ripngd.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

  ripng->update_time = RIPNG_UPDATE_TIMER_DEFAULT;
  ripng_event (RIPNG_UPDATE_EVENT, 0);
  return CMD_SUCCESS;
}

/* RIPng timeout timer setup. */
DEFUN (ripng_timeout_timer,
       ripng_timeout_timer_cmd,
       "timeout-timer SECOND",
       "Set RIPng timeout timer in seconds\n"
       "Seconds\n")
{
  unsigned long timeout;
  char *endptr = NULL;

  timeout = strtoul (argv[0], &endptr, 10);
  if (timeout == ULONG_MAX || *endptr != '\0')
    {
      vty_out (vty, "timeout timer value error%s", VTY_NEWLINE);
      return CMD_WARNING;
    }

  ripng->timeout_time = timeout;

  return CMD_SUCCESS;
}

DEFUN (no_ripng_timeout_timer,
       no_ripng_timeout_timer_cmd,
       "no timeout-timer SECOND",
       NO_STR
       "Unset RIPng timeout timer in seconds\n"
       "Seconds\n")
{
  ripng->timeout_time = RIPNG_TIMEOUT_TIMER_DEFAULT;
  return CMD_SUCCESS;
}

/* RIPng garbage timer setup. */
DEFUN (ripng_garbage_timer,
       ripng_garbage_timer_cmd,
       "garbage-timer SECOND",
       "Set RIPng garbage timer in seconds\n"
       "Seconds\n")
{
  unsigned long garbage;
  char *endptr = NULL;

  garbage = strtoul (argv[0], &endptr, 10);
  if (garbage == ULONG_MAX || *endptr != '\0')
    {
      vty_out (vty, "garbage timer value error%s", VTY_NEWLINE);
      return CMD_WARNING;
    }

  ripng->garbage_time = garbage;

  return CMD_SUCCESS;
}

DEFUN (no_ripng_garbage_timer,
       no_ripng_garbage_timer_cmd,
       "no garbage-timer SECOND",
       NO_STR
       "Unset RIPng garbage timer in seconds\n"
       "Seconds\n")
{
  ripng->garbage_time = RIPNG_GARBAGE_TIMER_DEFAULT;
  return CMD_SUCCESS;
}
#endif /* 0 */

DEFUN (ripng_timers,
       ripng_timers_cmd,
       "timers basic <0-65535> <0-65535> <0-65535>",
       "RIPng timers setup\n"
       "Basic timer\n"
       "Routing table update timer value in second. Default is 30.\n"
       "Routing information timeout timer. Default is 180.\n"
       "Garbage collection timer. Default is 120.\n")
{
  unsigned long update;
  unsigned long timeout;
  unsigned long garbage;
  char *endptr = NULL;

  update = strtoul (argv[0], &endptr, 10);
  if (update == ULONG_MAX || *endptr != '\0')
    {
      vty_out (vty, "update timer value error%s", VTY_NEWLINE);
      return CMD_WARNING;
    }
  
  timeout = strtoul (argv[1], &endptr, 10);
  if (timeout == ULONG_MAX || *endptr != '\0')
    {
      vty_out (vty, "timeout timer value error%s", VTY_NEWLINE);
      return CMD_WARNING;
    }
  
  garbage = strtoul (argv[2], &endptr, 10);
  if (garbage == ULONG_MAX || *endptr != '\0')
    {
      vty_out (vty, "garbage timer value error%s", VTY_NEWLINE);
      return CMD_WARNING;
    }

  /* Set each timer value. */
  ripng->update_time = update;
  ripng->timeout_time = timeout;
  ripng->garbage_time = garbage;

  /* Reset update timer thread. */
  ripng_event (RIPNG_UPDATE_EVENT, 0);

  return CMD_SUCCESS;
}

DEFUN (no_ripng_timers,
       no_ripng_timers_cmd,
       "no timers basic",
       NO_STR
       "RIPng timers setup\n"
       "Basic timer\n")
{
  /* Set each timer value to the default. */
  ripng->update_time = RIPNG_UPDATE_TIMER_DEFAULT;
  ripng->timeout_time = RIPNG_TIMEOUT_TIMER_DEFAULT;
  ripng->garbage_time = RIPNG_GARBAGE_TIMER_DEFAULT;

  /* Reset update timer thread. */
  ripng_event (RIPNG_UPDATE_EVENT, 0);

  return CMD_SUCCESS;
}


DEFUN (show_ipv6_protocols, show_ipv6_protocols_cmd,
       "show ipv6 protocols",
       SHOW_STR
       IP_STR
       "Routing protocol information")
{
  if (! ripng)
    return CMD_SUCCESS;

  vty_out (vty, "Routing Protocol is \"ripng\"%s", VTY_NEWLINE);
  
  vty_out (vty, "Sending updates every %ld seconds, next due in %d seconds%s",
	   ripng->update_time, 0,
	   VTY_NEWLINE);

  vty_out (vty, "Timerout after %ld seconds, garbage correct %ld%s",
	   ripng->timeout_time,
	   ripng->garbage_time,
	   VTY_NEWLINE);

  vty_out (vty, "Outgoing update filter list for all interfaces is not set");
  vty_out (vty, "Incoming update filter list for all interfaces is not set");

  return CMD_SUCCESS;
}

/* Please be carefull to use this command. */
DEFUN (ripng_default_information_originate,
       ripng_default_information_originate_cmd,
       "default-information originate",
       "Default route information\n"
       "Distribute default route\n")
{
  struct prefix_ipv6 p;

  ripng->default_information = 1;

  str2prefix_ipv6 ("::/0", &p);
  ripng_redistribute_add (ZEBRA_ROUTE_RIPNG, RIPNG_ROUTE_STATIC, &p, 0);

  return CMD_SUCCESS;
}

DEFUN (no_ripng_default_information_originate,
       no_ripng_default_information_originate_cmd,
       "no default-information originate",
       NO_STR
       "Default route information\n"
       "Distribute default route\n")
{
  struct prefix_ipv6 p;

  ripng->default_information = 0;

  str2prefix_ipv6 ("::/0", &p);
  ripng_redistribute_delete (ZEBRA_ROUTE_RIPNG, RIPNG_ROUTE_STATIC, &p, 0);

  return CMD_SUCCESS;
}

/* RIPng configuration write function. */
int
ripng_config_write (struct vty *vty)
{
  int ripng_network_write (struct vty *);
  void ripng_redistribute_write (struct vty *);
  int write = 0;
  struct route_node *rp;

  if (ripng)
    {

      /* RIPng router. */
      vty_out (vty, "router ripng%s", VTY_NEWLINE);

      if (ripng->default_information)
	vty_out (vty, " default-information originate%s", VTY_NEWLINE);

      ripng_network_write (vty);

      /* RIPng default metric configuration */
      if (ripng->default_metric != RIPNG_DEFAULT_METRIC_DEFAULT)
        vty_out (vty, " default-metric %d%s",
		 ripng->default_metric, VTY_NEWLINE);

      ripng_redistribute_write (vty);
      
      /* RIPng aggregate routes. */
      for (rp = route_top (ripng->aggregate); rp; rp = route_next (rp))
	if (rp->info != NULL)
	  vty_out (vty, " aggregate-address %s/%d%s", 
		   inet6_ntop (&rp->p.u.prefix6),
		   rp->p.prefixlen, 

		   VTY_NEWLINE);

      /* RIPng static routes. */
      for (rp = route_top (ripng->route); rp; rp = route_next (rp))
	if (rp->info != NULL)
	  vty_out (vty, " route %s/%d%s", inet6_ntop (&rp->p.u.prefix6),
		   rp->p.prefixlen,
		   VTY_NEWLINE);

      /* RIPng timers configuration. */
      if (ripng->update_time != RIPNG_UPDATE_TIMER_DEFAULT ||
	  ripng->timeout_time != RIPNG_TIMEOUT_TIMER_DEFAULT ||
	  ripng->garbage_time != RIPNG_GARBAGE_TIMER_DEFAULT)
	{
	  vty_out (vty, " timers basic %ld %ld %ld%s",
		   ripng->update_time,
		   ripng->timeout_time,
		   ripng->garbage_time,
		   VTY_NEWLINE);
	}
#if 0
      if (ripng->update_time != RIPNG_UPDATE_TIMER_DEFAULT)
	vty_out (vty, " update-timer %d%s", ripng->update_time,
		 VTY_NEWLINE);
      if (ripng->timeout_time != RIPNG_TIMEOUT_TIMER_DEFAULT)
	vty_out (vty, " timeout-timer %d%s", ripng->timeout_time,
		 VTY_NEWLINE);
      if (ripng->garbage_time != RIPNG_GARBAGE_TIMER_DEFAULT)
	vty_out (vty, " garbage-timer %d%s", ripng->garbage_time,
		 VTY_NEWLINE);
#endif /* 0 */

      write += config_write_distribute (vty);

      write += config_write_if_rmap (vty);

      write++;
    }
  return write;
}

/* RIPng node structure. */
struct cmd_node cmd_ripng_node =
{
  RIPNG_NODE,
  "%s(config-router)# ",
  1,
};

void
ripng_distribute_update (struct distribute *dist)
{
  struct interface *ifp;
  struct ripng_interface *ri;
  struct access_list *alist;
  struct prefix_list *plist;

  if (! dist->ifname)
    return;

  ifp = if_lookup_by_name (dist->ifname);
  if (ifp == NULL)
    return;

  ri = ifp->info;

  if (dist->list[DISTRIBUTE_IN])
    {
      alist = access_list_lookup (AFI_IP6, dist->list[DISTRIBUTE_IN]);
      if (alist)
	ri->list[RIPNG_FILTER_IN] = alist;
      else
	ri->list[RIPNG_FILTER_IN] = NULL;
    }
  else
    ri->list[RIPNG_FILTER_IN] = NULL;

  if (dist->list[DISTRIBUTE_OUT])
    {
      alist = access_list_lookup (AFI_IP6, dist->list[DISTRIBUTE_OUT]);
      if (alist)
	ri->list[RIPNG_FILTER_OUT] = alist;
      else
	ri->list[RIPNG_FILTER_OUT] = NULL;
    }
  else
    ri->list[RIPNG_FILTER_OUT] = NULL;

  if (dist->prefix[DISTRIBUTE_IN])
    {
      plist = prefix_list_lookup (AFI_IP6, dist->prefix[DISTRIBUTE_IN]);
      if (plist)
	ri->prefix[RIPNG_FILTER_IN] = plist;
      else
	ri->prefix[RIPNG_FILTER_IN] = NULL;
    }
  else
    ri->prefix[RIPNG_FILTER_IN] = NULL;

  if (dist->prefix[DISTRIBUTE_OUT])
    {
      plist = prefix_list_lookup (AFI_IP6, dist->prefix[DISTRIBUTE_OUT]);
      if (plist)
	ri->prefix[RIPNG_FILTER_OUT] = plist;
      else
	ri->prefix[RIPNG_FILTER_OUT] = NULL;
    }
  else
    ri->prefix[RIPNG_FILTER_OUT] = NULL;
}
void
ripng_distribute_update_interface (struct interface *ifp)
{
  struct distribute *dist;

  dist = distribute_lookup (ifp->name);
  if (dist)
    ripng_distribute_update (dist);
}

/* Update all interface's distribute list. */
void
ripng_distribute_update_all ()
{
  struct interface *ifp;
  listnode node;

  for (node = listhead (iflist); node; nextnode (node))
    {
      ifp = getdata (node);
      ripng_distribute_update_interface (ifp);
    }
}

void
ripng_if_rmap_update (struct if_rmap *if_rmap)
{
  struct interface *ifp;
  struct ripng_interface *ri;
  struct route_map *rmap;

  ifp = if_lookup_by_name (if_rmap->ifname);
  if (ifp == NULL)
    return;

  ri = ifp->info;

  if (if_rmap->routemap[IF_RMAP_IN])
    {
      rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_IN]);
      if (rmap)
	ri->routemap[IF_RMAP_IN] = rmap;
      else
	ri->routemap[IF_RMAP_IN] = NULL;
    }
  else
    ri->routemap[RIPNG_FILTER_IN] = NULL;

  if (if_rmap->routemap[IF_RMAP_OUT])
    {
      rmap = route_map_lookup_by_name (if_rmap->routemap[IF_RMAP_OUT]);
      if (rmap)
	ri->routemap[IF_RMAP_OUT] = rmap;
      else
	ri->routemap[IF_RMAP_OUT] = NULL;
    }
  else
    ri->routemap[RIPNG_FILTER_OUT] = NULL;
}

void
ripng_if_rmap_update_interface (struct interface *ifp)
{
  struct if_rmap *if_rmap;

  if_rmap = if_rmap_lookup (ifp->name);
  if (if_rmap)
    ripng_if_rmap_update (if_rmap);
}

void
ripng_routemap_update_redistribute (void)
{
  int i;

  if (ripng)
    {
      for (i = 0; i < ZEBRA_ROUTE_MAX; i++) 
	{
	  if (ripng->route_map[i].name)
	    ripng->route_map[i].map = 
	      route_map_lookup_by_name (ripng->route_map[i].name);
	}
    }
}

void
ripng_routemap_update ()
{
  struct interface *ifp;
  listnode node;

  for (node = listhead (iflist); node; nextnode (node))
    {
      ifp = getdata (node);
      ripng_if_rmap_update_interface (ifp);
    }

  ripng_routemap_update_redistribute ();
}

/* Initialize ripng structure and set commands. */
void
ripng_init ()
{
  /* Randomize. */
  srand (time (NULL));

  /* Install RIPNG_NODE. */
  install_node (&cmd_ripng_node, ripng_config_write);

  /* Install ripng commands. */
  install_element (VIEW_NODE, &show_ipv6_ripng_cmd);

  install_element (ENABLE_NODE, &show_ipv6_ripng_cmd);

  install_element (CONFIG_NODE, &router_ripng_cmd);

  install_default (RIPNG_NODE);
  install_element (RIPNG_NODE, &ripng_route_cmd);
  install_element (RIPNG_NODE, &no_ripng_route_cmd);
  install_element (RIPNG_NODE, &ripng_aggregate_address_cmd);
  install_element (RIPNG_NODE, &no_ripng_aggregate_address_cmd);

  install_element (RIPNG_NODE, &ripng_default_metric_cmd);
  install_element (RIPNG_NODE, &no_ripng_default_metric_cmd);
  install_element (RIPNG_NODE, &no_ripng_default_metric_val_cmd);

  install_element (RIPNG_NODE, &ripng_timers_cmd);
  install_element (RIPNG_NODE, &no_ripng_timers_cmd);
#if 0
  install_element (RIPNG_NODE, &ripng_update_timer_cmd);
  install_element (RIPNG_NODE, &no_ripng_update_timer_cmd);
  install_element (RIPNG_NODE, &ripng_timeout_timer_cmd);
  install_element (RIPNG_NODE, &no_ripng_timeout_timer_cmd);
  install_element (RIPNG_NODE, &ripng_garbage_timer_cmd);
  install_element (RIPNG_NODE, &no_ripng_garbage_timer_cmd);
#endif /* 0 */

  install_element (RIPNG_NODE, &ripng_default_information_originate_cmd);
  install_element (RIPNG_NODE, &no_ripng_default_information_originate_cmd);

  ripng_if_init ();
  ripng_debug_init ();

  /* Access list install. */
  access_list_init ();
  access_list_add_hook (ripng_distribute_update_all);
  access_list_delete_hook (ripng_distribute_update_all);

  /* Prefix list initialize.*/
  prefix_list_init ();
  prefix_list_add_hook (ripng_distribute_update_all);
  prefix_list_delete_hook (ripng_distribute_update_all);

  /* Distribute list install. */
  distribute_list_init (RIPNG_NODE);
  distribute_list_add_hook (ripng_distribute_update);
  distribute_list_delete_hook (ripng_distribute_update);

  /* Route-map for interface. */
  ripng_route_map_init ();
  rout