bgp_debug.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

/* BGP-4, BGP-4+ packet debug routine
   Copyright (C) 1996, 97, 99 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 "version.h"
#include "prefix.h"
#include "linklist.h"
#include "stream.h"
#include "command.h"
#include "str.h"
#include "log.h"
#include "sockunion.h"

#include "bgpd/bgpd.h"
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_community.h"

unsigned long conf_bgp_debug_fsm;
unsigned long conf_bgp_debug_events;
unsigned long conf_bgp_debug_packet;
unsigned long conf_bgp_debug_filter;
unsigned long conf_bgp_debug_keepalive;
unsigned long conf_bgp_debug_update;
unsigned long conf_bgp_debug_normal;

unsigned long term_bgp_debug_fsm;
unsigned long term_bgp_debug_events;
unsigned long term_bgp_debug_packet;
unsigned long term_bgp_debug_filter;
unsigned long term_bgp_debug_keepalive;
unsigned long term_bgp_debug_update;
unsigned long term_bgp_debug_normal;

/* messages for BGP-4 status */
struct message bgp_status_msg[] = 
  {
    { 0, "null" },
    { Idle, "Idle" },
    { Connect, "Connect" },
    { Active, "Active" },
    { OpenSent, "OpenSent" },
    { OpenConfirm, "OpenConfirm" },
    { Established, "Established" },
  };
int bgp_status_msg_max = BGP_STATUS_MAX;

/* BGP message type string. */
char *bgp_type_str[] =
  {
    NULL,
    "OPEN",
    "UPDATE",
    "NOTIFICATION",
    "KEEPALIVE",
    "ROUTE-REFRESH",
    "CAPABILITY"
  };

/* message for BGP-4 Notify */
struct message bgp_notify_msg[] = 
  {
    { 0, "" },
    { BGP_NOTIFY_HEADER_ERR, "Message Header Error"},
    { BGP_NOTIFY_OPEN_ERR, "OPEN Message Error"},
    { BGP_NOTIFY_UPDATE_ERR, "UPDATE Message Error"},
    { BGP_NOTIFY_HOLD_ERR, "Hold Timer Expired"},
    { BGP_NOTIFY_FSM_ERR, "Finite State Machine Error"},
    { BGP_NOTIFY_CEASE, "Cease"},
    { BGP_NOTIFY_CAPABILITY_ERR, "CAPABILITY Message Error"},
  };
int bgp_notify_msg_max = BGP_NOTIFY_MAX;

struct message bgp_notify_head_msg[] = 
  {
    { 0, "null"},
    { BGP_NOTIFY_HEADER_NOT_SYNC, "/Connection Not Synchronized."},
    { BGP_NOTIFY_HEADER_BAD_MESLEN, "/Bad Message Length."},
    { BGP_NOTIFY_HEADER_BAD_MESTYPE, "/Bad Message Type."}
  };
int bgp_notify_head_msg_max = BGP_NOTIFY_HEADER_MAX;

struct message bgp_notify_open_msg[] = 
  {
    { 0, "null" },
    { BGP_NOTIFY_OPEN_UNSUP_VERSION, "/Unsupported Version Number." },
    { BGP_NOTIFY_OPEN_BAD_PEER_AS, "/Bad Peer AS."},
    { BGP_NOTIFY_OPEN_BAD_BGP_IDENT, "/Bad BGP Identifier."},
    { BGP_NOTIFY_OPEN_UNSUP_PARAM, "/Unsupported Optional Parameter."},
    { BGP_NOTIFY_OPEN_AUTH_FAILURE, "/Authentication Failure."},
    { BGP_NOTIFY_OPEN_UNACEP_HOLDTIME, "/Unacceptable Hold Time."}, 
    { BGP_NOTIFY_OPEN_UNSUP_CAPBL, "/Unsupported Capability."},
  };
int bgp_notify_open_msg_max = BGP_NOTIFY_OPEN_MAX;

struct message bgp_notify_update_msg[] = 
  {
    { 0, "null"}, 
    { BGP_NOTIFY_UPDATE_MAL_ATTR, "/Malformed Attribute List."},
    { BGP_NOTIFY_UPDATE_UNREC_ATTR, "/Unrecognized Well-known Attribute."},
    { BGP_NOTIFY_UPDATE_MISS_ATTR, "/Missing Well-known Attribute."},
    { BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR, "/Attribute Flags Error."},
    { BGP_NOTIFY_UPDATE_ATTR_LENG_ERR, "/Attribute Length Error."},
    { BGP_NOTIFY_UPDATE_INVAL_ORIGIN, "/Invalid ORIGIN Attribute."},
    { BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP, "/AS Routing Loop."},
    { BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP, "/Invalid NEXT_HOP Attribute."},
    { BGP_NOTIFY_UPDATE_OPT_ATTR_ERR, "/Optional Attribute Error."},
    { BGP_NOTIFY_UPDATE_INVAL_NETWORK, "/Invalid Network Field."},
    { BGP_NOTIFY_UPDATE_MAL_AS_PATH, "/Malformed AS_PATH."},
  };
int bgp_notify_update_msg_max = BGP_NOTIFY_UPDATE_MAX;

struct message bgp_notify_cease_msg[] =
  {
    { 0, ""},
    { BGP_NOTIFY_CEASE_MAX_PREFIX, "/Maximum Number of Prefixes Reached."},
    { BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN, "/Administratively Shutdown."},
    { BGP_NOTIFY_CEASE_PEER_UNCONFIG, "/Peer Unconfigured."},
    { BGP_NOTIFY_CEASE_ADMIN_RESET, "/Administratively Reset."},
    { BGP_NOTIFY_CEASE_CONNECT_REJECT, "/Connection Rejected."},
    { BGP_NOTIFY_CEASE_CONFIG_CHANGE, "/Other Configuration Change."},
    { BGP_NOTIFY_CEASE_CONNECT_COLLISION, "/Connection Collision Resolution."},
  };
int bgp_notify_cease_msg_max = BGP_NOTIFY_CEASE_MAX;

struct message bgp_notify_capability_msg[] = 
  {
    { 0, "null" },
    { BGP_NOTIFY_CAPABILITY_INVALID_ACTION, "/Invalid Action Value." },
    { BGP_NOTIFY_CAPABILITY_INVALID_LENGTH, "/Invalid Capability Length."},
    { BGP_NOTIFY_CAPABILITY_MALFORMED_CODE, "/Malformed Capability Value."},
  };
int bgp_notify_capability_msg_max = BGP_NOTIFY_CAPABILITY_MAX;

/* Origin strings. */
char *bgp_origin_str[] = {"i","e","?"};
char *bgp_origin_long_str[] = {"IGP","EGP","incomplete"};

/* Dump attribute. */
void
bgp_dump_attr (struct peer *peer, struct attr *attr, char *buf, size_t size)
{

  if (! attr)
    return;

  snprintf (buf, size, "nexthop %s", inet_ntoa (attr->nexthop));
  snprintf (buf + strlen (buf), size - strlen (buf), ", origin %s",
	    bgp_origin_str[attr->origin]);

#ifdef HAVE_IPV6
  {
    char addrbuf[BUFSIZ];

    /* Add MP case. */
    if (attr->mp_nexthop_len == 16 || attr->mp_nexthop_len == 32)
      snprintf (buf + strlen (buf), size - strlen (buf), ", mp_nexthop %s",
		inet_ntop (AF_INET6, &attr->mp_nexthop_global, 
			   addrbuf, BUFSIZ));

    if (attr->mp_nexthop_len == 32)
      snprintf (buf + strlen (buf), size - strlen (buf), "(%s)",
		inet_ntop (AF_INET6, &attr->mp_nexthop_local, 
			   addrbuf, BUFSIZ));
  }
#endif /* HAVE_IPV6 */

  if (peer_sort (peer) == BGP_PEER_IBGP)
    snprintf (buf + strlen (buf), size - strlen (buf), ", localpref %d",
	      attr->local_pref);

  if (attr->med)
    snprintf (buf + strlen (buf), size - strlen (buf), ", metric %d",
	      attr->med);

  if (attr->community) 
    snprintf (buf + strlen (buf), size - strlen (buf), ", community %s",
	      community_str (attr->community));

  if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_ATOMIC_AGGREGATE))
    snprintf (buf + strlen (buf), size - strlen (buf), ", atomic-aggregate");

  if (attr->aggregator_as)
    snprintf (buf + strlen (buf), size - strlen (buf), ", aggregated by %d %s",
	      attr->aggregator_as, inet_ntoa (attr->aggregator_addr));

  if (attr->flag & ATTR_FLAG_BIT (BGP_ATTR_ORIGINATOR_ID))
    snprintf (buf + strlen (buf), size - strlen (buf), ", originator %s",
	      inet_ntoa (attr->originator_id));

  if (attr->flag & ATTR_FLAG_BIT (BGP_ATTR_CLUSTER_LIST))
    {
      int i;

      snprintf (buf + strlen (buf), size - strlen (buf), ", clusterlist ");
      for (i = 0; i < attr->cluster->length / 4; i++)
	snprintf (buf + strlen (buf), size - strlen (buf), "%s",
		  inet_ntoa (attr->cluster->list[i]));
    }

  if (attr->aspath) 
    snprintf (buf + strlen (buf), size - strlen (buf), ", path %s",
	      aspath_print (attr->aspath));
}

/* dump notify packet */
void
bgp_notify_print(struct peer *peer, struct bgp_notify *bgp_notify, char *direct)
{
  char *subcode_str;

  subcode_str = "";

  switch (bgp_notify->code) 
    {
    case BGP_NOTIFY_HEADER_ERR:
      subcode_str = LOOKUP (bgp_notify_head_msg, bgp_notify->subcode);
      break;
    case BGP_NOTIFY_OPEN_ERR:
      subcode_str = LOOKUP (bgp_notify_open_msg, bgp_notify->subcode);
      break;
    case BGP_NOTIFY_UPDATE_ERR:
      subcode_str = LOOKUP (bgp_notify_update_msg, bgp_notify->subcode);
      break;
    case BGP_NOTIFY_HOLD_ERR:
      subcode_str = "";
      break;
    case BGP_NOTIFY_FSM_ERR:
      subcode_str = "";
      break;
    case BGP_NOTIFY_CEASE:
      subcode_str = LOOKUP (bgp_notify_cease_msg, bgp_notify->subcode);
      break;
    case BGP_NOTIFY_CAPABILITY_ERR:
      subcode_str = LOOKUP (bgp_notify_capability_msg, bgp_notify->subcode);
      break;
    }
  if (BGP_DEBUG (normal, NORMAL))
    plog_info (peer->log, "%s %s NOTIFICATION %d/%d (%s%s) %d bytes %s",
	       peer ? peer->host : "",
	       direct, bgp_notify->code, bgp_notify->subcode,
	       LOOKUP (bgp_notify_msg, bgp_notify->code),
	       subcode_str, bgp_notify->length,
	       bgp_notify->data ? bgp_notify->data : "");
}

/* Debug option setting interface. */
unsigned long bgp_debug_option = 0;

int  
debug (unsigned int option)
{
  return bgp_debug_option & option; 
}

DEFUN (debug_bgp_fsm,
       debug_bgp_fsm_cmd,
       "debug bgp fsm",
       DEBUG_STR
       BGP_STR
       "BGP Finite State Machine\n")
{
  if (vty->node == CONFIG_NODE)
    DEBUG_ON (fsm, FSM);
  else
    {
      TERM_DEBUG_ON (fsm, FSM);
      vty_out (vty, "BGP fsm debugging is on%s", VTY_NEWLINE);
    }
  return CMD_SUCCESS;
}

DEFUN (no_debug_bgp_fsm,
       no_debug_bgp_fsm_cmd,
       "no debug bgp fsm",
       NO_STR
       DEBUG_STR
       BGP_STR
       "Finite State Machine\n")
{
  if (vty->node == CONFIG_NODE)
    DEBUG_OFF (fsm, FSM);
  else
    {
      TERM_DEBUG_OFF (fsm, FSM);
      vty_out (vty, "BGP fsm debugging is off%s", VTY_NEWLINE);
    }
  return CMD_SUCCESS;
}

ALIAS (no_debug_bgp_fsm,
       undebug_bgp_fsm_cmd,
       "undebug bgp fsm",
       UNDEBUG_STR
       DEBUG_STR
       BGP_STR
       "Finite State Machine\n");

DEFUN (debug_bgp_events,
       debug_bgp_events_cmd,
       "debug bgp events",
       DEBUG_STR
       BGP_STR
       "BGP events\n")
{
  if (vty->node == CONFIG_NODE)
    DEBUG_ON (events, EVENTS);
  else
    {
      TERM_DEBUG_ON (events, EVENTS);
      vty_out (vty, "BGP events debugging is on%s", VTY_NEWLINE);
    }
  return CMD_SUCCESS;
}

DEFUN (no_debug_bgp_events,
       no_debug_bgp_events_cmd,
       "no debug bgp events",
       NO_STR
       DEBUG_STR
       BGP_STR
       "BGP events\n")
{
  if (vty->node == CONFIG_NODE)
    DEBUG_OFF (events, EVENTS);
  else
    {
      TERM_DEBUG_OFF (events, EVENTS);
      vty_out (vty, "BGP events debugging is off%s", VTY_NEWLINE);
    }
  return CMD_SUCCESS;
}

ALIAS (no_debug_bgp_events,
       undebug_bgp_events_cmd,
       "undebug bgp events",
       UNDEBUG_STR
       BGP_STR
       "BGP events\n");

DEFUN (debug_bgp_filter,
       debug_bgp_filter_cmd,
       "debug bgp filters",
       DEBUG_STR
       BGP_STR
       "BGP filters\n")
{