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--- a/mcproxy/src/utils/mc_socket.cpp
+++ b/mcproxy/src/utils/mc_socket.cpp
@@ -37,6 +37,10 @@
#include <numeric>
#include <unistd.h>
+#ifndef __GLIBC__
+#include "sourcefilter.cpp"
+#endif /* __GLIBC__ */
+
std::string ipAddrResolver(std::string ipAddr)
{
std::string str[][2] = {
--- /dev/null
+++ b/mcproxy/src/utils/sourcefilter.cpp
@@ -0,0 +1,165 @@
+/* Get source filter. Linux version.
+ Copyright (C) 2004-2014 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 <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <netinet/in.h>
+#include <netpacket/packet.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+
+static const struct
+{
+ int sol;
+ int af;
+ socklen_t size;
+} sol_map[] =
+ {
+ /* Sort the array according to importance of the protocols. Add
+ more protocols when they become available. */
+ { SOL_IP, AF_INET, sizeof (struct sockaddr_in) },
+ { SOL_IPV6, AF_INET6, sizeof (struct sockaddr_in6) },
+ { SOL_PACKET, AF_PACKET, sizeof (struct sockaddr_ll) }
+ };
+#define NSOL_MAP (sizeof (sol_map) / sizeof (sol_map[0]))
+
+
+/* Try to determine the socket level value. Ideally both side and
+ family are set. But sometimes only the size is correct and the
+ family value might be bogus. Loop over the array entries and look
+ for a perfect match or the first match based on size. */
+static int
+__get_sol (int af, socklen_t len)
+{
+ int first_size_sol = -1;
+
+ for (size_t cnt = 0; cnt < NSOL_MAP; ++cnt)
+ {
+ /* Just a test so that we make sure the special value used to
+ signal the "we have so far no socket level value" is OK. */
+ assert (sol_map[cnt].sol != -1);
+
+ if (len == sol_map[cnt].size)
+ {
+ /* The size matches, which is a requirement. If the family
+ matches, too, we have a winner. Otherwise we remember the
+ socket level value for this protocol if it is the first
+ match. */
+ if (af == sol_map[cnt].af)
+ /* Bingo! */
+ return sol_map[cnt].sol;
+
+ if (first_size_sol == -1)
+ first_size_sol = sol_map[cnt].sol;
+ }
+ }
+
+ return first_size_sol;
+}
+
+
+int
+getsourcefilter (int s, uint32_t interface, const 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. */
+ socklen_t needed = GROUP_FILTER_SIZE (*numsrc);
+ struct group_filter *gf;
+ gf = (struct group_filter *) malloc (needed);
+ if (gf == NULL)
+ return -1;
+
+ gf->gf_interface = interface;
+ memcpy (&gf->gf_group, group, grouplen);
+ gf->gf_numsrc = *numsrc;
+
+ /* We need to provide the appropriate socket level value. */
+ int result;
+ int sol = __get_sol (group->sa_family, grouplen);
+ if (sol == -1)
+ {
+ errno = EINVAL;
+ result = -1;
+ }
+ else
+ {
+ result = getsockopt (s, sol, MCAST_MSFILTER, gf, &needed);
+
+ /* If successful, copy the results to the places the caller wants
+ them in. */
+ if (result == 0)
+ {
+ *fmode = gf->gf_fmode;
+ memcpy (slist, gf->gf_slist,
+ MIN (*numsrc, gf->gf_numsrc)
+ * sizeof (struct sockaddr_storage));
+ *numsrc = gf->gf_numsrc;
+ }
+ }
+
+ int save_errno = errno;
+ free (gf);
+ errno = save_errno;
+
+ return result;
+}
+
+
+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);
+
+ struct group_filter *gf;
+ 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)
+ {
+ errno = EINVAL;
+ result = -1;
+ }
+ else
+ result = setsockopt (s, sol, MCAST_MSFILTER, gf, needed);
+
+ int save_errno = errno;
+ free (gf);
+ errno = save_errno;
+
+ return result;
+}
|
