epan/dissectors/packet-sna.c

   1 /* packet-sna.c
   2  * Routines for SNA
   3  * Gilbert Ramirez <gram@alumni.rice.edu>
   4  * Jochen Friedrich <jochen@scram.de>
   5  *
   6  * $Id$
   7  *
   8  * Ethereal - Network traffic analyzer
   9  * By Gerald Combs <gerald@ethereal.com>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  25  */
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <glib.h>
  32 #include <epan/packet.h>
  33 #include "llcsaps.h"
  34 #include "ppptypes.h"
  35 #include <epan/sna-utils.h>
  36 #include <epan/charsets.h>
  37 #include <epan/prefs.h>
  38 #include <epan/reassemble.h>
  39
  40 /*
  41  * http://www.wanresources.com/snacell.html
  42  * ftp://ftp.software.ibm.com/networking/pub/standards/aiw/formats/
  43  *
  44  */
  45
  46 static int proto_sna = -1;
  47 static int proto_sna_xid = -1;
  48 static int hf_sna_th = -1;
  49 static int hf_sna_th_0 = -1;
  50 static int hf_sna_th_fid = -1;
  51 static int hf_sna_th_mpf = -1;
  52 static int hf_sna_th_odai = -1;
  53 static int hf_sna_th_efi = -1;
  54 static int hf_sna_th_daf = -1;
  55 static int hf_sna_th_oaf = -1;
  56 static int hf_sna_th_snf = -1;
  57 static int hf_sna_th_dcf = -1;
  58 static int hf_sna_th_lsid = -1;
  59 static int hf_sna_th_tg_sweep = -1;
  60 static int hf_sna_th_er_vr_supp_ind = -1;
  61 static int hf_sna_th_vr_pac_cnt_ind = -1;
  62 static int hf_sna_th_ntwk_prty = -1;
  63 static int hf_sna_th_tgsf = -1;
  64 static int hf_sna_th_mft = -1;
  65 static int hf_sna_th_piubf = -1;
  66 static int hf_sna_th_iern = -1;
  67 static int hf_sna_th_nlpoi = -1;
  68 static int hf_sna_th_nlp_cp = -1;
  69 static int hf_sna_th_ern = -1;
  70 static int hf_sna_th_vrn = -1;
  71 static int hf_sna_th_tpf = -1;
  72 static int hf_sna_th_vr_cwi = -1;
  73 static int hf_sna_th_tg_nonfifo_ind = -1;
  74 static int hf_sna_th_vr_sqti = -1;
  75 static int hf_sna_th_tg_snf = -1;
  76 static int hf_sna_th_vrprq = -1;
  77 static int hf_sna_th_vrprs = -1;
  78 static int hf_sna_th_vr_cwri = -1;
  79 static int hf_sna_th_vr_rwi = -1;
  80 static int hf_sna_th_vr_snf_send = -1;
  81 static int hf_sna_th_dsaf = -1;
  82 static int hf_sna_th_osaf = -1;
  83 static int hf_sna_th_snai = -1;
  84 static int hf_sna_th_def = -1;
  85 static int hf_sna_th_oef = -1;
  86 static int hf_sna_th_sa = -1;
  87 static int hf_sna_th_cmd_fmt = -1;
  88 static int hf_sna_th_cmd_type = -1;
  89 static int hf_sna_th_cmd_sn = -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
 201 static int hf_sna_xid = -1;
 202 static int hf_sna_xid_0 = -1;
 203 static int hf_sna_xid_id = -1;
 204 static int hf_sna_xid_format = -1;
 205 static int hf_sna_xid_type = -1;
 206 static int hf_sna_xid_len = -1;
 207 static int hf_sna_xid_idblock = -1;
 208 static int hf_sna_xid_idnum = -1;
 209 static int hf_sna_xid_3_8 = -1;
 210 static int hf_sna_xid_3_init_self = -1;
 211 static int hf_sna_xid_3_stand_bind = -1;
 212 static int hf_sna_xid_3_gener_bind = -1;
 213 static int hf_sna_xid_3_recve_bind = -1;
 214 static int hf_sna_xid_3_actpu = -1;
 215 static int hf_sna_xid_3_nwnode = -1;
 216 static int hf_sna_xid_3_cp = -1;
 217 static int hf_sna_xid_3_cpcp = -1;
 218 static int hf_sna_xid_3_state = -1;
 219 static int hf_sna_xid_3_nonact = -1;
 220 static int hf_sna_xid_3_cpchange = -1;
 221 static int hf_sna_xid_3_10 = -1;
 222 static int hf_sna_xid_3_asend_bind = -1;
 223 static int hf_sna_xid_3_arecv_bind = -1;
 224 static int hf_sna_xid_3_quiesce = -1;
 225 static int hf_sna_xid_3_pucap = -1;
 226 static int hf_sna_xid_3_pbn = -1;
 227 static int hf_sna_xid_3_pacing = -1;
 228 static int hf_sna_xid_3_11 = -1;
 229 static int hf_sna_xid_3_tgshare = -1;
 230 static int hf_sna_xid_3_dedsvc = -1;
 231 static int hf_sna_xid_3_12 = -1;
 232 static int hf_sna_xid_3_negcsup = -1;
 233 static int hf_sna_xid_3_negcomp = -1;
 234 static int hf_sna_xid_3_15 = -1;
 235 static int hf_sna_xid_3_partg = -1;
 236 static int hf_sna_xid_3_dlur = -1;
 237 static int hf_sna_xid_3_dlus = -1;
 238 static int hf_sna_xid_3_exbn = -1;
 239 static int hf_sna_xid_3_genodai = -1;
 240 static int hf_sna_xid_3_branch = -1;
 241 static int hf_sna_xid_3_brnn = -1;
 242 static int hf_sna_xid_3_tg = -1;
 243 static int hf_sna_xid_3_dlc = -1;
 244 static int hf_sna_xid_3_dlen = -1;
 245
 246 static int hf_sna_control_len = -1;
 247 static int hf_sna_control_key = -1;
 248 static int hf_sna_control_hprkey = -1;
 249 static int hf_sna_control_05_delay = -1;
 250 static int hf_sna_control_05_type = -1;
 251 static int hf_sna_control_05_ptp = -1;
 252 static int hf_sna_control_0e_type = -1;
 253 static int hf_sna_control_0e_value = -1;
 254
 255 static gint ett_sna = -1;
 256 static gint ett_sna_th = -1;
 257 static gint ett_sna_th_fid = -1;
 258 static gint ett_sna_nlp_nhdr = -1;
 259 static gint ett_sna_nlp_nhdr_0 = -1;
 260 static gint ett_sna_nlp_nhdr_1 = -1;
 261 static gint ett_sna_nlp_thdr = -1;
 262 static gint ett_sna_nlp_thdr_8 = -1;
 263 static gint ett_sna_nlp_thdr_9 = -1;
 264 static gint ett_sna_nlp_opti_un = -1;
 265 static gint ett_sna_nlp_opti_0d = -1;
 266 static gint ett_sna_nlp_opti_0d_4 = -1;
 267 static gint ett_sna_nlp_opti_0e = -1;
 268 static gint ett_sna_nlp_opti_0e_stat = -1;
 269 static gint ett_sna_nlp_opti_0e_absp = -1;
 270 static gint ett_sna_nlp_opti_0f = -1;
 271 static gint ett_sna_nlp_opti_10 = -1;
 272 static gint ett_sna_nlp_opti_12 = -1;
 273 static gint ett_sna_nlp_opti_14 = -1;
 274 static gint ett_sna_nlp_opti_14_si = -1;
 275 static gint ett_sna_nlp_opti_14_si_2 = -1;
 276 static gint ett_sna_nlp_opti_14_rr = -1;
 277 static gint ett_sna_nlp_opti_14_rr_2 = -1;
 278 static gint ett_sna_nlp_opti_22 = -1;
 279 static gint ett_sna_nlp_opti_22_2 = -1;
 280 static gint ett_sna_nlp_opti_22_3 = -1;
 281 static gint ett_sna_rh = -1;
 282 static gint ett_sna_rh_0 = -1;
 283 static gint ett_sna_rh_1 = -1;
 284 static gint ett_sna_rh_2 = -1;
 285 static gint ett_sna_gds = -1;
 286 static gint ett_sna_xid_0 = -1;
 287 static gint ett_sna_xid_id = -1;
 288 static gint ett_sna_xid_3_8 = -1;
 289 static gint ett_sna_xid_3_10 = -1;
 290 static gint ett_sna_xid_3_11 = -1;
 291 static gint ett_sna_xid_3_12 = -1;
 292 static gint ett_sna_xid_3_15 = -1;
 293 static gint ett_sna_control_un = -1;
 294 static gint ett_sna_control_05 = -1;
 295 static gint ett_sna_control_05hpr = -1;
 296 static gint ett_sna_control_05hpr_type = -1;
 297 static gint ett_sna_control_0e = -1;
 298
 299 static dissector_handle_t data_handle;
 300
 301 /* Defragment fragmented SNA BIUs*/
 302 static gboolean sna_defragment = FALSE;
 303 static GHashTable *sna_fragment_table = NULL;
 304 static GHashTable *sna_reassembled_table = NULL;
 305
 306 /* Format Identifier */
 307 static const value_string sna_th_fid_vals[] = {
 308         { 0x0,  "SNA device <--> Non-SNA Device" },
 309         { 0x1,  "Subarea Nodes, without ER or VR" },
 310         { 0x2,  "Subarea Node <--> PU2" },
 311         { 0x3,  "Subarea Node or SNA host <--> Subarea Node" },
 312         { 0x4,  "Subarea Nodes, supporting ER and VR" },
 313         { 0x5,  "HPR RTP endpoint nodes" },
 314         { 0xa,  "HPR NLP Frame Routing" },
 315         { 0xb,  "HPR NLP Frame Routing" },
 316         { 0xc,  "HPR NLP Automatic Network Routing" },
 317         { 0xd,  "HPR NLP Automatic Network Routing" },
 318         { 0xf,  "Adjaced Subarea Nodes, supporting ER and VR" },
 319         { 0x0,  NULL }
 320 };
 321
 322 /* Mapping Field */
 323 #define MPF_MIDDLE_SEGMENT  0
 324 #define MPF_LAST_SEGMENT    1
 325 #define MPF_FIRST_SEGMENT   2
 326 #define MPF_WHOLE_BIU       3
 327
 328 static const value_string sna_th_mpf_vals[] = {
 329         { MPF_MIDDLE_SEGMENT,   "Middle segment of a BIU" },
 330         { MPF_LAST_SEGMENT,     "Last segment of a BIU" },
 331         { MPF_FIRST_SEGMENT,    "First segment of a BIU" },
 332         { MPF_WHOLE_BIU,        "Whole BIU" },
 333         { 0,   NULL }
 334 };
 335
 336 /* Expedited Flow Indicator */
 337 static const value_string sna_th_efi_vals[] = {
 338         { 0, "Normal Flow" },
 339         { 1, "Expedited Flow" },
 340         { 0x0,  NULL }
 341 };
 342
 343 /* Request/Response Indicator */
 344 static const value_string sna_rh_rri_vals[] = {
 345         { 0, "Request" },
 346         { 1, "Response" },
 347         { 0x0,  NULL }
 348 };
 349
 350 /* Request/Response Unit Category */
 351 static const value_string sna_rh_ru_category_vals[] = {
 352         { 0, "Function Management Data (FMD)" },
 353         { 1, "Network Control (NC)" },
 354         { 2, "Data Flow Control (DFC)" },
 355         { 3, "Session Control (SC)" },
 356         { 0x0,  NULL }
 357 };
 358
 359 /* Format Indicator */
 360 static const true_false_string sna_rh_fi_truth =
 361         { "FM Header", "No FM Header" };
 362
 363 /* Sense Data Included */
 364 static const true_false_string sna_rh_sdi_truth =
 365         { "Included", "Not Included" };
 366
 367 /* Begin Chain Indicator */
 368 static const true_false_string sna_rh_bci_truth =
 369         { "First in Chain", "Not First in Chain" };
 370
 371 /* End Chain Indicator */
 372 static const true_false_string sna_rh_eci_truth =
 373         { "Last in Chain", "Not Last in Chain" };
 374
 375 /* Lengith-Checked Compression Indicator */
 376 static const true_false_string sna_rh_lcci_truth =
 377         { "Compressed", "Not Compressed" };
 378
 379 /* Response Type Indicator */
 380 static const true_false_string sna_rh_rti_truth =
 381         { "Negative", "Positive" };
 382
 383 /* Queued Response Indicator */
 384 static const true_false_string sna_rh_qri_truth =
 385         { "Enqueue response in TC queues", "Response bypasses TC queues" };
 386
 387 /* Code Selection Indicator */
 388 static const value_string sna_rh_csi_vals[] = {
 389         { 0, "EBCDIC" },
 390         { 1, "ASCII" },
 391         { 0x0,  NULL }
 392 };
 393
 394 /* TG Sweep */
 395 static const value_string sna_th_tg_sweep_vals[] = {
 396         { 0, "This PIU may overtake any PU ahead of it." },
 397         { 1, "This PIU does not ovetake any PIU ahead of it." },
 398         { 0x0,  NULL }
 399 };
 400
 401 /* ER_VR_SUPP_IND */
 402 static const value_string sna_th_er_vr_supp_ind_vals[] = {
 403         { 0, "Each node supports ER and VR protocols" },
 404         { 1, "Includes at least one node that does not support ER and VR"
 405             " protocols"  },
 406         { 0x0,  NULL }
 407 };
 408
 409 /* VR_PAC_CNT_IND */
 410 static const value_string sna_th_vr_pac_cnt_ind_vals[] = {
 411         { 0, "Pacing count on the VR has not reached 0" },
 412         { 1, "Pacing count on the VR has reached 0" },
 413         { 0x0,  NULL }
 414 };
 415
 416 /* NTWK_PRTY */
 417 static const value_string sna_th_ntwk_prty_vals[] = {
 418         { 0, "PIU flows at a lower priority" },
 419         { 1, "PIU flows at network priority (highest transmission priority)" },
 420         { 0x0,  NULL }
 421 };
 422
 423 /* TGSF */
 424 static const value_string sna_th_tgsf_vals[] = {
 425         { 0, "Not segmented" },
 426         { 1, "Last segment" },
 427         { 2, "First segment" },
 428         { 3, "Middle segment" },
 429         { 0x0,  NULL }
 430 };
 431
 432 /* PIUBF */
 433 static const value_string sna_th_piubf_vals[] = {
 434         { 0, "Single PIU frame" },
 435         { 1, "Last PIU of a multiple PIU frame" },
 436         { 2, "First PIU of a multiple PIU frame" },
 437         { 3, "Middle PIU of a multiple PIU frame" },
 438         { 0x0,  NULL }
 439 };
 440
 441 /* NLPOI */
 442 static const value_string sna_th_nlpoi_vals[] = {
 443         { 0, "NLP starts within this FID4 TH" },
 444         { 1, "NLP byte 0 starts after RH byte 0 following NLP C/P pad" },
 445         { 0x0,  NULL }
 446 };
 447
 448 /* TPF */
 449 static const value_string sna_th_tpf_vals[] = {
 450         { 0, "Low Priority" },
 451         { 1, "Medium Priority" },
 452         { 2, "High Priority" },
 453         { 3, "Network Priority" },
 454         { 0x0,  NULL }
 455 };
 456
 457 /* VR_CWI */
 458 static const value_string sna_th_vr_cwi_vals[] = {
 459         { 0, "Increment window size" },
 460         { 1, "Decrement window size" },
 461         { 0x0,  NULL }
 462 };
 463
 464 /* TG_NONFIFO_IND */
 465 static const true_false_string sna_th_tg_nonfifo_ind_truth =
 466         { "TG FIFO is not required", "TG FIFO is required" };
 467
 468 /* VR_SQTI */
 469 static const value_string sna_th_vr_sqti_vals[] = {
 470         { 0, "Non-sequenced, Non-supervisory" },
 471         { 1, "Non-sequenced, Supervisory" },
 472         { 2, "Singly-sequenced" },
 473         { 0x0,  NULL }
 474 };
 475
 476 /* VRPRQ */
 477 static const true_false_string sna_th_vrprq_truth = {
 478         "VR pacing request is sent asking for a VR pacing response",
 479         "No VR pacing response is requested",
 480 };
 481
 482 /* VRPRS */
 483 static const true_false_string sna_th_vrprs_truth = {
 484         "VR pacing response is sent in response to a VRPRQ bit set",
 485         "No pacing response sent",
 486 };
 487
 488 /* VR_CWRI */
 489 static const value_string sna_th_vr_cwri_vals[] = {
 490         { 0, "Increment window size by 1" },
 491         { 1, "Decrement window size by 1" },
 492         { 0x0,  NULL }
 493 };
 494
 495 /* VR_RWI */
 496 static const true_false_string sna_th_vr_rwi_truth = {
 497         "Reset window size to the minimum specified in NC_ACTVR",
 498         "Do not reset window size",
 499 };
 500
 501 /* Switching Mode */
 502 static const value_string sna_nlp_sm_vals[] = {
 503         { 5, "Function routing" },
 504         { 6, "Automatic network routing" },
 505         { 0x0,  NULL }
 506 };
 507
 508 static const true_false_string sna_nlp_tspi_truth =
 509         { "Time sensitive", "Not time sensitive" };
 510
 511 static const true_false_string sna_nlp_slowdn1_truth =
 512         { "Minor congestion", "No minor congestion" };
 513
 514 static const true_false_string sna_nlp_slowdn2_truth =
 515         { "Major congestion", "No major congestion" };
 516
 517 /* Function Type */
 518 static const value_string sna_nlp_ft_vals[] = {
 519         { 0x10, "LDLC" },
 520         { 0x0,  NULL }
 521 };
 522
 523 static const value_string sna_nlp_frh_vals[] = {
 524         { 0x03, "XID complete request" },
 525         { 0x04, "XID complete response" },
 526         { 0x0,  NULL }
 527 };
 528
 529 static const true_false_string sna_nlp_setupi_truth =
 530         { "Connection setup segment present", "Connection setup segment not"
 531             " present" };
 532
 533 static const true_false_string sna_nlp_somi_truth =
 534         { "Start of message", "Not start of message" };
 535
 536 static const true_false_string sna_nlp_eomi_truth =
 537         { "End of message", "Not end of message" };
 538
 539 static const true_false_string sna_nlp_sri_truth =
 540         { "Status requested", "No status requested" };
 541
 542 static const true_false_string sna_nlp_rasapi_truth =
 543         { "Reply as soon as possible", "No need to reply as soon as possible" };
 544
 545 static const true_false_string sna_nlp_retryi_truth =
 546         { "Undefined", "Sender will retransmit" };
 547
 548 static const true_false_string sna_nlp_lmi_truth =
 549         { "Last message", "Not last message" };
 550
 551 static const true_false_string sna_nlp_cqfi_truth =
 552         { "CQFI included", "CQFI not included" };
 553
 554 static const true_false_string sna_nlp_osi_truth =
 555         { "Optional segments present", "No optional segments present" };
 556
 557 static const value_string sna_xid_3_state_vals[] = {
 558         { 0x00, "Exchange state indicators not supported" },
 559         { 0x01, "Negotiation-proceeding exchange" },
 560         { 0x02, "Prenegotiation exchange" },
 561         { 0x03, "Nonactivation exchange" },
 562         { 0x0, NULL }
 563 };
 564
 565 static const value_string sna_xid_3_branch_vals[] = {
 566         { 0x00, "Sender does not support branch extender" },
 567         { 0x01, "TG is branch uplink" },
 568         { 0x02, "TG is branch downlink" },
 569         { 0x03, "TG is neither uplink nor downlink" },
 570         { 0x0, NULL }
 571 };
 572
 573 static const value_string sna_xid_type_vals[] = {
 574         { 0x01, "T1 node" },
 575         { 0x02, "T2.0 or T2.1 node" },
 576         { 0x03, "Reserved" },
 577         { 0x04, "T4 or T5 node" },
 578         { 0x0, NULL }
 579 };
 580
 581 static const value_string sna_nlp_opti_vals[] = {
 582         { 0x0d, "Connection Setup Segment" },
 583         { 0x0e, "Status Segment" },
 584         { 0x0f, "Client Out Of Band Bits Segment" },
 585         { 0x10, "Connection Identifier Exchange Segment" },
 586         { 0x12, "Connection Fault Segment" },
 587         { 0x14, "Switching Information Segment" },
 588         { 0x22, "Adaptive Rate-Based Segment" },
 589         { 0x0, NULL }
 590 };
 591
 592 static const value_string sna_nlp_opti_0d_version_vals[] = {
 593         { 0x0101, "Version 1.1" },
 594         { 0x0, NULL }
 595 };
 596
 597 static const value_string sna_nlp_opti_0f_bits_vals[] = {
 598         { 0x0001, "Request Deactivation" },
 599         { 0x8000, "Reply - OK" },
 600         { 0x8004, "Reply - Reject" },
 601         { 0x0, NULL }
 602 };
 603
 604 static const value_string sna_nlp_opti_22_type_vals[] = {
 605         { 0x00, "Setup" },
 606         { 0x01, "Rate Reply" },
 607         { 0x02, "Rate Request" },
 608         { 0x03, "Rate Request/Rate Reply" },
 609         { 0x0, NULL }
 610 };
 611
 612 static const value_string sna_nlp_opti_22_raa_vals[] = {
 613         { 0x00, "Normal" },
 614         { 0x01, "Restraint" },
 615         { 0x02, "Slowdown1" },
 616         { 0x03, "Slowdown2" },
 617         { 0x04, "Critical" },
 618         { 0x0, NULL }
 619 };
 620
 621 static const value_string sna_nlp_opti_22_arb_vals[] = {
 622         { 0x00, "Base Mode ARB" },
 623         { 0x01, "Responsive Mode ARB" },
 624         { 0x0, NULL }
 625 };
 626
 627 /* GDS Variable Type */
 628 static const value_string sna_gds_var_vals[] = {
 629         { 0x1210, "Change Number Of Sessions" },
 630         { 0x1211, "Exchange Log Name" },
 631         { 0x1212, "Control Point Management Services Unit" },
 632         { 0x1213, "Compare States" },
 633         { 0x1214, "LU Names Position" },
 634         { 0x1215, "LU Name" },
 635         { 0x1217, "Do Know" },
 636         { 0x1218, "Partner Restart" },
 637         { 0x1219, "Don't Know" },
 638         { 0x1220, "Sign-Off" },
 639         { 0x1221, "Sign-On" },
 640         { 0x1222, "SNMP-over-SNA" },
 641         { 0x1223, "Node Address Service" },
 642         { 0x12C1, "CP Capabilities" },
 643         { 0x12C2, "Topology Database Update" },
 644         { 0x12C3, "Register Resource" },
 645         { 0x12C4, "Locate" },
 646         { 0x12C5, "Cross-Domain Initiate" },
 647         { 0x12C9, "Delete Resource" },
 648         { 0x12CA, "Find Resource" },
 649         { 0x12CB, "Found Resource" },
 650         { 0x12CC, "Notify" },
 651         { 0x12CD, "Initiate-Other Cross-Domain" },
 652         { 0x12CE, "Route Setup" },
 653         { 0x12E1, "Error Log" },
 654         { 0x12F1, "Null Data" },
 655         { 0x12F2, "User Control Date" },
 656         { 0x12F3, "Map Name" },
 657         { 0x12F4, "Error Data" },
 658         { 0x12F6, "Authentication Token Data" },
 659         { 0x12F8, "Service Flow Authentication Token Data" },
 660         { 0x12FF, "Application Data" },
 661         { 0x1310, "MDS Message Unit" },
 662         { 0x1311, "MDS Routing Information" },
 663         { 0x1500, "FID2 Encapsulation" },
 664         { 0x0,    NULL }
 665 };
 666
 667 /* Control Vector Type */
 668 static const value_string sna_control_vals[] = {
 669         { 0x00,   "SSCP-LU Session Capabilities Control Vector" },
 670         { 0x01,   "Date-Time Control Vector" },
 671         { 0x02,   "Subarea Routing Control Vector" },
 672         { 0x03,   "SDLC Secondary Station Control Vector" },
 673         { 0x04,   "LU Control Vector" },
 674         { 0x05,   "Channel Control Vector" },
 675         { 0x06,   "Cross-Domain Resource Manager (CDRM) Control Vector" },
 676         { 0x07,   "PU FMD-RU-Usage Control Vector" },
 677         { 0x08,   "Intensive Mode Control Vector" },
 678         { 0x09,   "Activation Request / Response Sequence Identifier Control"
 679             " Vector" },
 680         { 0x0a,   "User Request Correlator Control Vector" },
 681         { 0x0b,   "SSCP-PU Session Capabilities Control Vector" },
 682         { 0x0c,   "LU-LU Session Capabilities Control Vector" },
 683         { 0x0d,   "Mode / Class-of-Service / Virtual-Route-Identifier List"
 684             " Control Vector" },
 685         { 0x0e,   "Network Name Control Vector" },
 686         { 0x0f,   "Link Capabilities and Status Control Vector" },
 687         { 0x10,   "Product Set ID Control Vector" },
 688         { 0x11,   "Load Module Correlation Control Vector" },
 689         { 0x12,   "Network Identifier Control Vector" },
 690         { 0x13,   "Gateway Support Capabilities Control Vector" },
 691         { 0x14,   "Session Initiation Control Vector" },
 692         { 0x15,   "Network-Qualified Address Pair Control Vector" },
 693         { 0x16,   "Names Substitution Control Vector" },
 694         { 0x17,   "SSCP Identifier Control Vector" },
 695         { 0x18,   "SSCP Name Control Vector" },
 696         { 0x19,   "Resource Identifier Control Vector" },
 697         { 0x1a,   "NAU Address Control Vector" },
 698         { 0x1b,   "VRID List Control Vector" },
 699         { 0x1c,   "Network-Qualified Name Pair Control Vector" },
 700         { 0x1e,   "VR-ER Mapping Data Control Vector" },
 701         { 0x1f,   "ER Configuration Control Vector" },
 702         { 0x23,   "Local-Form Session Identifier Control Vector" },
 703         { 0x24,   "IPL Load Module Request Control Vector" },
 704         { 0x25,   "Security ID Control Control Vector" },
 705         { 0x26,   "Network Connection Endpoint Identifier Control Vector" },
 706         { 0x27,   "XRF Session Activation Control Vector" },
 707         { 0x28,   "Related Session Identifier Control Vector" },
 708         { 0x29,   "Session State Data Control Vector" },
 709         { 0x2a,   "Session Information Control Vector" },
 710         { 0x2b,   "Route Selection Control Vector" },
 711         { 0x2c,   "COS/TPF Control Vector" },
 712         { 0x2d,   "Mode Control Vector" },
 713         { 0x2f,   "LU Definition Control Vector" },
 714         { 0x30,   "Assign LU Characteristics Control Vector" },
 715         { 0x31,   "BIND Image Control Vector" },
 716         { 0x32,   "Short-Hold Mode Control Vector" },
 717         { 0x33,   "ENCP Search Control Control Vector" },
 718         { 0x34,   "LU Definition Override Control Vector" },
 719         { 0x35,   "Extended Sense Data Control Vector" },
 720         { 0x36,   "Directory Error Control Vector" },
 721         { 0x37,   "Directory Entry Correlator Control Vector" },
 722         { 0x38,   "Short-Hold Mode Emulation Control Vector" },
 723         { 0x39,   "Network Connection Endpoint (NCE) Instance Identifier"
 724             " Control Vector" },
 725         { 0x3a,   "Route Status Data Control Vector" },
 726         { 0x3b,   "VR Congestion Data Control Vector" },
 727         { 0x3c,   "Associated Resource Entry Control Vector" },
 728         { 0x3d,   "Directory Entry Control Vector" },
 729         { 0x3e,   "Directory Entry Characteristic Control Vector" },
 730         { 0x3f,   "SSCP (SLU) Capabilities Control Vector" },
 731         { 0x40,   "Real Associated Resource Control Vector" },
 732         { 0x41,   "Station Parameters Control Vector" },
 733         { 0x42,   "Dynamic Path Update Data Control Vector" },
 734         { 0x43,   "Extended SDLC Station Control Vector" },
 735         { 0x44,   "Node Descriptor Control Vector" },
 736         { 0x45,   "Node Characteristics Control Vector" },
 737         { 0x46,   "TG Descriptor Control Vector" },
 738         { 0x47,   "TG Characteristics Control Vector" },
 739         { 0x48,   "Topology Resource Descriptor Control Vector" },
 740         { 0x49,   "Multinode Persistent Sessions (MNPS) LU Names Control"
 741             " Vector" },
 742         { 0x4a,   "Real Owning Control Point Control Vector" },
 743         { 0x4b,   "RTP Transport Connection Identifier Control Vector" },
 744         { 0x51,   "DLUR/S Capabilities Control Vector" },
 745         { 0x52,   "Primary Send Pacing Window Size Control Vector" },
 746         { 0x56,   "Call Security Verification Control Vector" },
 747         { 0x57,   "DLC Connection Data Control Vector" },
 748         { 0x59,   "Installation-Defined CDINIT Data Control Vector" },
 749         { 0x5a,   "Session Services Extension Support Control Vector" },
 750         { 0x5b,   "Interchange Node Support Control Vector" },
 751         { 0x5c,   "APPN Message Transport Control Vector" },
 752         { 0x5d,   "Subarea Message Transport Control Vector" },
 753         { 0x5e,   "Related Request Control Vector" },
 754         { 0x5f,   "Extended Fully Qualified PCID Control Vector" },
 755         { 0x60,   "Fully Qualified PCID Control Vector" },
 756         { 0x61,   "HPR Capabilities Control Vector" },
 757         { 0x62,   "Session Address Control Vector" },
 758         { 0x63,   "Cryptographic Key Distribution Control Vector" },
 759         { 0x64,   "TCP/IP Information Control Vector" },
 760         { 0x65,   "Device Characteristics Control Vector" },
 761         { 0x66,   "Length-Checked Compression Control Vector" },
 762         { 0x67,   "Automatic Network Routing (ANR) Path Control Vector" },
 763         { 0x68,   "XRF/Session Cryptography Control Vector" },
 764         { 0x69,   "Switched Parameters Control Vector" },
 765         { 0x6a,   "ER Congestion Data Control Vector" },
 766         { 0x71,   "Triple DES Cryptography Key Continuation Control Vector" },
 767         { 0xfe,   "Control Vector Keys Not Recognized" },
 768         { 0x0,    NULL }
 769 };
 770
 771 static const value_string sna_control_hpr_vals[] = {
 772         { 0x00,   "Node Identifier Control Vector" },
 773         { 0x03,   "Network ID Control Vector" },
 774         { 0x05,   "Network Address Control Vector" },
 775         { 0x0,    NULL }
 776 };
 777
 778 static const value_string sna_control_0e_type_vals[] = {
 779         { 0xF1,   "PU Name" },
 780         { 0xF3,   "LU Name" },
 781         { 0xF4,   "CP Name" },
 782         { 0xF5,   "SSCP Name" },
 783         { 0xF6,   "NNCP Name" },
 784         { 0xF7,   "Link Station Name" },
 785         { 0xF8,   "CP Name of CP(PLU)" },
 786         { 0xF9,   "CP Name of CP(SLU)" },
 787         { 0xFA,   "Generic Name" },
 788         { 0x0,    NULL }
 789 };
 790
 791 /* Values to direct the top-most dissector what to dissect
 792  * after the TH. */
 793 enum next_dissection_enum {
 794     stop_here,
 795     rh_only,
 796     everything
 797 };
 798
 799 enum parse {
 800     LT,
 801     KL
 802 };
 803
 804 typedef enum next_dissection_enum next_dissection_t;
 805
 806 static void dissect_xid (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
 807 static void dissect_fid (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
 808 static void dissect_nlp (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
 809 static void dissect_gds (tvbuff_t*, packet_info*, proto_tree*, proto_tree*);
 810 static void dissect_rh (tvbuff_t*, int, proto_tree*);
 811 static void dissect_control(tvbuff_t*, int, int, proto_tree*, int, enum parse);
 812
 813 /* --------------------------------------------------------------------
 814  * Chapter 2 High-Performance Routing (HPR) Headers
 815  * --------------------------------------------------------------------
 816  */
 817
 818 static void
 819 dissect_optional_0d(tvbuff_t *tvb, proto_tree *tree)
 820 {
 821         int             bits, offset, len, pad;
 822         proto_tree      *sub_tree;
 823         proto_item      *sub_ti = NULL;
 824
 825         if (!tree)
 826                 return;
 827
 828         proto_tree_add_item(tree, hf_sna_nlp_opti_0d_version, tvb, 2, 2, FALSE);
 829         bits = tvb_get_guint8(tvb, 4);
 830
 831         sub_ti = proto_tree_add_uint(tree, hf_sna_nlp_opti_0d_4,
 832             tvb, 4, 1, bits);
 833         sub_tree = proto_item_add_subtree(sub_ti,
 834             ett_sna_nlp_opti_0d_4);
 835
 836         proto_tree_add_boolean(sub_tree, hf_sna_nlp_opti_0d_target,
 837             tvb, 4, 1, bits);
 838         proto_tree_add_boolean(sub_tree, hf_sna_nlp_opti_0d_arb,
 839             tvb, 4, 1, bits);
 840         proto_tree_add_boolean(sub_tree, hf_sna_nlp_opti_0d_reliable,
 841             tvb, 4, 1, bits);
 842         proto_tree_add_boolean(sub_tree, hf_sna_nlp_opti_0d_dedicated,
 843             tvb, 4, 1, bits);
 844
 845         proto_tree_add_text(tree, tvb, 5, 3, "Reserved");
 846
 847         offset = 8;
 848
 849         while (tvb_offset_exists(tvb, offset)) {
 850                 len = tvb_get_guint8(tvb, offset+0);
 851                 if (len) {
 852                         dissect_control(tvb, offset, len, tree, 1, LT);
 853                         pad = (len+3) & 0xfffc;
 854                         if (pad > len)
 855                                 proto_tree_add_text(tree, tvb, offset+len,
 856                                     pad-len, "Padding");
 857                         offset += pad;
 858                 } else {
 859                         /* Avoid endless loop */
 860                         return;
 861                 }
 862         }
 863 }
 864
 865 static void
 866 dissect_optional_0e(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 867 {
 868         int             bits, offset;
 869         proto_tree      *sub_tree;
 870         proto_item      *sub_ti = NULL;
 871
 872         bits = tvb_get_guint8(tvb, 2);
 873         offset = 20;
 874
 875         if (tree) {
 876                 sub_ti = proto_tree_add_item(tree, hf_sna_nlp_opti_0e_stat,
 877                     tvb, 2, 1, FALSE);
 878                 sub_tree = proto_item_add_subtree(sub_ti,
 879                     ett_sna_nlp_opti_0e_stat);
 880
 881                 proto_tree_add_boolean(sub_tree, hf_sna_nlp_opti_0e_gap,
 882                     tvb, 2, 1, bits);
 883                 proto_tree_add_boolean(sub_tree, hf_sna_nlp_opti_0e_idle,
 884                     tvb, 2, 1, bits);
 885                 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_nabsp,
 886                     tvb, 3, 1, FALSE);
 887                 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_sync,
 888                     tvb, 4, 2, FALSE);
 889                 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_echo,
 890                     tvb, 6, 2, FALSE);
 891                 proto_tree_add_item(tree, hf_sna_nlp_opti_0e_rseq,
 892                     tvb, 8, 4, FALSE);
 893                 proto_tree_add_text(tree, tvb, 12, 8, "Reserved");
 894
 895                 if (tvb_offset_exists(tvb, offset))
 896                         call_dissector(data_handle,
 897                             tvb_new_subset(tvb, 4, -1, -1), pinfo, tree);
 898         }
 899         if (bits & 0x40) {
 900                 if (check_col(pinfo->cinfo, COL_INFO))
 901                         col_add_str(pinfo->cinfo, COL_INFO,
 902                             "HPR Idle Message");
 903         } else {
 904                 if (check_col(pinfo->cinfo, COL_INFO))
 905                         col_add_str(pinfo->cinfo, COL_INFO,
 906                             "HPR Status Message");
 907         }
 908 }
 909
 910 static void
 911 dissect_optional_0f(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 912 {
 913         if (!tree)
 914                 return;
 915
 916         proto_tree_add_item(tree, hf_sna_nlp_opti_0f_bits, tvb, 2, 2, FALSE);
 917         if (tvb_offset_exists(tvb, 4))
 918                 call_dissector(data_handle,
 919                     tvb_new_subset(tvb, 4, -1, -1), pinfo, tree);
 920 }
 921
 922 static void
 923 dissect_optional_10(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 924 {
 925         if (!tree)
 926                 return;
 927
 928         proto_tree_add_text(tree, tvb, 2, 2, "Reserved");
 929         proto_tree_add_item(tree, hf_sna_nlp_opti_10_tcid, tvb, 4, 8, FALSE);
 930         if (tvb_offset_exists(tvb, 12))
 931                 call_dissector(data_handle,
 932                     tvb_new_subset(tvb, 12, -1, -1), pinfo, tree);
 933 }
 934
 935 static void
 936 dissect_optional_12(tvbuff_t *tvb, proto_tree *tree)
 937 {
 938         if (!tree)
 939                 return;
 940
 941         proto_tree_add_text(tree, tvb, 2, 2, "Reserved");
 942         proto_tree_add_item(tree, hf_sna_nlp_opti_12_sense, tvb, 4, -1, FALSE);
 943 }
 944
 945 static void
 946 dissect_optional_14(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 947 {
 948         proto_tree      *sub_tree, *bf_tree;
 949         proto_item      *sub_item, *bf_item;
 950         int             len, pad, type, bits, offset, num, sublen;
 951
 952         if (!tree)
 953                 return;
 954
 955         proto_tree_add_text(tree, tvb, 2, 2, "Reserved");
 956
 957         offset = 4;
 958
 959         len = tvb_get_guint8(tvb, offset);
 960         type = tvb_get_guint8(tvb, offset+1);
 961
 962         if ((type != 0x83) || (len <= 16)) {
 963                 /* Invalid */
 964                 call_dissector(data_handle,
 965                     tvb_new_subset(tvb, offset, -1, -1), pinfo, tree);
 966                 return;
 967         }
 968         sub_item = proto_tree_add_text(tree, tvb, offset, len,
 969             "Switching Information Control Vector");
 970         sub_tree = proto_item_add_subtree(sub_item, ett_sna_nlp_opti_14_si);
 971
 972         proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_si_len,
 973             tvb, offset, 1, len);
 974         proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_si_key,
 975             tvb, offset+1, 1, type);
 976
 977         bits = tvb_get_guint8(tvb, offset+2);
 978         bf_item = proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_si_2,
 979             tvb, offset+2, 1, bits);
 980         bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_opti_14_si_2);
 981
 982         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_14_si_refifo,
 983             tvb, offset+2, 1, bits);
 984         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_14_si_mobility,
 985             tvb, offset+2, 1, bits);
 986         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_14_si_dirsearch,
 987             tvb, offset+2, 1, bits);
 988         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_14_si_limitres,
 989             tvb, offset+2, 1, bits);
 990         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_14_si_ncescope,
 991             tvb, offset+2, 1, bits);
 992         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_14_si_mnpsrscv,
 993             tvb, offset+2, 1, bits);
 994
 995         proto_tree_add_text(sub_tree, tvb, offset+3, 1, "Reserved");
 996         proto_tree_add_item(sub_tree, hf_sna_nlp_opti_14_si_maxpsize,
 997             tvb, offset+4, 4, FALSE);
 998         proto_tree_add_item(sub_tree, hf_sna_nlp_opti_14_si_switch,
 999             tvb, offset+8, 4, FALSE);
1000         proto_tree_add_item(sub_tree, hf_sna_nlp_opti_14_si_alive,
1001             tvb, offset+12, 4, FALSE);
1002
1003         dissect_control(tvb, offset+16, len-16, sub_tree, 1, LT);
1004
1005         pad = (len+3) & 0xfffc;
1006         if (pad > len)
1007                 proto_tree_add_text(sub_tree, tvb, offset+len, pad-len,
1008                     "Padding");
1009         offset += pad;
1010
1011         len = tvb_get_guint8(tvb, offset);
1012         type = tvb_get_guint8(tvb, offset+1);
1013
1014         if ((type != 0x85) || ( len < 4))  {
1015                 /* Invalid */
1016                 call_dissector(data_handle,
1017                     tvb_new_subset(tvb, offset, -1, -1), pinfo, tree);
1018                 return;
1019         }
1020         sub_item = proto_tree_add_text(tree, tvb, offset, len,
1021             "Return Route TG Descriptor Control Vector");
1022         sub_tree = proto_item_add_subtree(sub_item, ett_sna_nlp_opti_14_rr);
1023
1024         proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_rr_len,
1025             tvb, offset, 1, len);
1026         proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_rr_key,
1027             tvb, offset+1, 1, type);
1028
1029         bits = tvb_get_guint8(tvb, offset+2);
1030         bf_item = proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_rr_2,
1031             tvb, offset+2, 1, bits);
1032         bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_opti_14_rr_2);
1033
1034         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_14_rr_bfe,
1035             tvb, offset+2, 1, bits);
1036
1037         num = tvb_get_guint8(tvb, offset+3);
1038
1039         proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_14_rr_num,
1040             tvb, offset+3, 1, num);
1041
1042         offset += 4;
1043
1044         while (num) {
1045                 sublen = tvb_get_guint8(tvb, offset);
1046                 if (sublen) {
1047                         dissect_control(tvb, offset, sublen, sub_tree, 1, LT);
1048                 } else {
1049                         /* Invalid */
1050                         call_dissector(data_handle,
1051                             tvb_new_subset(tvb, offset, -1, -1), pinfo, tree);
1052                         return;
1053                 }
1054                 /* No padding here */
1055                 offset += sublen;
1056                 num--;
1057         }
1058 }
1059
1060 static void
1061 dissect_optional_22(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1062 {
1063         proto_tree      *bf_tree;
1064         proto_item      *bf_item;
1065         int             bits, type;
1066
1067         if (!tree)
1068                 return;
1069
1070         bits = tvb_get_guint8(tvb, 2);
1071         type = (bits & 0xc0) >> 6;
1072
1073         bf_item = proto_tree_add_uint(tree, hf_sna_nlp_opti_22_2,
1074             tvb, 2, 1, bits);
1075         bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_opti_22_2);
1076
1077         proto_tree_add_uint(bf_tree, hf_sna_nlp_opti_22_type,
1078             tvb, 2, 1, bits);
1079         proto_tree_add_uint(bf_tree, hf_sna_nlp_opti_22_raa,
1080             tvb, 2, 1, bits);
1081         proto_tree_add_boolean(bf_tree, hf_sna_nlp_opti_22_parity,
1082             tvb, 2, 1, bits);
1083         proto_tree_add_uint(bf_tree, hf_sna_nlp_opti_22_arb,
1084             tvb, 2, 1, bits);
1085
1086         bits = tvb_get_guint8(tvb, 3);
1087
1088         bf_item = proto_tree_add_uint(tree, hf_sna_nlp_opti_22_3,
1089             tvb, 3, 1, bits);
1090         bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_opti_22_3);
1091
1092         proto_tree_add_uint(bf_tree, hf_sna_nlp_opti_22_ratereq,
1093             tvb, 3, 1, bits);
1094         proto_tree_add_uint(bf_tree, hf_sna_nlp_opti_22_raterep,
1095             tvb, 3, 1, bits);
1096
1097         proto_tree_add_item(tree, hf_sna_nlp_opti_22_field1,
1098             tvb, 4, 4, FALSE);
1099         proto_tree_add_item(tree, hf_sna_nlp_opti_22_field2,
1100             tvb, 8, 4, FALSE);
1101
1102         if (type == 0) {
1103                 proto_tree_add_item(tree, hf_sna_nlp_opti_22_field3,
1104                     tvb, 12, 4, FALSE);
1105                 proto_tree_add_item(tree, hf_sna_nlp_opti_22_field4,
1106                     tvb, 16, 4, FALSE);
1107
1108                 if (tvb_offset_exists(tvb, 20))
1109                         call_dissector(data_handle,
1110                             tvb_new_subset(tvb, 20, -1, -1), pinfo, tree);
1111         } else {
1112                 if (tvb_offset_exists(tvb, 12))
1113                         call_dissector(data_handle,
1114                             tvb_new_subset(tvb, 12, -1, -1), pinfo, tree);
1115         }
1116 }
1117
1118 static void
1119 dissect_optional(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1120 {
1121         proto_tree      *sub_tree;
1122         proto_item      *sub_item;
1123         int             offset, type, len;
1124         gint            ett;
1125
1126         sub_tree = NULL;
1127
1128         offset = 0;
1129
1130         while (tvb_offset_exists(tvb, offset)) {
1131                 len = tvb_get_guint8(tvb, offset);
1132                 type = tvb_get_guint8(tvb, offset+1);
1133
1134                 /* Prevent loop for invalid crap in packet */
1135                 if (len == 0) {
1136                         if (tree)
1137                                 call_dissector(data_handle,
1138                                     tvb_new_subset(tvb, offset,
1139                                     -1, -1), pinfo, tree);
1140                         return;
1141                 }
1142
1143                 ett = ett_sna_nlp_opti_un;
1144                 if(type == 0x0d) ett = ett_sna_nlp_opti_0d;
1145                 if(type == 0x0e) ett = ett_sna_nlp_opti_0e;
1146                 if(type == 0x0f) ett = ett_sna_nlp_opti_0f;
1147                 if(type == 0x10) ett = ett_sna_nlp_opti_10;
1148                 if(type == 0x12) ett = ett_sna_nlp_opti_12;
1149                 if(type == 0x14) ett = ett_sna_nlp_opti_14;
1150                 if(type == 0x22) ett = ett_sna_nlp_opti_22;
1151                 if (tree) {
1152                         sub_item = proto_tree_add_text(tree, tvb,
1153                             offset, len << 2,
1154                             val_to_str(type, sna_nlp_opti_vals,
1155                             "Unknown Segment Type"));
1156                         sub_tree = proto_item_add_subtree(sub_item, ett);
1157                         proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_len,
1158                             tvb, offset, 1, len);
1159                         proto_tree_add_uint(sub_tree, hf_sna_nlp_opti_type,
1160                             tvb, offset+1, 1, type);
1161                 }
1162                 switch(type) {
1163                         case 0x0d:
1164                                 dissect_optional_0d(tvb_new_subset(tvb, offset,
1165                                     len << 2, -1), sub_tree);
1166                                 break;
1167                         case 0x0e:
1168                                 dissect_optional_0e(tvb_new_subset(tvb, offset,
1169                                     len << 2, -1), pinfo, sub_tree);
1170                                 break;
1171                         case 0x0f:
1172                                 dissect_optional_0f(tvb_new_subset(tvb, offset,
1173                                     len << 2, -1), pinfo, sub_tree);
1174                                 break;
1175                         case 0x10:
1176                                 dissect_optional_10(tvb_new_subset(tvb, offset,
1177                                     len << 2, -1), pinfo, sub_tree);
1178                                 break;
1179                         case 0x12:
1180                                 dissect_optional_12(tvb_new_subset(tvb, offset,
1181                                     len << 2, -1), sub_tree);
1182                                 break;
1183                         case 0x14:
1184                                 dissect_optional_14(tvb_new_subset(tvb, offset,
1185                                     len << 2, -1), pinfo, sub_tree);
1186                                 break;
1187                         case 0x22:
1188                                 dissect_optional_22(tvb_new_subset(tvb, offset,
1189                                     len << 2, -1), pinfo, sub_tree);
1190                                 break;
1191                         default:
1192                                 call_dissector(data_handle,
1193                                     tvb_new_subset(tvb, offset,
1194                                     len << 2, -1), pinfo, sub_tree);
1195                 }
1196                 offset += (len << 2);
1197         }
1198 }
1199
1200 static void
1201 dissect_nlp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1202     proto_tree *parent_tree)
1203 {
1204         proto_tree      *nlp_tree, *bf_tree;
1205         proto_item      *nlp_item, *bf_item, *h_item;
1206         guint8          nhdr_0, nhdr_1, nhdr_x, thdr_8, thdr_9, fid;
1207         guint32         thdr_len, thdr_dlf;
1208         guint16         subindex;
1209
1210         int index = 0, counter = 0;
1211
1212         nlp_tree = NULL;
1213         nlp_item = NULL;
1214
1215         nhdr_0 = tvb_get_guint8(tvb, index);
1216         nhdr_1 = tvb_get_guint8(tvb, index+1);
1217
1218         if (check_col(pinfo->cinfo, COL_INFO))
1219                 col_add_str(pinfo->cinfo, COL_INFO, "HPR NLP Packet");
1220
1221         if (tree) {
1222                 /* Don't bother setting length. We'll set it later after we
1223                  * find the lengths of NHDR */
1224                 nlp_item = proto_tree_add_item(tree, hf_sna_nlp_nhdr, tvb,
1225                     index, -1, FALSE);
1226                 nlp_tree = proto_item_add_subtree(nlp_item, ett_sna_nlp_nhdr);
1227
1228                 bf_item = proto_tree_add_uint(nlp_tree, hf_sna_nlp_nhdr_0, tvb,
1229                     index, 1, nhdr_0);
1230                 bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_nhdr_0);
1231
1232                 proto_tree_add_uint(bf_tree, hf_sna_nlp_sm, tvb, index, 1,
1233                     nhdr_0);
1234                 proto_tree_add_uint(bf_tree, hf_sna_nlp_tpf, tvb, index, 1,
1235                     nhdr_0);
1236
1237                 bf_item = proto_tree_add_uint(nlp_tree, hf_sna_nlp_nhdr_1, tvb,
1238                     index+1, 1, nhdr_1);
1239                 bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_nhdr_1);
1240
1241                 proto_tree_add_uint(bf_tree, hf_sna_nlp_ft, tvb,
1242                     index+1, 1, nhdr_1);
1243                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_tspi, tvb,
1244                     index+1, 1, nhdr_1);
1245                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_slowdn1, tvb,
1246                     index+1, 1, nhdr_1);
1247                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_slowdn2, tvb,
1248                     index+1, 1, nhdr_1);
1249         }
1250         /* ANR or FR lists */
1251
1252         index += 2;
1253         counter = 0;
1254
1255         if ((nhdr_0 & 0xe0) == 0xa0) {
1256                 do {
1257                         nhdr_x = tvb_get_guint8(tvb, index + counter);
1258                         counter ++;
1259                 } while (nhdr_x != 0xff);
1260                 if (tree)
1261                         h_item = proto_tree_add_item(nlp_tree,
1262                             hf_sna_nlp_fra, tvb, index, counter, FALSE);
1263                 index += counter;
1264                 if (tree)
1265                         proto_tree_add_text(nlp_tree, tvb, index, 1,
1266                             "Reserved");
1267                 index++;
1268
1269                 if (tree)
1270                         proto_item_set_len(nlp_item, index);
1271
1272                 if ((nhdr_1 & 0xf0) == 0x10) {
1273                         nhdr_x = tvb_get_guint8(tvb, index);
1274                         if (tree)
1275                                 proto_tree_add_uint(tree, hf_sna_nlp_frh,
1276                                     tvb, index, 1, nhdr_x);
1277                         index ++;
1278
1279                         if (tvb_offset_exists(tvb, index))
1280                                 call_dissector(data_handle,
1281                                         tvb_new_subset(tvb, index, -1, -1),
1282                                         pinfo, parent_tree);
1283                         return;
1284                 }
1285         }
1286         if ((nhdr_0 & 0xe0) == 0xc0) {
1287                 do {
1288                         nhdr_x = tvb_get_guint8(tvb, index + counter);
1289                         counter ++;
1290                 } while (nhdr_x != 0xff);
1291                 if (tree)
1292                         h_item = proto_tree_add_item(nlp_tree, hf_sna_nlp_anr,
1293                             tvb, index, counter, FALSE);
1294                 index += counter;
1295
1296                 if (tree)
1297                         proto_tree_add_text(nlp_tree, tvb, index, 1,
1298                             "Reserved");
1299                 index++;
1300
1301                 if (tree)
1302                         proto_item_set_len(nlp_item, index);
1303         }
1304
1305         thdr_8 = tvb_get_guint8(tvb, index+8);
1306         thdr_9 = tvb_get_guint8(tvb, index+9);
1307         thdr_len = tvb_get_ntohs(tvb, index+10);
1308         thdr_dlf = tvb_get_ntohl(tvb, index+12);
1309
1310         if (tree) {
1311                 nlp_item = proto_tree_add_item(tree, hf_sna_nlp_thdr, tvb,
1312                     index, thdr_len << 2, FALSE);
1313                 nlp_tree = proto_item_add_subtree(nlp_item, ett_sna_nlp_thdr);
1314
1315                 proto_tree_add_item(nlp_tree, hf_sna_nlp_tcid, tvb,
1316                     index, 8, FALSE);
1317                 bf_item = proto_tree_add_uint(nlp_tree, hf_sna_nlp_thdr_8, tvb,
1318                     index+8, 1, thdr_8);
1319                 bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_thdr_8);
1320
1321                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_setupi, tvb,
1322                     index+8, 1, thdr_8);
1323                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_somi, tvb, index+8,
1324                     1, thdr_8);
1325                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_eomi, tvb, index+8,
1326                     1, thdr_8);
1327                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_sri, tvb, index+8,
1328                     1, thdr_8);
1329                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_rasapi, tvb,
1330                     index+8, 1, thdr_8);
1331                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_retryi, tvb,
1332                     index+8, 1, thdr_8);
1333
1334                 bf_item = proto_tree_add_uint(nlp_tree, hf_sna_nlp_thdr_9, tvb,
1335                     index+9, 1, thdr_9);
1336                 bf_tree = proto_item_add_subtree(bf_item, ett_sna_nlp_thdr_9);
1337
1338                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_lmi, tvb, index+9,
1339                     1, thdr_9);
1340                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_cqfi, tvb, index+9,
1341                     1, thdr_9);
1342                 proto_tree_add_boolean(bf_tree, hf_sna_nlp_osi, tvb, index+9,
1343                     1, thdr_9);
1344
1345                 proto_tree_add_uint(nlp_tree, hf_sna_nlp_offset, tvb, index+10,
1346                     2, thdr_len);
1347                 proto_tree_add_uint(nlp_tree, hf_sna_nlp_dlf, tvb, index+12,
1348                     4, thdr_dlf);
1349                 proto_tree_add_item(nlp_tree, hf_sna_nlp_bsn, tvb, index+16,
1350                     4, FALSE);
1351         }
1352         subindex = 20;
1353
1354         if (((thdr_9 & 0x18) == 0x08) && ((thdr_len << 2) > subindex)) {
1355                 counter = tvb_get_guint8(tvb, index + subindex);
1356                 if (tvb_get_guint8(tvb, index+subindex+1) == 5)
1357                         dissect_control(tvb, index + subindex, counter+2, nlp_tree, 1, LT);
1358                 else
1359                         call_dissector(data_handle,
1360                             tvb_new_subset(tvb, index + subindex, counter+2,
1361                             -1), pinfo, nlp_tree);
1362
1363                 subindex += (counter+2);
1364         }
1365         if ((thdr_9 & 0x04) && ((thdr_len << 2) > subindex))
1366                 dissect_optional(
1367                     tvb_new_subset(tvb, index + subindex,
1368                     (thdr_len << 2) - subindex, -1),
1369                     pinfo, nlp_tree);
1370
1371         index += (thdr_len << 2);
1372         if (((thdr_8 & 0x20) == 0) && thdr_dlf) {
1373                 if (check_col(pinfo->cinfo, COL_INFO))
1374                         col_add_str(pinfo->cinfo, COL_INFO, "HPR Fragment");
1375                 if (tvb_offset_exists(tvb, index)) {
1376                         call_dissector(data_handle,
1377                             tvb_new_subset(tvb, index, -1, -1), pinfo,
1378                             parent_tree);
1379                 }
1380                 return;
1381         }
1382         if (tvb_offset_exists(tvb, index)) {
1383                 /* Transmission Header Format Identifier */
1384                 fid = hi_nibble(tvb_get_guint8(tvb, index));
1385                 if (fid == 5) /* Only FID5 allowed for HPR */
1386                         dissect_fid(tvb_new_subset(tvb, index, -1, -1), pinfo,
1387                             tree, parent_tree);
1388                 else {
1389                         if (tvb_get_ntohs(tvb, index+2) == 0x12ce) {
1390                                 /* Route Setup */
1391                                 if (check_col(pinfo->cinfo, COL_INFO))
1392                                         col_add_str(pinfo->cinfo, COL_INFO,
1393                                             "HPR Route Setup");
1394                                 dissect_gds(tvb_new_subset(tvb, index, -1, -1),
1395                                     pinfo, tree, parent_tree);
1396                         } else
1397                                 call_dissector(data_handle,
1398                                     tvb_new_subset(tvb, index, -1, -1),
1399                                     pinfo, parent_tree);
1400                 }
1401         }
1402 }
1403
1404 /* --------------------------------------------------------------------
1405  * Chapter 3 Exchange Identification (XID) Information Fields
1406  * --------------------------------------------------------------------
1407  */
1408
1409 static void
1410 dissect_xid1(tvbuff_t *tvb, proto_tree *tree)
1411 {
1412         if (!tree)
1413                 return;
1414
1415         proto_tree_add_text(tree, tvb, 0, 2, "Reserved");
1416
1417 }
1418
1419 static void
1420 dissect_xid2(tvbuff_t *tvb, proto_tree *tree)
1421 {
1422         guint           dlen, offset;
1423
1424         if (!tree)
1425                 return;
1426
1427         dlen = tvb_get_guint8(tvb, 0);
1428
1429         offset = dlen;
1430
1431         while (tvb_offset_exists(tvb, offset)) {
1432                 dlen = tvb_get_guint8(tvb, offset+1);
1433                 dissect_control(tvb, offset, dlen+2, tree, 0, KL);
1434                 offset += (dlen + 2);
1435         }
1436 }
1437
1438 static void
1439 dissect_xid3(tvbuff_t *tvb, proto_tree *tree)
1440 {
1441         proto_tree      *sub_tree;
1442         proto_item      *sub_ti = NULL;
1443         guint           val, dlen, offset;
1444
1445         if (!tree)
1446                 return;
1447
1448         proto_tree_add_text(tree, tvb, 0, 2, "Reserved");
1449
1450         val = tvb_get_ntohs(tvb, 2);
1451
1452         sub_ti = proto_tree_add_uint(tree, hf_sna_xid_3_8, tvb,
1453             2, 2, val);
1454         sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_3_8);
1455
1456         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_init_self, tvb, 2, 2,
1457             val);
1458         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_stand_bind, tvb, 2, 2,
1459             val);
1460         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_gener_bind, tvb, 2, 2,
1461             val);
1462         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_recve_bind, tvb, 2, 2,
1463             val);
1464         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_actpu, tvb, 2, 2, val);
1465         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_nwnode, tvb, 2, 2, val);
1466         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_cp, tvb, 2, 2, val);
1467         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_cpcp, tvb, 2, 2, val);
1468         proto_tree_add_uint(sub_tree, hf_sna_xid_3_state, tvb, 2, 2, val);
1469         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_nonact, tvb, 2, 2, val);
1470         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_cpchange, tvb, 2, 2,
1471             val);
1472
1473         val = tvb_get_guint8(tvb, 4);
1474
1475         sub_ti = proto_tree_add_uint(tree, hf_sna_xid_3_10, tvb,
1476             4, 1, val);
1477         sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_3_10);
1478
1479         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_asend_bind, tvb, 4, 1,
1480             val);
1481         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_arecv_bind, tvb, 4, 1,
1482             val);
1483         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_quiesce, tvb, 4, 1, val);
1484         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_pucap, tvb, 4, 1, val);
1485         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_pbn, tvb, 4, 1, val);
1486         proto_tree_add_uint(sub_tree, hf_sna_xid_3_pacing, tvb, 4, 1, val);
1487
1488         val = tvb_get_guint8(tvb, 5);
1489
1490         sub_ti = proto_tree_add_uint(tree, hf_sna_xid_3_11, tvb,
1491             5, 1, val);
1492         sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_3_11);
1493
1494         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_tgshare, tvb, 5, 1, val);
1495         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_dedsvc, tvb, 5, 1, val);
1496
1497         val = tvb_get_guint8(tvb, 6);
1498
1499         sub_ti = proto_tree_add_item(tree, hf_sna_xid_3_12, tvb,
1500             6, 1, FALSE);
1501         sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_3_12);
1502
1503         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_negcsup, tvb, 6, 1, val);
1504         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_negcomp, tvb, 6, 1, val);
1505
1506         proto_tree_add_text(tree, tvb, 7, 2, "Reserved");
1507
1508         val = tvb_get_guint8(tvb, 9);
1509
1510         sub_ti = proto_tree_add_item(tree, hf_sna_xid_3_15, tvb,
1511             9, 1, FALSE);
1512         sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_3_15);
1513
1514         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_partg, tvb, 9, 1, val);
1515         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_dlur, tvb, 9, 1, val);
1516         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_dlus, tvb, 9, 1, val);
1517         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_exbn, tvb, 9, 1, val);
1518         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_genodai, tvb, 9, 1, val);
1519         proto_tree_add_uint(sub_tree, hf_sna_xid_3_branch, tvb, 9, 1, val);
1520         proto_tree_add_boolean(sub_tree, hf_sna_xid_3_brnn, tvb, 9, 1, val);
1521
1522         proto_tree_add_item(tree, hf_sna_xid_3_tg, tvb, 10, 1, FALSE);
1523         proto_tree_add_item(tree, hf_sna_xid_3_dlc, tvb, 11, 1, FALSE);
1524
1525         dlen = tvb_get_guint8(tvb, 12);
1526
1527         proto_tree_add_uint(tree, hf_sna_xid_3_dlen, tvb, 12, 1, dlen);
1528
1529         /* FIXME: DLC Dependent Data Go Here */
1530
1531         offset = 12 + dlen;
1532
1533         while (tvb_offset_exists(tvb, offset)) {
1534                 dlen = tvb_get_guint8(tvb, offset+1);
1535                 dissect_control(tvb, offset, dlen+2, tree, 0, KL);
1536                 offset += (dlen+2);
1537         }
1538 }
1539
1540 static void
1541 dissect_xid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1542     proto_tree *parent_tree)
1543 {
1544         proto_tree      *sub_tree;
1545         proto_item      *sub_ti = NULL;
1546         int             format, type, len;
1547         guint32         id;
1548
1549         len = tvb_get_guint8(tvb, 1);
1550         type = tvb_get_guint8(tvb, 0);
1551         id = tvb_get_ntohl(tvb, 2);
1552         format = hi_nibble(type);
1553
1554         /* Summary information */
1555         if (check_col(pinfo->cinfo, COL_INFO))
1556                 col_add_fstr(pinfo->cinfo, COL_INFO,
1557                     "SNA XID Format:%d Type:%s", format,
1558                     val_to_str(lo_nibble(type), sna_xid_type_vals,
1559                     "Unknown Type"));
1560
1561         if (tree) {
1562                 sub_ti = proto_tree_add_item(tree, hf_sna_xid_0, tvb,
1563                     0, 1, FALSE);
1564                 sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_0);
1565
1566                 proto_tree_add_uint(sub_tree, hf_sna_xid_format, tvb, 0, 1,
1567                     type);
1568                 proto_tree_add_uint(sub_tree, hf_sna_xid_type, tvb, 0, 1,
1569                     type);
1570
1571                 proto_tree_add_uint(tree, hf_sna_xid_len, tvb, 1, 1, len);
1572
1573                 sub_ti = proto_tree_add_item(tree, hf_sna_xid_id, tvb,
1574                     2, 4, FALSE);
1575                 sub_tree = proto_item_add_subtree(sub_ti, ett_sna_xid_id);
1576
1577                 proto_tree_add_uint(sub_tree, hf_sna_xid_idblock, tvb, 2, 4,
1578                     id);
1579                 proto_tree_add_uint(sub_tree, hf_sna_xid_idnum, tvb, 2, 4,
1580                     id);
1581
1582                 switch(format) {
1583                         case 0:
1584                                 break;
1585                         case 1:
1586                                 dissect_xid1(tvb_new_subset(tvb, 6, len-6, -1),
1587                                     tree);
1588                                 break;
1589                         case 2:
1590                                 dissect_xid2(tvb_new_subset(tvb, 6, len-6, -1),
1591                                     tree);
1592                                 break;
1593                         case 3:
1594                                 dissect_xid3(tvb_new_subset(tvb, 6, len-6, -1),
1595                                     tree);
1596                                 break;
1597                         default:
1598                                 /* external standards organizations */
1599                                 call_dissector(data_handle,
1600                                     tvb_new_subset(tvb, 6, len-6, -1),
1601                                     pinfo, tree);
1602                 }
1603         }
1604
1605         if (format == 0)
1606                 len = 6;
1607
1608         if (tvb_offset_exists(tvb, len))
1609                 call_dissector(data_handle,
1610                     tvb_new_subset(tvb, len, -1, -1), pinfo, parent_tree);
1611 }
1612
1613 /* --------------------------------------------------------------------
1614  * Chapter 4 Transmission Headers (THs)
1615  * --------------------------------------------------------------------
1616  */
1617
1618 #define RH_LEN  3
1619
1620 static unsigned int
1621 mpf_value(guint8 th_byte)
1622 {
1623         return (th_byte & 0x0c) >> 2;
1624 }
1625
1626 #define FIRST_FRAG_NUMBER       0
1627 #define MIDDLE_FRAG_NUMBER      1
1628 #define LAST_FRAG_NUMBER        2
1629
1630 /* FID2 is defragged by sequence. The weird thing is that we have neither
1631  * absolute sequence numbers, nor byte offets. Other FIDs have byte offsets
1632  * (the DCF field), but not FID2. The only thing we have to go with is "FIRST",
1633  * "MIDDLE", or "LAST". If the BIU is split into 3 frames, then everything is
1634  * fine, * "FIRST", "MIDDLE", and "LAST" map nicely onto frag-number 0, 1,
1635  * and 2. However, if the BIU is split into 2 frames, then we only have
1636  * "FIRST" and "LAST", and the mapping *should* be frag-number 0 and 1,
1637  * *NOT* 0 and 2.
1638  *
1639  * The SNA docs say "FID2 PIUs cannot be blocked because there is no DCF in the
1640  * TH format for deblocking" (note on Figure 4-2 in the IBM SNA documention,
1641  * see the FTP URL in the comment near the top of this file). I *think*
1642  * this means that the fragmented frames cannot arrive out of order.
1643  * Well, I *want* it to mean this, because w/o this limitation, if you
1644  * get a "FIRST" frame and a "LAST" frame, how long should you wait to
1645  * see if a "MIDDLE" frame every arrives????? Thus, if frames *have* to
1646  * arrive in order, then we're saved.
1647  *
1648  * The problem then boils down to figuring out if "LAST" means frag-number 1
1649  * (in the case of a BIU split into 2 frames) or frag-number 2
1650  * (in the case of a BIU split into 3 frames).
1651  *
1652  * Assuming fragmented FID2 BIU frames *do* arrive in order, the obvious
1653  * way to handle the mapping of "LAST" to either frag-number 1 or
1654  * frag-number 2 is to keep a hash which tracks the frames seen, etc.
1655  * This consumes resources. A trickier way, but a way which works, is to
1656  * always map the "LAST" BIU segment to frag-number 2. Here's the trickery:
1657  * if we add frag-number 2, which we know to be the "LAST" BIU segment,
1658  * and the reassembly code tells us that the the BIU is still not reassmebled,
1659  * then, owing to the, ahem, /fact/, that fragmented BIU segments arrive
1660  * in order :), we know that 1) "FIRST" did come, and 2) there's no "MIDDLE",
1661  * because this BIU was fragmented into 2 frames, not 3. So, we'll be
1662  * tricky and add a zero-length "MIDDLE" BIU frame (i.e, frag-number 1)
1663  * to complete the reassembly.
1664  */
1665 static tvbuff_t*
1666 defragment_by_sequence(packet_info *pinfo, tvbuff_t *tvb, int offset, int mpf,
1667     int id)
1668 {
1669         fragment_data *fd_head;
1670         int frag_number = -1;
1671         int more_frags = TRUE;
1672         tvbuff_t *rh_tvb = NULL;
1673         gint frag_len;
1674
1675         /* Determine frag_number and more_frags */
1676         switch(mpf) {
1677                 case MPF_WHOLE_BIU:
1678                         /* nothing */
1679                         break;
1680                 case MPF_FIRST_SEGMENT:
1681                         frag_number = FIRST_FRAG_NUMBER;
1682                         break;
1683                 case MPF_MIDDLE_SEGMENT:
1684                         frag_number = MIDDLE_FRAG_NUMBER;
1685                         break;
1686                 case MPF_LAST_SEGMENT:
1687                         frag_number = LAST_FRAG_NUMBER;
1688                         more_frags = FALSE;
1689                         break;
1690                 default:
1691                         g_assert_not_reached();
1692         }
1693
1694         /* If sna_defragment is on, and this is a fragment.. */
1695         if (frag_number > -1) {
1696                 /* XXX - check length ??? */
1697                 frag_len = tvb_reported_length_remaining(tvb, offset);
1698                 if (tvb_bytes_exist(tvb, offset, frag_len)) {
1699                         fd_head = fragment_add_seq(tvb, offset, pinfo, id,
1700                             sna_fragment_table, frag_number, frag_len,
1701                             more_frags);
1702
1703                         /* We added the LAST segment and reassembly didn't
1704                          * complete. Insert a zero-length MIDDLE segment to
1705                          * turn a 2-frame BIU-fragmentation into a 3-frame
1706                          * BIU-fragmentation (empty middle frag).
1707                          * See above long comment about this trickery. */
1708
1709                         if (mpf == MPF_LAST_SEGMENT && !fd_head) {
1710                                 fd_head = fragment_add_seq(tvb, offset, pinfo,
1711                                     id, sna_fragment_table,
1712                                     MIDDLE_FRAG_NUMBER, 0, TRUE);
1713                         }
1714
1715                         if (fd_head != NULL) {
1716                                 /* We have the complete reassembled payload. */
1717                                 rh_tvb = tvb_new_real_data(fd_head->data,
1718                                     fd_head->len, fd_head->len);
1719
1720                                 /* Add the tvbuff to the chain of tvbuffs
1721                                  * so that it will get cleaned up too. */
1722                                 tvb_set_child_real_data_tvbuff(tvb, rh_tvb);
1723
1724                                 /* Add the defragmented data to the data
1725                                  * source list. */
1726                                 add_new_data_source(pinfo, rh_tvb,
1727                                     "Reassembled SNA BIU");
1728                         }
1729                 }
1730         }
1731         return rh_tvb;
1732 }
1733
1734 #define SNA_FID01_ADDR_LEN      2
1735
1736 /* FID Types 0 and 1 */
1737 static int
1738 dissect_fid0_1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1739 {
1740         proto_tree      *bf_tree;
1741         proto_item      *bf_item;
1742         guint8          th_0;
1743         const guint8    *ptr;
1744
1745         const int bytes_in_header = 10;
1746
1747         if (tree) {
1748                 /* Byte 0 */
1749                 th_0 = tvb_get_guint8(tvb, 0);
1750                 bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1,
1751                     th_0);
1752                 bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1753
1754                 proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
1755                 proto_tree_add_uint(bf_tree, hf_sna_th_mpf, tvb, 0, 1, th_0);
1756                 proto_tree_add_uint(bf_tree, hf_sna_th_efi, tvb, 0, 1, th_0);
1757
1758                 /* Byte 1 */
1759                 proto_tree_add_text(tree, tvb, 1, 1, "Reserved");
1760
1761                 /* Bytes 2-3 */
1762                 proto_tree_add_item(tree, hf_sna_th_daf, tvb, 2, 2, FALSE);
1763         }
1764
1765         /* Set DST addr */
1766         ptr = tvb_get_ptr(tvb, 2, SNA_FID01_ADDR_LEN);
1767         SET_ADDRESS(&pinfo->net_dst, AT_SNA, SNA_FID01_ADDR_LEN, ptr);
1768         SET_ADDRESS(&pinfo->dst, AT_SNA, SNA_FID01_ADDR_LEN, ptr);
1769
1770         if (tree)
1771                 proto_tree_add_item(tree, hf_sna_th_oaf, tvb, 4, 2, FALSE);
1772
1773         /* Set SRC addr */
1774         ptr = tvb_get_ptr(tvb, 4, SNA_FID01_ADDR_LEN);
1775         SET_ADDRESS(&pinfo->net_src, AT_SNA, SNA_FID01_ADDR_LEN, ptr);
1776         SET_ADDRESS(&pinfo->src, AT_SNA, SNA_FID01_ADDR_LEN, ptr);
1777
1778         /* If we're not filling a proto_tree, return now */
1779         if (tree)
1780                 return bytes_in_header;
1781
1782         proto_tree_add_item(tree, hf_sna_th_snf, tvb, 6, 2, FALSE);
1783         proto_tree_add_item(tree, hf_sna_th_dcf, tvb, 8, 2, FALSE);
1784
1785         return bytes_in_header;
1786 }
1787
1788 #define SNA_FID2_ADDR_LEN       1
1789
1790 /* FID Type 2 */
1791 static int
1792 dissect_fid2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1793         tvbuff_t **rh_tvb_ptr, next_dissection_t *continue_dissecting)
1794 {
1795         proto_tree      *bf_tree;
1796         proto_item      *bf_item;
1797         guint8          th_0=0, daf=0, oaf=0;
1798         const guint8    *ptr;
1799         unsigned int    mpf, id;
1800
1801         const int bytes_in_header = 6;
1802
1803         th_0 = tvb_get_guint8(tvb, 0);
1804         mpf = mpf_value(th_0);
1805
1806         if (tree) {
1807                 daf = tvb_get_guint8(tvb, 2);
1808                 oaf = tvb_get_guint8(tvb, 3);
1809
1810                 /* Byte 0 */
1811                 bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1,
1812                     th_0);
1813                 bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1814
1815                 proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
1816                 proto_tree_add_uint(bf_tree, hf_sna_th_mpf, tvb, 0, 1, th_0);
1817                 proto_tree_add_uint(bf_tree, hf_sna_th_odai,tvb, 0, 1, th_0);
1818                 proto_tree_add_uint(bf_tree, hf_sna_th_efi, tvb, 0, 1, th_0);
1819
1820
1821                 /* Byte 1 */
1822                 proto_tree_add_text(tree, tvb, 1, 1, "Reserved");
1823
1824                 /* Byte 2 */
1825                 proto_tree_add_uint_format(tree, hf_sna_th_daf, tvb, 2, 1, daf,
1826                     "Destination Address Field: 0x%02x", daf);
1827         }
1828
1829         /* Set DST addr */
1830         ptr = tvb_get_ptr(tvb, 2, SNA_FID2_ADDR_LEN);
1831         SET_ADDRESS(&pinfo->net_dst, AT_SNA, SNA_FID2_ADDR_LEN, ptr);
1832         SET_ADDRESS(&pinfo->dst, AT_SNA, SNA_FID2_ADDR_LEN, ptr);
1833
1834         if (tree) {
1835                 /* Byte 3 */
1836                 proto_tree_add_uint_format(tree, hf_sna_th_oaf, tvb, 3, 1, oaf,
1837                     "Origin Address Field: 0x%02x", oaf);
1838         }
1839
1840         /* Set SRC addr */
1841         ptr = tvb_get_ptr(tvb, 3, SNA_FID2_ADDR_LEN);
1842         SET_ADDRESS(&pinfo->net_src, AT_SNA, SNA_FID2_ADDR_LEN, ptr);
1843         SET_ADDRESS(&pinfo->src, AT_SNA, SNA_FID2_ADDR_LEN, ptr);
1844
1845         id = tvb_get_ntohs(tvb, 4);
1846         if (tree)
1847                 proto_tree_add_uint(tree, hf_sna_th_snf, tvb, 4, 2, id);
1848
1849         if (mpf != MPF_WHOLE_BIU && !sna_defragment) {
1850                 if (mpf == MPF_FIRST_SEGMENT) {
1851                         *continue_dissecting = rh_only;
1852                 } else {
1853                         *continue_dissecting = stop_here;
1854                 }
1855
1856         }
1857         else if (sna_defragment) {
1858                 *rh_tvb_ptr = defragment_by_sequence(pinfo, tvb,
1859                     bytes_in_header, mpf, id);
1860         }
1861
1862         return bytes_in_header;
1863 }
1864
1865 /* FID Type 3 */
1866 static int
1867 dissect_fid3(tvbuff_t *tvb, proto_tree *tree)
1868 {
1869         proto_tree      *bf_tree;
1870         proto_item      *bf_item;
1871         guint8          th_0;
1872
1873         const int bytes_in_header = 2;
1874
1875         /* If we're not filling a proto_tree, return now */
1876         if (!tree)
1877                 return bytes_in_header;
1878
1879         th_0 = tvb_get_guint8(tvb, 0);
1880
1881         /* Create the bitfield tree */
1882         bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1, th_0);
1883         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1884
1885         proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
1886         proto_tree_add_uint(bf_tree, hf_sna_th_mpf, tvb, 0, 1, th_0);
1887         proto_tree_add_uint(bf_tree, hf_sna_th_efi, tvb, 0, 1, th_0);
1888
1889         proto_tree_add_item(tree, hf_sna_th_lsid, tvb, 1, 1, FALSE);
1890
1891         return bytes_in_header;
1892 }
1893
1894 static int
1895 dissect_fid4(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1896 {
1897         proto_tree      *bf_tree;
1898         proto_item      *bf_item;
1899         int             offset = 0;
1900         guint8          th_byte, mft;
1901         guint16         th_word;
1902         guint16         def, oef;
1903         guint32         dsaf, osaf;
1904         static struct sna_fid_type_4_addr src, dst;
1905
1906         const int bytes_in_header = 26;
1907
1908         /* If we're not filling a proto_tree, return now */
1909         if (!tree)
1910                 return bytes_in_header;
1911
1912         th_byte = tvb_get_guint8(tvb, offset);
1913
1914         /* Create the bitfield tree */
1915         bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, offset,
1916             1, th_byte);
1917         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1918
1919         /* Byte 0 */
1920         proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb,
1921             offset, 1, th_byte);
1922         proto_tree_add_uint(bf_tree, hf_sna_th_tg_sweep, tvb,
1923             offset, 1, th_byte);
1924         proto_tree_add_uint(bf_tree, hf_sna_th_er_vr_supp_ind, tvb,
1925             offset, 1, th_byte);
1926         proto_tree_add_uint(bf_tree, hf_sna_th_vr_pac_cnt_ind, tvb,
1927             offset, 1, th_byte);
1928         proto_tree_add_uint(bf_tree, hf_sna_th_ntwk_prty, tvb,
1929             offset, 1, th_byte);
1930
1931         offset += 1;
1932         th_byte = tvb_get_guint8(tvb, offset);
1933
1934         /* Create the bitfield tree */
1935         bf_item = proto_tree_add_text(tree, tvb, offset, 1,
1936             "Transmision Header Byte 1");
1937         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1938
1939         /* Byte 1 */
1940         proto_tree_add_uint(bf_tree, hf_sna_th_tgsf, tvb, offset, 1,
1941             th_byte);
1942         proto_tree_add_boolean(bf_tree, hf_sna_th_mft, tvb, offset, 1,
1943             th_byte);
1944         proto_tree_add_uint(bf_tree, hf_sna_th_piubf, tvb, offset, 1,
1945             th_byte);
1946
1947         mft = th_byte & 0x04;
1948         offset += 1;
1949         th_byte = tvb_get_guint8(tvb, offset);
1950
1951         /* Create the bitfield tree */
1952         bf_item = proto_tree_add_text(tree, tvb, offset, 1,
1953             "Transmision Header Byte 2");
1954         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1955
1956         /* Byte 2 */
1957         if (mft) {
1958                 proto_tree_add_uint(bf_tree, hf_sna_th_nlpoi, tvb,
1959                     offset, 1, th_byte);
1960                 proto_tree_add_uint(bf_tree, hf_sna_th_nlp_cp, tvb,
1961                     offset, 1, th_byte);
1962         } else {
1963                 proto_tree_add_uint(bf_tree, hf_sna_th_iern, tvb,
1964                     offset, 1, th_byte);
1965         }
1966         proto_tree_add_uint(bf_tree, hf_sna_th_ern, tvb, offset, 1,
1967             th_byte);
1968
1969         offset += 1;
1970         th_byte = tvb_get_guint8(tvb, offset);
1971
1972         /* Create the bitfield tree */
1973         bf_item = proto_tree_add_text(tree, tvb, offset, 1,
1974             "Transmision Header Byte 3");
1975         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1976
1977         /* Byte 3 */
1978         proto_tree_add_uint(bf_tree, hf_sna_th_vrn, tvb, offset, 1,
1979             th_byte);
1980         proto_tree_add_uint(bf_tree, hf_sna_th_tpf, tvb, offset, 1,
1981             th_byte);
1982
1983         offset += 1;
1984         th_word = tvb_get_ntohs(tvb, offset);
1985
1986         /* Create the bitfield tree */
1987         bf_item = proto_tree_add_text(tree, tvb, offset, 2,
1988             "Transmision Header Bytes 4-5");
1989         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
1990
1991         /* Bytes 4-5 */
1992         proto_tree_add_uint(bf_tree, hf_sna_th_vr_cwi, tvb,
1993             offset, 2, th_word);
1994         proto_tree_add_boolean(bf_tree, hf_sna_th_tg_nonfifo_ind, tvb,
1995             offset, 2, th_word);
1996         proto_tree_add_uint(bf_tree, hf_sna_th_vr_sqti, tvb,
1997             offset, 2, th_word);
1998
1999         /* I'm not sure about byte-order on this one... */
2000         proto_tree_add_uint(bf_tree, hf_sna_th_tg_snf, tvb,
2001             offset, 2, th_word);
2002
2003         offset += 2;
2004         th_word = tvb_get_ntohs(tvb, offset);
2005
2006         /* Create the bitfield tree */
2007         bf_item = proto_tree_add_text(tree, tvb, offset, 2,
2008             "Transmision Header Bytes 6-7");
2009         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
2010
2011         /* Bytes 6-7 */
2012         proto_tree_add_boolean(bf_tree, hf_sna_th_vrprq, tvb, offset,
2013             2, th_word);
2014         proto_tree_add_boolean(bf_tree, hf_sna_th_vrprs, tvb, offset,
2015             2, th_word);
2016         proto_tree_add_uint(bf_tree, hf_sna_th_vr_cwri, tvb, offset,
2017             2, th_word);
2018         proto_tree_add_boolean(bf_tree, hf_sna_th_vr_rwi, tvb, offset,
2019             2, th_word);
2020
2021         /* I'm not sure about byte-order on this one... */
2022         proto_tree_add_uint(bf_tree, hf_sna_th_vr_snf_send, tvb,
2023             offset, 2, th_word);
2024
2025         offset += 2;
2026
2027         dsaf = tvb_get_ntohl(tvb, 8);
2028         /* Bytes 8-11 */
2029         proto_tree_add_uint(tree, hf_sna_th_dsaf, tvb, offset, 4, dsaf);
2030
2031         offset += 4;
2032
2033         osaf = tvb_get_ntohl(tvb, 12);
2034         /* Bytes 12-15 */
2035         proto_tree_add_uint(tree, hf_sna_th_osaf, tvb, offset, 4, osaf);
2036
2037         offset += 4;
2038         th_byte = tvb_get_guint8(tvb, offset);
2039
2040         /* Create the bitfield tree */
2041         bf_item = proto_tree_add_text(tree, tvb, offset, 2,
2042             "Transmision Header Byte 16");
2043         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
2044
2045         /* Byte 16 */
2046         proto_tree_add_boolean(tree, hf_sna_th_snai, tvb, offset, 1, th_byte);
2047
2048         /* We luck out here because in their infinite wisdom the SNA
2049          * architects placed the MPF and EFI fields in the same bitfield
2050          * locations, even though for FID4 they're not in byte 0.
2051          * Thank you IBM! */
2052         proto_tree_add_uint(tree, hf_sna_th_mpf, tvb, offset, 1, th_byte);
2053         proto_tree_add_uint(tree, hf_sna_th_efi, tvb, offset, 1, th_byte);
2054
2055         offset += 2;
2056         /* 1 for byte 16, 1 for byte 17 which is reserved */
2057
2058         def = tvb_get_ntohs(tvb, 18);
2059         /* Bytes 18-25 */
2060         proto_tree_add_uint(tree, hf_sna_th_def, tvb, offset, 2, def);
2061
2062         /* Addresses in FID 4 are discontiguous, sigh */
2063         dst.saf = dsaf;
2064         dst.ef = def;
2065         SET_ADDRESS(&pinfo->net_dst, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
2066             (guint8* )&dst);
2067         SET_ADDRESS(&pinfo->dst, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
2068             (guint8 *)&dst);
2069
2070         oef = tvb_get_ntohs(tvb, 20);
2071         proto_tree_add_uint(tree, hf_sna_th_oef, tvb, offset+2, 2, oef);
2072
2073         /* Addresses in FID 4 are discontiguous, sigh */
2074         src.saf = osaf;
2075         src.ef = oef;
2076         SET_ADDRESS(&pinfo->net_src, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
2077             (guint8 *)&src);
2078         SET_ADDRESS(&pinfo->src, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
2079             (guint8 *)&src);
2080
2081         proto_tree_add_item(tree, hf_sna_th_snf, tvb, offset+4, 2, FALSE);
2082         proto_tree_add_item(tree, hf_sna_th_dcf, tvb, offset+6, 2, FALSE);
2083
2084         return bytes_in_header;
2085 }
2086
2087 /* FID Type 5 */
2088 static int
2089 dissect_fid5(tvbuff_t *tvb, proto_tree *tree)
2090 {
2091         proto_tree      *bf_tree;
2092         proto_item      *bf_item;
2093         guint8          th_0;
2094
2095         const int bytes_in_header = 12;
2096
2097         /* If we're not filling a proto_tree, return now */
2098         if (!tree)
2099                 return bytes_in_header;
2100
2101         th_0 = tvb_get_guint8(tvb, 0);
2102
2103         /* Create the bitfield tree */
2104         bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1, th_0);
2105         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
2106
2107         proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
2108         proto_tree_add_uint(bf_tree, hf_sna_th_mpf, tvb, 0, 1, th_0);
2109         proto_tree_add_uint(bf_tree, hf_sna_th_efi, tvb, 0, 1, th_0);
2110
2111         proto_tree_add_text(tree, tvb, 1, 1, "Reserved");
2112         proto_tree_add_item(tree, hf_sna_th_snf, tvb, 2, 2, FALSE);
2113
2114         proto_tree_add_item(tree, hf_sna_th_sa, tvb, 4, 8, FALSE);
2115
2116         return bytes_in_header;
2117
2118 }
2119
2120 /* FID Type f */
2121 static int
2122 dissect_fidf(tvbuff_t *tvb, proto_tree *tree)
2123 {
2124         proto_tree      *bf_tree;
2125         proto_item      *bf_item;
2126         guint8          th_0;
2127
2128         const int bytes_in_header = 26;
2129
2130         /* If we're not filling a proto_tree, return now */
2131         if (!tree)
2132                 return bytes_in_header;
2133
2134         th_0 = tvb_get_guint8(tvb, 0);
2135
2136         /* Create the bitfield tree */
2137         bf_item = proto_tree_add_uint(tree, hf_sna_th_0, tvb, 0, 1, th_0);
2138         bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
2139
2140         proto_tree_add_uint(bf_tree, hf_sna_th_fid, tvb, 0, 1, th_0);
2141         proto_tree_add_text(tree, tvb, 1, 1, "Reserved");
2142
2143         proto_tree_add_item(tree, hf_sna_th_cmd_fmt, tvb,  2, 1, FALSE);
2144         proto_tree_add_item(tree, hf_sna_th_cmd_type, tvb, 3, 1, FALSE);
2145         proto_tree_add_item(tree, hf_sna_th_cmd_sn, tvb,   4, 2, FALSE);
2146
2147         /* Yup, bytes 6-23 are reserved! */
2148         proto_tree_add_text(tree, tvb, 6, 18, "Reserved");
2149
2150         proto_tree_add_item(tree, hf_sna_th_dcf, tvb, 24, 2, FALSE);
2151
2152         return bytes_in_header;
2153 }
2154
2155 static void
2156 dissect_fid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
2157     proto_tree *parent_tree)
2158 {
2159
2160         proto_tree      *th_tree = NULL, *rh_tree = NULL;
2161         proto_item      *th_ti = NULL, *rh_ti = NULL;
2162         guint8          th_fid;
2163         int             th_header_len = 0;
2164         int             offset, rh_offset;
2165         tvbuff_t        *rh_tvb = NULL;
2166         next_dissection_t continue_dissecting = everything;
2167
2168         /* Transmission Header Format Identifier */
2169         th_fid = hi_nibble(tvb_get_guint8(tvb, 0));
2170
2171         /* Summary information */
2172         if (check_col(pinfo->cinfo, COL_INFO))
2173                 col_add_str(pinfo->cinfo, COL_INFO,
2174                     val_to_str(th_fid, sna_th_fid_vals, "Unknown FID: %01x"));
2175
2176         if (tree) {
2177                 /* --- TH --- */
2178                 /* Don't bother setting length. We'll set it later after we
2179                  * find the length of TH */
2180                 th_ti = proto_tree_add_item(tree, hf_sna_th, tvb,  0, -1,
2181                     FALSE);
2182                 th_tree = proto_item_add_subtree(th_ti, ett_sna_th);
2183         }
2184
2185         /* Get size of TH */
2186         switch(th_fid) {
2187                 case 0x0:
2188                 case 0x1:
2189                         th_header_len = dissect_fid0_1(tvb, pinfo, th_tree);
2190                         break;
2191                 case 0x2:
2192                         th_header_len = dissect_fid2(tvb, pinfo, th_tree,
2193                             &rh_tvb, &continue_dissecting);
2194                         break;
2195                 case 0x3:
2196                         th_header_len = dissect_fid3(tvb, th_tree);
2197                         break;
2198                 case 0x4:
2199                         th_header_len = dissect_fid4(tvb, pinfo, th_tree);
2200                         break;
2201                 case 0x5:
2202                         th_header_len = dissect_fid5(tvb, th_tree);
2203                         break;
2204                 case 0xf:
2205                         th_header_len = dissect_fidf(tvb, th_tree);
2206                         break;
2207                 default:
2208                         call_dissector(data_handle,
2209                             tvb_new_subset(tvb, 1, -1, -1), pinfo, parent_tree);
2210                         return;
2211         }
2212
2213         offset = th_header_len;
2214
2215         /* Short-circuit ? */
2216         if (continue_dissecting == stop_here) {
2217                 if (tree) {
2218                         proto_tree_add_text(tree, tvb, offset, -1,
2219                             "BIU segment data");
2220                 }
2221                 return;
2222         }
2223
2224         /* If the FID dissector function didn't create an rh_tvb, then we just
2225          * use the rest of our tvbuff as the rh_tvb. */
2226         if (!rh_tvb)
2227                 rh_tvb = tvb_new_subset(tvb, offset, -1, -1);
2228         rh_offset = 0;
2229
2230         /* Process the rest of the SNA packet, starting with RH */
2231         if (tree) {
2232                 proto_item_set_len(th_ti, th_header_len);
2233
2234                 /* --- RH --- */
2235                 rh_ti = proto_tree_add_item(tree, hf_sna_rh, rh_tvb, rh_offset,
2236                     RH_LEN, FALSE);
2237                 rh_tree = proto_item_add_subtree(rh_ti, ett_sna_rh);
2238                 dissect_rh(rh_tvb, rh_offset, rh_tree);
2239         }
2240
2241         rh_offset += RH_LEN;
2242
2243         if (tvb_offset_exists(rh_tvb, rh_offset)) {
2244                 /* Short-circuit ? */
2245                 if (continue_dissecting == rh_only) {
2246                         if (tree)
2247                                 proto_tree_add_text(tree, rh_tvb, rh_offset, -1,
2248                                     "BIU segment data");
2249                         return;
2250                 }
2251
2252                 call_dissector(data_handle,
2253                     tvb_new_subset(rh_tvb, rh_offset, -1, -1),
2254                     pinfo, parent_tree);
2255         }
2256 }
2257
2258 /* --------------------------------------------------------------------
2259  * Chapter 5 Request/Response Headers (RHs)
2260  * --------------------------------------------------------------------
2261  */
2262
2263 static void
2264 dissect_rh(tvbuff_t *tvb, int offset, proto_tree *tree)
2265 {
2266         proto_tree      *bf_tree;
2267         proto_item      *bf_item;
2268         gboolean        is_response;
2269         guint8          rh_0, rh_1, rh_2;
2270
2271         if (!tree)
2272                 return;
2273
2274         /* Create the bitfield tree for byte 0*/
2275         rh_0 = tvb_get_guint8(tvb, offset);
2276         is_response = (rh_0 & 0x80);
2277
2278         bf_item = proto_tree_add_uint(tree, hf_sna_rh_0, tvb, offset, 1, rh_0);
2279         bf_tree = proto_item_add_subtree(bf_item, ett_sna_rh_0);
2280
2281         proto_tree_add_uint(bf_tree, hf_sna_rh_rri, tvb, offset, 1, rh_0);
2282         proto_tree_add_uint(bf_tree, hf_sna_rh_ru_category, tvb, offset, 1,
2283             rh_0);
2284         proto_tree_add_boolean(bf_tree, hf_sna_rh_fi, tvb, offset, 1, rh_0);
2285         proto_tree_add_boolean(bf_tree, hf_sna_rh_sdi, tvb, offset, 1, rh_0);
2286         proto_tree_add_boolean(bf_tree, hf_sna_rh_bci, tvb, offset, 1, rh_0);
2287         proto_tree_add_boolean(bf_tree, hf_sna_rh_eci, tvb, offset, 1, rh_0);
2288
2289         offset += 1;
2290         rh_1 = tvb_get_guint8(tvb, offset);
2291
2292         /* Create the bitfield tree for byte 1*/
2293         bf_item = proto_tree_add_uint(tree, hf_sna_rh_1, tvb, offset, 1, rh_1);
2294         bf_tree = proto_item_add_subtree(bf_item, ett_sna_rh_1);
2295
2296         proto_tree_add_boolean(bf_tree, hf_sna_rh_dr1, tvb,  offset, 1, rh_1);
2297
2298         if (!is_response)
2299                 proto_tree_add_boolean(bf_tree, hf_sna_rh_lcci, tvb, offset, 1,
2300                     rh_1);
2301
2302         proto_tree_add_boolean(bf_tree, hf_sna_rh_dr2, tvb,  offset, 1, rh_1);
2303
2304         if (is_response) {
2305                 proto_tree_add_boolean(bf_tree, hf_sna_rh_rti, tvb,  offset, 1,
2306                     rh_1);
2307         } else {
2308                 proto_tree_add_boolean(bf_tree, hf_sna_rh_eri, tvb,  offset, 1,
2309                     rh_1);
2310                 proto_tree_add_boolean(bf_tree, hf_sna_rh_rlwi, tvb, offset, 1,
2311                     rh_1);
2312         }
2313
2314         proto_tree_add_boolean(bf_tree, hf_sna_rh_qri, tvb, offset, 1, rh_1);
2315         proto_tree_add_boolean(bf_tree, hf_sna_rh_pi, tvb,  offset, 1, rh_1);
2316
2317         offset += 1;
2318         rh_2 = tvb_get_guint8(tvb, offset);
2319
2320         /* Create the bitfield tree for byte 2*/
2321         bf_item = proto_tree_add_uint(tree, hf_sna_rh_2, tvb, offset, 1, rh_2);
2322
2323         if (!is_response) {
2324                 bf_tree = proto_item_add_subtree(bf_item, ett_sna_rh_2);
2325
2326                 proto_tree_add_boolean(bf_tree, hf_sna_rh_bbi, tvb,  offset, 1,
2327                     rh_2);
2328                 proto_tree_add_boolean(bf_tree, hf_sna_rh_ebi, tvb,  offset, 1,
2329                     rh_2);
2330                 proto_tree_add_boolean(bf_tree, hf_sna_rh_cdi, tvb,  offset, 1,
2331                     rh_2);
2332                 proto_tree_add_uint(bf_tree, hf_sna_rh_csi, tvb,  offset, 1,
2333                     rh_2);
2334                 proto_tree_add_boolean(bf_tree, hf_sna_rh_edi, tvb,  offset, 1,
2335                     rh_2);
2336                 proto_tree_add_boolean(bf_tree, hf_sna_rh_pdi, tvb,  offset, 1,
2337                     rh_2);
2338                 proto_tree_add_boolean(bf_tree, hf_sna_rh_cebi, tvb, offset, 1,
2339                     rh_2);
2340         }
2341
2342         /* XXX - check for sdi. If TRUE, the next 4 bytes will be sense data */
2343 }
2344
2345 /* --------------------------------------------------------------------
2346  * Chapter 6 Request/Response Units (RUs)
2347  * --------------------------------------------------------------------
2348  */
2349
2350 /* --------------------------------------------------------------------
2351  * Chapter 9 Common Fields
2352  * --------------------------------------------------------------------
2353  */
2354
2355 static void
2356 dissect_control_05hpr(tvbuff_t *tvb, proto_tree *tree, int hpr,
2357     enum parse parse)
2358 {
2359         proto_tree      *bf_tree;
2360         proto_item      *bf_item;
2361         guint8          type;
2362         guint16         offset, len, pad;
2363
2364         if (!tree)
2365                 return;
2366
2367         type = tvb_get_guint8(tvb, 2);
2368
2369         bf_item = proto_tree_add_uint(tree, hf_sna_control_05_type, tvb,
2370             2, 1, type);
2371         bf_tree = proto_item_add_subtree(bf_item, ett_sna_control_05hpr_type);
2372
2373         proto_tree_add_boolean(bf_tree, hf_sna_control_05_ptp, tvb, 2, 1, type);
2374         proto_tree_add_text(tree, tvb, 3, 1, "Reserved");
2375
2376         offset = 4;
2377
2378         while (tvb_offset_exists(tvb, offset)) {
2379                 if (parse == LT) {
2380                         len = tvb_get_guint8(tvb, offset+0);
2381                 } else {
2382                         len = tvb_get_guint8(tvb, offset+1);
2383                 }
2384                 if (len) {
2385                         dissect_control(tvb, offset, len, tree, hpr, parse);
2386                         pad = (len+3) & 0xfffc;
2387                         if (pad > len)
2388                                 proto_tree_add_text(tree, tvb, offset+len,
2389                                     pad-len, "Padding");
2390                         offset += pad;
2391                 } else {
2392                         return;
2393                 }
2394         }
2395 }
2396
2397 static void
2398 dissect_control_05(tvbuff_t *tvb, proto_tree *tree)
2399 {
2400         if(!tree)
2401                 return;
2402
2403         proto_tree_add_item(tree, hf_sna_control_05_delay, tvb, 2, 2, FALSE);
2404 }
2405
2406 static void
2407 dissect_control_0e(tvbuff_t *tvb, proto_tree *tree)
2408 {
2409         gint    len;
2410         guint8  *buf;
2411
2412         if (!tree)
2413                 return;
2414
2415         proto_tree_add_item(tree, hf_sna_control_0e_type, tvb, 2, 1, FALSE);
2416
2417         len = tvb_reported_length_remaining(tvb, 3);
2418         if (len <= 0)
2419                 return;
2420
2421         buf = tvb_get_string(tvb, 3, len);
2422         EBCDIC_to_ASCII(buf, len);
2423         proto_tree_add_string(tree, hf_sna_control_0e_value, tvb, 3, len, buf);
2424         g_free(buf);
2425 }
2426
2427 static void
2428 dissect_control(tvbuff_t *parent_tvb, int offset, int control_len,
2429     proto_tree *tree, int hpr, enum parse parse)
2430 {
2431         tvbuff_t        *tvb;
2432         gint            length, reported_length;
2433         proto_tree      *sub_tree;
2434         proto_item      *sub_item;
2435         int             len, key;
2436         gint            ett;
2437
2438         length = tvb_length_remaining(parent_tvb, offset);
2439         reported_length = tvb_reported_length_remaining(parent_tvb, offset);
2440         if (control_len < length)
2441                 length = control_len;
2442         if (control_len < reported_length)
2443                 reported_length = control_len;
2444         tvb = tvb_new_subset(parent_tvb, offset, length, reported_length);
2445
2446         sub_tree = NULL;
2447
2448         if (parse == LT) {
2449                 len = tvb_get_guint8(tvb, 0);
2450                 key = tvb_get_guint8(tvb, 1);
2451         } else {
2452                 key = tvb_get_guint8(tvb, 0);
2453                 len = tvb_get_guint8(tvb, 1);
2454         }
2455         ett = ett_sna_control_un;
2456
2457         if (tree) {
2458                 if (key == 5) {
2459                          if (hpr) ett = ett_sna_control_05hpr;
2460                          else ett = ett_sna_control_05;
2461                 }
2462                 if (key == 0x0e) ett = ett_sna_control_0e;
2463
2464                 if (((key == 0) || (key == 3) || (key == 5)) && hpr)
2465                         sub_item = proto_tree_add_text(tree, tvb, 0, -1,
2466                             val_to_str(key, sna_control_hpr_vals,
2467                             "Unknown Control Vector"));
2468                 else
2469                         sub_item = proto_tree_add_text(tree, tvb, 0, -1,
2470                             val_to_str(key, sna_control_vals,
2471                             "Unknown Control Vector"));
2472                 sub_tree = proto_item_add_subtree(sub_item, ett);
2473                 if (parse == LT) {
2474                         proto_tree_add_uint(sub_tree, hf_sna_control_len,
2475                             tvb, 0, 1, len);
2476                         if (((key == 0) || (key == 3) || (key == 5)) && hpr)
2477                                 proto_tree_add_uint(sub_tree,
2478                                     hf_sna_control_hprkey, tvb, 1, 1, key);
2479                         else
2480                                 proto_tree_add_uint(sub_tree,
2481                                     hf_sna_control_key, tvb, 1, 1, key);
2482                 } else {
2483                         if (((key == 0) || (key == 3) || (key == 5)) && hpr)
2484                                 proto_tree_add_uint(sub_tree,
2485                                     hf_sna_control_hprkey, tvb, 0, 1, key);
2486                         else
2487                                 proto_tree_add_uint(sub_tree,
2488                                     hf_sna_control_key, tvb, 0, 1, key);
2489                         proto_tree_add_uint(sub_tree, hf_sna_control_len,
2490                             tvb, 1, 1, len);
2491                 }
2492         }
2493         switch(key) {
2494                 case 0x05:
2495                         if (hpr)
2496                                 dissect_control_05hpr(tvb, sub_tree, hpr,
2497                                     parse);
2498                         else
2499                                 dissect_control_05(tvb, sub_tree);
2500                         break;
2501                 case 0x0e:
2502                         dissect_control_0e(tvb, sub_tree);
2503                         break;
2504         }
2505 }
2506
2507 /* --------------------------------------------------------------------
2508  * Chapter 11 Function Management (FM) Headers
2509  * --------------------------------------------------------------------
2510  */
2511
2512 /* --------------------------------------------------------------------
2513  * Chapter 12 Presentation Services (PS) Headers
2514  * --------------------------------------------------------------------
2515  */
2516
2517 /* --------------------------------------------------------------------
2518  * Chapter 13 GDS Variables
2519  * --------------------------------------------------------------------
2520  */
2521
2522 static void
2523 dissect_gds(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
2524     proto_tree *parent_tree)
2525 {
2526         guint16         length;
2527         guint16         type;
2528         int             cont;
2529         int             offset;
2530         proto_tree      *gds_tree;
2531         proto_item      *gds_item;
2532
2533         offset = 0;
2534         cont   = 1;
2535         type   = tvb_get_ntohs(tvb, offset+2);
2536
2537         while (cont) {
2538                 length = tvb_get_ntohs(tvb, offset) & 0x7fff;
2539                 cont   = (tvb_get_ntohs(tvb, offset) & 0x8000) ? 1 : 0;
2540                 type   = tvb_get_ntohs(tvb, offset+2);
2541
2542                 if (length < 2 ) /* escape sequence ? */
2543                         return;
2544                 if (tree) {
2545                         gds_item = proto_tree_add_item(tree, hf_sna_gds, tvb,
2546                             offset, length, FALSE);
2547                         gds_tree = proto_item_add_subtree(gds_item,
2548                             ett_sna_gds);
2549
2550                         proto_tree_add_uint(gds_tree, hf_sna_gds_len, tvb,
2551                             offset, 2, length);
2552                         proto_tree_add_boolean(gds_tree, hf_sna_gds_cont, tvb,
2553                             offset, 2, cont);
2554                         proto_tree_add_uint(gds_tree, hf_sna_gds_type, tvb,
2555                             offset+2, 2, type);
2556                 }
2557                 offset += length;
2558         }
2559         if (tvb_offset_exists(tvb, offset))
2560                 call_dissector(data_handle,
2561                     tvb_new_subset(tvb, offset, -1, -1), pinfo, parent_tree);
2562 }
2563
2564 /* --------------------------------------------------------------------
2565  * General stuff
2566  * --------------------------------------------------------------------
2567  */
2568
2569 static void
2570 dissect_sna(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
2571 {
2572         guint8          fid;
2573         proto_tree      *sna_tree = NULL;
2574         proto_item      *sna_ti = NULL;
2575
2576         if (check_col(pinfo->cinfo, COL_PROTOCOL))
2577                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SNA");
2578         if (check_col(pinfo->cinfo, COL_INFO))
2579                 col_clear(pinfo->cinfo, COL_INFO);
2580
2581         /* SNA data should be printed in EBCDIC, not ASCII */
2582         pinfo->fd->flags.encoding = CHAR_EBCDIC;
2583
2584         if (tree) {
2585
2586                 /* Don't bother setting length. We'll set it later after we find
2587                  * the lengths of TH/RH/RU */
2588                 sna_ti = proto_tree_add_item(tree, proto_sna, tvb, 0, -1,
2589                     FALSE);
2590                 sna_tree = proto_item_add_subtree(sna_ti, ett_sna);
2591         }
2592
2593         /* Transmission Header Format Identifier */
2594         fid = hi_nibble(tvb_get_guint8(tvb, 0));
2595         switch(fid) {
2596                 case 0xa:       /* HPR Network Layer Packet */
2597                 case 0xb:
2598                 case 0xc:
2599                 case 0xd:
2600                         dissect_nlp(tvb, pinfo, sna_tree, tree);
2601                         break;
2602                 default:
2603                         dissect_fid(tvb, pinfo, sna_tree, tree);
2604         }
2605 }
2606
2607 static void
2608 dissect_sna_xid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
2609 {
2610         proto_tree      *sna_tree = NULL;
2611         proto_item      *sna_ti = NULL;
2612
2613         if (check_col(pinfo->cinfo, COL_PROTOCOL))
2614                 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SNA");
2615         if (check_col(pinfo->cinfo, COL_INFO))
2616                 col_clear(pinfo->cinfo, COL_INFO);
2617
2618         /* SNA data should be printed in EBCDIC, not ASCII */
2619         pinfo->fd->flags.encoding = CHAR_EBCDIC;
2620
2621         if (tree) {
2622
2623                 /* Don't bother setting length. We'll set it later after we find
2624                  * the lengths of XID */
2625                 sna_ti = proto_tree_add_item(tree, proto_sna_xid, tvb, 0, -1,
2626                     FALSE);
2627                 sna_tree = proto_item_add_subtree(sna_ti, ett_sna);
2628         }
2629         dissect_xid(tvb, pinfo, sna_tree, tree);
2630 }
2631
2632 static void
2633 sna_init(void)
2634 {
2635         fragment_table_init(&sna_fragment_table);
2636         reassembled_table_init(&sna_reassembled_table);
2637 }
2638
2639
2640 void
2641 proto_register_sna(void)
2642 {
2643         static hf_register_info hf[] = {
2644                 { &hf_sna_th,
2645                 { "Transmission Header", "sna.th", FT_NONE, BASE_NONE,
2646                      NULL, 0x0, "", HFILL }},
2647
2648                 { &hf_sna_th_0,
2649                 { "Transmission Header Byte 0", "sna.th.0", FT_UINT8, BASE_HEX,
2650                     NULL, 0x0,
2651                     "TH Byte 0", HFILL }},
2652
2653                 { &hf_sna_th_fid,
2654                 { "Format Identifer", "sna.th.fid", FT_UINT8, BASE_HEX,
2655                     VALS(sna_th_fid_vals), 0xf0, "", HFILL }},
2656
2657                 { &hf_sna_th_mpf,
2658                 { "Mapping Field", "sna.th.mpf", FT_UINT8,
2659                     BASE_DEC, VALS(sna_th_mpf_vals), 0x0c, "", HFILL }},
2660
2661                 { &hf_sna_th_odai,
2662                 { "ODAI Assignment Indicator", "sna.th.odai", FT_UINT8,
2663                     BASE_DEC, NULL, 0x02, "", HFILL }},
2664
2665                 { &hf_sna_th_efi,
2666                 { "Expedited Flow Indicator", "sna.th.efi", FT_UINT8,
2667                     BASE_DEC, VALS(sna_th_efi_vals), 0x01, "", HFILL }},
2668
2669                 { &hf_sna_th_daf,
2670                 { "Destination Address Field", "sna.th.daf", FT_UINT16,
2671                     BASE_HEX, NULL, 0x0, "", HFILL }},
2672
2673                 { &hf_sna_th_oaf,
2674                 { "Origin Address Field", "sna.th.oaf", FT_UINT16, BASE_HEX,
2675                     NULL, 0x0, "", HFILL }},
2676
2677                 { &hf_sna_th_snf,
2678                 { "Sequence Number Field", "sna.th.snf", FT_UINT16, BASE_DEC,
2679                     NULL, 0x0, "", HFILL }},
2680
2681                 { &hf_sna_th_dcf,
2682                 { "Data Count Field", "sna.th.dcf", FT_UINT16, BASE_DEC,
2683                     NULL, 0x0, "", HFILL }},
2684
2685                 { &hf_sna_th_lsid,
2686                 { "Local Session Identification", "sna.th.lsid", FT_UINT8,
2687                     BASE_HEX, NULL, 0x0, "", HFILL }},
2688
2689                 { &hf_sna_th_tg_sweep,
2690                 { "Transmission Group Sweep", "sna.th.tg_sweep", FT_UINT8,
2691                     BASE_DEC, VALS(sna_th_tg_sweep_vals), 0x08, "", HFILL }},
2692
2693                 { &hf_sna_th_er_vr_supp_ind,
2694                 { "ER and VR Support Indicator", "sna.th.er_vr_supp_ind",
2695                     FT_UINT8, BASE_DEC, VALS(sna_th_er_vr_supp_ind_vals),
2696                     0x04, "", HFILL }},
2697
2698                 { &hf_sna_th_vr_pac_cnt_ind,
2699                 { "Virtual Route Pacing Count Indicator",
2700                     "sna.th.vr_pac_cnt_ind", FT_UINT8, BASE_DEC,
2701                     VALS(sna_th_vr_pac_cnt_ind_vals), 0x02, "", HFILL }},
2702
2703                 { &hf_sna_th_ntwk_prty,
2704                 { "Network Priority", "sna.th.ntwk_prty", FT_UINT8, BASE_DEC,
2705                     VALS(sna_th_ntwk_prty_vals), 0x01, "", HFILL }},
2706
2707                 { &hf_sna_th_tgsf,
2708                 { "Transmission Group Segmenting Field", "sna.th.tgsf",
2709                     FT_UINT8, BASE_HEX, VALS(sna_th_tgsf_vals), 0xc0,
2710                     "", HFILL }},
2711
2712                 { &hf_sna_th_mft,
2713                 { "MPR FID4 Type", "sna.th.mft", FT_BOOLEAN, BASE_NONE,
2714                     NULL, 0x04, "", HFILL }},
2715
2716                 { &hf_sna_th_piubf,
2717                 { "PIU Blocking Field", "sna.th.piubf", FT_UINT8, BASE_HEX,
2718                     VALS(sna_th_piubf_vals), 0x03, "", HFILL }},
2719
2720                 { &hf_sna_th_iern,
2721                 { "Initial Explicit Route Number", "sna.th.iern", FT_UINT8,
2722                     BASE_DEC, NULL, 0xf0, "", HFILL }},
2723
2724                 { &hf_sna_th_nlpoi,
2725                 { "NLP Offset Indicator", "sna.th.nlpoi", FT_UINT8, BASE_DEC,
2726                     VALS(sna_th_nlpoi_vals), 0x80, "", HFILL }},
2727
2728                 { &hf_sna_th_nlp_cp,
2729                 { "NLP Count or Padding", "sna.th.nlp_cp", FT_UINT8, BASE_DEC,
2730                     NULL, 0x70, "", HFILL }},
2731
2732                 { &hf_sna_th_ern,
2733                 { "Explicit Route Number", "sna.th.ern", FT_UINT8, BASE_DEC,
2734                     NULL, 0x0f, "", HFILL }},
2735
2736                 { &hf_sna_th_vrn,
2737                 { "Virtual Route Number", "sna.th.vrn", FT_UINT8, BASE_DEC,
2738                     NULL, 0xf0, "", HFILL }},
2739
2740                 { &hf_sna_th_tpf,
2741                 { "Transmission Priority Field", "sna.th.tpf", FT_UINT8,
2742                     BASE_HEX, VALS(sna_th_tpf_vals), 0x03, "", HFILL }},
2743
2744                 { &hf_sna_th_vr_cwi,
2745                 { "Virtual Route Change Window Indicator", "sna.th.vr_cwi",
2746                     FT_UINT16, BASE_DEC, VALS(sna_th_vr_cwi_vals), 0x8000,
2747                     "Change Window Indicator", HFILL }},
2748
2749                 { &hf_sna_th_tg_nonfifo_ind,
2750                 { "Transmission Group Non-FIFO Indicator",
2751                     "sna.th.tg_nonfifo_ind", FT_BOOLEAN, 16,
2752                     TFS(&sna_th_tg_nonfifo_ind_truth), 0x4000, "", HFILL }},
2753
2754                 { &hf_sna_th_vr_sqti,
2755                 { "Virtual Route Sequence and Type Indicator", "sna.th.vr_sqti",
2756                     FT_UINT16, BASE_HEX, VALS(sna_th_vr_sqti_vals), 0x3000,
2757                     "Route Sequence and Type", HFILL }},
2758
2759                 { &hf_sna_th_tg_snf,
2760                 { "Transmission Group Sequence Number Field", "sna.th.tg_snf",
2761                     FT_UINT16, BASE_DEC, NULL, 0x0fff, "", HFILL }},
2762
2763                 { &hf_sna_th_vrprq,
2764                 { "Virtual Route Pacing Request", "sna.th.vrprq", FT_BOOLEAN,
2765                     16, TFS(&sna_th_vrprq_truth), 0x8000, "", HFILL }},
2766
2767                 { &hf_sna_th_vrprs,
2768                 { "Virtual Route Pacing Response", "sna.th.vrprs", FT_BOOLEAN,
2769                     16, TFS(&sna_th_vrprs_truth), 0x4000, "", HFILL }},
2770
2771                 { &hf_sna_th_vr_cwri,
2772                 { "Virtual Route Change Window Reply Indicator",
2773                     "sna.th.vr_cwri", FT_UINT16, BASE_DEC,
2774                     VALS(sna_th_vr_cwri_vals), 0x2000, "", HFILL }},
2775
2776                 { &hf_sna_th_vr_rwi,
2777                 { "Virtual Route Reset Window Indicator", "sna.th.vr_rwi",
2778                     FT_BOOLEAN, 16, TFS(&sna_th_vr_rwi_truth), 0x1000,
2779                     "", HFILL }},
2780
2781                 { &hf_sna_th_vr_snf_send,
2782                 { "Virtual Route Send Sequence Number Field",
2783                     "sna.th.vr_snf_send", FT_UINT16, BASE_DEC, NULL, 0x0fff,
2784                     "Send Sequence Number Field", HFILL }},
2785
2786                 { &hf_sna_th_dsaf,
2787                 { "Destination Subarea Address Field", "sna.th.dsaf",
2788                     FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
2789
2790                 { &hf_sna_th_osaf,
2791                 { "Origin Subarea Address Field", "sna.th.osaf", FT_UINT32,
2792                     BASE_HEX, NULL, 0x0, "", HFILL }},
2793
2794                 { &hf_sna_th_snai,
2795                 { "SNA Indicator", "sna.th.snai", FT_BOOLEAN, 8, NULL, 0x10,
2796                     "Used to identify whether the PIU originated or is destined"
2797                     " for an SNA or non-SNA device.", HFILL }},
2798
2799                 { &hf_sna_th_def,
2800                 { "Destination Element Field", "sna.th.def", FT_UINT16,
2801                     BASE_HEX, NULL, 0x0, "", HFILL }},
2802
2803                 { &hf_sna_th_oef,
2804                 { "Origin Element Field", "sna.th.oef", FT_UINT16, BASE_HEX,
2805                     NULL, 0x0, "", HFILL }},
2806
2807                 { &hf_sna_th_sa,
2808                 { "Session Address", "sna.th.sa", FT_BYTES, BASE_HEX,
2809                     NULL, 0x0, "", HFILL }},
2810
2811                 { &hf_sna_th_cmd_fmt,
2812                 { "Command Format", "sna.th.cmd_fmt", FT_UINT8, BASE_HEX,
2813                     NULL, 0x0, "", HFILL }},
2814
2815                 { &hf_sna_th_cmd_type,
2816                 { "Command Type", "sna.th.cmd_type", FT_UINT8, BASE_HEX,
2817                     NULL, 0x0, "", HFILL }},
2818
2819                 { &hf_sna_th_cmd_sn,
2820                 { "Command Sequence Number", "sna.th.cmd_sn", FT_UINT16,
2821                     BASE_DEC, NULL, 0x0, "", HFILL }},
2822
2823                 { &hf_sna_nlp_nhdr,
2824                 { "Network Layer Packet Header", "sna.nlp.nhdr", FT_NONE,
2825                     BASE_NONE, NULL, 0x0, "NHDR", HFILL }},
2826
2827                 { &hf_sna_nlp_nhdr_0,
2828                 { "Network Layer Packet Header Byte 0", "sna.nlp.nhdr.0",
2829                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
2830
2831                 { &hf_sna_nlp_nhdr_1,
2832                 { "Network Layer Packet Header Byte 1", "sna.nlp.nhdr.1",
2833                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
2834
2835                 { &hf_sna_nlp_sm,
2836                 { "Switching Mode Field", "sna.nlp.nhdr.sm", FT_UINT8,
2837                     BASE_HEX, VALS(sna_nlp_sm_vals), 0xe0, "", HFILL }},
2838
2839                 { &hf_sna_nlp_tpf,
2840                 { "Transmission Priority Field", "sna.nlp.nhdr.tpf", FT_UINT8,
2841                     BASE_HEX, VALS(sna_th_tpf_vals), 0x06, "", HFILL }},
2842
2843                 { &hf_sna_nlp_ft,
2844                 { "Function Type", "sna.nlp.nhdr.ft", FT_UINT8, BASE_HEX,
2845                     VALS(sna_nlp_ft_vals), 0xF0, "", HFILL }},
2846
2847                 { &hf_sna_nlp_tspi,
2848                 { "Time Sensitive Packet Indicator", "sna.nlp.nhdr.tspi",
2849                     FT_BOOLEAN, 8, TFS(&sna_nlp_tspi_truth), 0x08, "", HFILL }},
2850
2851                 { &hf_sna_nlp_slowdn1,
2852                 { "Slowdown 1", "sna.nlp.nhdr.slowdn1", FT_BOOLEAN, 8,
2853                     TFS(&sna_nlp_slowdn1_truth), 0x04, "", HFILL }},
2854
2855                 { &hf_sna_nlp_slowdn2,
2856                 { "Slowdown 2", "sna.nlp.nhdr.slowdn2", FT_BOOLEAN, 8,
2857                     TFS(&sna_nlp_slowdn2_truth), 0x02, "", HFILL }},
2858
2859                 { &hf_sna_nlp_fra,
2860                 { "Function Routing Address Entry", "sna.nlp.nhdr.fra",
2861                     FT_BYTES, BASE_NONE, NULL, 0, "", HFILL }},
2862
2863                 { &hf_sna_nlp_anr,
2864                 { "Automatic Network Routing Entry", "sna.nlp.nhdr.anr",
2865                     FT_BYTES, BASE_HEX, NULL, 0, "", HFILL }},
2866
2867                 { &hf_sna_nlp_frh,
2868                 { "Transmission Priority Field", "sna.nlp.frh", FT_UINT8,
2869                     BASE_HEX, VALS(sna_nlp_frh_vals), 0, "", HFILL }},
2870
2871                 { &hf_sna_nlp_thdr,
2872                 { "RTP Transport Header", "sna.nlp.thdr", FT_NONE, BASE_NONE,
2873                     NULL, 0x0, "THDR", HFILL }},
2874
2875                 { &hf_sna_nlp_tcid,
2876                 { "Transport Connection Identifier", "sna.nlp.thdr.tcid",
2877                     FT_BYTES, BASE_HEX, NULL, 0x0, "TCID", HFILL }},
2878
2879                 { &hf_sna_nlp_thdr_8,
2880                 { "RTP Transport Packet Header Byte 8", "sna.nlp.thdr.8",
2881                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
2882
2883                 { &hf_sna_nlp_setupi,
2884                 { "Setup Indicator", "sna.nlp.thdr.setupi", FT_BOOLEAN, 8,
2885                     TFS(&sna_nlp_setupi_truth), 0x40, "", HFILL }},
2886
2887                 { &hf_sna_nlp_somi,
2888                 { "Start Of Message Indicator", "sna.nlp.thdr.somi",
2889                     FT_BOOLEAN, 8, TFS(&sna_nlp_somi_truth), 0x20, "", HFILL }},
2890
2891                 { &hf_sna_nlp_eomi,
2892                 { "End Of Message Indicator", "sna.nlp.thdr.eomi", FT_BOOLEAN,
2893                     8, TFS(&sna_nlp_eomi_truth), 0x10, "", HFILL }},
2894
2895                 { &hf_sna_nlp_sri,
2896                 { "Session Request Indicator", "sna.nlp.thdr.sri", FT_BOOLEAN,
2897                     8, TFS(&sna_nlp_sri_truth), 0x08, "", HFILL }},
2898
2899                 { &hf_sna_nlp_rasapi,
2900                 { "Reply ASAP Indicator", "sna.nlp.thdr.rasapi", FT_BOOLEAN,
2901                     8, TFS(&sna_nlp_rasapi_truth), 0x04, "", HFILL }},
2902
2903                 { &hf_sna_nlp_retryi,
2904                 { "Retry Indicator", "sna.nlp.thdr.retryi", FT_BOOLEAN,
2905                     8, TFS(&sna_nlp_retryi_truth), 0x02, "", HFILL }},
2906
2907                 { &hf_sna_nlp_thdr_9,
2908                 { "RTP Transport Packet Header Byte 9", "sna.nlp.thdr.9",
2909                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
2910
2911                 { &hf_sna_nlp_lmi,
2912                 { "Last Message Indicator", "sna.nlp.thdr.lmi", FT_BOOLEAN,
2913                     8, TFS(&sna_nlp_lmi_truth), 0x80, "", HFILL }},
2914
2915                 { &hf_sna_nlp_cqfi,
2916                 { "Connection Qualifyer Field Indicator", "sna.nlp.thdr.cqfi",
2917                     FT_BOOLEAN, 8, TFS(&sna_nlp_cqfi_truth), 0x08, "", HFILL }},
2918
2919                 { &hf_sna_nlp_osi,
2920                 { "Optional Segments Present Indicator", "sna.nlp.thdr.osi",
2921                     FT_BOOLEAN, 8, TFS(&sna_nlp_osi_truth), 0x04, "", HFILL }},
2922
2923                 { &hf_sna_nlp_offset,
2924                 { "Data Offset/4", "sna.nlp.thdr.offset", FT_UINT16, BASE_HEX,
2925                     NULL, 0x0, "Data Offset in Words", HFILL }},
2926
2927                 { &hf_sna_nlp_dlf,
2928                 { "Data Length Field", "sna.nlp.thdr.dlf", FT_UINT32, BASE_HEX,
2929                     NULL, 0x0, "", HFILL }},
2930
2931                 { &hf_sna_nlp_bsn,
2932                 { "Byte Sequence Number", "sna.nlp.thdr.bsn", FT_UINT32,
2933                     BASE_HEX, NULL, 0x0, "", HFILL }},
2934
2935                 { &hf_sna_nlp_opti_len,
2936                 { "Optional Segment Length/4", "sna.nlp.thdr.optional.len",
2937                     FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
2938
2939                 { &hf_sna_nlp_opti_type,
2940                 { "Optional Segment Type", "sna.nlp.thdr.optional.type",
2941                     FT_UINT8, BASE_HEX, VALS(sna_nlp_opti_vals), 0x0, "",
2942                     HFILL }},
2943
2944                 { &hf_sna_nlp_opti_0d_version,
2945                 { "Version", "sna.nlp.thdr.optional.0d.version",
2946                     FT_UINT16, BASE_HEX, VALS(sna_nlp_opti_0d_version_vals),
2947                     0, "", HFILL }},
2948
2949                 { &hf_sna_nlp_opti_0d_4,
2950                 { "Connection Setup Byte 4", "sna.nlp.thdr.optional.0e.4",
2951                     FT_UINT8, BASE_HEX, NULL, 0, "", HFILL }},
2952
2953                 { &hf_sna_nlp_opti_0d_target,
2954                 { "Target Resource ID Present",
2955                     "sna.nlp.thdr.optional.0d.target",
2956                     FT_BOOLEAN, 8, NULL, 0x80, "", HFILL }},
2957
2958                 { &hf_sna_nlp_opti_0d_arb,
2959                 { "ARB Flow Control", "sna.nlp.thdr.optional.0d.arb",
2960                     FT_BOOLEAN, 8, NULL, 0x10, "", HFILL }},
2961
2962                 { &hf_sna_nlp_opti_0d_reliable,
2963                 { "Reliable Connection", "sna.nlp.thdr.optional.0d.reliable",
2964                     FT_BOOLEAN, 8, NULL, 0x08, "", HFILL }},
2965
2966                 { &hf_sna_nlp_opti_0d_dedicated,
2967                 { "Dedicated RTP Connection",
2968                     "sna.nlp.thdr.optional.0d.dedicated",
2969                     FT_BOOLEAN, 8, NULL, 0x04, "", HFILL }},
2970
2971                 { &hf_sna_nlp_opti_0e_stat,
2972                 { "Status", "sna.nlp.thdr.optional.0e.stat",
2973                     FT_UINT8, BASE_HEX, NULL, 0, "", HFILL }},
2974
2975                 { &hf_sna_nlp_opti_0e_gap,
2976                 { "Gap Detected", "sna.nlp.thdr.optional.0e.gap",
2977                     FT_BOOLEAN, 8, NULL, 0x80, "", HFILL }},
2978
2979                 { &hf_sna_nlp_opti_0e_idle,
2980                 { "RTP Idle Packet", "sna.nlp.thdr.optional.0e.idle",
2981                     FT_BOOLEAN, 8, NULL, 0x40, "", HFILL }},
2982
2983                 { &hf_sna_nlp_opti_0e_nabsp,
2984                 { "Number Of ABSP", "sna.nlp.thdr.optional.0e.nabsp",
2985                     FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
2986
2987                 { &hf_sna_nlp_opti_0e_sync,
2988                 { "Status Report Number", "sna.nlp.thdr.optional.0e.sync",
2989                     FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }},
2990
2991                 { &hf_sna_nlp_opti_0e_echo,
2992                 { "Status Acknowledge Number", "sna.nlp.thdr.optional.0e.echo",
2993                     FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }},
2994
2995                 { &hf_sna_nlp_opti_0e_rseq,
2996                 { "Received Sequence Number", "sna.nlp.thdr.optional.0e.rseq",
2997                     FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
2998
2999                 { &hf_sna_nlp_opti_0e_abspbeg,
3000                 { "ABSP Begin", "sna.nlp.thdr.optional.0e.abspbeg",
3001                     FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
3002
3003                 { &hf_sna_nlp_opti_0e_abspend,
3004                 { "ABSP End", "sna.nlp.thdr.optional.0e.abspend",
3005                     FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }},
3006
3007                 { &hf_sna_nlp_opti_0f_bits,
3008                 { "Client Bits", "sna.nlp.thdr.optional.0f.bits",
3009                     FT_UINT8, BASE_HEX, VALS(sna_nlp_opti_0f_bits_vals),
3010                     0x0, "", HFILL }},
3011
3012                 { &hf_sna_nlp_opti_10_tcid,
3013                 { "Transport Connection Identifier",
3014                     "sna.nlp.thdr.optional.10.tcid",
3015                     FT_BYTES, BASE_HEX, NULL, 0x0, "TCID", HFILL }},
3016
3017                 { &hf_sna_nlp_opti_12_sense,
3018                 { "Sense Data", "sna.nlp.thdr.optional.12.sense",
3019                     FT_BYTES, BASE_HEX, NULL, 0x0, "", HFILL }},
3020
3021                 { &hf_sna_nlp_opti_14_si_len,
3022                 { "Length", "sna.nlp.thdr.optional.14.si.len",
3023                     FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
3024
3025                 { &hf_sna_nlp_opti_14_si_key,
3026                 { "Key", "sna.nlp.thdr.optional.14.si.key",
3027                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
3028
3029                 { &hf_sna_nlp_opti_14_si_2,
3030                 { "Switching Information Byte 2",
3031                     "sna.nlp.thdr.optional.14.si.2",
3032                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
3033
3034                 { &hf_sna_nlp_opti_14_si_refifo,
3035                 { "Resequencing (REFIFO) Indicator",
3036                     "sna.nlp.thdr.optional.14.si.refifo",
3037                     FT_BOOLEAN, 8, NULL, 0x80, "", HFILL }},
3038
3039                 { &hf_sna_nlp_opti_14_si_mobility,
3040                 { "Mobility Indicator",
3041                     "sna.nlp.thdr.optional.14.si.mobility",
3042                     FT_BOOLEAN, 8, NULL, 0x40, "", HFILL }},
3043
3044                 { &hf_sna_nlp_opti_14_si_dirsearch,
3045                 { "Directory Search Required on Path Switch Indicator",
3046                     "sna.nlp.thdr.optional.14.si.dirsearch",
3047                     FT_BOOLEAN, 8, NULL, 0x20, "", HFILL }},
3048
3049                 { &hf_sna_nlp_opti_14_si_limitres,
3050                 { "Limited Resource Link Indicator",
3051                     "sna.nlp.thdr.optional.14.si.limitres",
3052                     FT_BOOLEAN, 8, NULL, 0x10, "", HFILL }},
3053
3054                 { &hf_sna_nlp_opti_14_si_ncescope,
3055                 { "NCE Scope Indicator",
3056                     "sna.nlp.thdr.optional.14.si.ncescope",
3057                     FT_BOOLEAN, 8, NULL, 0x08, "", HFILL }},
3058
3059                 { &hf_sna_nlp_opti_14_si_mnpsrscv,
3060                 { "MNPS RSCV Retention Indicator",
3061                     "sna.nlp.thdr.optional.14.si.mnpsrscv",
3062                     FT_BOOLEAN, 8, NULL, 0x04, "", HFILL }},
3063
3064                 { &hf_sna_nlp_opti_14_si_maxpsize,
3065                 { "Maximum Packet Size On Return Path",
3066                     "sna.nlp.thdr.optional.14.si.maxpsize",
3067                     FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
3068
3069                 { &hf_sna_nlp_opti_14_si_switch,
3070                 { "Path Switch Time", "sna.nlp.thdr.optional.14.si.switch",
3071                     FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
3072
3073                 { &hf_sna_nlp_opti_14_si_alive,
3074                 { "RTP Alive Timer", "sna.nlp.thdr.optional.14.si.alive",
3075                     FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
3076
3077                 { &hf_sna_nlp_opti_14_rr_len,
3078                 { "Length", "sna.nlp.thdr.optional.14.rr.len",
3079                     FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
3080
3081                 { &hf_sna_nlp_opti_14_rr_key,
3082                 { "Key", "sna.nlp.thdr.optional.14.rr.key",
3083                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
3084
3085                 { &hf_sna_nlp_opti_14_rr_2,
3086                 { "Return Route TG Descriptor Byte 2",
3087                     "sna.nlp.thdr.optional.14.rr.2",
3088                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
3089
3090                 { &hf_sna_nlp_opti_14_rr_bfe,
3091                 { "BF Entry Indicator",
3092                     "sna.nlp.thdr.optional.14.rr.bfe",
3093                     FT_BOOLEAN, 8, NULL, 0x80, "", HFILL }},
3094
3095                 { &hf_sna_nlp_opti_14_rr_num,
3096                 { "Number Of TG Control Vectors",
3097                     "sna.nlp.thdr.optional.14.rr.num",
3098                     FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
3099
3100                 { &hf_sna_nlp_opti_22_2,
3101                 { "Adaptive Rate Based Segment Byte 2",
3102                     "sna.nlp.thdr.optional.22.2",
3103                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
3104
3105                 { &hf_sna_nlp_opti_22_type,
3106                 { "Message Type",
3107                     "sna.nlp.thdr.optional.22.type",
3108                     FT_UINT8, BASE_HEX,
3109                     VALS(sna_nlp_opti_22_type_vals), 0xc0, "", HFILL }},
3110
3111                 { &hf_sna_nlp_opti_22_raa,
3112                 { "Rate Adjustment Action",
3113                     "sna.nlp.thdr.optional.22.raa",
3114                     FT_UINT8, BASE_HEX,
3115                     VALS(sna_nlp_opti_22_raa_vals), 0x38, "", HFILL }},
3116
3117                 { &hf_sna_nlp_opti_22_parity,
3118                 { "Parity Indicator",
3119                     "sna.nlp.thdr.optional.22.parity",
3120                     FT_BOOLEAN, 8, NULL, 0x04, "", HFILL }},
3121
3122                 { &hf_sna_nlp_opti_22_arb,
3123                 { "ARB Mode",
3124                     "sna.nlp.thdr.optional.22.arb",
3125                     FT_UINT8, BASE_HEX,
3126                     VALS(sna_nlp_opti_22_arb_vals), 0x03, "", HFILL }},
3127
3128                 { &hf_sna_nlp_opti_22_3,
3129                 { "Adaptive Rate Based Segment Byte 3",
3130                     "sna.nlp.thdr.optional.22.3",
3131                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
3132
3133                 { &hf_sna_nlp_opti_22_ratereq,
3134                 { "Rate Request Correlator",
3135                     "sna.nlp.thdr.optional.22.ratereq",
3136                     FT_UINT8, BASE_DEC, NULL, 0xf0, "", HFILL }},
3137
3138                 { &hf_sna_nlp_opti_22_raterep,
3139                 { "Rate Reply Correlator",
3140                     "sna.nlp.thdr.optional.22.raterep",
3141                     FT_UINT8, BASE_DEC, NULL, 0x0f, "", HFILL }},
3142
3143                 { &hf_sna_nlp_opti_22_field1,
3144                 { "Field 1", "sna.nlp.thdr.optional.22.field1",
3145                     FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
3146
3147                 { &hf_sna_nlp_opti_22_field2,
3148                 { "Field 2", "sna.nlp.thdr.optional.22.field2",
3149                     FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
3150
3151                 { &hf_sna_nlp_opti_22_field3,
3152                 { "Field 3", "sna.nlp.thdr.optional.22.field3",
3153                     FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
3154
3155                 { &hf_sna_nlp_opti_22_field4,
3156                 { "Field 4", "sna.nlp.thdr.optional.22.field4",
3157                     FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL }},
3158
3159                 { &hf_sna_rh,
3160                 { "Request/Response Header", "sna.rh", FT_NONE, BASE_NONE,
3161                     NULL, 0x0, "", HFILL }},
3162
3163                 { &hf_sna_rh_0,
3164                 { "Request/Response Header Byte 0", "sna.rh.0", FT_UINT8,
3165                     BASE_HEX, NULL, 0x0, "", HFILL }},
3166
3167                 { &hf_sna_rh_1,
3168                 { "Request/Response Header Byte 1", "sna.rh.1", FT_UINT8,
3169                     BASE_HEX, NULL, 0x0, "", HFILL }},
3170
3171                 { &hf_sna_rh_2,
3172                 { "Request/Response Header Byte 2", "sna.rh.2", FT_UINT8,
3173                     BASE_HEX, NULL, 0x0, "", HFILL }},
3174
3175                 { &hf_sna_rh_rri,
3176                 { "Request/Response Indicator", "sna.rh.rri", FT_UINT8,
3177                     BASE_DEC, VALS(sna_rh_rri_vals), 0x80, "", HFILL }},
3178
3179                 { &hf_sna_rh_ru_category,
3180                 { "Request/Response Unit Category", "sna.rh.ru_category",
3181                     FT_UINT8, BASE_HEX, VALS(sna_rh_ru_category_vals), 0x60,
3182                     "", HFILL }},
3183
3184                 { &hf_sna_rh_fi,
3185                 { "Format Indicator", "sna.rh.fi", FT_BOOLEAN, 8,
3186                     TFS(&sna_rh_fi_truth), 0x08, "", HFILL }},
3187
3188                 { &hf_sna_rh_sdi,
3189                 { "Sense Data Included", "sna.rh.sdi", FT_BOOLEAN, 8,
3190                     TFS(&sna_rh_sdi_truth), 0x04, "", HFILL }},
3191
3192                 { &hf_sna_rh_bci,
3193                 { "Begin Chain Indicator", "sna.rh.bci", FT_BOOLEAN, 8,
3194                     TFS(&sna_rh_bci_truth), 0x02, "", HFILL }},
3195
3196                 { &hf_sna_rh_eci,
3197                 { "End Chain Indicator", "sna.rh.eci", FT_BOOLEAN, 8,
3198                     TFS(&sna_rh_eci_truth), 0x01, "", HFILL }},
3199
3200                 { &hf_sna_rh_dr1,
3201                 { "Definite Response 1 Indicator", "sna.rh.dr1", FT_BOOLEAN,
3202                     8, NULL, 0x80, "", HFILL }},
3203
3204                 { &hf_sna_rh_lcci,
3205                 { "Length-Checked Compression Indicator", "sna.rh.lcci",
3206                     FT_BOOLEAN, 8, TFS(&sna_rh_lcci_truth), 0x40, "", HFILL }},
3207
3208                 { &hf_sna_rh_dr2,
3209                 { "Definite Response 2 Indicator", "sna.rh.dr2", FT_BOOLEAN,
3210                     8, NULL, 0x20, "", HFILL }},
3211
3212                 { &hf_sna_rh_eri,
3213                 { "Exception Response Indicator", "sna.rh.eri", FT_BOOLEAN,
3214                     8, NULL, 0x10, "", HFILL }},
3215
3216                 { &hf_sna_rh_rti,
3217                 { "Response Type Indicator", "sna.rh.rti", FT_BOOLEAN,
3218                     8, TFS(&sna_rh_rti_truth), 0x10, "", HFILL }},
3219
3220                 { &hf_sna_rh_rlwi,
3221                 { "Request Larger Window Indicator", "sna.rh.rlwi", FT_BOOLEAN,
3222                     8, NULL, 0x04, "", HFILL }},
3223
3224                 { &hf_sna_rh_qri,
3225                 { "Queued Response Indicator", "sna.rh.qri", FT_BOOLEAN,
3226                     8, TFS(&sna_rh_qri_truth), 0x02, "", HFILL }},
3227
3228                 { &hf_sna_rh_pi,
3229                 { "Pacing Indicator", "sna.rh.pi", FT_BOOLEAN,
3230                     8, NULL, 0x01, "", HFILL }},
3231
3232                 { &hf_sna_rh_bbi,
3233                 { "Begin Bracket Indicator", "sna.rh.bbi", FT_BOOLEAN,
3234                     8, NULL, 0x80, "", HFILL }},
3235
3236                 { &hf_sna_rh_ebi,
3237                 { "End Bracket Indicator", "sna.rh.ebi", FT_BOOLEAN,
3238                     8, NULL, 0x40, "", HFILL }},
3239
3240                 { &hf_sna_rh_cdi,
3241                 { "Change Direction Indicator", "sna.rh.cdi", FT_BOOLEAN,
3242                     8, NULL, 0x20, "", HFILL }},
3243
3244                 { &hf_sna_rh_csi,
3245                 { "Code Selection Indicator", "sna.rh.csi", FT_UINT8, BASE_DEC,
3246                     VALS(sna_rh_csi_vals), 0x08, "", HFILL }},
3247
3248                 { &hf_sna_rh_edi,
3249                 { "Enciphered Data Indicator", "sna.rh.edi", FT_BOOLEAN, 8,
3250                     NULL, 0x04, "", HFILL }},
3251
3252                 { &hf_sna_rh_pdi,
3253                 { "Padded Data Indicator", "sna.rh.pdi", FT_BOOLEAN, 8, NULL,
3254                     0x02, "", HFILL }},
3255
3256                 { &hf_sna_rh_cebi,
3257                 { "Conditional End Bracket Indicator", "sna.rh.cebi",
3258                     FT_BOOLEAN, 8, NULL, 0x01, "", HFILL }},
3259
3260 /*              { &hf_sna_ru,
3261                 { "Request/Response Unit", "sna.ru", FT_NONE, BASE_NONE,
3262                     NULL, 0x0, "", HFILL }},*/
3263
3264                 { &hf_sna_gds,
3265                 { "GDS Variable", "sna.gds", FT_NONE, BASE_NONE, NULL, 0x0,
3266                     "", HFILL }},
3267
3268                 { &hf_sna_gds_len,
3269                 { "GDS Variable Length", "sna.gds.len", FT_UINT16, BASE_DEC,
3270                     NULL, 0x7fff, "", HFILL }},
3271
3272                 { &hf_sna_gds_cont,
3273                 { "Continuation Flag", "sna.gds.cont", FT_BOOLEAN, 16, NULL,
3274                     0x8000, "", HFILL }},
3275
3276                 { &hf_sna_gds_type,
3277                 { "Type of Variable", "sna.gds.type", FT_UINT16, BASE_HEX,
3278                     VALS(sna_gds_var_vals), 0x0, "", HFILL }},
3279
3280                 { &hf_sna_xid,
3281                 { "XID", "sna.xid", FT_NONE, BASE_NONE, NULL, 0x0,
3282                     "XID Frame", HFILL }},
3283
3284                 { &hf_sna_xid_0,
3285                 { "XID Byte 0", "sna.xid.0", FT_UINT8, BASE_HEX, NULL, 0x0,
3286                     "", HFILL }},
3287
3288                 { &hf_sna_xid_format,
3289                 { "XID Format", "sna.xid.format", FT_UINT8, BASE_DEC, NULL,
3290                     0xf0, "", HFILL }},
3291
3292                 { &hf_sna_xid_type,
3293                 { "XID Type", "sna.xid.type", FT_UINT8, BASE_DEC,
3294                     VALS(sna_xid_type_vals), 0x0f, "", HFILL }},
3295
3296                 { &hf_sna_xid_len,
3297                 { "XID Length", "sna.xid.len", FT_UINT8, BASE_DEC, NULL, 0x0,
3298                     "", HFILL }},
3299
3300                 { &hf_sna_xid_id,
3301                 { "Node Identification", "sna.xid.id", FT_UINT32, BASE_HEX,
3302                     NULL, 0x0, "", HFILL }},
3303
3304                 { &hf_sna_xid_idblock,
3305                 { "ID Block", "sna.xid.idblock", FT_UINT32, BASE_HEX, NULL,
3306                     0xfff00000, "", HFILL }},
3307
3308                 { &hf_sna_xid_idnum,
3309                 { "ID Number", "sna.xid.idnum", FT_UINT32, BASE_HEX, NULL,
3310                     0x0fffff, "", HFILL }},
3311
3312                 { &hf_sna_xid_3_8,
3313                 { "Characteristics of XID sender", "sna.xid.type3.8", FT_UINT16,
3314                     BASE_HEX, NULL, 0x0, "", HFILL }},
3315
3316                 { &hf_sna_xid_3_init_self,
3317                 { "INIT-SELF support", "sna.xid.type3.initself",
3318                     FT_BOOLEAN, 16, NULL, 0x8000, "", HFILL }},
3319
3320                 { &hf_sna_xid_3_stand_bind,
3321                 { "Stand-Alone BIND Support", "sna.xid.type3.stand_bind",
3322                     FT_BOOLEAN, 16, NULL, 0x4000, "", HFILL }},
3323
3324                 { &hf_sna_xid_3_gener_bind,
3325                 { "Whole BIND PIU generated indicator",
3326                     "sna.xid.type3.gener_bind", FT_BOOLEAN, 16, NULL, 0x2000,
3327                     "Whole BIND PIU generated", HFILL }},
3328
3329                 { &hf_sna_xid_3_recve_bind,
3330                 { "Whole BIND PIU required indicator",
3331                     "sna.xid.type3.recve_bind", FT_BOOLEAN, 16, NULL, 0x1000,
3332                     "Whole BIND PIU required", HFILL }},
3333
3334                 { &hf_sna_xid_3_actpu,
3335                 { "ACTPU suppression indicator", "sna.xid.type3.actpu",
3336                     FT_BOOLEAN, 16, NULL, 0x0080, "", HFILL }},
3337
3338                 { &hf_sna_xid_3_nwnode,
3339                 { "Sender is network node", "sna.xid.type3.nwnode",
3340                     FT_BOOLEAN, 16, NULL, 0x0040, "", HFILL }},
3341
3342                 { &hf_sna_xid_3_cp,
3343                 { "Control Point Services", "sna.xid.type3.cp",
3344                     FT_BOOLEAN, 16, NULL, 0x0020, "", HFILL }},
3345
3346                 { &hf_sna_xid_3_cpcp,
3347                 { "CP-CP session support", "sna.xid.type3.cpcp",
3348                     FT_BOOLEAN, 16, NULL, 0x0010, "", HFILL }},
3349
3350                 { &hf_sna_xid_3_state,
3351                 { "XID exchange state indicator", "sna.xid.type3.state",
3352                     FT_UINT16, BASE_HEX, VALS(sna_xid_3_state_vals),
3353                     0x000c, "", HFILL }},
3354
3355                 { &hf_sna_xid_3_nonact,
3356                 { "Nonactivation Exchange", "sna.xid.type3.nonact",
3357                     FT_BOOLEAN, 16, NULL, 0x0002, "", HFILL }},
3358
3359                 { &hf_sna_xid_3_cpchange,
3360                 { "CP name change support", "sna.xid.type3.cpchange",
3361                     FT_BOOLEAN, 16, NULL, 0x0001, "", HFILL }},
3362
3363                 { &hf_sna_xid_3_10,
3364                 { "XID Type 3 Byte 10", "sna.xid.type3.10", FT_UINT8, BASE_HEX,
3365                     NULL, 0x0, "", HFILL }},
3366
3367                 { &hf_sna_xid_3_asend_bind,
3368                 { "Adaptive BIND pacing support as sender",
3369                     "sna.xid.type3.asend_bind", FT_BOOLEAN, 8, NULL, 0x80,
3370                     "Pacing support as sender", HFILL }},
3371
3372                 { &hf_sna_xid_3_arecv_bind,
3373                 { "Adaptive BIND pacing support as receiver",
3374                     "sna.xid.type3.asend_recv", FT_BOOLEAN, 8, NULL, 0x40,
3375                     "Pacing support as receive", HFILL }},
3376
3377                 { &hf_sna_xid_3_quiesce,
3378                 { "Quiesce TG Request",
3379                     "sna.xid.type3.quiesce", FT_BOOLEAN, 8, NULL, 0x20,
3380                     "", HFILL }},
3381
3382                 { &hf_sna_xid_3_pucap,
3383                 { "PU Capabilities",
3384                     "sna.xid.type3.pucap", FT_BOOLEAN, 8, NULL, 0x10,
3385                     "", HFILL }},
3386
3387                 { &hf_sna_xid_3_pbn,
3388                 { "Peripheral Border Node",
3389                     "sna.xid.type3.pbn", FT_BOOLEAN, 8, NULL, 0x08,
3390                     "", HFILL }},
3391
3392                 { &hf_sna_xid_3_pacing,
3393                 { "Qualifier for adaptive BIND pacing support",
3394                     "sna.xid.type3.pacing", FT_UINT8, BASE_HEX, NULL, 0x03,
3395                     "", HFILL }},
3396
3397                 { &hf_sna_xid_3_11,
3398                 { "XID Type 3 Byte 11", "sna.xid.type3.11", FT_UINT8, BASE_HEX,
3399                     NULL, 0x0, "", HFILL }},
3400
3401                 { &hf_sna_xid_3_tgshare,
3402                 { "TG Sharing Prohibited Indicator",
3403                     "sna.xid.type3.tgshare", FT_BOOLEAN, 8, NULL, 0x40,
3404                     "", HFILL }},
3405
3406                 { &hf_sna_xid_3_dedsvc,
3407                 { "Dedicated SVC Idicator",
3408                     "sna.xid.type3.dedsvc", FT_BOOLEAN, 8, NULL, 0x20,
3409                     "", HFILL }},
3410
3411                 { &hf_sna_xid_3_12,
3412                 { "XID Type 3 Byte 12", "sna.xid.type3.12", FT_UINT8, BASE_HEX,
3413                     NULL, 0x0, "", HFILL }},
3414
3415                 { &hf_sna_xid_3_negcsup,
3416                 { "Negotiation Complete Supported",
3417                     "sna.xid.type3.negcsup", FT_BOOLEAN, 8, NULL, 0x80,
3418                     "", HFILL }},
3419
3420                 { &hf_sna_xid_3_negcomp,
3421                 { "Negotiation Complete",
3422                     "sna.xid.type3.negcomp", FT_BOOLEAN, 8, NULL, 0x40,
3423                     "", HFILL }},
3424
3425                 { &hf_sna_xid_3_15,
3426                 { "XID Type 3 Byte 15", "sna.xid.type3.15", FT_UINT8, BASE_HEX,
3427                     NULL, 0x0, "", HFILL }},
3428
3429                 { &hf_sna_xid_3_partg,
3430                 { "Parallel TG Support",
3431                     "sna.xid.type3.partg", FT_BOOLEAN, 8, NULL, 0x80,
3432                     "", HFILL }},
3433
3434                 { &hf_sna_xid_3_dlur,
3435                 { "Dependent LU Requester Indicator",
3436                     "sna.xid.type3.dlur", FT_BOOLEAN, 8, NULL, 0x40,
3437                     "", HFILL }},
3438
3439                 { &hf_sna_xid_3_dlus,
3440                 { "DLUS Served LU Registration Indicator",
3441                     "sna.xid.type3.dlus", FT_BOOLEAN, 8, NULL, 0x20,
3442                     "", HFILL }},
3443
3444                 { &hf_sna_xid_3_exbn,
3445                 { "Extended HPR Border Node",
3446                     "sna.xid.type3.exbn", FT_BOOLEAN, 8, NULL, 0x10,
3447                     "", HFILL }},
3448
3449                 { &hf_sna_xid_3_genodai,
3450                 { "Generalized ODAI Usage Option",
3451                     "sna.xid.type3.genodai", FT_BOOLEAN, 8, NULL, 0x08,
3452                     "", HFILL }},
3453
3454                 { &hf_sna_xid_3_branch,
3455                 { "Branch Indicator", "sna.xid.type3.branch",
3456                     FT_UINT8, BASE_HEX, VALS(sna_xid_3_branch_vals),
3457                     0x06, "", HFILL }},
3458
3459                 { &hf_sna_xid_3_brnn,
3460                 { "Option Set 1123 Indicator",
3461                     "sna.xid.type3.brnn", FT_BOOLEAN, 8, NULL, 0x01,
3462                     "", HFILL }},
3463
3464                 { &hf_sna_xid_3_tg,
3465                 { "XID TG", "sna.xid.type3.tg", FT_UINT8, BASE_HEX, NULL, 0x0,
3466                     "", HFILL }},
3467
3468                 { &hf_sna_xid_3_dlc,
3469                 { "XID DLC", "sna.xid.type3.dlc", FT_UINT8, BASE_HEX, NULL, 0x0,
3470                     "", HFILL }},
3471
3472                 { &hf_sna_xid_3_dlen,
3473                 { "DLC Dependent Section Length", "sna.xid.type3.dlen",
3474                     FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
3475
3476                 { &hf_sna_control_len,
3477                 { "Control Vector Length", "sna.control.len",
3478                     FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
3479
3480                 { &hf_sna_control_key,
3481                 { "Control Vector Key", "sna.control.key",
3482                     FT_UINT8, BASE_HEX, VALS(sna_control_vals), 0x0, "",
3483                     HFILL }},
3484
3485                 { &hf_sna_control_hprkey,
3486                 { "Control Vector HPR Key", "sna.control.hprkey",
3487                     FT_UINT8, BASE_HEX, VALS(sna_control_hpr_vals), 0x0, "",
3488                     HFILL }},
3489
3490                 { &hf_sna_control_05_delay,
3491                 { "Channel Delay", "sna.control.05.delay",
3492                     FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
3493
3494                 { &hf_sna_control_05_type,
3495                 { "Network Address Type", "sna.control.05.type",
3496                     FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
3497
3498                 { &hf_sna_control_05_ptp,
3499                 { "Point-to-point", "sna.control.05.ptp",
3500                     FT_BOOLEAN, 8, NULL, 0x80, "", HFILL }},
3501
3502                 { &hf_sna_control_0e_type,
3503                 { "Type", "sna.control.0e.type",
3504                     FT_UINT8, BASE_HEX, VALS(sna_control_0e_type_vals),
3505                     0, "", HFILL }},
3506
3507                 { &hf_sna_control_0e_value,
3508                 { "Value", "sna.control.0e.value",
3509                     FT_STRING, BASE_NONE, NULL, 0, "", HFILL }},
3510         };
3511         static gint *ett[] = {
3512                 &ett_sna,
3513                 &ett_sna_th,
3514                 &ett_sna_th_fid,
3515                 &ett_sna_nlp_nhdr,
3516                 &ett_sna_nlp_nhdr_0,
3517                 &ett_sna_nlp_nhdr_1,
3518                 &ett_sna_nlp_thdr,
3519                 &ett_sna_nlp_thdr_8,
3520                 &ett_sna_nlp_thdr_9,
3521                 &ett_sna_nlp_opti_un,
3522                 &ett_sna_nlp_opti_0d,
3523                 &ett_sna_nlp_opti_0d_4,
3524                 &ett_sna_nlp_opti_0e,
3525                 &ett_sna_nlp_opti_0e_stat,
3526                 &ett_sna_nlp_opti_0e_absp,
3527                 &ett_sna_nlp_opti_0f,
3528                 &ett_sna_nlp_opti_10,
3529                 &ett_sna_nlp_opti_12,
3530                 &ett_sna_nlp_opti_14,
3531                 &ett_sna_nlp_opti_14_si,
3532                 &ett_sna_nlp_opti_14_si_2,
3533                 &ett_sna_nlp_opti_14_rr,
3534                 &ett_sna_nlp_opti_14_rr_2,
3535                 &ett_sna_nlp_opti_22,
3536                 &ett_sna_nlp_opti_22_2,
3537                 &ett_sna_nlp_opti_22_3,
3538                 &ett_sna_rh,
3539                 &ett_sna_rh_0,
3540                 &ett_sna_rh_1,
3541                 &ett_sna_rh_2,
3542                 &ett_sna_gds,
3543                 &ett_sna_xid_0,
3544                 &ett_sna_xid_id,
3545                 &ett_sna_xid_3_8,
3546                 &ett_sna_xid_3_10,
3547                 &ett_sna_xid_3_11,
3548                 &ett_sna_xid_3_12,
3549                 &ett_sna_xid_3_15,
3550                 &ett_sna_control_un,
3551                 &ett_sna_control_05,
3552                 &ett_sna_control_05hpr,
3553                 &ett_sna_control_05hpr_type,
3554                 &ett_sna_control_0e,
3555         };
3556         module_t *sna_module;
3557
3558         proto_sna = proto_register_protocol("Systems Network Architecture",
3559             "SNA", "sna");
3560         proto_register_field_array(proto_sna, hf, array_length(hf));
3561         proto_register_subtree_array(ett, array_length(ett));
3562         register_dissector("sna", dissect_sna, proto_sna);
3563
3564         proto_sna_xid = proto_register_protocol(
3565             "Systems Network Architecture XID", "SNA XID", "sna_xid");
3566         register_dissector("sna_xid", dissect_sna_xid, proto_sna_xid);
3567
3568         /* Register configuration options */
3569         sna_module = prefs_register_protocol(proto_sna, NULL);
3570         prefs_register_bool_preference(sna_module, "defragment",
3571                 "Reassemble fragmented BIUs",
3572                 "Whether fragmented BIUs should be reassembled",
3573                 &sna_defragment);
3574 }
3575
3576 void
3577 proto_reg_handoff_sna(void)
3578 {
3579         dissector_handle_t sna_handle;
3580         dissector_handle_t sna_xid_handle;
3581
3582         sna_handle = find_dissector("sna");
3583         sna_xid_handle = find_dissector("sna_xid");
3584         dissector_add("llc.dsap", SAP_SNA_PATHCTRL, sna_handle);
3585         dissector_add("llc.dsap", SAP_SNA1, sna_handle);
3586         dissector_add("llc.dsap", SAP_SNA2, sna_handle);
3587         dissector_add("llc.dsap", SAP_SNA3, sna_handle);
3588         dissector_add("llc.xid_dsap", SAP_SNA_PATHCTRL, sna_xid_handle);
3589         dissector_add("llc.xid_dsap", SAP_SNA1, sna_xid_handle);
3590         dissector_add("llc.xid_dsap", SAP_SNA2, sna_xid_handle);
3591         dissector_add("llc.xid_dsap", SAP_SNA3, sna_xid_handle);
3592         /* RFC 2043 */
3593         dissector_add("ppp.protocol", PPP_SNA, sna_handle);
3594         data_handle = find_dissector("data");
3595
3596         register_init_routine(sna_init);
3597 }