2 * Routines for dissection of SAE J1939
7 * Wireshark - Network traffic analyzer
8 * By Gerald Combs <gerald@wireshark.org>
9 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 #include <epan/packet.h>
30 void proto_register_j1939(void);
32 #define J1939_CANID_MASK 0x1FFFFFFF
33 #define J1939_11BIT_ID 0x000003FF
35 static int proto_j1939 = -1;
37 static int hf_j1939_can_id = -1;
38 static int hf_j1939_priority = -1;
39 static int hf_j1939_pgn = -1;
40 static int hf_j1939_data_page = -1;
41 static int hf_j1939_extended_data_page = -1;
42 static int hf_j1939_pdu_format = -1;
43 static int hf_j1939_pdu_specific = -1;
44 static int hf_j1939_src_addr = -1;
45 static int hf_j1939_dst_addr = -1;
46 static int hf_j1939_group_extension = -1;
47 static int hf_j1939_data = -1;
49 static gint ett_j1939 = -1;
50 static gint ett_j1939_can = -1;
51 static gint ett_j1939_message = -1;
53 static dissector_table_t subdissector_pgn_table;
55 static const value_string j1939_address_vals[] = {
59 {3,"Transmission #1"},
60 {4,"Transmission #2"},
61 {5,"Shift Console - Primary"},
62 {6,"Shift Console - Secondary"},
63 {7,"Power TakeOff - (Main or Rear)"},
64 {8,"Axle - Steering"},
65 {9,"Axle - Drive #1"},
66 {10,"Axle - Drive #2"},
67 {11,"Brakes - System Controller"},
68 {12,"Brakes - Steer Axle"},
69 {13,"Brakes - Drive axle #1"},
70 {14,"Brakes - Drive Axle #2"},
71 {15,"Retarder - Engine"},
72 {16,"Retarder - Driveline"},
73 {17,"Cruise Control"},
75 {19,"Steering Controller"},
76 {20,"Suspension - Steer Axle"},
77 {21,"Suspension - Drive Axle #1"},
78 {22,"Suspension - Drive Axle #2"},
79 {23,"Instrument Cluster #1"},
81 {25,"Passenger-Operator Climate Control #1"},
82 {26,"Alternator/Electrical Charging System"},
83 {27,"Aerodynamic Control"},
84 {28,"Vehicle Navigation"},
85 {29,"Vehicle Security"},
86 {30,"Electrical System"},
87 {31,"Starter System"},
88 {32,"Tractor-Trailer Bridge #1"},
89 {33,"Body Controller"},
90 {34,"Auxiliary Valve Control or Engine Air System Valve Control"},
92 {36,"Power TakeOff (Front or Secondary)"},
93 {37,"Off Vehicle Gateway"},
94 {38,"Virtual Terminal (in cab)"},
95 {39,"Management Computer #1"},
96 {40,"Cab Display #1"},
97 {41,"Retarder, Exhaust, Engine #1"},
98 {42,"Headway Controller"},
99 {43,"On-Board Diagnostic Unit"},
100 {44,"Retarder, Exhaust, Engine #2"},
101 {45,"Endurance Braking System"},
102 {46,"Hydraulic Pump Controller"},
103 {47,"Suspension - System Controller #1"},
104 {48,"Pneumatic - System Controller"},
105 {49,"Cab Controller - Primary"},
106 {50,"Cab Controller - Secondary"},
107 {51,"Tire Pressure Controller"},
108 {52,"Ignition Control Module #1"},
109 {53,"Ignition Control Module #2"},
110 {54,"Seat Control #1"},
111 {55,"Lighting - Operator Controls"},
112 {56,"Rear Axle Steering Controller #1"},
113 {57,"Water Pump Controller"},
114 {58,"Passenger-Operator Climate Control #2"},
115 {59,"Transmission Display - Primary"},
116 {60,"Transmission Display - Secondary"},
117 {61,"Exhaust Emission Controller"},
118 {62,"Vehicle Dynamic Stability Controller"},
120 {64,"Suspension - System Controller #2"},
121 {65,"Information System Controller #1"},
123 {67,"Clutch/Converter Unit"},
124 {68,"Auxiliary Heater #1"},
125 {69,"Auxiliary Heater #2"},
126 {70,"Engine Valve Controller"},
127 {71,"Chassis Controller #1"},
128 {72,"Chassis Controller #2"},
129 {73,"Propulsion Battery Charger"},
130 {74,"Communications Unit, Cellular"},
131 {75,"Communications Unit, Satellite"},
132 {76,"Communications Unit, Radio"},
133 {77,"Steering Column Unit"},
134 {78,"Fan Drive Controller"},
135 {79,"Seat Control #2"},
136 {80,"Parking brake controller"},
137 {81,"Aftertreatment #1 system gas intake"},
138 {82,"Aftertreatment #1 system gas outlet"},
139 {83,"Safety Restraint System"},
140 {84,"Cab Display #2"},
141 {85,"Diesel Particulate Filter Controller"},
142 {86,"Aftertreatment #2 system gas intake"},
143 {87,"Aftertreatment #2 system gas outlet"},
144 {88,"Safety Restraint System #2"},
145 {89,"Atmospheric Sensor"},
146 {248,"File Server / Printer"},
147 {249,"Off Board Diagnostic-Service Tool #1"},
148 {250,"Off Board Diagnostic-Service Tool #2"},
149 {251,"On-Board Data Logger"},
150 {252,"Reserved for Experimental Use"},
151 {253,"Reserved for OEM"},
152 {254,"Null Address"},
157 value_string_ext j1939_address_vals_ext = VALUE_STRING_EXT_INIT(j1939_address_vals);
160 j1939_fmt_address(gchar *result, guint32 addr )
162 if ((addr < 128) || (addr > 247))
163 g_snprintf(result, ITEM_LABEL_LENGTH, "%d (%s)", addr, val_to_str_ext_const(addr, &j1939_address_vals_ext, "Reserved"));
165 g_snprintf(result, ITEM_LABEL_LENGTH, "%d (Arbitrary)", addr);
168 struct can_identifier
173 static int dissect_j1939(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
175 proto_item *ti, *can_id_item;
176 proto_tree *j1939_tree, *can_tree, *msg_tree;
179 struct can_identifier can_id;
180 guint32 data_length = tvb_reported_length(tvb);
182 guint8 *src_addr, *dest_addr;
184 DISSECTOR_ASSERT(data);
185 can_id = *((struct can_identifier*)data);
187 if (can_id.id & (~J1939_CANID_MASK))
193 col_set_str(pinfo->cinfo, COL_PROTOCOL, "J1939");
194 col_clear(pinfo->cinfo, COL_INFO);
196 ti = proto_tree_add_item(tree, proto_j1939, tvb, offset, -1, ENC_NA);
197 j1939_tree = proto_item_add_subtree(ti, ett_j1939);
199 ti = proto_tree_add_text(j1939_tree, tvb, 0, 0, "CAN Identifier: 0x%08x", can_id.id);
200 can_tree = proto_item_add_subtree(ti, ett_j1939_can);
201 can_id_item = proto_tree_add_uint(can_tree, hf_j1939_can_id, tvb, 0, 0, can_id.id);
202 PROTO_ITEM_SET_GENERATED(can_id_item);
203 ti = proto_tree_add_uint(can_tree, hf_j1939_priority, tvb, 0, 0, can_id.id);
204 PROTO_ITEM_SET_GENERATED(ti);
205 ti = proto_tree_add_uint(can_tree, hf_j1939_extended_data_page, tvb, 0, 0, can_id.id);
206 PROTO_ITEM_SET_GENERATED(ti);
207 ti = proto_tree_add_uint(can_tree, hf_j1939_data_page, tvb, 0, 0, can_id.id);
208 PROTO_ITEM_SET_GENERATED(ti);
209 ti = proto_tree_add_uint(can_tree, hf_j1939_pdu_format, tvb, 0, 0, can_id.id);
210 PROTO_ITEM_SET_GENERATED(ti);
211 ti = proto_tree_add_uint(can_tree, hf_j1939_pdu_specific, tvb, 0, 0, can_id.id);
212 PROTO_ITEM_SET_GENERATED(ti);
213 ti = proto_tree_add_uint(can_tree, hf_j1939_src_addr, tvb, 0, 0, can_id.id);
214 PROTO_ITEM_SET_GENERATED(ti);
216 /* Set source address */
217 src_addr = (guint8*)wmem_alloc(pinfo->pool, 1);
218 *src_addr = (guint8)(can_id.id & 0xFF);
219 SET_ADDRESS(&pinfo->src, AT_J1939, 1, (const void*)src_addr);
221 pgn = (can_id.id & 0x3FFFF00) >> 8;
223 /* If PF < 240, PS is destination address, last byte of PGN is cleared */
224 if (((can_id.id & 0xFF00) >> 8) < 240)
228 ti = proto_tree_add_uint(can_tree, hf_j1939_dst_addr, tvb, 0, 0, can_id.id);
229 PROTO_ITEM_SET_GENERATED(ti);
233 ti = proto_tree_add_uint(can_tree, hf_j1939_group_extension, tvb, 0, 0, can_id.id);
234 PROTO_ITEM_SET_GENERATED(ti);
237 /* Fill in "destination" address even if its "broadcast" */
238 dest_addr = (guint8*)wmem_alloc(pinfo->pool, 1);
239 *dest_addr = (guint8)((can_id.id & 0xFF00) >> 8);
240 SET_ADDRESS(&pinfo->dst, AT_J1939, 1, (const void*)dest_addr);
242 col_add_fstr(pinfo->cinfo, COL_INFO, "PGN: %d", pgn);
244 /* For now just include raw bytes */
245 col_append_fstr(pinfo->cinfo, COL_INFO, " %s", tvb_bytes_to_ep_str_punct(tvb, 0, data_length, ' '));
247 ti = proto_tree_add_text(j1939_tree, tvb, 0, -1, "Message");
248 msg_tree = proto_item_add_subtree(ti, ett_j1939_message);
250 ti = proto_tree_add_uint(msg_tree, hf_j1939_pgn, tvb, 0, 0, pgn);
251 PROTO_ITEM_SET_GENERATED(ti);
253 if (!dissector_try_uint_new(subdissector_pgn_table, pgn, tvb, pinfo, msg_tree, TRUE, data))
255 proto_tree_add_item(msg_tree, hf_j1939_data, tvb, 0, -1, ENC_NA);
258 return tvb_length(tvb);
261 void proto_register_j1939(void)
263 static hf_register_info hf[] = {
265 {"CAN Identifier", "j1939.can_id",
266 FT_UINT32, BASE_HEX, NULL, J1939_CANID_MASK, NULL, HFILL }
268 { &hf_j1939_priority,
269 {"Priority", "j1939.priority",
270 FT_UINT32, BASE_DEC, NULL, 0x1C000000, NULL, HFILL }
274 FT_UINT32, BASE_DEC, NULL, 0x3FFFFFF, NULL, HFILL }
276 { &hf_j1939_extended_data_page,
277 {"Extended Data Page", "j1939.ex_data_page",
278 FT_UINT32, BASE_DEC, NULL, 0x02000000, NULL, HFILL }
280 { &hf_j1939_data_page,
281 {"Data Page", "j1939.data_page",
282 FT_UINT32, BASE_DEC, NULL, 0x01000000, NULL, HFILL }
284 { &hf_j1939_pdu_format,
285 {"PDU Format", "j1939.pdu_format",
286 FT_UINT32, BASE_DEC, NULL, 0x00FF0000, NULL, HFILL }
288 { &hf_j1939_pdu_specific,
289 {"PDU Specific", "j1939.pdu_specific",
290 FT_UINT32, BASE_DEC, NULL, 0x0000FF00, NULL, HFILL }
292 { &hf_j1939_src_addr,
293 {"Source Address", "j1939.src_addr",
294 FT_UINT32, BASE_CUSTOM, j1939_fmt_address, 0x000000FF, NULL, HFILL }
296 { &hf_j1939_dst_addr,
297 {"Destination Address", "j1939.dst_addr",
298 FT_UINT32, BASE_CUSTOM, j1939_fmt_address, 0x0000FF00, NULL, HFILL }
300 { &hf_j1939_group_extension,
301 {"Group Extension", "j1939.group_extension",
302 FT_UINT32, BASE_DEC, NULL, 0x0000FF00, NULL, HFILL }
305 {"Data", "j1939.data",
306 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
310 static gint *ett[] = {
316 proto_j1939 = proto_register_protocol("SAE J1939", "J1939", "j1939");
318 proto_register_field_array(proto_j1939, hf, array_length(hf));
319 proto_register_subtree_array(ett, array_length(ett));
321 new_register_dissector("j1939", dissect_j1939, proto_j1939);
323 subdissector_pgn_table = register_dissector_table("j1939.pgn", "PGN Handle", FT_UINT32, BASE_DEC);
327 * Editor modelines - http://www.wireshark.org/tools/modelines.html
332 * indent-tabs-mode: nil
335 * vi: set shiftwidth=4 tabstop=8 expandtab:
336 * :indentSize=4:tabSize=8:noTabs=true: