ospf6_top.c

linux 路由软件 可支持RIP OSPF BGP等

/*
 * Copyright (C) 2003 Yasuhiro Ohara
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU Zebra; see the file COPYING.  If not, write to the 
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 
 * Boston, MA 02111-1307, USA.  
 */

#include <zebra.h>

#include "log.h"
#include "memory.h"
#include "vty.h"
#include "linklist.h"
#include "prefix.h"
#include "table.h"
#include "thread.h"
#include "command.h"

#include "ospf6_proto.h"
#include "ospf6_message.h"
#include "ospf6_lsa.h"
#include "ospf6_lsdb.h"
#include "ospf6_route.h"
#include "ospf6_zebra.h"

#include "ospf6_top.h"
#include "ospf6_area.h"
#include "ospf6_interface.h"
#include "ospf6_neighbor.h"

#include "ospf6_flood.h"
#include "ospf6_asbr.h"
#include "ospf6_abr.h"
#include "ospf6_intra.h"
#include "ospf6d.h"

/* global ospf6d variable */
struct ospf6 *ospf6;

void
ospf6_top_lsdb_hook_add (struct ospf6_lsa *lsa)
{
  switch (ntohs (lsa->header->type))
    {
      case OSPF6_LSTYPE_AS_EXTERNAL:
        ospf6_asbr_lsa_add (lsa);
        break;

      default:
        break;
    }
}

void
ospf6_top_lsdb_hook_remove (struct ospf6_lsa *lsa)
{
  switch (ntohs (lsa->header->type))
    {
      case OSPF6_LSTYPE_AS_EXTERNAL:
        ospf6_asbr_lsa_remove (lsa);
        break;

      default:
        break;
    }
}

void
ospf6_top_route_hook_add (struct ospf6_route *route)
{
  ospf6_abr_originate_summary (route);
  ospf6_zebra_route_update_add (route);
}

void
ospf6_top_route_hook_remove (struct ospf6_route *route)
{
  ospf6_abr_originate_summary (route);
  ospf6_zebra_route_update_remove (route);
}

void
ospf6_top_brouter_hook_add (struct ospf6_route *route)
{
  ospf6_abr_examin_brouter (ADV_ROUTER_IN_PREFIX (&route->prefix));
  ospf6_asbr_lsentry_add (route);
  ospf6_abr_originate_summary (route);
}

void
ospf6_top_brouter_hook_remove (struct ospf6_route *route)
{
  ospf6_abr_examin_brouter (ADV_ROUTER_IN_PREFIX (&route->prefix));
  ospf6_asbr_lsentry_remove (route);
  ospf6_abr_originate_summary (route);
}

struct ospf6 *
ospf6_create ()
{
  struct ospf6 *o;

  o = XMALLOC (MTYPE_OSPF6_TOP, sizeof (struct ospf6));
  memset (o, 0, sizeof (struct ospf6));

  /* initialize */
  gettimeofday (&o->starttime, (struct timezone *) NULL);
  o->area_list = list_new ();
  o->area_list->cmp = ospf6_area_cmp;
  o->lsdb = ospf6_lsdb_create (o);
  o->lsdb_self = ospf6_lsdb_create (o);
  o->lsdb->hook_add = ospf6_top_lsdb_hook_add;
  o->lsdb->hook_remove = ospf6_top_lsdb_hook_remove;

  o->route_table = ospf6_route_table_create ();
  o->route_table->hook_add = ospf6_top_route_hook_add;
  o->route_table->hook_remove = ospf6_top_route_hook_remove;

  o->brouter_table = ospf6_route_table_create ();
  o->brouter_table->hook_add = ospf6_top_brouter_hook_add;
  o->brouter_table->hook_remove = ospf6_top_brouter_hook_remove;

  o->external_table = ospf6_route_table_create ();
  o->external_id_table = route_table_init ();

  return o;
}

void
ospf6_delete (struct ospf6 *o)
{
  listnode i;
  struct ospf6_area *oa;

  for (i = listhead (o->area_list); i; nextnode (i))
    {
      oa = (struct ospf6_area *) getdata (i);
      ospf6_area_delete (oa);
    }

  ospf6_lsdb_delete (o->lsdb);
  ospf6_lsdb_delete (o->lsdb_self);

  ospf6_route_table_delete (o->route_table);
  ospf6_route_table_delete (o->brouter_table);

  ospf6_route_table_delete (o->external_table);
  route_table_finish (o->external_id_table);

  XFREE (MTYPE_OSPF6_TOP, o);
}

void
ospf6_enable (struct ospf6 *o)
{
  listnode i;
  struct ospf6_area *oa;

  if (CHECK_FLAG (o->flag, OSPF6_DISABLED))
    {
      UNSET_FLAG (o->flag, OSPF6_DISABLED);
      for (i = listhead (o->area_list); i; nextnode (i))
        {
          oa = (struct ospf6_area *) getdata (i);
          ospf6_area_enable (oa);
        }
    }
}

void
ospf6_disable (struct ospf6 *o)
{
  listnode i;
  struct ospf6_area *oa;

  if (! CHECK_FLAG (o->flag, OSPF6_DISABLED))
    {
      SET_FLAG (o->flag, OSPF6_DISABLED);
      for (i = listhead (o->area_list); i; nextnode (i))
        {
          oa = (struct ospf6_area *) getdata (i);
          ospf6_area_disable (oa);
        }

      ospf6_lsdb_remove_all (o->lsdb);
      ospf6_route_remove_all (o->route_table);
      ospf6_route_remove_all (o->brouter_table);
    }
}

int
ospf6_maxage_remover (struct thread *thread)
{
  struct ospf6 *o = (struct ospf6 *) THREAD_ARG (thread);
  struct ospf6_area *oa;
  struct ospf6_interface *oi;
  struct ospf6_neighbor *on;
  listnode i, j, k;

  o->maxage_remover = (struct thread *) NULL;

  for (i = listhead (o->area_list); i; nextnode (i))
    {
      oa = (struct ospf6_area *) getdata (i);
      for (j = listhead (oa->if_list); j; nextnode (j))
        {
          oi = (struct ospf6_interface *) getdata (j);
          for (k = listhead (oi->neighbor_list); k; nextnode (k))
            {
              on = (struct ospf6_neighbor *) getdata (k);
              if (on->state != OSPF6_NEIGHBOR_EXCHANGE &&
                  on->state != OSPF6_NEIGHBOR_LOADING)
                continue;

              return 0;
            }
        }
    }

  for (i = listhead (o->area_list); i; nextnode (i))
    {
      oa = (struct ospf6_area *) getdata (i);
      for (j = listhead (oa->if_list); j; nextnode (j))
        {
          oi = (struct ospf6_interface *) getdata (j);
          OSPF6_LSDB_MAXAGE_REMOVER (oi->lsdb);
        }
      OSPF6_LSDB_MAXAGE_REMOVER (oa->lsdb);
    }
  OSPF6_LSDB_MAXAGE_REMOVER (o->lsdb);

  return 0;
}

void
ospf6_maxage_remove (struct ospf6 *o)
{
  if (o && ! o->maxage_remover)
    o->maxage_remover = thread_add_event (master, ospf6_maxage_remover, o, 0);
}

/* start ospf6 */
DEFUN (router_ospf6,
       router_ospf6_cmd,
       "router ospf6",
       ROUTER_STR
       OSPF6_STR)
{
  if (ospf6 == NULL)
    ospf6 = ospf6_create ();
  if (CHECK_FLAG (ospf6->flag, OSPF6_DISABLED))
    ospf6_enable (ospf6);

  /* set current ospf point. */
  vty->node = OSPF6_NODE;
  vty->index = ospf6;

  return CMD_SUCCESS;
}

/* stop ospf6 */
DEFUN (no_router_ospf6,
       no_router_ospf6_cmd,
       "no router ospf6",
       NO_STR
       OSPF6_ROUTER_STR)
{
  if (ospf6 == NULL || CHECK_FLAG (ospf6->flag, OSPF6_DISABLED))
    vty_out (vty, "OSPFv3 is not running%s", VNL);
  else
    ospf6_disable (ospf6);

  /* return to config node . */
  vty->node = CONFIG_NODE;
  vty->index = NULL;

  return CMD_SUCCESS;
}

/* change Router_ID commands. */
DEFUN (ospf6_router_id,
       ospf6_router_id_cmd,
       "router-id A.B.C.D",
       "Configure OSPF Router-ID\n"
       V4NOTATION_STR)
{
  int ret;
  u_int32_t router_id;
  struct ospf6 *o;

  o = (struct ospf6 *) vty->index;

  ret = inet_pton (AF_INET, argv[0], &router_id);
  if (ret == 0)
    {
      vty_out (vty, "malformed OSPF Router-ID: %s%s", argv[0], VNL);
      return CMD_SUCCESS;
    }

  o->router_id = router_id;
  return CMD_SUCCESS;
}

DEFUN (ospf6_interface_area,
       ospf6_interface_area_cmd,
       "interface IFNAME area A.B.C.D",
       "Enable routing on an IPv6 interface\n"
       IFNAME_STR
       "Specify the OSPF6 area ID\n"
       "OSPF6 area ID in IPv4 address notation\n"
      )
{
  struct ospf6 *o;
  struct ospf6_area *oa;
  struct ospf6_interface *oi;
  struct interface *ifp;
  u_int32_t area_id;

  o = (struct ospf6 *) vty->index;

  /* find/create ospf6 interface */
  ifp = if_get_by_name (argv[0]);
  oi = (struct ospf6_interface *) ifp->info;
  if (oi == NULL)
    oi = ospf6_interface_create (ifp);
  if (oi->area)
    {