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/****************************************************************************
** File: ipx.c
**
** Author: Mike Borella
**
** Comments: Dump IPX header information
**
** $Log: ipx.c,v $
** Revision 1.2 1998/06/12 21:01:08 mborella
** Added log tag
**
*****************************************************************************/
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include "config.h"
#include "ipx.h"
extern struct arg_t *my_args;
/*----------------------------------------------------------------------------
**
** dump_ipx()
**
** Parse IPX header and dump fields
**
**----------------------------------------------------------------------------
*/
void dump_ipx(u_char *bp, int length)
{
IPXhdr *ipx;
u_int16_t len;
u_char *cp;
void dump_spx(u_char *, u_int16_t);
void dump_ipxrip(u_char *, u_int16_t);
static const char *ipxaddr_string(u_char *);
/*
* Dump header announcement
*/
printf("-----------------------------------------------------------------\n");
printf(" IPX Header\n");
printf("-----------------------------------------------------------------\n");
/*
* View the packet as an IPX header
*/
ipx = (IPXhdr *) bp;
/*
* Check for truncated header and truncated packet
*/
if (length < sizeof(IPXHDR_SIZE))
{
printf("Truncated header, length = %d bytes\n", length);
return;
}
len = ntohs(ipx->len);
if (length < len)
{
printf("Truncated packet: length field = %d, actual length = %d\n",
len, length);
return;
}
/*
* Dump header fields
*/
if (!my_args->n)
{
printf("Checksum: %d\n", ntohs(ipx->csum));
printf("Packet length: %d\n", len);
printf("Transport control: %d\n", ipx->tc);
printf("Packet type: %d ", ipx->pt);
switch(ipx->pt)
{
case 0:
printf("(unknown)\n");
break;
case 1:
printf("(RIP)\n");
break;
case 2:
printf("(echo)\n");
break;
case 3:
printf("(error)\n");
break;
case 4:
printf("(PEP)\n");
break;
case 5:
printf("(SPX)\n");
break;
case 17:
printf("(NCP)\n");
break;
case 20:
printf("(NetBIOS)\n");
break;
default:
printf("(undefined)\n");
break;
}
printf("Destination network %x\n", ntohl(ipx->dstnet));
printf("Destination node %s\n", ipxaddr_string(ipx->dstnode));
printf("Destination port %d\n", ntohs(ipx->dstport));
printf("Source network %x\n", ntohl(ipx->srcnet));
printf("Source node %s\n", ipxaddr_string(ipx->srcnode));
printf("Source port %d\n", ntohs(ipx->srcport));
}
/*
* Hand it to the next higher level protocol.
*/
len -= IPXHDR_SIZE;
cp = (u_char *) bp + IPXHDR_SIZE;
switch (ipx->pt)
{
case 1:
dump_ipxrip(cp, len);
break;
case 5:
dump_spx(cp, len);
break;
default:
break;
}
}
/*----------------------------------------------------------------------------
**
** ipxaddr_string()
**
** Convert IPX address to hex format. Stolen from tcpdump.
**
**----------------------------------------------------------------------------
*/
static const char *ipxaddr_string(u_char *node)
{
static char line[256];
sprintf(line, "%02x:%02x:%02x:%02x:%02x:%02x", node[0], node[1],
node[2], node[3], node[4], node[5]);
return line;
}
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