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wireshark/epan/dissectors/packet-mac-lte.h

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/* packet-mac-lte.h
*
* Martin Mathieson
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This header file may also be distributed under
* the terms of the BSD Licence as follows:
*
* Copyright (C) 2009 Martin Mathieson. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "ws_symbol_export.h"
/* radioType */
#define FDD_RADIO 1
#define TDD_RADIO 2
/* Direction */
#define DIRECTION_UPLINK 0
#define DIRECTION_DOWNLINK 1
/* rntiType */
#define NO_RNTI 0
#define P_RNTI 1
#define RA_RNTI 2
#define C_RNTI 3
#define SI_RNTI 4
#define SPS_RNTI 5
#define M_RNTI 6
#define SL_BCH_RNTI 7
#define SL_RNTI 8
#define SC_RNTI 9
#define G_RNTI 10
typedef enum mac_lte_oob_event {
ltemac_send_preamble,
ltemac_send_sr,
ltemac_sr_failure
} mac_lte_oob_event;
typedef enum mac_lte_dl_retx {
dl_retx_no,
dl_retx_yes,
dl_retx_unknown
} mac_lte_dl_retx;
typedef enum mac_lte_crc_status {
crc_fail = 0,
crc_success = 1,
crc_high_code_rate = 2,
crc_pdsch_lost = 3,
crc_duplicate_nonzero_rv = 4,
crc_false_dci = 5
} mac_lte_crc_status;
/* N.B. for SCellIndex-r13 extends to 31 */
typedef enum mac_lte_carrier_id {
carrier_id_primary,
carrier_id_secondary_1,
carrier_id_secondary_2,
carrier_id_secondary_3,
carrier_id_secondary_4,
carrier_id_secondary_5,
carrier_id_secondary_6,
carrier_id_secondary_7
} mac_lte_carrier_id;
typedef enum mac_lte_ce_mode {
no_ce_mode = 0,
ce_mode_a = 1,
ce_mode_b = 2
} mac_lte_ce_mode;
typedef enum mac_lte_nb_mode {
no_nb_mode = 0,
nb_mode = 1
} mac_lte_nb_mode;
/* Context info attached to each LTE MAC frame */
typedef struct mac_lte_info
{
/* Needed for decode */
guint8 radioType;
guint8 direction;
guint8 rntiType;
/* Extra info to display */
guint16 rnti;
guint16 ueid;
/* Timing info */
guint16 sysframeNumber;
guint16 subframeNumber;
gboolean sfnSfInfoPresent;
/* Optional field. More interesting for TDD (FDD is always -4 subframeNumber) */
gboolean subframeNumberOfGrantPresent;
guint16 subframeNumberOfGrant;
/* Flag set only if doing PHY-level data test - i.e. there may not be a
well-formed MAC PDU so just show as raw data */
gboolean isPredefinedData;
/* Length of DL PDU or UL grant size in bytes */
guint16 length;
/* 0=newTx, 1=first-retx, etc */
guint8 reTxCount;
guint8 isPHICHNACK; /* FALSE=PDCCH retx grant, TRUE=PHICH NACK */
/* UL only. Indicates if the R10 extendedBSR-Sizes parameter is set */
gboolean isExtendedBSRSizes;
/* UL only. Indicates if the R10 simultaneousPUCCH-PUSCH parameter is set for PCell */
gboolean isSimultPUCCHPUSCHPCell;
/* UL only. Indicates if the R10 extendedBSR-Sizes parameter is set for PSCell */
gboolean isSimultPUCCHPUSCHPSCell;
/* Status of CRC check. For UE it is DL only. For eNodeB it is UL
only. For an analyzer, it is present for both DL and UL. */
gboolean crcStatusValid;
mac_lte_crc_status crcStatus;
/* Carrier ID */
mac_lte_carrier_id carrierId;
/* DL only. Is this known to be a retransmission? */
mac_lte_dl_retx dl_retx;
/* DL only. CE mode to be used for RAR decoding */
mac_lte_ce_mode ceMode;
/* DL and UL. NB-IoT mode of the UE */
mac_lte_nb_mode nbMode;
/* UL only, for now used for CE mode A RAR decoding */
guint8 nUlRb;
/* More Physical layer info (see direction above for which side of union to use) */
union {
struct mac_lte_ul_phy_info
{
guint8 present; /* Remaining UL fields are present and should be displayed */
guint8 modulation_type;
guint8 tbs_index;
guint8 resource_block_length;
guint8 resource_block_start;
guint8 harq_id;
gboolean ndi;
} ul_info;
struct mac_lte_dl_phy_info
{
guint8 present; /* Remaining DL fields are present and should be displayed */
guint8 dci_format;
guint8 resource_allocation_type;
guint8 aggregation_level;
guint8 mcs_index;
guint8 redundancy_version_index;
guint8 resource_block_length;
guint8 harq_id;
gboolean ndi;
guint8 transport_block; /* 0..1 */
} dl_info;
} detailed_phy_info;
/* Relating to out-of-band events */
/* N.B. dissector will only look to these fields if length is 0... */
mac_lte_oob_event oob_event;
guint8 rapid;
guint8 rach_attempt_number;
#define MAX_SRs 20
guint16 number_of_srs;
guint16 oob_ueid[MAX_SRs];
guint16 oob_rnti[MAX_SRs];
} mac_lte_info;
/* 0 to 10 and 32 to 38 */
#define MAC_LTE_DATA_LCID_COUNT_MAX 18
typedef struct mac_lte_tap_info {
/* Info from context */
guint16 rnti;
guint16 ueid;
guint8 rntiType;
guint8 isPredefinedData;
gboolean crcStatusValid;
mac_lte_crc_status crcStatus;
guint8 direction;
guint8 isPHYRetx;
guint16 ueInTTI;
nstime_t mac_lte_time;
/* Number of bytes (which part is used depends upon context settings) */
guint32 single_number_of_bytes;
guint32 bytes_for_lcid[MAC_LTE_DATA_LCID_COUNT_MAX];
guint32 sdus_for_lcid[MAC_LTE_DATA_LCID_COUNT_MAX];
guint8 number_of_rars;
guint8 number_of_paging_ids;
/* Number of padding bytes includes padding subheaders and trailing padding */
guint16 padding_bytes;
guint16 raw_length;
} mac_lte_tap_info;
/* Accessor function to check if a frame was considered to be ReTx */
int is_mac_lte_frame_retx(packet_info *pinfo, guint8 direction);
/**********************************************************************/
/* UDP framing format */
/* ----------------------- */
/* Several people have asked about dissecting MAC by framing */
/* PDUs over IP. A suggested format over UDP has been created */
/* and implemented by this dissector, using the definitions */
/* below. A link to an example program showing you how to encode */
/* these headers and send LTE MAC PDUs on a UDP socket is */
/* provided at https://gitlab.com/wireshark/wireshark/-/wikis/MAC-LTE */
/* */
/* A heuristic dissector (enabled by a preference) will */
/* recognise a signature at the beginning of these frames. */
/**********************************************************************/
/* Signature. Rather than try to define a port for this, or make the
port number a preference, frames will start with this string (with no
terminating NULL */
#define MAC_LTE_START_STRING "mac-lte"
/* Fixed fields. This is followed by the following 3 mandatory fields:
- radioType (1 byte)
- direction (1 byte)
- rntiType (1 byte)
(where the allowed values are defined above */
/* Optional fields. Attaching this info to frames will allow you
to show you display/filter/plot/add-custom-columns on these fields, so should
be added if available.
The format is to have the tag, followed by the value (there is no length field,
it's implicit from the tag) */
#define MAC_LTE_RNTI_TAG 0x02
/* 2 bytes, network order */
#define MAC_LTE_UEID_TAG 0x03
/* 2 bytes, network order */
#define MAC_LTE_FRAME_SUBFRAME_TAG 0x04
/* 2 bytes, network order, SFN is stored in 12 MSB and SF in 4 LSB */
#define MAC_LTE_PREDEFINED_DATA_TAG 0x05
/* 1 byte */
#define MAC_LTE_RETX_TAG 0x06
/* 1 byte */
#define MAC_LTE_CRC_STATUS_TAG 0x07
/* 1 byte */
#define MAC_LTE_EXT_BSR_SIZES_TAG 0x08
/* 0 byte */
#define MAC_LTE_SEND_PREAMBLE_TAG 0x09
/* 2 bytes, RAPID value (1 byte) followed by RACH attempt number (1 byte) */
#define MAC_LTE_CARRIER_ID_TAG 0x0A
/* 1 byte */
#define MAC_LTE_PHY_TAG 0x0B
/* variable length, length (1 byte) then depending on direction
in UL: modulation type (1 byte), TBS index (1 byte), RB length (1 byte),
RB start (1 byte), HARQ id (1 byte), NDI (1 byte)
in DL: DCI format (1 byte), resource allocation type (1 byte), aggregation level (1 byte),
MCS index (1 byte), redundancy version (1 byte), resource block length (1 byte),
HARQ id (1 byte), NDI (1 byte), TB (1 byte), DL reTx (1 byte) */
#define MAC_LTE_SIMULT_PUCCH_PUSCH_PCELL_TAG 0x0C
/* 0 byte */
#define MAC_LTE_SIMULT_PUCCH_PUSCH_PSCELL_TAG 0x0D
/* 0 byte */
#define MAC_LTE_CE_MODE_TAG 0x0E
/* 1 byte containing mac_lte_ce_mode enum value */
#define MAC_LTE_NB_MODE_TAG 0x0F
/* 1 byte containing mac_lte_nb_mode enum value */
#define MAC_LTE_N_UL_RB_TAG 0x10
/* 1 byte containing the number of UL resource blocks: 6, 15, 25, 50, 75 or 100 */
#define MAC_LTE_SR_TAG 0x11
/* 2 bytes for the number of items, followed by that number of ueid, rnti (2 bytes each) */
/* MAC PDU. Following this tag comes the actual MAC PDU (there is no length, the PDU
continues until the end of the frame) */
#define MAC_LTE_PAYLOAD_TAG 0x01
/* Type to store parameters for configuring LCID->RLC channel settings for DRB */
/* Some are optional, and may not be seen (e.g. on reestablishment) */
typedef struct drb_mapping_t
{
guint16 ueid; /* Mandatory */
guint8 drbid; /* Mandatory */
gboolean lcid_present;
guint8 lcid; /* Part of LogicalChannelConfig - optional */
gboolean rlcMode_present;
guint8 rlcMode; /* Part of RLC config - optional */
gboolean rlc_ul_ext_li_field; /* Part of RLC config - optional */
gboolean rlc_dl_ext_li_field; /* Part of RLC config - optional */
gboolean rlc_ul_ext_am_sn; /* Part of RLC config - optional */
gboolean rlc_dl_ext_am_sn; /* Part of RLC config - optional */
gboolean um_sn_length_present;
guint8 um_sn_length; /* Part of RLC config - optional */
gboolean ul_priority_present;
guint8 ul_priority; /* Part of LogicalChannelConfig - optional */
gboolean pdcp_sn_size_present;
guint8 pdcp_sn_size; /* Part of pdcp-Config - optional */
} drb_mapping_t;
/* Set details of an LCID -> drb channel mapping. To be called from
configuration protocol (e.g. RRC) */
void set_mac_lte_channel_mapping(drb_mapping_t *drb_mapping);
/* Dedicated DRX config. Used to verify that a sensible config is given.
Also, beginning to configure MAC with this config and (optionally) show
DRX config and state (cycles/timers) attached to each UL/DL PDU! */
typedef struct drx_config_t {
gboolean configured;
guint32 frameNum;
guint32 previousFrameNum;
guint32 onDurationTimer;
guint32 inactivityTimer;
guint32 retransmissionTimer;
guint32 longCycle;
guint32 cycleOffset;
/* Optional Short cycle */
gboolean shortCycleConfigured;
guint32 shortCycle;
guint32 shortCycleTimer;
} drx_config_t;
/* Functions to set/release up dedicated DRX config */
void set_mac_lte_drx_config(guint16 ueid, drx_config_t *drx_config, packet_info *pinfo);
void set_mac_lte_drx_config_release(guint16 ueid, packet_info *pinfo);
/* RRC can tell this dissector which RAPIDs are Group A, Group A&B */
void set_mac_lte_rapid_ranges(guint groupA, guint all_RA);
/* RRC can indicate whether extended BSR sizes are used */
void set_mac_lte_extended_bsr_sizes(guint16 ueid, gboolean use_ext_bsr_sizes, packet_info *pinfo);
/* RRC can indicate whether simultaneous PUCCH/PUSCH is used */
typedef enum {
SIMULT_PUCCH_PUSCH_PCELL = 0,
SIMULT_PUCCH_PUSCH_PSCELL
} simult_pucch_pusch_cell_type;
void set_mac_lte_simult_pucch_pusch(guint16 ueid, simult_pucch_pusch_cell_type cell_type, gboolean use_simult_pucch_pusch, packet_info *pinfo);
/* Functions to be called from outside this module (e.g. in a plugin, where mac_lte_info
isn't available) to get/set per-packet data */
WS_DLL_PUBLIC
mac_lte_info *get_mac_lte_proto_data(packet_info *pinfo);
WS_DLL_PUBLIC
void set_mac_lte_proto_data(packet_info *pinfo, mac_lte_info *p_mac_lte_info);
/* Function to attempt to populate p_mac_lte_info using framing definition above */
gboolean dissect_mac_lte_context_fields(struct mac_lte_info *p_mac_lte_info, tvbuff_t *tvb,
packet_info *pinfo, proto_tree *tree, gint *p_offset);
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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