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/*
* Copyright (C) 1999 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 "ospf6d.h"
static int
nbs_full_change (struct ospf6_interface *ospf6_interface)
{
CALL_FOREACH_LSA_HOOK (hook_interface, hook_change, ospf6_interface);
return 0;
}
static int
nbs_change (state_t nbs_next, char *reason, struct ospf6_neighbor *o6n)
{
state_t nbs_previous;
nbs_previous = o6n->state;
o6n->state = nbs_next;
if (nbs_previous == nbs_next)
return 0;
/* statistics */
o6n->ospf6_stat_state_changed++;
gettimeofday (&o6n->last_changed, NULL);
/* log */
if (IS_OSPF6_DUMP_NEIGHBOR)
{
if (reason)
zlog_info ("Neighbor status change %s: [%s]->[%s](%s)",
o6n->str,
ospf6_neighbor_state_string[nbs_previous],
ospf6_neighbor_state_string[nbs_next],
reason);
else
zlog_info ("Neighbor status change %s: [%s]->[%s]",
o6n->str,
ospf6_neighbor_state_string[nbs_previous],
ospf6_neighbor_state_string[nbs_next]);
}
if (nbs_previous == NBS_FULL || nbs_next == NBS_FULL)
nbs_full_change (o6n->ospf6_interface);
/* check for LSAs that already reached MaxAge */
if ((nbs_previous == NBS_EXCHANGE || nbs_previous == NBS_LOADING) &&
(nbs_next != NBS_EXCHANGE && nbs_next != NBS_LOADING))
{
ospf6_maxage_remover ();
}
CALL_CHANGE_HOOK (&neighbor_hook, o6n);
return 0;
}
/* RFC2328 section 10.4 */
int
need_adjacency (struct ospf6_neighbor *o6n)
{
if (o6n->ospf6_interface->state == IFS_PTOP)
return 1;
if (o6n->ospf6_interface->state == IFS_DR)
return 1;
if (o6n->ospf6_interface->state == IFS_BDR)
return 1;
if (o6n->router_id == o6n->ospf6_interface->dr)
return 1;
if (o6n->router_id == o6n->ospf6_interface->bdr)
return 1;
return 0;
}
int
hello_received (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *HelloReceived*", o6n->str);
if (o6n->inactivity_timer)
thread_cancel (o6n->inactivity_timer);
o6n->inactivity_timer = thread_add_timer (master, inactivity_timer, o6n,
o6n->ospf6_interface->dead_interval);
if (o6n->state <= NBS_DOWN)
nbs_change (NBS_INIT, "HelloReceived", o6n);
return 0;
}
int
twoway_received (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (o6n->state > NBS_INIT)
return 0;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *2Way-Received*", o6n->str);
thread_add_event (master, neighbor_change, o6n->ospf6_interface, 0);
if (!need_adjacency (o6n))
{
nbs_change (NBS_TWOWAY, "No Need Adjacency", o6n);
return 0;
}
else
nbs_change (NBS_EXSTART, "Need Adjacency", o6n);
DD_MSBIT_SET (o6n->dbdesc_bits);
DD_MBIT_SET (o6n->dbdesc_bits);
DD_IBIT_SET (o6n->dbdesc_bits);
if (o6n->thread_send_dbdesc)
thread_cancel (o6n->thread_send_dbdesc);
o6n->thread_send_dbdesc =
thread_add_event (master, ospf6_send_dbdesc, o6n, 0);
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc = (struct thread *) NULL;
return 0;
}
int
negotiation_done (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (o6n->state != NBS_EXSTART)
return 0;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *NegotiationDone*", o6n->str);
nbs_change (NBS_EXCHANGE, "NegotiationDone", o6n);
DD_IBIT_CLEAR (o6n->dbdesc_bits);
return 0;
}
int
exchange_done (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (o6n->state != NBS_EXCHANGE)
return 0;
if (o6n->thread_rxmt_dbdesc)
thread_cancel (o6n->thread_rxmt_dbdesc);
o6n->thread_rxmt_dbdesc = (struct thread *) NULL;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *ExchangeDone*", o6n->str);
ospf6_lsdb_remove_all (o6n->dbdesc_list);
thread_add_timer (master, ospf6_neighbor_last_dbdesc_release, o6n,
o6n->ospf6_interface->dead_interval);
if (o6n->request_list->count == 0)
nbs_change (NBS_FULL, "Requestlist Empty", o6n);
else
{
thread_add_event (master, ospf6_send_lsreq, o6n, 0);
nbs_change (NBS_LOADING, "Requestlist Not Empty", o6n);
}
return 0;
}
int
loading_done (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (o6n->state != NBS_LOADING)
return 0;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *LoadingDone*", o6n->str);
assert (o6n->request_list->count == 0);
nbs_change (NBS_FULL, "LoadingDone", o6n);
return 0;
}
int
adj_ok (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *AdjOK?*", o6n->str);
if (o6n->state == NBS_TWOWAY)
{
if (!need_adjacency (o6n))
{
nbs_change (NBS_TWOWAY, "No Need Adjacency", o6n);
return 0;
}
else
nbs_change (NBS_EXSTART, "Need Adjacency", o6n);
DD_MSBIT_SET (o6n->dbdesc_bits);
DD_MBIT_SET (o6n->dbdesc_bits);
DD_IBIT_SET (o6n->dbdesc_bits);
if (o6n->thread_send_dbdesc)
thread_cancel (o6n->thread_send_dbdesc);
o6n->thread_send_dbdesc =
thread_add_event (master, ospf6_send_dbdesc, o6n, 0);
return 0;
}
if (o6n->state >= NBS_EXSTART)
{
if (need_adjacency (o6n))
return 0;
else
{
nbs_change (NBS_TWOWAY, "No Need Adjacency", o6n);
ospf6_neighbor_lslist_clear (o6n);
}
}
return 0;
}
int
seqnumber_mismatch (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (o6n->state < NBS_EXCHANGE)
return 0;
/* statistics */
o6n->ospf6_stat_seqnum_mismatch++;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *SeqNumberMismatch*", o6n->str);
nbs_change (NBS_EXSTART, "SeqNumberMismatch", o6n);
DD_MSBIT_SET (o6n->dbdesc_bits);
DD_MBIT_SET (o6n->dbdesc_bits);
DD_IBIT_SET (o6n->dbdesc_bits);
ospf6_neighbor_lslist_clear (o6n);
if (o6n->thread_send_dbdesc)
thread_cancel (o6n->thread_send_dbdesc);
o6n->thread_send_dbdesc =
thread_add_event (master, ospf6_send_dbdesc, o6n, 0);
return 0;
}
int
bad_lsreq (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (o6n->state < NBS_EXCHANGE)
return 0;
/* statistics */
o6n->ospf6_stat_bad_lsreq++;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *BadLSReq*", o6n->str);
nbs_change (NBS_EXSTART, "BadLSReq", o6n);
DD_MSBIT_SET (o6n->dbdesc_bits);
DD_MBIT_SET (o6n->dbdesc_bits);
DD_IBIT_SET (o6n->dbdesc_bits);
ospf6_neighbor_lslist_clear (o6n);
if (o6n->thread_send_dbdesc)
thread_cancel (o6n->thread_send_dbdesc);
o6n->thread_send_dbdesc =
thread_add_event (master, ospf6_send_dbdesc, o6n, 0);
return 0;
}
int
oneway_received (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
if (o6n->state < NBS_TWOWAY)
return 0;
/* statistics */
o6n->ospf6_stat_oneway_received++;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *1Way-Received*", o6n->str);
nbs_change (NBS_INIT, "1Way-Received", o6n);
thread_add_event (master, neighbor_change, o6n->ospf6_interface, 0);
ospf6_neighbor_thread_cancel_all (o6n);
ospf6_neighbor_lslist_clear (o6n);
return 0;
}
int
inactivity_timer (struct thread *thread)
{
struct ospf6_neighbor *o6n;
o6n = (struct ospf6_neighbor *) THREAD_ARG (thread);
assert (o6n);
/* statistics */
o6n->ospf6_stat_inactivity_timer++;
if (IS_OSPF6_DUMP_NEIGHBOR)
zlog_info ("Neighbor Event %s: *InactivityTimer*", o6n->str);
o6n->inactivity_timer = NULL;
o6n->dr = o6n->bdr = o6n->prevdr = o6n->prevbdr = 0;
nbs_change (NBS_DOWN, "InactivityTimer", o6n);
thread_add_event (master, neighbor_change, o6n->ospf6_interface, 0);
listnode_delete (o6n->ospf6_interface->neighbor_list, o6n);
ospf6_neighbor_delete (o6n);
return 0;
}
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