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wireshark/epan/dissectors/packet-nordic_ble.c

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/* packet-nordic_ble.c
* Routines for Nordic BLE sniffer dissection
* Copyright 2016, Nordic Semiconductor
*
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include "packet-btle.h"
/* Size of various UART Packet header fields */
#define BEEF_LENGTH_BYTES (2)
#define HEADER_LEN_LENGTH_BYTES (1)
#define PACKET_LEN_LENGTH_BYTES (1)
#define PROTOVER_LENGTH_BYTES (1)
#define COUNTER_LENGTH_BYTES (2)
#define ID_LENGTH_BYTES (1)
#define BLE_HEADER_LEN_LENGTH_BYTES (1)
#define FLAGS_LENGTH_BYTES (1)
#define CHANNEL_LENGTH_BYTES (1)
#define RSSI_LENGTH_BYTES (1)
#define EVENT_COUNTER_LENGTH_BYTES (2)
#define TIMESTAMP_LENGTH_BYTES (4)
#define BOARD_ID_INDEX (0)
#define BOARD_ID_LENGTH (1)
/* Define the index of the various fields in the UART_PACKET header */
#define UART_PACKET_HEADER_LEN_INDEX (0)
#define UART_PACKET_PACKET_LEN_INDEX (UART_PACKET_HEADER_LEN_INDEX + HEADER_LEN_LENGTH_BYTES)
#define UART_PACKET_PROTOVER_INDEX (UART_PACKET_PACKET_LEN_INDEX + PACKET_LEN_LENGTH_BYTES)
#define UART_PACKET_COUNTER_INDEX (UART_PACKET_PROTOVER_INDEX + PROTOVER_LENGTH_BYTES)
#define UART_PACKET_ID_INDEX (UART_PACKET_COUNTER_INDEX + COUNTER_LENGTH_BYTES)
#define UART_PACKET_BLE_HEADER_LEN_INDEX (UART_PACKET_ID_INDEX + ID_LENGTH_BYTES)
#define UART_PACKET_FLAGS_INDEX (UART_PACKET_BLE_HEADER_LEN_INDEX + BLE_HEADER_LEN_LENGTH_BYTES)
#define UART_PACKET_CHANNEL_INDEX (UART_PACKET_FLAGS_INDEX + FLAGS_LENGTH_BYTES)
#define UART_PACKET_RSSI_INDEX (UART_PACKET_CHANNEL_INDEX + CHANNEL_LENGTH_BYTES)
#define UART_PACKET_EVENT_COUNTER_INDEX (UART_PACKET_RSSI_INDEX + RSSI_LENGTH_BYTES)
#define UART_PACKET_TIMESTAMP_INDEX (UART_PACKET_EVENT_COUNTER_INDEX + EVENT_COUNTER_LENGTH_BYTES)
#define UART_PACKET_ACCESS_ADDRESS_INDEX (UART_PACKET_TIMESTAMP_INDEX + TIMESTAMP_LENGTH_BYTES)
#define INDEX_OF_LENGTH_FIELD_IN_BLE_PACKET (5)
#define INDEX_OF_LENGTH_FIELD_IN_EVENT_PACKET (UART_PACKET_TIMESTAMP_INDEX + TIMESTAMP_LENGTH_BYTES + INDEX_OF_LENGTH_FIELD_IN_BLE_PACKET)
#define UART_HEADER_LEN (6)
#define BLE_HEADER_LEN (10)
#define PROTOVER (1)
#define US_PER_BYTE (8)
#define NOF_BLE_BYTES_NOT_INCLUDED_IN_BLE_LENGTH (10) /* Preamble (1) + AA (4) + Header (1) + Length (1) + CRC (3) = 10 Bytes */
#define BLE_METADATA_TRANFER_TIME_US (US_PER_BYTE * NOF_BLE_BYTES_NOT_INCLUDED_IN_BLE_LENGTH)
#define UART_HEADER_LENGTH (UART_PACKET_ACCESS_ADDRESS_INDEX)
#define BLE_MIN_PACKET_LENGTH (NOF_BLE_BYTES_NOT_INCLUDED_IN_BLE_LENGTH)
#define BLE_MAX_PACKET_LENGTH (50)
#define MIN_TOTAL_LENGTH (BLE_HEADER_LEN + BLE_MIN_PACKET_LENGTH)
#define MAX_TOTAL_LENGTH (UART_HEADER_LENGTH + BLE_MAX_PACKET_LENGTH)
#define BLE_LENGTH_POS (UART_HEADER_LENGTH + 5)
/*
* LEGACY DEFINES
* Defines used in the 0.9.7 version of the dissector
* Used to dissect packages with the old format
*/
#define _0_9_7_nordic_ble_MIN_LENGTH (8)
#define _0_9_7_UART_HEADER_LENGTH (17)
#define _0_9_7_BLE_EMPTY_PACKET_LENGTH (9)
#define _0_9_7_BLE_MAX_PACKET_LENGTH (50)
#define _0_9_7_MIN_TOTAL_LENGTH (_0_9_7_UART_HEADER_LENGTH + _0_9_7_BLE_EMPTY_PACKET_LENGTH)
#define _0_9_7_MAX_TOTAL_LENGTH (_0_9_7_UART_HEADER_LENGTH + _0_9_7_BLE_MAX_PACKET_LENGTH)
#define _0_9_7_BLE_LENGTH_POS (_0_9_7_UART_HEADER_LENGTH + 5)
#define _0_9_7_ID_POS (2)
#define _0_9_7_PACKET_COUNTER_POS (3)
#define _0_9_7_LENGTH_POS (7)
#define _0_9_7_FLAGS_POS (8)
#define _0_9_7_CHANNEL_POS (9)
#define _0_9_7_RSSI_POS (10)
#define _0_9_7_EVENT_COUNTER_POS (11)
#define _0_9_7_TIMESTAMP_POS (13)
#define _0_9_7_US_PER_BYTE (8)
#define _0_9_7_NOF_BLE_BYTES_NOT_INCLUDED_IN_BLE_LENGTH (10) /* Preamble (1) + AA (4) + Header (1) + Length (1) + CRC (3) = 10 Bytes */
#define _0_9_7_BLE_METADATA_TRANFER_TIME_US (_0_9_7_US_PER_BYTE * _0_9_7_NOF_BLE_BYTES_NOT_INCLUDED_IN_BLE_LENGTH)
void proto_reg_handoff_nordic_ble(void);
void proto_register_nordic_ble(void);
/* Initialize the protocol and registered fields */
static int proto_nordic_ble = -1;
/*static guint udp_port = 32954;*/
/*static guint user_dlt_num = 55;*/ /* corresponds to pcap network type value 157, user type 10. */
static gboolean legacy_mode = FALSE;
#ifndef TRANSPARENT
/* Initialize the subtree pointers */
static gint ett_nordic_ble = -1;
static gint ett_flags = -1;
/* Declared static as they need to be transferred between mode handlers and main dissector */
static gboolean g_bad_length;
static int hf_nordic_ble_board_id = -1;
static int hf_nordic_ble_header_length = -1;
static int hf_nordic_ble_payload_length = -1;
static int hf_nordic_ble_packet_counter = -1;
static int hf_nordic_ble_flags = -1;
static int hf_nordic_ble_crcok = -1;
static int hf_nordic_ble_encrypted = -1;
static int hf_nordic_ble_micok = -1;
static int hf_nordic_ble_direction = -1;
static int hf_nordic_ble_channel = -1;
static int hf_nordic_ble_rssi = -1;
static int hf_nordic_ble_event_counter = -1;
static int hf_nordic_ble_delta_time = -1;
static int hf_nordic_ble_delta_time_ss = -1;
static expert_field ei_nordic_ble_bad_crc = EI_INIT;
static expert_field ei_nordic_ble_bad_mic = EI_INIT;
static expert_field ei_nordic_ble_bad_length = EI_INIT;
/*static guint8 src_addr_to_use[6] = { 0,0,0,0,0,0 }; */
/*static guint8 src_addr_zero[6] = { 0,0,0,0,0,0 };*/
static const true_false_string direction_tfs =
{
"Master -> Slave",
"Slave -> Master"
};
static const true_false_string ok_incorrect =
{
"OK",
"Incorrect"
};
#endif /* TRANSPARENT */
#if 0
/* functions hiding versioning in dissectors */
static guint8
get_id_index(void)
{
return (legacy_mode ? _0_9_7_ID_POS : UART_PACKET_ID_INDEX);
}
#endif
static guint8
get_pc_index(void)
{
return (legacy_mode ? _0_9_7_PACKET_COUNTER_POS : UART_PACKET_COUNTER_INDEX);
}
static guint8
get_flags_index(void)
{
return (legacy_mode ? _0_9_7_FLAGS_POS : UART_PACKET_FLAGS_INDEX);
}
static guint8
get_ch_index(void)
{
return (legacy_mode ? _0_9_7_CHANNEL_POS : UART_PACKET_CHANNEL_INDEX);
}
static guint8
get_rssi_index(void)
{
return (legacy_mode ? _0_9_7_RSSI_POS : UART_PACKET_RSSI_INDEX);
}
static guint8
get_ec_index(void)
{
return (legacy_mode ? _0_9_7_EVENT_COUNTER_POS : UART_PACKET_EVENT_COUNTER_INDEX);
}
static guint8
get_td_index(void)
{
return (legacy_mode ? _0_9_7_TIMESTAMP_POS : UART_PACKET_TIMESTAMP_INDEX);
}
static guint8
get_header_length(void)
{
return (legacy_mode ? _0_9_7_UART_HEADER_LENGTH : UART_HEADER_LENGTH);
}
static guint8
get_packet_length_index(void)
{
return (legacy_mode ? _0_9_7_LENGTH_POS : UART_PACKET_PACKET_LEN_INDEX);
}
static guint8
get_total_len_min(void)
{
return (legacy_mode ? _0_9_7_MIN_TOTAL_LENGTH : MIN_TOTAL_LENGTH);
}
static guint8
get_total_len_max(void)
{
return (legacy_mode ? _0_9_7_MAX_TOTAL_LENGTH : MAX_TOTAL_LENGTH);
}
static guint8
get_metadata_transfer_time(void)
{
return (legacy_mode ? _0_9_7_BLE_METADATA_TRANFER_TIME_US : BLE_METADATA_TRANFER_TIME_US);
}
static guint8
get_us_per_byte(void)
{
return (legacy_mode ? _0_9_7_US_PER_BYTE : US_PER_BYTE);
}
static guint32 adv_aa = 0x8e89bed6;
/* next dissector */
static dissector_handle_t btle_dissector_handle = NULL;
static dissector_handle_t debug_handle = NULL;
#if 0
static gboolean
array_equal(const void* buf1, const void* buf2, int len)
{
gboolean return_value = FALSE;
int i;
for (i = 0; i < len; i++) {
if (((guint8*)buf1)[i] == ((guint8*)buf2)[i]) {
return_value = TRUE;
}
}
return return_value;
}
static void array_copy(void* dst, const void* src, int len)
{
int i;
for (i = 0; i < len; i++) {
((guint8*)dst)[i] = ((guint8*)src)[i];
}
}
#endif
static tvbuff_t *
dissect_board_id_and_strip_it_from_tvb(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
proto_tree_add_item(tree, hf_nordic_ble_board_id, tvb, BOARD_ID_INDEX, BOARD_ID_LENGTH, ENC_BIG_ENDIAN);
return tvb_new_subset(tvb, BOARD_ID_LENGTH, -1, -1);
}
static gboolean
dissect_lengths(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint8 hlen, plen;
proto_item* item;
gboolean bad_length = FALSE;
if (legacy_mode) {
hlen = tvb_get_guint8(tvb, _0_9_7_LENGTH_POS);
plen = _0_9_7_nordic_ble_MIN_LENGTH;
}
else {
hlen = tvb_get_guint8(tvb, UART_PACKET_HEADER_LEN_INDEX);
plen = tvb_get_guint8(tvb, UART_PACKET_PACKET_LEN_INDEX);
}
if ((hlen + plen) != tvb_captured_length(tvb)) {
if (!legacy_mode) {
proto_tree_add_item(tree, hf_nordic_ble_header_length, tvb, UART_PACKET_HEADER_LEN_INDEX, 1, ENC_BIG_ENDIAN);
}
item = proto_tree_add_item(tree, hf_nordic_ble_payload_length, tvb, get_packet_length_index(), 1, ENC_BIG_ENDIAN);
expert_add_info(pinfo, item, &ei_nordic_ble_bad_length);
bad_length = TRUE;
}
else if ((hlen + plen) < get_total_len_min()) {
if (!legacy_mode) {
proto_tree_add_item(tree, hf_nordic_ble_header_length, tvb, UART_PACKET_HEADER_LEN_INDEX, 1, ENC_BIG_ENDIAN);
}
item = proto_tree_add_item(tree, hf_nordic_ble_payload_length, tvb, get_packet_length_index(), 1, ENC_BIG_ENDIAN);
expert_add_info(pinfo, item, &ei_nordic_ble_bad_length);
bad_length = TRUE;
}
else if ((hlen + plen) > get_total_len_max()) {
if (!legacy_mode) {
proto_tree_add_item(tree, hf_nordic_ble_header_length, tvb, UART_PACKET_HEADER_LEN_INDEX, 1, ENC_BIG_ENDIAN);
}
item = proto_tree_add_item(tree, hf_nordic_ble_payload_length, tvb, get_packet_length_index(), 1, ENC_BIG_ENDIAN);
expert_add_info(pinfo, item, &ei_nordic_ble_bad_length);
bad_length = TRUE;
}
return bad_length;
}
static void
dissect_packet_counter(tvbuff_t *tvb, proto_tree *tree)
{
proto_tree_add_item(tree, hf_nordic_ble_packet_counter, tvb, get_pc_index(), 2, ENC_LITTLE_ENDIAN);
}
#if 0
static void
dissect_id(tvbuff_t *tvb, proto_tree *tree)
{
guint8 id;
id = tvb_get_guint8(tvb, get_id_index());
}
#endif
static void
dissect_flags(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, btle_context_t *context)
{
guint8 flags;
gboolean dir, encrypted;
/*gboolean bad_length = FALSE;*/
proto_item *flags_item, *item;
proto_tree *flags_tree;
context->crc_checked_at_capture = 1;
flags = tvb_get_guint8(tvb, get_flags_index());
context->crc_valid_at_capture = !!(flags & 1);
dir = !!(flags & 2);
encrypted = !!(flags & 4);
context->mic_valid_at_capture = !!(flags & 8);
if (dir) {
set_address(&pinfo->src, AT_STRINGZ, 7, "Master");
set_address(&pinfo->dst, AT_STRINGZ, 6, "Slave");
context->direction = BTLE_DIR_MASTER_SLAVE;
pinfo->p2p_dir = P2P_DIR_SENT;
}
else {
set_address(&pinfo->src, AT_STRINGZ, 6, "Slave");
set_address(&pinfo->dst, AT_STRINGZ, 7, "Master");
context->direction = BTLE_DIR_SLAVE_MASTER;
pinfo->p2p_dir = P2P_DIR_RECV;
}
flags_item = proto_tree_add_item(tree, hf_nordic_ble_flags, tvb, get_flags_index(), 1, ENC_BIG_ENDIAN);
flags_tree = proto_item_add_subtree(flags_item, ett_flags);
if (encrypted) /* if encrypted, add MIC status */
{
context->mic_checked_at_capture = 1;
item = proto_tree_add_bits_item(flags_tree, hf_nordic_ble_micok, tvb, get_flags_index() * 8 + 4, 1, ENC_LITTLE_ENDIAN);
if (!context->mic_valid_at_capture) {
/* MIC is bad */
expert_add_info(pinfo, item, &ei_nordic_ble_bad_mic);
}
}
proto_tree_add_bits_item(flags_tree, hf_nordic_ble_encrypted, tvb, get_flags_index() * 8 + 5, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_bits_item(flags_tree, hf_nordic_ble_direction, tvb, get_flags_index() * 8 + 6, 1, ENC_LITTLE_ENDIAN);
item = proto_tree_add_bits_item(flags_tree, hf_nordic_ble_crcok, tvb, get_flags_index() * 8 + 7, 1, ENC_LITTLE_ENDIAN);
if (!context->crc_valid_at_capture) {
/* CRC is bad */
expert_add_info(pinfo, item, &ei_nordic_ble_bad_crc);
}
}
static void
dissect_channel(tvbuff_t *tvb, proto_tree *tree)
{
/*guint8 channel; */
/*channel = tvb_get_guint8(tvb, get_ch_index()); */
proto_tree_add_item(tree, hf_nordic_ble_channel, tvb, get_ch_index(), 1, ENC_BIG_ENDIAN);
}
static void
dissect_rssi(tvbuff_t *tvb, proto_tree *tree)
{
gint32 rssi;
rssi = (-1)*((gint32)tvb_get_guint8(tvb, get_rssi_index()));
proto_tree_add_int(tree, hf_nordic_ble_rssi, tvb, get_rssi_index(), 1, rssi);
}
static void
dissect_event_counter(tvbuff_t *tvb, proto_tree *tree)
{
guint32 aa;
aa = tvb_get_letohl(tvb, get_header_length());
if (aa != adv_aa) {
proto_tree_add_item(tree, hf_nordic_ble_event_counter, tvb, get_ec_index(), 2, ENC_LITTLE_ENDIAN);
}
}
static void
dissect_ble_delta_time(tvbuff_t *tvb, proto_tree *tree)
{
static guint8 previous_ble_packet_length = 0;
guint32 delta_time, delta_time_ss;
/* end - start */
delta_time = (guint32)tvb_get_letohl(tvb, get_td_index());
proto_tree_add_item(tree, hf_nordic_ble_delta_time, tvb, get_td_index(), 4, ENC_LITTLE_ENDIAN);
/* start - start */
delta_time_ss = get_metadata_transfer_time() + (get_us_per_byte() * previous_ble_packet_length) + delta_time;
proto_tree_add_uint(tree, hf_nordic_ble_delta_time_ss, tvb, get_td_index(), 4, delta_time_ss);
previous_ble_packet_length = tvb_get_guint8(tvb, get_packet_length_index());
}
/*
* Specific for 1.0.0+ :
*/
#if 0
static void
dissect_ble_hlen(tvbuff_t *tvb, proto_tree *tree)
{
guint8 ble_hlen;
ble_hlen = tvb_get_guint8(tvb, UART_PACKET_BLE_HEADER_LEN_INDEX);
}
static void
dissect_protover(tvbuff_t *tvb, proto_tree *tree)
{
guint8 protover;
protover = tvb_get_guint8(tvb, UART_PACKET_PROTOVER_INDEX);
}
#endif
static guint32
is_0_9_7_packet(tvbuff_t *tvb)
{
/* legacy packets started with 0xBEEF */
if (tvb_get_guint8(tvb, 0) == 0xBE &&
tvb_get_guint8(tvb, 1) == 0xEF) {
return 1;
}
else {
return 0;
}
}
static void
dissect_header_0_9_7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, btle_context_t *context)
{
proto_item *ti;
proto_tree *nordic_ble_tree;/*, *flags_tree;*/
/* gboolean bad_crc = FALSE;*/
/* create display subtree for the protocol */
ti = proto_tree_add_item(tree, proto_nordic_ble, tvb, 0, -1, ENC_NA);
nordic_ble_tree = proto_item_add_subtree(ti, ett_nordic_ble);
/*** PROTOCOL TREE ***/
dissect_packet_counter(tvb, nordic_ble_tree);
dissect_flags(tvb, pinfo, nordic_ble_tree, context);
dissect_channel(tvb, nordic_ble_tree);
dissect_rssi(tvb, nordic_ble_tree);
dissect_event_counter(tvb, nordic_ble_tree);
g_bad_length = dissect_lengths(tvb, pinfo, nordic_ble_tree);
dissect_ble_delta_time(tvb, nordic_ble_tree);
}
static void
dissect_header_1_0_0(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, btle_context_t *context)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti;
proto_tree *nordic_ble_tree;
/*** PROTOCOL TREE ***/
ti = proto_tree_add_item(tree, proto_nordic_ble, tvb, 0, -1, ENC_NA);
nordic_ble_tree = proto_item_add_subtree(ti, ett_nordic_ble);
tvb = dissect_board_id_and_strip_it_from_tvb(tvb, pinfo, nordic_ble_tree);
g_bad_length = dissect_lengths(tvb, pinfo, nordic_ble_tree);
/*dissect_protover(tvb, nordic_ble_tree); This does not do anything ???*/
dissect_packet_counter(tvb, nordic_ble_tree);
/*dissect_id(tvb, nordic_ble_tree); This does not do anything ???*/
/*dissect_ble_hlen(tvb, nordic_ble_tree); This does not do anything ???*/
dissect_flags(tvb, pinfo, nordic_ble_tree, context);
dissect_channel(tvb, nordic_ble_tree);
dissect_rssi(tvb, nordic_ble_tree);
dissect_event_counter(tvb, nordic_ble_tree);
dissect_ble_delta_time(tvb, nordic_ble_tree);
}
/* Main entry point for sniffer, any version */
static int
dissect_nordic_ble(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
tvbuff_t *payload_tvb;
btle_context_t *context;
context = wmem_new0(wmem_packet_scope(), btle_context_t);
g_bad_length = FALSE;
legacy_mode = is_0_9_7_packet(tvb);
if (legacy_mode) {
dissect_header_0_9_7(tvb, pinfo, tree, context);
payload_tvb = tvb_new_subset(tvb, _0_9_7_UART_HEADER_LENGTH, -1, tvb_captured_length(tvb) - _0_9_7_UART_HEADER_LENGTH);
}
else {
dissect_header_1_0_0(tvb, pinfo, tree, context);
/* have to take BOARD_ID into account, as the stripped version is local to dissect_1_0_0 */
payload_tvb = tvb_new_subset(tvb, UART_HEADER_LENGTH + BOARD_ID_LENGTH, -1,
tvb_captured_length(tvb) - UART_HEADER_LENGTH - BOARD_ID_LENGTH);
}
if (!g_bad_length) {
call_dissector_with_data(btle_dissector_handle, payload_tvb, pinfo, tree, context);
}
if ((context->mic_checked_at_capture) && (!context->mic_valid_at_capture)) {
col_add_str(pinfo->cinfo, COL_INFO, "Encrypted packet decrypted incorrectly (bad MIC)");
}
if (debug_handle) {
call_dissector(debug_handle, payload_tvb, pinfo, tree);
}
if (legacy_mode) {
return _0_9_7_UART_HEADER_LENGTH;
}
else {
return UART_HEADER_LENGTH + BOARD_ID_LENGTH;
}
}
/* Register the protocol with Wireshark.
*
* This format is require because a script is used to build the C function that
* calls all the protocol registration.
*/
void
proto_register_nordic_ble(void)
{
/* module_t *nordic_ble_module; */
/* Setup list of header fields See Section 1.6.1 of README.developer for
* details.
*/
static hf_register_info hf[] = {
{ &hf_nordic_ble_board_id,
{ "Board", "nordic_ble.board_id",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_nordic_ble_header_length,
{ "Length of header", "nordic_ble.hlen",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_nordic_ble_payload_length,
{ "Length of payload", "nordic_ble.plen",
FT_UINT8, BASE_DEC, NULL, 0x0,
"Payload length", HFILL }
},
{ &hf_nordic_ble_packet_counter,
{ "UART packet counter", "nordic_ble.packet_counter",
FT_UINT16, BASE_DEC, NULL, 0x0,
"Global packet counter for packets sent on UART", HFILL }
},
{ &hf_nordic_ble_flags,
{ "Flags", "nordic_ble.flags",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_nordic_ble_crcok,
{ "CRC", "nordic_ble.crcok",
FT_BOOLEAN, BASE_NONE, TFS(&ok_incorrect), 0x0,
"Cyclic Redundancy Check state", HFILL }
},
{ &hf_nordic_ble_direction,
{ "Direction", "nordic_ble.direction",
FT_BOOLEAN, BASE_NONE, TFS(&direction_tfs), 0x0,
NULL, HFILL }
},
{ &hf_nordic_ble_encrypted,
{ "Encrypted", "nordic_ble.encrypted",
FT_BOOLEAN, BASE_NONE, TFS(&tfs_yes_no), 0x0,
"Was the packet encrypted", HFILL }
},
{ &hf_nordic_ble_micok,
{ "MIC", "nordic_ble.micok",
FT_BOOLEAN, BASE_NONE, TFS(&ok_incorrect), 0x0,
"Message Integrity Check state", HFILL }
},
{ &hf_nordic_ble_channel,
{ "Channel", "nordic_ble.channel",
FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }
},
{ &hf_nordic_ble_rssi,
{ "RSSI (dBm)", "nordic_ble.rssi",
FT_INT16, BASE_DEC, NULL, 0x0,
"Received Signal Strength Indicator", HFILL }
},
{ &hf_nordic_ble_event_counter,
{ "Event counter", "nordic_ble.event_counter",
FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_nordic_ble_delta_time,
{ "Delta time (us end to start)", "nordic_ble.delta_time",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Delta time: us since last reported packet", HFILL }
},
{ &hf_nordic_ble_delta_time_ss,
{ "Delta time (us start to start)", "nordic_ble.delta_time_ss",
FT_UINT32, BASE_DEC, NULL, 0x0,
"Delta time: us since start of last reported packet", HFILL }
}
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_nordic_ble,
&ett_flags
};
static ei_register_info ei[] = {
{ &ei_nordic_ble_bad_crc, { "nordic_ble.crc.bad", PI_CHECKSUM, PI_ERROR, "CRC is bad", EXPFILL }},
{ &ei_nordic_ble_bad_mic, { "nordic_ble.mic.bad", PI_CHECKSUM, PI_ERROR, "MIC is bad", EXPFILL }},
{ &ei_nordic_ble_bad_length, { "nordic_ble.length.bad", PI_MALFORMED, PI_ERROR, "Length is incorrect", EXPFILL }},
};
expert_module_t* expert_nordic_ble;
/* Register the protocol name and description */
proto_nordic_ble = proto_register_protocol("Nordic BLE sniffer meta",
"NORDIC_BLE", "nordic_ble");
register_dissector("nordic_ble", dissect_nordic_ble, proto_nordic_ble);
expert_nordic_ble = expert_register_protocol(proto_nordic_ble);
expert_register_field_array(expert_nordic_ble, ei, array_length(ei));
/* Required function calls to register the header fields and subtrees */
proto_register_field_array(proto_nordic_ble, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_nordic_ble(void)
{
dissector_handle_t nordic_ble_handle;
/*static int currentPort;*/
nordic_ble_handle = create_dissector_handle(dissect_nordic_ble, proto_nordic_ble);
btle_dissector_handle = find_dissector("btle");
debug_handle = find_dissector("nordic_debug");
#ifdef TRANSPARENT
dissector_add_uint_with_preference("udp.port", udp_port, btle_dissector_handle);
#else
/*dissector_add_uint("wtap_encap", user_dlt_num, nordic_ble_handle);*/
dissector_add_for_decode_as_with_preference("udp.port", nordic_ble_handle);
#endif
}
/*
* Editor modelines - http://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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