X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnet_socket.c;h=96e268fa98c8ffb3430632e613cd46f2228b2519;hb=3cb91d75f874e3398c35cd4280c1e0a1ceeedabc;hp=cd41e37b0628859a27f7f5d7071fba2fc60cb214;hpb=a9a803d5662832eb397837055a49fd94118eabf3;p=tinc

diff --git a/src/net_socket.c b/src/net_socket.c
index cd41e37b..96e268fa 100644
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -1,7 +1,7 @@
 /*
     net_socket.c -- Handle various kinds of sockets.
     Copyright (C) 1998-2005 Ivo Timmermans,
-                  2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+                  2000-2010 Guus Sliepen <guus@tinc-vpn.org>
                   2006      Scott Lamb <slamb@slamb.org>
                   2009      Florian Forster <octo@verplant.org>
 
@@ -261,9 +261,13 @@ 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 defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
 	if(sa->sa.sa_family == AF_INET6)
-		setsockopt(nfd, SOL_IPV6, IPV6_V6ONLY, &option, sizeof option);
+		setsockopt(nfd, IPPROTO_IPV6, IPV6_V6ONLY, &option, sizeof option);
+#endif
+
+#if defined(IP_DONTFRAG) && !defined(IP_DONTFRAGMENT)
+#define IP_DONTFRAGMENT IP_DONTFRAG
 #endif
 
 #if defined(SOL_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
@@ -276,6 +280,8 @@ int setup_vpn_in_socket(const sockaddr_t *sa) {
 		option = 1;
 		setsockopt(nfd, IPPROTO_IP, IP_DONTFRAGMENT, &option, sizeof(option));
 	}
+#else
+#warning No way to disable IPv4 fragmentation
 #endif
 
 #if defined(SOL_IPV6) && defined(IPV6_MTU_DISCOVER) && defined(IPV6_PMTUDISC_DO)
@@ -283,6 +289,13 @@ int setup_vpn_in_socket(const sockaddr_t *sa) {
 		option = IPV6_PMTUDISC_DO;
 		setsockopt(nfd, SOL_IPV6, IPV6_MTU_DISCOVER, &option, sizeof(option));
 	}
+#elif defined(IPPROTO_IPV6) && defined(IPV6_DONTFRAG)
+	if(myself->options & OPTION_PMTU_DISCOVERY) {
+		option = 1;
+		setsockopt(nfd, IPPROTO_IPV6, IPV6_DONTFRAG, &option, sizeof(option));
+	}
+#else
+#warning No way to disable IPv6 fragmentation
 #endif
 
 	if (!bind_to_interface(nfd)) {