/*
 * IS-IS Rout(e)ing protocol - isisd.c
 *
 * 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 <string.h>
#include <zebra.h>
#include <net/ethernet.h>

#include "thread.h"
#include "vty.h"
#include "command.h"
#include "log.h"
#include "memory.h"
#include "linklist.h"
#include "if.h"
#include "hash.h"
#include "stream.h"
#include "prefix.h"
#include "table.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_flags.h"
#include "isisd/isisd.h"
#include "isisd/isis_dynhn.h"
#include "isisd/isis_adjacency.h"
#include "isisd/isis_pdu.h"
#include "isisd/isis_misc.h"
#include "isisd/isis_constants.h"
#include "isisd/isis_tlv.h"
#include "isisd/isis_lsp.h"
#include "isisd/isis_spf.h"
#include "isisd/isis_route.h"
#include "isisd/isis_zebra.h"
#include "isisd/isis_events.h"

#ifdef TOPOLOGY_GENERATE
#include "spgrid.h"
u_char DEFAULT_TOPOLOGY_BASEIS[6] = {0xFE, 0xED, 0xFE, 0xED, 0x00, 0x00};
#endif /* TOPOLOGY_GENERATE */


struct isis *isis = NULL;
struct thread_master *master;


void
isis_new (unsigned long process_id)
{
  
  isis = XMALLOC (MTYPE_ISIS, sizeof(struct isis));
  bzero (isis, sizeof (struct isis));
  /*
   * Default values
   */
  isis->max_area_addrs = 3;

  isis->process_id = process_id;
  isis->area_list = list_new ();
  isis->init_circ_list = list_new ();
  isis->uptime = time (NULL);
  isis->nexthops = list_new ();
#ifdef HAVE_IPV6
  isis->nexthops6 = list_new ();
#endif /* HAVE_IPV6 */
  /*
   * uncomment the next line for full debugs
   */
   /* isis->debugs = 0xFFFF; */  
}

struct isis_area *
isis_area_create ()
{

  struct isis_area *area;
  
  area = XMALLOC (MTYPE_ISIS_AREA, sizeof (struct isis_area));
  memset (area, 0, sizeof (struct isis_area));

  /*
   * The first instance is level-1-2 rest are level-1, unless otherwise
   * configured
   */
  if (listcount (isis->area_list) > 0)
    area->is_type = IS_LEVEL_1;
  else
    area->is_type = IS_LEVEL_1_AND_2;
  /*
   * intialize the databases
   */
  area->lspdb[0] = lsp_db_init ();
  area->lspdb[1] = lsp_db_init ();
  
  spftree_area_init (area);
  area->route_table = route_table_init ();
#ifdef HAVE_IPV6
  area->route_table6 = route_table_init ();
#endif /* HAVE_IPV6 */
  area->circuit_list = list_new ();
  area->area_addrs = list_new ();
  area->t_tick = thread_add_timer (master, lsp_tick, area, 1);
  area->flags.maxindex = -1;
  /*
   * Default values
   */
  area->max_lsp_lifetime[0] = MAX_AGE; /* 1200 */
  area->max_lsp_lifetime[1] = MAX_AGE; /* 1200 */
  area->lsp_gen_interval[0] = LSP_GEN_INTERVAL_DEFAULT;
  area->lsp_gen_interval[1] = LSP_GEN_INTERVAL_DEFAULT;
  area->lsp_refresh[0] = MAX_LSP_GEN_INTERVAL; /* 900 */
  area->lsp_refresh[1] = MAX_LSP_GEN_INTERVAL; /* 900 */
  area->min_spf_interval[0] = MINIMUM_SPF_INTERVAL;
  area->min_spf_interval[1] = MINIMUM_SPF_INTERVAL;
  area->dynhostname = 1;
  area->lsp_frag_threshold = 90;
#ifdef TOPOLOGY_GENERATE
  memcpy (area->topology_baseis, DEFAULT_TOPOLOGY_BASEIS, ISIS_SYS_ID_LEN);
#endif /* TOPOLOGY_GENERATE */

  /* FIXME: Think of a better way... */
  area->min_bcast_mtu = 1497;

  return area;
}

struct isis_area *
isis_area_lookup (char *area_tag)
{
  struct isis_area *area;
  struct listnode *node;
  
  LIST_LOOP (isis->area_list, area, node)
    if ((area->area_tag == NULL && area_tag == NULL) ||
	(area->area_tag && area_tag && strcmp (area->area_tag, area_tag) == 0))
      return area;
  
  return NULL;
}

int 
isis_area_get (struct vty *vty, char *area_tag)
{

  struct isis_area *area;
  
  area = isis_area_lookup (area_tag);
  
  if (area) {
    vty->node = ISIS_NODE;
    vty->index = area;
    return CMD_SUCCESS;
  }
  
  area = isis_area_create ();
  area->area_tag = strdup (area_tag);
  listnode_add (isis->area_list, area);
  
  zlog_info ("new IS-IS area instance %s", area->area_tag);

  vty->node = ISIS_NODE;
  vty->index = area;
  
  return CMD_SUCCESS;
}

int
isis_area_destroy (struct vty *vty, char *area_tag)
{
  
  struct isis_area *area;
  struct listnode *node;
  struct isis_circuit *circuit;

  area = isis_area_lookup (area_tag);
  
  if (area == NULL) {
    vty_out (vty, "Can't find ISIS instance %s", VTY_NEWLINE);
    return CMD_WARNING;
  }

  if (area->circuit_list) {
    node = listhead (area->circuit_list);
    while (node) {
      circuit = getdata (node);
      nextnode (node);
      isis_circuit_del (circuit);
    }
    list_delete (area->circuit_list);
  }
  listnode_delete (isis->area_list, area);
  if (area->t_tick)
    thread_cancel (area->t_tick); 
  if (area->t_remove_aged)
    thread_cancel (area->t_remove_aged);
  if (area->t_lsp_refresh[0])
    thread_cancel (area->t_lsp_refresh[0]);
  if (area->t_lsp_refresh[1])
    thread_cancel (area->t_lsp_refresh[1]);

  XFREE (MTYPE_ISIS_AREA, area);
  
  return CMD_SUCCESS;
}

int 
area_net_title (struct vty *vty , char *net_title)
{
  
  struct isis_area *area;
  struct area_addr *addr;
  struct area_addr *addrp;
  struct listnode *node;

  u_char buff[255];
  area = vty->index;

  if (!area) {
    vty_out (vty, "Can't find ISIS instance %s", VTY_NEWLINE);
    return CMD_WARNING;
  }

  /* We check that we are not over the maximal number of addresses */
  if (listcount (area->area_addrs) >= isis->max_area_addrs) {
    vty_out (vty, "Maximum of area addresses (%d) already reached %s",
	     isis->max_area_addrs, VTY_NEWLINE);
    return CMD_WARNING;
  }

  addr = XMALLOC (MTYPE_ISIS_AREA_ADDR, sizeof (struct area_addr));
  addr->addr_len = dotformat2buff (buff, net_title);
  memcpy (addr->area_addr, buff, addr->addr_len);
#ifdef EXTREME_DEBUG
  zlog_info ("added area address %s for area %s (address length %d)", 
	     net_title, area->area_tag, addr->addr_len);
#endif /* EXTREME_DEBUG */
  if (addr->addr_len < 8 || addr->addr_len > 20) {
    zlog_warn ("area address must be at least 8..20 octets long (%d)",
	       addr->addr_len);
    XFREE (MTYPE_ISIS_AREA_ADDR, addr);
    return CMD_WARNING;
  }

  if (isis->sysid_set == 0) {
    /*
     * First area address - get the SystemID for this router
     */
    memcpy (isis->sysid, GETSYSID(addr, ISIS_SYS_ID_LEN), ISIS_SYS_ID_LEN);
    isis->sysid_set = 1;
    zlog_info ("Router has SystemID %s", sysid_print (isis->sysid));
  } else {
    /*
     * Check that the SystemID portions match
     */
    if (memcmp (isis->sysid, GETSYSID(addr, ISIS_SYS_ID_LEN),
		 ISIS_SYS_ID_LEN)) {
      vty_out (vty, "System ID must not change when defining additional area"
               " addresses%s", VTY_NEWLINE);
      XFREE (MTYPE_ISIS_AREA_ADDR, addr);
      return CMD_WARNING;
    }

    /* now we see that we don't already have this address */
    LIST_LOOP (area->area_addrs, addrp, node) {
      if ((addrp->addr_len+ ISIS_SYS_ID_LEN + 1) == (addr->addr_len)) {
         if (!memcmp (addrp->area_addr, addr->area_addr,addr->addr_len)) {
          XFREE (MTYPE_ISIS_AREA_ADDR, addr);
          return CMD_SUCCESS; /* silent fail */
        }
      }
    }

  }
  /*
   * Forget the systemID part of the address
   */
  addr->addr_len -= (ISIS_SYS_ID_LEN + 1);
  listnode_add (area->area_addrs, addr);

  /* only now we can safely generate our LSPs for this area */
  if (listcount(area->area_addrs) > 0) {
    lsp_l1_generate (area);
    lsp_l2_generate (area);
  }

  return CMD_SUCCESS;
}

int
area_clear_net_title (struct vty *vty, char *net_title)
{
  struct isis_area *area;
  struct area_addr  addr, *addrp = NULL;
  struct listnode *node;
  u_char buff[255];

  area = vty->index;
  if (!area) {
    vty_out (vty, "Can't find ISIS instance %s", VTY_NEWLINE);
    return CMD_WARNING;
  }
  
  addr.addr_len = dotformat2buff (buff, net_title);
  if (addr.addr_len < 8 || addr.addr_len > 20) {
    vty_out (vty, "Unsupported area address length %d, should be 8...20 %s", 
	     addr.addr_len, VTY_NEWLINE);
    return CMD_WARNING;
  }
  
  memcpy(addr.area_addr, buff, (int)addr.addr_len); 
  
  LIST_LOOP (area->area_addrs, addrp, node)
    if (addrp->addr_len == addr.addr_len &&
	!memcmp (addrp->area_addr, addr.area_addr, addr.addr_len))
      break;
  
  if (!addrp) {
    vty_out (vty, "No area address %s for area %s %s", net_title, 
	     area->area_tag, VTY_NEWLINE);
    return CMD_WARNING;
  }
  
  listnode_delete (area->area_addrs, addrp);
  
  return CMD_SUCCESS;
}


/*
 * 'show clns neighbors' command
 */

int
show_clns_neigh (struct vty *vty, char detail) 
{
  struct listnode *node_area, *node_circ;
  struct isis_area *area;
  struct isis_circuit *circuit;
  struct list *db;
  int i;

  if (!isis) {
    vty_out (vty, "IS-IS Routing Process not enabled%s", VTY_NEWLINE);
    return CMD_SUCCESS;
  }

  for (node_area = listhead (isis->area_list); node_area;
       nextnode (node_area)) {
    area = getdata (node_area);
    vty_out (vty, "Area %s:%s", area->area_tag, VTY_NEWLINE);

    if (detail==ISIS_UI_LEVEL_BRIEF)
      vty_out (vty, "  System Id           Interface   L  State        "
               "Holdtime SNPA%s", VTY_NEWLINE);

    for (node_circ = listhead (area->circuit_list); node_circ;
         nextnode (node_circ)) {
      circuit = getdata (node_circ);      
      if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
        for (i = 0; i < 2; i++) {
          db = circuit->u.bc.adjdb[i];
          if (db && db->count) {
            if (detail == ISIS_UI_LEVEL_BRIEF)
              isis_adjdb_iterate (db, (void (*) (struct isis_adjacency *, 
                                                 void *))
                                  isis_adj_print_vty, vty);	  
            if (detail == ISIS_UI_LEVEL_DETAIL)
              isis_adjdb_iterate (db, (void (*) (struct isis_adjacency *, 
                                                 void *))
                                  isis_adj_print_vty_detail, vty);	  
            if (detail == ISIS_UI_LEVEL_EXTENSIVE)
              isis_adjdb_iterate (db, (void (*) (struct isis_adjacency *, 
                                                  void *))
                                   isis_adj_print_vty_extensive, vty);	  
          }
        }
      } else if (circuit->circ_type == CIRCUIT_T_P2P && 
                 circuit->u.p2p.neighbor) {
        if (detail==ISIS_UI_LEVEL_BRIEF)
	  isis_adj_p2p_print_vty (circuit->u.p2p.neighbor, vty);
	if (detail==ISIS_UI_LEVEL_DETAIL)
          isis_adj_p2p_print_vty_detail (circuit->u.p2p.neighbor, vty);
        if (detail==ISIS_UI_LEVEL_EXTENSIVE)
          isis_adj_p2p_print_vty_extensive (circuit->u.p2p.neighbor, vty);
      }     
    }
  }
  
  return CMD_SUCCESS;
}

DEFUN (show_clns_neighbors,
       show_clns_neighbors_cmd,
       "show clns neighbors",
       SHOW_STR
       "clns network information\n"
       "CLNS neighbor adjacencies\n")
{
  return show_clns_neigh(vty, ISIS_UI_LEVEL_BRIEF);
}

ALIAS (show_clns_neighbors,
       show_isis_neighbors_cmd,
       "show isis neighbors",
       SHOW_STR
       "IS-IS network information\n"
       "IS-IS neighbor adjacencies\n")

DEFUN (show_clns_neighbors_detail,
       show_clns_neighbors_detail_cmd,
       "show clns neighbors detail",
       SHOW_STR
       "clns network information\n"
       "CLNS neighbor adjacencies\n"
       "show detailed information\n")
{
  return show_clns_neigh(vty, ISIS_UI_LEVEL_DETAIL);
}

ALIAS (show_clns_neighbors_detail,
       show_isis_neighbors_detail_cmd,
       "show isis neighbors detail",
       SHOW_STR
       "IS-IS network information\n"
       "IS-IS neighbor adjacencies\n"
       "show detailed information\n")

/*
 * 'isis debug', 'show debugging'
 */

void
print_debug (struct vty *vty, int flags, int onoff)
{
  char onoffs[4];
  if (onoff)
    strcpy (onoffs,"on");
  else
    strcpy (onoffs,"off");

  if (flags & DEBUG_ADJ_PACKETS)
    vty_out (vty,"IS-IS Adjacency related packets debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_CHECKSUM_ERRORS)
    vty_out (vty,"IS-IS checksum errors debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_LOCAL_UPDATES)
    vty_out (vty,"IS-IS local updates debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_PROTOCOL_ERRORS)
    vty_out (vty,"IS-IS protocol errors debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_SNP_PACKETS)
    vty_out (vty,"IS-IS CSNP/PSNP packets debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_SPF_EVENTS)
    vty_out (vty,"IS-IS SPF events debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_SPF_STATS)
    vty_out (vty,"IS-IS SPF Timing and Statistics Data debugging is %s%s", 
             onoffs, VTY_NEWLINE);
  if (flags & DEBUG_SPF_TRIGGERS)
    vty_out (vty,"IS-IS SPF triggering events debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_UPDATE_PACKETS)
    vty_out (vty,"IS-IS Update related packet debugging is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_RTE_EVENTS)
    vty_out (vty,"IS-IS Route related debuggin is %s%s", onoffs, 
             VTY_NEWLINE);
  if (flags & DEBUG_EVENTS)
    vty_out (vty,"IS-IS Event debugging is %s%s", onoffs, 
             VTY_NEWLINE);

}

DEFUN (show_debugging,
       show_debugging_cmd,
       "show debugging",
       SHOW_STR
       "State of each debugging option\n")
{
  vty_out (vty,"IS-IS:%s", VTY_NEWLINE);
  print_debug (vty, isis->debugs, 1);
  return CMD_SUCCESS;
}

/* Debug node. */
static struct cmd_node debug_node =
{
  DEBUG_NODE,
 "",
 1
};

static int
config_write_debug (struct vty *vty)
{
  int write = 0;
  int flags = isis->debugs;

  if (flags & DEBUG_ADJ_PACKETS) {
    vty_out (vty, "debug isis adj-packets%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_CHECKSUM_ERRORS) {
    vty_out (vty, "debug isis checksum-errors%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_LOCAL_UPDATES) {
    vty_out (vty, "debug isis local-updates%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_PROTOCOL_ERRORS) {
    vty_out (vty, "debug isis protocol-errors%s",  
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_SNP_PACKETS) {
    vty_out (vty, "debug isis snp-packets%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_SPF_EVENTS) {
    vty_out (vty, "debug isis spf-events%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_SPF_STATS) {
    vty_out (vty, "debug isis spf-statistics%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_SPF_TRIGGERS) {
    vty_out (vty, "debug isis spf-triggers%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_UPDATE_PACKETS) {
    vty_out (vty, "debug isis update-packets%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_RTE_EVENTS) {
    vty_out (vty, "debug isis route-events%s",
             VTY_NEWLINE);
    write++;
  }
  if (flags & DEBUG_EVENTS) {
    vty_out (vty, "debug isis events%s",
             VTY_NEWLINE);
    write++;
  }

  return write;
}

DEFUN (debug_isis_adj,
       debug_isis_adj_cmd,
       "debug isis adj-packets",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS Adjacency related packets\n"
       )
{
  isis->debugs |= DEBUG_ADJ_PACKETS;
  print_debug (vty,DEBUG_ADJ_PACKETS,1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_adj,
       no_debug_isis_adj_cmd,
       "no debug isis adj-packets",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS Adjacency related packets\n"
       )
{

  isis->debugs &= ~DEBUG_ADJ_PACKETS;
  print_debug (vty, DEBUG_ADJ_PACKETS, 0);

  return CMD_SUCCESS;
}


DEFUN (debug_isis_csum,
       debug_isis_csum_cmd,
       "debug isis checksum-errors",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS LSP checksum errors\n"
       )
{
  isis->debugs |= DEBUG_CHECKSUM_ERRORS;
  print_debug (vty, DEBUG_CHECKSUM_ERRORS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_csum,
       no_debug_isis_csum_cmd,
       "no debug isis checksum-errors",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS LSP checksum errors\n"
       )
{
  isis->debugs &= ~DEBUG_CHECKSUM_ERRORS;
  print_debug (vty, DEBUG_CHECKSUM_ERRORS, 0);
  
  return CMD_SUCCESS;
}

DEFUN (debug_isis_lupd,
       debug_isis_lupd_cmd,
       "debug isis local-updates",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS local update packets\n"
       )
{
  isis->debugs |= DEBUG_LOCAL_UPDATES;
  print_debug (vty, DEBUG_LOCAL_UPDATES, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_lupd,
       no_debug_isis_lupd_cmd,
       "no debug isis local-updates",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS local update packets\n"
       )
{
  isis->debugs &= ~DEBUG_LOCAL_UPDATES;
  print_debug (vty, DEBUG_LOCAL_UPDATES , 0);
  
  return CMD_SUCCESS;
}

DEFUN (debug_isis_err,
       debug_isis_err_cmd,
       "debug isis protocol-errors",  
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS LSP protocol errors\n"
       )
{
  isis->debugs |= DEBUG_PROTOCOL_ERRORS;
  print_debug (vty, DEBUG_PROTOCOL_ERRORS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_err,
       no_debug_isis_err_cmd,
       "no debug isis protocol-errors",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS LSP protocol errors\n"
       )
{
  isis->debugs &= ~DEBUG_PROTOCOL_ERRORS;
  print_debug (vty, DEBUG_PROTOCOL_ERRORS, 0);
  
  return CMD_SUCCESS;
}

DEFUN (debug_isis_snp,
       debug_isis_snp_cmd,
       "debug isis snp-packets",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS CSNP/PSNP packets\n"
       )
{
  isis->debugs |= DEBUG_SNP_PACKETS;
  print_debug (vty, DEBUG_SNP_PACKETS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_snp,
       no_debug_isis_snp_cmd,
       "no debug isis snp-packets",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS CSNP/PSNP packets\n"
       )
{
  isis->debugs &= ~DEBUG_SNP_PACKETS ;
  print_debug (vty, DEBUG_SNP_PACKETS, 0);
  
  return CMD_SUCCESS;
}


DEFUN (debug_isis_upd,
       debug_isis_upd_cmd,
       "debug isis update-packets",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS Update related packets\n"
       )
{
  isis->debugs |= DEBUG_UPDATE_PACKETS;
  print_debug (vty, DEBUG_UPDATE_PACKETS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_upd,
       no_debug_isis_upd_cmd,
       "no debug isis update-packets",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS Update related packets\n"
       )
{
  isis->debugs &= ~DEBUG_UPDATE_PACKETS;
  print_debug (vty, DEBUG_UPDATE_PACKETS, 0);
  
  return CMD_SUCCESS;
}


DEFUN (debug_isis_spfevents,
       debug_isis_spfevents_cmd,
       "debug isis spf-events",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS Shortest Path First Events\n"
       )
{
  isis->debugs |= DEBUG_SPF_EVENTS;
  print_debug (vty, DEBUG_SPF_EVENTS , 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_spfevents,
       no_debug_isis_spfevents_cmd,
       "no debug isis spf-events",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS Shortest Path First Events\n"
       )
{
  isis->debugs &= ~DEBUG_SPF_EVENTS;
  print_debug (vty, DEBUG_SPF_EVENTS , 0);
  
  return CMD_SUCCESS;
}


DEFUN (debug_isis_spfstats,
       debug_isis_spfstats_cmd,
       "debug isis spf-statistics ",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS SPF Timing and Statistic Data\n"
       )
{
  isis->debugs |= DEBUG_SPF_STATS;
  print_debug (vty, DEBUG_SPF_STATS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_spfstats,
       no_debug_isis_spfstats_cmd,
       "no debug isis spf-statistics",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS SPF Timing and Statistic Data\n"
       )
{
  isis->debugs &= ~DEBUG_SPF_STATS;
  print_debug (vty, DEBUG_SPF_STATS, 0);
  
  return CMD_SUCCESS;
}

DEFUN (debug_isis_spftrigg,
       debug_isis_spftrigg_cmd,
       "debug isis spf-triggers",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS SPF triggering events\n"
       )
{
  isis->debugs |= DEBUG_SPF_TRIGGERS;
  print_debug (vty, DEBUG_SPF_TRIGGERS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_spftrigg,
       no_debug_isis_spftrigg_cmd,
       "no debug isis spf-triggers",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS SPF triggering events\n"
       )
{
  isis->debugs &= ~DEBUG_SPF_TRIGGERS;
  print_debug (vty, DEBUG_SPF_TRIGGERS, 0);
  
  return CMD_SUCCESS;
}

DEFUN (debug_isis_rtevents,
       debug_isis_rtevents_cmd,
       "debug isis route-events",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS Route related events\n"
       )
{
  isis->debugs |= DEBUG_RTE_EVENTS;
  print_debug (vty, DEBUG_RTE_EVENTS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_rtevents,
       no_debug_isis_rtevents_cmd,
       "no debug isis route-events",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS Route related events\n"
       )
{
  isis->debugs &= ~DEBUG_RTE_EVENTS;
  print_debug (vty, DEBUG_RTE_EVENTS, 0);
  
  return CMD_SUCCESS;
}

DEFUN (debug_isis_events,
       debug_isis_events_cmd,
       "debug isis events",
       DEBUG_STR
       "IS-IS information\n"
       "IS-IS  Events\n"
       )
{
  isis->debugs |= DEBUG_EVENTS;
  print_debug (vty, DEBUG_EVENTS, 1);

  return CMD_SUCCESS;
}

DEFUN (no_debug_isis_events,
       no_debug_isis_events_cmd,
       "no debug isis events",
       UNDEBUG_STR
       "IS-IS information\n"
       "IS-IS Events\n"
       )
{
  isis->debugs &= ~DEBUG_EVENTS;
  print_debug (vty, DEBUG_EVENTS, 0);
  
  return CMD_SUCCESS;
}


DEFUN (show_hostname,
       show_hostname_cmd,
       "show isis hostname",
       SHOW_STR
       "IS-IS information\n"
       "IS-IS Dynamic hostname mapping\n")
{
  dynhn_print_all (vty);
  
  return CMD_SUCCESS;
}


DEFUN (show_database,
       show_database_cmd,
       "show isis database",
       SHOW_STR
       "IS-IS information\n"
       "IS-IS link state database\n")
{
  struct listnode *node;
  struct isis_area *area;
  int level,lsp_count;

  if (isis->area_list->count == 0)
    return CMD_SUCCESS;
  
  for (node = listhead (isis->area_list); node; nextnode (node)) {
    area = getdata (node);
    vty_out (vty, "Area %s:%s", area->area_tag ? area->area_tag : "null",
             VTY_NEWLINE);
    for (level=0;level<ISIS_LEVELS;level++) {
      if (area->lspdb[level] && dict_count (area->lspdb[level]) > 0) {
        vty_out (vty,"IS-IS Level-%d link-state database:%s", level+1, 
                 VTY_NEWLINE);

        lsp_count = lsp_print_all (vty, area->lspdb[level],
				   ISIS_UI_LEVEL_BRIEF,
				   area->dynhostname);

	vty_out (vty,"%s    %u LSPs%s%s",
		 VTY_NEWLINE,
		 lsp_count,
		 VTY_NEWLINE,
		 VTY_NEWLINE);
      }
    }
  }

  return CMD_SUCCESS;
}


DEFUN (show_database_detail,
       show_database_detail_cmd,
       "show isis database detail",
       SHOW_STR
       "IS-IS information\n"
       "IS-IS link state database\n")
{
  struct listnode *node;
  struct isis_area *area;
  int level, lsp_count;

  if (isis->area_list->count == 0)
    return CMD_SUCCESS;

  for (node = listhead (isis->area_list); node; nextnode (node)) {
    area = getdata (node);
    vty_out (vty, "Area %s:%s", area->area_tag ? area->area_tag : "null",
             VTY_NEWLINE);
    for (level=0;level<ISIS_LEVELS;level++) {
      if (area->lspdb[level] && dict_count (area->lspdb[level]) > 0) {
        vty_out (vty,"IS-IS Level-%d Link State Database:%s", level+1, 
                 VTY_NEWLINE);

        lsp_count = lsp_print_all (vty, area->lspdb[level],
				   ISIS_UI_LEVEL_DETAIL,
				   area->dynhostname);

	vty_out (vty,"%s    %u LSPs%s%s",
		 VTY_NEWLINE,
		 lsp_count,
		 VTY_NEWLINE,
		 VTY_NEWLINE);
      }
    }
  }

  return CMD_SUCCESS;
}

/* 
 * 'router isis' command 
 */
DEFUN (router_isis,
       router_isis_cmd,
       "router isis WORD",
        ROUTER_STR
       "ISO IS-IS\n"
       "ISO Routing area tag")
{

  return isis_area_get (vty, argv[0]);
  
}

/* 
 *'no router isis' command 
 */
DEFUN (no_router_isis,
       no_router_isis_cmd,
       "no router isis WORD",
       "no\n"
       ROUTER_STR
       "ISO IS-IS\n"
       "ISO Routing area tag")

{
  return isis_area_destroy (vty, argv[0]);
}

/*
 * 'net' command
 */
DEFUN (net,
       net_cmd,
       "net WORD",
       "A Network Entity Title for this process (OSI only)\n"
       "XX.XXXX. ... .XXX.XX  Network entity title (NET)\n" )
{
  return area_net_title (vty, argv[0]);
}


/*
 * 'no net' command
 */
DEFUN (no_net,
       no_net_cmd,
       "no net WORD",
       NO_STR
       "A Network Entity Title for this process (OSI only)\n"
       "XX.XXXX. ... .XXX.XX  Network entity title (NET)\n" )
{
  return area_clear_net_title (vty, argv[0]);
}

DEFUN (area_passwd,
       area_passwd_cmd,
       "area-password WORD",
       "Configure the authentication password for an area\n"
       "Area password\n" )
{
  struct isis_area *area;
  int len;

  area = vty->index;

  if (!area) {
    vty_out (vty, "Cant find IS-IS instance%s", VTY_NEWLINE);
    return CMD_WARNING;
  }
  
  len = strlen (argv[0]);
  if (len > 254) {
    vty_out (vty, "Too long area password (>254)%s", VTY_NEWLINE);
    return CMD_WARNING;
  }
  area->area_passwd.len = (u_char)len;
  area->area_passwd.type = ISIS_PASSWD_TYPE_CLEARTXT;
  strncpy (area->area_passwd.passwd, argv[0], 255);
  
  return CMD_SUCCESS;
}

DEFUN (no_area_passwd,
       no_area_passwd_cmd,
       "no area-password",
       NO_STR
       "Configure the authentication password for an area\n")
{
  struct isis_area *area;
  
  area = vty->index;

  if (!area) {
    vty_out (vty, "Cant find IS-IS instance%s", VTY_NEWLINE);
    return CMD_WARNING;
  }
  
  memset (&area->area_passwd, 0, sizeof (struct isis_passwd));

  return CMD_SUCCESS;
}


DEFUN (domain_passwd,
       domain_passwd_cmd,
       "domain-password WORD",
       "Set the authentication password for a routing domain\n"
       "Routing domain password\n" )
{
  struct isis_area *area;
  int len;

  area = vty->index;

  if (!area) {
    vty_out (vty, "Cant find IS-IS instance%s", VTY_NEWLINE);
    return CMD_WARNING;
  }
    
  len = strlen (argv[0]);
  if (len > 254) {
    vty_out (vty, "Too long area password (>254)%s", VTY_NEWLINE);
    return CMD_WARNING;
  }
  area->domain_passwd.len = (u_char)len;
  area->domain_passwd.type = ISIS_PASSWD_TYPE_CLEARTXT;
  strncpy (area->domain_passwd.passwd, argv[0], 255);
  
  return CMD_SUCCESS;
}


DEFUN (no_domain_passwd,
       no_domain_passwd_cmd,
       "no domain-password WORD",
       NO_STR
       "Set the authentication password for a routing domain\n")
{
  struct isis_area *area;
  
  area = vty->index;

  if (!area) {
    vty_out (vty, "Cant find IS-IS instance%s", VTY_NEWLINE);
    return CMD_WARNING;
  }
  
  memset (&area->domain_passwd, 0, sizeof (struct isis_passwd));
  
  return CMD_SUCCESS;
}

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")
{
  struct isis_area *area;
  int type;

  area = vty->index;

  if (!area) {
    vty_out (vty, "Cant find IS-IS instance%s", VTY_NEWLINE);
    return CMD_WARNING;
  }

  type = string2circuit_t (argv[0]); 
  if (!type) {
    vty_out (vty, "Unknown IS level %s", VTY_NEWLINE);
    return CMD_SUCCESS;
  }

  isis_event_system_type_change (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")
{
  
  struct isis_area *area;
  int type;

  area = vty->index;
  assert (area);
  
  /*
   * Put the is-type back to default. Which is level-1-2 on first
   * circuit for the area level-1 for the rest
   */
  if (getdata (listhead (isis->area_list)) == area ) 
    type = IS_LEVEL_1_AND_2;
  else
    type = IS_LEVEL_1;

  isis_event_system_type_change (area, type);

  return CMD_SUCCESS;
}

DEFUN (lsp_gen_interval,
       lsp_gen_interval_cmd,
       "lsp-gen-interval <1-120>",
       "Minimum interval between regenerating same LSP\n"
       "Minimum interval in seconds\n")
{
  struct isis_area *area;
  uint16_t interval;

  area = vty->index;
  assert (area);
  
  interval = atoi (argv[0]);
  area->lsp_gen_interval[0] = interval;
  area->lsp_gen_interval[1] = interval;

  return CMD_SUCCESS;
}

DEFUN (no_lsp_gen_interval,
       no_lsp_gen_interval_cmd,
       "no lsp-gen-interval",
       NO_STR
       "Minimum interval between regenerating same LSP\n"
       )
{
  struct isis_area *area;

  area = vty->index;
  assert (area);
  
  area->lsp_gen_interval[0] = LSP_GEN_INTERVAL_DEFAULT;
  area->lsp_gen_interval[1] = LSP_GEN_INTERVAL_DEFAULT;

  return CMD_SUCCESS;
}

ALIAS (no_lsp_gen_interval,
       no_lsp_gen_interval_arg_cmd,
       "no lsp-gen-interval <1-120>",
       NO_STR
       "Minimum interval between regenerating same LSP\n"
       "Minimum interval in seconds\n"
       )

DEFUN (lsp_gen_interval_l1,
       lsp_gen_interval_l1_cmd,
       "lsp-gen-interval level-1 <1-120>",
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 1 only\n"
       "Minimum interval in seconds\n"
       )
{
  struct isis_area *area;
  uint16_t interval;

  area = vty->index;
  assert (area);
  
  interval = atoi (argv[0]);
  area->lsp_gen_interval[0] = interval;

  return CMD_SUCCESS;
}

DEFUN (no_lsp_gen_interval_l1,
       no_lsp_gen_interval_l1_cmd,
       "no lsp-gen-interval level-1",
       NO_STR
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 1 only\n"

       )
{
  struct isis_area *area;

  area = vty->index;
  assert (area);
  
  area->lsp_gen_interval[0] = LSP_GEN_INTERVAL_DEFAULT;

  return CMD_SUCCESS;
}

ALIAS (no_lsp_gen_interval_l1,
       no_lsp_gen_interval_l1_arg_cmd,
       "no lsp-gen-interval level-1 <1-120>",
       NO_STR
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 1 only\n"
       "Minimum interval in seconds\n"
       )


DEFUN (lsp_gen_interval_l2,
       lsp_gen_interval_l2_cmd,
       "lsp-gen-interval level-2 <1-120>",
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 2 only\n"
       "Minimum interval in seconds\n"
       )
{
  struct isis_area *area;
  int interval;

  area = vty->index;
  assert (area);
  
  interval = atoi (argv[0]);
  area->lsp_gen_interval[1] = interval;

  return CMD_SUCCESS;
}

DEFUN (no_lsp_gen_interval_l2,
       no_lsp_gen_interval_l2_cmd,
       "no lsp-gen-interval level-2",
       NO_STR
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 2 only\n"
       )
{
  struct isis_area *area;
  int interval;

  area = vty->index;
  assert (area);
  
  interval = atoi (argv[0]);
  area->lsp_gen_interval[1] = LSP_GEN_INTERVAL_DEFAULT;

  return CMD_SUCCESS;
}

ALIAS (no_lsp_gen_interval_l2,
       no_lsp_gen_interval_l2_arg_cmd,
       "no lsp-gen-interval level-2 <1-120>",
       NO_STR
       "Minimum interval between regenerating same LSP\n"
       "Set interval for level 2 only\n"
       "Minimum interval in seconds\n"
       )
     

DEFUN (metric_style,
       metric_style_cmd,
       "metric-style (narrow|wide)",
       "Use old-style (ISO 10589) or new-style packet formats\n"
       "Use old style of TLVs with narrow metric\n"
       "Use new style of TLVs to carry wider metric\n")
{
  struct isis_area *area;

  area = vty->index;
  assert (area);
  if (!strcmp(argv[0],"wide"))
    area->newmetric = 1;
  else
    area->newmetric = 0;

  return CMD_SUCCESS;
}

DEFUN (no_metric_style,
       no_metric_style_cmd,
       "no metric-style (narrow|wide)",
       NO_STR
       "Use old-style (ISO 10589) or new-style packet formats\n"
       "Use old style of TLVs with narrow metric\n"
       "Use new style of TLVs to carry wider metric\n")
{
  struct isis_area *area;

  area = vty->index;
  assert (area);

  if (!strcmp(argv[0],"wide"))
    area->newmetric = 0;
  else
    area->newmetric = 1;

  return CMD_SUCCESS;
}

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

  area = vty->index;
  assert (area);
  
  area->dynhostname = 1;
  
  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") 
{
  struct isis_area *area;

  area = vty->index;
  assert (area);
  
  area->dynhostname = 0;
  
  return CMD_SUCCESS;
}

DEFUN (spf_interval,
       spf_interval_cmd,
       "spf-interval <1-120>",
       "Minimum interval between SPF calculations\n"
       "Minimum interval between consecutive SPFs in seconds\n")
{
  struct isis_area *area;
  u_int16_t interval;
  
  area = vty->index;
  interval = atoi (argv[0]);
  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",
       NO_STR
       "Minimum interval between SPF calculations\n"
       )
{
  struct isis_area *area;
  
  area = vty->index;

  area->min_spf_interval[0] = MINIMUM_SPF_INTERVAL;
  area->min_spf_interval[1] = MINIMUM_SPF_INTERVAL;
  
  return CMD_SUCCESS;
}

ALIAS (no_spf_interval,
       no_spf_interval_arg_cmd,
       "no spf-interval <1-120>",
       NO_STR
       "Minimum interval between SPF calculations\n"
       "Minimum interval between consecutive SPFs in seconds\n"
       )

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")
{
  struct isis_area *area;
  u_int16_t interval;
  
  area = vty->index;
  interval = atoi (argv[0]);
  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")
{
  struct isis_area *area;
  
  area = vty->index;

  area->min_spf_interval[0] = MINIMUM_SPF_INTERVAL;
  
  return CMD_SUCCESS;
}

ALIAS (no_spf_interval,
       no_spf_interval_l1_arg_cmd,
       "no spf-interval level-1 <1-120>",
       NO_STR
       "Minimum interval between SPF calculations\n"
       "Set interval for level 1 only\n"
       "Minimum interval between consecutive SPFs in seconds\n")

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")
{
  struct isis_area *area;
  u_int16_t interval;
  
  area = vty->index;
  interval = atoi (argv[0]);
  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")
{
  struct isis_area *area;
  
  area = vty->index;

  area->min_spf_interval[1] = MINIMUM_SPF_INTERVAL;
  
  return CMD_SUCCESS;
}

ALIAS (no_spf_interval,
       no_spf_interval_l2_arg_cmd,
       "no spf-interval level-2 <1-120>",
       NO_STR
       "Minimum interval between SPF calculations\n"
       "Set interval for level 2 only\n"
       "Minimum interval between consecutive SPFs in seconds\n")


#ifdef TOPOLOGY_GENERATE
DEFUN (topology_generate_grid,
       topology_generate_grid_cmd,
       "topology generate grid <1-100> <1-100> <1-65000> [param] [param] "
       "[param]",
       "Topology for IS-IS\n"
       "Topology for IS-IS\n"
       "Topology grid for IS-IS\n"
       "X parameter of the grid\n"
       "Y parameter of the grid\n"
       "Random seed\n"
       "Optional param 1\n"
       "Optional param 2\n"
       "Optional param 3\n"
       "Topology\n")
{
  struct isis_area *area;

  area = vty->index;
  assert (area);

  if (!spgrid_check_params (vty, argc, argv)) {
    if (area->topology)
      list_delete (area->topology);
    area->topology = list_new();
    memcpy(area->top_params,vty->buf,200);
    gen_spgrid_topology (vty, area->topology);
    remove_topology_lsps (area);
    generate_topology_lsps (area);
  }

  return CMD_SUCCESS;
}

DEFUN (show_isis_topology,
       show_isis_topology_cmd,
       "show isis topology",
       SHOW_STR
       "clns network information\n"
       "CLNS neighbor adjacencies\n")
{
  struct isis_area *area;
  struct listnode *node;
  struct listnode *node2;
  struct arc *arc;
  LIST_LOOP (isis->area_list, area, node) {
    if (area->topology) {
      vty_out (vty, "Topology for isis area:%s%s",area->area_tag, VTY_NEWLINE);
      LIST_LOOP (area->topology, arc, node2) {
        vty_out (vty, "a  %ld   %ld   %ld%s",arc->from_node, arc->to_node, 
		 arc->distance, VTY_NEWLINE);
      }
    }
  }
  return CMD_SUCCESS;
}

/*
 * 'topology base-is' command
 */
DEFUN (topology_baseis ,
       topology_baseis_cmd,
       "topology base-is WORD",
       "Topology for IS-IS\n"
       "Topology for IS-IS\n"
       "A Network IS Base for this topology"
       "XX.XXXX.XXXX.XX Network entity title (NET)\n" )
{
  struct isis_area *area;
  u_char buff[ISIS_SYS_ID_LEN];

  area = vty->index;
  assert (area);

  if (sysid2buff (buff, argv[0])) {
    sysid2buff (area->topology_baseis, argv[0]);
  }
  
  return CMD_SUCCESS;
}

/*
 * 'no net' command
 */
DEFUN (no_topology_baseis,
       no_topology_baseis_cmd,
       "no topology base-is WORD",
       NO_STR
       "A Network Entity Title for this process (OSI only)"
       "XX.XXXX. ... .XXX.XX  Network entity title (NET)\n" )
{
  struct isis_area *area;

  area = vty->index;
  assert (area);

  memcpy(area->topology_baseis, DEFAULT_TOPOLOGY_BASEIS, ISIS_SYS_ID_LEN);
  return CMD_SUCCESS;
}

#endif /* TOPOLOGY_GENERATE */

DEFUN (lsp_lifetime,
       lsp_lifetime_cmd,
       "lsp-lifetime <380-65535>",
       "Maximum LSP lifetime\n"
       "LSP lifetime in seconds\n"
       )
{
  struct isis_area *area;
  uint16_t interval;

  area = vty->index;
  assert (area);
  
  interval = atoi (argv[0]);

  if (interval < ISIS_MIN_LSP_LIFETIME) {
    vty_out (vty, "LSP lifetime (%us) below %us%s",
	     interval,
	     ISIS_MIN_LSP_LIFETIME,
	     VTY_NEWLINE);

    return CMD_WARNING;
  }


  area->max_lsp_lifetime[0] = interval;
  area->max_lsp_lifetime[1] = interval;
  area->lsp_refresh[0] = interval-300;
  area->lsp_refresh[1] = interval-300;

  if (area->t_lsp_refresh[0]) {
    thread_cancel (area->t_lsp_refresh[0]);
    thread_execute (master, lsp_refresh_l1, area, 0);
  }

  if (area->t_lsp_refresh[1]) {
    thread_cancel (area->t_lsp_refresh[1]);
    thread_execute (master, lsp_refresh_l2, area, 0);
  }


  return CMD_SUCCESS;
}

DEFUN (no_lsp_lifetime,
       no_lsp_lifetime_cmd,
       "no lsp-lifetime",
       NO_STR
       "LSP lifetime in seconds\n"
       )
{
  struct isis_area *area;

  area = vty->index;
  assert (area);
  
  area->max_lsp_lifetime[0] = MAX_AGE;          /* 1200s */
  area->max_lsp_lifetime[1] = MAX_AGE;          /* 1200s */ 
  area->lsp_refresh[0] = MAX_LSP_GEN_INTERVAL;  /*  900s */
  area->lsp_refresh[1] = MAX_LSP_GEN_INTERVAL;  /*  900s */

  return CMD_SUCCESS;
}

ALIAS (no_lsp_lifetime,
       no_lsp_lifetime_arg_cmd,
       "no lsp-lifetime <380-65535>",
       NO_STR
       "Maximum LSP lifetime\n"
       "LSP lifetime in seconds\n"
       )

DEFUN (lsp_lifetime_l1,
       lsp_lifetime_l1_cmd,
       "lsp-lifetime level-1 <380-65535>",
       "Maximum LSP lifetime for Level 1 only\n"
       "LSP lifetime for Level 1 only in seconds\n"
       )
{
  struct isis_area *area;
  uint16_t interval;

  area = vty->index;
  assert (area);
  
  interval = atoi (argv[0]);

  if (interval < ISIS_MIN_LSP_LIFETIME) {
    vty_out (vty, "Level-1 LSP lifetime (%us) below %us%s",
	     interval,
	     ISIS_MIN_LSP_LIFETIME,
	     VTY_NEWLINE);

    return CMD_WARNING;
  }


  area->max_lsp_lifetime[0] = interval;
  area->lsp_refresh[0] = interval-300;

  return CMD_SUCCESS;
}

DEFUN (no_lsp_lifetime_l1,
       no_lsp_lifetime_l1_cmd,
       "no lsp-lifetime level-1",
       NO_STR
       "LSP lifetime for Level 1 only in seconds\n"
       )
{
  struct isis_area *area;

  area = vty->index;
  assert (area);
  
  area->max_lsp_lifetime[0] = MAX_AGE;          /* 1200s */ 
  area->lsp_refresh[0] = MAX_LSP_GEN_INTERVAL;  /*  900s */

  return CMD_SUCCESS;
}

ALIAS (no_lsp_lifetime_l1,
       no_lsp_lifetime_l1_arg_cmd,
       "no lsp-lifetime level-1 <380-65535>",
       NO_STR
       "Maximum LSP lifetime for Level 1 only\n"
       "LSP lifetime for Level 1 only in seconds\n"
       )

DEFUN (lsp_lifetime_l2,
       lsp_lifetime_l2_cmd,
       "lsp-lifetime level-2 <380-65535>",
       "Maximum LSP lifetime for Level 2 only\n"
       "LSP lifetime for Level 2 only in seconds\n"
       )
{
  struct isis_area *area;
  uint16_t interval;

  area = vty->index;
  assert (area);
  
  interval = atoi (argv[0]);

  if (interval < ISIS_MIN_LSP_LIFETIME) {
    vty_out (vty, "Level-2 LSP lifetime (%us) below %us%s",
	     interval,
	     ISIS_MIN_LSP_LIFETIME,
	     VTY_NEWLINE);

    return CMD_WARNING;
  }


  area->max_lsp_lifetime[1] = interval;
  area->lsp_refresh[1] = interval - 300;

  return CMD_SUCCESS;
}

DEFUN (no_lsp_lifetime_l2,
       no_lsp_lifetime_l2_cmd,
       "no lsp-lifetime level-2",
       NO_STR
       "LSP lifetime for Level 2 only in seconds\n"
       )
{
  struct isis_area *area;

  area = vty->index;
  assert (area);
  
  area->max_lsp_lifetime[1] = MAX_AGE;          /* 1200s */ 
  area->lsp_refresh[1] = MAX_LSP_GEN_INTERVAL;  /*  900s */

  return CMD_SUCCESS;
}

ALIAS (no_lsp_lifetime_l2,
       no_lsp_lifetime_l2_arg_cmd,
       "no lsp-lifetime level-2 <380-65535>",
       NO_STR
       "Maximum LSP lifetime for Level 2 only\n"
       "LSP lifetime for Level 2 only in seconds\n"
       )


/* IS-IS configuration write function */
int
isis_config_write (struct vty *vty)
{
  int write = 0;
  
  if (isis != NULL) {
    struct isis_area *area;
    struct listnode *node;
    struct listnode *node2;

    LIST_LOOP (isis->area_list, area, node) {
      /* ISIS - Area name */
      vty_out (vty, "router isis %s%s",area->area_tag, VTY_NEWLINE);
      write++;
      /* ISIS - Net */
      if (listcount (area->area_addrs) > 0) {
        struct area_addr *area_addr;
        LIST_LOOP (area->area_addrs, area_addr, node2) {
          vty_out (vty, " net %s%s", 
		   isonet_print (area_addr->area_addr, 
				 area_addr->addr_len + ISIS_SYS_ID_LEN + 1), 
		   VTY_NEWLINE);
          write ++;
        }
      }
      /* ISIS - Dynamic hostname - Defaults to true so only display if false*/
      if (!area->dynhostname) {
        vty_out (vty, " no hostname dynamic%s", VTY_NEWLINE);
        write ++;
      }
      /* ISIS - Metric-Style - when true displays wide */
      if (area->newmetric) {
        vty_out (vty, " metric-style wide%s", VTY_NEWLINE);
        write ++;
      }
      /* ISIS - Area is-type (level-1-2 is default) */
      if (area->is_type  == IS_LEVEL_1) {
        vty_out (vty, " is-type level-1%s", VTY_NEWLINE);
        write ++;
      } else {if (area->is_type  == IS_LEVEL_2) {
        vty_out (vty, " is-type level-2-only%s", VTY_NEWLINE);
        write ++;
      }}
      /* ISIS - Lsp generation interval */
      if (area->lsp_gen_interval[0] ==  area->lsp_gen_interval[1]) {
	if (area->lsp_gen_interval[0] != LSP_GEN_INTERVAL_DEFAULT) {
	  vty_out (vty, " lsp-gen-interval %d%s", area->lsp_gen_interval[0], 
                   VTY_NEWLINE);
	  write ++;
      }} else {
        if (area->lsp_gen_interval[0] != LSP_GEN_INTERVAL_DEFAULT) {
          vty_out (vty, " lsp-gen-interval level-1 %d%s", 
                   area->lsp_gen_interval[0], VTY_NEWLINE);
          write ++;
        }
        if (area->lsp_gen_interval[1] != LSP_GEN_INTERVAL_DEFAULT) {
          vty_out (vty, " lsp-gen-interval level-2 %d%s", 
                   area->lsp_gen_interval[1], VTY_NEWLINE);
          write ++;
        }
      }
      /* ISIS - LSP lifetime */
      if (area->max_lsp_lifetime[0] == area->max_lsp_lifetime[1]) {
	if (area->max_lsp_lifetime[0] != MAX_AGE) {
	vty_out (vty, " lsp-lifetime %u%s", area->max_lsp_lifetime[0], 
                 VTY_NEWLINE);
	write ++;
      }} else {
	if (area->max_lsp_lifetime[0] != MAX_AGE) {
	vty_out (vty, " lsp-lifetime level-1 %u%s", area->max_lsp_lifetime[0],
                 VTY_NEWLINE);
	write ++;
	}
	if (area->max_lsp_lifetime[1] != MAX_AGE) {
	vty_out (vty, " lsp-lifetime level-2 %u%s", area->max_lsp_lifetime[1],
                 VTY_NEWLINE);
	write ++;
	}
      }     
      #ifdef TOPOLOGY_GENERATE
      /* seems we save the whole command line here */
      if (area->top_params) {
        vty_out (vty, " %s%s",area->top_params, VTY_NEWLINE);
        write ++;
      }

      if (memcmp(area->topology_baseis, DEFAULT_TOPOLOGY_BASEIS, 
		 ISIS_SYS_ID_LEN)) {
        vty_out (vty, " topology base_is %s%s", 
		 sysid_print (area->topology_baseis), VTY_NEWLINE);
        write ++;
      }

      #endif /* TOPOLOGY_GENERATE */
    }
  }
  
  return write;
}

struct cmd_node isis_node =
{
  ISIS_NODE,
  "%s(config-router)# ",
  1
};

void 
isis_init ()
{

  /* Install IS-IS top node */
  install_node (&isis_node, isis_config_write);
  
  install_element (VIEW_NODE, &show_clns_neighbors_cmd);
  install_element (VIEW_NODE, &show_isis_neighbors_cmd);
  install_element (VIEW_NODE, &show_clns_neighbors_detail_cmd);
  install_element (VIEW_NODE, &show_isis_neighbors_detail_cmd);

  install_element (VIEW_NODE, &show_hostname_cmd);
  install_element (VIEW_NODE, &show_database_cmd);
  install_element (VIEW_NODE, &show_database_detail_cmd);

  install_element (ENABLE_NODE, &show_clns_neighbors_cmd);
  install_element (ENABLE_NODE, &show_isis_neighbors_cmd);
  install_element (ENABLE_NODE, &show_clns_neighbors_detail_cmd);
  install_element (ENABLE_NODE, &show_isis_neighbors_detail_cmd);

  install_element (ENABLE_NODE, &show_hostname_cmd);
  install_element (ENABLE_NODE, &show_database_cmd);
  install_element (ENABLE_NODE, &show_database_detail_cmd);
  install_element (ENABLE_NODE, &show_debugging_cmd);

  install_node(&debug_node, config_write_debug);

  install_element (ENABLE_NODE, &debug_isis_adj_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_adj_cmd);
  install_element (ENABLE_NODE, &debug_isis_csum_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_csum_cmd);
  install_element (ENABLE_NODE, &debug_isis_lupd_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_lupd_cmd);
  install_element (ENABLE_NODE, &debug_isis_err_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_err_cmd);
  install_element (ENABLE_NODE, &debug_isis_snp_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_snp_cmd);
  install_element (ENABLE_NODE, &debug_isis_upd_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_upd_cmd);
  install_element (ENABLE_NODE, &debug_isis_spfevents_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_spfevents_cmd);
  install_element (ENABLE_NODE, &debug_isis_spfstats_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_spfstats_cmd);
  install_element (ENABLE_NODE, &debug_isis_spftrigg_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_spftrigg_cmd);
  install_element (ENABLE_NODE, &debug_isis_rtevents_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_rtevents_cmd);
  install_element (ENABLE_NODE, &debug_isis_events_cmd);
  install_element (ENABLE_NODE, &no_debug_isis_events_cmd);

  install_element (CONFIG_NODE, &debug_isis_adj_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_adj_cmd);
  install_element (CONFIG_NODE, &debug_isis_csum_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_csum_cmd);
  install_element (CONFIG_NODE, &debug_isis_lupd_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_lupd_cmd);
  install_element (CONFIG_NODE, &debug_isis_err_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_err_cmd);
  install_element (CONFIG_NODE, &debug_isis_snp_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_snp_cmd);
  install_element (CONFIG_NODE, &debug_isis_upd_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_upd_cmd);
  install_element (CONFIG_NODE, &debug_isis_spfevents_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_spfevents_cmd);
  install_element (CONFIG_NODE, &debug_isis_spfstats_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_spfstats_cmd);
  install_element (CONFIG_NODE, &debug_isis_spftrigg_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_spftrigg_cmd);
  install_element (CONFIG_NODE, &debug_isis_rtevents_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_rtevents_cmd);
  install_element (CONFIG_NODE, &debug_isis_events_cmd);
  install_element (CONFIG_NODE, &no_debug_isis_events_cmd);

  install_element (CONFIG_NODE, &router_isis_cmd);
  install_element (CONFIG_NODE, &no_router_isis_cmd);

  install_default (ISIS_NODE);

  install_element (ISIS_NODE, &net_cmd);
  install_element (ISIS_NODE, &no_net_cmd);

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

  install_element (ISIS_NODE, &area_passwd_cmd);
  install_element (ISIS_NODE, &no_area_passwd_cmd);

  install_element (ISIS_NODE, &domain_passwd_cmd);
  install_element (ISIS_NODE, &no_domain_passwd_cmd);

  install_element (ISIS_NODE, &lsp_gen_interval_cmd);
  install_element (ISIS_NODE, &no_lsp_gen_interval_cmd);
  install_element (ISIS_NODE, &no_lsp_gen_interval_arg_cmd);
  install_element (ISIS_NODE, &lsp_gen_interval_l1_cmd);
  install_element (ISIS_NODE, &no_lsp_gen_interval_l1_cmd);
  install_element (ISIS_NODE, &no_lsp_gen_interval_l1_arg_cmd);
  install_element (ISIS_NODE, &lsp_gen_interval_l2_cmd);
  install_element (ISIS_NODE, &no_lsp_gen_interval_l2_cmd);
  install_element (ISIS_NODE, &no_lsp_gen_interval_l2_arg_cmd);

  install_element (ISIS_NODE, &spf_interval_cmd);
  install_element (ISIS_NODE, &no_spf_interval_cmd);
  install_element (ISIS_NODE, &no_spf_interval_arg_cmd);
  install_element (ISIS_NODE, &spf_interval_l1_cmd);
  install_element (ISIS_NODE, &no_spf_interval_l1_cmd);
  install_element (ISIS_NODE, &no_spf_interval_l1_arg_cmd);
  install_element (ISIS_NODE, &spf_interval_l2_cmd);
  install_element (ISIS_NODE, &no_spf_interval_l2_cmd);
  install_element (ISIS_NODE, &no_spf_interval_l2_arg_cmd);
  
  install_element (ISIS_NODE, &lsp_lifetime_cmd);
  install_element (ISIS_NODE, &no_lsp_lifetime_cmd);
  install_element (ISIS_NODE, &no_lsp_lifetime_arg_cmd);
  install_element (ISIS_NODE, &lsp_lifetime_l1_cmd);
  install_element (ISIS_NODE, &no_lsp_lifetime_l1_cmd);
  install_element (ISIS_NODE, &no_lsp_lifetime_l1_arg_cmd);
  install_element (ISIS_NODE, &lsp_lifetime_l2_cmd);
  install_element (ISIS_NODE, &no_lsp_lifetime_l2_cmd);
  install_element (ISIS_NODE, &no_lsp_lifetime_l2_arg_cmd);

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

  install_element (ISIS_NODE, &metric_style_cmd);
  install_element (ISIS_NODE, &no_metric_style_cmd);
#ifdef TOPOLOGY_GENERATE
  install_element (ISIS_NODE, &topology_generate_grid_cmd);
  install_element (ISIS_NODE, &topology_baseis_cmd);
  install_element (ISIS_NODE, &no_topology_baseis_cmd);
  install_element (VIEW_NODE, &show_isis_topology_cmd);
  install_element (ENABLE_NODE, &show_isis_topology_cmd);
#endif /* TOPOLOGY_GENERATE */

  isis_new(0);
  isis_circuit_init ();
  isis_zebra_init ();
  isis_spf_cmds_init ();
}