apparently this code path was never tested, as it's not usual to have
v6 nameservers listed on a system without v6 networking support. but
it was always intended to work.
when reverting to binding a v4 address, also revert the family in the
sockaddr structure and the socklen for it. otherwise bind will just
fail due to mismatched family/sockaddr size.
fix dns resolver fallback when v6 nameservers are listed by
}
/* Get local address and open/bind a socket */
- sa.sin.sin_family = family;
fd = socket(family, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
/* Handle case where system lacks IPv6 support */
if (fd < 0 && family == AF_INET6 && errno == EAFNOSUPPORT) {
fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
family = AF_INET;
+ sl = sizeof sa.sin;
}
+ sa.sin.sin_family = family;
if (fd < 0 || bind(fd, (void *)&sa, sl) < 0) {
if (fd >= 0) close(fd);
pthread_setcancelstate(cs, 0);