X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fsocket.c;h=aacf9bed9f1f50f106db3cd78b322461fc689ef8;hb=0b5d26f95dd0aceb051f334c109a90e356b38c90;hp=da85ca7e8b96bc658865ae2ee60446b729c824d4;hpb=83a95334c9e1841595f5eef20938dbd0e1ad7f76;p=elogind.git

diff --git a/src/socket.c b/src/socket.c
index da85ca7e8..aacf9bed9 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -634,7 +634,13 @@ static void socket_apply_socket_options(Socket *s, int fd) {
                 int r, x;
 
                 r = setsockopt(fd, IPPROTO_IP, IP_TTL, &s->ip_ttl, sizeof(s->ip_ttl));
-                x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
+
+                if (socket_ipv6_is_supported())
+                        x = setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &s->ip_ttl, sizeof(s->ip_ttl));
+                else {
+                        x = -1;
+                        errno = EAFNOSUPPORT;
+                }
 
                 if (r < 0 && x < 0)
                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");