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wireshark/epan/dissectors/packet-iso15765.c

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/* packet-iso15765.c
* Routines for iso15765 protocol packet disassembly
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* Support for FlexRay variant, see: https://www.autosar.org/fileadmin/user_upload/standards/classic/20-11/AUTOSAR_SWS_FlexRayARTransportLayer.pdf
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/decode_as.h>
#include <epan/reassemble.h>
#include <epan/expert.h>
#include <epan/proto_data.h>
#include <epan/uat.h>
#include <wsutil/bits_ctz.h>
#include "packet-socketcan.h"
#include "packet-lin.h"
#include "packet-flexray.h"
#include "packet-iso15765.h"
#include "packet-autosar-ipdu-multiplexer.h"
void proto_register_iso15765(void);
void proto_reg_handoff_iso15765(void);
#define ISO15765_PCI_LEN 1
#define ISO15765_PCI_FD_SF_LEN 2
#define ISO15765_PCI_FD_FF_LEN 6
#define ISO15765_MESSAGE_TYPE_MASK 0xF0
#define ISO15765_MESSAGE_TYPES_SINGLE_FRAME 0
#define ISO15765_MESSAGE_TYPES_FIRST_FRAME 1
#define ISO15765_MESSAGE_TYPES_CONSECUTIVE_FRAME 2
#define ISO15765_MESSAGE_TYPES_FLOW_CONTROL 3
#define ISO15765_MESSAGE_TYPES_FR_SINGLE_FRAME_EXT 4
#define ISO15765_MESSAGE_TYPES_FR_FIRST_FRAME_EXT 5
#define ISO15765_MESSAGE_TYPES_FR_CONSECUTIVE_FRAME_2 6
#define ISO15765_MESSAGE_TYPES_FR_ACK_FRAME 7
#define ISO15765_MESSAGE_DATA_LENGTH_MASK 0x0F
#define ISO15765_FD_MESSAGE_DATA_LENGTH_MASK 0x00FF
#define ISO15765_MESSAGE_EXTENDED_FRAME_LENGTH_MASK 0x0F
#define ISO15765_MESSAGE_FRAME_LENGTH_OFFSET (ISO15765_PCI_LEN)
#define ISO15765_MESSAGE_FRAME_LENGTH_LEN 1
#define ISO15765_MESSAGE_SEQUENCE_NUMBER_MASK 0x0F
#define ISO15765_MESSAGE_FLOW_STATUS_MASK 0x0F
#define ISO15765_FC_BS_OFFSET (ISO15765_PCI_LEN)
#define ISO15765_FC_BS_LEN 1
#define ISO15765_FC_STMIN_OFFSET (ISO15765_FC_BS_OFFSET + ISO15765_FC_BS_LEN)
#define ISO15765_FC_STMIN_LEN 1
#define ISO15765_MESSAGE_AUTOSAR_ACK_MASK 0xF0
#define ISO15765_AUTOSAR_ACK_OFFSET 3
struct iso15765_identifier
{
guint32 id;
guint32 seq;
guint16 frag_id;
gboolean last;
};
typedef struct iso15765_identifier iso15765_identifier_t;
struct iso15765_frame
{
guint32 seq;
guint32 offset;
guint32 len;
gboolean error;
gboolean complete;
guint16 last_frag_id;
guint8 frag_id_high[16];
};
typedef struct iso15765_frame iso15765_frame_t;
static const value_string iso15765_message_types[] = {
{ISO15765_MESSAGE_TYPES_SINGLE_FRAME, "Single Frame"},
{ISO15765_MESSAGE_TYPES_FIRST_FRAME, "First Frame"},
{ISO15765_MESSAGE_TYPES_CONSECUTIVE_FRAME, "Consecutive Frame"},
{ISO15765_MESSAGE_TYPES_FLOW_CONTROL, "Flow control"},
{ISO15765_MESSAGE_TYPES_FR_SINGLE_FRAME_EXT, "Single Frame Ext"},
{ISO15765_MESSAGE_TYPES_FR_FIRST_FRAME_EXT, "First Frame Ext"},
{ISO15765_MESSAGE_TYPES_FR_CONSECUTIVE_FRAME_2, "Consecutive Frame 2"},
{ISO15765_MESSAGE_TYPES_FR_ACK_FRAME, "Ack Frame"},
{0, NULL}
};
static const value_string iso15765_flow_status_types[] = {
{0, "Continue to Send"},
{1, "Wait"},
{2, "Overflow"},
{0, NULL}
};
#define NORMAL_ADDRESSING 1
#define EXTENDED_ADDRESSING 2
#define ZERO_BYTE_ADDRESSING 0
#define ONE_BYTE_ADDRESSING 1
#define TWO_BYTE_ADDRESSING 2
static gint addressing = NORMAL_ADDRESSING;
static gint flexray_addressing = ONE_BYTE_ADDRESSING;
static guint flexray_segment_size_limit = 0;
static guint window = 8;
static range_t *configured_can_ids= NULL;
static range_t *configured_ext_can_ids = NULL;
static gboolean register_lin_diag_frames = TRUE;
static range_t *configured_ipdum_pdu_ids = NULL;
static gint ipdum_addressing = ZERO_BYTE_ADDRESSING;
/* Encoding */
static const enum_val_t enum_addressing[] = {
{"normal", "Normal addressing", NORMAL_ADDRESSING},
{"extended", "Extended addressing", EXTENDED_ADDRESSING},
{NULL, NULL, 0}
};
/* Encoding */
static const enum_val_t enum_flexray_addressing[] = {
{"1 Byte", "1 byte addressing", ONE_BYTE_ADDRESSING},
{"2 byte", "2 byte addressing", TWO_BYTE_ADDRESSING},
{NULL, NULL, 0}
};
static const enum_val_t enum_ipdum_addressing[] = {
{"0 Byte", "0 byte addressing", ZERO_BYTE_ADDRESSING},
{"1 Byte", "1 byte addressing", ONE_BYTE_ADDRESSING},
{"2 byte", "2 byte addressing", TWO_BYTE_ADDRESSING},
{NULL, NULL, 0}
};
static int hf_iso15765_address = -1;
static int hf_iso15765_target_address = -1;
static int hf_iso15765_source_address = -1;
static int hf_iso15765_message_type = -1;
static int hf_iso15765_data_length = -1;
static int hf_iso15765_frame_length = -1;
static int hf_iso15765_sequence_number = -1;
static int hf_iso15765_flow_status = -1;
static int hf_iso15765_fc_bs = -1;
static int hf_iso15765_fc_stmin = -1;
static int hf_iso15765_autosar_ack = -1;
static gint ett_iso15765 = -1;
static expert_field ei_iso15765_message_type_bad = EI_INIT;
static int proto_iso15765 = -1;
static dissector_handle_t iso15765_handle_can = NULL;
static dissector_handle_t iso15765_handle_lin = NULL;
static dissector_handle_t iso15765_handle_flexray = NULL;
static dissector_handle_t iso15765_handle_ipdum = NULL;
static dissector_table_t subdissector_table;
static reassembly_table iso15765_reassembly_table;
static wmem_map_t *iso15765_frame_table = NULL;
static int hf_iso15765_fragments = -1;
static int hf_iso15765_fragment = -1;
static int hf_iso15765_fragment_overlap = -1;
static int hf_iso15765_fragment_overlap_conflicts = -1;
static int hf_iso15765_fragment_multiple_tails = -1;
static int hf_iso15765_fragment_too_long_fragment = -1;
static int hf_iso15765_fragment_error = -1;
static int hf_iso15765_fragment_count = -1;
static int hf_iso15765_reassembled_in = -1;
static int hf_iso15765_reassembled_length = -1;
static gint ett_iso15765_fragment = -1;
static gint ett_iso15765_fragments = -1;
static const fragment_items iso15765_frag_items = {
/* Fragment subtrees */
&ett_iso15765_fragment,
&ett_iso15765_fragments,
/* Fragment fields */
&hf_iso15765_fragments,
&hf_iso15765_fragment,
&hf_iso15765_fragment_overlap,
&hf_iso15765_fragment_overlap_conflicts,
&hf_iso15765_fragment_multiple_tails,
&hf_iso15765_fragment_too_long_fragment,
&hf_iso15765_fragment_error,
&hf_iso15765_fragment_count,
/* Reassembled in field */
&hf_iso15765_reassembled_in,
/* Reassembled length field */
&hf_iso15765_reassembled_length,
/* Reassembled data field */
NULL,
"ISO15765 fragments"
};
/* UAT for address encoded into CAN IDs */
typedef struct config_can_addr_mapping {
gboolean extended_address;
guint32 can_id;
guint32 can_id_mask;
guint32 source_addr_mask;
guint32 target_addr_mask;
guint32 ecu_addr_mask;
} config_can_addr_mapping_t;
static config_can_addr_mapping_t *config_can_addr_mappings = NULL;
static guint config_can_addr_mappings_num = 0;
#define DATAFILE_CAN_ADDR_MAPPING "ISO15765_can_id_mappings"
UAT_BOOL_CB_DEF(config_can_addr_mappings, extended_address, config_can_addr_mapping_t)
UAT_HEX_CB_DEF(config_can_addr_mappings, can_id, config_can_addr_mapping_t)
UAT_HEX_CB_DEF(config_can_addr_mappings, can_id_mask, config_can_addr_mapping_t)
UAT_HEX_CB_DEF(config_can_addr_mappings, source_addr_mask, config_can_addr_mapping_t)
UAT_HEX_CB_DEF(config_can_addr_mappings, target_addr_mask, config_can_addr_mapping_t)
UAT_HEX_CB_DEF(config_can_addr_mappings, ecu_addr_mask, config_can_addr_mapping_t)
static void *
copy_config_can_addr_mapping_cb(void *n, const void *o, size_t size _U_) {
config_can_addr_mapping_t *new_rec = (config_can_addr_mapping_t *)n;
const config_can_addr_mapping_t *old_rec = (const config_can_addr_mapping_t *)o;
new_rec->extended_address = old_rec->extended_address;
new_rec->can_id = old_rec->can_id;
new_rec->can_id_mask = old_rec->can_id_mask;
new_rec->source_addr_mask = old_rec->source_addr_mask;
new_rec->target_addr_mask = old_rec->target_addr_mask;
new_rec->ecu_addr_mask = old_rec->ecu_addr_mask;
return new_rec;
}
static gboolean
update_config_can_addr_mappings(void *r, char **err) {
config_can_addr_mapping_t *rec = (config_can_addr_mapping_t *)r;
if (rec->source_addr_mask == 0 && rec->target_addr_mask == 0 && rec->ecu_addr_mask == 0) {
*err = ws_strdup_printf("You need to define the ECU Mask OR Source Mask/Target Mask!");
return FALSE;
}
if ((rec->source_addr_mask != 0 || rec->target_addr_mask != 0) && rec->ecu_addr_mask != 0) {
*err = ws_strdup_printf("You can only use Source Address Mask/Target Address Mask OR ECU Address Mask! Not both at the same time!");
return FALSE;
}
if ((rec->source_addr_mask == 0 || rec->target_addr_mask == 0) && rec->ecu_addr_mask == 0) {
*err = ws_strdup_printf("You can only use Source Address Mask and Target Address Mask in combination!");
return FALSE;
}
if (rec->extended_address) {
if ((rec->source_addr_mask & ~CAN_EFF_MASK) != 0) {
*err = ws_strdup_printf("Source Address Mask covering bits not allowed for extended IDs (29bit)!");
return FALSE;
}
if ((rec->target_addr_mask & ~CAN_EFF_MASK) != 0) {
*err = ws_strdup_printf("Target Address Mask covering bits not allowed for extended IDs (29bit)!");
return FALSE;
}
if ((rec->ecu_addr_mask & ~CAN_EFF_MASK) != 0) {
*err = ws_strdup_printf("ECU Address Mask covering bits not allowed for extended IDs (29bit)!");
return FALSE;
}
} else {
if ((rec->source_addr_mask & ~CAN_SFF_MASK) != 0) {
*err = ws_strdup_printf("Source Address Mask covering bits not allowed for standard IDs (11bit)!");
return FALSE;
}
if ((rec->target_addr_mask & ~CAN_SFF_MASK) != 0) {
*err = ws_strdup_printf("Target Address Mask covering bits not allowed for standard IDs (11bit)!");
return FALSE;
}
if ((rec->ecu_addr_mask & ~CAN_SFF_MASK) != 0) {
*err = ws_strdup_printf("ECU Address Mask covering bits not allowed for standard IDs (11bit)!");
return FALSE;
}
}
return TRUE;
}
static void
free_config_can_addr_mappings(void *r _U_) {
/* do nothing right now */
}
static void
post_update_config_can_addr_mappings_cb(void) {
/* do nothing right now */
}
static guint16
masked_guint16_value(const guint16 value, const guint16 mask)
{
return (value & mask) >> ws_ctz(mask);
}
/*
* setting addresses to 0xffffffff, if not found or configured
* returning number of addresses (0: none, 1:ecu (both addr same), 2:source+target)
*/
static guint8
find_config_can_addr_mapping(gboolean ext_id, guint32 can_id, guint16 *source_addr, guint16 *target_addr) {
config_can_addr_mapping_t *tmp = NULL;
guint32 i;
if (source_addr == NULL || target_addr == NULL || config_can_addr_mappings == NULL) {
return 0;
}
for (i = 0; i < config_can_addr_mappings_num; i++) {
if (config_can_addr_mappings[i].extended_address == ext_id &&
(config_can_addr_mappings[i].can_id & config_can_addr_mappings[i].can_id_mask) ==
(can_id & config_can_addr_mappings[i].can_id_mask)) {
tmp = &(config_can_addr_mappings[i]);
break;
}
}
if (tmp != NULL) {
if (tmp->ecu_addr_mask != 0) {
*source_addr = masked_guint16_value(can_id, tmp->ecu_addr_mask);
*target_addr = *source_addr;
return 1;
}
if (tmp->source_addr_mask != 0 && tmp->target_addr_mask != 0) {
*source_addr = masked_guint16_value(can_id, tmp->source_addr_mask);
*target_addr = masked_guint16_value(can_id, tmp->target_addr_mask);
return 2;
}
}
return 0;
}
static int
dissect_iso15765(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 bus_type, guint32 frame_id, guint32 frame_length)
{
static guint32 msg_seqid = 0;
proto_tree *iso15765_tree;
proto_item *ti;
proto_item *message_type_item;
tvbuff_t* next_tvb = NULL;
guint16 pci, message_type;
iso15765_identifier_t* iso15765_info;
/* LIN is always extended addressing */
guint8 ae = (addressing == NORMAL_ADDRESSING && bus_type != ISO15765_TYPE_LIN) ? 0 : 1;
guint16 frag_id_low = 0;
guint32 offset;
gint32 data_length;
guint32 full_len;
gboolean fragmented = FALSE;
gboolean complete = FALSE;
iso15765_info_t iso15765data;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISO15765");
col_clear(pinfo->cinfo, COL_INFO);
iso15765_info = (iso15765_identifier_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_iso15765, 0);
if (!iso15765_info) {
iso15765_info = wmem_new0(wmem_file_scope(), iso15765_identifier_t);
iso15765_info->id = frame_id;
iso15765_info->last = FALSE;
p_add_proto_data(wmem_file_scope(), pinfo, proto_iso15765, 0, iso15765_info);
}
ti = proto_tree_add_item(tree, proto_iso15765, tvb, 0, -1, ENC_NA);
iso15765_tree = proto_item_add_subtree(ti, ett_iso15765);
iso15765data.bus_type = bus_type;
iso15765data.id = frame_id;
iso15765data.number_of_addresses_valid = 0;
if (bus_type == ISO15765_TYPE_FLEXRAY) {
guint32 tmp;
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_source_address, tvb, 0, flexray_addressing, ENC_BIG_ENDIAN, &tmp);
iso15765data.source_address = (guint16)tmp;
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_target_address, tvb, flexray_addressing, flexray_addressing, ENC_BIG_ENDIAN, &tmp);
iso15765data.target_address = (guint16)tmp;
iso15765data.number_of_addresses_valid = 2;
ae = 2 * flexray_addressing;
} else if (bus_type == ISO15765_TYPE_IPDUM && ipdum_addressing > 0) {
guint32 tmp;
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_source_address, tvb, 0, ipdum_addressing, ENC_BIG_ENDIAN, &tmp);
iso15765data.source_address = (guint16)tmp;
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_target_address, tvb, ipdum_addressing, ipdum_addressing, ENC_BIG_ENDIAN, &tmp);
iso15765data.target_address = (guint16)tmp;
iso15765data.number_of_addresses_valid = 2;
ae = 2 * ipdum_addressing;
} else {
if (ae != 0) {
guint32 tmp;
iso15765data.number_of_addresses_valid = 1;
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_address, tvb, 0, ae, ENC_NA, &tmp);
iso15765data.source_address = (guint16)tmp;
iso15765data.target_address = (guint16)tmp;
} else {
/* Address implicit encoded? */
if (bus_type == ISO15765_TYPE_CAN || bus_type == ISO15765_TYPE_CAN_FD) {
gboolean ext_id = (CAN_EFF_FLAG & frame_id) == CAN_EFF_FLAG;
guint32 can_id = ext_id ? frame_id & CAN_EFF_MASK : frame_id & CAN_SFF_MASK;
iso15765data.number_of_addresses_valid = find_config_can_addr_mapping(ext_id, can_id, &(iso15765data.source_address), &(iso15765data.target_address));
}
}
}
message_type_item = proto_tree_add_item(iso15765_tree, hf_iso15765_message_type, tvb,
ae, ISO15765_PCI_LEN, ENC_BIG_ENDIAN);
pci = tvb_get_guint8(tvb, ae);
message_type = masked_guint16_value(pci, ISO15765_MESSAGE_TYPE_MASK);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(message_type, iso15765_message_types, "Unknown (0x%02x)"));
switch(message_type) {
case ISO15765_MESSAGE_TYPES_SINGLE_FRAME: {
if (frame_length > 8 && (pci & ISO15765_MESSAGE_DATA_LENGTH_MASK) == 0) {
offset = ae + ISO15765_PCI_FD_SF_LEN;
data_length = tvb_get_guint8(tvb, ae + 1);
proto_tree_add_item(iso15765_tree, hf_iso15765_data_length, tvb, ae + 1, 1, ENC_BIG_ENDIAN);
} else {
offset = ae + ISO15765_PCI_LEN;
data_length = masked_guint16_value(pci, ISO15765_MESSAGE_DATA_LENGTH_MASK);
proto_tree_add_uint(iso15765_tree, hf_iso15765_data_length, tvb, ae, 1, data_length);
}
next_tvb = tvb_new_subset_length_caplen(tvb, offset, data_length, data_length);
complete = TRUE;
col_append_fstr(pinfo->cinfo, COL_INFO, "(Len: %d)", data_length);
break;
}
case ISO15765_MESSAGE_TYPES_FIRST_FRAME: {
pci = tvb_get_guint16(tvb, ae, ENC_BIG_ENDIAN);
if (pci == 0x1000) {
full_len = tvb_get_guint32(tvb, ae + 2, ENC_BIG_ENDIAN);
proto_tree_add_item(iso15765_tree, hf_iso15765_frame_length, tvb, ae + 2, 4, ENC_BIG_ENDIAN);
offset = ae + 2 + 4;
} else {
full_len = tvb_get_guint16(tvb, ae, ENC_BIG_ENDIAN) & 0xFFF;
proto_tree_add_uint(iso15765_tree, hf_iso15765_frame_length, tvb, ae, 2, full_len);
offset = ae + 2;
}
data_length = tvb_reported_length(tvb) - offset;
if (bus_type == ISO15765_TYPE_FLEXRAY && flexray_segment_size_limit != 0
&& (guint32)data_length > flexray_segment_size_limit - (offset - ae)) {
data_length = flexray_segment_size_limit - (offset - ae);
}
fragmented = TRUE;
frag_id_low = 0;
/* Save information */
if (!(pinfo->fd->visited)) {
iso15765_frame_t *iso15765_frame = wmem_new0(wmem_file_scope(), iso15765_frame_t);
iso15765_frame->seq = iso15765_info->seq = ++msg_seqid;
iso15765_frame->len = full_len;
wmem_map_insert(iso15765_frame_table, GUINT_TO_POINTER(iso15765_info->seq), iso15765_frame);
}
col_append_fstr(pinfo->cinfo, COL_INFO, "(Frame Len: %d)", full_len);
break;
}
case ISO15765_MESSAGE_TYPES_FR_CONSECUTIVE_FRAME_2:
case ISO15765_MESSAGE_TYPES_CONSECUTIVE_FRAME: {
offset = ae + ISO15765_PCI_LEN;
data_length = tvb_reported_length(tvb) - offset;
frag_id_low = masked_guint16_value(pci, ISO15765_MESSAGE_SEQUENCE_NUMBER_MASK);
fragmented = TRUE;
if (bus_type == ISO15765_TYPE_FLEXRAY && flexray_segment_size_limit != 0
&& (guint32)data_length > flexray_segment_size_limit - (offset - ae)) {
data_length = flexray_segment_size_limit - (offset - ae);
}
/* Save information */
if (!(pinfo->fd->visited)) {
iso15765_info->seq = msg_seqid;
}
proto_tree_add_item(iso15765_tree, hf_iso15765_sequence_number,
tvb, ae, ISO15765_PCI_LEN, ENC_BIG_ENDIAN);
col_append_fstr(pinfo->cinfo, COL_INFO, "(Seq: %d)", (pci & ISO15765_MESSAGE_DATA_LENGTH_MASK));
break;
}
case ISO15765_MESSAGE_TYPES_FR_ACK_FRAME:
case ISO15765_MESSAGE_TYPES_FLOW_CONTROL: {
guint32 status = 0;
guint32 bs = 0;
guint32 stmin = 0;
data_length = 0;
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_flow_status, tvb, ae,
ISO15765_PCI_LEN, ENC_BIG_ENDIAN, &status);
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_fc_bs, tvb, ae + ISO15765_FC_BS_OFFSET,
ISO15765_FC_BS_LEN, ENC_BIG_ENDIAN, &bs);
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_fc_stmin, tvb, ae + ISO15765_FC_STMIN_OFFSET,
ISO15765_FC_STMIN_LEN, ENC_BIG_ENDIAN, &stmin);
col_append_fstr(pinfo->cinfo, COL_INFO, "(Status: %d, Block size: 0x%x, Separation time minimum: %d ms)",
status, bs, stmin);
if (message_type == ISO15765_MESSAGE_TYPES_FR_ACK_FRAME) {
guint32 ack = 0;
guint32 sn = 0;
offset = ae + ISO15765_FC_STMIN_OFFSET + ISO15765_FC_STMIN_LEN;
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_autosar_ack, tvb, offset, 1, ENC_BIG_ENDIAN, &ack);
proto_tree_add_item_ret_uint(iso15765_tree, hf_iso15765_sequence_number, tvb, offset, 1, ENC_BIG_ENDIAN, &sn);
col_append_fstr(pinfo->cinfo, COL_INFO, "(Status: %d, Block size: 0x%x, Separation time minimum: %d ms, Ack: %d, Seq: %d)",
status, bs, stmin, ack, sn);
} else {
col_append_fstr(pinfo->cinfo, COL_INFO, "(Status: %d, Block size: 0x%x, Separation time minimum: %d ms)",
status, bs, stmin);
}
break;
}
/* And now the AUTOSAR FlexRay TP Types... */
case ISO15765_MESSAGE_TYPES_FR_SINGLE_FRAME_EXT: {
offset = ae + ISO15765_PCI_FD_SF_LEN;
data_length = tvb_get_guint8(tvb, ae + 1);
proto_tree_add_item(iso15765_tree, hf_iso15765_data_length, tvb, ae + 1, 1, ENC_BIG_ENDIAN);
next_tvb = tvb_new_subset_length_caplen(tvb, offset, data_length, data_length);
complete = TRUE;
/* Show some info */
col_append_fstr(pinfo->cinfo, COL_INFO, "(Len: %d)", data_length);
break;
}
case ISO15765_MESSAGE_TYPES_FR_FIRST_FRAME_EXT: {
full_len = tvb_get_guint32(tvb, ae + 1, ENC_BIG_ENDIAN);
proto_tree_add_item(iso15765_tree, hf_iso15765_frame_length, tvb, ae + 1, 4, ENC_BIG_ENDIAN);
offset = ae + 1 + 4;
data_length = tvb_reported_length(tvb) - offset;
if (bus_type == ISO15765_TYPE_FLEXRAY && flexray_segment_size_limit != 0
&& (guint32)data_length > flexray_segment_size_limit - (offset - ae)) {
data_length = flexray_segment_size_limit - (offset - ae);
}
fragmented = TRUE;
frag_id_low = 0;
/* Save information */
if (!(pinfo->fd->visited)) {
iso15765_frame_t *iso15765_frame = wmem_new0(wmem_file_scope(), iso15765_frame_t);
iso15765_frame->seq = iso15765_info->seq = ++msg_seqid;
iso15765_frame->len = full_len;
wmem_map_insert(iso15765_frame_table, GUINT_TO_POINTER(iso15765_info->seq), iso15765_frame);
}
/* Show some info */
col_append_fstr(pinfo->cinfo, COL_INFO, "(Frame Len: %d)", full_len);
break;
}
default:
expert_add_info_format(pinfo, message_type_item, &ei_iso15765_message_type_bad,
"Bad Message Type value %u <= 7", message_type);
return ae;
}
/* Show data */
if (data_length > 0) {
col_append_fstr(pinfo->cinfo, COL_INFO, " %s",
tvb_bytes_to_str_punct(pinfo->pool, tvb, offset, data_length, ' '));
}
if (fragmented) {
tvbuff_t *new_tvb = NULL;
iso15765_frame_t *iso15765_frame;
guint16 frag_id = frag_id_low;
/* Get frame information */
iso15765_frame = (iso15765_frame_t *)wmem_map_lookup(iso15765_frame_table,
GUINT_TO_POINTER(iso15765_info->seq));
if (iso15765_frame != NULL) {
if (!(pinfo->fd->visited)) {
frag_id += ((iso15765_frame->frag_id_high[frag_id]++) * 16);
/* Save the frag_id for subsequent dissection */
iso15765_info->frag_id = frag_id;
/* Check if there is an error in conversation */
if (iso15765_info->frag_id + window < iso15765_frame->last_frag_id) {
/* Error in conversation */
iso15765_frame->error = TRUE;
}
}
if (!iso15765_frame->error) {
gboolean save_fragmented = pinfo->fragmented;
guint32 len = data_length;
fragment_head *frag_msg;
/* Check if it's the last packet */
if (!(pinfo->fd->visited)) {
/* Update the last_frag_id */
if (frag_id > iso15765_frame->last_frag_id) {
iso15765_frame->last_frag_id = frag_id;
}
iso15765_frame->offset += len;
if (iso15765_frame->offset >= iso15765_frame->len) {
iso15765_info->last = TRUE;
iso15765_frame->complete = TRUE;
len -= (iso15765_frame->offset - iso15765_frame->len);
}
}
pinfo->fragmented = TRUE;
/* Add fragment to fragment table */
frag_msg = fragment_add_seq_check(&iso15765_reassembly_table, tvb, offset, pinfo, iso15765_info->seq, NULL,
iso15765_info->frag_id, len, !iso15765_info->last);
new_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled Message", frag_msg,
&iso15765_frag_items, NULL, iso15765_tree);
if (frag_msg && frag_msg->reassembled_in != pinfo->num) {
col_append_frame_number(pinfo, COL_INFO, " [Reassembled in #%u]",
frag_msg->reassembled_in);
}
pinfo->fragmented = save_fragmented;
}
if (new_tvb) {
/* This is a complete TVB to dissect */
next_tvb = new_tvb;
complete = TRUE;
} else {
next_tvb = tvb_new_subset_length_caplen(tvb, offset, data_length, data_length);
}
}
}
if (next_tvb) {
iso15765data.len = frame_length;
if (!complete || !dissector_try_payload_new(subdissector_table, next_tvb, pinfo, tree, TRUE, &iso15765data)) {
call_data_dissector(next_tvb, pinfo, tree);
}
}
return tvb_captured_length(tvb);
}
static int
dissect_iso15765_can(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
struct can_info can_info;
DISSECTOR_ASSERT(data);
can_info = *((struct can_info*)data);
if (can_info.id & (CAN_ERR_FLAG | CAN_RTR_FLAG)) {
/* Error and RTR frames are not for us. */
return 0;
}
if (can_info.fd) {
return dissect_iso15765(tvb, pinfo, tree, ISO15765_TYPE_CAN_FD, can_info.id, can_info.len);
} else {
return dissect_iso15765(tvb, pinfo, tree, ISO15765_TYPE_CAN, can_info.id, can_info.len);
}
}
static int
dissect_iso15765_lin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
DISSECTOR_ASSERT(data);
lin_info_t *lininfo = (lin_info_t *)data;
return dissect_iso15765(tvb, pinfo, tree, ISO15765_TYPE_LIN, lininfo->id, lininfo->len);
}
static int
dissect_iso15765_flexray(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
DISSECTOR_ASSERT(data);
flexray_info_t *flexray_id = (flexray_info_t *)data;
guint32 id = (((guint32)flexray_id->id) << 16) | (((guint32)flexray_id->cc) << 8) | flexray_id->ch;
return dissect_iso15765(tvb, pinfo, tree, ISO15765_TYPE_FLEXRAY, id, tvb_captured_length(tvb));
}
static int
dissect_iso15765_ipdum(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
DISSECTOR_ASSERT(data);
autosar_ipdu_multiplexer_info_t *ipdum_data = (autosar_ipdu_multiplexer_info_t *)data;
return dissect_iso15765(tvb, pinfo, tree, ISO15765_TYPE_IPDUM, ipdum_data->pdu_id, tvb_captured_length(tvb));
}
static void
update_config(void)
{
if (iso15765_handle_lin != NULL) {
dissector_delete_all("lin.frame_id", iso15765_handle_lin);
if (register_lin_diag_frames) {
/* LIN specification states that 0x3c and 0x3d are for diagnostics */
dissector_add_uint("lin.frame_id", LIN_DIAG_MASTER_REQUEST_FRAME, iso15765_handle_lin);
dissector_add_uint("lin.frame_id", LIN_DIAG_SLAVE_RESPONSE_FRAME, iso15765_handle_lin);
}
}
if (iso15765_handle_can != NULL) {
dissector_delete_all("can.id", iso15765_handle_can);
dissector_delete_all("can.extended_id", iso15765_handle_can);
dissector_add_uint_range("can.id", configured_can_ids, iso15765_handle_can);
dissector_add_uint_range("can.extended_id", configured_ext_can_ids, iso15765_handle_can);
}
if (iso15765_handle_ipdum != NULL) {
dissector_delete_all("ipdum.pdu.id", iso15765_handle_ipdum);
dissector_add_uint_range("ipdum.pdu.id", configured_ipdum_pdu_ids, iso15765_handle_ipdum);
}
}
void
proto_register_iso15765(void)
{
uat_t *config_can_addr_mapping_uat;
static hf_register_info hf[] = {
{
&hf_iso15765_address,
{
"Address", "iso15765.address",
FT_UINT8, BASE_HEX,
NULL, 0,
NULL, HFILL
}
},
{
&hf_iso15765_target_address,
{
"FlexRay Target Address", "iso15765.flexray_target_address",
FT_UINT16, BASE_HEX,
NULL, 0,
NULL, HFILL
}
},
{
&hf_iso15765_source_address,
{
"FlexRay Source Address", "iso15765.flexray_source_address",
FT_UINT16, BASE_HEX,
NULL, 0,
NULL, HFILL
}
},
{
&hf_iso15765_message_type,
{
"Message Type", "iso15765.message_type",
FT_UINT8, BASE_HEX,
VALS(iso15765_message_types), ISO15765_MESSAGE_TYPE_MASK,
NULL, HFILL
}
},
{
&hf_iso15765_data_length,
{
"Data length", "iso15765.data_length",
FT_UINT32, BASE_DEC,
NULL, 0,
NULL, HFILL
}
},
{
&hf_iso15765_frame_length,
{
"Frame length", "iso15765.frame_length",
FT_UINT32, BASE_DEC,
NULL, 0x0,
NULL, HFILL
}
},
{
&hf_iso15765_sequence_number,
{
"Sequence number", "iso15765.sequence_number",
FT_UINT8, BASE_HEX,
NULL, ISO15765_MESSAGE_SEQUENCE_NUMBER_MASK,
NULL, HFILL
}
},
{
&hf_iso15765_flow_status,
{
"Flow status", "iso15765.flow_status",
FT_UINT8, BASE_HEX,
VALS(iso15765_flow_status_types), ISO15765_MESSAGE_FLOW_STATUS_MASK,
NULL, HFILL
}
},
{
&hf_iso15765_fc_bs,
{
"Block size", "iso15765.flow_control.bs",
FT_UINT8, BASE_HEX,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_fc_stmin,
{
"Separation time minimum (ms)", "iso15765.flow_control.stmin",
FT_UINT8, BASE_DEC,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_autosar_ack,
{
"Acknowledgement", "iso15765.autosar_ack.ack",
FT_UINT8, BASE_HEX,
NULL, ISO15765_MESSAGE_AUTOSAR_ACK_MASK,
NULL, HFILL
}
},
{
&hf_iso15765_fragments,
{
"Message fragments", "iso15765.fragments",
FT_NONE, BASE_NONE,
NULL, 0x00,
NULL, HFILL
},
},
{
&hf_iso15765_fragment,
{
"Message fragment", "iso15765.fragment",
FT_FRAMENUM, BASE_NONE,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_fragment_overlap,
{
"Message fragment overlap", "iso15765.fragment.overlap",
FT_BOOLEAN, 0,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_fragment_overlap_conflicts,
{
"Message fragment overlapping with conflicting data", "iso15765.fragment.overlap.conflicts",
FT_BOOLEAN, 0,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_fragment_multiple_tails,
{
"Message has multiple tail fragments", "iso15765.fragment.multiple_tails",
FT_BOOLEAN, 0,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_fragment_too_long_fragment,
{
"Message fragment too long", "iso15765.fragment.too_long_fragment",
FT_BOOLEAN, 0, NULL,
0x00, NULL, HFILL
}
},
{
&hf_iso15765_fragment_error,
{
"Message defragmentation error", "iso15765.fragment.error",
FT_FRAMENUM, BASE_NONE,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_fragment_count,
{
"Message fragment count", "iso15765.fragment.count",
FT_UINT32, BASE_DEC,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_reassembled_in,
{
"Reassembled in", "iso15765.reassembled.in",
FT_FRAMENUM, BASE_NONE,
NULL, 0x00,
NULL, HFILL
}
},
{
&hf_iso15765_reassembled_length,
{
"Reassembled length", "iso15765.reassembled.length",
FT_UINT32, BASE_DEC,
NULL, 0x00,
NULL, HFILL
}
},
};
/* Setup protocol subtree array */
static gint *ett[] =
{
&ett_iso15765,
&ett_iso15765_fragment,
&ett_iso15765_fragments,
};
static ei_register_info ei[] = {
{
&ei_iso15765_message_type_bad,
{
"iso15765.message_type.bad", PI_MALFORMED,
PI_ERROR, "Bad Message Type value", EXPFILL
}
},
};
module_t *iso15765_module;
expert_module_t* expert_iso15765;
proto_iso15765 = proto_register_protocol (
"ISO15765 Protocol", /* name */
"ISO 15765", /* short name */
"iso15765" /* abbrev */
);
register_dissector("iso15765", dissect_iso15765_lin, proto_iso15765);
expert_iso15765 = expert_register_protocol(proto_iso15765);
proto_register_field_array(proto_iso15765, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_register_field_array(expert_iso15765, ei, array_length(ei));
iso15765_module = prefs_register_protocol(proto_iso15765, update_config);
prefs_register_enum_preference(iso15765_module, "addressing",
"Addressing",
"Addressing of ISO 15765. Normal or Extended",
&addressing,
enum_addressing, TRUE);
prefs_register_uint_preference(iso15765_module, "window",
"Window",
"Window of ISO 15765 fragments",
10, &window);
prefs_register_static_text_preference(iso15765_module, "empty1", "", NULL);
prefs_register_static_text_preference(iso15765_module, "header1", "Protocol Handling:", NULL);
range_convert_str(wmem_epan_scope(), &configured_can_ids, "", 0x7ff);
prefs_register_range_preference(iso15765_module, "can.ids",
"CAN IDs (standard)",
"ISO15765 bound standard CAN IDs",
&configured_can_ids, 0x7ff);
range_convert_str(wmem_epan_scope(), &configured_ext_can_ids, "", 0x1fffffff);
prefs_register_range_preference(iso15765_module, "can.extended_ids",
"CAN IDs (extended)",
"ISO15765 bound extended CAN IDs",
&configured_ext_can_ids, 0x1fffffff);
/* UATs for config_can_addr_mapping_uat */
static uat_field_t config_can_addr_mapping_uat_fields[] = {
UAT_FLD_BOOL(config_can_addr_mappings, extended_address, "Ext. Addr.", "Extended Addressing (TRUE), Standard Addressing (FALSE)"),
UAT_FLD_HEX(config_can_addr_mappings, can_id, "CAN ID", "CAN ID (hex)"),
UAT_FLD_HEX(config_can_addr_mappings, can_id_mask, "CAN ID Mask", "CAN ID Mask (hex)"),
UAT_FLD_HEX(config_can_addr_mappings, source_addr_mask, "Source Addr Mask", "Bitmask to specify location of Source Address (hex)"),
UAT_FLD_HEX(config_can_addr_mappings, target_addr_mask, "Target Addr Mask", "Bitmask to specify location of Target Address (hex)"),
UAT_FLD_HEX(config_can_addr_mappings, ecu_addr_mask, "ECU Addr Mask", "Bitmask to specify location of ECU Address (hex)"),
UAT_END_FIELDS
};
config_can_addr_mapping_uat = uat_new("ISO15765 CAN ID Mapping",
sizeof(config_can_addr_mapping_t), /* record size */
DATAFILE_CAN_ADDR_MAPPING, /* filename */
TRUE, /* from profile */
(void**)&config_can_addr_mappings, /* data_ptr */
&config_can_addr_mappings_num, /* numitems_ptr */
UAT_AFFECTS_DISSECTION, /* but not fields */
NULL, /* help */
copy_config_can_addr_mapping_cb, /* copy callback */
update_config_can_addr_mappings, /* update callback */
free_config_can_addr_mappings, /* free callback */
post_update_config_can_addr_mappings_cb, /* post update callback */
NULL, /* reset callback */
config_can_addr_mapping_uat_fields /* UAT field definitions */
);
prefs_register_uat_preference(iso15765_module, "_iso15765_can_id_mappings", "CAN ID Mappings",
"A table to define mappings rules for CAN IDs", config_can_addr_mapping_uat);
prefs_register_bool_preference(iso15765_module, "lin_diag",
"Handle LIN Diagnostic Frames",
"Handle LIN Diagnostic Frames",
&register_lin_diag_frames);
prefs_register_enum_preference(iso15765_module, "flexray_addressing",
"FlexRay Addressing",
"Addressing of FlexRay TP. 1 Byte or 2 Byte",
&flexray_addressing,
enum_flexray_addressing, TRUE);
prefs_register_uint_preference(iso15765_module, "flexray_segment_size_limit",
"FlexRay Segment Cutoff",
"Segment Size Limit for first and consecutive frames of FlexRay (bytes after addresses)",
10, &flexray_segment_size_limit);
range_convert_str(wmem_epan_scope(), &configured_ipdum_pdu_ids, "", 0xffffffff);
prefs_register_range_preference(iso15765_module, "ipdum.pdu.id",
"I-PduM PDU-IDs",
"I-PduM PDU-IDs",
&configured_ipdum_pdu_ids, 0xffffffff);
prefs_register_enum_preference(iso15765_module, "ipdum_addressing",
"I-PduM Addressing",
"Addressing of I-PduM TP. 0, 1, or 2 Bytes",
&ipdum_addressing,
enum_ipdum_addressing, TRUE);
iso15765_frame_table = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), g_direct_hash, g_direct_equal);
reassembly_table_register(&iso15765_reassembly_table, &addresses_reassembly_table_functions);
subdissector_table = register_decode_as_next_proto(proto_iso15765, "iso15765.subdissector", "ISO15765 next level dissector", NULL);
}
void
proto_reg_handoff_iso15765(void)
{
iso15765_handle_can = create_dissector_handle(dissect_iso15765_can, proto_iso15765);
iso15765_handle_lin = create_dissector_handle(dissect_iso15765_lin, proto_iso15765);
iso15765_handle_flexray = create_dissector_handle(dissect_iso15765_flexray, proto_iso15765);
iso15765_handle_ipdum = create_dissector_handle(dissect_iso15765_ipdum, proto_iso15765);
dissector_add_for_decode_as("can.subdissector", iso15765_handle_can);
dissector_add_for_decode_as("flexray.subdissector", iso15765_handle_flexray);
update_config();
}
/*
* 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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