forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
The preferences are still supported for backwards compatibility, but the heuristic_protos file has final say on the "preference" to enable/disable a heuristic dissector. Also add parameter to heur_dissector_add() for the "default" enable/disable of a heuristic dissector. With this parameter, a few more (presumably weak) heuristic dissectors have been "registered" but of course default to being disabled. Change-Id: I51bebb2146ef3fbb8418d4f5c7f2cb2b58003a22 Reviewed-on: https://code.wireshark.org/review/9610 Petri-Dish: Michael Mann <mmann78@netscape.net> Reviewed-by: Roland Knall <rknall@gmail.com> Reviewed-by: Hadriel Kaplan <hadrielk@yahoo.com> Reviewed-by: Michael Mann <mmann78@netscape.net>
2858 lines
137 KiB
C
2858 lines
137 KiB
C
/* packet-opensafety.c
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*
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* openSAFETY is a machine-safety protocol, encapsulated in modern fieldbus
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* and industrial ethernet solutions.
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*
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* For more information see http://www.open-safety.org
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*
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* This dissector currently supports the following transport protocols
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*
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* - openSAFETY using POWERLINK
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* - openSAFETY using SercosIII
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* - openSAFETY using Generic UDP
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* - openSAFETY using Modbus/TCP
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* - openSAFETY using (openSAFETY over UDP) transport
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* - openSAFETY using ProfiNet IO
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*
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* By Roland Knall <roland.knall@br-automation.com>
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* Copyright 2011-2012 Bernecker + Rainer Industrie-Elektronik Ges.m.b.H.
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/etypes.h>
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#include <epan/expert.h>
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#include <epan/reassemble.h>
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#include <epan/strutil.h>
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#include <epan/tap.h>
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#include <wsutil/crc8.h>
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#include <wsutil/crc16.h>
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#include "packet-frame.h"
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#include "packet-opensafety.h"
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/* General definitions */
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/* Used to clasify incoming traffic and presort the heuristic */
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#define OPENSAFETY_CYCLIC_DATA 0x01
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#define OPENSAFETY_ACYCLIC_DATA 0x02
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#ifndef OPENSAFETY_PINFO_CONST_DATA
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#define OPENSAFETY_PINFO_CONST_DATA 0xAABBCCDD
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#endif
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#define OPENSAFETY_REQUEST TRUE
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#define OPENSAFETY_RESPONSE FALSE
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/* SPDO Feature Flags
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* Because featureflags are part of the TR field (which is only 6 bit), the field get's shifted */
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#define OPENSAFETY_SPDO_FEAT_40BIT_AVAIL 0x20
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#define OPENSAFETY_SPDO_FEAT_40BIT_USED 0x10
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#define OPENSAFETY_SPDO_FEATURE_FLAGS (OPENSAFETY_SPDO_FEAT_40BIT_USED | OPENSAFETY_SPDO_FEAT_40BIT_AVAIL)
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#define OSS_FRAME_POS_ADDR 0
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#define OSS_FRAME_POS_ID 1
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#define OSS_FRAME_POS_LEN 2
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#define OSS_FRAME_POS_CT 3
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#define OSS_FRAME_POS_DATA 4
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#define OSS_PAYLOAD_MAXSIZE_FOR_CRC8 0x08
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#define OSS_SLIM_FRAME_WITH_CRC8_MAXSIZE 0x13 /* 19 */
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#define OSS_SLIM_FRAME2_WITH_CRC8 0x06 /* 6 */
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#define OSS_SLIM_FRAME2_WITH_CRC16 0x07 /* 7 */
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#define OSS_MINIMUM_LENGTH 0x0b /* 11 */
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#define OPENSAFETY_SPDO_CONNECTION_VALID 0x04
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#define OPENSAFETY_SOD_DVI 0x1018
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#define OPENSAFETY_SOD_RXMAP 0x1800
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#define OPENSAFETY_SOD_TXMAP 0xC000
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#define OSS_FRAME_ADDR(f, offset) (f[OSS_FRAME_POS_ADDR + offset] + ((guint8)((f[OSS_FRAME_POS_ADDR + offset + 1]) << 6) << 2))
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#define OSS_FRAME_ID(f, offset) (f[OSS_FRAME_POS_ID + offset] & 0xFC )
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#define OSS_FRAME_LENGTH(f, offset) (f[OSS_FRAME_POS_LEN + offset])
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#define OSS_FRAME_FIELD(f, position) (f[position])
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#define OSS_FRAME_ADDR_T(f, offset) (tvb_get_guint8(f, OSS_FRAME_POS_ADDR + offset) + ((guint8)((tvb_get_guint8( f, OSS_FRAME_POS_ADDR + offset + 1)) << 6) << 2))
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#define OSS_FRAME_ADDR_T2(f, offset, su1, su2) (( tvb_get_guint8(f, OSS_FRAME_POS_ADDR + offset) ^ su1) + ((guint8)(((tvb_get_guint8( f, OSS_FRAME_POS_ADDR + offset + 1) ^ su2)) << 6) << 2))
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#define OSS_FRAME_ID_T(f, offset) (tvb_get_guint8(f, OSS_FRAME_POS_ID + offset) & 0xFC)
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#define OSS_FRAME_LENGTH_T(f, offset) (tvb_get_guint8(f, OSS_FRAME_POS_LEN + offset))
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static int proto_opensafety = -1;
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static gint ett_opensafety = -1;
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static gint ett_opensafety_checksum = -1;
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static gint ett_opensafety_snmt = -1;
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static gint ett_opensafety_ssdo = -1;
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static gint ett_opensafety_spdo = -1;
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static gint ett_opensafety_spdo_flags = -1;
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static gint ett_opensafety_ssdo_sacmd = -1;
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static gint ett_opensafety_ssdo_payload = -1;
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static gint ett_opensafety_ssdo_sodentry = -1;
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static gint ett_opensafety_ssdo_extpar = -1;
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static gint ett_opensafety_sod_mapping = -1;
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static gint ett_opensafety_node = -1;
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static expert_field ei_payload_length_not_positive = EI_INIT;
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static expert_field ei_payload_unknown_format = EI_INIT;
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static expert_field ei_crc_slimssdo_instead_of_spdo = EI_INIT;
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static expert_field ei_crc_frame_1_invalid = EI_INIT;
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static expert_field ei_crc_frame_1_valid_frame2_invalid = EI_INIT;
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static expert_field ei_crc_frame_2_invalid = EI_INIT;
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static expert_field ei_crc_frame_2_unknown_scm_udid = EI_INIT;
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static expert_field ei_crc_frame_2_scm_udid_encoded = EI_INIT;
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static expert_field ei_message_unknown_type = EI_INIT;
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static expert_field ei_message_reassembly_size_differs_from_header = EI_INIT;
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static expert_field ei_message_spdo_address_invalid = EI_INIT;
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static expert_field ei_message_id_field_mismatch = EI_INIT;
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static expert_field ei_scmudid_autodetected = EI_INIT;
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static expert_field ei_scmudid_invalid_preference = EI_INIT;
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static expert_field ei_scmudid_unknown = EI_INIT;
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static expert_field ei_40bit_default_domain = EI_INIT;
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static int hf_oss_msg = -1;
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static int hf_oss_msg_direction = -1;
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static int hf_oss_msg_category = -1;
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static int hf_oss_msg_node = -1;
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static int hf_oss_msg_network = -1;
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static int hf_oss_msg_sender = -1;
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static int hf_oss_msg_receiver = -1;
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static int hf_oss_length= -1;
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static int hf_oss_crc = -1;
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static int hf_oss_crc_valid = -1;
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static int hf_oss_crc2_valid = -1;
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static int hf_oss_crc_type = -1;
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static int hf_oss_snmt_slave = -1;
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static int hf_oss_snmt_master = -1;
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static int hf_oss_snmt_udid = -1;
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static int hf_oss_snmt_scm = -1;
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static int hf_oss_snmt_tool = -1;
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static int hf_oss_snmt_service_id = -1;
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static int hf_oss_snmt_error_group = -1;
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static int hf_oss_snmt_error_code = -1;
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static int hf_oss_snmt_param_type = -1;
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static int hf_oss_snmt_ext_addsaddr = -1;
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static int hf_oss_snmt_ext_addtxspdo = -1;
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static int hf_oss_snmt_ext_initct = -1;
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static int hf_oss_ssdo_server = -1;
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static int hf_oss_ssdo_client = -1;
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static int hf_oss_ssdo_sano = -1;
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static int hf_oss_ssdo_sacmd = -1;
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static int hf_oss_ssdo_sod_index = -1;
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static int hf_oss_ssdo_sod_subindex = -1;
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static int hf_oss_ssdo_payload = -1;
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static int hf_oss_ssdo_payload_size = -1;
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static int hf_oss_ssdo_sodentry_size = -1;
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static int hf_oss_ssdo_sodentry_data = -1;
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static int hf_oss_ssdo_abort_code = -1;
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static int hf_oss_ssdo_preload_queue = -1;
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static int hf_oss_ssdo_preload_error = -1;
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static int hf_oss_sod_par_timestamp = -1;
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static int hf_oss_sod_par_checksum = -1;
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static int hf_oss_ssdo_sodmapping = -1;
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static int hf_oss_ssdo_sodmapping_bits = -1;
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static int hf_oss_ssdo_sacmd_access_type = -1;
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static int hf_oss_ssdo_sacmd_preload = -1;
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static int hf_oss_ssdo_sacmd_abort_transfer = -1;
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static int hf_oss_ssdo_sacmd_segmentation = -1;
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static int hf_oss_ssdo_sacmd_toggle = -1;
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static int hf_oss_ssdo_sacmd_initiate = -1;
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static int hf_oss_ssdo_sacmd_end_segment = -1;
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#if 0
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static int hf_oss_ssdo_sacmd_reserved = -1;
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#endif
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static int hf_oss_ssdo_extpar_parset = -1;
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static int hf_oss_ssdo_extpar_version = -1;
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static int hf_oss_ssdo_extpar_saddr = -1;
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static int hf_oss_ssdo_extpar_length = -1;
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static int hf_oss_ssdo_extpar_crc = -1;
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static int hf_oss_ssdo_extpar_tstamp = -1;
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static int hf_oss_ssdo_extpar_data = -1;
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static int hf_oss_ssdo_extpar = -1;
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static int hf_oss_scm_udid = -1;
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static int hf_oss_scm_udid_auto = -1;
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static int hf_oss_scm_udid_valid = -1;
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static int hf_oss_spdo_direction = -1;
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static int hf_oss_spdo_connection_valid = -1;
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static int hf_oss_spdo_ct = -1;
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static int hf_oss_spdo_ct_40bit = -1;
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static int hf_oss_spdo_time_request = -1;
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static int hf_oss_spdo_time_request_to = -1;
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static int hf_oss_spdo_time_request_from = -1;
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static int hf_oss_spdo_feature_flags = -1;
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static int hf_oss_spdo_feature_flag_40bit_available = -1;
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static int hf_oss_spdo_feature_flag_40bit_used = -1;
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static int hf_oss_fragments = -1;
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static int hf_oss_fragment = -1;
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static int hf_oss_fragment_overlap = -1;
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static int hf_oss_fragment_overlap_conflicts = -1;
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static int hf_oss_fragment_multiple_tails = -1;
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static int hf_oss_fragment_too_long_fragment = -1;
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static int hf_oss_fragment_error = -1;
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static int hf_oss_fragment_count = -1;
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static int hf_oss_reassembled_in = -1;
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static int hf_oss_reassembled_length = -1;
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static int hf_oss_reassembled_data = -1;
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static gint ett_opensafety_ssdo_fragment = -1;
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static gint ett_opensafety_ssdo_fragments = -1;
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static int opensafety_tap = -1;
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static const fragment_items oss_frag_items = {
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/* Fragment subtrees */
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&ett_opensafety_ssdo_fragment,
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&ett_opensafety_ssdo_fragments,
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/* Fragment fields */
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&hf_oss_fragments,
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&hf_oss_fragment,
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&hf_oss_fragment_overlap,
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&hf_oss_fragment_overlap_conflicts,
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&hf_oss_fragment_multiple_tails,
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&hf_oss_fragment_too_long_fragment,
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&hf_oss_fragment_error,
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&hf_oss_fragment_count,
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/* Reassembled in field */
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&hf_oss_reassembled_in,
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/* Reassembled length field */
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&hf_oss_reassembled_length,
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/* Reassembled data */
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&hf_oss_reassembled_data,
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/* Tag */
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"Message fragments"
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};
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static const char *global_scm_udid = "00:00:00:00:00:00";
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static dissector_handle_t data_dissector = NULL;
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static gboolean global_display_intergap_data = FALSE;
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static gboolean global_scm_udid_autoset = TRUE;
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static gboolean global_udp_frame2_first = FALSE;
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static gboolean global_siii_udp_frame2_first = FALSE;
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static gboolean global_mbtcp_big_endian = FALSE;
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static guint global_network_udp_port = OPENSAFETY_UDP_PORT;
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static guint global_network_udp_port_sercosiii = OPENSAFETY_UDP_PORT_SIII;
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static gboolean global_classify_transport = TRUE;
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static gboolean global_enable_plk = TRUE;
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static gboolean global_enable_udp = TRUE;
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static gboolean global_enable_genudp = TRUE;
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static gboolean global_enable_siii = TRUE;
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static gboolean global_enable_pnio = FALSE;
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static gboolean global_enable_mbtcp = TRUE;
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static heur_dissector_list_t heur_opensafety_spdo_subdissector_list;
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static gboolean bDissector_Called_Once_Before = FALSE;
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/* Using local_scm_udid as read variable for global_scm_udid, to
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* enable automatic detection of scm udid */
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static char *local_scm_udid = NULL;
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static reassembly_table os_reassembly_table;
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/* Resets the dissector in case the dissection is malformed and the dissector crashes */
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static void
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reset_dissector(void)
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{
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bDissector_Called_Once_Before = FALSE;
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}
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static void
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setup_dissector(void)
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{
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reassembly_table_init(&os_reassembly_table, &addresses_reassembly_table_functions);
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}
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static void
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cleanup_dissector(void)
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{
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local_scm_udid = NULL;
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reassembly_table_destroy(&os_reassembly_table);
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}
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void proto_register_opensafety(void);
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void proto_reg_handoff_opensafety(void);
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/* Conversation functions */
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/* This is defined by the specification. The Address field is 10 bits long, and the node with the number
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* 1 is always the SCM, therefore ( 2 ^ 10 ) - 1 nodes can be addressed. We use 2 ^ 10 here, because the
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* SCM can talk to himself (Assign SADR for instance ) */
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/* #define MAX_NUMBER_OF_SAFETY_NODES ( 1 << 10 ) */
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/* Tracks the information that the packet pinfo has been received by receiver, and adds that information to the tree, using pos, as
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* byte position in the PDU */
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static void
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opensafety_packet_node(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree,
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gint hf_field, guint16 saddr, guint16 posInFrame, guint16 posSdnInFrame, guint16 sdn )
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{
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proto_item *psf_item = NULL;
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proto_tree *psf_tree = NULL;
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psf_item = proto_tree_add_uint(tree, hf_field, message_tvb, posInFrame, 2, saddr);
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psf_tree = proto_item_add_subtree(psf_item, ett_opensafety_node);
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psf_item = proto_tree_add_uint(psf_tree, hf_oss_msg_node, message_tvb, posInFrame, 2, saddr);
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PROTO_ITEM_SET_GENERATED(psf_item);
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if ( sdn > 0 )
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{
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psf_item = proto_tree_add_uint_format_value(psf_tree, hf_oss_msg_network, message_tvb,
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posSdnInFrame, 2, sdn, "0x%04X", sdn);
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} else if ( sdn <= 0 ) {
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psf_item = proto_tree_add_uint_format_value(psf_tree, hf_oss_msg_network, message_tvb,
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posSdnInFrame, 2, sdn * -1, "0x%04X", sdn * -1);
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expert_add_info(pinfo, psf_item, &ei_scmudid_unknown );
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}
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PROTO_ITEM_SET_GENERATED(psf_item);
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}
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static void
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opensafety_packet_receiver(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree,
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opensafety_packet_info *packet, guint16 recv,
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guint16 posInFrame, guint16 posSdnInFrame, guint16 sdn )
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{
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packet->receiver = recv;
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if ( sdn > 0 )
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packet->sdn = sdn;
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opensafety_packet_node (message_tvb, pinfo, tree, hf_oss_msg_receiver, recv, posInFrame, posSdnInFrame, sdn );
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}
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/* Tracks the information that the packet pinfo has been sent by sender, and received by everyone else, and adds that information to
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* the tree, using pos, as byte position in the PDU */
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static void
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opensafety_packet_sender(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree,
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opensafety_packet_info *packet, guint16 sender,
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guint16 posInFrame, guint16 posSdnInFrame, guint16 sdn )
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{
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packet->sender = sender;
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if ( sdn > 0 )
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packet->sdn = sdn;
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opensafety_packet_node (message_tvb, pinfo, tree, hf_oss_msg_sender, sender, posInFrame, posSdnInFrame, sdn );
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}
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/* Tracks the information that the packet pinfo has been sent by sender, and received by receiver, and adds that information to
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* the tree, using pos for the sender and pos2 for the receiver, as byte position in the PDU */
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static void
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opensafety_packet_sendreceiv(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree,
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opensafety_packet_info *packet, guint16 send, guint16 pos,
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guint16 recv, guint16 pos2, guint16 posnet, guint16 sdn)
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{
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opensafety_packet_receiver(message_tvb, pinfo, tree, packet, recv, pos2, posnet, sdn);
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opensafety_packet_sender(message_tvb, pinfo, tree, packet, send, pos, posnet, sdn);
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}
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static proto_item *
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opensafety_packet_response(tvbuff_t *message_tvb, proto_tree *sub_tree, opensafety_packet_info *packet, gboolean isResponse)
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{
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proto_item *item = NULL;
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|
|
|
proto_tree_add_item(sub_tree, hf_oss_msg, message_tvb,
|
|
OSS_FRAME_POS_ID + packet->frame.subframe1, 1, ENC_NA );
|
|
item = proto_tree_add_item(sub_tree, packet->msg_type != OPENSAFETY_SPDO_MESSAGE_TYPE ? hf_oss_msg_direction : hf_oss_spdo_direction,
|
|
message_tvb, OSS_FRAME_POS_ID + packet->frame.subframe1, 1, ENC_NA);
|
|
if ( ! isResponse )
|
|
packet->is_request = TRUE;
|
|
|
|
return item;
|
|
}
|
|
|
|
static proto_tree *
|
|
opensafety_packet_payloadtree(tvbuff_t *message_tvb, proto_tree *opensafety_tree,
|
|
opensafety_packet_info *packet, gint ett_tree)
|
|
{
|
|
proto_item *item = NULL;
|
|
|
|
item = proto_tree_add_item(opensafety_tree, hf_oss_msg_category, message_tvb, OSS_FRAME_POS_ID + packet->frame.subframe1, 1, ENC_NA );
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
if ( packet->msg_type == OPENSAFETY_SNMT_MESSAGE_TYPE)
|
|
packet->payload.snmt = wmem_new0(wmem_packet_scope(), opensafety_packet_snmt);
|
|
else if ( packet->msg_type == OPENSAFETY_SSDO_MESSAGE_TYPE || packet->msg_type == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE )
|
|
{
|
|
packet->payload.ssdo = wmem_new0(wmem_packet_scope(), opensafety_packet_ssdo);
|
|
if ( packet->msg_type == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE )
|
|
packet->payload.ssdo->is_slim = TRUE;
|
|
}
|
|
else if ( packet->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
packet->payload.spdo = wmem_new0(wmem_packet_scope(), opensafety_packet_spdo);
|
|
|
|
return proto_item_add_subtree(item, ett_tree);
|
|
}
|
|
|
|
static guint16
|
|
findFrame1Position ( tvbuff_t *message_tvb, guint16 byte_offset, guint8 dataLength, gboolean checkIfSlimMistake )
|
|
{
|
|
guint16 i_wFrame1Position = 0;
|
|
guint16 i_payloadLength, i_calculatedLength = 0;
|
|
guint16 i_offset = 0, calcCRC = 0, frameCRC = 0;
|
|
guint8 b_tempByte = 0;
|
|
guint8 *bytes = NULL;
|
|
|
|
/*
|
|
* First, a normal package is assumed. Calculation of frame 1 position is
|
|
* pretty easy, because, the length of the whole package is 11 + 2*n + 2*o, which
|
|
* results in frame 1 start at (6 + n + o), which is length / 2 + 1
|
|
*/
|
|
i_wFrame1Position = dataLength / 2 + 1;
|
|
i_payloadLength = tvb_get_guint8(message_tvb, byte_offset + i_wFrame1Position + 2 );
|
|
/* Calculating the assumed frame length, taking CRC8/CRC16 into account */
|
|
i_calculatedLength = i_payloadLength * 2 + 11 + 2 * (i_payloadLength > OSS_PAYLOAD_MAXSIZE_FOR_CRC8 ? 1 : 0);
|
|
|
|
/* To prevent miscalculations, where by chance the byte at [length / 2] + 3 is a value matching a possible payload length,
|
|
* but in reality the frame is a slim ssdo, the CRC of frame 1 gets checked additionally. This check
|
|
* is somewhat time consuming, so it will only run if the normal check led to a mistake detected along the line */
|
|
if ( checkIfSlimMistake && i_calculatedLength == dataLength )
|
|
{
|
|
if (dataLength > OSS_PAYLOAD_MAXSIZE_FOR_CRC8)
|
|
frameCRC = tvb_get_letohs(message_tvb, byte_offset + i_wFrame1Position + dataLength + OSS_FRAME_POS_DATA);
|
|
else
|
|
frameCRC = tvb_get_guint8(message_tvb, byte_offset + i_wFrame1Position + dataLength + OSS_FRAME_POS_DATA);
|
|
|
|
bytes = (guint8*)tvb_memdup(wmem_packet_scope(), message_tvb, byte_offset + i_wFrame1Position, dataLength + 4);
|
|
if ( dataLength > OSS_PAYLOAD_MAXSIZE_FOR_CRC8 )
|
|
{
|
|
calcCRC = crc16_0x755B(bytes, dataLength + 4, 0);
|
|
if ( frameCRC != calcCRC )
|
|
calcCRC = crc16_0x5935(bytes, dataLength + 4, 0);
|
|
}
|
|
else
|
|
calcCRC = crc8_0x2F(bytes, dataLength + 4, 0);
|
|
|
|
/* if the calculated crc does not match the detected, the package is not a normal openSAFETY package */
|
|
if ( frameCRC != calcCRC )
|
|
dataLength = 0;
|
|
}
|
|
|
|
/* If the calculated length differs from the given length, a slim package is assumed. */
|
|
if ( i_calculatedLength != dataLength )
|
|
{
|
|
/* possible slim package */
|
|
i_wFrame1Position = 0;
|
|
/*
|
|
* Slim packages have a fixed sublength of either 6 bytes for frame 2 in
|
|
* case of crc8 and 7 bytes in case of crc16
|
|
*/
|
|
i_offset = OSS_SLIM_FRAME2_WITH_CRC8 + ( dataLength < (OSS_SLIM_FRAME_WITH_CRC8_MAXSIZE + 1) ? 0 : 1 );
|
|
/* Last 2 digits belong to addr, therefore have to be cleared */
|
|
b_tempByte = ( tvb_get_guint8 ( message_tvb, byte_offset + i_offset + 1 ) ) & 0xFC;
|
|
|
|
/* If the id byte xor 0xE8 is 0, we have a slim package */
|
|
if ( ( ( b_tempByte ^ OPENSAFETY_MSG_SSDO_SLIM_SERVICE_REQUEST ) == 0 ) ||
|
|
( ( b_tempByte ^ OPENSAFETY_MSG_SSDO_SLIM_SERVICE_RESPONSE ) == 0 ) )
|
|
{
|
|
/* Slim package found */
|
|
i_wFrame1Position = i_offset;
|
|
}
|
|
}
|
|
|
|
return i_wFrame1Position;
|
|
}
|
|
|
|
static gboolean findSafetyFrame ( tvbuff_t *message_tvb, guint u_Offset, gboolean b_frame2first,
|
|
guint *u_frameOffset, guint *u_frameLength, opensafety_packet_info *packet )
|
|
{
|
|
guint ctr, rem_length;
|
|
guint16 crc, f2crc, calcCrc;
|
|
guint8 b_Length, b_CTl, crcOffset, crc1Type;
|
|
guint8 *bytes;
|
|
guint b_ID;
|
|
gboolean found;
|
|
|
|
found = FALSE;
|
|
ctr = u_Offset;
|
|
rem_length = tvb_reported_length_remaining (message_tvb, ctr);
|
|
|
|
/* Search will allways start at the second byte of the frame ( cause it determines )
|
|
* the type of package and therefore everything else. Therefore the mininmum length - 1
|
|
* is the correct minimum length */
|
|
while ( packet != NULL && rem_length >= ( OSS_MINIMUM_LENGTH - 1 ) )
|
|
{
|
|
/* The ID byte must ALWAYS be the second byte, therefore 0 is invalid,
|
|
* also, the byte we want to access, must at least exist, otherwise,
|
|
* the frame is not detectable as an openSAFETY frame.
|
|
* We check for ID and length */
|
|
if ( ctr != 0 && tvb_bytes_exist(message_tvb, ctr, 2) )
|
|
{
|
|
*u_frameLength = 0;
|
|
*u_frameOffset = 0;
|
|
|
|
crcOffset = 0;
|
|
b_ID = tvb_get_guint8(message_tvb, ctr );
|
|
|
|
if ( b_ID != 0x0 )
|
|
{
|
|
b_Length = tvb_get_guint8(message_tvb, ctr + 1 );
|
|
|
|
/* 0xFF is often used, but always false, otherwise start detection, if the highest
|
|
* bit is set */
|
|
if ( ( b_ID != 0xFF ) && ( b_ID & 0x80 ) )
|
|
{
|
|
/* The rem_length value might be poluted, due to the else statement of
|
|
* above if-decision (frame at end position detection). Therefore we
|
|
* calculate it here again, to have a sane value */
|
|
rem_length = tvb_reported_length_remaining(message_tvb, ctr);
|
|
|
|
/* Plausability check on length */
|
|
if ( (guint)( b_Length * 2 ) < ( rem_length + OSS_MINIMUM_LENGTH ) )
|
|
{
|
|
|
|
/* The calculated length must fit, but for the CRC16 check, also the calculated length
|
|
* plus the CRC16 end position must fit in the remaining length */
|
|
if ( ( b_Length <= (guint) 8 && ( b_Length <= rem_length ) ) ||
|
|
( b_Length > (guint) 8 && ( ( b_Length + (guint) 5 ) <= rem_length ) ) )
|
|
{
|
|
/* Ensure, that the correct length for CRC calculation
|
|
* still exists in byte stream, so that we can calculate the crc */
|
|
if ( tvb_bytes_exist(message_tvb, ctr - 1, b_Length + 5) )
|
|
{
|
|
/* An openSAFETY command has to have a high-byte range between 0x0A and 0x0E
|
|
* b_ID & 0x80 took care of everything underneath, we check for 0x09 and 0x0F,
|
|
* as they remain the only values left, which are not valid */
|
|
if ( ( ( b_ID >> 4 ) != 0x09 ) && ( ( b_ID >> 4 ) != 0x0F ) )
|
|
{
|
|
/* Read CRC from position */
|
|
crc = tvb_get_guint8(message_tvb, ctr + 3 + b_Length );
|
|
|
|
/* There exists some false positives, where the only possible
|
|
* data information in the frame is the ID and the ADDR fields.
|
|
* The rest of the fields in frame 1 are zeroed out. The packet
|
|
* must be filtered out and may not be used. To detect it, we
|
|
* check for the CT value, which, if zero indicates strongly
|
|
* that this is false-positive. */
|
|
b_CTl = tvb_get_guint8(message_tvb, ctr + 2 );
|
|
|
|
/* If either length, crc or CTl is not zero, this may be a
|
|
* correct package. If all three are 0, this is most certainly
|
|
* an incorrect package, because the possibility of a valid
|
|
* package with all three values being zero is next to impossible */
|
|
if ( b_Length != 0x00 || crc != 0x00 || b_CTl != 0x00 )
|
|
{
|
|
/* calculate checksum */
|
|
bytes = (guint8 *)tvb_memdup(wmem_packet_scope(), message_tvb, ctr - 1, b_Length + 5 );
|
|
if ( b_Length > 8 )
|
|
{
|
|
crc = tvb_get_letohs ( message_tvb, ctr + 3 + b_Length );
|
|
crcOffset = 1;
|
|
|
|
crc1Type = OPENSAFETY_CHECKSUM_CRC16;
|
|
calcCrc = crc16_0x755B( bytes, b_Length + 4, 0 );
|
|
if ( ( crc ^ calcCrc ) != 0 )
|
|
{
|
|
calcCrc = crc16_0x5935( bytes, b_Length + 4, 0 );
|
|
if ( ( crc ^ calcCrc ) == 0 )
|
|
crc1Type = OPENSAFETY_CHECKSUM_CRC16SLIM;
|
|
else
|
|
crc1Type = OPENSAFETY_CHECKSUM_INVALID;
|
|
}
|
|
} else {
|
|
crc1Type = OPENSAFETY_CHECKSUM_CRC8;
|
|
calcCrc = crc8_0x2F ( bytes, b_Length + 4, 0 );
|
|
}
|
|
|
|
if ( ( crc ^ calcCrc ) == 0 )
|
|
{
|
|
/* Check if this is a Slim SSDO message */
|
|
if ( ( b_ID >> 3 ) == ( OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE >> 3 ) )
|
|
{
|
|
/* Slim SSDO messages must have a length != 0, as the first byte
|
|
* in the payload contains the SOD access command */
|
|
if ( b_Length > 0 )
|
|
{
|
|
*u_frameOffset = ( ctr - 1 );
|
|
*u_frameLength = b_Length + 2 * crcOffset + 11;
|
|
|
|
/* It is highly unlikely, that both frame 1 and frame 2 generate
|
|
* a crc == 0 or equal crc's. Therefore we check, if both crc's are
|
|
* equal. If so, it is a falsely detected frame. */
|
|
f2crc = tvb_get_guint8 ( message_tvb, ctr + 3 + 5 + b_Length );
|
|
if ( b_Length > 8 )
|
|
f2crc = tvb_get_letohs ( message_tvb, ctr + 3 + 5 + b_Length );
|
|
if ( crc != f2crc )
|
|
{
|
|
found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*u_frameLength = 2 * b_Length + 2 * crcOffset + 11;
|
|
*u_frameOffset = ( ctr - 1 );
|
|
|
|
/* If the first crc is zero, the second one must not be 0. The header
|
|
* for each subfields differ, therefore it is impossible, that both
|
|
* crcs are zero */
|
|
if ( crc == 0 )
|
|
{
|
|
f2crc = tvb_get_guint8 ( message_tvb, ( ctr - 1 ) + 10 + ( 2 * b_Length ) );
|
|
if ( b_Length > 8 )
|
|
f2crc = tvb_get_letohs ( message_tvb, ( ctr - 1 ) + 11 + ( 2 * b_Length ) );
|
|
|
|
/* The crc's differ, everything is ok */
|
|
if ( crc != f2crc )
|
|
{
|
|
found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* At this point frames had been checked for SoC and SoA types of
|
|
* EPL. This is no longer necessary and leads to false-negatives.
|
|
* SoC and SoA frames get filtered out at the EPL entry point, cause
|
|
* EPL only provides payload, no longer complete frames. */
|
|
found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* There exist frames, where the last openSAFETY frame is sitting in the
|
|
* very last bytes of the frame, and the complete frame itself contains
|
|
* more than one openSAFETY frame. It so happens that in such a case, the
|
|
* last openSAFETY frame will miss detection.
|
|
*
|
|
* If so we look at the transported length, calculate the frame length,
|
|
* and take a look if the calculated frame length, might be a fit for the
|
|
* remaining length. If such is the case, we increment ctr and increment
|
|
* rem_length (to hit the while loop one more time) and the frame will be
|
|
* detected correctly. */
|
|
if ( rem_length == OSS_MINIMUM_LENGTH )
|
|
{
|
|
b_ID = tvb_get_guint8(message_tvb, ctr );
|
|
b_Length = tvb_get_guint8(message_tvb, ctr + 2 );
|
|
if ( ( b_ID >> 3 ) == ( OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE >> 3 ) )
|
|
b_Length = ( 11 + ( b_Length > 8 ? 2 : 0 ) + b_Length );
|
|
else
|
|
b_Length = ( 11 + ( b_Length > 8 ? 2 : 0 ) + 2 * b_Length );
|
|
|
|
if ( rem_length == b_Length )
|
|
{
|
|
ctr++;
|
|
rem_length++;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ctr++;
|
|
rem_length = tvb_reported_length_remaining(message_tvb, ctr);
|
|
|
|
}
|
|
|
|
/* Store packet information in packet_info */
|
|
if ( found )
|
|
{
|
|
packet->msg_id = b_ID;
|
|
packet->msg_len = b_Length;
|
|
packet->frame_len = *u_frameLength;
|
|
|
|
/* Should be the calculated crc, which is the same as the frame crc */
|
|
packet->crc.frame1 = calcCrc;
|
|
packet->crc.type = crc1Type;
|
|
if ( packet->crc.type != OPENSAFETY_CHECKSUM_INVALID )
|
|
packet->crc.valid1 = TRUE;
|
|
else
|
|
packet->crc.valid1 = FALSE;
|
|
}
|
|
|
|
/* Seem redundant if b_frame2First is false. But in this case, the function is needed for the
|
|
* simple detection of a possible openSAFETY frame. */
|
|
if ( b_frame2first && found )
|
|
*u_frameOffset = u_Offset;
|
|
|
|
return found;
|
|
}
|
|
|
|
static gint
|
|
dissect_data_payload ( proto_tree *epl_tree, tvbuff_t *tvb, packet_info *pinfo, gint offset, gint len, guint8 msgType )
|
|
{
|
|
gint off = 0;
|
|
tvbuff_t * payload_tvb = NULL;
|
|
heur_dtbl_entry_t *hdtbl_entry = NULL;
|
|
|
|
off = offset;
|
|
|
|
if (len > 0)
|
|
{
|
|
payload_tvb = tvb_new_subset(tvb, off, len, tvb_reported_length_remaining(tvb, offset) );
|
|
if ( ! dissector_try_heuristic(heur_opensafety_spdo_subdissector_list, payload_tvb, pinfo, epl_tree, &hdtbl_entry, &msgType))
|
|
call_dissector(data_dissector, payload_tvb, pinfo, epl_tree);
|
|
|
|
off += len;
|
|
}
|
|
|
|
return off;
|
|
}
|
|
|
|
static void
|
|
dissect_opensafety_spdo_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *opensafety_tree,
|
|
opensafety_packet_info * packet )
|
|
{
|
|
proto_item *item, *diritem;
|
|
proto_tree *spdo_tree, *spdo_flags_tree;
|
|
guint16 ct;
|
|
guint64 ct40bit;
|
|
gint16 taddr, sdn;
|
|
guint dataLength;
|
|
guint8 tr, b_ID, spdoFlags;
|
|
|
|
dataLength = tvb_get_guint8(message_tvb, OSS_FRAME_POS_LEN + packet->frame.subframe1);
|
|
b_ID = tvb_get_guint8(message_tvb, packet->frame.subframe1 + 1) & 0xF8;
|
|
|
|
/* Network address is xor'ed into the start of the second frame, but only legible, if the scm given is valid */
|
|
sdn = ( ( OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1) ) ^
|
|
( OSS_FRAME_ADDR_T2(message_tvb, packet->frame.subframe2, packet->scm_udid[0], packet->scm_udid[1]) ) );
|
|
if ( ! packet->scm_udid_valid )
|
|
sdn = ( -1 * sdn );
|
|
|
|
/* taddr is the 4th octet in the second frame */
|
|
tr = ( tvb_get_guint8(message_tvb, packet->frame.subframe2 + 4) ^ packet->scm_udid[4] ) & 0xFC;
|
|
|
|
/* allow only valid SPDO flags */
|
|
spdoFlags = ( ( tr >> 2 ) & OPENSAFETY_SPDO_FEATURE_FLAGS );
|
|
|
|
/* An SPDO is always sent by the producer, to everybody else .
|
|
* For a 40bit connection OPENSAFETY_DEFAULT_DOMAIN is assumed as sdn value for now */
|
|
if ( (OPENSAFETY_SPDO_FEAT_40BIT_USED & spdoFlags ) == OPENSAFETY_SPDO_FEAT_40BIT_USED )
|
|
sdn = OPENSAFETY_DEFAULT_DOMAIN;
|
|
|
|
opensafety_packet_node ( message_tvb, pinfo, opensafety_tree, hf_oss_msg_sender,
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1),
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe1, packet->frame.subframe2, sdn );
|
|
|
|
spdo_tree = opensafety_packet_payloadtree ( message_tvb, opensafety_tree, packet, ett_opensafety_spdo );
|
|
|
|
/* Determine SPDO Flags. Attention packet->payload.spdo exists ONLY AFTER opensafety_packet_payloadtree */
|
|
packet->payload.spdo->flags.enabled40bit = FALSE;
|
|
packet->payload.spdo->flags.requested40bit = FALSE;
|
|
|
|
if ( (OPENSAFETY_SPDO_FEAT_40BIT_AVAIL & spdoFlags ) == OPENSAFETY_SPDO_FEAT_40BIT_AVAIL )
|
|
packet->payload.spdo->flags.requested40bit = TRUE;
|
|
if ( packet->payload.spdo->flags.requested40bit && ( (OPENSAFETY_SPDO_FEAT_40BIT_USED & spdoFlags ) == OPENSAFETY_SPDO_FEAT_40BIT_USED ) )
|
|
packet->payload.spdo->flags.enabled40bit = TRUE;
|
|
|
|
diritem = opensafety_packet_response(message_tvb, spdo_tree, packet, b_ID == OPENSAFETY_MSG_SPDO_DATA_WITH_TIME_RESPONSE );
|
|
proto_tree_add_item(spdo_tree, hf_oss_spdo_connection_valid, message_tvb, OSS_FRAME_POS_ID + packet->frame.subframe1, 1, ENC_NA);
|
|
|
|
packet->payload.spdo->conn_valid = (tvb_get_guint8(message_tvb, OSS_FRAME_POS_ID + packet->frame.subframe1) & 0x04) == 0x04;
|
|
|
|
/* taddr is the 4th octet in the second frame */
|
|
taddr = OSS_FRAME_ADDR_T2(message_tvb, packet->frame.subframe2 + 3, packet->scm_udid[3], packet->scm_udid[4]);
|
|
tr = ( tvb_get_guint8(message_tvb, packet->frame.subframe2 + 4) ^ packet->scm_udid[4] ) & 0xFC;
|
|
|
|
/* determine the ct value. if complete it can be used for analysis of the package */
|
|
ct = tvb_get_guint8(message_tvb, packet->frame.subframe1 + 3);
|
|
if ( packet->scm_udid_valid )
|
|
{
|
|
ct = (guint16)((tvb_get_guint8(message_tvb, packet->frame.subframe2 + 2) ^ packet->scm_udid[2]) << 8) +
|
|
(tvb_get_guint8(message_tvb, packet->frame.subframe1 + 3));
|
|
}
|
|
|
|
if ( b_ID == OPENSAFETY_MSG_SPDO_DATA_WITH_TIME_REQUEST )
|
|
{
|
|
proto_item_append_text(diritem, " (Safety Node: %03d)", taddr);
|
|
item = proto_tree_add_uint_format_value(spdo_tree, hf_oss_spdo_ct, message_tvb, 0, 0, ct,
|
|
"0x%04X [%d] (%s)", ct, ct,
|
|
(packet->scm_udid_valid ? "Complete" : "Low byte only"));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
packet->payload.spdo->counter.b16 = ct;
|
|
|
|
packet->payload.spdo->timerequest = taddr;
|
|
proto_tree_add_uint(spdo_tree, hf_oss_spdo_time_request, message_tvb,
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe2 + 4, 1, tr);
|
|
opensafety_packet_node ( message_tvb, pinfo, spdo_tree, hf_oss_spdo_time_request_from, taddr,
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe2 + 3, packet->frame.subframe2, sdn );
|
|
}
|
|
else
|
|
{
|
|
if ( ! (b_ID == OPENSAFETY_MSG_SPDO_DATA_ONLY) || !(packet->payload.spdo->flags.enabled40bit) )
|
|
{
|
|
item = proto_tree_add_uint_format_value(spdo_tree, hf_oss_spdo_ct, message_tvb, 0, 0, ct,
|
|
"0x%04X [%d] (%s)", ct, ct, (packet->scm_udid_valid ? "Complete" : "Low byte only"));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
packet->payload.spdo->counter.b16 = ct;
|
|
}
|
|
else
|
|
{
|
|
/* 40bit counter is calculated from various fields. Therefore it cannot be read
|
|
* directly from the frame. All fields starting after or with packet->frame.subframe2 have to
|
|
* be decoded using the scm udid */
|
|
ct40bit = (tvb_get_guint8(message_tvb, packet->frame.subframe2 + 3) ^ packet->scm_udid[3]);
|
|
ct40bit <<= 8;
|
|
ct40bit += ((guint64)(tvb_get_guint8(message_tvb, packet->frame.subframe2 + 1) ^ packet->scm_udid[1]) ^ tvb_get_guint8(message_tvb, packet->frame.subframe1 + 1));
|
|
ct40bit <<= 8;
|
|
ct40bit += (tvb_get_guint8(message_tvb, packet->frame.subframe2 + 0) ^ packet->scm_udid[0]) ^ OPENSAFETY_DEFAULT_DOMAIN ^ tvb_get_guint8(message_tvb, packet->frame.subframe1 + 0);
|
|
ct40bit <<= 8;
|
|
ct40bit += (tvb_get_guint8(message_tvb, packet->frame.subframe2 + 2) ^ packet->scm_udid[2]);
|
|
ct40bit <<= 8;
|
|
ct40bit += tvb_get_guint8(message_tvb, packet->frame.subframe1 + 3);
|
|
|
|
item = proto_tree_add_uint64(spdo_tree, hf_oss_spdo_ct_40bit, message_tvb, 0, 0, ct40bit);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
packet->payload.spdo->counter.b40 = ct40bit;
|
|
expert_add_info ( pinfo, item, &ei_40bit_default_domain );
|
|
}
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
if ( b_ID == OPENSAFETY_MSG_SPDO_DATA_WITH_TIME_RESPONSE )
|
|
{
|
|
proto_item_append_text(diritem, " (Safety Node: %03d)", taddr);
|
|
proto_tree_add_uint(spdo_tree, hf_oss_spdo_time_request, message_tvb,
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe2 + 4, 1, tr);
|
|
packet->payload.spdo->timerequest = taddr;
|
|
|
|
opensafety_packet_node ( message_tvb, pinfo, spdo_tree, hf_oss_spdo_time_request_to, taddr,
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe2 + 3, packet->frame.subframe2, sdn );
|
|
}
|
|
else
|
|
{
|
|
item = proto_tree_add_uint(spdo_tree, hf_oss_spdo_feature_flags,
|
|
message_tvb, OSS_FRAME_POS_ADDR + packet->frame.subframe2 + 4, 1, spdoFlags << 2);
|
|
|
|
spdo_flags_tree = proto_item_add_subtree(item, ett_opensafety_spdo_flags);
|
|
|
|
proto_tree_add_boolean(spdo_flags_tree, hf_oss_spdo_feature_flag_40bit_available, message_tvb,
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe2 + 4, 1,
|
|
packet->payload.spdo->flags.requested40bit ? OPENSAFETY_SPDO_FEAT_40BIT_AVAIL << 2 : 0 );
|
|
proto_tree_add_boolean(spdo_flags_tree, hf_oss_spdo_feature_flag_40bit_used, message_tvb,
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe2 + 4, 1,
|
|
packet->payload.spdo->flags.enabled40bit ? OPENSAFETY_SPDO_FEAT_40BIT_USED << 2 : 0 );
|
|
}
|
|
}
|
|
|
|
if ( dataLength > 0 )
|
|
{
|
|
dissect_data_payload(spdo_tree, message_tvb, pinfo, OSS_FRAME_POS_ID + 3, dataLength, OPENSAFETY_SPDO_MESSAGE_TYPE);
|
|
}
|
|
}
|
|
|
|
static void dissect_opensafety_ssdo_payload ( packet_info *pinfo, tvbuff_t *new_tvb, proto_tree *ssdo_payload, guint8 sacmd )
|
|
{
|
|
guint dataLength = 0, ctr = 0, n = 0, nCRCs = 0;
|
|
guint8 ssdoSubIndex = 0;
|
|
guint16 ssdoIndex = 0, dispSSDOIndex = 0;
|
|
guint32 sodLength = 0, entry = 0;
|
|
proto_item *item;
|
|
proto_tree *sod_tree, *ext_tree;
|
|
|
|
dataLength = tvb_captured_length(new_tvb);
|
|
|
|
ssdoIndex = tvb_get_letohs(new_tvb, 0);
|
|
|
|
sodLength = tvb_get_letohl(new_tvb, 4);
|
|
|
|
/* first check for extended parameter */
|
|
if ( dataLength == 16 || sodLength == ( dataLength - 16 ) || ssdoIndex == 0x0101 )
|
|
{
|
|
/* extended parameter header & data */
|
|
item = proto_tree_add_string_format(ssdo_payload, hf_oss_ssdo_extpar,
|
|
new_tvb, 0, dataLength, "", "Extended Parameter Set: %s",
|
|
(dataLength == 16 ? "Header only" : "Header & Data") );
|
|
ext_tree = proto_item_add_subtree(item, ett_opensafety_ssdo_extpar);
|
|
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_extpar_parset, new_tvb, 0, 1, ENC_BIG_ENDIAN );
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_extpar_version, new_tvb, 1, 1, ENC_BIG_ENDIAN );
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_extpar_saddr, new_tvb, 2, 2, ENC_LITTLE_ENDIAN );
|
|
|
|
proto_tree_add_uint_format_value(ext_tree, hf_oss_ssdo_extpar_length,
|
|
new_tvb, 4, 4, sodLength, "0x%04X (%d octets)",
|
|
sodLength, sodLength );
|
|
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_extpar_crc, new_tvb, 8, 4, ENC_LITTLE_ENDIAN );
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_extpar_tstamp, new_tvb, 12, 4, ENC_LITTLE_ENDIAN );
|
|
|
|
if ( dataLength != 16 )
|
|
{
|
|
item = proto_tree_add_item(ext_tree, hf_oss_ssdo_extpar_data, new_tvb, 16, dataLength - 16, ENC_NA );
|
|
|
|
if ( ( dataLength - sodLength ) != 16 )
|
|
expert_add_info ( pinfo, item, &ei_message_reassembly_size_differs_from_header );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* If == upload, it is most likely a par upload */
|
|
if ( sacmd == OPENSAFETY_MSG_SSDO_UPLOAD_SEGMENT_END && ( dataLength % 4 == 0 ) )
|
|
{
|
|
|
|
item = proto_tree_add_uint_format_value(ssdo_payload, hf_oss_ssdo_sod_index, new_tvb,
|
|
0, 0, 0x1018, "0x%04X (%s)", 0x1018,
|
|
val_to_str_ext_const( ((guint32) (0x1018 << 16) ),
|
|
&opensafety_sod_idx_names_ext, "Unknown") );
|
|
sod_tree = proto_item_add_subtree(item, ett_opensafety_ssdo_sodentry);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
item = proto_tree_add_uint_format_value(sod_tree, hf_oss_ssdo_sod_subindex, new_tvb, 0, 0,
|
|
0x06, "0x%02X (%s)", 0x06,
|
|
val_to_str_ext_const(((guint32) (0x1018 << 16) + 0x06),
|
|
&opensafety_sod_idx_names_ext, "Unknown") );
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
entry = tvb_get_letohl ( new_tvb, 0 );
|
|
proto_tree_add_uint_format_value ( sod_tree, hf_oss_sod_par_timestamp, new_tvb, 0,
|
|
4, entry, "0x%08X", entry );
|
|
|
|
/* This is to avoid a compiler loop optimization warning */
|
|
nCRCs = dataLength / 4;
|
|
for ( ctr = 1; ctr < nCRCs; ctr++ )
|
|
{
|
|
entry = tvb_get_letohl ( new_tvb, ctr * 4 );
|
|
proto_tree_add_uint_format_value ( sod_tree, hf_oss_sod_par_checksum, new_tvb, ctr * 4,
|
|
4, entry, "[#%d] 0x%08X", ctr, entry );
|
|
}
|
|
}
|
|
/* If != upload, it is most likely a 101A download */
|
|
else
|
|
{
|
|
|
|
/* normal parameter set */
|
|
for ( ctr = 0; ctr < dataLength; ctr++ )
|
|
{
|
|
ssdoIndex = tvb_get_letohs(new_tvb, ctr);
|
|
ssdoSubIndex = tvb_get_guint8(new_tvb, ctr + 2);
|
|
dispSSDOIndex = ssdoIndex;
|
|
|
|
if ( ssdoIndex >= 0x1400 && ssdoIndex <= 0x17FE )
|
|
dispSSDOIndex = 0x1400;
|
|
else if ( ssdoIndex >= 0x1800 && ssdoIndex <= 0x1BFE )
|
|
dispSSDOIndex = 0x1800;
|
|
else if ( ssdoIndex >= 0x1C00 && ssdoIndex <= 0x1FFE )
|
|
dispSSDOIndex = 0x1C00;
|
|
else if ( ssdoIndex >= 0xC000 && ssdoIndex <= 0xC3FE )
|
|
dispSSDOIndex = 0xC000;
|
|
|
|
item = proto_tree_add_uint_format_value(ssdo_payload, hf_oss_ssdo_sod_index, new_tvb,
|
|
ctr, 2, ssdoIndex, "0x%04X (%s)", ssdoIndex,
|
|
val_to_str_ext_const( ((guint32) (dispSSDOIndex << 16) ),
|
|
&opensafety_sod_idx_names_ext, "Unknown") );
|
|
if ( ssdoIndex != dispSSDOIndex )
|
|
PROTO_ITEM_SET_GENERATED ( item );
|
|
|
|
if ( ssdoIndex < 0x1000 || ssdoIndex > 0xE7FF )
|
|
expert_add_info ( pinfo, item, &ei_payload_unknown_format );
|
|
|
|
sod_tree = proto_item_add_subtree(item, ett_opensafety_ssdo_sodentry);
|
|
|
|
if ( ssdoSubIndex != 0 )
|
|
{
|
|
proto_tree_add_uint_format_value(sod_tree, hf_oss_ssdo_sod_subindex, new_tvb, ctr + 2, 1,
|
|
ssdoSubIndex, "0x%02X (%s)", ssdoSubIndex,
|
|
val_to_str_ext_const(((guint32) (ssdoIndex << 16) + ssdoSubIndex),
|
|
&opensafety_sod_idx_names_ext, "Unknown") );
|
|
}
|
|
else
|
|
proto_tree_add_uint_format_value(sod_tree, hf_oss_ssdo_sod_subindex, new_tvb, ctr + 2, 1,
|
|
ssdoSubIndex, "0x%02X", ssdoSubIndex );
|
|
ctr += 2;
|
|
|
|
/* reading real size */
|
|
sodLength = tvb_get_letohl ( new_tvb, ctr + 1 );
|
|
if ( sodLength > (dataLength - ctr) )
|
|
sodLength = 0;
|
|
|
|
if ( ( sodLength + 4 + ctr ) > dataLength )
|
|
break;
|
|
|
|
if ( ssdoIndex == OPENSAFETY_SOD_DVI && ssdoSubIndex == 0x06 )
|
|
{
|
|
entry = tvb_get_letohl ( new_tvb, ctr + 5 );
|
|
proto_tree_add_uint_format_value ( sod_tree, hf_oss_sod_par_timestamp, new_tvb, ctr + 5,
|
|
4, entry, "0x%08X", entry );
|
|
|
|
/* This is to avoid a compiler loop optimization warning */
|
|
nCRCs = sodLength / 4;
|
|
for ( n = 1; n < nCRCs; n++ )
|
|
{
|
|
entry = tvb_get_letohl ( new_tvb, ctr + 5 + ( n * 4 ) );
|
|
proto_tree_add_uint_format_value ( sod_tree, hf_oss_sod_par_checksum, new_tvb,
|
|
(ctr + 5 + ( n * 4 ) ), 4, entry, "[#%d] 0x%08X", n, entry );
|
|
}
|
|
} else if ( ssdoIndex == OPENSAFETY_SOD_DVI && ssdoSubIndex == 0x07 ) {
|
|
entry = tvb_get_letohl ( new_tvb, ctr + 5 );
|
|
proto_tree_add_uint_format_value ( sod_tree, hf_oss_sod_par_timestamp, new_tvb, ctr + 5,
|
|
4, entry, "0x%08X", entry );
|
|
} else if ( ( dispSSDOIndex == OPENSAFETY_SOD_RXMAP || dispSSDOIndex == OPENSAFETY_SOD_TXMAP ) && ssdoSubIndex != 0x0 ) {
|
|
proto_tree_add_uint(sod_tree, hf_oss_ssdo_sodentry_size, new_tvb, ctr + 1, 4, sodLength );
|
|
item = proto_tree_add_item(sod_tree, hf_oss_ssdo_sodmapping, new_tvb, ctr + 5, sodLength, ENC_NA );
|
|
ext_tree = proto_item_add_subtree(item, ett_opensafety_sod_mapping);
|
|
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_sodmapping_bits, new_tvb, ctr + 5, 1, ENC_NA);
|
|
|
|
entry = tvb_get_letohl ( new_tvb, ctr + 7 );
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_sod_index, new_tvb, ctr + 7, 2, entry);
|
|
proto_tree_add_item(ext_tree, hf_oss_ssdo_sod_subindex, new_tvb, ctr + 6, 1, ENC_NA);
|
|
|
|
} else {
|
|
proto_tree_add_uint(sod_tree, hf_oss_ssdo_sodentry_size, new_tvb, ctr + 1, 4, sodLength );
|
|
if ( sodLength > 0 )
|
|
proto_tree_add_item(sod_tree, hf_oss_ssdo_sodentry_data, new_tvb, ctr + 5, sodLength, ENC_NA );
|
|
}
|
|
ctr += sodLength + 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
|
|
static void
|
|
dissect_opensafety_ssdo_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *opensafety_tree,
|
|
opensafety_packet_info * packet)
|
|
{
|
|
proto_item *item;
|
|
proto_tree *ssdo_tree, *ssdo_payload;
|
|
guint16 taddr = 0, sdn = 0, server = 0, client = 0, n = 0, ct = 0;
|
|
guint32 abortcode, ssdoIndex = 0, ssdoSubIndex = 0, payloadSize, fragmentId = 0, entry = 0;
|
|
guint8 db0Offset, db0, payloadOffset, preload;
|
|
guint dataLength;
|
|
gint calcDataLength;
|
|
gboolean isResponse, saveFragmented;
|
|
tvbuff_t *new_tvb = NULL;
|
|
fragment_head *frag_msg = NULL;
|
|
|
|
static const int * ssdo_sacmd_flags[] = {
|
|
&hf_oss_ssdo_sacmd_end_segment,
|
|
&hf_oss_ssdo_sacmd_initiate,
|
|
&hf_oss_ssdo_sacmd_toggle,
|
|
&hf_oss_ssdo_sacmd_segmentation,
|
|
&hf_oss_ssdo_sacmd_abort_transfer,
|
|
&hf_oss_ssdo_sacmd_preload,
|
|
&hf_oss_ssdo_sacmd_access_type,
|
|
NULL
|
|
};
|
|
|
|
dataLength = tvb_get_guint8(message_tvb, OSS_FRAME_POS_LEN + packet->frame.subframe1);
|
|
|
|
db0Offset = packet->frame.subframe1 + OSS_FRAME_POS_DATA;
|
|
db0 = tvb_get_guint8(message_tvb, db0Offset);
|
|
ssdoIndex = 0;
|
|
ssdoSubIndex = 0;
|
|
|
|
/* Response is determined by the openSAFETY message field */
|
|
isResponse = ( ( OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) & 0x04 ) == 0x04 );
|
|
|
|
if ( packet->scm_udid_valid )
|
|
{
|
|
/* taddr is the 4th octet in the second frame */
|
|
taddr = OSS_FRAME_ADDR_T2(message_tvb, packet->frame.subframe2 + 3, packet->scm_udid[3], packet->scm_udid[4]);
|
|
sdn = ( OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1) ^
|
|
( OSS_FRAME_ADDR_T2(message_tvb, packet->frame.subframe2, packet->scm_udid[0], packet->scm_udid[1]) ) );
|
|
|
|
opensafety_packet_sendreceiv ( message_tvb, pinfo, opensafety_tree, packet, taddr,
|
|
packet->frame.subframe2 + 3, OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1),
|
|
packet->frame.subframe1, packet->frame.subframe2, sdn );
|
|
}
|
|
else if ( ! isResponse )
|
|
{
|
|
opensafety_packet_sender ( message_tvb, pinfo, opensafety_tree, packet,
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1), packet->frame.subframe1,
|
|
packet->frame.subframe2, -1 * ( ( OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1) ) ^
|
|
( OSS_FRAME_ADDR_T2(message_tvb, packet->frame.subframe2, packet->scm_udid[0], packet->scm_udid[1]) ) ) );
|
|
}
|
|
else if ( isResponse )
|
|
{
|
|
opensafety_packet_receiver ( message_tvb, pinfo, opensafety_tree, packet,
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1), packet->frame.subframe1,
|
|
packet->frame.subframe2, -1 * ( ( OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1) ) ^
|
|
( OSS_FRAME_ADDR_T2(message_tvb, packet->frame.subframe2, packet->scm_udid[0], packet->scm_udid[1]) ) ) );
|
|
}
|
|
|
|
ssdo_tree = opensafety_packet_payloadtree ( message_tvb, opensafety_tree, packet, ett_opensafety_ssdo );
|
|
|
|
opensafety_packet_response ( message_tvb, ssdo_tree, packet, isResponse );
|
|
|
|
packet->payload.ssdo->sacmd.toggle = ( db0 & OPENSAFETY_SSDO_SACMD_TGL ) == OPENSAFETY_SSDO_SACMD_TGL;
|
|
packet->payload.ssdo->sacmd.abort_transfer = ( db0 & OPENSAFETY_SSDO_SACMD_ABRT ) == OPENSAFETY_SSDO_SACMD_ABRT;
|
|
packet->payload.ssdo->sacmd.preload = ( db0 & OPENSAFETY_SSDO_SACMD_PRLD ) == OPENSAFETY_SSDO_SACMD_PRLD;
|
|
packet->payload.ssdo->sacmd.read_access = ( db0 & OPENSAFETY_SSDO_DOWNLOAD ) == OPENSAFETY_SSDO_DOWNLOAD;
|
|
packet->payload.ssdo->sacmd.initiate = ( db0 & OPENSAFETY_SSDO_SACMD_INI ) == OPENSAFETY_SSDO_SACMD_INI;
|
|
packet->payload.ssdo->sacmd.segmented = ( db0 & OPENSAFETY_SSDO_SACMD_SEG ) == OPENSAFETY_SSDO_SACMD_SEG;
|
|
packet->payload.ssdo->sacmd.end_segment = ( db0 & OPENSAFETY_SSDO_SACMD_ENSG ) == OPENSAFETY_SSDO_SACMD_ENSG;
|
|
|
|
if ( isResponse )
|
|
{
|
|
opensafety_packet_node ( message_tvb, pinfo, ssdo_tree, hf_oss_ssdo_client,
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1),
|
|
packet->frame.subframe1, packet->frame.subframe2, sdn );
|
|
client = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1);
|
|
|
|
if ( packet->scm_udid_valid )
|
|
{
|
|
proto_tree_add_uint(ssdo_tree, hf_oss_ssdo_server, message_tvb, packet->frame.subframe2 + 3, 2, taddr);
|
|
server = taddr;
|
|
}
|
|
}
|
|
else if ( ! isResponse )
|
|
{
|
|
proto_tree_add_uint(ssdo_tree, hf_oss_ssdo_server, message_tvb, packet->frame.subframe1, 2, OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1));
|
|
server = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1);
|
|
if ( packet->scm_udid_valid )
|
|
{
|
|
opensafety_packet_node ( message_tvb, pinfo, ssdo_tree, hf_oss_ssdo_client,
|
|
taddr, packet->frame.subframe2 + 3, packet->frame.subframe2, sdn );
|
|
client = taddr;
|
|
}
|
|
}
|
|
|
|
/* Toggle bit must be removed, otherwise the values cannot be displayed correctly */
|
|
if ( packet->payload.ssdo->sacmd.toggle )
|
|
db0 &= (~OPENSAFETY_SSDO_SACMD_TGL);
|
|
proto_tree_add_bitmask(ssdo_tree, message_tvb, db0Offset, hf_oss_ssdo_sacmd,
|
|
ett_opensafety_ssdo_sacmd, ssdo_sacmd_flags, ENC_NA);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", SACMD: %s", val_to_str_const(db0, opensafety_ssdo_sacmd_values, " "));
|
|
|
|
payloadOffset = db0Offset + 1;
|
|
|
|
ct = tvb_get_guint8(message_tvb, packet->frame.subframe1 + 3);
|
|
if ( packet->scm_udid_valid )
|
|
{
|
|
ct = (guint16)((tvb_get_guint8(message_tvb, packet->frame.subframe2 + 2) ^ packet->scm_udid[2]) << 8);
|
|
ct += (tvb_get_guint8(message_tvb, packet->frame.subframe1 + 3));
|
|
}
|
|
|
|
proto_tree_add_uint(ssdo_tree, hf_oss_ssdo_sano, message_tvb, packet->frame.subframe1 + 3, 1, ct );
|
|
|
|
/* Evaluate preload field [field TR] */
|
|
if ( packet->scm_udid_valid && packet->payload.ssdo->sacmd.preload && isResponse )
|
|
{
|
|
/* Preload info are the higher 6 bit of the TR field */
|
|
preload = ( (tvb_get_guint8(message_tvb, packet->frame.subframe2 + 4) ^ packet->scm_udid[4]) & 0xFC ) >> 2;
|
|
|
|
if ( packet->payload.ssdo->sacmd.initiate )
|
|
{
|
|
/* Use the lower 4 bits from the preload as size */
|
|
proto_tree_add_uint_format_value(ssdo_tree, hf_oss_ssdo_preload_queue, message_tvb, packet->frame.subframe2 + 4, 1,
|
|
preload & 0x0F, "%d", preload & 0x0F );
|
|
}
|
|
else
|
|
{
|
|
/* The highest 2 bits of information contain an error flag */
|
|
item = proto_tree_add_item(ssdo_tree, hf_oss_ssdo_preload_error, message_tvb, packet->frame.subframe2 + 4, 1, ENC_NA );
|
|
if ( (preload & 0x30) == 0x30 )
|
|
proto_item_append_text(item, " (SOD Access Request Number is last successful)" );
|
|
}
|
|
}
|
|
|
|
/* When the following clause is met, DB1,2 contain the SOD index, and DB3 the SOD subindex */
|
|
if ( packet->payload.ssdo->sacmd.initiate && !packet->payload.ssdo->sacmd.abort_transfer )
|
|
{
|
|
ssdoIndex = tvb_get_letohs(message_tvb, db0Offset + 1);
|
|
ssdoSubIndex = tvb_get_guint8(message_tvb, db0Offset + 3);
|
|
|
|
proto_tree_add_uint_format_value(ssdo_tree, hf_oss_ssdo_sod_index, message_tvb, db0Offset + 1, 2,
|
|
ssdoIndex, "0x%04X (%s)", ssdoIndex,
|
|
val_to_str_ext_const(((guint32) (ssdoIndex << 16)), &opensafety_sod_idx_names_ext, "Unknown") );
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " [%s", val_to_str_ext_const(((guint32) (ssdoIndex << 16)), &opensafety_sod_idx_names_ext, "Unknown"));
|
|
|
|
/* Some SOD downloads (0x101A for instance) don't have sub-indeces */
|
|
if ( ssdoSubIndex != 0x0 )
|
|
{
|
|
proto_tree_add_uint_format_value(ssdo_tree, hf_oss_ssdo_sod_subindex, message_tvb, db0Offset + 3, 1,
|
|
ssdoSubIndex, "0x%02X (%s)", ssdoSubIndex,
|
|
val_to_str_ext_const(((guint32) (ssdoIndex << 16) + ssdoSubIndex), &opensafety_sod_idx_names_ext, "Unknown") );
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " - %s",
|
|
val_to_str_ext_const(((guint32) (ssdoIndex << 16) + ssdoSubIndex), &opensafety_sod_idx_names_ext, "Unknown"));
|
|
}
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%s", "]" );
|
|
payloadOffset += 3;
|
|
}
|
|
|
|
if ( packet->payload.ssdo->sacmd.abort_transfer )
|
|
{
|
|
abortcode = tvb_get_letohl(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 4);
|
|
|
|
proto_tree_add_uint_format_value(ssdo_tree, hf_oss_ssdo_abort_code, message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 4, 4, abortcode,
|
|
"0x%04X %04X - %s", (guint16)(abortcode >> 16), (guint16)(abortcode),
|
|
val_to_str_ext_const(abortcode, &opensafety_abort_codes_ext, "Unknown"));
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " - %s", val_to_str_ext_const(abortcode, &opensafety_abort_codes_ext, "Unknown"));
|
|
|
|
|
|
} else {
|
|
/* Either the SSDO msg is a response, then data is sent by the server and only in uploads,
|
|
* or the message is a request, then data is coming from the client and payload data is
|
|
* sent in downloads. Data is only sent in initiate, segmented or end-segment messages */
|
|
if ( ( packet->payload.ssdo->sacmd.initiate || packet->payload.ssdo->sacmd.segmented || packet->payload.ssdo->sacmd.end_segment ) &&
|
|
( ( isResponse && !packet->payload.ssdo->sacmd.read_access ) ||
|
|
( !isResponse && packet->payload.ssdo->sacmd.read_access ) ) )
|
|
{
|
|
saveFragmented = pinfo->fragmented;
|
|
if ( server != 0 && client != 0 )
|
|
fragmentId = (guint32)((((guint32)client) << 16 ) + server );
|
|
|
|
/* If payload data has to be calculated, either a total size is given, or not */
|
|
if ( packet->payload.ssdo->sacmd.segmented && packet->payload.ssdo->sacmd.initiate )
|
|
{
|
|
|
|
payloadOffset += 4;
|
|
|
|
/* reading real size */
|
|
payloadSize = tvb_get_letohl(message_tvb, payloadOffset - 4);
|
|
|
|
calcDataLength = dataLength - (payloadOffset - db0Offset);
|
|
|
|
item = proto_tree_add_uint_format_value(ssdo_tree, hf_oss_ssdo_payload_size, message_tvb, payloadOffset - 4, 4,
|
|
payloadSize, "%d octets total (%d octets in this frame)", payloadSize, calcDataLength);
|
|
|
|
if ( fragmentId != 0 && packet->payload.ssdo->sacmd.segmented )
|
|
{
|
|
pinfo->fragmented = TRUE;
|
|
frag_msg = fragment_add_seq_check(&os_reassembly_table, message_tvb, payloadOffset, pinfo,
|
|
fragmentId, NULL, 0, calcDataLength, TRUE );
|
|
fragment_add_seq_offset ( &os_reassembly_table, pinfo, fragmentId, NULL, ct );
|
|
|
|
if ( frag_msg != NULL )
|
|
{
|
|
item = proto_tree_add_bytes_format_value(ssdo_tree, hf_oss_ssdo_payload, message_tvb, 0, 0, NULL, "Reassembled" );
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
ssdo_payload = proto_item_add_subtree(item, ett_opensafety_ssdo_payload);
|
|
process_reassembled_data(message_tvb, 0, pinfo, "Reassembled Message", frag_msg, &oss_frag_items, NULL, ssdo_payload );
|
|
}
|
|
}
|
|
|
|
if ( (gint) calcDataLength >= (gint) 0 )
|
|
{
|
|
proto_tree_add_item(ssdo_tree, hf_oss_ssdo_payload, message_tvb, payloadOffset, calcDataLength, ENC_NA );
|
|
} else {
|
|
expert_add_info_format(pinfo, item, &ei_payload_length_not_positive,
|
|
"Calculation for payload length yielded non-positive result [%d]", (guint) calcDataLength );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
payloadSize = dataLength - (payloadOffset - db0Offset);
|
|
|
|
if ( fragmentId != 0 && packet->payload.ssdo->sacmd.segmented )
|
|
{
|
|
pinfo->fragmented = TRUE;
|
|
|
|
frag_msg = fragment_add_seq_check(&os_reassembly_table, message_tvb, payloadOffset, pinfo,
|
|
fragmentId, NULL, ct, payloadSize,
|
|
packet->payload.ssdo->sacmd.end_segment ? FALSE : TRUE );
|
|
}
|
|
|
|
if ( frag_msg )
|
|
{
|
|
item = proto_tree_add_bytes_format_value(ssdo_tree, hf_oss_ssdo_payload, message_tvb,
|
|
0, 0, NULL, "Reassembled" );
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
ssdo_payload = proto_item_add_subtree(item, ett_opensafety_ssdo_payload);
|
|
|
|
new_tvb = process_reassembled_data(message_tvb, 0, pinfo, "Reassembled Message", frag_msg,
|
|
&oss_frag_items, NULL, ssdo_payload );
|
|
if ( packet->payload.ssdo->sacmd.end_segment && new_tvb )
|
|
{
|
|
item = proto_tree_add_uint_format_value(ssdo_payload, hf_oss_ssdo_payload_size, message_tvb, 0, 0,
|
|
payloadSize, "%d octets (over all fragments)", frag_msg->len);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (Message Reassembled)" );
|
|
dissect_opensafety_ssdo_payload ( pinfo, new_tvb, ssdo_payload, db0 );
|
|
}
|
|
}
|
|
else
|
|
{
|
|
item = proto_tree_add_uint_format_value(ssdo_tree, hf_oss_ssdo_payload_size, message_tvb, 0, 0, payloadSize,
|
|
"%d octets", payloadSize);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
if ( ssdoIndex == OPENSAFETY_SOD_DVI && ssdoSubIndex == 0x06 )
|
|
{
|
|
entry = tvb_get_letohl ( message_tvb, payloadOffset );
|
|
proto_tree_add_uint_format_value ( ssdo_tree, hf_oss_sod_par_timestamp, message_tvb, payloadOffset,
|
|
4, entry, "0x%08X", entry );
|
|
for ( n = 4; n < payloadSize; n+=4 )
|
|
{
|
|
entry = tvb_get_letohl ( message_tvb, payloadOffset + n );
|
|
proto_tree_add_uint_format_value ( ssdo_tree, hf_oss_sod_par_checksum, message_tvb, (payloadOffset + n ),
|
|
4, entry, "[#%d] 0x%08X", ( n / 4 ), entry );
|
|
}
|
|
} else if ( ssdoIndex == OPENSAFETY_SOD_DVI && ssdoSubIndex == 0x07 ) {
|
|
entry = tvb_get_letohl ( message_tvb, payloadOffset );
|
|
proto_tree_add_uint_format_value ( ssdo_tree, hf_oss_sod_par_timestamp, message_tvb, payloadOffset,
|
|
4, entry, "0x%08X", entry );
|
|
} else
|
|
proto_tree_add_item(ssdo_tree, hf_oss_ssdo_payload, message_tvb, payloadOffset, payloadSize, ENC_NA );
|
|
}
|
|
}
|
|
|
|
pinfo->fragmented = saveFragmented;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_opensafety_snmt_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *opensafety_tree,
|
|
opensafety_packet_info *packet )
|
|
{
|
|
proto_item *item;
|
|
proto_tree *snmt_tree;
|
|
guint32 entry = 0;
|
|
guint16 addr, taddr, sdn;
|
|
guint8 db0, byte, errcode;
|
|
guint dataLength;
|
|
|
|
dataLength = OSS_FRAME_LENGTH_T(message_tvb, packet->frame.subframe1);
|
|
|
|
/* addr is the first field, as well as the recipient of the message */
|
|
addr = packet->saddr;
|
|
|
|
/* taddr is the 4th octet in the second frame */
|
|
taddr = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe2 + 3);
|
|
/* domain is xor'ed on the first field in the second frame. As this is also addr, it is easy to obtain */
|
|
sdn = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe2) ^ addr;
|
|
packet->sdn = sdn;
|
|
|
|
db0 = -1;
|
|
if (dataLength > 0)
|
|
db0 = tvb_get_guint8(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA);
|
|
|
|
packet->msg_id = OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1);
|
|
|
|
if ( ( packet->msg_id == OPENSAFETY_MSG_SNMT_SERVICE_RESPONSE ) &&
|
|
( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SCM_SET_TO_STOP) == 0 ||
|
|
(db0 ^ OPENSAFETY_MSG_SNMT_EXT_SCM_SET_TO_OP) == 0 ) )
|
|
{
|
|
opensafety_packet_receiver( message_tvb, pinfo, opensafety_tree, packet, addr,
|
|
OSS_FRAME_POS_ADDR + packet->frame.subframe1, packet->frame.subframe2, sdn );
|
|
}
|
|
else
|
|
{
|
|
opensafety_packet_sendreceiv ( message_tvb, pinfo, opensafety_tree, packet, taddr, packet->frame.subframe2 + 3,
|
|
addr, OSS_FRAME_POS_ADDR + packet->frame.subframe1, packet->frame.subframe2, sdn );
|
|
}
|
|
|
|
snmt_tree = opensafety_packet_payloadtree ( message_tvb, opensafety_tree, packet, ett_opensafety_snmt );
|
|
/* Just a precaution, cause payloadtree actually sets the snmt pointer */
|
|
if ( packet->payload.snmt == NULL )
|
|
return;
|
|
|
|
if ( ( packet->msg_id == OPENSAFETY_MSG_SNMT_SERVICE_RESPONSE ) ||
|
|
( packet->msg_id == OPENSAFETY_MSG_SNMT_SERVICE_REQUEST ) )
|
|
packet->payload.snmt->ext_msg_id = db0;
|
|
|
|
opensafety_packet_response(message_tvb, snmt_tree, packet, ( packet->msg_id & 0x04 ) == 0x04 );
|
|
|
|
if ( packet->is_request )
|
|
{
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_master, message_tvb, packet->frame.subframe2 + 3, 2, taddr);
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_slave, message_tvb, OSS_FRAME_POS_ADDR + packet->frame.subframe1, 2, addr);
|
|
}
|
|
else
|
|
{
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_master, message_tvb, OSS_FRAME_POS_ADDR + packet->frame.subframe1, 2, addr);
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_slave, message_tvb, packet->frame.subframe2 + 3, 2, taddr);
|
|
}
|
|
|
|
if ( (OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) ^ OPENSAFETY_MSG_SNMT_SERVICE_RESPONSE) == 0 )
|
|
{
|
|
byte = tvb_get_guint8(message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1);
|
|
|
|
if ( ! ( (packet->payload.snmt->ext_msg_id ^ OPENSAFETY_MSG_SNMT_EXT_SN_FAIL) == 0 &&
|
|
byte == OPENSAFETY_ERROR_GROUP_ADD_PARAMETER ) )
|
|
{
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_service_id, message_tvb,
|
|
OSS_FRAME_POS_DATA + packet->frame.subframe1, 1, packet->payload.snmt->ext_msg_id);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",
|
|
val_to_str_const(packet->payload.snmt->ext_msg_id, opensafety_message_service_type, "Unknown"));
|
|
}
|
|
else
|
|
{
|
|
proto_tree_add_uint_format_value(snmt_tree, hf_oss_snmt_service_id, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1, 1,
|
|
packet->payload.snmt->ext_msg_id, "%s [Request via SN Fail] (0x%02X)",
|
|
val_to_str_const(byte, opensafety_sn_fail_error_group, "Unknown"), packet->payload.snmt->ext_msg_id);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", val_to_str_const(byte, opensafety_sn_fail_error_group, "Unknown"));
|
|
}
|
|
|
|
if ( (packet->payload.snmt->ext_msg_id ^ OPENSAFETY_MSG_SNMT_EXT_SN_FAIL) == 0 )
|
|
{
|
|
/* Handle a normal SN Fail */
|
|
if ( byte != OPENSAFETY_ERROR_GROUP_ADD_PARAMETER )
|
|
{
|
|
proto_tree_add_uint_format_value(snmt_tree, hf_oss_snmt_error_group, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 1,
|
|
byte, "%s", ( byte == 0 ? "Device" : val_to_str(byte, opensafety_sn_fail_error_group, "Reserved [%d]" ) ) );
|
|
|
|
errcode = tvb_get_guint8(message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 2);
|
|
proto_tree_add_uint_format_value(snmt_tree, hf_oss_snmt_error_code, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 2, 1,
|
|
errcode, "%s [%d]", ( errcode == 0 ? "Default" : "Vendor Specific" ), errcode );
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " - Group: %s; Code: %s",
|
|
( byte == 0 ? "Device" : val_to_str(byte, opensafety_sn_fail_error_group, "Reserved [%d]" ) ),
|
|
( errcode == 0 ? "Default" : "Vendor Specific" )
|
|
);
|
|
|
|
packet->payload.snmt->add_param.exists = FALSE;
|
|
packet->payload.snmt->error_code = errcode;
|
|
}
|
|
else
|
|
{
|
|
errcode = tvb_get_guint8(message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 2);
|
|
packet->payload.snmt->add_param.exists = TRUE;
|
|
packet->payload.snmt->add_param.id = errcode;
|
|
packet->payload.snmt->add_param.set = ( errcode & 0x0F ) + 1;
|
|
packet->payload.snmt->add_param.full = ( ( errcode & 0xF0 ) == 0xF0 );
|
|
|
|
/* Handle an additional parameter request */
|
|
proto_tree_add_uint(snmt_tree, hf_oss_ssdo_extpar_parset, message_tvb,
|
|
OSS_FRAME_POS_DATA + packet->frame.subframe1 + 2, 1, ( errcode & 0x0F ) + 1 );
|
|
|
|
proto_tree_add_boolean(snmt_tree, hf_oss_snmt_param_type, message_tvb,
|
|
OSS_FRAME_POS_DATA + packet->frame.subframe1 + 2, 1, ( ( errcode & 0xF0 ) != 0xF0 ) );
|
|
}
|
|
}
|
|
else if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_ASSIGNED_UDID_SCM) == 0 )
|
|
{
|
|
item = proto_tree_add_item(snmt_tree, hf_oss_snmt_udid, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 6, ENC_NA);
|
|
|
|
if ( global_scm_udid_autoset == TRUE )
|
|
{
|
|
packet->payload.snmt->scm_udid = wmem_strdup(wmem_packet_scope(),
|
|
tvb_bytes_to_str_punct(wmem_packet_scope(),
|
|
message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 6, ':' ) );
|
|
if ( memcmp ( global_scm_udid, packet->payload.snmt->scm_udid, 17 ) != 0 )
|
|
{
|
|
local_scm_udid = wmem_strdup(wmem_file_scope(), packet->payload.snmt->scm_udid );
|
|
expert_add_info_format(pinfo, item, &ei_scmudid_autodetected,
|
|
"Auto detected payload as SCM UDID [%s].", packet->payload.snmt->scm_udid);
|
|
}
|
|
}
|
|
|
|
}
|
|
else if ( ( db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_ASSIGNED_ADDITIONAL_SADR) == 0 )
|
|
{
|
|
packet->payload.snmt->add_saddr.actual = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1);
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_ext_addsaddr, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 2,
|
|
packet->payload.snmt->add_saddr.actual );
|
|
|
|
packet->payload.snmt->add_saddr.additional = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 3);
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_ext_addtxspdo, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 3, 2,
|
|
packet->payload.snmt->add_saddr.additional);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " [0x%04X => 0x%04X]",
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1),
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 3));
|
|
}
|
|
else if ( ( db0 ^ OPENSAFETY_MSG_SNMT_EXT_ASSIGNED_INIT_CT) == 0 )
|
|
{
|
|
packet->payload.snmt->init_ct =
|
|
tvb_get_guint40(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(snmt_tree, hf_oss_snmt_ext_initct, message_tvb,
|
|
packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1, 5, ENC_BIG_ENDIAN );
|
|
}
|
|
}
|
|
else if ( (OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) ^ OPENSAFETY_MSG_SNMT_SERVICE_REQUEST) == 0 )
|
|
{
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_service_id, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1, 1, db0);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", val_to_str_const(db0, opensafety_message_service_type, "Unknown"));
|
|
|
|
packet->payload.snmt->ext_msg_id = db0;
|
|
|
|
if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SCM_SET_TO_STOP) == 0 || (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SCM_SET_TO_OP) == 0 )
|
|
{
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_scm, message_tvb, OSS_FRAME_POS_ADDR + packet->frame.subframe1, 2, addr);
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_tool, message_tvb, packet->frame.subframe2 + 3, 2, taddr);
|
|
}
|
|
else if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_ASSIGN_UDID_SCM) == 0 )
|
|
{
|
|
item = proto_tree_add_item(snmt_tree, hf_oss_snmt_udid, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 6, ENC_NA);
|
|
packet->payload.snmt->scm_udid = wmem_strdup(wmem_packet_scope(),
|
|
tvb_bytes_to_str_punct(wmem_packet_scope(), message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 6, ':' ) );
|
|
|
|
if ( ( global_scm_udid_autoset == TRUE ) && ( memcmp ( global_scm_udid, packet->payload.snmt->scm_udid, 17 ) != 0 ) )
|
|
{
|
|
local_scm_udid = wmem_strdup(wmem_file_scope(), packet->payload.snmt->scm_udid );
|
|
expert_add_info_format(pinfo, item, &ei_scmudid_autodetected,
|
|
"Auto detected payload as SCM UDID [%s].", packet->payload.snmt->scm_udid);
|
|
}
|
|
|
|
}
|
|
else if ( ( db0 ^ OPENSAFETY_MSG_SNMT_EXT_ASSIGN_INIT_CT) == 0 )
|
|
{
|
|
packet->payload.snmt->init_ct =
|
|
tvb_get_guint40(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(snmt_tree, hf_oss_snmt_ext_initct, message_tvb,
|
|
packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1, 5, ENC_BIG_ENDIAN );
|
|
}
|
|
else
|
|
{
|
|
if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_SET_TO_OP) == 0 )
|
|
{
|
|
entry = tvb_get_letohl ( message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1 );
|
|
proto_tree_add_uint_format_value ( snmt_tree, hf_oss_sod_par_timestamp, message_tvb,
|
|
OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 4, entry, "0x%08X", entry );
|
|
}
|
|
else if ( ( db0 ^ OPENSAFETY_MSG_SNMT_EXT_ASSIGN_ADDITIONAL_SADR) == 0 )
|
|
{
|
|
packet->payload.snmt->add_saddr.actual = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1);
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_ext_addsaddr, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 2,
|
|
packet->payload.snmt->add_saddr.actual );
|
|
|
|
packet->payload.snmt->add_saddr.additional = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 3);
|
|
proto_tree_add_uint(snmt_tree, hf_oss_snmt_ext_addtxspdo, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 3, 2,
|
|
packet->payload.snmt->add_saddr.additional);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " [0x%04X => 0x%04X]",
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 1),
|
|
OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1 + OSS_FRAME_POS_DATA + 3));
|
|
}
|
|
|
|
}
|
|
}
|
|
else if ( (OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) ^ OPENSAFETY_MSG_SNMT_SADR_ASSIGNED) == 0 ||
|
|
(OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) ^ OPENSAFETY_MSG_SNMT_ASSIGN_SADR) == 0 ||
|
|
(OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) ^ OPENSAFETY_MSG_SNMT_RESPONSE_UDID) == 0 )
|
|
{
|
|
if (dataLength > 0)
|
|
{
|
|
packet->payload.snmt->sn_udid = wmem_strdup(wmem_packet_scope(),
|
|
tvb_bytes_to_str_punct(wmem_packet_scope(), message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 6, ':' ) );
|
|
proto_tree_add_item(snmt_tree, hf_oss_snmt_udid, message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1, 6, ENC_NA);
|
|
}
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_checksum(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *opensafety_tree,
|
|
opensafety_packet_info *packet )
|
|
{
|
|
guint16 frame1_crc, frame2_crc;
|
|
guint16 calc1_crc, calc2_crc;
|
|
guint dataLength, frame2Length;
|
|
guint8 *bytesf2, *bytesf1, ctr = 0, crcType = OPENSAFETY_CHECKSUM_CRC8;
|
|
proto_item *item;
|
|
proto_tree *checksum_tree;
|
|
gint start;
|
|
gint length;
|
|
gboolean isSlim = FALSE;
|
|
gboolean isSNMT = FALSE;
|
|
gboolean isSPDO = FALSE;
|
|
GByteArray *scmUDID = NULL;
|
|
|
|
dataLength = OSS_FRAME_LENGTH_T(message_tvb, packet->frame.subframe1);
|
|
start = OSS_FRAME_POS_DATA + dataLength + packet->frame.subframe1;
|
|
|
|
if (OSS_FRAME_LENGTH_T(message_tvb, packet->frame.subframe1) > OSS_PAYLOAD_MAXSIZE_FOR_CRC8)
|
|
frame1_crc = tvb_get_letohs(message_tvb, start);
|
|
else
|
|
frame1_crc = tvb_get_guint8(message_tvb, start);
|
|
|
|
if ( packet->msg_type == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE )
|
|
isSlim = TRUE;
|
|
if ( packet->msg_type == OPENSAFETY_SNMT_MESSAGE_TYPE )
|
|
isSNMT = TRUE;
|
|
if ( packet->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
isSPDO = TRUE;
|
|
|
|
frame2Length = (isSlim ? 0 : dataLength) + 5;
|
|
|
|
length = (dataLength > OSS_PAYLOAD_MAXSIZE_FOR_CRC8 ? OPENSAFETY_CHECKSUM_CRC16 : OPENSAFETY_CHECKSUM_CRC8);
|
|
item = proto_tree_add_uint_format(opensafety_tree, hf_oss_crc, message_tvb, start, length, frame1_crc,
|
|
"CRC for subframe #1: 0x%04X", frame1_crc);
|
|
|
|
checksum_tree = proto_item_add_subtree(item, ett_opensafety_checksum);
|
|
|
|
bytesf1 = (guint8*)tvb_memdup(wmem_packet_scope(), message_tvb, packet->frame.subframe1, dataLength + 4);
|
|
|
|
crcType = packet->crc.type;
|
|
calc1_crc = packet->crc.frame1;
|
|
|
|
if ( ! isSlim && crcType == OPENSAFETY_CHECKSUM_CRC16SLIM )
|
|
expert_add_info(pinfo, item, &ei_crc_slimssdo_instead_of_spdo );
|
|
|
|
item = proto_tree_add_boolean(checksum_tree, hf_oss_crc_valid, message_tvb,
|
|
packet->frame.subframe1, dataLength + 4, (frame1_crc == calc1_crc));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
if ( crcType == OPENSAFETY_CHECKSUM_INVALID || frame1_crc != calc1_crc )
|
|
expert_add_info(pinfo, item, &ei_crc_frame_1_invalid );
|
|
|
|
/* using the defines, as the values can change */
|
|
proto_tree_add_uint(checksum_tree, hf_oss_crc_type, message_tvb, start, length, crcType );
|
|
|
|
start = packet->frame.subframe2 + (isSlim ? 5 : dataLength + OSS_FRAME_POS_DATA + 1 );
|
|
if (OSS_FRAME_LENGTH_T(message_tvb, packet->frame.subframe1) > OSS_PAYLOAD_MAXSIZE_FOR_CRC8)
|
|
frame2_crc = tvb_get_letohs(message_tvb, start);
|
|
else
|
|
frame2_crc = tvb_get_guint8(message_tvb, start);
|
|
|
|
/* 0xFFFF is an invalid CRC16 value, therefore valid for initialization. Needed, because
|
|
* otherwise this function may return without setting calc2_crc, and this does not go well
|
|
* with the compiler */
|
|
calc2_crc = 0xFFFF;
|
|
|
|
/* Currently SPDO 40 Bit CRC2 support is broken. Will be implemented at a later state, after
|
|
* the first generation of openSAFETY devices using 40 bit counter are available */
|
|
if ( isSPDO && packet->payload.spdo->flags.enabled40bit == TRUE )
|
|
packet->scm_udid_valid = FALSE;
|
|
|
|
/* This used to be an option. But only, because otherwise there would be three different
|
|
* crc calculations taking place within dissection. As we could reduce this by one, the
|
|
* global option has been changed to the simple validity question, if we have enough information
|
|
* to calculate the second crc, meaning, if the SCM udid is known, or if we have an SNMT msg */
|
|
if ( isSNMT || packet->scm_udid_valid )
|
|
{
|
|
bytesf2 = (guint8*)tvb_memdup(wmem_packet_scope(), message_tvb, packet->frame.subframe2, frame2Length + length);
|
|
|
|
/* SLIM SSDO messages, do not contain a payload in frame2 */
|
|
if ( isSlim == TRUE )
|
|
dataLength = 0;
|
|
|
|
scmUDID = g_byte_array_new();
|
|
packet->crc.valid2 = FALSE;
|
|
if ( isSNMT || ( hex_str_to_bytes((local_scm_udid != NULL ? local_scm_udid : global_scm_udid), scmUDID, TRUE) && scmUDID->len == 6 ) )
|
|
{
|
|
if ( !isSNMT )
|
|
{
|
|
for ( ctr = 0; ctr < 6; ctr++ )
|
|
bytesf2[ctr] = bytesf2[ctr] ^ (guint8)(scmUDID->data[ctr]);
|
|
if ( isSPDO )
|
|
{
|
|
|
|
/* allow only valid SPDO flags */
|
|
if ( packet->msg_id == OPENSAFETY_MSG_SPDO_DATA_ONLY )
|
|
{
|
|
if ( packet->payload.spdo->flags.enabled40bit == TRUE )
|
|
{
|
|
/* we assume the OPENSAFETY_DEFAULT_DOMAIN (0x01) for 40 bit for now */
|
|
bytesf2[0] = bytesf2[0] ^ (bytesf2[0] ^ OPENSAFETY_DEFAULT_DOMAIN ^ bytesf1[0]);
|
|
bytesf2[1] = bytesf2[1] ^ (bytesf2[1] ^ bytesf1[1]);
|
|
bytesf2[3] = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( isSlim || packet->frame.length == 11 )
|
|
frame2_crc ^= ((guint8)scmUDID->data[5]);
|
|
|
|
/*
|
|
* If the second frame is 6 or 7 (slim) bytes in length, we have to decode the found
|
|
* frame crc again. This must be done using the byte array, as the unxor operation
|
|
* had to take place.
|
|
*/
|
|
if ( dataLength == 0 )
|
|
{
|
|
if ( isSlim && length == 2 )
|
|
frame2_crc = ( bytesf2[6] << 8 ) + bytesf2[5];
|
|
}
|
|
|
|
}
|
|
|
|
item = proto_tree_add_uint_format(opensafety_tree, hf_oss_crc, message_tvb, start, length, frame2_crc,
|
|
"CRC for subframe #2: 0x%04X", frame2_crc);
|
|
|
|
checksum_tree = proto_item_add_subtree(item, ett_opensafety_checksum);
|
|
|
|
if ( OSS_FRAME_LENGTH_T(message_tvb, packet->frame.subframe1) > OSS_PAYLOAD_MAXSIZE_FOR_CRC8 )
|
|
{
|
|
calc2_crc = crc16_0x755B(bytesf2, frame2Length, 0);
|
|
if ( frame2_crc != calc2_crc )
|
|
calc2_crc = crc16_0x5935(bytesf2, frame2Length, 0);
|
|
}
|
|
else
|
|
calc2_crc = crc8_0x2F(bytesf2, frame2Length, 0);
|
|
|
|
item = proto_tree_add_boolean(checksum_tree, hf_oss_crc2_valid, message_tvb,
|
|
packet->frame.subframe2, frame2Length, (frame2_crc == calc2_crc));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
if ( frame2_crc != calc2_crc )
|
|
{
|
|
item = proto_tree_add_uint_format(checksum_tree, hf_oss_crc, message_tvb,
|
|
packet->frame.subframe2, frame2Length, calc2_crc, "Calculated CRC: 0x%04X", calc2_crc);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
expert_add_info(pinfo, item, &ei_crc_frame_2_invalid );
|
|
}
|
|
else
|
|
{
|
|
if ( isSlim || ( !isSNMT && packet->frame.length == 11 ) )
|
|
expert_add_info(pinfo, item, &ei_crc_frame_2_scm_udid_encoded );
|
|
|
|
packet->crc.valid2 = TRUE;
|
|
}
|
|
}
|
|
else
|
|
expert_add_info(pinfo, item, &ei_crc_frame_2_unknown_scm_udid );
|
|
|
|
g_byte_array_free(scmUDID, TRUE);
|
|
}
|
|
|
|
/* For a correct calculation of the second crc we need to know the scm udid.
|
|
* If the dissection of the second frame has been triggered, we integrate the
|
|
* crc for frame2 into the result */
|
|
return (gboolean) (frame1_crc == calc1_crc) &&
|
|
( ( isSNMT || packet->scm_udid_valid ) == TRUE ? (frame2_crc == calc2_crc) : TRUE);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_message(opensafety_packet_info *packet,
|
|
tvbuff_t *message_tvb, packet_info *pinfo,
|
|
proto_item *opensafety_item, proto_tree *opensafety_tree,
|
|
guint8 u_nrInPackage)
|
|
{
|
|
guint8 b_ID, ctr, spdoFlags;
|
|
GByteArray *scmUDID = NULL;
|
|
proto_item *item;
|
|
gboolean messageTypeUnknown, crcValid;
|
|
|
|
messageTypeUnknown = FALSE;
|
|
|
|
for ( ctr = 0; ctr < 6; ctr++ )
|
|
packet->scm_udid[ctr] = 0;
|
|
|
|
/* Clearing connection valid bit */
|
|
if ( packet->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
packet->msg_id = packet->msg_id & 0xF8;
|
|
|
|
packet->saddr = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1);
|
|
/* Sender / Receiver is determined by message type */
|
|
packet->sender = 0;
|
|
packet->receiver = 0;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, (u_nrInPackage > 1 ? " | %s" : "%s" ),
|
|
val_to_str(packet->msg_id, opensafety_message_type_values, "Unknown Message (0x%02X) "));
|
|
|
|
if ( packet->msg_type == OPENSAFETY_SNMT_MESSAGE_TYPE )
|
|
{
|
|
dissect_opensafety_snmt_message ( message_tvb, pinfo, opensafety_tree, packet );
|
|
}
|
|
else
|
|
{
|
|
packet->scm_udid_valid = FALSE;
|
|
scmUDID = g_byte_array_new();
|
|
|
|
if ( hex_str_to_bytes((local_scm_udid != NULL ? local_scm_udid : global_scm_udid), scmUDID, TRUE) && scmUDID->len == 6 )
|
|
{
|
|
packet->scm_udid_valid = TRUE;
|
|
|
|
/* Now confirm, that the xor operation was successful. The ID fields of both frames have to be the same */
|
|
b_ID = OSS_FRAME_ID_T(message_tvb, packet->frame.subframe2) ^ (guint8)(scmUDID->data[OSS_FRAME_POS_ID]);
|
|
|
|
if ( ( OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) ^ b_ID ) != 0 )
|
|
packet->scm_udid_valid = FALSE;
|
|
|
|
/* The IDs do not match, but the SCM UDID could still be ok. This happens, if this packet
|
|
* utilizes the 40 bit counter. Therefore we reduce the check here only to the feature
|
|
* flags, but only if the package is a SPDO Data Only (because everything else uses 16 bit. */
|
|
if ( packet->msg_id == OPENSAFETY_MSG_SPDO_DATA_ONLY )
|
|
{
|
|
spdoFlags = ( tvb_get_guint8(message_tvb, packet->frame.subframe2 + 4 ) ^ scmUDID->data[4] ) ;
|
|
spdoFlags = ( spdoFlags >> 2 ) & OPENSAFETY_SPDO_FEATURE_FLAGS;
|
|
if ( ( spdoFlags & OPENSAFETY_SPDO_FEAT_40BIT_USED ) == OPENSAFETY_SPDO_FEAT_40BIT_USED )
|
|
packet->scm_udid_valid = TRUE;
|
|
}
|
|
|
|
if ( packet->scm_udid_valid == TRUE )
|
|
memcpy(packet->scm_udid, scmUDID->data, 6);
|
|
|
|
}
|
|
|
|
if ( strlen ( (local_scm_udid != NULL ? local_scm_udid : global_scm_udid) ) > 0 && scmUDID->len == 6 )
|
|
{
|
|
if ( local_scm_udid != NULL )
|
|
{
|
|
item = proto_tree_add_string(opensafety_tree, hf_oss_scm_udid_auto, message_tvb, 0, 0, local_scm_udid);
|
|
if ( ! packet->scm_udid_valid )
|
|
expert_add_info(pinfo, item, &ei_message_id_field_mismatch );
|
|
}
|
|
else
|
|
item = proto_tree_add_string(opensafety_tree, hf_oss_scm_udid, message_tvb, 0, 0, global_scm_udid);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
|
|
item = proto_tree_add_boolean(opensafety_tree, hf_oss_scm_udid_valid, message_tvb, 0, 0, packet->scm_udid_valid);
|
|
if ( scmUDID->len != 6 )
|
|
expert_add_info(pinfo, item, &ei_scmudid_invalid_preference );
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
g_byte_array_free( scmUDID, TRUE);
|
|
|
|
if ( packet->msg_type == OPENSAFETY_SSDO_MESSAGE_TYPE || packet->msg_type == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE )
|
|
{
|
|
dissect_opensafety_ssdo_message ( message_tvb, pinfo, opensafety_tree, packet );
|
|
}
|
|
else if ( packet->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
{
|
|
dissect_opensafety_spdo_message ( message_tvb, pinfo, opensafety_tree, packet );
|
|
}
|
|
else
|
|
{
|
|
messageTypeUnknown = TRUE;
|
|
}
|
|
}
|
|
|
|
crcValid = FALSE;
|
|
item = proto_tree_add_uint(opensafety_tree, hf_oss_length,
|
|
message_tvb, OSS_FRAME_POS_LEN + packet->frame.subframe1, 1,
|
|
OSS_FRAME_LENGTH_T(message_tvb, packet->frame.subframe1));
|
|
if ( messageTypeUnknown )
|
|
{
|
|
expert_add_info(pinfo, item, &ei_message_unknown_type );
|
|
}
|
|
else
|
|
{
|
|
crcValid = dissect_opensafety_checksum ( message_tvb, pinfo, opensafety_tree, packet );
|
|
}
|
|
|
|
/* with SNMT's we can check if the ID's for the frames match. Rare randomized packages do have
|
|
* an issue, where an frame 1 can be valid. The id's for both frames must differ, as well as
|
|
* the addresses, but addresses won't be checked yet, as there are issues with SDN xored on it. */
|
|
if ( crcValid && packet->msg_type == OPENSAFETY_SNMT_MESSAGE_TYPE )
|
|
{
|
|
if ( OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) != OSS_FRAME_ID_T(message_tvb, packet->frame.subframe2) )
|
|
expert_add_info(pinfo, opensafety_item, &ei_crc_frame_1_valid_frame2_invalid );
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
opensafety_package_dissector(const gchar *protocolName, const gchar *sub_diss_handle,
|
|
gboolean b_frame2First, gboolean do_byte_swap, guint8 force_nr_in_package,
|
|
tvbuff_t *given_tvb, packet_info *pinfo, proto_tree *tree, guint8 transporttype )
|
|
{
|
|
tvbuff_t *next_tvb = NULL, *gap_tvb = NULL, *message_tvb = NULL;
|
|
guint length, len, frameOffset, frameLength, nodeAddress, gapStart;
|
|
guint8 *swbytes;
|
|
gboolean handled, dissectorCalled, call_sub_dissector, markAsMalformed;
|
|
guint8 type, found, i, tempByte;
|
|
guint16 frameStart1, frameStart2, byte_offset;
|
|
gint reported_len;
|
|
dissector_handle_t protocol_dissector = NULL;
|
|
proto_item *opensafety_item;
|
|
proto_tree *opensafety_tree;
|
|
|
|
opensafety_packet_info *packet = NULL;
|
|
|
|
handled = FALSE;
|
|
dissectorCalled = FALSE;
|
|
call_sub_dissector = FALSE;
|
|
markAsMalformed = FALSE;
|
|
|
|
/* registering frame end routine, to prevent a malformed dissection preventing
|
|
* further dissector calls (see bug #6950) */
|
|
register_frame_end_routine(pinfo, reset_dissector);
|
|
|
|
length = tvb_reported_length(given_tvb);
|
|
/* Minimum package length is 11 */
|
|
if ( length < OSS_MINIMUM_LENGTH )
|
|
return FALSE;
|
|
|
|
/* Determine dissector handle for sub-dissection */
|
|
if ( strlen( sub_diss_handle ) > 0 )
|
|
{
|
|
call_sub_dissector = TRUE;
|
|
protocol_dissector = find_dissector ( sub_diss_handle );
|
|
if ( protocol_dissector == NULL )
|
|
protocol_dissector = data_dissector;
|
|
}
|
|
|
|
reported_len = tvb_reported_length_remaining(given_tvb, 0);
|
|
|
|
/* This will swap the bytes according to MBTCP encoding */
|
|
if ( do_byte_swap == TRUE && global_mbtcp_big_endian == TRUE )
|
|
{
|
|
/* Because of padding bytes at the end of the frame, tvb_memdup could lead
|
|
* to a "openSAFETY truncated" message. By ensuring, that we have enough
|
|
* bytes to copy, this will be prevented. */
|
|
if ( ! tvb_bytes_exist ( given_tvb, 0, length ) )
|
|
return FALSE;
|
|
|
|
swbytes = (guint8 *) tvb_memdup( pinfo->pool, given_tvb, 0, length);
|
|
|
|
/* Wordswapping for modbus detection */
|
|
/* Only a even number of bytes can be swapped */
|
|
len = (length / 2);
|
|
for ( i = 0; i < len; i++ )
|
|
{
|
|
tempByte = swbytes [ 2 * i ]; swbytes [ 2 * i ] = swbytes [ 2 * i + 1 ]; swbytes [ 2 * i + 1 ] = tempByte;
|
|
}
|
|
|
|
message_tvb = tvb_new_real_data(swbytes, length, reported_len);
|
|
} else {
|
|
message_tvb = given_tvb;
|
|
}
|
|
|
|
frameOffset = 0;
|
|
frameLength = 0;
|
|
found = 0;
|
|
|
|
/* Counter to determine gaps between openSAFETY packages */
|
|
gapStart = 0;
|
|
|
|
while ( frameOffset < length )
|
|
{
|
|
/* Reset the next_tvb buffer */
|
|
next_tvb = NULL;
|
|
|
|
/* Smallest possible frame size is 11, but this check must ensure, that even the last frame
|
|
* will get considered, which leads us with 10, as the first byte checked is the second one */
|
|
if ( tvb_captured_length_remaining(message_tvb, frameOffset ) < ( OSS_MINIMUM_LENGTH - 1 ) )
|
|
break;
|
|
|
|
/* Resetting packet, to ensure, that findSafetyFrame starts with a fresh frame.
|
|
* As only packet_scope is used, this will not polute memory too much and get's
|
|
* cleared with the next packet anyway */
|
|
packet = wmem_new0(wmem_packet_scope(), opensafety_packet_info);
|
|
|
|
/* Finding the start of the first possible safety frame */
|
|
if ( findSafetyFrame(message_tvb, frameOffset, b_frame2First, &frameOffset, &frameLength, packet) )
|
|
{
|
|
/* if packet msg_id is not null, it still might be an incorrect frame, as there is no validity
|
|
* check in findSafetyFrame for the msg id (this happens later in this routine)
|
|
* frameLength is calculated/read directly from the dissected data. If frameLength and frameOffset together
|
|
* are bigger than the reported length, the package is not really an openSAFETY package */
|
|
if ( packet->msg_id == 0 || ( frameOffset + frameLength ) > (guint)reported_len )
|
|
break;
|
|
|
|
found++;
|
|
|
|
byte_offset = ( b_frame2First ? 0 : frameOffset );
|
|
/* We determine a possible position for frame 1 and frame 2 */
|
|
if ( b_frame2First )
|
|
{
|
|
frameStart1 = findFrame1Position (message_tvb, byte_offset, frameLength, FALSE );
|
|
frameStart2 = 0;
|
|
}
|
|
else
|
|
{
|
|
frameStart1 = 0;
|
|
frameStart2 = ((OSS_FRAME_LENGTH_T(message_tvb, byte_offset + frameStart1) - 1) +
|
|
(OSS_FRAME_LENGTH_T(message_tvb, byte_offset + frameStart1) > OSS_PAYLOAD_MAXSIZE_FOR_CRC8 ? OSS_SLIM_FRAME2_WITH_CRC16 : OSS_SLIM_FRAME2_WITH_CRC8));
|
|
}
|
|
|
|
/* If both frame starts are equal, something went wrong. In which case, we retract the found entry, and
|
|
* also increase the search offset, just doing a continue will result in an infinite loop. */
|
|
if (frameStart1 == frameStart2)
|
|
{
|
|
found--;
|
|
frameOffset += frameLength;
|
|
continue;
|
|
}
|
|
|
|
/* We determine the possible type, and return false, if there could not be one */
|
|
packet->msg_id = OSS_FRAME_ID_T(message_tvb, byte_offset + frameStart1);
|
|
if ( ( packet->msg_id & OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE ) == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE;
|
|
else if ( ( packet->msg_id & OPENSAFETY_SSDO_MESSAGE_TYPE ) == OPENSAFETY_SSDO_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SSDO_MESSAGE_TYPE;
|
|
else if ( ( packet->msg_id & OPENSAFETY_SPDO_MESSAGE_TYPE ) == OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SPDO_MESSAGE_TYPE;
|
|
else if ( ( packet->msg_id & OPENSAFETY_SNMT_MESSAGE_TYPE ) == OPENSAFETY_SNMT_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SNMT_MESSAGE_TYPE;
|
|
else
|
|
{
|
|
/* This is an invalid openSAFETY package, but it could be an undetected slim ssdo message. This specific error
|
|
* will only occur, if findFrame1Position is in play. So we search once more, but this time calculating the CRC.
|
|
* The reason for the second run is, that calculating the CRC is time consuming. */
|
|
if ( b_frame2First )
|
|
{
|
|
/* Now let's check again, but this time calculate the CRC */
|
|
frameStart1 = findFrame1Position(message_tvb, ( b_frame2First ? 0 : frameOffset ), frameLength, TRUE );
|
|
frameStart2 = 0;
|
|
|
|
packet->msg_id = OSS_FRAME_ID_T(message_tvb, byte_offset + frameStart1);
|
|
if ( ( packet->msg_id & OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE ) == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE;
|
|
else if ( ( packet->msg_id & OPENSAFETY_SSDO_MESSAGE_TYPE ) == OPENSAFETY_SSDO_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SSDO_MESSAGE_TYPE;
|
|
else if ( ( packet->msg_id & OPENSAFETY_SPDO_MESSAGE_TYPE ) == OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SPDO_MESSAGE_TYPE;
|
|
else if ( ( packet->msg_id & OPENSAFETY_SNMT_MESSAGE_TYPE ) == OPENSAFETY_SNMT_MESSAGE_TYPE )
|
|
type = OPENSAFETY_SNMT_MESSAGE_TYPE;
|
|
else {
|
|
/* Skip this frame. We cannot continue without
|
|
advancing frameOffset - just doing a continue
|
|
will result in an infinite loop. Advancing with 1 will
|
|
lead to infinite loop, advancing with frameLength might miss
|
|
some packages*/
|
|
frameOffset += 2;
|
|
found--;
|
|
continue;
|
|
}
|
|
} else {
|
|
/* As stated above, you cannot just continue
|
|
without advancing frameOffset. Advancing with 1 will
|
|
lead to infinite loop, advancing with frameLength might miss
|
|
some packages*/
|
|
frameOffset += 2;
|
|
found--;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Sorting messages for transporttype */
|
|
if ( global_classify_transport && transporttype != 0 )
|
|
{
|
|
/* Cyclic data is transported via SPDOs and acyclic is transported via SNMT, SSDO. Everything
|
|
* else is misclassification */
|
|
if ( ( transporttype == OPENSAFETY_ACYCLIC_DATA && type == OPENSAFETY_SPDO_MESSAGE_TYPE ) ||
|
|
( transporttype == OPENSAFETY_CYCLIC_DATA && type != OPENSAFETY_SPDO_MESSAGE_TYPE ) )
|
|
{
|
|
frameOffset += 2;
|
|
found--;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Some faulty packages do indeed have a valid first frame, but the second is
|
|
* invalid. These checks should prevent most faulty detections */
|
|
if ( type != OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
{
|
|
/* Is the given type at least known? */
|
|
gint idx = -1;
|
|
try_val_to_str_idx(OSS_FRAME_ID_T(message_tvb, byte_offset + frameStart1), opensafety_message_type_values, &idx );
|
|
/* Unknown Frame Type */
|
|
if ( idx < 0 )
|
|
{
|
|
frameOffset += 2;
|
|
found--;
|
|
continue;
|
|
}
|
|
/* Frame IDs do not match */
|
|
else if ( type == OPENSAFETY_SNMT_MESSAGE_TYPE &&
|
|
(OSS_FRAME_ID_T(message_tvb, byte_offset + frameStart1) != OSS_FRAME_ID_T(message_tvb, byte_offset + frameStart2)) )
|
|
{
|
|
frameOffset += 2;
|
|
found--;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* If this package is not valid, the next step, which normally occurs in unxorFrame will lead to a
|
|
* frameLength bigger than the maximum data size. This is an indicator, that the package in general
|
|
* is fault, and therefore we return false. Increasing the frameOffset will lead to out-of-bounds
|
|
* for tvb_* functions. And frameLength errors are misidentified packages most of the times anyway */
|
|
if ( ( (gint)frameLength - (gint)( frameStart2 > frameStart1 ? frameStart2 : frameLength - frameStart1 ) ) < 0 )
|
|
return FALSE;
|
|
|
|
/* Some SPDO based sanity checks, still a lot of faulty SPDOs remain, because they
|
|
* cannot be filtered, without throwing out too many positives. */
|
|
if ( type == OPENSAFETY_SPDO_MESSAGE_TYPE )
|
|
{
|
|
/* Checking if there is a node address set, or the package is invalid. Some PRes
|
|
* messages in EPL may double as valid subframes 1. If the nodeAddress is out of
|
|
* range, the package is marked as malformed */
|
|
nodeAddress = OSS_FRAME_ADDR_T(message_tvb, byte_offset + frameStart1);
|
|
if ( nodeAddress == 0 || nodeAddress > 1024 ) {
|
|
markAsMalformed = TRUE;
|
|
}
|
|
}
|
|
|
|
/* From here on, the package should be correct. Even if it is not correct, it will be dissected
|
|
* anyway and marked as malformed. Therefore it can be assumed, that a gap will end here.
|
|
*/
|
|
if ( global_display_intergap_data == TRUE && gapStart != frameOffset )
|
|
{
|
|
/* Storing the gap data in subset, and calling the data dissector to display it */
|
|
gap_tvb = tvb_new_subset(message_tvb, gapStart, (frameOffset - gapStart), reported_len);
|
|
call_dissector(data_dissector, gap_tvb, pinfo, tree);
|
|
}
|
|
/* Setting the gap to the next offset */
|
|
gapStart = frameOffset + frameLength;
|
|
|
|
/* Adding second data source */
|
|
next_tvb = tvb_new_subset ( message_tvb, frameOffset, frameLength, reported_len );
|
|
/* Adding a visual aid to the dissector tree */
|
|
add_new_data_source(pinfo, next_tvb, "openSAFETY Frame");
|
|
|
|
/* A new subtype for package dissection will need to set the actual nr. for the whole dissected package */
|
|
if ( force_nr_in_package > 0 )
|
|
{
|
|
found = force_nr_in_package + 1;
|
|
dissectorCalled = TRUE;
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, protocolName);
|
|
}
|
|
|
|
if ( ! dissectorCalled )
|
|
{
|
|
if ( call_sub_dissector )
|
|
call_dissector(protocol_dissector, message_tvb, pinfo, tree);
|
|
dissectorCalled = TRUE;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, protocolName);
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
}
|
|
|
|
/* if the tree is NULL, we are called for the overview, otherwise for the
|
|
more detailed view of the package */
|
|
if ( tree )
|
|
{
|
|
/* create the opensafety protocol tree */
|
|
opensafety_item = proto_tree_add_item(tree, proto_opensafety, message_tvb, frameOffset, frameLength, ENC_NA);
|
|
opensafety_tree = proto_item_add_subtree(opensafety_item, ett_opensafety);
|
|
} else {
|
|
opensafety_item = NULL;
|
|
opensafety_tree = NULL;
|
|
}
|
|
|
|
/* Setting type to packet_info */
|
|
packet->msg_type = type;
|
|
|
|
packet->frame.frame_tvb = next_tvb;
|
|
packet->frame.subframe1 = frameStart1;
|
|
packet->frame.subframe2 = frameStart2;
|
|
packet->frame.length = frameLength;
|
|
packet->frame.malformed = FALSE;
|
|
|
|
if ( dissect_opensafety_message(packet, next_tvb, pinfo, opensafety_item, opensafety_tree, found) != TRUE )
|
|
markAsMalformed = TRUE;
|
|
|
|
if ( markAsMalformed )
|
|
{
|
|
packet->frame.malformed = TRUE;
|
|
if ( OSS_FRAME_ADDR_T(message_tvb, byte_offset + frameStart1) > 1024 )
|
|
expert_add_info(pinfo, opensafety_item, &ei_message_spdo_address_invalid );
|
|
}
|
|
|
|
tap_queue_packet(opensafety_tap, pinfo, packet);
|
|
|
|
/* Something is being displayed, therefore this dissector returns true */
|
|
handled = TRUE;
|
|
}
|
|
else
|
|
break;
|
|
|
|
/* findSafetyFrame starts at frameOffset with the search for the next position. But the
|
|
* offset is assumed to be the ID, which can lead to scenarios, where the CRC of a previous
|
|
* detected frame is assumed to be the addr of the next one. +1 prevents such a scenario.
|
|
* It must be checked, if the resulting frameOffset does not scratch the max length. It
|
|
* cannot exceed by adding just frameLength, as this value is a result of the heuristic, and
|
|
* therefore must be within the correct length, but it can exceed if +1 is added unchecked. */
|
|
frameOffset += frameLength;
|
|
if ( tvb_captured_length_remaining(message_tvb, frameOffset) > 0 )
|
|
frameOffset += 1;
|
|
}
|
|
|
|
if ( handled == TRUE )
|
|
{
|
|
/* There might be some undissected data at the end of the frame (e.g. SercosIII) */
|
|
if ( frameOffset < length && global_display_intergap_data == TRUE && gapStart != frameOffset )
|
|
{
|
|
/* Storing the gap data in subset, and calling the data dissector to display it */
|
|
gap_tvb = tvb_new_subset(message_tvb, gapStart, (length - gapStart), reported_len);
|
|
call_dissector(data_dissector, gap_tvb, pinfo, tree);
|
|
}
|
|
}
|
|
|
|
return ( handled ? TRUE : FALSE );
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_epl(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data )
|
|
{
|
|
gboolean result = FALSE;
|
|
proto_tree *epl_tree = NULL;
|
|
guint8 epl_msgtype = 0;
|
|
|
|
if ( ! global_enable_plk )
|
|
return result;
|
|
|
|
/* We will call the epl dissector by using call_dissector(). The epl dissector will then call
|
|
* the heuristic openSAFETY dissector again. By setting this information, we prevent a dissector
|
|
* loop */
|
|
if ( bDissector_Called_Once_Before == FALSE )
|
|
{
|
|
bDissector_Called_Once_Before = TRUE;
|
|
|
|
/* Set the tree up, until it is par with the top-level */
|
|
epl_tree = tree;
|
|
while ( epl_tree != NULL && epl_tree->parent != NULL )
|
|
epl_tree = epl_tree->parent;
|
|
|
|
/* Ordering message type to traffic types */
|
|
if ( *((guint8*)data) == 0x03 || *((guint8*)data) == 0x04 )
|
|
epl_msgtype = OPENSAFETY_CYCLIC_DATA;
|
|
else
|
|
epl_msgtype = OPENSAFETY_ACYCLIC_DATA;
|
|
|
|
/* We check if we have a asynchronous message, or a synchronoues message. In case of
|
|
* asynchronous messages, SPDO packages are not valid. */
|
|
|
|
result = opensafety_package_dissector("openSAFETY/Powerlink", "",
|
|
FALSE, FALSE, 0, message_tvb, pinfo, epl_tree, epl_msgtype );
|
|
|
|
bDissector_Called_Once_Before = FALSE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_siii_udp(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_ )
|
|
{
|
|
if ( ! global_enable_siii )
|
|
return FALSE;
|
|
|
|
return opensafety_package_dissector("openSAFETY/SercosIII UDP", "", FALSE, FALSE, 0,
|
|
message_tvb, pinfo, tree, OPENSAFETY_ACYCLIC_DATA );
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_siii(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_ )
|
|
{
|
|
gboolean result = FALSE;
|
|
guint8 firstByte;
|
|
|
|
if ( ! global_enable_siii )
|
|
return result;
|
|
|
|
/* We can assume to have a SercosIII package, as the SercosIII dissector won't detect
|
|
* SercosIII-UDP packages, this is most likely SercosIII-over-ethernet */
|
|
|
|
/* We will call the SercosIII dissector by using call_dissector(). The SercosIII dissector will
|
|
* then call the heuristic openSAFETY dissector again. By setting this information, we prevent
|
|
* a dissector loop. */
|
|
if ( bDissector_Called_Once_Before == FALSE )
|
|
{
|
|
bDissector_Called_Once_Before = TRUE;
|
|
/* No frames can be sent in AT messages, therefore those get filtered right away */
|
|
firstByte = ( tvb_get_guint8(message_tvb, 0) << 1 );
|
|
if ( ( firstByte & 0x40 ) == 0x40 )
|
|
{
|
|
result = opensafety_package_dissector("openSAFETY/SercosIII", "sercosiii",
|
|
FALSE, FALSE, 0, message_tvb, pinfo, tree, OPENSAFETY_CYCLIC_DATA );
|
|
}
|
|
bDissector_Called_Once_Before = FALSE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_pn_io(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_ )
|
|
{
|
|
gboolean result = FALSE;
|
|
|
|
if ( ! global_enable_pnio )
|
|
return result;
|
|
|
|
/* We will call the pn_io dissector by using call_dissector(). The epl dissector will then call
|
|
* the heuristic openSAFETY dissector again. By setting this information, we prevent a dissector
|
|
* loop */
|
|
if ( bDissector_Called_Once_Before == FALSE )
|
|
{
|
|
bDissector_Called_Once_Before = TRUE;
|
|
result = opensafety_package_dissector("openSAFETY/Profinet IO", "pn_io",
|
|
FALSE, FALSE, 0, message_tvb, pinfo, tree, 0);
|
|
bDissector_Called_Once_Before = FALSE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_mbtcp(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_ )
|
|
{
|
|
if ( ! global_enable_mbtcp )
|
|
return FALSE;
|
|
|
|
/* When Modbus/TCP gets dissected, openSAFETY would be sorted as a child protocol. Although,
|
|
* this behaviour is technically correct, it differs from other implemented IEM protocol handlers.
|
|
* Therefore, the openSAFETY frame gets put one up, if the parent is not NULL */
|
|
return opensafety_package_dissector("openSAFETY/Modbus TCP", "", FALSE, TRUE, 0,
|
|
message_tvb, pinfo, ( ((tree != NULL) && (tree->parent != NULL)) ? tree->parent : tree ), 0);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_opensafety_udpdata(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_ )
|
|
{
|
|
gboolean result = FALSE;
|
|
static guint32 frameNum = 0;
|
|
static guint32 frameIdx = 0;
|
|
|
|
if ( ! global_enable_udp )
|
|
return result;
|
|
|
|
/* An openSAFETY frame has at least OSS_MINIMUM_LENGTH bytes */
|
|
if ( tvb_captured_length ( message_tvb ) < OSS_MINIMUM_LENGTH )
|
|
return result;
|
|
|
|
/* More than one openSAFETY package could be transported in the same frame,
|
|
* in such a case, we need to establish the number of packages inside the frame */
|
|
if ( pinfo->fd->num != frameNum )
|
|
{
|
|
frameIdx = 0;
|
|
frameNum = pinfo->fd->num;
|
|
}
|
|
|
|
result = opensafety_package_dissector((pinfo->destport == OPENSAFETY_UDP_PORT_SIII ? "openSAFETY/SercosIII" : "openSAFETY/UDP" ),
|
|
"", pinfo->destport == OPENSAFETY_UDP_PORT_SIII ? global_siii_udp_frame2_first : global_udp_frame2_first,
|
|
FALSE, frameIdx, message_tvb, pinfo, tree,
|
|
pinfo->destport == OPENSAFETY_UDP_PORT_SIII ? OPENSAFETY_ACYCLIC_DATA : 0 );
|
|
|
|
if ( result )
|
|
frameIdx++;
|
|
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
apply_prefs ( void )
|
|
{
|
|
static dissector_handle_t opensafety_udpdata_handle;
|
|
static dissector_handle_t opensafety_sii_handle;
|
|
static guint opensafety_udp_port_number;
|
|
static guint opensafety_udp_siii_port_number;
|
|
static gboolean opensafety_init = FALSE;
|
|
|
|
/* It only should delete dissectors, if run for any time except the first */
|
|
if ( !opensafety_init )
|
|
{
|
|
opensafety_udpdata_handle = find_dissector("opensafety_udpdata");
|
|
opensafety_sii_handle = find_dissector("opensafety_siii");
|
|
opensafety_init = TRUE;
|
|
}
|
|
else
|
|
{
|
|
/* Delete dissectors in preparation of a changed config setting */
|
|
dissector_delete_uint ("udp.port", opensafety_udp_port_number, opensafety_udpdata_handle);
|
|
dissector_delete_uint ("udp.port", opensafety_udp_siii_port_number, opensafety_sii_handle);
|
|
}
|
|
|
|
|
|
/* Storing the port numbers locally, to being able to delete the old associations */
|
|
opensafety_udp_port_number = global_network_udp_port;
|
|
opensafety_udp_siii_port_number = global_network_udp_port_sercosiii;
|
|
|
|
/* Default UDP only based dissector */
|
|
dissector_add_uint("udp.port", opensafety_udp_port_number, find_dissector("opensafety_udpdata"));
|
|
|
|
/* Sercos III dissector does not handle UDP transport, has to be handled
|
|
* separately, everything else should be caught by the heuristic dissector
|
|
*/
|
|
dissector_add_uint("udp.port", opensafety_udp_siii_port_number, find_dissector("opensafety_siii_udp"));
|
|
|
|
}
|
|
|
|
void
|
|
proto_register_opensafety(void)
|
|
{
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
{ &hf_oss_scm_udid,
|
|
{ "SCM UDID Configured", "opensafety.scm_udid",
|
|
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_scm_udid_auto,
|
|
{ "SCM UDID Auto Detect", "opensafety.scm_udid.auto",
|
|
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_scm_udid_valid,
|
|
{ "SCM UDID Valid", "opensafety.scm_udid.valid",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
|
|
{ &hf_oss_msg,
|
|
{ "Message", "opensafety.msg.id",
|
|
FT_UINT8, BASE_HEX, VALS(opensafety_message_type_values), 0x0, NULL, HFILL } },
|
|
{ &hf_oss_msg_category,
|
|
{ "Type", "opensafety.msg.type",
|
|
FT_UINT8, BASE_HEX, VALS(opensafety_msg_id_values), 0xE0, NULL, HFILL } },
|
|
{ &hf_oss_msg_direction,
|
|
{ "Direction", "opensafety.msg.direction",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_message_direction), 0x04, NULL, HFILL } },
|
|
{ &hf_oss_msg_node,
|
|
{ "Safety Node", "opensafety.msg.node",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_msg_network,
|
|
{ "Safety Domain", "opensafety.msg.network",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_msg_sender,
|
|
{ "SN send from", "opensafety.msg.sender",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_msg_receiver,
|
|
{ "SN send to", "opensafety.msg.receiver",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_length,
|
|
{ "Length", "opensafety.length",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_crc,
|
|
{ "CRC", "opensafety.crc.data",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
|
|
{ &hf_oss_crc_valid,
|
|
{ "Is Valid", "opensafety.crc.valid",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_crc_type,
|
|
{ "CRC Type", "opensafety.crc.type",
|
|
FT_UINT8, BASE_DEC, VALS(opensafety_frame_crc_type), 0x0, NULL, HFILL } },
|
|
{ &hf_oss_crc2_valid,
|
|
{ "Is Valid", "opensafety.crc2.valid",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
|
|
/* SNMT Specific fields */
|
|
{ &hf_oss_snmt_slave,
|
|
{ "SNMT Slave", "opensafety.snmt.slave",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_master,
|
|
{ "SNMT Master", "opensafety.snmt.master",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_scm,
|
|
{ "SCM", "opensafety.snmt.scm",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_tool,
|
|
{ "Tool ID", "opensafety.snmt.tool_id",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_udid,
|
|
{ "UDID for SN", "opensafety.snmt.udid",
|
|
FT_ETHER, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_service_id,
|
|
{ "Extended Service ID", "opensafety.snmt.service_id",
|
|
FT_UINT8, BASE_HEX, VALS(opensafety_message_service_type), 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_error_group,
|
|
{ "Error Group", "opensafety.snmt.error_group",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_error_code,
|
|
{ "Error Code", "opensafety.snmt.error_code",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_param_type,
|
|
{ "Parameter Request Type", "opensafety.snmt.parameter_type",
|
|
FT_BOOLEAN, BASE_NONE, TFS(&opensafety_addparam_request), 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_ext_addsaddr,
|
|
{ "Additional SADDR", "opensafety.snmt.additional.saddr",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_ext_addtxspdo,
|
|
{ "Additional TxSPDO", "opensafety.snmt.additional.txspdo",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_snmt_ext_initct,
|
|
{ "Initial CT", "opensafety.snmt.initct",
|
|
FT_UINT40, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
|
|
/* SSDO Specific fields */
|
|
{ &hf_oss_ssdo_server,
|
|
{ "SSDO Server", "opensafety.ssdo.master",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_client,
|
|
{ "SSDO Client", "opensafety.ssdo.client",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sano,
|
|
{ "SOD Access Request Number", "opensafety.ssdo.sano",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sacmd,
|
|
{ "SOD Access Command", "opensafety.ssdo.sacmd",
|
|
FT_UINT8, BASE_HEX, VALS(opensafety_ssdo_sacmd_values), 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sod_index,
|
|
{ "SOD Index", "opensafety.ssdo.sodentry.index",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sod_subindex,
|
|
{ "SOD Sub Index", "opensafety.ssdo.sodentry.subindex",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_payload,
|
|
{ "SOD Payload", "opensafety.ssdo.payload",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_payload_size,
|
|
{ "SOD Payload Size", "opensafety.ssdo.payloadsize",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sodentry_size,
|
|
{ "SOD Entry Size", "opensafety.ssdo.sodentry.size",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sodentry_data,
|
|
{ "SOD Data", "opensafety.ssdo.sodentry.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_sod_par_timestamp,
|
|
{ "Parameter Timestamp", "opensafety.sod.parameter.timestamp",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_sod_par_checksum,
|
|
{ "Parameter Checksum", "opensafety.sod.parameter.checksum",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
|
|
{ &hf_oss_ssdo_sodmapping,
|
|
{ "Mapping entry", "opensafety.sod.mapping",
|
|
FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sodmapping_bits,
|
|
{ "Mapping size", "opensafety.sod.mapping.bits",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
|
|
{ &hf_oss_ssdo_extpar_parset,
|
|
{ "Additional Parameter Set", "opensafety.ssdo.extpar.setnr",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_extpar_version,
|
|
{ "Parameter Set Version", "opensafety.ssdo.extpar.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_extpar_saddr,
|
|
{ "Parameter Set for SADDR", "opensafety.ssdo.extpar.saddr",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_extpar_length,
|
|
{ "Parameter Set Length", "opensafety.ssdo.extpar.length",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_extpar_crc,
|
|
{ "Parameter Set CRC", "opensafety.ssdo.extpar.crc",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_extpar_tstamp,
|
|
{ "Timestamp", "opensafety.ssdo.extpar.timestamp",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_extpar_data,
|
|
{ "Ext. Parameter Data", "opensafety.ssdo.extpar.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_extpar,
|
|
{ "Ext. Parameter", "opensafety.ssdo.extpar",
|
|
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
|
|
{&hf_oss_fragments,
|
|
{"Message fragments", "opensafety.ssdo.fragments",
|
|
FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_fragment,
|
|
{"Message fragment", "opensafety.ssdo.fragment",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_fragment_overlap,
|
|
{"Message fragment overlap", "opensafety.ssdo.fragment.overlap",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_fragment_overlap_conflicts,
|
|
{"Message fragment overlapping with conflicting data",
|
|
"opensafety.ssdo.fragment.overlap.conflicts",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_fragment_multiple_tails,
|
|
{"Message has multiple tail fragments", "opensafety.ssdo.fragment.multiple_tails",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_fragment_too_long_fragment,
|
|
{"Message fragment too long", "opensafety.ssdo.fragment.too_long_fragment",
|
|
FT_BOOLEAN, 0, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_fragment_error,
|
|
{"Message defragmentation error", "opensafety.ssdo.fragment.error",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_fragment_count,
|
|
{"Message fragment count", "opensafety.ssdo.fragment.count",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_reassembled_in,
|
|
{"Reassembled in", "opensafety.ssdo.reassembled.in",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_reassembled_length,
|
|
{"Reassembled length", "opensafety.ssdo.reassembled.length",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } },
|
|
{&hf_oss_reassembled_data,
|
|
{"Reassembled Data", "opensafety.ssdo.reassembled.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL } },
|
|
|
|
{ &hf_oss_ssdo_abort_code,
|
|
{ "Abort Code", "opensafety.ssdo.abortcode",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
|
|
{ &hf_oss_ssdo_preload_error,
|
|
{ "Wrong/missing segment", "opensafety.ssdo.preload.error",
|
|
FT_BOOLEAN, 8, NULL, 0x30, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_preload_queue,
|
|
{ "Preload Queue Size", "opensafety.ssdo.preload.queuesize",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
|
|
|
|
/* SSDO SACmd specific fields */
|
|
{ &hf_oss_ssdo_sacmd_access_type,
|
|
{ "Access Direction", "opensafety.ssdo.sacmd.access",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_sacmd_acc), OPENSAFETY_SSDO_SACMD_ACC, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sacmd_preload,
|
|
{ "Preload Transfer", "opensafety.ssdo.sacmd.preload",
|
|
FT_BOOLEAN, 8, TFS(&tfs_enabled_disabled), OPENSAFETY_SSDO_SACMD_PRLD, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sacmd_abort_transfer,
|
|
{ "Abort Transfer", "opensafety.ssdo.sacmd.abort_transfer",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_sacmd_abrt), OPENSAFETY_SSDO_SACMD_ABRT, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sacmd_segmentation,
|
|
{ "Segmentation", "opensafety.ssdo.sacmd.segmentation",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_sacmd_seg), OPENSAFETY_SSDO_SACMD_SEG, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sacmd_toggle,
|
|
{ "Toggle Bit", "opensafety.ssdo.sacmd.toggle",
|
|
FT_BOOLEAN, 8, TFS(&tfs_on_off), OPENSAFETY_SSDO_SACMD_TGL, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sacmd_initiate,
|
|
{ "Initiate Transfer", "opensafety.ssdo.sacmd.initiate",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_sacmd_ini), OPENSAFETY_SSDO_SACMD_INI, NULL, HFILL } },
|
|
{ &hf_oss_ssdo_sacmd_end_segment,
|
|
{ "End Segment", "opensafety.ssdo.sacmd.end_segment",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_sacmd_ensg), OPENSAFETY_SSDO_SACMD_ENSG, NULL, HFILL } },
|
|
#if 0
|
|
{ &hf_oss_ssdo_sacmd_reserved,
|
|
{ "Reserved", "opensafety.ssdo.sacmd.reserved",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_sacmd_res), OPENSAFETY_SSDO_SACMD_RES, NULL, HFILL } },
|
|
#endif
|
|
|
|
/* SPDO Specific fields */
|
|
{ &hf_oss_spdo_connection_valid,
|
|
{ "Connection Valid Bit", "opensafety.spdo.connection_valid",
|
|
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x04, NULL, HFILL } },
|
|
{ &hf_oss_spdo_direction,
|
|
{ "Send to", "opensafety.spdo.direction",
|
|
FT_BOOLEAN, 8, TFS(&opensafety_spdo_direction), 0x08, NULL, HFILL } },
|
|
{ &hf_oss_spdo_ct,
|
|
{ "Consecutive Time", "opensafety.spdo.ct",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_spdo_ct_40bit,
|
|
{ "Consecutive Time 40bit", "opensafety.spdo.ct40bit",
|
|
FT_UINT40, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_spdo_time_request,
|
|
{ "Time Request Counter", "opensafety.spdo.time.request_counter",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_spdo_time_request_to,
|
|
{ "Time Request from", "opensafety.spdo.time.request_from",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_spdo_time_request_from,
|
|
{ "Time Request by", "opensafety.spdo.time.request_to",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_spdo_feature_flags,
|
|
{ "SPDO Feature Flags", "opensafety.spdo.featureflags",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_oss_spdo_feature_flag_40bit_available,
|
|
{ "40Bit Request", "opensafety.spdo.features.40bitrequest",
|
|
FT_BOOLEAN, 8, TFS(&tfs_requested_not_requested), (OPENSAFETY_SPDO_FEAT_40BIT_AVAIL << 2), NULL, HFILL } },
|
|
{ &hf_oss_spdo_feature_flag_40bit_used,
|
|
{ "40Bit Counter", "opensafety.spdo.features.40bitactive",
|
|
FT_BOOLEAN, 8, TFS(&tfs_enabled_disabled), (OPENSAFETY_SPDO_FEAT_40BIT_USED << 2), NULL, HFILL } },
|
|
|
|
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_opensafety,
|
|
&ett_opensafety_node,
|
|
&ett_opensafety_checksum,
|
|
&ett_opensafety_snmt,
|
|
&ett_opensafety_ssdo,
|
|
&ett_opensafety_ssdo_sacmd,
|
|
&ett_opensafety_ssdo_fragment,
|
|
&ett_opensafety_ssdo_fragments,
|
|
&ett_opensafety_ssdo_payload,
|
|
&ett_opensafety_ssdo_sodentry,
|
|
&ett_opensafety_sod_mapping,
|
|
&ett_opensafety_ssdo_extpar,
|
|
&ett_opensafety_spdo,
|
|
&ett_opensafety_spdo_flags,
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_crc_frame_1_invalid,
|
|
{ "opensafety.crc.error.frame1_invalid", PI_PROTOCOL, PI_ERROR,
|
|
"Frame 1 CRC invalid, Possible error in package", EXPFILL } },
|
|
{ &ei_crc_frame_1_valid_frame2_invalid,
|
|
{ "opensafety.crc.error.frame1_valid_frame2_invalid", PI_PROTOCOL, PI_ERROR,
|
|
"Frame 1 is valid, frame 2 id is invalid", EXPFILL } },
|
|
{ &ei_crc_slimssdo_instead_of_spdo,
|
|
{ "opensafety.crc.warning.wrong_crc_for_spdo", PI_PROTOCOL, PI_WARN,
|
|
"Frame 1 SPDO CRC is Slim SSDO CRC16 0x5935", EXPFILL } },
|
|
{ &ei_crc_frame_2_invalid,
|
|
{ "opensafety.crc.error.frame2_invalid", PI_PROTOCOL, PI_ERROR,
|
|
"Frame 2 CRC invalid, Possible error in package or crc calculation", EXPFILL } },
|
|
{ &ei_crc_frame_2_unknown_scm_udid,
|
|
{ "opensafety.crc.error.frame2_unknown_scmudid", PI_PROTOCOL, PI_WARN,
|
|
"Frame 2 CRC invalid, SCM UDID was not auto-detected", EXPFILL } },
|
|
{ &ei_crc_frame_2_scm_udid_encoded,
|
|
{ "opensafety.crc.error.crc2_scm_udid_encoded", PI_PROTOCOL, PI_NOTE,
|
|
"Frame 2 CRC is encoded with byte 6 of SCM UDID due to payload length of 0 in frame 2 or SLIM SSDO", EXPFILL } },
|
|
|
|
{ &ei_message_reassembly_size_differs_from_header,
|
|
{ "opensafety.msg.warning.reassembly_size_fail", PI_PROTOCOL, PI_WARN,
|
|
"Reassembled message size differs from size in header", EXPFILL } },
|
|
{ &ei_message_unknown_type,
|
|
{ "opensafety.msg.error.unknown_type", PI_MALFORMED, PI_ERROR,
|
|
"Unknown openSAFETY message type", EXPFILL } },
|
|
{ &ei_message_spdo_address_invalid,
|
|
{ "opensafety.msg.error.spdo_address_invalid", PI_MALFORMED, PI_ERROR,
|
|
"SPDO address is invalid", EXPFILL } },
|
|
{ &ei_message_id_field_mismatch,
|
|
{ "opensafety.msg.error.id.mismatch", PI_PROTOCOL, PI_ERROR,
|
|
"ID for frame 2 is not the same as for frame 1", EXPFILL } },
|
|
|
|
{ &ei_scmudid_autodetected,
|
|
{ "opensafety.scm_udid.note.autodetected", PI_PROTOCOL, PI_NOTE,
|
|
"Auto detected payload as SCM UDID", EXPFILL } },
|
|
{ &ei_scmudid_invalid_preference,
|
|
{ "opensafety.scm_udid.note.invalid_preference", PI_PROTOCOL, PI_WARN,
|
|
"openSAFETY protocol settings are invalid! SCM UDID first octet will be assumed to be 00", EXPFILL } },
|
|
{ &ei_scmudid_unknown,
|
|
{ "opensafety.scm_udid.warning.assuming_first_octet", PI_PROTOCOL, PI_WARN,
|
|
"SCM UDID unknown, assuming 00 as first UDID octet", EXPFILL } },
|
|
|
|
{ &ei_payload_unknown_format,
|
|
{ "opensafety.msg.warning.unknown_format", PI_PROTOCOL, PI_WARN,
|
|
"Unknown payload format detected", EXPFILL } },
|
|
{ &ei_payload_length_not_positive,
|
|
{ "opensafety.msg.warning.reassembly_length_not_positive", PI_PROTOCOL, PI_NOTE,
|
|
"Calculation for payload length yielded non-positive result", EXPFILL } },
|
|
|
|
{ &ei_40bit_default_domain,
|
|
{ "opensafety.msg.warning.default_domain_40bit", PI_PROTOCOL, PI_NOTE,
|
|
"SDN is assumed with 1 to allow 40bit dissection", EXPFILL } },
|
|
|
|
};
|
|
|
|
module_t *opensafety_module;
|
|
expert_module_t *expert_opensafety;
|
|
|
|
/* Register the protocol name and description */
|
|
proto_opensafety = proto_register_protocol("openSAFETY", "openSAFETY", "opensafety");
|
|
opensafety_module = prefs_register_protocol(proto_opensafety, apply_prefs);
|
|
|
|
/* Register data dissector */
|
|
heur_opensafety_spdo_subdissector_list = register_heur_dissector_list("opensafety.spdo");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_opensafety, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Register tap */
|
|
opensafety_tap = register_tap("opensafety");
|
|
|
|
expert_opensafety = expert_register_protocol ( proto_opensafety );
|
|
expert_register_field_array ( expert_opensafety, ei, array_length (ei ) );
|
|
|
|
/* register user preferences */
|
|
prefs_register_string_preference(opensafety_module, "scm_udid",
|
|
"SCM UDID (xx:xx:xx:xx:xx:xx)",
|
|
"To be able to fully dissect SSDO and SPDO packages, a valid UDID for the SCM has to be provided",
|
|
&global_scm_udid);
|
|
prefs_register_bool_preference(opensafety_module, "scm_udid_autoset",
|
|
"Set SCM UDID if detected in stream",
|
|
"Automatically assign a detected SCM UDID (by reading SNMT->SNTM_assign_UDID_SCM) and set it for the file",
|
|
&global_scm_udid_autoset);
|
|
|
|
prefs_register_uint_preference(opensafety_module, "network_udp_port",
|
|
"Port used for Generic UDP",
|
|
"Port used by any UDP demo implementation to transport data", 10,
|
|
&global_network_udp_port);
|
|
prefs_register_uint_preference(opensafety_module, "network_udp_port_sercosiii",
|
|
"Port used for SercosIII/UDP",
|
|
"UDP port used by SercosIII to transport data", 10,
|
|
&global_network_udp_port_sercosiii);
|
|
prefs_register_bool_preference(opensafety_module, "network_udp_frame_first_sercosiii",
|
|
"openSAFETY frame 2 before frame 1 (SercosIII/UDP only)",
|
|
"In an SercosIII/UDP transport stream, openSAFETY frame 2 will be expected before frame 1",
|
|
&global_siii_udp_frame2_first );
|
|
prefs_register_bool_preference(opensafety_module, "network_udp_frame_first",
|
|
"openSAFETY frame 2 before frame 1 (UDP only)",
|
|
"In the transport stream, openSAFETY frame 2 will be expected before frame 1",
|
|
&global_udp_frame2_first );
|
|
prefs_register_bool_preference(opensafety_module, "mbtcp_big_endian",
|
|
"Big Endian Word Coding (Modbus/TCP only)",
|
|
"Modbus/TCP words can be transcoded either big- or little endian. Default will be little endian",
|
|
&global_mbtcp_big_endian);
|
|
|
|
prefs_register_bool_preference(opensafety_module, "enable_plk",
|
|
"Enable heuristic dissection for Ethernet POWERLINK", "Enable heuristic dissection for Ethernet POWERLINK",
|
|
&global_enable_plk);
|
|
prefs_register_bool_preference(opensafety_module, "enable_udp",
|
|
"Enable heuristic dissection for openSAFETY over UDP encoded traffic", "Enable heuristic dissection for openSAFETY over UDP encoded traffic",
|
|
&global_enable_udp);
|
|
prefs_register_bool_preference(opensafety_module, "enable_genudp",
|
|
"Enable heuristic dissection for generic UDP encoded traffic", "Enable heuristic dissection for generic UDP encoded traffic",
|
|
&global_enable_genudp);
|
|
prefs_register_bool_preference(opensafety_module, "enable_siii",
|
|
"Enable heuristic dissection for SercosIII", "Enable heuristic dissection for SercosIII",
|
|
&global_enable_siii);
|
|
prefs_register_bool_preference(opensafety_module, "enable_pnio",
|
|
"Enable heuristic dissection for Profinet IO", "Enable heuristic dissection for Profinet IO",
|
|
&global_enable_pnio);
|
|
prefs_register_bool_preference(opensafety_module, "enable_mbtcp",
|
|
"Enable heuristic dissection for Modbus/TCP", "Enable heuristic dissection for Modbus/TCP",
|
|
&global_enable_mbtcp);
|
|
|
|
prefs_register_bool_preference(opensafety_module, "display_intergap_data",
|
|
"Display the data between openSAFETY packets", "Display the data between openSAFETY packets",
|
|
&global_display_intergap_data);
|
|
prefs_register_bool_preference(opensafety_module, "classify_transport",
|
|
"Dissect packet based on transport method (EPL + SercosIII only)",
|
|
"SPDOs may only be found in cyclic data, SSDOs/SNMTS only in acyclic data",
|
|
&global_classify_transport);
|
|
|
|
/* Registering default and ModBus/TCP dissector */
|
|
new_register_dissector("opensafety_udpdata", dissect_opensafety_udpdata, proto_opensafety );
|
|
new_register_dissector("opensafety_mbtcp", dissect_opensafety_mbtcp, proto_opensafety );
|
|
new_register_dissector("opensafety_siii_udp", dissect_opensafety_siii_udp, proto_opensafety );
|
|
new_register_dissector("opensafety_pnio", dissect_opensafety_pn_io, proto_opensafety);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_opensafety(void)
|
|
{
|
|
/* Storing global data_dissector */
|
|
data_dissector = find_dissector ( "data" );
|
|
|
|
/* EPL & SercosIII dissector registration */
|
|
heur_dissector_add("epl_data", dissect_opensafety_epl, "openSAFETY over EPL", "opensafety_epl_data", proto_opensafety, HEURISTIC_ENABLE);
|
|
heur_dissector_add("sercosiii", dissect_opensafety_siii, "openSAFETY over SercosIII", "opensafety_sercosiii", proto_opensafety, HEURISTIC_ENABLE);
|
|
|
|
/* If an openSAFETY UDP transport filter is present, add to its
|
|
* heuristic filter list. Otherwise ignore the transport */
|
|
if ( find_dissector("opensafety_udp") != NULL )
|
|
heur_dissector_add("opensafety_udp", dissect_opensafety_udpdata, "openSAFETY over UDP", "opensafety_udp", proto_opensafety, HEURISTIC_ENABLE);
|
|
|
|
/* Modbus TCP dissector registration */
|
|
dissector_add_string("modbus.data", "data", find_dissector("opensafety_mbtcp"));
|
|
|
|
/* For Profinet we have to register as a heuristic dissector, as Profinet
|
|
* is implemented as a plugin, and therefore the heuristic dissector is not
|
|
* added by the time this method is being called
|
|
*/
|
|
if ( find_dissector("pn_io") != NULL )
|
|
{
|
|
heur_dissector_add("pn_io", dissect_opensafety_pn_io, "openSAFETY over Profinet", "opensafety_pn_io", proto_opensafety, HEURISTIC_DISABLE);
|
|
}
|
|
else
|
|
{
|
|
/* The native dissector cannot be loaded. so we add our protocol directly to
|
|
* the ethernet subdissector list. No PNIO specific data will be dissected
|
|
* and a warning will be displayed, recognizing the missing dissector plugin.
|
|
*/
|
|
dissector_add_uint("ethertype", ETHERTYPE_PROFINET, find_dissector("opensafety_pnio"));
|
|
}
|
|
|
|
apply_prefs();
|
|
|
|
register_init_routine ( setup_dissector );
|
|
register_cleanup_routine ( cleanup_dissector );
|
|
|
|
/* registering frame end routine, to prevent a malformed dissection preventing
|
|
* further dissector calls (see bug #6950) */
|
|
/* register_frame_end_routine(reset_dissector); */
|
|
}
|
|
|
|
/*
|
|
* 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:
|
|
*/
|