2 * Routines for Token-Ring Media Access Control
3 * Gilbert Ramirez <gram@xiexie.org>
5 * $Id: packet-trmac.c,v 1.31 2001/01/21 22:51:46 guy Exp $
7 * Ethereal - Network traffic analyzer
8 * By Gerald Combs <gerald@zing.org>
9 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
31 #ifdef HAVE_SYS_TYPES_H
32 # include <sys/types.h>
39 static int proto_trmac = -1;
40 static int hf_trmac_mv = -1;
41 static int hf_trmac_length = -1;
42 static int hf_trmac_srcclass = -1;
43 static int hf_trmac_dstclass = -1;
44 static int hf_trmac_sv = -1;
45 static int hf_trmac_errors_iso = -1;
46 static int hf_trmac_errors_line = -1;
47 static int hf_trmac_errors_internal = -1;
48 static int hf_trmac_errors_burst = -1;
49 static int hf_trmac_errors_ac = -1;
50 static int hf_trmac_errors_abort = -1;
51 static int hf_trmac_errors_noniso = -1;
52 static int hf_trmac_errors_lost = -1;
53 static int hf_trmac_errors_congestion = -1;
54 static int hf_trmac_errors_fc = -1;
55 static int hf_trmac_errors_freq = -1;
56 static int hf_trmac_errors_token = -1;
57 static int hf_trmac_naun = -1;
59 static gint ett_tr_mac = -1;
60 static gint ett_tr_ierr_cnt = -1;
61 static gint ett_tr_nerr_cnt = -1;
64 static value_string major_vector_vs[] = {
67 { 0x03, "Claim Token" },
68 { 0x04, "Ring Purge" },
69 { 0x05, "Active Monitor Present" },
70 { 0x06, "Standby Monitor Present" },
71 { 0x07, "Duplicate Address Test" },
72 { 0x09, "Transmit Forward" },
73 { 0x0B, "Remove Ring Station" },
74 { 0x0C, "Change Parameters" },
75 { 0x0D, "Initialize Ring Station" },
76 { 0x0E, "Request Ring Station Address" },
77 { 0x0F, "Request Ring Station Address" },
78 { 0x10, "Request Ring Station Attachments" },
79 { 0x20, "Request Initialization" },
80 { 0x22, "Report Ring Station Address" },
81 { 0x23, "Report Ring Station State" },
82 { 0x24, "Report Ring Station Attachments" },
83 { 0x25, "Report New Active Monitor" },
84 { 0x26, "Report NAUN Change" },
85 { 0x27, "Report Poll Error" },
86 { 0x28, "Report Monitor Errors" },
87 { 0x29, "Report Error" },
88 { 0x2A, "Report Transmit Forward" },
92 /* Src. and Dest. Classes */
93 static value_string classes_vs[] = {
94 { 0x00, "Ring Station" },
95 { 0x01, "LLC Manager" },
96 { 0x04, "Configuration Report Server" },
97 { 0x05, "Ring Parameter Server" },
98 { 0x06, "Ring Error Monitor" },
105 sv_text(tvbuff_t *tvb, int svoff, proto_tree *tree)
107 int sv_length = tvb_get_guint8(tvb, svoff+0);
108 guint16 beacon_type, ring;
110 char *beacon[] = {"Recovery mode set", "Signal loss error",
111 "Streaming signal not Claim Token MAC frame",
112 "Streaming signal, Claim Token MAC frame"};
117 u_char errors[6]; /* isolating or non-isolating */
119 /* this just adds to the clutter on the screen...
120 proto_tree_add_text(tree, tvb, svoff, 1,
121 "Subvector Length: %d bytes", sv_length);*/
123 proto_tree_add_uint_hidden(tree, hf_trmac_sv, tvb, svoff+1, 1, tvb_get_guint8(tvb, svoff+1));
125 switch(tvb_get_guint8(tvb, svoff+1)) {
126 case 0x01: /* Beacon Type */
127 beacon_type = tvb_get_ntohs(tvb, svoff+2);
128 if (beacon_type < array_length(beacon)) {
129 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
130 "Beacon Type: %s", beacon[beacon_type] );
132 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
133 "Beacon Type: Illegal value: %d", beacon_type );
137 case 0x02: /* NAUN */
138 proto_tree_add_ether(tree, hf_trmac_naun, tvb, svoff+1, sv_length-1,
139 tvb_get_ptr(tvb, svoff+2, 6));
142 case 0x03: /* Local Ring Number */
143 ring = tvb_get_ntohs(tvb, svoff+2);
144 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
145 "Local Ring Number: 0x%04X (%d)", ring, ring);
148 case 0x04: /* Assign Physical Location */
149 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
150 "Assign Physical Location: 0x%08X", tvb_get_ntohl(tvb, svoff+2) );
153 case 0x05: /* Soft Error Report Value */
154 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
155 "Soft Error Report Value: %d ms", 10 * tvb_get_ntohs(tvb, svoff+2) );
158 case 0x06: /* Enabled Function Classes */
159 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
160 "Enabled Function Classes: %04X", tvb_get_ntohs(tvb, svoff+2) );
163 case 0x07: /* Allowed Access Priority */
164 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
165 "Allowed Access Priority: %04X", tvb_get_ntohs(tvb, svoff+2) );
168 case 0x09: /* Correlator */
169 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
170 "Correlator: %04X", tvb_get_ntohs(tvb, svoff+2) );
173 case 0x0A: /* Address of last neighbor notification */
174 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
175 "Address of Last Neighbor Notification: %s",
176 ether_to_str(tvb_get_ptr(tvb, svoff+2, 6)));
179 case 0x0B: /* Physical Location */
180 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
181 "Physical Location: 0x%08X", tvb_get_ntohl(tvb, svoff+2) );
184 case 0x20: /* Response Code */
185 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
186 "Response Code: 0x%04X 0x%04X", tvb_get_ntohl(tvb, svoff+2),
187 tvb_get_ntohl(tvb, svoff+4) );
190 case 0x21: /* Reserved */
191 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
192 "Reserved: 0x%04X", tvb_get_ntohs(tvb, svoff+2) );
195 case 0x22: /* Product Instance ID */
196 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
197 "Product Instance ID: ...");
200 case 0x23: /* Ring Station Microcode Level */
201 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
202 "Ring Station Microcode Level: ...");
205 case 0x26: /* Wrap data */
206 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
207 "Wrap Data: ... (%d bytes)", sv_length - 2);
210 case 0x27: /* Frame Forward */
211 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
212 "Frame Forward: ... (%d bytes)", sv_length - 2);
215 case 0x29: /* Ring Station Status Subvector */
216 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
217 "Ring Station Status Subvector: ...");
220 case 0x2A: /* Transmit Status Code */
221 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
222 "Transmit Status Code: %04X", tvb_get_ntohs(tvb, svoff+2) );
225 case 0x2B: /* Group Address */
226 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
227 "Group Address: %08X", tvb_get_ntohl(tvb, svoff+2) );
230 case 0x2C: /* Functional Address */
231 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
232 "Functional Address: %08X", tvb_get_ntohl(tvb, svoff+2) );
235 case 0x2D: /* Isolating Error Counts */
236 memcpy(errors, tvb_get_ptr(tvb, svoff+2, 6), 6);
237 ti = proto_tree_add_uint(tree, hf_trmac_errors_iso, tvb, svoff+1, sv_length-1,
238 errors[0] + errors[1] + errors[2] + errors[3] + errors[4]);
239 sv_tree = proto_item_add_subtree(ti, ett_tr_ierr_cnt);
241 proto_tree_add_uint(sv_tree, hf_trmac_errors_line, tvb, svoff+2, 1, errors[0]);
242 proto_tree_add_uint(sv_tree, hf_trmac_errors_internal, tvb, svoff+3, 1, errors[1]);
243 proto_tree_add_uint(sv_tree, hf_trmac_errors_burst, tvb, svoff+4, 1, errors[2]);
244 proto_tree_add_uint(sv_tree, hf_trmac_errors_ac, tvb, svoff+5, 1, errors[3]);
245 proto_tree_add_uint(sv_tree, hf_trmac_errors_abort, tvb, svoff+6, 1, errors[4]);
249 case 0x2E: /* Non-Isolating Error Counts */
250 memcpy(errors, tvb_get_ptr(tvb, svoff+2, 6), 6);
251 ti = proto_tree_add_uint(tree, hf_trmac_errors_noniso, tvb, svoff+1, sv_length-1,
252 errors[0] + errors[1] + errors[2] + errors[3] + errors[4]);
253 sv_tree = proto_item_add_subtree(ti, ett_tr_nerr_cnt);
255 proto_tree_add_uint(sv_tree, hf_trmac_errors_lost, tvb, svoff+2, 1, errors[0]);
256 proto_tree_add_uint(sv_tree, hf_trmac_errors_congestion, tvb, svoff+3, 1, errors[1]);
257 proto_tree_add_uint(sv_tree, hf_trmac_errors_fc, tvb, svoff+4, 1, errors[2]);
258 proto_tree_add_uint(sv_tree, hf_trmac_errors_freq, tvb, svoff+5, 1, errors[3]);
259 proto_tree_add_uint(sv_tree, hf_trmac_errors_token, tvb, svoff+6, 1, errors[4]);
262 case 0x30: /* Error Code */
263 proto_tree_add_text(tree, tvb, svoff+1, sv_length-1,
264 "Error Code: %04X", tvb_get_ntohs(tvb, svoff+2) );
267 default: /* Unknown */
268 proto_tree_add_text(tree, tvb, svoff+1, 1,
269 "Unknown Sub-Vector: 0x%02X", tvb_get_guint8(tvb, svoff+1));
275 dissect_trmac(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
277 proto_tree *mac_tree = NULL;
279 int mv_length, sv_offset, sv_additional;
283 if (check_col(pinfo->fd, COL_PROTOCOL))
284 col_set_str(pinfo->fd, COL_PROTOCOL, "TR MAC");
285 if (check_col(pinfo->fd, COL_INFO))
286 col_clear(pinfo->fd, COL_INFO);
288 mv_val = tvb_get_guint8(tvb, 3);
290 /* Interpret the major vector */
291 mv_text = val_to_str(mv_val, major_vector_vs, "Unknown Major Vector: %d\n");
293 if (check_col(pinfo->fd, COL_INFO))
294 col_add_str(pinfo->fd, COL_INFO, mv_text);
297 mv_length = tvb_get_ntohs(tvb, 0);
298 ti = proto_tree_add_item(tree, proto_trmac, tvb, 0, mv_length, FALSE);
299 mac_tree = proto_item_add_subtree(ti, ett_tr_mac);
301 proto_tree_add_uint(mac_tree, hf_trmac_mv, tvb, 3, 1, mv_val);
302 proto_tree_add_uint_format(mac_tree, hf_trmac_length, tvb, 0, 2, mv_length,
303 "Total Length: %d bytes", mv_length);
304 proto_tree_add_uint(mac_tree, hf_trmac_srcclass, tvb, 2, 1, tvb_get_guint8(tvb, 2) & 0x0f);
305 proto_tree_add_uint(mac_tree, hf_trmac_dstclass, tvb, 2, 1, tvb_get_guint8(tvb, 2) >> 4 );
307 /* interpret the subvectors */
309 while (sv_offset < mv_length) {
310 sv_additional = sv_text(tvb, sv_offset, mac_tree);
312 /* if this is a bad packet, we could get a 0-length added here,
314 if (sv_additional > 0)
315 sv_offset += sv_additional;
323 proto_register_trmac(void)
325 static hf_register_info hf[] = {
327 { "Major Vector", "trmac.mvec", FT_UINT8, BASE_HEX, major_vector_vs, 0x0,
331 { "Total Length", "trmac.length", FT_UINT8, BASE_DEC, NULL, 0x0,
334 { &hf_trmac_srcclass,
335 { "Source Class", "trmac.srcclass", FT_UINT8, BASE_HEX, classes_vs, 0x0,
338 { &hf_trmac_dstclass,
339 { "Destination Class", "trmac.dstclass", FT_UINT8, BASE_HEX, classes_vs, 0x0,
343 { "Sub-Vector", "trmac.svec", FT_UINT8, BASE_HEX, NULL, 0x0,
346 { &hf_trmac_errors_iso,
347 { "Isolating Errors", "trmac.errors.iso", FT_UINT16, BASE_DEC, NULL, 0x0,
350 { &hf_trmac_errors_line,
351 { "Line Errors", "trmac.errors.line", FT_UINT8, BASE_DEC, NULL, 0x0,
354 { &hf_trmac_errors_internal,
355 { "Internal Errors", "trmac.errors.internal", FT_UINT8, BASE_DEC, NULL, 0x0,
358 { &hf_trmac_errors_burst,
359 { "Burst Errors", "trmac.errors.burst", FT_UINT8, BASE_DEC, NULL, 0x0,
362 { &hf_trmac_errors_ac,
363 { "A/C Errors", "trmac.errors.ac", FT_UINT8, BASE_DEC, NULL, 0x0,
366 { &hf_trmac_errors_abort,
367 { "Abort Delimiter Transmitted Errors", "trmac.errors.abort", FT_UINT8, BASE_DEC, NULL, 0x0,
370 { &hf_trmac_errors_noniso,
371 { "Non-Isolating Errors", "trmac.errors.noniso", FT_UINT16, BASE_DEC, NULL, 0x0,
374 { &hf_trmac_errors_lost,
375 { "Lost Frame Errors", "trmac.errors.lost", FT_UINT8, BASE_DEC, NULL, 0x0,
378 { &hf_trmac_errors_congestion,
379 { "Receiver Congestion Errors", "trmac.errors.congestion", FT_UINT8, BASE_DEC, NULL, 0x0,
382 { &hf_trmac_errors_fc,
383 { "Frame-Copied Errors", "trmac.errors.fc", FT_UINT8, BASE_DEC, NULL, 0x0,
386 { &hf_trmac_errors_freq,
387 { "Frequency Errors", "trmac.errors.freq", FT_UINT8, BASE_DEC, NULL, 0x0,
390 { &hf_trmac_errors_token,
391 { "Token Errors", "trmac.errors.token", FT_UINT8, BASE_DEC, NULL, 0x0,
395 { "NAUN", "trmac.naun", FT_ETHER, BASE_DEC, NULL, 0x0,
398 static gint *ett[] = {
404 proto_trmac = proto_register_protocol("Token-Ring Media Access Control",
406 proto_register_field_array(proto_trmac, hf, array_length(hf));
407 proto_register_subtree_array(ett, array_length(ett));
409 register_dissector("trmac", dissect_trmac, proto_trmac);