X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-core%2Fsocket.c;h=0487023dd9f68bb4106672cf1f6874fb77e5be60;hb=9aa4773acbfadbcf95aaf0063510f8be8ddcbd86;hp=497f06196acd36bd68b947351cd4e552d3f6d948;hpb=b3aeac1deb4a0aa645f144ace4c4688f4655489b;p=catta

diff --git a/avahi-core/socket.c b/avahi-core/socket.c
index 497f061..0487023 100644
--- a/avahi-core/socket.c
+++ b/avahi-core/socket.c
@@ -99,46 +99,37 @@ static void ipv6_address_to_sockaddr(struct sockaddr_in6 *ret_sa, const AvahiIPv
     memcpy(&ret_sa->sin6_addr, a, sizeof(AvahiIPv6Address));
 }
 
-int avahi_mdns_mcast_join_ipv4(int fd, int idx) {
-/*  FIXME: sebest : we must factorize this part of the code */
-    struct sockaddr_in sa;
 #ifdef HAVE_STRUCT_IP_MREQN
-    struct ip_mreqn mreq; 
- 
-    memset(&mreq, 0, sizeof(mreq));
-    mreq.imr_ifindex = idx;
+int avahi_mdns_mcast_join_ipv4(int fd, int idx, int join) {
+    struct ip_mreqn mreq;
 #else
-    struct ip_mreq mreq; 
-    struct ifreq ifreq;
-
+int avahi_mdns_mcast_join_ipv4(int fd, const AvahiAddress *a, int join) {
+    struct ip_mreq mreq;
+#endif
+        
+    struct sockaddr_in sa;
     memset(&mreq, 0, sizeof(mreq));
 
-    if ((!if_indextoname(idx, ifreq.ifr_name))) {
-      avahi_log_warn("if_indextoname failed: %s", strerror(errno));
-      return -1;
-    }
-
-    if (ioctl(fd, SIOCGIFADDR, &ifreq) < 0) {
-      avahi_log_warn("SIOCGIFADDR failed: %s", strerror(errno));
-      return -1;
-    }
-
-    memcpy(&mreq.imr_interface,
-	   &((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr,
-	   sizeof(struct in_addr));
+#ifdef HAVE_STRUCT_IP_MREQN
+    mreq.imr_ifindex = idx;
+#else
+    assert(a);
+    assert(a->proto == AVAHI_PROTO_INET);
+    mreq.imr_interface.s_addr = a->data.ipv4.address;
 #endif
-    mdns_mcast_group_ipv4 (&sa);
+    
+    mdns_mcast_group_ipv4(&sa);
     mreq.imr_multiaddr = sa.sin_addr;
 
-    if (setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
-        avahi_log_warn("IP_ADD_MEMBERSHIP failed: %s", strerror(errno));
+    if (setsockopt(fd, IPPROTO_IP, join ? IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
+        avahi_log_warn("%s failed: %s", join ? "IP_ADD_MEMBERSHIP" : "IP_DROP_MEMBERSHIP", strerror(errno));
         return -1;
     } 
 
     return 0;
 }
 
-int avahi_mdns_mcast_join_ipv6(int fd, int idx) {
+int avahi_mdns_mcast_join_ipv6(int fd, int idx, int join) {
     struct ipv6_mreq mreq6; 
     struct sockaddr_in6 sa6;
 
@@ -148,73 +139,35 @@ int avahi_mdns_mcast_join_ipv6(int fd, int idx) {
     mreq6.ipv6mr_multiaddr = sa6.sin6_addr;
     mreq6.ipv6mr_interface = idx;
 
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
-        avahi_log_warn("IPV6_ADD_MEMBERSHIP failed: %s", strerror(errno));
+    if (setsockopt(fd, IPPROTO_IPV6, join ? IPV6_ADD_MEMBERSHIP : IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
+        avahi_log_warn("%s failed: %s", join ? "IPV6_ADD_MEMBERSHIP" : "IPV6_DROP_MEMBERSHIP", strerror(errno));
         return -1;
     }
 
     return 0;
 }
 
-int avahi_mdns_mcast_leave_ipv4(int fd, int idx) {
-/*  FIXME: sebest : we must factorize this part of the code */
-    struct sockaddr_in sa;
-#ifdef HAVE_STRUCT_IP_MREQN
-    struct ip_mreqn mreq; 
- 
-    memset(&mreq, 0, sizeof(mreq));
-    mreq.imr_ifindex = idx;
-#else
-    struct ip_mreq mreq; 
-    struct ifreq ifreq;
-
-    memset(&mreq, 0, sizeof(mreq));
-
-    if ((!if_indextoname(idx, ifreq.ifr_name))) {
-      avahi_log_warn("if_indextoname failed: %s", strerror(errno));
-      return -1;
-    }
-
-    if (ioctl(fd, SIOCGIFADDR, &ifreq) < 0) {
-      avahi_log_warn("SIOCGIFADDR failed: %s", strerror(errno));
-      return -1;
-    }
-
-    memcpy(&mreq.imr_interface,
-	   &((struct sockaddr_in *) &ifreq.ifr_addr)->sin_addr,
-	   sizeof(struct in_addr));
-#endif
-    mdns_mcast_group_ipv4 (&sa);
-    mreq.imr_multiaddr = sa.sin_addr;
-
-    if (setsockopt(fd, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0) {
-        avahi_log_warn("IP_DROP_MEMBERSHIP failed: %s", strerror(errno));
+static int reuseaddr(int fd) {
+    int yes;
+    
+    yes = 1;
+    if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("SO_REUSEADDR failed: %s", strerror(errno));
         return -1;
     }
-
-    return 0;
-}
-
-int avahi_mdns_mcast_leave_ipv6(int fd, int idx) {
-    struct ipv6_mreq mreq6; 
-    struct sockaddr_in6 sa6;
-
-    mdns_mcast_group_ipv6 (&sa6);
-
-    memset(&mreq6, 0, sizeof(mreq6));
-    mreq6.ipv6mr_multiaddr = sa6.sin6_addr;
-    mreq6.ipv6mr_interface = idx;
-
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
-        avahi_log_warn("IPV6_DROP_MEMBERSHIP failed: %s", strerror(errno));
+    
+#ifdef SO_REUSEPORT
+    yes = 1;
+    if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("SO_REUSEPORT failed: %s", strerror(errno));
         return -1;
     }
-
+#endif
+    
     return 0;
 }
 
 static int bind_with_warn(int fd, const struct sockaddr *sa, socklen_t l) {
-    int yes;
     
     assert(fd >= 0);
     assert(sa);
@@ -231,12 +184,9 @@ static int bind_with_warn(int fd, const struct sockaddr *sa, socklen_t l) {
                        sa->sa_family == AF_INET ? "IPv4" : "IPv6");
 
         /* Try again, this time with SO_REUSEADDR set */
-        yes = 1;
-        if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
-            avahi_log_warn("SO_REUSEADDR failed: %s", strerror(errno));
+        if (reuseaddr(fd) < 0)
             return -1;
-        }
-
+        
         if (bind(fd, sa, l) < 0) {
             avahi_log_warn("bind() failed: %s", strerror(errno));
             return -1;
@@ -247,49 +197,103 @@ static int bind_with_warn(int fd, const struct sockaddr *sa, socklen_t l) {
          * user may run other mDNS implementations if he really
          * wants. */
         
-        yes = 1;
-        if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
-            avahi_log_warn("SO_REUSEADDR failed: %s", strerror(errno));
+        if (reuseaddr(fd) < 0)
             return -1;
-        }
     }
 
     return 0;
 }
 
-static int ip_pktinfo (int fd, int yes)
-{
-    int ret = -1;
-
+static int ipv4_pktinfo(int fd) {
+    int yes;
+    
 #ifdef IP_PKTINFO
-    if ((ret = setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &yes, sizeof(yes))) < 0) {
+    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
-    if ((ret = setsockopt (fd, IPPROTO_IP, IP_RECVINTERFACE, &yes, sizeof (yes))) < 0) {
+    yes = 1;
+    if (setsockopt (fd, IPPROTO_IP, IP_RECVINTERFACE, &yes, sizeof(yes)) < 0) {
         avahi_log_warn("IP_RECVINTERFACE failed: %s", strerror(errno));
+        return -1;
     }
-#else
-#ifdef IP_RECVIF
-    if ((ret = setsockopt (fd, IPPROTO_IP, IP_RECVIF, &yes, sizeof (yes))) < 0) {
+#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 /* IP_RECVIF */
-#endif /* IP_RECVINTERFACE */
-#if defined (IP_RECVDSTADDR) /* && !defined(solaris) */
-    if ((ret = setsockopt (fd, IPPROTO_IP, IP_RECVDSTADDR, &yes, sizeof (yes))) < 0) {
+#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 /* IP_RECVDSTADDR */
+#endif
+    
 #endif /* IP_PKTINFO */
 
-    return (ret);
+#ifdef IP_RECVTTL
+    yes = 1;
+    if (setsockopt(fd, IPPROTO_IP, IP_RECVTTL, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("IP_RECVTTL failed: %s", strerror(errno));
+        return -1;
+    }
+#endif
+
+    return 0;
+}
+
+static int ipv6_pktinfo(int fd) {
+    int yes;
+    
+#ifdef IPV6_RECVPKTINFO
+    yes = 1;
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("IPV6_RECVPKTINFO failed: %s", strerror(errno));
+        return -1;
+    }
+#elif defined(IPV6_PKTINFO)
+    yes = 1;
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_PKTINFO, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("IPV6_PKTINFO failed: %s", strerror(errno));
+        return -1;
+    }
+#endif
+
+#ifdef IPV6_RECVHOPS
+    yes = 1;
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVHOPS, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("IPV6_RECVHOPS failed: %s", strerror(errno));
+        return -1;
+    }
+#elif defined(IPV6_RECVHOPLIMIT)
+    yes = 1;
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("IPV6_RECVHOPLIMIT failed: %s", strerror(errno));
+        return -1;
+    }
+#elif defined(IPV6_HOPLIMIT)
+    yes = 1;
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_HOPLIMIT, &yes, sizeof(yes)) < 0) {
+        avahi_log_warn("IPV6_HOPLIMIT failed: %s", strerror(errno));
+        return -1;
+    }
+#endif
+
+    return 0;
 }
 
 int avahi_open_socket_ipv4(int no_reuse) {
     struct sockaddr_in local;
-    int fd = -1, ttl, yes, r;
+    int fd = -1, r, ittl;
+    uint8_t ttl, cyes;
         
     if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
         avahi_log_warn("socket() failed: %s", strerror(errno));
@@ -302,14 +306,14 @@ int avahi_open_socket_ipv4(int no_reuse) {
         goto fail;
     }
 
-    ttl = 255;
-    if (setsockopt(fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl)) < 0) {
+    ittl = 255;
+    if (setsockopt(fd, IPPROTO_IP, IP_TTL, &ittl, sizeof(ittl)) < 0) {
         avahi_log_warn("IP_TTL failed: %s", strerror(errno));
         goto fail;
     }
     
-    yes = 1;
-    if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &yes, sizeof(yes)) < 0) {
+    cyes = 1;
+    if (setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &cyes, sizeof(cyes)) < 0) {
         avahi_log_warn("IP_MULTICAST_LOOP failed: %s", strerror(errno));
         goto fail;
     }
@@ -326,16 +330,8 @@ int avahi_open_socket_ipv4(int no_reuse) {
     if (r < 0)
         goto fail;
 
-    yes = 1;
-    if (setsockopt(fd, IPPROTO_IP, IP_RECVTTL, &yes, sizeof(yes)) < 0) {
-        avahi_log_warn("IP_RECVTTL failed: %s", strerror(errno));
-        goto fail;
-    }
-
-    yes = 1;
-    if (ip_pktinfo (fd, yes) < 0) {
+    if (ipv4_pktinfo (fd) < 0)
          goto fail;
-    }
 
     if (avahi_set_cloexec(fd) < 0) {
         avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
@@ -358,7 +354,8 @@ fail:
 
 int avahi_open_socket_ipv6(int no_reuse) {
     struct sockaddr_in6 sa, local;
-    int fd = -1, ttl, yes, r;
+    int fd = -1, yes, r;
+    int ttl;
 
     mdns_mcast_group_ipv6(&sa);
         
@@ -403,17 +400,8 @@ int avahi_open_socket_ipv6(int no_reuse) {
     if (r < 0)
         goto fail;
 
-    yes = 1;
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_HOPLIMIT, &yes, sizeof(yes)) < 0) {
-        avahi_log_warn("IPV6_HOPLIMIT failed: %s", strerror(errno));
+    if (ipv6_pktinfo(fd) < 0)
         goto fail;
-    }
-
-    yes = 1;
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_PKTINFO, &yes, sizeof(yes)) < 0) {
-        avahi_log_warn("IPV6_PKTINFO failed: %s", strerror(errno));
-        goto fail;
-    }
     
     if (avahi_set_cloexec(fd) < 0) {
         avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));
@@ -459,13 +447,9 @@ int avahi_send_dns_packet_ipv4(int fd, int interface, AvahiDnsPacket *p, const A
     struct sockaddr_in sa;
     struct msghdr msg;
     struct iovec io;
-    struct cmsghdr *cmsg;
 #ifdef IP_PKTINFO
+    struct cmsghdr *cmsg;
     uint8_t cmsg_data[sizeof(struct cmsghdr) + sizeof(struct in_pktinfo)];
-#elif IP_RECVIF
-    uint8_t cmsg_data[sizeof(struct cmsghdr) + sizeof(struct sockaddr_dl)];
-#elif IP_RECVINTERFACE
-    uint8_t cmsg_data[sizeof(struct cmsghdr) + sizeof(u_short)];
 #endif
 
     assert(fd >= 0);
@@ -488,45 +472,31 @@ int avahi_send_dns_packet_ipv4(int fd, int interface, AvahiDnsPacket *p, const A
     msg.msg_iov = &io;
     msg.msg_iovlen = 1;
     msg.msg_flags = 0;
+    msg.msg_control = NULL;
+    msg.msg_controllen = 0;
 
+#ifdef IP_PKTINFO
     if (interface >= 0) {
+        struct in_pktinfo *pkti;
         
         memset(cmsg_data, 0, sizeof(cmsg_data));
         cmsg = (struct cmsghdr*) cmsg_data;
         cmsg->cmsg_len = sizeof(cmsg_data);
         cmsg->cmsg_level = IPPROTO_IP;
-#ifdef IP_PKTINFO
-	{
-	  struct in_pktinfo *pkti;
-
-	  cmsg->cmsg_type = IP_PKTINFO;
-	  pkti = (struct in_pktinfo*) (cmsg_data + sizeof(struct cmsghdr));
-	  pkti->ipi_ifindex = interface;
-	}
-#elif IP_RECVIF
-	{
-	  struct sockaddr_dl *sdl;
-
-	  cmsg->cmsg_type = IP_RECVIF;
-	  sdl = (struct sockaddr_dl*) (cmsg_data + sizeof(struct cmsghdr));
-	  sdl->sdl_index = interface;
-	}
-#elif IP_RECVINTERFACE
-	{
-	  u_short *i;
-
-	  cmsg->cmsg_type = IP_RECVINTERFACE;
-	  i = (u_short *) (cmsg_data + sizeof(struct cmsghdr));
-	  memcpy(&i, CMSG_DATA (cmsg), sizeof(u_short));
-	}
-#endif
+        cmsg->cmsg_type = IP_PKTINFO;
+
+        pkti = (struct in_pktinfo*) (cmsg_data + sizeof(struct cmsghdr));
+        pkti->ipi_ifindex = interface;
+
         msg.msg_control = cmsg_data;
         msg.msg_controllen = sizeof(cmsg_data);
-    } else {
-        msg.msg_control = NULL;
-        msg.msg_controllen = 0;
     }
-
+#else
+#ifdef __GNUC__
+#warning "FIXME: We need some code to set the outgoing interface here if IP_PKTINFO is not available"
+#endif
+#endif
+    
     return sendmsg_loop(fd, &msg, 0);
 }
 
@@ -587,7 +557,7 @@ AvahiDnsPacket* avahi_recv_dns_packet_ipv4(int fd, struct sockaddr_in *ret_sa, A
     uint8_t aux[1024];
     ssize_t l;
     struct cmsghdr *cmsg;
-    int found_ttl = 0, found_iface = 0, found_addr = 0;
+    int found_iface = 0, found_addr = 0;
     int ms;
 
     assert(fd >= 0);
@@ -633,61 +603,65 @@ AvahiDnsPacket* avahi_recv_dns_packet_ipv4(int fd, struct sockaddr_in *ret_sa, A
     p->size = (size_t) l;
 
     if (ret_ttl)
-        *ret_ttl = 0;
-
+        *ret_ttl = 255;
+    
     for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
-
+        
         if (cmsg->cmsg_level == IPPROTO_IP) {
-	  switch (cmsg->cmsg_type) {
+            switch (cmsg->cmsg_type) {
 #ifdef IP_RECVTTL
-	  case IP_RECVTTL:
+                case IP_RECVTTL:
 #endif
-	  case IP_TTL:
-	    if (ret_ttl)
-	      *ret_ttl = (uint8_t) (*(int *) CMSG_DATA(cmsg));
-	    found_ttl = 1;
-	    break;
+                case IP_TTL:
+                    if (ret_ttl)
+                        *ret_ttl = (uint8_t) (*(int *) CMSG_DATA(cmsg));
+
+                    break;
+
 #ifdef IP_PKTINFO
-	  case IP_PKTINFO:
-	    {
-	      struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);
-	      
-	      if (ret_iface)
-		*ret_iface = (int) i->ipi_ifindex;
-	      
-	      if (ret_dest_address)
-		ret_dest_address->address = i->ipi_addr.s_addr;
-	      found_addr = found_iface = 1;
-	    }
-	    break;
-#elif IP_RECVIF
-	  case IP_RECVIF:
-	    {
-	      struct sockaddr_dl *sdl = (struct sockaddr_dl *) CMSG_DATA (cmsg);
-
-	      if (ret_iface)
-		*ret_iface = (int) sdl->sdl_index;
-	      found_iface = 1;
-	    }
-	    break;
-#endif 
+                case IP_PKTINFO: {
+                    struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);
+                    
+                    if (ret_iface)
+                        *ret_iface = (int) i->ipi_ifindex;
+                    
+                    if (ret_dest_address)
+                        ret_dest_address->address = i->ipi_addr.s_addr;
+                    
+                    found_addr = found_iface = 1;
+
+                    break;
+                }
+#elif defined(IP_RECVIF)
+                case IP_RECVIF: {
+                    struct sockaddr_dl *sdl = (struct sockaddr_dl *) CMSG_DATA (cmsg);
+                    
+                    if (ret_iface)
+                        *ret_iface = (int) sdl->sdl_index;
+                    
+                    found_iface = 1;
+                    break;
+                }
+#endif
+            
 #ifdef IP_RECVDSTADDR
-	  case IP_RECVDSTADDR:
-	    if (ret_dest_address)
-	      memcpy (&ret_dest_address->address, CMSG_DATA (cmsg), 4);
-	    found_addr = 1;
-	    break;
+                case IP_RECVDSTADDR:
+                    if (ret_dest_address)
+                        memcpy(&ret_dest_address->address, CMSG_DATA (cmsg), 4);
+                    found_addr = 1;
+                    break;
+                    
 #endif
-	  default:
-	    avahi_log_warn("Unhandled cmsg_type : %d\n",cmsg->cmsg_type);
-	    break;
-	  }
+                    
+                default:
+                    avahi_log_warn("Unhandled cmsg_type : %d", cmsg->cmsg_type);
+                    break;
+            }
         }
     }
 
     assert(found_iface);
     assert(found_addr);
-    assert(found_ttl);
 
     return p;
 
@@ -705,7 +679,6 @@ AvahiDnsPacket* avahi_recv_dns_packet_ipv6(int fd, struct sockaddr_in6 *ret_sa,
     uint8_t aux[64];
     ssize_t l;
     int ms;
-    
     struct cmsghdr *cmsg;
     int found_ttl = 0, found_iface = 0;
 
@@ -763,6 +736,7 @@ AvahiDnsPacket* avahi_recv_dns_packet_ipv6(int fd, struct sockaddr_in6 *ret_sa,
 
             if (ret_dest_address)
                 memcpy(ret_dest_address->address, i->ipi6_addr.s6_addr, 16);
+            
             found_iface = 1;
         }
     }
@@ -781,7 +755,7 @@ fail:
 
 int avahi_open_unicast_socket_ipv4(void) {
     struct sockaddr_in local;
-    int fd = -1, yes;
+    int fd = -1;
         
     if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
         avahi_log_warn("socket() failed: %s", strerror(errno));
@@ -796,14 +770,7 @@ int avahi_open_unicast_socket_ipv4(void) {
         goto fail;
     }
 
-    yes = 1;
-    if (setsockopt(fd, IPPROTO_IP, IP_RECVTTL, &yes, sizeof(yes)) < 0) {
-        avahi_log_warn("IP_RECVTTL failed: %s", strerror(errno));
-        goto fail;
-    }
-
-    yes = 1;
-    if (ip_pktinfo (fd, yes) < 0) {
+    if (ipv4_pktinfo(fd) < 0) {
          goto fail;
     }
 
@@ -828,7 +795,7 @@ fail:
 
 int avahi_open_unicast_socket_ipv6(void) {
     struct sockaddr_in6 local;
-    int fd = -1, yes;
+    int fd = -1;
         
     if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
         avahi_log_warn("socket() failed: %s", strerror(errno));
@@ -843,17 +810,8 @@ int avahi_open_unicast_socket_ipv6(void) {
         goto fail;
     }
 
-    yes = 1;
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_HOPLIMIT, &yes, sizeof(yes)) < 0) {
-        avahi_log_warn("IPV6_HOPLIMIT failed: %s", strerror(errno));
+    if (ipv6_pktinfo(fd) < 0)
         goto fail;
-    }
-
-    yes = 1;
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_PKTINFO, &yes, sizeof(yes)) < 0) {
-        avahi_log_warn("IPV6_PKTINFO failed: %s", strerror(errno));
-        goto fail;
-    }
     
     if (avahi_set_cloexec(fd) < 0) {
         avahi_log_warn("FD_CLOEXEC failed: %s", strerror(errno));