Set IP_FREEBIND on socket before bind to allow start before the network is fully up

src/common/net.c

@@ -28,6 +28,7 @@
 #ifdef HAVE_NETINET_IN_SYSTM_H
 #include <netinet/in_systm.h>
 #endif
+#include <netinet/in.h>
 #include <sys/stat.h>
 #include <assert.h>
 
@@ -82,6 +83,11 @@ int net_bound_socket(int type, const struct sockaddr_storage *ss)
 		                  &flag, sizeof(flag));
 	}
 
+	/* Allow bind to non-local address (Linux) */
+#ifdef IP_FREEBIND
+	(void) setsockopt(socket, IPPROTO_IP, IP_FREEBIND, &flag, sizeof(flag));
+#endif
+
 	/* Bind to specified address. */
 	const struct sockaddr *sa = (const struct sockaddr *)ss;
 	int ret = bind(socket, sa, sockaddr_len(sa));