_ipx.c

This directory contains source code for tcpdump, a tool for network monitoring and data acquisition

/* 
 * Copyright (c) 1994, 1995, 1996
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

/* 
 * Format and print Novell IPX packets.
 * Contributed by Brad Parker ([e-mail]).
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <netinet/in.h>

#include "interfac.h"
#include "a2name.h"
#include "ipx.h"
#include "extract.h"


const char *ipxaddr_string(u_int, const u_char *);
void        ipx_decode    (const struct ipxHdr *, const u_char *, u_int);
void        ipx_sap_print (const u_short *, u_int);
void        ipx_rip_print (const u_short *, u_int);

/* 
 * Print IPX datagram packets.
 */
void ipx_print (const u_char * p, u_int length)
{
  const struct ipxHdr *ipx = (const struct ipxHdr *) p;

  TCHECK (ipx->srcSkt);
  PRINTF ("%s.%x > ",
          ipxaddr_string (EXTRACT_32BITS (ipx->srcNet), ipx->srcNode),
          EXTRACT_16BITS (&ipx->srcSkt));

  PRINTF ("%s.%x:",
          ipxaddr_string (EXTRACT_32BITS (ipx->dstNet), ipx->dstNode),
          EXTRACT_16BITS (&ipx->dstSkt));

  /* take length from ipx header */
  TCHECK (ipx->length);
  length = EXTRACT_16BITS (&ipx->length);

  ipx_decode (ipx, (u_char *) ipx + ipxSize, length - ipxSize);
  return;
trunc:
  PRINTF ("[|ipx %d]", length);
}

const char *ipxaddr_string (u_int net, const u_char *node)
{
  static char line[256];

  sprintf (line, "%x.%02x:%02x:%02x:%02x:%02x:%02x",
           net, node[0], node[1], node[2], node[3], node[4], node[5]);
  return (line);
}

void ipx_decode (const struct ipxHdr *ipx, const u_char * datap, u_int length)
{
  u_short dstSkt;

  dstSkt = EXTRACT_16BITS (&ipx->dstSkt);
  switch (dstSkt)
  {
    case IPX_SKT_NCP:
         PRINTF (" ipx-ncp %d", length);
         break;
    case IPX_SKT_SAP:
         ipx_sap_print ((u_short *) datap, length);
         break;
    case IPX_SKT_RIP:
         ipx_rip_print ((u_short *) datap, length);
         break;
    case IPX_SKT_NETBIOS:
         PRINTF (" ipx-netbios %d", length);
         break;
    case IPX_SKT_DIAGNOSTICS:
         PRINTF (" ipx-diags %d", length);
         break;
    default:
         PRINTF (" ipx-#%x %d", dstSkt, length);
         break;
  }
}

void ipx_sap_print (const u_short * ipx, u_int length)
{
  int command, i;

  TCHECK (ipx[0]);
  command = EXTRACT_16BITS (ipx);
  ipx++;
  length -= 2;

  switch (command)
  {
    case 1:
    case 3:
         if (command == 1)
              PUTS ("ipx-sap-req");
         else PUTS ("ipx-sap-nearest-req");

         if (length > 0)
         {
           TCHECK (ipx[1]);
           PRINTF (" %x '", EXTRACT_16BITS (&ipx[0]));
           fn_print ((char*)&ipx[1], (char*)&ipx[1] + 48);
           PUTCHAR ('\'');
         }
         break;

    case 2:
    case 4:
         if (command == 2)
              PUTS ("ipx-sap-resp");
         else PUTS ("ipx-sap-nearest-resp");

         for (i = 0; i < 8 && length > 0; i++)
         {
           TCHECK2 (ipx[27], 1);
           PRINTF (" %x '", EXTRACT_16BITS (&ipx[0]));
           fn_print ((char *) &ipx[1], (char *) &ipx[1] + 48);
           PRINTF ("' addr %s",
                   ipxaddr_string(EXTRACT_32BITS(&ipx[25]),(u_char*)&ipx[27]));
           ipx += 32;
           length -= 64;
         }
         break;
    default:
         PRINTF ("ipx-sap-?%x", command);
         break;
  }
  return;
trunc:
  PRINTF ("[|ipx %d]", length);
}

void ipx_rip_print (const u_short * ipx, u_int length)
{
  int command, i;

  TCHECK (ipx[0]);
  command = EXTRACT_16BITS (ipx);
  ipx++;
  length -= 2;

  switch (command)
  {
    case 1:
         PUTS ("ipx-rip-req");
         if (length > 0)
         {
           TCHECK (ipx[3]);
           PRINTF (" %lu/%d.%d", EXTRACT_32BITS (&ipx[0]),
                   EXTRACT_16BITS (&ipx[2]), EXTRACT_16BITS (&ipx[3]));
         }
         break;
    case 2:
         PUTS ("ipx-rip-resp");
         for (i = 0; i < 50 && length > 0; i++)
         {
           TCHECK (ipx[3]);
           PRINTF (" %lu/%d.%d", EXTRACT_32BITS (&ipx[0]),
                   EXTRACT_16BITS (&ipx[2]), EXTRACT_16BITS (&ipx[3]));

           ipx += 4;
           length -= 8;
         }
         break;
    default:
         PRINTF ("ipx-rip-?%x", command);
  }
  return;
trunc:
  PRINTF ("[|ipx %d]", length);
}