/* * Copyright (c) 1998-2007 The TCPDUMP project * * 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, and (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. * 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. * * Dynamic Trunk Protocol (DTP) * * Original code by Carles Kishimoto <carles.kishimoto@gmail.com> */#ifdef HAVE_CONFIG_H#include "config.h"#endif#include <tcpdump-stdinc.h>#include <stdio.h>#include <string.h>#include "interface.h"#include "addrtoname.h"#include "extract.h"		#include "nlpid.h"#define DTP_HEADER_LEN			1#define DTP_DOMAIN_TLV			0x0001#define DTP_STATUS_TLV			0x0002#define DTP_DTP_TYPE_TLV		0x0003#define DTP_NEIGHBOR_TLV		0x0004static struct tok dtp_tlv_values[] = {    { DTP_DOMAIN_TLV, "Domain TLV"},    { DTP_STATUS_TLV, "Status TLV"},    { DTP_DTP_TYPE_TLV, "DTP type TLV"},    { DTP_NEIGHBOR_TLV, "Neighbor TLV"},    { 0, NULL}};voiddtp_print (const u_char *pptr, u_int length){    int type, len;    const u_char *tptr;    if (length < DTP_HEADER_LEN)        goto trunc;    tptr = pptr;     if (!TTEST2(*tptr, DTP_HEADER_LEN))		goto trunc;    printf("DTPv%u, length %u",            (*tptr),           length);    /*     * In non-verbose mode, just print version.     */    if (vflag < 1) {	return;    }    tptr += DTP_HEADER_LEN;    while (tptr < (pptr+length)) {        if (!TTEST2(*tptr, 4))             goto trunc;	type = EXTRACT_16BITS(tptr);        len  = EXTRACT_16BITS(tptr+2);         /* infinite loop check */        if (type == 0 || len == 0) {            return;        }        printf("\n\t%s (0x%04x) TLV, length %u",               tok2str(dtp_tlv_values, "Unknown", type),               type, len);        switch (type) {	case DTP_DOMAIN_TLV:		printf(", %s", tptr+4);		break;	case DTP_STATUS_TLV:            	case DTP_DTP_TYPE_TLV:                printf(", 0x%x", *(tptr+4));                break;	case DTP_NEIGHBOR_TLV:                printf(", %s", etheraddr_string(tptr+4));                break;        default:            break;        }	        tptr += len;    }    return; trunc:    printf("[|dtp]");}/* * Local Variables: * c-style: whitesmith * c-basic-offset: 4 * End: */