zebra/ioctl_solaris.c - quagga - Gitiles

 /*
  * Common ioctl functions for Solaris.
  * 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 "linklist.h"
 #include "if.h"
 #include "prefix.h"
 #include "ioctl.h"
 #include "log.h"
 #include "privs.h"
 #include "vty.h"

 #include "zebra/rib.h"
 #include "zebra/rt.h"
 #include "zebra/interface.h"
 #include "zebra/ioctl_solaris.h"

 extern struct zebra_privs_t zserv_privs;

 /* clear and set interface name string */
 void
 lifreq_set_name (struct lifreq *lifreq, const char *ifname)
 {
   strncpy (lifreq->lifr_name, ifname, IFNAMSIZ);
 }

 /* call ioctl system call */
 int
 if_ioctl (u_long request, caddr_t buffer)
 {
   int sock;
   int ret;
   int err;

   if (zserv_privs.change(ZPRIVS_RAISE))
     zlog (NULL, LOG_ERR, "Can't raise privileges");

   sock = socket (AF_INET, SOCK_DGRAM, 0);
   if (sock < 0)
     {
       int save_errno = errno;
       if (zserv_privs.change(ZPRIVS_LOWER))
         zlog (NULL, LOG_ERR, "Can't lower privileges");
       zlog_err("Cannot create UDP socket: %s", safe_strerror(save_errno));
       exit (1);
     }

   if ((ret = ioctl (sock, request, buffer)) < 0)
     err = errno;

   if (zserv_privs.change(ZPRIVS_LOWER))
     zlog (NULL, LOG_ERR, "Can't lower privileges");

   close (sock);

   if (ret < 0)
     {
       errno = err;
       return ret;
     }
   return 0;
 }


 int
 if_ioctl_ipv6 (u_long request, caddr_t buffer)
 {
 #ifdef HAVE_IPV6
   int sock;
   int ret;
   int err;

   if (zserv_privs.change(ZPRIVS_RAISE))
     zlog (NULL, LOG_ERR, "Can't raise privileges");

   sock = socket (AF_INET6, SOCK_DGRAM, 0);
   if (sock < 0)
     {
       int save_errno = errno;
       if (zserv_privs.change(ZPRIVS_LOWER))
         zlog (NULL, LOG_ERR, "Can't lower privileges");
       zlog_err("Cannot create IPv6 datagram socket: %s",
 	       safe_strerror(save_errno));
       exit (1);
     }

   if ((ret = ioctl (sock, request, buffer)) < 0)
     err = errno;

   if (zserv_privs.change(ZPRIVS_LOWER))
     zlog (NULL, LOG_ERR, "Can't lower privileges");

   close (sock);

   if (ret < 0)
     {
       errno = err;
       return ret;
     }
 #endif /* HAVE_IPV6 */

   return 0;
 }

 /*
  * get interface metric
  *   -- if value is not avaliable set -1
  */
 void
 if_get_metric (struct interface *ifp)
 {
   struct lifreq lifreq;
   int ret;

   lifreq_set_name (&lifreq, ifp->name);

   if (ifp->flags & IFF_IPV4)
     ret = AF_IOCTL (AF_INET, SIOCGLIFMETRIC, (caddr_t) & lifreq);
 #ifdef SOLARIS_IPV6
   else if (ifp->flags & IFF_IPV6)
     ret = AF_IOCTL (AF_INET6, SIOCGLIFMETRIC, (caddr_t) & lifreq);
 #endif /* SOLARIS_IPV6 */
   else
     ret = -1;

   if (ret < 0)
     return;

   ifp->metric = lifreq.lifr_metric;

   if (ifp->metric == 0)
     ifp->metric = 1;
 }

 /* get interface MTU */
 void
 if_get_mtu (struct interface *ifp)
 {
   struct lifreq lifreq;
   int ret;
   u_char changed = 0;

   if (ifp->flags & IFF_IPV4)
     {
       lifreq_set_name (&lifreq, ifp->name);
       ret = AF_IOCTL (AF_INET, SIOCGLIFMTU, (caddr_t) & lifreq);
       if (ret < 0)
         {
           zlog_info ("Can't lookup mtu on %s by ioctl(SIOCGLIFMTU)",
                      ifp->name);
           ifp->mtu = -1;
         }
       else
         {
           ifp->mtu = lifreq.lifr_metric;
           changed = 1;
         }
     }

 #ifdef HAVE_IPV6
   if (ifp->flags & IFF_IPV6)
   {
     memset(&lifreq, 0, sizeof(lifreq));
     lifreq_set_name (&lifreq, ifp->name);

     ret = AF_IOCTL (AF_INET6, SIOCGLIFMTU, (caddr_t) & lifreq);
     if (ret < 0)
     {
       zlog_info ("Can't lookup mtu6 on %s by ioctl(SIOCGIFMTU)", ifp->name);
       ifp->mtu6 = -1;
     }
     else
     {
       ifp->mtu6 = lifreq.lifr_metric;
       changed = 1;
     }
   }
 #endif /* HAVE_IPV6 */

   if (changed)
     zebra_interface_up_update(ifp);
 }

 /* Set up interface's address, netmask (and broadcast? ).
    Solaris uses ifname:number semantics to set IP address aliases. */
 int
 if_set_prefix (struct interface *ifp, struct connected *ifc)
 {
   int ret;
   struct ifreq ifreq;
   struct sockaddr_in addr;
   struct sockaddr_in broad;
   struct sockaddr_in mask;
   struct prefix_ipv4 ifaddr;
   struct prefix_ipv4 *p;

   p = (struct prefix_ipv4 *) ifc->address;

   ifaddr = *p;

   strncpy (ifreq.ifr_name, ifp->name, IFNAMSIZ);

   addr.sin_addr = p->prefix;
   addr.sin_family = p->family;
   memcpy (&ifreq.ifr_addr, &addr, sizeof (struct sockaddr_in));

   ret = if_ioctl (SIOCSIFADDR, (caddr_t) & ifreq);

   if (ret < 0)
     return ret;

   /* We need mask for make broadcast addr. */
   masklen2ip (p->prefixlen, &mask.sin_addr);

   if (if_is_broadcast (ifp))
     {
       apply_mask_ipv4 (&ifaddr);
       addr.sin_addr = ifaddr.prefix;

       broad.sin_addr.s_addr = (addr.sin_addr.s_addr | ~mask.sin_addr.s_addr);
       broad.sin_family = p->family;

       memcpy (&ifreq.ifr_broadaddr, &broad, sizeof (struct sockaddr_in));
       ret = if_ioctl (SIOCSIFBRDADDR, (caddr_t) & ifreq);
       if (ret < 0)
         return ret;
     }

   mask.sin_family = p->family;
 #ifdef SUNOS_5
   memcpy (&mask, &ifreq.ifr_addr, sizeof (mask));
 #else
   memcpy (&ifreq.ifr_netmask, &mask, sizeof (struct sockaddr_in));
 #endif /* SUNOS_5 */
   ret = if_ioctl (SIOCSIFNETMASK, (caddr_t) & ifreq);

   return ((ret < 0) ? ret : 0);
 }

 /* Set up interface's address, netmask (and broadcast).
    Solaris uses ifname:number semantics to set IP address aliases. */
 int
 if_unset_prefix (struct interface *ifp, struct connected *ifc)
 {
   int ret;
   struct ifreq ifreq;
   struct sockaddr_in addr;
   struct prefix_ipv4 *p;

   p = (struct prefix_ipv4 *) ifc->address;

   strncpy (ifreq.ifr_name, ifp->name, IFNAMSIZ);

   memset (&addr, 0, sizeof (struct sockaddr_in));
   addr.sin_family = p->family;
   memcpy (&ifreq.ifr_addr, &addr, sizeof (struct sockaddr_in));

   ret = if_ioctl (SIOCSIFADDR, (caddr_t) & ifreq);

   if (ret < 0)
     return ret;

   return 0;
 }

 /* Get just the flags for the given name.
  * Used by the normal 'if_get_flags' function, as well
  * as the bootup interface-list code, which has to peek at per-address
  * flags in order to figure out which ones should be ignored..
  */
 int
 if_get_flags_direct (const char *ifname, uint64_t *flags, unsigned int af)
 {
   struct lifreq lifreq;
   int ret;

   lifreq_set_name (&lifreq, ifname);

   ret = AF_IOCTL (af, SIOCGLIFFLAGS, (caddr_t) &lifreq);

   if (ret)
     zlog_debug ("%s: ifname %s, error %s (%d)",
                 __func__, ifname, safe_strerror (errno), errno);

   *flags = lifreq.lifr_flags;

   return ret;
 }

 /* get interface flags */
 void
 if_get_flags (struct interface *ifp)
 {
   int ret4 = 0, ret6 = 0;
   uint64_t newflags = 0;
   uint64_t tmpflags;

   if (ifp->flags & IFF_IPV4)
     {
       ret4 = if_get_flags_direct (ifp->name, &tmpflags, AF_INET);

       if (!ret4)
         newflags |= tmpflags;
       else if (errno == ENXIO)
         {
           /* it's gone */
           UNSET_FLAG (ifp->flags, IFF_UP);
           if_flags_update (ifp, ifp->flags);
         }
     }

   if (ifp->flags & IFF_IPV6)
     {
       ret6 = if_get_flags_direct (ifp->name, &tmpflags, AF_INET6);

       if (!ret6)
         newflags |= tmpflags;
       else if (errno == ENXIO)
         {
           /* it's gone */
           UNSET_FLAG (ifp->flags, IFF_UP);
           if_flags_update (ifp, ifp->flags);
         }
     }

   /* only update flags if one of above succeeded */
   if ( !(ret4 && ret6) )
     if_flags_update (ifp, newflags);
 }

 /* Set interface flags */
 int
 if_set_flags (struct interface *ifp, uint64_t flags)
 {
   int ret;
   struct lifreq lifreq;

   lifreq_set_name (&lifreq, ifp->name);

   lifreq.lifr_flags = ifp->flags;
   lifreq.lifr_flags |= flags;

   if (ifp->flags & IFF_IPV4)
     ret = AF_IOCTL (AF_INET, SIOCSLIFFLAGS, (caddr_t) & lifreq);
   else if (ifp->flags & IFF_IPV6)
     ret = AF_IOCTL (AF_INET6, SIOCSLIFFLAGS, (caddr_t) & lifreq);
   else
     ret = -1;

   if (ret < 0)
     zlog_info ("can't set interface flags on %s: %s", ifp->name,
                safe_strerror (errno));
   else
     ret = 0;

   return ret;
 }

 /* Unset interface's flag. */
 int
 if_unset_flags (struct interface *ifp, uint64_t flags)
 {
   int ret;
   struct lifreq lifreq;

   lifreq_set_name (&lifreq, ifp->name);

   lifreq.lifr_flags = ifp->flags;
   lifreq.lifr_flags &= ~flags;

   if (ifp->flags & IFF_IPV4)
     ret = AF_IOCTL (AF_INET, SIOCSLIFFLAGS, (caddr_t) & lifreq);
   else if (ifp->flags & IFF_IPV6)
     ret = AF_IOCTL (AF_INET6, SIOCSLIFFLAGS, (caddr_t) & lifreq);
   else
     ret = -1;

   if (ret < 0)
     zlog_info ("can't unset interface flags");
   else
     ret = 0;

   return ret;
 }

 #ifdef HAVE_IPV6

 /* Interface's address add/delete functions. */
 int
 if_prefix_add_ipv6 (struct interface *ifp, struct connected *ifc)
 {
   char addrbuf[PREFIX_STRLEN];

   zlog_warn ("Can't set %s on interface %s",
              prefix2str(ifc->address, addrbuf, sizeof(addrbuf)),
              ifp->name);

   return 0;

 }

 int
 if_prefix_delete_ipv6 (struct interface *ifp, struct connected *ifc)
 {
   char addrbuf[PREFIX_STRLEN];

   zlog_warn ("Can't delete %s on interface %s",
              prefix2str(ifc->address, addrbuf, sizeof(addrbuf)),
              ifp->name);

   return 0;

 }

 #endif /* HAVE_IPV6 */
	/*
	* Common ioctl functions for Solaris.
	* 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 "linklist.h"
	#include "if.h"
	#include "prefix.h"
	#include "ioctl.h"
	#include "log.h"
	#include "privs.h"
	#include "vty.h"

	#include "zebra/rib.h"
	#include "zebra/rt.h"
	#include "zebra/interface.h"
	#include "zebra/ioctl_solaris.h"

	extern struct zebra_privs_t zserv_privs;

	/* clear and set interface name string */
	void
	lifreq_set_name (struct lifreq lifreq, const char ifname)
	{
	strncpy (lifreq->lifr_name, ifname, IFNAMSIZ);
	}

	/* call ioctl system call */
	int
	if_ioctl (u_long request, caddr_t buffer)
	{
	int sock;
	int ret;
	int err;

	if (zserv_privs.change(ZPRIVS_RAISE))
	zlog (NULL, LOG_ERR, "Can't raise privileges");

	sock = socket (AF_INET, SOCK_DGRAM, 0);
	if (sock < 0)
	{
	int save_errno = errno;
	if (zserv_privs.change(ZPRIVS_LOWER))
	zlog (NULL, LOG_ERR, "Can't lower privileges");
	zlog_err("Cannot create UDP socket: %s", safe_strerror(save_errno));
	exit (1);
	}

	if ((ret = ioctl (sock, request, buffer)) < 0)
	err = errno;

	if (zserv_privs.change(ZPRIVS_LOWER))
	zlog (NULL, LOG_ERR, "Can't lower privileges");

	close (sock);

	if (ret < 0)
	{
	errno = err;
	return ret;
	}
	return 0;
	}


	int
	if_ioctl_ipv6 (u_long request, caddr_t buffer)
	{
	#ifdef HAVE_IPV6
	int sock;
	int ret;
	int err;

	if (zserv_privs.change(ZPRIVS_RAISE))
	zlog (NULL, LOG_ERR, "Can't raise privileges");

	sock = socket (AF_INET6, SOCK_DGRAM, 0);
	if (sock < 0)
	{
	int save_errno = errno;
	if (zserv_privs.change(ZPRIVS_LOWER))
	zlog (NULL, LOG_ERR, "Can't lower privileges");
	zlog_err("Cannot create IPv6 datagram socket: %s",
	safe_strerror(save_errno));
	exit (1);
	}

	if ((ret = ioctl (sock, request, buffer)) < 0)
	err = errno;

	if (zserv_privs.change(ZPRIVS_LOWER))
	zlog (NULL, LOG_ERR, "Can't lower privileges");

	close (sock);

	if (ret < 0)
	{
	errno = err;
	return ret;
	}
	#endif /* HAVE_IPV6 */

	return 0;
	}

	/*
	* get interface metric
	* -- if value is not avaliable set -1
	*/
	void
	if_get_metric (struct interface *ifp)
	{
	struct lifreq lifreq;
	int ret;

	lifreq_set_name (&lifreq, ifp->name);

	if (ifp->flags & IFF_IPV4)
	ret = AF_IOCTL (AF_INET, SIOCGLIFMETRIC, (caddr_t) & lifreq);
	#ifdef SOLARIS_IPV6
	else if (ifp->flags & IFF_IPV6)
	ret = AF_IOCTL (AF_INET6, SIOCGLIFMETRIC, (caddr_t) & lifreq);
	#endif /* SOLARIS_IPV6 */
	else
	ret = -1;

	if (ret < 0)
	return;

	ifp->metric = lifreq.lifr_metric;

	if (ifp->metric == 0)
	ifp->metric = 1;
	}

	/* get interface MTU */
	void
	if_get_mtu (struct interface *ifp)
	{
	struct lifreq lifreq;
	int ret;
	u_char changed = 0;

	if (ifp->flags & IFF_IPV4)
	{
	lifreq_set_name (&lifreq, ifp->name);
	ret = AF_IOCTL (AF_INET, SIOCGLIFMTU, (caddr_t) & lifreq);
	if (ret < 0)
	{
	zlog_info ("Can't lookup mtu on %s by ioctl(SIOCGLIFMTU)",
	ifp->name);
	ifp->mtu = -1;
	}
	else
	{
	ifp->mtu = lifreq.lifr_metric;
	changed = 1;
	}
	}

	#ifdef HAVE_IPV6
	if (ifp->flags & IFF_IPV6)
	{
	memset(&lifreq, 0, sizeof(lifreq));
	lifreq_set_name (&lifreq, ifp->name);

	ret = AF_IOCTL (AF_INET6, SIOCGLIFMTU, (caddr_t) & lifreq);
	if (ret < 0)
	{
	zlog_info ("Can't lookup mtu6 on %s by ioctl(SIOCGIFMTU)", ifp->name);
	ifp->mtu6 = -1;
	}
	else
	{
	ifp->mtu6 = lifreq.lifr_metric;
	changed = 1;
	}
	}
	#endif /* HAVE_IPV6 */

	if (changed)
	zebra_interface_up_update(ifp);
	}

	/* Set up interface's address, netmask (and broadcast? ).
	Solaris uses ifname:number semantics to set IP address aliases. */
	int
	if_set_prefix (struct interface ifp, struct connected ifc)
	{
	int ret;
	struct ifreq ifreq;
	struct sockaddr_in addr;
	struct sockaddr_in broad;
	struct sockaddr_in mask;
	struct prefix_ipv4 ifaddr;
	struct prefix_ipv4 *p;

	p = (struct prefix_ipv4 *) ifc->address;

	ifaddr = *p;

	strncpy (ifreq.ifr_name, ifp->name, IFNAMSIZ);

	addr.sin_addr = p->prefix;
	addr.sin_family = p->family;
	memcpy (&ifreq.ifr_addr, &addr, sizeof (struct sockaddr_in));

	ret = if_ioctl (SIOCSIFADDR, (caddr_t) & ifreq);

	if (ret < 0)
	return ret;

	/* We need mask for make broadcast addr. */
	masklen2ip (p->prefixlen, &mask.sin_addr);

	if (if_is_broadcast (ifp))
	{
	apply_mask_ipv4 (&ifaddr);
	addr.sin_addr = ifaddr.prefix;

	broad.sin_addr.s_addr = (addr.sin_addr.s_addr \| ~mask.sin_addr.s_addr);
	broad.sin_family = p->family;

	memcpy (&ifreq.ifr_broadaddr, &broad, sizeof (struct sockaddr_in));
	ret = if_ioctl (SIOCSIFBRDADDR, (caddr_t) & ifreq);
	if (ret < 0)
	return ret;
	}

	mask.sin_family = p->family;
	#ifdef SUNOS_5
	memcpy (&mask, &ifreq.ifr_addr, sizeof (mask));
	#else
	memcpy (&ifreq.ifr_netmask, &mask, sizeof (struct sockaddr_in));
	#endif /* SUNOS_5 */
	ret = if_ioctl (SIOCSIFNETMASK, (caddr_t) & ifreq);

	return ((ret < 0) ? ret : 0);
	}

	/* Set up interface's address, netmask (and broadcast).
	Solaris uses ifname:number semantics to set IP address aliases. */
	int
	if_unset_prefix (struct interface ifp, struct connected ifc)
	{
	int ret;
	struct ifreq ifreq;
	struct sockaddr_in addr;
	struct prefix_ipv4 *p;

	p = (struct prefix_ipv4 *) ifc->address;

	strncpy (ifreq.ifr_name, ifp->name, IFNAMSIZ);

	memset (&addr, 0, sizeof (struct sockaddr_in));
	addr.sin_family = p->family;
	memcpy (&ifreq.ifr_addr, &addr, sizeof (struct sockaddr_in));

	ret = if_ioctl (SIOCSIFADDR, (caddr_t) & ifreq);

	if (ret < 0)
	return ret;

	return 0;
	}

	/* Get just the flags for the given name.
	* Used by the normal 'if_get_flags' function, as well
	* as the bootup interface-list code, which has to peek at per-address
	* flags in order to figure out which ones should be ignored..
	*/
	int
	if_get_flags_direct (const char ifname, uint64_t flags, unsigned int af)
	{
	struct lifreq lifreq;
	int ret;

	lifreq_set_name (&lifreq, ifname);

	ret = AF_IOCTL (af, SIOCGLIFFLAGS, (caddr_t) &lifreq);

	if (ret)
	zlog_debug ("%s: ifname %s, error %s (%d)",
	__func__, ifname, safe_strerror (errno), errno);

	*flags = lifreq.lifr_flags;

	return ret;
	}

	/* get interface flags */
	void
	if_get_flags (struct interface *ifp)
	{
	int ret4 = 0, ret6 = 0;
	uint64_t newflags = 0;
	uint64_t tmpflags;

	if (ifp->flags & IFF_IPV4)
	{
	ret4 = if_get_flags_direct (ifp->name, &tmpflags, AF_INET);

	if (!ret4)
	newflags \|= tmpflags;
	else if (errno == ENXIO)
	{
	/* it's gone */
	UNSET_FLAG (ifp->flags, IFF_UP);
	if_flags_update (ifp, ifp->flags);
	}
	}

	if (ifp->flags & IFF_IPV6)
	{
	ret6 = if_get_flags_direct (ifp->name, &tmpflags, AF_INET6);

	if (!ret6)
	newflags \|= tmpflags;
	else if (errno == ENXIO)
	{
	/* it's gone */
	UNSET_FLAG (ifp->flags, IFF_UP);
	if_flags_update (ifp, ifp->flags);
	}
	}

	/* only update flags if one of above succeeded */
	if ( !(ret4 && ret6) )
	if_flags_update (ifp, newflags);
	}

	/* Set interface flags */
	int
	if_set_flags (struct interface *ifp, uint64_t flags)
	{
	int ret;
	struct lifreq lifreq;

	lifreq_set_name (&lifreq, ifp->name);

	lifreq.lifr_flags = ifp->flags;
	lifreq.lifr_flags \|= flags;

	if (ifp->flags & IFF_IPV4)
	ret = AF_IOCTL (AF_INET, SIOCSLIFFLAGS, (caddr_t) & lifreq);
	else if (ifp->flags & IFF_IPV6)
	ret = AF_IOCTL (AF_INET6, SIOCSLIFFLAGS, (caddr_t) & lifreq);
	else
	ret = -1;

	if (ret < 0)
	zlog_info ("can't set interface flags on %s: %s", ifp->name,
	safe_strerror (errno));
	else
	ret = 0;

	return ret;
	}

	/* Unset interface's flag. */
	int
	if_unset_flags (struct interface *ifp, uint64_t flags)
	{
	int ret;
	struct lifreq lifreq;

	lifreq_set_name (&lifreq, ifp->name);

	lifreq.lifr_flags = ifp->flags;
	lifreq.lifr_flags &= ~flags;

	if (ifp->flags & IFF_IPV4)
	ret = AF_IOCTL (AF_INET, SIOCSLIFFLAGS, (caddr_t) & lifreq);
	else if (ifp->flags & IFF_IPV6)
	ret = AF_IOCTL (AF_INET6, SIOCSLIFFLAGS, (caddr_t) & lifreq);
	else
	ret = -1;

	if (ret < 0)
	zlog_info ("can't unset interface flags");
	else
	ret = 0;

	return ret;
	}

	#ifdef HAVE_IPV6

	/* Interface's address add/delete functions. */
	int
	if_prefix_add_ipv6 (struct interface ifp, struct connected ifc)
	{
	char addrbuf[PREFIX_STRLEN];

	zlog_warn ("Can't set %s on interface %s",
	prefix2str(ifc->address, addrbuf, sizeof(addrbuf)),
	ifp->name);

	return 0;

	}

	int
	if_prefix_delete_ipv6 (struct interface ifp, struct connected ifc)
	{
	char addrbuf[PREFIX_STRLEN];

	zlog_warn ("Can't delete %s on interface %s",
	prefix2str(ifc->address, addrbuf, sizeof(addrbuf)),
	ifp->name);

	return 0;

	}

	#endif /* HAVE_IPV6 */