9011ad1030
Only CAN protocol is supported. Extra information available in J1939 entries is ignored since the J1939 wireshark dissector works with raw CAN frames and makes no use of this extra information. The log format may also encapsulate LIN messages which are not supported by wireshark and thus are ignored. The only limitation is that relative timestamp format is not supported. If a file defines relative format of timestamps, packets are extracted, but timestamps are omitted, since random access deems impossible without reparsing the whole file up to the packet of interest. In order to support relative timestamps we need to parse the whole file at once on open and either dump into a temporary PCAP file or keep messages in a private list and provide access to them on read()/seek_read(). The change also creates a separate header for CAN frame structure definitions which are used by several file readers (candump and busmaster for now). Bug: 15939 Change-Id: I87c5555e4e5e1b142b9984b24544b2591d494fbc Reviewed-on: https://code.wireshark.org/review/34083 Petri-Dish: Anders Broman <a.broman58@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/* socketcan.h
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*
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* Wiretap Library
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* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
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*
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* Support for Busmaster log file format
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* Copyright (c) 2019 by Maksim Salau <maksim.salau@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef SOCKETCAN_H__
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#define SOCKETCAN_H__
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#include <gmodule.h>
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#define CAN_MAX_DLEN 8
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#define CANFD_MAX_DLEN 64
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typedef struct can_frame {
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guint32 can_id; /* 32 bit CAN_ID + EFF/RTR/ERR flags */
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guint8 can_dlc; /* frame payload length in byte (0 .. CAN_MAX_DLEN) */
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guint8 __pad; /* padding */
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guint8 __res0; /* reserved / padding */
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guint8 __res1; /* reserved / padding */
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guint8 data[CAN_MAX_DLEN];
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} can_frame_t;
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typedef struct canfd_frame {
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guint32 can_id; /* 32 bit CAN_ID + EFF flag */
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guint8 len; /* frame payload length in byte */
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guint8 flags; /* additional flags for CAN FD */
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guint8 __res0; /* reserved / padding */
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guint8 __res1; /* reserved / padding */
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guint8 data[CANFD_MAX_DLEN];
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} canfd_frame_t;
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#endif /* SOCKETCAN_H__ */
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