1 /* packet-sna.c
2 * Routines for SNA
3 * Gilbert Ramirez <gram@alumni.rice.edu>
4 * Jochen Friedrich <jochen@scram.de>
5 *
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
9 *
10 * SPDX-License-Identifier: GPL-2.0-or-later
11 */
12
13 #include "config.h"
14
15 #include <epan/packet.h>
16 #include <epan/llcsaps.h>
17 #include <epan/ppptypes.h>
18 #include <epan/address_types.h>
19 #include <epan/prefs.h>
20 #include <epan/reassemble.h>
21 #include <epan/to_str.h>
22 #include "wsutil/pint.h"
23
24 /*
25 * See:
26 *
27 * http://web.archive.org/web/20020206033700/http://www.wanresources.com/snacell.html
28 *
29 * http://web.archive.org/web/20150522015710/http://www.protocols.com/pbook/sna.htm
30 *
31 * Systems Network Architecture Formats, GA27-3136-20:
32 * https://publibz.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/D50A5007/CCONTENTS
33 *
34 * Systems Network Architecture Management Services Formats, GC31-8302-03:
35 * https://publibfp.boulder.ibm.com/cgi-bin/bookmgr/BOOKS/d50x4002/CCONTENTS
36 */
37 void proto_register_sna(void);
38 void proto_reg_handoff_sna(void);
39
40 static int proto_sna = -1;
41 static int proto_sna_xid = -1;
42 static int hf_sna_th = -1;
43 static int hf_sna_th_0 = -1;
44 static int hf_sna_th_fid = -1;
45 static int hf_sna_th_mpf = -1;
46 static int hf_sna_th_odai = -1;
47 static int hf_sna_th_efi = -1;
48 static int hf_sna_th_daf = -1;
49 static int hf_sna_th_oaf = -1;
50 static int hf_sna_th_snf = -1;
51 static int hf_sna_th_dcf = -1;
52 static int hf_sna_th_lsid = -1;
53 static int hf_sna_th_tg_sweep = -1;
54 static int hf_sna_th_er_vr_supp_ind = -1;
55 static int hf_sna_th_vr_pac_cnt_ind = -1;
56 static int hf_sna_th_ntwk_prty = -1;
57 static int hf_sna_th_tgsf = -1;
58 static int hf_sna_th_mft = -1;
59 static int hf_sna_th_piubf = -1;
60 static int hf_sna_th_iern = -1;
61 static int hf_sna_th_nlpoi = -1;
62 static int hf_sna_th_nlp_cp = -1;
63 static int hf_sna_th_ern = -1;
64 static int hf_sna_th_vrn = -1;
65 static int hf_sna_th_tpf = -1;
66 static int hf_sna_th_vr_cwi = -1;
67 static int hf_sna_th_tg_nonfifo_ind = -1;
68 static int hf_sna_th_vr_sqti = -1;
69 static int hf_sna_th_tg_snf = -1;
70 static int hf_sna_th_vrprq = -1;
71 static int hf_sna_th_vrprs = -1;
72 static int hf_sna_th_vr_cwri = -1;
73 static int hf_sna_th_vr_rwi = -1;
74 static int hf_sna_th_vr_snf_send = -1;
75 static int hf_sna_th_dsaf = -1;
76 static int hf_sna_th_osaf = -1;
77 static int hf_sna_th_snai = -1;
78 static int hf_sna_th_def = -1;
79 static int hf_sna_th_oef = -1;
80 static int hf_sna_th_sa = -1;
81 static int hf_sna_th_cmd_fmt = -1;
82 static int hf_sna_th_cmd_type = -1;
83 static int hf_sna_th_cmd_sn = -1;
84 static int hf_sna_th_byte1 = -1;
85 static int hf_sna_th_byte2 = -1;
86 static int hf_sna_th_byte3 = -1;
87 static int hf_sna_th_byte4 = -1;
88 static int hf_sna_th_byte6 = -1;
89 static int hf_sna_th_byte16 = -1;
90
91 static int hf_sna_nlp_nhdr = -1;
92 static int hf_sna_nlp_nhdr_0 = -1;
93 static int hf_sna_nlp_sm = -1;
94 static int hf_sna_nlp_tpf = -1;
95 static int hf_sna_nlp_nhdr_1 = -1;
96 static int hf_sna_nlp_ft = -1;
97 static int hf_sna_nlp_tspi = -1;
98 static int hf_sna_nlp_slowdn1 = -1;
99 static int hf_sna_nlp_slowdn2 = -1;
100 static int hf_sna_nlp_fra = -1;
101 static int hf_sna_nlp_anr = -1;
102 static int hf_sna_nlp_frh = -1;
103 static int hf_sna_nlp_thdr = -1;
104 static int hf_sna_nlp_tcid = -1;
105 static int hf_sna_nlp_thdr_8 = -1;
106 static int hf_sna_nlp_setupi = -1;
107 static int hf_sna_nlp_somi = -1;
108 static int hf_sna_nlp_eomi = -1;
109 static int hf_sna_nlp_sri = -1;
110 static int hf_sna_nlp_rasapi = -1;
111 static int hf_sna_nlp_retryi = -1;
112 static int hf_sna_nlp_thdr_9 = -1;
113 static int hf_sna_nlp_lmi = -1;
114 static int hf_sna_nlp_cqfi = -1;
115 static int hf_sna_nlp_osi = -1;
116 static int hf_sna_nlp_offset = -1;
117 static int hf_sna_nlp_dlf = -1;
118 static int hf_sna_nlp_bsn = -1;
119 static int hf_sna_nlp_opti_len = -1;
120 static int hf_sna_nlp_opti_type = -1;
121 static int hf_sna_nlp_opti_0d_version = -1;
122 static int hf_sna_nlp_opti_0d_4 = -1;
123 static int hf_sna_nlp_opti_0d_target = -1;
124 static int hf_sna_nlp_opti_0d_arb = -1;
125 static int hf_sna_nlp_opti_0d_reliable = -1;
126 static int hf_sna_nlp_opti_0d_dedicated = -1;
127 static int hf_sna_nlp_opti_0e_stat = -1;
128 static int hf_sna_nlp_opti_0e_gap = -1;
129 static int hf_sna_nlp_opti_0e_idle = -1;
130 static int hf_sna_nlp_opti_0e_nabsp = -1;
131 static int hf_sna_nlp_opti_0e_sync = -1;
132 static int hf_sna_nlp_opti_0e_echo = -1;
133 static int hf_sna_nlp_opti_0e_rseq = -1;
134 /* static int hf_sna_nlp_opti_0e_abspbeg = -1; */
135 /* static int hf_sna_nlp_opti_0e_abspend = -1; */
136 static int hf_sna_nlp_opti_0f_bits = -1;
137 static int hf_sna_nlp_opti_10_tcid = -1;
138 static int hf_sna_nlp_opti_12_sense = -1;
139 static int hf_sna_nlp_opti_14_si_len = -1;
140 static int hf_sna_nlp_opti_14_si_key = -1;
141 static int hf_sna_nlp_opti_14_si_2 = -1;
142 static int hf_sna_nlp_opti_14_si_refifo = -1;
143 static int hf_sna_nlp_opti_14_si_mobility = -1;
144 static int hf_sna_nlp_opti_14_si_dirsearch = -1;
145 static int hf_sna_nlp_opti_14_si_limitres = -1;
146 static int hf_sna_nlp_opti_14_si_ncescope = -1;
147 static int hf_sna_nlp_opti_14_si_mnpsrscv = -1;
148 static int hf_sna_nlp_opti_14_si_maxpsize = -1;
149 static int hf_sna_nlp_opti_14_si_switch = -1;
150 static int hf_sna_nlp_opti_14_si_alive = -1;
151 static int hf_sna_nlp_opti_14_rr_len = -1;
152 static int hf_sna_nlp_opti_14_rr_key = -1;
153 static int hf_sna_nlp_opti_14_rr_2 = -1;
154 static int hf_sna_nlp_opti_14_rr_bfe = -1;
155 static int hf_sna_nlp_opti_14_rr_num = -1;
156 static int hf_sna_nlp_opti_22_2 = -1;
157 static int hf_sna_nlp_opti_22_type = -1;
158 static int hf_sna_nlp_opti_22_raa = -1;
159 static int hf_sna_nlp_opti_22_parity = -1;
160 static int hf_sna_nlp_opti_22_arb = -1;
161 static int hf_sna_nlp_opti_22_3 = -1;
162 static int hf_sna_nlp_opti_22_ratereq = -1;
163 static int hf_sna_nlp_opti_22_raterep = -1;
164 static int hf_sna_nlp_opti_22_field1 = -1;
165 static int hf_sna_nlp_opti_22_field2 = -1;
166 static int hf_sna_nlp_opti_22_field3 = -1;
167 static int hf_sna_nlp_opti_22_field4 = -1;
168
169 static int hf_sna_rh = -1;
170 static int hf_sna_rh_0 = -1;
171 static int hf_sna_rh_1 = -1;
172 static int hf_sna_rh_2 = -1;
173 static int hf_sna_rh_rri = -1;
174 static int hf_sna_rh_ru_category = -1;
175 static int hf_sna_rh_fi = -1;
176 static int hf_sna_rh_sdi = -1;
177 static int hf_sna_rh_bci = -1;
178 static int hf_sna_rh_eci = -1;
179 static int hf_sna_rh_dr1 = -1;
180 static int hf_sna_rh_lcci = -1;
181 static int hf_sna_rh_dr2 = -1;
182 static int hf_sna_rh_eri = -1;
183 static int hf_sna_rh_rti = -1;
184 static int hf_sna_rh_rlwi = -1;
185 static int hf_sna_rh_qri = -1;
186 static int hf_sna_rh_pi = -1;
187 static int hf_sna_rh_bbi = -1;
188 static int hf_sna_rh_ebi = -1;
189 static int hf_sna_rh_cdi = -1;
190 static int hf_sna_rh_csi = -1;
191 static int hf_sna_rh_edi = -1;
192 static int hf_sna_rh_pdi = -1;
193 static int hf_sna_rh_cebi = -1;
194 /*static int hf_sna_ru = -1;*/
195
196 static int hf_sna_gds = -1;
197 static int hf_sna_gds_len = -1;
198 static int hf_sna_gds_type = -1;
199 static int hf_sna_gds_cont = -1;
200 static int hf_sna_gds_info = -1;
201
202 /* static int hf_sna_xid = -1; */
203 static int hf_sna_xid_0 = -1;
204 static int hf_sna_xid_id = -1;
205 static int hf_sna_xid_format = -1;
206 static int hf_sna_xid_type = -1;
207 static int hf_sna_xid_len = -1;
208 static int hf_sna_xid_idblock = -1;
209 static int hf_sna_xid_idnum = -1;
210 static int hf_sna_xid_3_8 = -1;
211 static int hf_sna_xid_3_init_self = -1;
212 static int hf_sna_xid_3_stand_bind = -1;
213 static int hf_sna_xid_3_gener_bind = -1;
214 static int hf_sna_xid_3_recve_bind = -1;
215 static int hf_sna_xid_3_actpu = -1;
216 static int hf_sna_xid_3_nwnode = -1;
217 static int hf_sna_xid_3_cp = -1;
218 static int hf_sna_xid_3_cpcp = -1;
219 static int hf_sna_xid_3_state = -1;
220 static int hf_sna_xid_3_nonact = -1;
221 static int hf_sna_xid_3_cpchange = -1;
222 static int hf_sna_xid_3_10 = -1;
223 static int hf_sna_xid_3_asend_bind = -1;
224 static int hf_sna_xid_3_arecv_bind = -1;
225 static int hf_sna_xid_3_quiesce = -1;
226 static int hf_sna_xid_3_pucap = -1;
227 static int hf_sna_xid_3_pbn = -1;
228 static int hf_sna_xid_3_pacing = -1;
229 static int hf_sna_xid_3_11 = -1;
230 static int hf_sna_xid_3_tgshare = -1;
231 static int hf_sna_xid_3_dedsvc = -1;
232 static int hf_sna_xid_3_12 = -1;
233 static int hf_sna_xid_3_negcsup = -1;
234 static int hf_sna_xid_3_negcomp = -1;
235 static int hf_sna_xid_3_15 = -1;
236 static int hf_sna_xid_3_partg = -1;
237 static int hf_sna_xid_3_dlur = -1;
238 static int hf_sna_xid_3_dlus = -1;
239 static int hf_sna_xid_3_exbn = -1;
240 static int hf_sna_xid_3_genodai = -1;
241 static int hf_sna_xid_3_branch = -1;
242 static int hf_sna_xid_3_brnn = -1;
243 static int hf_sna_xid_3_tg = -1;
244 static int hf_sna_xid_3_dlc = -1;
245 static int hf_sna_xid_3_dlen = -1;
246
247 static int hf_sna_control_len = -1;
248 static int hf_sna_control_key = -1;
249 static int hf_sna_control_hprkey = -1;
250 static int hf_sna_control_05_delay = -1;
251 static int hf_sna_control_05_type = -1;
252 static int hf_sna_control_05_ptp = -1;
253 static int hf_sna_control_0e_type = -1;
254 static int hf_sna_control_0e_value = -1;
255 static int hf_sna_padding = -1;
256 static int hf_sna_reserved = -1;
257 static int hf_sna_biu_segment_data = -1;
258
259 static gint ett_sna = -1;
260 static gint ett_sna_th = -1;
261 static gint ett_sna_th_fid = -1;
262 static gint ett_sna_nlp_nhdr = -1;
263 static gint ett_sna_nlp_nhdr_0 = -1;
264 static gint ett_sna_nlp_nhdr_1 = -1;
265 static gint ett_sna_nlp_thdr = -1;
266 static gint ett_sna_nlp_thdr_8 = -1;
267 static gint ett_sna_nlp_thdr_9 = -1;
268 static gint ett_sna_nlp_opti_un = -1;
269 static gint ett_sna_nlp_opti_0d = -1;
270 static gint ett_sna_nlp_opti_0d_4 = -1;
271 static gint ett_sna_nlp_opti_0e = -1;
272 static gint ett_sna_nlp_opti_0e_stat = -1;
273 static gint ett_sna_nlp_opti_0e_absp = -1;
274 static gint ett_sna_nlp_opti_0f = -1;
275 static gint ett_sna_nlp_opti_10 = -1;
276 static gint ett_sna_nlp_opti_12 = -1;
277 static gint ett_sna_nlp_opti_14 = -1;
278 static gint ett_sna_nlp_opti_14_si = -1;
279 static gint ett_sna_nlp_opti_14_si_2 = -1;
280 static gint ett_sna_nlp_opti_14_rr = -1;
281 static gint ett_sna_nlp_opti_14_rr_2 = -1;
282 static gint ett_sna_nlp_opti_22 = -1;
283 static gint ett_sna_nlp_opti_22_2 = -1;
284 static gint ett_sna_nlp_opti_22_3 = -1;
285 static gint ett_sna_rh = -1;
286 static gint ett_sna_rh_0 = -1;
287 static gint ett_sna_rh_1 = -1;
288 static gint ett_sna_rh_2 = -1;
289 static gint ett_sna_gds = -1;
290 static gint ett_sna_xid_0 = -1;
291 static gint ett_sna_xid_id = -1;
292 static gint ett_sna_xid_3_8 = -1;
293 static gint ett_sna_xid_3_10 = -1;
294 static gint ett_sna_xid_3_11 = -1;
295 static gint ett_sna_xid_3_12 = -1;
296 static gint ett_sna_xid_3_15 = -1;
297 static gint ett_sna_control_un = -1;
298 static gint ett_sna_control_05 = -1;
299 static gint ett_sna_control_05hpr = -1;
300 static gint ett_sna_control_05hpr_type = -1;
301 static gint ett_sna_control_0e = -1;
302
303 static dissector_handle_t sna_handle;
304 static dissector_handle_t sna_xid_handle;
305
306 static int sna_address_type = -1;
307
308 /* Defragment fragmented SNA BIUs*/
309 static gboolean sna_defragment = TRUE;
310 static reassembly_table sna_reassembly_table;
311
312 /* Format Identifier */
313 static const value_string sna_th_fid_vals[] = {
314 { 0x0, "SNA device <--> Non-SNA Device" },
315 { 0x1, "Subarea Nodes, without ER or VR" },
316 { 0x2, "Subarea Node <--> PU2" },
317 { 0x3, "Subarea Node or SNA host <--> Subarea Node" },
318 { 0x4, "Subarea Nodes, supporting ER and VR" },
319 { 0x5, "HPR RTP endpoint nodes" },
320 { 0xa, "HPR NLP Frame Routing" },
321 { 0xb, "HPR NLP Frame Routing" },
322 { 0xc, "HPR NLP Automatic Network Routing" },
323 { 0xd, "HPR NLP Automatic Network Routing" },
324 { 0xf, "Adjacent Subarea Nodes, supporting ER and VR" },
325 { 0x0, NULL }
326 };
327
328 /* Mapping Field */
329 #define MPF_MIDDLE_SEGMENT 0
330 #define MPF_LAST_SEGMENT 1
331 #define MPF_FIRST_SEGMENT 2
332 #define MPF_WHOLE_BIU 3
333
334 static const value_string sna_th_mpf_vals[] = {
335 { MPF_MIDDLE_SEGMENT, "Middle segment of a BIU" },
336 { MPF_LAST_SEGMENT, "Last segment of a BIU" },
337 { MPF_FIRST_SEGMENT, "First segment of a BIU" },
338 { MPF_WHOLE_BIU, "Whole BIU" },
339 { 0, NULL }
340 };
341
342 /* Expedited Flow Indicator */
343 static const value_string sna_th_efi_vals[] = {
344 { 0, "Normal Flow" },
345 { 1, "Expedited Flow" },
346 { 0x0, NULL }
347 };
348
349 /* Request/Response Indicator */
350 static const value_string sna_rh_rri_vals[] = {
351 { 0, "Request" },
352 { 1, "Response" },
353 { 0x0, NULL }
354 };
355
356 /* Request/Response Unit Category */
357 static const value_string sna_rh_ru_category_vals[] = {
358 { 0, "Function Management Data (FMD)" },
359 { 1, "Network Control (NC)" },
360 { 2, "Data Flow Control (DFC)" },
361 { 3, "Session Control (SC)" },
362 { 0x0, NULL }
363 };
364
365 /* Format Indicator */
366 static const true_false_string sna_rh_fi_truth =
367 { "FM Header", "No FM Header" };
368
369 /* Begin Chain Indicator */
370 static const true_false_string sna_rh_bci_truth =
371 { "First in Chain", "Not First in Chain" };
372
373 /* End Chain Indicator */
374 static const true_false_string sna_rh_eci_truth =
375 { "Last in Chain", "Not Last in Chain" };
376
377 /* Lengith-Checked Compression Indicator */
378 static const true_false_string sna_rh_lcci_truth =
379 { "Compressed", "Not Compressed" };
380
381 /* Response Type Indicator */
382 static const true_false_string sna_rh_rti_truth =
383 { "Negative", "Positive" };
384
385 /* Queued Response Indicator */
386 static const true_false_string sna_rh_qri_truth =
387 { "Enqueue response in TC queues", "Response bypasses TC queues" };
388
389 /* Code Selection Indicator */
390 static const value_string sna_rh_csi_vals[] = {
391 { 0, "EBCDIC" },
392 { 1, "ASCII" },
393 { 0x0, NULL }
394 };
395
396 /* TG Sweep */
397 static const value_string sna_th_tg_sweep_vals[] = {
398 { 0, "This PIU may overtake any PU ahead of it." },
399 { 1, "This PIU does not overtake any PIU ahead of it." },
400 { 0x0, NULL }
401 };
402
403 /* ER_VR_SUPP_IND */
404 static const value_string sna_th_er_vr_supp_ind_vals[] = {
405 { 0, "Each node supports ER and VR protocols" },
406 { 1, "Includes at least one node that does not support ER and VR"
407 " protocols" },
408 { 0x0, NULL }
409 };
410
411 /* VR_PAC_CNT_IND */
412 static const value_string sna_th_vr_pac_cnt_ind_vals[] = {
413 { 0, "Pacing count on the VR has not reached 0" },
414 { 1, "Pacing count on the VR has reached 0" },
415 { 0x0, NULL }
416 };
417
418 /* NTWK_PRTY */
419 static const value_string sna_th_ntwk_prty_vals[] = {
420 { 0, "PIU flows at a lower priority" },
421 { 1, "PIU flows at network priority (highest transmission priority)" },
422 { 0x0, NULL }
423 };
424
425 /* TGSF */
426 static const value_string sna_th_tgsf_vals[] = {
427 { 0, "Not segmented" },
428 { 1, "Last segment" },
429 { 2, "First segment" },
430 { 3, "Middle segment" },
431 { 0x0, NULL }
432 };
433
434 /* PIUBF */
435 static const value_string sna_th_piubf_vals[] = {
436 { 0, "Single PIU frame" },
437 { 1, "Last PIU of a multiple PIU frame" },
438 { 2, "First PIU of a multiple PIU frame" },
439 { 3, "Middle PIU of a multiple PIU frame" },
440 { 0x0, NULL }
441 };
442
443 /* NLPOI */
444 static const value_string sna_th_nlpoi_vals[] = {
445 { 0, "NLP starts within this FID4 TH" },
446 { 1, "NLP byte 0 starts after RH byte 0 following NLP C/P pad" },
447 { 0x0, NULL }
448 };
449
450 /* TPF */
451 static const value_string sna_th_tpf_vals[] = {
452 { 0, "Low Priority" },
453 { 1, "Medium Priority" },
454 { 2, "High Priority" },
455 { 3, "Network Priority" },
456 { 0x0, NULL }
457 };
458
459 /* VR_CWI */
460 static const value_string sna_th_vr_cwi_vals[] = {
461 { 0, "Increment window size" },
462 { 1, "Decrement window size" },
463 { 0x0, NULL }
464 };
465
466 /* TG_NONFIFO_IND */
467 static const true_false_string sna_th_tg_nonfifo_ind_truth =
468 { "TG FIFO is not required", "TG FIFO is required" };
469
470 /* VR_SQTI */
471 static const value_string sna_th_vr_sqti_vals[] = {
472 { 0, "Non-sequenced, Non-supervisory" },
473 { 1, "Non-sequenced, Supervisory" },
474 { 2, "Singly-sequenced" },
475 { 0x0, NULL }
476 };
477
478 /* VRPRQ */
479 static const true_false_string sna_th_vrprq_truth = {
480 "VR pacing request is sent asking for a VR pacing response",
481 "No VR pacing response is requested",
482 };
483
484 /* VRPRS */
485 static const true_false_string sna_th_vrprs_truth = {
486 "VR pacing response is sent in response to a VRPRQ bit set",
487 "No pacing response sent",
488 };
489
490 /* VR_CWRI */
491 static const value_string sna_th_vr_cwri_vals[] = {
492 { 0, "Increment window size by 1" },
493 { 1, "Decrement window size by 1" },
494 { 0x0, NULL }
495 };
496
497 /* VR_RWI */
498 static const true_false_string sna_th_vr_rwi_truth = {
499 "Reset window size to the minimum specified in NC_ACTVR",
500 "Do not reset window size",
501 };
502
503 /* Switching Mode */
504 static const value_string sna_nlp_sm_vals[] = {
505 { 5, "Function routing" },
506 { 6, "Automatic network routing" },
507 { 0x0, NULL }
508 };
509
510 static const true_false_string sna_nlp_tspi_truth =
511 { "Time sensitive", "Not time sensitive" };
512
513 static const true_false_string sna_nlp_slowdn1_truth =
514 { "Minor congestion", "No minor congestion" };
515
516 static const true_false_string sna_nlp_slowdn2_truth =
517 { "Major congestion", "No major congestion" };
518
519 /* Function Type */
520 static const value_string sna_nlp_ft_vals[] = {
521 { 0x10, "LDLC" },
522 { 0x0, NULL }
523 };
524
525 static const value_string sna_nlp_frh_vals[] = {
526 { 0x03, "XID complete request" },
527 { 0x04, "XID complete response" },
528 { 0x0, NULL }
529 };
530
531 static const true_false_string sna_nlp_setupi_truth =
532 { "Connection setup segment present", "Connection setup segment not"
533 " present" };
534
535 static const true_false_string sna_nlp_somi_truth =
536 { "Start of message", "Not start of message" };
537
538 static const true_false_string sna_nlp_eomi_truth =
539 { "End of message", "Not end of message" };
540
541 static const true_false_string sna_nlp_sri_truth =
542 { "Status requested", "No status requested" };
543
544 static const true_false_string sna_nlp_rasapi_truth =
545 { "Reply as soon as possible", "No need to reply as soon as possible" };
546
547 static const true_false_string sna_nlp_retryi_truth =
548 { "Undefined", "Sender will retransmit" };
549
550 static const true_false_string sna_nlp_lmi_truth =
551 { "Last message", "Not last message" };
552
553 static const true_false_string sna_nlp_cqfi_truth =
554 { "CQFI included", "CQFI not included" };
555
556 static const true_false_string sna_nlp_osi_truth =
557 { "Optional segments present", "No optional segments present" };
558
559 static const value_string sna_xid_3_state_vals[] = {
560 { 0x00, "Exchange state indicators not supported" },
561 { 0x01, "Negotiation-proceeding exchange" },
562 { 0x02, "Prenegotiation exchange" },
563 { 0x03, "Nonactivation exchange" },
564 { 0x0, NULL }
565 };
566
567 static const value_string sna_xid_3_branch_vals[] = {
568 { 0x00, "Sender does not support branch extender" },
569 { 0x01, "TG is branch uplink" },
570 { 0x02, "TG is branch downlink" },
571 { 0x03, "TG is neither uplink nor downlink" },
572 { 0x0, NULL }
573 };
574
575 static const value_string sna_xid_type_vals[] = {
576 { 0x01, "T1 node" },
577 { 0x02, "T2.0 or T2.1 node" },
578 { 0x03, "Reserved" },
579 { 0x04, "T4 or T5 node" },
580 { 0x0, NULL }
581 };
582
583 static const value_string sna_nlp_opti_vals[] = {
584 { 0x0d, "Connection Setup Segment" },
585 { 0x0e, "Status Segment" },
586 { 0x0f, "Client Out Of Band Bits Segment" },
587 { 0x10, "Connection Identifier Exchange Segment" },
588 { 0x12, "Connection Fault Segment" },
589 { 0x14, "Switching Information Segment" },
590 { 0x22, "Adaptive Rate-Based Segment" },
591 { 0x0, NULL }
592 };
593
594 static const value_string sna_nlp_opti_0d_version_vals[] = {
595 { 0x0101, "Version 1.1" },
596 { 0x0, NULL }
597 };
598
599 static const value_string sna_nlp_opti_0f_bits_vals[] = {
600 { 0x0001, "Request Deactivation" },
601 { 0x8000, "Reply - OK" },
602 { 0x8004, "Reply - Reject" },
603 { 0x0, NULL }
604 };
605
606 static const value_string sna_nlp_opti_22_type_vals[] = {
607 { 0x00, "Setup" },
608 { 0x01, "Rate Reply" },
609 { 0x02, "Rate Request" },
610 { 0x03, "Rate Request/Rate Reply" },
611 { 0x0, NULL }
612 };
613
614 static const value_string sna_nlp_opti_22_raa_vals[] = {
615 { 0x00, "Normal" },
616 { 0x01, "Restraint" },
617 { 0x02, "Slowdown1" },
618 { 0x03, "Slowdown2" },
619 { 0x04, "Critical" },
620 { 0x0, NULL }
621 };
622
623 static const value_string sna_nlp_opti_22_arb_vals[] = {
624 { 0x00, "Base Mode ARB" },
625 { 0x01, "Responsive Mode ARB" },
626 { 0x0, NULL }
627 };
628
629 /* GDS Variable Type */
630 static const value_string sna_gds_var_vals[] = {
631 { 0x1210, "Change Number Of Sessions" },
632 { 0x1211, "Exchange Log Name" },
633 { 0x1212, "Control Point Management Services Unit" },
634 { 0x1213, "Compare States" },
635 { 0x1214, "LU Names Position" },
636 { 0x1215, "LU Name" },
637 { 0x1217, "Do Know" },
638 { 0x1218, "Partner Restart" },
639 { 0x1219, "Don't Know" },
640 { 0x1220, "Sign-Off" },
641 { 0x1221, "Sign-On" },
642 { 0x1222, "SNMP-over-SNA" },
643 { 0x1223, "Node Address Service" },
644 { 0x12C1, "CP Capabilities" },
645 { 0x12C2, "Topology Database Update" },
646 { 0x12C3, "Register Resource" },
647 { 0x12C4, "Locate" },
648 { 0x12C5, "Cross-Domain Initiate" },
649 { 0x12C9, "Delete Resource" },
650 { 0x12CA, "Find Resource" },
651 { 0x12CB, "Found Resource" },
652 { 0x12CC, "Notify" },
653 { 0x12CD, "Initiate-Other Cross-Domain" },
654 { 0x12CE, "Route Setup" },
655 { 0x12E1, "Error Log" },
656 { 0x12F1, "Null Data" },
657 { 0x12F2, "User Control Date" },
658 { 0x12F3, "Map Name" },
659 { 0x12F4, "Error Data" },
660 { 0x12F6, "Authentication Token Data" },
661 { 0x12F8, "Service Flow Authentication Token Data" },
662 { 0x12FF, "Application Data" },
663 { 0x1310, "MDS Message Unit" },
664 { 0x1311, "MDS Routing Information" },
665 { 0x1500, "FID2 Encapsulation" },
666 { 0x0, NULL }
667 };
668
669 /* Control Vector Type */
670 static const value_string sna_control_vals[] = {
671 { 0x00, "SSCP-LU Session Capabilities Control Vector" },
672 { 0x01, "Date-Time Control Vector" },
673 { 0x02, "Subarea Routing Control Vector" },
674 { 0x03, "SDLC Secondary Station Control Vector" },
675 { 0x04, "LU Control Vector" },
676 { 0x05, "Channel Control Vector" },
677 { 0x06, "Cross-Domain Resource Manager (CDRM) Control Vector" },
678 { 0x07, "PU FMD-RU-Usage Control Vector" },
679 { 0x08, "Intensive Mode Control Vector" },
680 { 0x09, "Activation Request / Response Sequence Identifier Control"
681 " Vector" },
682 { 0x0a, "User Request Correlator Control Vector" },
683 { 0x0b, "SSCP-PU Session Capabilities Control Vector" },
684 { 0x0c, "LU-LU Session Capabilities Control Vector" },
685 { 0x0d, "Mode / Class-of-Service / Virtual-Route-Identifier List"
686 " Control Vector" },
687 { 0x0e, "Network Name Control Vector" },
688 { 0x0f, "Link Capabilities and Status Control Vector" },
689 { 0x10, "Product Set ID Control Vector" },
690 { 0x11, "Load Module Correlation Control Vector" },
691 { 0x12, "Network Identifier Control Vector" },
692 { 0x13, "Gateway Support Capabilities Control Vector" },
693 { 0x14, "Session Initiation Control Vector" },
694 { 0x15, "Network-Qualified Address Pair Control Vector" },
695 { 0x16, "Names Substitution Control Vector" },
696 { 0x17, "SSCP Identifier Control Vector" },
697 { 0x18, "SSCP Name Control Vector" },
698 { 0x19, "Resource Identifier Control Vector" },
699 { 0x1a, "NAU Address Control Vector" },
700 { 0x1b, "VRID List Control Vector" },
701 { 0x1c, "Network-Qualified Name Pair Control Vector" },
702 { 0x1e, "VR-ER Mapping Data Control Vector" },
703 { 0x1f, "ER Configuration Control Vector" },
704 { 0x23, "Local-Form Session Identifier Control Vector" },
705 { 0x24, "IPL Load Module Request Control Vector" },
706 { 0x25, "Security ID Control Control Vector" },
707 { 0x26, "Network Connection Endpoint Identifier Control Vector" },
708 { 0x27, "XRF Session Activation Control Vector" },
709 { 0x28, "Related Session Identifier Control Vector" },
710 { 0x29, "Session State Data Control Vector" },
711 { 0x2a, "Session Information Control Vector" },
712 { 0x2b, "Route Selection Control Vector" },
713 { 0x2c, "COS/TPF Control Vector" },
714 { 0x2d, "Mode Control Vector" },
715 { 0x2f, "LU Definition Control Vector" },
716 { 0x30, "Assign LU Characteristics Control Vector" },
717 { 0x31, "BIND Image Control Vector" },
718 { 0x32, "Short-Hold Mode Control Vector" },
719 { 0x33, "ENCP Search Control Control Vector" },
720 { 0x34, "LU Definition Override Control Vector" },
721 { 0x35, "Extended Sense Data Control Vector" },
722 { 0x36, "Directory Error Control Vector" },
723 { 0x37, "Directory Entry Correlator Control Vector" },
724 { 0x38, "Short-Hold Mode Emulation Control Vector" },
725 { 0x39, "Network Connection Endpoint (NCE) Instance Identifier"
726 " Control Vector" },
727 { 0x3a, "Route Status Data Control Vector" },
728 { 0x3b, "VR Congestion Data Control Vector" },
729 { 0x3c, "Associated Resource Entry Control Vector" },
730 { 0x3d, "Directory Entry Control Vector" },
731 { 0x3e, "Directory Entry Characteristic Control Vector" },
732 { 0x3f, "SSCP (SLU) Capabilities Control Vector" },
733 { 0x40, "Real Associated Resource Control Vector" },
734 { 0x41, "Station Parameters Control Vector" },
735 { 0x42, "Dynamic Path Update Data Control Vector" },
736 { 0x43, "Extended SDLC Station Control Vector" },
737 { 0x44, "Node Descriptor Control Vector" },
738 { 0x45, "Node Characteristics Control Vector" },
739 { 0x46, "TG Descriptor Control Vector" },
740 { 0x47, "TG Characteristics Control Vector" },
741 { 0x48, "Topology Resource Descriptor Control Vector" },
742 { 0x49, "Multinode Persistent Sessions (MNPS) LU Names Control"
743 " Vector" },
744 { 0x4a, "Real Owning Control Point Control Vector" },
745 { 0x4b, "RTP Transport Connection Identifier Control Vector" },
746 { 0x51, "DLUR/S Capabilities Control Vector" },
747 { 0x52, "Primary Send Pacing Window Size Control Vector" },
748 { 0x56, "Call Security Verification Control Vector" },
749 { 0x57, "DLC Connection Data Control Vector" },
750 { 0x59, "Installation-Defined CDINIT Data Control Vector" },
751 { 0x5a, "Session Services Extension Support Control Vector" },
752 { 0x5b, "Interchange Node Support Control Vector" },
753 { 0x5c, "APPN Message Transport Control Vector" },
754 { 0x5d, "Subarea Message Transport Control Vector" },
755 { 0x5e, "Related Request Control Vector" },
756 { 0x5f, "Extended Fully Qualified PCID Control Vector" },
757 { 0x60, "Fully Qualified PCID Control Vector" },
758 { 0x61, "HPR Capabilities Control Vector" },
759 { 0x62, "Session Address Control Vector" },
760 { 0x63, "Cryptographic Key Distribution Control Vector" },
761 { 0x64, "TCP/IP Information Control Vector" },
762 { 0x65, "Device Characteristics Control Vector" },
763 { 0x66, "Length-Checked Compression Control Vector" },
764 { 0x67, "Automatic Network Routing (ANR) Path Control Vector" },
765 { 0x68, "XRF/Session Cryptography Control Vector" },
766 { 0x69, "Switched Parameters Control Vector" },
767 { 0x6a, "ER Congestion Data Control Vector" },
768 { 0x71, "Triple DES Cryptography Key Continuation Control Vector" },
769 { 0xfe, "Control Vector Keys Not Recognized" },
770 { 0x0, NULL }
771 };
772
773 static const value_string sna_control_hpr_vals[] = {
774 { 0x00, "Node Identifier Control Vector" },
775 { 0x03, "Network ID Control Vector" },
776 { 0x05, "Network Address Control Vector" },
777 { 0x0, NULL }
778 };
779
780 static const value_string sna_control_0e_type_vals[] = {
781 { 0xF1, "PU Name" },
782 { 0xF3, "LU Name" },
783 { 0xF4, "CP Name" },
784 { 0xF5, "SSCP Name" },
785 { 0xF6, "NNCP Name" },
786 { 0xF7, "Link Station Name" },
787 { 0xF8, "CP Name of CP(PLU)" },
788 { 0xF9, "CP Name of CP(SLU)" },
789 { 0xFA, "Generic Name" },
790 { 0x0, NULL }
791 };
792
793 /* Values to direct the top-most dissector what to dissect
794 * after the TH. */
795 enum next_dissection_enum {
796 stop_here,
797 rh_only,
798 everything
799 };
800
801 enum parse {
802 LT,
803 KL
804 };
805
806 /*
807 * Structure used to represent an FID Type 4 address; gives the layout of the
808 * data pointed to by an AT_SNA "address" structure if the size is
809 * SNA_FID_TYPE_4_ADDR_LEN.
810 */
811 #define SNA_FID_TYPE_4_ADDR_LEN 6
812 struct sna_fid_type_4_addr {
813 guint32 saf;
814 guint16 ef;
815 };
816
817 typedef enum next_dissection_enum next_dissection_t;
818
819 static void dissect_xid (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
820 static void dissect_fid (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
821 static void dissect_nlp (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
822 static void dissect_gds (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
823 static void dissect_rh (tvbuff_t*, int, proto_tree*);
824 static void dissect_sna_control(tvbuff_t* parent_tvb, int offset, int control_len, proto_tree* tree, int hpr, enum parse parse);
825
sna_fid_to_str_buf(const address * addr,gchar * buf,int buf_len _U_)826 static int sna_fid_to_str_buf(const address *addr, gchar *buf, int buf_len _U_)
827 {
828 const guint8 *addrdata;
829 struct sna_fid_type_4_addr sna_fid_type_4_addr;
830 gchar *bufp = buf;
831
832 switch (addr->len) {
833
834 case 1:
835 addrdata = (const guint8 *)addr->data;
836 word_to_hex(buf, addrdata[0]);
837 buf[4] = '\0';
838 break;
839
840 case 2:
841 addrdata = (const guint8 *)addr->data;
842 word_to_hex(buf, pntoh16(&addrdata[0]));
843 buf[4] = '\0';
844 break;
845
846 case SNA_FID_TYPE_4_ADDR_LEN:
847 /* FID Type 4 */
848 memcpy(&sna_fid_type_4_addr, addr->data, SNA_FID_TYPE_4_ADDR_LEN);
849
850 bufp = dword_to_hex(bufp, sna_fid_type_4_addr.saf);
851 *bufp++ = '.';
852 bufp = word_to_hex(bufp, sna_fid_type_4_addr.ef);
853 *bufp++ = '\0'; /* NULL terminate */
854 break;
855 default:
856 buf[0] = '\0';
857 return 1;
858 }
859
860 return (int)strlen(buf)+1;
861 }
862
863
sna_address_str_len(const address * addr _U_)864 static int sna_address_str_len(const address* addr _U_)
865 {
866 /* We could do this based on address length, but 14 bytes isn't THAT much space */
867 return 14;
868 }
869
870
871 /* --------------------------------------------------------------------
872 * Chapter 2 High-Performance Routing (HPR) Headers
873 * --------------------------------------------------------------------
874 */
875
876 static void
dissect_optional_0d(tvbuff_t * tvb,proto_tree * tree)877 dissect_optional_0d(tvbuff_t *tvb, proto_tree *tree)
878 {
879 int offset, len, pad;
880 static int * const fields[] = {
881 &hf_sna_nlp_opti_0d_target,
882 &hf_sna_nlp_opti_0d_arb,
883 &hf_sna_nlp_opti_0d_reliable,
884 &hf_sna_nlp_opti_0d_dedicated,
885 NULL
886 };
887
888 if (!tree)
889 return;
890
891 proto_tree_add_item(tree, hf_sna_nlp_opti_0d_version, tvb, 2, 2, ENC_BIG_ENDIAN);
892
893 proto_tree_add_bitmask(tree, tvb, 4, hf_sna_nlp_opti_0d_4,
894 ett_sna_nlp_opti_0d_4, fields, ENC_NA);
895
896 proto_tree_add_item(tree, hf_sna_reserved, tvb, 5, 3, ENC_NA);
897
898 offset = 8;
899
900 while (tvb_offset_exists(tvb, offset)) {
901 len = tvb_get_guint8(tvb, offset+0);
902 if (len) {
903 dissect_sna_control(tvb, offset, len, tree, 1, LT);
904 pad = (len+3) & 0xfffc;
905 if (pad > len)
906 proto_tree_add_item(tree, hf_sna_padding, tvb, offset+len, pad-len, ENC_NA);
907 offset += pad;
908 } else {
909 /* Avoid endless loop */
910 return;
911 }
912 }
913 }
914
915 static void
dissect_optional_0e(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)916 dissect_optional_0e(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
917 {
918 int bits, offset;
919 static int * const fields[] = {
920 &hf_sna_nlp_opti_0e_gap,
921 &hf_sna_nlp_opti_0e_idle,
922 NULL
923 };
924
925 bits = tvb_get_guint8(tvb, 2);
926 offset = 20;
927
928 proto_tree_add_bitmask(tree, tvb, 2, hf_sna_nlp_opti_0e_stat,
929 ett_sna_nlp_opti_0e_stat, fields, ENC_NA);
930
931 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_nabsp,
932 tvb, 3, 1, ENC_BIG_ENDIAN);
933 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_sync,
934 tvb, 4, 2, ENC_BIG_ENDIAN);
935 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_echo,
936 tvb, 6, 2, ENC_BIG_ENDIAN);
937 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_rseq,
938 tvb, 8, 4, ENC_BIG_ENDIAN);
939 proto_tree_add_item(tree, hf_sna_reserved, tvb, 12, 8, ENC_NA);
940
941 if (tvb_offset_exists(tvb, offset))
942 call_data_dissector(tvb_new_subset_remaining(tvb, 4), pinfo, tree);
943
944 if (bits & 0x40) {
945 col_set_str(pinfo->cinfo, COL_INFO, "HPR Idle Message");
946 } else {
947 col_set_str(pinfo->cinfo, COL_INFO, "HPR Status Message");
948 }
949 }
950
951 static void
dissect_optional_0f(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)952 dissect_optional_0f(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
953 {
954 proto_tree_add_item(tree, hf_sna_nlp_opti_0f_bits, tvb, 2, 2, ENC_BIG_ENDIAN);
955 if (tvb_offset_exists(tvb, 4))
956 call_data_dissector(tvb_new_subset_remaining(tvb, 4), pinfo, tree);
957 }
958
959 static void
dissect_optional_10(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)960 dissect_optional_10(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
961 {
962 proto_tree_add_item(tree, hf_sna_reserved, tvb, 2, 2, ENC_NA);
963 proto_tree_add_item(tree, hf_sna_nlp_opti_10_tcid, tvb, 4, 8, ENC_NA);
964 if (tvb_offset_exists(tvb, 12))
965 call_data_dissector(tvb_new_subset_remaining(tvb, 12), pinfo, tree);
966 }
967
968 static void
dissect_optional_12(tvbuff_t * tvb,proto_tree * tree)969 dissect_optional_12(tvbuff_t *tvb, proto_tree *tree)
970 {
971 proto_tree_add_item(tree, hf_sna_reserved, tvb, 2, 2, ENC_NA);
972 proto_tree_add_item(tree, hf_sna_nlp_opti_12_sense, tvb, 4, -1, ENC_NA);
973 }
974
975 static void
dissect_optional_14(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)976 dissect_optional_14(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
977 {
978 proto_tree *sub_tree;
979 int len, pad, type, offset, num, sublen;
980 static int * const opti_14_si_fields[] = {
981 &hf_sna_nlp_opti_14_si_refifo,
982 &hf_sna_nlp_opti_14_si_mobility,
983 &hf_sna_nlp_opti_14_si_dirsearch,
984 &hf_sna_nlp_opti_14_si_limitres,
985 &hf_sna_nlp_opti_14_si_ncescope,
986 &hf_sna_nlp_opti_14_si_mnpsrscv,
987 NULL
988 };
989 static int * const opti_14_rr_fields[] = {
990 &hf_sna_nlp_opti_14_rr_bfe,
991 NULL
992 };
993
994 proto_tree_add_item(tree, hf_sna_reserved, tvb, 2, 2, ENC_NA);
995
996 offset = 4;
997
998 len = tvb_get_guint8(tvb, offset);
999 type = tvb_get_guint8(tvb, offset+1);
1000
1001 if ((type != 0x83) || (len <= 16)) {
1002 /* Invalid */
1003 call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, tree);
1004 return;
1005 }
1006 sub_tree = proto_tree_add_subtree(tree, tvb, offset, len,
1007 ett_sna_nlp_opti_14_si, NULL, "Switching Information Control Vector");
1008
1009 proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_si_len,
1010 tvb, offset, 1, len);
1011 proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_si_key,
1012 tvb, offset+1, 1, type);
1013
1014 proto_tree_add_bitmask(tree, tvb, offset+2, hf_sna_nlp_opti_14_si_2,
1015 ett_sna_nlp_opti_14_si_2, opti_14_si_fields, ENC_NA);
1016
1017 proto_tree_add_item(sub_tree, hf_sna_reserved, tvb, offset+3, 1, ENC_NA);
1018 proto_tree_add_item(sub_tree, hf_sna_nlp_opti_14_si_maxpsize,
1019 tvb, offset+4, 4, ENC_BIG_ENDIAN);
1020 proto_tree_add_item(sub_tree, hf_sna_nlp_opti_14_si_switch,
1021 tvb, offset+8, 4, ENC_BIG_ENDIAN);
1022 proto_tree_add_item(sub_tree, hf_sna_nlp_opti_14_si_alive,
1023 tvb, offset+12, 4, ENC_BIG_ENDIAN);
1024
1025 dissect_sna_control(tvb, offset+16, len-16, sub_tree, 1, LT);
1026
1027 pad = (len+3) & 0xfffc;
1028 if (pad > len)
1029 proto_tree_add_item(sub_tree, hf_sna_padding, tvb, offset+len, pad-len, ENC_NA);
1030 offset += pad;
1031
1032 len = tvb_get_guint8(tvb, offset);
1033 type = tvb_get_guint8(tvb, offset+1);
1034
1035 if ((type != 0x85) || ( len < 4)) {
1036 /* Invalid */
1037 call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, tree);
1038 return;
1039 }
1040 sub_tree = proto_tree_add_subtree(tree, tvb, offset, len,
1041 ett_sna_nlp_opti_14_rr, NULL, "Return Route TG Descriptor Control Vector");
1042
1043 proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_rr_len,
1044 tvb, offset, 1, len);
1045 proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_rr_key,
1046 tvb, offset+1, 1, type);
1047
1048 proto_tree_add_bitmask(tree, tvb, offset+2, hf_sna_nlp_opti_14_rr_2,
1049 ett_sna_nlp_opti_14_rr_2, opti_14_rr_fields, ENC_NA);
1050
1051 num = tvb_get_guint8(tvb, offset+3);
1052
1053 proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_rr_num,
1054 tvb, offset+3, 1, num);
1055
1056 offset += 4;
1057
1058 while (num) {
1059 sublen = tvb_get_guint8(tvb, offset);
1060 if (sublen) {
1061 dissect_sna_control(tvb, offset, sublen, sub_tree, 1, LT);
1062 } else {
1063 /* Invalid */
1064 call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, tree);
1065 return;
1066 }
1067 /* No padding here */
1068 offset += sublen;
1069 num--;
1070 }
1071 }
1072
1073 static void
dissect_optional_22(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)1074 dissect_optional_22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1075 {
1076 int bits, type;
1077 static int * const opti_22_2_fields[] = {
1078 &hf_sna_nlp_opti_22_type,
1079 &hf_sna_nlp_opti_22_raa,
1080 &hf_sna_nlp_opti_22_parity,
1081 &hf_sna_nlp_opti_22_arb,
1082 NULL
1083 };
1084 static int * const opti_22_3_fields[] = {
1085 &hf_sna_nlp_opti_22_ratereq,
1086 &hf_sna_nlp_opti_22_raterep,
1087 NULL
1088 };
1089
1090 bits = tvb_get_guint8(tvb, 2);
1091 type = (bits & 0xc0) >> 6;
1092
1093 proto_tree_add_bitmask(tree, tvb, 2, hf_sna_nlp_opti_22_2,
1094 ett_sna_nlp_opti_22_2, opti_22_2_fields, ENC_NA);
1095
1096 proto_tree_add_bitmask(tree, tvb, 3, hf_sna_nlp_opti_22_3,
1097 ett_sna_nlp_opti_22_3, opti_22_3_fields, ENC_NA);
1098
1099 proto_tree_add_item(tree, hf_sna_nlp_opti_22_field1,
1100 tvb, 4, 4, ENC_BIG_ENDIAN);
1101 proto_tree_add_item(tree, hf_sna_nlp_opti_22_field2,
1102 tvb, 8, 4, ENC_BIG_ENDIAN);
1103
1104 if (type == 0) {
1105 proto_tree_add_item(tree, hf_sna_nlp_opti_22_field3,
1106 tvb, 12, 4, ENC_BIG_ENDIAN);
1107 proto_tree_add_item(tree, hf_sna_nlp_opti_22_field4,
1108 tvb, 16, 4, ENC_BIG_ENDIAN);
1109
1110 if (tvb_offset_exists(tvb, 20))
1111 call_data_dissector(tvb_new_subset_remaining(tvb, 20), pinfo, tree);
1112 } else {
1113 if (tvb_offset_exists(tvb, 12))
1114 call_data_dissector(tvb_new_subset_remaining(tvb, 12), pinfo, tree);
1115 }
1116 }
1117
1118 static void
dissect_optional(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)1119 dissect_optional(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1120 {
1121 proto_tree *sub_tree;
1122 int offset, type, len;
1123 gint ett;
1124
1125 sub_tree = NULL;
1126
1127 offset = 0;
1128
1129 while (tvb_offset_exists(tvb, offset)) {
1130 len = tvb_get_guint8(tvb, offset);
1131 type = tvb_get_guint8(tvb, offset+1);
1132
1133 /* Prevent loop for invalid crap in packet */
1134 if (len == 0) {
1135 call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, tree);
1136 return;
1137 }
1138
1139 ett = ett_sna_nlp_opti_un;
1140 if(type == 0x0d) ett = ett_sna_nlp_opti_0d;
1141 if(type == 0x0e) ett = ett_sna_nlp_opti_0e;
1142 if(type == 0x0f) ett = ett_sna_nlp_opti_0f;
1143 if(type == 0x10) ett = ett_sna_nlp_opti_10;
1144 if(type == 0x12) ett = ett_sna_nlp_opti_12;
1145 if(type == 0x14) ett = ett_sna_nlp_opti_14;
1146 if(type == 0x22) ett = ett_sna_nlp_opti_22;
1147 if (tree) {
1148 sub_tree = proto_tree_add_subtree(tree, tvb,
1149 offset, len << 2, ett, NULL,
1150 val_to_str(type, sna_nlp_opti_vals,
1151 "Unknown Segment Type"));
1152 proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_len,
1153 tvb, offset, 1, len);
1154 proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_type,
1155 tvb, offset+1, 1, type);
1156 }
1157 switch(type) {
1158 case 0x0d:
1159 dissect_optional_0d(tvb_new_subset_length_caplen(tvb, offset,
1160 len << 2, -1), sub_tree);
1161 break;
1162 case 0x0e:
1163 dissect_optional_0e(tvb_new_subset_length_caplen(tvb, offset,
1164 len << 2, -1), pinfo, sub_tree);
1165 break;
1166 case 0x0f:
1167 dissect_optional_0f(tvb_new_subset_length_caplen(tvb, offset,
1168 len << 2, -1), pinfo, sub_tree);
1169 break;
1170 case 0x10:
1171 dissect_optional_10(tvb_new_subset_length_caplen(tvb, offset,
1172 len << 2, -1), pinfo, sub_tree);
1173 break;
1174 case 0x12:
1175 dissect_optional_12(tvb_new_subset_length_caplen(tvb, offset,
1176 len << 2, -1), sub_tree);
1177 break;
1178 case 0x14:
1179 dissect_optional_14(tvb_new_subset_length_caplen(tvb, offset,
1180 len << 2, -1), pinfo, sub_tree);
1181 break;
1182 case 0x22:
1183 dissect_optional_22(tvb_new_subset_length_caplen(tvb, offset,
1184 len << 2, -1), pinfo, sub_tree);
1185 break;
1186 default:
1187 call_data_dissector(tvb_new_subset_length_caplen(tvb, offset,
1188 len << 2, -1), pinfo, sub_tree);
1189 }
1190 offset += (len << 2);
1191 }
1192 }
1193
1194 static void
dissect_nlp(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,proto_tree * parent_tree)1195 dissect_nlp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1196 proto_tree *parent_tree)
1197 {
1198 proto_tree *nlp_tree;
1199 proto_item *nlp_item;
1200 guint8 nhdr_0, nhdr_1, nhdr_x, thdr_8, thdr_9, fid;
1201 guint32 thdr_len, thdr_dlf;
1202 guint16 subindx;
1203 static int * const nlp_nhdr_0_fields[] = {
1204 &hf_sna_nlp_sm,
1205 &hf_sna_nlp_tpf,
1206 NULL
1207 };
1208 static int * const nlp_nhdr_1_fields[] = {
1209 &hf_sna_nlp_ft,
1210 &hf_sna_nlp_tspi,
1211 &hf_sna_nlp_slowdn1,
1212 &hf_sna_nlp_slowdn2,
1213 NULL
1214 };
1215 static int * const nlp_nhdr_8_fields[] = {
1216 &hf_sna_nlp_setupi,
1217 &hf_sna_nlp_somi,
1218 &hf_sna_nlp_eomi,
1219 &hf_sna_nlp_sri,
1220 &hf_sna_nlp_rasapi,
1221 &hf_sna_nlp_retryi,
1222 NULL
1223 };
1224 static int * const nlp_nhdr_9_fields[] = {
1225 &hf_sna_nlp_lmi,
1226 &hf_sna_nlp_cqfi,
1227 &hf_sna_nlp_osi,
1228 NULL
1229 };
1230
1231 int indx = 0, counter = 0;
1232
1233 nlp_tree = NULL;
1234 nlp_item = NULL;
1235
1236 nhdr_0 = tvb_get_guint8(tvb, indx);
1237 nhdr_1 = tvb_get_guint8(tvb, indx+1);
1238
1239 col_set_str(pinfo->cinfo, COL_INFO, "HPR NLP Packet");
1240
1241 if (tree) {
1242 /* Don't bother setting length. We'll set it later after we
1243 * find the lengths of NHDR */
1244 nlp_item = proto_tree_add_item(tree, hf_sna_nlp_nhdr, tvb,
1245 indx, -1, ENC_NA);
1246 nlp_tree = proto_item_add_subtree(nlp_item, ett_sna_nlp_nhdr);
1247
1248 proto_tree_add_bitmask(nlp_tree, tvb, indx, hf_sna_nlp_nhdr_0,
1249 ett_sna_nlp_nhdr_0, nlp_nhdr_0_fields, ENC_NA);
1250
1251 proto_tree_add_bitmask(nlp_tree, tvb, indx+1, hf_sna_nlp_nhdr_1,
1252 ett_sna_nlp_nhdr_1, nlp_nhdr_1_fields, ENC_NA);
1253 }
1254 /* ANR or FR lists */
1255
1256 indx += 2;
1257 counter = 0;
1258
1259 if ((nhdr_0 & 0xe0) == 0xa0) {
1260 do {
1261 nhdr_x = tvb_get_guint8(tvb, indx + counter);
1262 counter ++;
1263 } while (nhdr_x != 0xff);
1264 proto_tree_add_item(nlp_tree,
1265 hf_sna_nlp_fra, tvb, indx, counter, ENC_NA);
1266 indx += counter;
1267 proto_tree_add_item(nlp_tree, hf_sna_reserved, tvb, indx, 1, ENC_NA);
1268 indx++;
1269
1270 if (tree)
1271 proto_item_set_len(nlp_item, indx);
1272
1273 if ((nhdr_1 & 0xf0) == 0x10) {
1274 proto_tree_add_item(tree, hf_sna_nlp_frh,
1275 tvb, indx, 1, ENC_BIG_ENDIAN);
1276 indx ++;
1277
1278 if (tvb_offset_exists(tvb, indx))
1279 call_data_dissector(tvb_new_subset_remaining(tvb, indx),
1280 pinfo, parent_tree);
1281 return;
1282 }
1283 }
1284 if ((nhdr_0 & 0xe0) == 0xc0) {
1285 do {
1286 nhdr_x = tvb_get_guint8(tvb, indx + counter);
1287 counter ++;
1288 } while (nhdr_x != 0xff);
1289 proto_tree_add_item(nlp_tree, hf_sna_nlp_anr,
1290 tvb, indx, counter, ENC_NA);
1291 indx += counter;
1292
1293 proto_tree_add_item(nlp_tree, hf_sna_reserved, tvb, indx, 1, ENC_NA);
1294 indx++;
1295
1296 if (tree)
1297 proto_item_set_len(nlp_item, indx);
1298 }
1299
1300 thdr_8 = tvb_get_guint8(tvb, indx+8);
1301 thdr_9 = tvb_get_guint8(tvb, indx+9);
1302 thdr_len = tvb_get_ntohs(tvb, indx+10);
1303 thdr_dlf = tvb_get_ntohl(tvb, indx+12);
1304
1305 if (tree) {
1306 nlp_item = proto_tree_add_item(tree, hf_sna_nlp_thdr, tvb,
1307 indx, thdr_len << 2, ENC_NA);
1308 nlp_tree = proto_item_add_subtree(nlp_item, ett_sna_nlp_thdr);
1309
1310 proto_tree_add_item(nlp_tree, hf_sna_nlp_tcid, tvb,
1311 indx, 8, ENC_NA);
1312
1313 proto_tree_add_bitmask(nlp_tree, tvb, indx+8, hf_sna_nlp_thdr_8,
1314 ett_sna_nlp_thdr_8, nlp_nhdr_8_fields, ENC_NA);
1315
1316 proto_tree_add_bitmask(nlp_tree, tvb, indx+9, hf_sna_nlp_thdr_9,
1317 ett_sna_nlp_thdr_9, nlp_nhdr_9_fields, ENC_NA);
1318
1319 proto_tree_add_uint(nlp_tree, hf_sna_nlp_offset, tvb, indx+10,
1320 2, thdr_len);
1321 proto_tree_add_uint(nlp_tree, hf_sna_nlp_dlf, tvb, indx+12,
1322 4, thdr_dlf);
1323 proto_tree_add_item(nlp_tree, hf_sna_nlp_bsn, tvb, indx+16,
1324 4, ENC_BIG_ENDIAN);
1325 }
1326 subindx = 20;
1327
1328 if (((thdr_9 & 0x18) == 0x08) && ((thdr_len << 2) > subindx)) {
1329 counter = tvb_get_guint8(tvb, indx + subindx);
1330 if (tvb_get_guint8(tvb, indx+subindx+1) == 5)
1331 dissect_sna_control(tvb, indx + subindx, counter+2, nlp_tree, 1, LT);
1332 else
1333 call_data_dissector(tvb_new_subset_length_caplen(tvb, indx + subindx, counter+2,
1334 -1), pinfo, nlp_tree);
1335
1336 subindx += (counter+2);
1337 }
1338 if ((thdr_9 & 0x04) && ((thdr_len << 2) > subindx))
1339 dissect_optional(
1340 tvb_new_subset_length_caplen(tvb, indx + subindx,
1341 (thdr_len << 2) - subindx, -1),
1342 pinfo, nlp_tree);
1343
1344 indx += (thdr_len << 2);
1345 if (((thdr_8 & 0x20) == 0) && thdr_dlf) {
1346 col_set_str(pinfo->cinfo, COL_INFO, "HPR Fragment");
1347 if (tvb_offset_exists(tvb, indx)) {
1348 call_data_dissector(tvb_new_subset_remaining(tvb, indx), pinfo,
1349 parent_tree);
1350 }
1351 return;
1352 }
1353 if (tvb_offset_exists(tvb, indx)) {
1354 /* Transmission Header Format Identifier */
1355 fid = hi_nibble(tvb_get_guint8(tvb, indx));
1356 if (fid == 5) /* Only FID5 allowed for HPR */
1357 dissect_fid(tvb_new_subset_remaining(tvb, indx), pinfo,
1358 tree, parent_tree);
1359 else {
1360 if (tvb_get_ntohs(tvb, indx+2) == 0x12ce) {
1361 /* Route Setup */
1362 col_set_str(pinfo->cinfo, COL_INFO, "HPR Route Setup");
1363 dissect_gds(tvb_new_subset_remaining(tvb, indx),
1364 pinfo, tree, parent_tree);
1365 } else
1366 call_data_dissector(tvb_new_subset_remaining(tvb, indx),
1367 pinfo, parent_tree);
1368 }
1369 }
1370 }
1371
1372 /* --------------------------------------------------------------------
1373 * Chapter 3 Exchange Identification (XID) Information Fields
1374 * --------------------------------------------------------------------
1375 */
1376
1377 static void
dissect_xid1(tvbuff_t * tvb,proto_tree * tree)1378 dissect_xid1(tvbuff_t *tvb, proto_tree *tree)
1379 {
1380 proto_tree_add_item(tree, hf_sna_reserved, tvb, 0, 2, ENC_NA);
1381
1382 }
1383
1384 static void
dissect_xid2(tvbuff_t * tvb,proto_tree * tree)1385 dissect_xid2(tvbuff_t *tvb, proto_tree *tree)
1386 {
1387 guint dlen, offset;
1388
1389 if (!tree)
1390 return;
1391
1392 dlen = tvb_get_guint8(tvb, 0);
1393
1394 offset = dlen;
1395
1396 while (tvb_offset_exists(tvb, offset)) {
1397 dlen = tvb_get_guint8(tvb, offset+1);
1398 dissect_sna_control(tvb, offset, dlen+2, tree, 0, KL);
1399 offset += (dlen + 2);
1400 }
1401 }
1402
1403 static void
dissect_xid3(tvbuff_t * tvb,proto_tree * tree)1404 dissect_xid3(tvbuff_t *tvb, proto_tree *tree)
1405 {
1406 guint dlen, offset;
1407 static int * const sna_xid_3_fields[] = {
1408 &hf_sna_xid_3_init_self,
1409 &hf_sna_xid_3_stand_bind,
1410 &hf_sna_xid_3_gener_bind,
1411 &hf_sna_xid_3_recve_bind,
1412 &hf_sna_xid_3_actpu,
1413 &hf_sna_xid_3_nwnode,
1414 &hf_sna_xid_3_cp,
1415 &hf_sna_xid_3_cpcp,
1416 &hf_sna_xid_3_state,
1417 &hf_sna_xid_3_nonact,
1418 &hf_sna_xid_3_cpchange,
1419 NULL
1420 };
1421 static int * const sna_xid_10_fields[] = {
1422 &hf_sna_xid_3_asend_bind,
1423 &hf_sna_xid_3_arecv_bind,
1424 &hf_sna_xid_3_quiesce,
1425 &hf_sna_xid_3_pucap,
1426 &hf_sna_xid_3_pbn,
1427 &hf_sna_xid_3_pacing,
1428 NULL
1429 };
1430 static int * const sna_xid_11_fields[] = {
1431 &hf_sna_xid_3_tgshare,
1432 &hf_sna_xid_3_dedsvc,
1433 NULL
1434 };
1435 static int * const sna_xid_12_fields[] = {
1436 &hf_sna_xid_3_negcsup,
1437 &hf_sna_xid_3_negcomp,
1438 NULL
1439 };
1440 static int * const sna_xid_15_fields[] = {
1441 &hf_sna_xid_3_partg,
1442 &hf_sna_xid_3_dlur,
1443 &hf_sna_xid_3_dlus,
1444 &hf_sna_xid_3_exbn,
1445 &hf_sna_xid_3_genodai,
1446 &hf_sna_xid_3_branch,
1447 &hf_sna_xid_3_brnn,
1448 NULL
1449 };
1450
1451 if (!tree)
1452 return;
1453
1454 proto_tree_add_item(tree, hf_sna_reserved, tvb, 0, 2, ENC_NA);
1455
1456 proto_tree_add_bitmask(tree, tvb, 2, hf_sna_xid_3_8,
1457 ett_sna_xid_3_8, sna_xid_3_fields, ENC_BIG_ENDIAN);
1458
1459 proto_tree_add_bitmask(tree, tvb, 4, hf_sna_xid_3_10,
1460 ett_sna_xid_3_10, sna_xid_10_fields, ENC_BIG_ENDIAN);
1461
1462 proto_tree_add_bitmask(tree, tvb, 5, hf_sna_xid_3_11,
1463 ett_sna_xid_3_11, sna_xid_11_fields, ENC_BIG_ENDIAN);
1464
1465 proto_tree_add_bitmask(tree, tvb, 6, hf_sna_xid_3_12,
1466 ett_sna_xid_3_12, sna_xid_12_fields, ENC_BIG_ENDIAN);
1467
1468 proto_tree_add_item(tree, hf_sna_reserved, tvb, 7, 2, ENC_NA);
1469
1470 proto_tree_add_bitmask(tree, tvb, 9, hf_sna_xid_3_15,
1471 ett_sna_xid_3_15, sna_xid_15_fields, ENC_BIG_ENDIAN);
1472
1473 proto_tree_add_item(tree, hf_sna_xid_3_tg, tvb, 10, 1, ENC_BIG_ENDIAN);
1474 proto_tree_add_item(tree, hf_sna_xid_3_dlc, tvb, 11, 1, ENC_BIG_ENDIAN);
1475
1476 dlen = tvb_get_guint8(tvb, 12);
1477
1478 proto_tree_add_uint(tree, hf_sna_xid_3_dlen, tvb, 12, 1, dlen);
1479
1480 /* FIXME: DLC Dependent Data Go Here */
1481
1482 offset = 12 + dlen;
1483
1484 while (tvb_offset_exists(tvb, offset)) {
1485 dlen = tvb_get_guint8(tvb, offset+1);
1486 dissect_sna_control(tvb, offset, dlen+2, tree, 0, KL);
1487 offset += (dlen+2);
1488 }
1489 }
1490
1491 static void
dissect_xid(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,proto_tree * parent_tree)1492 dissect_xid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1493 proto_tree *parent_tree)
1494 {
1495 proto_tree *sub_tree;
1496 proto_item *sub_ti = NULL;
1497 int format, type, len;
1498 guint32 id;
1499
1500 len = tvb_get_guint8(tvb, 1);
1501 type = tvb_get_guint8(tvb, 0);
1502 id = tvb_get_ntohl(tvb, 2);
1503 format = hi_nibble(type);
1504
1505 /* Summary information */
1506 col_add_fstr(pinfo->cinfo, COL_INFO,
1507 "SNA XID Format:%d Type:%s", format,
1508 val_to_str_const(lo_nibble(type), sna_xid_type_vals,
1509 "Unknown Type"));
1510
1511 if (tree) {
1512 sub_ti = proto_tree_add_item(tree, hf_sna_xid_0, tvb,
1513 0, 1, ENC_BIG_ENDIAN);
1514 sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_0);
1515
1516 proto_tree_add_uint(sub_tree, hf_sna_xid_format, tvb, 0, 1,
1517 type);
1518 proto_tree_add_uint(sub_tree, hf_sna_xid_type, tvb, 0, 1,
1519 type);
1520
1521 proto_tree_add_uint(tree, hf_sna_xid_len, tvb, 1, 1, len);
1522
1523 sub_ti = proto_tree_add_item(tree, hf_sna_xid_id, tvb,
1524 2, 4, ENC_BIG_ENDIAN);
1525 sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_id);
1526
1527 proto_tree_add_uint(sub_tree, hf_sna_xid_idblock, tvb, 2, 4,
1528 id);
1529 proto_tree_add_uint(sub_tree, hf_sna_xid_idnum, tvb, 2, 4,
1530 id);
1531
1532 switch(format) {
1533 case 0:
1534 break;
1535 case 1:
1536 dissect_xid1(tvb_new_subset_length_caplen(tvb, 6, len-6, -1),
1537 tree);
1538 break;
1539 case 2:
1540 dissect_xid2(tvb_new_subset_length_caplen(tvb, 6, len-6, -1),
1541 tree);
1542 break;
1543 case 3:
1544 dissect_xid3(tvb_new_subset_length_caplen(tvb, 6, len-6, -1),
1545 tree);
1546 break;
1547 default:
1548 /* external standards organizations */
1549 call_data_dissector(tvb_new_subset_length_caplen(tvb, 6, len-6, -1),
1550 pinfo, tree);
1551 }
1552 }
1553
1554 if (format == 0)
1555 len = 6;
1556
1557 if (tvb_offset_exists(tvb, len))
1558 call_data_dissector(tvb_new_subset_remaining(tvb, len), pinfo, parent_tree);
1559 }
1560
1561 /* --------------------------------------------------------------------
1562 * Chapter 4 Transmission Headers (THs)
1563 * --------------------------------------------------------------------
1564 */
1565
1566 #define RH_LEN 3
1567
1568 static unsigned int
mpf_value(guint8 th_byte)1569 mpf_value(guint8 th_byte)
1570 {
1571 return (th_byte & 0x0c) >> 2;
1572 }
1573
1574 #define FIRST_FRAG_NUMBER 0
1575 #define MIDDLE_FRAG_NUMBER 1
1576 #define LAST_FRAG_NUMBER 2
1577
1578 /* FID2 is defragged by sequence. The weird thing is that we have neither
1579 * absolute sequence numbers, nor byte offets. Other FIDs have byte offsets
1580 * (the DCF field), but not FID2. The only thing we have to go with is "FIRST",
1581 * "MIDDLE", or "LAST". If the BIU is split into 3 frames, then everything is
1582 * fine, * "FIRST", "MIDDLE", and "LAST" map nicely onto frag-number 0, 1,
1583 * and 2. However, if the BIU is split into 2 frames, then we only have
1584 * "FIRST" and "LAST", and the mapping *should* be frag-number 0 and 1,
1585 * *NOT* 0 and 2.
1586 *
1587 * The SNA docs say "FID2 PIUs cannot be blocked because there is no DCF in the
1588 * TH format for deblocking" (note on Figure 4-2 in the IBM SNA documention,
1589 * see the FTP URL in the comment near the top of this file). I *think*
1590 * this means that the fragmented frames cannot arrive out of order.
1591 * Well, I *want* it to mean this, because w/o this limitation, if you
1592 * get a "FIRST" frame and a "LAST" frame, how long should you wait to
1593 * see if a "MIDDLE" frame every arrives????? Thus, if frames *have* to
1594 * arrive in order, then we're saved.
1595 *
1596 * The problem then boils down to figuring out if "LAST" means frag-number 1
1597 * (in the case of a BIU split into 2 frames) or frag-number 2
1598 * (in the case of a BIU split into 3 frames).
1599 *
1600 * Assuming fragmented FID2 BIU frames *do* arrive in order, the obvious
1601 * way to handle the mapping of "LAST" to either frag-number 1 or
1602 * frag-number 2 is to keep a hash which tracks the frames seen, etc.
1603 * This consumes resources. A trickier way, but a way which works, is to
1604 * always map the "LAST" BIU segment to frag-number 2. Here's the trickery:
1605 * if we add frag-number 2, which we know to be the "LAST" BIU segment,
1606 * and the reassembly code tells us that the the BIU is still not reassmebled,
1607 * then, owing to the, ahem, /fact/, that fragmented BIU segments arrive
1608 * in order :), we know that 1) "FIRST" did come, and 2) there's no "MIDDLE",
1609 * because this BIU was fragmented into 2 frames, not 3. So, we'll be
1610 * tricky and add a zero-length "MIDDLE" BIU frame (i.e, frag-number 1)
1611 * to complete the reassembly.
1612 */
1613 static tvbuff_t*
defragment_by_sequence(packet_info * pinfo,tvbuff_t * tvb,int offset,int mpf,int id)1614 defragment_by_sequence(packet_info *pinfo, tvbuff_t *tvb, int offset, int mpf,
1615 int id)
1616 {
1617 fragment_head *fd_head;
1618 int frag_number = -1;
1619 int more_frags = TRUE;
1620 tvbuff_t *rh_tvb = NULL;
1621 gint frag_len;
1622
1623 /* Determine frag_number and more_frags */
1624 switch(mpf) {
1625 case MPF_WHOLE_BIU:
1626 /* nothing */
1627 break;
1628 case MPF_FIRST_SEGMENT:
1629 frag_number = FIRST_FRAG_NUMBER;
1630 break;
1631 case MPF_MIDDLE_SEGMENT:
1632 frag_number = MIDDLE_FRAG_NUMBER;
1633 break;
1634 case MPF_LAST_SEGMENT:
1635 frag_number = LAST_FRAG_NUMBER;
1636 more_frags = FALSE;
1637 break;
1638 default:
1639 DISSECTOR_ASSERT_NOT_REACHED();
1640 }
1641
1642 /* If sna_defragment is on, and this is a fragment.. */
1643 if (frag_number > -1) {
1644 /* XXX - check length ??? */
1645 frag_len = tvb_reported_length_remaining(tvb, offset);
1646 if (tvb_bytes_exist(tvb, offset, frag_len)) {
1647 fd_head = fragment_add_seq(&sna_reassembly_table,
1648 tvb, offset, pinfo, id, NULL,
1649 frag_number, frag_len, more_frags, 0);
1650
1651 /* We added the LAST segment and reassembly didn't
1652 * complete. Insert a zero-length MIDDLE segment to
1653 * turn a 2-frame BIU-fragmentation into a 3-frame
1654 * BIU-fragmentation (empty middle frag).
1655 * See above long comment about this trickery. */
1656
1657 if (mpf == MPF_LAST_SEGMENT && !fd_head) {
1658 fd_head = fragment_add_seq(&sna_reassembly_table,
1659 tvb, offset, pinfo, id, NULL,
1660 MIDDLE_FRAG_NUMBER, 0, TRUE, 0);
1661 }
1662
1663 if (fd_head != NULL) {
1664 /* We have the complete reassembled payload. */
1665 rh_tvb = tvb_new_chain(tvb, fd_head->tvb_data);
1666
1667 /* Add the defragmented data to the data
1668 * source list. */
1669 add_new_data_source(pinfo, rh_tvb,
1670 "Reassembled SNA BIU");
1671 }
1672 }
1673 }
1674 return rh_tvb;
1675 }
1676
1677 #define SNA_FID01_ADDR_LEN 2
1678
1679 /* FID Types 0 and 1 */
1680 static int
dissect_fid0_1(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)1681 dissect_fid0_1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1682 {
1683 proto_tree *bf_tree;
1684 proto_item *bf_item;
1685 guint8 th_0;
1686
1687 const int bytes_in_header = 10;
1688
1689 if (tree) {
1690 /* Byte 0 */
1691 th_0 = tvb_get_guint8(tvb, 0);
1692 bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1,
1693 th_0);
1694 bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1695
1696 proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
1697 proto_tree_add_uint(bf_tree, hf_sna_th_mpf, tvb, 0, 1, th_0);
1698 proto_tree_add_uint(bf_tree, hf_sna_th_efi, tvb, 0, 1, th_0);
1699
1700 /* Byte 1 */
1701 proto_tree_add_item(tree, hf_sna_reserved, tvb, 1, 1, ENC_NA);
1702
1703 /* Bytes 2-3 */
1704 proto_tree_add_item(tree, hf_sna_th_daf, tvb, 2, 2, ENC_BIG_ENDIAN);
1705 }
1706
1707 /* Set DST addr */
1708 set_address_tvb(&pinfo->net_dst, sna_address_type, SNA_FID01_ADDR_LEN, tvb, 2);
1709 copy_address_shallow(&pinfo->dst, &pinfo->net_dst);
1710
1711 proto_tree_add_item(tree, hf_sna_th_oaf, tvb, 4, 2, ENC_BIG_ENDIAN);
1712
1713 /* Set SRC addr */
1714 set_address_tvb(&pinfo->net_src, sna_address_type, SNA_FID01_ADDR_LEN, tvb, 4);
1715 copy_address_shallow(&pinfo->src, &pinfo->net_src);
1716
1717 proto_tree_add_item(tree, hf_sna_th_snf, tvb, 6, 2, ENC_BIG_ENDIAN);
1718 proto_tree_add_item(tree, hf_sna_th_dcf, tvb, 8, 2, ENC_BIG_ENDIAN);
1719
1720 return bytes_in_header;
1721 }
1722
1723 #define SNA_FID2_ADDR_LEN 1
1724
1725 /* FID Type 2 */
1726 static int
dissect_fid2(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,tvbuff_t ** rh_tvb_ptr,next_dissection_t * continue_dissecting)1727 dissect_fid2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1728 tvbuff_t **rh_tvb_ptr, next_dissection_t *continue_dissecting)
1729 {
1730 proto_tree *bf_tree;
1731 proto_item *bf_item;
1732 guint8 th_0;
1733 unsigned int mpf, id;
1734
1735 const int bytes_in_header = 6;
1736
1737 th_0 = tvb_get_guint8(tvb, 0);
1738 mpf = mpf_value(th_0);
1739
1740 if (tree) {
1741
1742 /* Byte 0 */
1743 bf_item = proto_tree_add_item(tree, hf_sna_th_0, tvb, 0, 1, ENC_BIG_ENDIAN);
1744 bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1745
1746 proto_tree_add_item(bf_tree, hf_sna_th_fid, tvb, 0, 1, ENC_BIG_ENDIAN);
1747 proto_tree_add_item(bf_tree, hf_sna_th_mpf, tvb, 0, 1, ENC_BIG_ENDIAN);
1748 proto_tree_add_item(bf_tree, hf_sna_th_odai,tvb, 0, 1, ENC_BIG_ENDIAN);
1749 proto_tree_add_item(bf_tree, hf_sna_th_efi, tvb, 0, 1, ENC_BIG_ENDIAN);
1750
1751
1752 /* Byte 1 */
1753 proto_tree_add_item(tree, hf_sna_reserved, tvb, 1, 1, ENC_NA);
1754
1755 /* Byte 2 */
1756 proto_tree_add_item(tree, hf_sna_th_daf, tvb, 2, 1, ENC_BIG_ENDIAN);
1757 }
1758
1759 /* Set DST addr */
1760 set_address_tvb(&pinfo->net_dst, sna_address_type, SNA_FID2_ADDR_LEN, tvb, 2);
1761 copy_address_shallow(&pinfo->dst, &pinfo->net_dst);
1762
1763 /* Byte 3 */
1764 proto_tree_add_item(tree, hf_sna_th_oaf, tvb, 3, 1, ENC_BIG_ENDIAN);
1765
1766 /* Set SRC addr */
1767 set_address_tvb(&pinfo->net_src, sna_address_type, SNA_FID2_ADDR_LEN, tvb, 3);
1768 copy_address_shallow(&pinfo->src, &pinfo->net_src);
1769
1770 id = tvb_get_ntohs(tvb, 4);
1771 proto_tree_add_item(tree, hf_sna_th_snf, tvb, 4, 2, ENC_BIG_ENDIAN);
1772
1773 if (mpf != MPF_WHOLE_BIU && !sna_defragment) {
1774 if (mpf == MPF_FIRST_SEGMENT) {
1775 *continue_dissecting = rh_only;
1776 } else {
1777 *continue_dissecting = stop_here;
1778 }
1779
1780 }
1781 else if (sna_defragment) {
1782 *rh_tvb_ptr = defragment_by_sequence(pinfo, tvb,
1783 bytes_in_header, mpf, id);
1784 }
1785
1786 return bytes_in_header;
1787 }
1788
1789 /* FID Type 3 */
1790 static int
dissect_fid3(tvbuff_t * tvb,proto_tree * tree)1791 dissect_fid3(tvbuff_t *tvb, proto_tree *tree)
1792 {
1793 proto_tree *bf_tree;
1794 proto_item *bf_item;
1795 guint8 th_0;
1796
1797 const int bytes_in_header = 2;
1798
1799 /* If we're not filling a proto_tree, return now */
1800 if (!tree)
1801 return bytes_in_header;
1802
1803 th_0 = tvb_get_guint8(tvb, 0);
1804
1805 /* Create the bitfield tree */
1806 bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1, th_0);
1807 bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1808
1809 proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
1810 proto_tree_add_uint(bf_tree, hf_sna_th_mpf, tvb, 0, 1, th_0);
1811 proto_tree_add_uint(bf_tree, hf_sna_th_efi, tvb, 0, 1, th_0);
1812
1813 proto_tree_add_item(tree, hf_sna_th_lsid, tvb, 1, 1, ENC_BIG_ENDIAN);
1814
1815 return bytes_in_header;
1816 }
1817
1818 static int
dissect_fid4(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)1819 dissect_fid4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1820 {
1821 int offset = 0;
1822 guint8 th_byte, mft;
1823 guint16 def, oef;
1824 guint32 dsaf, osaf;
1825 static int * const byte0_fields[] = {
1826 &hf_sna_th_fid,
1827 &hf_sna_th_tg_sweep,
1828 &hf_sna_th_er_vr_supp_ind,
1829 &hf_sna_th_vr_pac_cnt_ind,
1830 &hf_sna_th_ntwk_prty,
1831 NULL
1832 };
1833 static int * const byte1_fields[] = {
1834 &hf_sna_th_tgsf,
1835 &hf_sna_th_mft,
1836 &hf_sna_th_piubf,
1837 NULL
1838 };
1839 static int * const byte2_mft_fields[] = {
1840 &hf_sna_th_nlpoi,
1841 &hf_sna_th_nlp_cp,
1842 &hf_sna_th_ern,
1843 NULL
1844 };
1845 static int * const byte2_fields[] = {
1846 &hf_sna_th_iern,
1847 &hf_sna_th_ern,
1848 NULL
1849 };
1850 static int * const byte3_fields[] = {
1851 &hf_sna_th_vrn,
1852 &hf_sna_th_tpf,
1853 NULL
1854 };
1855 static int * const byte4_fields[] = {
1856 &hf_sna_th_vr_cwi,
1857 &hf_sna_th_tg_nonfifo_ind,
1858 &hf_sna_th_vr_sqti,
1859 /* I'm not sure about byte-order on this one... */
1860 &hf_sna_th_tg_snf,
1861 NULL
1862 };
1863 static int * const byte6_fields[] = {
1864 &hf_sna_th_vrprq,
1865 &hf_sna_th_vrprs,
1866 &hf_sna_th_vr_cwri,
1867 &hf_sna_th_vr_rwi,
1868 /* I'm not sure about byte-order on this one... */
1869 &hf_sna_th_vr_snf_send,
1870 NULL
1871 };
1872 static int * const byte16_fields[] = {
1873 &hf_sna_th_snai,
1874 /* We luck out here because in their infinite wisdom the SNA
1875 * architects placed the MPF and EFI fields in the same bitfield
1876 * locations, even though for FID4 they're not in byte 0.
1877 * Thank you IBM! */
1878 &hf_sna_th_mpf,
1879 &hf_sna_th_efi,
1880 NULL
1881 };
1882
1883 struct sna_fid_type_4_addr *src, *dst;
1884
1885 const int bytes_in_header = 26;
1886
1887 /* If we're not filling a proto_tree, return now */
1888 if (!tree)
1889 return bytes_in_header;
1890
1891 /* Byte 0 */
1892 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_0,
1893 ett_sna_th_fid, byte0_fields, ENC_NA);
1894
1895 offset += 1;
1896 th_byte = tvb_get_guint8(tvb, offset);
1897
1898 /* Byte 1 */
1899 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_byte1,
1900 ett_sna_th_fid, byte1_fields, ENC_NA);
1901
1902 mft = th_byte & 0x04;
1903 offset += 1;
1904
1905 /* Byte 2 */
1906 if (mft) {
1907 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_byte2,
1908 ett_sna_th_fid, byte2_mft_fields, ENC_NA);
1909 } else {
1910 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_byte2,
1911 ett_sna_th_fid, byte2_fields, ENC_NA);
1912 }
1913
1914 offset += 1;
1915
1916 /* Byte 3 */
1917 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_byte3,
1918 ett_sna_th_fid, byte3_fields, ENC_NA);
1919 offset += 1;
1920
1921 /* Bytes 4-5 */
1922 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_byte4,
1923 ett_sna_th_fid, byte4_fields, ENC_BIG_ENDIAN);
1924 offset += 2;
1925
1926 /* Create the bitfield tree */
1927 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_byte6,
1928 ett_sna_th_fid, byte6_fields, ENC_BIG_ENDIAN);
1929 offset += 2;
1930
1931 dsaf = tvb_get_ntohl(tvb, 8);
1932 /* Bytes 8-11 */
1933 proto_tree_add_uint(tree, hf_sna_th_dsaf, tvb, offset, 4, dsaf);
1934
1935 offset += 4;
1936
1937 osaf = tvb_get_ntohl(tvb, 12);
1938 /* Bytes 12-15 */
1939 proto_tree_add_uint(tree, hf_sna_th_osaf, tvb, offset, 4, osaf);
1940
1941 offset += 4;
1942
1943 /* Byte 16 */
1944 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_th_byte16,
1945 ett_sna_th_fid, byte16_fields, ENC_NA);
1946
1947 /* 1 for byte 16, 1 for byte 17 which is reserved */
1948 offset += 2;
1949
1950 def = tvb_get_ntohs(tvb, 18);
1951 /* Bytes 18-25 */
1952 proto_tree_add_uint(tree, hf_sna_th_def, tvb, offset, 2, def);
1953
1954 /* Addresses in FID 4 are discontiguous, sigh */
1955 dst = wmem_new0(pinfo->pool, struct sna_fid_type_4_addr);
1956 dst->saf = dsaf;
1957 dst->ef = def;
1958 set_address(&pinfo->net_dst, sna_address_type, SNA_FID_TYPE_4_ADDR_LEN, dst);
1959 copy_address_shallow(&pinfo->dst, &pinfo->net_dst);
1960
1961 oef = tvb_get_ntohs(tvb, 20);
1962 proto_tree_add_uint(tree, hf_sna_th_oef, tvb, offset+2, 2, oef);
1963
1964 /* Addresses in FID 4 are discontiguous, sigh */
1965 src = wmem_new0(pinfo->pool, struct sna_fid_type_4_addr);
1966 src->saf = osaf;
1967 src->ef = oef;
1968 set_address(&pinfo->net_src, sna_address_type, SNA_FID_TYPE_4_ADDR_LEN, src);
1969 copy_address_shallow(&pinfo->src, &pinfo->net_src);
1970
1971 proto_tree_add_item(tree, hf_sna_th_snf, tvb, offset+4, 2, ENC_BIG_ENDIAN);
1972 proto_tree_add_item(tree, hf_sna_th_dcf, tvb, offset+6, 2, ENC_BIG_ENDIAN);
1973
1974 return bytes_in_header;
1975 }
1976
1977 /* FID Type 5 */
1978 static int
dissect_fid5(tvbuff_t * tvb,proto_tree * tree)1979 dissect_fid5(tvbuff_t *tvb, proto_tree *tree)
1980 {
1981 proto_tree *bf_tree;
1982 proto_item *bf_item;
1983 guint8 th_0;
1984
1985 const int bytes_in_header = 12;
1986
1987 /* If we're not filling a proto_tree, return now */
1988 if (!tree)
1989 return bytes_in_header;
1990
1991 th_0 = tvb_get_guint8(tvb, 0);
1992
1993 /* Create the bitfield tree */
1994 bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1, th_0);
1995 bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1996
1997 proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
1998 proto_tree_add_uint(bf_tree, hf_sna_th_mpf, tvb, 0, 1, th_0);
1999 proto_tree_add_uint(bf_tree, hf_sna_th_efi, tvb, 0, 1, th_0);
2000
2001 proto_tree_add_item(tree, hf_sna_reserved, tvb, 1, 1, ENC_NA);
2002 proto_tree_add_item(tree, hf_sna_th_snf, tvb, 2, 2, ENC_BIG_ENDIAN);
2003
2004 proto_tree_add_item(tree, hf_sna_th_sa, tvb, 4, 8, ENC_NA);
2005
2006 return bytes_in_header;
2007
2008 }
2009
2010 /* FID Type f */
2011 static int
dissect_fidf(tvbuff_t * tvb,proto_tree * tree)2012 dissect_fidf(tvbuff_t *tvb, proto_tree *tree)
2013 {
2014 proto_tree *bf_tree;
2015 proto_item *bf_item;
2016 guint8 th_0;
2017
2018 const int bytes_in_header = 26;
2019
2020 /* If we're not filling a proto_tree, return now */
2021 if (!tree)
2022 return bytes_in_header;
2023
2024 th_0 = tvb_get_guint8(tvb, 0);
2025
2026 /* Create the bitfield tree */
2027 bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1, th_0);
2028 bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
2029
2030 proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
2031 proto_tree_add_item(tree, hf_sna_reserved, tvb, 1, 1, ENC_NA);
2032
2033 proto_tree_add_item(tree, hf_sna_th_cmd_fmt, tvb, 2, 1, ENC_BIG_ENDIAN);
2034 proto_tree_add_item(tree, hf_sna_th_cmd_type, tvb, 3, 1, ENC_BIG_ENDIAN);
2035 proto_tree_add_item(tree, hf_sna_th_cmd_sn, tvb, 4, 2, ENC_BIG_ENDIAN);
2036
2037 /* Yup, bytes 6-23 are reserved! */
2038 proto_tree_add_item(tree, hf_sna_reserved, tvb, 6, 18, ENC_NA);
2039
2040 proto_tree_add_item(tree, hf_sna_th_dcf, tvb, 24, 2, ENC_BIG_ENDIAN);
2041
2042 return bytes_in_header;
2043 }
2044
2045 static void
dissect_fid(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,proto_tree * parent_tree)2046 dissect_fid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
2047 proto_tree *parent_tree)
2048 {
2049
2050 proto_tree *th_tree = NULL, *rh_tree = NULL;
2051 proto_item *th_ti = NULL, *rh_ti = NULL;
2052 guint8 th_fid;
2053 int th_header_len = 0;
2054 int offset, rh_offset;
2055 tvbuff_t *rh_tvb = NULL;
2056 next_dissection_t continue_dissecting = everything;
2057
2058 /* Transmission Header Format Identifier */
2059 th_fid = hi_nibble(tvb_get_guint8(tvb, 0));
2060
2061 /* Summary information */
2062 col_add_str(pinfo->cinfo, COL_INFO,
2063 val_to_str(th_fid, sna_th_fid_vals, "Unknown FID: %01x"));
2064
2065 if (tree) {
2066 /* --- TH --- */
2067 /* Don't bother setting length. We'll set it later after we
2068 * find the length of TH */
2069 th_ti = proto_tree_add_item(tree, hf_sna_th, tvb, 0, -1,
2070 ENC_NA);
2071 th_tree = proto_item_add_subtree(th_ti, ett_sna_th);
2072 }
2073
2074 /* Get size of TH */
2075 switch(th_fid) {
2076 case 0x0:
2077 case 0x1:
2078 th_header_len = dissect_fid0_1(tvb, pinfo, th_tree);
2079 break;
2080 case 0x2:
2081 th_header_len = dissect_fid2(tvb, pinfo, th_tree,
2082 &rh_tvb, &continue_dissecting);
2083 break;
2084 case 0x3:
2085 th_header_len = dissect_fid3(tvb, th_tree);
2086 break;
2087 case 0x4:
2088 th_header_len = dissect_fid4(tvb, pinfo, th_tree);
2089 break;
2090 case 0x5:
2091 th_header_len = dissect_fid5(tvb, th_tree);
2092 break;
2093 case 0xf:
2094 th_header_len = dissect_fidf(tvb, th_tree);
2095 break;
2096 default:
2097 call_data_dissector(tvb_new_subset_remaining(tvb, 1), pinfo, parent_tree);
2098 return;
2099 }
2100
2101 offset = th_header_len;
2102
2103 /* Short-circuit ? */
2104 if (continue_dissecting == stop_here) {
2105 proto_tree_add_item(tree, hf_sna_biu_segment_data, tvb, offset, -1, ENC_NA);
2106 return;
2107 }
2108
2109 /* If the FID dissector function didn't create an rh_tvb, then we just
2110 * use the rest of our tvbuff as the rh_tvb. */
2111 if (!rh_tvb)
2112 rh_tvb = tvb_new_subset_remaining(tvb, offset);
2113 rh_offset = 0;
2114
2115 /* Process the rest of the SNA packet, starting with RH */
2116 if (tree) {
2117 proto_item_set_len(th_ti, th_header_len);
2118
2119 /* --- RH --- */
2120 rh_ti = proto_tree_add_item(tree, hf_sna_rh, rh_tvb, rh_offset,
2121 RH_LEN, ENC_NA);
2122 rh_tree = proto_item_add_subtree(rh_ti, ett_sna_rh);
2123 dissect_rh(rh_tvb, rh_offset, rh_tree);
2124 }
2125
2126 rh_offset += RH_LEN;
2127
2128 if (tvb_offset_exists(rh_tvb, rh_offset)) {
2129 /* Short-circuit ? */
2130 if (continue_dissecting == rh_only) {
2131 proto_tree_add_item(tree, hf_sna_biu_segment_data, rh_tvb, rh_offset, -1, ENC_NA);
2132 return;
2133 }
2134
2135 call_data_dissector(tvb_new_subset_remaining(rh_tvb, rh_offset),
2136 pinfo, parent_tree);
2137 }
2138 }
2139
2140 /* --------------------------------------------------------------------
2141 * Chapter 5 Request/Response Headers (RHs)
2142 * --------------------------------------------------------------------
2143 */
2144
2145 static void
dissect_rh(tvbuff_t * tvb,int offset,proto_tree * tree)2146 dissect_rh(tvbuff_t *tvb, int offset, proto_tree *tree)
2147 {
2148 gboolean is_response;
2149 guint8 rh_0;
2150 static int * const sna_rh_fields[] = {
2151 &hf_sna_rh_rri,
2152 &hf_sna_rh_ru_category,
2153 &hf_sna_rh_fi,
2154 &hf_sna_rh_sdi,
2155 &hf_sna_rh_bci,
2156 &hf_sna_rh_eci,
2157 NULL
2158 };
2159 static int * const sna_rh_1_req_fields[] = {
2160 &hf_sna_rh_dr1,
2161 &hf_sna_rh_lcci,
2162 &hf_sna_rh_dr2,
2163 &hf_sna_rh_eri,
2164 &hf_sna_rh_rlwi,
2165 &hf_sna_rh_qri,
2166 &hf_sna_rh_pi,
2167 NULL
2168 };
2169 static int * const sna_rh_1_rsp_fields[] = {
2170 &hf_sna_rh_dr1,
2171 &hf_sna_rh_dr2,
2172 &hf_sna_rh_rti,
2173 &hf_sna_rh_qri,
2174 &hf_sna_rh_pi,
2175 NULL
2176 };
2177 static int * const sna_rh_2_req_fields[] = {
2178 &hf_sna_rh_bbi,
2179 &hf_sna_rh_ebi,
2180 &hf_sna_rh_cdi,
2181 &hf_sna_rh_csi,
2182 &hf_sna_rh_edi,
2183 &hf_sna_rh_pdi,
2184 &hf_sna_rh_cebi,
2185 NULL
2186 };
2187
2188 if (!tree)
2189 return;
2190
2191 /* Create the bitfield tree for byte 0*/
2192 rh_0 = tvb_get_guint8(tvb, offset);
2193 is_response = (rh_0 & 0x80);
2194
2195 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_rh_0,
2196 ett_sna_rh_0, sna_rh_fields, ENC_BIG_ENDIAN);
2197 offset += 1;
2198
2199 /* Create the bitfield tree for byte 1*/
2200 if (is_response) {
2201 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_rh_1,
2202 ett_sna_rh_1, sna_rh_1_rsp_fields, ENC_BIG_ENDIAN);
2203 } else {
2204 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_rh_1,
2205 ett_sna_rh_1, sna_rh_1_req_fields, ENC_BIG_ENDIAN);
2206 }
2207 offset += 1;
2208
2209 /* Create the bitfield tree for byte 2*/
2210 if (!is_response) {
2211 proto_tree_add_bitmask(tree, tvb, offset, hf_sna_rh_2,
2212 ett_sna_rh_2, sna_rh_2_req_fields, ENC_BIG_ENDIAN);
2213 } else {
2214 proto_tree_add_item(tree, hf_sna_rh_2, tvb, offset, 1, ENC_BIG_ENDIAN);
2215 }
2216
2217 /* XXX - check for sdi. If TRUE, the next 4 bytes will be sense data */
2218 }
2219
2220 /* --------------------------------------------------------------------
2221 * Chapter 6 Request/Response Units (RUs)
2222 * --------------------------------------------------------------------
2223 */
2224
2225 /* --------------------------------------------------------------------
2226 * Chapter 9 Common Fields
2227 * --------------------------------------------------------------------
2228 */
2229
2230 static void
dissect_control_05hpr(tvbuff_t * tvb,proto_tree * tree,int hpr,enum parse parse)2231 dissect_control_05hpr(tvbuff_t *tvb, proto_tree *tree, int hpr,
2232 enum parse parse)
2233 {
2234 guint16 offset, len, pad;
2235 static int * const sna_control_05hpr_fields[] = {
2236 &hf_sna_control_05_ptp,
2237 NULL
2238 };
2239
2240 if (!tree)
2241 return;
2242
2243 proto_tree_add_bitmask(tree, tvb, 2, hf_sna_control_05_type,
2244 ett_sna_control_05hpr_type, sna_control_05hpr_fields, ENC_BIG_ENDIAN);
2245
2246 proto_tree_add_item(tree, hf_sna_reserved, tvb, 3, 1, ENC_NA);
2247
2248 offset = 4;
2249
2250 while (tvb_offset_exists(tvb, offset)) {
2251 if (parse == LT) {
2252 len = tvb_get_guint8(tvb, offset+0);
2253 } else {
2254 len = tvb_get_guint8(tvb, offset+1);
2255 }
2256 if (len) {
2257 dissect_sna_control(tvb, offset, len, tree, hpr, parse);
2258 pad = (len+3) & 0xfffc;
2259 if (pad > len) {
2260 proto_tree_add_item(tree, hf_sna_padding, tvb, offset+len, pad-len, ENC_NA);
2261 }
2262 offset += pad;
2263 } else {
2264 return;
2265 }
2266 }
2267 }
2268
2269 static void
dissect_control_05(tvbuff_t * tvb,proto_tree * tree)2270 dissect_control_05(tvbuff_t *tvb, proto_tree *tree)
2271 {
2272 if(!tree)
2273 return;
2274
2275 proto_tree_add_item(tree, hf_sna_control_05_delay, tvb, 2, 2, ENC_BIG_ENDIAN);
2276 }
2277
2278 static void
dissect_control_0e(tvbuff_t * tvb,proto_tree * tree)2279 dissect_control_0e(tvbuff_t *tvb, proto_tree *tree)
2280 {
2281 gint len;
2282
2283 if (!tree)
2284 return;
2285
2286 proto_tree_add_item(tree, hf_sna_control_0e_type, tvb, 2, 1, ENC_BIG_ENDIAN);
2287
2288 len = tvb_reported_length_remaining(tvb, 3);
2289 if (len <= 0)
2290 return;
2291
2292 proto_tree_add_item(tree, hf_sna_control_0e_value, tvb, 3, len, ENC_EBCDIC|ENC_NA);
2293 }
2294
2295 static void
dissect_sna_control(tvbuff_t * parent_tvb,int offset,int control_len,proto_tree * tree,int hpr,enum parse parse)2296 dissect_sna_control(tvbuff_t *parent_tvb, int offset, int control_len,
2297 proto_tree *tree, int hpr, enum parse parse)
2298 {
2299 tvbuff_t *tvb;
2300 gint length, reported_length;
2301 proto_tree *sub_tree;
2302 int len, key;
2303 gint ett;
2304
2305 length = tvb_captured_length_remaining(parent_tvb, offset);
2306 reported_length = tvb_reported_length_remaining(parent_tvb, offset);
2307 if (control_len < length)
2308 length = control_len;
2309 if (control_len < reported_length)
2310 reported_length = control_len;
2311 tvb = tvb_new_subset_length_caplen(parent_tvb, offset, length, reported_length);
2312
2313 sub_tree = NULL;
2314
2315 if (parse == LT) {
2316 len = tvb_get_guint8(tvb, 0);
2317 key = tvb_get_guint8(tvb, 1);
2318 } else {
2319 key = tvb_get_guint8(tvb, 0);
2320 len = tvb_get_guint8(tvb, 1);
2321 }
2322 ett = ett_sna_control_un;
2323
2324 if (tree) {
2325 if (key == 5) {
2326 if (hpr) ett = ett_sna_control_05hpr;
2327 else ett = ett_sna_control_05;
2328 }
2329 if (key == 0x0e) ett = ett_sna_control_0e;
2330
2331 if (((key == 0) || (key == 3) || (key == 5)) && hpr)
2332 sub_tree = proto_tree_add_subtree(tree, tvb, 0, -1, ett, NULL,
2333 val_to_str_const(key, sna_control_hpr_vals,
2334 "Unknown Control Vector"));
2335 else
2336 sub_tree = proto_tree_add_subtree(tree, tvb, 0, -1, ett, NULL,
2337 val_to_str_const(key, sna_control_vals,
2338 "Unknown Control Vector"));
2339 if (parse == LT) {
2340 proto_tree_add_uint(sub_tree, hf_sna_control_len,
2341 tvb, 0, 1, len);
2342 if (((key == 0) || (key == 3) || (key == 5)) && hpr)
2343 proto_tree_add_uint(sub_tree,
2344 hf_sna_control_hprkey, tvb, 1, 1, key);
2345 else
2346 proto_tree_add_uint(sub_tree,
2347 hf_sna_control_key, tvb, 1, 1, key);
2348 } else {
2349 if (((key == 0) || (key == 3) || (key == 5)) && hpr)
2350 proto_tree_add_uint(sub_tree,
2351 hf_sna_control_hprkey, tvb, 0, 1, key);
2352 else
2353 proto_tree_add_uint(sub_tree,
2354 hf_sna_control_key, tvb, 0, 1, key);
2355 proto_tree_add_uint(sub_tree, hf_sna_control_len,
2356 tvb, 1, 1, len);
2357 }
2358 }
2359 switch(key) {
2360 case 0x05:
2361 if (hpr)
2362 dissect_control_05hpr(tvb, sub_tree, hpr,
2363 parse);
2364 else
2365 dissect_control_05(tvb, sub_tree);
2366 break;
2367 case 0x0e:
2368 dissect_control_0e(tvb, sub_tree);
2369 break;
2370 }
2371 }
2372
2373 /* --------------------------------------------------------------------
2374 * Chapter 11 Function Management (FM) Headers
2375 * --------------------------------------------------------------------
2376 */
2377
2378 /* --------------------------------------------------------------------
2379 * Chapter 12 Presentation Services (PS) Headers
2380 * --------------------------------------------------------------------
2381 */
2382
2383 /* --------------------------------------------------------------------
2384 * Chapter 13 GDS Variables
2385 * --------------------------------------------------------------------
2386 */
2387
2388 static void
dissect_gds(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,proto_tree * parent_tree)2389 dissect_gds(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
2390 proto_tree *parent_tree)
2391 {
2392 guint16 length;
2393 int cont;
2394 int offset = 0;
2395 proto_item *pi;
2396 proto_tree *subtree;
2397 gboolean first_ll = TRUE;
2398
2399 do {
2400 length = tvb_get_ntohs(tvb, offset) & 0x7fff;
2401 cont = (tvb_get_ntohs(tvb, offset) & 0x8000) ? 1 : 0;
2402
2403 pi = proto_tree_add_item(tree, hf_sna_gds, tvb, offset, -1, ENC_NA);
2404 subtree = proto_item_add_subtree(pi, ett_sna_gds);
2405 proto_tree_add_item(subtree, hf_sna_gds_len, tvb, offset, 2, ENC_BIG_ENDIAN);
2406 proto_tree_add_item(subtree, hf_sna_gds_cont, tvb, offset, 2, ENC_BIG_ENDIAN);
2407 if (length < 2 ) /* escape sequence */
2408 return;
2409 offset += 2;
2410 length -= 2;
2411 if (first_ll) {
2412 proto_tree_add_item(subtree, hf_sna_gds_type, tvb, offset, 2, ENC_BIG_ENDIAN);
2413 offset += 2;
2414 length -= 2;
2415 first_ll = FALSE;
2416 }
2417 if (length > 0) {
2418 proto_tree_add_item(subtree, hf_sna_gds_info, tvb, offset, length, ENC_NA);
2419 offset += length;
2420 }
2421 } while(cont);
2422 proto_item_set_len(pi, offset);
2423 if (tvb_offset_exists(tvb, offset))
2424 call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, parent_tree);
2425 }
2426
2427 /* --------------------------------------------------------------------
2428 * General stuff
2429 * --------------------------------------------------------------------
2430 */
2431
2432 static int
dissect_sna(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)2433 dissect_sna(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
2434 {
2435 guint8 fid;
2436 proto_tree *sna_tree = NULL;
2437 proto_item *sna_ti = NULL;
2438
2439 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SNA");
2440 col_clear(pinfo->cinfo, COL_INFO);
2441
2442 /* SNA data should be printed in EBCDIC, not ASCII */
2443 pinfo->fd->encoding = PACKET_CHAR_ENC_CHAR_EBCDIC;
2444
2445 if (tree) {
2446
2447 /* Don't bother setting length. We'll set it later after we find
2448 * the lengths of TH/RH/RU */
2449 sna_ti = proto_tree_add_item(tree, proto_sna, tvb, 0, -1,
2450 ENC_NA);
2451 sna_tree = proto_item_add_subtree(sna_ti, ett_sna);
2452 }
2453
2454 /* Transmission Header Format Identifier */
2455 fid = hi_nibble(tvb_get_guint8(tvb, 0));
2456 switch(fid) {
2457 case 0xa: /* HPR Network Layer Packet */
2458 case 0xb:
2459 case 0xc:
2460 case 0xd:
2461 dissect_nlp(tvb, pinfo, sna_tree, tree);
2462 break;
2463 default:
2464 dissect_fid(tvb, pinfo, sna_tree, tree);
2465 }
2466 return tvb_captured_length(tvb);
2467 }
2468
2469 static int
dissect_sna_xid(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)2470 dissect_sna_xid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
2471 {
2472 proto_tree *sna_tree = NULL;
2473 proto_item *sna_ti = NULL;
2474
2475 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SNA");
2476 col_clear(pinfo->cinfo, COL_INFO);
2477
2478 /* SNA data should be printed in EBCDIC, not ASCII */
2479 pinfo->fd->encoding = PACKET_CHAR_ENC_CHAR_EBCDIC;
2480
2481 if (tree) {
2482
2483 /* Don't bother setting length. We'll set it later after we find
2484 * the lengths of XID */
2485 sna_ti = proto_tree_add_item(tree, proto_sna_xid, tvb, 0, -1,
2486 ENC_NA);
2487 sna_tree = proto_item_add_subtree(sna_ti, ett_sna);
2488 }
2489 dissect_xid(tvb, pinfo, sna_tree, tree);
2490 return tvb_captured_length(tvb);
2491 }
2492
2493
2494 void
proto_register_sna(void)2495 proto_register_sna(void)
2496 {
2497 static hf_register_info hf[] = {
2498 { &hf_sna_th,
2499 { "Transmission Header", "sna.th", FT_NONE, BASE_NONE,
2500 NULL, 0x0, NULL, HFILL }},
2501
2502 { &hf_sna_th_0,
2503 { "Transmission Header Byte 0", "sna.th.0", FT_UINT8, BASE_HEX,
2504 NULL, 0x0,
2505 "TH Byte 0", HFILL }},
2506
2507 { &hf_sna_th_fid,
2508 { "Format Identifier", "sna.th.fid", FT_UINT8, BASE_HEX,
2509 VALS(sna_th_fid_vals), 0xf0, NULL, HFILL }},
2510
2511 { &hf_sna_th_mpf,
2512 { "Mapping Field", "sna.th.mpf", FT_UINT8,
2513 BASE_DEC, VALS(sna_th_mpf_vals), 0x0c, NULL, HFILL }},
2514
2515 { &hf_sna_th_odai,
2516 { "ODAI Assignment Indicator", "sna.th.odai", FT_UINT8,
2517 BASE_DEC, NULL, 0x02, NULL, HFILL }},
2518
2519 { &hf_sna_th_efi,
2520 { "Expedited Flow Indicator", "sna.th.efi", FT_UINT8,
2521 BASE_DEC, VALS(sna_th_efi_vals), 0x01, NULL, HFILL }},
2522
2523 { &hf_sna_th_daf,
2524 { "Destination Address Field", "sna.th.daf", FT_UINT16,
2525 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2526
2527 { &hf_sna_th_oaf,
2528 { "Origin Address Field", "sna.th.oaf", FT_UINT16, BASE_HEX,
2529 NULL, 0x0, NULL, HFILL }},
2530
2531 { &hf_sna_th_snf,
2532 { "Sequence Number Field", "sna.th.snf", FT_UINT16, BASE_DEC,
2533 NULL, 0x0, NULL, HFILL }},
2534
2535 { &hf_sna_th_dcf,
2536 { "Data Count Field", "sna.th.dcf", FT_UINT16, BASE_DEC,
2537 NULL, 0x0, NULL, HFILL }},
2538
2539 { &hf_sna_th_lsid,
2540 { "Local Session Identification", "sna.th.lsid", FT_UINT8,
2541 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2542
2543 { &hf_sna_th_tg_sweep,
2544 { "Transmission Group Sweep", "sna.th.tg_sweep", FT_UINT8,
2545 BASE_DEC, VALS(sna_th_tg_sweep_vals), 0x08, NULL, HFILL }},
2546
2547 { &hf_sna_th_er_vr_supp_ind,
2548 { "ER and VR Support Indicator", "sna.th.er_vr_supp_ind",
2549 FT_UINT8, BASE_DEC, VALS(sna_th_er_vr_supp_ind_vals),
2550 0x04, NULL, HFILL }},
2551
2552 { &hf_sna_th_vr_pac_cnt_ind,
2553 { "Virtual Route Pacing Count Indicator",
2554 "sna.th.vr_pac_cnt_ind", FT_UINT8, BASE_DEC,
2555 VALS(sna_th_vr_pac_cnt_ind_vals), 0x02, NULL, HFILL }},
2556
2557 { &hf_sna_th_ntwk_prty,
2558 { "Network Priority", "sna.th.ntwk_prty", FT_UINT8, BASE_DEC,
2559 VALS(sna_th_ntwk_prty_vals), 0x01, NULL, HFILL }},
2560
2561 { &hf_sna_th_tgsf,
2562 { "Transmission Group Segmenting Field", "sna.th.tgsf",
2563 FT_UINT8, BASE_HEX, VALS(sna_th_tgsf_vals), 0xc0,
2564 NULL, HFILL }},
2565
2566 { &hf_sna_th_mft,
2567 { "MPR FID4 Type", "sna.th.mft", FT_BOOLEAN, 8,
2568 NULL, 0x04, NULL, HFILL }},
2569
2570 { &hf_sna_th_piubf,
2571 { "PIU Blocking Field", "sna.th.piubf", FT_UINT8, BASE_HEX,
2572 VALS(sna_th_piubf_vals), 0x03, NULL, HFILL }},
2573
2574 { &hf_sna_th_iern,
2575 { "Initial Explicit Route Number", "sna.th.iern", FT_UINT8,
2576 BASE_DEC, NULL, 0xf0, NULL, HFILL }},
2577
2578 { &hf_sna_th_nlpoi,
2579 { "NLP Offset Indicator", "sna.th.nlpoi", FT_UINT8, BASE_DEC,
2580 VALS(sna_th_nlpoi_vals), 0x80, NULL, HFILL }},
2581
2582 { &hf_sna_th_nlp_cp,
2583 { "NLP Count or Padding", "sna.th.nlp_cp", FT_UINT8, BASE_DEC,
2584 NULL, 0x70, NULL, HFILL }},
2585
2586 { &hf_sna_th_ern,
2587 { "Explicit Route Number", "sna.th.ern", FT_UINT8, BASE_DEC,
2588 NULL, 0x0f, NULL, HFILL }},
2589
2590 { &hf_sna_th_vrn,
2591 { "Virtual Route Number", "sna.th.vrn", FT_UINT8, BASE_DEC,
2592 NULL, 0xf0, NULL, HFILL }},
2593
2594 { &hf_sna_th_tpf,
2595 { "Transmission Priority Field", "sna.th.tpf", FT_UINT8,
2596 BASE_HEX, VALS(sna_th_tpf_vals), 0x03, NULL, HFILL }},
2597
2598 { &hf_sna_th_vr_cwi,
2599 { "Virtual Route Change Window Indicator", "sna.th.vr_cwi",
2600 FT_UINT16, BASE_DEC, VALS(sna_th_vr_cwi_vals), 0x8000,
2601 "Change Window Indicator", HFILL }},
2602
2603 { &hf_sna_th_tg_nonfifo_ind,
2604 { "Transmission Group Non-FIFO Indicator",
2605 "sna.th.tg_nonfifo_ind", FT_BOOLEAN, 16,
2606 TFS(&sna_th_tg_nonfifo_ind_truth), 0x4000, NULL, HFILL }},
2607
2608 { &hf_sna_th_vr_sqti,
2609 { "Virtual Route Sequence and Type Indicator", "sna.th.vr_sqti",
2610 FT_UINT16, BASE_HEX, VALS(sna_th_vr_sqti_vals), 0x3000,
2611 "Route Sequence and Type", HFILL }},
2612
2613 { &hf_sna_th_tg_snf,
2614 { "Transmission Group Sequence Number Field", "sna.th.tg_snf",
2615 FT_UINT16, BASE_DEC, NULL, 0x0fff, NULL, HFILL }},
2616
2617 { &hf_sna_th_vrprq,
2618 { "Virtual Route Pacing Request", "sna.th.vrprq", FT_BOOLEAN,
2619 16, TFS(&sna_th_vrprq_truth), 0x8000, NULL, HFILL }},
2620
2621 { &hf_sna_th_vrprs,
2622 { "Virtual Route Pacing Response", "sna.th.vrprs", FT_BOOLEAN,
2623 16, TFS(&sna_th_vrprs_truth), 0x4000, NULL, HFILL }},
2624
2625 { &hf_sna_th_vr_cwri,
2626 { "Virtual Route Change Window Reply Indicator",
2627 "sna.th.vr_cwri", FT_UINT16, BASE_DEC,
2628 VALS(sna_th_vr_cwri_vals), 0x2000, NULL, HFILL }},
2629
2630 { &hf_sna_th_vr_rwi,
2631 { "Virtual Route Reset Window Indicator", "sna.th.vr_rwi",
2632 FT_BOOLEAN, 16, TFS(&sna_th_vr_rwi_truth), 0x1000,
2633 NULL, HFILL }},
2634
2635 { &hf_sna_th_vr_snf_send,
2636 { "Virtual Route Send Sequence Number Field",
2637 "sna.th.vr_snf_send", FT_UINT16, BASE_DEC, NULL, 0x0fff,
2638 "Send Sequence Number Field", HFILL }},
2639
2640 { &hf_sna_th_dsaf,
2641 { "Destination Subarea Address Field", "sna.th.dsaf",
2642 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2643
2644 { &hf_sna_th_osaf,
2645 { "Origin Subarea Address Field", "sna.th.osaf", FT_UINT32,
2646 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2647
2648 { &hf_sna_th_snai,
2649 { "SNA Indicator", "sna.th.snai", FT_BOOLEAN, 8, NULL, 0x10,
2650 "Used to identify whether the PIU originated or is destined for an SNA or non-SNA device.", HFILL }},
2651
2652 { &hf_sna_th_def,
2653 { "Destination Element Field", "sna.th.def", FT_UINT16,
2654 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2655
2656 { &hf_sna_th_oef,
2657 { "Origin Element Field", "sna.th.oef", FT_UINT16, BASE_HEX,
2658 NULL, 0x0, NULL, HFILL }},
2659
2660 { &hf_sna_th_sa,
2661 { "Session Address", "sna.th.sa", FT_BYTES, BASE_NONE,
2662 NULL, 0x0, NULL, HFILL }},
2663
2664 { &hf_sna_th_cmd_fmt,
2665 { "Command Format", "sna.th.cmd_fmt", FT_UINT8, BASE_HEX,
2666 NULL, 0x0, NULL, HFILL }},
2667
2668 { &hf_sna_th_cmd_type,
2669 { "Command Type", "sna.th.cmd_type", FT_UINT8, BASE_HEX,
2670 NULL, 0x0, NULL, HFILL }},
2671
2672 { &hf_sna_th_cmd_sn,
2673 { "Command Sequence Number", "sna.th.cmd_sn", FT_UINT16,
2674 BASE_DEC, NULL, 0x0, NULL, HFILL }},
2675
2676 { &hf_sna_th_byte1,
2677 { "Transmission Header Bytes 1", "sna.th.byte1", FT_UINT8,
2678 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2679
2680 { &hf_sna_th_byte2,
2681 { "Transmission Header Bytes 2", "sna.th.byte2", FT_UINT8,
2682 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2683
2684 { &hf_sna_th_byte3,
2685 { "Transmission Header Bytes 3", "sna.th.byte3", FT_UINT8,
2686 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2687
2688 { &hf_sna_th_byte4,
2689 { "Transmission Header Bytes 4-5", "sna.th.byte4", FT_UINT16,
2690 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2691
2692 { &hf_sna_th_byte6,
2693 { "Transmission Header Bytes 6-7", "sna.th.byte6", FT_UINT16,
2694 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2695
2696 { &hf_sna_th_byte16,
2697 { "Transmission Header Bytes 16", "sna.th.byte16", FT_UINT8,
2698 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2699
2700 { &hf_sna_nlp_nhdr,
2701 { "Network Layer Packet Header", "sna.nlp.nhdr", FT_NONE,
2702 BASE_NONE, NULL, 0x0, "NHDR", HFILL }},
2703
2704 { &hf_sna_nlp_nhdr_0,
2705 { "Network Layer Packet Header Byte 0", "sna.nlp.nhdr.0",
2706 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2707
2708 { &hf_sna_nlp_nhdr_1,
2709 { "Network Layer Packet Header Byte 1", "sna.nlp.nhdr.1",
2710 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2711
2712 { &hf_sna_nlp_sm,
2713 { "Switching Mode Field", "sna.nlp.nhdr.sm", FT_UINT8,
2714 BASE_HEX, VALS(sna_nlp_sm_vals), 0xe0, NULL, HFILL }},
2715
2716 { &hf_sna_nlp_tpf,
2717 { "Transmission Priority Field", "sna.nlp.nhdr.tpf", FT_UINT8,
2718 BASE_HEX, VALS(sna_th_tpf_vals), 0x06, NULL, HFILL }},
2719
2720 { &hf_sna_nlp_ft,
2721 { "Function Type", "sna.nlp.nhdr.ft", FT_UINT8, BASE_HEX,
2722 VALS(sna_nlp_ft_vals), 0xF0, NULL, HFILL }},
2723
2724 { &hf_sna_nlp_tspi,
2725 { "Time Sensitive Packet Indicator", "sna.nlp.nhdr.tspi",
2726 FT_BOOLEAN, 8, TFS(&sna_nlp_tspi_truth), 0x08, NULL, HFILL }},
2727
2728 { &hf_sna_nlp_slowdn1,
2729 { "Slowdown 1", "sna.nlp.nhdr.slowdn1", FT_BOOLEAN, 8,
2730 TFS(&sna_nlp_slowdn1_truth), 0x04, NULL, HFILL }},
2731
2732 { &hf_sna_nlp_slowdn2,
2733 { "Slowdown 2", "sna.nlp.nhdr.slowdn2", FT_BOOLEAN, 8,
2734 TFS(&sna_nlp_slowdn2_truth), 0x02, NULL, HFILL }},
2735
2736 { &hf_sna_nlp_fra,
2737 { "Function Routing Address Entry", "sna.nlp.nhdr.fra",
2738 FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
2739
2740 { &hf_sna_nlp_anr,
2741 { "Automatic Network Routing Entry", "sna.nlp.nhdr.anr",
2742 FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
2743
2744 { &hf_sna_nlp_frh,
2745 { "Transmission Priority Field", "sna.nlp.frh", FT_UINT8,
2746 BASE_HEX, VALS(sna_nlp_frh_vals), 0, NULL, HFILL }},
2747
2748 { &hf_sna_nlp_thdr,
2749 { "RTP Transport Header", "sna.nlp.thdr", FT_NONE, BASE_NONE,
2750 NULL, 0x0, "THDR", HFILL }},
2751
2752 { &hf_sna_nlp_tcid,
2753 { "Transport Connection Identifier", "sna.nlp.thdr.tcid",
2754 FT_BYTES, BASE_NONE, NULL, 0x0, "TCID", HFILL }},
2755
2756 { &hf_sna_nlp_thdr_8,
2757 { "RTP Transport Packet Header Byte 8", "sna.nlp.thdr.8",
2758 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2759
2760 { &hf_sna_nlp_setupi,
2761 { "Setup Indicator", "sna.nlp.thdr.setupi", FT_BOOLEAN, 8,
2762 TFS(&sna_nlp_setupi_truth), 0x40, NULL, HFILL }},
2763
2764 { &hf_sna_nlp_somi,
2765 { "Start Of Message Indicator", "sna.nlp.thdr.somi",
2766 FT_BOOLEAN, 8, TFS(&sna_nlp_somi_truth), 0x20, NULL, HFILL }},
2767
2768 { &hf_sna_nlp_eomi,
2769 { "End Of Message Indicator", "sna.nlp.thdr.eomi", FT_BOOLEAN,
2770 8, TFS(&sna_nlp_eomi_truth), 0x10, NULL, HFILL }},
2771
2772 { &hf_sna_nlp_sri,
2773 { "Session Request Indicator", "sna.nlp.thdr.sri", FT_BOOLEAN,
2774 8, TFS(&sna_nlp_sri_truth), 0x08, NULL, HFILL }},
2775
2776 { &hf_sna_nlp_rasapi,
2777 { "Reply ASAP Indicator", "sna.nlp.thdr.rasapi", FT_BOOLEAN,
2778 8, TFS(&sna_nlp_rasapi_truth), 0x04, NULL, HFILL }},
2779
2780 { &hf_sna_nlp_retryi,
2781 { "Retry Indicator", "sna.nlp.thdr.retryi", FT_BOOLEAN,
2782 8, TFS(&sna_nlp_retryi_truth), 0x02, NULL, HFILL }},
2783
2784 { &hf_sna_nlp_thdr_9,
2785 { "RTP Transport Packet Header Byte 9", "sna.nlp.thdr.9",
2786 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2787
2788 { &hf_sna_nlp_lmi,
2789 { "Last Message Indicator", "sna.nlp.thdr.lmi", FT_BOOLEAN,
2790 8, TFS(&sna_nlp_lmi_truth), 0x80, NULL, HFILL }},
2791
2792 { &hf_sna_nlp_cqfi,
2793 { "Connection Qualifier Field Indicator", "sna.nlp.thdr.cqfi",
2794 FT_BOOLEAN, 8, TFS(&sna_nlp_cqfi_truth), 0x08, NULL, HFILL }},
2795
2796 { &hf_sna_nlp_osi,
2797 { "Optional Segments Present Indicator", "sna.nlp.thdr.osi",
2798 FT_BOOLEAN, 8, TFS(&sna_nlp_osi_truth), 0x04, NULL, HFILL }},
2799
2800 { &hf_sna_nlp_offset,
2801 { "Data Offset/4", "sna.nlp.thdr.offset", FT_UINT16, BASE_HEX,
2802 NULL, 0x0, "Data Offset in Words", HFILL }},
2803
2804 { &hf_sna_nlp_dlf,
2805 { "Data Length Field", "sna.nlp.thdr.dlf", FT_UINT32, BASE_HEX,
2806 NULL, 0x0, NULL, HFILL }},
2807
2808 { &hf_sna_nlp_bsn,
2809 { "Byte Sequence Number", "sna.nlp.thdr.bsn", FT_UINT32,
2810 BASE_HEX, NULL, 0x0, NULL, HFILL }},
2811
2812 { &hf_sna_nlp_opti_len,
2813 { "Optional Segment Length/4", "sna.nlp.thdr.optional.len",
2814 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2815
2816 { &hf_sna_nlp_opti_type,
2817 { "Optional Segment Type", "sna.nlp.thdr.optional.type",
2818 FT_UINT8, BASE_HEX, VALS(sna_nlp_opti_vals), 0x0, NULL,
2819 HFILL }},
2820
2821 { &hf_sna_nlp_opti_0d_version,
2822 { "Version", "sna.nlp.thdr.optional.0d.version",
2823 FT_UINT16, BASE_HEX, VALS(sna_nlp_opti_0d_version_vals),
2824 0, NULL, HFILL }},
2825
2826 { &hf_sna_nlp_opti_0d_4,
2827 { "Connection Setup Byte 4", "sna.nlp.thdr.optional.0e.4",
2828 FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL }},
2829
2830 { &hf_sna_nlp_opti_0d_target,
2831 { "Target Resource ID Present",
2832 "sna.nlp.thdr.optional.0d.target",
2833 FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
2834
2835 { &hf_sna_nlp_opti_0d_arb,
2836 { "ARB Flow Control", "sna.nlp.thdr.optional.0d.arb",
2837 FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
2838
2839 { &hf_sna_nlp_opti_0d_reliable,
2840 { "Reliable Connection", "sna.nlp.thdr.optional.0d.reliable",
2841 FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
2842
2843 { &hf_sna_nlp_opti_0d_dedicated,
2844 { "Dedicated RTP Connection",
2845 "sna.nlp.thdr.optional.0d.dedicated",
2846 FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
2847
2848 { &hf_sna_nlp_opti_0e_stat,
2849 { "Status", "sna.nlp.thdr.optional.0e.stat",
2850 FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL }},
2851
2852 { &hf_sna_nlp_opti_0e_gap,
2853 { "Gap Detected", "sna.nlp.thdr.optional.0e.gap",
2854 FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
2855
2856 { &hf_sna_nlp_opti_0e_idle,
2857 { "RTP Idle Packet", "sna.nlp.thdr.optional.0e.idle",
2858 FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
2859
2860 { &hf_sna_nlp_opti_0e_nabsp,
2861 { "Number Of ABSP", "sna.nlp.thdr.optional.0e.nabsp",
2862 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2863
2864 { &hf_sna_nlp_opti_0e_sync,
2865 { "Status Report Number", "sna.nlp.thdr.optional.0e.sync",
2866 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2867
2868 { &hf_sna_nlp_opti_0e_echo,
2869 { "Status Acknowledge Number", "sna.nlp.thdr.optional.0e.echo",
2870 FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2871
2872 { &hf_sna_nlp_opti_0e_rseq,
2873 { "Received Sequence Number", "sna.nlp.thdr.optional.0e.rseq",
2874 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2875
2876 #if 0
2877 { &hf_sna_nlp_opti_0e_abspbeg,
2878 { "ABSP Begin", "sna.nlp.thdr.optional.0e.abspbeg",
2879 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2880 #endif
2881
2882 #if 0
2883 { &hf_sna_nlp_opti_0e_abspend,
2884 { "ABSP End", "sna.nlp.thdr.optional.0e.abspend",
2885 FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2886 #endif
2887
2888 { &hf_sna_nlp_opti_0f_bits,
2889 { "Client Bits", "sna.nlp.thdr.optional.0f.bits",
2890 FT_UINT8, BASE_HEX, VALS(sna_nlp_opti_0f_bits_vals),
2891 0x0, NULL, HFILL }},
2892
2893 { &hf_sna_nlp_opti_10_tcid,
2894 { "Transport Connection Identifier",
2895 "sna.nlp.thdr.optional.10.tcid",
2896 FT_BYTES, BASE_NONE, NULL, 0x0, "TCID", HFILL }},
2897
2898 { &hf_sna_nlp_opti_12_sense,
2899 { "Sense Data", "sna.nlp.thdr.optional.12.sense",
2900 FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2901
2902 { &hf_sna_nlp_opti_14_si_len,
2903 { "Length", "sna.nlp.thdr.optional.14.si.len",
2904 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2905
2906 { &hf_sna_nlp_opti_14_si_key,
2907 { "Key", "sna.nlp.thdr.optional.14.si.key",
2908 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2909
2910 { &hf_sna_nlp_opti_14_si_2,
2911 { "Switching Information Byte 2",
2912 "sna.nlp.thdr.optional.14.si.2",
2913 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2914
2915 { &hf_sna_nlp_opti_14_si_refifo,
2916 { "Resequencing (REFIFO) Indicator",
2917 "sna.nlp.thdr.optional.14.si.refifo",
2918 FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
2919
2920 { &hf_sna_nlp_opti_14_si_mobility,
2921 { "Mobility Indicator",
2922 "sna.nlp.thdr.optional.14.si.mobility",
2923 FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
2924
2925 { &hf_sna_nlp_opti_14_si_dirsearch,
2926 { "Directory Search Required on Path Switch Indicator",
2927 "sna.nlp.thdr.optional.14.si.dirsearch",
2928 FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL }},
2929
2930 { &hf_sna_nlp_opti_14_si_limitres,
2931 { "Limited Resource Link Indicator",
2932 "sna.nlp.thdr.optional.14.si.limitres",
2933 FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL }},
2934
2935 { &hf_sna_nlp_opti_14_si_ncescope,
2936 { "NCE Scope Indicator",
2937 "sna.nlp.thdr.optional.14.si.ncescope",
2938 FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL }},
2939
2940 { &hf_sna_nlp_opti_14_si_mnpsrscv,
2941 { "MNPS RSCV Retention Indicator",
2942 "sna.nlp.thdr.optional.14.si.mnpsrscv",
2943 FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
2944
2945 { &hf_sna_nlp_opti_14_si_maxpsize,
2946 { "Maximum Packet Size On Return Path",
2947 "sna.nlp.thdr.optional.14.si.maxpsize",
2948 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2949
2950 { &hf_sna_nlp_opti_14_si_switch,
2951 { "Path Switch Time", "sna.nlp.thdr.optional.14.si.switch",
2952 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2953
2954 { &hf_sna_nlp_opti_14_si_alive,
2955 { "RTP Alive Timer", "sna.nlp.thdr.optional.14.si.alive",
2956 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2957
2958 { &hf_sna_nlp_opti_14_rr_len,
2959 { "Length", "sna.nlp.thdr.optional.14.rr.len",
2960 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2961
2962 { &hf_sna_nlp_opti_14_rr_key,
2963 { "Key", "sna.nlp.thdr.optional.14.rr.key",
2964 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2965
2966 { &hf_sna_nlp_opti_14_rr_2,
2967 { "Return Route TG Descriptor Byte 2",
2968 "sna.nlp.thdr.optional.14.rr.2",
2969 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2970
2971 { &hf_sna_nlp_opti_14_rr_bfe,
2972 { "BF Entry Indicator",
2973 "sna.nlp.thdr.optional.14.rr.bfe",
2974 FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
2975
2976 { &hf_sna_nlp_opti_14_rr_num,
2977 { "Number Of TG Control Vectors",
2978 "sna.nlp.thdr.optional.14.rr.num",
2979 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2980
2981 { &hf_sna_nlp_opti_22_2,
2982 { "Adaptive Rate Based Segment Byte 2",
2983 "sna.nlp.thdr.optional.22.2",
2984 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
2985
2986 { &hf_sna_nlp_opti_22_type,
2987 { "Message Type",
2988 "sna.nlp.thdr.optional.22.type",
2989 FT_UINT8, BASE_HEX,
2990 VALS(sna_nlp_opti_22_type_vals), 0xc0, NULL, HFILL }},
2991
2992 { &hf_sna_nlp_opti_22_raa,
2993 { "Rate Adjustment Action",
2994 "sna.nlp.thdr.optional.22.raa",
2995 FT_UINT8, BASE_HEX,
2996 VALS(sna_nlp_opti_22_raa_vals), 0x38, NULL, HFILL }},
2997
2998 { &hf_sna_nlp_opti_22_parity,
2999 { "Parity Indicator",
3000 "sna.nlp.thdr.optional.22.parity",
3001 FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL }},
3002
3003 { &hf_sna_nlp_opti_22_arb,
3004 { "ARB Mode",
3005 "sna.nlp.thdr.optional.22.arb",
3006 FT_UINT8, BASE_HEX,
3007 VALS(sna_nlp_opti_22_arb_vals), 0x03, NULL, HFILL }},
3008
3009 { &hf_sna_nlp_opti_22_3,
3010 { "Adaptive Rate Based Segment Byte 3",
3011 "sna.nlp.thdr.optional.22.3",
3012 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
3013
3014 { &hf_sna_nlp_opti_22_ratereq,
3015 { "Rate Request Correlator",
3016 "sna.nlp.thdr.optional.22.ratereq",
3017 FT_UINT8, BASE_DEC, NULL, 0xf0, NULL, HFILL }},
3018
3019 { &hf_sna_nlp_opti_22_raterep,
3020 { "Rate Reply Correlator",
3021 "sna.nlp.thdr.optional.22.raterep",
3022 FT_UINT8, BASE_DEC, NULL, 0x0f, NULL, HFILL }},
3023
3024 { &hf_sna_nlp_opti_22_field1,
3025 { "Field 1", "sna.nlp.thdr.optional.22.field1",
3026 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
3027
3028 { &hf_sna_nlp_opti_22_field2,
3029 { "Field 2", "sna.nlp.thdr.optional.22.field2",
3030 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
3031
3032 { &hf_sna_nlp_opti_22_field3,
3033 { "Field 3", "sna.nlp.thdr.optional.22.field3",
3034 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
3035
3036 { &hf_sna_nlp_opti_22_field4,
3037 { "Field 4", "sna.nlp.thdr.optional.22.field4",
3038 FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
3039
3040 { &hf_sna_rh,
3041 { "Request/Response Header", "sna.rh", FT_NONE, BASE_NONE,
3042 NULL, 0x0, NULL, HFILL }},
3043
3044 { &hf_sna_rh_0,
3045 { "Request/Response Header Byte 0", "sna.rh.0", FT_UINT8,
3046 BASE_HEX, NULL, 0x0, NULL, HFILL }},
3047
3048 { &hf_sna_rh_1,
3049 { "Request/Response Header Byte 1", "sna.rh.1", FT_UINT8,
3050 BASE_HEX, NULL, 0x0, NULL, HFILL }},
3051
3052 { &hf_sna_rh_2,
3053 { "Request/Response Header Byte 2", "sna.rh.2", FT_UINT8,
3054 BASE_HEX, NULL, 0x0, NULL, HFILL }},
3055
3056 { &hf_sna_rh_rri,
3057 { "Request/Response Indicator", "sna.rh.rri", FT_UINT8,
3058 BASE_DEC, VALS(sna_rh_rri_vals), 0x80, NULL, HFILL }},
3059
3060 { &hf_sna_rh_ru_category,
3061 { "Request/Response Unit Category", "sna.rh.ru_category",
3062 FT_UINT8, BASE_HEX, VALS(sna_rh_ru_category_vals), 0x60,
3063 NULL, HFILL }},
3064
3065 { &hf_sna_rh_fi,
3066 { "Format Indicator", "sna.rh.fi", FT_BOOLEAN, 8,
3067 TFS(&sna_rh_fi_truth), 0x08, NULL, HFILL }},
3068
3069 { &hf_sna_rh_sdi,
3070 { "Sense Data Included", "sna.rh.sdi", FT_BOOLEAN, 8,
3071 TFS(&tfs_included_not_included), 0x04, NULL, HFILL }},
3072
3073 { &hf_sna_rh_bci,
3074 { "Begin Chain Indicator", "sna.rh.bci", FT_BOOLEAN, 8,
3075 TFS(&sna_rh_bci_truth), 0x02, NULL, HFILL }},
3076
3077 { &hf_sna_rh_eci,
3078 { "End Chain Indicator", "sna.rh.eci", FT_BOOLEAN, 8,
3079 TFS(&sna_rh_eci_truth), 0x01, NULL, HFILL }},
3080
3081 { &hf_sna_rh_dr1,
3082 { "Definite Response 1 Indicator", "sna.rh.dr1", FT_BOOLEAN,
3083 8, NULL, 0x80, NULL, HFILL }},
3084
3085 { &hf_sna_rh_lcci,
3086 { "Length-Checked Compression Indicator", "sna.rh.lcci",
3087 FT_BOOLEAN, 8, TFS(&sna_rh_lcci_truth), 0x40, NULL, HFILL }},
3088
3089 { &hf_sna_rh_dr2,
3090 { "Definite Response 2 Indicator", "sna.rh.dr2", FT_BOOLEAN,
3091 8, NULL, 0x20, NULL, HFILL }},
3092
3093 { &hf_sna_rh_eri,
3094 { "Exception Response Indicator", "sna.rh.eri", FT_BOOLEAN,
3095 8, NULL, 0x10, NULL, HFILL }},
3096
3097 { &hf_sna_rh_rti,
3098 { "Response Type Indicator", "sna.rh.rti", FT_BOOLEAN,
3099 8, TFS(&sna_rh_rti_truth), 0x10, NULL, HFILL }},
3100
3101 { &hf_sna_rh_rlwi,
3102 { "Request Larger Window Indicator", "sna.rh.rlwi", FT_BOOLEAN,
3103 8, NULL, 0x04, NULL, HFILL }},
3104
3105 { &hf_sna_rh_qri,
3106 { "Queued Response Indicator", "sna.rh.qri", FT_BOOLEAN,
3107 8, TFS(&sna_rh_qri_truth), 0x02, NULL, HFILL }},
3108
3109 { &hf_sna_rh_pi,
3110 { "Pacing Indicator", "sna.rh.pi", FT_BOOLEAN,
3111 8, NULL, 0x01, NULL, HFILL }},
3112
3113 { &hf_sna_rh_bbi,
3114 { "Begin Bracket Indicator", "sna.rh.bbi", FT_BOOLEAN,
3115 8, NULL, 0x80, NULL, HFILL }},
3116
3117 { &hf_sna_rh_ebi,
3118 { "End Bracket Indicator", "sna.rh.ebi", FT_BOOLEAN,
3119 8, NULL, 0x40, NULL, HFILL }},
3120
3121 { &hf_sna_rh_cdi,
3122 { "Change Direction Indicator", "sna.rh.cdi", FT_BOOLEAN,
3123 8, NULL, 0x20, NULL, HFILL }},
3124
3125 { &hf_sna_rh_csi,
3126 { "Code Selection Indicator", "sna.rh.csi", FT_UINT8, BASE_DEC,
3127 VALS(sna_rh_csi_vals), 0x08, NULL, HFILL }},
3128
3129 { &hf_sna_rh_edi,
3130 { "Enciphered Data Indicator", "sna.rh.edi", FT_BOOLEAN, 8,
3131 NULL, 0x04, NULL, HFILL }},
3132
3133 { &hf_sna_rh_pdi,
3134 { "Padded Data Indicator", "sna.rh.pdi", FT_BOOLEAN, 8, NULL,
3135 0x02, NULL, HFILL }},
3136
3137 { &hf_sna_rh_cebi,
3138 { "Conditional End Bracket Indicator", "sna.rh.cebi",
3139 FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL }},
3140
3141 /* { &hf_sna_ru,
3142 { "Request/Response Unit", "sna.ru", FT_NONE, BASE_NONE,
3143 NULL, 0x0, NULL, HFILL }},*/
3144
3145 { &hf_sna_gds,
3146 { "GDS Variable", "sna.gds", FT_NONE, BASE_NONE, NULL, 0x0,
3147 NULL, HFILL }},
3148
3149 { &hf_sna_gds_len,
3150 { "GDS Variable Length", "sna.gds.len", FT_UINT16, BASE_DEC,
3151 NULL, 0x7fff, NULL, HFILL }},
3152
3153 { &hf_sna_gds_cont,
3154 { "Continuation Flag", "sna.gds.cont", FT_BOOLEAN, 16, NULL,
3155 0x8000, NULL, HFILL }},
3156
3157 { &hf_sna_gds_type,
3158 { "Type of Variable", "sna.gds.type", FT_UINT16, BASE_HEX,
3159 VALS(sna_gds_var_vals), 0x0, NULL, HFILL }},
3160
3161 { &hf_sna_gds_info,
3162 { "Information", "sna.gds.info", FT_BYTES, BASE_NONE,
3163 NULL, 0x0, NULL, HFILL }},
3164
3165 #if 0
3166 { &hf_sna_xid,
3167 { "XID", "sna.xid", FT_NONE, BASE_NONE, NULL, 0x0,
3168 "XID Frame", HFILL }},
3169 #endif
3170
3171 { &hf_sna_xid_0,
3172 { "XID Byte 0", "sna.xid.0", FT_UINT8, BASE_HEX, NULL, 0x0,
3173 NULL, HFILL }},
3174
3175 { &hf_sna_xid_format,
3176 { "XID Format", "sna.xid.format", FT_UINT8, BASE_DEC, NULL,
3177 0xf0, NULL, HFILL }},
3178
3179 { &hf_sna_xid_type,
3180 { "XID Type", "sna.xid.type", FT_UINT8, BASE_DEC,
3181 VALS(sna_xid_type_vals), 0x0f, NULL, HFILL }},
3182
3183 { &hf_sna_xid_len,
3184 { "XID Length", "sna.xid.len", FT_UINT8, BASE_DEC, NULL, 0x0,
3185 NULL, HFILL }},
3186
3187 { &hf_sna_xid_id,
3188 { "Node Identification", "sna.xid.id", FT_UINT32, BASE_HEX,
3189 NULL, 0x0, NULL, HFILL }},
3190
3191 { &hf_sna_xid_idblock,
3192 { "ID Block", "sna.xid.idblock", FT_UINT32, BASE_HEX, NULL,
3193 0xfff00000, NULL, HFILL }},
3194
3195 { &hf_sna_xid_idnum,
3196 { "ID Number", "sna.xid.idnum", FT_UINT32, BASE_HEX, NULL,
3197 0x0fffff, NULL, HFILL }},
3198
3199 { &hf_sna_xid_3_8,
3200 { "Characteristics of XID sender", "sna.xid.type3.8", FT_UINT16,
3201 BASE_HEX, NULL, 0x0, NULL, HFILL }},
3202
3203 { &hf_sna_xid_3_init_self,
3204 { "INIT-SELF support", "sna.xid.type3.initself",
3205 FT_BOOLEAN, 16, NULL, 0x8000, NULL, HFILL }},
3206
3207 { &hf_sna_xid_3_stand_bind,
3208 { "Stand-Alone BIND Support", "sna.xid.type3.stand_bind",
3209 FT_BOOLEAN, 16, NULL, 0x4000, NULL, HFILL }},
3210
3211 { &hf_sna_xid_3_gener_bind,
3212 { "Whole BIND PIU generated indicator",
3213 "sna.xid.type3.gener_bind", FT_BOOLEAN, 16, NULL, 0x2000,
3214 "Whole BIND PIU generated", HFILL }},
3215
3216 { &hf_sna_xid_3_recve_bind,
3217 { "Whole BIND PIU required indicator",
3218 "sna.xid.type3.recve_bind", FT_BOOLEAN, 16, NULL, 0x1000,
3219 "Whole BIND PIU required", HFILL }},
3220
3221 { &hf_sna_xid_3_actpu,
3222 { "ACTPU suppression indicator", "sna.xid.type3.actpu",
3223 FT_BOOLEAN, 16, NULL, 0x0080, NULL, HFILL }},
3224
3225 { &hf_sna_xid_3_nwnode,
3226 { "Sender is network node", "sna.xid.type3.nwnode",
3227 FT_BOOLEAN, 16, NULL, 0x0040, NULL, HFILL }},
3228
3229 { &hf_sna_xid_3_cp,
3230 { "Control Point Services", "sna.xid.type3.cp",
3231 FT_BOOLEAN, 16, NULL, 0x0020, NULL, HFILL }},
3232
3233 { &hf_sna_xid_3_cpcp,
3234 { "CP-CP session support", "sna.xid.type3.cpcp",
3235 FT_BOOLEAN, 16, NULL, 0x0010, NULL, HFILL }},
3236
3237 { &hf_sna_xid_3_state,
3238 { "XID exchange state indicator", "sna.xid.type3.state",
3239 FT_UINT16, BASE_HEX, VALS(sna_xid_3_state_vals),
3240 0x000c, NULL, HFILL }},
3241
3242 { &hf_sna_xid_3_nonact,
3243 { "Nonactivation Exchange", "sna.xid.type3.nonact",
3244 FT_BOOLEAN, 16, NULL, 0x0002, NULL, HFILL }},
3245
3246 { &hf_sna_xid_3_cpchange,
3247 { "CP name change support", "sna.xid.type3.cpchange",
3248 FT_BOOLEAN, 16, NULL, 0x0001, NULL, HFILL }},
3249
3250 { &hf_sna_xid_3_10,
3251 { "XID Type 3 Byte 10", "sna.xid.type3.10", FT_UINT8, BASE_HEX,
3252 NULL, 0x0, NULL, HFILL }},
3253
3254 { &hf_sna_xid_3_asend_bind,
3255 { "Adaptive BIND pacing support as sender",
3256 "sna.xid.type3.asend_bind", FT_BOOLEAN, 8, NULL, 0x80,
3257 "Pacing support as sender", HFILL }},
3258
3259 { &hf_sna_xid_3_arecv_bind,
3260 { "Adaptive BIND pacing support as receiver",
3261 "sna.xid.type3.asend_recv", FT_BOOLEAN, 8, NULL, 0x40,
3262 "Pacing support as receive", HFILL }},
3263
3264 { &hf_sna_xid_3_quiesce,
3265 { "Quiesce TG Request",
3266 "sna.xid.type3.quiesce", FT_BOOLEAN, 8, NULL, 0x20,
3267 NULL, HFILL }},
3268
3269 { &hf_sna_xid_3_pucap,
3270 { "PU Capabilities",
3271 "sna.xid.type3.pucap", FT_BOOLEAN, 8, NULL, 0x10,
3272 NULL, HFILL }},
3273
3274 { &hf_sna_xid_3_pbn,
3275 { "Peripheral Border Node",
3276 "sna.xid.type3.pbn", FT_BOOLEAN, 8, NULL, 0x08,
3277 NULL, HFILL }},
3278
3279 { &hf_sna_xid_3_pacing,
3280 { "Qualifier for adaptive BIND pacing support",
3281 "sna.xid.type3.pacing", FT_UINT8, BASE_HEX, NULL, 0x03,
3282 NULL, HFILL }},
3283
3284 { &hf_sna_xid_3_11,
3285 { "XID Type 3 Byte 11", "sna.xid.type3.11", FT_UINT8, BASE_HEX,
3286 NULL, 0x0, NULL, HFILL }},
3287
3288 { &hf_sna_xid_3_tgshare,
3289 { "TG Sharing Prohibited Indicator",
3290 "sna.xid.type3.tgshare", FT_BOOLEAN, 8, NULL, 0x40,
3291 NULL, HFILL }},
3292
3293 { &hf_sna_xid_3_dedsvc,
3294 { "Dedicated SVC Indicator",
3295 "sna.xid.type3.dedsvc", FT_BOOLEAN, 8, NULL, 0x20,
3296 NULL, HFILL }},
3297
3298 { &hf_sna_xid_3_12,
3299 { "XID Type 3 Byte 12", "sna.xid.type3.12", FT_UINT8, BASE_HEX,
3300 NULL, 0x0, NULL, HFILL }},
3301
3302 { &hf_sna_xid_3_negcsup,
3303 { "Negotiation Complete Supported",
3304 "sna.xid.type3.negcsup", FT_BOOLEAN, 8, NULL, 0x80,
3305 NULL, HFILL }},
3306
3307 { &hf_sna_xid_3_negcomp,
3308 { "Negotiation Complete",
3309 "sna.xid.type3.negcomp", FT_BOOLEAN, 8, NULL, 0x40,
3310 NULL, HFILL }},
3311
3312 { &hf_sna_xid_3_15,
3313 { "XID Type 3 Byte 15", "sna.xid.type3.15", FT_UINT8, BASE_HEX,
3314 NULL, 0x0, NULL, HFILL }},
3315
3316 { &hf_sna_xid_3_partg,
3317 { "Parallel TG Support",
3318 "sna.xid.type3.partg", FT_BOOLEAN, 8, NULL, 0x80,
3319 NULL, HFILL }},
3320
3321 { &hf_sna_xid_3_dlur,
3322 { "Dependent LU Requester Indicator",
3323 "sna.xid.type3.dlur", FT_BOOLEAN, 8, NULL, 0x40,
3324 NULL, HFILL }},
3325
3326 { &hf_sna_xid_3_dlus,
3327 { "DLUS Served LU Registration Indicator",
3328 "sna.xid.type3.dlus", FT_BOOLEAN, 8, NULL, 0x20,
3329 NULL, HFILL }},
3330
3331 { &hf_sna_xid_3_exbn,
3332 { "Extended HPR Border Node",
3333 "sna.xid.type3.exbn", FT_BOOLEAN, 8, NULL, 0x10,
3334 NULL, HFILL }},
3335
3336 { &hf_sna_xid_3_genodai,
3337 { "Generalized ODAI Usage Option",
3338 "sna.xid.type3.genodai", FT_BOOLEAN, 8, NULL, 0x08,
3339 NULL, HFILL }},
3340
3341 { &hf_sna_xid_3_branch,
3342 { "Branch Indicator", "sna.xid.type3.branch",
3343 FT_UINT8, BASE_HEX, VALS(sna_xid_3_branch_vals),
3344 0x06, NULL, HFILL }},
3345
3346 { &hf_sna_xid_3_brnn,
3347 { "Option Set 1123 Indicator",
3348 "sna.xid.type3.brnn", FT_BOOLEAN, 8, NULL, 0x01,
3349 NULL, HFILL }},
3350
3351 { &hf_sna_xid_3_tg,
3352 { "XID TG", "sna.xid.type3.tg", FT_UINT8, BASE_HEX, NULL, 0x0,
3353 NULL, HFILL }},
3354
3355 { &hf_sna_xid_3_dlc,
3356 { "XID DLC", "sna.xid.type3.dlc", FT_UINT8, BASE_HEX, NULL, 0x0,
3357 NULL, HFILL }},
3358
3359 { &hf_sna_xid_3_dlen,
3360 { "DLC Dependent Section Length", "sna.xid.type3.dlen",
3361 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
3362
3363 { &hf_sna_control_len,
3364 { "Control Vector Length", "sna.control.len",
3365 FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
3366
3367 { &hf_sna_control_key,
3368 { "Control Vector Key", "sna.control.key",
3369 FT_UINT8, BASE_HEX, VALS(sna_control_vals), 0x0, NULL,
3370 HFILL }},
3371
3372 { &hf_sna_control_hprkey,
3373 { "Control Vector HPR Key", "sna.control.hprkey",
3374 FT_UINT8, BASE_HEX, VALS(sna_control_hpr_vals), 0x0, NULL,
3375 HFILL }},
3376
3377 { &hf_sna_control_05_delay,
3378 { "Channel Delay", "sna.control.05.delay",
3379 FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }},
3380
3381 { &hf_sna_control_05_type,
3382 { "Network Address Type", "sna.control.05.type",
3383 FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
3384
3385 { &hf_sna_control_05_ptp,
3386 { "Point-to-point", "sna.control.05.ptp",
3387 FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL }},
3388
3389 { &hf_sna_control_0e_type,
3390 { "Type", "sna.control.0e.type",
3391 FT_UINT8, BASE_HEX, VALS(sna_control_0e_type_vals),
3392 0, NULL, HFILL }},
3393
3394 { &hf_sna_control_0e_value,
3395 { "Value", "sna.control.0e.value",
3396 FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }},
3397
3398 { &hf_sna_padding,
3399 { "Padding", "sna.padding",
3400 FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
3401
3402 { &hf_sna_reserved,
3403 { "Reserved", "sna.reserved",
3404 FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
3405
3406 { &hf_sna_biu_segment_data,
3407 { "BIU segment data", "sna.biu_segment_data",
3408 FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
3409
3410 };
3411 static gint *ett[] = {
3412 &ett_sna,
3413 &ett_sna_th,
3414 &ett_sna_th_fid,
3415 &ett_sna_nlp_nhdr,
3416 &ett_sna_nlp_nhdr_0,
3417 &ett_sna_nlp_nhdr_1,
3418 &ett_sna_nlp_thdr,
3419 &ett_sna_nlp_thdr_8,
3420 &ett_sna_nlp_thdr_9,
3421 &ett_sna_nlp_opti_un,
3422 &ett_sna_nlp_opti_0d,
3423 &ett_sna_nlp_opti_0d_4,
3424 &ett_sna_nlp_opti_0e,
3425 &ett_sna_nlp_opti_0e_stat,
3426 &ett_sna_nlp_opti_0e_absp,
3427 &ett_sna_nlp_opti_0f,
3428 &ett_sna_nlp_opti_10,
3429 &ett_sna_nlp_opti_12,
3430 &ett_sna_nlp_opti_14,
3431 &ett_sna_nlp_opti_14_si,
3432 &ett_sna_nlp_opti_14_si_2,
3433 &ett_sna_nlp_opti_14_rr,
3434 &ett_sna_nlp_opti_14_rr_2,
3435 &ett_sna_nlp_opti_22,
3436 &ett_sna_nlp_opti_22_2,
3437 &ett_sna_nlp_opti_22_3,
3438 &ett_sna_rh,
3439 &ett_sna_rh_0,
3440 &ett_sna_rh_1,
3441 &ett_sna_rh_2,
3442 &ett_sna_gds,
3443 &ett_sna_xid_0,
3444 &ett_sna_xid_id,
3445 &ett_sna_xid_3_8,
3446 &ett_sna_xid_3_10,
3447 &ett_sna_xid_3_11,
3448 &ett_sna_xid_3_12,
3449 &ett_sna_xid_3_15,
3450 &ett_sna_control_un,
3451 &ett_sna_control_05,
3452 &ett_sna_control_05hpr,
3453 &ett_sna_control_05hpr_type,
3454 &ett_sna_control_0e,
3455 };
3456 module_t *sna_module;
3457
3458 proto_sna = proto_register_protocol("Systems Network Architecture",
3459 "SNA", "sna");
3460 proto_register_field_array(proto_sna, hf, array_length(hf));
3461 proto_register_subtree_array(ett, array_length(ett));
3462 sna_handle = register_dissector("sna", dissect_sna, proto_sna);
3463
3464 proto_sna_xid = proto_register_protocol(
3465 "Systems Network Architecture XID", "SNA XID", "sna_xid");
3466 sna_xid_handle = register_dissector("sna_xid", dissect_sna_xid, proto_sna_xid);
3467
3468 sna_address_type = address_type_dissector_register("AT_SNA", "SNA Address", sna_fid_to_str_buf, sna_address_str_len, NULL, NULL, NULL, NULL, NULL);
3469
3470 /* Register configuration options */
3471 sna_module = prefs_register_protocol(proto_sna, NULL);
3472 prefs_register_bool_preference(sna_module, "defragment",
3473 "Reassemble fragmented BIUs",
3474 "Whether fragmented BIUs should be reassembled",
3475 &sna_defragment);
3476
3477 reassembly_table_register(&sna_reassembly_table,
3478 &addresses_reassembly_table_functions);
3479 }
3480
3481 void
proto_reg_handoff_sna(void)3482 proto_reg_handoff_sna(void)
3483 {
3484 dissector_add_uint("llc.dsap", SAP_SNA_PATHCTRL, sna_handle);
3485 dissector_add_uint("llc.dsap", SAP_SNA1, sna_handle);
3486 dissector_add_uint("llc.dsap", SAP_SNA2, sna_handle);
3487 dissector_add_uint("llc.dsap", SAP_SNA3, sna_handle);
3488 dissector_add_uint("llc.dsap", SAP_SNA4, sna_handle);
3489 dissector_add_uint("llc.xid_dsap", SAP_SNA_PATHCTRL, sna_xid_handle);
3490 dissector_add_uint("llc.xid_dsap", SAP_SNA1, sna_xid_handle);
3491 dissector_add_uint("llc.xid_dsap", SAP_SNA2, sna_xid_handle);
3492 dissector_add_uint("llc.xid_dsap", SAP_SNA3, sna_xid_handle);
3493 /* RFC 2043 */
3494 dissector_add_uint("ppp.protocol", PPP_SNA, sna_handle);
3495 }
3496
3497 /*
3498 * Editor modelines - https://www.wireshark.org/tools/modelines.html
3499 *
3500 * Local variables:
3501 * c-basic-offset: 8
3502 * tab-width: 8
3503 * indent-tabs-mode: t
3504 * End:
3505 *
3506 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
3507 * :indentSize=8:tabSize=8:noTabs=false:
3508 */
3509