ospf6_zebra.c

linux 路由软件 可支持RIP OSPF BGP等

  if (IS_OSPF6_DEBUG_ZEBRA (SEND))
    {
      prefix2str (&request->prefix, buf, sizeof (buf));
      zlog_info ("Send %s route: %s",
                 (type == REM ? "remove" : "add"), buf);
    }

  if (zclient->sock < 0)
    {
      if (IS_OSPF6_DEBUG_ZEBRA (SEND))
        zlog_info ("  Not connected to Zebra");
      return;
    }

  if (request->path.origin.adv_router == ospf6->router_id &&
      (request->path.type == OSPF6_PATH_TYPE_EXTERNAL1 ||
       request->path.type == OSPF6_PATH_TYPE_EXTERNAL2))
    {
      if (IS_OSPF6_DEBUG_ZEBRA (SEND))
        zlog_info ("  Ignore self-originated external route");
      return;
    }

  /* If removing is the best path and if there's another path,
     treat this request as add the secondary path */
  if (type == REM && ospf6_route_is_best (request) &&
      request->next && ospf6_route_is_same (request, request->next))
    {
      if (IS_OSPF6_DEBUG_ZEBRA (SEND))
        zlog_info ("  Best-path removal resulted Sencondary addition");
      type = ADD;
      request = request->next;
    }

  /* Only the best path will be sent to zebra. */
  if (! ospf6_route_is_best (request))
    {
      /* this is not preferred best route, ignore */
      if (IS_OSPF6_DEBUG_ZEBRA (SEND))
        zlog_info ("  Ignore non-best route");
      return;
    }

  nhcount = 0;
  for (i = 0; i < OSPF6_MULTI_PATH_LIMIT; i++)
    if (ospf6_nexthop_is_set (&request->nexthop[i]))
      nhcount++;

  if (nhcount == 0)
    {
      if (IS_OSPF6_DEBUG_ZEBRA (SEND))
        zlog_info ("  No nexthop, ignore");
      return;
    }

  /* allocate memory for nexthop_list */
  nexthops = XCALLOC (MTYPE_OSPF6_OTHER,
                      nhcount * sizeof (struct in6_addr *));
  if (nexthops == NULL)
    {
      zlog_warn ("Can't send route to zebra: malloc failed");
      return;
    }

  /* allocate memory for ifindex_list */
  ifindexes = XCALLOC (MTYPE_OSPF6_OTHER,
                       nhcount * sizeof (unsigned int));
  if (ifindexes == NULL)
    {
      zlog_warn ("Can't send route to zebra: malloc failed");
      XFREE (MTYPE_OSPF6_OTHER, nexthops);
      return;
    }

  for (i = 0; i < nhcount; i++)
    {
      if (IS_OSPF6_DEBUG_ZEBRA (SEND))
        {
          inet_ntop (AF_INET6, &request->nexthop[i].address,
                     buf, sizeof (buf));
          if_indextoname (request->nexthop[i].ifindex, ifname);
          zlog_info ("  nexthop: %s%%%s(%d)", buf, ifname,
                     request->nexthop[i].ifindex);
        }
      nexthops[i] = &request->nexthop[i].address;
      ifindexes[i] = request->nexthop[i].ifindex;
    }

  api.type = ZEBRA_ROUTE_OSPF6;
  api.flags = 0;
  api.message = 0;
  SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
  api.nexthop_num = nhcount;
  api.nexthop = nexthops;
  SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
  api.ifindex_num = nhcount;
  api.ifindex = ifindexes;
  SET_FLAG (api.message, ZAPI_MESSAGE_METRIC);
  api.metric = (request->path.metric_type == 2 ?
                request->path.cost_e2 : request->path.cost);

  dest = (struct prefix_ipv6 *) &request->prefix;
  if (type == REM)
    ret = zapi_ipv6_delete (zclient, dest, &api);
  else
    ret = zapi_ipv6_add (zclient, dest, &api);

  if (ret < 0)
    zlog_err ("zapi_ipv6_%s () failed: %s",
              (type == REM ? "delete" : "add"), strerror (errno));

  XFREE (MTYPE_OSPF6_OTHER, nexthops);
  XFREE (MTYPE_OSPF6_OTHER, ifindexes);

  return;
}

void
ospf6_zebra_route_update_add (struct ospf6_route *request)
{
  if (! zclient->redist[ZEBRA_ROUTE_OSPF6])
    {
      ospf6->route_table->hook_add = NULL;
      ospf6->route_table->hook_remove = NULL;
      return;
    }
  ospf6_zebra_route_update (ADD, request);
}

void
ospf6_zebra_route_update_remove (struct ospf6_route *request)
{
  if (! zclient->redist[ZEBRA_ROUTE_OSPF6])
    {
      ospf6->route_table->hook_add = NULL;
      ospf6->route_table->hook_remove = NULL;
      return;
    }
  ospf6_zebra_route_update (REM, request);
}

DEFUN (redistribute_ospf6,
       redistribute_ospf6_cmd,
       "redistribute ospf6",
       "Redistribute control\n"
       "OSPF6 route\n")
{
  struct ospf6_route *route;

  if (zclient->redist[ZEBRA_ROUTE_OSPF6])
    return CMD_SUCCESS;

  zclient->redist[ZEBRA_ROUTE_OSPF6] = 1;

  if (ospf6 == NULL)
    return CMD_SUCCESS;

  /* send ospf6 route to zebra route table */
  for (route = ospf6_route_head (ospf6->route_table); route;
       route = ospf6_route_next (route))
    ospf6_zebra_route_update_add (route);

  ospf6->route_table->hook_add = ospf6_zebra_route_update_add;
  ospf6->route_table->hook_remove = ospf6_zebra_route_update_remove;

  return CMD_SUCCESS;
}

DEFUN (no_redistribute_ospf6,
       no_redistribute_ospf6_cmd,
       "no redistribute ospf6",
       NO_STR
       "Redistribute control\n"
       "OSPF6 route\n")
{
  struct ospf6_route *route;

  if (! zclient->redist[ZEBRA_ROUTE_OSPF6])
    return CMD_SUCCESS;

  zclient->redist[ZEBRA_ROUTE_OSPF6] = 0;

  if (ospf6 == NULL)
    return CMD_SUCCESS;

  ospf6->route_table->hook_add = NULL;
  ospf6->route_table->hook_remove = NULL;

  /* withdraw ospf6 route from zebra route table */
  for (route = ospf6_route_head (ospf6->route_table); route;
       route = ospf6_route_next (route))
    ospf6_zebra_route_update_remove (route);

  return CMD_SUCCESS;
}

void
ospf6_zebra_init ()
{
  /* Allocate zebra structure. */
  zclient = zclient_new ();
  zclient_init (zclient, ZEBRA_ROUTE_OSPF6);
  zclient->interface_add = ospf6_zebra_if_add;
  zclient->interface_delete = ospf6_zebra_if_del;
  zclient->interface_up = ospf6_zebra_if_state_update;
  zclient->interface_down = ospf6_zebra_if_state_update;
  zclient->interface_address_add = ospf6_zebra_if_address_update_add;
  zclient->interface_address_delete = ospf6_zebra_if_address_update_delete;
  zclient->ipv4_route_add = NULL;
  zclient->ipv4_route_delete = NULL;
  zclient->ipv6_route_add = ospf6_zebra_read_ipv6;
  zclient->ipv6_route_delete = ospf6_zebra_read_ipv6;

  /* redistribute connected route by default */
  /* ospf6_zebra_redistribute (ZEBRA_ROUTE_CONNECT); */

  /* Install zebra node. */
  install_node (&zebra_node, config_write_ospf6_zebra);

  /* Install command element for zebra node. */
  install_element (VIEW_NODE, &show_zebra_cmd);
  install_element (ENABLE_NODE, &show_zebra_cmd);
  install_element (CONFIG_NODE, &router_zebra_cmd);
  install_element (CONFIG_NODE, &no_router_zebra_cmd);

  install_default (ZEBRA_NODE);
  install_element (ZEBRA_NODE, &redistribute_ospf6_cmd);
  install_element (ZEBRA_NODE, &no_redistribute_ospf6_cmd);

  return;
}

/* Debug */

DEFUN (debug_ospf6_zebra_sendrecv,
       debug_ospf6_zebra_sendrecv_cmd,
       "debug ospf6 zebra (send|recv)",
       DEBUG_STR
       OSPF6_STR
       "Debug connection between zebra\n"
       "Debug Sending zebra\n"
       "Debug Receiving zebra\n"
      )
{
  unsigned char level = 0;

  if (argc)
    {
      if (! strncmp (argv[0], "s", 1))
        level = OSPF6_DEBUG_ZEBRA_SEND;
      else if (! strncmp (argv[0], "r", 1))
        level = OSPF6_DEBUG_ZEBRA_RECV;
    }
  else
    level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;

  OSPF6_DEBUG_ZEBRA_ON (level);
  return CMD_SUCCESS;
}

ALIAS (debug_ospf6_zebra_sendrecv,
       debug_ospf6_zebra_cmd,
       "debug ospf6 zebra",
       DEBUG_STR
       OSPF6_STR
       "Debug connection between zebra\n"
      );


DEFUN (no_debug_ospf6_zebra_sendrecv,
       no_debug_ospf6_zebra_sendrecv_cmd,
       "no debug ospf6 zebra (send|recv)",
       NO_STR
       DEBUG_STR
       OSPF6_STR
       "Debug connection between zebra\n"
       "Debug Sending zebra\n"
       "Debug Receiving zebra\n"
      )
{
  unsigned char level = 0;

  if (argc)
    {
      if (! strncmp (argv[0], "s", 1))
        level = OSPF6_DEBUG_ZEBRA_SEND;
      else if (! strncmp (argv[0], "r", 1))
        level = OSPF6_DEBUG_ZEBRA_RECV;
    }
  else
    level = OSPF6_DEBUG_ZEBRA_SEND | OSPF6_DEBUG_ZEBRA_RECV;

  OSPF6_DEBUG_ZEBRA_OFF (level);
  return CMD_SUCCESS;
}

ALIAS (no_debug_ospf6_zebra_sendrecv,
       no_debug_ospf6_zebra_cmd,
       "no debug ospf6 zebra",
       NO_STR
       DEBUG_STR
       OSPF6_STR
       "Debug connection between zebra\n"
      );

int
config_write_ospf6_debug_zebra (struct vty *vty)
{
  if (IS_OSPF6_DEBUG_ZEBRA (SEND) && IS_OSPF6_DEBUG_ZEBRA (RECV))
    vty_out (vty, "debug ospf6 zebra%s", VNL);
  else
    {
      if (IS_OSPF6_DEBUG_ZEBRA (SEND))
        vty_out (vty, "debug ospf6 zebra send%s", VNL);
      if (IS_OSPF6_DEBUG_ZEBRA (RECV))
        vty_out (vty, "debug ospf6 zebra recv%s", VNL);
    }
  return 0;
}

void
install_element_ospf6_debug_zebra ()
{
  install_element (ENABLE_NODE, &debug_ospf6_zebra_cmd);
  install_element (ENABLE_NODE, &no_debug_ospf6_zebra_cmd);
  install_element (ENABLE_NODE, &debug_ospf6_zebra_sendrecv_cmd);
  install_element (ENABLE_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
  install_element (CONFIG_NODE, &debug_ospf6_zebra_cmd);
  install_element (CONFIG_NODE, &no_debug_ospf6_zebra_cmd);
  install_element (CONFIG_NODE, &debug_ospf6_zebra_sendrecv_cmd);
  install_element (CONFIG_NODE, &no_debug_ospf6_zebra_sendrecv_cmd);
}