print-ipx.c

来自「TCPDUMP的C语言源代码,是在数据链路层的应用」· C语言 代码 · 共 222 行

/*
 * 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]).
 */

#ifndef lint
static const char rcsid[] _U_ =
    "@(#) $Header: /tcpdump/master/tcpdump/print-ipx.c,v 1.42 2005-05-06 08:26:44 guy Exp $";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <tcpdump-stdinc.h>

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "interface.h"
#include "addrtoname.h"
#include "ipx.h"
#include "extract.h"


static const char *ipxaddr_string(u_int32_t, 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;

	if (!eflag)
		printf("IPX ");

	TCHECK(ipx->srcSkt);
	(void)printf("%s.%04x > ",
		     ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode),
		     EXTRACT_16BITS(&ipx->srcSkt));

	(void)printf("%s.%04x: ",
		     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);
}

static const char *
ipxaddr_string(u_int32_t net, const u_char *node)
{
    static char line[256];

    snprintf(line, sizeof(line), "%08x.%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)
{
    register u_short dstSkt;

    dstSkt = EXTRACT_16BITS(&ipx->dstSkt);
    switch (dstSkt) {
      case IPX_SKT_NCP:
	(void)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:
	(void)printf("ipx-netbios %d", length);
#ifdef TCPDUMP_DO_SMB
	ipx_netbios_print(datap, length);
#endif
	break;
      case IPX_SKT_DIAGNOSTICS:
	(void)printf("ipx-diags %d", length);
	break;
      case IPX_SKT_NWLINK_DGM:
	(void)printf("ipx-nwlink-dgm %d", length);
#ifdef TCPDUMP_DO_SMB
	ipx_netbios_print(datap, length);
#endif
	break;
      case IPX_SKT_EIGRP:
	eigrp_print(datap, length);
	break;
      default:
	(void)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)
	    (void)printf("ipx-sap-req");
	else
	    (void)printf("ipx-sap-nearest-req");

	TCHECK(ipx[0]);
	(void)printf(" %s", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))));
	break;

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

	for (i = 0; i < 8 && length > 0; i++) {
	    TCHECK(ipx[0]);
	    (void)printf(" %s '", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))));
	    if (fn_printzp((u_char *)&ipx[1], 48, snapend)) {
		printf("'");
		goto trunc;
	    }
	    TCHECK2(ipx[25], 10);
	    printf("' addr %s",
		ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27]));
	    ipx += 32;
	    length -= 64;
	}
	break;
      default:
	(void)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:
	(void)printf("ipx-rip-req");
	if (length > 0) {
	    TCHECK(ipx[3]);
	    (void)printf(" %u/%d.%d", EXTRACT_32BITS(&ipx[0]),
			 EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
	}
	break;
      case 2:
	(void)printf("ipx-rip-resp");
	for (i = 0; i < 50 && length > 0; i++) {
	    TCHECK(ipx[3]);
	    (void)printf(" %u/%d.%d", EXTRACT_32BITS(&ipx[0]),
			 EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));

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