Provide support for SO_REUSEPORT through LEV_OPT_REUSABLE_PORT

1 files changed, 14 insertions, 0 deletions

diff --git a/evutil.c b/evutil.c
index df93e67f..3d72e403 100644
--- a/evutil.c
+++ b/evutil.c
@@ -368,6 +368,20 @@ evutil_make_listen_socket_reuseable(evutil_socket_t sock)
 }
 
 int
+evutil_make_listen_socket_reuseable_port(evutil_socket_t sock)
+{
+#if defined __linux__ && defined(SO_REUSEPORT)
+	int one = 1;
+	/* REUSEPORT on Linux 3.9+ means, "Multiple servers (processes or
+	 * threads) can bind to the same port if they each set the option. */
+	return setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, (void*) &one,
+	    (ev_socklen_t)sizeof(one));
+#else
+	return 0;
+#endif
+}
+
+int
 evutil_make_tcp_listen_socket_deferred(evutil_socket_t sock)
 {
 #if defined(EVENT__HAVE_NETINET_TCP_H) && defined(TCP_DEFER_ACCEPT)