1190203Srpaulo/* 2190203Srpaulo * Copyright (c) 1998-2006 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 * support for the Cisco prop. VQP Protocol 16190203Srpaulo * 17190203Srpaulo * Original code by Carles Kishimoto <Carles.Kishimoto@bsc.es> 18190203Srpaulo */ 19190203Srpaulo 20190203Srpaulo#ifndef lint 21190203Srpaulostatic const char rcsid[] _U_ = 22190203Srpaulo "@(#) $Header: /tcpdump/master/tcpdump/print-vqp.c,v 1.3 2006-08-19 06:51:13 guy Exp $"; 23190203Srpaulo#endif 24190203Srpaulo 25190203Srpaulo#ifdef HAVE_CONFIG_H 26190203Srpaulo#include "config.h" 27190203Srpaulo#endif 28190203Srpaulo 29190203Srpaulo#include <tcpdump-stdinc.h> 30190203Srpaulo 31190203Srpaulo#include <stdio.h> 32190203Srpaulo#include <stdlib.h> 33190203Srpaulo#include <string.h> 34190203Srpaulo 35190203Srpaulo#include "interface.h" 36190203Srpaulo#include "extract.h" 37190203Srpaulo#include "addrtoname.h" 38190203Srpaulo 39190203Srpaulo#define VQP_VERSION 1 40190203Srpaulo#define VQP_EXTRACT_VERSION(x) ((x)&0xFF) 41190203Srpaulo 42190203Srpaulo/* 43190203Srpaulo * VQP common header 44190203Srpaulo * 45190203Srpaulo * 0 1 2 3 46190203Srpaulo * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 47190203Srpaulo * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 48190203Srpaulo * | Constant | Packet type | Error Code | nitems | 49190203Srpaulo * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 50190203Srpaulo * | Packet Sequence Number (4 bytes) | 51190203Srpaulo * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 52190203Srpaulo */ 53190203Srpaulo 54190203Srpaulostruct vqp_common_header_t { 55190203Srpaulo u_int8_t version; 56190203Srpaulo u_int8_t msg_type; 57190203Srpaulo u_int8_t error_code; 58190203Srpaulo u_int8_t nitems; 59190203Srpaulo u_int8_t sequence[4]; 60190203Srpaulo}; 61190203Srpaulo 62190203Srpaulostruct vqp_obj_tlv_t { 63190203Srpaulo u_int8_t obj_type[4]; 64190203Srpaulo u_int8_t obj_length[2]; 65190203Srpaulo}; 66190203Srpaulo 67190203Srpaulo#define VQP_OBJ_REQ_JOIN_PORT 0x01 68190203Srpaulo#define VQP_OBJ_RESP_VLAN 0x02 69190203Srpaulo#define VQP_OBJ_REQ_RECONFIRM 0x03 70190203Srpaulo#define VQP_OBJ_RESP_RECONFIRM 0x04 71190203Srpaulo 72190203Srpaulostatic const struct tok vqp_msg_type_values[] = { 73190203Srpaulo { VQP_OBJ_REQ_JOIN_PORT, "Request, Join Port"}, 74190203Srpaulo { VQP_OBJ_RESP_VLAN, "Response, VLAN"}, 75190203Srpaulo { VQP_OBJ_REQ_RECONFIRM, "Request, Reconfirm"}, 76190203Srpaulo { VQP_OBJ_RESP_RECONFIRM, "Response, Reconfirm"}, 77190203Srpaulo { 0, NULL} 78190203Srpaulo}; 79190203Srpaulo 80190203Srpaulostatic const struct tok vqp_error_code_values[] = { 81190203Srpaulo { 0x00, "No error"}, 82190203Srpaulo { 0x03, "Access denied"}, 83190203Srpaulo { 0x04, "Shutdown port"}, 84190203Srpaulo { 0x05, "Wrong VTP domain"}, 85190203Srpaulo { 0, NULL} 86190203Srpaulo}; 87190203Srpaulo 88190203Srpaulo/* FIXME the heading 0x0c looks ugly - those must be flags etc. */ 89190203Srpaulo#define VQP_OBJ_IP_ADDRESS 0x0c01 90190203Srpaulo#define VQP_OBJ_PORT_NAME 0x0c02 91190203Srpaulo#define VQP_OBJ_VLAN_NAME 0x0c03 92190203Srpaulo#define VQP_OBJ_VTP_DOMAIN 0x0c04 93190203Srpaulo#define VQP_OBJ_ETHERNET_PKT 0x0c05 94190203Srpaulo#define VQP_OBJ_MAC_NULL 0x0c06 95190203Srpaulo#define VQP_OBJ_MAC_ADDRESS 0x0c08 96190203Srpaulo 97190203Srpaulostatic const struct tok vqp_obj_values[] = { 98190203Srpaulo { VQP_OBJ_IP_ADDRESS, "Client IP Address" }, 99190203Srpaulo { VQP_OBJ_PORT_NAME, "Port Name" }, 100190203Srpaulo { VQP_OBJ_VLAN_NAME, "VLAN Name" }, 101190203Srpaulo { VQP_OBJ_VTP_DOMAIN, "VTP Domain" }, 102190203Srpaulo { VQP_OBJ_ETHERNET_PKT, "Ethernet Packet" }, 103190203Srpaulo { VQP_OBJ_MAC_NULL, "MAC Null" }, 104190203Srpaulo { VQP_OBJ_MAC_ADDRESS, "MAC Address" }, 105190203Srpaulo { 0, NULL} 106190203Srpaulo}; 107190203Srpaulo 108190203Srpaulovoid 109190203Srpaulovqp_print(register const u_char *pptr, register u_int len) 110190203Srpaulo{ 111190203Srpaulo const struct vqp_common_header_t *vqp_common_header; 112190203Srpaulo const struct vqp_obj_tlv_t *vqp_obj_tlv; 113190203Srpaulo 114190203Srpaulo const u_char *tptr; 115190203Srpaulo u_int16_t vqp_obj_len; 116190203Srpaulo u_int32_t vqp_obj_type; 117190203Srpaulo int tlen; 118190203Srpaulo u_int8_t nitems; 119190203Srpaulo 120190203Srpaulo tptr=pptr; 121190203Srpaulo tlen = len; 122190203Srpaulo vqp_common_header = (const struct vqp_common_header_t *)pptr; 123190203Srpaulo TCHECK(*vqp_common_header); 124190203Srpaulo 125190203Srpaulo /* 126190203Srpaulo * Sanity checking of the header. 127190203Srpaulo */ 128190203Srpaulo if (VQP_EXTRACT_VERSION(vqp_common_header->version) != VQP_VERSION) { 129190203Srpaulo printf("VQP version %u packet not supported", 130190203Srpaulo VQP_EXTRACT_VERSION(vqp_common_header->version)); 131190203Srpaulo return; 132190203Srpaulo } 133190203Srpaulo 134190203Srpaulo /* in non-verbose mode just lets print the basic Message Type */ 135190203Srpaulo if (vflag < 1) { 136190203Srpaulo printf("VQPv%u %s Message, error-code %s (%u), length %u", 137190203Srpaulo VQP_EXTRACT_VERSION(vqp_common_header->version), 138190203Srpaulo tok2str(vqp_msg_type_values, "unknown (%u)",vqp_common_header->msg_type), 139190203Srpaulo tok2str(vqp_error_code_values, "unknown (%u)",vqp_common_header->error_code), 140190203Srpaulo vqp_common_header->error_code, 141190203Srpaulo len); 142190203Srpaulo return; 143190203Srpaulo } 144190203Srpaulo 145190203Srpaulo /* ok they seem to want to know everything - lets fully decode it */ 146190203Srpaulo nitems = vqp_common_header->nitems; 147190203Srpaulo printf("\n\tVQPv%u, %s Message, error-code %s (%u), seq 0x%08x, items %u, length %u", 148190203Srpaulo VQP_EXTRACT_VERSION(vqp_common_header->version), 149190203Srpaulo tok2str(vqp_msg_type_values, "unknown (%u)",vqp_common_header->msg_type), 150190203Srpaulo tok2str(vqp_error_code_values, "unknown (%u)",vqp_common_header->error_code), 151190203Srpaulo vqp_common_header->error_code, 152190203Srpaulo EXTRACT_32BITS(&vqp_common_header->sequence), 153190203Srpaulo nitems, 154190203Srpaulo len); 155190203Srpaulo 156190203Srpaulo /* skip VQP Common header */ 157190203Srpaulo tptr+=sizeof(const struct vqp_common_header_t); 158190203Srpaulo tlen-=sizeof(const struct vqp_common_header_t); 159190203Srpaulo 160190203Srpaulo while (nitems > 0 && tlen > 0) { 161190203Srpaulo 162190203Srpaulo vqp_obj_tlv = (const struct vqp_obj_tlv_t *)tptr; 163190203Srpaulo vqp_obj_type = EXTRACT_32BITS(vqp_obj_tlv->obj_type); 164190203Srpaulo vqp_obj_len = EXTRACT_16BITS(vqp_obj_tlv->obj_length); 165190203Srpaulo tptr+=sizeof(struct vqp_obj_tlv_t); 166190203Srpaulo tlen-=sizeof(struct vqp_obj_tlv_t); 167190203Srpaulo 168190203Srpaulo printf("\n\t %s Object (0x%08x), length %u, value: ", 169190203Srpaulo tok2str(vqp_obj_values, "Unknown", vqp_obj_type), 170190203Srpaulo vqp_obj_type, vqp_obj_len); 171190203Srpaulo 172190203Srpaulo /* basic sanity check */ 173190203Srpaulo if (vqp_obj_type == 0 || vqp_obj_len ==0) { 174190203Srpaulo return; 175190203Srpaulo } 176190203Srpaulo 177190203Srpaulo /* did we capture enough for fully decoding the object ? */ 178190203Srpaulo if (!TTEST2(*tptr, vqp_obj_len)) 179190203Srpaulo goto trunc; 180190203Srpaulo 181190203Srpaulo switch(vqp_obj_type) { 182190203Srpaulo case VQP_OBJ_IP_ADDRESS: 183190203Srpaulo printf("%s (0x%08x)", ipaddr_string(tptr), EXTRACT_32BITS(tptr)); 184190203Srpaulo break; 185190203Srpaulo /* those objects have similar semantics - fall through */ 186190203Srpaulo case VQP_OBJ_PORT_NAME: 187190203Srpaulo case VQP_OBJ_VLAN_NAME: 188190203Srpaulo case VQP_OBJ_VTP_DOMAIN: 189190203Srpaulo case VQP_OBJ_ETHERNET_PKT: 190190203Srpaulo safeputs((const char *)tptr, vqp_obj_len); 191190203Srpaulo break; 192190203Srpaulo /* those objects have similar semantics - fall through */ 193190203Srpaulo case VQP_OBJ_MAC_ADDRESS: 194190203Srpaulo case VQP_OBJ_MAC_NULL: 195190203Srpaulo printf("%s", etheraddr_string(tptr)); 196190203Srpaulo break; 197190203Srpaulo default: 198190203Srpaulo if (vflag <= 1) 199190203Srpaulo print_unknown_data(tptr, "\n\t ", vqp_obj_len); 200190203Srpaulo break; 201190203Srpaulo } 202190203Srpaulo tptr += vqp_obj_len; 203190203Srpaulo tlen -= vqp_obj_len; 204190203Srpaulo nitems--; 205190203Srpaulo } 206190203Srpaulo return; 207190203Srpaulotrunc: 208190203Srpaulo printf("\n\t[|VQP]"); 209190203Srpaulo} 210