-int avahi_mdns_mcast_leave_ipv6 (int index, int fd) {
- struct ipv6_mreq mreq6;
- struct sockaddr_in6 sa6;
+static int ipv4_pktinfo(int fd) {
+ int yes;
+
+#ifdef IP_PKTINFO
+ yes = 1;
+ if (setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &yes, sizeof(yes)) < 0) {
+ avahi_log_warn("IP_PKTINFO failed: %s", strerror(errno));
+ return -1;
+ }
+#else
+
+#ifdef IP_RECVINTERFACE
+ yes = 1;
+ if (setsockopt (fd, IPPROTO_IP, IP_RECVINTERFACE, &yes, sizeof(yes)) < 0) {
+ avahi_log_warn("IP_RECVINTERFACE failed: %s", strerror(errno));
+ return -1;
+ }
+#elif defined(IP_RECVIF)
+ yes = 1;
+ if (setsockopt (fd, IPPROTO_IP, IP_RECVIF, &yes, sizeof(yes)) < 0) {
+ avahi_log_warn("IP_RECVIF failed: %s", strerror(errno));
+ return -1;
+ }
+#endif
+
+#ifdef IP_RECVDSTADDR
+ yes = 1;
+ if (setsockopt (fd, IPPROTO_IP, IP_RECVDSTADDR, &yes, sizeof(yes)) < 0) {
+ avahi_log_warn("IP_RECVDSTADDR failed: %s", strerror(errno));
+ return -1;
+ }
+#endif
+
+#endif /* IP_PKTINFO */