1/* 2 * Copyright (c) 2007 - Andrey "nording" Chernyak <andrew@nording.ru> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that: (1) source code distributions 6 * retain the above copyright notice and this paragraph in its entirety, (2) 7 * distributions including binary code include the above copyright notice and 8 * this paragraph in its entirety in the documentation or other materials 9 * provided with the distribution, and (3) all advertising materials mentioning 10 * features or use of this software display the following acknowledgement: 11 * ``This product includes software developed by the University of California, 12 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 13 * the University nor the names of its contributors may be used to endorse 14 * or promote products derived from this software without specific prior 15 * written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 * 20 * Format and print Realtek Remote Control Protocol (RRCP) 21 * and Realtek Echo Protocol (RRCP-REP) packets. 22 */ 23 24#include <sys/cdefs.h> 25#ifndef lint 26#if 0 27static const char rcsid[] _U_ = 28 "@(#) Header: /tcpdump/master/tcpdump/print-rrcp.c,v 1.2 2008-04-11 17:21:34 gianluca Exp"; 29#else 30__RCSID("$NetBSD$"); 31#endif 32#endif 33 34#ifdef HAVE_CONFIG_H 35#include "config.h" 36#endif 37 38#include <tcpdump-stdinc.h> 39 40#include <stdio.h> 41#include <string.h> 42 43#include "netdissect.h" 44#include "addrtoname.h" 45#include "extract.h" 46#include "ether.h" 47 48#ifndef ETH_ALEN 49#define ETH_ALEN 6 50#endif 51 52#define RRCP_OPCODE_MASK 0x7F /* 0x00 = hello, 0x01 = get, 0x02 = set */ 53#define RRCP_ISREPLY 0x80 /* 0 = request to switch, 0x80 = reply from switch */ 54 55#define RRCP_PROTO_OFFSET 0 /* proto - 1 byte, must be 1 */ 56#define RRCP_OPCODE_ISREPLY_OFFSET 1 /* opcode and isreply flag - 1 byte */ 57#define RRCP_AUTHKEY_OFFSET 2 /* authorization key - 2 bytes, 0x2379 by default */ 58 59/* most packets */ 60#define RRCP_REG_ADDR_OFFSET 4 /* register address - 2 bytes */ 61#define RRCP_REG_DATA_OFFSET 6 /* register data - 4 bytes */ 62#define RRCP_COOKIE1_OFFSET 10 /* 4 bytes */ 63#define RRCP_COOKIE2_OFFSET 14 /* 4 bytes */ 64 65/* hello reply packets */ 66#define RRCP_DOWNLINK_PORT_OFFSET 4 /* 1 byte */ 67#define RRCP_UPLINK_PORT_OFFSET 5 /* 1 byte */ 68#define RRCP_UPLINK_MAC_OFFSET 6 /* 6 byte MAC address */ 69#define RRCP_CHIP_ID_OFFSET 12 /* 2 bytes */ 70#define RRCP_VENDOR_ID_OFFSET 14 /* 4 bytes */ 71 72static const struct tok proto_values[] = { 73 { 1, "RRCP" }, 74 { 2, "RRCP-REP" }, 75 { 0, NULL } 76}; 77 78static const struct tok opcode_values[] = { 79 { 0, "hello" }, 80 { 1, "get" }, 81 { 2, "set" }, 82 { 0, NULL } 83}; 84 85/* 86 * Print RRCP requests 87 */ 88void 89rrcp_print(netdissect_options *ndo, 90 register const u_char *cp, 91 u_int length _U_) 92{ 93 const u_char *rrcp; 94 u_int8_t rrcp_proto; 95 u_int8_t rrcp_opcode; 96 register const struct ether_header *ep; 97 char proto_str[16]; 98 char opcode_str[32]; 99 100 ep = (const struct ether_header *)cp; 101 rrcp = cp + ETHER_HDRLEN; 102 103 ND_TCHECK(*(rrcp + RRCP_PROTO_OFFSET)); 104 rrcp_proto = *(rrcp + RRCP_PROTO_OFFSET); 105 ND_TCHECK(*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)); 106 rrcp_opcode = (*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_OPCODE_MASK; 107 ND_PRINT((ndo, "%s > %s, %s %s", 108 etheraddr_string(ESRC(ep)), 109 etheraddr_string(EDST(ep)), 110 tok2strbuf(proto_values,"RRCP-0x%02d",rrcp_proto,proto_str,sizeof(proto_str)), 111 ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY) ? "reply" : "query")); 112 if (rrcp_proto==1){ 113 ND_PRINT((ndo, ": %s", 114 tok2strbuf(opcode_values,"unknown opcode (0x%02d)",rrcp_opcode,opcode_str,sizeof(opcode_str)))); 115 } 116 if (rrcp_opcode==1 || rrcp_opcode==2){ 117 ND_TCHECK2(*(rrcp + RRCP_REG_ADDR_OFFSET), 6); 118 ND_PRINT((ndo, " addr=0x%04x, data=0x%08x", 119 EXTRACT_16BITS(rrcp + RRCP_REG_ADDR_OFFSET), 120 EXTRACT_32BITS(rrcp + RRCP_REG_DATA_OFFSET))); 121 } 122 if (rrcp_proto==1){ 123 ND_TCHECK2(*(rrcp + RRCP_AUTHKEY_OFFSET), 2); 124 ND_PRINT((ndo, ", auth=0x%04x", 125 EXTRACT_16BITS(rrcp + RRCP_AUTHKEY_OFFSET))); 126 } 127 if (rrcp_proto==1 && rrcp_opcode==0 && 128 ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY)){ 129 ND_TCHECK2(*(rrcp + RRCP_VENDOR_ID_OFFSET), 4); 130 ND_PRINT((ndo, " downlink_port=%d, uplink_port=%d, uplink_mac=%s, vendor_id=%08x ,chip_id=%04x ", 131 *(rrcp + RRCP_DOWNLINK_PORT_OFFSET), 132 *(rrcp + RRCP_UPLINK_PORT_OFFSET), 133 etheraddr_string(rrcp + RRCP_UPLINK_MAC_OFFSET), 134 EXTRACT_32BITS(rrcp + RRCP_VENDOR_ID_OFFSET), 135 EXTRACT_16BITS(rrcp + RRCP_CHIP_ID_OFFSET))); 136 }else if (rrcp_opcode==1 || rrcp_opcode==2 || rrcp_proto==2){ 137 ND_TCHECK2(*(rrcp + RRCP_COOKIE2_OFFSET), 4); 138 ND_PRINT((ndo, ", cookie=0x%08x%08x ", 139 EXTRACT_32BITS(rrcp + RRCP_COOKIE2_OFFSET), 140 EXTRACT_32BITS(rrcp + RRCP_COOKIE1_OFFSET))); 141 } 142 if (!ndo->ndo_vflag) 143 return; 144 return; 145 146trunc: 147 ND_PRINT((ndo, "[|rrcp]")); 148} 149