From 26b490e86bc305b150200c0b08cd8e9c3bd605fb Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Mon, 22 Dec 2008 19:40:40 +0000 Subject: [PATCH] Make sure IPv6 sockets are IPv6 only. This will get rid of the "Can't bind to 0.0.0.0 port 655/tcp: Address already in use" message on Linux. --- src/net_socket.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/src/net_socket.c b/src/net_socket.c index 753229b..2ed685d 100644 --- a/src/net_socket.c +++ b/src/net_socket.c @@ -102,6 +102,11 @@ int setup_listen_socket(const sockaddr_t *sa) option = 1; setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)); +#if defined(SOL_IPV6) && defined(IPV6_V6ONLY) + if(sa->sa.sa_family == AF_INET6) + setsockopt(nfd, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option); +#endif + if(get_config_string (lookup_config(config_tree, "BindToInterface"), &iface)) { #if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE) @@ -181,6 +186,11 @@ int setup_vpn_in_socket(const sockaddr_t *sa) option = 1; setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)); +#if defined(SOL_IPV6) && defined(IPV6_V6ONLY) + if(sa->sa.sa_family == AF_INET6) + setsockopt(nfd, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option); +#endif + #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO) { bool choice; @@ -326,6 +336,12 @@ begin: goto begin; } +#if defined(SOL_IPV6) && defined(IPV6_V6ONLY) + int option = 1; + if(c->address.sa.sa_family == AF_INET6) + setsockopt(c->socket, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option); +#endif + /* Optimize TCP settings */ configure_tcp(c); -- 2.25.1