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/* zebra client
Copyright (C) 1997, 98, 99 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 "command.h"
#include "stream.h"
#include "network.h"
#include "prefix.h"
#include "log.h"
#include "sockunion.h"
#include "zclient.h"
#include "routemap.h"
#include "thread.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_nexthop.h"
#include "bgpd/bgp_zebra.h"
#include "bgpd/bgp_fsm.h"
/* All information about zebra. */
static struct zclient *zclient = NULL;
struct in_addr router_id_zebra;
/* Router-id update message from zebra. */
int
bgp_router_id_update (int command, struct zclient *zclient, zebra_size_t length)
{
struct prefix router_id;
struct listnode *nn;
struct bgp *bgp;
zebra_router_id_update_read(zclient->ibuf,&router_id);
router_id_zebra = router_id.u.prefix4;
LIST_LOOP (bm->bgp, bgp, nn)
{
if (!bgp->router_id_static.s_addr)
bgp_router_id_set (bgp, &router_id.u.prefix4);
}
return 0;
}
/* Inteface addition message from zebra. */
int
bgp_interface_add (int command, struct zclient *zclient, zebra_size_t length)
{
struct interface *ifp;
ifp = zebra_interface_add_read (zclient->ibuf);
return 0;
}
int
bgp_interface_delete (int command, struct zclient *zclient,
zebra_size_t length)
{
struct stream *s;
struct interface *ifp;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
return 0;
}
int
bgp_interface_up (int command, struct zclient *zclient, zebra_size_t length)
{
struct stream *s;
struct interface *ifp;
struct connected *c;
struct listnode *node;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
if (! ifp)
return 0;
for (node = listhead (ifp->connected); node; nextnode (node))
{
c = getdata (node);
bgp_connected_add (c);
}
return 0;
}
int
bgp_interface_down (int command, struct zclient *zclient, zebra_size_t length)
{
struct stream *s;
struct interface *ifp;
struct connected *c;
struct listnode *node;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
if (! ifp)
return 0;
for (node = listhead (ifp->connected); node; nextnode (node))
{
c = getdata (node);
bgp_connected_delete (c);
}
/* Fast external-failover (Currently IPv4 only) */
{
struct listnode *nn, *nm;
struct bgp *bgp;
struct peer *peer;
struct interface *peer_if;
LIST_LOOP (bm->bgp, bgp, nn)
{
if (CHECK_FLAG (bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER))
continue;
LIST_LOOP (bgp->peer, peer, nm)
{
if (peer->ttl != 1)
continue;
if (peer->su.sa.sa_family == AF_INET)
peer_if = if_lookup_by_ipv4 (&peer->su.sin.sin_addr);
else
continue;
if (ifp == peer_if)
BGP_EVENT_ADD (peer, BGP_Stop);
}
}
}
return 0;
}
int
bgp_interface_address_add (int command, struct zclient *zclient,
zebra_size_t length)
{
struct connected *ifc;
ifc = zebra_interface_address_read (command, zclient->ibuf);
if (ifc == NULL)
return 0;
if (if_is_operative (ifc->ifp))
bgp_connected_add (ifc);
return 0;
}
int
bgp_interface_address_delete (int command, struct zclient *zclient,
zebra_size_t length)
{
struct connected *ifc;
ifc = zebra_interface_address_read (command, zclient->ibuf);
if (ifc == NULL)
return 0;
if (if_is_operative (ifc->ifp))
bgp_connected_delete (ifc);
connected_free (ifc);
return 0;
}
/* Zebra route add and delete treatment. */
int
zebra_read_ipv4 (int command, struct zclient *zclient, zebra_size_t length)
{
struct stream *s;
struct zapi_ipv4 api;
unsigned long ifindex;
struct in_addr nexthop;
struct prefix_ipv4 p;
s = zclient->ibuf;
ifindex = 0;
nexthop.s_addr = 0;
/* Type, flags, message. */
api.type = stream_getc (s);
api.flags = stream_getc (s);
api.message = stream_getc (s);
/* IPv4 prefix. */
memset (&p, 0, sizeof (struct prefix_ipv4));
p.family = AF_INET;
p.prefixlen = stream_getc (s);
stream_get (&p.prefix, s, PSIZE (p.prefixlen));
/* Nexthop, ifindex, distance, metric. */
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP))
{
api.nexthop_num = stream_getc (s);
nexthop.s_addr = stream_get_ipv4 (s);
}
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX))
{
api.ifindex_num = stream_getc (s);
ifindex = stream_getl (s);
}
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE))
api.distance = stream_getc (s);
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC))
api.metric = stream_getl (s);
else
api.metric = 0;
if (command == ZEBRA_IPV4_ROUTE_ADD)
bgp_redistribute_add ((struct prefix *)&p, &nexthop, api.metric, api.type);
else
bgp_redistribute_delete ((struct prefix *)&p, api.type);
return 0;
}
#ifdef HAVE_IPV6
/* Zebra route add and delete treatment. */
int
zebra_read_ipv6 (int command, struct zclient *zclient, zebra_size_t length)
{
struct stream *s;
struct zapi_ipv6 api;
unsigned long ifindex;
struct in6_addr nexthop;
struct prefix_ipv6 p;
s = zclient->ibuf;
ifindex = 0;
memset (&nexthop, 0, sizeof (struct in6_addr));
/* Type, flags, message. */
api.type = stream_getc (s);
api.flags = stream_getc (s);
api.message = stream_getc (s);
/* IPv6 prefix. */
memset (&p, 0, sizeof (struct prefix_ipv6));
p.family = AF_INET6;
p.prefixlen = stream_getc (s);
stream_get (&p.prefix, s, PSIZE (p.prefixlen));
/* Nexthop, ifindex, distance, metric. */
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP))
{
api.nexthop_num = stream_getc (s);
stream_get (&nexthop, s, 16);
}
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX))
{
api.ifindex_num = stream_getc (s);
ifindex = stream_getl (s);
}
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE))
api.distance = stream_getc (s);
else
api.distance = 0;
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC))
api.metric = stream_getl (s);
else
api.metric = 0;
/* Simply ignore link-local address. */
if (IN6_IS_ADDR_LINKLOCAL (&p.prefix))
return 0;
if (command == ZEBRA_IPV6_ROUTE_ADD)
bgp_redistribute_add ((struct prefix *)&p, NULL, api.metric, api.type);
else
bgp_redistribute_delete ((struct prefix *) &p, api.type);
return 0;
}
#endif /* HAVE_IPV6 */
struct interface *
if_lookup_by_ipv4 (struct in_addr *addr)
{
struct listnode *ifnode;
struct listnode *cnode;
struct interface *ifp;
struct connected *connected;
struct prefix_ipv4 p;
struct prefix *cp;
p.family = AF_INET;
p.prefix = *addr;
p.prefixlen = IPV4_MAX_BITLEN;
for (ifnode = listhead (iflist); ifnode; nextnode (ifnode))
{
ifp = getdata (ifnode);
for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
{
connected = getdata (cnode);
cp = connected->address;
if (cp->family == AF_INET)
if (prefix_match (cp, (struct prefix *)&p))
return ifp;
}
}
return NULL;
}
struct interface *
if_lookup_by_ipv4_exact (struct in_addr *addr)
{
struct listnode *ifnode;
struct listnode *cnode;
struct interface *ifp;
struct connected *connected;
struct prefix *cp;
for (ifnode = listhead (iflist); ifnode; nextnode (ifnode))
{
ifp = getdata (ifnode);
for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
{
connected = getdata (cnode);
cp = connected->address;
if (cp->family == AF_INET)
if (IPV4_ADDR_SAME (&cp->u.prefix4, addr))
return ifp;
}
}
return NULL;
}
#ifdef HAVE_IPV6
struct interface *
if_lookup_by_ipv6 (struct in6_addr *addr)
{
struct listnode *ifnode;
struct listnode *cnode;
struct interface *ifp;
struct connected *connected;
struct prefix_ipv6 p;
struct prefix *cp;
p.family = AF_INET6;
p.prefix = *addr;
p.prefixlen = IPV6_MAX_BITLEN;
for (ifnode = listhead (iflist); ifnode; nextnode (ifnode))
{
ifp = getdata (ifnode);
for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
{
connected = getdata (cnode);
cp = connected->address;
if (cp->family == AF_INET6)
if (prefix_match (cp, (struct prefix *)&p))
return ifp;
}
}
return NULL;
}
struct interface *
if_lookup_by_ipv6_exact (struct in6_addr *addr)
{
struct listnode *ifnode;
struct listnode *cnode;
struct interface *ifp;
struct connected *connected;
struct prefix *cp;
for (ifnode = listhead (iflist); ifnode; nextnode (ifnode))
{
ifp = getdata (ifnode);
for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
{
connected = getdata (cnode);
cp = connected->address;
if (cp->family == AF_INET6)
if (IPV6_ADDR_SAME (&cp->u.prefix6, addr))
return ifp;
}
}
return NULL;
}
int
if_get_ipv6_global (struct interface *ifp, struct in6_addr *addr)
{
struct listnode *cnode;
struct connected *connected;
struct prefix *cp;
for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
{
connected = getdata (cnode);
cp = connected->address;
if (cp->family == AF_INET6)
if (! IN6_IS_ADDR_LINKLOCAL (&cp->u.prefix6))
{
memcpy (addr, &cp->u.prefix6, IPV6_MAX_BYTELEN);
return 1;
}
}
return 0;
}
int
if_get_ipv6_local (struct interface *ifp, struct in6_addr *addr)
{
struct listnode *cnode;
struct connected *connected;
struct prefix *cp;
for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
{
connected = getdata (cnode);
cp = connected->address;
if (cp->family == AF_INET6)
if (IN6_IS_ADDR_LINKLOCAL (&cp->u.prefix6))
{
memcpy (addr, &cp->u.prefix6, IPV6_MAX_BYTELEN);
return 1;
}
}
return 0;
}
#endif /* HAVE_IPV6 */
int
bgp_nexthop_set (union sockunion *local, union sockunion *remote,
struct bgp_nexthop *nexthop, struct peer *peer)
{
int ret = 0;
struct interface *ifp = NULL;
memset (nexthop, 0, sizeof (struct bgp_nexthop));
if (!local)
return -1;
if (!remote)
return -1;
if (local->sa.sa_family == AF_INET)
{
nexthop->v4 = local->sin.sin_addr;
ifp = if_lookup_by_ipv4 (&local->sin.sin_addr);
}
#ifdef HAVE_IPV6
if (local->sa.sa_family == AF_INET6)
{
if (IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr))
{
if (peer->ifname)
ifp = if_lookup_by_index (if_nametoindex (peer->ifname));
}
else
ifp = if_lookup_by_ipv6 (&local->sin6.sin6_addr);
}
#endif /* HAVE_IPV6 */
if (!ifp)
return -1;
nexthop->ifp = ifp;
/* IPv4 connection. */
if (local->sa.sa_family == AF_INET)
{
#ifdef HAVE_IPV6
/* IPv6 nexthop*/
ret = if_get_ipv6_global (ifp, &nexthop->v6_global);
/* There is no global nexthop. */
if (!ret)
if_get_ipv6_local (ifp, &nexthop->v6_global);
else
if_get_ipv6_local (ifp, &nexthop->v6_local);
#endif /* HAVE_IPV6 */
}
#ifdef HAVE_IPV6
/* IPv6 connection. */
if (local->sa.sa_family == AF_INET6)
{
struct interface *direct = NULL;
/* IPv4 nexthop. I don't care about it. */
if (peer->local_id.s_addr)
nexthop->v4 = peer->local_id;
/* Global address*/
if (! IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr))
{
memcpy (&nexthop->v6_global, &local->sin6.sin6_addr,
IPV6_MAX_BYTELEN);
/* If directory connected set link-local address. */
direct = if_lookup_by_ipv6 (&remote->sin6.sin6_addr);
if (direct)
if_get_ipv6_local (ifp, &nexthop->v6_local);
}
else
/* Link-local address. */
{
ret = if_get_ipv6_global (ifp, &nexthop->v6_global);
/* If there is no global address. Set link-local address as
global. I know this break RFC specification... */
if (!ret)
memcpy (&nexthop->v6_global, &local->sin6.sin6_addr,
IPV6_MAX_BYTELEN);
else
memcpy (&nexthop->v6_local, &local->sin6.sin6_addr,
IPV6_MAX_BYTELEN);
}
}
if (IN6_IS_ADDR_LINKLOCAL (&local->sin6.sin6_addr) ||
if_lookup_by_ipv6 (&remote->sin6.sin6_addr))
peer->shared_network = 1;
else
peer->shared_network = 0;
/* KAME stack specific treatment. */
#ifdef KAME
if (IN6_IS_ADDR_LINKLOCAL (&nexthop->v6_global)
&& IN6_LINKLOCAL_IFINDEX (nexthop->v6_global))
{
SET_IN6_LINKLOCAL_IFINDEX (nexthop->v6_global, 0);
}
if (IN6_IS_ADDR_LINKLOCAL (&nexthop->v6_local)
&& IN6_LINKLOCAL_IFINDEX (nexthop->v6_local))
{
SET_IN6_LINKLOCAL_IFINDEX (nexthop->v6_local, 0);
}
#endif /* KAME */
#endif /* HAVE_IPV6 */
return ret;
}
#ifdef HAVE_IPV6
unsigned int
bgp_ifindex_by_nexthop (struct in6_addr *addr)
{
struct listnode *ifnode;
struct listnode *cnode;
struct interface *ifp;
struct connected *connected;
struct prefix_ipv6 p;
p.family = AF_INET6;
p.prefix = *addr;
p.prefixlen = IPV6_MAX_BITLEN;
for (ifnode = listhead (iflist); ifnode; nextnode (ifnode))
{
ifp = getdata (ifnode);
for (cnode = listhead (ifp->connected); cnode; nextnode (cnode))
{
struct prefix *cp;
connected = getdata (cnode);
cp = connected->address;
if (cp->family == AF_INET6)
{
if (prefix_match (cp, (struct prefix *)&p))
return ifp->ifindex;
}
}
}
return 0;
}
#endif /* HAVE_IPV6 */
void
bgp_zebra_announce (struct prefix *p, struct bgp_info *info, struct bgp *bgp)
{
int flags;
u_char distance;
struct peer *peer;
if (zclient->sock < 0)
return;
if (! zclient->redist[ZEBRA_ROUTE_BGP])
return;
flags = 0;
peer = info->peer;
if (peer_sort (peer) == BGP_PEER_IBGP || peer_sort (peer) == BGP_PEER_CONFED)
{
SET_FLAG (flags, ZEBRA_FLAG_IBGP);
SET_FLAG (flags, ZEBRA_FLAG_INTERNAL);
}
if ((peer_sort (peer) == BGP_PEER_EBGP && peer->ttl != 1)
|| CHECK_FLAG (peer->flags, PEER_FLAG_ENFORCE_MULTIHOP))
SET_FLAG (flags, ZEBRA_FLAG_INTERNAL);
if (p->family == AF_INET)
{
struct zapi_ipv4 api;
struct in_addr *nexthop;
api.flags = flags;
nexthop = &info->attr->nexthop;
api.type = ZEBRA_ROUTE_BGP;
api.message = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.nexthop_num = 1;
api.nexthop = &nexthop;
api.ifindex_num = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
api.metric = info->attr->med;
distance = bgp_distance_apply (p, info, bgp);
if (distance)
{
SET_FLAG (api.message, ZAPI_MESSAGE_DISTANCE);
api.distance = distance;
}
zapi_ipv4_route (ZEBRA_IPV4_ROUTE_ADD, zclient,
(struct prefix_ipv4 *) p, &api);
}
#ifdef HAVE_IPV6
/* We have to think about a IPv6 link-local address curse. */
if (p->family == AF_INET6)
{
unsigned int ifindex;
struct in6_addr *nexthop;
struct zapi_ipv6 api;
ifindex = 0;
nexthop = NULL;
/* Only global address nexthop exists. */
if (info->attr->mp_nexthop_len == 16)
nexthop = &info->attr->mp_nexthop_global;
/* If both global and link-local address present. */
if (info->attr->mp_nexthop_len == 32)
{
/* Workaround for Cisco's nexthop bug. */
if (IN6_IS_ADDR_UNSPECIFIED (&info->attr->mp_nexthop_global)
&& peer->su_remote->sa.sa_family == AF_INET6)
nexthop = &peer->su_remote->sin6.sin6_addr;
else
nexthop = &info->attr->mp_nexthop_local;
if (info->peer->nexthop.ifp)
ifindex = info->peer->nexthop.ifp->ifindex;
}
if (nexthop == NULL)
return;
if (IN6_IS_ADDR_LINKLOCAL (nexthop) && ! ifindex)
{
if (info->peer->ifname)
ifindex = if_nametoindex (info->peer->ifname);
else if (info->peer->nexthop.ifp)
ifindex = info->peer->nexthop.ifp->ifindex;
}
/* Make Zebra API structure. */
api.flags = flags;
api.type = ZEBRA_ROUTE_BGP;
api.message = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.nexthop_num = 1;
api.nexthop = &nexthop;
SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
api.ifindex_num = 1;
api.ifindex = &ifindex;
SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
api.metric = info->attr->med;
zapi_ipv6_route (ZEBRA_IPV6_ROUTE_ADD, zclient,
(struct prefix_ipv6 *) p, &api);
}
#endif /* HAVE_IPV6 */
}
void
bgp_zebra_withdraw (struct prefix *p, struct bgp_info *info)
{
int flags;
struct peer *peer;
if (zclient->sock < 0)
return;
if (! zclient->redist[ZEBRA_ROUTE_BGP])
return;
peer = info->peer;
flags = 0;
if (peer_sort (peer) == BGP_PEER_IBGP)
{
SET_FLAG (flags, ZEBRA_FLAG_INTERNAL);
SET_FLAG (flags, ZEBRA_FLAG_IBGP);
}
if ((peer_sort (peer) == BGP_PEER_EBGP && peer->ttl != 1)
|| CHECK_FLAG (peer->flags, PEER_FLAG_ENFORCE_MULTIHOP))
SET_FLAG (flags, ZEBRA_FLAG_INTERNAL);
if (p->family == AF_INET)
{
struct zapi_ipv4 api;
struct in_addr *nexthop;
api.flags = flags;
nexthop = &info->attr->nexthop;
api.type = ZEBRA_ROUTE_BGP;
api.message = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.nexthop_num = 1;
api.nexthop = &nexthop;
api.ifindex_num = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
api.metric = info->attr->med;
zapi_ipv4_route (ZEBRA_IPV4_ROUTE_DELETE, zclient,
(struct prefix_ipv4 *) p, &api);
}
#ifdef HAVE_IPV6
/* We have to think about a IPv6 link-local address curse. */
if (p->family == AF_INET6)
{
struct zapi_ipv6 api;
unsigned int ifindex;
struct in6_addr *nexthop;
ifindex = 0;
nexthop = NULL;
/* Only global address nexthop exists. */
if (info->attr->mp_nexthop_len == 16)
nexthop = &info->attr->mp_nexthop_global;
/* If both global and link-local address present. */
if (info->attr->mp_nexthop_len == 32)
{
nexthop = &info->attr->mp_nexthop_local;
if (info->peer->nexthop.ifp)
ifindex = info->peer->nexthop.ifp->ifindex;
}
if (nexthop == NULL)
return;
if (IN6_IS_ADDR_LINKLOCAL (nexthop) && ! ifindex)
if (info->peer->ifname)
ifindex = if_nametoindex (info->peer->ifname);
api.flags = flags;
api.type = ZEBRA_ROUTE_BGP;
api.message = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.nexthop_num = 1;
api.nexthop = &nexthop;
SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
api.ifindex_num = 1;
api.ifindex = &ifindex;
SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
api.metric = info->attr->med;
zapi_ipv6_route (ZEBRA_IPV6_ROUTE_DELETE, zclient,
(struct prefix_ipv6 *) p, &api);
}
#endif /* HAVE_IPV6 */
}
/* Other routes redistribution into BGP. */
int
bgp_redistribute_set (struct bgp *bgp, afi_t afi, int type)
{
/* Set flag to BGP instance. */
bgp->redist[afi][type] = 1;
/* Return if already redistribute flag is set. */
if (zclient->redist[type])
return CMD_WARNING;
zclient->redist[type] = 1;
/* Return if zebra connection is not established. */
if (zclient->sock < 0)
return CMD_WARNING;
/* Send distribute add message to zebra. */
zebra_redistribute_send (ZEBRA_REDISTRIBUTE_ADD, zclient->sock, type);
return CMD_SUCCESS;
}
/* Redistribute with route-map specification. */
int
bgp_redistribute_rmap_set (struct bgp *bgp, afi_t afi, int type,
const char *name)
{
if (bgp->rmap[afi][type].name
&& (strcmp (bgp->rmap[afi][type].name, name) == 0))
return 0;
if (bgp->rmap[afi][type].name)
free (bgp->rmap[afi][type].name);
bgp->rmap[afi][type].name = strdup (name);
bgp->rmap[afi][type].map = route_map_lookup_by_name (name);
return 1;
}
/* Redistribute with metric specification. */
int
bgp_redistribute_metric_set (struct bgp *bgp, afi_t afi, int type,
u_int32_t metric)
{
if (bgp->redist_metric_flag[afi][type]
&& bgp->redist_metric[afi][type] == metric)
return 0;
bgp->redist_metric_flag[afi][type] = 1;
bgp->redist_metric[afi][type] = metric;
return 1;
}
/* Unset redistribution. */
int
bgp_redistribute_unset (struct bgp *bgp, afi_t afi, int type)
{
/* Unset flag from BGP instance. */
bgp->redist[afi][type] = 0;
/* Unset route-map. */
if (bgp->rmap[afi][type].name)
free (bgp->rmap[afi][type].name);
bgp->rmap[afi][type].name = NULL;
bgp->rmap[afi][type].map = NULL;
/* Unset metric. */
bgp->redist_metric_flag[afi][type] = 0;
bgp->redist_metric[afi][type] = 0;
/* Return if zebra connection is disabled. */
if (! zclient->redist[type])
return CMD_WARNING;
zclient->redist[type] = 0;
if (bgp->redist[AFI_IP][type] == 0
&& bgp->redist[AFI_IP6][type] == 0
&& zclient->sock >= 0)
/* Send distribute delete message to zebra. */
zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient->sock, type);
/* Withdraw redistributed routes from current BGP's routing table. */
bgp_redistribute_withdraw (bgp, afi, type);
return CMD_SUCCESS;
}
/* Unset redistribution route-map configuration. */
int
bgp_redistribute_routemap_unset (struct bgp *bgp, afi_t afi, int type)
{
if (! bgp->rmap[afi][type].name)
return 0;
/* Unset route-map. */
free (bgp->rmap[afi][type].name);
bgp->rmap[afi][type].name = NULL;
bgp->rmap[afi][type].map = NULL;
return 1;
}
/* Unset redistribution metric configuration. */
int
bgp_redistribute_metric_unset (struct bgp *bgp, afi_t afi, int type)
{
if (! bgp->redist_metric_flag[afi][type])
return 0;
/* Unset metric. */
bgp->redist_metric_flag[afi][type] = 0;
bgp->redist_metric[afi][type] = 0;
return 1;
}
void
bgp_zclient_reset ()
{
zclient_reset (zclient);
}
void
bgp_zebra_init (int enable)
{
/* Set default values. */
zclient = zclient_new ();
zclient_init (zclient, ZEBRA_ROUTE_BGP);
zclient->router_id_update = bgp_router_id_update;
zclient->interface_add = bgp_interface_add;
zclient->interface_delete = bgp_interface_delete;
zclient->interface_address_add = bgp_interface_address_add;
zclient->interface_address_delete = bgp_interface_address_delete;
zclient->ipv4_route_add = zebra_read_ipv4;
zclient->ipv4_route_delete = zebra_read_ipv4;
zclient->interface_up = bgp_interface_up;
zclient->interface_down = bgp_interface_down;
#ifdef HAVE_IPV6
zclient->ipv6_route_add = zebra_read_ipv6;
zclient->ipv6_route_delete = zebra_read_ipv6;
#endif /* HAVE_IPV6 */
/* Interface related init. */
if_init ();
}
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