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 __RCSID("$NetBSD: print-rrcp.c,v 1.4 2014/11/20 03:05:03 christos Exp $"); 27 #endif 28 29 #define NETDISSECT_REWORKED 30 #ifdef HAVE_CONFIG_H 31 #include "config.h" 32 #endif 33 34 #include <tcpdump-stdinc.h> 35 36 #include "interface.h" 37 #include "addrtoname.h" 38 #include "extract.h" 39 #include "ether.h" 40 41 #define RRCP_OPCODE_MASK 0x7F /* 0x00 = hello, 0x01 = get, 0x02 = set */ 42 #define RRCP_ISREPLY 0x80 /* 0 = request to switch, 0x80 = reply from switch */ 43 44 #define RRCP_PROTO_OFFSET 0 /* proto - 1 byte, must be 1 */ 45 #define RRCP_OPCODE_ISREPLY_OFFSET 1 /* opcode and isreply flag - 1 byte */ 46 #define RRCP_AUTHKEY_OFFSET 2 /* authorization key - 2 bytes, 0x2379 by default */ 47 48 /* most packets */ 49 #define RRCP_REG_ADDR_OFFSET 4 /* register address - 2 bytes */ 50 #define RRCP_REG_DATA_OFFSET 6 /* register data - 4 bytes */ 51 #define RRCP_COOKIE1_OFFSET 10 /* 4 bytes */ 52 #define RRCP_COOKIE2_OFFSET 14 /* 4 bytes */ 53 54 /* hello reply packets */ 55 #define RRCP_DOWNLINK_PORT_OFFSET 4 /* 1 byte */ 56 #define RRCP_UPLINK_PORT_OFFSET 5 /* 1 byte */ 57 #define RRCP_UPLINK_MAC_OFFSET 6 /* 6 byte MAC address */ 58 #define RRCP_CHIP_ID_OFFSET 12 /* 2 bytes */ 59 #define RRCP_VENDOR_ID_OFFSET 14 /* 4 bytes */ 60 61 static const struct tok proto_values[] = { 62 { 1, "RRCP" }, 63 { 2, "RRCP-REP" }, 64 { 0, NULL } 65 }; 66 67 static const struct tok opcode_values[] = { 68 { 0, "hello" }, 69 { 1, "get" }, 70 { 2, "set" }, 71 { 0, NULL } 72 }; 73 74 /* 75 * Print RRCP requests 76 */ 77 void 78 rrcp_print(netdissect_options *ndo, 79 register const u_char *cp, 80 u_int length _U_) 81 { 82 const u_char *rrcp; 83 uint8_t rrcp_proto; 84 uint8_t rrcp_opcode; 85 register const struct ether_header *ep; 86 char proto_str[16]; 87 char opcode_str[32]; 88 89 ep = (const struct ether_header *)cp; 90 rrcp = cp + ETHER_HDRLEN; 91 92 ND_TCHECK(*(rrcp + RRCP_PROTO_OFFSET)); 93 rrcp_proto = *(rrcp + RRCP_PROTO_OFFSET); 94 ND_TCHECK(*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)); 95 rrcp_opcode = (*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_OPCODE_MASK; 96 ND_PRINT((ndo, "%s > %s, %s %s", 97 etheraddr_string(ndo, ESRC(ep)), 98 etheraddr_string(ndo, EDST(ep)), 99 tok2strbuf(proto_values,"RRCP-0x%02x",rrcp_proto,proto_str,sizeof(proto_str)), 100 ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY) ? "reply" : "query")); 101 if (rrcp_proto==1){ 102 ND_PRINT((ndo, ": %s", 103 tok2strbuf(opcode_values,"unknown opcode (0x%02x)",rrcp_opcode,opcode_str,sizeof(opcode_str)))); 104 } 105 if (rrcp_opcode==1 || rrcp_opcode==2){ 106 ND_TCHECK2(*(rrcp + RRCP_REG_ADDR_OFFSET), 6); 107 ND_PRINT((ndo, " addr=0x%04x, data=0x%08x", 108 EXTRACT_LE_16BITS(rrcp + RRCP_REG_ADDR_OFFSET), 109 EXTRACT_LE_32BITS(rrcp + RRCP_REG_DATA_OFFSET))); 110 } 111 if (rrcp_proto==1){ 112 ND_TCHECK2(*(rrcp + RRCP_AUTHKEY_OFFSET), 2); 113 ND_PRINT((ndo, ", auth=0x%04x", 114 EXTRACT_16BITS(rrcp + RRCP_AUTHKEY_OFFSET))); 115 } 116 if (rrcp_proto==1 && rrcp_opcode==0 && 117 ((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY)){ 118 ND_TCHECK2(*(rrcp + RRCP_VENDOR_ID_OFFSET), 4); 119 ND_PRINT((ndo, " downlink_port=%d, uplink_port=%d, uplink_mac=%s, vendor_id=%08x ,chip_id=%04x ", 120 *(rrcp + RRCP_DOWNLINK_PORT_OFFSET), 121 *(rrcp + RRCP_UPLINK_PORT_OFFSET), 122 etheraddr_string(ndo, rrcp + RRCP_UPLINK_MAC_OFFSET), 123 EXTRACT_32BITS(rrcp + RRCP_VENDOR_ID_OFFSET), 124 EXTRACT_16BITS(rrcp + RRCP_CHIP_ID_OFFSET))); 125 }else if (rrcp_opcode==1 || rrcp_opcode==2 || rrcp_proto==2){ 126 ND_TCHECK2(*(rrcp + RRCP_COOKIE2_OFFSET), 4); 127 ND_PRINT((ndo, ", cookie=0x%08x%08x ", 128 EXTRACT_32BITS(rrcp + RRCP_COOKIE2_OFFSET), 129 EXTRACT_32BITS(rrcp + RRCP_COOKIE1_OFFSET))); 130 } 131 return; 132 133 trunc: 134 ND_PRINT((ndo, "[|rrcp]")); 135 } 136