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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* IS-IS Rout(e)ing protocol - isis_events.h
*
* Copyright (C) 2001,2002 Sampo Saaristo
* Tampere University of Technology
* Institute of Communications Engineering
*/
#include <zebra.h>
#include "log.h"
#include "memory.h"
#include "if.h"
#include "linklist.h"
#include "command.h"
#include "frrevent.h"
#include "hash.h"
#include "prefix.h"
#include "stream.h"
#include "table.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_common.h"
#include "isisd/isis_flags.h"
#include "isisd/isis_circuit.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/isisd.h"
#include "isisd/isis_csm.h"
#include "isisd/isis_events.h"
#include "isisd/isis_spf.h"
#include "isisd/isis_errors.h"
void isis_event_circuit_state_change(struct isis_circuit *circuit,
struct isis_area *area, int up)
{
area->circuit_state_changes++;
if (IS_DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) circuit %s", area->area_tag,
up ? "up" : "down");
/*
* Regenerate LSPs this affects
*/
lsp_regenerate_schedule(area, IS_LEVEL_1 | IS_LEVEL_2, 0);
return;
}
static void circuit_commence_level(struct isis_circuit *circuit, int level)
{
if (IS_DEBUG_EVENTS)
zlog_debug(
"ISIS-Evt (%s) circuit %u on iface %s commencing on L%d",
circuit->area->area_tag, circuit->circuit_id,
circuit->interface->name, level);
if (!circuit->is_passive) {
if (level == 1) {
event_add_timer(master, send_l1_psnp, circuit,
isis_jitter(circuit->psnp_interval[0],
PSNP_JITTER),
&circuit->t_send_psnp[0]);
} else {
event_add_timer(master, send_l2_psnp, circuit,
isis_jitter(circuit->psnp_interval[1],
PSNP_JITTER),
&circuit->t_send_psnp[1]);
}
}
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
event_add_timer(master, isis_run_dr,
&circuit->level_arg[level - 1],
2 * circuit->hello_interval[level - 1],
&circuit->u.bc.t_run_dr[level - 1]);
send_hello_sched(circuit, level, TRIGGERED_IIH_DELAY);
circuit->u.bc.lan_neighs[level - 1] = list_new();
}
}
static void circuit_resign_level(struct isis_circuit *circuit, int level)
{
int idx = level - 1;
if (IS_DEBUG_EVENTS)
zlog_debug(
"ISIS-Evt (%s) circuit %u on iface %s resigning on L%d",
circuit->area->area_tag, circuit->circuit_id,
circuit->interface->name, level);
EVENT_OFF(circuit->t_send_csnp[idx]);
EVENT_OFF(circuit->t_send_psnp[idx]);
if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
EVENT_OFF(circuit->u.bc.t_send_lan_hello[idx]);
EVENT_OFF(circuit->u.bc.t_run_dr[idx]);
EVENT_OFF(circuit->u.bc.t_refresh_pseudo_lsp[idx]);
circuit->lsp_regenerate_pending[idx] = 0;
circuit->u.bc.run_dr_elect[idx] = 0;
circuit->u.bc.is_dr[idx] = 0;
if (circuit->u.bc.lan_neighs[idx] != NULL)
list_delete(&circuit->u.bc.lan_neighs[idx]);
}
return;
}
void isis_circuit_is_type_set(struct isis_circuit *circuit, int newtype)
{
if (!circuit->area) {
circuit->is_type = newtype;
return;
}
if (IS_DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) circuit type change %s -> %s",
circuit->area->area_tag,
circuit_t2string(circuit->is_type),
circuit_t2string(newtype));
if (circuit->is_type == newtype)
return; /* No change */
if (!(newtype & circuit->area->is_type)) {
flog_err(
EC_ISIS_CONFIG,
"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;
}
if (circuit->state != C_STATE_UP) {
circuit->is_type = newtype;
return;
}
if (!circuit->is_passive) {
switch (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->is_type = newtype;
lsp_regenerate_schedule(circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
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
*
* ***********************************************************************/
/* events supporting code */
void isis_event_dis_status_change(struct event *thread)
{
struct isis_circuit *circuit;
circuit = EVENT_ARG(thread);
/* invalid arguments */
if (!circuit || !circuit->area)
return;
if (IS_DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) DIS status change",
circuit->area->area_tag);
/* LSP generation again */
lsp_regenerate_schedule(circuit->area, IS_LEVEL_1 | IS_LEVEL_2, 0);
}
void isis_event_auth_failure(char *area_tag, const char *error_string,
uint8_t *sysid)
{
if (IS_DEBUG_EVENTS)
zlog_debug("ISIS-Evt (%s) Authentication failure %s from %pSY",
area_tag, error_string, sysid);
return;
}
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