908 lines
35 KiB
C
908 lines
35 KiB
C
/* packet-optommp.c
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* Routines for optommp dissection
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* Copyright 2014, Opto22 wiresharkdissectorcoder@gmail.com
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include "packet-tcp.h"
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#define OPTO_FRAME_HEADER_LEN 8
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#define OPTOMMP_MIN_LENGTH 12
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#define OPTOMMP_WRITE_QUADLET_REQUEST 0
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#define OPTOMMP_WRITE_BLOCK_REQUEST 1
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#define OPTOMMP_WRITE_RESPONSE 2
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#define OPTOMMP_READ_QUADLET_REQUEST 4
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#define OPTOMMP_READ_BLOCK_REQUEST 5
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#define OPTOMMP_READ_QUADLET_RESPONSE 6
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#define OPTOMMP_READ_BLOCK_RESPONSE 7
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/* Initialize the protocol and registered fields */
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static gint proto_optommp = -1;
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static dissector_handle_t optommp_tcp_handle;
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static dissector_handle_t optommp_udp_handle;
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static gint hf_optommp_nodest_id = -1;
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static gint hf_optommp_dest_id = -1;
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static gint hf_optommp_boot_id = -1;
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static gint hf_optommp_tl = -1;
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static gint hf_optommp_tcode = -1;
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static gint hf_optommp_source_ID = -1;
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static gint hf_optommp_rcode = -1;
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static gint hf_optommp_quadlet_data = -1;
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static gint hf_optommp_data_length = -1;
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static gint hf_optommp_dest_offset = -1;
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static gint hf_optommp_data_block_byte = -1;
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static gint hf_optommp_data_block_quadlet = -1;
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/* Initialize the subtree pointers */
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static gint ett_optommp = -1;
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static gint ett_dest_id = -1;
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static gint ett_data_block_q = -1;
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static gint ett_data_block_b = -1;
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static const value_string optommp_tcode_names[] = {
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{ 0, "Write Quadlet Request" },
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{ 1, "Write Block Request" },
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{ 2, "Write Response" },
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{ 4, "Read Quadlet Request" },
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{ 5, "Read Block Request" },
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{ 6, "Read Quadlet Response" },
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{ 7, "Read Block Response" },
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{ 0, NULL }
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};
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static const value_string optommp_rcode_meanings[] = {
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{ 0x0, "No error" },
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{ 0x1, "Undefined command" },
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{ 0x2, "Invalid point type" },
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{ 0x3, "Invalid float" },
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{ 0x4, "Powerup Clear expected" },
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{ 0x5, "Invalid memory address/data" },
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{ 0x6, "Invalid command length" },
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{ 0x7, "Reserved" },
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{ 0x8, "Busy" },
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{ 0x9, "Cannot erase flash" },
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{ 0xa, "Cannot program flash" },
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{ 0xb, "Downloaded image too small" },
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{ 0xc, "Image CRC mismatch" },
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{ 0xd, "Image length mismatch" },
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{ 0xe, "Feature is not yet implemented" },
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{ 0xf, "Communications watchdog timeout" },
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{ 0, NULL }
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};
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static const range_string optommp_mm_areas[] = {
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{ 0xf0100000, 0xf01bffff,
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"Expanded Analog & Digital Point Configuration - Read/Write" },
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{ 0xf01c0000, 0xf01c7fff,
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"Expanded Analog Point Calc & Set - Read/Write" },
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{ 0xf01d4000, 0xf01dffff,
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"Expanded Analog Point Read & Clear - Read/Write" },
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{ 0xf0260000, 0xf029ffff,
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"Expanded Analog Point Read - Read" },
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{ 0xf02a0000, 0xf02dffff,
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"Expanded Analog Point Write - Read/Write" },
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{ 0xf02e0000, 0xf02f7fff,
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"Expanded Digital Point Read & Clear - Read/Write" },
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{ 0xf0300000, 0xf030024b,
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"Status Area Read - Read Only" },
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{ 0xf0310400, 0xf031110f,
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"Communications Port Configuration - Read/Write" },
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{ 0xf0329000, 0xf032efff,
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"Serial Pass-Through - Read/Write" },
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{ 0xf0350000, 0xf0350023,
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"Date and Time Configuration - Read/Write" },
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{ 0xf0380000, 0xf0380297,
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"Status Area Write - Read/Write" },
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{ 0xf0390000, 0xf0390003,
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"Modbus Configuration - Read/Write" },
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{ 0xf03a0004, 0xf03a0073,
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"Network Security Configuration - Read/Write" },
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{ 0xf03a1000, 0xf03a1fff,
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"SSI Module Configuration - Read/Write" },
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{ 0xf03a7f00, 0xf03a7ffa,
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"Serial Module Identification - Read Only" },
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{ 0xf03a8000, 0xf03a840f,
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"Serial Module Configuration - Read/Write" },
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{ 0xf03a8500, 0xf03a8dc3,
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"Wiegand Serial Module Configuration - Read/Write" },
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{ 0xf03a9000, 0xf03a92bf,
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"SNAP-SCM-CAN2B Serial Module Configuration -Read/Write" },
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{ 0xf03c0000, 0xf03c030b,
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"SNMP Configuration - Read/Write" },
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{ 0xf03d0000, 0xf03d0079,
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"FTP User Name/Password Configuration - Read/Write" },
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{ 0xf03e0000, 0xf03eb107,
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"PPP Configuration - Read/Write" },
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{ 0xf03eb800, 0xf03fb827,
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"PPP Status - Read Only" },
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{ 0xf03fffc4, 0xf03fffff,
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"Streaming Configuration - Read/Write" },
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{ 0xf0400000, 0xf04001ff,
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"Digital Bank Read - Read Only" },
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{ 0xf0500000, 0xf050001f,
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"Digital Bank Write - Read/Write" },
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{ 0xf0600000, 0xf06003ff,
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"Analog Bank Read - Read Only" },
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{ 0xf0700000, 0xf07001ff,
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"Analog Bank Write - Read/Write" },
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{ 0xf0800000, 0xf0800fd3,
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"Digital Point Read - Read Only" },
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{ 0xf0900000, 0xf0900fcf,
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"Digital Point Write - Read/Write" },
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{ 0xf0a00000, 0xf0a00fcf,
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"Old Analog Point Read - Read Only" },
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{ 0xf0b00000, 0xf0b00fcf,
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"Old Analog Point Write - Read/Write" },
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{ 0xf0c00000, 0xf0c011ff,
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"Old A&D Point Configuration Information - Read/Write" },
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{ 0xf0d00000, 0xf0d01fff,
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"Old Digital Events and Reactions - Read/Write" },
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{ 0xf0d40000, 0xf0d4ffff,
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"Digital Events - Expanded - Read/Write" },
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{ 0xf0d80000, 0xf0dc81ff,
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"Scratch Pad - Read/Write" },
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{ 0xf0e00000, 0xf0e001ff,
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"Old Analog Point Calculation and Set - Read Only" },
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{ 0xf0f00000, 0xf0f002ff,
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"Old Digital Read and Clear - Read Only" },
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{ 0xf0f80000, 0xf0f801ff,
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"Old Analog Read and Clear/Restart - Read Only" },
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{ 0xf1000000, 0xf100021f,
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"Streaming - Read Only" },
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{ 0xf1001000, 0xf10017ff,
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"Analog EU or Digital Counter Packed Data - Read" },
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{ 0xf1001800, 0xf100183f,
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"Digital Packed Data - Read/Write" },
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{ 0xf1100000, 0xf1101fff,
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"Alarm Event Settings - Read/Write" },
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{ 0xf1200000, 0xf12111ff,
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"Event Message Configuration - Read/Write" },
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{ 0xf1300000, 0xf13000a3,
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"Email Configuration - Read/Write" },
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{ 0xf1540000, 0xf1540efc,
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"Serial Event Configuration - Read/Write" },
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{ 0xf1560000, 0xf1560f7f,
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"Wiegand Serial Event Configuration - Read/Write" },
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{ 0xf1808000, 0xf1809ffe,
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"SNAP High-Density Digital - Read Only" },
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{ 0xf180a000, 0xf180bffe,
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"SNAP High-Density Digital Read and Clear - Read/Write" },
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{ 0xf180c000, 0xf180c3fe,
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"SNAP High-Density Digital Write - Read/Write" },
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{ 0xf2000000, 0xf2002edf,
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"PID Configuration and Status - Read/Write" },
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{ 0xf2100000, 0xf21047ff,
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"PID Configuration and Status - Read/Write" },
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{ 0xf3000000, 0xf3000707,
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"Data Logging Configuration - Read/Write" },
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{ 0xf3020000, 0xf302176f,
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"Data Log - Read/Write" },
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{ 0xf4000000, 0xf4000f6f,
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"PID Module Configuration - Read/Write" },
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{ 0xf4080000, 0xf4080007,
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"Control Engine - Read/Write" },
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{ 0xf7002000, 0xf7002103,
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"Serial Brain Communication - Read/Write" },
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{ 0xf7002200, 0xf7002207,
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"microSD Card - Read/Write" },
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{ 0xf7003000, 0xf700308f,
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"WLAN Status - Read Only" },
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{ 0xf7004000, 0xf700553b,
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"WLAN Configuration - Read/Write" },
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{ 0xf8000000, 0xf800000b,
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"WLAN Enable - Read/Write" },
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{ 0xfffff008, 0xfffff077,
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"IP Settings - Read/Write" },
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{ 0, 0, NULL }
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};
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/* Function Prototypes */
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static guint get_optommp_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
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int offset, void *data _U_);
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static gint dissect_optommp_reassemble_tcp(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, void *data);
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static gint dissect_optommp_reassemble_udp(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, void *data);
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static gint dissect_optommp(tvbuff_t *tvb, packet_info *pinfo, proto_tree
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*tree, void * data _U_);
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static void dissect_optommp_dest_id(proto_tree *tree,
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tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_write_quadlet_request(proto_item **ti,
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proto_tree *tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_write_block_request(proto_item **ti,
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proto_tree *tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_write_response(proto_item **ti,
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proto_tree *tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_read_quadlet_request(proto_item **ti,
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proto_tree *tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_read_block_request(proto_item **ti,
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proto_tree *tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_read_quadlet_response(proto_item **ti,
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proto_tree *tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_read_block_response(proto_item **ti, proto_tree
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*tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_source_ID(proto_item **ti, proto_tree *tree,
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tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_destination_offset_6(proto_item **ti,
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proto_tree *tree, tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_quadlet_data(proto_item **ti, proto_tree *tree,
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tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_rcode(proto_item **ti, proto_tree *tree,
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tvbuff_t *tvb, guint *poffset);
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static guint16 dissect_optommp_data_length(proto_item **ti, proto_tree *tree,
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tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_data_block(proto_item **ti, proto_tree *tree,
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tvbuff_t *tvb, guint *poffset, guint16 data_length);
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static void dissect_optommp_data_block_byte(proto_item **ti, proto_tree *tree,
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tvbuff_t *tvb, guint *poffset);
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static void dissect_optommp_data_block_quadlet(proto_item **ti, proto_tree
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*tree, tvbuff_t *tvb, guint *poffset);
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static gint optommp_has_destination_offset(guint8 tcode);
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void proto_register_optommp(void);
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void proto_reg_handoff_optommp(void);
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/****************************************************************************
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function: get_optommp_message_len()
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parameters: pinfo: not used
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tvb: poiner to packet data
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offset: not used
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purpose: Gets the message length depending on tcode and data_block len
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****************************************************************************/
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static guint get_optommp_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
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int offset, void *data _U_)
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{
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guint len = OPTO_FRAME_HEADER_LEN;
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guint8 tcode = 0;
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/* Just want the most significant nibble */
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tcode = tvb_get_guint8(tvb, offset + 3) >> 4;
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if( tcode == OPTOMMP_WRITE_QUADLET_REQUEST ||
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tcode == OPTOMMP_WRITE_BLOCK_REQUEST ||
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tcode == OPTOMMP_READ_BLOCK_REQUEST ||
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tcode == OPTOMMP_READ_QUADLET_RESPONSE ||
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tcode == OPTOMMP_READ_BLOCK_RESPONSE )
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{
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len = 16;
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}
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else if( tcode == OPTOMMP_WRITE_RESPONSE ||
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tcode == OPTOMMP_READ_QUADLET_REQUEST )
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{
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len = 12;
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}
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if( (tcode == OPTOMMP_WRITE_BLOCK_REQUEST ||
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tcode == OPTOMMP_READ_BLOCK_RESPONSE) &&
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tvb_reported_length_remaining(tvb, offset) >= 14 )
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{
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/* offset + 12 is the data_length of the packet */
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len += (guint) tvb_get_ntohs(tvb, offset + 12);
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}
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return len;
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}
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/****************************************************************************
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function: dissect_optommp_reassemble_tcp()
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parameters: void
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purpose: reassemble packets then send to dissector
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****************************************************************************/
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static gint dissect_optommp_reassemble_tcp(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, void *data)
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{
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tcp_dissect_pdus(tvb, pinfo, tree, TRUE, OPTO_FRAME_HEADER_LEN,
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get_optommp_message_len, dissect_optommp, data);
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return tvb_captured_length(tvb);
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}
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/****************************************************************************
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function: dissect_optommp_reassemble_udp()
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parameters: void
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purpose: reassemble packets then send to dissector
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****************************************************************************/
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static gint dissect_optommp_reassemble_udp(tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *tree, void *data)
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{
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dissect_optommp(tvb, pinfo, tree, data);
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return tvb_captured_length(tvb);
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}
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/****************************************************************************
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function: dissect_optommp()
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parameters: void
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purpose: add the optommp protocol subtree
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****************************************************************************/
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static gint dissect_optommp(tvbuff_t *tvb, packet_info *pinfo, proto_tree
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*tree, void *data _U_)
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{
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/* Declare and init variables for each part of the packet */
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guint8 tcode = 0;
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/* Provide a summary label */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "OptoMMP");
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col_clear(pinfo->cinfo, COL_INFO);
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if( tvb_reported_length(tvb) >= OPTOMMP_MIN_LENGTH)
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{
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/* the tcode is the most sig nibble of the 3rd byte */
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tcode = tvb_get_guint8(tvb, 3) >> 4;
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if( optommp_has_destination_offset(tcode) != 0 &&
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tvb_reported_length(tvb) >= 12)
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{
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guint64 destination_offset = 0;
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destination_offset = tvb_get_ntoh48(tvb, 6);
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col_add_fstr(pinfo->cinfo, COL_INFO,
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" type: %s, dest_off: 0x%012" G_GINT64_MODIFIER "x",
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val_to_str(tcode, optommp_tcode_names, "Unknown (0x%02x)"),
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destination_offset);
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}
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else
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{
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col_add_fstr(pinfo->cinfo, COL_INFO, " type: %s",
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val_to_str(tcode, optommp_tcode_names, "Unknown (0x%02x)"));
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}
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}
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if( tree )
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{
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proto_item *root_ti = NULL;
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proto_item *ti = NULL;
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proto_tree *optommp_tree = NULL;
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guint offset = 0;
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/* Add the root node of our protocol */
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root_ti = proto_tree_add_item(tree, proto_optommp, tvb, 0, -1,
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ENC_NA);
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if( tvb_reported_length(tvb) >= OPTOMMP_MIN_LENGTH)
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{
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tcode = tvb_get_guint8(tvb, 3) >> 4;
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proto_item_append_text(root_ti, ", type: %s", val_to_str(tcode,
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optommp_tcode_names, "Unknown (0x%02x)"));
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if( optommp_has_destination_offset(tcode) != 0 )
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{
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guint64 destination_offset = 0;
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destination_offset = tvb_get_ntoh48(tvb, 6);
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proto_item_append_text(root_ti,
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", dest_off: 0x%012" G_GINT64_MODIFIER "x",
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destination_offset);
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}
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/* Add an expansion to the tree */
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optommp_tree = proto_item_add_subtree(root_ti, ett_optommp);
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/* The destination id is the first two bytes of the packet */
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dissect_optommp_dest_id(optommp_tree, tvb, &offset);
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/* Dissect transaction label */
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ti = proto_tree_add_item(optommp_tree, hf_optommp_tl, tvb, offset,
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1, ENC_BIG_ENDIAN);
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++offset;
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/* Dissect tcode */
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proto_tree_add_item(optommp_tree, hf_optommp_tcode, tvb,
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offset, 1, ENC_BIG_ENDIAN);
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tcode = tvb_get_guint8(tvb, offset) >> 4;
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++offset;
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/* Dissect the rest of the packet according to type */
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switch( tcode )
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{
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case 0:
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dissect_optommp_write_quadlet_request(&ti, optommp_tree, tvb,
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&offset);
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break;
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case 1:
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dissect_optommp_write_block_request(&ti, optommp_tree, tvb,
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&offset);
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break;
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case 2:
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dissect_optommp_write_response(&ti, optommp_tree, tvb,
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&offset);
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break;
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case 4:
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dissect_optommp_read_quadlet_request(&ti, optommp_tree, tvb,
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&offset);
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break;
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case 5:
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dissect_optommp_read_block_request(&ti, optommp_tree, tvb,
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&offset);
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break;
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case 6:
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dissect_optommp_read_quadlet_response(&ti, optommp_tree, tvb,
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&offset);
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break;
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case 7:
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dissect_optommp_read_block_response(&ti, optommp_tree, tvb,
|
|
&offset);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_dest_id()
|
|
parameters: tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect destination id and boot id
|
|
****************************************************************************/
|
|
static void dissect_optommp_dest_id(proto_tree *tree,
|
|
tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
proto_tree *dest_id_tree = NULL;
|
|
guint16 dest_id = 0;
|
|
|
|
/* Check whether boot id present */
|
|
dest_id = tvb_get_ntohs(tvb, *poffset);
|
|
if( (dest_id & 0x8000) == 0x8000 )
|
|
{
|
|
dest_id_tree = proto_tree_add_subtree(tree, tvb, *poffset,
|
|
2, ett_dest_id, NULL, "destination_ID");
|
|
proto_tree_add_item(dest_id_tree, hf_optommp_dest_id,
|
|
tvb, *poffset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(dest_id_tree, hf_optommp_boot_id,
|
|
tvb, *poffset, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
else
|
|
{
|
|
proto_tree_add_item(tree, hf_optommp_nodest_id,
|
|
tvb, *poffset, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
*poffset += 2;
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_write_quadlet_request()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a write quadlet request
|
|
****************************************************************************/
|
|
static void dissect_optommp_write_quadlet_request(proto_item **ti,
|
|
proto_tree *tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
dissect_optommp_source_ID(ti, tree, tvb, poffset);
|
|
dissect_optommp_destination_offset_6(ti, tree, tvb, poffset);
|
|
dissect_optommp_quadlet_data(ti, tree, tvb, poffset);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_write_block_request()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a write block request
|
|
****************************************************************************/
|
|
static void dissect_optommp_write_block_request(proto_item **ti,
|
|
proto_tree *tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
guint16 data_length = 0;
|
|
dissect_optommp_source_ID(ti, tree, tvb, poffset);
|
|
dissect_optommp_destination_offset_6(ti, tree, tvb, poffset);
|
|
data_length = dissect_optommp_data_length(ti, tree, tvb, poffset);
|
|
*poffset += 2; /* skip extended_tcode */
|
|
dissect_optommp_data_block(ti, tree, tvb, poffset, data_length);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_write_response()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a write response
|
|
****************************************************************************/
|
|
static void dissect_optommp_write_response(proto_item **ti,
|
|
proto_tree *tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
dissect_optommp_source_ID(ti, tree, tvb, poffset);
|
|
dissect_optommp_rcode(ti, tree, tvb, poffset);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_read_quadlet_request()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a read quadlet request
|
|
****************************************************************************/
|
|
static void dissect_optommp_read_quadlet_request(proto_item **ti,
|
|
proto_tree *tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
dissect_optommp_source_ID(ti, tree, tvb, poffset);
|
|
dissect_optommp_destination_offset_6(ti, tree, tvb, poffset);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_read_block_request()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a read block request
|
|
****************************************************************************/
|
|
static void dissect_optommp_read_block_request(proto_item **ti,
|
|
proto_tree *tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
dissect_optommp_source_ID(ti, tree, tvb, poffset);
|
|
dissect_optommp_destination_offset_6(ti, tree, tvb, poffset);
|
|
dissect_optommp_data_length(ti, tree, tvb, poffset);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_read_quadlet_response
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a read quadlet response
|
|
****************************************************************************/
|
|
static void dissect_optommp_read_quadlet_response(proto_item **ti,
|
|
proto_tree *tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
dissect_optommp_source_ID(ti, tree, tvb, poffset);
|
|
dissect_optommp_rcode(ti, tree, tvb, poffset);
|
|
*poffset += 5; /* Skip reserved part for now */
|
|
dissect_optommp_quadlet_data(ti, tree, tvb, poffset);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_read_block_response()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a read block response
|
|
****************************************************************************/
|
|
static void dissect_optommp_read_block_response(proto_item **ti, proto_tree
|
|
*tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
guint16 data_length = 0;
|
|
dissect_optommp_source_ID(ti, tree, tvb, poffset);
|
|
dissect_optommp_rcode(ti, tree, tvb, poffset);
|
|
*poffset += 5; /* Skip the reserved part for now */
|
|
data_length = dissect_optommp_data_length(ti, tree, tvb, poffset);
|
|
*poffset += 2; /* skip extended_tcode */
|
|
dissect_optommp_data_block(ti, tree, tvb, poffset, data_length);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_source_ID()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect the source id field.
|
|
****************************************************************************/
|
|
static void dissect_optommp_source_ID(proto_item **ti, proto_tree *tree,
|
|
tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
if( tvb_reported_length(tvb) >= *poffset + 2 )
|
|
{
|
|
*ti = proto_tree_add_item(tree, hf_optommp_source_ID, tvb, *poffset,
|
|
2, ENC_BIG_ENDIAN);
|
|
}
|
|
*poffset += 2;
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_destination_offset_6()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Get the destination offset byte by byte and then reassemble
|
|
note: This must be called when the reported length < offset + 8
|
|
****************************************************************************/
|
|
static void dissect_optommp_destination_offset_6(proto_item **ti,
|
|
proto_tree *tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
if( tvb_reported_length(tvb) >= *poffset + 6 )
|
|
{
|
|
*poffset += 2; /* The first two bytes are always 0xFFFF */
|
|
*ti = proto_tree_add_item(tree, hf_optommp_dest_offset, tvb,
|
|
*poffset, 4, ENC_BIG_ENDIAN);
|
|
}
|
|
*poffset += 4;
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_quadlet_data()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect the quadlet data part for packets that have it
|
|
****************************************************************************/
|
|
static void dissect_optommp_quadlet_data(proto_item **ti, proto_tree *tree,
|
|
tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
if( tvb_reported_length(tvb) >= *poffset + 4 )
|
|
{
|
|
*ti = proto_tree_add_item(tree, hf_optommp_quadlet_data, tvb,
|
|
*poffset, 4, ENC_BIG_ENDIAN);
|
|
}
|
|
*poffset += 4;
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_data_length()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect data length
|
|
****************************************************************************/
|
|
static guint16 dissect_optommp_data_length(proto_item **ti, proto_tree *tree,
|
|
tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
guint16 data_length = 0;
|
|
|
|
if( tvb_reported_length(tvb) >= *poffset + 2 )
|
|
{
|
|
data_length = tvb_get_ntohs(tvb, *poffset);
|
|
*ti = proto_tree_add_item(tree, hf_optommp_data_length, tvb,
|
|
*poffset, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
*poffset += 2;
|
|
|
|
return data_length;
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_rcode()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect rcode part for packets that have it
|
|
****************************************************************************/
|
|
static void dissect_optommp_rcode(proto_item **ti, proto_tree *tree,
|
|
tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
if( tvb_reported_length(tvb) >= *poffset + 1 )
|
|
{
|
|
*ti = proto_tree_add_item(tree, hf_optommp_rcode, tvb, *poffset,
|
|
1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
++(*poffset);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_data_block()
|
|
parameters: ti: The node to add the subtree to
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
data_length:number of bytes in the data_block
|
|
purpose: Dissect a data block.
|
|
****************************************************************************/
|
|
static void dissect_optommp_data_block(proto_item **ti, proto_tree *tree,
|
|
tvbuff_t *tvb, guint *poffset, guint16 data_length)
|
|
{
|
|
proto_tree *data_block_tree_b = NULL;
|
|
proto_tree *data_block_tree_q = NULL;
|
|
guint i = 0;
|
|
guint quadlet_offset = 0;
|
|
guint byte_offset = 0;
|
|
quadlet_offset = *poffset;
|
|
byte_offset = *poffset;
|
|
|
|
/* Create and fill quadlet subtree */
|
|
data_block_tree_q = proto_tree_add_subtree(tree, tvb, *poffset,
|
|
data_length, ett_data_block_q, ti, "data_block (as quadlets)");
|
|
|
|
for( i = 0; i < (guint16) (data_length / 4); ++i )
|
|
{
|
|
dissect_optommp_data_block_quadlet(ti, data_block_tree_q, tvb,
|
|
&quadlet_offset);
|
|
}
|
|
|
|
/* Create and fill byte subtree */
|
|
data_block_tree_b = proto_tree_add_subtree(tree, tvb, *poffset,
|
|
data_length, ett_data_block_b, ti, "data_block (as bytes)");
|
|
|
|
for( i = 0; i < data_length; ++i )
|
|
{
|
|
dissect_optommp_data_block_byte(ti, data_block_tree_b, tvb,
|
|
&byte_offset);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_data_block_byte()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a data block.
|
|
****************************************************************************/
|
|
static void dissect_optommp_data_block_byte(proto_item **ti, proto_tree *tree,
|
|
tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
if( tvb_reported_length(tvb) >= *poffset + 1 )
|
|
{
|
|
*ti = proto_tree_add_item(tree, hf_optommp_data_block_byte, tvb,
|
|
*poffset, 1, ENC_NA);
|
|
}
|
|
|
|
++(*poffset);
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_data_block_quadlet()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
purpose: Dissect a data block.
|
|
****************************************************************************/
|
|
static void dissect_optommp_data_block_quadlet(proto_item **ti, proto_tree
|
|
*tree, tvbuff_t *tvb, guint *poffset)
|
|
{
|
|
if( tvb_reported_length(tvb) >= *poffset + 4 )
|
|
{
|
|
*ti = proto_tree_add_item(tree, hf_optommp_data_block_quadlet,
|
|
tvb, *poffset, 4, ENC_NA);
|
|
}
|
|
|
|
*poffset += 4;
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: dissect_optommp_data_block_quadlet()
|
|
parameters: ti: Reserved for future use
|
|
tree: The subtree to append nodes to
|
|
tvb: The data of the current node
|
|
poffset: Keeps track of our location in the tree
|
|
returns: 1 if packet type has destination_offset field, 0 otherwise
|
|
purpose: Dissect a data block.
|
|
****************************************************************************/
|
|
static gint optommp_has_destination_offset(guint8 tcode)
|
|
{
|
|
if( tcode == 0 || tcode == 1 || tcode == 4 || tcode == 5 )
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: proto_register_optommp()
|
|
parameters: void
|
|
purpose: create and register the protocol, trees, and fields
|
|
****************************************************************************/
|
|
void proto_register_optommp(void)
|
|
{
|
|
/* The fields */
|
|
static hf_register_info hf[] =
|
|
{
|
|
/* When MSB not set, dest_ID is 0 */
|
|
{ &hf_optommp_nodest_id,
|
|
{ "destination_ID", "optommp.destination_ID",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x8000,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_dest_id,
|
|
{ "destination_ID", "optommp.destination_ID",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_boot_id,
|
|
{ "boot_ID", "optommp.boot_ID",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x7FFF,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_tl,
|
|
{ "tl", "optommp.tl",
|
|
FT_UINT8, BASE_HEX,
|
|
NULL, 0xFC,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_tcode,
|
|
{ "tcode", "optommp.tcode",
|
|
FT_UINT8, BASE_HEX,
|
|
VALS(optommp_tcode_names), 0xF0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_source_ID,
|
|
{ "source_ID", "optommp.source_id",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_rcode,
|
|
{ "rcode", "optommp.rcode",
|
|
FT_UINT8, BASE_HEX,
|
|
VALS(optommp_rcode_meanings), 0xF0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_quadlet_data,
|
|
{ "quadlet_data", "optommp.quadlet_data",
|
|
FT_UINT32, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_data_length,
|
|
{ "data_length", "optommp.data_length",
|
|
FT_UINT16, BASE_HEX,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_dest_offset,
|
|
{ "destination_offset", "optommp.destination_offset",
|
|
FT_UINT32, BASE_HEX | BASE_RANGE_STRING,
|
|
RVALS(optommp_mm_areas), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_data_block_byte,
|
|
{ "data_block_byte", "optommp.data_block_byte",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_optommp_data_block_quadlet,
|
|
{ "data_block_quadlet", "optommp.data_block_quadlet",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL, 0x0,
|
|
NULL, HFILL }
|
|
}
|
|
};
|
|
|
|
/* The subtrees */
|
|
static gint *ett[] =
|
|
{
|
|
&ett_optommp,
|
|
&ett_dest_id,
|
|
&ett_data_block_q,
|
|
&ett_data_block_b
|
|
};
|
|
/* The protocol */
|
|
proto_optommp = proto_register_protocol("OptoMMP", "OptoMMP", "optommp");
|
|
proto_register_field_array(proto_optommp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
/****************************************************************************
|
|
function: proto_reg_handoff()
|
|
parameters: void
|
|
purpose: plug into wireshark with a handle
|
|
****************************************************************************/
|
|
void proto_reg_handoff_optommp(void)
|
|
{
|
|
optommp_tcp_handle = create_dissector_handle(dissect_optommp_reassemble_tcp, proto_optommp);
|
|
optommp_udp_handle = create_dissector_handle(dissect_optommp_reassemble_udp, proto_optommp);
|
|
|
|
dissector_add_for_decode_as_with_preference("tcp.port", optommp_tcp_handle);
|
|
dissector_add_for_decode_as_with_preference("udp.port", optommp_udp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|