diff options
Diffstat (limited to 'epan/dissectors/packet-isobus.c')
| -rw-r--r-- | epan/dissectors/packet-isobus.c | 872 |
1 files changed, 872 insertions, 0 deletions
diff --git a/epan/dissectors/packet-isobus.c b/epan/dissectors/packet-isobus.c new file mode 100644 index 0000000000..3c11ed4d78 --- /dev/null +++ b/epan/dissectors/packet-isobus.c @@ -0,0 +1,872 @@ +/* packet-isobus.c + * Routines for ISObus dissection (Based on CANOpen Dissector) + * Copyright 2016, Jeroen Sack <jsack@lely.com> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/reassemble.h> +#include <epan/dissectors/packet-socketcan.h> +#include <epan/wmem/wmem_map.h> + +void proto_register_isobus(void); +void proto_reg_handoff_isobus(void); + +/* Initialize the protocol and registered fields */ +static int proto_isobus = -1; +static int hf_isobus_can_id = -1; +static int hf_isobus_priority = -1; +static int hf_isobus_ext_data_page = -1; +static int hf_isobus_src_addr = -1; +static int hf_isobus_data_page = -1; +static int hf_isobus_pdu_format_dp0 = -1; +static int hf_isobus_pdu_format_dp1 = -1; +static int hf_isobus_dst_addr = -1; +static int hf_isobus_group_extension = -1; +static int hf_isobus_transportprotocol_controlbyte = -1; +static int hf_isobus_transportprotocol_requesttosend_totalsize = -1; +static int hf_isobus_transportprotocol_requesttosend_numberofpackets = -1; +static int hf_isobus_transportprotocol_requesttosend_maximumpackets = -1; +static int hf_isobus_transportprotocol_requesttosend_pgn = -1; +static int hf_isobus_transportprotocol_cleartosend_numberofpacketscanbesent = -1; +static int hf_isobus_transportprotocol_cleartosend_nextpacketnumber = -1; +static int hf_isobus_transportprotocol_cleartosend_pgn = -1; +static int hf_isobus_transportprotocol_endofmsgack_totalsize = -1; +static int hf_isobus_transportprotocol_endofmsgack_numberofpackets = -1; +static int hf_isobus_transportprotocol_endofmsgack_pgn = -1; +static int hf_isobus_transportprotocol_connabort_abortreason = -1; +static int hf_isobus_transportprotocol_connabort_pgn = -1; +static int hf_isobus_transportprotocol_broadcastannouncemessage_totalsize = -1; +static int hf_isobus_transportprotocol_broadcastannouncemessage_numberofpackets = -1; +static int hf_isobus_transportprotocol_broadcastannouncemessage_pgn = -1; + +static int hf_msg_fragments = -1; +static int hf_msg_fragment = -1; +static int hf_msg_fragment_overlap = -1; +static int hf_msg_fragment_overlap_conflicts = -1; +static int hf_msg_fragment_multiple_tails = -1; +static int hf_msg_fragment_too_long_fragment = -1; +static int hf_msg_fragment_error = -1; +static int hf_msg_fragment_count = -1; +static int hf_msg_reassembled_in = -1; +static int hf_msg_reassembled_length = -1; +static int hf_msg_reassembled_data = -1; + +/* Desegmentation of isobus transport protocol streams */ +static reassembly_table isobus_reassembly_table; +static unsigned int reassembly_total_size; +static unsigned int reassembly_current_size; + +static dissector_table_t subdissector_table; + +#define VT_TO_ECU 230 +#define ECU_TO_VT 231 +#define ETP_DATA_TRANSFER 199 +#define ETP_DATA_MANAGEMENT 200 +#define TP_DATA_TRANSFER 235 +#define TP_DATA_MANAGEMENT 236 + +static const value_string pdu_format_dp0[] = { + { 7 , "General-purpose valve load sense pressure" }, + { 147, "NAME management" }, + { 170, "Client to File Server" }, + { 171, "File Server to Client" }, + { 172, "Guidance machine status" }, + { 173, "Guidance system command" }, + { 196, "General-purpose valve command" }, + { 197, "General-purpose valve measured flow" }, + { 198, "General-purpose valve estimated flow" }, + { ETP_DATA_TRANSFER, "EXTENDED TRANSPORT PROTOCOL - DATA TRANSFER" }, + { ETP_DATA_MANAGEMENT, "EXTENDED TRANSPORT PROTOCOL - CONNECTION MANAGEMENT" }, + { 201, "REQUEST2" }, + { 202, "TRANSFER" }, + { VT_TO_ECU, "VT to ECU" }, + { ECU_TO_VT, "ECU to VT" }, + { 232, "ACKNOWLEDGEMENT" }, + { 234, "REQUEST" }, + { TP_DATA_TRANSFER, "TRANSPORT PROTOCOL - DATA TRANSFER" }, + { TP_DATA_MANAGEMENT, "TRANSPORT PROTOCOL - CONNECTION MANAGEMENT" }, + { 238, "ADDRESS CLAIM" }, + { 239, "PROPRIETARY A" }, + { 253, "Certification / Operating state" }, + { 254, "Parameter groups" }, + { 255, "PROPRIETARY B" }, + { 0, NULL } +}; + +static const value_string pdu_format_dp0_short[] = { + { 7 , "GPV.LSP" }, + { 147, "NM" }, + { 170, "C2FS" }, + { 171, "FS2C" }, + { 172, "G.MS" }, + { 173, "G.SC" }, + { 196, "GPV.C" }, + { 197, "GPV.MF" }, + { 198, "GPV.EF" }, + { ETP_DATA_TRANSFER, "ETP.DT" }, + { ETP_DATA_MANAGEMENT, "ETP.CM" }, + { 201, "REQ2" }, + { 202, "TRANS" }, + { VT_TO_ECU, "VT2ECU" }, + { ECU_TO_VT, "ECU2VT" }, + { 232, "ACK" }, + { 234, "REQ" }, + { TP_DATA_TRANSFER, "TP.DT" }, + { TP_DATA_MANAGEMENT, "TP.CM" }, + { 238, "AC" }, + { 239, "PR.A" }, + { 253, "Cert/OS" }, + { 254, "PAR.G" }, + { 255, "PR.B" }, + { 0, NULL } +}; + +static const value_string pdu_format_dp1[] = { + { 239, "PROPRIETARY A2" }, + { 0, NULL } +}; + +static const value_string pdu_format_dp1_short[] = { + { 239, "PR.A2" }, + { 0, NULL } +}; + +static const range_string address_range[] = { + { 0 , 127, "Preferred Address" }, + { 128, 247, "Self-configurable Address" }, + { 248, 253, "Preferred Address" }, + { 254, 254, "NULL Address" }, + { 255, 255, "Global Address" }, + { 0, 0, NULL } +}; + +static const range_string connection_abort_reasons[] = { + { 1, 1, "Already in one or more connection-managed sessions and cannot support another" }, + { 2, 2, "System resources were needed for another task so this connection managed session was terminated" }, + { 3, 3, "A timeout occurred and this is the connection abort to close the session" }, + { 4, 4, "CTS messages received when data transfer is in progress" }, + { 5, 5, "Maximum retransmit request limit reached" }, + { 6, 6, "Unexpected data transfer packet" }, + { 7, 7, "Bad sequence number (and software is not able to recover)" }, + { 8, 8, "Duplicate sequence number (and software is not able to recover)" }, + { 9, 250, "Reserved for assignment in a future International Standard" }, + { 251, 255, "According to ISO 11783-7 definitions" }, + { 0, 0, NULL } +}; + +static const value_string transport_protocol_control_byte[] = { + { 16, "Request To Send" }, + { 17, "Clear To Send" }, + { 19, "End of Message Acknowledgement" }, + { 255, "Connection Abort" }, + { 32, "Broadcast Announce Message" }, + { 0, NULL } +}; + +static gint ett_isobus = -1; +static gint ett_isobus_can_id = -1; +static gint ett_isobus_fragment = -1; +static gint ett_isobus_fragments = -1; + +static const fragment_items isobus_frag_items = { + &ett_isobus_fragment, + &ett_isobus_fragments, + /* Fragment fields */ + &hf_msg_fragments, + &hf_msg_fragment, + &hf_msg_fragment_overlap, + &hf_msg_fragment_overlap_conflicts, + &hf_msg_fragment_multiple_tails, + &hf_msg_fragment_too_long_fragment, + &hf_msg_fragment_error, + &hf_msg_fragment_count, + /* Reassembled in field */ + &hf_msg_reassembled_in, + /* Reassembled length field */ + &hf_msg_reassembled_length, + &hf_msg_reassembled_data, + /* Tag */ + "Message fragments" +}; + +struct address_combination +{ + guint8 src_address; + guint8 dst_address; +}; + +struct reassemble_identifier +{ + guint32 startFrameId; + guint32 endFrameId; + guint32 identifier; +}; + +struct address_reassemble_table +{ + wmem_list_t* reassembleIdentifierTable; + guint32 identifierCounter; +}; + +static wmem_map_t *addressIdentifierTable = NULL; + +static struct reassemble_identifier* findIdentifierFor(wmem_list_t* reassembleIdentifierTable, guint32 frameIndex) +{ + wmem_list_frame_t* currentItem = wmem_list_head(reassembleIdentifierTable); + + while (currentItem != NULL) + { + struct reassemble_identifier* currentData = (struct reassemble_identifier*)wmem_list_frame_data(currentItem); + if (frameIndex <= currentData->endFrameId && frameIndex >= currentData->startFrameId) + { + return currentData; + } + else + { + currentItem = wmem_list_frame_next(currentItem); + } + } + return NULL; +} + +static gboolean +address_combination_equal(gconstpointer p1, gconstpointer p2) +{ + const struct address_combination* addr_combi1 = (const struct address_combination*)p1; + const struct address_combination* addr_combi2 = (const struct address_combination*)p2; + + if (addr_combi1->src_address == addr_combi2->src_address && + addr_combi1->dst_address == addr_combi2->dst_address) + { + return TRUE; + } + else + { + return FALSE; + } +} + +static guint +address_combination_hash(gconstpointer p) +{ + const struct address_combination* addr_combi = (const struct address_combination*)p; + return (addr_combi->src_address * 256) + (addr_combi->dst_address); +} + +static struct address_reassemble_table* findAddressIdentifierFor(guint8 src_address, guint8 dst_address) +{ + struct address_combination* addrCombi = wmem_new(wmem_file_scope(), struct address_combination); + + struct address_reassemble_table* foundItem; + + addrCombi->src_address = src_address; + addrCombi->dst_address = dst_address; + + foundItem = (struct address_reassemble_table*)wmem_map_lookup(addressIdentifierTable, addrCombi); + + if(foundItem != NULL) + { + return foundItem; + } + else + { + /* nothing found so create a new one */ + struct address_reassemble_table* newItem; + newItem = wmem_new(wmem_file_scope(), struct address_reassemble_table); + newItem->identifierCounter = 0; + newItem->reassembleIdentifierTable = wmem_list_new(wmem_file_scope()); + wmem_map_insert(addressIdentifierTable, addrCombi, newItem); + return newItem; + } +} + +/* Code to actually dissect the packets */ +static int +dissect_isobus(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) +{ + /* guint priority; */ + /* guint ext_data_page; */ + guint src_addr; + guint data_page; + guint pdu_format; + guint pdu_specific; + struct can_identifier can_id; + char str_dst[10]; + char str_src[4]; + + static guint seqnr = 0; + + int data_offset = 0; + + proto_item *ti, *can_id_ti; + proto_tree *isobus_tree; + proto_tree *isobus_can_id_tree; + + struct reassemble_identifier* identifier = NULL; + struct address_reassemble_table* address_reassemble_table_item = NULL; + + DISSECTOR_ASSERT(data); + can_id = *((struct can_identifier*)data); + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISObus"); + col_clear(pinfo->cinfo, COL_INFO); + + /*priority = (can_id.id >> 26) & 0x07;*/ + /*ext_data_page = (can_id.id >> 25) & 0x01;*/ + data_page = (can_id.id >> 24) & 0x01; + pdu_format = (can_id.id >> 16) & 0xff; + pdu_specific = (can_id.id >> 8) & 0xff; + src_addr = (can_id.id >> 0 ) & 0xff; + + ti = proto_tree_add_item(tree, proto_isobus, tvb, 0, tvb_reported_length(tvb), ENC_NA); + isobus_tree = proto_item_add_subtree(ti, ett_isobus); + + /* add COB-ID with function code and node id */ + can_id_ti = proto_tree_add_uint(isobus_tree, hf_isobus_can_id, tvb, 0, 0, can_id.id); + isobus_can_id_tree = proto_item_add_subtree(can_id_ti, ett_isobus_can_id); + + /* add priority */ + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_priority, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + + /* add extended data page */ + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_ext_data_page, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + + /* add data page */ + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_data_page, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + + /* add pdu format */ + switch(data_page) + { + case 0: + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_pdu_format_dp0, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + break; + case 1: + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_pdu_format_dp1, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + break; + } + + /* add pdu specific */ + if(pdu_format <= 239) + { + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_dst_addr, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + } + else + { + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_group_extension, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + } + + /* add source address */ + ti = proto_tree_add_uint(isobus_can_id_tree, hf_isobus_src_addr, tvb, 0, 0, can_id.id); + PROTO_ITEM_SET_GENERATED(ti); + + /* put source address in source field */ + g_snprintf(str_src, 4, "%d", src_addr); + alloc_address_wmem(pinfo->pool, &pinfo->src, AT_STRINGZ, (int)strlen(str_src) + 1, str_src); + + if(pdu_format <= 239) /* PDU1 format */ + { + /* put destination address in address field */ + g_snprintf(str_dst, 4, "%d", pdu_specific); + alloc_address_wmem(pinfo->pool, &pinfo->dst, AT_STRINGZ, (int)strlen(str_dst) + 1, str_dst); + } + else + { + /* put group destination address in address field and add (grp) to it */ + g_snprintf(str_dst, 10, "%d (grp)", pdu_specific); + alloc_address_wmem(pinfo->pool, &pinfo->dst, AT_STRINGZ, (int)strlen(str_dst) + 1, str_dst); + } + + switch(data_page) + { + case 0: + col_append_fstr(pinfo->cinfo, COL_INFO, "[%s] ", + val_to_str(pdu_format, pdu_format_dp0_short, "Unknown")); + break; + case 1: + col_append_fstr(pinfo->cinfo, COL_INFO, "[%s] ", + val_to_str(pdu_format, pdu_format_dp1_short, "Unknown")); + break; + } + + if (pdu_format == TP_DATA_MANAGEMENT || pdu_format == TP_DATA_TRANSFER || + pdu_format == ETP_DATA_MANAGEMENT || pdu_format == ETP_DATA_TRANSFER) + { + gboolean isReply = FALSE; + if(pdu_format == TP_DATA_MANAGEMENT) + { + guint8 control_byte = tvb_get_guint8(tvb, data_offset); + switch(control_byte) + { + case 17: + case 19: + isReply = TRUE; + break; + case 16: + default: + isReply = FALSE; + break; + } + } + if(isReply) + { + address_reassemble_table_item = + findAddressIdentifierFor(pdu_specific, src_addr); + } + else + { + address_reassemble_table_item = + findAddressIdentifierFor(src_addr, pdu_specific); + } + identifier = findIdentifierFor( + address_reassemble_table_item->reassembleIdentifierTable, + pinfo->num); + } + + if(pdu_format == TP_DATA_MANAGEMENT) + { + guint32 control_byte; + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_controlbyte, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &control_byte); + data_offset += 1; + + if (control_byte == 16) + { + guint32 total_size, number_of_packets; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_requesttosend_totalsize, tvb, data_offset, 2, ENC_LITTLE_ENDIAN, &total_size); + data_offset += 2; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_requesttosend_numberofpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets); + data_offset += 1; + + proto_tree_add_item(tree, hf_isobus_transportprotocol_requesttosend_maximumpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN); + data_offset += 1; + + proto_tree_add_item(tree, hf_isobus_transportprotocol_requesttosend_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN); + + if (identifier) + { + seqnr = identifier->identifier; + } + else + { + struct reassemble_identifier* reassembleIdentifierTableEntry = + wmem_new(wmem_file_scope(), struct reassemble_identifier); + seqnr = ++address_reassemble_table_item->identifierCounter; + reassembleIdentifierTableEntry->identifier = seqnr; + reassembleIdentifierTableEntry->startFrameId = pinfo->num; + reassembleIdentifierTableEntry->endFrameId = pinfo->num; + + wmem_list_append(address_reassemble_table_item->reassembleIdentifierTable, reassembleIdentifierTableEntry); + } + + fragment_add_seq(&isobus_reassembly_table, tvb, 5, pinfo, + seqnr, NULL, 0, 3, TRUE, 0); + fragment_set_tot_len(&isobus_reassembly_table, pinfo, + seqnr, NULL, number_of_packets); + reassembly_current_size = 3; + reassembly_total_size = total_size + 3; + + + col_append_fstr(pinfo->cinfo, COL_INFO, "Request to send message of %u bytes in %u fragments", total_size, number_of_packets); + } + else if (control_byte == 17) + { + guint32 number_of_packets_can_be_sent, next_packet_number; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_cleartosend_numberofpacketscanbesent, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets_can_be_sent); + data_offset += 1; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_cleartosend_nextpacketnumber, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &next_packet_number); + data_offset += 1; + + data_offset += 2; + + proto_tree_add_item(tree, hf_isobus_transportprotocol_cleartosend_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN); + + col_append_fstr(pinfo->cinfo, COL_INFO, "Clear to send, can receive %u packets, next packet is %u", number_of_packets_can_be_sent, next_packet_number); + } + else if (control_byte == 19) + { + guint32 total_size, number_of_packets; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_endofmsgack_totalsize, tvb, data_offset, 2, ENC_LITTLE_ENDIAN, &total_size); + data_offset += 2; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_endofmsgack_numberofpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets); + data_offset += 1; + + data_offset += 1; + + proto_tree_add_item(tree, hf_isobus_transportprotocol_endofmsgack_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN); + + col_append_fstr(pinfo->cinfo, COL_INFO, "End of Message Acknowledgement, %u bytes sent in %u packets", total_size, number_of_packets); + } + else if (control_byte == 255) + { + guint32 connection_abort_reason; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_connabort_abortreason, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &connection_abort_reason); + data_offset += 1; + + data_offset += 3; + + proto_tree_add_item(tree, hf_isobus_transportprotocol_connabort_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN); + + col_append_fstr(pinfo->cinfo, COL_INFO, "Connection Abort, %s", rval_to_str(connection_abort_reason, connection_abort_reasons, "unknown reason")); + } + else if (control_byte == 32) + { + guint32 total_size, number_of_packets; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_broadcastannouncemessage_totalsize, tvb, data_offset, 2, ENC_LITTLE_ENDIAN, &total_size); + data_offset += 2; + + proto_tree_add_item_ret_uint(tree, hf_isobus_transportprotocol_broadcastannouncemessage_numberofpackets, tvb, data_offset, 1, ENC_LITTLE_ENDIAN, &number_of_packets); + data_offset += 1; + + data_offset += 1; + + proto_tree_add_item(tree, hf_isobus_transportprotocol_broadcastannouncemessage_pgn, tvb, data_offset, 3, ENC_LITTLE_ENDIAN); + + col_append_fstr(pinfo->cinfo, COL_INFO, "Broadcast Announcement Message, %u bytes sent in %u packets", total_size, number_of_packets); + } + } + + //if reassemble has not started yet don't parse the message + else if (pdu_format == TP_DATA_TRANSFER && address_reassemble_table_item->reassembleIdentifierTable != NULL) + { + tvbuff_t *reassembled_data; + guint16 fragment_size = 0; + gboolean lastPacket; + guint8 sequenceId = tvb_get_guint8(tvb, 0); + fragment_head *fg_head; + if (identifier == NULL) + { + wmem_list_frame_t* lastItem = wmem_list_tail(address_reassemble_table_item->reassembleIdentifierTable); + if(lastItem != NULL) + { + struct reassemble_identifier* lastIdentifier = (struct reassemble_identifier*)wmem_list_frame_data(lastItem); + lastIdentifier->endFrameId = pinfo->num; + identifier = lastIdentifier; + } + } + + if(identifier != NULL) + { + if(reassembly_total_size > reassembly_current_size + 7) + { + fragment_size = 7; + lastPacket = FALSE; + } + else + { + fragment_size = reassembly_total_size - reassembly_current_size; + lastPacket = TRUE; + } + + fg_head = fragment_add_seq(&isobus_reassembly_table, tvb, 1, pinfo, + identifier->identifier, NULL, sequenceId, fragment_size, !lastPacket, 0); + reassembly_current_size += fragment_size; + + reassembled_data = process_reassembled_data(tvb, 0, pinfo, "Reassembled data", + fg_head, &isobus_frag_items, NULL, tree); + if (reassembled_data) + { + guint8 pdu_format_reassembled = tvb_get_guint8(reassembled_data, 1); + + if (dissector_try_uint_new(subdissector_table, pdu_format_reassembled, + tvb_new_subset_remaining(reassembled_data, 3), pinfo, + isobus_tree, FALSE, NULL) == 0) + { + col_append_fstr(pinfo->cinfo, COL_INFO, "Protocol not yet supported"); + } + } + else + { + col_append_fstr(pinfo->cinfo, COL_INFO, "Fragment number %u", sequenceId); + } + } + else + { + col_append_fstr(pinfo->cinfo, COL_INFO, "ERROR: Transport protocol was not initialized"); + } + } + else if(dissector_try_uint_new(subdissector_table, pdu_format, tvb, pinfo, isobus_tree, FALSE, data) == 0) + { + col_append_fstr(pinfo->cinfo, COL_INFO, "Protocol not yet supported"); + } + + return tvb_reported_length(tvb); +} + +static void +isobus_init(void) +{ + reassembly_table_init(&isobus_reassembly_table, &addresses_reassembly_table_functions); +} + +static void +isobus_cleanup(void) +{ + reassembly_table_destroy(&isobus_reassembly_table); +} + +/* Register the protocol with Wireshark */ +void +proto_register_isobus(void) +{ + static hf_register_info hf[] = { + { &hf_isobus_can_id, + { "CAN-ID", "isobus.can_id", + FT_UINT32, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_priority, + { "Priority", "isobus.priority", + FT_UINT32, BASE_HEX, NULL, 0x1C000000, + NULL, HFILL } + }, + { &hf_isobus_ext_data_page, + { "Ext data page", "isobus.edp", + FT_UINT32, BASE_HEX, NULL, 0x2000000, + NULL, HFILL } + }, + { &hf_isobus_data_page, + { "Data page", "isobus.datapage", + FT_UINT32, BASE_HEX, NULL, 0x1000000, + NULL, HFILL } + }, + { &hf_isobus_pdu_format_dp0, + { "PDU Format", "isobus.pdu_format", + FT_UINT32, BASE_DEC, VALS(pdu_format_dp0), 0xff0000, + NULL, HFILL } + }, + { &hf_isobus_pdu_format_dp1, + { "PDU Format", "isobus.pdu_format", + FT_UINT32, BASE_DEC, VALS(pdu_format_dp1), 0xff0000, + NULL, HFILL } + }, + { &hf_isobus_group_extension, + { "Group Extension", "isobus.grp_ext", + FT_UINT32, BASE_DEC, NULL, 0xff00, + NULL, HFILL } + }, + { &hf_isobus_dst_addr, + { "Destination Address", "isobus.dst_addr", + FT_UINT32, BASE_DEC | BASE_RANGE_STRING, RVALS(address_range), 0xff00, + NULL, HFILL } + }, + { &hf_isobus_src_addr, + { "Source Address", "isobus.src_addr", + FT_UINT32, BASE_DEC | BASE_RANGE_STRING, RVALS(address_range), 0xff, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_controlbyte, + { "Control Byte", "isobus.transport_protocol.control_byte", + FT_UINT8, BASE_DEC, VALS(transport_protocol_control_byte), 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_requesttosend_totalsize, + { "Total message size", "isobus.transport_protocol.request_to_send.total_size", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_requesttosend_numberofpackets, + { "Number of Packets", "isobus.transport_protocol.request_to_send.number_of_packets", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_requesttosend_maximumpackets, + { "Maximum Packets", "isobus.transport_protocol.request_to_send.maximum_packets", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_requesttosend_pgn, + { "PGN", "isobus.transport_protocol.request_to_send.pgn", + FT_UINT24, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_cleartosend_numberofpacketscanbesent, + { "Number of packets that can be sent", "isobus.transport_protocol.request_to_send.number_of_packets_that_can_be_sent", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_cleartosend_nextpacketnumber, + { "Next packet number", "isobus.transport_protocol.request_to_send.next_packet_number", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_cleartosend_pgn, + { "PGN", "isobus.transport_protocol.clear_to_send.pgn", + FT_UINT24, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_endofmsgack_totalsize, + { "Total Size", "isobus.transport_protocol.end_of_message_acknowledgement.total_size", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_endofmsgack_numberofpackets, + { "Number of Packets", "isobus.transport_protocol.end_of_message_acknowledgement.number_of_packets", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_endofmsgack_pgn, + { "PGN", "isobus.transport_protocol.end_of_message_acknowledgement.pgn", + FT_UINT24, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_connabort_abortreason, + { "Connection Abort reason", "isobus.transport_protocol.connection_abort.abort_reason", + FT_UINT8, BASE_DEC, VALS(connection_abort_reasons), 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_connabort_pgn, + { "PGN", "isobus.transport_protocol.connection_abort.pgn", + FT_UINT24, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_broadcastannouncemessage_totalsize, + { "Total Message Size", "isobus.transport_protocol.broadcast_announce_message.total_message_size", + FT_UINT16, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_broadcastannouncemessage_numberofpackets, + { "Total Number of Packets", "isobus.transport_protocol.broadcast_announce_message.total_number_of_packets", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL } + }, + { &hf_isobus_transportprotocol_broadcastannouncemessage_pgn, + { "PGN", "isobus.transport_protocol.broadcast_announce_message.pgn", + FT_UINT24, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_msg_fragments, + { "Message fragments", "isobus.fragments", + FT_NONE, BASE_NONE, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_fragment, + { "Message fragment", "isobus.fragment", + FT_FRAMENUM, BASE_NONE, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_fragment_overlap, + { "Message fragment overlap", "isobus.fragment.overlap", + FT_BOOLEAN, 0, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_fragment_overlap_conflicts, + { "Message fragment overlapping with conflicting data", "isobus.fragment.overlap.conflicts", + FT_BOOLEAN, 0, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_fragment_multiple_tails, + { "Message has multiple tail fragments", "isobus.fragment.multiple_tails", + FT_BOOLEAN, 0, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_fragment_too_long_fragment, + { "Message fragment too long", "isobus.fragment.too_long_fragment", + FT_BOOLEAN, 0, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_fragment_error, + { "Message defragmentation error", "isobus.fragment.error", + FT_FRAMENUM, BASE_NONE, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_fragment_count, + { "Message fragment count", "isobus.fragment.count", + FT_UINT32, BASE_DEC, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_reassembled_in, + { "Reassembled in", "isobus.reassembled.in", + FT_FRAMENUM, BASE_NONE, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_reassembled_length, + { "Reassembled length", "isobus.reassembled.length", + FT_UINT32, BASE_DEC, NULL, 0x00, + NULL, HFILL } + }, + { &hf_msg_reassembled_data, + { "Reassembled data", "isobus.reassembled.data", + FT_BYTES, BASE_NONE, NULL, 0x00, + NULL, HFILL } + } + }; + + static gint *ett[] = { + &ett_isobus, + &ett_isobus_can_id, + &ett_isobus_fragment, + &ett_isobus_fragments + }; + + /* Register protocol init routine */ + register_init_routine(&isobus_init); + register_cleanup_routine(&isobus_cleanup); + + proto_isobus = proto_register_protocol("ISObus", + "ISOBUS", + "isobus"); + + proto_register_field_array(proto_isobus, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + addressIdentifierTable = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), address_combination_hash, address_combination_equal); + + subdissector_table = register_dissector_table("isobus.pdu_format", + "PDU format", proto_isobus, FT_UINT8, BASE_DEC); +} + +void +proto_reg_handoff_isobus(void) +{ + dissector_handle_t isobus_handle; + + isobus_handle = create_dissector_handle( dissect_isobus, proto_isobus ); + dissector_add_for_decode_as("can.subdissector", isobus_handle ); +} + +/* + * Editor modelines - http://www.wireshark.org/tools/modelines.html + * + * Local variables:+ + * c-basic-offset: 4 + * tab-width: 8 + * indent-tabs-mode: nil + * End: + * + * vi: set shiftwidth=4 tabstop=8 expandtab: + * :indentSize=4:tabSize=8:noTabs=true: + */ |