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/*
* Copyright (C) 2003 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 "memory.h"
#include "log.h"
#include "command.h"
#include "prefix.h"
#include "table.h"
#include "vty.h"
#include "ospf6_proto.h"
#include "ospf6_lsa.h"
#include "ospf6_lsdb.h"
#include "ospf6d.h"
struct ospf6_lsdb *
ospf6_lsdb_create (void *data)
{
struct ospf6_lsdb *lsdb;
lsdb = XCALLOC (MTYPE_OSPF6_LSDB, sizeof (struct ospf6_lsdb));
if (lsdb == NULL)
{
zlog_warn ("Can't malloc lsdb");
return NULL;
}
memset (lsdb, 0, sizeof (struct ospf6_lsdb));
lsdb->data = data;
lsdb->table = route_table_init ();
return lsdb;
}
void
ospf6_lsdb_delete (struct ospf6_lsdb *lsdb)
{
ospf6_lsdb_remove_all (lsdb);
route_table_finish (lsdb->table);
XFREE (MTYPE_OSPF6_LSDB, lsdb);
}
static void
ospf6_lsdb_set_key (struct prefix_ipv6 *key, void *value, int len)
{
assert (key->prefixlen % 8 == 0);
memcpy ((caddr_t) &key->prefix + key->prefixlen / 8,
(caddr_t) value, len);
key->family = AF_INET6;
key->prefixlen += len * 8;
}
#ifndef NDEBUG
static void
_lsdb_count_assert (struct ospf6_lsdb *lsdb)
{
struct ospf6_lsa *debug;
unsigned int num = 0;
for (debug = ospf6_lsdb_head (lsdb); debug;
debug = ospf6_lsdb_next (debug))
num++;
if (num == lsdb->count)
return;
zlog_debug ("PANIC !! lsdb[%p]->count = %d, real = %d",
lsdb, lsdb->count, num);
for (debug = ospf6_lsdb_head (lsdb); debug;
debug = ospf6_lsdb_next (debug))
zlog_debug ("%p %p %s lsdb[%p]", debug->prev, debug->next, debug->name,
debug->lsdb);
zlog_debug ("DUMP END");
assert (num == lsdb->count);
}
#define ospf6_lsdb_count_assert(t) (_lsdb_count_assert (t))
#else /*NDEBUG*/
#define ospf6_lsdb_count_assert(t) ((void) 0)
#endif /*NDEBUG*/
void
ospf6_lsdb_add (struct ospf6_lsa *lsa, struct ospf6_lsdb *lsdb)
{
struct prefix_ipv6 key;
struct route_node *current, *nextnode, *prevnode;
struct ospf6_lsa *next, *prev, *old = NULL;
memset (&key, 0, sizeof (key));
ospf6_lsdb_set_key (&key, &lsa->header->type, sizeof (lsa->header->type));
ospf6_lsdb_set_key (&key, &lsa->header->adv_router,
sizeof (lsa->header->adv_router));
ospf6_lsdb_set_key (&key, &lsa->header->id, sizeof (lsa->header->id));
current = route_node_get (lsdb->table, (struct prefix *) &key);
old = current->info;
current->info = lsa;
ospf6_lsa_lock (lsa);
if (old)
{
if (old->prev)
old->prev->next = lsa;
if (old->next)
old->next->prev = lsa;
lsa->next = old->next;
lsa->prev = old->prev;
}
else
{
/* next link */
nextnode = current;
route_lock_node (nextnode);
do {
nextnode = route_next (nextnode);
} while (nextnode && nextnode->info == NULL);
if (nextnode == NULL)
lsa->next = NULL;
else
{
next = nextnode->info;
lsa->next = next;
next->prev = lsa;
route_unlock_node (nextnode);
}
/* prev link */
prevnode = current;
route_lock_node (prevnode);
do {
prevnode = route_prev (prevnode);
} while (prevnode && prevnode->info == NULL);
if (prevnode == NULL)
lsa->prev = NULL;
else
{
prev = prevnode->info;
lsa->prev = prev;
prev->next = lsa;
route_unlock_node (prevnode);
}
lsdb->count++;
}
if (old)
{
if (OSPF6_LSA_IS_CHANGED (old, lsa))
{
if (OSPF6_LSA_IS_MAXAGE (lsa))
{
if (lsdb->hook_remove)
{
(*lsdb->hook_remove) (old);
(*lsdb->hook_remove) (lsa);
}
}
else if (OSPF6_LSA_IS_MAXAGE (old))
{
if (lsdb->hook_add)
(*lsdb->hook_add) (lsa);
}
else
{
if (lsdb->hook_remove)
(*lsdb->hook_remove) (old);
if (lsdb->hook_add)
(*lsdb->hook_add) (lsa);
}
}
}
else if (OSPF6_LSA_IS_MAXAGE (lsa))
{
if (lsdb->hook_remove)
(*lsdb->hook_remove) (lsa);
}
else
{
if (lsdb->hook_add)
(*lsdb->hook_add) (lsa);
}
if (old)
ospf6_lsa_unlock (old);
ospf6_lsdb_count_assert (lsdb);
}
void
ospf6_lsdb_remove (struct ospf6_lsa *lsa, struct ospf6_lsdb *lsdb)
{
struct route_node *node;
struct prefix_ipv6 key;
memset (&key, 0, sizeof (key));
ospf6_lsdb_set_key (&key, &lsa->header->type, sizeof (lsa->header->type));
ospf6_lsdb_set_key (&key, &lsa->header->adv_router,
sizeof (lsa->header->adv_router));
ospf6_lsdb_set_key (&key, &lsa->header->id, sizeof (lsa->header->id));
node = route_node_lookup (lsdb->table, (struct prefix *) &key);
assert (node && node->info == lsa);
if (lsa->prev)
lsa->prev->next = lsa->next;
if (lsa->next)
lsa->next->prev = lsa->prev;
node->info = NULL;
lsdb->count--;
if (lsdb->hook_remove)
(*lsdb->hook_remove) (lsa);
ospf6_lsa_unlock (lsa);
route_unlock_node (node);
ospf6_lsdb_count_assert (lsdb);
}
struct ospf6_lsa *
ospf6_lsdb_lookup (u_int16_t type, u_int32_t id, u_int32_t adv_router,
struct ospf6_lsdb *lsdb)
{
struct route_node *node;
struct prefix_ipv6 key;
if (lsdb == NULL)
return NULL;
memset (&key, 0, sizeof (key));
ospf6_lsdb_set_key (&key, &type, sizeof (type));
ospf6_lsdb_set_key (&key, &adv_router, sizeof (adv_router));
ospf6_lsdb_set_key (&key, &id, sizeof (id));
node = route_node_lookup (lsdb->table, (struct prefix *) &key);
if (node == NULL || node->info == NULL)
return NULL;
return (struct ospf6_lsa *) node->info;
}
struct ospf6_lsa *
ospf6_lsdb_lookup_next (u_int16_t type, u_int32_t id, u_int32_t adv_router,
struct ospf6_lsdb *lsdb)
{
struct route_node *node;
struct route_node *matched = NULL;
struct prefix_ipv6 key;
struct prefix *p;
if (lsdb == NULL)
return NULL;
memset (&key, 0, sizeof (key));
ospf6_lsdb_set_key (&key, &type, sizeof (type));
ospf6_lsdb_set_key (&key, &adv_router, sizeof (adv_router));
ospf6_lsdb_set_key (&key, &id, sizeof (id));
p = (struct prefix *) &key;
{
char buf[64];
prefix2str (p, buf, sizeof (buf));
zlog_debug ("lsdb_lookup_next: key: %s", buf);
}
node = lsdb->table->top;
/* walk down tree. */
while (node && node->p.prefixlen <= p->prefixlen &&
prefix_match (&node->p, p))
{
matched = node;
node = node->link[prefix_bit(&p->u.prefix, node->p.prefixlen)];
}
if (matched)
node = matched;
else
node = lsdb->table->top;
route_lock_node (node);
/* skip to real existing entry */
while (node && node->info == NULL)
node = route_next (node);
if (! node)
return NULL;
if (prefix_same (&node->p, p))
{
struct route_node *prev = node;
struct ospf6_lsa *lsa_prev;
struct ospf6_lsa *lsa_next;
node = route_next (node);
while (node && node->info == NULL)
node = route_next (node);
lsa_prev = prev->info;
lsa_next = (node ? node->info : NULL);
assert (lsa_prev);
assert (lsa_prev->next == lsa_next);
if (lsa_next)
assert (lsa_next->prev == lsa_prev);
zlog_debug ("lsdb_lookup_next: assert OK with previous LSA");
}
if (! node)
return NULL;
route_unlock_node (node);
return (struct ospf6_lsa *) node->info;
}
/* Iteration function */
struct ospf6_lsa *
ospf6_lsdb_head (struct ospf6_lsdb *lsdb)
{
struct route_node *node;
node = route_top (lsdb->table);
if (node == NULL)
return NULL;
/* skip to the existing lsdb entry */
while (node && node->info == NULL)
node = route_next (node);
if (node == NULL)
return NULL;
route_unlock_node (node);
if (node->info)
ospf6_lsa_lock ((struct ospf6_lsa *) node->info);
return (struct ospf6_lsa *) node->info;
}
struct ospf6_lsa *
ospf6_lsdb_next (struct ospf6_lsa *lsa)
{
struct ospf6_lsa *next = lsa->next;
ospf6_lsa_unlock (lsa);
if (next)
ospf6_lsa_lock (next);
return next;
}
struct ospf6_lsa *
ospf6_lsdb_type_router_head (u_int16_t type, u_int32_t adv_router,
struct ospf6_lsdb *lsdb)
{
struct route_node *node;
struct prefix_ipv6 key;
struct ospf6_lsa *lsa;
memset (&key, 0, sizeof (key));
ospf6_lsdb_set_key (&key, &type, sizeof (type));
ospf6_lsdb_set_key (&key, &adv_router, sizeof (adv_router));
node = lsdb->table->top;
/* Walk down tree. */
while (node && node->p.prefixlen <= key.prefixlen &&
prefix_match (&node->p, (struct prefix *) &key))
node = node->link[prefix6_bit(&key.prefix, node->p.prefixlen)];
if (node)
route_lock_node (node);
while (node && node->info == NULL)
node = route_next (node);
if (node == NULL)
return NULL;
else
route_unlock_node (node);
if (! prefix_match ((struct prefix *) &key, &node->p))
return NULL;
lsa = node->info;
ospf6_lsa_lock (lsa);
return lsa;
}
struct ospf6_lsa *
ospf6_lsdb_type_router_next (u_int16_t type, u_int32_t adv_router,
struct ospf6_lsa *lsa)
{
struct ospf6_lsa *next = lsa->next;
if (next)
{
if (next->header->type != type ||
next->header->adv_router != adv_router)
next = NULL;
}
if (next)
ospf6_lsa_lock (next);
ospf6_lsa_unlock (lsa);
return next;
}
struct ospf6_lsa *
ospf6_lsdb_type_head (u_int16_t type, struct ospf6_lsdb *lsdb)
{
struct route_node *node;
struct prefix_ipv6 key;
struct ospf6_lsa *lsa;
memset (&key, 0, sizeof (key));
ospf6_lsdb_set_key (&key, &type, sizeof (type));
/* Walk down tree. */
node = lsdb->table->top;
while (node && node->p.prefixlen <= key.prefixlen &&
prefix_match (&node->p, (struct prefix *) &key))
node = node->link[prefix6_bit(&key.prefix, node->p.prefixlen)];
if (node)
route_lock_node (node);
while (node && node->info == NULL)
node = route_next (node);
if (node == NULL)
return NULL;
else
route_unlock_node (node);
if (! prefix_match ((struct prefix *) &key, &node->p))
return NULL;
lsa = node->info;
ospf6_lsa_lock (lsa);
return lsa;
}
struct ospf6_lsa *
ospf6_lsdb_type_next (u_int16_t type, struct ospf6_lsa *lsa)
{
struct ospf6_lsa *next = lsa->next;
if (next)
{
if (next->header->type != type)
next = NULL;
}
if (next)
ospf6_lsa_lock (next);
ospf6_lsa_unlock (lsa);
return next;
}
void
ospf6_lsdb_remove_all (struct ospf6_lsdb *lsdb)
{
struct ospf6_lsa *lsa;
for (lsa = ospf6_lsdb_head (lsdb); lsa; lsa = ospf6_lsdb_next (lsa))
ospf6_lsdb_remove (lsa, lsdb);
}
void
ospf6_lsdb_show (struct vty *vty, int level,
u_int16_t *type, u_int32_t *id, u_int32_t *adv_router,
struct ospf6_lsdb *lsdb)
{
struct ospf6_lsa *lsa;
void (*showfunc) (struct vty *, struct ospf6_lsa *) = NULL;
if (level == OSPF6_LSDB_SHOW_LEVEL_NORMAL)
showfunc = ospf6_lsa_show_summary;
else if (level == OSPF6_LSDB_SHOW_LEVEL_DETAIL)
showfunc = ospf6_lsa_show;
else if (level == OSPF6_LSDB_SHOW_LEVEL_INTERNAL)
showfunc = ospf6_lsa_show_internal;
else if (level == OSPF6_LSDB_SHOW_LEVEL_DUMP)
showfunc = ospf6_lsa_show_dump;
if (type && id && adv_router)
{
lsa = ospf6_lsdb_lookup (*type, *id, *adv_router, lsdb);
if (lsa)
{
if (level == OSPF6_LSDB_SHOW_LEVEL_NORMAL)
ospf6_lsa_show (vty, lsa);
else
(*showfunc) (vty, lsa);
}
return;
}
if (level == OSPF6_LSDB_SHOW_LEVEL_NORMAL)
ospf6_lsa_show_summary_header (vty);
if (type && adv_router)
lsa = ospf6_lsdb_type_router_head (*type, *adv_router, lsdb);
else if (type)
lsa = ospf6_lsdb_type_head (*type, lsdb);
else
lsa = ospf6_lsdb_head (lsdb);
while (lsa)
{
if ((! adv_router || lsa->header->adv_router == *adv_router) &&
(! id || lsa->header->id == *id))
(*showfunc) (vty, lsa);
if (type && adv_router)
lsa = ospf6_lsdb_type_router_next (*type, *adv_router, lsa);
else if (type)
lsa = ospf6_lsdb_type_next (*type, lsa);
else
lsa = ospf6_lsdb_next (lsa);
}
}
/* Decide new Link State ID to originate.
note return value is network byte order */
u_int32_t
ospf6_new_ls_id (u_int16_t type, u_int32_t adv_router,
struct ospf6_lsdb *lsdb)
{
struct ospf6_lsa *lsa;
u_int32_t id = 1;
for (lsa = ospf6_lsdb_type_router_head (type, adv_router, lsdb); lsa;
lsa = ospf6_lsdb_type_router_next (type, adv_router, lsa))
{
if (ntohl (lsa->header->id) < id)
continue;
if (ntohl (lsa->header->id) > id)
{
ospf6_lsa_unlock (lsa);
break;
}
id++;
}
return ((u_int32_t) htonl (id));
}
/* Decide new LS sequence number to originate.
note return value is network byte order */
u_int32_t
ospf6_new_ls_seqnum (u_int16_t type, u_int32_t id, u_int32_t adv_router,
struct ospf6_lsdb *lsdb)
{
struct ospf6_lsa *lsa;
signed long seqnum = 0;
/* if current database copy not found, return InitialSequenceNumber */
lsa = ospf6_lsdb_lookup (type, id, adv_router, lsdb);
if (lsa == NULL)
seqnum = INITIAL_SEQUENCE_NUMBER;
else
seqnum = (signed long) ntohl (lsa->header->seqnum) + 1;
return ((u_int32_t) htonl (seqnum));
}
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