1 files changed, 73 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/getipv4sourcefilter.c b/REORG.TODO/sysdeps/unix/sysv/linux/getipv4sourcefilter.c
new file mode 100644
index 0000000000..004c83e916
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/getipv4sourcefilter.c
@@ -0,0 +1,73 @@
+/* Get IPv4 source filter.  Linux version.
+   Copyright (C) 2004-2017 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <alloca.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <netinet/in.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+
+
+int
+getipv4sourcefilter (int s, struct in_addr interface, struct in_addr group,
+		     uint32_t *fmode, uint32_t *numsrc, struct in_addr *slist)
+{
+  /* We have to create an struct ip_msfilter object which we can pass
+     to the kernel.  */
+  socklen_t needed = IP_MSFILTER_SIZE (*numsrc);
+  int use_alloca = __libc_use_alloca (needed);
+
+  struct ip_msfilter *imsf;
+  if (use_alloca)
+    imsf = (struct ip_msfilter *) alloca (needed);
+  else
+    {
+      imsf = (struct ip_msfilter *) malloc (needed);
+      if (imsf == NULL)
+	return -1;
+    }
+
+  imsf->imsf_multiaddr = group;
+  imsf->imsf_interface = interface;
+  imsf->imsf_numsrc = *numsrc;
+
+  int result = __getsockopt (s, SOL_IP, IP_MSFILTER, imsf, &needed);
+
+  /* If successful, copy the results to the places the caller wants
+     them in.  */
+  if (result == 0)
+    {
+      *fmode = imsf->imsf_fmode;
+      memcpy (slist, imsf->imsf_slist,
+	      MIN (*numsrc, imsf->imsf_numsrc) * sizeof (struct in_addr));
+      *numsrc = imsf->imsf_numsrc;
+    }
+
+  if (! use_alloca)
+    {
+      int save_errno = errno;
+      free (imsf);
+      __set_errno (save_errno);
+    }
+
+  return result;
+}