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.
joyent · Jan 26, 2012 · 9c76d0d · 9c76d0d
1 parent b88bc43
commit 9c76d0d
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/unix/udp.c b/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;