![Guy Harris](/assets/img/avatar_default.png)
the svn:keywords and svn:eol-style properties appropriately. svn path=/trunk/; revision=25167
423 lines
13 KiB
C
423 lines
13 KiB
C
/* packet-gsm_bsslap.c
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* Routines for Location Services (LCS) Serving Mobile Location Centre - Base Station System (SMLC-BSS) dissection
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* Copyright 2008, Anders Broman <anders.broman[at]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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* 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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* References: 3GPP TS 48.071 version 7.2.0 Release 7
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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 <glib.h>
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#include <epan/packet.h>
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#include "packet-gsm_a.h"
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/* Initialize the protocol and registered fields */
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static int proto_gsm_bsslap = -1;
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static int hf_gsm_bsslap_msg_type = -1;
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static int hf_gsm_bsslap_ie = -1;
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static int hf_gsm_bsslap_cell_id = -1;
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static int hf_gsm_bsslap_ta = -1;
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static int hf_gsm_bsslap_length = -1;
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/* Initialize the subtree pointers */
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static int ett_gsm_bsslap = -1;
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static int ett_gsm_bsslap_ie = -1;
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static int ett_gsm_bsslap_ta = -1;
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static int ett_gsm_bsslap_meas_rep = -1;
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static int ett_gsm_bsslap_enh_meas_rep = -1;
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static int ett_gsm_bsslap_cell_id = -1;
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/* Table 5.1: Element Indentifier codes */
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static const value_string gsm_bsslap_ie_code_vals[] = {
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{ 0x00, "Reserved" },
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{ 0x01, "Timing Advance" },
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{ 0x08, "Reserved" }, /* (note) */
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{ 0x09, "Cell Identity" },
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{ 0x0a, "Reserved" }, /* (note) */
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{ 0x0b, "Reserved" }, /* (note) */
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{ 0x0c, "Reserved" }, /* (note) */
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{ 0x10, "Channel Description" },
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{ 0x11, "Reserved" }, /* (note) */
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{ 0x12, "Reserved" }, /* (note) */
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{ 0x13, "Reserved" }, /* (note) */
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{ 0x14, "Measurement Report" },
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{ 0x15, "Reserved" }, /* (note) */
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{ 0x18, "Cause" },
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{ 0x19, "RRLP Flag" },
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{ 0x1b, "RRLP IE" },
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{ 0x1c, "Cell Identity List" },
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{ 0x1d, "Enhanced Measurement Report" },
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{ 0x1e, "Location Area Code" },
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{ 0x21, "Frequency List" },
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{ 0x22, "MS Power" },
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{ 0x23, "Delta Timer" },
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{ 0x24, "Serving Cell Identifier" },
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{ 0x25, "Encryption Key (Kc)" },
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{ 0x26, "Cipher Mode Setting" },
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{ 0x27, "Channel Mode" },
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{ 0x28, "MultiRate Configuration" },
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{ 0x29, "Polling Repetition" },
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{ 0x2a, "Packet Channel Description" },
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{ 0x2b, "TLLI" },
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{ 0x2c, "TFI" },
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{ 0x2d, "Starting Time" },
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{ 0, NULL },
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};
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/*
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* NOTE: These values of the codepoints shall not be used as they were used in an earlier version of the
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* protocol.
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* All unassigned codes are spare.
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*/
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#define BSSLAP_TA_REQUEST 1
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#define BSSLAP_TA_RESPONSE 2
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#define BSSLAP_REJECT 10
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#define BSSLAP_RESET 11
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#define BSSLAP_ABORT 12
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#define BSSLAP_TA_LAYER3 13
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#define BSSLAP_MS_POS_CMD 15
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#define BSSLAP_MS_POS_RES 16
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#define BSSLAP_U_TDOA_REQ 17
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#define BSSLAP_U_TDOA_RES 18
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/* Table 5.1.1: Message Type codes */
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static const value_string gsm_bsslap_msg_type_vals[] = {
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{ 0x00, "Reserved" },
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{ BSSLAP_TA_REQUEST, "TA REQUEST" },
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{ BSSLAP_TA_RESPONSE, "TA RESPONSE" },
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{ 0x04, "Reserved" },
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{ 0x05, "Reserved" },
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{ BSSLAP_REJECT, "REJECT" },
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{ BSSLAP_RESET, "RESET" },
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{ BSSLAP_ABORT, "ABORT" },
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{ BSSLAP_TA_LAYER3, "TA LAYER3" },
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{ BSSLAP_MS_POS_CMD, "MS Position Command" },
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{ BSSLAP_MS_POS_RES, "MS Position Response" },
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{ BSSLAP_U_TDOA_REQ, "U-TDOA Request" },
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{ BSSLAP_U_TDOA_RES, "U-TDOA Response" },
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{ 0, NULL }
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};
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/* 4.2.1 TA Request ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_ta(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.2 TA Response ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_ta_res(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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proto_item *item = NULL;
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proto_tree *subtree = NULL;
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guint16 value;
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guint8 octet;
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guint8 length;
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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/* Cell Identity IE / 5.4 M TV 3 */
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item = proto_tree_add_text(tree,tvb, offset, 3,"Serving Cell Identity - ");
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subtree = proto_item_add_subtree(item, ett_gsm_bsslap_ie);
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proto_tree_add_item(subtree, hf_gsm_bsslap_ie, tvb, offset, 1, FALSE);
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offset++;
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value = tvb_get_ntohs(tvb, offset);
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proto_item_append_text(item ,"0x%x(%u)",value,value);
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proto_tree_add_item(subtree, hf_gsm_bsslap_cell_id, tvb, offset, 2, FALSE);
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offset = offset + 2;
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/* Timing Advance IE / 5.2 M TV 2 */
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item = proto_tree_add_text(tree,tvb, offset, 2,"Timing Advance - ");
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subtree = proto_item_add_subtree(item, ett_gsm_bsslap_ta);
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proto_tree_add_item(subtree, hf_gsm_bsslap_ie, tvb, offset, 1, FALSE);
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offset++;
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octet = tvb_get_guint8(tvb,offset);
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proto_tree_add_item(subtree, hf_gsm_bsslap_ta, tvb, offset, 1, FALSE);
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proto_item_append_text(item ,"%u",octet);
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offset++;
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if(tvb_reported_length_remaining(tvb,offset)==0){
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return offset;
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}
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/* Measurement Report IE / 5.12 O TLV 18 */
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item = proto_tree_add_text(tree,tvb, offset, 18,"Measurement Report");
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subtree = proto_item_add_subtree(item, ett_gsm_bsslap_meas_rep);
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proto_tree_add_item(subtree, hf_gsm_bsslap_ie, tvb, offset, 1, FALSE);
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offset++;
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length = tvb_get_guint8(tvb,offset);
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proto_tree_add_item(subtree, hf_gsm_bsslap_length, tvb, offset, 1, FALSE);
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offset++;
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/*TODO: Check this, may not give correct decoding */
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de_rr_meas_res(tvb, subtree, offset, length, NULL, 0);
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offset = offset + length;
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if(tvb_reported_length_remaining(tvb,offset)==0){
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return offset;
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}
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/* Enhanced Measurement Report IE / 5.18 O TLV 4-n */
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item = proto_tree_add_text(tree,tvb, offset, -1,"Enhanced Measurement Report");
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subtree = proto_item_add_subtree(item, ett_gsm_bsslap_enh_meas_rep);
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proto_tree_add_item(subtree, hf_gsm_bsslap_ie, tvb, offset, 1, FALSE);
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offset++;
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length = tvb_get_guint8(tvb,offset);
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proto_item_set_len(item, length+2);
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proto_tree_add_item(subtree, hf_gsm_bsslap_length, tvb, offset, 1, FALSE);
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offset++;
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proto_tree_add_text(tree,tvb, offset, length,"Data not decoded(yet)");
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offset = offset + length;
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if(tvb_reported_length_remaining(tvb,offset)==0){
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return offset;
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}
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/* Cell Identity List IE / 5.17 O TLV 6-n */
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item = proto_tree_add_text(tree,tvb, offset, -1,"Enhanced Measurement Report");
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subtree = proto_item_add_subtree(item, ett_gsm_bsslap_cell_id);
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proto_tree_add_item(subtree, hf_gsm_bsslap_ie, tvb, offset, 1, FALSE);
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offset++;
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length = tvb_get_guint8(tvb,offset);
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proto_item_set_len(item, length+2);
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proto_tree_add_item(subtree, hf_gsm_bsslap_length, tvb, offset, 1, FALSE);
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offset++;
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proto_tree_add_text(tree,tvb, offset, length,"Data not decoded(yet)");
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offset = offset + length;
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return offset;
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}
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/* 4.2.3 (void) ETSI TS 148 071 V7.2.0 (2007-06) */
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/* 4.2.4 (void) ETSI TS 148 071 V7.2.0 (2007-06) */
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/* 4.2.5 Reject ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_reject(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.6 Reset ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_reset(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.7 Abort ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_abort(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.8 TA Layer3 ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_ta_layer3(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.9 MS Position Command ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_ms_pos_cmd(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.10 MS Position Response ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_ms_pos_res(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.11 U-TDOA Request ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_u_tdoa_req(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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/* 4.2.12 U-TDOA Response ETSI TS 148 071 V7.2.0 (2007-06) */
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static int
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dissect_gsm_bsslap_u_tdoa_res(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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/* Message Type IE / 5.1 M V 1 */
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proto_tree_add_item(tree, hf_gsm_bsslap_msg_type, tvb, offset, 1, FALSE);
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offset++;
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return offset;
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}
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static void
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dissect_gsm_bsslap_apdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *item;
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proto_tree *sub_tree;
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int offset=0;
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guint8 octet;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_append_str(pinfo->cinfo, COL_PROTOCOL, "/BSSLAP");
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if (tree) {
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octet = tvb_get_guint8(tvb, offset);
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item = proto_tree_add_item(tree, proto_gsm_bsslap, tvb, 0, -1, FALSE);
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sub_tree = proto_item_add_subtree(item, ett_gsm_bsslap);
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switch (octet){
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case BSSLAP_TA_REQUEST:
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offset = dissect_gsm_bsslap_ta(tvb, sub_tree, offset);
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break;
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case BSSLAP_TA_RESPONSE:
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offset = dissect_gsm_bsslap_ta_res(tvb, sub_tree, offset);
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break;
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case BSSLAP_REJECT:
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offset = dissect_gsm_bsslap_reject(tvb, sub_tree, offset);
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break;
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case BSSLAP_RESET:
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offset = dissect_gsm_bsslap_reset(tvb, sub_tree, offset);
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break;
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case BSSLAP_ABORT:
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offset = dissect_gsm_bsslap_abort(tvb, sub_tree, offset);
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break;
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case BSSLAP_TA_LAYER3:
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offset = dissect_gsm_bsslap_ta_layer3(tvb, sub_tree, offset);
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break;
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case BSSLAP_MS_POS_CMD:
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offset = dissect_gsm_bsslap_ms_pos_cmd(tvb, sub_tree, offset);
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break;
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case BSSLAP_MS_POS_RES:
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offset = dissect_gsm_bsslap_ms_pos_res(tvb, sub_tree, offset);
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break;
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case BSSLAP_U_TDOA_REQ:
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offset = dissect_gsm_bsslap_u_tdoa_req(tvb, sub_tree, offset);
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break;
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case BSSLAP_U_TDOA_RES:
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offset = dissect_gsm_bsslap_u_tdoa_res(tvb, sub_tree, offset);
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break;
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default:
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break;
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}
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}
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}
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void
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proto_reg_handoff_gsm_bsslap(void)
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{
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dissector_handle_t gsm_bsslap_handle;
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gsm_bsslap_handle = create_dissector_handle(dissect_gsm_bsslap_apdu, proto_gsm_bsslap);
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}
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void
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proto_register_gsm_bsslap(void)
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{
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/* Setup list of header fields See Section 1.6.1 for details*/
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static hf_register_info hf[] = {
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{ &hf_gsm_bsslap_msg_type,
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{ "Message Type IE", "gsm_bsslap.msg_type",
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FT_UINT8, BASE_DEC, VALS(gsm_bsslap_msg_type_vals), 0x0,
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"Message Type IE", HFILL }
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},
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{ &hf_gsm_bsslap_ie,
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{ "Element identifier", "gsm_bsslap.ie",
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FT_UINT8, BASE_DEC, VALS(gsm_bsslap_ie_code_vals), 0x0,
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"Message Type IE", HFILL }
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},
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{ &hf_gsm_bsslap_cell_id,
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{ "Cell ID", "gsm_bsslap.cell_id",
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FT_UINT16, BASE_HEX_DEC, 0, 0x0,
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"", HFILL }
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},
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{ &hf_gsm_bsslap_ta,
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{ "Timing Advance", "gsm_bsslap.ta",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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"Timing Advance", HFILL }
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},
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{ &hf_gsm_bsslap_length,
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{ "Length", "gsm_bsslap.length",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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"Length", HFILL }
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_gsm_bsslap,
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&ett_gsm_bsslap_ie,
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&ett_gsm_bsslap_ta,
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&ett_gsm_bsslap_meas_rep,
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&ett_gsm_bsslap_enh_meas_rep,
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&ett_gsm_bsslap_cell_id,
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};
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/* Register the protocol name and description */
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proto_gsm_bsslap =
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proto_register_protocol("BSS LCS Assistance Protocol",
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"BSSLAP", "bsslap");
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/* Required function calls to register the header fields and subtrees used */
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proto_register_field_array(proto_gsm_bsslap, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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register_dissector("gsm_bsslap", dissect_gsm_bsslap_apdu, proto_gsm_bsslap);
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}
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