/**************************************************************************** ** File: ipx.c**** Author: Mike Borella**** Comments: Dump IPX header information**** $Log: ipx.c,v $** Revision 1.2  2000/10/27 00:11:21  qweaver****** Rolled back to the pristine ipgrab-0.8.2 source.**** 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;}