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Merge pull request #1888 from bluca/ipv6_downgrade

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Problem: zmq_bind IPv4 fallback still tries IPv6
This commit is contained in:
Pieter Hintjens 2016-04-07 17:53:48 +02:00
commit 23d08c2024
2 changed files with 17 additions and 7 deletions
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14
src/tcp_connecter.cpp
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@ -271,6 +271,20 @@ int zmq::tcp_connecter_t::open ()
// Create the socket.
s = open_socket (tcp_addr->family (), SOCK_STREAM, IPPROTO_TCP);
// IPv6 address family not supported, try automatic downgrade to IPv4.
if (s == -1 && tcp_addr->family () == AF_INET6
&& errno == EAFNOSUPPORT
&& options.ipv6) {
rc = addr->resolved.tcp_addr->resolve (
addr->address.c_str (), false, false);
if (rc != 0) {
LIBZMQ_DELETE(addr->resolved.tcp_addr);
return -1;
}
s = open_socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
}
#ifdef ZMQ_HAVE_WINDOWS
if (s == INVALID_SOCKET) {
errno = wsa_error_to_errno (WSAGetLastError ());

10
src/tcp_listener.cpp
View File

@ -178,19 +178,15 @@ int zmq::tcp_listener_t::set_address (const char *addr_)
// Create a listening socket.
s = open_socket (address.family (), SOCK_STREAM, IPPROTO_TCP);
#ifdef ZMQ_HAVE_WINDOWS
if (s == INVALID_SOCKET)
errno = wsa_error_to_errno (WSAGetLastError ());
#endif
// IPv6 address family not supported, try automatic downgrade to IPv4.
if (address.family () == AF_INET6
if (s == -1 && address.family () == AF_INET6
&& errno == EAFNOSUPPORT
&& options.ipv6) {
rc = address.resolve (addr_, true, true);
rc = address.resolve (addr_, true, false);
if (rc != 0)
return rc;
s = ::socket (address.family (), SOCK_STREAM, IPPROTO_TCP);
s = open_socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
}
#ifdef ZMQ_HAVE_WINDOWS