1 /* packet-egd.c
2 * Routines for Ethernet Global Data dissection
3 * EGD Home: www.gefanuc.com
4 *
5 * Copyright 2008
6 * 29 July 2008 -- ryan wamsley
7 *
8 * Wireshark - Network traffic analyzer
9 * By Gerald Combs <gerald@wireshark.org>
10 * Copyright 1998 Gerald Combs
11 *
12 * SPDX-License-Identifier: GPL-2.0-or-later
13 */
14
15 #include "config.h"
16
17 #include <epan/packet.h>
18
19 #define EGD_PORT 18246 /* 0x4746 - Not IANA registered */
20
21 #define EGD_ST_NONEW 0
22 #define EGD_ST_NOERROR 1
23 #define EGD_ST_CONSUMED 2
24 #define EGD_ST_SNTPERR 3
25 #define EGD_ST_SPECERR 4
26 #define EGD_ST_REFRESHERR 6
27 #define EGD_ST_REFEXDERR 7
28 #define EGD_ST_IPERR 10
29 #define EGD_ST_RESOURSEERR 12
30 #define EGD_ST_NAMERES 16
31 #define EGD_ST_ETHERR 18
32 #define EGD_ST_NOSUPPORT 22
33 #define EGD_ST_NORESP 26
34 #define EGD_ST_CREATEERR 28
35 #define EGD_ST_DELETED 30
36
37
38 void proto_register_egd(void);
39 void proto_reg_handoff_egd(void);
40
41 /* Translate status to string */
42 static const value_string egd_stat_vals[] = {
43 { EGD_ST_NONEW, "No new status event has occurred" },
44 { EGD_ST_NOERROR, "No error currently exists" },
45 { EGD_ST_CONSUMED, "No error, data consumed" },
46 { EGD_ST_SNTPERR, "SNTP error" },
47 { EGD_ST_SPECERR, "Specification error" },
48 { EGD_ST_REFRESHERR, "Data refresh error" },
49 { EGD_ST_REFEXDERR, "Data refresh period exceeded" },
50 { EGD_ST_IPERR, "IP Layer not currently initialized" },
51 { EGD_ST_RESOURSEERR, "Lack of resource error" },
52 { EGD_ST_NAMERES, "Name Resolution in progress" },
53 { EGD_ST_ETHERR, "Loss of Ethernet Interface error" },
54 { EGD_ST_NOSUPPORT, "Ethernet Interface does not support EGD" },
55 { EGD_ST_NORESP, "No Response from Ethernet Interface" },
56 { EGD_ST_CREATEERR, "Failed to create an exchange." },
57 { EGD_ST_DELETED, "Configured exchange deleted." },
58 { 0, NULL }
59 };
60
61 static int proto_egd = -1;
62
63 static int hf_egd_ver = -1;
64 static int hf_egd_type = -1;
65 static int hf_egd_rid = -1;
66 static int hf_egd_pid = -1;
67 static int hf_egd_exid = -1;
68 static int hf_egd_time = -1;
69 static int hf_egd_notime = -1;
70 static int hf_egd_stat = -1;
71 static int hf_egd_csig = -1;
72 static int hf_egd_resv = -1;
73
74 static gint ett_egd = -1;
75 static gint ett_status_item = -1;
76
dissect_egd(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)77 static int dissect_egd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
78 {
79 /* replace UDP with EGD in display */
80 col_set_str(pinfo->cinfo, COL_PROTOCOL, "EGD");
81
82 /* Clear out stuff in the info column */
83 col_clear(pinfo->cinfo, COL_INFO);
84 col_add_fstr(pinfo->cinfo, COL_INFO, "Data Msg: ExchangeID=0x%08X, RequestID=%05u",
85 tvb_get_letohl(tvb, 8), tvb_get_letohs(tvb, 2));
86
87 if (tree)
88 {
89 proto_item *ti = NULL;
90 proto_item *notime = NULL;
91 proto_tree *egd_tree = NULL;
92 tvbuff_t *next_tvb = NULL;
93 gint offset, data_length;
94 guint32 sectime;
95
96 offset = 0;
97
98 ti = proto_tree_add_item(tree, proto_egd, tvb, 0, -1, ENC_NA);
99 egd_tree = proto_item_add_subtree(ti, ett_egd);
100 proto_tree_add_item(egd_tree, hf_egd_type, tvb, offset, 1, ENC_LITTLE_ENDIAN);
101 offset++;
102 proto_tree_add_item(egd_tree, hf_egd_ver, tvb, offset, 1, ENC_LITTLE_ENDIAN);
103 offset++;
104 proto_tree_add_item(egd_tree, hf_egd_rid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
105 offset += 2;
106 proto_tree_add_item(egd_tree, hf_egd_pid, tvb, offset, 4, ENC_BIG_ENDIAN);
107 offset += 4;
108 proto_tree_add_item(egd_tree, hf_egd_exid, tvb, offset, 4, ENC_LITTLE_ENDIAN);
109 offset += 4;
110
111 /* time */
112 sectime = tvb_get_letohl(tvb, offset);
113 if (0 == sectime)
114 {
115 notime = proto_tree_add_item(egd_tree, hf_egd_notime, tvb, offset, 8, ENC_LITTLE_ENDIAN);
116 proto_item_append_text(notime, "--No TimeStamp");
117 }
118 else
119 {
120 proto_tree_add_item(egd_tree, hf_egd_time, tvb, offset, 8, ENC_LITTLE_ENDIAN);
121 }
122 offset += 8;
123
124 proto_tree_add_item(egd_tree, hf_egd_stat, tvb, offset, 4, ENC_LITTLE_ENDIAN);
125 offset += 4;
126 proto_tree_add_item(egd_tree, hf_egd_csig, tvb, offset, 4, ENC_LITTLE_ENDIAN);
127 offset += 4;
128 proto_tree_add_item(egd_tree, hf_egd_resv, tvb, offset, 4, ENC_LITTLE_ENDIAN);
129 offset += 4;
130
131 data_length = tvb_reported_length_remaining(tvb, offset);
132 if (data_length > 0)
133 {
134 next_tvb = tvb_new_subset_remaining(tvb, offset);
135 call_data_dissector(next_tvb, pinfo, egd_tree);
136 }
137 }
138 return tvb_captured_length(tvb);
139 }
140
proto_register_egd(void)141 void proto_register_egd(void)
142 {
143 static hf_register_info hf[] =
144 {
145 { &hf_egd_ver,
146 { "Version", "egd.ver",
147 FT_UINT8, BASE_DEC,
148 NULL, 0x0,
149 NULL, HFILL }
150 },
151 { &hf_egd_type,
152 { "Type", "egd.type",
153 FT_UINT8, BASE_DEC,
154 NULL, 0x0,
155 NULL, HFILL }
156 },
157 { &hf_egd_rid,
158 { "RequestID", "egd.rid",
159 FT_UINT16, BASE_DEC,
160 NULL, 0x0,
161 NULL, HFILL }
162 },
163 { &hf_egd_pid,
164 { "ProducerID", "egd.pid",
165 FT_IPv4, BASE_NONE,
166 NULL, 0x0,
167 NULL, HFILL }
168 },
169 { &hf_egd_exid,
170 { "ExchangeID", "egd.exid",
171 FT_UINT32, BASE_HEX,
172 NULL, 0x0,
173 NULL, HFILL }
174 },
175 { &hf_egd_time,
176 { "Timestamp", "egd.time",
177 FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL,
178 NULL, 0x0,
179 NULL, HFILL }
180 },
181 { &hf_egd_notime,
182 { "Timestamp", "egd.notime",
183 FT_UINT64, BASE_HEX,
184 NULL, 0x0,
185 NULL, HFILL }
186 },
187 { &hf_egd_stat,
188 { "Status", "egd.stat",
189 FT_UINT32, BASE_DEC,
190 VALS(egd_stat_vals), 0x0,
191 NULL, HFILL }
192 },
193 { &hf_egd_csig,
194 { "ConfigSignature", "egd.csig",
195 FT_UINT32, BASE_DEC,
196 NULL, 0x0,
197 NULL, HFILL }
198 },
199 { &hf_egd_resv,
200 { "Reserved", "egd.rsrv",
201 FT_UINT32, BASE_DEC,
202 NULL, 0x0,
203 NULL, HFILL }
204 }
205 };
206
207 static gint *ett[] =
208 {
209 &ett_egd,
210 &ett_status_item
211 };
212
213 proto_egd = proto_register_protocol ("Ethernet Global Data", "EGD", "egd");
214 proto_register_field_array(proto_egd, hf, array_length(hf));
215 proto_register_subtree_array(ett, array_length(ett));
216 }
217
proto_reg_handoff_egd(void)218 void proto_reg_handoff_egd(void)
219 {
220 dissector_handle_t egd_handle;
221
222 egd_handle = create_dissector_handle(dissect_egd, proto_egd);
223 dissector_add_uint_with_preference("udp.port", EGD_PORT, egd_handle);
224 }
225
226 /*
227 * Editor modelines - https://www.wireshark.org/tools/modelines.html
228 *
229 * Local Variables:
230 * c-basic-offset: 2
231 * tab-width: 8
232 * indent-tabs-mode: nil
233 * End:
234 *
235 * ex: set shiftwidth=2 tabstop=8 expandtab:
236 * :indentSize=2:tabSize=8:noTabs=true:
237 */
238