Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 78 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/setsourcefilter.c b/REORG.TODO/sysdeps/unix/sysv/linux/setsourcefilter.c
new file mode 100644
index 0000000000..b4160ff4d8
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/setsourcefilter.c
@@ -0,0 +1,78 @@
+/* Set 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/socket.h>
+
+
+/* Defined in getsourcefilter.c.  */
+extern int __get_sol (int af, socklen_t len);
+
+
+int
+setsourcefilter (int s, uint32_t interface, const struct sockaddr *group,
+		 socklen_t grouplen, uint32_t fmode, uint32_t numsrc,
+		 const 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_alloca = __libc_use_alloca (needed);
+
+  struct group_filter *gf;
+  if (use_alloca)
+    gf = (struct group_filter *) alloca (needed);
+  else
+    {
+      gf = (struct group_filter *) malloc (needed);
+      if (gf == NULL)
+	return -1;
+    }
+
+  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));
+
+  /* We need to provide the appropriate socket level value.  */
+  int result;
+  int sol = __get_sol (group->sa_family, grouplen);
+  if (sol == -1)
+    {
+      __set_errno (EINVAL);
+      result = -1;
+    }
+  else
+    result = __setsockopt (s, sol, MCAST_MSFILTER, gf, needed);
+
+  if (! use_alloca)
+    {
+      int save_errno = errno;
+      free (gf);
+      __set_errno (save_errno);
+    }
+
+  return result;
+}