bgp_zebra.c
上传用户:xiaozhuqw
上传日期:2009-11-15
资源大小:1338k
文件大小:23k
- /* 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;
- /* Update default router id. */
- int
- bgp_if_update (struct interface *ifp)
- {
- struct bgp *bgp;
- listnode cn;
- struct listnode *nn;
- struct listnode *nm;
- struct peer *peer;
- for (cn = listhead (ifp->connected); cn; nextnode (cn))
- {
- struct connected *co;
- struct in_addr addr;
- co = getdata (cn);
- if (co->address->family == AF_INET)
- {
- addr = co->address->u.prefix4;
- /* Ignore NET127. */
- if (IPV4_NET127 (ntohl (addr.s_addr)))
- continue;
- LIST_LOOP (bm->bgp, bgp, nn)
- {
- /* Respect configured router id */
- if (! (bgp->config & BGP_CONFIG_ROUTER_ID))
- if (ntohl (bgp->router_id.s_addr) < ntohl (addr.s_addr))
- {
- bgp->router_id = addr;
- LIST_LOOP (bgp->peer, peer, nm)
- {
- peer->local_id = addr;
- }
- }
- }
- }
- }
- return 0;
- }
- int
- bgp_if_update_all ()
- {
- listnode node;
- struct interface *ifp;
- for (node = listhead (iflist); node; node = nextnode (node))
- {
- ifp = getdata (node);
- bgp_if_update (ifp);
- }
- 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);
- bgp_if_update (ifp);
- 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;
- 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;
- 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_add_read (zclient->ibuf);
- if (ifc == NULL)
- return 0;
- bgp_if_update (ifc->ifp);
- if (if_is_up (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_delete_read (zclient->ibuf);
- if (ifc == NULL)
- return 0;
- bgp_if_update (ifc->ifp);
- if (if_is_up (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)
- {
- listnode ifnode;
- 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)
- {
- listnode ifnode;
- 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)
- {
- listnode ifnode;
- 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)
- {
- listnode ifnode;
- 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)
- {
- 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)
- {
- 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)
- {
- listnode ifnode;
- 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_DISABLE_CONNECTED_CHECK))
- 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_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_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_DISABLE_CONNECTED_CHECK))
- 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_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_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, 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->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 ();
- }