summaryrefslogtreecommitdiffstats
path: root/epan/dissectors/packet-opensafety.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:34:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:34:10 +0000
commite4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch)
tree68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/dissectors/packet-opensafety.c
parentInitial commit. (diff)
downloadwireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz
wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/dissectors/packet-opensafety.c')
-rw-r--r--epan/dissectors/packet-opensafety.c3145
1 files changed, 3145 insertions, 0 deletions
diff --git a/epan/dissectors/packet-opensafety.c b/epan/dissectors/packet-opensafety.c
new file mode 100644
index 00000000..d56d3fda
--- /dev/null
+++ b/epan/dissectors/packet-opensafety.c
@@ -0,0 +1,3145 @@
+/* packet-opensafety.c
+ *
+ * openSAFETY is a machine-safety protocol, encapsulated in modern fieldbus
+ * and industrial ethernet solutions.
+ *
+ * For more information see http://www.open-safety.org
+ *
+ * This dissector currently supports the following transport protocols
+ *
+ * - openSAFETY using POWERLINK
+ * - openSAFETY using SercosIII
+ * - openSAFETY using Generic UDP
+ * - openSAFETY using Modbus/TCP
+ * - openSAFETY using (openSAFETY over UDP) transport
+ * - openSAFETY using ProfiNet IO
+ *
+ * By Roland Knall <roland.knall@br-automation.com>
+ * Copyright 2011-2012 Bernecker + Rainer Industrie-Elektronik Ges.m.b.H.
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/prefs.h>
+#include <epan/etypes.h>
+#include <epan/expert.h>
+#include <epan/reassemble.h>
+#include <epan/strutil.h>
+#include <epan/tap.h>
+#include <epan/conversation_table.h>
+
+#include <wsutil/crc8.h>
+#include <wsutil/crc16.h>
+
+#include "packet-frame.h"
+#include "packet-opensafety.h"
+
+/* General definitions */
+
+/* Used to clasify incoming traffic and presort the heuristic */
+#define OPENSAFETY_ANY_TRANSPORT 0x00
+#define OPENSAFETY_CYCLIC_DATA 0x01
+#define OPENSAFETY_ACYCLIC_DATA 0x02
+
+#ifndef OPENSAFETY_PINFO_CONST_DATA
+#define OPENSAFETY_PINFO_CONST_DATA 0xAABBCCDD
+#endif
+
+#define OPENSAFETY_REQUEST TRUE
+#define OPENSAFETY_RESPONSE FALSE
+
+/* SPDO Feature Flags
+ * Because featureflags are part of the TR field (which is only 6 bit), the field get's shifted */
+#define OPENSAFETY_SPDO_FEAT_40BIT_AVAIL 0x20
+#define OPENSAFETY_SPDO_FEAT_40BIT_USED 0x10
+#define OPENSAFETY_SPDO_FEATURE_FLAGS (OPENSAFETY_SPDO_FEAT_40BIT_USED | OPENSAFETY_SPDO_FEAT_40BIT_AVAIL)
+
+#define OSS_FRAME_POS_ADDR 0
+#define OSS_FRAME_POS_ID 1
+#define OSS_FRAME_POS_LEN 2
+#define OSS_FRAME_POS_CT 3
+#define OSS_FRAME_POS_DATA 4
+
+#define OSS_PAYLOAD_MAXSIZE_FOR_CRC8 0x08
+#define OSS_SLIM_FRAME_WITH_CRC8_MAXSIZE 0x13 /* 19 */
+#define OSS_SLIM_FRAME2_WITH_CRC8 0x06 /* 6 */
+#define OSS_SLIM_FRAME2_WITH_CRC16 0x07 /* 7 */
+#define OSS_MINIMUM_LENGTH 0x0b /* 11 */
+#define OSS_BROADCAST_ADDRESS 0x3ff
+
+#define OPENSAFETY_SPDO_CONNECTION_VALID 0x04
+
+#define OPENSAFETY_SOD_DVI 0x1018
+#define OPENSAFETY_SOD_RXMAP 0x1800
+#define OPENSAFETY_SOD_TXMAP 0xC000
+
+#define OSS_FRAME_ADDR(f, offset) (f[OSS_FRAME_POS_ADDR + offset] + ((guint8)((f[OSS_FRAME_POS_ADDR + offset + 1]) << 6) << 2))
+#define OSS_FRAME_ID(f, offset) (f[OSS_FRAME_POS_ID + offset] & 0xFC )
+#define OSS_FRAME_LENGTH(f, offset) (f[OSS_FRAME_POS_LEN + offset])
+#define OSS_FRAME_FIELD(f, position) (f[position])
+
+#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))
+#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))
+#define OSS_FRAME_ID_T(f, offset) (tvb_get_guint8(f, OSS_FRAME_POS_ID + offset) & 0xFC)
+#define OSS_FRAME_LENGTH_T(f, offset) (tvb_get_guint8(f, OSS_FRAME_POS_LEN + offset))
+
+static int proto_opensafety = -1;
+
+static gint ett_opensafety = -1;
+static gint ett_opensafety_checksum = -1;
+static gint ett_opensafety_snmt = -1;
+static gint ett_opensafety_ssdo = -1;
+static gint ett_opensafety_spdo = -1;
+static gint ett_opensafety_spdo_flags = -1;
+static gint ett_opensafety_ssdo_sacmd = -1;
+static gint ett_opensafety_ssdo_payload = -1;
+static gint ett_opensafety_ssdo_sodentry = -1;
+static gint ett_opensafety_ssdo_extpar = -1;
+static gint ett_opensafety_sod_mapping = -1;
+static gint ett_opensafety_node = -1;
+
+static expert_field ei_payload_length_not_positive = EI_INIT;
+static expert_field ei_payload_unknown_format = EI_INIT;
+static expert_field ei_crc_slimssdo_instead_of_spdo = EI_INIT;
+static expert_field ei_crc_frame_1_invalid = EI_INIT;
+static expert_field ei_crc_frame_1_valid_frame2_invalid = EI_INIT;
+static expert_field ei_crc_frame_2_invalid = EI_INIT;
+static expert_field ei_crc_frame_2_unknown_scm_udid = EI_INIT;
+static expert_field ei_crc_frame_2_scm_udid_encoded = EI_INIT;
+static expert_field ei_message_unknown_type = EI_INIT;
+static expert_field ei_message_reassembly_size_differs_from_header = EI_INIT;
+static expert_field ei_message_spdo_address_invalid = EI_INIT;
+static expert_field ei_message_id_field_mismatch = EI_INIT;
+static expert_field ei_scmudid_autodetected = EI_INIT;
+static expert_field ei_scmudid_invalid_preference = EI_INIT;
+static expert_field ei_scmudid_unknown = EI_INIT;
+static expert_field ei_40bit_default_domain = EI_INIT;
+
+static int hf_oss_msg = -1;
+static int hf_oss_msg_direction = -1;
+static int hf_oss_msg_category = -1;
+static int hf_oss_msg_node = -1;
+static int hf_oss_msg_network = -1;
+static int hf_oss_msg_sender = -1;
+static int hf_oss_msg_receiver = -1;
+static int hf_oss_length= -1;
+static int hf_oss_crc = -1;
+static int hf_oss_byte_offset = -1;
+
+static int hf_oss_crc_valid = -1;
+static int hf_oss_crc2_valid = -1;
+static int hf_oss_crc_type = -1;
+
+static int hf_oss_snmt_slave = -1;
+static int hf_oss_snmt_master = -1;
+static int hf_oss_snmt_udid = -1;
+static int hf_oss_snmt_scm = -1;
+static int hf_oss_snmt_tool = -1;
+static int hf_oss_snmt_service_id = -1;
+static int hf_oss_snmt_error_group = -1;
+static int hf_oss_snmt_error_code = -1;
+static int hf_oss_snmt_param_type = -1;
+static int hf_oss_snmt_ext_addsaddr = -1;
+static int hf_oss_snmt_ext_addtxspdo = -1;
+static int hf_oss_snmt_ext_initct = -1;
+
+static int hf_oss_ssdo_server = -1;
+static int hf_oss_ssdo_client = -1;
+static int hf_oss_ssdo_sano = -1;
+static int hf_oss_ssdo_sacmd = -1;
+static int hf_oss_ssdo_sod_index = -1;
+static int hf_oss_ssdo_sod_subindex = -1;
+static int hf_oss_ssdo_payload = -1;
+static int hf_oss_ssdo_payload_size = -1;
+static int hf_oss_ssdo_sodentry_size = -1;
+static int hf_oss_ssdo_sodentry_data = -1;
+static int hf_oss_ssdo_abort_code = -1;
+static int hf_oss_ssdo_preload_queue = -1;
+static int hf_oss_ssdo_preload_error = -1;
+
+static int hf_oss_sod_par_timestamp = -1;
+static int hf_oss_sod_par_checksum = -1;
+static int hf_oss_ssdo_sodmapping = -1;
+static int hf_oss_ssdo_sodmapping_bits = -1;
+
+static int hf_oss_ssdo_sacmd_access_type = -1;
+static int hf_oss_ssdo_sacmd_preload = -1;
+static int hf_oss_ssdo_sacmd_abort_transfer = -1;
+static int hf_oss_ssdo_sacmd_segmentation = -1;
+static int hf_oss_ssdo_sacmd_toggle = -1;
+static int hf_oss_ssdo_sacmd_initiate = -1;
+static int hf_oss_ssdo_sacmd_end_segment = -1;
+#if 0
+static int hf_oss_ssdo_sacmd_reserved = -1;
+#endif
+
+static int hf_oss_ssdo_extpar_parset = -1;
+static int hf_oss_ssdo_extpar_version = -1;
+static int hf_oss_ssdo_extpar_saddr = -1;
+static int hf_oss_ssdo_extpar_length = -1;
+static int hf_oss_ssdo_extpar_crc = -1;
+static int hf_oss_ssdo_extpar_tstamp = -1;
+static int hf_oss_ssdo_extpar_data = -1;
+static int hf_oss_ssdo_extpar = -1;
+
+static int hf_oss_scm_udid = -1;
+static int hf_oss_scm_udid_auto = -1;
+static int hf_oss_scm_udid_valid = -1;
+
+static int hf_oss_spdo_direction = -1;
+static int hf_oss_spdo_connection_valid = -1;
+static int hf_oss_spdo_ct = -1;
+static int hf_oss_spdo_ct_40bit = -1;
+static int hf_oss_spdo_time_request = -1;
+static int hf_oss_spdo_time_request_to = -1;
+static int hf_oss_spdo_time_request_from = -1;
+static int hf_oss_spdo_feature_flags = -1;
+static int hf_oss_spdo_feature_flag_40bit_available = -1;
+static int hf_oss_spdo_feature_flag_40bit_used = -1;
+
+static int hf_oss_fragments = -1;
+static int hf_oss_fragment = -1;
+static int hf_oss_fragment_overlap = -1;
+static int hf_oss_fragment_overlap_conflicts = -1;
+static int hf_oss_fragment_multiple_tails = -1;
+static int hf_oss_fragment_too_long_fragment = -1;
+static int hf_oss_fragment_error = -1;
+static int hf_oss_fragment_count = -1;
+static int hf_oss_reassembled_in = -1;
+static int hf_oss_reassembled_length = -1;
+static int hf_oss_reassembled_data = -1;
+
+static gint ett_opensafety_ssdo_fragment = -1;
+static gint ett_opensafety_ssdo_fragments = -1;
+
+/* Definitions for the openSAFETY ov. UDP transport protocol */
+static dissector_handle_t opensafety_udptransport_handle = NULL;
+
+static int proto_oss_udp_transport = -1;
+
+static int hf_oss_udp_transport_version = -1;
+static int hf_oss_udp_transport_flags_type = -1;
+static int hf_oss_udp_transport_counter = -1;
+static int hf_oss_udp_transport_sender = -1;
+static int hf_oss_udp_transport_datapoint = -1;
+static int hf_oss_udp_transport_length= -1;
+
+static gint ett_oss_udp_transport = -1;
+
+static const true_false_string tfs_udp_transport_cyclic_acyclic = { "Cyclic", "ACyclic" };
+static guint global_network_oss_udp_port = OPENSAFETY_UDP_PORT;
+
+static int opensafety_tap = -1;
+
+static const fragment_items oss_frag_items = {
+ /* Fragment subtrees */
+ &ett_opensafety_ssdo_fragment,
+ &ett_opensafety_ssdo_fragments,
+ /* Fragment fields */
+ &hf_oss_fragments,
+ &hf_oss_fragment,
+ &hf_oss_fragment_overlap,
+ &hf_oss_fragment_overlap_conflicts,
+ &hf_oss_fragment_multiple_tails,
+ &hf_oss_fragment_too_long_fragment,
+ &hf_oss_fragment_error,
+ &hf_oss_fragment_count,
+ /* Reassembled in field */
+ &hf_oss_reassembled_in,
+ /* Reassembled length field */
+ &hf_oss_reassembled_length,
+ /* Reassembled data */
+ &hf_oss_reassembled_data,
+ /* Tag */
+ "Message fragments"
+};
+
+static const char *global_scm_udid = "00:00:00:00:00:00";
+
+static dissector_handle_t data_dissector = NULL;
+static dissector_handle_t opensafety_udpdata_handle = NULL;
+static dissector_handle_t opensafety_mbtcp_handle = NULL;
+static dissector_handle_t opensafety_pnio_handle = NULL;
+
+static gboolean global_display_intergap_data = FALSE;
+static gboolean global_scm_udid_autoset = TRUE;
+static gboolean global_udp_frame2_first = FALSE;
+static gboolean global_siii_udp_frame2_first = FALSE;
+static gboolean global_mbtcp_big_endian = FALSE;
+static guint global_network_udp_port = OPENSAFETY_UDP_PORT;
+static guint global_network_udp_port_sercosiii = OPENSAFETY_UDP_PORT_SIII;
+static gboolean global_classify_transport = TRUE;
+
+static gboolean global_enable_udp = TRUE;
+static gboolean global_enable_mbtcp = TRUE;
+
+static gboolean global_opensafety_debug_verbose = FALSE;
+
+static const char * global_filter_nodes = "";
+static gboolean global_show_only_node_in_filter = TRUE;
+static wmem_list_t * global_filter_list = NULL;
+
+static gboolean heuristic_siii_dissection_enabled = TRUE;
+
+static heur_dissector_list_t heur_opensafety_spdo_subdissector_list;
+
+static gboolean bDissector_Called_Once_Before = FALSE;
+/* Using local_scm_udid as read variable for global_scm_udid, to
+ * enable automatic detection of scm udid */
+static char *local_scm_udid = NULL;
+
+static reassembly_table os_reassembly_table;
+
+/* Resets the dissector in case the dissection is malformed and the dissector crashes */
+static void
+reset_dissector(void)
+{
+ bDissector_Called_Once_Before = FALSE;
+}
+
+static void
+setup_dissector(void)
+{
+ heur_dtbl_entry_t * heur_entry = NULL;
+
+ /* create list if it does not exist, but clean existing elements anyway,
+ * as options might have changed */
+ global_filter_list = wmem_list_new(wmem_file_scope());
+
+ gchar ** vector = wmem_strsplit(wmem_file_scope(), global_filter_nodes, ",", -1);
+ for (; NULL != *vector; vector++ )
+ {
+ if ( *vector && g_ascii_strtoll(*vector, NULL, 10) > 0 )
+ wmem_list_append(global_filter_list, GINT_TO_POINTER(g_ascii_strtoll(*vector, NULL, 10)));
+ }
+
+ heur_entry = find_heur_dissector_by_unique_short_name("opensafety_sercosiii");
+ if ( heur_entry != NULL )
+ heuristic_siii_dissection_enabled = heur_entry->enabled;
+}
+
+static void
+cleanup_dissector(void)
+{
+ local_scm_udid = NULL;
+
+ if ( global_filter_list )
+ {
+ wmem_destroy_list(global_filter_list);
+ global_filter_list = NULL;
+ }
+}
+
+void proto_register_opensafety(void);
+void proto_reg_handoff_opensafety(void);
+
+/* Conversation functions */
+
+/* This is defined by the specification. The Address field is 10 bits long, and the node with the number
+ * 1 is always the SCM, therefore ( 2 ^ 10 ) - 1 nodes can be addressed. We use 2 ^ 10 here, because the
+ * SCM can talk to himself (Assign SADR for instance ) */
+/* #define MAX_NUMBER_OF_SAFETY_NODES ( 1 << 10 ) */
+
+/* Tracks the information that the packet pinfo has been received by receiver, and adds that information to the tree, using pos, as
+ * byte position in the PDU */
+static void
+opensafety_packet_node(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree,
+ gint hf_field, guint16 saddr, guint16 posInFrame, guint16 posSdnInFrame, guint16 sdn )
+{
+ proto_item *psf_item = NULL;
+ proto_tree *psf_tree = NULL;
+
+ psf_item = proto_tree_add_uint(tree, hf_field, message_tvb, posInFrame, 2, saddr);
+ psf_tree = proto_item_add_subtree(psf_item, ett_opensafety_node);
+ psf_item = proto_tree_add_uint(psf_tree, hf_oss_msg_node, message_tvb, posInFrame, 2, saddr);
+ proto_item_set_generated(psf_item);
+
+ if ( sdn > 0 )
+ {
+ psf_item = proto_tree_add_uint(psf_tree, hf_oss_msg_network, message_tvb,
+ posSdnInFrame, 2, sdn);
+ } else if ( sdn <= 0 ) {
+ psf_item = proto_tree_add_uint(psf_tree, hf_oss_msg_network, message_tvb,
+ posSdnInFrame, 2, sdn * -1);
+ expert_add_info(pinfo, psf_item, &ei_scmudid_unknown );
+ }
+ proto_item_set_generated(psf_item);
+}
+
+static void
+opensafety_packet_receiver(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree, proto_item *opensafety_item,
+ opensafety_packet_info *packet, guint16 recv,
+ guint16 posInFrame, guint16 posSdnInFrame, guint16 sdn )
+{
+ packet->receiver = recv;
+ if ( sdn > 0 )
+ packet->sdn = sdn;
+
+ opensafety_packet_node (message_tvb, pinfo, tree, hf_oss_msg_receiver, recv, posInFrame, posSdnInFrame, sdn );
+ proto_item_append_text(opensafety_item, ", Dst: 0x%03X (%d)", recv, recv);
+}
+
+/* Tracks the information that the packet pinfo has been sent by sender, and received by everyone else, and adds that information to
+ * the tree, using pos, as byte position in the PDU */
+static void
+opensafety_packet_sender(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree, proto_item *opensafety_item,
+ opensafety_packet_info *packet, guint16 sender,
+ guint16 posInFrame, guint16 posSdnInFrame, guint16 sdn )
+{
+ packet->sender = sender;
+ if ( sdn > 0 )
+ packet->sdn = sdn;
+
+ opensafety_packet_node (message_tvb, pinfo, tree, hf_oss_msg_sender, sender, posInFrame, posSdnInFrame, sdn );
+ proto_item_append_text(opensafety_item, ", Src: 0x%03X (%d)", sender, sender);
+}
+
+/* Tracks the information that the packet pinfo has been sent by sender, and received by receiver, and adds that information to
+ * the tree, using pos for the sender and pos2 for the receiver, as byte position in the PDU */
+static void
+opensafety_packet_sendreceiv(tvbuff_t * message_tvb, packet_info *pinfo, proto_tree *tree, proto_item *opensafety_item,
+ opensafety_packet_info *packet, guint16 send, guint16 pos,
+ guint16 recv, guint16 pos2, guint16 posnet, guint16 sdn)
+{
+ opensafety_packet_receiver(message_tvb, pinfo, tree, opensafety_item, packet, recv, pos2, posnet, sdn);
+ opensafety_packet_sender(message_tvb, pinfo, tree, opensafety_item, packet, send, pos, posnet, sdn);
+}
+
+static proto_item *
+opensafety_packet_response(tvbuff_t *message_tvb, proto_tree *sub_tree, opensafety_packet_info *packet, gboolean isResponse)
+{
+ proto_item *item = NULL;
+ guint8 b_id = 0;
+
+ if ( packet->msg_type != OPENSAFETY_SPDO_MESSAGE_TYPE )
+ {
+ proto_tree_add_item(sub_tree, hf_oss_msg, message_tvb,
+ OSS_FRAME_POS_ID + packet->frame.subframe1, 1, ENC_NA );
+ }
+ else
+ {
+ /* SPDOs code the connection valid bit on offset 0x04. SSDO and SNMT frames use this
+ * bit for messages. Therefore setting a bitmask on the hf-field would not work. */
+ b_id = OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) & 0xF8;
+ proto_tree_add_uint(sub_tree, hf_oss_msg, message_tvb, OSS_FRAME_POS_ID + packet->frame.subframe1, 1, b_id);
+ }
+
+ 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(packet_info *pinfo, 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(pinfo->pool, 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(pinfo->pool, 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(pinfo->pool, opensafety_packet_spdo);
+
+ return proto_item_add_subtree(item, ett_tree);
+}
+
+static guint16
+findFrame1Position ( packet_info *pinfo, 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(pinfo->pool, 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 ( packet_info *pinfo, 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 = 0;
+ guint8 b_Length = 0, b_CTl = 0, crcOffset = 0, crc1Type = 0;
+ guint8 *bytes;
+ guint b_ID = 0;
+ 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 ( 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(pinfo->pool, 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 )
+ {
+ 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_length_caplen(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 * opensafety_item )
+{
+ proto_item *item, *diritem;
+ proto_tree *spdo_tree, *spdo_flags_tree;
+ guint16 ct, addr;
+ 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;
+
+ /* Determine the producer and set it, as opensafety_packet_node does not */
+ addr = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1);
+ packet->sender = addr;
+
+ opensafety_packet_node ( message_tvb, pinfo, opensafety_tree, hf_oss_msg_sender,
+ addr, OSS_FRAME_POS_ADDR + packet->frame.subframe1, packet->frame.subframe2, sdn );
+ proto_item_append_text(opensafety_item, "; Producer: 0x%03X (%d)", addr, addr);
+
+ spdo_tree = opensafety_packet_payloadtree ( pinfo, 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;
+ if ( global_opensafety_debug_verbose )
+ 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);
+
+ proto_tree_add_item( sod_tree, hf_oss_sod_par_timestamp, new_tvb, 0, 4, ENC_LITTLE_ENDIAN );
+
+ /* 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 )
+ {
+ proto_tree_add_item( sod_tree, hf_oss_sod_par_timestamp, new_tvb, ctr + 5, 4, ENC_LITTLE_ENDIAN );
+
+ /* 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 ) {
+ proto_tree_add_item( sod_tree, hf_oss_sod_par_timestamp, new_tvb, ctr + 5, 4, ENC_LITTLE_ENDIAN );
+ } 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);
+
+ proto_tree_add_item(ext_tree, hf_oss_ssdo_sod_index, new_tvb, ctr + 7, 2, ENC_LITTLE_ENDIAN);
+ 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 * opensafety_item )
+{
+ 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 int * const 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, opensafety_item, 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, opensafety_item, 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, opensafety_item, 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 ( pinfo, 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_str(pinfo->cinfo, COL_INFO, "]");
+ 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 ( calcDataLength >= 0 )
+ {
+ 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 );
+ }
+ }
+
+ proto_tree_add_item(ssdo_tree, hf_oss_ssdo_payload, message_tvb, payloadOffset, calcDataLength, ENC_NA );
+ } else {
+ if ( global_opensafety_debug_verbose )
+ 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 ((gint)dataLength < (payloadOffset - db0Offset))
+ {
+ if ( global_opensafety_debug_verbose )
+ expert_add_info_format(pinfo, opensafety_item, &ei_payload_length_not_positive,
+ "Calculation for payload length yielded non-positive result [%d]", (gint)payloadSize );
+ return;
+ }
+
+ 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 )
+ {
+ proto_tree_add_item( ssdo_tree, hf_oss_sod_par_timestamp, message_tvb, payloadOffset, 4, ENC_LITTLE_ENDIAN );
+ 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 ) {
+ proto_tree_add_item ( ssdo_tree, hf_oss_sod_par_timestamp, message_tvb, payloadOffset, 4, ENC_LITTLE_ENDIAN );
+ } else
+ proto_tree_add_item(ssdo_tree, hf_oss_ssdo_payload, message_tvb, payloadOffset, payloadSize, ENC_NA );
+ }
+ }
+
+ pinfo->fragmented = saveFragmented;
+ }
+ }
+}
+
+static void
+opensafety_parse_scm_udid ( tvbuff_t* tvb, packet_info *pinfo, proto_tree *tree,
+ opensafety_packet_info *packet, guint offset )
+{
+ proto_item * item = NULL;
+ gchar *scm_udid_test = NULL;
+
+ item = proto_tree_add_item(tree, hf_oss_snmt_udid, tvb, offset, 6, ENC_NA);
+
+ scm_udid_test = tvb_bytes_to_str_punct(pinfo->pool, tvb, offset, 6, ':' );
+
+ if ( scm_udid_test != NULL && strlen( scm_udid_test ) == 17 )
+ {
+ if ( g_strcmp0("00:00:00:00:00:00", scm_udid_test ) != 0 )
+ {
+ packet->payload.snmt->scm_udid = scm_udid_test;
+
+ if ( ( global_scm_udid_autoset == TRUE ) && ( memcmp ( global_scm_udid, scm_udid_test, 17 ) != 0 ) )
+ {
+ if ( local_scm_udid == NULL || memcmp ( local_scm_udid, scm_udid_test, 17 ) != 0 )
+ {
+ local_scm_udid = wmem_strdup(wmem_file_scope(), scm_udid_test );
+ if ( global_opensafety_debug_verbose )
+ expert_add_info_format(pinfo, item, &ei_scmudid_autodetected,
+ "Auto detected payload as SCM UDID [%s].", local_scm_udid);
+ }
+ }
+ }
+ }
+}
+
+static void
+dissect_opensafety_snmt_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *opensafety_tree,
+ opensafety_packet_info *packet, proto_item * opensafety_item )
+{
+ proto_tree *snmt_tree;
+ 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, opensafety_item, packet, addr,
+ OSS_FRAME_POS_ADDR + packet->frame.subframe1, packet->frame.subframe2, sdn );
+ }
+ else
+ {
+ opensafety_packet_sendreceiv ( message_tvb, pinfo, opensafety_tree, opensafety_item, packet, taddr,
+ packet->frame.subframe2 + 3, addr, OSS_FRAME_POS_ADDR + packet->frame.subframe1,
+ packet->frame.subframe2, sdn );
+ }
+
+ snmt_tree = opensafety_packet_payloadtree ( pinfo, 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);
+ }
+
+ /* Handle Acknowledge and Fail specifically */
+ if ( ( ( db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_ACKNOWLEDGE) == 0 ) || ( db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_FAIL) == 0 )
+ {
+ byte = tvb_get_guint8(message_tvb, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1);
+
+ /* Handle a normal SN Fail */
+ if ( byte != OPENSAFETY_ERROR_GROUP_ADD_PARAMETER )
+ {
+ if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_FAIL) == 0 )
+ {
+ 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 if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_ACKNOWLEDGE) == 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"));
+ }
+
+ 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
+ {
+ if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_FAIL) == 0 )
+ {
+ 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"));
+ } else if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_ACKNOWLEDGE) == 0 )
+ {
+ 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, "Additional parameter missing [Response via SN Acknowledge] (0x%02X)", packet->payload.snmt->ext_msg_id);
+ col_append_str(pinfo->cinfo, COL_INFO, ", Additional parameter missing");
+ }
+
+ 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 ( (OSS_FRAME_ID_T(message_tvb, packet->frame.subframe1) ^ OPENSAFETY_MSG_SNMT_SERVICE_RESPONSE) == 0 )
+ {
+ 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"));
+
+ if ( (db0 ^ OPENSAFETY_MSG_SNMT_EXT_SN_ASSIGNED_UDID_SCM) == 0 )
+ {
+ opensafety_parse_scm_udid ( message_tvb, pinfo, snmt_tree, packet, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1 );
+ }
+ 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"));
+
+ 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 )
+ {
+ opensafety_parse_scm_udid ( message_tvb, pinfo, snmt_tree, packet, OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1 );
+ }
+ 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 )
+ {
+ proto_tree_add_item ( snmt_tree, hf_oss_sod_par_timestamp, message_tvb,
+ OSS_FRAME_POS_DATA + packet->frame.subframe1 + 1, 4, ENC_LITTLE_ENDIAN );
+ }
+ 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(pinfo->pool,
+ tvb_bytes_to_str_punct(pinfo->pool, 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(pinfo->pool, 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(pinfo->pool, 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 ( global_opensafety_debug_verbose && ( 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 gint
+check_scmudid_validity(opensafety_packet_info *packet, tvbuff_t *message_tvb)
+{
+ guint8 b_ID, spdoFlags, udidLen;
+ GByteArray *scmUDID = NULL;
+
+ 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 = tvb_get_guint8(message_tvb, packet->frame.subframe2 + 1) ^ (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);
+ }
+
+ udidLen = scmUDID->len;
+
+ g_byte_array_free( scmUDID, TRUE);
+
+ return udidLen;
+}
+
+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 previous_msg_id)
+{
+ guint8 ctr, udidLen;
+ proto_item *item;
+ gboolean messageTypeUnknown, crcValid;
+
+ messageTypeUnknown = FALSE;
+
+ for ( ctr = 0; ctr < 6; ctr++ )
+ packet->scm_udid[ctr] = 0;
+
+ packet->saddr = OSS_FRAME_ADDR_T(message_tvb, packet->frame.subframe1);
+ /* Sender / Receiver is determined by message type */
+ packet->sender = 0;
+ packet->receiver = 0;
+
+ /* SPDO is handled below */
+ if ( packet->msg_type != OPENSAFETY_SPDO_MESSAGE_TYPE )
+ {
+ 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) "));
+ }
+
+ item = proto_tree_add_uint(opensafety_tree, hf_oss_byte_offset, packet->frame.frame_tvb, 0, 1, packet->frame.byte_offset);
+ proto_item_set_generated(item);
+
+ if ( packet->msg_type == OPENSAFETY_SNMT_MESSAGE_TYPE )
+ {
+ proto_item_append_text(opensafety_item, ", SNMT");
+ dissect_opensafety_snmt_message ( message_tvb, pinfo, opensafety_tree, packet, opensafety_item );
+ }
+ else
+ {
+ udidLen = check_scmudid_validity(packet, message_tvb);
+
+ if ( strlen( (local_scm_udid != NULL ? local_scm_udid : global_scm_udid) ) > 0 && udidLen == 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 ( udidLen != 6 )
+ expert_add_info(pinfo, item, &ei_scmudid_invalid_preference );
+ proto_item_set_generated(item);
+
+ if ( packet->msg_type == OPENSAFETY_SSDO_MESSAGE_TYPE || packet->msg_type == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE )
+ {
+ proto_item_append_text(opensafety_item,
+ (packet->msg_type == OPENSAFETY_SLIM_SSDO_MESSAGE_TYPE) ? ", Slim SSDO" : ", SSDO");
+ dissect_opensafety_ssdo_message ( message_tvb, pinfo, opensafety_tree, packet, opensafety_item );
+ }
+ else if ( packet->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE )
+ {
+ proto_item_append_text(opensafety_item, ", SPDO" );
+ dissect_opensafety_spdo_message ( message_tvb, pinfo, opensafety_tree, packet, opensafety_item );
+
+ /* Now we know packet->sender, therefore we can add the info text */
+ if ( previous_msg_id != packet->msg_id )
+ {
+ col_append_fstr(pinfo->cinfo, COL_INFO, (u_nrInPackage > 1 ? " | %s - 0x%03X" : "%s - 0x%03X" ),
+ val_to_str(packet->msg_id, opensafety_message_type_values, "Unknown Message (0x%02X) "),
+ packet->sender );
+ } else {
+ col_append_fstr(pinfo->cinfo, COL_INFO, ", 0x%03X", packet->sender );
+ }
+ }
+ else
+ {
+ messageTypeUnknown = TRUE;
+ proto_item_append_text(opensafety_item, ", Unknown" );
+ }
+ }
+
+ 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 const char* opensafety_conv_get_filter_type(conv_item_t* conv, conv_filter_type_e filter)
+{
+ if (filter == CONV_FT_SRC_ADDRESS) {
+ if (conv->src_address.type == AT_NUMERIC)
+ return "opensafety.msg.sender";
+ }
+
+ if (filter == CONV_FT_DST_ADDRESS) {
+ if (conv->dst_address.type == AT_NUMERIC)
+ return "opensafety.msg.receiver";
+ }
+
+ if (filter == CONV_FT_ANY_ADDRESS) {
+ if (conv->src_address.type == AT_NUMERIC && conv->dst_address.type == AT_NUMERIC)
+ return "opensafety.msg.node";
+ }
+
+ return CONV_FILTER_INVALID;
+}
+
+static ct_dissector_info_t opensafety_ct_dissector_info = {&opensafety_conv_get_filter_type};
+
+static const char* opensafety_get_filter_type(endpoint_item_t* endpoint, conv_filter_type_e filter)
+{
+ if (endpoint->myaddress.type == AT_NUMERIC) {
+ if (filter == CONV_FT_ANY_ADDRESS)
+ return "opensafety.msg.node";
+ else if (filter == CONV_FT_SRC_ADDRESS)
+ return "opensafety.msg.sender";
+ else if (filter == CONV_FT_DST_ADDRESS)
+ return "opensafety.msg.receiver";
+ }
+
+ return CONV_FILTER_INVALID;
+}
+
+static et_dissector_info_t opensafety_dissector_info = {&opensafety_get_filter_type};
+
+static tap_packet_status
+opensafety_conversation_packet(void *pct, packet_info *pinfo,
+ epan_dissect_t *edt _U_, const void *vip, tap_flags_t flags)
+{
+ address *src = wmem_new0(pinfo->pool, address);
+ address *dst = wmem_new0(pinfo->pool, address);
+ conv_hash_t *hash = (conv_hash_t*) pct;
+ const opensafety_packet_info *osinfo = (const opensafety_packet_info *)vip;
+ guint16 receiver = GUINT16_FROM_LE(osinfo->receiver);
+ if (osinfo->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE)
+ receiver = OSS_BROADCAST_ADDRESS;
+ guint16 sender = GUINT16_FROM_LE(osinfo->sender);
+
+ hash->flags = flags;
+
+ alloc_address_wmem(pinfo->pool, src, AT_NUMERIC, (int) sizeof(guint16), &sender);
+ alloc_address_wmem(pinfo->pool, dst, AT_NUMERIC, (int) sizeof(guint16), &receiver);
+
+ add_conversation_table_data(hash, src, dst, 0, 0, 1, osinfo->msg_len, &pinfo->rel_ts, &pinfo->abs_ts,
+ &opensafety_ct_dissector_info, CONVERSATION_NONE);
+
+ return TAP_PACKET_REDRAW;
+}
+
+static tap_packet_status
+opensafety_endpoint_packet(void *pit, packet_info *pinfo,
+ epan_dissect_t *edt _U_, const void *vip, tap_flags_t flags)
+{
+ address *src = wmem_new0(pinfo->pool, address);
+ address *dst = wmem_new0(pinfo->pool, address);
+ conv_hash_t *hash = (conv_hash_t*) pit;
+ const opensafety_packet_info *osinfo = (const opensafety_packet_info *)vip;
+ guint16 receiver = GUINT16_FROM_LE(osinfo->receiver);
+ if (osinfo->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE)
+ receiver = OSS_BROADCAST_ADDRESS;
+ guint16 sender = GUINT16_FROM_LE(osinfo->sender);
+
+ hash->flags = flags;
+
+ alloc_address_wmem(pinfo->pool, src, AT_NUMERIC, (int) sizeof(guint16), &sender);
+ alloc_address_wmem(pinfo->pool, dst, AT_NUMERIC, (int) sizeof(guint16), &receiver);
+
+ add_endpoint_table_data(hash, src, 0, TRUE, 1, osinfo->msg_len, &opensafety_dissector_info, ENDPOINT_NONE);
+ add_endpoint_table_data(hash, dst, 0, FALSE, 1, osinfo->msg_len, &opensafety_dissector_info, ENDPOINT_NONE);
+
+ return TAP_PACKET_REDRAW;
+}
+
+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, previous_msg_id;
+ 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;
+ previous_msg_id = 0;
+
+ /* 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(pinfo->pool, opensafety_packet_info);
+
+ /* Finding the start of the first possible safety frame */
+ if ( findSafetyFrame(pinfo, 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 (pinfo, 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(pinfo, 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 != OPENSAFETY_ANY_TRANSPORT )
+ {
+ /* 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;
+ }
+
+ /* SPDO Reserved is invalid, therefore all packages using this ID can be discarded */
+ if ( OSS_FRAME_ID_T(message_tvb, byte_offset + frameStart1) == OPENSAFETY_MSG_SPDO_RESERVED )
+ {
+ frameOffset += 2;
+ found--;
+ continue;
+ }
+ }
+
+ /* Filter node list */
+ gint addr = OSS_FRAME_ADDR_T(message_tvb, byte_offset + frameStart1);
+ if ( global_filter_list && wmem_list_count ( global_filter_list ) > 0 )
+ {
+ gboolean found_in_list = wmem_list_find(global_filter_list, GINT_TO_POINTER( addr )) ? TRUE : FALSE;
+
+ if ( ( ! global_show_only_node_in_filter && found_in_list ) ||
+ ( global_show_only_node_in_filter && ! found_in_list ) )
+ {
+ opensafety_item = proto_tree_add_item(tree, proto_opensafety, message_tvb, frameOffset, frameLength, ENC_NA);
+ proto_item_append_text(opensafety_item, ", Filtered Node: 0x%03X (%d)", addr, addr);
+ frameOffset += 2;
+ found--;
+ continue;
+ }
+ }
+
+ /* 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_length_caplen(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_length_caplen ( 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.byte_offset = frameOffset + tvb_raw_offset(message_tvb);
+ packet->frame.subframe1 = frameStart1;
+ packet->frame.subframe2 = frameStart2;
+ packet->frame.length = frameLength;
+ packet->frame.malformed = FALSE;
+
+ /* Clearing connection valid bit */
+ if ( packet->msg_type == OPENSAFETY_SPDO_MESSAGE_TYPE )
+ packet->msg_id = packet->msg_id & 0xF8;
+
+ if ( dissect_opensafety_message(packet, next_tvb, pinfo, opensafety_item, opensafety_tree, found, previous_msg_id) != TRUE )
+ markAsMalformed = TRUE;
+
+ previous_msg_id = packet->msg_id;
+
+ 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_length_caplen(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;
+
+ /* 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 synchronous 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(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void *data _U_ )
+{
+ gboolean result = FALSE;
+ gboolean udp = FALSE;
+ guint8 firstByte;
+
+ /* The UDP dissection is not done by a heuristic, but rather by a normal dissector. But
+ * the customer may not expect, that if (s)he disables the SercosIII dissector, that the
+ * SercosIII UDP packages get still dissected. This will disable them as well. */
+ if ( ! heuristic_siii_dissection_enabled )
+ return FALSE;
+
+ /* 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 )
+ {
+ udp = pinfo->destport == OPENSAFETY_UDP_PORT_SIII;
+
+ 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 ( udp || ( firstByte & 0x40 ) == 0x40 )
+ {
+ result = opensafety_package_dissector( "openSAFETY/SercosIII",
+ udp ? "" : "sercosiii",
+ FALSE, FALSE, 0, message_tvb, pinfo, tree,
+ udp ? OPENSAFETY_ACYCLIC_DATA : 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;
+
+ /* 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, OPENSAFETY_ANY_TRANSPORT);
+ 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 ),
+ OPENSAFETY_ANY_TRANSPORT);
+}
+
+static gboolean
+opensafety_udp_transport_dissector(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
+{
+ proto_item *ti = NULL;
+ proto_tree *transport_tree = NULL;
+ gint offset = 0;
+ tvbuff_t *os_tvb = 0;
+
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "openSAFETY over UDP");
+ col_clear(pinfo->cinfo, COL_INFO);
+
+ ti = proto_tree_add_item(tree, proto_oss_udp_transport, message_tvb, 0, -1, ENC_NA);
+ transport_tree = proto_item_add_subtree(ti, ett_opensafety);
+
+ proto_tree_add_item(transport_tree, hf_oss_udp_transport_version, message_tvb, 0, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(transport_tree, hf_oss_udp_transport_flags_type, message_tvb, 1, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(transport_tree, hf_oss_udp_transport_counter, message_tvb, 2, 2, ENC_LITTLE_ENDIAN);
+
+ proto_tree_add_item(transport_tree, hf_oss_udp_transport_sender, message_tvb, 4, 4, ENC_LITTLE_ENDIAN);
+ proto_tree_add_item(transport_tree, hf_oss_udp_transport_datapoint, message_tvb, 8, 2, ENC_LITTLE_ENDIAN);
+ proto_tree_add_item(transport_tree, hf_oss_udp_transport_length, message_tvb, 10, 2, ENC_LITTLE_ENDIAN);
+ offset += 12;
+
+ os_tvb = tvb_new_subset_remaining(message_tvb, offset);
+
+ if ( ! opensafety_package_dissector("openSAFETY/UDP", "", FALSE,
+ FALSE, 0, os_tvb, pinfo, tree, OPENSAFETY_ANY_TRANSPORT ) )
+ call_dissector(find_dissector("data"), os_tvb, pinfo, transport_tree);
+
+ return TRUE;
+}
+
+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;
+
+ gboolean frameFound = FALSE;
+ guint frameOffset = 0;
+ guint frameLength = 0;
+
+ if ( pinfo->destport == OPENSAFETY_UDP_PORT_SIII )
+ return dissect_opensafety_siii(message_tvb, pinfo, tree, data);
+
+ 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->num != frameNum )
+ {
+ frameIdx = 0;
+ frameNum = pinfo->num;
+ }
+
+ /* check for openSAFETY frame at beginning of data */
+
+ frameFound = findSafetyFrame(pinfo, message_tvb, 0, global_udp_frame2_first, &frameOffset, &frameLength, NULL );
+ if ( ! frameFound || ( frameOffset >= 11 ) )
+ {
+ dissector_handle_t udp_transport = find_dissector ( "opensafety_udp_transport" );
+ if ( udp_transport != NULL )
+ call_dissector(udp_transport, message_tvb, pinfo, tree);
+ result = opensafety_udp_transport_dissector(message_tvb, pinfo, tree);
+ }
+ else
+ result = opensafety_package_dissector("openSAFETY/UDP", "", global_udp_frame2_first,
+ FALSE, frameIdx, message_tvb, pinfo, tree, OPENSAFETY_ACYCLIC_DATA );
+
+ if ( result )
+ frameIdx++;
+
+ return result;
+}
+
+static void
+apply_prefs ( void )
+{
+ 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 )
+ {
+ /* Delete dissectors in preparation of a changed config setting */
+ dissector_delete_uint ("udp.port", opensafety_udp_port_number, opensafety_udptransport_handle);
+ dissector_delete_uint ("udp.port", opensafety_udp_siii_port_number, opensafety_udpdata_handle);
+ }
+ opensafety_init = TRUE;
+
+ /* 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, will hand traffic to SIII dissector if needed */
+ /* Preference names to specific to use "auto" preference */
+ dissector_add_uint("udp.port", opensafety_udp_port_number, opensafety_udptransport_handle);
+ dissector_add_uint("udp.port", opensafety_udp_siii_port_number, opensafety_udpdata_handle);
+}
+
+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_byte_offset,
+ { "Byte Offset", "opensafety.msg.byte_offset",
+ FT_UINT16, BASE_HEX, 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_UINT16, 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_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
+ { &hf_oss_ssdo_extpar_tstamp,
+ { "Timestamp", "opensafety.ssdo.extpar.timestamp",
+ FT_UINT32, 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 list of header fields */
+ static hf_register_info hf_oss_udp_transport[] = {
+ /* UDP transport specific fields */
+ { &hf_oss_udp_transport_version,
+ { "Transport Version", "opensafety.udp_transport.version",
+ FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
+ { &hf_oss_udp_transport_flags_type,
+ { "Data Type", "opensafety.udp_transport.flags.type",
+ FT_BOOLEAN, 8, TFS(&tfs_udp_transport_cyclic_acyclic), 0x01, NULL, HFILL } },
+ { &hf_oss_udp_transport_counter,
+ { "Counter", "opensafety.udp_transport.counter",
+ FT_UINT16, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL } },
+ { &hf_oss_udp_transport_sender,
+ { "Sender ID", "opensafety.udp_transport.sender",
+ FT_UINT32, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL } },
+ { &hf_oss_udp_transport_datapoint,
+ { "Datapoint ID", "opensafety.udp_transport.datapoint",
+ FT_UINT16, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL } },
+ { &hf_oss_udp_transport_length,
+ { "Length", "opensafety.udp_transport.length",
+ FT_UINT16, BASE_DEC, NULL, 0x0, 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 gint *ett_oss_udp[] = {
+ &ett_oss_udp_transport,
+ };
+
+ 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, *oss_udp_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);
+ proto_oss_udp_transport = proto_register_protocol("openSAFETY over UDP", "openSAFETY ov. UDP", "opensafety_udp");
+ oss_udp_module = prefs_register_protocol(proto_oss_udp_transport, apply_prefs);
+
+ /* Register data dissector */
+ heur_opensafety_spdo_subdissector_list = register_heur_dissector_list("opensafety.spdo", proto_opensafety);
+
+ /* 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));
+ proto_register_field_array(proto_oss_udp_transport, hf_oss_udp_transport, array_length(hf_oss_udp_transport));
+ proto_register_subtree_array(ett_oss_udp, array_length(ett_oss_udp));
+
+ /* 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_string_preference(opensafety_module, "filter_nodes",
+ "Filter openSAFETY Nodes",
+ "A comma-separated list of nodes to be filtered during dissection",
+ &global_filter_nodes);
+ prefs_register_bool_preference(opensafety_module, "filter_show_nodes_in_filterlist",
+ "Show nodes in filter, hide otherwise",
+ "If set to true, only nodes in the list will be shown, otherwise they will be hidden",
+ &global_show_only_node_in_filter);
+
+ 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, "debug_verbose",
+ "openSAFETY print all dissection information",
+ "Enables additional information in the dissection for better debugging an openSAFETY trace",
+ &global_opensafety_debug_verbose );
+
+ prefs_register_obsolete_preference(opensafety_module, "enable_plk");
+ prefs_register_obsolete_preference(opensafety_module, "enable_siii");
+ prefs_register_obsolete_preference(opensafety_module, "enable_pnio");
+
+ 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_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);
+
+ prefs_register_uint_preference(oss_udp_module, "network_udp_port",
+ "Port used for UDP Transport",
+ "Port used by the openSAFETY over UDP data transport", 10,
+ &global_network_oss_udp_port);
+
+ /* Registering default and ModBus/TCP dissector */
+ opensafety_udpdata_handle = register_dissector("opensafety_udp", dissect_opensafety_udpdata, proto_opensafety );
+ opensafety_udptransport_handle =
+ register_dissector("opensafety_udptransport", dissect_opensafety_udpdata, proto_oss_udp_transport );
+ opensafety_mbtcp_handle = register_dissector("opensafety_mbtcp", dissect_opensafety_mbtcp, proto_opensafety );
+ opensafety_pnio_handle = register_dissector("opensafety_pnio", dissect_opensafety_pn_io, proto_opensafety);
+
+ register_conversation_table(proto_opensafety, TRUE, opensafety_conversation_packet, opensafety_endpoint_packet);
+}
+
+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);
+
+ /* Modbus TCP dissector registration */
+ dissector_add_string("modbus.data", "data", opensafety_mbtcp_handle);
+
+ /* 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, opensafety_pnio_handle);
+ }
+
+ apply_prefs();
+
+ register_init_routine ( setup_dissector );
+ register_cleanup_routine ( cleanup_dissector );
+
+ reassembly_table_register(&os_reassembly_table, &addresses_reassembly_table_functions);
+
+ /* registering frame end routine, to prevent a malformed dissection preventing
+ * further dissector calls (see bug #6950) */
+ /* register_frame_end_routine(reset_dissector); */
+}
+
+/*
+ * Editor modelines - https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-22 17:55:47 +0000