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|
/* packet-arinc615a.c
* Routines for a615a packet disassembly
*
* Copyright 2020 Roman Koshelev
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/ptvcursor.h>
#include "packet-tftp.h"
void proto_register_a615a(void);
void proto_reg_handoff_a615a(void);
enum A615A_SUFFIX { LCI, LCL, LCS, LNA, LND, LNL, LNO, LNR, LNS, LUI, LUR, LUS };
typedef struct _string_pair {
const char *abbreviated;
const char *full;
} string_pair;
static string_pair a615a_file[] = {{"LCI", "Load Configuration Initialization"},
{"LCL", "Load Configuration List"},
{"LCS", "Load Configuration Status"},
{"LNA", "Load Downloading Answer"},
{"LND", "Load Downloading Media"},
{"LNL", "Load Downloading List"},
{"LNO", "Load Downloading Operator"},
{"LNR", "Load Downloading Request"},
{"LNS", "Load Downloading Status"},
{"LUI", "Load Upload Initialization"},
{"LUR", "Load Uploading Request"},
{"LUS", "Load Uploading Status"}};
static const value_string a615a_operation_status_codes[] = {
{0x0001, "Accepted, not yet started"},
{0x0002, "Operation in progress"},
{0x0003, "Operation completed without error"},
{0x0004, "Operation in progress, details in status description"},
{0x1000, "Operation denied, reason in status description"},
{0x1002, "Operation not supported by the target"},
{0x1003, "Operation aborted by target hardware, info in status description"},
{0x1004, "Operation aborted by target on Dataloader error message"},
{0x1005, "Operation aborted by target on operator action"},
{0x1007, "Load of this header file has failed, details in status description"},
{0, NULL}};
static int proto_a615a;
static int ett_a615a;
static int hf_a615a_file_length;
static int hf_a615a_protocol_version;
static int hf_a615a_counter;
static int hf_a615a_operation_status;
static int hf_a615a_exception_timer;
static int hf_a615a_estimated_time;
static int hf_a615a_status_description;
static int hf_a615a_load_ratio;
static int hf_a615a_file_count;
static int hf_a615a_file_name;
static int hf_a615a_file_description;
static int hf_a615a_part_number;
static int hf_a615a_number_target_hardware;
static int hf_a615a_literal_name;
static int hf_a615a_serial_number;
static int hf_a615a_part_number_count;
static int hf_a615a_amendment;
static int hf_a615a_designation;
static int hf_a615a_user_data;
static int hf_a615a_file_type;
#define FIND_PORT 1001
static int proto_find;
static int ett_find;
static int hf_find_opcode;
static int hf_find_target_hardware_identifier;
static int hf_find_target_type_name;
static int hf_find_target_position;
static int hf_find_literal_name;
static int hf_find_manufacturer_code;
static int hf_find_packet_terminator;
static dissector_handle_t find_handle;
#define FIND_IRQ 1
#define FIND_IAN 2
static const value_string find_opcode_vals[] = {
{ FIND_IRQ, "Information ReQuest (IRQ)" },
{ FIND_IAN, "Information ANswer (IAN)" },
{ 0, NULL }
};
static void dissect_a615a_LCL(ptvcursor_t *ptvc, packet_info *pinfo _U_)
{
uint32_t th_count, pn_count;
proto_item *pi;
ptvcursor_add(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA);
ptvcursor_add_ret_uint(ptvc, hf_a615a_number_target_hardware, 2, ENC_BIG_ENDIAN, &th_count);
for (unsigned i = 0; i < th_count; ++i) {
pi = ptvcursor_add(ptvc, hf_a615a_literal_name, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_push_subtree(ptvc, pi, ett_a615a);
ptvcursor_add(ptvc, hf_a615a_serial_number, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_add_ret_uint(ptvc, hf_a615a_part_number_count, 2, ENC_BIG_ENDIAN, &pn_count);
for (unsigned j = 0; j < pn_count; ++j) {
pi = ptvcursor_add(ptvc, hf_a615a_part_number, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_push_subtree(ptvc, pi, ett_a615a);
ptvcursor_add(ptvc, hf_a615a_amendment, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_designation, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_pop_subtree(ptvc);
}
ptvcursor_pop_subtree(ptvc);
}
}
static void dissect_a615a_LUS(ptvcursor_t *ptvc, packet_info *pinfo)
{
uint32_t status, file_count;
const uint8_t *ratio;
const uint8_t *protocol_version = NULL;
proto_item *pi;
ptvcursor_add_ret_string(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA,
pinfo->pool, &protocol_version);
ptvcursor_add_ret_uint(ptvc, hf_a615a_operation_status, 2, ENC_BIG_ENDIAN, &status);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Status: %s",
val_to_str(status, a615a_operation_status_codes, "Unknown (0x%04x)"));
ptvcursor_add(ptvc, hf_a615a_status_description, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_counter, 2, ENC_BIG_ENDIAN);
if(protocol_version && strcmp((const char*)protocol_version, "A1"))
{
ptvcursor_add(ptvc, hf_a615a_exception_timer, 2, ENC_BIG_ENDIAN);
}
ptvcursor_add(ptvc, hf_a615a_estimated_time, 2, ENC_BIG_ENDIAN);
ptvcursor_add_ret_string(ptvc, hf_a615a_load_ratio, 3, ENC_ASCII | ENC_NA, pinfo->pool,
&ratio);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Load Ratio: %s %%", ratio);
pi = ptvcursor_add_ret_uint(ptvc, hf_a615a_file_count, 2, ENC_BIG_ENDIAN, &file_count);
ptvcursor_push_subtree(ptvc, pi, ett_a615a);
for (unsigned i = 0; i < file_count; ++i) {
pi = ptvcursor_add(ptvc, hf_a615a_file_name, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_push_subtree(ptvc, pi, ett_a615a);
ptvcursor_add(ptvc, hf_a615a_part_number, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_load_ratio, 3, ENC_ASCII | ENC_NA);
ptvcursor_add(ptvc, hf_a615a_operation_status, 2, ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_status_description, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_pop_subtree(ptvc);
}
ptvcursor_pop_subtree(ptvc);
}
static void dissect_a615a_LCS(ptvcursor_t *ptvc, packet_info *pinfo)
{
uint32_t status;
ptvcursor_add(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA);
ptvcursor_add(ptvc, hf_a615a_counter, 2, ENC_BIG_ENDIAN);
ptvcursor_add_ret_uint(ptvc, hf_a615a_operation_status, 2, ENC_BIG_ENDIAN, &status);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Status: %s",
val_to_str(status, a615a_operation_status_codes, "Unknown (0x%04x)"));
ptvcursor_add(ptvc, hf_a615a_exception_timer, 2, ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_estimated_time, 2, ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_status_description, 1, ENC_ASCII | ENC_BIG_ENDIAN);
}
static void dissect_a615a_LUI_LCI_LND_LNO(ptvcursor_t *ptvc, packet_info *pinfo)
{
uint32_t status;
ptvcursor_add(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA);
ptvcursor_add_ret_uint(ptvc, hf_a615a_operation_status, 2, ENC_BIG_ENDIAN, &status);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Status: %s",
val_to_str(status, a615a_operation_status_codes, "Unknown (0x%04x)"));
ptvcursor_add(ptvc, hf_a615a_status_description, 1, ENC_ASCII | ENC_BIG_ENDIAN);
}
static void dissect_a615a_LUR(ptvcursor_t *ptvc, packet_info *pinfo _U_)
{
uint32_t file_count;
proto_item *pi;
ptvcursor_add(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA);
ptvcursor_add_ret_uint(ptvc, hf_a615a_file_count, 2, ENC_BIG_ENDIAN, &file_count);
for (unsigned i = 0; i < file_count; ++i) {
pi = ptvcursor_add(ptvc, hf_a615a_file_name, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_push_subtree(ptvc, pi, ett_a615a);
ptvcursor_add(ptvc, hf_a615a_part_number, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_pop_subtree(ptvc);
}
}
static void dissect_a615a_LNL(ptvcursor_t *ptvc, packet_info *pinfo _U_)
{
uint32_t file_count;
proto_item *pi;
ptvcursor_add(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA);
ptvcursor_add_ret_uint(ptvc, hf_a615a_file_count, 2, ENC_BIG_ENDIAN, &file_count);
for (unsigned i = 0; i < file_count; ++i) {
pi = ptvcursor_add(ptvc, hf_a615a_file_name, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_push_subtree(ptvc, pi, ett_a615a);
ptvcursor_add(ptvc, hf_a615a_file_description, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_pop_subtree(ptvc);
}
}
static void dissect_a615a_LNR(ptvcursor_t *ptvc, packet_info *pinfo _U_)
{
uint32_t file_count;
ptvcursor_add(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA);
ptvcursor_add_ret_uint(ptvc, hf_a615a_file_count, 2, ENC_BIG_ENDIAN, &file_count);
for (unsigned i = 0; i < file_count; ++i) {
ptvcursor_add(ptvc, hf_a615a_file_name, 1, ENC_ASCII | ENC_BIG_ENDIAN);
}
ptvcursor_add(ptvc, hf_a615a_user_data, 1, ENC_NA);
}
static void dissect_a615a_LNS(ptvcursor_t *ptvc, packet_info *pinfo)
{
uint32_t status, file_count;
proto_item *pi;
const uint8_t *protocol_version = NULL;
ptvcursor_add_ret_string(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA,
pinfo->pool, &protocol_version);
ptvcursor_add_ret_uint(ptvc, hf_a615a_operation_status, 2, ENC_BIG_ENDIAN, &status);
col_append_fstr(pinfo->cinfo, COL_INFO, ", Status: %s",
val_to_str(status, a615a_operation_status_codes, "Unknown (0x%04x)"));
ptvcursor_add(ptvc, hf_a615a_status_description, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_counter, 2, ENC_BIG_ENDIAN);
if (protocol_version && strcmp((const char*)protocol_version, "A1"))
{
ptvcursor_add(ptvc, hf_a615a_exception_timer, 2, ENC_BIG_ENDIAN);
}
ptvcursor_add(ptvc, hf_a615a_estimated_time, 2, ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_load_ratio, 3, ENC_ASCII | ENC_NA);
ptvcursor_add_ret_uint(ptvc, hf_a615a_file_count, 2, ENC_BIG_ENDIAN, &file_count);
for (unsigned i = 0; i < file_count; ++i) {
pi = ptvcursor_add(ptvc, hf_a615a_file_name, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_push_subtree(ptvc, pi, ett_a615a);
ptvcursor_add(ptvc, hf_a615a_operation_status, 2, ENC_BIG_ENDIAN);
ptvcursor_add(ptvc, hf_a615a_file_description, 1, ENC_ASCII | ENC_BIG_ENDIAN);
ptvcursor_pop_subtree(ptvc);
}
}
static void dissect_a615a_LNA(ptvcursor_t *ptvc, packet_info *pinfo _U_)
{
uint32_t file_count;
ptvcursor_add(ptvc, hf_a615a_protocol_version, 2, ENC_ASCII | ENC_NA);
ptvcursor_add_ret_uint(ptvc, hf_a615a_file_count, 2, ENC_BIG_ENDIAN, &file_count);
for (unsigned i = 0; i < file_count; ++i) {
ptvcursor_add(ptvc, hf_a615a_file_name, 1, ENC_ASCII | ENC_BIG_ENDIAN);
}
}
static void dissect_a615a_protocol_file(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
int suffix)
{
proto_item *ti;
ti = proto_tree_add_item(tree, proto_a615a, tvb, 0, -1, ENC_NA);
proto_tree *a615a_tree = proto_item_add_subtree(ti, ett_a615a);
ti = proto_tree_add_string(a615a_tree, hf_a615a_file_type, tvb, 0, 0, a615a_file[suffix].full);
proto_item_set_generated(ti);
ptvcursor_t *ptvc = ptvcursor_new(pinfo->pool, a615a_tree, tvb, 0);
ptvcursor_add(ptvc, hf_a615a_file_length, 4, ENC_BIG_ENDIAN);
switch (suffix) {
case LUI:
case LCI:
case LND:
case LNO: {
dissect_a615a_LUI_LCI_LND_LNO(ptvc, pinfo);
break;
}
case LCL: {
dissect_a615a_LCL(ptvc, pinfo);
break;
}
case LCS: {
dissect_a615a_LCS(ptvc, pinfo);
break;
}
case LNA: {
dissect_a615a_LNA(ptvc, pinfo);
break;
}
case LNL: {
dissect_a615a_LNL(ptvc, pinfo);
break;
}
case LNR: {
dissect_a615a_LNR(ptvc, pinfo);
break;
}
case LNS: {
dissect_a615a_LNS(ptvc, pinfo);
break;
}
case LUR: {
dissect_a615a_LUR(ptvc, pinfo);
break;
}
case LUS: {
dissect_a615a_LUS(ptvc, pinfo);
break;
}
default: {
DISSECTOR_ASSERT_NOT_REACHED();
break;
}
}
ptvcursor_free(ptvc);
}
static bool dissect_a615a_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
unsigned psize = tvb_captured_length(tvb);
if (psize < 6) return false;
if ((tvb_get_ntohl(tvb, 0) != psize) || ((char)tvb_get_uint8(tvb, 4) != 'A')) return false;
const char *filename = ((struct tftpinfo *)data)->filename;
if (filename == NULL) {
return false;
}
for (unsigned i = 0; i < array_length(a615a_file); ++i) {
if (g_str_has_suffix(filename, a615a_file[i].abbreviated)) {
col_set_str(pinfo->cinfo, COL_PROTOCOL, "A615a");
col_add_str(pinfo->cinfo, COL_INFO, filename);
dissect_a615a_protocol_file(tvb, pinfo, tree, i);
return true;
}
}
return false;
}
static int dissect_find(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FIND");
proto_item *ti = proto_tree_add_item(tree, proto_find, tvb, 0, -1, ENC_NA);
proto_tree *find_tree = proto_item_add_subtree(ti, ett_find);
ptvcursor_t *ptvc = ptvcursor_new(pinfo->pool, find_tree, tvb, 0);
uint32_t opcode;
ptvcursor_add_ret_uint(ptvc, hf_find_opcode, 2, ENC_BIG_ENDIAN, &opcode);
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", val_to_str(opcode, find_opcode_vals, "Unknown (0x%04x)"));
if (opcode == FIND_IAN) {
ptvcursor_add(ptvc, hf_find_target_hardware_identifier, -1, ENC_ASCII | ENC_NA);
ptvcursor_add(ptvc, hf_find_target_type_name, -1, ENC_ASCII | ENC_NA);
ptvcursor_add(ptvc, hf_find_target_position, -1, ENC_ASCII | ENC_NA);
ptvcursor_add(ptvc, hf_find_literal_name, -1, ENC_ASCII | ENC_NA);
ptvcursor_add(ptvc, hf_find_manufacturer_code, -1, ENC_ASCII | ENC_NA);
} else {
ptvcursor_advance(ptvc, 1);
}
ptvcursor_add(ptvc, hf_find_packet_terminator, 1, ENC_NA);
ptvcursor_free(ptvc);
return tvb_captured_length(tvb);
}
void proto_register_a615a(void)
{
static hf_register_info hf[] = {
{&hf_a615a_file_length,
{"File Length", "a615a.file_length", FT_UINT32, BASE_DEC, NULL, 0x0,
"A615a Protocol File Length", HFILL}},
{&hf_a615a_protocol_version,
{"Protocol Version", "a615a.protocol_version", FT_STRING, BASE_NONE, NULL, 0x0,
"A615a Protocol File Version", HFILL}},
{&hf_a615a_counter,
{"Counter", "a615a.counter", FT_UINT16, BASE_DEC, NULL, 0x0, "A615a Protocol Counter",
HFILL}},
{&hf_a615a_operation_status,
{"Status Code", "a615a.status_code", FT_UINT16, BASE_DEC,
VALS(a615a_operation_status_codes), 0x0, NULL, HFILL}},
{&hf_a615a_exception_timer,
{"Exception Timer", "a615a.exception_timer", FT_UINT16, BASE_DEC, NULL, 0x0,
"A615a Exception Timer", HFILL}},
{&hf_a615a_estimated_time,
{"Estimated Time", "a615a.estimated_time", FT_UINT16, BASE_DEC, NULL, 0x0,
"A615a Estimated Time", HFILL}},
{&hf_a615a_status_description,
{"Status Description", "a615a.status", FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"A615a Status Description", HFILL}},
{&hf_a615a_load_ratio,
{"Load Ratio", "a615a.load_ratio", FT_STRING, BASE_NONE, NULL, 0x0,
"A615a Load Operation Ratio", HFILL}},
{&hf_a615a_file_count,
{"File Count", "a615a.file_count", FT_UINT16, BASE_DEC, NULL, 0x0, "A615a File Count",
HFILL}},
{&hf_a615a_file_name,
{"File Name", "a615a.file_name", FT_UINT_STRING, BASE_NONE, NULL, 0x0, "A615a File Name",
HFILL}},
{&hf_a615a_file_description,
{"File Description", "a615a.file_description", FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"A615a File Description", HFILL}},
{&hf_a615a_part_number,
{"Part Number", "a615a.part_number", FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"A615a Part Number", HFILL}},
{&hf_a615a_number_target_hardware,
{"Number of Target Hardware", "a615a.num_hardware", FT_UINT16, BASE_DEC, NULL, 0x0,
"A615a Number of Target Hardware", HFILL}},
{&hf_a615a_literal_name,
{"Literal Name", "a615a.literal_name", FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"A615a Literal Name", HFILL}},
{&hf_a615a_serial_number,
{"Serial Number", "a615a.serial_number", FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"A615a Serial Number", HFILL}},
{&hf_a615a_part_number_count,
{"Part Number Count", "a615a.num_parts", FT_UINT16, BASE_DEC, NULL, 0x0,
"A615a Part Number Count", HFILL}},
{&hf_a615a_amendment,
{"Amendment", "a615a.amendment", FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"A615a Amendment", HFILL}},
{&hf_a615a_designation,
{"Designation", "a615a.designation", FT_UINT_STRING, BASE_NONE, NULL, 0x0,
"A615a Designation", HFILL}},
{&hf_a615a_user_data,
{"User Data", "a615a.user_data", FT_UINT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL}},
{&hf_a615a_file_type,
{"Type", "a615a.type", FT_STRINGZ, BASE_NONE, NULL, 0x0, "A615a File type", HFILL}},
};
static int *ett[] = {&ett_a615a};
proto_a615a = proto_register_protocol("Arinc 615a Protocol", "A615a", "a615a");
proto_register_field_array(proto_a615a, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
static hf_register_info hf_find[] = {
{&hf_find_opcode,
{"Opcode", "find.opcode", FT_UINT16, BASE_DEC, VALS(find_opcode_vals), 0x0,
"FIND Opcode", HFILL}},
{&hf_find_target_hardware_identifier,
{"Target Hardware Identifier", "find.target_hardware_identifier", FT_STRINGZ,
BASE_NONE, NULL, 0x0, "FIND Target Hardware Identifier", HFILL}},
{&hf_find_target_type_name,
{"Target Type Name", "find.target_type_name", FT_STRINGZ, BASE_NONE, NULL, 0x0,
"FIND Target Type Name", HFILL}},
{&hf_find_target_position,
{"Target Position", "find.target_position", FT_STRINGZ, BASE_NONE, NULL, 0x0,
"FIND Target Position", HFILL}},
{&hf_find_literal_name,
{"Literal Name", "find.literal_name", FT_STRINGZ, BASE_NONE, NULL, 0x0,
"FIND Literal Name", HFILL}},
{&hf_find_manufacturer_code,
{"Manufacturer Code", "find.manufacturer_code", FT_STRINGZ, BASE_NONE, NULL, 0x0,
"FIND Manufacturer Code", HFILL}},
{&hf_find_packet_terminator,
{"Packet terminator", "find.packet_terminator", FT_UINT8, BASE_HEX, NULL, 0x0,
"FIND Packet terminator", HFILL}}
};
static int *etts_find[] = {&ett_find};
proto_find = proto_register_protocol("Find Identification of Network Devices", "FIND", "find");
proto_register_field_array(proto_find, hf_find, array_length(hf_find));
proto_register_subtree_array(etts_find, array_length(etts_find));
find_handle = register_dissector("find", dissect_find, proto_find);
}
void proto_reg_handoff_a615a(void)
{
heur_dissector_add("tftp", dissect_a615a_heur, "Arinc 615a Protocol over TFTP", "a615a", proto_a615a,
HEURISTIC_ENABLE);
dissector_add_uint_with_preference("udp.port", FIND_PORT, find_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:
*/
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