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unix: turn on SO_REUSEPORT for UDP sockets

Required on BSD-like systems for local UDP multicast. Without it, the bind()
call fails with EADDRINUSE.
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bnoordhuis committed Jan 26, 2012
1 parent b88bc43 commit 9c76d0d74218575c3898ec2e12311800c54c4adc
Showing with 8 additions and 0 deletions.
  1. +8 −0 src/unix/udp.c
@@ -340,6 +340,14 @@ static int uv__bind(uv_udp_t* handle,
goto out;
}

#ifdef SO_REUSEPORT /* Apple's version of SO_REUSEADDR... */
yes = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof yes) == -1) {
uv__set_sys_error(handle->loop, errno);
goto out;
}
#endif

if (flags & UV_UDP_IPV6ONLY) {
#ifdef IPV6_V6ONLY
yes = 1;

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