zebra/connected.c - quagga - Gitiles

 /*
  * Address linked list routine.
  * Copyright (C) 1997, 98 Kunihiro Ishiguro
  *
  * This file is part of GNU Zebra.
  *
  * GNU Zebra is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
  * Free Software Foundation; either version 2, or (at your option) any
  * later version.
  *
  * GNU Zebra is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  * 02111-1307, USA.
  */

 #include <zebra.h>

 #include "prefix.h"
 #include "linklist.h"
 #include "if.h"
 #include "table.h"
 #include "rib.h"
 #include "table.h"
 #include "log.h"

 #include "zebra/zserv.h"
 #include "zebra/redistribute.h"
 #include "zebra/interface.h"
 #include "zebra/connected.h"

 /* If same interface address is already exist... */
 struct connected *
 connected_check_ipv4 (struct interface *ifp, struct prefix *p)
 {
   struct connected *ifc;
   struct listnode *node;

   for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
     if (prefix_same (ifc->address, p))
       return ifc;

   return NULL;
 }

 /* Called from if_up(). */
 void
 connected_up_ipv4 (struct interface *ifp, struct connected *ifc)
 {
   struct prefix_ipv4 p;
   struct prefix_ipv4 *addr;
   struct prefix_ipv4 *dest;

   if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     return;

   addr = (struct prefix_ipv4 *) ifc->address;
   dest = (struct prefix_ipv4 *) ifc->destination;

   memset (&p, 0, sizeof (struct prefix_ipv4));
   p.family = AF_INET;
   p.prefixlen = addr->prefixlen;

   /* Point-to-point check. */
   if (CONNECTED_POINTOPOINT_HOST(ifc))
     p.prefix = dest->prefix;
   else
     p.prefix = addr->prefix;

   /* Apply mask to the network. */
   apply_mask_ipv4 (&p);

   /* In case of connected address is 0.0.0.0/0 we treat it tunnel
      address. */
   if (prefix_ipv4_any (&p))
     return;

   rib_add_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0, 0, 0);

   rib_update ();
 }

 /* Add connected IPv4 route to the interface. */
 void
 connected_add_ipv4 (struct interface *ifp, int flags, struct in_addr *addr,
 		    u_char prefixlen, struct in_addr *broad, char *label)
 {
   struct prefix_ipv4 *p;
   struct connected *ifc;
   struct connected *current;

   /* Make connected structure. */
   ifc = connected_new ();
   ifc->ifp = ifp;
   ifc->flags = flags;

   /* Allocate new connected address. */
   p = prefix_ipv4_new ();
   p->family = AF_INET;
   p->prefix = *addr;
   p->prefixlen = prefixlen;
   ifc->address = (struct prefix *) p;

   /* If there is broadcast or pointopoint address. */
   if (broad)
     {
       p = prefix_ipv4_new ();
       p->family = AF_INET;
       p->prefix = *broad;
       ifc->destination = (struct prefix *) p;

       /* validate the destination address */
       if (ifp->flags & IFF_POINTOPOINT)
         {
 	  if (IPV4_ADDR_SAME(addr,broad))
 	    zlog_warn("warning: PtP interface %s has same local and peer "
 		      "address %s, routing protocols may malfunction",
 		      ifp->name,inet_ntoa(*addr));
 	  else if ((prefixlen != IPV4_MAX_PREFIXLEN) &&
 	   	   (ipv4_network_addr(addr->s_addr,prefixlen) !=
 	   	    ipv4_network_addr(broad->s_addr,prefixlen)))
 	    {
 	      char buf[2][INET_ADDRSTRLEN];
 	      zlog_warn("warning: PtP interface %s network mismatch: local "
 	      		"%s/%d vs. peer %s, routing protocols may malfunction",
 	    		ifp->name,
 			inet_ntop (AF_INET, addr, buf[0], sizeof(buf[0])),
 			prefixlen,
 			inet_ntop (AF_INET, broad, buf[1], sizeof(buf[1])));
 	    }
         }
       else
         {
 	  if (broad->s_addr != ipv4_broadcast_addr(addr->s_addr,prefixlen))
 	    {
 	      char buf[2][INET_ADDRSTRLEN];
 	      struct in_addr bcalc;
 	      bcalc.s_addr = ipv4_broadcast_addr(addr->s_addr,prefixlen);
 	      zlog_warn("warning: interface %s broadcast addr %s/%d != "
 	       		"calculated %s, routing protocols may malfunction",
 	    		ifp->name,
 			inet_ntop (AF_INET, broad, buf[0], sizeof(buf[0])),
 			prefixlen,
 			inet_ntop (AF_INET, &bcalc, buf[1], sizeof(buf[1])));
 	    }
         }

     }
   else
     /* no broadcast or destination address was supplied */
     if ((prefixlen == IPV4_MAX_PREFIXLEN) && if_is_pointopoint(ifp))
       zlog_warn("warning: PtP interface %s with addr %s/%d needs a "
       		"peer address",ifp->name,inet_ntoa(*addr),prefixlen);

   /* Label of this address. */
   if (label)
     ifc->label = strdup (label);

   /* Check same connected route. */
   current = connected_check_ipv4 (ifp, (struct prefix *) ifc->address);
   if (current)
     {
       connected_free (ifc);
       ifc = current;
     }
   else
     {
       listnode_add (ifp->connected, ifc);
     }

   /* Update interface address information to protocol daemon. */
   if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     {
       if_subnet_add (ifp, ifc);

       SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);

       zebra_interface_address_add_update (ifp, ifc);

       if (if_is_up(ifp))
 	connected_up_ipv4 (ifp, ifc);
     }
 }

 void
 connected_down_ipv4 (struct interface *ifp, struct connected *ifc)
 {
   struct prefix_ipv4 p;
   struct prefix_ipv4 *addr;
   struct prefix_ipv4 *dest;

   if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     return;

   addr = (struct prefix_ipv4 *)ifc->address;
   dest = (struct prefix_ipv4 *)ifc->destination;

   memset (&p, 0, sizeof (struct prefix_ipv4));
   p.family = AF_INET;
   p.prefixlen = addr->prefixlen;

   /* Point-to-point check. */
   if (CONNECTED_POINTOPOINT_HOST(ifc))
     p.prefix = dest->prefix;
   else
     p.prefix = addr->prefix;

   /* Apply mask to the network. */
   apply_mask_ipv4 (&p);

   /* In case of connected address is 0.0.0.0/0 we treat it tunnel
      address. */
   if (prefix_ipv4_any (&p))
     return;

   rib_delete_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0);

   rib_update ();
 }

 /* Delete connected IPv4 route to the interface. */
 void
 connected_delete_ipv4 (struct interface *ifp, int flags, struct in_addr *addr,
 		       u_char prefixlen, struct in_addr *broad, char *label)
 {
   struct prefix_ipv4 p;
   struct connected *ifc;

   memset (&p, 0, sizeof (struct prefix_ipv4));
   p.family = AF_INET;
   p.prefix = *addr;
   p.prefixlen = prefixlen;

   ifc = connected_check_ipv4 (ifp, (struct prefix *) &p);
   if (! ifc)
     return;

   /* Update interface address information to protocol daemon. */
   if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     {
       zebra_interface_address_delete_update (ifp, ifc);

       if_subnet_delete (ifp, ifc);

       connected_down_ipv4 (ifp, ifc);

       UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
     }

   listnode_delete (ifp->connected, ifc);
   connected_free (ifc);
 }

 #ifdef HAVE_IPV6
 /* If same interface address is already exist... */
 struct connected *
 connected_check_ipv6 (struct interface *ifp, struct prefix *p)
 {
   struct connected *ifc;
   struct listnode *node;

   for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
     if (prefix_same (ifc->address, p))
       return ifc;

   return 0;
 }

 void
 connected_up_ipv6 (struct interface *ifp, struct connected *ifc)
 {
   struct prefix_ipv6 p;
   struct prefix_ipv6 *addr;
   struct prefix_ipv6 *dest;

   if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     return;

   addr = (struct prefix_ipv6 *) ifc->address;
   dest = (struct prefix_ipv6 *) ifc->destination;

   memset (&p, 0, sizeof (struct prefix_ipv6));
   p.family = AF_INET6;
   p.prefixlen = addr->prefixlen;

   if (if_is_pointopoint (ifp) && dest)
     {
       if (IN6_IS_ADDR_UNSPECIFIED (&dest->prefix))
 	p.prefix = addr->prefix;
       else
 	p.prefix = dest->prefix;
     }
   else
     p.prefix = addr->prefix;

   /* Apply mask to the network. */
   apply_mask_ipv6 (&p);

 #if ! defined (MUSICA) && ! defined (LINUX)
   /* XXX: It is already done by rib_bogus_ipv6 within rib_add_ipv6 */
   if (IN6_IS_ADDR_UNSPECIFIED (&p.prefix))
     return;
 #endif

   rib_add_ipv6 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0);

   rib_update ();
 }

 /* Add connected IPv6 route to the interface. */
 void
 connected_add_ipv6 (struct interface *ifp, struct in6_addr *addr,
 		    u_char prefixlen, struct in6_addr *broad)
 {
   struct prefix_ipv6 *p;
   struct connected *ifc;
   struct connected *current;

   /* Make connected structure. */
   ifc = connected_new ();
   ifc->ifp = ifp;

   /* Allocate new connected address. */
   p = prefix_ipv6_new ();
   p->family = AF_INET6;
   IPV6_ADDR_COPY (&p->prefix, addr);
   p->prefixlen = prefixlen;
   ifc->address = (struct prefix *) p;

   /* If there is broadcast or pointopoint address. */
   if (broad)
     {
       p = prefix_ipv6_new ();
       p->family = AF_INET6;
       IPV6_ADDR_COPY (&p->prefix, broad);
       ifc->destination = (struct prefix *) p;
     }

   current = connected_check_ipv6 (ifp, (struct prefix *) ifc->address);
   if (current)
     {
       connected_free (ifc);
       ifc = current;
     }
   else
     {
       listnode_add (ifp->connected, ifc);
     }

   /* Update interface address information to protocol daemon. */
   if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     {
       SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);

       zebra_interface_address_add_update (ifp, ifc);

       if (if_is_up(ifp))
 	connected_up_ipv6 (ifp, ifc);
     }
 }

 void
 connected_down_ipv6 (struct interface *ifp, struct connected *ifc)
 {
   struct prefix_ipv6 p;
   struct prefix_ipv6 *addr;
   struct prefix_ipv6 *dest;

   if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     return;

   addr = (struct prefix_ipv6 *) ifc->address;
   dest = (struct prefix_ipv6 *) ifc->destination;

   memset (&p, 0, sizeof (struct prefix_ipv6));
   p.family = AF_INET6;
   p.prefixlen = addr->prefixlen;

   if (if_is_pointopoint (ifp) && dest)
     {
       if (IN6_IS_ADDR_UNSPECIFIED (&dest->prefix))
 	p.prefix = addr->prefix;
       else
 	p.prefix = dest->prefix;
     }
   else
     p.prefix = addr->prefix;

   apply_mask_ipv6 (&p);

   if (IN6_IS_ADDR_UNSPECIFIED (&p.prefix))
     return;

   rib_delete_ipv6 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0);

   rib_update ();
 }

 void
 connected_delete_ipv6 (struct interface *ifp, struct in6_addr *address,
 		       u_char prefixlen, struct in6_addr *broad)
 {
   struct prefix_ipv6 p;
   struct connected *ifc;

   memset (&p, 0, sizeof (struct prefix_ipv6));
   p.family = AF_INET6;
   memcpy (&p.prefix, address, sizeof (struct in6_addr));
   p.prefixlen = prefixlen;

   ifc = connected_check_ipv6 (ifp, (struct prefix *) &p);
   if (! ifc)
     return;

   /* Update interface address information to protocol daemon. */
   if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
     {
       zebra_interface_address_delete_update (ifp, ifc);

       connected_down_ipv6 (ifp, ifc);

       UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
     }

   listnode_delete (ifp->connected, ifc);
   connected_free (ifc);
 }
 #endif /* HAVE_IPV6 */
	/*
	* Address linked list routine.
	* Copyright (C) 1997, 98 Kunihiro Ishiguro
	*
	* This file is part of GNU Zebra.
	*
	* GNU Zebra is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published by the
	* Free Software Foundation; either version 2, or (at your option) any
	* later version.
	*
	* GNU Zebra is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with GNU Zebra; see the file COPYING. If not, write to the Free
	* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	* 02111-1307, USA.
	*/

	#include <zebra.h>

	#include "prefix.h"
	#include "linklist.h"
	#include "if.h"
	#include "table.h"
	#include "rib.h"
	#include "table.h"
	#include "log.h"

	#include "zebra/zserv.h"
	#include "zebra/redistribute.h"
	#include "zebra/interface.h"
	#include "zebra/connected.h"

	/* If same interface address is already exist... */
	struct connected *
	connected_check_ipv4 (struct interface ifp, struct prefix p)
	{
	struct connected *ifc;
	struct listnode *node;

	for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
	if (prefix_same (ifc->address, p))
	return ifc;

	return NULL;
	}

	/* Called from if_up(). */
	void
	connected_up_ipv4 (struct interface ifp, struct connected ifc)
	{
	struct prefix_ipv4 p;
	struct prefix_ipv4 *addr;
	struct prefix_ipv4 *dest;

	if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	return;

	addr = (struct prefix_ipv4 *) ifc->address;
	dest = (struct prefix_ipv4 *) ifc->destination;

	memset (&p, 0, sizeof (struct prefix_ipv4));
	p.family = AF_INET;
	p.prefixlen = addr->prefixlen;

	/* Point-to-point check. */
	if (CONNECTED_POINTOPOINT_HOST(ifc))
	p.prefix = dest->prefix;
	else
	p.prefix = addr->prefix;

	/* Apply mask to the network. */
	apply_mask_ipv4 (&p);

	/* In case of connected address is 0.0.0.0/0 we treat it tunnel
	address. */
	if (prefix_ipv4_any (&p))
	return;

	rib_add_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0, 0, 0);

	rib_update ();
	}

	/* Add connected IPv4 route to the interface. */
	void
	connected_add_ipv4 (struct interface ifp, int flags, struct in_addr addr,
	u_char prefixlen, struct in_addr broad, char label)
	{
	struct prefix_ipv4 *p;
	struct connected *ifc;
	struct connected *current;

	/* Make connected structure. */
	ifc = connected_new ();
	ifc->ifp = ifp;
	ifc->flags = flags;

	/* Allocate new connected address. */
	p = prefix_ipv4_new ();
	p->family = AF_INET;
	p->prefix = *addr;
	p->prefixlen = prefixlen;
	ifc->address = (struct prefix *) p;

	/* If there is broadcast or pointopoint address. */
	if (broad)
	{
	p = prefix_ipv4_new ();
	p->family = AF_INET;
	p->prefix = *broad;
	ifc->destination = (struct prefix *) p;

	/* validate the destination address */
	if (ifp->flags & IFF_POINTOPOINT)
	{
	if (IPV4_ADDR_SAME(addr,broad))
	zlog_warn("warning: PtP interface %s has same local and peer "
	"address %s, routing protocols may malfunction",
	ifp->name,inet_ntoa(*addr));
	else if ((prefixlen != IPV4_MAX_PREFIXLEN) &&
	(ipv4_network_addr(addr->s_addr,prefixlen) !=
	ipv4_network_addr(broad->s_addr,prefixlen)))
	{
	char buf[2][INET_ADDRSTRLEN];
	zlog_warn("warning: PtP interface %s network mismatch: local "
	"%s/%d vs. peer %s, routing protocols may malfunction",
	ifp->name,
	inet_ntop (AF_INET, addr, buf[0], sizeof(buf[0])),
	prefixlen,
	inet_ntop (AF_INET, broad, buf[1], sizeof(buf[1])));
	}
	}
	else
	{
	if (broad->s_addr != ipv4_broadcast_addr(addr->s_addr,prefixlen))
	{
	char buf[2][INET_ADDRSTRLEN];
	struct in_addr bcalc;
	bcalc.s_addr = ipv4_broadcast_addr(addr->s_addr,prefixlen);
	zlog_warn("warning: interface %s broadcast addr %s/%d != "
	"calculated %s, routing protocols may malfunction",
	ifp->name,
	inet_ntop (AF_INET, broad, buf[0], sizeof(buf[0])),
	prefixlen,
	inet_ntop (AF_INET, &bcalc, buf[1], sizeof(buf[1])));
	}
	}

	}
	else
	/* no broadcast or destination address was supplied */
	if ((prefixlen == IPV4_MAX_PREFIXLEN) && if_is_pointopoint(ifp))
	zlog_warn("warning: PtP interface %s with addr %s/%d needs a "
	"peer address",ifp->name,inet_ntoa(*addr),prefixlen);

	/* Label of this address. */
	if (label)
	ifc->label = strdup (label);

	/* Check same connected route. */
	current = connected_check_ipv4 (ifp, (struct prefix *) ifc->address);
	if (current)
	{
	connected_free (ifc);
	ifc = current;
	}
	else
	{
	listnode_add (ifp->connected, ifc);
	}

	/* Update interface address information to protocol daemon. */
	if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	{
	if_subnet_add (ifp, ifc);

	SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);

	zebra_interface_address_add_update (ifp, ifc);

	if (if_is_up(ifp))
	connected_up_ipv4 (ifp, ifc);
	}
	}

	void
	connected_down_ipv4 (struct interface ifp, struct connected ifc)
	{
	struct prefix_ipv4 p;
	struct prefix_ipv4 *addr;
	struct prefix_ipv4 *dest;

	if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	return;

	addr = (struct prefix_ipv4 *)ifc->address;
	dest = (struct prefix_ipv4 *)ifc->destination;

	memset (&p, 0, sizeof (struct prefix_ipv4));
	p.family = AF_INET;
	p.prefixlen = addr->prefixlen;

	/* Point-to-point check. */
	if (CONNECTED_POINTOPOINT_HOST(ifc))
	p.prefix = dest->prefix;
	else
	p.prefix = addr->prefix;

	/* Apply mask to the network. */
	apply_mask_ipv4 (&p);

	/* In case of connected address is 0.0.0.0/0 we treat it tunnel
	address. */
	if (prefix_ipv4_any (&p))
	return;

	rib_delete_ipv4 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0);

	rib_update ();
	}

	/* Delete connected IPv4 route to the interface. */
	void
	connected_delete_ipv4 (struct interface ifp, int flags, struct in_addr addr,
	u_char prefixlen, struct in_addr broad, char label)
	{
	struct prefix_ipv4 p;
	struct connected *ifc;

	memset (&p, 0, sizeof (struct prefix_ipv4));
	p.family = AF_INET;
	p.prefix = *addr;
	p.prefixlen = prefixlen;

	ifc = connected_check_ipv4 (ifp, (struct prefix *) &p);
	if (! ifc)
	return;

	/* Update interface address information to protocol daemon. */
	if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	{
	zebra_interface_address_delete_update (ifp, ifc);

	if_subnet_delete (ifp, ifc);

	connected_down_ipv4 (ifp, ifc);

	UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
	}

	listnode_delete (ifp->connected, ifc);
	connected_free (ifc);
	}

	#ifdef HAVE_IPV6
	/* If same interface address is already exist... */
	struct connected *
	connected_check_ipv6 (struct interface ifp, struct prefix p)
	{
	struct connected *ifc;
	struct listnode *node;

	for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, ifc))
	if (prefix_same (ifc->address, p))
	return ifc;

	return 0;
	}

	void
	connected_up_ipv6 (struct interface ifp, struct connected ifc)
	{
	struct prefix_ipv6 p;
	struct prefix_ipv6 *addr;
	struct prefix_ipv6 *dest;

	if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	return;

	addr = (struct prefix_ipv6 *) ifc->address;
	dest = (struct prefix_ipv6 *) ifc->destination;

	memset (&p, 0, sizeof (struct prefix_ipv6));
	p.family = AF_INET6;
	p.prefixlen = addr->prefixlen;

	if (if_is_pointopoint (ifp) && dest)
	{
	if (IN6_IS_ADDR_UNSPECIFIED (&dest->prefix))
	p.prefix = addr->prefix;
	else
	p.prefix = dest->prefix;
	}
	else
	p.prefix = addr->prefix;

	/* Apply mask to the network. */
	apply_mask_ipv6 (&p);

	#if ! defined (MUSICA) && ! defined (LINUX)
	/* XXX: It is already done by rib_bogus_ipv6 within rib_add_ipv6 */
	if (IN6_IS_ADDR_UNSPECIFIED (&p.prefix))
	return;
	#endif

	rib_add_ipv6 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0);

	rib_update ();
	}

	/* Add connected IPv6 route to the interface. */
	void
	connected_add_ipv6 (struct interface ifp, struct in6_addr addr,
	u_char prefixlen, struct in6_addr *broad)
	{
	struct prefix_ipv6 *p;
	struct connected *ifc;
	struct connected *current;

	/* Make connected structure. */
	ifc = connected_new ();
	ifc->ifp = ifp;

	/* Allocate new connected address. */
	p = prefix_ipv6_new ();
	p->family = AF_INET6;
	IPV6_ADDR_COPY (&p->prefix, addr);
	p->prefixlen = prefixlen;
	ifc->address = (struct prefix *) p;

	/* If there is broadcast or pointopoint address. */
	if (broad)
	{
	p = prefix_ipv6_new ();
	p->family = AF_INET6;
	IPV6_ADDR_COPY (&p->prefix, broad);
	ifc->destination = (struct prefix *) p;
	}

	current = connected_check_ipv6 (ifp, (struct prefix *) ifc->address);
	if (current)
	{
	connected_free (ifc);
	ifc = current;
	}
	else
	{
	listnode_add (ifp->connected, ifc);
	}

	/* Update interface address information to protocol daemon. */
	if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	{
	SET_FLAG (ifc->conf, ZEBRA_IFC_REAL);

	zebra_interface_address_add_update (ifp, ifc);

	if (if_is_up(ifp))
	connected_up_ipv6 (ifp, ifc);
	}
	}

	void
	connected_down_ipv6 (struct interface ifp, struct connected ifc)
	{
	struct prefix_ipv6 p;
	struct prefix_ipv6 *addr;
	struct prefix_ipv6 *dest;

	if (! CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	return;

	addr = (struct prefix_ipv6 *) ifc->address;
	dest = (struct prefix_ipv6 *) ifc->destination;

	memset (&p, 0, sizeof (struct prefix_ipv6));
	p.family = AF_INET6;
	p.prefixlen = addr->prefixlen;

	if (if_is_pointopoint (ifp) && dest)
	{
	if (IN6_IS_ADDR_UNSPECIFIED (&dest->prefix))
	p.prefix = addr->prefix;
	else
	p.prefix = dest->prefix;
	}
	else
	p.prefix = addr->prefix;

	apply_mask_ipv6 (&p);

	if (IN6_IS_ADDR_UNSPECIFIED (&p.prefix))
	return;

	rib_delete_ipv6 (ZEBRA_ROUTE_CONNECT, 0, &p, NULL, ifp->ifindex, 0);

	rib_update ();
	}

	void
	connected_delete_ipv6 (struct interface ifp, struct in6_addr address,
	u_char prefixlen, struct in6_addr *broad)
	{
	struct prefix_ipv6 p;
	struct connected *ifc;

	memset (&p, 0, sizeof (struct prefix_ipv6));
	p.family = AF_INET6;
	memcpy (&p.prefix, address, sizeof (struct in6_addr));
	p.prefixlen = prefixlen;

	ifc = connected_check_ipv6 (ifp, (struct prefix *) &p);
	if (! ifc)
	return;

	/* Update interface address information to protocol daemon. */
	if (CHECK_FLAG (ifc->conf, ZEBRA_IFC_REAL))
	{
	zebra_interface_address_delete_update (ifp, ifc);

	connected_down_ipv6 (ifp, ifc);

	UNSET_FLAG (ifc->conf, ZEBRA_IFC_REAL);
	}

	listnode_delete (ifp->connected, ifc);
	connected_free (ifc);
	}
	#endif /* HAVE_IPV6 */