arp.c

wm PNE 3.3 source code, running at more than vxworks6.x version.

/* $Header: /usr/cvsroot/target/src/wrn/wm/demo/snmptalk/arp.c,v 1.3 2002/03/11 19:17:06 josh Exp $ */

/*
 * Copyright (C) 1999-2005 Wind River Systems, Inc.
 * All rights reserved.  Provided under license only.
 * Distribution or other use of this software is only
 * permitted pursuant to the terms of a license agreement
 * from Wind River Systems (and is otherwise prohibited).
 * Refer to that license agreement for terms of use.
 */


/****************************************************************************
 *  Copyright 1991-1997 Epilogue Technology Corporation.
 *  Copyright 1998 Integrated Systems, Inc.
 *  All rights reserved.
 ****************************************************************************/

/* dump the arp table */

/*
 * $Log: arp.c,v $
 * Revision 1.3  2002/03/11 19:17:06  josh
 * snmptalk's destination address is now stored and passed around
 * as an ipaddr_t.  This required changes to a lot of internal function
 * calls that used to expect an inaddr_t to be passed around.  Also,
 * snmptalk is now capable of using IPv6 sockets
 *
 * Revision 1.2  2001/11/08 16:47:21  tneale
 * Updated for newset file layout
 *
 * Revision 1.1.1.1  2001/11/05 17:49:11  tneale
 * Tornado shuffle
 *
 * Revision 7.10  2001/01/19 22:24:42  paul
 * Update copyright.
 *
 * Revision 7.9  2000/03/17 00:14:32  meister
 * Update copyright message
 *
 * Revision 7.8  1998/06/23 20:56:41  sar
 * Moved parse.h to snark/h/parse.h
 *
 * Revision 7.7  1998/02/25 04:57:52  sra
 * Update copyrights.
 *
 * Revision 7.6  1997/03/20 06:53:43  sra
 * DFARS-safe copyright text.  Zap!
 *
 * Revision 7.5  1997/02/25 10:58:16  sra
 * Update copyright notice, dust under the bed.
 *
 * Revision 7.4  1997/02/19 08:10:29  sra
 * More fun merging snmptalk into snark, general snark cleanup.
 *
 * Revision 7.3  1997/01/09 22:44:19  sar
 * Modified the command calling sequence again, this time to mathc
 * what snark was using.
 *
 * Revision 7.2  1997/01/08  23:26:53  sar
 * Updated include files to use envoy/h as appropriate after
 * move from envoy/utils to snark/snmptalk
 *
 * Revision 7.1  1997/01/08  01:55:00  sar
 * Modified to use the snark sty driver for in/output
 *
 * Revision 7.0  1996/03/18  20:19:20  sar
 * Updated rev to 7.0 and copyright to 96
 *
 * Revision 6.1  1995/10/20  22:39:59  sar
 * Modified call to snmptalk_create_request
 *
 * Revision 6.0  1995/05/31  21:49:58  sra
 * Release 6.0.
 *
 * Revision 5.0  1994/05/16  15:57:40  sar
 * Updated revision to 5.0 and copyright to include 1994
 *
 * Revision 4.0  1993/06/24  17:14:56  sar
 * Updated rev to 4.0 and copyright to 93
 *
 * Revision 3.3  1993/05/19  20:38:22  sar
 * Added procedure prototypes to some of the routines. (#if !defined(NO_PP)...)
 *
 * Revision 3.2  1993/02/22  21:04:10  dab
 * Changed to use SNMPTalk_Create_Request so does either v1 or v2.
 *
 * Revision 3.1  1993/02/05  18:47:56  dab
 * Changed "system.h" to <snmptalk.h>
 *
 * Revision 3.0  1992/04/03  19:53:14  dab
 * Release 3.0
 *
 * Revision 1.5  91/11/06  13:54:09  dab
 * Added function prototypes for internal functions and other fixups so
 * pickier compilers would be happy.
 * 
 * Revision 1.4  91/11/04  16:12:58  dab
 * Improved for use with higher warning levels on the compiler.
 * 
 * Revision 1.3  91/10/30  09:19:07  dab
 * Don't do command if destination isn't set.
 * 
 * Revision 1.2  91/10/24  11:55:17  dab
 * Changed to call oidorder instead of oidcmp.
 * 
 * Revision 1.1  91/09/30  14:07:47  dab
 * Initial revision
 * 
 */

/* [clearcase]
modification history
-------------------
01a,19apr05,job  update copyright notices
*/



#include <snmptalk.h>

#include <stdio.h>

#include <wrn/wm/snmp/engine/asn1.h>
#include <wrn/wm/snmp/engine/localio.h>
#include <wrn/wm/snmp/engine/buffer.h>
#include <wrn/wm/snmp/engine/objectid.h>
#include <wrn/wm/snmp/engine/snmp.h>
#include <wrn/wm/snmp/engine/auxfuncs.h>

#include <wrn/wm/snmp/engine/buildpkt.h>

#include "md.h"
#include "snmpint.h"
#include "mibutils.h"

#include <wrn/wm/demo/snarklib.h>
#include <wrn/wm/demo/snmpconf.h>

enum help_level { help_none, help_short, help_long };

#define OIDSZ(oid) (sizeof(oid)/sizeof(OIDC_T))
#define INSTANCE(oid) (oid + OIDSZ(oid))

/* Make the typing a bit easier */
#define MIB2 1, 3, 6, 1, 2, 1
#define ip MIB2, 4
#define nmTable ip, 22
#define nmEntry nmTable, 1

/* no instance space needed */
OIDC_T nmPhys[] =               { nmEntry, 2 };
OIDC_T nmType[] =               { nmEntry, 4 };

extern int req_id;

static void
  arp_error(struct sty  *sty,
	    char *err_msg)
{
  sty_printf(sty, "%s\n", err_msg);
  command_next(sty);
}

/* Handle responses while ARP dumping.  If we're still in the ARP table then
 * print what we learned and go on to the next. */
static void
  arp_response(struct sty *sty,
	       SNMP_PKT_T *rpkt)
{
  SNMP_PKT_T *tpkt;
  VB_T *vbl;
  static char bad_type[] = "<type>";
  char pbuf[20];
  OIDC_T *oid;
  int i;
  unsigned char *cp;
  char *err_msg;
  
  /* If we get an error back from the agent. */
  if (rpkt->pdu.std_pdu.error_status != NO_ERROR) {
    print_snmp_error(sty, rpkt);
    command_next(sty);
  }
  else {
    vbl = rpkt->pdu.std_pdu.std_vbl.vblist;
    if (vbl == 0) {
      sty_puts(sty, "varbind list is empty\n");
      command_next(sty);
    }
    else {
      /* Check that we're still in the ARP table */
      oid = vbl->vb_obj_id.component_list;
      if ((vbl->vb_obj_id.num_components < OIDSZ(nmType)) ||
	  (oidorder(nmType, oid, OIDSZ(nmType)) != 0)) {
	command_next(sty);
      }
      else {
	/* Packet for next row */
	tpkt = SNMPTalk_Create_Request(GET_NEXT_REQUEST_PDU, 2, 0, 0);
	
	/* nmType */
	if (vbl->vb_data_flags_n_type != VT_NUMBER)
	  sty_printf(sty, "%-10s  ", bad_type);
	else {
	  int2string(nmType, OIDSZ(nmType), vbl->value_u.v_number,
		     pbuf, sizeof(pbuf), 1);
	  sty_printf(sty, "%-10s  ", pbuf);
	}
	
	SNMP_Bind_Null(tpkt, 0, vbl->vb_obj_id.num_components,
		       vbl->vb_obj_id.component_list);/* get next one */
	
	/* Show the instance (IP address) */
	sprintf(pbuf, "%d.%d.%d.%d", 
		(int)*(oid + OIDSZ(nmType) + 1),
		(int)*(oid + OIDSZ(nmType) + 2),
		(int)*(oid + OIDSZ(nmType) + 3),
		(int)*(oid + OIDSZ(nmType) + 4));
	sty_printf(sty, "%15s   ", pbuf);
	
	/* nmPhys */
	vbl++;
	sty_printf(sty, "-- ");
	if (vbl->vb_data_flags_n_type != VT_STRING)
	  sty_printf(sty, "%10s\n", bad_type);
	else {
	  cp = vbl->value_u.v_string.start_bp;
	  for (i = EBufferUsed(&vbl->value_u.v_string); i; i--)
	    sty_printf(sty, "%02x%c", *cp++, i > 1 ? ':' : '\n');
	}
	
	SNMP_Bind_Null(tpkt, 1, vbl->vb_obj_id.num_components,
		       vbl->vb_obj_id.component_list);/* get next one */
	
	/* Get next row */
	err_msg = snmp_send_rec(sty, tpkt, &dest_addr, arp_response,
				arp_error);
	if (err_msg) {
	  sty_printf(sty, "%s\n", err_msg);
	  command_next(sty);
	}
      }
    }
  }
  
  SNMP_Free(rpkt);
}

boolean_t
  do_arp(struct sty *sty,
	 enum help_level help,
	 int argc,
	 char *argv[])
{
  SNMP_PKT_T *tpkt;
  char *err_msg;
  
  switch (help) {
   case help_short:
    sty_puts(sty, "arp - dump ARP cache\n");
    break;
    
   case help_long:
    sty_puts(sty, "\
The 'arp' command gets the data from the destination's\n\
ARP table and prints it.\n");
    break;
    
   case help_none:
    if (!destination) {
      sty_puts(sty, "Need to specify destination first\n");
      return 1;
    }
    
    /* Create the first request. */
    tpkt = SNMPTalk_Create_Request(GET_NEXT_REQUEST_PDU, 2, 0, 0);
    
    SNMP_Bind_Null(tpkt, /* index to set */ 0, OIDSZ(nmType), nmType);
    SNMP_Bind_Null(tpkt, /* index to set */ 1, OIDSZ(nmPhys), nmPhys);
    
    err_msg = snmp_send_rec(sty, tpkt, &dest_addr, arp_response, arp_error);
    if (err_msg) {
      sty_printf(sty, "%s\n", err_msg);
      return(1);
    }
    return(0);
  }
  return(1);
}