[mirror_frr.git] / isisd / isis_vty.c

/*
 * IS-IS Rout(e)ing protocol - isis_circuit.h
 *
 * Copyright (C) 2001,2002   Sampo Saaristo
 *                           Tampere University of Technology      
 *                           Institute of Communications Engineering
 * Copyright (C) 2016        David Lamparter, for NetDEF, Inc.
 *
 * 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 <zebra.h>
#include <command.h>

#include "isis_circuit.h"
#include "isis_csm.h"
#include "isis_misc.h"
#include "isisd.h"

static struct isis_circuit *
isis_circuit_lookup (struct vty *vty)
{
  struct interface *ifp = VTY_GET_CONTEXT(interface);
  struct isis_circuit *circuit;

  if (!ifp)
    {
      vty_out (vty, "Invalid interface %s", VTY_NEWLINE);
      return NULL;
    }

  circuit = circuit_scan_by_ifp (ifp);
  if (!circuit)
    {
      vty_out (vty, "ISIS is not enabled on circuit %s%s",
               ifp->name, VTY_NEWLINE);
      return NULL;
    }

  return circuit;
}

DEFUN (ip_router_isis,
       ip_router_isis_cmd,
       "ip router isis WORD",
       "Interface Internet Protocol config commands\n"
       "IP router interface commands\n"
       "IS-IS Routing for IP\n"
       "Routing process tag\n")
{
  int idx_afi = 0;
  int idx_word = 3;
  VTY_DECLVAR_CONTEXT (interface, ifp);
  struct isis_circuit *circuit;
  struct isis_area *area;
  const char *af = argv[idx_afi]->arg;
  const char *area_tag = argv[idx_word]->arg;

  /* Prevent more than one area per circuit */
  circuit = circuit_scan_by_ifp (ifp);
  if (circuit && circuit->area)
    {
      if (strcmp (circuit->area->area_tag, area_tag))
        {
          vty_out (vty, "ISIS circuit is already defined on %s%s",
                   circuit->area->area_tag, VTY_NEWLINE);
          return CMD_ERR_NOTHING_TODO;
        }
    }

  area = isis_area_lookup (area_tag);
  if (!area)
    area = isis_area_create (area_tag);

  if (!circuit || !circuit->area) {
    circuit = isis_circuit_create (area, ifp);

    if (circuit->state != C_STATE_CONF && circuit->state != C_STATE_UP)
      {
        vty_out(vty, "Couldn't bring up interface, please check log.%s", VTY_NEWLINE);
        return CMD_WARNING;
      }
  }

  bool ip = circuit->ip_router, ipv6 = circuit->ipv6_router;
  if (af[2] != '\0')
    ipv6 = true;
  else
    ip = true;

  isis_circuit_af_set (circuit, ip, ipv6);
  return CMD_SUCCESS;
}

DEFUN (ip6_router_isis,
       ip6_router_isis_cmd,
       "ipv6 router isis WORD",
       "Interface Internet Protocol config commands\n"
       "IP router interface commands\n"
       "IS-IS Routing for IP\n"
       "Routing process tag\n")
{
  return ip_router_isis (self, vty, argc, argv);
}

DEFUN (no_ip_router_isis,
       no_ip_router_isis_cmd,
       "no <ip|ipv6> router isis WORD",
       NO_STR
       "Interface Internet Protocol config commands\n"
       "IP router interface commands\n"
       "IP router interface commands\n"
       "IS-IS Routing for IP\n"
       "Routing process tag\n")
{
  int idx_afi = 1;
  int idx_word = 4;
  VTY_DECLVAR_CONTEXT (interface, ifp);
  struct isis_area *area;
  struct isis_circuit *circuit;
  const char *af = argv[idx_afi]->arg;
  const char *area_tag = argv[idx_word]->arg;

  area = isis_area_lookup (area_tag);
  if (!area)
    {
      vty_out (vty, "Can't find ISIS instance %s%s",
               argv[idx_afi]->arg, VTY_NEWLINE);
      return CMD_ERR_NO_MATCH;
    }

  circuit = circuit_lookup_by_ifp (ifp, area->circuit_list);
  if (!circuit)
    {
      vty_out (vty, "ISIS is not enabled on circuit %s%s",
               ifp->name, VTY_NEWLINE);
      return CMD_ERR_NO_MATCH;
    }

  bool ip = circuit->ip_router, ipv6 = circuit->ipv6_router;
  if (af[2] != '\0')
    ipv6 = false;
  else
    ip = false;

  isis_circuit_af_set (circuit, ip, ipv6);
  return CMD_SUCCESS;
}

DEFUN (isis_passive,
       isis_passive_cmd,
       "isis passive",
       "IS-IS commands\n"
       "Configure the passive mode for interface\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  isis_circuit_passive_set (circuit, 1);
  return CMD_SUCCESS;
}

DEFUN (no_isis_passive,
       no_isis_passive_cmd,
       "no isis passive",
       NO_STR
       "IS-IS commands\n"
       "Configure the passive mode for interface\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  if (if_is_loopback (circuit->interface))
    {
      vty_out (vty, "Can't set no passive for loopback interface%s",
               VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  isis_circuit_passive_set (circuit, 0);
  return CMD_SUCCESS;
}

DEFUN (isis_circuit_type,
       isis_circuit_type_cmd,
       "isis circuit-type <level-1|level-1-2|level-2-only>",
       "IS-IS commands\n"
       "Configure circuit type for interface\n"
       "Level-1 only adjacencies are formed\n"
       "Level-1-2 adjacencies are formed\n"
       "Level-2 only adjacencies are formed\n")
{
  int idx_level = 2;
  int is_type;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  is_type = string2circuit_t (argv[idx_level]->arg);
  if (!is_type)
    {
      vty_out (vty, "Unknown circuit-type %s", VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  if (circuit->state == C_STATE_UP &&
      circuit->area->is_type != IS_LEVEL_1_AND_2 &&
      circuit->area->is_type != is_type)
    {
      vty_out (vty, "Invalid circuit level for area %s.%s",
               circuit->area->area_tag, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }
  isis_circuit_is_type_set (circuit, is_type);

  return CMD_SUCCESS;
}

DEFUN (no_isis_circuit_type,
       no_isis_circuit_type_cmd,
       "no isis circuit-type <level-1|level-1-2|level-2-only>",
       NO_STR
       "IS-IS commands\n"
       "Configure circuit type for interface\n"
       "Level-1 only adjacencies are formed\n"
       "Level-1-2 adjacencies are formed\n"
       "Level-2 only adjacencies are formed\n")
{
  int is_type;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  /*
   * Set the circuits level to its default value
   */
  if (circuit->state == C_STATE_UP)
    is_type = circuit->area->is_type;
  else
    is_type = IS_LEVEL_1_AND_2;
  isis_circuit_is_type_set (circuit, is_type);

  return CMD_SUCCESS;
}

DEFUN (isis_network,
       isis_network_cmd,
       "isis network point-to-point",
       "IS-IS commands\n"
       "Set network type\n"
       "point-to-point network type\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  if (isis_circuit_circ_type_set(circuit, CIRCUIT_T_P2P))
    {
      vty_out (vty, "isis network point-to-point "
               "is valid only on broadcast interfaces%s",
               VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  return CMD_SUCCESS;
}

DEFUN (no_isis_network,
       no_isis_network_cmd,
       "no isis network point-to-point",
       NO_STR
       "IS-IS commands\n"
       "Set network type for circuit\n"
       "point-to-point network type\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  if (isis_circuit_circ_type_set(circuit, CIRCUIT_T_BROADCAST))
    {
      vty_out (vty, "isis network point-to-point "
               "is valid only on broadcast interfaces%s",
               VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  return CMD_SUCCESS;
}

DEFUN (isis_passwd,
       isis_passwd_cmd,
       "isis password <md5|clear> WORD",
       "IS-IS commands\n"
       "Configure the authentication password for a circuit\n"
       "HMAC-MD5 authentication\n"
       "Cleartext password\n"
       "Circuit password\n")
{
  int idx_encryption = 2;
  int idx_word = 3;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  int rv;
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  if (argv[idx_encryption]->arg[0] == 'm')
    rv = isis_circuit_passwd_hmac_md5_set(circuit, argv[idx_word]->arg);
  else
    rv = isis_circuit_passwd_cleartext_set(circuit, argv[idx_word]->arg);
  if (rv)
    {
      vty_out (vty, "Too long circuit password (>254)%s", VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  return CMD_SUCCESS;
}

DEFUN (no_isis_passwd,
       no_isis_passwd_cmd,
       "no isis password [<md5|clear> WORD]",
       NO_STR
       "IS-IS commands\n"
       "Configure the authentication password for a circuit\n"
       "HMAC-MD5 authentication\n"
       "Cleartext password\n"
       "Circuit password\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  isis_circuit_passwd_unset(circuit);

  return CMD_SUCCESS;
}


DEFUN (isis_priority,
       isis_priority_cmd,
       "isis priority (0-127)",
       "IS-IS commands\n"
       "Set priority for Designated Router election\n"
       "Priority value\n")
{
  int idx_number = 2;
  int prio;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  prio = atoi (argv[idx_number]->arg);
  if (prio < MIN_PRIORITY || prio > MAX_PRIORITY)
    {
      vty_out (vty, "Invalid priority %d - should be <0-127>%s",
               prio, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->priority[0] = prio;
  circuit->priority[1] = prio;

  return CMD_SUCCESS;
}

DEFUN (no_isis_priority,
       no_isis_priority_cmd,
       "no isis priority [(0-127)]",
       NO_STR
       "IS-IS commands\n"
       "Set priority for Designated Router election\n"
       "Priority value\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->priority[0] = DEFAULT_PRIORITY;
  circuit->priority[1] = DEFAULT_PRIORITY;

  return CMD_SUCCESS;
}


DEFUN (isis_priority_l1,
       isis_priority_l1_cmd,
       "isis priority (0-127) level-1",
       "IS-IS commands\n"
       "Set priority for Designated Router election\n"
       "Priority value\n"
       "Specify priority for level-1 routing\n")
{
  int idx_number = 2;
  int prio;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  prio = atoi (argv[idx_number]->arg);
  if (prio < MIN_PRIORITY || prio > MAX_PRIORITY)
    {
      vty_out (vty, "Invalid priority %d - should be <0-127>%s",
               prio, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->priority[0] = prio;

  return CMD_SUCCESS;
}

DEFUN (no_isis_priority_l1,
       no_isis_priority_l1_cmd,
       "no isis priority [(0-127)] level-1",
       NO_STR
       "IS-IS commands\n"
       "Set priority for Designated Router election\n"
       "Priority value\n"
       "Specify priority for level-1 routing\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->priority[0] = DEFAULT_PRIORITY;

  return CMD_SUCCESS;
}


DEFUN (isis_priority_l2,
       isis_priority_l2_cmd,
       "isis priority (0-127) level-2",
       "IS-IS commands\n"
       "Set priority for Designated Router election\n"
       "Priority value\n"
       "Specify priority for level-2 routing\n")
{
  int idx_number = 2;
  int prio;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  prio = atoi (argv[idx_number]->arg);
  if (prio < MIN_PRIORITY || prio > MAX_PRIORITY)
    {
      vty_out (vty, "Invalid priority %d - should be <0-127>%s",
               prio, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->priority[1] = prio;

  return CMD_SUCCESS;
}

DEFUN (no_isis_priority_l2,
       no_isis_priority_l2_cmd,
       "no isis priority [(0-127)] level-2",
       NO_STR
       "IS-IS commands\n"
       "Set priority for Designated Router election\n"
       "Priority value\n"
       "Specify priority for level-2 routing\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->priority[1] = DEFAULT_PRIORITY;

  return CMD_SUCCESS;
}


/* Metric command */
DEFUN (isis_metric,
       isis_metric_cmd,
       "isis metric (0-16777215)",
       "IS-IS commands\n"
       "Set default metric for circuit\n"
       "Default metric value\n")
{
  int idx_number = 2;
  int met;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  met = atoi (argv[idx_number]->arg);

  /* RFC3787 section 5.1 */
  if (circuit->area && circuit->area->oldmetric == 1 &&
      met > MAX_NARROW_LINK_METRIC)
    {
      vty_out (vty, "Invalid metric %d - should be <0-63> "
               "when narrow metric type enabled%s",
               met, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  /* RFC4444 */
  if (circuit->area && circuit->area->newmetric == 1 &&
      met > MAX_WIDE_LINK_METRIC)
    {
      vty_out (vty, "Invalid metric %d - should be <0-16777215> "
               "when wide metric type enabled%s",
               met, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  isis_circuit_metric_set (circuit, IS_LEVEL_1, met);
  isis_circuit_metric_set (circuit, IS_LEVEL_2, met);
  return CMD_SUCCESS;
}


DEFUN (no_isis_metric,
       no_isis_metric_cmd,
       "no isis metric [(0-16777215)]",
       NO_STR
       "IS-IS commands\n"
       "Set default metric for circuit\n"
       "Default metric value\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  isis_circuit_metric_set (circuit, IS_LEVEL_1, DEFAULT_CIRCUIT_METRIC);
  isis_circuit_metric_set (circuit, IS_LEVEL_2, DEFAULT_CIRCUIT_METRIC);
  return CMD_SUCCESS;
}


DEFUN (isis_metric_l1,
       isis_metric_l1_cmd,
       "isis metric (0-16777215) level-1",
       "IS-IS commands\n"
       "Set default metric for circuit\n"
       "Default metric value\n"
       "Specify metric for level-1 routing\n")
{
  int idx_number = 2;
  int met;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  met = atoi (argv[idx_number]->arg);

  /* RFC3787 section 5.1 */
  if (circuit->area && circuit->area->oldmetric == 1 &&
      met > MAX_NARROW_LINK_METRIC)
    {
      vty_out (vty, "Invalid metric %d - should be <0-63> "
               "when narrow metric type enabled%s",
               met, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  /* RFC4444 */
  if (circuit->area && circuit->area->newmetric == 1 &&
      met > MAX_WIDE_LINK_METRIC)
    {
      vty_out (vty, "Invalid metric %d - should be <0-16777215> "
               "when wide metric type enabled%s",
               met, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  isis_circuit_metric_set (circuit, IS_LEVEL_1, met);
  return CMD_SUCCESS;
}


DEFUN (no_isis_metric_l1,
       no_isis_metric_l1_cmd,
       "no isis metric [(0-16777215)] level-1",
       NO_STR
       "IS-IS commands\n"
       "Set default metric for circuit\n"
       "Default metric value\n"
       "Specify metric for level-1 routing\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  isis_circuit_metric_set (circuit, IS_LEVEL_1, DEFAULT_CIRCUIT_METRIC);
  return CMD_SUCCESS;
}


DEFUN (isis_metric_l2,
       isis_metric_l2_cmd,
       "isis metric (0-16777215) level-2",
       "IS-IS commands\n"
       "Set default metric for circuit\n"
       "Default metric value\n"
       "Specify metric for level-2 routing\n")
{
  int idx_number = 2;
  int met;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  met = atoi (argv[idx_number]->arg);

  /* RFC3787 section 5.1 */
  if (circuit->area && circuit->area->oldmetric == 1 &&
      met > MAX_NARROW_LINK_METRIC)
    {
      vty_out (vty, "Invalid metric %d - should be <0-63> "
               "when narrow metric type enabled%s",
               met, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  /* RFC4444 */
  if (circuit->area && circuit->area->newmetric == 1 &&
      met > MAX_WIDE_LINK_METRIC)
    {
      vty_out (vty, "Invalid metric %d - should be <0-16777215> "
               "when wide metric type enabled%s",
               met, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  isis_circuit_metric_set (circuit, IS_LEVEL_2, met);
  return CMD_SUCCESS;
}


DEFUN (no_isis_metric_l2,
       no_isis_metric_l2_cmd,
       "no isis metric [(0-16777215)] level-2",
       NO_STR
       "IS-IS commands\n"
       "Set default metric for circuit\n"
       "Default metric value\n"
       "Specify metric for level-2 routing\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  isis_circuit_metric_set (circuit, IS_LEVEL_2, DEFAULT_CIRCUIT_METRIC);
  return CMD_SUCCESS;
}

/* end of metrics */

DEFUN (isis_hello_interval,
       isis_hello_interval_cmd,
       "isis hello-interval (1-600)",
       "IS-IS commands\n"
       "Set Hello interval\n"
       "Hello interval value\n"
       "Holdtime 1 seconds, interval depends on multiplier\n")
{
  int idx_number = 2;
  int interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atoi (argv[idx_number]->arg);
  if (interval < MIN_HELLO_INTERVAL || interval > MAX_HELLO_INTERVAL)
    {
      vty_out (vty, "Invalid hello-interval %d - should be <1-600>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->hello_interval[0] = (u_int16_t) interval;
  circuit->hello_interval[1] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_isis_hello_interval,
       no_isis_hello_interval_cmd,
       "no isis hello-interval [(1-600)]",
       NO_STR
       "IS-IS commands\n"
       "Set Hello interval\n"
       "Holdtime 1 second, interval depends on multiplier\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->hello_interval[0] = DEFAULT_HELLO_INTERVAL;
  circuit->hello_interval[1] = DEFAULT_HELLO_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (isis_hello_interval_l1,
       isis_hello_interval_l1_cmd,
       "isis hello-interval (1-600) level-1",
       "IS-IS commands\n"
       "Set Hello interval\n"
       "Hello interval value\n"
       "Holdtime 1 second, interval depends on multiplier\n"
       "Specify hello-interval for level-1 IIHs\n")
{
  int idx_number = 2;
  long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atoi (argv[idx_number]->arg);
  if (interval < MIN_HELLO_INTERVAL || interval > MAX_HELLO_INTERVAL)
    {
      vty_out (vty, "Invalid hello-interval %ld - should be <1-600>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->hello_interval[0] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_isis_hello_interval_l1,
       no_isis_hello_interval_l1_cmd,
       "no isis hello-interval [(1-600)] level-1",
       NO_STR
       "IS-IS commands\n"
       "Set Hello interval\n"
       "Holdtime 1 second, interval depends on multiplier\n"
       "Specify hello-interval for level-1 IIHs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->hello_interval[0] = DEFAULT_HELLO_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (isis_hello_interval_l2,
       isis_hello_interval_l2_cmd,
       "isis hello-interval (1-600) level-2",
       "IS-IS commands\n"
       "Set Hello interval\n"
       "Hello interval value\n"
       "Holdtime 1 second, interval depends on multiplier\n"
       "Specify hello-interval for level-2 IIHs\n")
{
  int idx_number = 2;
  long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atoi (argv[idx_number]->arg);
  if (interval < MIN_HELLO_INTERVAL || interval > MAX_HELLO_INTERVAL)
    {
      vty_out (vty, "Invalid hello-interval %ld - should be <1-600>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->hello_interval[1] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_isis_hello_interval_l2,
       no_isis_hello_interval_l2_cmd,
       "no isis hello-interval [(1-600)] level-2",
       NO_STR
       "IS-IS commands\n"
       "Set Hello interval\n"
       "Holdtime 1 second, interval depends on multiplier\n"
       "Specify hello-interval for level-2 IIHs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->hello_interval[1] = DEFAULT_HELLO_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (isis_hello_multiplier,
       isis_hello_multiplier_cmd,
       "isis hello-multiplier (2-100)",
       "IS-IS commands\n"
       "Set multiplier for Hello holding time\n"
       "Hello multiplier value\n")
{
  int idx_number = 2;
  int mult;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  mult = atoi (argv[idx_number]->arg);
  if (mult < MIN_HELLO_MULTIPLIER || mult > MAX_HELLO_MULTIPLIER)
    {
      vty_out (vty, "Invalid hello-multiplier %d - should be <2-100>%s",
               mult, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->hello_multiplier[0] = (u_int16_t) mult;
  circuit->hello_multiplier[1] = (u_int16_t) mult;

  return CMD_SUCCESS;
}


DEFUN (no_isis_hello_multiplier,
       no_isis_hello_multiplier_cmd,
       "no isis hello-multiplier [(2-100)]",
       NO_STR
       "IS-IS commands\n"
       "Set multiplier for Hello holding time\n"
       "Hello multiplier value\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->hello_multiplier[0] = DEFAULT_HELLO_MULTIPLIER;
  circuit->hello_multiplier[1] = DEFAULT_HELLO_MULTIPLIER;

  return CMD_SUCCESS;
}


DEFUN (isis_hello_multiplier_l1,
       isis_hello_multiplier_l1_cmd,
       "isis hello-multiplier (2-100) level-1",
       "IS-IS commands\n"
       "Set multiplier for Hello holding time\n"
       "Hello multiplier value\n"
       "Specify hello multiplier for level-1 IIHs\n")
{
  int idx_number = 2;
  int mult;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  mult = atoi (argv[idx_number]->arg);
  if (mult < MIN_HELLO_MULTIPLIER || mult > MAX_HELLO_MULTIPLIER)
    {
      vty_out (vty, "Invalid hello-multiplier %d - should be <2-100>%s",
               mult, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->hello_multiplier[0] = (u_int16_t) mult;

  return CMD_SUCCESS;
}


DEFUN (no_isis_hello_multiplier_l1,
       no_isis_hello_multiplier_l1_cmd,
       "no isis hello-multiplier [(2-100)] level-1",
       NO_STR
       "IS-IS commands\n"
       "Set multiplier for Hello holding time\n"
       "Hello multiplier value\n"
       "Specify hello multiplier for level-1 IIHs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->hello_multiplier[0] = DEFAULT_HELLO_MULTIPLIER;

  return CMD_SUCCESS;
}


DEFUN (isis_hello_multiplier_l2,
       isis_hello_multiplier_l2_cmd,
       "isis hello-multiplier (2-100) level-2",
       "IS-IS commands\n"
       "Set multiplier for Hello holding time\n"
       "Hello multiplier value\n"
       "Specify hello multiplier for level-2 IIHs\n")
{
  int idx_number = 2;
  int mult;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  mult = atoi (argv[idx_number]->arg);
  if (mult < MIN_HELLO_MULTIPLIER || mult > MAX_HELLO_MULTIPLIER)
    {
      vty_out (vty, "Invalid hello-multiplier %d - should be <2-100>%s",
               mult, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->hello_multiplier[1] = (u_int16_t) mult;

  return CMD_SUCCESS;
}


DEFUN (no_isis_hello_multiplier_l2,
       no_isis_hello_multiplier_l2_cmd,
       "no isis hello-multiplier [(2-100)] level-2",
       NO_STR
       "IS-IS commands\n"
       "Set multiplier for Hello holding time\n"
       "Hello multiplier value\n"
       "Specify hello multiplier for level-2 IIHs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->hello_multiplier[1] = DEFAULT_HELLO_MULTIPLIER;

  return CMD_SUCCESS;
}


DEFUN (isis_hello_padding,
       isis_hello_padding_cmd,
       "isis hello padding",
       "IS-IS commands\n"
       "Add padding to IS-IS hello packets\n"
       "Pad hello packets\n"
       "<cr>\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->pad_hellos = 1;

  return CMD_SUCCESS;
}

DEFUN (no_isis_hello_padding,
       no_isis_hello_padding_cmd,
       "no isis hello padding",
       NO_STR
       "IS-IS commands\n"
       "Add padding to IS-IS hello packets\n"
       "Pad hello packets\n"
       "<cr>\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->pad_hellos = 0;

  return CMD_SUCCESS;
}

DEFUN (csnp_interval,
       csnp_interval_cmd,
       "isis csnp-interval (1-600)",
       "IS-IS commands\n"
       "Set CSNP interval in seconds\n"
       "CSNP interval value\n")
{
  int idx_number = 2;
  unsigned long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atol (argv[idx_number]->arg);
  if (interval < MIN_CSNP_INTERVAL || interval > MAX_CSNP_INTERVAL)
    {
      vty_out (vty, "Invalid csnp-interval %lu - should be <1-600>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->csnp_interval[0] = (u_int16_t) interval;
  circuit->csnp_interval[1] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_csnp_interval,
       no_csnp_interval_cmd,
       "no isis csnp-interval [(1-600)]",
       NO_STR
       "IS-IS commands\n"
       "Set CSNP interval in seconds\n"
       "CSNP interval value\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->csnp_interval[0] = DEFAULT_CSNP_INTERVAL;
  circuit->csnp_interval[1] = DEFAULT_CSNP_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (csnp_interval_l1,
       csnp_interval_l1_cmd,
       "isis csnp-interval (1-600) level-1",
       "IS-IS commands\n"
       "Set CSNP interval in seconds\n"
       "CSNP interval value\n"
       "Specify interval for level-1 CSNPs\n")
{
  int idx_number = 2;
  unsigned long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atol (argv[idx_number]->arg);
  if (interval < MIN_CSNP_INTERVAL || interval > MAX_CSNP_INTERVAL)
    {
      vty_out (vty, "Invalid csnp-interval %lu - should be <1-600>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->csnp_interval[0] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_csnp_interval_l1,
       no_csnp_interval_l1_cmd,
       "no isis csnp-interval [(1-600)] level-1",
       NO_STR
       "IS-IS commands\n"
       "Set CSNP interval in seconds\n"
       "CSNP interval value\n"
       "Specify interval for level-1 CSNPs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->csnp_interval[0] = DEFAULT_CSNP_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (csnp_interval_l2,
       csnp_interval_l2_cmd,
       "isis csnp-interval (1-600) level-2",
       "IS-IS commands\n"
       "Set CSNP interval in seconds\n"
       "CSNP interval value\n"
       "Specify interval for level-2 CSNPs\n")
{
  int idx_number = 2;
  unsigned long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atol (argv[idx_number]->arg);
  if (interval < MIN_CSNP_INTERVAL || interval > MAX_CSNP_INTERVAL)
    {
      vty_out (vty, "Invalid csnp-interval %lu - should be <1-600>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->csnp_interval[1] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_csnp_interval_l2,
       no_csnp_interval_l2_cmd,
       "no isis csnp-interval [(1-600)] level-2",
       NO_STR
       "IS-IS commands\n"
       "Set CSNP interval in seconds\n"
       "CSNP interval value\n"
       "Specify interval for level-2 CSNPs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->csnp_interval[1] = DEFAULT_CSNP_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (psnp_interval,
       psnp_interval_cmd,
       "isis psnp-interval (1-120)",
       "IS-IS commands\n"
       "Set PSNP interval in seconds\n"
       "PSNP interval value\n")
{
  int idx_number = 2;
  unsigned long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atol (argv[idx_number]->arg);
  if (interval < MIN_PSNP_INTERVAL || interval > MAX_PSNP_INTERVAL)
    {
      vty_out (vty, "Invalid psnp-interval %lu - should be <1-120>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->psnp_interval[0] = (u_int16_t) interval;
  circuit->psnp_interval[1] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_psnp_interval,
       no_psnp_interval_cmd,
       "no isis psnp-interval [(1-120)]",
       NO_STR
       "IS-IS commands\n"
       "Set PSNP interval in seconds\n"
       "PSNP interval value\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->psnp_interval[0] = DEFAULT_PSNP_INTERVAL;
  circuit->psnp_interval[1] = DEFAULT_PSNP_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (psnp_interval_l1,
       psnp_interval_l1_cmd,
       "isis psnp-interval (1-120) level-1",
       "IS-IS commands\n"
       "Set PSNP interval in seconds\n"
       "PSNP interval value\n"
       "Specify interval for level-1 PSNPs\n")
{
  int idx_number = 2;
  unsigned long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atol (argv[idx_number]->arg);
  if (interval < MIN_PSNP_INTERVAL || interval > MAX_PSNP_INTERVAL)
    {
      vty_out (vty, "Invalid psnp-interval %lu - should be <1-120>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->psnp_interval[0] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_psnp_interval_l1,
       no_psnp_interval_l1_cmd,
       "no isis psnp-interval [(1-120)] level-1",
       NO_STR
       "IS-IS commands\n"
       "Set PSNP interval in seconds\n"
       "PSNP interval value\n"
       "Specify interval for level-1 PSNPs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->psnp_interval[0] = DEFAULT_PSNP_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (psnp_interval_l2,
       psnp_interval_l2_cmd,
       "isis psnp-interval (1-120) level-2",
       "IS-IS commands\n"
       "Set PSNP interval in seconds\n"
       "PSNP interval value\n"
       "Specify interval for level-2 PSNPs\n")
{
  int idx_number = 2;
  unsigned long interval;
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  interval = atol (argv[idx_number]->arg);
  if (interval < MIN_PSNP_INTERVAL || interval > MAX_PSNP_INTERVAL)
    {
      vty_out (vty, "Invalid psnp-interval %lu - should be <1-120>%s",
               interval, VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  circuit->psnp_interval[1] = (u_int16_t) interval;

  return CMD_SUCCESS;
}


DEFUN (no_psnp_interval_l2,
       no_psnp_interval_l2_cmd,
       "no isis psnp-interval [(1-120)] level-2",
       NO_STR
       "IS-IS commands\n"
       "Set PSNP interval in seconds\n"
       "PSNP interval value\n"
       "Specify interval for level-2 PSNPs\n")
{
  struct isis_circuit *circuit = isis_circuit_lookup (vty);
  if (!circuit)
    return CMD_ERR_NO_MATCH;

  circuit->psnp_interval[1] = DEFAULT_PSNP_INTERVAL;

  return CMD_SUCCESS;
}


static int
validate_metric_style_narrow (struct vty *vty, struct isis_area *area)
{
  struct isis_circuit *circuit;
  struct listnode *node;

  if (! vty)
    return CMD_ERR_AMBIGUOUS;

  if (! area)
    {
      vty_out (vty, "ISIS area is invalid%s", VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  for (ALL_LIST_ELEMENTS_RO (area->circuit_list, node, circuit))
    {
      if ((area->is_type & IS_LEVEL_1) &&
          (circuit->is_type & IS_LEVEL_1) &&
          (circuit->te_metric[0] > MAX_NARROW_LINK_METRIC))
        {
          vty_out (vty, "ISIS circuit %s metric is invalid%s",
                   circuit->interface->name, VTY_NEWLINE);
          return CMD_ERR_AMBIGUOUS;
        }
      if ((area->is_type & IS_LEVEL_2) &&
          (circuit->is_type & IS_LEVEL_2) &&
          (circuit->te_metric[1] > MAX_NARROW_LINK_METRIC))
        {
          vty_out (vty, "ISIS circuit %s metric is invalid%s",
                   circuit->interface->name, VTY_NEWLINE);
          return CMD_ERR_AMBIGUOUS;
        }
    }

  return CMD_SUCCESS;
}

DEFUN (metric_style,
       metric_style_cmd,
       "metric-style <narrow|transition|wide>",
       "Use old-style (ISO 10589) or new-style packet formats\n"
       "Use old style of TLVs with narrow metric\n"
       "Send and accept both styles of TLVs during transition\n"
       "Use new style of TLVs to carry wider metric\n")
{
  int idx_metric_style = 1;
  VTY_DECLVAR_CONTEXT (isis_area, area);
  int ret;

  if (strncmp (argv[idx_metric_style]->arg, "w", 1) == 0)
    {
      isis_area_metricstyle_set(area, false, true);
      return CMD_SUCCESS;
    }

  ret = validate_metric_style_narrow (vty, area);
  if (ret != CMD_SUCCESS)
    return ret;

  if (strncmp (argv[idx_metric_style]->arg, "t", 1) == 0)
    isis_area_metricstyle_set(area, true, true);
  else if (strncmp (argv[idx_metric_style]->arg, "n", 1) == 0)
    isis_area_metricstyle_set(area, true, false);
      return CMD_SUCCESS;

  return CMD_SUCCESS;
}

DEFUN (no_metric_style,
       no_metric_style_cmd,
       "no metric-style",
       NO_STR
       "Use old-style (ISO 10589) or new-style packet formats\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);
  int ret;

  ret = validate_metric_style_narrow (vty, area);
  if (ret != CMD_SUCCESS)
    return ret;

  isis_area_metricstyle_set(area, true, false);
  return CMD_SUCCESS;
}

DEFUN (set_overload_bit,
       set_overload_bit_cmd,
       "set-overload-bit",
       "Set overload bit to avoid any transit traffic\n"
       "Set overload bit\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  isis_area_overload_bit_set(area, true);
  return CMD_SUCCESS;
}

DEFUN (no_set_overload_bit,
       no_set_overload_bit_cmd,
       "no set-overload-bit",
       "Reset overload bit to accept transit traffic\n"
       "Reset overload bit\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  isis_area_overload_bit_set(area, false);
  return CMD_SUCCESS;
}

DEFUN (set_attached_bit,
       set_attached_bit_cmd,
       "set-attached-bit",
       "Set attached bit to identify as L1/L2 router for inter-area traffic\n"
       "Set attached bit\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  isis_area_attached_bit_set(area, true);
  return CMD_SUCCESS;
}

DEFUN (no_set_attached_bit,
       no_set_attached_bit_cmd,
       "no set-attached-bit",
       NO_STR
       "Reset attached bit\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  isis_area_attached_bit_set(area, false);
  return CMD_SUCCESS;
}

DEFUN (dynamic_hostname,
       dynamic_hostname_cmd,
       "hostname dynamic",
       "Dynamic hostname for IS-IS\n"
       "Dynamic hostname\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  isis_area_dynhostname_set(area, true);
  return CMD_SUCCESS;
}

DEFUN (no_dynamic_hostname,
       no_dynamic_hostname_cmd,
       "no hostname dynamic",
       NO_STR
       "Dynamic hostname for IS-IS\n"
       "Dynamic hostname\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  isis_area_dynhostname_set(area, false);
  return CMD_SUCCESS;
}

static int area_lsp_mtu_set(struct vty *vty, unsigned int lsp_mtu)
{
  VTY_DECLVAR_CONTEXT (isis_area, area);
  struct listnode *node;
  struct isis_circuit *circuit;

  for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit))
    {
      if(circuit->state != C_STATE_INIT && circuit->state != C_STATE_UP)
        continue;
      if(lsp_mtu > isis_circuit_pdu_size(circuit))
        {
          vty_out(vty, "ISIS area contains circuit %s, which has a maximum PDU size of %zu.%s",
                  circuit->interface->name, isis_circuit_pdu_size(circuit),
                  VTY_NEWLINE);
          return CMD_ERR_AMBIGUOUS;
        }
    }

  isis_area_lsp_mtu_set(area, lsp_mtu);
  return CMD_SUCCESS;
}

DEFUN (area_lsp_mtu,
       area_lsp_mtu_cmd,
       "lsp-mtu (128-4352)",
       "Configure the maximum size of generated LSPs\n"
       "Maximum size of generated LSPs\n")
{
  int idx_number = 1;
  unsigned int lsp_mtu;

  VTY_GET_INTEGER_RANGE("lsp-mtu", lsp_mtu, argv[idx_number]->arg, 128, 4352);

  return area_lsp_mtu_set(vty, lsp_mtu);
}


DEFUN (no_area_lsp_mtu,
       no_area_lsp_mtu_cmd,
       "no lsp-mtu [(128-4352)]",
       NO_STR
       "Configure the maximum size of generated LSPs\n"
       "Maximum size of generated LSPs\n")
{
  return area_lsp_mtu_set(vty, DEFAULT_LSP_MTU);
}


DEFUN (is_type,
       is_type_cmd,
       "is-type <level-1|level-1-2|level-2-only>",
       "IS Level for this routing process (OSI only)\n"
       "Act as a station router only\n"
       "Act as both a station router and an area router\n"
       "Act as an area router only\n")
{
  int idx_level = 1;
  VTY_DECLVAR_CONTEXT (isis_area, area);
  int type;

  type = string2circuit_t (argv[idx_level]->arg);
  if (!type)
    {
      vty_out (vty, "Unknown IS level %s", VTY_NEWLINE);
      return CMD_SUCCESS;
    }

  isis_area_is_type_set(area, type);

  return CMD_SUCCESS;
}

DEFUN (no_is_type,
       no_is_type_cmd,
       "no is-type <level-1|level-1-2|level-2-only>",
       NO_STR
       "IS Level for this routing process (OSI only)\n"
       "Act as a station router only\n"
       "Act as both a station router and an area router\n"
       "Act as an area router only\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);
  int type;

  /*
   * Put the is-type back to defaults:
   * - level-1-2 on first area
   * - level-1 for the rest
   */
  if (listgetdata (listhead (isis->area_list)) == area)
    type = IS_LEVEL_1_AND_2;
  else
    type = IS_LEVEL_1;

  isis_area_is_type_set(area, type);

  return CMD_SUCCESS;
}

static int
set_lsp_gen_interval (struct vty *vty, struct isis_area *area,
                      uint16_t interval, int level)
{
  int lvl;

  for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; ++lvl)
    {
      if (!(lvl & level))
        continue;

      if (interval >= area->lsp_refresh[lvl-1])
        {
          vty_out (vty, "LSP gen interval %us must be less than "
                   "the LSP refresh interval %us%s",
                   interval, area->lsp_refresh[lvl-1], VTY_NEWLINE);
          return CMD_ERR_AMBIGUOUS;
        }
    }

  for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; ++lvl)
    {
      if (!(lvl & level))
        continue;
      area->lsp_gen_interval[lvl-1] = interval;
    }

  return CMD_SUCCESS;
}

DEFUN (lsp_gen_interval,
       lsp_gen_interval_cmd,
       "lsp-gen-interval [<level-1|level-2>] (1-120)",
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 1 only\n"
       "Set interval for level 2 only\n"
       "Minimum interval in seconds\n")
{
  int idx = 0;
  VTY_DECLVAR_CONTEXT (isis_area, area);
  uint16_t interval;
  int level;

  level = 0;
  level |= argv_find (argv, argc, "level-1", &idx) ? IS_LEVEL_1 : 0;
  level |= argv_find (argv, argc, "level-2", &idx) ? IS_LEVEL_2 : 0;
  if (!level)
    level = IS_LEVEL_1 | IS_LEVEL_2;

  argv_find (argv, argc, "(1-120)", &idx);

  interval = atoi (argv[idx]->arg);
  return set_lsp_gen_interval (vty, area, interval, level);
}

DEFUN (no_lsp_gen_interval,
       no_lsp_gen_interval_cmd,
       "no lsp-gen-interval [<level-1|level-2>] [(1-120)]",
       NO_STR
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 1 only\n"
       "Set interval for level 2 only\n"
       "Minimum interval in seconds\n")
{
  int idx = 0;
  VTY_DECLVAR_CONTEXT (isis_area, area);
  uint16_t interval;
  int level;

  level = 0;
  level |= argv_find (argv, argc, "level-1", &idx) ? IS_LEVEL_1 : 0;
  level |= argv_find (argv, argc, "level-2", &idx) ? IS_LEVEL_2 : 0;
  if (!level)
    level = IS_LEVEL_1 | IS_LEVEL_2;

  interval = DEFAULT_MIN_LSP_GEN_INTERVAL;
  return set_lsp_gen_interval (vty, area, interval, level);
}

DEFUN (spf_interval,
       spf_interval_cmd,
       "spf-interval (1-120)",
       "Minimum interval between SPF calculations\n"
       "Minimum interval between consecutive SPFs in seconds\n")
{
  int idx_number = 1;
  VTY_DECLVAR_CONTEXT (isis_area, area);
  u_int16_t interval;

  interval = atoi (argv[idx_number]->arg);
  area->min_spf_interval[0] = interval;
  area->min_spf_interval[1] = interval;

  return CMD_SUCCESS;
}


DEFUN (no_spf_interval,
       no_spf_interval_cmd,
       "no spf-interval [[<level-1|level-2>] (1-120)]",
       NO_STR
       "Minimum interval between SPF calculations\n"
       "Set interval for level 1 only\n"
       "Set interval for level 2 only\n"
       "Minimum interval between consecutive SPFs in seconds\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  area->min_spf_interval[0] = MINIMUM_SPF_INTERVAL;
  area->min_spf_interval[1] = MINIMUM_SPF_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (spf_interval_l1,
       spf_interval_l1_cmd,
       "spf-interval level-1 (1-120)",
       "Minimum interval between SPF calculations\n"
       "Set interval for level 1 only\n"
       "Minimum interval between consecutive SPFs in seconds\n")
{
  int idx_number = 2;
  VTY_DECLVAR_CONTEXT (isis_area, area);
  u_int16_t interval;

  interval = atoi (argv[idx_number]->arg);
  area->min_spf_interval[0] = interval;

  return CMD_SUCCESS;
}

DEFUN (no_spf_interval_l1,
       no_spf_interval_l1_cmd,
       "no spf-interval level-1",
       NO_STR
       "Minimum interval between SPF calculations\n"
       "Set interval for level 1 only\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  area->min_spf_interval[0] = MINIMUM_SPF_INTERVAL;

  return CMD_SUCCESS;
}


DEFUN (spf_interval_l2,
       spf_interval_l2_cmd,
       "spf-interval level-2 (1-120)",
       "Minimum interval between SPF calculations\n"
       "Set interval for level 2 only\n"
       "Minimum interval between consecutive SPFs in seconds\n")
{
  int idx_number = 2;
  VTY_DECLVAR_CONTEXT (isis_area, area);
  u_int16_t interval;

  interval = atoi (argv[idx_number]->arg);
  area->min_spf_interval[1] = interval;

  return CMD_SUCCESS;
}

DEFUN (no_spf_interval_l2,
       no_spf_interval_l2_cmd,
       "no spf-interval level-2",
       NO_STR
       "Minimum interval between SPF calculations\n"
       "Set interval for level 2 only\n")
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  area->min_spf_interval[1] = MINIMUM_SPF_INTERVAL;

  return CMD_SUCCESS;
}


static int
area_max_lsp_lifetime_set(struct vty *vty, int level,
			  uint16_t interval)
{
  VTY_DECLVAR_CONTEXT (isis_area, area);
  int lvl;
  uint16_t refresh_interval = interval - 300;
  int set_refresh_interval[ISIS_LEVELS] = {0, 0};

  for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++)
    {
      if (!(lvl & level))
        continue;

      if (refresh_interval < area->lsp_refresh[lvl-1])
        {
          vty_out (vty, "Level %d Max LSP lifetime %us must be 300s greater than "
                   "the configured LSP refresh interval %us%s",
                   lvl, interval, area->lsp_refresh[lvl-1], VTY_NEWLINE);
          vty_out (vty, "Automatically reducing level %d LSP refresh interval "
                   "to %us%s", lvl, refresh_interval, VTY_NEWLINE);
          set_refresh_interval[lvl-1] = 1;

          if (refresh_interval <= area->lsp_gen_interval[lvl-1])
            {
              vty_out (vty, "LSP refresh interval %us must be greater than "
                       "the configured LSP gen interval %us%s",
                       refresh_interval, area->lsp_gen_interval[lvl-1],
                       VTY_NEWLINE);
              return CMD_ERR_AMBIGUOUS;
            }
        }
    }

  for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; lvl++)
    {
      if (!(lvl & level))
        continue;
      isis_area_max_lsp_lifetime_set(area, lvl, interval);
      if (set_refresh_interval[lvl-1])
        isis_area_lsp_refresh_set(area, lvl, refresh_interval);
    }

  return CMD_SUCCESS;
}

DEFUN (max_lsp_lifetime,
       max_lsp_lifetime_cmd,
       "max-lsp-lifetime [<level-1|level-2>] (350-65535)",
       "Maximum LSP lifetime\n"
       "Maximum LSP lifetime for Level 1 only\n"
       "Maximum LSP lifetime for Level 2 only\n"
       "LSP lifetime in seconds\n")
{
  int idx = 0;
  unsigned int level = IS_LEVEL_1_AND_2;

  if (argv_find (argv, argc, "level-1", &idx))
    level = IS_LEVEL_1;
  else if (argv_find (argv, argc, "level-2", &idx))
    level = IS_LEVEL_2;

  argv_find (argv, argc, "(350-65535)", &idx);
  int lifetime = atoi(argv[idx]->arg);

  return area_max_lsp_lifetime_set(vty, level, lifetime);
}


DEFUN (no_max_lsp_lifetime,
       no_max_lsp_lifetime_cmd,
       "no max-lsp-lifetime [<level-1|level-2>] [(350-65535)]",
       NO_STR
       "Maximum LSP lifetime\n"
       "Maximum LSP lifetime for Level 1 only\n"
       "Maximum LSP lifetime for Level 2 only\n"
       "LSP lifetime in seconds\n")
{
  int idx = 0;
  unsigned int level = IS_LEVEL_1_AND_2;

  if (argv_find (argv, argc, "level-1", &idx))
    level = IS_LEVEL_1;
  else if (argv_find (argv, argc, "level-2", &idx))
    level = IS_LEVEL_2;

  return area_max_lsp_lifetime_set(vty, level, DEFAULT_LSP_LIFETIME);
}

static int
area_lsp_refresh_interval_set(struct vty *vty, int level, uint16_t interval)
{
  VTY_DECLVAR_CONTEXT (isis_area, area);
  int lvl;

  for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; ++lvl)
    {
      if (!(lvl & level))
        continue;
      if (interval <= area->lsp_gen_interval[lvl-1])
        {
          vty_out (vty, "LSP refresh interval %us must be greater than "
                   "the configured LSP gen interval %us%s",
                   interval, area->lsp_gen_interval[lvl-1],
                   VTY_NEWLINE);
          return CMD_ERR_AMBIGUOUS;
        }
      if (interval > (area->max_lsp_lifetime[lvl-1] - 300))
        {
          vty_out (vty, "LSP refresh interval %us must be less than "
                   "the configured LSP lifetime %us less 300%s",
                   interval, area->max_lsp_lifetime[lvl-1],
                   VTY_NEWLINE);
          return CMD_ERR_AMBIGUOUS;
        }
    }

  for (lvl = IS_LEVEL_1; lvl <= IS_LEVEL_2; ++lvl)
    {
      if (!(lvl & level))
        continue;
      isis_area_lsp_refresh_set(area, lvl, interval);
    }

  return CMD_SUCCESS;
}

DEFUN (lsp_refresh_interval,
       lsp_refresh_interval_cmd,
       "lsp-refresh-interval [<level-1|level-2>] (1-65235)",
       "LSP refresh interval\n"
       "LSP refresh interval for Level 1 only\n"
       "LSP refresh interval for Level 2 only\n"
       "LSP refresh interval in seconds\n")
{
  int idx = 0;
  unsigned int level = IS_LEVEL_1_AND_2;
  unsigned int interval = 0;

  if (argv_find (argv, argc, "level-1", &idx))
    level = IS_LEVEL_1;
  else if (argv_find (argv, argc, "level-2", &idx))
    level = IS_LEVEL_2;

  interval = atoi(argv[argc-1]->arg);
  return area_lsp_refresh_interval_set(vty, level, interval);
}

DEFUN (no_lsp_refresh_interval,
       no_lsp_refresh_interval_cmd,
       "no lsp-refresh-interval [<level-1|level-2>] [(1-65235)]",
       NO_STR
       "LSP refresh interval\n"
       "LSP refresh interval for Level 1 only\n"
       "LSP refresh interval for Level 2 only\n"
       "LSP refresh interval in seconds\n")
{
  int idx = 0;
  unsigned int level = IS_LEVEL_1_AND_2;

  if (argv_find (argv, argc, "level-1", &idx))
    level = IS_LEVEL_1;
  else if (argv_find (argv, argc, "level-2", &idx))
    level = IS_LEVEL_2;

  return area_lsp_refresh_interval_set(vty, level, DEFAULT_MAX_LSP_GEN_INTERVAL);
}

static int
area_passwd_set(struct vty *vty, int level,
                int (*type_set)(struct isis_area *area, int level,
                                const char *passwd, u_char snp_auth),
                const char *passwd, u_char snp_auth)
{
  VTY_DECLVAR_CONTEXT (isis_area, area);

  if (passwd && strlen(passwd) > 254)
    {
      vty_out (vty, "Too long area password (>254)%s", VTY_NEWLINE);
      return CMD_ERR_AMBIGUOUS;
    }

  type_set(area, level, passwd, snp_auth);
  return CMD_SUCCESS;
}


DEFUN (area_passwd_md5,
       area_passwd_md5_cmd,
       "area-password md5 WORD [authenticate snp <send-only|validate>]",
       "Configure the authentication password for an area\n"
       "Authentication type\n"
       "Level-wide password\n"
       "Authentication\n"
       "SNP PDUs\n"
       "Send but do not check PDUs on receiving\n"
       "Send and check PDUs on receiving\n")
{
  int idx_password = 0;
  int idx_word = 2;
  int idx_type = 5;
  u_char snp_auth = 0;
  int level = strmatch(argv[idx_password]->text, "domain-password") ? IS_LEVEL_2 : IS_LEVEL_1;

  if (argc > 3)
    {
      snp_auth = SNP_AUTH_SEND;
      if (strmatch(argv[idx_type]->text, "validate"))
        snp_auth |= SNP_AUTH_RECV;
    }

  return area_passwd_set(vty, level, isis_area_passwd_hmac_md5_set,
                         argv[idx_word]->arg, snp_auth);
}

DEFUN (domain_passwd_md5,
       domain_passwd_md5_cmd,
       "domain-password md5 WORD [authenticate snp <send-only|validate>]",
       "Set the authentication password for a routing domain\n"
       "Authentication type\n"
       "Level-wide password\n"
       "Authentication\n"
       "SNP PDUs\n"
       "Send but do not check PDUs on receiving\n"
       "Send and check PDUs on receiving\n")
{
  return area_passwd_md5 (self, vty, argc, argv);
}

DEFUN (area_passwd_clear,
       area_passwd_clear_cmd,
       "area-password clear WORD [authenticate snp <send-only|validate>]",
       "Configure the authentication password for an area\n"
       "Authentication type\n"
       "Area password\n"
       "Authentication\n"
       "SNP PDUs\n"
       "Send but do not check PDUs on receiving\n"
       "Send and check PDUs on receiving\n")
{
  int idx_password = 0;
  int idx_word = 2;
  int idx_type = 5;
  u_char snp_auth = 0;
  int level = strmatch(argv[idx_password]->text, "domain-password") ? IS_LEVEL_2 : IS_LEVEL_1;

  if (argc > 3)
    {
      snp_auth = SNP_AUTH_SEND;
      if (strmatch (argv[idx_type]->text, "validate"))
        snp_auth |= SNP_AUTH_RECV;
    }

  return area_passwd_set(vty, level, isis_area_passwd_cleartext_set,
                         argv[idx_word]->arg, snp_auth);
}

DEFUN (domain_passwd_clear,
       domain_passwd_clear_cmd,
       "domain-password clear WORD [authenticate snp <send-only|validate>]",
       "Set the authentication password for a routing domain\n"
       "Authentication type\n"
       "Area password\n"
       "Authentication\n"
       "SNP PDUs\n"
       "Send but do not check PDUs on receiving\n"
       "Send and check PDUs on receiving\n")
{
  return area_passwd_clear (self, vty, argc, argv);
}

DEFUN (no_area_passwd,
       no_area_passwd_cmd,
       "no <area-password|domain-password>",
       NO_STR
       "Configure the authentication password for an area\n"
       "Set the authentication password for a routing domain\n")
{
  int idx_password = 1;
  int level = strmatch (argv[idx_password]->text, "domain-password") ? IS_LEVEL_2 : IS_LEVEL_1;
  VTY_DECLVAR_CONTEXT (isis_area, area);

  return isis_area_passwd_unset (area, level);
}

void
isis_vty_init (void)
{
  install_element (INTERFACE_NODE, &ip_router_isis_cmd);
  install_element (INTERFACE_NODE, &ip6_router_isis_cmd);
  install_element (INTERFACE_NODE, &no_ip_router_isis_cmd);

  install_element (INTERFACE_NODE, &isis_passive_cmd);
  install_element (INTERFACE_NODE, &no_isis_passive_cmd);

  install_element (INTERFACE_NODE, &isis_circuit_type_cmd);
  install_element (INTERFACE_NODE, &no_isis_circuit_type_cmd);

  install_element (INTERFACE_NODE, &isis_network_cmd);
  install_element (INTERFACE_NODE, &no_isis_network_cmd);

  install_element (INTERFACE_NODE, &isis_passwd_cmd);
  install_element (INTERFACE_NODE, &no_isis_passwd_cmd);

  install_element (INTERFACE_NODE, &isis_priority_cmd);
  install_element (INTERFACE_NODE, &no_isis_priority_cmd);
  install_element (INTERFACE_NODE, &isis_priority_l1_cmd);
  install_element (INTERFACE_NODE, &no_isis_priority_l1_cmd);
  install_element (INTERFACE_NODE, &isis_priority_l2_cmd);
  install_element (INTERFACE_NODE, &no_isis_priority_l2_cmd);

  install_element (INTERFACE_NODE, &isis_metric_cmd);
  install_element (INTERFACE_NODE, &no_isis_metric_cmd);
  install_element (INTERFACE_NODE, &isis_metric_l1_cmd);
  install_element (INTERFACE_NODE, &no_isis_metric_l1_cmd);
  install_element (INTERFACE_NODE, &isis_metric_l2_cmd);
  install_element (INTERFACE_NODE, &no_isis_metric_l2_cmd);

  install_element (INTERFACE_NODE, &isis_hello_interval_cmd);
  install_element (INTERFACE_NODE, &no_isis_hello_interval_cmd);
  install_element (INTERFACE_NODE, &isis_hello_interval_l1_cmd);
  install_element (INTERFACE_NODE, &no_isis_hello_interval_l1_cmd);
  install_element (INTERFACE_NODE, &isis_hello_interval_l2_cmd);
  install_element (INTERFACE_NODE, &no_isis_hello_interval_l2_cmd);

  install_element (INTERFACE_NODE, &isis_hello_multiplier_cmd);
  install_element (INTERFACE_NODE, &no_isis_hello_multiplier_cmd);
  install_element (INTERFACE_NODE, &isis_hello_multiplier_l1_cmd);
  install_element (INTERFACE_NODE, &no_isis_hello_multiplier_l1_cmd);
  install_element (INTERFACE_NODE, &isis_hello_multiplier_l2_cmd);
  install_element (INTERFACE_NODE, &no_isis_hello_multiplier_l2_cmd);

  install_element (INTERFACE_NODE, &isis_hello_padding_cmd);
  install_element (INTERFACE_NODE, &no_isis_hello_padding_cmd);

  install_element (INTERFACE_NODE, &csnp_interval_cmd);
  install_element (INTERFACE_NODE, &no_csnp_interval_cmd);
  install_element (INTERFACE_NODE, &csnp_interval_l1_cmd);
  install_element (INTERFACE_NODE, &no_csnp_interval_l1_cmd);
  install_element (INTERFACE_NODE, &csnp_interval_l2_cmd);
  install_element (INTERFACE_NODE, &no_csnp_interval_l2_cmd);

  install_element (INTERFACE_NODE, &psnp_interval_cmd);
  install_element (INTERFACE_NODE, &no_psnp_interval_cmd);
  install_element (INTERFACE_NODE, &psnp_interval_l1_cmd);
  install_element (INTERFACE_NODE, &no_psnp_interval_l1_cmd);
  install_element (INTERFACE_NODE, &psnp_interval_l2_cmd);
  install_element (INTERFACE_NODE, &no_psnp_interval_l2_cmd);

  install_element (ISIS_NODE, &metric_style_cmd);
  install_element (ISIS_NODE, &no_metric_style_cmd);

  install_element (ISIS_NODE, &set_overload_bit_cmd);
  install_element (ISIS_NODE, &no_set_overload_bit_cmd);

  install_element (ISIS_NODE, &set_attached_bit_cmd);
  install_element (ISIS_NODE, &no_set_attached_bit_cmd);

  install_element (ISIS_NODE, &dynamic_hostname_cmd);
  install_element (ISIS_NODE, &no_dynamic_hostname_cmd);

  install_element (ISIS_NODE, &area_lsp_mtu_cmd);
  install_element (ISIS_NODE, &no_area_lsp_mtu_cmd);

  install_element (ISIS_NODE, &is_type_cmd);
  install_element (ISIS_NODE, &no_is_type_cmd);

  install_element (ISIS_NODE, &lsp_gen_interval_cmd);
  install_element (ISIS_NODE, &no_lsp_gen_interval_cmd);

  install_element (ISIS_NODE, &spf_interval_cmd);
  install_element (ISIS_NODE, &no_spf_interval_cmd);
  install_element (ISIS_NODE, &spf_interval_l1_cmd);
  install_element (ISIS_NODE, &no_spf_interval_l1_cmd);
  install_element (ISIS_NODE, &spf_interval_l2_cmd);
  install_element (ISIS_NODE, &no_spf_interval_l2_cmd);

  install_element (ISIS_NODE, &max_lsp_lifetime_cmd);
  install_element (ISIS_NODE, &no_max_lsp_lifetime_cmd);

  install_element (ISIS_NODE, &lsp_refresh_interval_cmd);
  install_element (ISIS_NODE, &no_lsp_refresh_interval_cmd);

  install_element (ISIS_NODE, &area_passwd_md5_cmd);
  install_element (ISIS_NODE, &area_passwd_clear_cmd);
  install_element (ISIS_NODE, &domain_passwd_md5_cmd);
  install_element (ISIS_NODE, &domain_passwd_clear_cmd);
  install_element (ISIS_NODE, &no_area_passwd_cmd);
}