ANY);
2034 mc_req.imr_interface.s_addr = g_htonl (INADDR_ANY);
2037 if (source_specific)
2039 #ifdef IP_ADD_SOURCE_MEMBERSHIP
2040 optname = join_group ? IP_ADD_SOURCE_MEMBERSHIP : IP_DROP_SOURCE_MEMBERSHIP;
2042 g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
2044 _("Error joining multicast group: %s") :
2045 _("Error leaving multicast group: %s"),
2046 _("No support for source-specific multicast"));
2051 optname = join_group ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP;
2052 result = setsockopt (socket->priv->fd, IPPROTO_IP, optname,
2053 &mc_req, sizeof (mc_req));
2055 else if (g_inet_address_get_family (group) == G_SOCKET_FAMILY_IPV6)
2057 struct ipv6_mreq mc_req_ipv6;
2059 memset (&mc_req_ipv6, 0, sizeof (mc_req_ipv6));
2060 memcpy (&mc_req_ipv6.ipv6mr_multiaddr, native_addr, sizeof (struct in6_addr));
2061 #ifdef HAVE_IF_NAMETOINDEX
2063 mc_req_ipv6.ipv6mr_interface = if_nametoindex (iface);
2066 mc_req_ipv6.ipv6mr_interface = 0;
2068 optname = join_group ? IPV6_JOIN_GROUP : IPV6_LEAVE_GROUP;
2069 result = setsockopt (socket->priv->fd, IPPROTO_IPV6, optname,
2070 &mc_req_ipv6, sizeof (mc_req_ipv6));
2073 g_return_val_if_reached (FALSE);
2077 int errsv = get_socket_errno ();
2079 g_set_error (error, G_IO_ERROR, socket_io_error_from_errno (errsv),
2081 _("Error joining multicast group: %s") :
2082 _("Error leaving multicast group: %s"),
2083 socket_strerror (errsv));
2091 * g_socket_join_multicast_group:
2092 * @socket: a #GSocket.
2093 * @group: a #GInetAddress specifying the group address to join.
2094 * @iface: (allow-none): Name of the interface to use, or %NULL
2095 * @source_specific: %TRUE if source-specific multicast should be used
2096 * @error: #GError for error reporting, or %NULL to ignore.
2098 * Registers @socket to receive multicast messages sent to @group.
2099 * @socket must be a %G_SOCKET_TYPE_DATAGRAM socket, and must have
2100 * been bound to an appropriate interface and port with
2103 * If @iface is %NULL, the system will automatically pick an interface
2104 * to bind to based on @group.
2106 * If @source_specific is %TRUE, source-specific multicast as defined
2107 * in RFC 4604 is used. Note that on older platforms this may fail
2108 * with a %G_IO_ERROR_NOT_SUPPORTED error.
2110 * Returns: %TRUE on success, %FALSE on error.
2115 g_socket_join_multicast_group (GSocket *socket,
2116 GInetAddress *group,
2117 gboolean source_specific,
2121 return g_socket_multicast_group_operation (socket, group, source_specific, iface, TRUE, error);
2125 * g_socket_leave_multicast_group:
2126 * @socket: a #GSocket.
2127 * @group: a #GInetAddress specifying the group address to leave.
2128 * @iface: (allow-none): Interface used
2129 * @source_specific: %TRUE if source-specific multicast was used
2130 * @error: #GError for error reporting, or %NULL to ignore.
2132 * Removes @socket from the multicast group defined by @group, @iface,
2133 * and @source_specific (which must all have the same values they had
2134 * when you joined the group).
2136 * @socket remains bound to its address and port, and can still receive
2137 * unicast messages after calling this.
2139 * Returns: %TRUE on success, %FALSE on error.
2144 g_socket_leave_multicast_group (GSocket *socket,
2145 GInetAddress *group,
2146 gboolean source_specific,
2150 return g_socket_multicast_group_operation (socket, group, source_specific, iface, FALSE, error);
2154 * g_socket_speaks_ipv4:
2155 * @socket: a #GSocket
2157 * Checks if a socket is capable of speaking IPv4.
2159 * IPv4 sockets are capable of speaking IPv4. On some operating systems
2160 * and under some combinations of circumstances IPv6 sockets are also
2161 * capable of speaking IPv4. See RFC 3493 section 3.7 for more
2164 * No other types of sockets are currently considered as being capable
2167 * Returns: %TRUE if this socket can be used with IPv4.
2172 g_socket_speaks_ipv4 (GSocket *socket)
2174 switch (socket->priv->family)
2176 case G_SOCKET_FAMILY_IPV4:
2179 case G_SOCKET_FAMILY_IPV6:
2180 #if defined (IPPROTO_IPV6) && defined (IPV6_V6ONLY)
2184 if (!g_socket_get_option (socket,
2185 IPPROTO_IPV6, IPV6_V6ONLY,
2202 * @socket: a #GSocket.
2203 * @cancellable: (allow-none): a %GCancellable or %NULL
2204 * @error: #GError for error reporting, or %NULL to ignore.
2206 * Accept incoming connections on a connection-based socket. This removes
2207 * the first outstanding connection request from the listening socket and
2208 * creates a #GSocket object for it.
2210 * The @socket must be bound to a local address with g_socket_bind() and
2211 * must be listening for incoming connections (g_socket_listen()).
2213 * If there are no outstanding connections then the operation will block
2214 * or return %G_IO_ERROR_WOULD_BLOCK if non-blocking I/O is enabled.
2215 * To be notified of an incoming connection, wait for the %G_IO_IN condition.
2217 * Returns: (transfer full): a new #GSocket, or %NULL on error.
2218 * Free the returned object with g_object_unref().
2223 g_socket_accept (GSocket *socket,
2224 GCancellable *cancellable,
2227 GSocket *new_socket;
2230 g_return_val_if_fail (G_IS_SOCKET (socket), NULL);
2232 if (!check_socket (socket, error))
2237 if (socket->priv->blocking &&
2238 !g_socket_condition_wait (socket,
2239 G_IO_IN, cancellable, error))
2242 if ((ret = accept (socket->priv->fd, NULL, 0)) < 0)
2244 int errsv = get_socket_errno ();
2246 win32_unset_event_mask (socket, FD_ACCEPT);
2251 if (socket->priv->blocking)
2253 #ifdef WSAEWOULDBLOCK
2254 if (errsv == WSAEWOULDBLOCK)
2257 if (errsv == EWOULDBLOCK ||
2263 g_set_error (error, G_IO_ERROR,
2264 socket_io_error_from_errno (errsv),
2265 _("Error accepting connection: %s"), socket_strerror (errsv));
2271 win32_unset_event_mask (socket, FD_ACCEPT);
2275 /* The socket inherits the accepting sockets event mask and even object,
2276 we need to remove that */
2277 WSAEventSelect (ret, NULL, 0);
2283 /* We always want to set close-on-exec to protect users. If you
2284 need to so some weird inheritance to exec you can re-enable this
2285 using lower level hacks with g_socket_get_fd(). */
2286 flags = fcntl (ret, F_GETFD, 0);
2288 (flags & FD_CLOEXEC) == 0)
2290 flags |= FD_CLOEXEC;
2291 fcntl (ret, F_SETFD, flags);
2296 new_socket = g_socket_new_from_fd (ret, error);
2297 if (new_socket == NULL)
2306 new_socket->priv->protocol = socket->priv->protocol;
2313 * @socket: a #GSocket.
2314 * @address: a #GSocketAddress specifying the remote address.
2315 * @cancellable: (allow-none): a %GCancellable or %NULL
2316 * @error: #GError for error reporting, or %NULL to ignore.
2318 * Connect the socket to the specified remote address.
2320 * For connection oriented socket this generally means we attempt to make
2321 * a connection to the @address. For a connection-less socket it sets
2322 * the default address for g_socket_send() and discards all incoming datagrams
2323 * from other sources.
2325 * Generally connection oriented sockets can only connect once, but
2326 * connection-less sockets can connect multiple times to change the
2329 * If the connect call needs to do network I/O it will block, unless
2330 * non-blocking I/O is enabled. Then %G_IO_ERROR_PENDING is returned
2331 * and the user can be notified of the connection finishing by waiting
2332 * for the G_IO_OUT condition. The result of the connection must then be
2333 * checked with g_socket_check_connect_result().
2335 * Returns: %TRUE if connected, %FALSE on error.
2340 g_socket_connect (GSocket *socket,
2341 GSocketAddress *address,
2342 GCancellable *cancellable,
2345 struct sockaddr_storage buffer;
2347 g_return_val_if_fail (G_IS_SOCKET (socket) && G_IS_SOCKET_ADDRESS (address), FALSE);
2349 if (!check_socket (socket, error))
2352 if (!g_socket_address_to_native (address, &buffer, sizeof buffer, error))
2355 if (socket->priv->remote_address)
2356 g_object_unref (socket->priv->remote_address);
2357 socket->priv->remote_address = g_object_ref (address);
2361 if (connect (socket->priv->fd, (struct sockaddr *) &buffer,
2362 g_socket_address_get_native_size (address)) < 0)
2364 int errsv = get_socket_errno ();
2370 if (errsv == EINPROGRESS)
2372 if (errsv == WSAEWOULDBLOCK)
2375 if (socket->priv->blocking)
2377 if (g_socket_condition_wait (socket, G_IO_OUT, cancellable, error))
2379 if (g_socket_check_connect_result (socket, error))
2385 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_PENDING,
2386 _("Connection in progress"));
2387 socket->priv->connect_pending = TRUE;
2391 g_set_error_literal (error, G_IO_ERROR,
2392 socket_io_error_from_errno (errsv),
2393 socket_strerror (errsv));
2400 win32_unset_event_mask (socket, FD_CONNECT);
2402 socket->priv->connected = TRUE;
2408 * g_socket_check_connect_result:
2409 * @socket: a #GSocket
2410 * @error: #GError for error reporting, or %NULL to ignore.
2412 * Checks and resets the pending connect error for the socket.
2413 * This is used to check for errors when g_socket_connect() is
2414 * used in non-blocking mode.
2416 * Returns: %TRUE if no error, %FALSE otherwise, setting @error to the error
2421 g_socket_check_connect_result (GSocket *socket,
2426 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
2428 if (!check_socket (socket, error))
2431 if (!g_socket_get_option (socket, SOL_SOCKET, SO_ERROR, &value, error))
2433 g_prefix_error (error, _("Unable to get pending error: "));
2439 g_set_error_literal (error, G_IO_ERROR, socket_io_error_from_errno (value),
2440 socket_strerror (value));
2441 if (socket->priv->remote_address)
2443 g_object_unref (socket->priv->remote_address);
2444 socket->priv->remote_address = NULL;
2449 socket->priv->connected = TRUE;
2454 * g_socket_get_available_bytes:
2455 * @socket: a #GSocket
2457 * Get the amount of data pending in the OS input buffer.
2459 * If @socket is a UDP or SCTP socket, this will return the size of
2460 * just the next packet, even if additional packets are buffered after
2463 * Note that on Windows, this function is rather inefficient in the
2464 * UDP case, and so if you know any plausible upper bound on the size
2465 * of the incoming packet, it is better to just do a
2466 * g_socket_receive() with a buffer of that size, rather than calling
2467 * g_socket_get_available_bytes() first and then doing a receive of
2468 * exactly the right size.
2470 * Returns: the number of bytes that can be read from the socket
2471 * without blocking or truncating, or -1 on error.
2476 g_socket_get_available_bytes (GSocket *socket)
2479 const gint bufsize = 64 * 1024;
2480 static guchar *buf = NULL;
2486 g_return_val_if_fail (G_IS_SOCKET (socket), -1);
2488 #if defined (SO_NREAD)
2489 if (!g_socket_get_option (socket, SOL_SOCKET, SO_NREAD, &avail, NULL))
2491 #elif !defined (G_OS_WIN32)
2492 if (ioctl (socket->priv->fd, FIONREAD, &avail) < 0)
2495 if (socket->priv->type == G_SOCKET_TYPE_DATAGRAM)
2497 if (G_UNLIKELY (g_once_init_enter (&buf)))
2498 g_once_init_leave (&buf, g_malloc (bufsize));
2500 avail = recv (socket->priv->fd, buf, bufsize, MSG_PEEK);
2501 if (avail == -1 && get_socket_errno () == WSAEWOULDBLOCK)
2506 if (ioctlsocket (socket->priv->fd, FIONREAD, &avail) < 0)
2516 * @socket: a #GSocket
2517 * @buffer: (array length=size) (element-type guint8): a buffer to
2518 * read data into (which should be at least @size bytes long).
2519 * @size: the number of bytes you want to read from the socket
2520 * @cancellable: (allow-none): a %GCancellable or %NULL
2521 * @error: #GError for error reporting, or %NULL to ignore.
2523 * Receive data (up to @size bytes) from a socket. This is mainly used by
2524 * connection-oriented sockets; it is identical to g_socket_receive_from()
2525 * with @address set to %NULL.
2527 * For %G_SOCKET_TYPE_DATAGRAM and %G_SOCKET_TYPE_SEQPACKET sockets,
2528 * g_socket_receive() will always read either 0 or 1 complete messages from
2529 * the socket. If the received message is too large to fit in @buffer, then
2530 * the data beyond @size bytes will be discarded, without any explicit
2531 * indication that this has occurred.
2533 * For %G_SOCKET_TYPE_STREAM sockets, g_socket_receive() can return any
2534 * number of bytes, up to @size. If more than @size bytes have been
2535 * received, the additional data will be returned in future calls to
2536 * g_socket_receive().
2538 * If the socket is in blocking mode the call will block until there
2539 * is some data to receive, the connection is closed, or there is an
2540 * error. If there is no data available and the socket is in
2541 * non-blocking mode, a %G_IO_ERROR_WOULD_BLOCK error will be
2542 * returned. To be notified when data is available, wait for the
2543 * %G_IO_IN condition.
2545 * On error -1 is returned and @error is set accordingly.
2547 * Returns: Number of bytes read, or 0 if the connection was closed by
2548 * the peer, or -1 on error
2553 g_socket_receive (GSocket *socket,
2556 GCancellable *cancellable,
2559 return g_socket_receive_with_blocking (socket, buffer, size,
2560 socket->priv->blocking,
2561 cancellable, error);
2565 * g_socket_receive_with_blocking:
2566 * @socket: a #GSocket
2567 * @buffer: (array length=size) (element-type guint8): a buffer to
2568 * read data into (which should be at least @size bytes long).
2569 * @size: the number of bytes you want to read from the socket
2570 * @blocking: whether to do blocking or non-blocking I/O
2571 * @cancellable: (allow-none): a %GCancellable or %NULL
2572 * @error: #GError for error reporting, or %NULL to ignore.
2574 * This behaves exactly the same as g_socket_receive(), except that
2575 * the choice of blocking or non-blocking behavior is determined by
2576 * the @blocking argument rather than by @socket's properties.
2578 * Returns: Number of bytes read, or 0 if the connection was closed by
2579 * the peer, or -1 on error
2584 g_socket_receive_with_blocking (GSocket *socket,
2588 GCancellable *cancellable,
2593 g_return_val_if_fail (G_IS_SOCKET (socket) && buffer != NULL, -1);
2595 if (!check_socket (socket, error))
2598 if (g_cancellable_set_error_if_cancelled (cancellable, error))
2604 !g_socket_condition_wait (socket,
2605 G_IO_IN, cancellable, error))
2608 if ((ret = recv (socket->priv->fd, buffer, size, 0)) < 0)
2610 int errsv = get_socket_errno ();
2617 #ifdef WSAEWOULDBLOCK
2618 if (errsv == WSAEWOULDBLOCK)
2621 if (errsv == EWOULDBLOCK ||
2627 win32_unset_event_mask (socket, FD_READ);
2629 g_set_error (error, G_IO_ERROR,
2630 socket_io_error_from_errno (errsv),
2631 _("Error receiving data: %s"), socket_strerror (errsv));
2635 win32_unset_event_mask (socket, FD_READ);
2644 * g_socket_receive_from:
2645 * @socket: a #GSocket
2646 * @address: (out) (allow-none): a pointer to a #GSocketAddress
2648 * @buffer: (array length=size) (element-type guint8): a buffer to
2649 * read data into (which should be at least @size bytes long).
2650 * @size: the number of bytes you want to read from the socket
2651 * @cancellable: (allow-none): a %GCancellable or %NULL
2652 * @error: #GError for error reporting, or %NULL to ignore.
2654 * Receive data (up to @size bytes) from a socket.
2656 * If @address is non-%NULL then @address will be set equal to the
2657 * source address of the received packet.
2658 * @address is owned by the caller.
2660 * See g_socket_receive() for additional information.
2662 * Returns: Number of bytes read, or 0 if the connection was closed by
2663 * the peer, or -1 on error
2668 g_socket_receive_from (GSocket *socket,
2669 GSocketAddress **address,
2672 GCancellable *cancellable,
2680 return g_socket_receive_message (socket,
2688 /* Although we ignore SIGPIPE, gdb will still stop if the app receives
2689 * one, which can be confusing and annoying. So if possible, we want
2690 * to suppress the signal entirely.
2693 #define G_SOCKET_DEFAULT_SEND_FLAGS MSG_NOSIGNAL
2695 #define G_SOCKET_DEFAULT_SEND_FLAGS 0
2700 * @socket: a #GSocket
2701 * @buffer: (array length=size) (element-type guint8): the buffer
2702 * containing the data to send.
2703 * @size: the number of bytes to send
2704 * @cancellable: (allow-none): a %GCancellable or %NULL
2705 * @error: #GError for error reporting, or %NULL to ignore.
2707 * Tries to send @size bytes from @buffer on the socket. This is
2708 * mainly used by connection-oriented sockets; it is identical to
2709 * g_socket_send_to() with @address set to %NULL.
2711 * If the socket is in blocking mode the call will block until there is
2712 * space for the data in the socket queue. If there is no space available
2713 * and the socket is in non-blocking mode a %G_IO_ERROR_WOULD_BLOCK error
2714 * will be returned. To be notified when space is available, wait for the
2715 * %G_IO_OUT condition. Note though that you may still receive
2716 * %G_IO_ERROR_WOULD_BLOCK from g_socket_send() even if you were previously
2717 * notified of a %G_IO_OUT condition. (On Windows in particular, this is
2718 * very common due to the way the underlying APIs work.)
2720 * On error -1 is returned and @error is set accordingly.
2722 * Returns: Number of bytes written (which may be less than @size), or -1
2728 g_socket_send (GSocket *socket,
2729 const gchar *buffer,
2731 GCancellable *cancellable,
2734 return g_socket_send_with_blocking (socket, buffer, size,
2735 socket->priv->blocking,
2736 cancellable, error);
2740 * g_socket_send_with_blocking:
2741 * @socket: a #GSocket
2742 * @buffer: (array length=size) (element-type guint8): the buffer
2743 * containing the data to send.
2744 * @size: the number of bytes to send
2745 * @blocking: whether to do blocking or non-blocking I/O
2746 * @cancellable: (allow-none): a %GCancellable or %NULL
2747 * @error: #GError for error reporting, or %NULL to ignore.
2749 * This behaves exactly the same as g_socket_send(), except that
2750 * the choice of blocking or non-blocking behavior is determined by
2751 * the @blocking argument rather than by @socket's properties.
2753 * Returns: Number of bytes written (which may be less than @size), or -1
2759 g_socket_send_with_blocking (GSocket *socket,
2760 const gchar *buffer,
2763 GCancellable *cancellable,
2768 g_return_val_if_fail (G_IS_SOCKET (socket) && buffer != NULL, -1);
2770 if (!check_socket (socket, error))
2773 if (g_cancellable_set_error_if_cancelled (cancellable, error))
2779 !g_socket_condition_wait (socket,
2780 G_IO_OUT, cancellable, error))
2783 if ((ret = send (socket->priv->fd, buffer, size, G_SOCKET_DEFAULT_SEND_FLAGS)) < 0)
2785 int errsv = get_socket_errno ();
2790 #ifdef WSAEWOULDBLOCK
2791 if (errsv == WSAEWOULDBLOCK)
2792 win32_unset_event_mask (socket, FD_WRITE);
2797 #ifdef WSAEWOULDBLOCK
2798 if (errsv == WSAEWOULDBLOCK)
2801 if (errsv == EWOULDBLOCK ||
2807 g_set_error (error, G_IO_ERROR,
2808 socket_io_error_from_errno (errsv),
2809 _("Error sending data: %s"), socket_strerror (errsv));
2820 * @socket: a #GSocket
2821 * @address: (allow-none): a #GSocketAddress, or %NULL
2822 * @buffer: (array length=size) (element-type guint8): the buffer
2823 * containing the data to send.
2824 * @size: the number of bytes to send
2825 * @cancellable: (allow-none): a %GCancellable or %NULL
2826 * @error: #GError for error reporting, or %NULL to ignore.
2828 * Tries to send @size bytes from @buffer to @address. If @address is
2829 * %NULL then the message is sent to the default receiver (set by
2830 * g_socket_connect()).
2832 * See g_socket_send() for additional information.
2834 * Returns: Number of bytes written (which may be less than @size), or -1
2840 g_socket_send_to (GSocket *socket,
2841 GSocketAddress *address,
2842 const gchar *buffer,
2844 GCancellable *cancellable,
2852 return g_socket_send_message (socket,
2862 * g_socket_shutdown:
2863 * @socket: a #GSocket
2864 * @shutdown_read: whether to shut down the read side
2865 * @shutdown_write: whether to shut down the write side
2866 * @error: #GError for error reporting, or %NULL to ignore.
2868 * Shut down part of a full-duplex connection.
2870 * If @shutdown_read is %TRUE then the receiving side of the connection
2871 * is shut down, and further reading is disallowed.
2873 * If @shutdown_write is %TRUE then the sending side of the connection
2874 * is shut down, and further writing is disallowed.
2876 * It is allowed for both @shutdown_read and @shutdown_write to be %TRUE.
2878 * One example where this is used is graceful disconnect for TCP connections
2879 * where you close the sending side, then wait for the other side to close
2880 * the connection, thus ensuring that the other side saw all sent data.
2882 * Returns: %TRUE on success, %FALSE on error
2887 g_socket_shutdown (GSocket *socket,
2888 gboolean shutdown_read,
2889 gboolean shutdown_write,
2894 g_return_val_if_fail (G_IS_SOCKET (socket), TRUE);
2896 if (!check_socket (socket, error))
2900 if (!shutdown_read && !shutdown_write)
2904 if (shutdown_read && shutdown_write)
2906 else if (shutdown_read)
2911 if (shutdown_read && shutdown_write)
2913 else if (shutdown_read)
2919 if (shutdown (socket->priv->fd, how) != 0)
2921 int errsv = get_socket_errno ();
2922 g_set_error (error, G_IO_ERROR, socket_io_error_from_errno (errsv),
2923 _("Unable to shutdown socket: %s"), socket_strerror (errsv));
2927 if (shutdown_read && shutdown_write)
2928 socket->priv->connected = FALSE;
2935 * @socket: a #GSocket
2936 * @error: #GError for error reporting, or %NULL to ignore.
2938 * Closes the socket, shutting down any active connection.
2940 * Closing a socket does not wait for all outstanding I/O operations
2941 * to finish, so the caller should not rely on them to be guaranteed
2942 * to complete even if the close returns with no error.
2944 * Once the socket is closed, all other operations will return
2945 * %G_IO_ERROR_CLOSED. Closing a socket multiple times will not
2948 * Sockets will be automatically closed when the last reference
2949 * is dropped, but you might want to call this function to make sure
2950 * resources are released as early as possible.
2952 * Beware that due to the way that TCP works, it is possible for
2953 * recently-sent data to be lost if either you close a socket while the
2954 * %G_IO_IN condition is set, or else if the remote connection tries to
2955 * send something to you after you close the socket but before it has
2956 * finished reading all of the data you sent. There is no easy generic
2957 * way to avoid this problem; the easiest fix is to design the network
2958 * protocol such that the client will never send data "out of turn".
2959 * Another solution is for the server to half-close the connection by
2960 * calling g_socket_shutdown() with only the @shutdown_write flag set,
2961 * and then wait for the client to notice this and close its side of the
2962 * connection, after which the server can safely call g_socket_close().
2963 * (This is what #GTcpConnection does if you call
2964 * g_tcp_connection_set_graceful_disconnect(). But of course, this
2965 * only works if the client will close its connection after the server
2968 * Returns: %TRUE on success, %FALSE on error
2973 g_socket_close (GSocket *socket,
2978 g_return_val_if_fail (G_IS_SOCKET (socket), TRUE);
2980 if (socket->priv->closed)
2981 return TRUE; /* Multiple close not an error */
2983 if (!check_socket (socket, error))
2989 res = closesocket (socket->priv->fd);
2991 res = close (socket->priv->fd);
2995 int errsv = get_socket_errno ();
3000 g_set_error (error, G_IO_ERROR,
3001 socket_io_error_from_errno (errsv),
3002 _("Error closing socket: %s"),
3003 socket_strerror (errsv));
3009 socket->priv->connected = FALSE;
3010 socket->priv->closed = TRUE;
3011 if (socket->priv->remote_address)
3013 g_object_unref (socket->priv->remote_address);
3014 socket->priv->remote_address = NULL;
3021 * g_socket_is_closed:
3022 * @socket: a #GSocket
3024 * Checks whether a socket is closed.
3026 * Returns: %TRUE if socket is closed, %FALSE otherwise
3031 g_socket_is_closed (GSocket *socket)
3033 return socket->priv->closed;
3037 /* Broken source, used on errors */
3039 broken_dispatch (GSource *source,
3040 GSourceFunc callback,
3046 static GSourceFuncs broken_funcs =
3055 network_events_for_condition (GIOCondition condition)
3059 if (condition & G_IO_IN)
3060 event_mask |= (FD_READ | FD_ACCEPT);
3061 if (condition & G_IO_OUT)
3062 event_mask |= (FD_WRITE | FD_CONNECT);
3063 event_mask |= FD_CLOSE;
3069 ensure_event (GSocket *socket)
3071 if (socket->priv->event == WSA_INVALID_EVENT)
3072 socket->priv->event = WSACreateEvent();
3076 update_select_events (GSocket *socket)
3083 ensure_event (socket);
3086 for (l = socket->priv->requested_conditions; l != NULL; l = l->next)
3089 event_mask |= network_events_for_condition (*ptr);
3092 if (event_mask != socket->priv->selected_events)
3094 /* If no events selected, disable event so we can unset
3097 if (event_mask == 0)
3100 event = socket->priv->event;
3102 if (WSAEventSelect (socket->priv->fd, event, event_mask) == 0)
3103 socket->priv->selected_events = event_mask;
3108 add_condition_watch (GSocket *socket,
3109 GIOCondition *condition)
3111 g_mutex_lock (&socket->priv->win32_source_lock);
3112 g_assert (g_list_find (socket->priv->requested_conditions, condition) == NULL);
3114 socket->priv->requested_conditions =
3115 g_list_prepend (socket->priv->requested_conditions, condition);
3117 update_select_events (socket);
3118 g_mutex_unlock (&socket->priv->win32_source_lock);
3122 remove_condition_watch (GSocket *socket,
3123 GIOCondition *condition)
3125 g_mutex_lock (&socket->priv->win32_source_lock);
3126 g_assert (g_list_find (socket->priv->requested_conditions, condition) != NULL);
3128 socket->priv->requested_conditions =
3129 g_list_remove (socket->priv->requested_conditions, condition);
3131 update_select_events (socket);
3132 g_mutex_unlock (&socket->priv->win32_source_lock);
3136 update_condition (GSocket *socket)
3138 WSANETWORKEVENTS events;
3139 GIOCondition condition;
3141 if (WSAEnumNetworkEvents (socket->priv->fd,
3142 socket->priv->event,
3145 socket->priv->current_events |= events.lNetworkEvents;
3146 if (events.lNetworkEvents & FD_WRITE &&
3147 events.iErrorCode[FD_WRITE_BIT] != 0)
3148 socket->priv->current_errors |= FD_WRITE;
3149 if (events.lNetworkEvents & FD_CONNECT &&
3150 events.iErrorCode[FD_CONNECT_BIT] != 0)
3151 socket->priv->current_errors |= FD_CONNECT;
3155 if (socket->priv->current_events & (FD_READ | FD_ACCEPT))
3156 condition |= G_IO_IN;
3158 if (socket->priv->current_events & FD_CLOSE)
3160 int r, errsv, buffer;
3162 r = recv (socket->priv->fd, &buffer, sizeof (buffer), MSG_PEEK);
3164 errsv = get_socket_errno ();
3167 (r < 0 && errsv == WSAENOTCONN))
3168 condition |= G_IO_IN;
3170 (r < 0 && (errsv == WSAESHUTDOWN || errsv == WSAECONNRESET ||
3171 errsv == WSAECONNABORTED || errsv == WSAENETRESET)))
3172 condition |= G_IO_HUP;
3174 condition |= G_IO_ERR;
3177 if (socket->priv->closed)
3178 condition |= G_IO_HUP;
3180 /* Never report both G_IO_OUT and HUP, these are
3181 mutually exclusive (can't write to a closed socket) */
3182 if ((condition & G_IO_HUP) == 0 &&
3183 socket->priv->current_events & FD_WRITE)
3185 if (socket->priv->current_errors & FD_WRITE)
3186 condition |= G_IO_ERR;
3188 condition |= G_IO_OUT;
3192 if (socket->priv->current_events & FD_CONNECT)
3194 if (socket->priv->current_errors & FD_CONNECT)
3195 condition |= (G_IO_HUP | G_IO_ERR);
3197 condition |= G_IO_OUT;
3209 GIOCondition condition;
3210 GCancellable *cancellable;
3211 GPollFD cancel_pollfd;
3212 gint64 timeout_time;
3216 socket_source_prepare (GSource *source,
3219 GSocketSource *socket_source = (GSocketSource *)source;
3221 if (g_cancellable_is_cancelled (socket_source->cancellable))
3224 if (socket_source->timeout_time)
3228 now = g_source_get_time (source);
3229 /* Round up to ensure that we don't try again too early */
3230 *timeout = (socket_source->timeout_time - now + 999) / 1000;
3233 socket_source->socket->priv->timed_out = TRUE;
3242 socket_source->pollfd.revents = update_condition (socket_source->socket);
3245 if ((socket_source->condition & socket_source->pollfd.revents) != 0)
3252 socket_source_check (GSource *source)
3256 return socket_source_prepare (source, &timeout);
3260 socket_source_dispatch (GSource *source,
3261 GSourceFunc callback,
3264 GSocketSourceFunc func = (GSocketSourceFunc)callback;
3265 GSocketSource *socket_source = (GSocketSource *)source;
3266 GSocket *socket = socket_source->socket;
3270 socket_source->pollfd.revents = update_condition (socket_source->socket);
3272 if (socket_source->socket->priv->timed_out)
3273 socket_source->pollfd.revents |= socket_source->condition & (G_IO_IN | G_IO_OUT);
3275 ret = (*func) (socket,
3276 socket_source->pollfd.revents & socket_source->condition,
3279 if (socket->priv->timeout)
3280 socket_source->timeout_time = g_get_monotonic_time () +
3281 socket->priv->timeout * 1000000;
3284 socket_source->timeout_time = 0;
3290 socket_source_finalize (GSource *source)
3292 GSocketSource *socket_source = (GSocketSource *)source;
3295 socket = socket_source->socket;
3298 remove_condition_watch (socket, &socket_source->condition);
3301 g_object_unref (socket);
3303 if (socket_source->cancellable)
3305 g_cancellable_release_fd (socket_source->cancellable);
3306 g_object_unref (socket_source->cancellable);
3311 socket_source_closure_callback (GSocket *socket,
3312 GIOCondition condition,
3315 GClosure *closure = data;
3317 GValue params[2] = { G_VALUE_INIT, G_VALUE_INIT };
3318 GValue result_value = G_VALUE_INIT;
3321 g_value_init (&result_value, G_TYPE_BOOLEAN);
3323 g_value_init (¶ms[0], G_TYPE_SOCKET);
3324 g_value_set_object (¶ms[0], socket);
3325 g_value_init (¶ms[1], G_TYPE_IO_CONDITION);
3326 g_value_set_flags (¶ms[1], condition);
3328 g_closure_invoke (closure, &result_value, 2, params, NULL);
3330 result = g_value_get_boolean (&result_value);
3331 g_value_unset (&result_value);
3332 g_value_unset (¶ms[0]);
3333 g_value_unset (¶ms[1]);
3338 static GSourceFuncs socket_source_funcs =
3340 socket_source_prepare,
3341 socket_source_check,
3342 socket_source_dispatch,
3343 socket_source_finalize,
3344 (GSourceFunc)socket_source_closure_callback,
3348 socket_source_new (GSocket *socket,
3349 GIOCondition condition,
3350 GCancellable *cancellable)
3353 GSocketSource *socket_source;
3356 ensure_event (socket);
3358 if (socket->priv->event == WSA_INVALID_EVENT)
3360 g_warning ("Failed to create WSAEvent");
3361 return g_source_new (&broken_funcs, sizeof (GSource));
3365 condition |= G_IO_HUP | G_IO_ERR | G_IO_NVAL;
3367 source = g_source_new (&socket_source_funcs, sizeof (GSocketSource));
3368 g_source_set_name (source, "GSocket");
3369 socket_source = (GSocketSource *)source;
3371 socket_source->socket = g_object_ref (socket);
3372 socket_source->condition = condition;
3374 if (g_cancellable_make_pollfd (cancellable,
3375 &socket_source->cancel_pollfd))
3377 socket_source->cancellable = g_object_ref (cancellable);
3378 g_source_add_poll (source, &socket_source->cancel_pollfd);
3382 add_condition_watch (socket, &socket_source->condition);
3383 socket_source->pollfd.fd = (gintptr) socket->priv->event;
3385 socket_source->pollfd.fd = socket->priv->fd;
3388 socket_source->pollfd.events = condition;
3389 socket_source->pollfd.revents = 0;
3390 g_source_add_poll (source, &socket_source->pollfd);
3392 if (socket->priv->timeout)
3393 socket_source->timeout_time = g_get_monotonic_time () +
3394 socket->priv->timeout * 1000000;
3397 socket_source->timeout_time = 0;
3403 * g_socket_create_source: (skip)
3404 * @socket: a #GSocket
3405 * @condition: a #GIOCondition mask to monitor
3406 * @cancellable: (allow-none): a %GCancellable or %NULL
3408 * Creates a %GSource that can be attached to a %GMainContext to monitor
3409 * for the availibility of the specified @condition on the socket.
3411 * The callback on the source is of the #GSocketSourceFunc type.
3413 * It is meaningless to specify %G_IO_ERR or %G_IO_HUP in @condition;
3414 * these conditions will always be reported output if they are true.
3416 * @cancellable if not %NULL can be used to cancel the source, which will
3417 * cause the source to trigger, reporting the current condition (which
3418 * is likely 0 unless cancellation happened at the same time as a
3419 * condition change). You can check for this in the callback using
3420 * g_cancellable_is_cancelled().
3422 * If @socket has a timeout set, and it is reached before @condition
3423 * occurs, the source will then trigger anyway, reporting %G_IO_IN or
3424 * %G_IO_OUT depending on @condition. However, @socket will have been
3425 * marked as having had a timeout, and so the next #GSocket I/O method
3426 * you call will then fail with a %G_IO_ERROR_TIMED_OUT.
3428 * Returns: (transfer full): a newly allocated %GSource, free with g_source_unref().
3433 g_socket_create_source (GSocket *socket,
3434 GIOCondition condition,
3435 GCancellable *cancellable)
3437 g_return_val_if_fail (G_IS_SOCKET (socket) && (cancellable == NULL || G_IS_CANCELLABLE (cancellable)), NULL);
3439 return socket_source_new (socket, condition, cancellable);
3443 * g_socket_condition_check:
3444 * @socket: a #GSocket
3445 * @condition: a #GIOCondition mask to check
3447 * Checks on the readiness of @socket to perform operations.
3448 * The operations specified in @condition are checked for and masked
3449 * against the currently-satisfied conditions on @socket. The result
3452 * Note that on Windows, it is possible for an operation to return
3453 * %G_IO_ERROR_WOULD_BLOCK even immediately after
3454 * g_socket_condition_check() has claimed that the socket is ready for
3455 * writing. Rather than calling g_socket_condition_check() and then
3456 * writing to the socket if it succeeds, it is generally better to
3457 * simply try writing to the socket right away, and try again later if
3458 * the initial attempt returns %G_IO_ERROR_WOULD_BLOCK.
3460 * It is meaningless to specify %G_IO_ERR or %G_IO_HUP in condition;
3461 * these conditions will always be set in the output if they are true.
3463 * This call never blocks.
3465 * Returns: the @GIOCondition mask of the current state
3470 g_socket_condition_check (GSocket *socket,
3471 GIOCondition condition)
3473 g_return_val_if_fail (G_IS_SOCKET (socket), 0);
3475 if (!check_socket (socket, NULL))
3480 GIOCondition current_condition;
3482 condition |= G_IO_ERR | G_IO_HUP;
3484 add_condition_watch (socket, &condition);
3485 current_condition = update_condition (socket);
3486 remove_condition_watch (socket, &condition);
3487 return condition & current_condition;
3493 poll_fd.fd = socket->priv->fd;
3494 poll_fd.events = condition;
3495 poll_fd.revents = 0;
3498 result = g_poll (&poll_fd, 1, 0);
3499 while (result == -1 && get_socket_errno () == EINTR);
3501 return poll_fd.revents;
3507 * g_socket_condition_wait:
3508 * @socket: a #GSocket
3509 * @condition: a #GIOCondition mask to wait for
3510 * @cancellable: (allow-none): a #GCancellable, or %NULL
3511 * @error: a #GError pointer, or %NULL
3513 * Waits for @condition to become true on @socket. When the condition
3514 * is met, %TRUE is returned.
3516 * If @cancellable is cancelled before the condition is met, or if the
3517 * socket has a timeout set and it is reached before the condition is
3518 * met, then %FALSE is returned and @error, if non-%NULL, is set to
3519 * the appropriate value (%G_IO_ERROR_CANCELLED or
3520 * %G_IO_ERROR_TIMED_OUT).
3522 * See also g_socket_condition_timed_wait().
3524 * Returns: %TRUE if the condition was met, %FALSE otherwise
3529 g_socket_condition_wait (GSocket *socket,
3530 GIOCondition condition,
3531 GCancellable *cancellable,
3534 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
3536 return g_socket_condition_timed_wait (socket, condition, -1,
3537 cancellable, error);
3541 * g_socket_condition_timed_wait:
3542 * @socket: a #GSocket
3543 * @condition: a #GIOCondition mask to wait for
3544 * @timeout: the maximum time (in microseconds) to wait, or -1
3545 * @cancellable: (allow-none): a #GCancellable, or %NULL
3546 * @error: a #GError pointer, or %NULL
3548 * Waits for up to @timeout microseconds for @condition to become true
3549 * on @socket. If the condition is met, %TRUE is returned.
3551 * If @cancellable is cancelled before the condition is met, or if
3552 * @timeout (or the socket's #GSocket:timeout) is reached before the
3553 * condition is met, then %FALSE is returned and @error, if non-%NULL,
3554 * is set to the appropriate value (%G_IO_ERROR_CANCELLED or
3555 * %G_IO_ERROR_TIMED_OUT).
3557 * If you don't want a timeout, use g_socket_condition_wait().
3558 * (Alternatively, you can pass -1 for @timeout.)
3560 * Note that although @timeout is in microseconds for consistency with
3561 * other GLib APIs, this function actually only has millisecond
3562 * resolution, and the behavior is undefined if @timeout is not an
3563 * exact number of milliseconds.
3565 * Returns: %TRUE if the condition was met, %FALSE otherwise
3570 g_socket_condition_timed_wait (GSocket *socket,
3571 GIOCondition condition,
3573 GCancellable *cancellable,
3578 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
3580 if (!check_socket (socket, error))
3583 if (g_cancellable_set_error_if_cancelled (cancellable, error))
3586 if (socket->priv->timeout &&
3587 (timeout < 0 || socket->priv->timeout < timeout / G_USEC_PER_SEC))
3588 timeout = socket->priv->timeout * 1000;
3589 else if (timeout != -1)
3590 timeout = timeout / 1000;
3592 start_time = g_get_monotonic_time ();
3596 GIOCondition current_condition;
3602 /* Always check these */
3603 condition |= G_IO_ERR | G_IO_HUP;
3605 add_condition_watch (socket, &condition);
3608 events[num_events++] = socket->priv->event;
3610 if (g_cancellable_make_pollfd (cancellable, &cancel_fd))
3611 events[num_events++] = (WSAEVENT)cancel_fd.fd;
3614 timeout = WSA_INFINITE;
3616 current_condition = update_condition (socket);
3617 while ((condition & current_condition) == 0)
3619 res = WSAWaitForMultipleEvents (num_events, events,
3620 FALSE, timeout, FALSE);
3621 if (res == WSA_WAIT_FAILED)
3623 int errsv = get_socket_errno ();
3625 g_set_error (error, G_IO_ERROR,
3626 socket_io_error_from_errno (errsv),
3627 _("Waiting for socket condition: %s"),
3628 socket_strerror (errsv));
3631 else if (res == WSA_WAIT_TIMEOUT)
3633 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_TIMED_OUT,
3634 _("Socket I/O timed out"));
3638 if (g_cancellable_set_error_if_cancelled (cancellable, error))
3641 current_condition = update_condition (socket);
3643 if (timeout != WSA_INFINITE)
3645 timeout -= (g_get_monotonic_time () - start_time) * 1000;
3650 remove_condition_watch (socket, &condition);
3652 g_cancellable_release_fd (cancellable);
3654 return (condition & current_condition) != 0;
3662 poll_fd[0].fd = socket->priv->fd;
3663 poll_fd[0].events = condition;
3666 if (g_cancellable_make_pollfd (cancellable, &poll_fd[1]))
3671 result = g_poll (poll_fd, num, timeout);
3672 if (result != -1 || errno != EINTR)
3677 timeout -= (g_get_monotonic_time () - start_time) / 1000;
3684 g_cancellable_release_fd (cancellable);
3688 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_TIMED_OUT,
3689 _("Socket I/O timed out"));
3693 return !g_cancellable_set_error_if_cancelled (cancellable, error);
3699 * g_socket_send_message:
3700 * @socket: a #GSocket
3701 * @address: (allow-none): a #GSocketAddress, or %NULL
3702 * @vectors: (array length=num_vectors): an array of #GOutputVector structs
3703 * @num_vectors: the number of elements in @vectors, or -1
3704 * @messages: (array length=num_messages) (allow-none): a pointer to an
3705 * array of #GSocketControlMessages, or %NULL.
3706 * @num_messages: number of elements in @messages, or -1.
3707 * @flags: an int containing #GSocketMsgFlags flags
3708 * @cancellable: (allow-none): a %GCancellable or %NULL
3709 * @error: #GError for error reporting, or %NULL to ignore.
3711 * Send data to @address on @socket. This is the most complicated and
3712 * fully-featured version of this call. For easier use, see
3713 * g_socket_send() and g_socket_send_to().
3715 * If @address is %NULL then the message is sent to the default receiver
3716 * (set by g_socket_connect()).
3718 * @vectors must point to an array of #GOutputVector structs and
3719 * @num_vectors must be the length of this array. (If @num_vectors is -1,
3720 * then @vectors is assumed to be terminated by a #GOutputVector with a
3721 * %NULL buffer pointer.) The #GOutputVector structs describe the buffers
3722 * that the sent data will be gathered from. Using multiple
3723 * #GOutputVectors is more memory-efficient than manually copying
3724 * data from multiple sources into a single buffer, and more
3725 * network-efficient than making multiple calls to g_socket_send().
3727 * @messages, if non-%NULL, is taken to point to an array of @num_messages
3728 * #GSocketControlMessage instances. These correspond to the control
3729 * messages to be sent on the socket.
3730 * If @num_messages is -1 then @messages is treated as a %NULL-terminated
3733 * @flags modify how the message is sent. The commonly available arguments
3734 * for this are available in the #GSocketMsgFlags enum, but the
3735 * values there are the same as the system values, and the flags
3736 * are passed in as-is, so you can pass in system-specific flags too.
3738 * If the socket is in blocking mode the call will block until there is
3739 * space for the data in the socket queue. If there is no space available
3740 * and the socket is in non-blocking mode a %G_IO_ERROR_WOULD_BLOCK error
3741 * will be returned. To be notified when space is available, wait for the
3742 * %G_IO_OUT condition. Note though that you may still receive
3743 * %G_IO_ERROR_WOULD_BLOCK from g_socket_send() even if you were previously
3744 * notified of a %G_IO_OUT condition. (On Windows in particular, this is
3745 * very common due to the way the underlying APIs work.)
3747 * On error -1 is returned and @error is set accordingly.
3749 * Returns: Number of bytes written (which may be less than @size), or -1
3755 g_socket_send_message (GSocket *socket,
3756 GSocketAddress *address,
3757 GOutputVector *vectors,
3759 GSocketControlMessage **messages,
3762 GCancellable *cancellable,
3765 GOutputVector one_vector;
3768 g_return_val_if_fail (G_IS_SOCKET (socket), -1);
3770 if (!check_socket (socket, error))
3773 if (g_cancellable_set_error_if_cancelled (cancellable, error))
3776 if (num_vectors == -1)
3778 for (num_vectors = 0;
3779 vectors[num_vectors].buffer != NULL;
3784 if (num_messages == -1)
3786 for (num_messages = 0;
3787 messages != NULL && messages[num_messages] != NULL;
3792 if (num_vectors == 0)
3796 one_vector.buffer = &zero;
3797 one_vector.size = 1;
3799 vectors = &one_vector;
3812 msg.msg_namelen = g_socket_address_get_native_size (address);
3813 msg.msg_name = g_alloca (msg.msg_namelen);
3814 if (!g_socket_address_to_native (address, msg.msg_name, msg.msg_namelen, error))
3819 msg.msg_name = NULL;
3820 msg.msg_namelen = 0;
3825 /* this entire expression will be evaluated at compile time */
3826 if (sizeof *msg.msg_iov == sizeof *vectors &&
3827 sizeof msg.msg_iov->iov_base == sizeof vectors->buffer &&
3828 G_STRUCT_OFFSET (struct iovec, iov_base) ==
3829 G_STRUCT_OFFSET (GOutputVector, buffer) &&
3830 sizeof msg.msg_iov->iov_len == sizeof vectors->size &&
3831 G_STRUCT_OFFSET (struct iovec, iov_len) ==
3832 G_STRUCT_OFFSET (GOutputVector, size))
3833 /* ABI is compatible */
3835 msg.msg_iov = (struct iovec *) vectors;
3836 msg.msg_iovlen = num_vectors;
3839 /* ABI is incompatible */
3843 msg.msg_iov = g_newa (struct iovec, num_vectors);
3844 for (i = 0; i < num_vectors; i++)
3846 msg.msg_iov[i].iov_base = (void *) vectors[i].buffer;
3847 msg.msg_iov[i].iov_len = vectors[i].size;
3849 msg.msg_iovlen = num_vectors;
3855 struct cmsghdr *cmsg;
3858 msg.msg_controllen = 0;
3859 for (i = 0; i < num_messages; i++)
3860 msg.msg_controllen += CMSG_SPACE (g_socket_control_message_get_size (messages[i]));
3862 if (msg.msg_controllen == 0)
3863 msg.msg_control = NULL;
3866 msg.msg_control = g_alloca (msg.msg_controllen);
3867 memset (msg.msg_control, '\0', msg.msg_controllen);
3870 cmsg = CMSG_FIRSTHDR (&msg);
3871 for (i = 0; i < num_messages; i++)
3873 cmsg->cmsg_level = g_socket_control_message_get_level (messages[i]);
3874 cmsg->cmsg_type = g_socket_control_message_get_msg_type (messages[i]);
3875 cmsg->cmsg_len = CMSG_LEN (g_socket_control_message_get_size (messages[i]));
3876 g_socket_control_message_serialize (messages[i],
3878 cmsg = CMSG_NXTHDR (&msg, cmsg);
3880 g_assert (cmsg == NULL);
3885 if (socket->priv->blocking &&
3886 !g_socket_condition_wait (socket,
3887 G_IO_OUT, cancellable, error))
3890 result = sendmsg (socket->priv->fd, &msg, flags | G_SOCKET_DEFAULT_SEND_FLAGS);
3893 int errsv = get_socket_errno ();
3898 if (socket->priv->blocking &&
3899 (errsv == EWOULDBLOCK ||
3903 g_set_error (error, G_IO_ERROR,
3904 socket_io_error_from_errno (errsv),
3905 _("Error sending message: %s"), socket_strerror (errsv));
3916 struct sockaddr_storage addr;
3923 /* Win32 doesn't support control messages.
3924 Actually this is possible for raw and datagram sockets
3925 via WSASendMessage on Vista or later, but that doesn't
3927 if (num_messages != 0)
3929 g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
3930 _("GSocketControlMessage not supported on Windows"));
3935 bufs = g_newa (WSABUF, num_vectors);
3936 for (i = 0; i < num_vectors; i++)
3938 bufs[i].buf = (char *)vectors[i].buffer;
3939 bufs[i].len = (gulong)vectors[i].size;
3943 addrlen = 0; /* Avoid warning */
3946 addrlen = g_socket_address_get_native_size (address);
3947 if (!g_socket_address_to_native (address, &addr, sizeof addr, error))
3953 if (socket->priv->blocking &&
3954 !g_socket_condition_wait (socket,
3955 G_IO_OUT, cancellable, error))
3959 result = WSASendTo (socket->priv->fd,
3962 (const struct sockaddr *)&addr, addrlen,
3965 result = WSASend (socket->priv->fd,
3972 int errsv = get_socket_errno ();
3974 if (errsv == WSAEINTR)
3977 if (errsv == WSAEWOULDBLOCK)
3978 win32_unset_event_mask (socket, FD_WRITE);
3980 if (socket->priv->blocking &&
3981 errsv == WSAEWOULDBLOCK)
3984 g_set_error (error, G_IO_ERROR,
3985 socket_io_error_from_errno (errsv),
3986 _("Error sending message: %s"), socket_strerror (errsv));
3998 static GSocketAddress *
3999 cache_recv_address (GSocket *socket, struct sockaddr *native, int native_len)
4001 GSocketAddress *saddr;
4003 guint64 oldest_time = G_MAXUINT64;
4004 gint oldest_index = 0;
4006 if (native_len <= 0)
4010 for (i = 0; i < RECV_ADDR_CACHE_SIZE; i++)
4012 GSocketAddress *tmp = socket->priv->recv_addr_cache[i].addr;
4013 gpointer tmp_native = socket->priv->recv_addr_cache[i].native;
4014 gint tmp_native_len = socket->priv->recv_addr_cache[i].native_len;
4019 if (tmp_native_len != native_len)
4022 if (memcmp (tmp_native, native, native_len) == 0)
4024 saddr = g_object_ref (tmp);
4025 socket->priv->recv_addr_cache[i].last_used = g_get_monotonic_time ();
4029 if (socket->priv->recv_addr_cache[i].last_used < oldest_time)
4031 oldest_time = socket->priv->recv_addr_cache[i].last_used;
4036 saddr = g_socket_address_new_from_native (native, native_len);
4038 if (socket->priv->recv_addr_cache[oldest_index].addr)
4040 g_object_unref (socket->priv->recv_addr_cache[oldest_index].addr);
4041 g_free (socket->priv->recv_addr_cache[oldest_index].native);
4044 socket->priv->recv_addr_cache[oldest_index].native = g_memdup (native, native_len);
4045 socket->priv->recv_addr_cache[oldest_index].native_len = native_len;
4046 socket->priv->recv_addr_cache[oldest_index].addr = g_object_ref (saddr);
4047 socket->priv->recv_addr_cache[oldest_index].last_used = g_get_monotonic_time ();
4053 * g_socket_receive_message:
4054 * @socket: a #GSocket
4055 * @address: (out) (allow-none): a pointer to a #GSocketAddress
4057 * @vectors: (array length=num_vectors): an array of #GInputVector structs
4058 * @num_vectors: the number of elements in @vectors, or -1
4059 * @messages: (array length=num_messages) (allow-none): a pointer which
4060 * may be filled with an array of #GSocketControlMessages, or %NULL
4061 * @num_messages: a pointer which will be filled with the number of
4062 * elements in @messages, or %NULL
4063 * @flags: a pointer to an int containing #GSocketMsgFlags flags
4064 * @cancellable: (allow-none): a %GCancellable or %NULL
4065 * @error: a #GError pointer, or %NULL
4067 * Receive data from a socket. This is the most complicated and
4068 * fully-featured version of this call. For easier use, see
4069 * g_socket_receive() and g_socket_receive_from().
4071 * If @address is non-%NULL then @address will be set equal to the
4072 * source address of the received packet.
4073 * @address is owned by the caller.
4075 * @vector must point to an array of #GInputVector structs and
4076 * @num_vectors must be the length of this array. These structs
4077 * describe the buffers that received data will be scattered into.
4078 * If @num_vectors is -1, then @vectors is assumed to be terminated
4079 * by a #GInputVector with a %NULL buffer pointer.
4081 * As a special case, if @num_vectors is 0 (in which case, @vectors
4082 * may of course be %NULL), then a single byte is received and
4083 * discarded. This is to facilitate the common practice of sending a
4084 * single '\0' byte for the purposes of transferring ancillary data.
4086 * @messages, if non-%NULL, will be set to point to a newly-allocated
4087 * array of #GSocketControlMessage instances or %NULL if no such
4088 * messages was received. These correspond to the control messages
4089 * received from the kernel, one #GSocketControlMessage per message
4090 * from the kernel. This array is %NULL-terminated and must be freed
4091 * by the caller using g_free() after calling g_object_unref() on each
4092 * element. If @messages is %NULL, any control messages received will
4095 * @num_messages, if non-%NULL, will be set to the number of control
4096 * messages received.
4098 * If both @messages and @num_messages are non-%NULL, then
4099 * @num_messages gives the number of #GSocketControlMessage instances
4100 * in @messages (ie: not including the %NULL terminator).
4102 * @flags is an in/out parameter. The commonly available arguments
4103 * for this are available in the #GSocketMsgFlags enum, but the
4104 * values there are the same as the system values, and the flags
4105 * are passed in as-is, so you can pass in system-specific flags too
4106 * (and g_socket_receive_message() may pass system-specific flags out).
4108 * As with g_socket_receive(), data may be discarded if @socket is
4109 * %G_SOCKET_TYPE_DATAGRAM or %G_SOCKET_TYPE_SEQPACKET and you do not
4110 * provide enough buffer space to read a complete message. You can pass
4111 * %G_SOCKET_MSG_PEEK in @flags to peek at the current message without
4112 * removing it from the receive queue, but there is no portable way to find
4113 * out the length of the message other than by reading it into a
4114 * sufficiently-large buffer.
4116 * If the socket is in blocking mode the call will block until there
4117 * is some data to receive, the connection is closed, or there is an
4118 * error. If there is no data available and the socket is in
4119 * non-blocking mode, a %G_IO_ERROR_WOULD_BLOCK error will be
4120 * returned. To be notified when data is available, wait for the
4121 * %G_IO_IN condition.
4123 * On error -1 is returned and @error is set accordingly.
4125 * Returns: Number of bytes read, or 0 if the connection was closed by
4126 * the peer, or -1 on error
4131 g_socket_receive_message (GSocket *socket,
4132 GSocketAddress **address,
4133 GInputVector *vectors,
4135 GSocketControlMessage ***messages,
4138 GCancellable *cancellable,
4141 GInputVector one_vector;
4144 g_return_val_if_fail (G_IS_SOCKET (socket), -1);
4146 if (!check_socket (socket, error))
4149 if (g_cancellable_set_error_if_cancelled (cancellable, error))
4152 if (num_vectors == -1)
4154 for (num_vectors = 0;
4155 vectors[num_vectors].buffer != NULL;
4160 if (num_vectors == 0)
4162 one_vector.buffer = &one_byte;
4163 one_vector.size = 1;
4165 vectors = &one_vector;
4172 struct sockaddr_storage one_sockaddr;
4177 msg.msg_name = &one_sockaddr;
4178 msg.msg_namelen = sizeof (struct sockaddr_storage);
4182 msg.msg_name = NULL;
4183 msg.msg_namelen = 0;
4187 /* this entire expression will be evaluated at compile time */
4188 if (sizeof *msg.msg_iov == sizeof *vectors &&
4189 sizeof msg.msg_iov->iov_base == sizeof vectors->buffer &&
4190 G_STRUCT_OFFSET (struct iovec, iov_base) ==
4191 G_STRUCT_OFFSET (GInputVector, buffer) &&
4192 sizeof msg.msg_iov->iov_len == sizeof vectors->size &&
4193 G_STRUCT_OFFSET (struct iovec, iov_len) ==
4194 G_STRUCT_OFFSET (GInputVector, size))
4195 /* ABI is compatible */
4197 msg.msg_iov = (struct iovec *) vectors;
4198 msg.msg_iovlen = num_vectors;
4201 /* ABI is incompatible */
4205 msg.msg_iov = g_newa (struct iovec, num_vectors);
4206 for (i = 0; i < num_vectors; i++)
4208 msg.msg_iov[i].iov_base = vectors[i].buffer;
4209 msg.msg_iov[i].iov_len = vectors[i].size;
4211 msg.msg_iovlen = num_vectors;
4215 msg.msg_control = g_alloca (2048);
4216 msg.msg_controllen = 2048;
4220 msg.msg_flags = *flags;
4224 /* We always set the close-on-exec flag so we don't leak file
4225 * descriptors into child processes. Note that gunixfdmessage.c
4226 * will later call fcntl (fd, FD_CLOEXEC), but that isn't atomic.
4228 #ifdef MSG_CMSG_CLOEXEC
4229 msg.msg_flags |= MSG_CMSG_CLOEXEC;
4235 if (socket->priv->blocking &&
4236 !g_socket_condition_wait (socket,
4237 G_IO_IN, cancellable, error))
4240 result = recvmsg (socket->priv->fd, &msg, msg.msg_flags);
4241 #ifdef MSG_CMSG_CLOEXEC
4242 if (result < 0 && get_socket_errno () == EINVAL)
4244 /* We must be running on an old kernel. Call without the flag. */
4245 msg.msg_flags &= ~(MSG_CMSG_CLOEXEC);
4246 result = recvmsg (socket->priv->fd, &msg, msg.msg_flags);
4252 int errsv = get_socket_errno ();
4257 if (socket->priv->blocking &&
4258 (errsv == EWOULDBLOCK ||
4262 g_set_error (error, G_IO_ERROR,
4263 socket_io_error_from_errno (errsv),
4264 _("Error receiving message: %s"), socket_strerror (errsv));
4271 /* decode address */
4272 if (address != NULL)
4274 *address = cache_recv_address (socket, msg.msg_name, msg.msg_namelen);
4277 /* decode control messages */
4279 GPtrArray *my_messages = NULL;
4280 struct cmsghdr *cmsg;
4282 if (msg.msg_controllen >= sizeof (struct cmsghdr))
4284 for (cmsg = CMSG_FIRSTHDR (&msg); cmsg; cmsg = CMSG_NXTHDR (&msg, cmsg))
4286 GSocketControlMessage *message;
4288 message = g_socket_control_message_deserialize (cmsg->cmsg_level,
4290 cmsg->cmsg_len - ((char *)CMSG_DATA (cmsg) - (char *)cmsg),
4292 if (message == NULL)
4293 /* We've already spewed about the problem in the
4294 deserialization code, so just continue */
4297 if (messages == NULL)
4299 /* we have to do it this way if the user ignores the
4300 * messages so that we will close any received fds.
4302 g_object_unref (message);
4306 if (my_messages == NULL)
4307 my_messages = g_ptr_array_new ();
4308 g_ptr_array_add (my_messages, message);
4314 *num_messages = my_messages != NULL ? my_messages->len : 0;
4318 if (my_messages == NULL)
4324 g_ptr_array_add (my_messages, NULL);
4325 *messages = (GSocketControlMessage **) g_ptr_array_free (my_messages, FALSE);
4330 g_assert (my_messages == NULL);
4334 /* capture the flags */
4336 *flags = msg.msg_flags;
4342 struct sockaddr_storage addr;
4344 DWORD bytes_received;
4351 bufs = g_newa (WSABUF, num_vectors);
4352 for (i = 0; i < num_vectors; i++)
4354 bufs[i].buf = (char *)vectors[i].buffer;
4355 bufs[i].len = (gulong)vectors[i].size;
4367 if (socket->priv->blocking &&
4368 !g_socket_condition_wait (socket,
4369 G_IO_IN, cancellable, error))
4372 addrlen = sizeof addr;
4374 result = WSARecvFrom (socket->priv->fd,
4376 &bytes_received, &win_flags,
4377 (struct sockaddr *)&addr, &addrlen,
4380 result = WSARecv (socket->priv->fd,
4382 &bytes_received, &win_flags,
4386 int errsv = get_socket_errno ();
4388 if (errsv == WSAEINTR)
4391 win32_unset_event_mask (socket, FD_READ);
4393 if (socket->priv->blocking &&
4394 errsv == WSAEWOULDBLOCK)
4397 g_set_error (error, G_IO_ERROR,
4398 socket_io_error_from_errno (errsv),
4399 _("Error receiving message: %s"), socket_strerror (errsv));
4403 win32_unset_event_mask (socket, FD_READ);
4407 /* decode address */
4408 if (address != NULL)
4410 *address = cache_recv_address (socket, (struct sockaddr *)&addr, addrlen);
4413 /* capture the flags */
4417 if (messages != NULL)
4419 if (num_messages != NULL)
4422 return bytes_received;
4428 * g_socket_get_credentials:
4429 * @socket: a #GSocket.
4430 * @error: #GError for error reporting, or %NULL to ignore.
4432 * Returns the credentials of the foreign process connected to this
4433 * socket, if any (e.g. it is only supported for %G_SOCKET_FAMILY_UNIX
4436 * If this operation isn't supported on the OS, the method fails with
4437 * the %G_IO_ERROR_NOT_SUPPORTED error. On Linux this is implemented
4438 * by reading the %SO_PEERCRED option on the underlying socket.
4440 * Other ways to obtain credentials from a foreign peer includes the
4441 * #GUnixCredentialsMessage type and
4442 * g_unix_connection_send_credentials() /
4443 * g_unix_connection_receive_credentials() functions.
4445 * Returns: (transfer full): %NULL if @error is set, otherwise a #GCredentials object
4446 * that must be freed with g_object_unref().
4451 g_socket_get_credentials (GSocket *socket,
4456 g_return_val_if_fail (G_IS_SOCKET (socket), NULL);
4457 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
4461 #if G_CREDENTIALS_SOCKET_GET_CREDENTIALS_SUPPORTED
4465 guint8 native_creds_buf[G_CREDENTIALS_NATIVE_SIZE];
4466 socklen_t optlen = sizeof (native_creds_buf);
4468 if (getsockopt (socket->priv->fd,
4474 ret = g_credentials_new ();
4475 g_credentials_set_native (ret,
4476 G_CREDENTIALS_NATIVE_TYPE,
4480 #elif G_CREDENTIALS_USE_SOLARIS_UCRED
4482 ucred_t *ucred = NULL;
4484 if (getpeerucred (socket->priv->fd, &ucred) == 0)
4486 ret = g_credentials_new ();
4487 g_credentials_set_native (ret,
4488 G_CREDENTIALS_TYPE_SOLARIS_UCRED,
4494 #error "G_CREDENTIALS_SOCKET_GET_CREDENTIALS_SUPPORTED is set but this is no code for this platform"
4499 int errsv = get_socket_errno ();
4503 socket_io_error_from_errno (errsv),
4504 _("Unable to read socket credentials: %s"),
4505 socket_strerror (errsv));
4510 g_set_error_literal (error,
4512 G_IO_ERROR_NOT_SUPPORTED,
4513 _("g_socket_get_credentials not implemented for this OS"));
4520 * g_socket_get_option:
4521 * @socket: a #GSocket
4522 * @level: the "API level" of the option (eg, `SOL_SOCKET`)
4523 * @optname: the "name" of the option (eg, `SO_BROADCAST`)
4524 * @value: (out): return location for the option value
4525 * @error: #GError for error reporting, or %NULL to ignore.
4527 * Gets the value of an integer-valued option on @socket, as with
4528 * getsockopt(). (If you need to fetch a non-integer-valued option,
4529 * you will need to call getsockopt() directly.)
4531 * The [<gio/gnetworking.h>][gio-gnetworking.h]
4532 * header pulls in system headers that will define most of the
4533 * standard/portable socket options. For unusual socket protocols or
4534 * platform-dependent options, you may need to include additional
4537 * Note that even for socket options that are a single byte in size,
4538 * @value is still a pointer to a #gint variable, not a #guchar;
4539 * g_socket_get_option() will handle the conversion internally.
4541 * Returns: success or failure. On failure, @error will be set, and
4542 * the system error value (`errno` or WSAGetLastError()) will still
4543 * be set to the result of the getsockopt() call.
4548 g_socket_get_option (GSocket *socket,
4556 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
4559 size = sizeof (gint);
4560 if (getsockopt (socket->priv->fd, level, optname, value, &size) != 0)
4562 int errsv = get_socket_errno ();
4564 g_set_error_literal (error,
4566 socket_io_error_from_errno (errsv),
4567 socket_strerror (errsv));
4569 /* Reset errno in case the caller wants to look at it */
4575 #if G_BYTE_ORDER == G_BIG_ENDIAN
4576 /* If the returned value is smaller than an int then we need to
4577 * slide it over into the low-order bytes of *value.
4579 if (size != sizeof (gint))
4580 *value = *value >> (8 * (sizeof (gint) - size));
4587 * g_socket_set_option:
4588 * @socket: a #GSocket
4589 * @level: the "API level" of the option (eg, `SOL_SOCKET`)
4590 * @optname: the "name" of the option (eg, `SO_BROADCAST`)
4591 * @value: the value to set the option to
4592 * @error: #GError for error reporting, or %NULL to ignore.
4594 * Sets the value of an integer-valued option on @socket, as with
4595 * setsockopt(). (If you need to set a non-integer-valued option,
4596 * you will need to call setsockopt() directly.)
4598 * The [<gio/gnetworking.h>][gio-gnetworking.h]
4599 * header pulls in system headers that will define most of the
4600 * standard/portable socket options. For unusual socket protocols or
4601 * platform-dependent options, you may need to include additional
4604 * Returns: success or failure. On failure, @error will be set, and
4605 * the system error value (`errno` or WSAGetLastError()) will still
4606 * be set to the result of the setsockopt() call.
4611 g_socket_set_option (GSocket *socket,
4619 g_return_val_if_fail (G_IS_SOCKET (socket), FALSE);
4621 if (setsockopt (socket->priv->fd, level, optname, &value, sizeof (gint)) == 0)
4624 #if !defined (__linux__) && !defined (G_OS_WIN32)
4625 /* Linux and Windows let you set a single-byte value from an int,
4626 * but most other platforms don't.
4628 if (errno == EINVAL && value >= SCHAR_MIN && value <= CHAR_MAX)
4630 #if G_BYTE_ORDER == G_BIG_ENDIAN
4631 value = value << (8 * (sizeof (gint) - 1));
4633 if (setsockopt (socket->priv->fd, level, optname, &value, 1) == 0)
4638 errsv = get_socket_errno ();
4640 g_set_error_literal (error,
4642 socket_io_error_from_errno (errsv),
4643 socket_strerror (errsv));