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131 lines
4.7 KiB
C
131 lines
4.7 KiB
C
/*
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* Copyright (c) 2007 - Andrey "nording" Chernyak <andrew@nording.ru>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Format and print Realtek Remote Control Protocol (RRCP)
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* and Realtek Echo Protocol (RRCP-REP) packets.
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*/
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "ether.h"
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#define RRCP_OPCODE_MASK 0x7F /* 0x00 = hello, 0x01 = get, 0x02 = set */
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#define RRCP_ISREPLY 0x80 /* 0 = request to switch, 0x80 = reply from switch */
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#define RRCP_PROTO_OFFSET 0 /* proto - 1 byte, must be 1 */
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#define RRCP_OPCODE_ISREPLY_OFFSET 1 /* opcode and isreply flag - 1 byte */
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#define RRCP_AUTHKEY_OFFSET 2 /* authorization key - 2 bytes, 0x2379 by default */
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/* most packets */
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#define RRCP_REG_ADDR_OFFSET 4 /* register address - 2 bytes */
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#define RRCP_REG_DATA_OFFSET 6 /* register data - 4 bytes */
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#define RRCP_COOKIE1_OFFSET 10 /* 4 bytes */
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#define RRCP_COOKIE2_OFFSET 14 /* 4 bytes */
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/* hello reply packets */
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#define RRCP_DOWNLINK_PORT_OFFSET 4 /* 1 byte */
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#define RRCP_UPLINK_PORT_OFFSET 5 /* 1 byte */
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#define RRCP_UPLINK_MAC_OFFSET 6 /* 6 byte MAC address */
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#define RRCP_CHIP_ID_OFFSET 12 /* 2 bytes */
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#define RRCP_VENDOR_ID_OFFSET 14 /* 4 bytes */
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static const struct tok proto_values[] = {
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{ 1, "RRCP" },
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{ 2, "RRCP-REP" },
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{ 0, NULL }
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};
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static const struct tok opcode_values[] = {
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{ 0, "hello" },
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{ 1, "get" },
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{ 2, "set" },
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{ 0, NULL }
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};
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/*
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* Print RRCP requests
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*/
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void
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rrcp_print(netdissect_options *ndo,
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register const u_char *cp,
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u_int length _U_)
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{
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const u_char *rrcp;
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uint8_t rrcp_proto;
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uint8_t rrcp_opcode;
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register const struct ether_header *ep;
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char proto_str[16];
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char opcode_str[32];
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ep = (const struct ether_header *)cp;
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rrcp = cp + ETHER_HDRLEN;
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ND_TCHECK(*(rrcp + RRCP_PROTO_OFFSET));
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rrcp_proto = *(rrcp + RRCP_PROTO_OFFSET);
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ND_TCHECK(*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET));
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rrcp_opcode = (*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_OPCODE_MASK;
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ND_PRINT((ndo, "%s > %s, %s %s",
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etheraddr_string(ndo, ESRC(ep)),
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etheraddr_string(ndo, EDST(ep)),
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tok2strbuf(proto_values,"RRCP-0x%02x",rrcp_proto,proto_str,sizeof(proto_str)),
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((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY) ? "reply" : "query"));
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if (rrcp_proto==1){
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ND_PRINT((ndo, ": %s",
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tok2strbuf(opcode_values,"unknown opcode (0x%02x)",rrcp_opcode,opcode_str,sizeof(opcode_str))));
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}
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if (rrcp_opcode==1 || rrcp_opcode==2){
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ND_TCHECK2(*(rrcp + RRCP_REG_ADDR_OFFSET), 6);
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ND_PRINT((ndo, " addr=0x%04x, data=0x%08x",
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EXTRACT_LE_16BITS(rrcp + RRCP_REG_ADDR_OFFSET),
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EXTRACT_LE_32BITS(rrcp + RRCP_REG_DATA_OFFSET)));
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}
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if (rrcp_proto==1){
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ND_TCHECK2(*(rrcp + RRCP_AUTHKEY_OFFSET), 2);
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ND_PRINT((ndo, ", auth=0x%04x",
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EXTRACT_16BITS(rrcp + RRCP_AUTHKEY_OFFSET)));
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}
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if (rrcp_proto==1 && rrcp_opcode==0 &&
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((*(rrcp + RRCP_OPCODE_ISREPLY_OFFSET)) & RRCP_ISREPLY)){
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ND_TCHECK2(*(rrcp + RRCP_VENDOR_ID_OFFSET), 4);
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ND_PRINT((ndo, " downlink_port=%d, uplink_port=%d, uplink_mac=%s, vendor_id=%08x ,chip_id=%04x ",
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*(rrcp + RRCP_DOWNLINK_PORT_OFFSET),
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*(rrcp + RRCP_UPLINK_PORT_OFFSET),
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etheraddr_string(ndo, rrcp + RRCP_UPLINK_MAC_OFFSET),
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EXTRACT_32BITS(rrcp + RRCP_VENDOR_ID_OFFSET),
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EXTRACT_16BITS(rrcp + RRCP_CHIP_ID_OFFSET)));
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}else if (rrcp_opcode==1 || rrcp_opcode==2 || rrcp_proto==2){
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ND_TCHECK2(*(rrcp + RRCP_COOKIE2_OFFSET), 4);
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ND_PRINT((ndo, ", cookie=0x%08x%08x ",
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EXTRACT_32BITS(rrcp + RRCP_COOKIE2_OFFSET),
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EXTRACT_32BITS(rrcp + RRCP_COOKIE1_OFFSET)));
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}
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return;
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trunc:
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ND_PRINT((ndo, "[|rrcp]"));
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}
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