forked from osmocom/wireshark
1213 lines
38 KiB
C
1213 lines
38 KiB
C
/* packet-sna.c
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* Routines for SNA
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* Gilbert Ramirez <gram@xiexie.org>
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*
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* $Id: packet-sna.c,v 1.18 2000/08/13 14:08:58 deniel Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <glib.h>
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#include "packet.h"
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#include "llcsaps.h"
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#include "packet-sna.h"
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/*
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* http://www.wanresources.com/snacell.html
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*
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*/
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static int proto_sna = -1;
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static int hf_sna_th = -1;
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static int hf_sna_th_0 = -1;
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static int hf_sna_th_fid = -1;
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static int hf_sna_th_mpf = -1;
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static int hf_sna_th_odai = -1;
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static int hf_sna_th_efi = -1;
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static int hf_sna_th_daf = -1;
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static int hf_sna_th_oaf = -1;
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static int hf_sna_th_snf = -1;
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static int hf_sna_th_dcf = -1;
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static int hf_sna_th_lsid = -1;
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static int hf_sna_th_tg_sweep = -1;
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static int hf_sna_th_er_vr_supp_ind = -1;
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static int hf_sna_th_vr_pac_cnt_ind = -1;
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static int hf_sna_th_ntwk_prty = -1;
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static int hf_sna_th_tgsf = -1;
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static int hf_sna_th_mft = -1;
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static int hf_sna_th_piubf = -1;
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static int hf_sna_th_iern = -1;
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static int hf_sna_th_nlpoi = -1;
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static int hf_sna_th_nlp_cp = -1;
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static int hf_sna_th_ern = -1;
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static int hf_sna_th_vrn = -1;
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static int hf_sna_th_tpf = -1;
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static int hf_sna_th_vr_cwi = -1;
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static int hf_sna_th_tg_nonfifo_ind = -1;
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static int hf_sna_th_vr_sqti = -1;
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static int hf_sna_th_tg_snf = -1;
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static int hf_sna_th_vrprq = -1;
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static int hf_sna_th_vrprs = -1;
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static int hf_sna_th_vr_cwri = -1;
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static int hf_sna_th_vr_rwi = -1;
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static int hf_sna_th_vr_snf_send = -1;
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static int hf_sna_th_dsaf = -1;
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static int hf_sna_th_osaf = -1;
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static int hf_sna_th_snai = -1;
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static int hf_sna_th_def = -1;
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static int hf_sna_th_oef = -1;
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static int hf_sna_th_sa = -1;
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static int hf_sna_th_cmd_fmt = -1;
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static int hf_sna_th_cmd_type = -1;
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static int hf_sna_th_cmd_sn = -1;
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static int hf_sna_rh = -1;
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static int hf_sna_rh_0 = -1;
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static int hf_sna_rh_1 = -1;
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static int hf_sna_rh_2 = -1;
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static int hf_sna_rh_rri = -1;
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static int hf_sna_rh_ru_category = -1;
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static int hf_sna_rh_fi = -1;
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static int hf_sna_rh_sdi = -1;
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static int hf_sna_rh_bci = -1;
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static int hf_sna_rh_eci = -1;
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static int hf_sna_rh_dr1 = -1;
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static int hf_sna_rh_lcci = -1;
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static int hf_sna_rh_dr2 = -1;
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static int hf_sna_rh_eri = -1;
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static int hf_sna_rh_rti = -1;
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static int hf_sna_rh_rlwi = -1;
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static int hf_sna_rh_qri = -1;
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static int hf_sna_rh_pi = -1;
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static int hf_sna_rh_bbi = -1;
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static int hf_sna_rh_ebi = -1;
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static int hf_sna_rh_cdi = -1;
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static int hf_sna_rh_csi = -1;
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static int hf_sna_rh_edi = -1;
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static int hf_sna_rh_pdi = -1;
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static int hf_sna_rh_cebi = -1;
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static int hf_sna_ru = -1;
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static gint ett_sna = -1;
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static gint ett_sna_th = -1;
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static gint ett_sna_th_fid = -1;
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static gint ett_sna_rh = -1;
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static gint ett_sna_rh_0 = -1;
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static gint ett_sna_rh_1 = -1;
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static gint ett_sna_rh_2 = -1;
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/* Format Identifier */
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static const value_string sna_th_fid_vals[] = {
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{ 0x0, "SNA device <--> Non-SNA Device" },
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{ 0x1, "Subarea Nodes, without ER or VR" },
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{ 0x2, "Subarea Node <--> PU2" },
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{ 0x3, "Subarea Node or SNA host <--> Subarea Node" },
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{ 0x4, "Subarea Nodes, supporting ER and VR" },
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{ 0x5, "HPR RTP endpoint nodes" },
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{ 0xf, "Adjaced Subarea Nodes, supporting ER and VR" },
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{ 0x0, NULL }
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};
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/* Mapping Field */
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static const value_string sna_th_mpf_vals[] = {
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{ 0, "Middle segment of a BIU" },
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{ 1, "Last segment of a BIU" },
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{ 2, "First segment of a BIU" },
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{ 3 , "Whole BIU" },
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{ 0, NULL }
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};
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/* Expedited Flow Indicator */
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static const value_string sna_th_efi_vals[] = {
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{ 0, "Normal Flow" },
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{ 1, "Expedited Flow" }
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};
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/* Request/Response Indicator */
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static const value_string sna_rh_rri_vals[] = {
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{ 0, "Request" },
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{ 1, "Response" }
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};
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/* Request/Response Unit Category */
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static const value_string sna_rh_ru_category_vals[] = {
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{ 0x00, "Function Management Data (FMD)" },
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{ 0x01, "Network Control (NC)" },
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{ 0x10, "Data Flow Control (DFC)" },
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{ 0x11, "Session Control (SC)" },
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};
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/* Format Indicator */
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static const true_false_string sna_rh_fi_truth =
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{ "FM Header", "No FM Header" };
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/* Sense Data Included */
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static const true_false_string sna_rh_sdi_truth =
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{ "Included", "Not Included" };
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/* Begin Chain Indicator */
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static const true_false_string sna_rh_bci_truth =
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{ "First in Chain", "Not First in Chain" };
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/* End Chain Indicator */
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static const true_false_string sna_rh_eci_truth =
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{ "Last in Chain", "Not Last in Chain" };
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/* Lengith-Checked Compression Indicator */
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static const true_false_string sna_rh_lcci_truth =
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{ "Compressed", "Not Compressed" };
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/* Response Type Indicator */
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static const true_false_string sna_rh_rti_truth =
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{ "Negative", "Positive" };
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/* Exception Response Indicator */
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static const true_false_string sna_rh_eri_truth =
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{ "Exception", "Definite" };
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/* Queued Response Indicator */
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static const true_false_string sna_rh_qri_truth =
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{ "Enqueue response in TC queues", "Response bypasses TC queues" };
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/* Code Selection Indicator */
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static const value_string sna_rh_csi_vals[] = {
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{ 0, "EBCDIC" },
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{ 1, "ASCII" }
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};
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/* TG Sweep */
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static const value_string sna_th_tg_sweep_vals[] = {
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{ 0, "This PIU may overtake any PU ahead of it." },
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{ 1, "This PIU does not ovetake any PIU ahead of it." }
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};
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/* ER_VR_SUPP_IND */
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static const value_string sna_th_er_vr_supp_ind_vals[] = {
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{ 0, "Each node supports ER and VR protocols" },
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{ 1, "Includes at least one node that does not support ER and VR protocols" }
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};
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/* VR_PAC_CNT_IND */
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static const value_string sna_th_vr_pac_cnt_ind_vals[] = {
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{ 0, "Pacing count on the VR has not reached 0" },
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{ 1, "Pacing count on the VR has reached 0" }
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};
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/* NTWK_PRTY */
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static const value_string sna_th_ntwk_prty_vals[] = {
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{ 0, "PIU flows at a lower priority" },
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{ 1, "PIU flows at network priority (highest transmission priority)" }
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};
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/* TGSF */
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static const value_string sna_th_tgsf_vals[] = {
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{ 0x00, "Not segmented" },
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{ 0x01, "Last segment" },
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{ 0x10, "First segment" },
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{ 0x11, "Middle segment" }
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};
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/* PIUBF */
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static const value_string sna_th_piubf_vals[] = {
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{ 0x00, "Single PIU frame" },
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{ 0x01, "Last PIU of a multiple PIU frame" },
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{ 0x10, "First PIU of a multiple PIU frame" },
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{ 0x11, "Middle PIU of a multiple PIU frame" }
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};
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/* NLPOI */
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static const value_string sna_th_nlpoi_vals[] = {
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{ 0x0, "NLP starts within this FID4 TH" },
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{ 0x1, "NLP byte 0 starts after RH byte 0 following NLP C/P pad" },
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};
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/* TPF */
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static const value_string sna_th_tpf_vals[] = {
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{ 0x00, "Low Priority" },
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{ 0x01, "Medium Priority" },
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{ 0x10, "High Priority" },
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};
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/* VR_CWI */
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static const value_string sna_th_vr_cwi_vals[] = {
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{ 0x0, "Increment window size" },
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{ 0x1, "Decrement window size" },
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};
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/* TG_NONFIFO_IND */
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static const true_false_string sna_th_tg_nonfifo_ind_truth =
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{ "TG FIFO is not required", "TG FIFO is required" };
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/* VR_SQTI */
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static const value_string sna_th_vr_sqti_vals[] = {
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{ 0x00, "Non-sequenced, Non-supervisory" },
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{ 0x01, "Non-sequenced, Supervisory" },
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{ 0x10, "Singly-sequenced" },
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};
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/* VRPRQ */
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static const true_false_string sna_th_vrprq_truth = {
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"VR pacing request is sent asking for a VR pacing response",
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"No VR pacing response is requested",
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};
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/* VRPRS */
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static const true_false_string sna_th_vrprs_truth = {
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"VR pacing response is sent in response to a VRPRQ bit set",
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"No pacing response sent",
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};
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/* VR_CWRI */
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static const value_string sna_th_vr_cwri_vals[] = {
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{ 0, "Increment window size by 1" },
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{ 1, "Decrement window size by 1" },
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};
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/* VR_RWI */
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static const true_false_string sna_th_vr_rwi_truth = {
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"Reset window size to the minimum specified in NC_ACTVR",
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"Do not reset window size",
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};
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static int dissect_fid0_1 (const u_char*, int, frame_data*, proto_tree*);
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static int dissect_fid2 (const u_char*, int, frame_data*, proto_tree*);
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static int dissect_fid3 (const u_char*, int, frame_data*, proto_tree*);
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static int dissect_fid4 (const u_char*, int, frame_data*, proto_tree*);
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static int dissect_fid5 (const u_char*, int, frame_data*, proto_tree*);
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static int dissect_fidf (const u_char*, int, frame_data*, proto_tree*);
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static void dissect_rh (const u_char*, int, frame_data*, proto_tree*);
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static void
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dissect_sna(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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proto_tree *sna_tree = NULL, *th_tree = NULL, *rh_tree = NULL;
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proto_item *sna_ti = NULL, *th_ti = NULL, *rh_ti = NULL;
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guint8 th_fid;
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int sna_header_len = 0, th_header_len = 0;
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OLD_CHECK_DISPLAY_AS_DATA(proto_sna, pd, offset, fd, tree);
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/* SNA data should be printed in EBCDIC, not ASCII */
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fd->flags.encoding = CHAR_EBCDIC;
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if (IS_DATA_IN_FRAME(offset)) {
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/* Transmission Header Format Identifier */
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th_fid = hi_nibble(pd[offset]);
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}
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else {
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/* If our first byte isn't here, stop dissecting */
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return;
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}
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/* Summary information */
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "SNA");
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if (check_col(fd, COL_INFO))
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col_add_str(fd, COL_INFO, val_to_str(th_fid, sna_th_fid_vals, "Unknown FID: %01x"));
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if (tree) {
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/* Don't bother setting length. We'll set it later after we find
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* the lengths of TH/RH/RU */
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sna_ti = proto_tree_add_item(tree, proto_sna, NullTVB, offset, 0, FALSE);
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sna_tree = proto_item_add_subtree(sna_ti, ett_sna);
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/* --- TH --- */
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/* Don't bother setting length. We'll set it later after we find
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* the length of TH */
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th_ti = proto_tree_add_item(sna_tree, hf_sna_th, NullTVB, offset, 0, FALSE);
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th_tree = proto_item_add_subtree(th_ti, ett_sna_th);
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}
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/* Get size of TH */
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switch(th_fid) {
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case 0x0:
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case 0x1:
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th_header_len = dissect_fid0_1(pd, offset, fd, th_tree);
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break;
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case 0x2:
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th_header_len = dissect_fid2(pd, offset, fd, th_tree);
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break;
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case 0x3:
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th_header_len = dissect_fid3(pd, offset, fd, th_tree);
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break;
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case 0x4:
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th_header_len = dissect_fid4(pd, offset, fd, th_tree);
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break;
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case 0x5:
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th_header_len = dissect_fid5(pd, offset, fd, th_tree);
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break;
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case 0xf:
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th_header_len = dissect_fidf(pd, offset, fd, th_tree);
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break;
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default:
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old_dissect_data(pd, offset+1, fd, tree);
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}
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sna_header_len += th_header_len;
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offset += th_header_len;
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if (tree) {
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proto_item_set_len(th_ti, th_header_len);
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/* --- RH --- */
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if (BYTES_ARE_IN_FRAME(offset, 3)) {
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rh_ti = proto_tree_add_item(sna_tree, hf_sna_rh, NullTVB, offset, 3, FALSE);
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rh_tree = proto_item_add_subtree(rh_ti, ett_sna_rh);
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dissect_rh(pd, offset, fd, rh_tree);
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sna_header_len += 3;
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offset += 3;
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}
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else {
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/* If our first byte isn't here, stop dissecting */
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return;
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}
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proto_item_set_len(sna_ti, sna_header_len);
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}
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else {
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if (BYTES_ARE_IN_FRAME(offset, 3)) {
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sna_header_len += 3;
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offset += 3;
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}
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}
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if (IS_DATA_IN_FRAME(offset+1)) {
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old_dissect_data(pd, offset, fd, tree);
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}
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}
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/* FID Types 0 and 1 */
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static int
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dissect_fid0_1 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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proto_tree *bf_tree;
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proto_item *bf_item;
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guint8 th_0;
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guint16 daf, oaf, snf, dcf;
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static int bytes_in_header = 10;
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if (!BYTES_ARE_IN_FRAME(offset, bytes_in_header)) {
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return 0;
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}
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th_0 = pd[offset+0];
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daf = pntohs(&pd[offset+2]);
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oaf = pntohs(&pd[offset+4]);
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snf = pntohs(&pd[offset+6]);
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dcf = pntohs(&pd[offset+8]);
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SET_ADDRESS(&pi.net_src, AT_SNA, 2, &pd[offset+4]);
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SET_ADDRESS(&pi.src, AT_SNA, 2, &pd[offset+4]);
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SET_ADDRESS(&pi.net_dst, AT_SNA, 2, &pd[offset+2]);
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SET_ADDRESS(&pi.dst, AT_SNA, 2, &pd[offset+2]);
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if (!tree) {
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return bytes_in_header;
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}
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/* Create the bitfield tree */
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bf_item = proto_tree_add_uint(tree, hf_sna_th_0, NullTVB, offset, 1, th_0);
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bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
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proto_tree_add_uint(bf_tree, hf_sna_th_fid, NullTVB, offset, 1, th_0);
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proto_tree_add_uint(bf_tree, hf_sna_th_mpf, NullTVB, offset, 1, th_0);
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proto_tree_add_uint(bf_tree, hf_sna_th_efi , NullTVB,offset, 1, th_0);
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|
|
proto_tree_add_text(tree, NullTVB, offset+1, 1, "Reserved");
|
|
proto_tree_add_uint(tree, hf_sna_th_daf , NullTVB,offset+2, 1, daf);
|
|
proto_tree_add_uint(tree, hf_sna_th_oaf , NullTVB,offset+4, 1, oaf);
|
|
proto_tree_add_uint(tree, hf_sna_th_snf , NullTVB,offset+6, 2, snf);
|
|
proto_tree_add_uint(tree, hf_sna_th_dcf , NullTVB,offset+8, 2, dcf);
|
|
|
|
return bytes_in_header;
|
|
|
|
}
|
|
|
|
|
|
/* FID Type 2 */
|
|
static int
|
|
dissect_fid2 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
proto_tree *bf_tree;
|
|
proto_item *bf_item;
|
|
guint8 th_0, daf, oaf;
|
|
guint16 snf;
|
|
|
|
static int bytes_in_header = 6;
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, bytes_in_header)) {
|
|
return 0;
|
|
}
|
|
|
|
th_0 = pd[offset+0];
|
|
daf = pd[offset+2];
|
|
oaf = pd[offset+3];
|
|
|
|
/* Addresses in FID 2 are FT_UINT8 */
|
|
SET_ADDRESS(&pi.net_src, AT_SNA, 1, &pd[offset+3]);
|
|
SET_ADDRESS(&pi.src, AT_SNA, 1, &pd[offset+3]);
|
|
SET_ADDRESS(&pi.net_dst, AT_SNA, 1, &pd[offset+2]);
|
|
SET_ADDRESS(&pi.dst, AT_SNA, 1, &pd[offset+2]);
|
|
|
|
if (!tree) {
|
|
return bytes_in_header;
|
|
}
|
|
|
|
snf = pntohs(&pd[offset+4]);
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_th_0, NullTVB, offset, 1, th_0);
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_fid, NullTVB, offset, 1, th_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_mpf, NullTVB, offset, 1, th_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_odai , NullTVB,offset, 1, th_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_efi , NullTVB,offset, 1, th_0);
|
|
|
|
/* Addresses in FID 2 are FT_UINT8 */
|
|
proto_tree_add_text(tree, NullTVB, offset+1, 1, "Reserved");
|
|
proto_tree_add_uint_format(tree, hf_sna_th_daf , NullTVB,offset+2, 1, daf,
|
|
"Destination Address Field: 0x%02x", daf);
|
|
proto_tree_add_uint_format(tree, hf_sna_th_oaf , NullTVB,offset+3, 1, oaf,
|
|
"Origin Address Field: 0x%02x", oaf);
|
|
proto_tree_add_uint(tree, hf_sna_th_snf , NullTVB,offset+4, 2, snf);
|
|
|
|
return bytes_in_header;
|
|
}
|
|
|
|
/* FID Type 3 */
|
|
static int
|
|
dissect_fid3 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
proto_tree *bf_tree;
|
|
proto_item *bf_item;
|
|
guint8 th_0;
|
|
guint8 lsid;
|
|
|
|
static int bytes_in_header = 2;
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, bytes_in_header)) {
|
|
return 0;
|
|
}
|
|
|
|
if (!tree) {
|
|
return bytes_in_header;
|
|
}
|
|
|
|
th_0 = pd[offset+0];
|
|
lsid = pd[offset+1];
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_th_0, NullTVB, offset, 1, th_0);
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_fid, NullTVB, offset, 1, th_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_mpf, NullTVB, offset, 1, th_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_efi , NullTVB,offset, 1, th_0);
|
|
|
|
proto_tree_add_uint(tree, hf_sna_th_lsid , NullTVB,offset+1, 1, lsid);
|
|
|
|
return bytes_in_header;
|
|
}
|
|
|
|
/* FID Type 4 */
|
|
|
|
gchar *
|
|
sna_fid_type_4_addr_to_str(const struct sna_fid_type_4_addr *addrp)
|
|
{
|
|
static gchar str[3][14];
|
|
static gchar *cur;
|
|
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
|
|
sprintf(cur, "%08X.%04X", addrp->saf, addrp->ef);
|
|
return cur;
|
|
}
|
|
|
|
static int
|
|
dissect_fid4 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
proto_tree *bf_tree;
|
|
proto_item *bf_item;
|
|
guint8 th_byte, mft;
|
|
guint16 th_word;
|
|
guint16 def, oef, snf, dcf;
|
|
guint32 dsaf, osaf;
|
|
static struct sna_fid_type_4_addr src, dst;
|
|
|
|
static int bytes_in_header = 26;
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, bytes_in_header)) {
|
|
return 0;
|
|
}
|
|
|
|
dsaf = pntohl(&pd[offset+8]);
|
|
osaf = pntohl(&pd[offset+12]);
|
|
def = pntohs(&pd[offset+18]);
|
|
oef = pntohs(&pd[offset+20]);
|
|
snf = pntohs(&pd[offset+22]);
|
|
dcf = pntohs(&pd[offset+24]);
|
|
|
|
/* Addresses in FID 4 are discontiguous, sigh */
|
|
src.saf = osaf;
|
|
src.ef = oef;
|
|
dst.saf = dsaf;
|
|
dst.ef = def;
|
|
SET_ADDRESS(&pi.net_src, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
|
|
(guint8 *)&src);
|
|
SET_ADDRESS(&pi.src, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
|
|
(guint8 *)&src);
|
|
SET_ADDRESS(&pi.net_dst, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
|
|
(guint8 *)&dst);
|
|
SET_ADDRESS(&pi.dst, AT_SNA, SNA_FID_TYPE_4_ADDR_LEN,
|
|
(guint8 *)&dst);
|
|
|
|
if (!tree) {
|
|
return bytes_in_header;
|
|
}
|
|
|
|
th_byte = pd[offset];
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_th_0, NullTVB, offset, 1, th_byte);
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
/* Byte 0 */
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_fid, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_tg_sweep, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_er_vr_supp_ind, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_vr_pac_cnt_ind, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_ntwk_prty, NullTVB, offset, 1, th_byte);
|
|
|
|
offset += 1;
|
|
th_byte = pd[offset];
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_text(tree, NullTVB, offset, 1, "Transmision Header Byte 1");
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
/* Byte 1 */
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_tgsf, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_th_mft, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_piubf, NullTVB, offset, 1, th_byte);
|
|
|
|
mft = th_byte & 0x04;
|
|
offset += 1;
|
|
th_byte = pd[offset];
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_text(tree, NullTVB, offset, 1, "Transmision Header Byte 2");
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
/* Byte 2 */
|
|
if (mft) {
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_nlpoi, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_nlp_cp, NullTVB, offset, 1, th_byte);
|
|
}
|
|
else {
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_iern, NullTVB, offset, 1, th_byte);
|
|
}
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_ern, NullTVB, offset, 1, th_byte);
|
|
|
|
offset += 1;
|
|
th_byte = pd[offset];
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_text(tree, NullTVB, offset, 1, "Transmision Header Byte 3");
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
/* Byte 3 */
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_vrn, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_tpf, NullTVB, offset, 1, th_byte);
|
|
|
|
offset += 1;
|
|
th_word = pntohs(&pd[offset]);
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_text(tree, NullTVB, offset, 2, "Transmision Header Bytes 4-5");
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
/* Bytes 4-5 */
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_vr_cwi, NullTVB, offset, 2, th_word);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_th_tg_nonfifo_ind, NullTVB, offset, 2, th_word);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_vr_sqti, NullTVB, offset, 2, th_word);
|
|
|
|
/* I'm not sure about byte-order on this one... */
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_tg_snf, NullTVB, offset, 2, th_word);
|
|
|
|
offset += 2;
|
|
th_word = pntohs(&pd[offset]);
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_text(tree, NullTVB, offset, 2, "Transmision Header Bytes 6-7");
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
/* Bytes 6-7 */
|
|
proto_tree_add_boolean(bf_tree, hf_sna_th_vrprq, NullTVB, offset, 2, th_word);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_th_vrprs, NullTVB, offset, 2, th_word);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_vr_cwri, NullTVB, offset, 2, th_word);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_th_vr_rwi, NullTVB, offset, 2, th_word);
|
|
|
|
/* I'm not sure about byte-order on this one... */
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_vr_snf_send, NullTVB, offset, 2, th_word);
|
|
|
|
offset += 2;
|
|
|
|
/* Bytes 8-11 */
|
|
proto_tree_add_uint(tree, hf_sna_th_dsaf, NullTVB, offset, 4, dsaf);
|
|
|
|
offset += 4;
|
|
|
|
/* Bytes 12-15 */
|
|
proto_tree_add_uint(tree, hf_sna_th_osaf, NullTVB, offset, 4, osaf);
|
|
|
|
offset += 4;
|
|
th_byte = pd[offset];
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_text(tree, NullTVB, offset, 2, "Transmision Header Byte 16");
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
/* Byte 16 */
|
|
proto_tree_add_boolean(tree, hf_sna_th_snai, NullTVB, offset, 1, th_byte);
|
|
|
|
/* We luck out here because in their infinite wisdom the SNA
|
|
* architects placed the MPF and EFI fields in the same bitfield
|
|
* locations, even though for FID4 they're not in byte 0.
|
|
* Thank you IBM! */
|
|
proto_tree_add_uint(tree, hf_sna_th_mpf, NullTVB, offset, 1, th_byte);
|
|
proto_tree_add_uint(tree, hf_sna_th_efi, NullTVB, offset, 1, th_byte);
|
|
|
|
offset += 2; /* 1 for byte 16, 1 for byte 17 which is reserved */
|
|
|
|
/* Bytes 18-25 */
|
|
proto_tree_add_uint(tree, hf_sna_th_def, NullTVB, offset+0, 2, def);
|
|
proto_tree_add_uint(tree, hf_sna_th_oef, NullTVB, offset+2, 2, oef);
|
|
proto_tree_add_uint(tree, hf_sna_th_snf, NullTVB, offset+4, 2, snf);
|
|
proto_tree_add_uint(tree, hf_sna_th_snf, NullTVB, offset+6, 2, dcf);
|
|
|
|
return bytes_in_header;
|
|
}
|
|
|
|
/* FID Type 5 */
|
|
static int
|
|
dissect_fid5 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
proto_tree *bf_tree;
|
|
proto_item *bf_item;
|
|
guint8 th_0;
|
|
guint16 snf;
|
|
|
|
static int bytes_in_header = 12;
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, bytes_in_header)) {
|
|
return 0;
|
|
}
|
|
|
|
th_0 = pd[offset+0];
|
|
snf = pntohs(&pd[offset+2]);
|
|
|
|
if (!tree) {
|
|
return bytes_in_header;
|
|
}
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_th_0, NullTVB, offset, 1, th_0);
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_fid, NullTVB, offset, 1, th_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_mpf, NullTVB, offset, 1, th_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_efi, NullTVB, offset, 1, th_0);
|
|
|
|
proto_tree_add_text(tree, NullTVB, offset+1, 1, "Reserved");
|
|
proto_tree_add_uint(tree, hf_sna_th_snf, NullTVB, offset+2, 2, snf);
|
|
|
|
proto_tree_add_bytes(tree, hf_sna_th_sa, NullTVB, offset+4, 8, &pd[offset+4]);
|
|
|
|
return bytes_in_header;
|
|
|
|
}
|
|
|
|
/* FID Type f */
|
|
static int
|
|
dissect_fidf (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
proto_tree *bf_tree;
|
|
proto_item *bf_item;
|
|
guint8 th_0, cmd_fmt, cmd_type;
|
|
guint16 cmd_sn, dcf;
|
|
|
|
static int bytes_in_header = 26;
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, bytes_in_header)) {
|
|
return 0;
|
|
}
|
|
|
|
th_0 = pd[offset+0];
|
|
cmd_fmt = pd[offset+2];
|
|
cmd_type = pd[offset+3];
|
|
cmd_sn = pntohs(&pd[offset+4]);
|
|
|
|
/* Yup, bytes 6-23 are reserved! */
|
|
dcf = pntohs(&pd[offset+24]);
|
|
|
|
if (!tree) {
|
|
return bytes_in_header;
|
|
}
|
|
|
|
/* Create the bitfield tree */
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_th_0, NullTVB, offset, 1, th_0);
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_th_fid);
|
|
|
|
proto_tree_add_uint(bf_tree, hf_sna_th_fid, NullTVB, offset, 1, th_0);
|
|
proto_tree_add_text(tree, NullTVB, offset+1, 1, "Reserved");
|
|
|
|
proto_tree_add_uint(tree, hf_sna_th_cmd_fmt, NullTVB, offset+2, 1, cmd_fmt);
|
|
proto_tree_add_uint(tree, hf_sna_th_cmd_type, NullTVB, offset+3, 1, cmd_type);
|
|
proto_tree_add_uint(tree, hf_sna_th_cmd_sn, NullTVB, offset+4, 2, cmd_sn);
|
|
|
|
proto_tree_add_text(tree, NullTVB, offset+6, 18, "Reserved");
|
|
|
|
proto_tree_add_uint(tree, hf_sna_th_dcf, NullTVB, offset+24, 8, dcf);
|
|
|
|
return bytes_in_header;
|
|
}
|
|
|
|
|
|
/* RH */
|
|
static void
|
|
dissect_rh (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
|
|
|
|
proto_tree *bf_tree;
|
|
proto_item *bf_item;
|
|
gboolean is_response;
|
|
guint8 rh_0, rh_1, rh_2;
|
|
|
|
rh_0 = pd[offset+0];
|
|
rh_1 = pd[offset+1];
|
|
rh_2 = pd[offset+2];
|
|
|
|
is_response = (rh_0 & 0x80);
|
|
|
|
/* Create the bitfield tree for byte 0*/
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_rh_0, NullTVB, offset, 1, rh_0);
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_rh_0);
|
|
|
|
proto_tree_add_uint(bf_tree, hf_sna_rh_rri, NullTVB, offset, 1, rh_0);
|
|
proto_tree_add_uint(bf_tree, hf_sna_rh_ru_category, NullTVB, offset, 1, rh_0);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_fi, NullTVB, offset, 1, rh_0);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_sdi, NullTVB, offset, 1, rh_0);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_bci, NullTVB, offset, 1, rh_0);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_eci, NullTVB, offset, 1, rh_0);
|
|
|
|
offset += 1;
|
|
|
|
/* Create the bitfield tree for byte 1*/
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_rh_1, NullTVB, offset, 1, rh_1);
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_rh_1);
|
|
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_dr1, NullTVB, offset, 1, rh_1);
|
|
|
|
if (!is_response) {
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_lcci, NullTVB, offset, 1, rh_1);
|
|
}
|
|
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_dr2, NullTVB, offset, 1, rh_1);
|
|
|
|
if (is_response) {
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_rti, NullTVB, offset, 1, rh_1);
|
|
}
|
|
else {
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_eri, NullTVB, offset, 1, rh_1);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_rlwi, NullTVB, offset, 1, rh_1);
|
|
}
|
|
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_qri, NullTVB, offset, 1, rh_1);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_pi, NullTVB, offset, 1, rh_1);
|
|
|
|
offset += 1;
|
|
|
|
/* Create the bitfield tree for byte 2*/
|
|
bf_item = proto_tree_add_uint(tree, hf_sna_rh_2, NullTVB, offset, 1, rh_2);
|
|
|
|
if (!is_response) {
|
|
bf_tree = proto_item_add_subtree(bf_item, ett_sna_rh_2);
|
|
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_bbi, NullTVB, offset, 1, rh_2);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_ebi, NullTVB, offset, 1, rh_2);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_cdi, NullTVB, offset, 1, rh_2);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_csi, NullTVB, offset, 1, rh_2);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_edi, NullTVB, offset, 1, rh_2);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_pdi, NullTVB, offset, 1, rh_2);
|
|
proto_tree_add_boolean(bf_tree, hf_sna_rh_cebi, NullTVB, offset, 1, rh_2);
|
|
}
|
|
|
|
/* XXX - check for sdi. If TRUE, the next 4 bytes will be sense data */
|
|
}
|
|
|
|
void
|
|
proto_register_sna(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_sna_th,
|
|
{ "Transmission Header", "sna.th", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_0,
|
|
{ "Transmission Header Byte 0", "sna.th.0", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"Byte 0 of Tranmission Header contains FID, MPF, ODAI,"
|
|
" and EFI as bitfields." }},
|
|
|
|
{ &hf_sna_th_fid,
|
|
{ "Format Identifer", "sna.th.fid", FT_UINT8, BASE_HEX, VALS(sna_th_fid_vals), 0xf0,
|
|
"Format Identification" }},
|
|
|
|
{ &hf_sna_th_mpf,
|
|
{ "Mapping Field", "sna.th.mpf", FT_UINT8, BASE_NONE, VALS(sna_th_mpf_vals), 0x0c,
|
|
"The Mapping Field specifies whether the information field"
|
|
" associated with the TH is a complete or partial BIU." }},
|
|
|
|
{ &hf_sna_th_odai,
|
|
{ "ODAI Assignment Indicator", "sna.th.odai", FT_UINT8, BASE_DEC, NULL, 0x02,
|
|
"The ODAI indicates which node assigned the OAF'-DAF' values"
|
|
" carried in the TH." }},
|
|
|
|
{ &hf_sna_th_efi,
|
|
{ "Expedited Flow Indicator", "sna.th.efi", FT_UINT8, BASE_DEC, VALS(sna_th_efi_vals), 0x01,
|
|
"The EFI designates whether the PIU belongs to the normal"
|
|
" or expedited flow." }},
|
|
|
|
{ &hf_sna_th_daf,
|
|
{ "Destination Address Field", "sna.th.daf", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_oaf,
|
|
{ "Origin Address Field", "sna.th.oaf", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_snf,
|
|
{ "Sequence Number Field", "sna.th.snf", FT_UINT16, BASE_NONE, NULL, 0x0,
|
|
"The Sequence Number Field contains a numerical identifier for"
|
|
" the associated BIU."}},
|
|
|
|
{ &hf_sna_th_dcf,
|
|
{ "Data Count Field", "sna.th.dcf", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"A binary count of the number of bytes in the BIU or BIU segment associated "
|
|
"with the tranmission header. The count does not include any of the bytes "
|
|
"in the transmission header."}},
|
|
|
|
{ &hf_sna_th_lsid,
|
|
{ "Local Session Identification", "sna.th.lsid", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_tg_sweep,
|
|
{ "Transmission Group Sweep", "sna.th.tg_sweep", FT_UINT8, BASE_DEC,
|
|
VALS(sna_th_tg_sweep_vals), 0x08,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_er_vr_supp_ind,
|
|
{ "ER and VR Support Indicator", "sna.th.er_vr_supp_ind", FT_UINT8, BASE_DEC,
|
|
VALS(sna_th_er_vr_supp_ind_vals), 0x04,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_vr_pac_cnt_ind,
|
|
{ "Virtual Route Pacing Count Indicator", "sna.th.vr_pac_cnt_ind",
|
|
FT_UINT8, BASE_DEC, VALS(sna_th_vr_pac_cnt_ind_vals), 0x02,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_ntwk_prty,
|
|
{ "Network Priority", "sna.th.ntwk_prty",
|
|
FT_UINT8, BASE_DEC, VALS(sna_th_ntwk_prty_vals), 0x01,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_tgsf,
|
|
{ "Transmission Group Segmenting Field", "sna.th.tgsf",
|
|
FT_UINT8, BASE_HEX, VALS(sna_th_tgsf_vals), 0xc0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_mft,
|
|
{ "MPR FID4 Type", "sna.th.mft", FT_BOOLEAN, BASE_NONE, NULL, 0x04,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_piubf,
|
|
{ "PIU Blocking Field", "sna.th.piubf", FT_UINT8, BASE_HEX,
|
|
VALS(sna_th_piubf_vals), 0x03,
|
|
"Specifies whether this frame contains a single PIU or multiple PIUs." }},
|
|
|
|
{ &hf_sna_th_iern,
|
|
{ "Initial Explicit Route Number", "sna.th.iern", FT_UINT8, BASE_DEC, NULL, 0xf0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_nlpoi,
|
|
{ "NLP Offset Indicator", "sna.th.nlpoi", FT_UINT8, BASE_DEC,
|
|
VALS(sna_th_nlpoi_vals), 0x80,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_nlp_cp,
|
|
{ "NLP Count or Padding", "sna.th.nlp_cp", FT_UINT8, BASE_DEC, NULL, 0x70,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_ern,
|
|
{ "Explicit Route Number", "sna.th.ern", FT_UINT8, BASE_DEC, NULL, 0x0f,
|
|
"The ERN in a TH identifies an explicit route direction of flow." }},
|
|
|
|
{ &hf_sna_th_vrn,
|
|
{ "Virtual Route Number", "sna.th.vrn", FT_UINT8, BASE_DEC, NULL, 0xf0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_tpf,
|
|
{ "Transmission Priority Field", "sna.th.tpf", FT_UINT8, BASE_HEX,
|
|
VALS(sna_th_tpf_vals), 0x03,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_vr_cwi,
|
|
{ "Virtual Route Change Window Indicator", "sna.th.vr_cwi", FT_UINT16, BASE_DEC,
|
|
VALS(sna_th_vr_cwi_vals), 0x8000,
|
|
"Used to change the window size of the virtual route by 1." }},
|
|
|
|
{ &hf_sna_th_tg_nonfifo_ind,
|
|
{ "Transmission Group Non-FIFO Indicator", "sna.th.tg_nonfifo_ind", FT_BOOLEAN, 16,
|
|
TFS(&sna_th_tg_nonfifo_ind_truth), 0x4000,
|
|
"Indicates whether or not FIFO discipline is to enforced in "
|
|
"transmitting PIUs through the tranmission groups to prevent the PIUs "
|
|
"getting out of sequence during transmission over the TGs." }},
|
|
|
|
{ &hf_sna_th_vr_sqti,
|
|
{ "Virtual Route Sequence and Type Indicator", "sna.th.vr_sqti", FT_UINT16, BASE_HEX,
|
|
VALS(sna_th_vr_sqti_vals), 0x3000,
|
|
"Specifies the PIU type." }},
|
|
|
|
{ &hf_sna_th_tg_snf,
|
|
{ "Transmission Group Sequence Number Field", "sna.th.tg_snf", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0fff,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_vrprq,
|
|
{ "Virtual Route Pacing Request", "sna.th.vrprq", FT_BOOLEAN, 16,
|
|
TFS(&sna_th_vrprq_truth), 0x8000,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_vrprs,
|
|
{ "Virtual Route Pacing Response", "sna.th.vrprs", FT_BOOLEAN, 16,
|
|
TFS(&sna_th_vrprs_truth), 0x4000,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_vr_cwri,
|
|
{ "Virtual Route Change Window Reply Indicator", "sna.th.vr_cwri", FT_UINT16, BASE_DEC,
|
|
VALS(sna_th_vr_cwri_vals), 0x2000,
|
|
"Permits changing of the window size by 1 for PIUs received by the "
|
|
"sender of this bit." }},
|
|
|
|
{ &hf_sna_th_vr_rwi,
|
|
{ "Virtual Route Reset Window Indicator", "sna.th.vr_rwi", FT_BOOLEAN, 16,
|
|
TFS(&sna_th_vr_rwi_truth), 0x1000,
|
|
"Indicates severe congestion in a node on the virtual route." }},
|
|
|
|
{ &hf_sna_th_vr_snf_send,
|
|
{ "Virtual Route Send Sequence Number Field", "sna.th.vr_snf_send", FT_UINT16, BASE_DEC,
|
|
NULL, 0x0fff,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_dsaf,
|
|
{ "Destination Subarea Address Field", "sna.th.dsaf", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_osaf,
|
|
{ "Origin Subarea Address Field", "sna.th.osaf", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_snai,
|
|
{ "SNA Indicator", "sna.th.snai", FT_BOOLEAN, 8, NULL, 0x10,
|
|
"Used to identify whether the PIU originated or is destined for "
|
|
"an SNA or non-SNA device." }},
|
|
|
|
{ &hf_sna_th_def,
|
|
{ "Destination Element Field", "sna.th.def", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_oef,
|
|
{ "Origin Element Field", "sna.th.oef", FT_UINT16, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_sa,
|
|
{ "Session Address", "sna.th.sa", FT_BYTES, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_cmd_fmt,
|
|
{ "Command Format", "sna.th.cmd_fmt", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_cmd_type,
|
|
{ "Command Type", "sna.th.cmd_type", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_th_cmd_sn,
|
|
{ "Command Sequence Number", "sna.th.cmd_sn", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
|
|
|
|
{ &hf_sna_rh,
|
|
{ "Request/Response Header", "sna.rh", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_0,
|
|
{ "Request/Response Header Byte 0", "sna.rh.0", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_1,
|
|
{ "Request/Response Header Byte 1", "sna.rh.1", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_2,
|
|
{ "Request/Response Header Byte 2", "sna.rh.2", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_rri,
|
|
{ "Request/Response Indicator", "sna.rh.rri", FT_UINT8, BASE_DEC, VALS(sna_rh_rri_vals), 0x80,
|
|
"Denotes whether this is a request or a response." }},
|
|
|
|
{ &hf_sna_rh_ru_category,
|
|
{ "Request/Response Unit Category", "sna.rh.ru_category", FT_UINT8, BASE_HEX,
|
|
VALS(sna_rh_ru_category_vals), 0x60,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_fi,
|
|
{ "Format Indicator", "sna.rh.fi", FT_BOOLEAN, 8, TFS(&sna_rh_fi_truth), 0x08,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_sdi,
|
|
{ "Sense Data Included", "sna.rh.sdi", FT_BOOLEAN, 8, TFS(&sna_rh_sdi_truth), 0x04,
|
|
"Indicates that a 4-byte sense data field is included in the associated RU." }},
|
|
|
|
{ &hf_sna_rh_bci,
|
|
{ "Begin Chain Indicator", "sna.rh.bci", FT_BOOLEAN, 8, TFS(&sna_rh_bci_truth), 0x02,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_eci,
|
|
{ "End Chain Indicator", "sna.rh.eci", FT_BOOLEAN, 8, TFS(&sna_rh_eci_truth), 0x01,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_dr1,
|
|
{ "Definite Response 1 Indicator", "sna.rh.dr1", FT_BOOLEAN, 8, NULL, 0x80,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_lcci,
|
|
{ "Length-Checked Compression Indicator", "sna.rh.lcci", FT_BOOLEAN, 8,
|
|
TFS(&sna_rh_lcci_truth), 0x40,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_dr2,
|
|
{ "Definite Response 2 Indicator", "sna.rh.dr2", FT_BOOLEAN, 8, NULL, 0x20,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_eri,
|
|
{ "Exception Response Indicator", "sna.rh.eri", FT_BOOLEAN, 8, NULL, 0x10,
|
|
"Used in conjunction with DR1I and DR2I to indicate, in a request, "
|
|
"the form of response requested." }},
|
|
|
|
{ &hf_sna_rh_rti,
|
|
{ "Response Type Indicator", "sna.rh.rti", FT_BOOLEAN, 8, TFS(&sna_rh_rti_truth), 0x10,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_rlwi,
|
|
{ "Request Larger Window Indicator", "sna.rh.rlwi", FT_BOOLEAN, 8, NULL, 0x04,
|
|
"Indicates whether a larger pacing window was requested." }},
|
|
|
|
{ &hf_sna_rh_qri,
|
|
{ "Queued Response Indicator", "sna.rh.qri", FT_BOOLEAN, 8, TFS(&sna_rh_qri_truth), 0x02,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_pi,
|
|
{ "Pacing Indicator", "sna.rh.pi", FT_BOOLEAN, 8, NULL, 0x01,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_bbi,
|
|
{ "Begin Bracket Indicator", "sna.rh.bbi", FT_BOOLEAN, 8, NULL, 0x80,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_ebi,
|
|
{ "End Bracket Indicator", "sna.rh.ebi", FT_BOOLEAN, 8, NULL, 0x40,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_cdi,
|
|
{ "Change Direction Indicator", "sna.rh.cdi", FT_BOOLEAN, 8, NULL, 0x20,
|
|
"" }},
|
|
|
|
{ &hf_sna_rh_csi,
|
|
{ "Code Selection Indicator", "sna.rh.csi", FT_BOOLEAN, 8, VALS(sna_rh_csi_vals), 0x08,
|
|
"Specifies the encoding used for the associated FMD RU." }},
|
|
|
|
{ &hf_sna_rh_edi,
|
|
{ "Enciphered Data Indicator", "sna.rh.edi", FT_BOOLEAN, 8, NULL, 0x04,
|
|
"Indicates that information in the associated RU is enciphered under "
|
|
"session-level cryptography protocols." }},
|
|
|
|
{ &hf_sna_rh_pdi,
|
|
{ "Padded Data Indicator", "sna.rh.pdi", FT_BOOLEAN, 8, NULL, 0x02,
|
|
"Indicates that the RU was padded at the end, before encipherment, to the next "
|
|
"integral multiple of 8 bytes." }},
|
|
|
|
{ &hf_sna_rh_cebi,
|
|
{ "Conditional End Bracket Indicator", "sna.rh.cebi", FT_BOOLEAN, 8, NULL, 0x01,
|
|
"Used to indicate the beginning or end of a group of exchanged "
|
|
"requests and responses called a bracket. Only used on LU-LU sessions." }},
|
|
|
|
{ &hf_sna_ru,
|
|
{ "Request/Response Unit", "sna.ru", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
""}},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_sna,
|
|
&ett_sna_th,
|
|
&ett_sna_th_fid,
|
|
&ett_sna_rh,
|
|
&ett_sna_rh_0,
|
|
&ett_sna_rh_1,
|
|
&ett_sna_rh_2,
|
|
};
|
|
|
|
proto_sna = proto_register_protocol("Systems Network Architecture", "sna");
|
|
proto_register_field_array(proto_sna, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_sna(void)
|
|
{
|
|
old_dissector_add("llc.dsap", SAP_SNA_PATHCTRL, dissect_sna);
|
|
}
|