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wireshark/epan/dissectors/packet-iso10681.c

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/* packet-iso10681.c
* ISO 10681-2 ISO FlexRay TP
* By Dr. Lars Voelker <lars.voelker@technica-engineering.de>
* Copyright 2021-2021 Dr. Lars Voelker
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Also see packet-iso15765.c / packet-iso15765.h
*/
#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 "packet-iso10681.h"
#include "packet-flexray.h"
void proto_register_iso10681(void);
void proto_reg_handoff_iso10681(void);
/* StartFrame or StartFrameAck */
#define ISO10681_TYPE_MASK 0xF0
#define ISO10681_TYPE_START_FRAME 4
#define ISO10681_TYPE_CONSECUTIVE_FRAME_1 5
#define ISO10681_TYPE_CONSECUTIVE_FRAME_2 6
#define ISO10681_TYPE_CONSECUTIVE_FRAME_EOB 7
#define ISO10681_TYPE_FLOW_CONTROL 8
#define ISO10681_TYPE_LAST_FRAME 9
#define ISO10681_TYPE_PART2_MASK 0x0F
#define ISO10681_FLOW_STATUS_CTS 3
#define ISO10681_FLOW_STATUS_ACK_RETRY 4
#define ISO10681_FLOW_STATUS_WAIT 5
#define ISO10681_FLOW_STATUS_ABORT 6
#define ISO10681_FLOW_STATUS_OVERFLOW 7
typedef struct iso10681_identifier {
guint32 id;
guint32 seq;
guint16 frag_id;
gboolean last;
} iso10681_identifier_t;
typedef struct iso10681_frame {
guint32 seq;
guint32 offset;
guint32 len;
gboolean error;
gboolean complete;
guint16 last_frag_id;
guint8 frag_id_high[16];
} iso10681_frame_t;
static const value_string iso10681_message_types[] = {
{ISO10681_TYPE_START_FRAME, "Start Frame"},
{ISO10681_TYPE_CONSECUTIVE_FRAME_1, "Consecutive Frame 1"},
{ISO10681_TYPE_CONSECUTIVE_FRAME_2, "Consecutive Frame 2"},
{ISO10681_TYPE_CONSECUTIVE_FRAME_EOB, "Consecutive Frame EOB"},
{ISO10681_TYPE_FLOW_CONTROL, "Flow Control"},
{ISO10681_TYPE_LAST_FRAME, "Last Frame"},
{0, NULL}
};
static const value_string iso10681_flow_status_values[] = {
{ISO10681_FLOW_STATUS_CTS, "Continue to Send"},
{ISO10681_FLOW_STATUS_ACK_RETRY, "Ack/Retry"},
{ISO10681_FLOW_STATUS_WAIT, "Wait"},
{ISO10681_FLOW_STATUS_ABORT, "Abort"},
{ISO10681_FLOW_STATUS_OVERFLOW, "Overflow"},
{0, NULL}
};
static const value_string iso10681_start_type2_values[] = {
{0, "Unacknowledged"},
{1, "Acknowledged"},
{0, NULL}
};
static const value_string iso10681_fc_bc_scexp_values[] = {
{0, "0 cycles"},
{1, "1 cycle"},
{2, "3 cycles"},
{3, "7 cycles"},
{4, "15 cycles"},
{5, "31 cycles"},
{6, "63 cycles"},
{7, "127 cycles"},
{0, NULL}
};
static const value_string iso10681_fc_ack_values[] = {
{0, "Acknowledge"},
{1, "Retry Request"},
{0, NULL}
};
static int hf_iso10681_target_address = -1;
static int hf_iso10681_source_address = -1;
static int hf_iso10681_type = -1;
static int hf_iso10681_type2 = -1;
static int hf_iso10681_frame_payload_length = -1;
static int hf_iso10681_message_length = -1;
static int hf_iso10681_sequence_number = -1;
static int hf_iso10681_fc_flow_status = -1;
static int hf_iso10681_fc_bandwidth_control = -1;
static int hf_iso10681_fc_bc_separation_cycle_exp = -1;
static int hf_iso10681_fc_bc_max_num_pdu_per_cycle = -1;
static int hf_iso10681_fc_buffer_size = -1;
static int hf_iso10681_fc_ack = -1;
static int hf_iso10681_fc_byte_position = -1;
static gint ett_iso10681 = -1;
static gint ett_iso10681_bandwidth_control = -1;
static expert_field ei_iso10681_message_type_bad = EI_INIT;
static int proto_iso10681 = -1;
static dissector_handle_t iso10681_handle_flexray = NULL;
static dissector_table_t subdissector_table;
static range_t *iso10681_flexray_ids = NULL;
static gboolean iso10681_spread_over_multiple_cycles = TRUE;
static reassembly_table iso10681_reassembly_table;
static wmem_map_t *iso10681_frame_table = NULL;
static wmem_map_t *iso10681_seq_table = NULL;
static guint32 next_seqnum = 0;
static int hf_iso10681_fragments = -1;
static int hf_iso10681_fragment = -1;
static int hf_iso10681_fragment_overlap = -1;
static int hf_iso10681_fragment_overlap_conflicts = -1;
static int hf_iso10681_fragment_multiple_tails = -1;
static int hf_iso10681_fragment_too_long_fragment = -1;
static int hf_iso10681_fragment_error = -1;
static int hf_iso10681_fragment_count = -1;
static int hf_iso10681_reassembled_in = -1;
static int hf_iso10681_reassembled_length = -1;
static gint ett_iso10681_fragment = -1;
static gint ett_iso10681_fragments = -1;
static const fragment_items iso10681_frag_items = {
/* Fragment subtrees */
&ett_iso10681_fragment,
&ett_iso10681_fragments,
/* Fragment fields */
&hf_iso10681_fragments,
&hf_iso10681_fragment,
&hf_iso10681_fragment_overlap,
&hf_iso10681_fragment_overlap_conflicts,
&hf_iso10681_fragment_multiple_tails,
&hf_iso10681_fragment_too_long_fragment,
&hf_iso10681_fragment_error,
&hf_iso10681_fragment_count,
/* Reassembled in field */
&hf_iso10681_reassembled_in,
/* Reassembled length field */
&hf_iso10681_reassembled_length,
/* Reassembled data field */
NULL,
"ISO10681 fragments"
};
static guint32
iso10681_seqnum(guint32 frame_id, gboolean new_seqnum) {
guint32 *ret;
ret = (guint32 *)wmem_map_lookup(iso10681_seq_table, GUINT_TO_POINTER(frame_id));
if (ret == NULL) {
ret = wmem_new0(wmem_file_scope(), guint32);
*ret = next_seqnum++;
wmem_map_insert(iso10681_seq_table, GUINT_TO_POINTER(frame_id), ret);
} else {
if (new_seqnum) {
(*ret) = next_seqnum++;
}
}
return *ret;
}
static int
dissect_iso10681(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 frame_id, guint32 frame_length _U_) {
proto_tree *iso10681_tree;
proto_item *ti;
proto_item *ti_type;
guint32 type;
guint32 offset;
iso10681_identifier_t* iso10681_info;
gboolean fragmented = FALSE;
guint32 seqnum = 0;
guint32 data_length = 0;
guint32 full_len = 0;
guint32 target_addr = 0;
guint32 source_addr = 0;
tvbuff_t* next_tvb = NULL;
gboolean complete = FALSE;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISO10681");
col_clear(pinfo->cinfo, COL_INFO);
iso10681_info = (iso10681_identifier_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_iso10681, 0);
if (!iso10681_info) {
iso10681_info = wmem_new0(wmem_file_scope(), iso10681_identifier_t);
iso10681_info->id = frame_id;
iso10681_info->last = FALSE;
p_add_proto_data(wmem_file_scope(), pinfo, proto_iso10681, 0, iso10681_info);
}
ti = proto_tree_add_item(tree, proto_iso10681, tvb, 0, -1, ENC_NA);
iso10681_tree = proto_item_add_subtree(ti, ett_iso10681);
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_target_address, tvb, 0, 2, ENC_BIG_ENDIAN, &target_addr);
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_source_address, tvb, 2, 2, ENC_BIG_ENDIAN, &source_addr);
offset = 4;
ti_type = proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_type, tvb, offset, 1, ENC_BIG_ENDIAN, &type);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(type, iso10681_message_types, "Unknown (0x%02x)"));
switch (type) {
case ISO10681_TYPE_START_FRAME: {
guint32 type2_value;
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_type2, tvb, offset, 1, ENC_BIG_ENDIAN, &type2_value);
col_append_fstr(pinfo->cinfo, COL_INFO, " %s", val_to_str(type2_value, iso10681_start_type2_values, "Unknown (0x%x)"));
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_frame_payload_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN, &data_length);
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_message_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN, &full_len);
offset += 4;
fragmented = TRUE;
seqnum = 0;
if (!(pinfo->fd->visited)) {
iso10681_frame_t *iso10681_frame = wmem_new0(wmem_file_scope(), iso10681_frame_t);
iso10681_frame->seq = iso10681_info->seq = iso10681_seqnum(frame_id, TRUE);
iso10681_frame->len = full_len;
wmem_map_insert(iso10681_frame_table, GUINT_TO_POINTER(iso10681_info->seq), iso10681_frame);
}
col_append_fstr(pinfo->cinfo, COL_INFO, " (Segment Length: %d, Total Len: %d)", data_length, full_len);
break;
}
case ISO10681_TYPE_CONSECUTIVE_FRAME_1:
case ISO10681_TYPE_CONSECUTIVE_FRAME_2:
case ISO10681_TYPE_CONSECUTIVE_FRAME_EOB: {
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_sequence_number, tvb, offset, 1, ENC_BIG_ENDIAN, &seqnum);
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_frame_payload_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN, &data_length);
offset += 2;
fragmented = TRUE;
if (!(pinfo->fd->visited)) {
iso10681_info->seq = iso10681_seqnum(frame_id, FALSE);
}
col_append_fstr(pinfo->cinfo, COL_INFO, " (Segment Length: %d, Sequence Number: %d)", data_length, seqnum);
break;
}
case ISO10681_TYPE_LAST_FRAME: {
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_frame_payload_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN, &data_length);
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_message_length, tvb, offset + 2, 2, ENC_BIG_ENDIAN, &full_len);
offset += 4;
fragmented = TRUE;
if (!(pinfo->fd->visited)) {
iso10681_info->seq = iso10681_seqnum(frame_id, FALSE);
}
col_append_fstr(pinfo->cinfo, COL_INFO, " (Segment Length: %d, Total Len: %d)", data_length, full_len);
break;
}
case ISO10681_TYPE_FLOW_CONTROL: {
guint flow_status = 0;
proto_tree_add_item_ret_uint(iso10681_tree, hf_iso10681_fc_flow_status, tvb, offset, 1, ENC_BIG_ENDIAN, &flow_status);
switch (flow_status) {
case ISO10681_FLOW_STATUS_CTS: {
static int * const bandwidth_control[] = {
&hf_iso10681_fc_bc_max_num_pdu_per_cycle,
&hf_iso10681_fc_bc_separation_cycle_exp,
NULL
};
proto_tree_add_bitmask(iso10681_tree, tvb, offset + 1, hf_iso10681_fc_bandwidth_control, ett_iso10681_bandwidth_control,
bandwidth_control, ENC_BIG_ENDIAN);
proto_tree_add_item(iso10681_tree, hf_iso10681_fc_buffer_size, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
break;
}
case ISO10681_FLOW_STATUS_ACK_RETRY:
proto_tree_add_item(iso10681_tree, hf_iso10681_fc_ack, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(iso10681_tree, hf_iso10681_fc_byte_position, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
break;
}
col_append_fstr(pinfo->cinfo, COL_INFO, " (Flow Status: %s)", val_to_str(flow_status, iso10681_flow_status_values, "unknown (0x%x)"));
break;
}
default:
expert_add_info_format(pinfo, ti_type, &ei_iso10681_message_type_bad, "Bad Message Type value %u", type);
return offset;
}
/* 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;
iso10681_frame_t *iso10681_frame;
guint16 frag_id = seqnum;
/* Get frame information */
iso10681_frame = (iso10681_frame_t *)wmem_map_lookup(iso10681_frame_table, GUINT_TO_POINTER(iso10681_info->seq));
if (iso10681_frame != NULL) {
if (type == ISO10681_TYPE_LAST_FRAME) {
frag_id = iso10681_frame->last_frag_id + 1;
}
if (!(pinfo->fd->visited)) {
frag_id += ((iso10681_frame->frag_id_high[frag_id]++) * 16);
/* Save the frag_id for subsequent dissection */
iso10681_info->frag_id = frag_id;
}
if (!iso10681_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 > iso10681_frame->last_frag_id) {
iso10681_frame->last_frag_id = frag_id;
}
iso10681_frame->offset += len;
if (iso10681_frame->offset >= iso10681_frame->len) {
iso10681_info->last = TRUE;
iso10681_frame->complete = TRUE;
len -= (iso10681_frame->offset - iso10681_frame->len);
}
}
pinfo->fragmented = TRUE;
/* Add fragment to fragment table */
frag_msg = fragment_add_seq_check(&iso10681_reassembly_table, tvb, offset, pinfo, iso10681_info->seq, NULL,
iso10681_info->frag_id, len, !iso10681_info->last);
new_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled Message", frag_msg, &iso10681_frag_items, NULL,
iso10681_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) {
iso10681_info_t iso10681data;
iso10681data.id = frame_id;
iso10681data.len = frame_length;
iso10681data.target_address = target_addr;
iso10681data.source_address = source_addr;
if (!complete || !dissector_try_payload_new(subdissector_table, next_tvb, pinfo, tree, TRUE, &iso10681data)) {
call_data_dissector(next_tvb, pinfo, tree);
}
}
return tvb_captured_length(tvb);
}
static int
dissect_iso10681_flexray(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) {
DISSECTOR_ASSERT(data);
flexray_info_t *flexray_info = (flexray_info_t *)data;
guint32 id = flexray_flexrayinfo_to_flexrayid(flexray_info);
if (iso10681_spread_over_multiple_cycles) {
/* masking out the cycle */
id |= FLEXRAY_ID_CYCLE_MASK;
}
return dissect_iso10681(tvb, pinfo, tree, id, tvb_captured_length(tvb));
}
void
proto_register_iso10681(void) {
module_t *iso10681_module;
static hf_register_info hf[] = {
{ &hf_iso10681_source_address, {
"Source Address", "iso10681.source_address",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } },
{ &hf_iso10681_target_address, {
"Target Address", "iso10681.target_address",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } },
{ &hf_iso10681_type, {
"Type", "iso10681.type",
FT_UINT8, BASE_HEX, VALS(iso10681_message_types), ISO10681_TYPE_MASK, NULL, HFILL } },
{ &hf_iso10681_type2, {
"Type Ack", "iso10681.type_ack",
FT_UINT8, BASE_HEX, VALS(iso10681_start_type2_values), ISO10681_TYPE_PART2_MASK, NULL, HFILL } },
{ &hf_iso10681_frame_payload_length, {
"Frame Payload Length", "iso10681.frame_payload_length",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_iso10681_message_length, {
"Message Length", "iso10681.message_length",
FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_iso10681_sequence_number, {
"Sequence Number", "iso10681.sequence_number",
FT_UINT8, BASE_DEC, NULL, ISO10681_TYPE_PART2_MASK, NULL, HFILL } },
{ &hf_iso10681_fc_flow_status, {
"Flow Status", "iso10681.flow_status",
FT_UINT8, BASE_DEC, VALS(iso10681_flow_status_values), ISO10681_TYPE_PART2_MASK, NULL, HFILL } },
{ &hf_iso10681_fc_bandwidth_control, {
"Bandwidth Control", "iso10681.bandwidth_control",
FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_iso10681_fc_bc_separation_cycle_exp, {
"Separation Cycle Exp", "iso10681.bandwidth_control.separation_cycle_exp",
FT_UINT8, BASE_DEC, VALS(iso10681_fc_bc_scexp_values), 0x07, NULL, HFILL } },
{ &hf_iso10681_fc_bc_max_num_pdu_per_cycle, {
"Max Number of PDUs per Cycle", "iso10681.bandwidth_control.max_number_pdus_per_cycle",
FT_UINT8, BASE_DEC, NULL, 0xF8, NULL, HFILL } },
{ &hf_iso10681_fc_buffer_size, {
"Buffer Size", "iso10681.buffer_size",
FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL } },
{ &hf_iso10681_fc_ack, {
"Ack", "iso10681.ack",
FT_UINT8, BASE_HEX, VALS(iso10681_fc_ack_values), 0, NULL, HFILL } },
{ &hf_iso10681_fc_byte_position, {
"Byte Position", "iso10681.byte_position",
FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL } },
{ &hf_iso10681_fragments, {
"Message fragments", "iso10681.fragments",
FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_fragment, {
"Message fragment", "iso10681.fragment",
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_fragment_overlap, {
"Message fragment overlap", "iso10681.fragment.overlap",
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_fragment_overlap_conflicts, {
"Message fragment overlapping with conflicting data", "iso10681.fragment.overlap.conflicts",
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_fragment_multiple_tails, {
"Message has multiple tail fragments", "iso10681.fragment.multiple_tails",
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_fragment_too_long_fragment, {
"Message fragment too long", "iso10681.fragment.too_long_fragment",
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_fragment_error, {
"Message defragmentation error", "iso10681.fragment.error",
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_fragment_count, {
"Message fragment count", "iso10681.fragment.count",
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_reassembled_in, {
"Reassembled in", "iso10681.reassembled.in",
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
{ &hf_iso10681_reassembled_length, {
"Reassembled length", "iso10681.reassembled.length",
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } },
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_iso10681,
&ett_iso10681_bandwidth_control,
&ett_iso10681_fragment,
&ett_iso10681_fragments,
};
static ei_register_info ei[] = {
{
&ei_iso10681_message_type_bad, { "iso10681.message_type.bad", PI_MALFORMED, PI_ERROR, "Bad Message Type value", EXPFILL }
},
};
expert_module_t* expert_iso10681;
proto_iso10681 = proto_register_protocol (
"ISO10681 Protocol", /* name */
"ISO 10681", /* short name */
"iso10681" /* abbrev */
);
/* Register configuration options */
iso10681_module = prefs_register_protocol(proto_iso10681, proto_reg_handoff_iso10681);
prefs_register_range_preference(iso10681_module, "flexray.flexrayids", "FlexRay IDs",
"FlexRay IDs (combined) - 4bit Bus-ID (0 any), 4bit Channel, 16bit Frame-ID, 8bit Cycle (0xff any)",
&iso10681_flexray_ids, 0xffffffff);
prefs_register_bool_preference(iso10681_module, "spread_over_cycles", "Ignore Cycle when matching",
"TP frames are spread over multiple cycles. Cycle is ignored for matching.",
&iso10681_spread_over_multiple_cycles);
proto_register_field_array(proto_iso10681, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_iso10681 = expert_register_protocol(proto_iso10681);
expert_register_field_array(expert_iso10681, ei, array_length(ei));
iso10681_seq_table = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), g_direct_hash, g_direct_equal);
iso10681_frame_table = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), g_direct_hash, g_direct_equal);
reassembly_table_register(&iso10681_reassembly_table, &addresses_reassembly_table_functions);
subdissector_table = register_decode_as_next_proto(proto_iso10681, "iso10681.subdissector", "ISO10681 next level dissector", NULL);
}
void
proto_reg_handoff_iso10681(void) {
static gboolean initialized = FALSE;
if (!initialized) {
iso10681_handle_flexray = create_dissector_handle(dissect_iso10681_flexray, proto_iso10681);
dissector_add_for_decode_as("flexray.subdissector", iso10681_handle_flexray);
initialized = TRUE;
} else {
dissector_delete_all("flexray.combined_id", iso10681_handle_flexray);
}
dissector_add_uint_range("flexray.combined_id", iso10681_flexray_ids, iso10681_handle_flexray);
}
/*
* 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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