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Problem: UDP does not support ZMQ_MULTICAST_HOPS

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Solution: add support for ZMQ_MULTICAST_HOPS (IP_MULTICAST_TTL)
This commit is contained in:
Conrad Parker
2018-09-13 10:36:26 +08:00
parent 7064c3a55f
commit 22083d7d62
1 changed files with 15 additions and 0 deletions
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15
src/udp_engine.cpp
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@@ -149,6 +149,21 @@ void zmq::udp_engine_t::plug (io_thread_t *io_thread_, session_base_t *session_)
errno_assert (rc == 0);
#endif
int hops = _options.multicast_hops;
if (hops > 0) {
rc = setsockopt (_fd, level, IP_MULTICAST_TTL,
reinterpret_cast<char *> (&hops),
sizeof (hops));
} else {
rc = 0;
}
#ifdef ZMQ_HAVE_WINDOWS
wsa_assert (rc != SOCKET_ERROR);
#else
errno_assert (rc == 0);
#endif
if (out->family () == AF_INET6) {
int bind_if = udp_addr->bind_if ();