--- epan/CMakeLists.txt | 1 epan/dissectors/Makefile.common | 1 epan/dissectors/packet-canopen.c | 503 +++++++++++++++++++++++++++++++++++++ epan/dissectors/packet-socketcan.c | 8 4 files changed, 510 insertions(+), 3 deletions(-) Index: b/epan/CMakeLists.txt =================================================================== --- a/epan/CMakeLists.txt +++ b/epan/CMakeLists.txt @@ -383,6 +383,7 @@ dissectors/packet-bt-utp.c dissectors/packet-bvlc.c dissectors/packet-calcappprotocol.c + dissectors/packet-canopen.c dissectors/packet-capwap.c dissectors/packet-cast.c dissectors/packet-catapult-dct2000.c Index: b/epan/dissectors/Makefile.common =================================================================== --- a/epan/dissectors/Makefile.common +++ b/epan/dissectors/Makefile.common @@ -296,6 +296,7 @@ packet-bt-utp.c \ packet-bvlc.c \ packet-calcappprotocol.c \ + packet-canopen.c \ packet-capwap.c \ packet-cast.c \ packet-catapult-dct2000.c \ Index: b/epan/dissectors/packet-canopen.c =================================================================== --- /dev/null +++ b/epan/dissectors/packet-canopen.c @@ -0,0 +1,503 @@ +/* packet-canopen.c + * Routines for CANopen dissection + * Copyright 2011, Yegor Yefremov + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * Copied from WHATEVER_FILE_YOU_USED (where "WHATEVER_FILE_YOU_USED" + * is a dissector file; if you just copied this from README.developer, + * don't bother with the "Copied from" - you don't even need to put + * in a "Copied from" if you copied an existing dissector, especially + * if the bulk of the code in the new dissector is your code) + * + * 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. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#if 0 +/* Include only as needed */ +#include +#include +#include +#endif + +#include + +#include +#include + +/* IF PROTO exposes code to other dissectors, then it must be exported + in a header file. If not, a header file is not needed at all. */ +//#include "packet-canopen.h" + +/* Forward declaration we need below (if using proto_reg_handoff... + as a prefs callback) */ +//void proto_reg_handoff_canopen(void); + +/* Initialize the protocol and registered fields */ +static int proto_canopen = -1; +static int hf_canopen_cob_id = -1; +static int hf_canopen_type = -1; +static int hf_canopen_function_code = -1; +static int hf_canopen_node_id = -1; +static int hf_canopen_pdo_data = -1; +static int hf_canopen_pdo_data_string = -1; +static int hf_canopen_sdo_cmd = -1; +static int hf_canopen_sdo_main_idx = -1; +static int hf_canopen_sdo_sub_idx = -1; +static int hf_canopen_sdo_data = -1; +static int hf_canopen_em_err_code = -1; +static int hf_canopen_em_err_reg = -1; +static int hf_canopen_em_err_field = -1; +static int hf_canopen_nmt_ctrl_cs = -1; +static int hf_canopen_nmt_ctrl_node_id = -1; +static int hf_canopen_nmt_guard_state = -1; + +/* Global sample preference ("controls" display of numbers) */ +static gboolean gPREF_HEX = FALSE; +/* Global sample port pref */ +static guint gPORT_PREF = 1234; + +/* Initialize the subtree pointers */ +static gint ett_canopen = -1; + +/* broadcast messages */ +#define FC_NMT 0x0 +#define FC_SYNC 0x1 +#define FC_TIME_STAMP 0x2 + +/* point-to-point messages */ +#define FC_EMERGENCY 0x1 +#define FC_PDO1_TX 0x3 +#define FC_PDO1_RX 0x4 +#define FC_PDO2_TX 0x5 +#define FC_PDO2_RX 0x6 +#define FC_PDO3_TX 0x7 +#define FC_PDO3_RX 0x8 +#define FC_PDO4_TX 0x9 +#define FC_PDO4_RX 0xA +#define FC_DEFAULT_SDO_TX 0xB +#define FC_DEFAULT_SDO_RX 0xC +#define FC_NMT_ERR_CONTROL 0xE + +/* message types */ +#define MT_UNKNOWN 0 +#define MT_NMT_CTRL 1 +#define MT_SYNC 2 +#define MT_TIME_STAMP 3 +#define MT_EMERGENCY 4 +#define MT_PDO 5 +#define MT_SDO 6 +#define MT_NMT_GUARD 7 + +/* PDO offsets */ +#define CO_PDO_DATA_OFFSET 8 + +/* SDO offsets */ +#define CO_SDO_CMD_OFFSET 8 +#define CO_SDO_MAIN_IDX_OFFSET 9 +#define CO_SDO_MAIN_SUB_OFFSET 11 +#define CO_SDO_DATA_OFFSET 12 + +/* EMERGENCY offsets */ +#define CO_EM_ERR_CODE_OFFSET 8 +#define CO_EM_ERR_REG_OFFSET 10 +#define CO_EM_ERR_FIELD_OFFSET 11 + +/* NMT offsets */ +#define CO_NMT_CTRL_CS_OFFSET 8 +#define CO_NMT_CTRL_NODE_ID_OFFSET 9 +#define CO_NMT_GUARD_STATE_OFFSET 8 + +/* NMT command specifiers */ +static const value_string nmt_ctrl_cs[] = { + { 0x1, "Start remote node"}, + { 0x2, "Stop remote node"}, + { 0x80, "Enter pre-operational state"}, + { 0x81, "Reset node"}, + { 0x82, "Reset communication"}, + { 0, NULL} +}; + +/* NMT states */ +static const value_string nmt_guard_state[] = { + { 0x0, "Initialising"}, + { 0x1, "Disconnected"}, + { 0x2, "Connecting"}, + { 0x3, "Preparing"}, + { 0x4, "Stopped"}, + { 0x5, "Operational"}, + { 0x7F, "Pre-operational"}, + { 0, NULL} +}; + +static void +canopen_detect_msg_type(guint function_code, guint node_id, char *msg_type, guint *msg_type_id) +{ + switch(function_code) + { + case FC_NMT: + sprintf(msg_type, "NMT"); + *msg_type_id = MT_NMT_CTRL; + break; + case FC_SYNC: + if (node_id <= 0x80) + { + sprintf(msg_type, "Sync"); + *msg_type_id = MT_SYNC; + } + else + { + sprintf(msg_type, "EMERGENCY"); + *msg_type_id = MT_EMERGENCY; + } + break; + case FC_TIME_STAMP: + sprintf(msg_type, "TIME STAMP"); + *msg_type_id = MT_TIME_STAMP; + break; + case FC_PDO1_TX: + sprintf(msg_type, "PDO1 (tx)"); + *msg_type_id = MT_PDO; + break; + case FC_PDO1_RX: + sprintf(msg_type, "PDO1 (rx)"); + *msg_type_id = MT_PDO; + break; + case FC_PDO2_TX: + sprintf(msg_type, "PDO2 (tx)"); + *msg_type_id = MT_PDO; + break; + case FC_PDO2_RX: + sprintf(msg_type, "PDO2 (rx)"); + *msg_type_id = MT_PDO; + break; + case FC_PDO3_TX: + sprintf(msg_type, "PDO3 (tx)"); + *msg_type_id = MT_PDO; + break; + case FC_PDO3_RX: + sprintf(msg_type, "PDO3 (rx)"); + *msg_type_id = MT_PDO; + break; + case FC_PDO4_TX: + sprintf(msg_type, "PDO4 (tx)"); + *msg_type_id = MT_PDO; + break; + case FC_PDO4_RX: + sprintf(msg_type, "PDO4 (rx)"); + *msg_type_id = MT_PDO; + break; + case FC_DEFAULT_SDO_TX: + sprintf(msg_type, "Default-SDO (tx)"); + *msg_type_id = MT_SDO; + break; + case FC_DEFAULT_SDO_RX: + sprintf(msg_type, "Default-SDO (rx)"); + *msg_type_id = MT_SDO; + break; + case FC_NMT_ERR_CONTROL: + sprintf(msg_type, "NMT Error Control"); + *msg_type_id = MT_NMT_GUARD; + break; + default: + sprintf(msg_type, "unknown"); + *msg_type_id = MT_UNKNOWN; + break; + } +} + +/* Code to actually dissect the packets */ +static void +dissect_canopen(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_item *ti, *temp_ti, *cob_ti, *type_ti; + proto_tree *canopen_tree = NULL; + proto_tree *canopen_cob_tree = NULL; + proto_tree *canopen_type_tree = NULL; + guint function_code = -1; + guint node_id = -1; + guint32 id = -1; + guint msg_type_id = -1; + guint8 *bytes_data, can_data_len; + char co_buf[128], type_buf[128]; + + can_data_len = tvb_get_guint8(tvb, 4); + id = tvb_get_ntohl(tvb, 0); + + node_id = (guint)(id & 0x7F); + function_code = (guint)((id >> 7) & 0xF); + + if (tvb_length(tvb) < 1) + return 0; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "CANopen"); + col_clear(pinfo->cinfo, COL_INFO); + canopen_detect_msg_type(function_code, node_id, type_buf, &msg_type_id); + col_add_fstr(pinfo->cinfo, COL_INFO, "%s", type_buf); + + if (tree) { + + ti = proto_tree_add_item(tree, proto_canopen, tvb, 0, 1, FALSE); + + canopen_tree = proto_item_add_subtree(ti, ett_canopen); + + /* add COB-ID with function code and node id */ + cob_ti = proto_tree_add_string(canopen_tree, hf_canopen_cob_id, tvb, 0, 4, ""); + canopen_cob_tree = proto_item_add_subtree(cob_ti, ett_canopen); + + /* add function code */ + proto_tree_add_item(canopen_cob_tree, + hf_canopen_function_code, tvb, 0, 4, FALSE); + + /* add node id */ + proto_tree_add_item(canopen_cob_tree, + hf_canopen_node_id, tvb, 0, 4, FALSE); + + /* add CANopen frame type */ + type_ti = proto_tree_add_string(canopen_tree, hf_canopen_type, tvb, 0, 4, type_buf); + canopen_type_tree = proto_item_add_subtree(type_ti, ett_canopen); + + switch(msg_type_id) + { + case MT_NMT_CTRL: + proto_tree_add_item(canopen_type_tree, + hf_canopen_nmt_ctrl_cs, tvb, CO_NMT_CTRL_CS_OFFSET, 1, FALSE); + + proto_tree_add_item(canopen_type_tree, + hf_canopen_nmt_ctrl_node_id, tvb, CO_NMT_CTRL_NODE_ID_OFFSET, 1, FALSE); + break; + case MT_NMT_GUARD: + proto_tree_add_item(canopen_type_tree, + hf_canopen_nmt_guard_state, tvb, CO_NMT_GUARD_STATE_OFFSET, 1, FALSE); + break; + case MT_SYNC: + break; + case MT_TIME_STAMP: + break; + case MT_EMERGENCY: + proto_tree_add_item(canopen_type_tree, + hf_canopen_em_err_code, tvb, CO_EM_ERR_CODE_OFFSET, 2, FALSE); + + proto_tree_add_item(canopen_type_tree, + hf_canopen_em_err_reg, tvb, CO_EM_ERR_REG_OFFSET, 1, FALSE); + + bytes_data = tvb_memdup(tvb, CO_EM_ERR_FIELD_OFFSET, 5); + proto_tree_add_bytes(canopen_type_tree, + hf_canopen_em_err_field, tvb, CO_EM_ERR_FIELD_OFFSET, 4, bytes_data); + break; + case MT_PDO: + if(can_data_len) + { + bytes_data = tvb_memdup(tvb, CO_PDO_DATA_OFFSET, can_data_len); + proto_tree_add_bytes(canopen_type_tree, + hf_canopen_pdo_data, tvb, CO_PDO_DATA_OFFSET, can_data_len, bytes_data); + } + else + { + proto_tree_add_string(canopen_type_tree, hf_canopen_pdo_data_string, tvb, CO_PDO_DATA_OFFSET, 0, "empty"); + } + break; + case MT_SDO: + proto_tree_add_item(canopen_type_tree, + hf_canopen_sdo_cmd, tvb, CO_SDO_CMD_OFFSET, 1, FALSE); + + proto_tree_add_item(canopen_type_tree, + hf_canopen_sdo_main_idx, tvb, CO_SDO_MAIN_IDX_OFFSET, 2, FALSE); + + proto_tree_add_item(canopen_type_tree, + hf_canopen_sdo_sub_idx, tvb, CO_SDO_MAIN_SUB_OFFSET, 1, FALSE); + + /* TODO calculate actuall data bytes */ + bytes_data = tvb_memdup(tvb, CO_SDO_DATA_OFFSET, 4); + proto_tree_add_bytes(canopen_type_tree, + hf_canopen_sdo_data, tvb, CO_SDO_DATA_OFFSET, 4, bytes_data); + break; + } + + } +} + + +/* Register the protocol with Wireshark */ + +/* this format is require because a script is used to build the C function + that calls all the protocol registration. +*/ + +void +proto_register_canopen(void) +{ + module_t *canopen_module; + + static hf_register_info hf[] = { + { &hf_canopen_cob_id, + { "COB-ID", "canopen.cob_id", + FT_STRINGZ, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_type, + { "Type", "canopen.type", + FT_STRINGZ, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_function_code, + { "Function code", "canopen.function_code", + FT_UINT32, BASE_HEX, NULL, 0x780, + NULL, HFILL } + }, + { &hf_canopen_node_id, + { "Node-ID", "canopen.node_id", + FT_UINT32, BASE_HEX, NULL, 0x7F, + NULL, HFILL } + }, + { &hf_canopen_pdo_data, + { "Data", "canopen.pdo.data", + FT_BYTES, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_pdo_data_string, + { "Data", "canopen.pdo.data", + FT_STRINGZ, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_sdo_cmd, + { "SDO command byte", "canopen.sdo.cmd", + FT_UINT8, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_sdo_main_idx, + { "OD main-index", "canopen.sdo.main_idx", + FT_UINT16, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_sdo_sub_idx, + { "OD sub-index", "canopen.sdo.sub_idx", + FT_UINT8, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_sdo_data, + { "Data", "canopen.sdo.data", + FT_BYTES, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_em_err_code, + { "Error code", "canopen.em.err_code", + FT_UINT16, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_em_err_reg, + { "Error register", "canopen.em.err_reg", + FT_UINT8, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_em_err_field, + { "Manufacture specific error field", "canopen.em.err_field", + FT_BYTES, BASE_NONE, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_nmt_ctrl_cs, + { "Command specifier", "canopen.nmt_ctrl.cd", + FT_UINT8, BASE_HEX, nmt_ctrl_cs, 0xFF, + NULL, HFILL } + }, + { &hf_canopen_nmt_ctrl_node_id, + { "Node-ID", "canopen.nmt_ctrl.node_id", + FT_UINT8, BASE_HEX, NULL, 0x0, + NULL, HFILL } + }, + { &hf_canopen_nmt_guard_state, + { "Node-ID", "canopen.nmt_guard.state", + FT_UINT8, BASE_HEX, nmt_guard_state, 0x7F, + NULL, HFILL } + }, + }; + + static gint *ett[] = { + &ett_canopen + }; + + /* Register the protocol name and description */ + proto_canopen = proto_register_protocol("CANopen", + "CANOPEN", + "canopen"); + + register_dissector("canopen", dissect_canopen, proto_canopen); + + /* Required function calls to register the header fields and subtrees used */ + proto_register_field_array(proto_canopen, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); +#if 0 +/* Register preferences module (See Section 2.6 for more on preferences) */ +/* (Registration of a prefs callback is not required if there are no */ +/* prefs-dependent registration functions (eg: a port pref). */ +/* See proto_reg_handoff below. */ +/* If a prefs callback is not needed, use NULL instead of */ +/* proto_reg_handoff_canopen in the following). */ + canopen_module = prefs_register_protocol(proto_canopen, + proto_reg_handoff_canopen); + +/* Register preferences module under preferences subtree. + Use this function instead of prefs_register_protocol if you want to group + preferences of several protocols under one preferences subtree. + Argument subtree identifies grouping tree node name, several subnodes can be + specified usign slash '/' (e.g. "OSI/X.500" - protocol preferences will be + accessible under Protocols->OSI->X.500-> preferences node. +*/ + + canopen_module = prefs_register_protocol_subtree(const char *subtree, + proto_canopen, proto_reg_handoff_canopen); + +/* Register a sample preference */ + prefs_register_bool_preference(canopen_module, "show_hex", + "Display numbers in Hex", + "Enable to display numerical values in hexadecimal.", + &gPREF_HEX); + +/* Register a sample port preference */ + prefs_register_uint_preference(canopen_module, "tcp.port", "canopen TCP Port", + " canopen TCP port if other than the default", + 10, &gPORT_PREF); +#endif +} + + + +#if 1 +/* Simple form of proto_reg_handoff_canopen which can be used if there are + no prefs-dependent registration function calls. + */ + +void +proto_reg_handoff_canopen(void) +{ + dissector_handle_t canopen_handle; + +/* Use new_create_dissector_handle() to indicate that dissect_canopen() + * returns the number of bytes it dissected (or 0 if it thinks the packet + * does not belong to CANopen). + */ + canopen_handle = new_create_dissector_handle(dissect_canopen, + proto_canopen); +} +#endif + Index: b/epan/dissectors/packet-socketcan.c =================================================================== --- a/epan/dissectors/packet-socketcan.c +++ b/epan/dissectors/packet-socketcan.c @@ -54,6 +54,7 @@ static int proto_can = -1; static dissector_handle_t data_handle; +static dissector_handle_t canopen_handle; #define LINUX_CAN_STD 0 #define LINUX_CAN_EXT 1 @@ -112,8 +113,8 @@ proto_tree_add_item(can_tree, hf_can_errflag, tvb, 0, 4, FALSE ); proto_tree_add_item(can_tree, hf_can_len, tvb, CAN_LEN_OFFSET, 1, FALSE ); - next_tvb = tvb_new_subset(tvb, CAN_DATA_OFFSET, tvb_get_guint8(tvb, CAN_LEN_OFFSET), 8 ); - call_dissector(data_handle, next_tvb, pinfo, tree ); + //next_tvb = tvb_new_subset(tvb, CAN_DATA_OFFSET, tvb_get_guint8(tvb, CAN_LEN_OFFSET), 8 ); + call_dissector(canopen_handle, /*next_*/tvb, pinfo, tree ); } } @@ -192,7 +193,8 @@ { dissector_handle_t can_handle; - data_handle = find_dissector("data"); + //data_handle = find_dissector("data"); + canopen_handle = find_dissector("canopen"); can_handle = create_dissector_handle(dissect_socketcan, proto_can); dissector_add_uint("wtap_encap", WTAP_ENCAP_SOCKETCAN, can_handle);