1190203Srpaulo/* 2190203Srpaulo * Copyright (c) 1998-2007 The TCPDUMP project 3190203Srpaulo * 4190203Srpaulo * Redistribution and use in source and binary forms, with or without 5190203Srpaulo * modification, are permitted provided that: (1) source code 6190203Srpaulo * distributions retain the above copyright notice and this paragraph 7190203Srpaulo * in its entirety, and (2) distributions including binary code include 8190203Srpaulo * the above copyright notice and this paragraph in its entirety in 9190203Srpaulo * the documentation or other materials provided with the distribution. 10190203Srpaulo * THIS SOFTWARE IS PROVIDED ``AS IS'' AND 11190203Srpaulo * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT 12190203Srpaulo * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 13190203Srpaulo * FOR A PARTICULAR PURPOSE. 14190203Srpaulo * 15190203Srpaulo * Dynamic Trunk Protocol (DTP) 16190203Srpaulo * 17190203Srpaulo * Original code by Carles Kishimoto <carles.kishimoto@gmail.com> 18190203Srpaulo */ 19190203Srpaulo 20276788Sdelphij#define NETDISSECT_REWORKED 21190203Srpaulo#ifdef HAVE_CONFIG_H 22190203Srpaulo#include "config.h" 23190203Srpaulo#endif 24190203Srpaulo 25190203Srpaulo#include <tcpdump-stdinc.h> 26190203Srpaulo 27190203Srpaulo#include "interface.h" 28190203Srpaulo#include "addrtoname.h" 29276788Sdelphij#include "extract.h" 30190203Srpaulo 31190203Srpaulo#define DTP_HEADER_LEN 1 32190203Srpaulo#define DTP_DOMAIN_TLV 0x0001 33190203Srpaulo#define DTP_STATUS_TLV 0x0002 34190203Srpaulo#define DTP_DTP_TYPE_TLV 0x0003 35190203Srpaulo#define DTP_NEIGHBOR_TLV 0x0004 36190203Srpaulo 37276788Sdelphijstatic const struct tok dtp_tlv_values[] = { 38190203Srpaulo { DTP_DOMAIN_TLV, "Domain TLV"}, 39190203Srpaulo { DTP_STATUS_TLV, "Status TLV"}, 40190203Srpaulo { DTP_DTP_TYPE_TLV, "DTP type TLV"}, 41190203Srpaulo { DTP_NEIGHBOR_TLV, "Neighbor TLV"}, 42190203Srpaulo { 0, NULL} 43190203Srpaulo}; 44190203Srpaulo 45190203Srpaulovoid 46276788Sdelphijdtp_print (netdissect_options *ndo, const u_char *pptr, u_int length) 47190203Srpaulo{ 48190203Srpaulo int type, len; 49190203Srpaulo const u_char *tptr; 50190203Srpaulo 51190203Srpaulo if (length < DTP_HEADER_LEN) 52190203Srpaulo goto trunc; 53190203Srpaulo 54276788Sdelphij tptr = pptr; 55190203Srpaulo 56276788Sdelphij ND_TCHECK2(*tptr, DTP_HEADER_LEN); 57190203Srpaulo 58276788Sdelphij ND_PRINT((ndo, "DTPv%u, length %u", 59190203Srpaulo (*tptr), 60276788Sdelphij length)); 61190203Srpaulo 62190203Srpaulo /* 63190203Srpaulo * In non-verbose mode, just print version. 64190203Srpaulo */ 65276788Sdelphij if (ndo->ndo_vflag < 1) { 66190203Srpaulo return; 67190203Srpaulo } 68190203Srpaulo 69190203Srpaulo tptr += DTP_HEADER_LEN; 70190203Srpaulo 71190203Srpaulo while (tptr < (pptr+length)) { 72190203Srpaulo 73276788Sdelphij ND_TCHECK2(*tptr, 4); 74190203Srpaulo 75190203Srpaulo type = EXTRACT_16BITS(tptr); 76276788Sdelphij len = EXTRACT_16BITS(tptr+2); 77190203Srpaulo 78190203Srpaulo /* infinite loop check */ 79190203Srpaulo if (type == 0 || len == 0) { 80190203Srpaulo return; 81190203Srpaulo } 82190203Srpaulo 83276788Sdelphij ND_PRINT((ndo, "\n\t%s (0x%04x) TLV, length %u", 84190203Srpaulo tok2str(dtp_tlv_values, "Unknown", type), 85276788Sdelphij type, len)); 86190203Srpaulo 87190203Srpaulo switch (type) { 88190203Srpaulo case DTP_DOMAIN_TLV: 89276788Sdelphij ND_PRINT((ndo, ", %s", tptr+4)); 90190203Srpaulo break; 91190203Srpaulo 92276788Sdelphij case DTP_STATUS_TLV: 93190203Srpaulo case DTP_DTP_TYPE_TLV: 94276788Sdelphij ND_PRINT((ndo, ", 0x%x", *(tptr+4))); 95190203Srpaulo break; 96190203Srpaulo 97190203Srpaulo case DTP_NEIGHBOR_TLV: 98276788Sdelphij ND_PRINT((ndo, ", %s", etheraddr_string(ndo, tptr+4))); 99190203Srpaulo break; 100190203Srpaulo 101190203Srpaulo default: 102190203Srpaulo break; 103276788Sdelphij } 104190203Srpaulo tptr += len; 105190203Srpaulo } 106190203Srpaulo 107190203Srpaulo return; 108190203Srpaulo 109190203Srpaulo trunc: 110276788Sdelphij ND_PRINT((ndo, "[|dtp]")); 111190203Srpaulo} 112190203Srpaulo 113190203Srpaulo/* 114190203Srpaulo * Local Variables: 115190203Srpaulo * c-style: whitesmith 116190203Srpaulo * c-basic-offset: 4 117190203Srpaulo * End: 118190203Srpaulo */ 119