su_localinfo(): do not include interfaces that are down in the list.

darcs-hash:20060817173902-65a35-b78d5c30d1c2c0fa9e181125d7cbb1bdaab7a92c.gz

libsofia-sip-ua/su/sofia-sip/su_localinfo.h

@@ -67,6 +67,8 @@ enum {
   LI_NAMEREQD     = 6,
   /** Instead of domain name, use numeric form */
   LI_NUMERIC      = 8,
+  /** Interfaces are down. New in 1.12.2. */
+  LI_DOWN         = 16,
   /** Get interface name */
   LI_IFNAME       = 256
 };

libsofia-sip-ua/su/su_localinfo.c

@@ -585,9 +585,10 @@ int localinfo4(su_localinfo_t const *hints, su_localinfo_t **rresult)
       error = ELI_SYSTEM;
       goto err;
     }
-    /* Do not include interfaces that are down */
-    if ((ifreq->ifr_flags & IFF_UP) == 0) {
-      SU_DEBUG_9(("su_localinfo: if %s with index %d is down\n", if_name, if_index));
+    /* Do not include interfaces that are down unless explicitly asked */
+    if ((ifreq->ifr_flags & IFF_UP) == 0 && (hints->li_flags & LI_DOWN) == 0) {
+      SU_DEBUG_9(("su_localinfo: if %s with index %d is down\n", 
+		  if_name, if_index));
       continue;
     }
 #else
@@ -1041,6 +1042,10 @@ int bsd_localinfo(su_localinfo_t const hints[1],
     char const *ifname = 0;
     size_t ifnamelen = 0;
 
+    /* no ip address from if that is down */
+    if ((ifa->ifa_flags & IFF_UP) == 0 && (hints->li_flags & LI_DOWN) == 0)
+      continue;
+
     su = (su_sockaddr_t *)ifa->ifa_addr;
 
     if (!su)