Update.

	* inet/netinet/in.h: Define struct ip_msfilter, IP_MSFILTER_SIZE,
	struct group_filter, and GROUP_FILTER_SIZE.
	* include/sys/socket.h: Declare __getsockopt.
	* sysdeps/unix/sysv/linux/setipv4sourcefilter.c: New file.
	* sysdeps/unix/sysv/linux/getipv4sourcefilter.c: New file.
	* sysdeps/unix/sysv/linux/setsourcefilter.c: New file.
	* sysdeps/unix/sysv/linux/getsourcefilter.c: New file.

1 files changed, 65 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/setsourcefilter.c b/sysdeps/unix/sysv/linux/setsourcefilter.c
new file mode 100644
index 0000000000..f9f75c43cd
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/setsourcefilter.c
@@ -0,0 +1,65 @@
+/* Set source filter.  Linux version.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <alloca.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+
+
+int
+setsourcefilter (int s, uint32_t interface, struct sockaddr *group,
+		 socklen_t grouplen, uint32_t fmode, uint32_t numsrc,
+		 struct sockaddr_storage *slist)
+{
+  /* We have to create an struct ip_msfilter object which we can pass
+     to the kernel.  */
+  size_t needed = GROUP_FILTER_SIZE (numsrc);
+  int use_malloc = __libc_use_alloca (needed);
+
+  struct group_filter *gf;
+  if (use_malloc)
+    {
+      gf = (struct group_filter *) malloc (needed);
+      if (gf == NULL)
+	return -1;
+    }
+  else
+    gf = (struct group_filter *) alloca (needed);
+
+  gf->gf_interface = interface;
+  memcpy (&gf->gf_group, group, grouplen);
+  gf->gf_fmode = fmode;
+  gf->gf_numsrc = numsrc;
+  memcpy (gf->gf_slist, slist, numsrc * sizeof (struct sockaddr_storage));
+
+  int result = __setsockopt (s, SOL_IP, MCAST_MSFILTER, gf, needed);
+
+  if (use_malloc)
+    {
+      int save_errno = errno;
+      free (gf);
+      __set_errno (save_errno);
+    }
+
+  return result;
+}