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mirror_frr/ospf6d/ospf6_asbr.c
hasso e26bbebadd ospf6d part of 6Wind patch.
2003-05-25 21:39:29 +00:00

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/*
* Copyright (C) 2001-2002 Yasuhiro Ohara
*
* 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 "log.h"
#include "memory.h"
#include "prefix.h"
#include "command.h"
#include "vty.h"
#include "routemap.h"
#include "table.h"
#include "plist.h"
#include "thread.h"
#include "ospf6_prefix.h" /* xxx for ospf6_asbr.h */
#include "ospf6_lsa.h" /* xxx for ospf6_asbr.h */
#include "ospf6_route.h" /* xxx for ospf6_asbr.h, ospf6_zebra.h */
#include "ospf6_zebra.h"
#include "ospf6_asbr.h"
#include "ospf6_damp.h"
#include "ospf6_top.h"
#include "ospf6_lsdb.h"
#include "ospf6_proto.h"
extern struct thread_master *master;
struct route_table *external_table;
struct
{
char *name;
struct route_map *map;
} rmap [ZEBRA_ROUTE_MAX];
static u_int32_t link_state_id = 0;
char *
zroute_name[] =
{
"system", "kernel", "connected", "static",
"rip", "ripng", "ospf", "ospf6", "bgp", "unknown"
};
char *
zroute_abname[] =
{
"X", "K", "C", "S", "R", "R", "O", "O", "B", "?"
};
#define ZROUTE_NAME(x) \
(0 < (x) && (x) < ZEBRA_ROUTE_MAX ? \
zroute_name[(x)] : zroute_name[ZEBRA_ROUTE_MAX])
#define ZROUTE_ABNAME(x) \
(0 < (x) && (x) < ZEBRA_ROUTE_MAX ? \
zroute_abname[(x)] : zroute_abname[ZEBRA_ROUTE_MAX])
/* redistribute function */
void
ospf6_asbr_routemap_set (int type, char *mapname)
{
if (rmap[type].name)
free (rmap[type].name);
rmap[type].name = strdup (mapname);
rmap[type].map = route_map_lookup_by_name (mapname);
}
void
ospf6_asbr_routemap_unset (int type)
{
if (rmap[type].name)
free (rmap[type].name);
rmap[type].name = NULL;
rmap[type].map = NULL;
}
void
ospf6_asbr_routemap_update ()
{
int i;
for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
{
if (rmap[i].name)
rmap[i].map = route_map_lookup_by_name (rmap[i].name);
else
rmap[i].map = NULL;
}
}
DEFUN (ospf6_redistribute,
ospf6_redistribute_cmd,
"redistribute (static|kernel|connected|ripng|bgp)",
"Redistribute\n"
"Static route\n"
"Kernel route\n"
"Connected route\n"
"RIPng route\n"
"BGP route\n"
)
{
int type = 0;
if (strncmp (argv[0], "sta", 3) == 0)
type = ZEBRA_ROUTE_STATIC;
else if (strncmp (argv[0], "ker", 3) == 0)
type = ZEBRA_ROUTE_KERNEL;
else if (strncmp (argv[0], "con", 3) == 0)
type = ZEBRA_ROUTE_CONNECT;
else if (strncmp (argv[0], "rip", 3) == 0)
type = ZEBRA_ROUTE_RIPNG;
else if (strncmp (argv[0], "bgp", 3) == 0)
type = ZEBRA_ROUTE_BGP;
ospf6_zebra_no_redistribute (type);
ospf6_asbr_routemap_unset (type);
ospf6_zebra_redistribute (type);
return CMD_SUCCESS;
}
DEFUN (ospf6_redistribute_routemap,
ospf6_redistribute_routemap_cmd,
"redistribute (static|kernel|connected|ripng|bgp) route-map WORD",
"Redistribute\n"
"Static routes\n"
"Kernel route\n"
"Connected route\n"
"RIPng route\n"
"BGP route\n"
"Route map reference\n"
"Route map name\n"
)
{
int type = 0;
if (strncmp (argv[0], "sta", 3) == 0)
type = ZEBRA_ROUTE_STATIC;
else if (strncmp (argv[0], "ker", 3) == 0)
type = ZEBRA_ROUTE_KERNEL;
else if (strncmp (argv[0], "con", 3) == 0)
type = ZEBRA_ROUTE_CONNECT;
else if (strncmp (argv[0], "rip", 3) == 0)
type = ZEBRA_ROUTE_RIPNG;
else if (strncmp (argv[0], "bgp", 3) == 0)
type = ZEBRA_ROUTE_BGP;
ospf6_zebra_no_redistribute (type);
ospf6_asbr_routemap_set (type, argv[1]);
ospf6_zebra_redistribute (type);
return CMD_SUCCESS;
}
DEFUN (no_ospf6_redistribute,
no_ospf6_redistribute_cmd,
"no redistribute (static|kernel|connected|ripng|bgp)",
NO_STR
"Redistribute\n"
"Static route\n"
"Kernel route\n"
"Connected route\n"
"RIPng route\n"
"BGP route\n"
)
{
int type = 0;
struct route_node *node;
struct ospf6_external_route *route;
struct ospf6_external_info *info, *info_next = NULL;
if (strncmp (argv[0], "sta", 3) == 0)
type = ZEBRA_ROUTE_STATIC;
else if (strncmp (argv[0], "ker", 3) == 0)
type = ZEBRA_ROUTE_KERNEL;
else if (strncmp (argv[0], "con", 3) == 0)
type = ZEBRA_ROUTE_CONNECT;
else if (strncmp (argv[0], "rip", 3) == 0)
type = ZEBRA_ROUTE_RIPNG;
else if (strncmp (argv[0], "bgp", 3) == 0)
type = ZEBRA_ROUTE_BGP;
ospf6_zebra_no_redistribute (type);
ospf6_asbr_routemap_unset (type);
/* remove redistributed route */
for (node = route_top (external_table); node; node = route_next (node))
{
route = node->info;
if (! route)
continue;
for (info = route->info_head; info; info = info_next)
{
info_next = info->next;
if (info->type != type)
continue;
ospf6_asbr_route_remove (info->type, info->ifindex,
&route->prefix);
}
}
return CMD_SUCCESS;
}
int
ospf6_redistribute_config_write (struct vty *vty)
{
int i;
for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
{
if (i == ZEBRA_ROUTE_OSPF6)
continue;
if (! ospf6_zebra_is_redistribute (i))
continue;
if (rmap[i].map)
vty_out (vty, " redistribute %s route-map %s%s",
ZROUTE_NAME(i), rmap[i].name, VTY_NEWLINE);
else
vty_out (vty, " redistribute %s%s",
ZROUTE_NAME(i), VTY_NEWLINE);
}
return 0;
}
void
ospf6_redistribute_show_config (struct vty *vty)
{
int i;
if (! ospf6_zebra_is_redistribute(ZEBRA_ROUTE_SYSTEM) &&
! ospf6_zebra_is_redistribute(ZEBRA_ROUTE_KERNEL) &&
! ospf6_zebra_is_redistribute(ZEBRA_ROUTE_STATIC) &&
! ospf6_zebra_is_redistribute(ZEBRA_ROUTE_RIPNG) &&
! ospf6_zebra_is_redistribute(ZEBRA_ROUTE_BGP))
return;
vty_out (vty, " Redistributing External Routes from,%s", VTY_NEWLINE);
for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
{
if (i == ZEBRA_ROUTE_OSPF6)
continue;
if (! ospf6_zebra_is_redistribute (i))
continue;
if (rmap[i].map)
vty_out (vty, " %s with route-map %s%s",
ZROUTE_NAME(i), rmap[i].name, VTY_NEWLINE);
else
vty_out (vty, " %s%s", ZROUTE_NAME(i), VTY_NEWLINE);
}
}
/* AS External LSA origination */
int
ospf6_asbr_external_lsa_originate (struct thread *thread)
{
struct ospf6_external_info *info;
char buffer [MAXLSASIZE];
struct ospf6_lsa_as_external *e;
char *p;
info = THREAD_ARG (thread);
/* clear thread */
info->thread_originate = NULL;
if (info->is_removed)
{
if (IS_OSPF6_DUMP_ASBR)
{
char pbuf[64];
prefix2str (&info->route->prefix, pbuf, sizeof (pbuf));
zlog_info ("ASBR: quit redistribution %s: state is down",
pbuf);
}
return 0;
}
/* prepare buffer */
memset (buffer, 0, sizeof (buffer));
e = (struct ospf6_lsa_as_external *) buffer;
p = (char *) (e + 1);
if (info->metric_type == 2)
SET_FLAG (e->bits_metric, OSPF6_ASBR_BIT_E); /* type2 */
else
UNSET_FLAG (e->bits_metric, OSPF6_ASBR_BIT_E); /* type1, default */
/* forwarding address */
if (! IN6_IS_ADDR_UNSPECIFIED (&info->forwarding))
SET_FLAG (e->bits_metric, OSPF6_ASBR_BIT_F);
else
UNSET_FLAG (e->bits_metric, OSPF6_ASBR_BIT_F);
/* external route tag */
UNSET_FLAG (e->bits_metric, OSPF6_ASBR_BIT_T);
/* set metric. note: related to E bit */
OSPF6_ASBR_METRIC_SET (e, info->metric);
/* prefixlen */
e->prefix.prefix_length = info->route->prefix.prefixlen;
/* PrefixOptions */
e->prefix.prefix_options = info->prefix_options;
/* don't use refer LS-type */
e->prefix.prefix_refer_lstype = htons (0);
/* set Prefix */
memcpy (p, &info->route->prefix.u.prefix6,
OSPF6_PREFIX_SPACE (info->route->prefix.prefixlen));
ospf6_prefix_apply_mask (&e->prefix);
p += OSPF6_PREFIX_SPACE (info->route->prefix.prefixlen);
/* Forwarding address */
if (CHECK_FLAG (e->bits_metric, OSPF6_ASBR_BIT_F))
{
memcpy (p, &info->forwarding, sizeof (struct in6_addr));
p += sizeof (struct in6_addr);
}
/* External Route Tag */
if (CHECK_FLAG (e->bits_metric, OSPF6_ASBR_BIT_T))
{
/* xxx */
}
ospf6_lsa_originate (htons (OSPF6_LSA_TYPE_AS_EXTERNAL),
htonl (info->id), ospf6->router_id,
(char *) buffer, p - buffer, ospf6);
return 0;
}
int
ospf6_asbr_schedule_external (void *data)
{
struct ospf6_external_info *info = data;
u_long elasped_time, time = 0;
if (info->thread_originate)
{
if (IS_OSPF6_DUMP_ASBR)
{
char pbuf[64];
prefix2str (&info->route->prefix, pbuf, sizeof (pbuf));
zlog_info ("ASBR: schedule redistribution %s: another thread",
pbuf);
}
return 0;
}
elasped_time =
ospf6_lsa_has_elasped (htons (OSPF6_LSA_TYPE_AS_EXTERNAL),
htonl (info->id), ospf6->router_id, ospf6);
if (elasped_time < OSPF6_MIN_LS_INTERVAL)
time = OSPF6_MIN_LS_INTERVAL - elasped_time;
else
time = 0;
//if (IS_OSPF6_DUMP_ASBR)
{
char pbuf[64];
prefix2str (&info->route->prefix, pbuf, sizeof (pbuf));
zlog_info ("ASBR: schedule redistribution %s as LS-ID %ld after %lu sec",
pbuf, (u_long) info->id, time);
}
if (time)
info->thread_originate =
thread_add_timer (master, ospf6_asbr_external_lsa_originate, info, time);
else
info->thread_originate =
thread_add_timer (master, ospf6_asbr_external_lsa_originate, info, 0);
return 0;
}
int
ospf6_asbr_external_lsa_flush (void *data)
{
struct ospf6_lsa *lsa = data;
if (lsa)
ospf6_lsa_premature_aging (lsa);
return 0;
}
int
ospf6_asbr_external_lsa_refresh (void *data)
{
struct ospf6_lsa *lsa = data;
struct ospf6_lsa_as_external *e;
struct prefix prefix;
struct route_node *node;
struct ospf6_external_route *route = NULL;
struct ospf6_external_info *info = NULL;
struct ospf6_external_info *match = NULL;
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: refresh %s", lsa->str);
e = (struct ospf6_lsa_as_external *) (lsa->header + 1);
ospf6_prefix_in6_addr (&e->prefix, &prefix.u.prefix6);
prefix.prefixlen = e->prefix.prefix_length;
prefix.family = AF_INET6;
apply_mask_ipv6 ((struct prefix_ipv6 *) &prefix);
for (node = route_top (external_table); node; node = route_next (node))
{
route = node->info;
if (route == NULL)
continue;
for (info = route->info_head; info; info = info->next)
{
if (lsa->header->id == htonl (info->id))
match = info;
}
}
if (match == NULL)
{
ospf6_lsa_premature_aging (lsa);
return 0;
}
ospf6_asbr_schedule_external (match);
return 0;
#if 0
node = route_node_lookup (external_table, &prefix);
if (! node || ! node->info)
{
char pname[64];
prefix2str (&prefix, pname, sizeof (pname));
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: could not find %s: premature age", pname);
ospf6_lsa_premature_aging (lsa);
return 0;
}
/* find external_info */
route = node->info;
for (info = route->info_head; info; info = info->next)
{
if (lsa->header->id == htonl (info->id))
break;
}
if (info)
ospf6_asbr_schedule_external (info);
else
ospf6_lsa_premature_aging (lsa);
return 0;
#endif
}
void
ospf6_asbr_route_add (int type, int ifindex, struct prefix *prefix,
u_int nexthop_num, struct in6_addr *nexthop)
{
int ret;
struct route_node *node;
struct ospf6_external_route *route;
struct ospf6_external_info *info, tinfo;
#if defined (MUSICA) || defined (LINUX)
/* XXX As long as the OSPFv3 redistribution is applied to all the connected
* routes, one needs to filter the ::/96 prefixes.
* However it could be a wanted case, it will be removed soon.
*/
struct prefix_ipv6 *p = (prefix_ipv6 *)prefix;
if ((IN6_IS_ADDR_V4COMPAT(&p->prefix)) ||
(IN6_IS_ADDR_UNSPECIFIED (&p->prefix) && (p->prefixlen == 96)))
return;
#endif /* MUSICA or LINUX */
if (! ospf6_zebra_is_redistribute (type))
return;
/* apply route-map */
memset (&tinfo, 0, sizeof (struct ospf6_external_info));
if (rmap[type].map)
{
ret = route_map_apply (rmap[type].map, prefix, RMAP_OSPF6, &tinfo);
if (ret == RMAP_DENYMATCH)
{
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: denied by route-map %s", rmap[type].name);
return;
}
}
node = route_node_get (external_table, prefix);
route = node->info;
if (! route)
{
route = XMALLOC (MTYPE_OSPF6_EXTERNAL_INFO,
sizeof (struct ospf6_external_route));
memset (route, 0, sizeof (struct ospf6_external_route));
memcpy (&route->prefix, prefix, sizeof (struct prefix));
node->info = route;
route->node = node;
}
for (info = route->info_head; info; info = info->next)
{
if (info->type == type && info->ifindex == ifindex)
break;
}
if (! info)
{
info = XMALLOC (MTYPE_OSPF6_EXTERNAL_INFO,
sizeof (struct ospf6_external_info));
memset (info, 0, sizeof (struct ospf6_external_info));
info->route = route;
/* add tail */
info->prev = route->info_tail;
if (route->info_tail)
route->info_tail->next = info;
else
route->info_head = info;
route->info_tail = info;
info->id = link_state_id++;
}
/* copy result of route-map */
info->metric_type = tinfo.metric_type;
info->metric = tinfo.metric;
memcpy (&info->forwarding, &tinfo.forwarding,
sizeof (struct in6_addr));
info->type = type;
info->ifindex = ifindex;
if (nexthop_num && nexthop)
{
info->nexthop_num = nexthop_num;
if (info->nexthop)
XFREE (MTYPE_OSPF6_EXTERNAL_INFO, info->nexthop);
info->nexthop = (struct in6_addr *)
XMALLOC (MTYPE_OSPF6_EXTERNAL_INFO,
nexthop_num * sizeof (struct in6_addr));
memcpy (info->nexthop, nexthop,
nexthop_num * sizeof (struct in6_addr));
}
info->is_removed = 0;
//if (IS_OSPF6_DUMP_ASBR)
{
char pbuf[64];
struct timeval now;
prefix2str (&info->route->prefix, pbuf, sizeof (pbuf));
gettimeofday (&now, NULL);
zlog_info ("ASBR: start redistributing %s as LS-ID %ld: %ld.%06ld",
pbuf, (u_long) info->id, now.tv_sec, now.tv_usec);
}
#ifdef HAVE_OSPF6_DAMP
ospf6_damp_event_up (OSPF6_DAMP_TYPE_ROUTE, prefix,
ospf6_asbr_schedule_external, info);
#else /*HAVE_OSPF6_DAMP*/
ospf6_asbr_schedule_external (info);
#endif /*HAVE_OSPF6_DAMP*/
}
void
ospf6_asbr_route_remove (int type, int ifindex, struct prefix *prefix)
{
struct route_node *node;
struct ospf6_external_route *route;
struct ospf6_external_info *info;
struct ospf6_lsa *lsa;
#if defined (MUSICA) || defined (LINUX)
/* XXX As long as the OSPFv3 redistribution is applied to all the connected
* routes, one needs to filter the ::/96 prefixes.
* However it could be a wanted case, it will be removed soon.
*/
struct prefix_ipv6 *p = (prefix_ipv6 *)prefix;
if ((IN6_IS_ADDR_V4COMPAT(&p->prefix)) ||
(IN6_IS_ADDR_UNSPECIFIED (&p->prefix) && (p->prefixlen == 96)))
return;
#endif /* MUSICA or LINUX */
node = route_node_get (external_table, prefix);
route = node->info;
if (! route)
return;
for (info = route->info_head; info; info = info->next)
{
if (info->type == type && info->ifindex == ifindex)
break;
}
if (! info)
return;
//if (IS_OSPF6_DUMP_ASBR)
{
char pbuf[64];
struct timeval now;
prefix2str (&info->route->prefix, pbuf, sizeof (pbuf));
gettimeofday (&now, NULL);
zlog_info ("ASBR: quit redistributing %s as LS-ID %ld: %ld.%06ld",
pbuf, (u_long) info->id, now.tv_sec, now.tv_usec);
}
if (info->thread_originate)
thread_cancel (info->thread_originate);
info->thread_originate = NULL;
lsa = ospf6_lsdb_lookup (htons (OSPF6_LSA_TYPE_AS_EXTERNAL),
htonl (info->id), ospf6->router_id, ospf6);
#ifdef HAVE_OSPF6_DAMP
ospf6_damp_event_down (OSPF6_DAMP_TYPE_ROUTE, &info->route->prefix,
ospf6_asbr_external_lsa_flush, lsa);
#else /*HAVE_OSPF6_DAMP*/
ospf6_asbr_external_lsa_flush (lsa);
#endif /*HAVE_OSPF6_DAMP*/
#if 1
info->is_removed = 1;
#else
/* remove from route */
if (info->prev)
info->prev->next = info->next;
else
info->route->info_head = info->next;
if (info->next)
info->next->prev = info->prev;
else
info->route->info_tail = info->prev;
/* if no info, free route */
if (! info->route->info_head && ! info->route->info_tail)
{
info->route->node->info = NULL;
free (info->route);
}
if (info->nexthop)
free (info->nexthop);
free (info);
#endif /*0*/
}
void
ospf6_asbr_external_lsa_add (struct ospf6_lsa *lsa)
{
struct ospf6_lsa_as_external *external;
struct prefix_ls asbr_id;
struct ospf6_route_req asbr_entry;
struct ospf6_route_req request;
external = OSPF6_LSA_HEADER_END (lsa->header);
if (IS_LSA_MAXAGE (lsa))
{
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: maxage external lsa: %s seq: %lx",
lsa->str, (u_long)ntohl (lsa->header->seqnum));
ospf6_asbr_external_lsa_remove (lsa);
return;
}
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: new external lsa: %s seq: %lx",
lsa->str, (u_long)ntohl (lsa->header->seqnum));
if (lsa->header->adv_router == ospf6->router_id)
{
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: my external LSA, ignore");
return;
}
if (OSPF6_ASBR_METRIC (external) == LS_INFINITY)
{
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: metric is infinity, ignore");
return;
}
memset (&asbr_id, 0, sizeof (asbr_id));
asbr_id.family = AF_UNSPEC;
asbr_id.prefixlen = 64; /* xxx */
asbr_id.adv_router.s_addr = lsa->header->adv_router;
ospf6_route_lookup (&asbr_entry, (struct prefix *) &asbr_id,
ospf6->topology_table);
if (ospf6_route_end (&asbr_entry))
{
if (IS_OSPF6_DUMP_ASBR)
{
char buf[64];
inet_ntop (AF_INET, &asbr_id.adv_router, buf, sizeof (buf));
zlog_info ("ASBR: router %s not found, ignore", buf);
}
return;
}
memset (&request, 0, sizeof (request));
request.route.type = OSPF6_DEST_TYPE_NETWORK;
request.route.prefix.family = AF_INET6;
request.route.prefix.prefixlen = external->prefix.prefix_length;
memcpy (&request.route.prefix.u.prefix6, (char *)(external + 1),
OSPF6_PREFIX_SPACE (request.route.prefix.prefixlen));
request.path.area_id = asbr_entry.path.area_id;
request.path.origin.type = htons (OSPF6_LSA_TYPE_AS_EXTERNAL);
request.path.origin.id = lsa->header->id;
request.path.origin.adv_router = lsa->header->adv_router;
if (CHECK_FLAG (external->bits_metric, OSPF6_ASBR_BIT_E))
{
request.path.type = OSPF6_PATH_TYPE_EXTERNAL2;
request.path.metric_type = 2;
request.path.cost = asbr_entry.path.cost;
request.path.cost_e2 = OSPF6_ASBR_METRIC (external);
}
else
{
request.path.type = OSPF6_PATH_TYPE_EXTERNAL1;
request.path.metric_type = 1;
request.path.cost = asbr_entry.path.cost
+ OSPF6_ASBR_METRIC (external);
request.path.cost_e2 = 0;
}
request.path.prefix_options = external->prefix.prefix_options;
while (((struct prefix_ls *)&asbr_entry.route.prefix)->adv_router.s_addr ==
asbr_id.adv_router.s_addr &&
asbr_entry.route.type == OSPF6_DEST_TYPE_ROUTER)
{
memcpy (&request.nexthop, &asbr_entry.nexthop,
sizeof (struct ospf6_nexthop));
if (IS_OSPF6_DUMP_ASBR)
{
char buf[64], nhop[64], ifname[IFNAMSIZ];
prefix2str (&request.route.prefix, buf, sizeof (buf));
inet_ntop (AF_INET6, &request.nexthop.address, nhop, sizeof (nhop));
if_indextoname (request.nexthop.ifindex, ifname);
zlog_info ("ASBR: add route: %s %s%%%s", buf, nhop, ifname);
}
ospf6_route_add (&request, ospf6->route_table);
ospf6_route_next (&asbr_entry);
}
}
void
ospf6_asbr_external_lsa_remove (struct ospf6_lsa *lsa)
{
struct ospf6_lsa_as_external *external;
struct prefix dest;
char buf[64];
struct ospf6_route_req request;
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: withdraw external lsa: %s seq: %lx",
lsa->str, (u_long)ntohl (lsa->header->seqnum));
if (lsa->header->adv_router == ospf6->router_id)
{
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: my external LSA, ignore");
return;
}
external = OSPF6_LSA_HEADER_END (lsa->header);
memset (&dest, 0, sizeof (dest));
dest.family = AF_INET6;
dest.prefixlen = external->prefix.prefix_length;
memcpy (&dest.u.prefix6, (char *)(external + 1),
OSPF6_PREFIX_SPACE (dest.prefixlen));
ospf6_route_lookup (&request, &dest, ospf6->route_table);
if (ospf6_route_end (&request))
{
if (IS_OSPF6_DUMP_ASBR)
{
prefix2str (&dest, buf, sizeof (buf));
zlog_info ("ASBR: %s not found", buf);
}
return;
}
while (request.path.origin.id != lsa->header->id ||
request.path.origin.adv_router != lsa->header->adv_router)
{
if (prefix_same (&request.route.prefix, &dest) != 1)
{
if (IS_OSPF6_DUMP_ASBR)
zlog_info ("ASBR: Can't find the entry matches the origin");
return;
}
ospf6_route_next (&request);
}
assert (request.path.origin.id == lsa->header->id);
assert (request.path.origin.adv_router == request.path.origin.adv_router);
while (request.path.origin.id == lsa->header->id &&
request.path.origin.adv_router == lsa->header->adv_router &&
prefix_same (&request.route.prefix, &dest) == 1)
{
if (IS_OSPF6_DUMP_ASBR)
{
char nhop[64], ifname[IFNAMSIZ];
prefix2str (&dest, buf, sizeof (buf));
inet_ntop (AF_INET6, &request.nexthop.address, nhop, sizeof (nhop));
if_indextoname (request.nexthop.ifindex, ifname);
zlog_info ("ASBR: remove route: %s %s%%%s", buf, nhop, ifname);
}
ospf6_route_remove (&request, ospf6->route_table);
ospf6_route_next (&request);
}
}
void
ospf6_asbr_external_lsa_change (struct ospf6_lsa *old, struct ospf6_lsa *new)
{
assert (old || new);
if (old == NULL)
ospf6_asbr_external_lsa_add (new);
else if (new == NULL)
ospf6_asbr_external_lsa_remove (old);
else
{
ospf6_route_table_freeze (ospf6->route_table);
ospf6_asbr_external_lsa_remove (old);
ospf6_asbr_external_lsa_add (new);
ospf6_route_table_thaw (ospf6->route_table);
}
}
void
ospf6_asbr_asbr_entry_add (struct ospf6_route_req *topo_entry)
{
struct ospf6_lsdb_node node;
struct prefix_ls *inter_router;
u_int32_t id, adv_router;
inter_router = (struct prefix_ls *) &topo_entry->route.prefix;
id = inter_router->id.s_addr;
adv_router = inter_router->adv_router.s_addr;
if (IS_OSPF6_DUMP_ASBR)
{
char buf[64];
inet_ntop (AF_INET, &inter_router->adv_router, buf, sizeof (buf));
zlog_info ("ASBR: new router found: %s", buf);
}
if (ntohl (id) != 0 ||
! OSPF6_OPT_ISSET (topo_entry->path.capability, OSPF6_OPT_E))
{
zlog_warn ("ASBR: Inter topology table malformed");
return;
}
for (ospf6_lsdb_type_router (&node, htons (OSPF6_LSA_TYPE_AS_EXTERNAL),
adv_router, ospf6->lsdb);
! ospf6_lsdb_is_end (&node);
ospf6_lsdb_next (&node))
ospf6_asbr_external_lsa_add (node.lsa);
}
void
ospf6_asbr_asbr_entry_remove (struct ospf6_route_req *topo_entry)
{
struct prefix_ls *inter_router;
u_int32_t id, adv_router;
struct ospf6_route_req request;
inter_router = (struct prefix_ls *) &topo_entry->route.prefix;
id = inter_router->id.s_addr;
adv_router = inter_router->adv_router.s_addr;
if (IS_OSPF6_DUMP_ASBR)
{
char buf[64];
inet_ntop (AF_INET, &inter_router->adv_router, buf, sizeof (buf));
zlog_info ("ASBR: router disappearing: %s", buf);
}
if (ntohl (id) != 0 ||
! OSPF6_OPT_ISSET (topo_entry->path.capability, OSPF6_OPT_E))
{
zlog_warn ("ASBR: Inter topology table malformed");
}
for (ospf6_route_head (&request, ospf6->route_table);
! ospf6_route_end (&request);
ospf6_route_next (&request))
{
if (request.path.type != OSPF6_PATH_TYPE_EXTERNAL1 &&
request.path.type != OSPF6_PATH_TYPE_EXTERNAL2)
continue;
if (request.path.area_id != topo_entry->path.area_id)
continue;
if (request.path.origin.adv_router != topo_entry->path.origin.adv_router)
continue;
if (memcmp (&topo_entry->nexthop, &request.nexthop,
sizeof (struct ospf6_nexthop)))
continue;
ospf6_route_remove (&request, ospf6->route_table);
}
}
int
ospf6_asbr_external_show (struct vty *vty, struct ospf6_lsa *lsa)
{
struct ospf6_lsa_as_external *external;
char buf[128], *ptr;
struct in6_addr in6;
assert (lsa->header);
external = (struct ospf6_lsa_as_external *)(lsa->header + 1);
/* bits */
snprintf (buf, sizeof (buf), "%s%s%s",
(CHECK_FLAG (external->bits_metric, OSPF6_ASBR_BIT_E) ?
"E" : "-"),
(CHECK_FLAG (external->bits_metric, OSPF6_ASBR_BIT_F) ?
"F" : "-"),
(CHECK_FLAG (external->bits_metric, OSPF6_ASBR_BIT_T) ?
"T" : "-"));
vty_out (vty, " Bits: %s%s", buf, VTY_NEWLINE);
vty_out (vty, " Metric: %5lu%s", (u_long)OSPF6_ASBR_METRIC (external),
VTY_NEWLINE);
ospf6_prefix_options_str (external->prefix.prefix_options,
buf, sizeof (buf));
vty_out (vty, " Prefix Options: %s%s", buf, VTY_NEWLINE);
vty_out (vty, " Referenced LSType: %d%s",
ntohs (external->prefix.prefix_refer_lstype), VTY_NEWLINE);
ospf6_prefix_in6_addr (&external->prefix, &in6);
inet_ntop (AF_INET6, &in6, buf, sizeof (buf));
vty_out (vty, " Prefix: %s/%d%s",
buf, external->prefix.prefix_length, VTY_NEWLINE);
/* Forwarding-Address */
if (CHECK_FLAG (external->bits_metric, OSPF6_ASBR_BIT_F))
{
ptr = ((char *)(external + 1))
+ OSPF6_PREFIX_SPACE (external->prefix.prefix_length);
inet_ntop (AF_INET6, (struct in6_addr *) ptr, buf, sizeof (buf));
vty_out (vty, " Forwarding-Address: %s%s", buf, VTY_NEWLINE);
}
return 0;
}
void
ospf6_asbr_database_hook (struct ospf6_lsa *old, struct ospf6_lsa *new)
{
if (old)
ospf6_asbr_external_lsa_remove (old);
if (new && ! IS_LSA_MAXAGE (new))
ospf6_asbr_external_lsa_add (new);
}
void
ospf6_asbr_register_as_external ()
{
struct ospf6_lsa_slot slot;
memset (&slot, 0, sizeof (slot));
slot.type = htons (OSPF6_LSA_TYPE_AS_EXTERNAL);
slot.name = "AS-External";
slot.func_show = ospf6_asbr_external_show;
slot.func_refresh = ospf6_asbr_external_lsa_refresh;
ospf6_lsa_slot_register (&slot);
ospf6_lsdb_hook[OSPF6_LSA_TYPE_AS_EXTERNAL & OSPF6_LSTYPE_CODE_MASK].hook =
ospf6_asbr_database_hook;
}
void
ospf6_asbr_external_info_show (struct vty *vty,
struct ospf6_external_info *info)
{
char prefix_buf[64], id_buf[16];
struct in_addr id;
if (info->is_removed)
return;
id.s_addr = ntohl (info->id);
inet_ntop (AF_INET, &id, id_buf, sizeof (id_buf));
prefix2str (&info->route->prefix, prefix_buf, sizeof (prefix_buf));
vty_out (vty, "%s %-32s %3d %-15s %3d %lu(type-%d)%s",
ZROUTE_ABNAME(info->type), prefix_buf, info->ifindex, id_buf,
info->nexthop_num, (u_long) info->metric, info->metric_type,
VTY_NEWLINE);
}
void
ospf6_asbr_external_route_show (struct vty *vty,
struct ospf6_external_route *route)
{
struct ospf6_external_info *info;
for (info = route->info_head; info; info = info->next)
ospf6_asbr_external_info_show (vty, info);
}
DEFUN (show_ipv6_route_ospf6_external,
show_ipv6_route_ospf6_external_cmd,
"show ipv6 ospf6 route redistribute",
SHOW_STR
IP6_STR
ROUTE_STR
OSPF6_STR
"redistributing External information\n"
)
{
struct route_node *node;
struct ospf6_external_route *route;
vty_out (vty, "%s %-32s %3s %-15s %3s %s%s",
" ", "Prefix", "I/F", "LS-Id", "#NH", "Metric",
VTY_NEWLINE);
for (node = route_top (external_table); node; node = route_next (node))
{
route = node->info;
if (route)
ospf6_asbr_external_route_show (vty, route);
}
return CMD_SUCCESS;
}
void
ospf6_asbr_init ()
{
external_table = route_table_init ();
link_state_id = 0;
ospf6_asbr_register_as_external ();
install_element (VIEW_NODE, &show_ipv6_route_ospf6_external_cmd);
install_element (ENABLE_NODE, &show_ipv6_route_ospf6_external_cmd);
install_element (OSPF6_NODE, &ospf6_redistribute_cmd);
install_element (OSPF6_NODE, &ospf6_redistribute_routemap_cmd);
install_element (OSPF6_NODE, &no_ospf6_redistribute_cmd);
}
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