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/*
* IS-IS Rout(e)ing protocol - isis_events.h
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public Licenseas published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <zebra.h>
#include <net/ethernet.h>
#include "log.h"
#include "memory.h"
#include "if.h"
#include "linklist.h"
#include "command.h"
#include "thread.h"
#include "hash.h"
#include "prefix.h"
#include "stream.h"
#include "isisd/dict.h"
#include "isisd/include-netbsd/iso.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_circuit.h"
#include "isisd/isis_tlv.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_network.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_dr.h"
#include "isisd/isis_flags.h"
#include "isisd/isisd.h"
#include "isisd/isis_csm.h"
#include "isisd/isis_events.h"
#include "isisd/isis_spf.h"
extern struct thread_master *master;
extern struct isis *isis;
/* debug isis-spf spf-events
4w4d: ISIS-Spf (tlt): L2 SPF needed, new adjacency, from 0x609229F4
4w4d: ISIS-Spf (tlt): L2, 0000.0000.0042.01-00 TLV contents changed, code 0x2
4w4d: ISIS-Spf (tlt): L2, new LSP 0 DEAD.BEEF.0043.00-00
4w5d: ISIS-Spf (tlt): L1 SPF needed, periodic SPF, from 0x6091C844
4w5d: ISIS-Spf (tlt): L2 SPF needed, periodic SPF, from 0x6091C844
*/
void
isis_event_circuit_state_change (struct isis_circuit *circuit, int up)
{
struct isis_area *area;
area = circuit->area;
assert (area);
area->circuit_state_changes++;
if (isis->debugs & DEBUG_EVENTS)
zlog_info ("ISIS-Evt (%s) circuit %s", circuit->area->area_tag,
up ? "up" : "down");
/*
* Regenerate LSPs this affects
*/
lsp_regenerate_schedule (area);
return;
}
void
isis_event_system_type_change (struct isis_area *area, int newtype)
{
struct listnode *node;
struct isis_circuit *circuit;
if (isis->debugs & DEBUG_EVENTS)
zlog_info ("ISIS-Evt (%s) system type change %s -> %s", area->area_tag,
circuit_t2string (area->is_type), circuit_t2string (newtype));
if (area->is_type == newtype)
return; /* No change */
switch (area->is_type) {
case IS_LEVEL_1:
if (area->lspdb[1] == NULL)
area->lspdb[1] = lsp_db_init ();
lsp_l2_generate (area);
break;
case IS_LEVEL_1_AND_2:
if (newtype == IS_LEVEL_1) {
lsp_db_destroy (area->lspdb[1]);
}
else {
lsp_db_destroy (area->lspdb[0]);
}
break;
case IS_LEVEL_2:
if (area->lspdb[0] == NULL)
area->lspdb[0] = lsp_db_init ();
lsp_l1_generate (area);
break;
default:
break;
}
area->is_type = newtype;
for (node = listhead (area->circuit_list); node; nextnode (node)) {
circuit = getdata (node);
isis_event_circuit_type_change (circuit, newtype);
}
spftree_area_init (area);
lsp_regenerate_schedule (area);
return;
}
void
isis_event_area_addr_change (struct isis_area *area)
{
}
void
circuit_commence_level (struct isis_circuit *circuit, int level)
{
uint32_t interval;
if (level == 1) {
circuit->t_send_psnp[0] = thread_add_timer (master, send_l1_psnp,
circuit,
isis_jitter
(circuit->psnp_interval[0],
PSNP_JITTER));
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
interval = circuit->hello_multiplier[0] * (circuit->hello_interval[0]);
circuit->u.bc.t_run_dr[0] = thread_add_timer (master, isis_run_dr_l1,
circuit, interval);
circuit->u.bc.t_send_lan_hello[0] =
thread_add_timer (master,
send_lan_l1_hello,
circuit,
isis_jitter
(circuit->hello_interval[0], IIH_JITTER));
circuit->u.bc.lan_neighs[0] = list_new ();
}
} else {
circuit->t_send_psnp[1] = thread_add_timer (master, send_l2_psnp,
circuit,
isis_jitter
(circuit->psnp_interval[1],
PSNP_JITTER));
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
interval = circuit->hello_multiplier[1] * (circuit->hello_interval[1]);
circuit->u.bc.t_run_dr[1] = thread_add_timer (master, isis_run_dr_l2,
circuit, interval);
circuit->u.bc.t_send_lan_hello[1] =
thread_add_timer (master,
send_lan_l2_hello,
circuit,
isis_jitter
(circuit->hello_interval[1], IIH_JITTER));
circuit->u.bc.lan_neighs[1] = list_new ();
}
}
return;
}
void
circuit_resign_level (struct isis_circuit *circuit, int level)
{
int idx = level - 1;
if (circuit->t_send_csnp[idx])
thread_cancel (circuit->t_send_csnp[idx]);
circuit->t_send_csnp[idx] = NULL;
if (circuit->t_send_psnp[idx])
thread_cancel (circuit->t_send_psnp[idx]);
circuit->t_send_psnp[level - 1] = NULL;
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
if (circuit->u.bc.t_send_lan_hello[idx])
thread_cancel (circuit->u.bc.t_send_lan_hello[idx]);
circuit->u.bc.t_send_lan_hello[idx] = NULL;
if (circuit->u.bc.t_run_dr[idx])
thread_cancel (circuit->u.bc.t_run_dr[idx]);
circuit->u.bc.t_run_dr[idx] = NULL;
circuit->u.bc.run_dr_elect[idx] = 0;
}
return;
}
void
isis_event_circuit_type_change (struct isis_circuit *circuit, int newtype)
{
if (isis->debugs & DEBUG_EVENTS)
zlog_info ("ISIS-Evt (%s) circuit type change %s -> %s",
circuit->area->area_tag,
circuit_t2string (circuit->circuit_is_type),
circuit_t2string (newtype));
if (circuit->circuit_is_type == newtype)
return; /* No change */
if (!(newtype & circuit->area->is_type)) {
zlog_err ("ISIS-Evt (%s) circuit type change - invalid level %s because"
" area is %s", circuit->area->area_tag,
circuit_t2string (newtype),
circuit_t2string (circuit->area->is_type));
return;
}
switch (circuit->circuit_is_type) {
case IS_LEVEL_1:
if (newtype == IS_LEVEL_2)
circuit_resign_level (circuit, 1);
circuit_commence_level (circuit, 2);
break;
case IS_LEVEL_1_AND_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level (circuit, 2);
else
circuit_resign_level (circuit, 1);
break;
case IS_LEVEL_2:
if (newtype == IS_LEVEL_1)
circuit_resign_level (circuit, 2);
circuit_commence_level (circuit, 1);
break;
default:
break;
}
circuit->circuit_is_type = newtype;
lsp_regenerate_schedule (circuit->area);
return;
}
/* 04/18/2002 by Gwak. */
/**************************************************************************
*
* EVENTS for LSP generation
*
* 1) an Adajacency or Circuit Up/Down event
* 2) a chnage in Circuit metric
* 3) a change in Reachable Address metric
* 4) a change in manualAreaAddresses
* 5) a change in systemID
* 6) a change in DIS status
* 7) a chnage in the waiting status
*
* ***********************************************************************
*
* current support event
*
* 1) Adjacency Up/Down event
* 6) a change in DIS status
*
* ***********************************************************************/
void
isis_event_adjacency_state_change (struct isis_adjacency *adj, int newstate)
{
/* adjacency state change event.
* - the only proto-type was supported */
/* invalid arguments */
if ( !adj || !adj->circuit || !adj->circuit->area ) return;
zlog_info ("ISIS-Evt (%s) Adjacency State change",
adj->circuit->area->area_tag );
/* LSP generation again */
lsp_regenerate_schedule (adj->circuit->area);
return;
}
/* events supporting code */
int
isis_event_dis_status_change (struct thread *thread)
{
struct isis_circuit *circuit;
circuit = THREAD_ARG (thread);
/* invalid arguments */
if (!circuit || !circuit->area) return 0;
zlog_info ("ISIS-Evt (%s) DIS status change", circuit->area->area_tag);
/* LSP generation again */
lsp_regenerate_schedule (circuit->area);
return 0;
}
void
isis_event_auth_failure (char *area_tag, char *error_string, char *sysid)
{
zlog_info ("ISIS-Evt (%s) Authentication failure %s from %s",
area_tag, error_string, sysid_print (sysid));
return;
}
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