1 files changed, 118 insertions, 21 deletions

diff --git a/lib/if.c b/lib/if.c
index bbf22ab1..f003754a 100644
--- a/lib/if.c
+++ b/lib/if.c
@@ -189,11 +189,13 @@ if_lookup_address (struct in_addr src)
   listnode node;
   struct prefix addr;
   struct prefix best;
+  struct prefix peer;
   listnode cnode;
   struct interface *ifp;
   struct prefix *p;
   struct connected *c;
   struct interface *match;
+  int prefixlen;
 
   /* Zero structures - get rid of rubbish from stack */
   memset(&addr, 0, sizeof(addr));
@@ -212,34 +214,24 @@ if_lookup_address (struct in_addr src)
       for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
 	{
 	  c = getdata (cnode);
+	  p = c->address;
 
-	  if (if_is_pointopoint (ifp))
+	  if (p->family == AF_INET)
 	    {
-	      p = c->address;
+	      prefixlen = p->prefixlen;
 
-	      if (p && p->family == AF_INET)
+	      if (if_is_pointopoint (ifp) ||
+		  prefixlen >= IPV4_MAX_PREFIXLEN - 1)
 		{
-#ifdef OLD_RIB	 /* PTP  links are conventionally identified 
-		     by the address of the far end - MAG */
-		  if (IPV4_ADDR_SAME (&p->u.prefix4, &src))
-		    return ifp;
-#endif
-		  p = c->destination;
-		  if (p && IPV4_ADDR_SAME (&p->u.prefix4, &src))
-		    return ifp;
+		  peer = *c->destination;
+		  peer.prefixlen = prefixlen;
+		  p = &peer;
 		}
-	    }
-	  else
-	    {
-	      p = c->address;
 
-	      if (p->family == AF_INET)
+	      if (prefix_match (p, &addr) && prefixlen > best.prefixlen)
 		{
-		  if (prefix_match (p, &addr) && p->prefixlen > best.prefixlen)
-		    {
-		      best = *p;
-		      match = ifp;
-		    }
+		  best = *p;
+		  match = ifp;
 		}
 	    }
 	}
@@ -270,6 +262,22 @@ if_is_up (struct interface *ifp)
   return ifp->flags & IFF_UP;
 }
 
+/* Is interface running? */
+int
+if_is_running (struct interface *ifp)
+{
+  return ifp->flags & IFF_RUNNING;
+}
+
+/* Is the interface operative, eg. either UP & RUNNING
+   or UP & !ZEBRA_INTERFACE_LINK_DETECTION */
+int
+if_is_operative (struct interface *ifp)
+{
+  return ((ifp->flags & IFF_UP) &&
+	  (ifp->flags & IFF_RUNNING || !CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_LINKDETECTION)));
+}
+
 /* Is this loopback interface ? */
 int
 if_is_loopback (struct interface *ifp)
@@ -432,6 +440,36 @@ DEFUN (interface,
   return CMD_SUCCESS;
 }
 
+DEFUN_NOSH (no_interface,
+           no_interface_cmd,
+           "no interface IFNAME",
+           NO_STR
+           "Delete a pseudo interface's configuration\n"
+           "Interface's name\n")
+{
+  // deleting interface
+  struct interface *ifp;
+
+  ifp = if_lookup_by_name (argv[0]);
+
+  if (ifp == NULL)
+  {
+    vty_out (vty, "%% Inteface %s does not exist%s", argv[0], VTY_NEWLINE);
+    return CMD_WARNING;
+  }
+
+  if (CHECK_FLAG (ifp->status, ZEBRA_INTERFACE_ACTIVE)) 
+  {
+    vty_out (vty, "%% Only inactive interfaces can be deleted%s",
+            VTY_NEWLINE);
+    return CMD_WARNING;
+  }
+
+  if_delete(ifp);
+
+  return CMD_SUCCESS;
+}
+
 /* For debug purpose. */
 DEFUN (show_address,
        show_address_cmd,
@@ -553,6 +591,65 @@ connected_delete_by_prefix (struct interface *ifp, struct prefix *p)
   return NULL;
 }
 
+/* Find the IPv4 address on our side that will be used when packets
+   are sent to dst. */
+struct connected *
+connected_lookup_address (struct interface *ifp, struct in_addr dst)
+{
+  struct prefix addr;
+  struct prefix best;
+  listnode cnode;
+  struct prefix *p;
+  struct connected *c;
+  struct connected *match;
+
+  /* Zero structures - get rid of rubbish from stack */
+  memset(&addr, 0, sizeof(addr));
+  memset(&best, 0, sizeof(best));
+
+  addr.family = AF_INET;
+  addr.u.prefix4 = dst;
+  addr.prefixlen = IPV4_MAX_BITLEN;
+
+  match = NULL;
+
+  for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
+    {
+      c = getdata (cnode);
+
+      if (if_is_pointopoint (ifp))
+	{
+	  p = c->address;
+
+	  if (p && p->family == AF_INET)
+	    {
+#ifdef OLD_RIB	 /* PTP  links are conventionally identified 
+		    by the address of the far end - MAG */
+	      if (IPV4_ADDR_SAME (&p->u.prefix4, &dst))
+		return c;
+#endif
+	      p = c->destination;
+	      if (p && IPV4_ADDR_SAME (&p->u.prefix4, &dst))
+		return c;
+	    }
+	}
+      else
+	{
+	  p = c->address;
+
+	  if (p->family == AF_INET)
+	    {
+	      if (prefix_match (p, &addr) && p->prefixlen > best.prefixlen)
+		{
+		  best = *p;
+		  match = c;
+		}
+	    }
+	}
+    }
+  return match;
+}
+
 /* Check the connected information is PtP style or not.  */
 int
 ifc_pointopoint (struct connected *ifc)