-bool setup_listen_socket(meshlink_handle_t *mesh, int nfd, int sa_family) {
-#ifdef FD_CLOEXEC
- fcntl(nfd, F_SETFD, FD_CLOEXEC);
-#endif
-
- int option = 1;
- setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option));
-
-#if defined(IPV6_V6ONLY)
-
- if(sa_family == AF_INET6) {
- setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, (void *)&option, sizeof(option));
- }
-
-#else
-#warning IPV6_V6ONLY not defined
-#endif
-
- if(listen(nfd, 3)) {
- logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "listen", sockstrerror(sockerrno));
- return false;
- }
-
- return true;
-}
-
-bool setup_vpn_in_socket(meshlink_handle_t *mesh, int nfd, int sa_family) {
-#ifdef FD_CLOEXEC
- fcntl(nfd, F_SETFD, FD_CLOEXEC);
-#endif
-
-#ifdef O_NONBLOCK
- {
- int flags = fcntl(nfd, F_GETFL);
-
- if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) {
- closesocket(nfd);
- logger(mesh, MESHLINK_ERROR, "System call `%s' failed: %s", "fcntl",
- strerror(errno));
- return false;
- }
- }
-#elif defined(WIN32)
- {
- unsigned long arg = 1;
-
- if(ioctlsocket(nfd, FIONBIO, &arg) != 0) {
- closesocket(nfd);
- logger(mesh, MESHLINK_ERROR, "Call to `%s' failed: %s", "ioctlsocket", sockstrerror(sockerrno));
- return false;
- }
- }
-#endif
-
- int 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_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
-
- return true;
-} /* int setup_vpn_in_socket */
-