+ option = 1;
+ setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
+ setsockopt(nfd, SOL_SOCKET, SO_BROADCAST, (void *)&option, sizeof(option));
+
+#if defined(IPV6_V6ONLY)
+
+ if(sa->sa.sa_family == AF_INET6) {
+ setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&option, sizeof(option));
+ }
+
+#endif
+
+#if defined(IP_DONTFRAG) && !defined(IP_DONTFRAGMENT)
+#define IP_DONTFRAGMENT IP_DONTFRAG
+#endif
+
+#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
+ option = IP_PMTUDISC_DO;
+ setsockopt(nfd, IPPROTO_IP, IP_MTU_DISCOVER, (void *)&option, sizeof(option));
+#elif defined(IP_DONTFRAGMENT)
+ option = 1;
+ setsockopt(nfd, IPPROTO_IP, IP_DONTFRAGMENT, (void *)&option, sizeof(option));
+#endif
+
+#if defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
+ option = IPV6_PMTUDISC_DO;
+ setsockopt(nfd, IPPROTO_IPV6, IPV6_MTU_DISCOVER, (void *)&option, sizeof(option));
+#elif defined(IPV6_DONTFRAG)
+ option = 1;
+ setsockopt(nfd, IPPROTO_IPV6, IPV6_DONTFRAG, (void *)&option, sizeof(option));
+#endif
+
+ if(bind(nfd, &sa->sa, SALEN(sa->sa))) {
+ closesocket(nfd);
+ addrstr = sockaddr2hostname(sa);
+ logger(mesh, MESHLINK_ERROR, "Can't bind to %s/udp: %s", addrstr, sockstrerror(sockerrno));
+ free(addrstr);
+ return -1;
+ }
+
+ return nfd;
+} /* int setup_vpn_in_socket */
+
+static void retry_outgoing_handler(event_loop_t *loop, void *data) {
+ assert(data);
+
+ meshlink_handle_t *mesh = loop->data;
+ outgoing_t *outgoing = data;
+ setup_outgoing_connection(mesh, outgoing);
+}
+
+void retry_outgoing(meshlink_handle_t *mesh, outgoing_t *outgoing) {
+ outgoing->timeout += 5;
+
+ if(outgoing->timeout > mesh->maxtimeout) {
+ outgoing->timeout = mesh->maxtimeout;
+ }
+
+ timeout_add(&mesh->loop, &outgoing->ev, retry_outgoing_handler, outgoing, &(struct timeval) {
+ outgoing->timeout, rand() % 100000
+ });
+
+ logger(mesh, MESHLINK_INFO, "Trying to re-establish outgoing connection in %d seconds", outgoing->timeout);