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GSocket: Add possibility to join a multicast group only on a specific interface

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This commit is contained in:
Sebastian Dröge 2012-01-13 12:37:31 +01:00
parent a62d1bb747
commit 97f25892ea
4 changed files with 32 additions and 3 deletions
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4
configure.ac
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@ -1109,6 +1109,10 @@ AC_CHECK_HEADER([linux/netlink.h],
[#include <sys/socket.h>])
AM_CONDITIONAL(HAVE_NETLINK, [test "$ac_cv_header_linux_netlink_h" = "yes"])
AC_CHECK_TYPE([struct ip_mreqn], [
AC_DEFINE(HAVE_IP_MREQN,, [Define if we have struct ip_mreqn])],,
[#include <netinet/in.h>])
case $host in
*-*-solaris* )
AC_DEFINE(_XOPEN_SOURCE_EXTENDED, 1, Needed to get declarations for msg_control and msg_controllen on Solaris)

1
gio/gnetworkingprivate.h
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@ -53,6 +53,7 @@
#if defined(HAVE_ARPA_NAMESER_COMPAT_H) && !defined(GETSHORT)
#include <arpa/nameser_compat.h>
#endif
#include <net/if.h>
#ifndef T_SRV
#define T_SRV 33

26
gio/gsocket.c
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@ -47,6 +47,8 @@
#include <sys/uio.h>
#endif
#include <net/if.h>
#include "gcancellable.h"
#include "gioenumtypes.h"
#include "ginetaddress.h"
@ -1688,6 +1690,7 @@ g_socket_bind (GSocket *socket,
static gboolean
g_socket_multicast_group_operation (GSocket *socket,
GInetAddress *group,
const gchar *interface,
gboolean join_group,
GError **error)
{
@ -1705,10 +1708,22 @@ g_socket_multicast_group_operation (GSocket *socket,
native_addr = g_inet_address_to_bytes (group);
if (socket->priv->family == G_SOCKET_FAMILY_IPV4)
{
#ifdef HAVE_IP_MREQN
struct ip_mreqn mc_req;
#else
struct ip_mreq mc_req;
#endif
memcpy (&mc_req.imr_multiaddr, native_addr, sizeof (struct in_addr));
#ifdef HAVE_IP_MREQN
if (interface)
mc_req.imr_ifindex = if_nametoindex (interface);
else
mc_req.imr_ifindex = 0; /* Pick any. */
#else
mc_req.imr_interface.s_addr = g_htonl (INADDR_ANY);
#endif
optname = join_group ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP;
result = setsockopt (socket->priv->fd, IPPROTO_IP, optname,
@ -1719,6 +1734,9 @@ g_socket_multicast_group_operation (GSocket *socket,
struct ipv6_mreq mc_req_ipv6;
memcpy (&mc_req_ipv6.ipv6mr_multiaddr, native_addr, sizeof (struct in6_addr));
if (interface)
mc_req_ipv6.ipv6mr_interface = if_nametoindex (interface);
else
mc_req_ipv6.ipv6mr_interface = 0;
optname = join_group ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP;
@ -1747,6 +1765,7 @@ g_socket_multicast_group_operation (GSocket *socket,
* g_socket_join_multicast_group:
* @socket: a #GSocket.
* @group: a #GInetAddress specifying the group address to join.
* @interface: Interface to use
* @error: #GError for error reporting, or %NULL to ignore.
*
* Registers @socket to receive multicast messages sent to @group.
@ -1761,15 +1780,17 @@ g_socket_multicast_group_operation (GSocket *socket,
gboolean
g_socket_join_multicast_group (GSocket *socket,
GInetAddress *group,
const gchar *interface,
GError **error)
{
return g_socket_multicast_group_operation (socket, group, TRUE, error);
return g_socket_multicast_group_operation (socket, group, interface, TRUE, error);
}
/**
* g_socket_leave_multicast_group:
* @socket: a #GSocket.
* @group: a #GInetAddress specifying the group address to leave.
* @interface: Interface to use
* @error: #GError for error reporting, or %NULL to ignore.
*
* Removes @socket from the multicast group @group (while still
@ -1782,9 +1803,10 @@ g_socket_join_multicast_group (GSocket *socket,
gboolean
g_socket_leave_multicast_group (GSocket *socket,
GInetAddress *group,
const gchar *interface,
GError **error)
{
return g_socket_multicast_group_operation (socket, group, FALSE, error);
return g_socket_multicast_group_operation (socket, group, interface, FALSE, error);
}
/**

2
gio/gsocket.h
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@ -113,9 +113,11 @@ gboolean g_socket_bind (GSocket
GError **error);
gboolean g_socket_join_multicast_group (GSocket *socket,
GInetAddress *group,
const gchar *interface,
GError **error);
gboolean g_socket_leave_multicast_group (GSocket *socket,
GInetAddress *group,
const gchar *interface,
GError **error);
gboolean g_socket_connect (GSocket *socket,
GSocketAddress *address,