ripng_zebra.c

大名鼎鼎的路由器源码。程序分ZEBRA、OSPFRIP等3个包。程序框架采用一个路由协议一个进程的方式

/*
 * RIPngd and zebra interface.
 * Copyright (C) 1998, 1999 Kunihiro Ishiguro
 *
 * 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 "command.h"
#include "prefix.h"
#include "stream.h"
#include "routemap.h"
#include "zclient.h"
#include "log.h"

#include "ripngd/ripngd.h"

/* All information about zebra. */
struct zclient *zclient = NULL;

/* Callback prototypes for zebra client service. */
int ripng_interface_up (int, struct zclient *, zebra_size_t);
int ripng_interface_down (int, struct zclient *, zebra_size_t);
int ripng_interface_add (int, struct zclient *, zebra_size_t);
int ripng_interface_delete (int, struct zclient *, zebra_size_t);
int ripng_interface_address_add (int, struct zclient *, zebra_size_t);
int ripng_interface_address_delete (int, struct zclient *, zebra_size_t);

void
ripng_zebra_ipv6_add (struct prefix_ipv6 *p, struct in6_addr *nexthop,
		      unsigned int ifindex)
{
  struct zapi_ipv6 api;

  if (zclient->redist[ZEBRA_ROUTE_RIPNG])
    {
      api.type = ZEBRA_ROUTE_RIPNG;
      api.flags = 0;
      api.message = 0;
      SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
      api.nexthop_num = 1;
      api.nexthop = &nexthop;
      SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
      api.ifindex_num = 1;
      api.ifindex = &ifindex;

      zapi_ipv6_add (zclient, p, &api);
    }
}

void
ripng_zebra_ipv6_delete (struct prefix_ipv6 *p, struct in6_addr *nexthop,
			 unsigned int ifindex)
{
  struct zapi_ipv6 api;

  if (zclient->redist[ZEBRA_ROUTE_RIPNG])
    {
      api.type = ZEBRA_ROUTE_RIPNG;
      api.flags = 0;
      api.message = 0;
      SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
      api.nexthop_num = 1;
      api.nexthop = &nexthop;
      SET_FLAG (api.message, ZAPI_MESSAGE_IFINDEX);
      api.ifindex_num = 1;
      api.ifindex = &ifindex;

      zapi_ipv6_delete (zclient, p, &api);
    }
}

/* Zebra route add and delete treatment. */
int
ripng_zebra_read_ipv6 (int command, struct zclient *zclient,
		       zebra_size_t length)
{
  struct stream *s;
  struct zapi_ipv6 api;
  unsigned long ifindex;
  struct in6_addr nexthop;
  struct prefix_ipv6 p;

  s = zclient->ibuf;
  ifindex = 0;
  memset (&nexthop, 0, sizeof (struct in6_addr));

  /* Type, flags, message. */
  api.type = stream_getc (s);
  api.flags = stream_getc (s);
  api.message = stream_getc (s);

  /* IPv6 prefix. */
  memset (&p, 0, sizeof (struct prefix_ipv6));
  p.family = AF_INET6;
  p.prefixlen = stream_getc (s);
  stream_get (&p.prefix, s, PSIZE (p.prefixlen));

  /* Nexthop, ifindex, distance, metric. */
  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP))
    {
      api.nexthop_num = stream_getc (s);
      stream_get (&nexthop, s, 16);
    }
  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX))
    {
      api.ifindex_num = stream_getc (s);
      ifindex = stream_getl (s);
    }
  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE))
    api.distance = stream_getc (s);
  else
    api.distance = 0;
  if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC))
    api.metric = stream_getl (s);
  else
    api.metric = 0;

  if (command == ZEBRA_IPV6_ROUTE_ADD)
    ripng_redistribute_add (api.type, 0, &p, ifindex);
  else
    ripng_redistribute_delete (api.type, 0, &p, ifindex);

  return 0;
}

int
ripng_redistribute_unset (int type)
{
  if (! zclient->redist[type])
    return CMD_SUCCESS;

  zclient->redist[type] = 0;

  if (zclient->sock > 0)
    zebra_redistribute_send (ZEBRA_REDISTRIBUTE_DELETE, zclient->sock, type);

  ripng_redistribute_withdraw (type);
  
  return CMD_SUCCESS;
}

void
ripng_redistribute_metric_set (int type, int metric)
{
  ripng->route_map[type].metric_config = 1;
  ripng->route_map[type].metric = metric;
}

void
ripng_redistribute_metric_unset (int type)
{
  ripng->route_map[type].metric_config = 0;
  ripng->route_map[type].metric = 0;
}

void
ripng_redistribute_routemap_set (int type, char *name)
{
  if (ripng->route_map[type].name)
    free (ripng->route_map[type].name);

  ripng->route_map[type].name = strdup (name);
  ripng->route_map[type].map = route_map_lookup_by_name (name);
}

void
ripng_redistribute_routemap_unset (int type)
{
  if (ripng->route_map[type].name)
    free (ripng->route_map[type].name);

  ripng->route_map[type].name = NULL;
  ripng->route_map[type].map = NULL;
}


DEFUN (router_zebra,
       router_zebra_cmd,
       "router zebra",
       "Enable a routing process\n"
       "Make connection to zebra daemon\n")
{
  vty->node = ZEBRA_NODE;
  zclient->enable = 1;
  zclient_start (zclient);
  return CMD_SUCCESS;
}

DEFUN (no_router_zebra,
       no_router_zebra_cmd,
       "no router zebra",
       NO_STR
       "Disable a routing process\n"
       "Stop connection to zebra daemon\n")
{
  zclient->enable = 0;
  zclient_stop (zclient);
  return CMD_SUCCESS;
}

DEFUN (ripng_redistribute_ripng,
       ripng_redistribute_ripng_cmd,
       "redistribute ripng",
       "Redistribute information from another routing protocol\n"
       "RIPng route\n")
{
  zclient->redist[ZEBRA_ROUTE_RIPNG] = 1;
  return CMD_SUCCESS;
}

DEFUN (no_ripng_redistribute_ripng,
       no_ripng_redistribute_ripng_cmd,
       "no redistribute ripng",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "RIPng route\n")
{
  zclient->redist[ZEBRA_ROUTE_RIPNG] = 0;
  return CMD_SUCCESS;
}

DEFUN (ripng_redistribute_static,
       ripng_redistribute_static_cmd,
       "redistribute static",
       "Redistribute information from another routing protocol\n"
       "Static routes\n")
{
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_STATIC);
  return CMD_SUCCESS;
}

DEFUN (no_ripng_redistribute_static,
       no_ripng_redistribute_static_cmd,
       "no redistribute static",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Static routes\n")
{
  ripng_redistribute_metric_unset (ZEBRA_ROUTE_STATIC);
  ripng_redistribute_routemap_unset (ZEBRA_ROUTE_STATIC);
  return ripng_redistribute_unset (ZEBRA_ROUTE_STATIC);
}

DEFUN (ripng_redistribute_kernel,
       ripng_redistribute_kernel_cmd,
       "redistribute kernel",
       "Redistribute information from another routing protocol\n"
       "Kernel routes\n")
{
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_KERNEL);
  return CMD_SUCCESS;
}

DEFUN (no_ripng_redistribute_kernel,
       no_ripng_redistribute_kernel_cmd,
       "no redistribute kernel",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Kernel routes\n")
{
  ripng_redistribute_metric_unset (ZEBRA_ROUTE_KERNEL);
  ripng_redistribute_routemap_unset (ZEBRA_ROUTE_KERNEL);
  return ripng_redistribute_unset (ZEBRA_ROUTE_KERNEL);
}

DEFUN (ripng_redistribute_connected,
       ripng_redistribute_connected_cmd,
       "redistribute connected",
       "Redistribute information from another routing protocol\n"
       "Connected\n")
{
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_CONNECT);
  return CMD_SUCCESS;
}

DEFUN (no_ripng_redistribute_connected,
       no_ripng_redistribute_connected_cmd,
       "no redistribute connected",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Connected\n")
{
  ripng_redistribute_metric_unset (ZEBRA_ROUTE_CONNECT);
  ripng_redistribute_routemap_unset (ZEBRA_ROUTE_CONNECT);
  return ripng_redistribute_unset (ZEBRA_ROUTE_CONNECT);
}

DEFUN (ripng_redistribute_bgp,
       ripng_redistribute_bgp_cmd,
       "redistribute bgp",
       "Redistribute information from another routing protocol\n"
       "Border Gateway Protocol (BGP)\n")
{
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_BGP);
  return CMD_SUCCESS;
}

DEFUN (no_ripng_redistribute_bgp,
       no_ripng_redistribute_bgp_cmd,
       "no redistribute bgp",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Border Gateway Protocol (BGP)\n")
{
  ripng_redistribute_metric_unset (ZEBRA_ROUTE_BGP);
  ripng_redistribute_routemap_unset (ZEBRA_ROUTE_BGP);
  return ripng_redistribute_unset (ZEBRA_ROUTE_BGP);
}

DEFUN (ripng_redistribute_ospf6,
       ripng_redistribute_ospf6_cmd,
       "redistribute ospf6",
       "Redistribute information from another routing protocol\n"
       "IPv6 Open Shortest Path First (OSPFv3)\n")
{
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_OSPF6);
  return CMD_SUCCESS;
}

DEFUN (no_ripng_redistribute_ospf6,
       no_ripng_redistribute_ospf6_cmd,
       "no redistribute ospf6",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "IPv6 Open Shortest Path First (OSPFv3)\n")
{
  ripng_redistribute_metric_unset (ZEBRA_ROUTE_OSPF6);
  ripng_redistribute_routemap_unset (ZEBRA_ROUTE_OSPF6);
  return ripng_redistribute_unset (ZEBRA_ROUTE_OSPF6);
}

DEFUN (ripng_redistribute_kernel_metric,
       ripng_redistribute_kernel_metric_cmd,
       "redistribute kernel metric <0-16>",
       "Redistribute information from another routing protocol\n"
       "Kernel routes\n"
       "Metric\n"
       "Metric value\n")
{
  ripng_redistribute_metric_set (ZEBRA_ROUTE_KERNEL, atoi (argv[0]));
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_KERNEL);
  return CMD_SUCCESS;
}

ALIAS (no_ripng_redistribute_kernel,
       no_ripng_redistribute_kernel_metric_cmd,
       "no redistribute kernel metric",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Kernel routes\n"
       "Metric\n");

ALIAS (no_ripng_redistribute_kernel,
       no_ripng_redistribute_kernel_metric_val_cmd,
       "no redistribute kernel metric <0-16>",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Kernel routes\n"
       "Metric\n"
       "Metric value\n");

DEFUN (ripng_redistribute_connected_metric,
       ripng_redistribute_connected_metric_cmd,
       "redistribute connected metric <0-16>",
       "Redistribute information from another routing protocol\n"
       "Connected\n"
       "Metric\n"
       "Metric value\n")
{
  ripng_redistribute_metric_set (ZEBRA_ROUTE_CONNECT, atoi (argv[0]));
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_CONNECT);
  return CMD_SUCCESS;
}

ALIAS (no_ripng_redistribute_connected,
       no_ripng_redistribute_connected_metric_cmd,
       "no redistribute connected metric",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Connected\n"
       "Metric\n");

ALIAS (no_ripng_redistribute_connected,
       no_ripng_redistribute_connected_metric_val_cmd,
       "no redistribute connected metric <0-16>",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Connected\n"
       "Metric\n"
       "Metric value\n");

DEFUN (ripng_redistribute_static_metric,
       ripng_redistribute_static_metric_cmd,
       "redistribute static metric <0-16>",
       "Redistribute information from another routing protocol\n"
       "Static routes\n"
       "Metric\n"
       "Metric value\n")
{
  ripng_redistribute_metric_set (ZEBRA_ROUTE_STATIC, atoi (argv[0]));
  zclient_redistribute_set (zclient, ZEBRA_ROUTE_STATIC);
  return CMD_SUCCESS;
}

ALIAS (no_ripng_redistribute_static,
       no_ripng_redistribute_static_metric_cmd,
       "no redistribute static metric",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Static routes\n"
       "Metric\n");

ALIAS (no_ripng_redistribute_static,
       no_ripng_redistribute_static_metric_val_cmd,
       "no redistribute static metric <0-16>",
       NO_STR
       "Redistribute information from another routing protocol\n"
       "Static routes\n"
       "Metric\n"
       "Metric value\n");

DEFUN (ripng_redistribute_ospf6_metric,