Start of a Radio Signalling Link (RSL) dissector (3GPP TS 48.058).
svn path=/trunk/; revision=22919
This commit is contained in:
Anders Broman
parent
2b33ee2fd1
commit
b3a1afa6ac
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/* packet-rsl.c
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* Routines for Radio Signalling Link (RSL) dissection.
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*
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* Copyright 2007, Anders Broman <anders.broman@ericsson.com>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-cops.c
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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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* REF: 3GPP TS 48.058 version 6.1.0 Release 6
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* http://www.3gpp.org/ftp/Specs/html-info/48058.htm
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*
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <epan/packet.h>
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#include <epan/proto.h>
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#include <epan/lapd_sapi.h>
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/* Initialize the protocol and registered fields */
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static int proto_rsl = -1;
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static int hf_rsl_msg_type = -1;
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static int hf_rsl_T_bit = -1;
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static int hf_rsl_msg_dsc = -1;
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static int hf_rsl_ie_id = -1;
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static int hf_rsl_ie_length = -1;
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static int hf_rsl_ch_no_Cbits = -1;
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static int hf_rsl_ch_no_TN = -1;
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static int hf_rsl_acc_delay = -1;
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static int hf_rsl_req_ref_ra = -1;
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static int hf_rsl_req_ref_T1prim = -1;
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static int hf_rsl_req_ref_T3 = -1;
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static int hf_rsl_req_ref_T2 = -1;
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static int hf_rsl_phy_ctx = -1;
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static int hf_rsl_na = -1;
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static int hf_rsl_ch_type = -1;
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static int hf_rsl_prio = -1;
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static int hf_rsl_sapi = -1;
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static int hf_rsl_cause = -1;
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static int hf_rsl_rel_mode = -1;
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/* Initialize the subtree pointers */
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static int ett_rsl = -1;
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static int ett_ie_ch_no = -1;
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static int ett_ie_phy_ctx = -1;
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static int ett_ie_access_delay = -1;
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static int ett_ie_req_ref = -1;
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static int ett_ie_full_imm_ass_inf = -1;
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proto_tree *top_tree;
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dissector_handle_t gsm_a_ccch_handle = NULL;
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dissector_handle_t gsm_a_dtap_handle = NULL;
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static const true_false_string rsl_t_bit_vals = {
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"Considered transparent by BTS",
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"Not considered transparent by BTS"
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};
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static const true_false_string rsl_na_vals = {
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"Applicable",
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"Not Applicable"
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};
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/*
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* 9.1 Message discriminator
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*/
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static const value_string rsl_msg_disc_vals[] = {
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{ 0x00, "Reserved" },
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{ 0x01, "Radio Link Layer Management messages" },
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{ 0x04, "Dedicated Channel Management messages" },
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{ 0x06, "Common Channel Management messages" },
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{ 0x08, "TRX Management messages" },
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{ 0x16, "Location Services messages" },
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{ 0, NULL }
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};
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/*
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* 9.2 MESSAGE TYPE
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*/
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#define RSL_MSG_TYPE_DATA_REQ 1
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#define RSL_MSG_TYPE_DATA_IND 2
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#define RSL_MSG_TYPE_ERROR_IND 3
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#define RSL_MSG_TYPE_EST_REQ 4
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#define RSL_MSG_TYPE_EST_CONF 5
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#define RSL_MSG_EST_IND 6
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#define RSL_MSG_REL_REQ 7
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#define RSL_MSG_REL_CONF 8
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#define RSL_MSG_REL_IND 9
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#define RSL_MSG_UNIT_DATA_REQ 10
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#define RSL_MSG_CHANRQD 19
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#define RSL_MSG_IMM_ASS_CMD 22
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static const value_string rsl_msg_type_vals[] = {
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/* 0 0 0 0 - - - - Radio Link Layer Management messages: */
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{ 0x01, "DATA REQuest" }, /* 8.3.1 */
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{ 0x02, "DATA INDication" }, /* 8.3.2 */
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{ 0x03, "ERROR INDication" }, /* 8.3.3 */
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{ 0x04, "ESTablish REQuest" }, /* 8.3.4 */
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{ 0x05, "ESTablish CONFirm" }, /* 8.3.5 */
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{ 0x06, "ESTablish INDication" }, /* 8.3.6 */
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{ 0x07, "RELease REQuest" }, /* 8.3.7 */
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{ 0x08, "RELease CONFirm" }, /* 8.3.8 */
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{ 0x09, "RELease INDication" }, /* 8.3.9 */
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{ 0x0a, "UNIT DATA REQuest" }, /* 8.3.10 */
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/* 0 0 0 1 - - - - Common Channel Management/TRX Management messages: */
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{ 0x11, "BCCH INFOrmation" }, /* 8.5.1 */
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{ 0x12, "CCCH LOAD INDication" }, /* 8.5.2 */
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{ 0x13, "CHANnel ReQuireD" }, /* 8.5.3 */
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{ 0x14, "DELETE INDication" }, /* 8.5.4 */
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{ 0x15, "PAGING CoMmanD" }, /* 8.5.5 */
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{ 0x16, "IMMEDIATE ASSIGN COMMAND" }, /* 8.5.6 */
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{ 0x17, "SMS BroadCast REQuest" }, /* 8.5.7 */
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{ 0x18, "RF RESource INDication" }, /* 8.6.1 */
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{ 0x19, "SACCH FILLing" }, /* 8.6.2 */
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{ 0x1b, "OVERLOAD" }, /* 8.6.3 */
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{ 0x1c, "ERROR REPORT" }, /* 8.6.4 */
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{ 0x1d, "SMS BroadCast CoMmanD" }, /* 8.5.8 */
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{ 0x1e, "CBCH LOAD INDication" }, /* 8.5.9 */
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{ 0x1f, "NOTification CoMmanD" }, /* 8.5.10 */
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/* 0 0 1 - - - - - Dedicated Channel Management messages: */
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{ 0x21, "CHANnel ACTIVation" }, /* 8.4.1 */
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{ 0x22, "CHANnel ACTIVation ACKnowledge" }, /* 8.4.2 */
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{ 0x23, "CHANnel ACTIVation Negative ACK" }, /* 8.4.3 */
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{ 0x24, "CONNection FAILure" }, /* 8.4.4 */
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{ 0x25, "DEACTIVATE SACCH" }, /* 8.4.5 */
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{ 0x26, "ENCRyption CoMmanD" }, /* 8.4.6 */
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{ 0x27, "HANDOver DETection" }, /* 8.4.7 */
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{ 0x28, "MEASurement RESult" }, /* 8.4.8 */
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{ 0x29, "MODE MODIFY REQuest" }, /* 8.4.9 */
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{ 0x2a, "MODE MODIFY ACKnowledge" }, /* 8.4.10 */
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{ 0x2b, "MODE MODIFY Negative ACKnowledge" }, /* 8.4.11 */
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{ 0x2c, "PHYsical CONTEXT REQuest" }, /* 8.4.12 */
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{ 0x2d, "PHYsical CONTEXT CONFirm" }, /* 8.4.13 */
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{ 0x2e, "RF CHANnel RELease" }, /* 8.4.14 */
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{ 0x2f, "MS POWER CONTROL" }, /* 8.4.15 */
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{ 0x30, "BS POWER CONTROL" }, /* 8.4.16 */
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{ 0x31, "PREPROCess CONFIGure" }, /* 8.4.17 */
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{ 0x32, "PREPROCessed MEASurement RESult" }, /* 8.4.18 */
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{ 0x33, "RF CHANnel RELease ACKnowledge" }, /* 8.4.19 */
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{ 0x34, "SACCH INFO MODIFY" }, /* 8.4.20 */
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{ 0x35, "TALKER DETection" }, /* 8.4.21 */
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{ 0x36, "LISTENER DETection" }, /* 8.4.22 */
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{ 0x37, "REMOTE CODEC CONFiguration REPort" }, /* 8.4.23 */
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{ 0x38, "Round Trip Delay REPort" }, /* 8.4.24 */
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{ 0x39, "PRE-HANDOver NOTIFication" }, /* 8.4.25 */
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{ 0x3a, "MultiRate CODEC MODification REQest" }, /* 8.4.26 */
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{ 0x3b, "MultiRate CODEC MOD ACKnowledge" }, /* 8.4.27 */
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{ 0x3c, "MultiRate CODEC MOD Negative ACKnowledge" }, /* 8.4.28 */
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{ 0x3d, "MultiRate CODEC MOD PERformed" }, /* 8.4.29 */
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{ 0x3e, "TFO REPort" }, /* 8.4.30 */
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{ 0x3f, "TFO MODification REQuest" }, /* 8.4.31 */
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/* 0 1 - - - - - - Location Services messages: */
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{ 0x41, "Location Information" }, /* 8.7.1 */
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{ 0, NULL }
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};
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static const value_string rsl_ie_type_vals[] = {
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{ 0x01, "Channel Number" }, /* 9.3.1 */
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{ 0x02, "Link Identifier" }, /* 9.3.2 */
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{ 0x03, "Activation Type" }, /* 9.3.3 */
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{ 0x04, "BS Power" }, /* 9.3.4 */
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{ 0x05, "Channel Identification" }, /* 9.3.5 */
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{ 0x06, "Channel Mode" }, /* 9.3.6 */
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{ 0x07, "Encryption Information" }, /* 9.3.7 */
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{ 0x08, "Frame Number" }, /* 9.3.8 */
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{ 0x09, "Handover Reference" }, /* 9.3.9 */
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{ 0x0a, "L1 Information" }, /* 9.3.10 */
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{ 0x0b, "L3 Information" }, /* 9.3.11 */
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{ 0x0c, "MS Identity" }, /* 9.3.12 */
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{ 0x0d, "MS Power" }, /* 9.3.13 */
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{ 0x0e, "Paging Group" }, /* 9.3.14 */
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{ 0x0f, "Paging Load" }, /* 9.3.15 */
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{ 0x10, "Physical Context" }, /* 9.3.16 */
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{ 0x11, "Access Delay" }, /* 9.3.17 */
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{ 0x12, "RACH Load" }, /* 9.3.18 */
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{ 0x13, "Request Reference" }, /* 9.3.19 */
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{ 0x14, "Release Mode" }, /* 9.3.20 */
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{ 0x15, "Resource Information" }, /* 9.3.21 */
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{ 0x16, "RLM Cause" }, /* 9.3.22 */
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{ 0x17, "Starting Time" }, /* 9.3.23 */
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{ 0x18, "Timing Advance" }, /* 9.3.24 */
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{ 0x19, "Uplink Measurements" }, /* 9.3.25 */
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{ 0x1a, "Cause" }, /* 9.3.26 */
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{ 0x1b, "Measurement result number" }, /* 9.3.27 */
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{ 0x1c, "Message Identifier" }, /* 9.3.28 */
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{ 0x1d, "reserved" }, /* */
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{ 0x1e, "System Info Type" }, /* 9.3.30 */
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{ 0x1f, "MS Power Parameters" }, /* 9.3.31 */
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{ 0x20, "BS Power Parameters" }, /* 9.3.32 */
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{ 0x21, "Pre-processing Parameters" }, /* 9.3.33 */
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{ 0x22, "Pre-processed Measurements" }, /* 9.3.34 */
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{ 0x23, "reserved" }, /* */
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{ 0x24, "SMSCB Information" }, /* 9.3.36 */
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{ 0x25, "MS Timing Offset" }, /* 9.3.37 */
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{ 0x26, "Erroneous Message" }, /* 9.3.38 */
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{ 0x27, "Full BCCH Information" }, /* 9.3.39 */
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{ 0x28, "Channel Needed" }, /* 9.3.40 */
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{ 0x29, "CB Command type" }, /* 9.3.41 */
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{ 0x2a, "SMSCB message" }, /* 9.3.42 */
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{ 0x2b, "Full Immediate Assign Info" }, /* 9.3.35 */
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{ 0x2c, "SACCH Information" }, /* 9.3.29 */
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{ 0x2d, "CBCH Load Information" }, /* 9.3.43 */
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{ 0x2e, "SMSCB Channel Indicator" }, /* 9.3.44 */
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{ 0x2f, "Group call reference" }, /* 9.3.45 */
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{ 0x30, "Channel description" }, /* 9.3.46 */
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{ 0x31, "NCH DRX information" }, /* 9.3.47 */
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{ 0x32, "Command indicator" }, /* 9.3.48 */
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{ 0x33, "eMLPP Priority" }, /* 9.3.49 */
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{ 0x34, "UIC" }, /* 9.3.50 */
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{ 0x35, "Main channel reference" }, /* 9.3.51 */
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{ 0x36, "MultiRate configuration" }, /* 9.3.52 */
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{ 0x37, "MultiRate Control" }, /* 9.3.53 */
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{ 0x38, "Supported Codec Types" }, /* 9.3.54 */
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{ 0x39, "Codec Configuration" }, /* 9.3.55 */
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{ 0x3a, "Round Trip Delay" }, /* 9.3.56 */
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{ 0x3b, "TFO Status" }, /* 9.3.57 */
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{ 0x3c, "LLP APDU" }, /* 9.3.58 */
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{ 0x3d, "TFO transparent container" }, /* 9.3.59 */
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/*
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0 0 1 1 1 1 1 0
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to
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1 1 1 0 1 1 1 1
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Reserved for future use
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1 1 1 1 0 0 0 0
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to
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1 1 1 1 1 1 1 1
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Not used
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*/
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{ 0, NULL }
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};
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/*
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C5 C4 C3 C2 C1
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0 0 0 0 1 Bm + ACCH's
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0 0 0 1 T Lm + ACCH's
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0 0 1 T T SDCCH/4 + ACCH
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0 1 T T T SDCCH/8 + ACCH
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1 0 0 0 0 BCCH
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1 0 0 0 1 Uplink CCCH (RACH)
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1 0 0 1 0 Downlink CCCH (PCH + AGCH)
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*/
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static const value_string rsl_ch_no_Cbits_vals[] = {
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{ 0x01, "Bm + ACCH's" },
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{ 0x03, "Lm + ACCH's" },
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{ 0x03, "Lm + ACCH's" },
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{ 0x04, "SDCCH/4 + ACCH" },
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{ 0x05, "SDCCH/4 + ACCH" },
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{ 0x06, "SDCCH/4 + ACCH" },
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{ 0x07, "SDCCH/4 + ACCH" },
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{ 0x08, "SDCCH/8 + ACCH" },
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{ 0x09, "SDCCH/8 + ACCH" },
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{ 0x0a, "SDCCH/8 + ACCH" },
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{ 0x0b, "SDCCH/8 + ACCH" },
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{ 0x0c, "SDCCH/8 + ACCH" },
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{ 0x0d, "SDCCH/8 + ACCH" },
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{ 0x0e, "SDCCH/8 + ACCH" },
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{ 0x0f, "SDCCH/8 + ACCH" },
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{ 0x10, "BCCH" },
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{ 0x11, "Uplink CCCH (RACH)" },
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{ 0x12, "Downlink CCCH (PCH + AGCH)" },
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{ 0, NULL }
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};
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/* 9.3.1 Channel number 9.3.1 M TV 2 */
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static int
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dissect_rsl_ie_ch_no(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
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{
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proto_item *ti;
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proto_tree *ie_tree;
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ti = proto_tree_add_text(tree, tvb,offset,2,"Channel number IE ");
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ie_tree = proto_item_add_subtree(ti, ett_ie_ch_no);
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/* Element identifier */
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proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
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offset++;
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/* C-bits */
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proto_tree_add_item(ie_tree, hf_rsl_ch_no_Cbits, tvb, offset, 1, FALSE);
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/* TN is time slot number, binary represented as in 3GPP TS 45.002.
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* 3 Bits
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*/
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proto_tree_add_item(ie_tree, hf_rsl_ch_no_TN, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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static const value_string rsl_ch_type_vals[] = {
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{ 0x00, "Main signalling channel (FACCH or SDCCH)" },
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{ 0x01, "SACCH" },
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{ 0, NULL }
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};
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static const value_string rsl_prio_vals[] = {
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{ 0x00, "Normal Priority" },
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{ 0x01, "High Priority" },
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{ 0x02, "Low Priority" },
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{ 0, NULL }
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};
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/*
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* 9.3.2 Link Identifier M TV 2
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*/
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static int
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dissect_rsl_ie_link_id(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
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{
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proto_item *ti;
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proto_tree *ie_tree;
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guint8 octet;
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ti = proto_tree_add_text(tree, tvb,offset,2,"Link Identifier IE ");
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ie_tree = proto_item_add_subtree(ti, ett_ie_phy_ctx);
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/* Element identifier */
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proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
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offset++;
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octet = tvb_get_guint8(tvb,offset);
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if(octet&0x20 == 0x20){
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/* Not applicable */
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proto_tree_add_item(ie_tree, hf_rsl_na, tvb, offset, 1, FALSE);
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return offset++;
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}
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/* channel type */
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proto_tree_add_item(ie_tree, hf_rsl_ch_type, tvb, offset, 1, FALSE);
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/* NA - Not applicable */
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proto_tree_add_item(ie_tree, hf_rsl_na, tvb, offset, 1, FALSE);
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/* Priority */
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proto_tree_add_item(ie_tree, hf_rsl_prio, tvb, offset, 1, FALSE);
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/* SAPI
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* The SAPI field contains the SAPI value as defined in 3GPP TS 44.005.
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*/
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proto_tree_add_item(ie_tree, hf_rsl_sapi, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/*
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* 9.3.11 L3 Information 9.3.11 M TLV >=3
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*
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* This element contains a link layer service data unit (L3 message).
|
||||
* It is used to forward a complete L3 message as specified in
|
||||
* 3GPP TS 24.008 or 3GPP TS 44.018 between BTS and BSC.
|
||||
*/
|
||||
static int
|
||||
dissect_rsl_ie_L3_inf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *ie_tree;
|
||||
tvbuff_t *next_tvb;
|
||||
guint16 length;
|
||||
|
||||
ti = proto_tree_add_text(tree, tvb,offset,0,"L3 Information ");
|
||||
ie_tree = proto_item_add_subtree(ti, ett_ie_phy_ctx);
|
||||
|
||||
/* Element identifier */
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
/* Length */
|
||||
length = tvb_get_ntohs(tvb, offset);
|
||||
proto_item_set_len(ti, length+2);
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_length, tvb, offset, 2, FALSE);
|
||||
offset= offset +2;
|
||||
|
||||
/* Link Layer Service Data Unit (i.e. a layer 3 message
|
||||
* as defined in 3GPP TS 24.008 or 3GPP TS 44.018)
|
||||
*/
|
||||
|
||||
proto_tree_add_text(ie_tree, tvb,offset,length,"Link Layer Service Data Unit ( L3 Message)");
|
||||
next_tvb = tvb_new_subset(tvb, offset, length, length);
|
||||
call_dissector(gsm_a_dtap_handle, next_tvb, pinfo, top_tree);
|
||||
|
||||
offset = offset + length;
|
||||
|
||||
return offset;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* 9.3.16 Physical Context TLV
|
||||
*/
|
||||
static int
|
||||
dissect_rsl_ie_phy_ctx(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *ie_tree;
|
||||
guint length;
|
||||
|
||||
ti = proto_tree_add_text(tree, tvb,offset,0,"Physical Context IE ");
|
||||
ie_tree = proto_item_add_subtree(ti, ett_ie_phy_ctx);
|
||||
|
||||
/* Element identifier */
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
/* Length */
|
||||
length = tvb_get_guint8(tvb,offset);
|
||||
proto_item_set_len(ti, length+2);
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_length, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
|
||||
/*
|
||||
* Physical Context Information:
|
||||
* The Physical Context Information field is not specified.
|
||||
* This information should not be analysed by BSC, but merely
|
||||
* forwarded from one TRX/channel to another.
|
||||
*/
|
||||
proto_tree_add_item(ie_tree, hf_rsl_phy_ctx, tvb, offset, length, FALSE);
|
||||
offset = offset + length;
|
||||
|
||||
return offset;
|
||||
}
|
||||
/*
|
||||
* 9.3.17 Access Delay M TV 2
|
||||
*/
|
||||
static int
|
||||
dissect_rsl_ie_access_delay(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *ie_tree;
|
||||
|
||||
ti = proto_tree_add_text(tree, tvb,offset,2,"Access Delay IE ");
|
||||
ie_tree = proto_item_add_subtree(ti, ett_ie_access_delay);
|
||||
|
||||
/* Element identifier */
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
proto_tree_add_item(ie_tree, hf_rsl_acc_delay, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
return offset;
|
||||
}
|
||||
/*
|
||||
* 9.3.19 Request Reference M TV 4
|
||||
*/
|
||||
static int
|
||||
dissect_rsl_ie_req_ref(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *ie_tree;
|
||||
|
||||
ti = proto_tree_add_text(tree, tvb,offset,4,"Request Reference IE ");
|
||||
ie_tree = proto_item_add_subtree(ti, ett_ie_req_ref);
|
||||
|
||||
/* Element identifier */
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
proto_tree_add_item(ie_tree, hf_rsl_req_ref_ra, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
proto_tree_add_item(ie_tree, hf_rsl_req_ref_T1prim, tvb, offset, 1, FALSE);
|
||||
proto_tree_add_item(ie_tree, hf_rsl_req_ref_T3, tvb, offset, 2, FALSE);
|
||||
offset++;
|
||||
proto_tree_add_item(ie_tree, hf_rsl_req_ref_T2, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
return offset;
|
||||
}
|
||||
|
||||
static const value_string rel_mode_vals[] = {
|
||||
{ 0x00, "Normal Release" },
|
||||
{ 0x01, "Local End Release" },
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
/*
|
||||
* 9.3.20 Release Mode 9.3.20 M TV 2
|
||||
*/
|
||||
dissect_rsl_ie_rel_mode(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *ie_tree;
|
||||
|
||||
ti = proto_tree_add_text(tree, tvb,offset,4,"Release Mode IE ");
|
||||
ie_tree = proto_item_add_subtree(ti, ett_ie_req_ref);
|
||||
|
||||
/* Element identifier */
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
|
||||
/* The M bit is coded as follows:
|
||||
* 0 normal release
|
||||
* 1 local end release
|
||||
*/
|
||||
proto_tree_add_item(ie_tree, hf_rsl_rel_mode, tvb, offset, 1, FALSE);
|
||||
|
||||
offset++;
|
||||
return offset;
|
||||
}
|
||||
|
||||
static const value_string rsl_cause_vals[] = {
|
||||
{ 0x00, "reserved" },
|
||||
{ 0x01, "timer T200 expired (N200+1) times" },
|
||||
{ 0x02, "re-establishment request" },
|
||||
{ 0x03, "unsolicited UA response" },
|
||||
{ 0x04, "unsolicited DM response" },
|
||||
{ 0x05, "unsolicated DM response, multiple frame established state" },
|
||||
{ 0x06, "unsolicited supervisory response" },
|
||||
{ 0x07, "sequence error" },
|
||||
{ 0x08, "U-frame with incorrect parameters" },
|
||||
{ 0x09, "S-frame with incorrect parameters" },
|
||||
{ 0x0a, "I-frame with incorrect use of M bit" },
|
||||
{ 0x0b, "I-frame with incorrect length" },
|
||||
{ 0x0c, "frame not implemented" },
|
||||
{ 0x0d, "SABM command, multiple frame established state" },
|
||||
{ 0x0e, "SABM frame with information not allowed in this state" },
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* 9.3.22 RLM Cause 9.3.22 M TLV 2-4
|
||||
*/
|
||||
dissect_rsl_ie_rlm_cause(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *ie_tree;
|
||||
|
||||
guint length;
|
||||
|
||||
ti = proto_tree_add_text(tree, tvb,offset,0,"RLM Cause IE ");
|
||||
ie_tree = proto_item_add_subtree(ti, ett_ie_full_imm_ass_inf);
|
||||
|
||||
/* Element identifier */
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
/* Length */
|
||||
length = tvb_get_guint8(tvb,offset);
|
||||
proto_item_set_len(ti, length+2);
|
||||
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_length, tvb, offset, 1, FALSE);
|
||||
|
||||
/* The Cause Value is a one octet field if the extension bit is set to 0.
|
||||
* If the extension bit is set to 1, the Cause Value is a two octet field.
|
||||
*/
|
||||
proto_tree_add_item(ie_tree, hf_rsl_cause, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
offset = offset + length;
|
||||
|
||||
return offset;
|
||||
}
|
||||
|
||||
/*
|
||||
* 9.3.35 Full Immediate Assign Info TLV 25
|
||||
*/
|
||||
static int
|
||||
dissect_rsl_ie_full_imm_ass_inf(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *ie_tree;
|
||||
|
||||
guint length;
|
||||
tvbuff_t *next_tvb;
|
||||
|
||||
ti = proto_tree_add_text(tree, tvb,offset,0,"Full Immediate Assign Info IE ");
|
||||
ie_tree = proto_item_add_subtree(ti, ett_ie_full_imm_ass_inf);
|
||||
|
||||
/* Element identifier */
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_id, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
/* Length */
|
||||
length = tvb_get_guint8(tvb,offset);
|
||||
proto_item_set_len(ti, length+2);
|
||||
|
||||
proto_tree_add_item(ie_tree, hf_rsl_ie_length, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
/* The Full Immediate Assign Info field (octets 3-25)
|
||||
* contains a complete immediate assign message (IMMEDIATE ASSIGNMENT or
|
||||
* IMMEDIATE ASSIGNMENT EXTENDED or IMMEDIATE ASSIGNMENT REJECT)
|
||||
* as defined in 3GPP TS 44.018.
|
||||
*/
|
||||
proto_tree_add_text(ie_tree, tvb,offset,length,"Full Immediate Assign Info field");
|
||||
next_tvb = tvb_new_subset(tvb, offset, length, length);
|
||||
call_dissector(gsm_a_ccch_handle, next_tvb, pinfo, top_tree);
|
||||
|
||||
offset = offset + length;
|
||||
|
||||
return offset;
|
||||
}
|
||||
static int
|
||||
dissct_rsl_msg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset)
|
||||
{
|
||||
guint8 msg_type;
|
||||
|
||||
msg_type = tvb_get_guint8(tvb,offset)&0x7f;
|
||||
proto_tree_add_item(tree, hf_rsl_msg_type, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
|
||||
if (check_col(pinfo->cinfo, COL_INFO)){
|
||||
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ",val_to_str(msg_type, rsl_msg_type_vals,"unknown %u"));
|
||||
}
|
||||
|
||||
|
||||
switch (msg_type){
|
||||
/* Radio Link Layer Management messages */
|
||||
/* 8.3.1 DATA REQUEST */
|
||||
case RSL_MSG_TYPE_DATA_REQ:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
/* L3 Information 9.3.11 M TLV >=3 */
|
||||
offset = dissect_rsl_ie_L3_inf(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.2 DATA INDICATION */
|
||||
case RSL_MSG_TYPE_DATA_IND:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
/* L3 Information 9.3.11 M TLV >=3 */
|
||||
offset = dissect_rsl_ie_L3_inf(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.3 ERROR INDICATION */
|
||||
case RSL_MSG_TYPE_ERROR_IND:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
/* RLM Cause 9.3.22 M TLV 2-4 */
|
||||
offset = dissect_rsl_ie_rlm_cause(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.4 ESTABLISH REQUEST */
|
||||
case RSL_MSG_TYPE_EST_REQ:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.5 ESTABLISH CONFIRM */
|
||||
case RSL_MSG_TYPE_EST_CONF:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.6 */
|
||||
case RSL_MSG_EST_IND:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
/* L3 Information 9.3.11 O (note 1) TLV 3-23 */
|
||||
if(tvb_length_remaining(tvb,offset) >1)
|
||||
offset = dissect_rsl_ie_L3_inf(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.7 RELEASE REQUEST */
|
||||
case RSL_MSG_REL_REQ:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
/* Release Mode 9.3.20 M TV 2 */
|
||||
offset = dissect_rsl_ie_rel_mode(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.8 RELEASE CONFIRM */
|
||||
case RSL_MSG_REL_CONF:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.9 RELEASE INDICATION */
|
||||
case RSL_MSG_REL_IND:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* 8.3.10 UNIT DATA REQUEST */
|
||||
case RSL_MSG_UNIT_DATA_REQ:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Link Identifier 9.3.2 M TV 2 */
|
||||
offset = dissect_rsl_ie_link_id(tvb, pinfo, tree, offset);
|
||||
/* L3 Information 9.3.11 O (note 1) TLV 3-23 */
|
||||
offset = dissect_rsl_ie_L3_inf(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
|
||||
/* Common Channel Management/TRX Management messages: */
|
||||
/* 8.5.3 */
|
||||
case RSL_MSG_CHANRQD:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Request Reference 9.3.19 M TV 4 */
|
||||
offset = dissect_rsl_ie_req_ref(tvb, pinfo, tree, offset);
|
||||
/* Access Delay 9.3.17 M TV 2 */
|
||||
offset = dissect_rsl_ie_access_delay(tvb, pinfo, tree, offset);
|
||||
/* Physical Context 9.3.16 O 1) TLV >=2 */
|
||||
if(tvb_length_remaining(tvb,offset) > 0)
|
||||
offset = dissect_rsl_ie_phy_ctx(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
case RSL_MSG_IMM_ASS_CMD:
|
||||
/* Channel number 9.3.1 M TV 2 */
|
||||
offset = dissect_rsl_ie_ch_no(tvb, pinfo, tree, offset);
|
||||
/* Full Imm. Assign Info 9.3.35 M TLV 25 */
|
||||
offset = dissect_rsl_ie_full_imm_ass_inf(tvb, pinfo, tree, offset);
|
||||
break;
|
||||
/* Dedicated Channel Management messages: */
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return offset;
|
||||
|
||||
}
|
||||
static void
|
||||
dissect_rsl(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
||||
{
|
||||
proto_item *ti;
|
||||
proto_tree *rsl_tree;
|
||||
|
||||
|
||||
int offset = 0;
|
||||
|
||||
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
||||
col_set_str(pinfo->cinfo, COL_PROTOCOL, "RSL");
|
||||
if (check_col(pinfo->cinfo, COL_INFO))
|
||||
col_clear(pinfo->cinfo, COL_INFO);
|
||||
|
||||
top_tree = tree;
|
||||
/*if (tree) {*/
|
||||
ti = proto_tree_add_item(tree, proto_rsl, tvb, 0, -1, FALSE);
|
||||
rsl_tree = proto_item_add_subtree(ti, ett_rsl);
|
||||
|
||||
/* 9.1 Message discriminator */
|
||||
proto_tree_add_item(rsl_tree, hf_rsl_msg_dsc, tvb, offset, 1, FALSE);
|
||||
proto_tree_add_item(rsl_tree, hf_rsl_T_bit, tvb, offset, 1, FALSE);
|
||||
offset++;
|
||||
offset = dissct_rsl_msg(tvb, pinfo, rsl_tree, offset );
|
||||
|
||||
/*}*/
|
||||
|
||||
}
|
||||
|
||||
void
|
||||
proto_reg_handoff_rsl(void)
|
||||
{
|
||||
dissector_handle_t rsl_handle;
|
||||
|
||||
rsl_handle = create_dissector_handle(dissect_rsl, proto_rsl);
|
||||
dissector_add("lapd.gsm.sapi", LAPD_GSM_SAPI_RA_SIG_PROC, rsl_handle);
|
||||
|
||||
gsm_a_ccch_handle = find_dissector("gsm_a_ccch");
|
||||
gsm_a_dtap_handle = find_dissector("gsm_a_dtap");
|
||||
}
|
||||
|
||||
/* Register the protocol with Wireshark */
|
||||
void proto_register_rsl(void)
|
||||
{
|
||||
|
||||
/* Setup list of header fields */
|
||||
static hf_register_info hf[] = {
|
||||
{ &hf_rsl_msg_dsc,
|
||||
{ "Message discriminator", "rsl.msg_dsc",
|
||||
FT_UINT8, BASE_DEC, VALS(rsl_msg_disc_vals), 0xfe,
|
||||
"Message discriminator", HFILL }
|
||||
},
|
||||
{ &hf_rsl_T_bit,
|
||||
{ "T bit", "rsl.T_bit",
|
||||
FT_BOOLEAN, 8, TFS(&rsl_t_bit_vals), 0x01,
|
||||
"T bit", HFILL }
|
||||
},
|
||||
{ &hf_rsl_msg_type,
|
||||
{ "Message type", "rsl.msg_type",
|
||||
FT_UINT8, BASE_HEX_DEC, VALS(rsl_msg_type_vals), 0x7f,
|
||||
"Message type", HFILL }
|
||||
},
|
||||
{ &hf_rsl_ie_id,
|
||||
{ "Element identifier", "rsl.ie_id",
|
||||
FT_UINT8, BASE_HEX_DEC, VALS(rsl_ie_type_vals), 0x0,
|
||||
"Element identifier", HFILL }
|
||||
},
|
||||
{ &hf_rsl_ie_length,
|
||||
{ "Length", "rsl.ie_length",
|
||||
FT_UINT16, BASE_DEC, NULL, 0x0,
|
||||
"Length", HFILL }
|
||||
},
|
||||
{ &hf_rsl_ch_no_Cbits,
|
||||
{ "C-bits", "rsl.ch_no_Cbits",
|
||||
FT_UINT8, BASE_DEC, VALS(rsl_ch_no_Cbits_vals), 0xf8,
|
||||
"C-bits", HFILL }
|
||||
},
|
||||
{ &hf_rsl_ch_no_TN,
|
||||
{ "Time slot number (TN)", "rsl.ch_no_TN",
|
||||
FT_UINT8, BASE_DEC, NULL, 0x03,
|
||||
"Time slot number (TN)", HFILL }
|
||||
},
|
||||
{ &hf_rsl_req_ref_ra,
|
||||
{ "Random Access Information (RA)", "rsl.req_ref_ra",
|
||||
FT_UINT8, BASE_DEC, NULL, 0x0,
|
||||
"Random Access Information (RA)", HFILL }
|
||||
},
|
||||
{ &hf_rsl_req_ref_T1prim,
|
||||
{ "T1'", "rsl.req_ref_T1prim",
|
||||
FT_UINT8, BASE_DEC, NULL, 0xf8,
|
||||
"T1'", HFILL }
|
||||
},
|
||||
{ &hf_rsl_req_ref_T3,
|
||||
{ "T3", "rsl.req_ref_T3",
|
||||
FT_UINT16, BASE_DEC, NULL, 0x07e0,
|
||||
"T3", HFILL }
|
||||
},
|
||||
{ &hf_rsl_req_ref_T2,
|
||||
{ "T2", "rsl.req_ref_T2",
|
||||
FT_UINT8, BASE_DEC, NULL, 0x1f,
|
||||
"T2", HFILL }
|
||||
},
|
||||
{ &hf_rsl_acc_delay,
|
||||
{ "Access Delay", "rsl.acc_del",
|
||||
FT_UINT8, BASE_DEC, NULL, 0x0,
|
||||
"Access Delay", HFILL }
|
||||
},
|
||||
{ &hf_rsl_phy_ctx,
|
||||
{ "Physical Context", "rsl.phy_ctx",
|
||||
FT_BYTES, BASE_NONE, NULL, 0x0,
|
||||
"Physical Context", HFILL }
|
||||
},
|
||||
{ &hf_rsl_na,
|
||||
{ "Not applicable (NA)", "rsl.na",
|
||||
FT_BOOLEAN, 8, TFS(&rsl_na_vals), 0x20,
|
||||
"Not applicable (NA)", HFILL }
|
||||
},
|
||||
{ &hf_rsl_ch_type,
|
||||
{ "channel type", "rsl.ch_type",
|
||||
FT_UINT8, BASE_DEC, VALS(rsl_ch_type_vals), 0xc0,
|
||||
"channel type", HFILL }
|
||||
},
|
||||
{ &hf_rsl_prio,
|
||||
{ "Priority", "rsl.prio",
|
||||
FT_UINT8, BASE_DEC, VALS(rsl_prio_vals), 0x18,
|
||||
"Priority", HFILL }
|
||||
},
|
||||
{ &hf_rsl_sapi,
|
||||
{ "SAPI", "rsl.sapi",
|
||||
FT_UINT8, BASE_DEC, NULL, 0x07,
|
||||
"SAPI", HFILL }
|
||||
},
|
||||
{ &hf_rsl_cause,
|
||||
{ "Cause", "rsl.cause",
|
||||
FT_UINT8, BASE_DEC, VALS(rsl_cause_vals), 0x7f,
|
||||
"Cause", HFILL }
|
||||
},
|
||||
{ &hf_rsl_rel_mode,
|
||||
{ "Release Mode", "rsl.rel_mode",
|
||||
FT_UINT8, BASE_DEC, VALS(rel_mode_vals), 0x01,
|
||||
"Relese Mode", HFILL }
|
||||
},
|
||||
|
||||
};
|
||||
static gint *ett[] = {
|
||||
&ett_rsl,
|
||||
&ett_ie_ch_no,
|
||||
&ett_ie_phy_ctx,
|
||||
&ett_ie_access_delay,
|
||||
&ett_ie_req_ref,
|
||||
&ett_ie_full_imm_ass_inf,
|
||||
};
|
||||
|
||||
/* Register the protocol name and description */
|
||||
proto_rsl = proto_register_protocol("Radio Signalling Link (RSL)",
|
||||
"RSL", "rsl");
|
||||
|
||||
proto_register_field_array(proto_rsl, hf, array_length(hf));
|
||||
proto_register_subtree_array(ett, array_length(ett));
|
||||
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue