forked from osmocom/wireshark
![Martin Mathieson](/assets/img/avatar_default.png)
the existing "mac-lte" UDP heuristic dissector. It is hoped that it will be possible to register a DLT for use with this format. svn path=/trunk/; revision=40580
270 lines
9.3 KiB
C
270 lines
9.3 KiB
C
/* packet-mac-lte.h
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*
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* Martin Mathieson
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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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* This header file may also be distributed under
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* the terms of the BSD Licence as follows:
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*
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* Copyright (C) 2009 Martin Mathieson. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE
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*/
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/* radioType */
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#define FDD_RADIO 1
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#define TDD_RADIO 2
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/* Direction */
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#define DIRECTION_UPLINK 0
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#define DIRECTION_DOWNLINK 1
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/* rntiType */
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#define NO_RNTI 0
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#define P_RNTI 1
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#define RA_RNTI 2
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#define C_RNTI 3
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#define SI_RNTI 4
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#define SPS_RNTI 5
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#define M_RNTI 6
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typedef enum mac_lte_oob_event {
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ltemac_send_preamble,
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ltemac_send_sr,
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ltemac_sr_failure
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} mac_lte_oob_event;
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typedef enum mac_lte_dl_retx {
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dl_retx_no,
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dl_retx_yes,
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dl_retx_unknown
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} mac_lte_dl_retx;
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typedef enum mac_lte_crc_status {
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crc_fail = 0,
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crc_success = 1,
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crc_high_code_rate = 2,
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crc_pdsch_lost = 3,
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crc_duplicate_nonzero_rv = 4
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} mac_lte_crc_status;
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/* Context info attached to each LTE MAC frame */
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typedef struct mac_lte_info
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{
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/* Needed for decode */
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guint8 radioType;
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guint8 direction;
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guint8 rntiType;
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/* Extra info to display */
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guint16 rnti;
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guint16 ueid;
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/* Timing info */
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guint16 sysframeNumber;
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guint16 subframeNumber;
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/* Optional field. More interesting for TDD (FDD is always -4 subframeNumber) */
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gboolean subframeNumberOfGrantPresent;
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guint16 subframeNumberOfGrant;
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/* Flag set only if doing PHY-level data test - i.e. there may not be a
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well-formed MAC PDU so just show as raw data */
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gboolean isPredefinedData;
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/* Length of DL PDU or UL grant size in bytes */
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guint16 length;
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/* UL only. 0=newTx, 1=first-retx, etc */
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guint8 reTxCount;
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guint8 isPHICHNACK; /* FALSE=PDCCH retx grant, TRUE=PHICH NACK */
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/* DL only. Status of CRC check */
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mac_lte_crc_status crcStatusValid;
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/* DL only. Is this known to be a retransmission? */
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mac_lte_dl_retx dl_retx;
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/* More Physical layer info (see direction above for which side of union to use) */
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union {
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struct mac_lte_ul_phy_info
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{
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guint8 present; /* Remaining UL fields are present and should be displayed */
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guint8 modulation_type;
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guint8 tbs_index;
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guint8 resource_block_length;
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guint8 resource_block_start;
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guint8 harq_id;
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gboolean ndi;
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} ul_info;
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struct mac_lte_dl_phy_info
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{
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guint8 present; /* Remaining UL fields are present and should be displayed */
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guint8 dci_format;
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guint8 resource_allocation_type;
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guint8 aggregation_level;
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guint8 mcs_index;
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guint8 redundancy_version_index;
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guint8 resource_block_length;
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mac_lte_crc_status crc_status;
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guint8 harq_id;
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gboolean ndi;
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guint8 transport_block; /* 1..2 */
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} dl_info;
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} detailed_phy_info;
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/* Relating to out-of-band events */
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/* N.B. dissector will only look to these fields if length is 0... */
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mac_lte_oob_event oob_event;
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guint8 rapid;
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guint8 rach_attempt_number;
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#define MAX_SRs 20
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guint16 number_of_srs;
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guint16 oob_ueid[MAX_SRs];
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guint16 oob_rnti[MAX_SRs];
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} mac_lte_info;
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typedef struct mac_lte_tap_info {
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/* Info from context */
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guint16 rnti;
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guint16 ueid;
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guint8 rntiType;
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guint8 isPredefinedData;
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guint8 crcStatusValid;
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mac_lte_crc_status crcStatus;
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guint8 direction;
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guint8 isPHYRetx;
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guint16 ueInTTI;
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nstime_t time;
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/* Number of bytes (which part is used depends upon context settings) */
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guint32 single_number_of_bytes;
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guint32 bytes_for_lcid[11];
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guint32 sdus_for_lcid[11];
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guint8 number_of_rars;
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/* Number of padding bytes includes padding subheaders and trailing padding */
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guint16 padding_bytes;
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guint16 raw_length;
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} mac_lte_tap_info;
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/* Accessor function to check if a frame was considered to be ReTx */
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int is_mac_lte_frame_retx(packet_info *pinfo, guint8 direction);
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/*****************************************************************/
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/* UDP framing format */
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/* ----------------------- */
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/* Several people have asked about dissecting MAC by framing */
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/* PDUs over IP. A suggested format over UDP has been created */
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/* and implemented by this dissector, using the definitions */
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/* below. A link to an example program showing you how to encode */
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/* these headers and send LTE MAC PDUs on a UDP socket is */
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/* provided at http://wiki.wireshark.org/MAC-LTE */
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/* */
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/* A heuristic dissecter (enabled by a preference) will */
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/* recognise a signature at the beginning of these frames . */
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/* Until someone is using this format, suggestions for changes */
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/* are welcome. */
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/*****************************************************************/
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/* Signature. Rather than try to define a port for this, or make the
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port number a preference, frames will start with this string (with no
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terminating NULL */
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#define MAC_LTE_START_STRING "mac-lte"
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/* Fixed fields. This is followed by the following 3 mandatory fields:
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- radioType (1 byte)
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- direction (1 byte)
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- rntiType (1 byte)
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(where the allowed values are defined above */
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/* Optional fields. Attaching this info to frames will allow you
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to show you display/filter/plot/add-custom-columns on these fields, so should
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be added if available.
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The format is to have the tag, followed by the value (there is no length field,
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its implicit from the tag) */
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#define MAC_LTE_RNTI_TAG 0x02
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/* 2 bytes, network order */
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#define MAC_LTE_UEID_TAG 0x03
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/* 2 bytes, network order */
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#define MAC_LTE_SUBFRAME_TAG 0x04
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/* 2 bytes, network order */
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#define MAC_LTE_PREDFINED_DATA_TAG 0x05
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/* 1 byte */
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#define MAC_LTE_RETX_TAG 0x06
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/* 1 byte */
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#define MAC_LTE_CRC_STATUS_TAG 0x07
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/* 1 byte */
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/* MAC PDU. Following this tag comes the actual MAC PDU (there is no length, the PDU
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continues until the end of the frame) */
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#define MAC_LTE_PAYLOAD_TAG 0x01
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/* Set details of an LCID -> drb channel mapping. To be called from
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configuration protocol (e.g. RRC) */
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void set_mac_lte_channel_mapping(guint16 ueid, guint8 lcid,
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guint8 srbid, guint8 drbid,
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guint8 rlcMode, guint8 um_sn_length,
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guint8 ul_priority);
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/* Functions to be called from outside this module (e.g. in a plugin, where mac_lte_info
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isn't available) to get/set per-packet data */
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mac_lte_info *get_mac_lte_proto_data(packet_info *pinfo);
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void set_mac_lte_proto_data(packet_info *pinfo, mac_lte_info *p_mac_lte_info);
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/* Function to attempt to populate p_mac_lte_info using framing definition above */
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gboolean dissect_mac_lte_context_fields(struct mac_lte_info *p_mac_lte_info, tvbuff_t *tvb,
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gint *p_offset);
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