socket: Support IPv6-less systems with runtime check.

[elogind.git] / src / socket.c

diff --git a/src/socket.c b/src/socket.c
index da85ca7e8b96bc658865ae2ee60446b729c824d4..aacf9bed9f1f50f106db3cd78b322461fc689ef8 100644 (file)
--- 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));
                 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");
 
                 if (r < 0 && x < 0)
                         log_warning("IP_TTL/IPV6_UNICAST_HOPS failed: %m");