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

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/* Routines for LTE MAC disassembly
*
* Martin Mathieson
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <string.h>
#include <epan/packet.h>
#include <epan/exceptions.h>
#include <epan/expert.h>
#include <epan/prefs.h>
#include <epan/tap.h>
#include <epan/uat.h>
#include <epan/wmem/wmem.h>
#include "packet-mac-lte.h"
#include "packet-rlc-lte.h"
/* Described in:
* 3GPP TS 36.321 Evolved Universal Terrestrial Radio Access (E-UTRA)
* Medium Access Control (MAC) protocol specification v11.0.0
*/
/* Initialize the protocol and registered fields. */
int proto_mac_lte = -1;
static int mac_lte_tap = -1;
static dissector_handle_t rlc_lte_handle;
/* Decoding context */
static int hf_mac_lte_context = -1;
static int hf_mac_lte_context_radio_type = -1;
static int hf_mac_lte_context_direction = -1;
static int hf_mac_lte_context_rnti = -1;
static int hf_mac_lte_context_rnti_type = -1;
static int hf_mac_lte_context_ueid = -1;
static int hf_mac_lte_context_sysframe_number = -1;
static int hf_mac_lte_context_subframe_number = -1;
static int hf_mac_lte_context_grant_subframe_number = -1;
static int hf_mac_lte_context_predefined_frame = -1;
static int hf_mac_lte_context_length = -1;
static int hf_mac_lte_context_ul_grant_size = -1;
static int hf_mac_lte_context_bch_transport_channel = -1;
static int hf_mac_lte_context_retx_count = -1;
static int hf_mac_lte_context_retx_reason = -1;
static int hf_mac_lte_context_crc_status = -1;
static int hf_mac_lte_context_carrier_id = -1;
static int hf_mac_lte_context_rapid = -1;
static int hf_mac_lte_context_rach_attempt_number = -1;
/* Inferred context */
static int hf_mac_lte_ues_ul_per_tti = -1;
static int hf_mac_lte_ues_dl_per_tti = -1;
/* Extra PHY context */
static int hf_mac_lte_context_phy_ul = -1;
static int hf_mac_lte_context_phy_ul_modulation_type = -1;
static int hf_mac_lte_context_phy_ul_tbs_index = -1;
static int hf_mac_lte_context_phy_ul_resource_block_length = -1;
static int hf_mac_lte_context_phy_ul_resource_block_start = -1;
static int hf_mac_lte_context_phy_ul_harq_id = -1;
static int hf_mac_lte_context_phy_ul_ndi = -1;
static int hf_mac_lte_context_phy_dl = -1;
static int hf_mac_lte_context_phy_dl_dci_format = -1;
static int hf_mac_lte_context_phy_dl_resource_allocation_type = -1;
static int hf_mac_lte_context_phy_dl_aggregation_level = -1;
static int hf_mac_lte_context_phy_dl_mcs_index = -1;
static int hf_mac_lte_context_phy_dl_redundancy_version_index = -1;
static int hf_mac_lte_context_phy_dl_retx = -1;
static int hf_mac_lte_context_phy_dl_resource_block_length = -1;
static int hf_mac_lte_context_phy_dl_crc_status = -1;
static int hf_mac_lte_context_phy_dl_harq_id = -1;
static int hf_mac_lte_context_phy_dl_ndi = -1;
static int hf_mac_lte_context_phy_dl_tb = -1;
/* Out-of-band events */
static int hf_mac_lte_oob_send_preamble = -1;
static int hf_mac_lte_number_of_srs = -1;
/* MAC SCH/MCH header fields */
static int hf_mac_lte_ulsch = -1;
static int hf_mac_lte_ulsch_header = -1;
static int hf_mac_lte_dlsch = -1;
static int hf_mac_lte_dlsch_header = -1;
static int hf_mac_lte_sch_subheader = -1;
static int hf_mac_lte_mch = -1;
static int hf_mac_lte_mch_header = -1;
static int hf_mac_lte_mch_subheader = -1;
static int hf_mac_lte_sch_reserved = -1;
static int hf_mac_lte_dlsch_lcid = -1;
static int hf_mac_lte_ulsch_lcid = -1;
static int hf_mac_lte_sch_extended = -1;
static int hf_mac_lte_sch_format = -1;
static int hf_mac_lte_sch_length = -1;
static int hf_mac_lte_mch_reserved = -1;
static int hf_mac_lte_mch_lcid = -1;
static int hf_mac_lte_mch_extended = -1;
static int hf_mac_lte_mch_format = -1;
static int hf_mac_lte_mch_length = -1;
static int hf_mac_lte_sch_header_only = -1;
static int hf_mac_lte_mch_header_only = -1;
/* Data */
static int hf_mac_lte_sch_sdu = -1;
static int hf_mac_lte_mch_sdu = -1;
static int hf_mac_lte_bch_pdu = -1;
static int hf_mac_lte_pch_pdu = -1;
static int hf_mac_lte_predefined_pdu = -1;
static int hf_mac_lte_raw_pdu = -1;
static int hf_mac_lte_padding_data = -1;
static int hf_mac_lte_padding_length = -1;
/* RAR fields */
static int hf_mac_lte_rar = -1;
static int hf_mac_lte_rar_headers = -1;
static int hf_mac_lte_rar_header = -1;
static int hf_mac_lte_rar_extension = -1;
static int hf_mac_lte_rar_t = -1;
static int hf_mac_lte_rar_bi = -1;
static int hf_mac_lte_rar_rapid = -1;
static int hf_mac_lte_rar_no_of_rapids = -1;
static int hf_mac_lte_rar_reserved = -1;
static int hf_mac_lte_rar_body = -1;
static int hf_mac_lte_rar_reserved2 = -1;
static int hf_mac_lte_rar_ta = -1;
static int hf_mac_lte_rar_ul_grant = -1;
static int hf_mac_lte_rar_ul_grant_hopping = -1;
static int hf_mac_lte_rar_ul_grant_fsrba = -1;
static int hf_mac_lte_rar_ul_grant_tmcs = -1;
static int hf_mac_lte_rar_ul_grant_tcsp = -1;
static int hf_mac_lte_rar_ul_grant_ul_delay = -1;
static int hf_mac_lte_rar_ul_grant_cqi_request = -1;
static int hf_mac_lte_rar_temporary_crnti = -1;
/* Common channel control values */
static int hf_mac_lte_control_bsr = -1;
static int hf_mac_lte_control_bsr_lcg_id = -1;
static int hf_mac_lte_control_short_bsr_buffer_size = -1;
static int hf_mac_lte_control_long_bsr_buffer_size_0 = -1;
static int hf_mac_lte_control_long_bsr_buffer_size_1 = -1;
static int hf_mac_lte_control_long_bsr_buffer_size_2 = -1;
static int hf_mac_lte_control_long_bsr_buffer_size_3 = -1;
static int hf_mac_lte_control_short_ext_bsr_buffer_size = -1;
static int hf_mac_lte_control_long_ext_bsr_buffer_size_0 = -1;
static int hf_mac_lte_control_long_ext_bsr_buffer_size_1 = -1;
static int hf_mac_lte_control_long_ext_bsr_buffer_size_2 = -1;
static int hf_mac_lte_control_long_ext_bsr_buffer_size_3 = -1;
static int hf_mac_lte_control_crnti = -1;
static int hf_mac_lte_control_timing_advance = -1;
static int hf_mac_lte_control_timing_advance_group_id = -1;
static int hf_mac_lte_control_timing_advance_command = -1;
static int hf_mac_lte_control_ue_contention_resolution = -1;
static int hf_mac_lte_control_ue_contention_resolution_identity = -1;
static int hf_mac_lte_control_ue_contention_resolution_msg3 = -1;
static int hf_mac_lte_control_ue_contention_resolution_msg3_matched = -1;
static int hf_mac_lte_control_ue_contention_resolution_time_since_msg3 = -1;
static int hf_mac_lte_control_power_headroom = -1;
static int hf_mac_lte_control_power_headroom_reserved = -1;
static int hf_mac_lte_control_power_headroom_level = -1;
static int hf_mac_lte_control_ext_power_headroom = -1;
static int hf_mac_lte_control_ext_power_headroom_c7 = -1;
static int hf_mac_lte_control_ext_power_headroom_c6 = -1;
static int hf_mac_lte_control_ext_power_headroom_c5 = -1;
static int hf_mac_lte_control_ext_power_headroom_c4 = -1;
static int hf_mac_lte_control_ext_power_headroom_c3 = -1;
static int hf_mac_lte_control_ext_power_headroom_c2 = -1;
static int hf_mac_lte_control_ext_power_headroom_c1 = -1;
static int hf_mac_lte_control_ext_power_headroom_reserved = -1;
static int hf_mac_lte_control_ext_power_headroom_power_backoff = -1;
static int hf_mac_lte_control_ext_power_headroom_value = -1;
static int hf_mac_lte_control_ext_power_headroom_level = -1;
static int hf_mac_lte_control_ext_power_headroom_reserved2 = -1;
static int hf_mac_lte_control_ext_power_headroom_pcmaxc = -1;
static int hf_mac_lte_control_activation_deactivation = -1;
static int hf_mac_lte_control_activation_deactivation_c7 = -1;
static int hf_mac_lte_control_activation_deactivation_c6 = -1;
static int hf_mac_lte_control_activation_deactivation_c5 = -1;
static int hf_mac_lte_control_activation_deactivation_c4 = -1;
static int hf_mac_lte_control_activation_deactivation_c3 = -1;
static int hf_mac_lte_control_activation_deactivation_c2 = -1;
static int hf_mac_lte_control_activation_deactivation_c1 = -1;
static int hf_mac_lte_control_activation_deactivation_reserved = -1;
static int hf_mac_lte_control_mch_scheduling_info = -1;
static int hf_mac_lte_control_mch_scheduling_info_lcid = -1;
static int hf_mac_lte_control_mch_scheduling_info_stop_mtch = -1;
static int hf_mac_lte_dl_harq_resend_original_frame = -1;
static int hf_mac_lte_dl_harq_resend_time_since_previous_frame = -1;
static int hf_mac_lte_dl_harq_resend_next_frame = -1;
static int hf_mac_lte_dl_harq_resend_time_until_next_frame = -1;
static int hf_mac_lte_ul_harq_resend_original_frame = -1;
static int hf_mac_lte_ul_harq_resend_time_since_previous_frame = -1;
static int hf_mac_lte_ul_harq_resend_next_frame = -1;
static int hf_mac_lte_ul_harq_resend_time_until_next_frame = -1;
static int hf_mac_lte_grant_answering_sr = -1;
static int hf_mac_lte_failure_answering_sr = -1;
static int hf_mac_lte_sr_leading_to_failure = -1;
static int hf_mac_lte_sr_leading_to_grant = -1;
static int hf_mac_lte_sr_time_since_request = -1;
static int hf_mac_lte_sr_time_until_answer = -1;
static int hf_mac_lte_drx_config = -1;
static int hf_mac_lte_drx_config_frame_num = -1;
static int hf_mac_lte_drx_config_previous_frame_num = -1;
static int hf_mac_lte_drx_config_long_cycle = -1;
static int hf_mac_lte_drx_config_cycle_offset = -1;
static int hf_mac_lte_drx_config_onduration_timer = -1;
static int hf_mac_lte_drx_config_inactivity_timer = -1;
static int hf_mac_lte_drx_config_retransmission_timer = -1;
static int hf_mac_lte_drx_config_short_cycle = -1;
static int hf_mac_lte_drx_config_short_cycle_timer = -1;
static int hf_mac_lte_drx_state = -1;
static int hf_mac_lte_drx_state_long_cycle_offset = -1;
static int hf_mac_lte_drx_state_long_cycle_on = -1;
static int hf_mac_lte_drx_state_short_cycle_offset = -1;
static int hf_mac_lte_drx_state_short_cycle_on = -1;
static int hf_mac_lte_drx_state_inactivity_remaining = -1;
static int hf_mac_lte_drx_state_onduration_remaining = -1;
static int hf_mac_lte_drx_state_retransmission_remaining = -1;
static int hf_mac_lte_drx_state_rtt_remaining = -1;
static int hf_mac_lte_drx_state_short_cycle_remaining = -1;
/* Subtrees. */
static int ett_mac_lte = -1;
static int ett_mac_lte_context = -1;
static int ett_mac_lte_phy_context = -1;
static int ett_mac_lte_ulsch_header = -1;
static int ett_mac_lte_dlsch_header = -1;
static int ett_mac_lte_mch_header = -1;
static int ett_mac_lte_sch_subheader = -1;
static int ett_mac_lte_mch_subheader = -1;
static int ett_mac_lte_rar_headers = -1;
static int ett_mac_lte_rar_header = -1;
static int ett_mac_lte_rar_body = -1;
static int ett_mac_lte_rar_ul_grant = -1;
static int ett_mac_lte_bsr = -1;
static int ett_mac_lte_bch = -1;
static int ett_mac_lte_pch = -1;
static int ett_mac_lte_activation_deactivation = -1;
static int ett_mac_lte_contention_resolution = -1;
static int ett_mac_lte_timing_advance = -1;
static int ett_mac_lte_power_headroom = -1;
static int ett_mac_lte_extended_power_headroom = -1;
static int ett_mac_lte_extended_power_headroom_cell = -1;
static int ett_mac_lte_mch_scheduling_info = -1;
static int ett_mac_lte_oob = -1;
static int ett_mac_lte_drx_config = -1;
static int ett_mac_lte_drx_state = -1;
static expert_field ei_mac_lte_context_rnti_type = EI_INIT;
static expert_field ei_mac_lte_lcid_unexpected = EI_INIT;
static expert_field ei_mac_lte_ul_mac_frame_retx = EI_INIT;
static expert_field ei_mac_lte_oob_sr_failure = EI_INIT;
static expert_field ei_mac_lte_control_timing_advance_command_correction_needed = EI_INIT;
static expert_field ei_mac_lte_sch_header_only = EI_INIT;
static expert_field ei_mac_lte_control_timing_advance_command_no_correction = EI_INIT;
static expert_field ei_mac_lte_rar_timing_advance_not_zero_note = EI_INIT;
static expert_field ei_mac_lte_padding_data_start_and_end = EI_INIT;
static expert_field ei_mac_lte_bch_pdu = EI_INIT;
static expert_field ei_mac_lte_rach_preamble_sent_note = EI_INIT;
static expert_field ei_mac_lte_pch_pdu = EI_INIT;
static expert_field ei_mac_lte_ul_harq_resend_next_frame = EI_INIT;
static expert_field ei_mac_lte_control_bsr_multiple = EI_INIT;
static expert_field ei_mac_lte_padding_data_multiple = EI_INIT;
static expert_field ei_mac_lte_context_sysframe_number = EI_INIT;
static expert_field ei_mac_lte_rar_bi_present = EI_INIT;
static expert_field ei_mac_lte_control_element_size_invalid = EI_INIT;
static expert_field ei_mac_lte_bsr_warn_threshold_exceeded = EI_INIT;
static expert_field ei_mac_lte_too_many_subheaders = EI_INIT;
static expert_field ei_mac_lte_oob_send_sr = EI_INIT;
static expert_field ei_mac_lte_orig_tx_ul_frame_not_found = EI_INIT;
static expert_field ei_mac_lte_control_ue_contention_resolution_msg3_matched = EI_INIT;
static expert_field ei_mac_lte_sr_results_not_grant_or_failure_indication = EI_INIT;
static expert_field ei_mac_lte_context_crc_status = EI_INIT;
static expert_field ei_mac_lte_sr_invalid_event = EI_INIT;
static expert_field ei_mac_lte_control_subheader_after_data_subheader = EI_INIT;
static expert_field ei_mac_lte_rar_bi_not_first_subheader = EI_INIT;
static expert_field ei_mac_lte_context_length = EI_INIT;
static expert_field ei_mac_lte_reserved_not_zero = EI_INIT;
static expert_field ei_mac_lte_rar_timing_advance_not_zero_warn = EI_INIT;
static expert_field ei_mac_lte_dlsch_lcid = EI_INIT;
static expert_field ei_mac_lte_padding_data_before_control_subheader = EI_INIT;
static expert_field ei_mac_lte_rach_preamble_sent_warn = EI_INIT;
/* Constants and value strings */
static const value_string radio_type_vals[] =
{
{ FDD_RADIO, "FDD"},
{ TDD_RADIO, "TDD"},
{ 0, NULL }
};
static const value_string direction_vals[] =
{
{ DIRECTION_UPLINK, "Uplink"},
{ DIRECTION_DOWNLINK, "Downlink"},
{ 0, NULL }
};
static const value_string rnti_type_vals[] =
{
{ NO_RNTI, "NO-RNTI"},
{ P_RNTI, "P-RNTI"},
{ RA_RNTI, "RA-RNTI"},
{ C_RNTI, "C-RNTI"},
{ SI_RNTI, "SI-RNTI"},
{ SPS_RNTI, "SPS-RNTI"},
{ M_RNTI, "M-RNTI"},
{ 0, NULL }
};
static const value_string bch_transport_channel_vals[] =
{
{ SI_RNTI, "DL-SCH"},
{ NO_RNTI, "BCH"},
{ 0, NULL }
};
static const value_string crc_status_vals[] =
{
{ crc_success, "OK"},
{ crc_fail, "Failed"},
{ crc_high_code_rate, "High Code Rate"},
{ crc_pdsch_lost, "PDSCH Lost"},
{ crc_duplicate_nonzero_rv, "Duplicate_nonzero_rv"},
{ crc_false_dci, "False DCI"},
{ 0, NULL }
};
static const value_string carrier_id_vals[] =
{
{ carrier_id_primary, "Primary"},
{ carrier_id_secondary_1, "Secondary-1"},
{ carrier_id_secondary_2, "Secondary-2"},
{ carrier_id_secondary_3, "Secondary-3"},
{ carrier_id_secondary_4, "Secondary-4"},
{ 0, NULL }
};
static const value_string dci_format_vals[] =
{
{ 0, "0"},
{ 1, "1"},
{ 2, "1A"},
{ 3, "1B"},
{ 4, "1C"},
{ 5, "1D"},
{ 6, "2"},
{ 7, "2A"},
{ 8, "3/3A"},
{ 0, NULL }
};
static const value_string aggregation_level_vals[] =
{
{ 0, "1"},
{ 1, "2"},
{ 2, "4"},
{ 3, "8"},
{ 0, NULL }
};
static const value_string modulation_type_vals[] =
{
{ 2, "QPSK"},
{ 4, "QAM16"},
{ 6, "QAM64"},
{ 0, NULL }
};
static const true_false_string mac_lte_scell_ph_vals = {
"Reported",
"Not reported"
};
static const true_false_string mac_lte_power_backoff_vals = {
"Applied",
"Not applied"
};
static const true_false_string mac_lte_ph_value_vals = {
"Based on reference format",
"Based on real transmission"
};
static const true_false_string mac_lte_scell_status_vals = {
"Activated",
"Deactivated"
};
#define ACTIVATION_DEACTIVATION_LCID 0x1b
#define UE_CONTENTION_RESOLUTION_IDENTITY_LCID 0x1c
#define TIMING_ADVANCE_LCID 0x1d
#define DRX_COMMAND_LCID 0x1e
#define PADDING_LCID 0x1f
static const value_string dlsch_lcid_vals[] =
{
{ 0, "CCCH"},
{ 1, "1"},
{ 2, "2"},
{ 3, "3"},
{ 4, "4"},
{ 5, "5"},
{ 6, "6"},
{ 7, "7"},
{ 8, "8"},
{ 9, "9"},
{ 10, "10"},
{ ACTIVATION_DEACTIVATION_LCID , "Activation/Deactivation"},
{ UE_CONTENTION_RESOLUTION_IDENTITY_LCID, "UE Contention Resolution Identity"},
{ TIMING_ADVANCE_LCID , "Timing Advance"},
{ DRX_COMMAND_LCID , "DRX Command"},
{ PADDING_LCID , "Padding" },
{ 0, NULL }
};
#define EXTENDED_POWER_HEADROOM_REPORT_LCID 0x19
#define POWER_HEADROOM_REPORT_LCID 0x1a
#define CRNTI_LCID 0x1b
#define TRUNCATED_BSR_LCID 0x1c
#define SHORT_BSR_LCID 0x1d
#define LONG_BSR_LCID 0x1e
static const value_string ulsch_lcid_vals[] =
{
{ 0, "CCCH"},
{ 1, "1"},
{ 2, "2"},
{ 3, "3"},
{ 4, "4"},
{ 5, "5"},
{ 6, "6"},
{ 7, "7"},
{ 8, "8"},
{ 9, "9"},
{ 10, "10"},
{ EXTENDED_POWER_HEADROOM_REPORT_LCID, "Extended Power Headroom Report"},
{ POWER_HEADROOM_REPORT_LCID, "Power Headroom Report"},
{ CRNTI_LCID, "C-RNTI"},
{ TRUNCATED_BSR_LCID, "Truncated BSR"},
{ SHORT_BSR_LCID, "Short BSR"},
{ LONG_BSR_LCID, "Long BSR"},
{ PADDING_LCID, "Padding" },
{ 0, NULL }
};
#define MCH_SCHEDULING_INFO_LCID 0x1e
static const value_string mch_lcid_vals[] =
{
{ 0, "MCCH"},
{ 1, "1"},
{ 2, "2"},
{ 3, "3"},
{ 4, "4"},
{ 5, "5"},
{ 6, "6"},
{ 7, "7"},
{ 8, "8"},
{ 9, "9"},
{ 10, "10"},
{ 11, "11"},
{ 12, "12"},
{ 13, "13"},
{ 14, "14"},
{ 15, "15"},
{ 16, "16"},
{ 17, "17"},
{ 18, "18"},
{ 19, "19"},
{ 20, "20"},
{ 21, "21"},
{ 22, "22"},
{ 23, "23"},
{ 24, "24"},
{ 25, "25"},
{ 26, "26"},
{ 27, "27"},
{ 28, "28"},
{ MCH_SCHEDULING_INFO_LCID, "MCH Scheduling Information"},
{ PADDING_LCID, "Padding" },
{ 0, NULL }
};
static const value_string format_vals[] =
{
{ 0, "Data length is < 128 bytes"},
{ 1, "Data length is >= 128 bytes"},
{ 0, NULL }
};
static const value_string rar_type_vals[] =
{
{ 0, "Backoff Indicator present"},
{ 1, "RAPID present"},
{ 0, NULL }
};
static const value_string rar_bi_vals[] =
{
{ 0, "0"},
{ 1, "10"},
{ 2, "20"},
{ 3, "30"},
{ 4, "40"},
{ 5, "60"},
{ 6, "80"},
{ 7, "120"},
{ 8, "160"},
{ 9, "240"},
{ 10, "320"},
{ 11, "480"},
{ 12, "960"},
{ 0, NULL }
};
static const value_string buffer_size_vals[] =
{
{ 0, "BS = 0"},
{ 1, "0 < BS <= 10"},
{ 2, "10 < BS <= 12"},
{ 3, "12 < BS <= 14"},
{ 4, "14 < BS <= 17"},
{ 5, "17 < BS <= 19"},
{ 6, "19 < BS <= 22"},
{ 7, "22 < BS <= 26"},
{ 8, "26 < BS <= 31"},
{ 9, "31 < BS <= 36"},
{ 10, "36 < BS <= 42"},
{ 11, "42 < BS <= 49"},
{ 12, "49 < BS <= 57"},
{ 13, "47 < BS <= 67"},
{ 14, "67 < BS <= 78"},
{ 15, "78 < BS <= 91"},
{ 16, "91 < BS <= 107"},
{ 17, "107 < BS <= 125"},
{ 18, "125 < BS <= 146"},
{ 19, "146 < BS <= 171"},
{ 20, "171 < BS <= 200"},
{ 21, "200 < BS <= 234"},
{ 22, "234 < BS <= 274"},
{ 23, "274 < BS <= 321"},
{ 24, "321 < BS <= 376"},
{ 25, "376 < BS <= 440"},
{ 26, "440 < BS <= 515"},
{ 27, "515 < BS <= 603"},
{ 28, "603 < BS <= 706"},
{ 29, "706 < BS <= 826"},
{ 30, "826 < BS <= 967"},
{ 31, "967 < BS <= 1132"},
{ 32, "1132 < BS <= 1326"},
{ 33, "1326 < BS <= 1552"},
{ 34, "1552 < BS <= 1817"},
{ 35, "1817 < BS <= 2127"},
{ 36, "2127 < BS <= 2490"},
{ 37, "2490 < BS <= 2915"},
{ 38, "2915 < BS <= 3413"},
{ 39, "3413 < BS <= 3995"},
{ 40, "3995 < BS <= 4677"},
{ 41, "4677 < BS <= 5476"},
{ 42, "5476 < BS <= 6411"},
{ 43, "6411 < BS <= 7505"},
{ 44, "7505 < BS <= 8787"},
{ 45, "8787 < BS <= 10276"},
{ 46, "10287 < BS <= 12043"},
{ 47, "12043 < BS <= 14099"},
{ 48, "14099 < BS <= 16507"},
{ 49, "16507 < BS <= 19325"},
{ 50, "19325 < BS <= 22624"},
{ 51, "22624 < BS <= 26487"},
{ 52, "26487 < BS <= 31009"},
{ 53, "31009 < BS <= 36304"},
{ 54, "36304 < BS <= 42502"},
{ 55, "42502 < BS <= 49759"},
{ 56, "49759 < BS <= 58255"},
{ 57, "58255 < BS <= 68201"},
{ 58, "68201 < BS <= 79846"},
{ 59, "79846 < BS <= 93479"},
{ 60, "93479 < BS <= 109439"},
{ 61, "109439 < BS <= 128125"},
{ 62, "128125 < BS <= 150000"},
{ 63, "BS > 150000"},
{ 0, NULL }
};
static value_string_ext buffer_size_vals_ext = VALUE_STRING_EXT_INIT(buffer_size_vals);
static const value_string ext_buffer_size_vals[] =
{
{ 0, "BS = 0"},
{ 1, "0 < BS <= 10"},
{ 2, "10 < BS <= 13"},
{ 3, "13 < BS <= 16"},
{ 4, "16 < BS <= 19"},
{ 5, "19 < BS <= 23"},
{ 6, "23 < BS <= 29"},
{ 7, "29 < BS <= 35"},
{ 8, "35 < BS <= 43"},
{ 9, "43 < BS <= 53"},
{ 10, "53 < BS <= 65"},
{ 11, "65 < BS <= 80"},
{ 12, "80 < BS <= 98"},
{ 13, "98 < BS <= 120"},
{ 14, "120 < BS <= 147"},
{ 15, "147 < BS <= 181"},
{ 16, "181 < BS <= 223"},
{ 17, "223 < BS <= 274"},
{ 18, "274 < BS <= 337"},
{ 19, "337 < BS <= 414"},
{ 20, "414 < BS <= 509"},
{ 21, "509 < BS <= 625"},
{ 22, "625 < BS <= 769"},
{ 23, "769 < BS <= 945"},
{ 24, "945 < BS <= 1162"},
{ 25, "1162 < BS <= 1429"},
{ 26, "1429 < BS <= 1757"},
{ 27, "1757 < BS <= 2161"},
{ 28, "2161 < BS <= 2657"},
{ 29, "2657 < BS <= 3267"},
{ 30, "3267 < BS <= 4017"},
{ 31, "4017 < BS <= 4940"},
{ 32, "4940 < BS <= 6074"},
{ 33, "6074 < BS <= 7469"},
{ 34, "7469 < BS <= 9185"},
{ 35, "9185 < BS <= 11294"},
{ 36, "11294 < BS <= 13888"},
{ 37, "13888 < BS <= 17077"},
{ 38, "17077 < BS <= 20999"},
{ 39, "20999 < BS <= 25822"},
{ 40, "25822 < BS <= 31752"},
{ 41, "31752 < BS <= 39045"},
{ 42, "39045 < BS <= 48012"},
{ 43, "48012 < BS <= 59039"},
{ 44, "59039 < BS <= 72598"},
{ 45, "72598 < BS <= 89272"},
{ 46, "89272 < BS <= 109774"},
{ 47, "109774 < BS <= 134986"},
{ 48, "134986 < BS <= 165989"},
{ 49, "165989 < BS <= 204111"},
{ 50, "204111 < BS <= 250990"},
{ 51, "250990 < BS <= 308634"},
{ 52, "308634 < BS <= 379519"},
{ 53, "379519 < BS <= 466683"},
{ 54, "466683 < BS <= 573866"},
{ 55, "573866 < BS <= 705666"},
{ 56, "705666 < BS <= 867737"},
{ 57, "867737 < BS <= 1067031"},
{ 58, "1067031 < BS <= 1312097"},
{ 59, "1312097 < BS <= 1613447"},
{ 60, "1613447 < BS <= 1984009"},
{ 61, "1984009 < BS <= 2439678"},
{ 62, "2439678 < BS <= 3000000"},
{ 63, "BS > 3000000"},
{ 0, NULL }
};
static value_string_ext ext_buffer_size_vals_ext = VALUE_STRING_EXT_INIT(ext_buffer_size_vals);
static const value_string power_headroom_vals[] =
{
{ 0, "-23 <= PH < -22"},
{ 1, "-22 <= PH < -21"},
{ 2, "-21 <= PH < -20"},
{ 3, "-20 <= PH < -19"},
{ 4, "-19 <= PH < -18"},
{ 5, "-18 <= PH < -17"},
{ 6, "-17 <= PH < -16"},
{ 7, "-16 <= PH < -15"},
{ 8, "-15 <= PH < -14"},
{ 9, "-14 <= PH < -13"},
{ 10, "-13 <= PH < -12"},
{ 11, "-12 <= PH < -11"},
{ 12, "-11 <= PH < -10"},
{ 13, "-10 <= PH < -9"},
{ 14, "-9 <= PH < -8"},
{ 15, "-8 <= PH < -7"},
{ 16, "-7 <= PH < -6"},
{ 17, "-6 <= PH < -5"},
{ 18, "-5 <= PH < -4"},
{ 19, "-4 <= PH < -3"},
{ 20, "-3 <= PH < -2"},
{ 21, "-2 <= PH < -1"},
{ 22, "-1 <= PH < 0"},
{ 23, "0 <= PH < 1"},
{ 24, "1 <= PH < 2"},
{ 25, "2 <= PH < 3"},
{ 26, "3 <= PH < 4"},
{ 27, "4 <= PH < 5"},
{ 28, "5 <= PH < 6"},
{ 29, "6 <= PH < 7"},
{ 30, "7 <= PH < 8"},
{ 31, "8 <= PH < 9"},
{ 32, "9 <= PH < 10"},
{ 33, "10 <= PH < 11"},
{ 34, "11 <= PH < 12"},
{ 35, "12 <= PH < 13"},
{ 36, "13 <= PH < 14"},
{ 37, "14 <= PH < 15"},
{ 38, "15 <= PH < 16"},
{ 39, "16 <= PH < 17"},
{ 40, "17 <= PH < 18"},
{ 41, "18 <= PH < 19"},
{ 42, "19 <= PH < 20"},
{ 43, "20 <= PH < 21"},
{ 44, "21 <= PH < 22"},
{ 45, "22 <= PH < 23"},
{ 46, "23 <= PH < 24"},
{ 47, "24 <= PH < 25"},
{ 48, "25 <= PH < 26"},
{ 49, "26 <= PH < 27"},
{ 50, "27 <= PH < 28"},
{ 51, "28 <= PH < 29"},
{ 52, "29 <= PH < 30"},
{ 53, "30 <= PH < 31"},
{ 54, "31 <= PH < 32"},
{ 55, "32 <= PH < 33"},
{ 56, "33 <= PH < 34"},
{ 57, "34 <= PH < 35"},
{ 58, "34 <= PH < 36"},
{ 59, "36 <= PH < 37"},
{ 60, "37 <= PH < 38"},
{ 61, "38 <= PH < 39"},
{ 62, "39 <= PH < 40"},
{ 63, "PH >= 40"},
{ 0, NULL }
};
static value_string_ext power_headroom_vals_ext = VALUE_STRING_EXT_INIT(power_headroom_vals);
static const value_string pcmaxc_vals[] =
{
{ 0, "Pcmax,c < -29"},
{ 1, "-29 <= Pcmax,c < -28"},
{ 2, "-28 <= Pcmax,c < -27"},
{ 3, "-27 <= Pcmax,c < -26"},
{ 4, "-26 <= Pcmax,c < -25"},
{ 5, "-25 <= Pcmax,c < -24"},
{ 6, "-24 <= Pcmax,c < -23"},
{ 7, "-23 <= Pcmax,c < -22"},
{ 8, "-22 <= Pcmax,c < -21"},
{ 9, "-21 <= Pcmax,c < -20"},
{ 10, "-20 <= Pcmax,c < -19"},
{ 11, "-19 <= Pcmax,c < -18"},
{ 12, "-18 <= Pcmax,c < -17"},
{ 13, "-17 <= Pcmax,c < -16"},
{ 14, "-16 <= Pcmax,c < -15"},
{ 15, "-15 <= Pcmax,c < -14"},
{ 16, "-14 <= Pcmax,c < -13"},
{ 17, "-13 <= Pcmax,c < -12"},
{ 18, "-12 <= Pcmax,c < -11"},
{ 19, "-11 <= Pcmax,c < -10"},
{ 20, "-10 <= Pcmax,c < -9"},
{ 21, "-9 <= Pcmax,c < -8"},
{ 22, "-8 <= Pcmax,c < -7"},
{ 23, "-7 <= Pcmax,c < -6"},
{ 24, "-6 <= Pcmax,c < -5"},
{ 25, "-5 <= Pcmax,c < -4"},
{ 26, "-4 <= Pcmax,c < -3"},
{ 27, "-3 <= Pcmax,c < -2"},
{ 28, "-2 <= Pcmax,c < -1"},
{ 29, "-1 <= Pcmax,c < 0"},
{ 30, "0 <= Pcmax,c < 1"},
{ 31, "1 <= Pcmax,c < 2"},
{ 32, "2 <= Pcmax,c < 3"},
{ 33, "3 <= Pcmax,c < 4"},
{ 34, "4 <= Pcmax,c < 5"},
{ 35, "5 <= Pcmax,c < 6"},
{ 36, "6 <= Pcmax,c < 7"},
{ 37, "7 <= Pcmax,c < 8"},
{ 38, "8 <= Pcmax,c < 9"},
{ 39, "9 <= Pcmax,c < 10"},
{ 40, "10 <= Pcmax,c < 11"},
{ 41, "11 <= Pcmax,c < 12"},
{ 42, "12 <= Pcmax,c < 13"},
{ 43, "13 <= Pcmax,c < 14"},
{ 44, "14 <= Pcmax,c < 15"},
{ 45, "15 <= Pcmax,c < 16"},
{ 46, "16 <= Pcmax,c < 17"},
{ 47, "17 <= Pcmax,c < 18"},
{ 48, "18 <= Pcmax,c < 19"},
{ 49, "19 <= Pcmax,c < 20"},
{ 50, "20 <= Pcmax,c < 21"},
{ 51, "21 <= Pcmax,c < 22"},
{ 52, "22 <= Pcmax,c < 23"},
{ 53, "23 <= Pcmax,c < 24"},
{ 54, "24 <= Pcmax,c < 25"},
{ 55, "25 <= Pcmax,c < 26"},
{ 56, "26 <= Pcmax,c < 27"},
{ 57, "27 <= Pcmax,c < 28"},
{ 58, "28 <= Pcmax,c < 29"},
{ 59, "29 <= Pcmax,c < 30"},
{ 60, "30 <= Pcmax,c < 31"},
{ 61, "31 <= Pcmax,c < 32"},
{ 62, "32 <= Pcmax,c < 33"},
{ 63, "33 <= Pcmax,c"},
{ 0, NULL }
};
static value_string_ext pcmaxc_vals_ext = VALUE_STRING_EXT_INIT(pcmaxc_vals);
static const value_string header_only_vals[] =
{
{ 0, "MAC PDU Headers and body present"},
{ 1, "MAC PDU Headers only"},
{ 0, NULL }
};
static const value_string predefined_frame_vals[] =
{
{ 0, "Real MAC PDU present - will dissect"},
{ 1, "Predefined frame present - will not dissect"},
{ 0, NULL }
};
static const value_string ul_retx_grant_vals[] =
{
{ 0, "PDCCH ReTx"},
{ 1, "PHICH NACK"},
{ 0, NULL }
};
/**************************************************************************/
/* Preferences state */
/**************************************************************************/
/* If this PDU has been NACK'd (by HARQ) more than a certain number of times,
we trigger an expert warning. */
static gint global_mac_lte_retx_counter_trigger = 3;
/* By default try to decode transparent data (BCH, PCH and CCCH) data using LTE RRC dissector */
static gboolean global_mac_lte_attempt_rrc_decode = TRUE;
/* Whether should attempt to dissect frames failing CRC check */
static gboolean global_mac_lte_dissect_crc_failures = FALSE;
/* Whether should attempt to decode lcid 1&2 SDUs as srb1/2 (i.e. AM RLC) */
static gboolean global_mac_lte_attempt_srb_decode = TRUE;
/* Whether should attempt to decode MCH LCID 0 as MCCH */
static gboolean global_mac_lte_attempt_mcch_decode = FALSE;
/* Whether should call RLC dissector to decode MTCH LCIDs */
static gboolean global_mac_lte_call_rlc_for_mtch = FALSE;
/* Where to take LCID -> DRB mappings from */
enum lcid_drb_source {
FromStaticTable, FromConfigurationProtocol
};
static gint global_mac_lte_lcid_drb_source = (gint)FromStaticTable;
/* Threshold for warning in expert info about high BSR values */
static gint global_mac_lte_bsr_warn_threshold = 50; /* default is 19325 -> 22624 */
/* Whether or not to track SRs and related frames */
static gboolean global_mac_lte_track_sr = TRUE;
/* Which layer info to show in the info column */
enum layer_to_show {
ShowPHYLayer, ShowMACLayer, ShowRLCLayer
};
/* Which layer's details to show in Info column */
static gint global_mac_lte_layer_to_show = (gint)ShowRLCLayer;
/* Whether to decode Contention Resolution body as UL CCCH */
static gboolean global_mac_lte_decode_cr_body = FALSE;
/* Whether to record config and try to show DRX state for each configured UE */
static gboolean global_mac_lte_show_drx = FALSE;
/* When showing RLC info, count PDUs so can append info column properly */
static guint8 s_number_of_rlc_pdus_shown = 0;
/***********************************************************************/
/* How to dissect lcid 3-10 (presume drb logical channels) */
static const value_string drb_lcid_vals[] = {
{ 3, "LCID 3"},
{ 4, "LCID 4"},
{ 5, "LCID 5"},
{ 6, "LCID 6"},
{ 7, "LCID 7"},
{ 8, "LCID 8"},
{ 9, "LCID 9"},
{ 10, "LCID 10"},
{ 0, NULL }
};
typedef enum rlc_channel_type_t {
rlcRaw,
rlcTM,
rlcUM5,
rlcUM10,
rlcAM
} rlc_channel_type_t;
static const value_string rlc_channel_type_vals[] = {
{ rlcTM, "TM"},
{ rlcUM5 , "UM, SN Len=5"},
{ rlcUM10, "UM, SN Len=10"},
{ rlcAM , "AM"},
{ 0, NULL }
};
/* Mapping type */
typedef struct lcid_drb_mapping_t {
guint16 lcid;
gint drbid;
rlc_channel_type_t channel_type;
} lcid_drb_mapping_t;
/* Mapping entity */
static lcid_drb_mapping_t *lcid_drb_mappings = NULL;
static guint num_lcid_drb_mappings = 0;
UAT_VS_DEF(lcid_drb_mappings, lcid, lcid_drb_mapping_t, guint16, 3, "LCID 3")
UAT_DEC_CB_DEF(lcid_drb_mappings, drbid, lcid_drb_mapping_t)
UAT_VS_DEF(lcid_drb_mappings, channel_type, lcid_drb_mapping_t, rlc_channel_type_t, rlcAM, "AM")
/* UAT object */
static uat_t* lcid_drb_mappings_uat;
/* Dynamic mappings (set by configuration protocol)
LCID is the index into the array of these */
typedef struct dynamic_lcid_drb_mapping_t {
gboolean valid;
gint drbid;
rlc_channel_type_t channel_type;
guint8 ul_priority;
} dynamic_lcid_drb_mapping_t;
typedef struct ue_dynamic_drb_mappings_t {
dynamic_lcid_drb_mapping_t mapping[11]; /* Index is LCID */
guint8 drb_to_lcid_mappings[32]; /* Also map drbid -> lcid */
} ue_dynamic_drb_mappings_t;
static GHashTable *mac_lte_ue_channels_hash = NULL;
extern int proto_rlc_lte;
/***************************************************************/
/***************************************************************/
/* Keeping track of Msg3 bodies so they can be compared with */
/* Contention Resolution bodies. */
typedef struct Msg3Data {
guint8 data[6];
nstime_t msg3Time;
guint32 framenum;
} Msg3Data;
/* This table stores (RNTI -> Msg3Data*). Will be populated when
Msg3 frames are first read. */
static GHashTable *mac_lte_msg3_hash = NULL;
/* Hash table functions for mac_lte_msg3_hash. Hash is just the (RNTI) key */
static gint mac_lte_rnti_hash_equal(gconstpointer v, gconstpointer v2)
{
return (v == v2);
}
static guint mac_lte_rnti_hash_func(gconstpointer v)
{
return GPOINTER_TO_UINT(v);
}
typedef enum ContentionResolutionStatus {
NoMsg3,
Msg3Match,
Msg3NoMatch
} ContentionResolutionStatus;
typedef struct ContentionResolutionResult {
ContentionResolutionStatus status;
guint msg3FrameNum;
guint msSinceMsg3;
} ContentionResolutionResult;
/* This table stores (CRFrameNum -> CRResult). It is assigned during the first
pass and used thereafter */
static GHashTable *mac_lte_cr_result_hash = NULL;
/* Hash table functions for mac_lte_cr_result_hash. Hash is just the (framenum) key */
static gint mac_lte_framenum_hash_equal(gconstpointer v, gconstpointer v2)
{
return (v == v2);
}
static guint mac_lte_framenum_hash_func(gconstpointer v)
{
return GPOINTER_TO_UINT(v);
}
/**************************************************************************/
/****************************************************************/
/* Keeping track of last DL frames per C-RNTI so can guess when */
/* there has been a HARQ retransmission */
/* TODO: this should be simplified now that harq-id & ndi are */
/* being logged! */
/* Could be bigger, but more than enough to flag suspected resends */
#define MAX_EXPECTED_PDU_LENGTH 2048
typedef struct LastFrameData {
gboolean inUse;
guint32 framenum;
gboolean ndi;
nstime_t received_time;
gint length;
guint8 data[MAX_EXPECTED_PDU_LENGTH];
} LastFrameData;
typedef struct DLHarqBuffers {
LastFrameData harqid[2][15]; /* 2 blocks (1 for each antenna) needed for DL */
} DLHarqBuffers;
/* This table stores (RNTI -> DLHARQBuffers*). Will be populated when
DL frames are first read. */
static GHashTable *mac_lte_dl_harq_hash = NULL;
typedef struct DLHARQResult {
gboolean previousSet, nextSet;
guint previousFrameNum;
guint timeSincePreviousFrame;
guint nextFrameNum;
guint timeToNextFrame;
} DLHARQResult;
/* This table stores (FrameNumber -> *DLHARQResult). It is assigned during the first
pass and used thereafter */
static GHashTable *mac_lte_dl_harq_result_hash = NULL;
/**************************************************************************/
/*****************************************************************/
/* Keeping track of last UL frames per C-RNTI so can verify when */
/* told that a frame is a retx */
typedef struct ULHarqBuffers {
LastFrameData harqid[8];
} ULHarqBuffers;
/* This table stores (RNTI -> ULHarqBuffers*). Will be populated when
UL frames are first read. */
static GHashTable *mac_lte_ul_harq_hash = NULL;
typedef struct ULHARQResult {
gboolean previousSet, nextSet;
guint previousFrameNum;
guint timeSincePreviousFrame;
guint nextFrameNum;
guint timeToNextFrame;
} ULHARQResult;
/* This table stores (FrameNum -> ULHARQResult). It is assigned during the first
pass and used thereafter */
static GHashTable *mac_lte_ul_harq_result_hash = NULL;
/**************************************************************************/
/**************************************************************************/
/* Tracking of Scheduling Requests (SRs). */
/* Keep track of: */
/* - last grant before SR */
/* - SR failures following request */
/* - grant following SR */
typedef enum SREvent {
SR_Grant,
SR_Request,
SR_Failure
} SREvent;
static const value_string sr_event_vals[] =
{
{ SR_Grant, "Grant"},
{ SR_Request, "SR Request"},
{ SR_Failure, "SR Failure"},
{ 0, NULL}
};
typedef enum SRStatus {
None,
SR_Outstanding,
SR_Failed
} SRStatus;
static const value_string sr_status_vals[] =
{
{ None, "Receiving grants"},
{ SR_Outstanding, "SR Request outstanding"},
{ SR_Failed, "SR has Failed"},
{ 0, NULL}
};
typedef struct SRState {
SRStatus status;
guint32 lastSRFramenum;
guint32 lastGrantFramenum;
nstime_t requestTime;
} SRState;
/* This table keeps track of the SR state for each UE.
(RNTI -> SRState) */
static GHashTable *mac_lte_ue_sr_state = NULL;
typedef enum SRResultType {
GrantAnsweringSR,
FailureAnsweringSR,
SRLeadingToGrant,
SRLeadingToFailure,
InvalidSREvent
} SRResultType;
typedef struct SRResult {
SRResultType type;
guint32 frameNum;
guint32 timeDifference;
/* These 2 are only used with InvalidSREvent */
SRStatus status;
SREvent event;
} SRResult;
/* Entries in this table are created during the first pass
It maps (SRFrameNum -> SRResult) */
static GHashTable *mac_lte_sr_request_hash = NULL;
/**************************************************************************/
/**************************************************************************/
/* DRX State */
/* Config for current cycle/timer state for a configured UE */
/* Entries in this table are maintained during the first pass
It maps (UEId -> drx_state_t). */
static GHashTable *mac_lte_drx_ue_state = NULL;
typedef struct drx_running_state_t
{
/* Need time reference point to work out timers, as SFN may wrap */
gboolean firstCycleStartSet;
nstime_t firstCycleStart;
/* Cycle information */
gboolean inShortCycle;
/* Timers */
nstime_t currentTime; /* absolute time of last PDU */
guint16 currentSFN;
guint16 currentSF;
gboolean inOnDuration;
guint64 onDurationTimer;
guint64 inactivityTimer;
guint64 RTT[8];
guint64 retransmissionTimer[8];
guint64 shortCycleTimer;
} drx_running_state_t;
/* Have 2 states for each PDU. One for before the PDU/event, and one after.
Only then can show if we don't think it should have been active at that point... */
typedef struct drx_state_t {
drx_config_t config;
drx_running_state_t state_before;
drx_running_state_t state_after;
} drx_state_t;
/* Entries in this table are written during the first pass
It maps (Framenum -> drx_state_t), so state at that point may be shown */
static GHashTable *mac_lte_drx_frame_result = NULL;
/* Initialise the UE DRX state */
static void init_drx_ue_state(drx_state_t *drx_state, gboolean at_init)
{
int i;
drx_state->state_before.inShortCycle = FALSE;
if (at_init) {
drx_state->state_before.onDurationTimer = G_GUINT64_CONSTANT(0);
}
drx_state->state_before.inactivityTimer = G_GUINT64_CONSTANT(0);
for (i=0; i < 8; i++) {
drx_state->state_before.RTT[i] = G_GUINT64_CONSTANT(0);
drx_state->state_before.retransmissionTimer[i] = G_GUINT64_CONSTANT(0);
}
drx_state->state_before.shortCycleTimer = G_GUINT64_CONSTANT(0);
}
typedef enum drx_timer_type_t {
drx_onduration_timer,
drx_inactivity_timer,
drx_rtt_timer,
drx_retx_timer,
drx_short_cycle_timer
} drx_timer_type_t;
/* Start the specified timer. Use the time period in the config */
static void mac_lte_drx_start_timer(drx_state_t *p_state, drx_timer_type_t timer_type, guint8 timer_id)
{
/* Get current time in ms */
/* TODO: should this be relative to firstCycleStart to avoid overflowing? */
guint64 currentTime = (p_state->state_before.currentTime.secs * 1000) + (p_state->state_before.currentTime.nsecs / 1000000);
guint64 *pTimer;
guint16 timerLength;
/* Get pointer to timer value, and fetch from config how much to add to it */
switch (timer_type) {
case drx_onduration_timer:
pTimer = &(p_state->state_before.onDurationTimer);
timerLength = p_state->config.onDurationTimer;
break;
case drx_inactivity_timer:
pTimer = &(p_state->state_before.inactivityTimer);
timerLength = p_state->config.inactivityTimer;
break;
case drx_rtt_timer:
pTimer = &(p_state->state_before.RTT[timer_id]);
timerLength = 8;
break;
case drx_retx_timer:
pTimer = &(p_state->state_before.retransmissionTimer[timer_id]);
timerLength = p_state->config.retransmissionTimer;
break;
case drx_short_cycle_timer:
default:
pTimer = &(p_state->state_before.shortCycleTimer);
timerLength = p_state->config.shortCycle * p_state->config.shortCycleTimer;
break;
}
/* Set timer */
*pTimer = currentTime + timerLength;
}
/* Stop the specified timer. */
static void mac_lte_drx_stop_timer(drx_state_t *p_state, drx_timer_type_t timer_type, guint8 timer_id)
{
/* Set indicated timer value to 0 */
switch (timer_type) {
case drx_onduration_timer:
p_state->state_before.onDurationTimer = G_GUINT64_CONSTANT(0);
break;
case drx_inactivity_timer:
p_state->state_before.inactivityTimer = G_GUINT64_CONSTANT(0);
break;
case drx_rtt_timer:
p_state->state_before.RTT[timer_id] = G_GUINT64_CONSTANT(0);
break;
case drx_retx_timer:
p_state->state_before.retransmissionTimer[timer_id] = G_GUINT64_CONSTANT(0);
break;
case drx_short_cycle_timer:
p_state->state_before.shortCycleTimer = G_GUINT64_CONSTANT(0);
break;
}
}
/* Has the specified timer expired? */
static gboolean mac_lte_drx_has_timer_expired(drx_state_t *p_state, drx_timer_type_t timer_type, guint8 timer_id,
gboolean before_event,
guint64 *time_until_expires)
{
guint64 *pTimer = NULL;
drx_running_state_t *state_to_use;
guint64 currentTime;
if (before_event) {
state_to_use = &p_state->state_before;
}
else {
state_to_use = &p_state->state_after;
}
/* Get current time in ms */
/* TODO: should this be relative to firstCycleStart to avoid overflowing? */
currentTime = (state_to_use->currentTime.secs * 1000) + (state_to_use->currentTime.nsecs / 1000000);
/* Get pointer to timer value */
switch (timer_type) {
case drx_onduration_timer:
pTimer = &(state_to_use->onDurationTimer);
break;
case drx_inactivity_timer:
pTimer = &(state_to_use->inactivityTimer);
break;
case drx_rtt_timer:
pTimer = &(state_to_use->RTT[timer_id]);
break;
case drx_retx_timer:
pTimer = &(state_to_use->retransmissionTimer[timer_id]);
break;
case drx_short_cycle_timer:
pTimer = &(state_to_use->shortCycleTimer);
break;
default:
return FALSE;
}
/* TODO: verify using SFN/SF ? */
if (currentTime >= *pTimer) {
return TRUE;
}
else {
*time_until_expires = *pTimer - currentTime;
return FALSE;
}
}
/* Handling of triggers that can prompt changes in state */
static void mac_lte_drx_new_ulsch_data(guint16 ueid)
{
/* Look up state of this UE */
drx_state_t *ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state, GUINT_TO_POINTER((guint)ueid));
/* Start inactivity timer */
if (ue_state != NULL) {
mac_lte_drx_start_timer(ue_state, drx_inactivity_timer, 0);
}
}
static void mac_lte_drx_new_dlsch_data(guint16 ueid)
{
/* Look up state of this UE */
drx_state_t *ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state,
GUINT_TO_POINTER((guint)ueid));
/* Start retransmission timer */
if (ue_state != NULL) {
mac_lte_drx_start_timer(ue_state, drx_inactivity_timer, 0);
}
}
static void mac_lte_drx_dl_crc_error(guint16 ueid)
{
/* Look up state of this UE */
drx_state_t *ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state,
GUINT_TO_POINTER((guint)ueid));
/* Start timer */
if (ue_state != NULL) {
mac_lte_drx_start_timer(ue_state, drx_retx_timer, 0);
}
}
/* A DRX control element has been received */
static void mac_lte_drx_control_element_received(guint16 ueid)
{
/* Look up state of this UE */
drx_state_t *ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state,
GUINT_TO_POINTER((guint)ueid));
/* Start timers */
if (ue_state != NULL) {
mac_lte_drx_stop_timer(ue_state, drx_onduration_timer, 0);
mac_lte_drx_stop_timer(ue_state, drx_inactivity_timer, 0);
}
}
/* Update the DRX state of the UE based on previous info and current time.
This is called every time a UE with DRX configured has an UL or DL PDU */
static void update_drx_info(packet_info *pinfo, mac_lte_info *p_mac_lte_info)
{
int harq_id;
guint64 time_until_expires;
/* Look up state of this UE */
drx_state_t *ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state,
GUINT_TO_POINTER((guint)p_mac_lte_info->ueid));
if (ue_state != NULL) {
guint16 SFN = p_mac_lte_info->sysframeNumber;
guint16 SF = p_mac_lte_info->subframeNumber;
/* Make sure the first time reference has been set */
if (!ue_state->state_before.firstCycleStartSet) {
guint16 subframes = SFN*10 + SF;
/* Set firstCycleStart to be the previous SFN=0, SF=0 */
if (pinfo->fd->abs_ts.nsecs > ((subframes % 1000)*1000)) {
ue_state->state_before.firstCycleStart.secs = pinfo->fd->abs_ts.secs - (subframes/1000);
ue_state->state_before.firstCycleStart.nsecs = pinfo->fd->abs_ts.nsecs - (subframes*1000);
}
else {
ue_state->state_before.firstCycleStart.secs = pinfo->fd->abs_ts.secs - (subframes/1000) - 1;
ue_state->state_before.firstCycleStart.nsecs = 1000000 + pinfo->fd->abs_ts.nsecs - (subframes*1000);
}
ue_state->state_before.firstCycleStartSet = TRUE;
/* Set current time to now */
ue_state->state_before.currentSFN = SFN;
ue_state->state_before.currentSF = SF;
}
/* Will loop around these checks, once for each subframe between previous
currentTime for this UE, and the time now!!! */
/* It *should* be possible to just deal with the elapsed time all at once,
but much harder to get right, so loop. */
/* If > ~10s since last PDU, just zero all timers (except onDuration) */
if ((pinfo->fd->abs_ts.secs - ue_state->state_before.currentTime.secs) >= 9) {
init_drx_ue_state(ue_state, FALSE);
}
while ((ue_state->state_before.currentSFN != SFN) || (ue_state->state_before.currentSF != SF)) {
/* Check for timers that have expired and change state accordingly */
/* See if onDuration timer should be started */
guint16 subframes = SFN*10 + SF;
if (!ue_state->state_before.inShortCycle) {
if ((subframes % ue_state->config.longCycle) == ue_state->config.onDurationTimer) {
mac_lte_drx_start_timer(ue_state, drx_onduration_timer, 0);
ue_state->state_before.inOnDuration = TRUE;
}
}
else {
if ((subframes % ue_state->config.shortCycle) == (ue_state->config.onDurationTimer % ue_state->config.shortCycle)) {
mac_lte_drx_start_timer(ue_state, drx_onduration_timer, 0);
ue_state->state_before.inOnDuration = TRUE;
}
}
/* See if onDuration has expired */
if (mac_lte_drx_has_timer_expired(ue_state, drx_onduration_timer, 0, TRUE, &time_until_expires)) {
ue_state->state_before.inOnDuration = FALSE;
}
/* Check for HARQ RTT Timer expiring.
In practice only one could expire in any given subframe... */
for (harq_id = 0 ; harq_id < 8; harq_id++) {
if (mac_lte_drx_has_timer_expired(ue_state, drx_rtt_timer, harq_id, TRUE, &time_until_expires)) {
/* Start the Retransmission timer */
mac_lte_drx_start_timer(ue_state, drx_retx_timer, harq_id);
}
}
/* Reception of DRX command is dealt with separately at the moment... */
/* Inactivity timer expired */
if (mac_lte_drx_has_timer_expired(ue_state, drx_inactivity_timer, 0, TRUE, &time_until_expires)) {
if (ue_state->config.shortCycleConfigured) {
ue_state->state_before.inShortCycle = TRUE;
mac_lte_drx_start_timer(ue_state, drx_short_cycle_timer, 0);
}
}
/* Move subframe along by one */
if (ue_state->state_before.currentSF == 9) {
ue_state->state_before.currentSF = 0;
if (ue_state->state_before.currentSFN == 1023) {
ue_state->state_before.currentSFN = 0;
}
else {
ue_state->state_before.currentSFN++;
}
}
else {
ue_state->state_before.currentSF++;
}
}
/* Set current time to now */
ue_state->state_before.currentTime = pinfo->fd->abs_ts;
}
}
/* Set DRX information to display for the current MAC frame.
Only called on first pass through frames. */
static void set_drx_info(packet_info *pinfo, mac_lte_info *p_mac_lte_info, gboolean before_event)
{
/* Look up state of this UE */
drx_state_t *ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state,
GUINT_TO_POINTER((guint)p_mac_lte_info->ueid));
drx_state_t *frame_result;
if (ue_state != NULL) {
/* Should only need to allocate frame_result and add to the result table when
before PDU is processed */
if (before_event) {
/* Copy UE snapshot for this frame, and add to result table */
frame_result = wmem_new(wmem_file_scope(), drx_state_t);
/* Deep-copy this snapshot for this frame */
*frame_result = *ue_state;
/* And store in table */
g_hash_table_insert(mac_lte_drx_frame_result, GUINT_TO_POINTER(pinfo->fd->num), frame_result);
}
else {
/* After update, so just copy ue_state 'state' info after part of frame */
frame_result = (drx_state_t*)g_hash_table_lookup(mac_lte_drx_frame_result,
GUINT_TO_POINTER(pinfo->fd->num));
if (frame_result != NULL) {
/* Deep-copy updated state from UE */
frame_result->state_after = ue_state->state_before;
}
}
}
}
/* Show DRX information associated with this MAC frame */
static void show_drx_info(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb,
mac_lte_info *p_mac_lte_info, gboolean before_event)
{
drx_state_t *frame_state;
drx_running_state_t *state_to_show;
guint64 time_until_expires;
guint n;
/* Look up entry by frame number in result table */
frame_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_frame_result,
GUINT_TO_POINTER(pinfo->fd->num));
/* Show available information */
if (frame_state != NULL) {
proto_tree *drx_config_tree, *drx_state_tree;
proto_item *drx_config_ti, *drx_state_ti, *ti;
/* Show config only if 'before */
if (before_event) {
/************************************/
/* Create config subtree */
drx_config_ti = proto_tree_add_string_format(tree, hf_mac_lte_drx_config,
tvb, 0, 0, "", "DRX Config");
drx_config_tree = proto_item_add_subtree(drx_config_ti, ett_mac_lte_drx_config);
PROTO_ITEM_SET_GENERATED(drx_config_ti);
/* Link back to configuration (RRC) frame */
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_frame_num, tvb,
0, 0, frame_state->config.frameNum);
PROTO_ITEM_SET_GENERATED(ti);
/* Link back to any previous config frame (only from current config frame) */
if ((frame_state->config.frameNum == pinfo->fd->num) &&
(frame_state->config.previousFrameNum != 0)) {
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_previous_frame_num, tvb,
0, 0, frame_state->config.previousFrameNum);
PROTO_ITEM_SET_GENERATED(ti);
}
/* Config fields */
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_long_cycle, tvb,
0, 0, frame_state->config.longCycle);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_cycle_offset, tvb,
0, 0, frame_state->config.cycleOffset);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_onduration_timer, tvb,
0, 0, frame_state->config.onDurationTimer);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_inactivity_timer, tvb,
0, 0, frame_state->config.inactivityTimer);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_retransmission_timer, tvb,
0, 0, frame_state->config.retransmissionTimer);
PROTO_ITEM_SET_GENERATED(ti);
if (frame_state->config.shortCycleConfigured) {
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_short_cycle, tvb,
0, 0, frame_state->config.shortCycle);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(drx_config_tree, hf_mac_lte_drx_config_short_cycle_timer, tvb,
0, 0, frame_state->config.shortCycleTimer);
PROTO_ITEM_SET_GENERATED(ti);
}
proto_item_append_text(drx_config_ti, " (Long-cycle=%u cycle-offset=%u onDuration=%u)",
frame_state->config.longCycle, frame_state->config.cycleOffset,
frame_state->config.onDurationTimer);
if (frame_state->config.shortCycleConfigured) {
proto_item_append_text(drx_config_ti, " (Short-cycle=%u Short-cycle-timer=%u)",
frame_state->config.shortCycle, frame_state->config.shortCycleTimer);
}
}
/*************************************/
/* Create state subtree */
drx_state_ti = proto_tree_add_string_format(tree, hf_mac_lte_drx_state,
tvb, 0, 0, "",
(before_event) ? "DRX State Before" : "DRX State After");
/* Get appropriate state pointer to use below */
if (before_event) {
state_to_show = &frame_state->state_before;
}
else {
state_to_show = &frame_state->state_after;
}
drx_state_tree = proto_item_add_subtree(drx_state_ti, ett_mac_lte_drx_state);
PROTO_ITEM_SET_GENERATED(drx_state_ti);
/* Show cycle information */
if (!state_to_show->inShortCycle) {
/* Show where we are in current long cycle */
guint16 offset_into_long_cycle = ((p_mac_lte_info->sysframeNumber*10) + p_mac_lte_info->subframeNumber) %
frame_state->config.longCycle;
ti = proto_tree_add_uint(drx_state_tree, hf_mac_lte_drx_state_long_cycle_offset, tvb,
0, 0, offset_into_long_cycle);
PROTO_ITEM_SET_GENERATED(ti);
/* Show whether we're inside long cycle on-duration */
ti = proto_tree_add_boolean(drx_state_tree, hf_mac_lte_drx_state_long_cycle_on, tvb,
0, 0, state_to_show->inOnDuration);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(drx_state_ti, " (Offset-into-Long=%u, Long-cycle-on=%s)",
offset_into_long_cycle, state_to_show->inOnDuration ? "True" : "False");
}
else {
/* Show where we are inside short cycle */
guint16 offset_into_short_cycle = ((p_mac_lte_info->sysframeNumber*10) + p_mac_lte_info->subframeNumber) %
frame_state->config.shortCycle;
ti = proto_tree_add_uint(drx_state_tree, hf_mac_lte_drx_state_short_cycle_offset, tvb,
0, 0, offset_into_short_cycle);
PROTO_ITEM_SET_GENERATED(ti);
/* Show whether we're inside short cycle on-duration */
ti = proto_tree_add_boolean(drx_state_tree, hf_mac_lte_drx_state_short_cycle_on, tvb,
0, 0, state_to_show->inOnDuration);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(drx_state_ti, " (Offset-into-Short=%u, Long-cycle-on=%s)",
offset_into_short_cycle, state_to_show->inOnDuration ? "True" : "False");
/* Is short-cycle-timer running? */
/* TODO: do we need this and the boolean above? */
if (!mac_lte_drx_has_timer_expired(frame_state, drx_short_cycle_timer, 0, before_event, &time_until_expires)) {
ti = proto_tree_add_uint(drx_state_tree, hf_mac_lte_drx_state_short_cycle_remaining, tvb,
0, 0, (guint16)time_until_expires);
PROTO_ITEM_SET_GENERATED(ti);
}
}
/* Show which timers are still running and how long they have to go.
TODO: Complain if it looks like DRX looks like it should be on
TODO: if PDU is a retranmission, would be good to check to see if DRX
would have been on for original Tx! */
/* Is onduration timer running? */
if (!mac_lte_drx_has_timer_expired(frame_state, drx_onduration_timer, 0, before_event, &time_until_expires)) {
ti = proto_tree_add_uint(drx_state_tree, hf_mac_lte_drx_state_onduration_remaining, tvb,
0, 0, (guint16)time_until_expires);
PROTO_ITEM_SET_GENERATED(ti);
}
/* Is inactivity timer running? */
if (!mac_lte_drx_has_timer_expired(frame_state, drx_inactivity_timer, 0, before_event, &time_until_expires)) {
ti = proto_tree_add_uint(drx_state_tree, hf_mac_lte_drx_state_inactivity_remaining, tvb,
0, 0, (guint16)time_until_expires);
PROTO_ITEM_SET_GENERATED(ti);
}
/* Are any of the Retransmission timers running? */
for (n=0; n < 8; n++) {
if (!mac_lte_drx_has_timer_expired(frame_state, drx_retx_timer, n, before_event, &time_until_expires)) {
ti = proto_tree_add_uint(drx_state_tree, hf_mac_lte_drx_state_retransmission_remaining, tvb,
0, 0, (guint16)time_until_expires);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(ti, " (harqid=%u)", n);
}
}
/* Are any of the RTT timers running? */
for (n=0; n < 8; n++) {
if (!mac_lte_drx_has_timer_expired(frame_state, drx_rtt_timer, n, before_event, &time_until_expires)) {
ti = proto_tree_add_uint(drx_state_tree, hf_mac_lte_drx_state_rtt_remaining, tvb,
0, 0, (guint16)time_until_expires);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(ti, " (harqid=%u)", n);
}
}
}
}
/**************************************************************************/
/* Forward declarations */
void dissect_mac_lte(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static guint8 get_mac_lte_channel_priority(guint16 ueid _U_, guint8 lcid,
guint8 direction);
/* Heuristic dissection */
static gboolean global_mac_lte_heur = FALSE;
static void call_with_catch_all(dissector_handle_t handle, tvbuff_t* tvb, packet_info *pinfo, proto_tree *tree)
{
/* Call it (catch exceptions so that stats will be updated) */
TRY {
call_dissector_only(handle, tvb, pinfo, tree, NULL);
}
CATCH_ALL {
}
ENDTRY
}
/* Dissect context fields in the format described in packet-mac-lte.h.
Return TRUE if the necessary information was successfully found */
gboolean dissect_mac_lte_context_fields(struct mac_lte_info *p_mac_lte_info, tvbuff_t *tvb,
gint *p_offset)
{
gint offset = *p_offset;
guint8 tag = 0;
/* Read fixed fields */
p_mac_lte_info->radioType = tvb_get_guint8(tvb, offset++);
p_mac_lte_info->direction = tvb_get_guint8(tvb, offset++);
/* TODO: currently no support for detailed PHY info... */
if (p_mac_lte_info->direction == DIRECTION_UPLINK) {
p_mac_lte_info->detailed_phy_info.ul_info.present = FALSE;
}
else {
p_mac_lte_info->detailed_phy_info.dl_info.present = FALSE;
}
p_mac_lte_info->rntiType = tvb_get_guint8(tvb, offset++);
/* Initialize RNTI with a default value in case optional field is not present */
switch (p_mac_lte_info->rntiType) {
case M_RNTI:
p_mac_lte_info->rnti = 0xFFFD;
break;
case P_RNTI:
p_mac_lte_info->rnti = 0xFFFE;
break;
case SI_RNTI:
p_mac_lte_info->rnti = 0xFFFF;
break;
case RA_RNTI:
case C_RNTI:
case SPS_RNTI:
p_mac_lte_info->rnti = 0x0001;
break;
default:
break;
}
/* Read optional fields */
while (tag != MAC_LTE_PAYLOAD_TAG) {
/* Process next tag */
tag = tvb_get_guint8(tvb, offset++);
switch (tag) {
case MAC_LTE_RNTI_TAG:
p_mac_lte_info->rnti = tvb_get_ntohs(tvb, offset);
offset += 2;
break;
case MAC_LTE_UEID_TAG:
p_mac_lte_info->ueid = tvb_get_ntohs(tvb, offset);
offset += 2;
break;
case MAC_LTE_SUBFRAME_TAG:
p_mac_lte_info->subframeNumber = tvb_get_ntohs(tvb, offset);
offset += 2;
break;
case MAC_LTE_PREDEFINED_DATA_TAG:
p_mac_lte_info->isPredefinedData = tvb_get_guint8(tvb, offset);
offset++;
break;
case MAC_LTE_RETX_TAG:
p_mac_lte_info->reTxCount = tvb_get_guint8(tvb, offset);
offset++;
break;
case MAC_LTE_CRC_STATUS_TAG:
p_mac_lte_info->crcStatusValid = crc_success;
p_mac_lte_info->detailed_phy_info.dl_info.crc_status =
(mac_lte_crc_status)tvb_get_guint8(tvb, offset);
offset++;
break;
case MAC_LTE_EXT_BSR_SIZES_TAG:
p_mac_lte_info->isExtendedBSRSizes = TRUE;
break;
case MAC_LTE_PAYLOAD_TAG:
/* Have reached data, so set payload length and get out of loop */
/* TODO: this is not correct if there is padding which isn't in frame */
p_mac_lte_info->length= tvb_length_remaining(tvb, offset);
continue;
default:
/* It must be a recognised tag */
return FALSE;
}
}
/* Pass out where offset is now */
*p_offset = offset;
return TRUE;
}
/* Heuristic dissector looks for supported framing protocol (see wiki page) */
static gboolean dissect_mac_lte_heur(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *tree, void *data _U_)
{
gint offset = 0;
struct mac_lte_info *p_mac_lte_info;
tvbuff_t *mac_tvb;
gboolean infoAlreadySet = FALSE;
/* This is a heuristic dissector, which means we get all the UDP
* traffic not sent to a known dissector and not claimed by
* a heuristic dissector called before us!
*/
if (!global_mac_lte_heur) {
return FALSE;
}
/* Do this again on re-dissection to re-discover offset of actual PDU */
/* Needs to be at least as long as:
- the signature string
- fixed header bytes
- tag for data
- at least one byte of MAC PDU payload */
if (tvb_length_remaining(tvb, offset) < (gint)(strlen(MAC_LTE_START_STRING)+3+2)) {
return FALSE;
}
/* OK, compare with signature string */
if (tvb_strneql(tvb, offset, MAC_LTE_START_STRING, strlen(MAC_LTE_START_STRING)) != 0) {
return FALSE;
}
offset += (gint)strlen(MAC_LTE_START_STRING);
/* If redissecting, use previous info struct (if available) */
p_mac_lte_info = (mac_lte_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_mac_lte, 0);
if (p_mac_lte_info == NULL) {
/* Allocate new info struct for this frame */
p_mac_lte_info = wmem_new0(wmem_file_scope(), struct mac_lte_info);
infoAlreadySet = FALSE;
}
else {
infoAlreadySet = TRUE;
}
/* Dissect the fields to populate p_mac_lte */
if (!dissect_mac_lte_context_fields(p_mac_lte_info, tvb, &offset)) {
return FALSE;
}
if (!infoAlreadySet) {
/* Store info in packet */
p_add_proto_data(wmem_file_scope(), pinfo, proto_mac_lte, 0, p_mac_lte_info);
}
/**************************************/
/* OK, now dissect as MAC LTE */
/* Create tvb that starts at actual MAC PDU */
mac_tvb = tvb_new_subset_remaining(tvb, offset);
dissect_mac_lte(mac_tvb, pinfo, tree);
return TRUE;
}
/* Write the given formatted text to:
- the info column (if pinfo != NULL)
- 1 or 2 other labels (optional)
*/
static void write_pdu_label_and_info(proto_item *ti1, proto_item *ti2,
packet_info *pinfo, const char *format, ...)
{
#define MAX_INFO_BUFFER 256
static char info_buffer[MAX_INFO_BUFFER];
va_list ap;
if ((ti1 == NULL) && (ti2 == NULL) && (pinfo == NULL)) {
return;
}
va_start(ap, format);
g_vsnprintf(info_buffer, MAX_INFO_BUFFER, format, ap);
va_end(ap);
/* Add to indicated places */
if (pinfo != NULL) {
col_append_str(pinfo->cinfo, COL_INFO, info_buffer);
}
if (ti1 != NULL) {
proto_item_append_text(ti1, "%s", info_buffer);
}
if (ti2 != NULL) {
proto_item_append_text(ti2, "%s", info_buffer);
}
}
/* Version of function above, where no g_vsnprintf() call needed */
static void write_pdu_label_and_info_literal(proto_item *ti1, proto_item *ti2,
packet_info *pinfo, const char *info_buffer)
{
if ((ti1 == NULL) && (ti2 == NULL) && (pinfo == NULL)) {
return;
}
/* Add to indicated places */
if (pinfo != NULL) {
col_append_str(pinfo->cinfo, COL_INFO, info_buffer);
}
if (ti1 != NULL) {
proto_item_append_text(ti1, "%s", info_buffer);
}
if (ti2 != NULL) {
proto_item_append_text(ti2, "%s", info_buffer);
}
}
/* Show extra PHY parameters (if present) */
static void show_extra_phy_parameters(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree,
struct mac_lte_info *p_mac_lte_info)
{
proto_item *phy_ti;
proto_tree *phy_tree;
proto_item *ti;
if (global_mac_lte_layer_to_show == ShowPHYLayer) {
/* Clear the info column */
col_clear(pinfo->cinfo, COL_INFO);
}
if (p_mac_lte_info->direction == DIRECTION_UPLINK) {
if (p_mac_lte_info->detailed_phy_info.ul_info.present) {
/* Create root */
phy_ti = proto_tree_add_string_format(tree, hf_mac_lte_context_phy_ul,
tvb, 0, 0, "", "UL PHY Context");
phy_tree = proto_item_add_subtree(phy_ti, ett_mac_lte_phy_context);
PROTO_ITEM_SET_GENERATED(phy_ti);
/* Add items */
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_ul_modulation_type,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.ul_info.modulation_type);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_ul_tbs_index,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.ul_info.tbs_index);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_ul_resource_block_length,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.ul_info.resource_block_length);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_ul_resource_block_start,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.ul_info.resource_block_start);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_ul_harq_id,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.ul_info.harq_id);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_ul_ndi,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.ul_info.ndi);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(phy_ti, " (");
write_pdu_label_and_info(phy_ti, NULL,
(global_mac_lte_layer_to_show == ShowPHYLayer) ? pinfo : NULL,
"UL: UEId=%u RNTI=%u %s Tbs_Index=%u RB_len=%u RB_start=%u",
p_mac_lte_info->ueid,
p_mac_lte_info->rnti,
val_to_str_const(p_mac_lte_info->detailed_phy_info.ul_info.modulation_type,
modulation_type_vals, "Unknown"),
p_mac_lte_info->detailed_phy_info.ul_info.tbs_index,
p_mac_lte_info->detailed_phy_info.ul_info.resource_block_length,
p_mac_lte_info->detailed_phy_info.ul_info.resource_block_start);
proto_item_append_text(phy_ti, ")");
/* Don't want columns to be replaced now */
if (global_mac_lte_layer_to_show == ShowPHYLayer) {
col_set_writable(pinfo->cinfo, FALSE);
}
}
}
else {
if (p_mac_lte_info->detailed_phy_info.dl_info.present) {
/* Create root */
phy_ti = proto_tree_add_string_format(tree, hf_mac_lte_context_phy_dl,
tvb, 0, 0, "", "DL PHY Context");
phy_tree = proto_item_add_subtree(phy_ti, ett_mac_lte_phy_context);
PROTO_ITEM_SET_GENERATED(phy_ti);
/* Add items */
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_dci_format,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.dci_format);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_resource_allocation_type,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.resource_allocation_type);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_aggregation_level,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.aggregation_level);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_mcs_index,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.mcs_index);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_redundancy_version_index,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.redundancy_version_index);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_boolean(phy_tree, hf_mac_lte_context_phy_dl_retx,
tvb, 0, 0,
p_mac_lte_info->dl_retx);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_resource_block_length,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.resource_block_length);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_crc_status,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.crc_status);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_harq_id,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.harq_id);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_ndi,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.ndi);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(phy_tree, hf_mac_lte_context_phy_dl_tb,
tvb, 0, 0,
p_mac_lte_info->detailed_phy_info.dl_info.transport_block);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(phy_ti, " (");
write_pdu_label_and_info(phy_ti, NULL,
(global_mac_lte_layer_to_show == ShowPHYLayer) ? pinfo : NULL,
"DL: UEId=%u RNTI=%u DCI_Format=%s Res_Alloc=%u Aggr_Level=%s MCS=%u RV=%u "
"Res_Block_len=%u CRC_status=%s HARQ_id=%u NDI=%u",
p_mac_lte_info->ueid,
p_mac_lte_info->rnti,
val_to_str_const(p_mac_lte_info->detailed_phy_info.dl_info.dci_format,
dci_format_vals, "Unknown"),
p_mac_lte_info->detailed_phy_info.dl_info.resource_allocation_type,
val_to_str_const(p_mac_lte_info->detailed_phy_info.dl_info.aggregation_level,
aggregation_level_vals, "Unknown"),
p_mac_lte_info->detailed_phy_info.dl_info.mcs_index,
p_mac_lte_info->detailed_phy_info.dl_info.redundancy_version_index,
p_mac_lte_info->detailed_phy_info.dl_info.resource_block_length,
val_to_str_const(p_mac_lte_info->detailed_phy_info.dl_info.crc_status,
crc_status_vals, "Unknown"),
p_mac_lte_info->detailed_phy_info.dl_info.harq_id,
p_mac_lte_info->detailed_phy_info.dl_info.ndi);
proto_item_append_text(phy_ti, ")");
/* Don't want columns to be replaced now */
if (global_mac_lte_layer_to_show == ShowPHYLayer) {
col_set_writable(pinfo->cinfo, FALSE);
}
}
}
}
/* Dissect a single Random Access Reponse body */
static gint dissect_rar_entry(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_item *pdu_ti,
gint offset, guint8 rapid)
{
guint8 reserved;
guint start_body_offset = offset;
proto_item *ti;
proto_item *rar_body_ti;
proto_tree *rar_body_tree;
proto_tree *ul_grant_tree;
proto_item *ul_grant_ti;
guint16 timing_advance;
guint32 ul_grant;
guint16 temp_crnti;
/* Create tree for this Body */
rar_body_ti = proto_tree_add_item(tree,
hf_mac_lte_rar_body,
tvb, offset, 0, ENC_ASCII|ENC_NA);
rar_body_tree = proto_item_add_subtree(rar_body_ti, ett_mac_lte_rar_body);
/* Dissect an RAR entry */
/* Check reserved bit */
reserved = (tvb_get_guint8(tvb, offset) & 0x80) >> 7;
ti = proto_tree_add_item(rar_body_tree, hf_mac_lte_rar_reserved2, tvb, offset, 1, ENC_BIG_ENDIAN);
if (reserved != 0) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero, "RAR body Reserved bit not zero (found 0x%x)", reserved);
}
/* Timing Advance */
timing_advance = (tvb_get_ntohs(tvb, offset) & 0x7ff0) >> 4;
ti = proto_tree_add_item(rar_body_tree, hf_mac_lte_rar_ta, tvb, offset, 2, ENC_BIG_ENDIAN);
if (timing_advance != 0) {
if (timing_advance <= 31) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_rar_timing_advance_not_zero_note,
"RAR Timing advance not zero (%u)", timing_advance);
} else {
expert_add_info_format(pinfo, ti, &ei_mac_lte_rar_timing_advance_not_zero_warn,
"RAR Timing advance not zero (%u)", timing_advance);
}
}
offset++;
/* UL Grant */
ul_grant = (tvb_get_ntohl(tvb, offset) & 0x0fffff00) >> 8;
ul_grant_ti = proto_tree_add_item(rar_body_tree, hf_mac_lte_rar_ul_grant, tvb, offset, 3, ENC_BIG_ENDIAN);
/* Break these 20 bits down as described in 36.213, section 6.2 */
/* Create subtree for UL grant break-down */
ul_grant_tree = proto_item_add_subtree(ul_grant_ti, ett_mac_lte_rar_ul_grant);
/* Hopping flag (1 bit) */
proto_tree_add_item(ul_grant_tree, hf_mac_lte_rar_ul_grant_hopping,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* Fixed sized resource block assignment (10 bits) */
proto_tree_add_item(ul_grant_tree, hf_mac_lte_rar_ul_grant_fsrba,
tvb, offset, 2, ENC_BIG_ENDIAN);
/* Truncated Modulation and coding scheme (4 bits) */
proto_tree_add_item(ul_grant_tree, hf_mac_lte_rar_ul_grant_tmcs,
tvb, offset+1, 2, ENC_BIG_ENDIAN);
/* TPC command for scheduled PUSCH (3 bits) */
proto_tree_add_item(ul_grant_tree, hf_mac_lte_rar_ul_grant_tcsp,
tvb, offset+2, 1, ENC_BIG_ENDIAN);
/* UL delay (1 bit) */
proto_tree_add_item(ul_grant_tree, hf_mac_lte_rar_ul_grant_ul_delay,
tvb, offset+2, 1, ENC_BIG_ENDIAN);
/* CQI request (1 bit) */
proto_tree_add_item(ul_grant_tree, hf_mac_lte_rar_ul_grant_cqi_request,
tvb, offset+2, 1, ENC_BIG_ENDIAN);
offset += 3;
/* Temporary C-RNTI */
temp_crnti = tvb_get_ntohs(tvb, offset);
proto_tree_add_item(rar_body_tree, hf_mac_lte_rar_temporary_crnti, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
write_pdu_label_and_info(pdu_ti, rar_body_ti, pinfo,
"(RAPID=%u: TA=%u, UL-Grant=%u, Temp C-RNTI=%u) ",
rapid, timing_advance, ul_grant, temp_crnti);
proto_item_set_len(rar_body_ti, offset-start_body_offset);
return offset;
}
#define MAX_RAR_PDUS 64
/* Dissect Random Access Reponse (RAR) PDU */
static void dissect_rar(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_item *pdu_ti,
gint offset, mac_lte_info *p_mac_lte_info, mac_lte_tap_info *tap_info)
{
gint number_of_rars = 0; /* No of RAR bodies expected following headers */
guint8 *rapids = (guint8 *)wmem_alloc(wmem_packet_scope(), MAX_RAR_PDUS * sizeof(guint8));
gboolean backoff_indicator_seen = FALSE;
guint8 backoff_indicator = 0;
guint8 extension;
gint n;
proto_tree *rar_headers_tree;
proto_item *ti;
proto_item *rar_headers_ti;
proto_item *padding_length_ti;
int start_headers_offset = offset;
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"RAR (RA-RNTI=%u, SF=%u) ",
p_mac_lte_info->rnti, p_mac_lte_info->subframeNumber);
/* Create hidden 'virtual root' so can filter on mac-lte.rar */
ti = proto_tree_add_item(tree, hf_mac_lte_rar, tvb, offset, -1, ENC_NA);
PROTO_ITEM_SET_HIDDEN(ti);
/* Create headers tree */
rar_headers_ti = proto_tree_add_item(tree,
hf_mac_lte_rar_headers,
tvb, offset, 0, ENC_ASCII|ENC_NA);
rar_headers_tree = proto_item_add_subtree(rar_headers_ti, ett_mac_lte_rar_headers);
/***************************/
/* Read the header entries */
do {
int start_header_offset = offset;
proto_tree *rar_header_tree;
proto_item *rar_header_ti;
guint8 type_value;
guint8 first_byte = tvb_get_guint8(tvb, offset);
/* Create tree for this header */
rar_header_ti = proto_tree_add_item(rar_headers_tree,
hf_mac_lte_rar_header,
tvb, offset, 0, ENC_ASCII|ENC_NA);
rar_header_tree = proto_item_add_subtree(rar_header_ti, ett_mac_lte_rar_header);
/* Extension */
extension = (first_byte & 0x80) >> 7;
proto_tree_add_item(rar_header_tree, hf_mac_lte_rar_extension, tvb, offset, 1, ENC_BIG_ENDIAN);
/* Type */
type_value = (first_byte & 0x40) >> 6;
proto_tree_add_item(rar_header_tree, hf_mac_lte_rar_t, tvb, offset, 1, ENC_BIG_ENDIAN);
if (type_value == 0) {
/* Backoff Indicator (BI) case */
guint8 reserved;
proto_item *tii;
proto_item *bi_ti;
/* 2 Reserved bits */
reserved = (tvb_get_guint8(tvb, offset) & 0x30) >> 4;
tii = proto_tree_add_item(rar_header_tree, hf_mac_lte_rar_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
if (reserved != 0) {
expert_add_info_format(pinfo, tii, &ei_mac_lte_reserved_not_zero,
"RAR header Reserved bits not zero (found 0x%x)", reserved);
}
/* Backoff Indicator */
backoff_indicator = tvb_get_guint8(tvb, offset) & 0x0f;
bi_ti = proto_tree_add_item(rar_header_tree, hf_mac_lte_rar_bi, tvb, offset, 1, ENC_BIG_ENDIAN);
/* As of March 2009 spec, it must be first, and may only appear once */
if (backoff_indicator_seen) {
expert_add_info(pinfo, bi_ti, &ei_mac_lte_rar_bi_present);
}
backoff_indicator_seen = TRUE;
write_pdu_label_and_info(pdu_ti, rar_header_ti, pinfo,
"(Backoff Indicator=%sms)",
val_to_str_const(backoff_indicator, rar_bi_vals, "Illegal-value "));
/* If present, it must be the first subheader */
if (number_of_rars > 0) {
expert_add_info(pinfo, bi_ti, &ei_mac_lte_rar_bi_not_first_subheader);
}
}
else {
/* RAPID case */
/* TODO: complain if the same RAPID appears twice in same frame? */
rapids[number_of_rars] = tvb_get_guint8(tvb, offset) & 0x3f;
proto_tree_add_item(rar_header_tree, hf_mac_lte_rar_rapid, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_item_append_text(rar_header_ti, "(RAPID=%u)", rapids[number_of_rars]);
number_of_rars++;
}
offset++;
/* Finalise length of header tree selection */
proto_item_set_len(rar_header_ti, offset - start_header_offset);
} while (extension && number_of_rars < MAX_RAR_PDUS);
/* Append summary to headers root */
proto_item_append_text(rar_headers_ti, " (%u RARs", number_of_rars);
ti = proto_tree_add_uint(rar_headers_tree, hf_mac_lte_rar_no_of_rapids, tvb, 0, 0, number_of_rars);
PROTO_ITEM_SET_GENERATED(ti);
if (backoff_indicator_seen) {
proto_item_append_text(rar_headers_ti, ", BI=%sms)",
val_to_str_const(backoff_indicator, rar_bi_vals, "Illegal-value "));
}
else {
proto_item_append_text(rar_headers_ti, ")");
}
/* Set length for headers root */
proto_item_set_len(rar_headers_ti, offset-start_headers_offset);
/***************************/
/* Read any indicated RARs */
for (n=0; n < number_of_rars; n++) {
offset = dissect_rar_entry(tvb, pinfo, tree, pdu_ti, offset, rapids[n]);
}
/* Update TAP info */
tap_info->number_of_rars += number_of_rars;
/* Padding may follow */
if (tvb_length_remaining(tvb, offset) > 0) {
proto_tree_add_item(tree, hf_mac_lte_padding_data,
tvb, offset, -1, ENC_NA);
}
padding_length_ti = proto_tree_add_int(tree, hf_mac_lte_padding_length,
tvb, offset, 0,
p_mac_lte_info->length - offset);
PROTO_ITEM_SET_GENERATED(padding_length_ti);
/* Update padding bytes in stats */
tap_info->padding_bytes += (p_mac_lte_info->length - offset);
}
/* Dissect BCH PDU */
static void dissect_bch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_item *pdu_ti,
int offset, mac_lte_info *p_mac_lte_info)
{
proto_item *ti;
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"BCH PDU (%u bytes, on %s transport) ",
tvb_length_remaining(tvb, offset),
val_to_str_const(p_mac_lte_info->rntiType,
bch_transport_channel_vals,
"Unknown"));
/* Show which transport layer it came in on (inferred from RNTI type) */
ti = proto_tree_add_uint(tree, hf_mac_lte_context_bch_transport_channel,
tvb, offset, 0, p_mac_lte_info->rntiType);
PROTO_ITEM_SET_GENERATED(ti);
/****************************************/
/* Whole frame is BCH data */
/* Raw data */
ti = proto_tree_add_item(tree, hf_mac_lte_bch_pdu,
tvb, offset, -1, ENC_NA);
if (global_mac_lte_attempt_rrc_decode) {
/* Attempt to decode payload using LTE RRC dissector */
tvbuff_t *rrc_tvb = tvb_new_subset_remaining(tvb, offset);
/* Get appropriate dissector handle */
dissector_handle_t protocol_handle = 0;
if (p_mac_lte_info->rntiType == SI_RNTI) {
protocol_handle = find_dissector("lte_rrc.bcch_dl_sch");
}
else {
protocol_handle = find_dissector("lte_rrc.bcch_bch");
}
/* Hide raw view of bytes */
PROTO_ITEM_SET_HIDDEN(ti);
call_with_catch_all(protocol_handle, rrc_tvb, pinfo, tree);
}
/* Check that this *is* downlink! */
if (p_mac_lte_info->direction == DIRECTION_UPLINK) {
expert_add_info(pinfo, ti, &ei_mac_lte_bch_pdu);
}
}
/* Dissect PCH PDU */
static void dissect_pch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_item *pdu_ti, int offset, guint8 direction, mac_lte_tap_info *tap_info)
{
proto_item *ti;
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"PCH PDU (%u bytes) ",
tvb_length_remaining(tvb, offset));
/****************************************/
/* Whole frame is PCH data */
/* Always show as raw data */
ti = proto_tree_add_item(tree, hf_mac_lte_pch_pdu,
tvb, offset, -1, ENC_NA);
/* Get number of paging IDs for tap */
tap_info->number_of_paging_ids = (tvb_get_guint8(tvb, offset) & 0x40) ?
((tvb_get_ntohs(tvb, offset) >> 7) & 0x000f) + 1 : 0;
if (global_mac_lte_attempt_rrc_decode) {
/* Attempt to decode payload using LTE RRC dissector */
tvbuff_t *rrc_tvb = tvb_new_subset_remaining(tvb, offset);
/* Get appropriate dissector handle */
dissector_handle_t protocol_handle = find_dissector("lte_rrc.pcch");
/* Hide raw view of bytes */
PROTO_ITEM_SET_HIDDEN(ti);
/* Call it (catch exceptions so that stats will be updated) */
call_with_catch_all(protocol_handle, rrc_tvb, pinfo, tree);
}
/* Check that this *is* downlink! */
if (direction == DIRECTION_UPLINK) {
expert_add_info(pinfo, ti, &ei_mac_lte_pch_pdu);
}
}
/* Does this header entry correspond to a fixed-sized control element? */
static int is_fixed_sized_control_element(guint8 lcid, guint8 direction)
{
if (direction == DIRECTION_UPLINK) {
/* Uplink */
switch (lcid) {
case POWER_HEADROOM_REPORT_LCID:
case CRNTI_LCID:
case TRUNCATED_BSR_LCID:
case SHORT_BSR_LCID:
case LONG_BSR_LCID:
return TRUE;
default:
return FALSE;
}
}
else {
/* Assume Downlink */
switch (lcid) {
case ACTIVATION_DEACTIVATION_LCID:
case UE_CONTENTION_RESOLUTION_IDENTITY_LCID:
case TIMING_ADVANCE_LCID:
case DRX_COMMAND_LCID:
return TRUE;
default:
return FALSE;
}
}
}
/* Is this a BSR report header? */
static int is_bsr_lcid(guint8 lcid)
{
return ((lcid == TRUNCATED_BSR_LCID) ||
(lcid == SHORT_BSR_LCID) ||
(lcid == LONG_BSR_LCID));
}
/* Helper function to call RLC dissector for SDUs (where channel params are known) */
static void call_rlc_dissector(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_item *pdu_ti,
int offset, guint16 data_length,
guint8 mode, guint8 direction, guint16 ueid,
guint16 channelType, guint16 channelId,
guint8 UMSequenceNumberLength,
guint8 priority)
{
tvbuff_t *rb_tvb = tvb_new_subset(tvb, offset, data_length, data_length);
struct rlc_lte_info *p_rlc_lte_info;
/* Resuse or create RLC info */
p_rlc_lte_info = (rlc_lte_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_rlc_lte, 0);
if (p_rlc_lte_info == NULL) {
p_rlc_lte_info = wmem_new0(wmem_file_scope(), struct rlc_lte_info);
}
/* Fill in struct details for srb channels */
p_rlc_lte_info->rlcMode = mode;
p_rlc_lte_info->direction = direction;
p_rlc_lte_info->priority = priority;
p_rlc_lte_info->ueid = ueid;
p_rlc_lte_info->channelType = channelType;
p_rlc_lte_info->channelId = channelId;
p_rlc_lte_info->pduLength = data_length;
p_rlc_lte_info->UMSequenceNumberLength = UMSequenceNumberLength;
/* Store info in packet */
p_add_proto_data(wmem_file_scope(), pinfo, proto_rlc_lte, 0, p_rlc_lte_info);
if (global_mac_lte_layer_to_show != ShowRLCLayer) {
/* Don't want these columns replaced */
col_set_writable(pinfo->cinfo, FALSE);
}
else {
/* Clear info column before first RLC PDU */
if (s_number_of_rlc_pdus_shown == 0) {
col_clear(pinfo->cinfo, COL_INFO);
}
else {
/* Add a separator and protect column contents here */
write_pdu_label_and_info_literal(pdu_ti, NULL, pinfo, " || ");
col_set_fence(pinfo->cinfo, COL_INFO);
}
}
s_number_of_rlc_pdus_shown++;
/* Call it (catch exceptions so that stats will be updated) */
call_with_catch_all(rlc_lte_handle, rb_tvb, pinfo, tree);
/* Let columns be written to again */
col_set_writable(pinfo->cinfo, TRUE);
}
/* For DL frames, look for previous Tx. Add link back if found */
static void TrackReportedDLHARQResend(packet_info *pinfo, tvbuff_t *tvb, volatile int length,
proto_tree *tree, mac_lte_info *p_mac_lte_info)
{
DLHARQResult *result = NULL;
DLHARQResult *original_result = NULL;
/* If don't have detailed DL PHy info, just give up */
if (!p_mac_lte_info->detailed_phy_info.dl_info.present) {
return;
}
/* TDD may not work... */
if (!pinfo->fd->flags.visited) {
/* First time, so set result and update DL harq table */
LastFrameData *lastData = NULL;
LastFrameData *thisData = NULL;
DLHarqBuffers *ueData;
/* Read these for convenience */
guint8 harq_id = p_mac_lte_info->detailed_phy_info.dl_info.harq_id;
guint8 transport_block = p_mac_lte_info->detailed_phy_info.dl_info.transport_block;
/* Check harq-id bounds, give up if invalid */
if ((harq_id >= 15) || (transport_block > 1)) {
return;
}
/* Look up entry for this UE/RNTI */
ueData = (DLHarqBuffers *)g_hash_table_lookup(mac_lte_dl_harq_hash, GUINT_TO_POINTER((guint)p_mac_lte_info->rnti));
if (ueData != NULL) {
/* Get previous info for this harq-id */
lastData = &(ueData->harqid[transport_block][harq_id]);
if (lastData->inUse) {
/* Compare time difference, ndi, data to see if this looks like a retx */
if ((length == lastData->length) &&
(p_mac_lte_info->detailed_phy_info.dl_info.ndi == lastData->ndi) &&
tvb_memeql(tvb, 0, lastData->data, MIN(lastData->length, MAX_EXPECTED_PDU_LENGTH)) == 0) {
/* Work out gap between frames */
gint seconds_between_packets = (gint)
(pinfo->fd->abs_ts.secs - lastData->received_time.secs);
gint nseconds_between_packets =
pinfo->fd->abs_ts.nsecs - lastData->received_time.nsecs;
/* Round difference to nearest millisecond */
gint total_gap = (seconds_between_packets*1000) +
((nseconds_between_packets+500000) / 1000000);
/* Expect to be within (say) 8-13 subframes since previous */
if ((total_gap >= 8) && (total_gap <= 13)) {
/* Resend detected! Store result pointing back. */
result = wmem_new0(wmem_file_scope(), DLHARQResult);
result->previousSet = TRUE;
result->previousFrameNum = lastData->framenum;
result->timeSincePreviousFrame = total_gap;
g_hash_table_insert(mac_lte_dl_harq_result_hash, GUINT_TO_POINTER(pinfo->fd->num), result);
/* Now make previous frame point forward to here */
original_result = (DLHARQResult *)g_hash_table_lookup(mac_lte_dl_harq_result_hash, GUINT_TO_POINTER(lastData->framenum));
if (original_result == NULL) {
original_result = wmem_new0(wmem_file_scope(), DLHARQResult);
g_hash_table_insert(mac_lte_dl_harq_result_hash, GUINT_TO_POINTER(lastData->framenum), original_result);
}
original_result->nextSet = TRUE;
original_result->nextFrameNum = pinfo->fd->num;
original_result->timeToNextFrame = total_gap;
}
}
}
}
else {
/* Allocate entry in table for this UE/RNTI */
ueData = wmem_new0(wmem_file_scope(), DLHarqBuffers);
g_hash_table_insert(mac_lte_dl_harq_hash, GUINT_TO_POINTER((guint)p_mac_lte_info->rnti), ueData);
}
/* Store this frame's details in table */
thisData = &(ueData->harqid[transport_block][harq_id]);
thisData->inUse = TRUE;
thisData->length = length;
tvb_memcpy(tvb, thisData->data, 0, MIN(thisData->length, MAX_EXPECTED_PDU_LENGTH));
thisData->ndi = p_mac_lte_info->detailed_phy_info.dl_info.ndi;
thisData->framenum = pinfo->fd->num;
thisData->received_time = pinfo->fd->abs_ts;
}
else {
/* Not first time, so just set whats already stored in result */
result = (DLHARQResult *)g_hash_table_lookup(mac_lte_dl_harq_result_hash, GUINT_TO_POINTER(pinfo->fd->num));
}
/***************************************************/
/* Show link back to original frame (if available) */
if (result != NULL) {
if (result->previousSet) {
proto_item *gap_ti;
proto_item *original_ti = proto_tree_add_uint(tree, hf_mac_lte_dl_harq_resend_original_frame,
tvb, 0, 0, result->previousFrameNum);
PROTO_ITEM_SET_GENERATED(original_ti);
gap_ti = proto_tree_add_uint(tree, hf_mac_lte_dl_harq_resend_time_since_previous_frame,
tvb, 0, 0, result->timeSincePreviousFrame);
PROTO_ITEM_SET_GENERATED(gap_ti);
}
if (result->nextSet) {
proto_item *gap_ti;
proto_item *next_ti = proto_tree_add_uint(tree, hf_mac_lte_dl_harq_resend_next_frame,
tvb, 0, 0, result->nextFrameNum);
PROTO_ITEM_SET_GENERATED(next_ti);
gap_ti = proto_tree_add_uint(tree, hf_mac_lte_dl_harq_resend_time_until_next_frame,
tvb, 0, 0, result->timeToNextFrame);
PROTO_ITEM_SET_GENERATED(gap_ti);
}
}
}
/* Return TRUE if the given packet is thought to be a retx */
int is_mac_lte_frame_retx(packet_info *pinfo, guint8 direction)
{
struct mac_lte_info *p_mac_lte_info = (struct mac_lte_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_mac_lte, 0);
if (p_mac_lte_info == NULL) {
return FALSE;
}
if (direction == DIRECTION_UPLINK) {
/* For UL, retx count is stored in per-packet struct */
return (p_mac_lte_info->reTxCount > 0);
}
else {
/* Use answer if told directly */
if (p_mac_lte_info->dl_retx == dl_retx_yes) {
return TRUE;
}
else {
/* Otherwise look up in table */
DLHARQResult *result = (DLHARQResult *)g_hash_table_lookup(mac_lte_dl_harq_result_hash, GUINT_TO_POINTER(pinfo->fd->num));
return ((result != NULL) && result->previousSet);
}
}
}
/* Track UL frames, so that when a retx is indicated, we can search for
the original tx. We will either find it, and provide a link back to it,
or flag that we couldn't find as an expert error */
static void TrackReportedULHARQResend(packet_info *pinfo, tvbuff_t *tvb, volatile int offset,
proto_tree *tree, mac_lte_info *p_mac_lte_info,
proto_item *retx_ti)
{
ULHARQResult *result = NULL;
/* If don't have detailed DL PHY info, just give up */
if (!p_mac_lte_info->detailed_phy_info.ul_info.present) {
return;
}
/* Give up if harqid is out of range */
if (p_mac_lte_info->detailed_phy_info.ul_info.harq_id >= 8) {
return;
}
if (!pinfo->fd->flags.visited) {
/* First time, so set result and update UL harq table */
LastFrameData *lastData = NULL;
LastFrameData *thisData = NULL;
/* Look up entry for this UE/RNTI */
ULHarqBuffers *ueData = (ULHarqBuffers *)g_hash_table_lookup(
mac_lte_ul_harq_hash, GUINT_TO_POINTER((guint)p_mac_lte_info->rnti));
if (ueData != NULL) {
if (p_mac_lte_info->reTxCount >= 1) {
/* Looking for frame previously on this harq-id */
lastData = &(ueData->harqid[p_mac_lte_info->detailed_phy_info.ul_info.harq_id]);
if (lastData->inUse) {
/* Compare time, sf, data to see if this looks like a retx */
if ((tvb_length_remaining(tvb, offset) == lastData->length) &&
(p_mac_lte_info->detailed_phy_info.ul_info.ndi == lastData->ndi) &&
tvb_memeql(tvb, offset, lastData->data, MIN(lastData->length, MAX_EXPECTED_PDU_LENGTH)) == 0) {
/* Work out gap between frames */
gint seconds_between_packets = (gint)
(pinfo->fd->abs_ts.secs - lastData->received_time.secs);
gint nseconds_between_packets =
pinfo->fd->abs_ts.nsecs - lastData->received_time.nsecs;
/* Round to nearest ms */
gint total_gap = (seconds_between_packets*1000) +
((nseconds_between_packets+500000) / 1000000);
/* Could be as many as max-tx (which we don't know) * 8ms ago.
32 is the most I've seen... */
if (total_gap <= 33) {
ULHARQResult *original_result;
/* Original detected!!! Store result pointing back */
result = wmem_new0(wmem_file_scope(), ULHARQResult);
result->previousSet = TRUE;
result->previousFrameNum = lastData->framenum;
result->timeSincePreviousFrame = total_gap;
g_hash_table_insert(mac_lte_ul_harq_result_hash, GUINT_TO_POINTER(pinfo->fd->num), result);
/* Now make previous frame point forward to here */
original_result = (ULHARQResult *)g_hash_table_lookup(mac_lte_ul_harq_result_hash, GUINT_TO_POINTER(lastData->framenum));
if (original_result == NULL) {
original_result = wmem_new0(wmem_file_scope(), ULHARQResult);
g_hash_table_insert(mac_lte_ul_harq_result_hash, GUINT_TO_POINTER(lastData->framenum), original_result);
}
original_result->nextSet = TRUE;
original_result->nextFrameNum = pinfo->fd->num;
original_result->timeToNextFrame = total_gap;
}
}
}
}
}
else {
/* Allocate entry in table for this UE/RNTI */
ueData = wmem_new0(wmem_file_scope(), ULHarqBuffers);
g_hash_table_insert(mac_lte_ul_harq_hash, GUINT_TO_POINTER((guint)p_mac_lte_info->rnti), ueData);
}
/* Store this frame's details in table */
thisData = &(ueData->harqid[p_mac_lte_info->detailed_phy_info.ul_info.harq_id]);
thisData->inUse = TRUE;
thisData->length = tvb_length_remaining(tvb, offset);
tvb_memcpy(tvb, thisData->data, offset, MIN(thisData->length, MAX_EXPECTED_PDU_LENGTH));
thisData->ndi = p_mac_lte_info->detailed_phy_info.ul_info.ndi;
thisData->framenum = pinfo->fd->num;
thisData->received_time = pinfo->fd->abs_ts;
}
else {
/* Not first time, so just get whats already stored in result */
result = (ULHARQResult *)g_hash_table_lookup(mac_lte_ul_harq_result_hash, GUINT_TO_POINTER(pinfo->fd->num));
}
/* Show any link back to previous Tx */
if (retx_ti != NULL) {
if (result != NULL) {
if (result->previousSet) {
proto_item *original_ti, *gap_ti;
original_ti = proto_tree_add_uint(tree, hf_mac_lte_ul_harq_resend_original_frame,
tvb, 0, 0, result->previousFrameNum);
PROTO_ITEM_SET_GENERATED(original_ti);
gap_ti = proto_tree_add_uint(tree, hf_mac_lte_ul_harq_resend_time_since_previous_frame,
tvb, 0, 0, result->timeSincePreviousFrame);
PROTO_ITEM_SET_GENERATED(gap_ti);
}
}
else {
expert_add_info_format(pinfo, retx_ti, &ei_mac_lte_orig_tx_ul_frame_not_found,
"Original Tx of UL frame not found (UE %u) !!", p_mac_lte_info->ueid);
}
}
/* Show link forward to any known next Tx */
if ((result != NULL) && result->nextSet) {
proto_item *next_ti, *gap_ti;
next_ti = proto_tree_add_uint(tree, hf_mac_lte_ul_harq_resend_next_frame,
tvb, 0, 0, result->nextFrameNum);
expert_add_info_format(pinfo, next_ti, &ei_mac_lte_ul_harq_resend_next_frame,
"UL MAC PDU (UE %u) needed to be retransmitted", p_mac_lte_info->ueid);
PROTO_ITEM_SET_GENERATED(next_ti);
gap_ti = proto_tree_add_uint(tree, hf_mac_lte_ul_harq_resend_time_until_next_frame,
tvb, 0, 0, result->timeToNextFrame);
PROTO_ITEM_SET_GENERATED(gap_ti);
}
}
/* Look up SRResult associated with a given frame. Will create one if necessary
if can_create is set */
static SRResult *GetSRResult(guint32 frameNum, gboolean can_create)
{
SRResult *result;
result = (SRResult *)g_hash_table_lookup(mac_lte_sr_request_hash, GUINT_TO_POINTER(frameNum));
if ((result == NULL) && can_create) {
result = wmem_new0(wmem_file_scope(), SRResult);
g_hash_table_insert(mac_lte_sr_request_hash, GUINT_TO_POINTER((guint)frameNum), result);
}
return result;
}
/* Keep track of SR requests, failures and related grants, in order to show them
as generated fields in these frames */
static void TrackSRInfo(SREvent event, packet_info *pinfo, proto_tree *tree,
tvbuff_t *tvb, mac_lte_info *p_mac_lte_info, gint idx, proto_item *event_ti)
{
SRResult *result = NULL;
SRState *state;
SRResult *resultForSRFrame = NULL;
guint16 rnti;
guint16 ueid;
proto_item *ti;
/* Get appropriate identifiers */
if (event == SR_Request) {
rnti = p_mac_lte_info->oob_rnti[idx];
ueid = p_mac_lte_info->oob_ueid[idx];
}
else {
rnti = p_mac_lte_info->rnti;
ueid = p_mac_lte_info->ueid;
}
/* Create state for this RNTI if necessary */
state = (SRState *)g_hash_table_lookup(mac_lte_ue_sr_state, GUINT_TO_POINTER((guint)rnti));
if (state == NULL) {
/* Allocate status for this RNTI */
state = wmem_new(wmem_file_scope(), SRState);
state->status = None;
g_hash_table_insert(mac_lte_ue_sr_state, GUINT_TO_POINTER((guint)rnti), state);
}
/* First time through - update state with new info */
if (!pinfo->fd->flags.visited) {
guint32 timeSinceRequest;
/* Store time of request */
if (event == SR_Request) {
state->requestTime = pinfo->fd->abs_ts;
}
switch (state->status) {
case None:
switch (event) {
case SR_Grant:
/* Got another grant - fine */
/* update state */
state->lastGrantFramenum = pinfo->fd->num;
break;
case SR_Request:
/* Sent an SR - fine */
/* Update state */
state->status = SR_Outstanding;
state->lastSRFramenum = pinfo->fd->num;
break;
case SR_Failure:
/* This is an error, since we hadn't send an SR... */
result = GetSRResult(pinfo->fd->num, TRUE);
result->type = InvalidSREvent;
result->status = None;
result->event = SR_Failure;
break;
}
break;
case SR_Outstanding:
timeSinceRequest = (guint32)(((pinfo->fd->abs_ts.secs - state->requestTime.secs) * 1000) +
((pinfo->fd->abs_ts.nsecs - state->requestTime.nsecs) / 1000000));
switch (event) {
case SR_Grant:
/* Got grant we were waiting for, so state goes to None */
/* Update state */
state->status = None;
/* Set result info */
result = GetSRResult(pinfo->fd->num, TRUE);
result->type = GrantAnsweringSR;
result->frameNum = state->lastSRFramenum;
result->timeDifference = timeSinceRequest;
/* Also set forward link for SR */
resultForSRFrame = GetSRResult(state->lastSRFramenum, TRUE);
resultForSRFrame->type = SRLeadingToGrant;
resultForSRFrame->frameNum = pinfo->fd->num;
resultForSRFrame->timeDifference = timeSinceRequest;
break;
case SR_Request:
/* Another request when already have one pending */
result = GetSRResult(pinfo->fd->num, TRUE);
result->type = InvalidSREvent;
result->status = SR_Outstanding;
result->event = SR_Request;
break;
case SR_Failure:
/* We sent an SR but it failed */
/* Update state */
state->status = SR_Failed;
/* Set result info for failure frame */
result = GetSRResult(pinfo->fd->num, TRUE);
result->type = FailureAnsweringSR;
result->frameNum = state->lastSRFramenum;
result->timeDifference = timeSinceRequest;
/* Also set forward link for SR */
resultForSRFrame = GetSRResult(state->lastSRFramenum, TRUE);
resultForSRFrame->type = SRLeadingToFailure;
resultForSRFrame->frameNum = pinfo->fd->num;
resultForSRFrame->timeDifference = timeSinceRequest;
break;
}
break;
case SR_Failed:
switch (event) {
case SR_Grant:
/* Got a grant, presumably after a subsequent RACH - fine */
/* Update state */
state->status = None;
break;
case SR_Request:
/* Tried another SR after previous one failed.
Presumably a subsequent RACH was tried in-between... */
state->status = SR_Outstanding;
result = GetSRResult(pinfo->fd->num, TRUE);
result->status = SR_Outstanding;
result->event = SR_Request;
break;
case SR_Failure:
/* 2 failures in a row.... */
result = GetSRResult(pinfo->fd->num, TRUE);
result->type = InvalidSREvent;
result->status = SR_Failed;
result->event = SR_Failure;
break;
}
break;
}
}
/* Get stored result for this frame */
result = GetSRResult(pinfo->fd->num, FALSE);
if (result == NULL) {
/* For an SR frame, there should always be either a PDCCH grant or indication
that the SR has failed */
if (event == SR_Request) {
expert_add_info_format(pinfo, event_ti, &ei_mac_lte_sr_results_not_grant_or_failure_indication,
"UE %u: SR results in neither a grant nor a failure indication",
ueid);
}
return;
}
/* Show result info */
switch (result->type) {
case GrantAnsweringSR:
ti = proto_tree_add_uint(tree, hf_mac_lte_grant_answering_sr,
tvb, 0, 0, result->frameNum);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(tree, hf_mac_lte_sr_time_since_request,
tvb, 0, 0, result->timeDifference);
PROTO_ITEM_SET_GENERATED(ti);
break;
case FailureAnsweringSR:
ti = proto_tree_add_uint(tree, hf_mac_lte_failure_answering_sr,
tvb, 0, 0, result->frameNum);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(tree, hf_mac_lte_sr_time_since_request,
tvb, 0, 0, result->timeDifference);
PROTO_ITEM_SET_GENERATED(ti);
break;
case SRLeadingToGrant:
ti = proto_tree_add_uint(tree, hf_mac_lte_sr_leading_to_grant,
tvb, 0, 0, result->frameNum);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(tree, hf_mac_lte_sr_time_until_answer,
tvb, 0, 0, result->timeDifference);
PROTO_ITEM_SET_GENERATED(ti);
break;
case SRLeadingToFailure:
ti = proto_tree_add_uint(tree, hf_mac_lte_sr_leading_to_failure,
tvb, 0, 0, result->frameNum);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(tree, hf_mac_lte_sr_time_until_answer,
tvb, 0, 0, result->timeDifference);
PROTO_ITEM_SET_GENERATED(ti);
break;
case InvalidSREvent:
proto_tree_add_expert_format(tree, pinfo, &ei_mac_lte_sr_invalid_event,
tvb, 0, 0, "UE %u: Invalid SR event - state=%s, event=%s",
ueid,
val_to_str_const(result->status, sr_status_vals, "Unknown"),
val_to_str_const(result->event, sr_event_vals, "Unknown"));
break;
}
}
/********************************************************/
/* Count number of UEs/TTI (in both directions) */
/********************************************************/
/* For keeping track during first pass */
typedef struct tti_info_t {
guint16 subframe;
nstime_t ttiStartTime;
guint ues_in_tti;
} tti_info_t;
static tti_info_t UL_tti_info;
static tti_info_t DL_tti_info;
/* For associating with frame and displaying */
typedef struct TTIInfoResult_t {
guint ues_in_tti;
} TTIInfoResult_t;
/* This table stores (FrameNumber -> *TTIInfoResult_t). It is assigned during the first
pass and used thereafter */
static GHashTable *mac_lte_tti_info_result_hash = NULL;
/* Work out which UE this is within TTI (within direction). Return answer */
static guint16 count_ues_tti(mac_lte_info *p_mac_lte_info, packet_info *pinfo)
{
gboolean same_tti = FALSE;
tti_info_t *tti_info;
/* Just return any previous result */
TTIInfoResult_t *result = (TTIInfoResult_t *)g_hash_table_lookup(mac_lte_tti_info_result_hash, GUINT_TO_POINTER(pinfo->fd->num));
if (result != NULL) {
return result->ues_in_tti;
}
/* Set tti_info based upon direction */
if (p_mac_lte_info->direction == DIRECTION_UPLINK) {
tti_info = &UL_tti_info;
}
else {
tti_info = &DL_tti_info;
}
/* Work out if we are still in the same tti as before */
if (tti_info->subframe == p_mac_lte_info->subframeNumber) {
gint seconds_between_packets = (gint)
(pinfo->fd->abs_ts.secs - tti_info->ttiStartTime.secs);
gint nseconds_between_packets =
pinfo->fd->abs_ts.nsecs - tti_info->ttiStartTime.nsecs;
/* Round difference to nearest microsecond */
gint total_us_gap = (seconds_between_packets*1000000) +
((nseconds_between_packets+500) / 1000);
if (total_us_gap < 1000) {
same_tti = TRUE;
}
}
/* Update global state */
if (!same_tti) {
tti_info->subframe = p_mac_lte_info->subframeNumber;
tti_info->ttiStartTime = pinfo->fd->abs_ts;
tti_info->ues_in_tti = 1;
}
else {
tti_info->ues_in_tti++;
}
/* Set result state for this frame */
result = wmem_new(wmem_file_scope(), TTIInfoResult_t);
result->ues_in_tti = tti_info->ues_in_tti;
g_hash_table_insert(mac_lte_tti_info_result_hash,
GUINT_TO_POINTER(pinfo->fd->num), result);
return tti_info->ues_in_tti;
}
/* Show which UE this is (within direction) for this TTI */
static void show_ues_tti(packet_info *pinfo, mac_lte_info *p_mac_lte_info, tvbuff_t *tvb, proto_tree *context_tree)
{
/* Look up result */
TTIInfoResult_t *result = (TTIInfoResult_t *)g_hash_table_lookup(mac_lte_tti_info_result_hash, GUINT_TO_POINTER(pinfo->fd->num));
if (result != NULL) {
proto_item *ti = proto_tree_add_uint(context_tree,
(p_mac_lte_info->direction == DIRECTION_UPLINK) ?
hf_mac_lte_ues_ul_per_tti :
hf_mac_lte_ues_dl_per_tti,
tvb, 0, 0, result->ues_in_tti);
PROTO_ITEM_SET_GENERATED(ti);
}
}
/* Lookup channel details for lcid */
static void lookup_rlc_channel_from_lcid(guint16 ueid,
guint8 lcid,
rlc_channel_type_t *rlc_channel_type,
guint8 *UM_seqnum_length,
gint *drb_id)
{
/* Zero params (in case no match is found) */
*rlc_channel_type = rlcRaw;
*UM_seqnum_length = 0;
*drb_id = 0;
if (global_mac_lte_lcid_drb_source == (int)FromStaticTable) {
/* Look up in static (UAT) table */
guint m;
for (m=0; m < num_lcid_drb_mappings; m++) {
if (lcid == lcid_drb_mappings[m].lcid) {
*rlc_channel_type = lcid_drb_mappings[m].channel_type;
/* Set UM_seqnum_length */
switch (*rlc_channel_type) {
case rlcUM5:
*UM_seqnum_length = 5;
break;
case rlcUM10:
*UM_seqnum_length = 10;
break;
default:
break;
}
/* Set drb_id */
*drb_id = lcid_drb_mappings[m].drbid;
break;
}
}
}
else {
/* Look up the mappings for this UE */
ue_dynamic_drb_mappings_t *ue_mappings = (ue_dynamic_drb_mappings_t *)g_hash_table_lookup(mac_lte_ue_channels_hash, GUINT_TO_POINTER((guint)ueid));
if (!ue_mappings) {
return;
}
/* Look up setting gleaned from configuration protocol */
if (!ue_mappings->mapping[lcid].valid) {
return;
}
*rlc_channel_type = ue_mappings->mapping[lcid].channel_type;
/* Set UM_seqnum_length */
switch (*rlc_channel_type) {
case rlcUM5:
*UM_seqnum_length = 5;
break;
case rlcUM10:
*UM_seqnum_length = 10;
break;
default:
break;
}
/* Set drb_id */
*drb_id = ue_mappings->mapping[lcid].drbid;
}
}
#define MAX_HEADERS_IN_PDU 1024
/* UL-SCH and DL-SCH formats have much in common, so handle them in a common
function */
static void dissect_ulsch_or_dlsch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_item *pdu_ti,
volatile guint32 offset, guint8 direction,
mac_lte_info *p_mac_lte_info, mac_lte_tap_info *tap_info,
proto_item *retx_ti,
proto_tree *context_tree)
{
guint8 extension;
volatile guint16 n;
proto_item *truncated_ti;
proto_item *padding_length_ti;
proto_item *hidden_root_ti;
/* Keep track of LCIDs and lengths as we dissect the header */
volatile guint16 number_of_headers = 0;
guint8 lcids[MAX_HEADERS_IN_PDU];
gint16 pdu_lengths[MAX_HEADERS_IN_PDU];
proto_item *pdu_header_ti;
proto_tree *pdu_header_tree;
gboolean have_seen_data_header = FALSE;
guint8 number_of_padding_subheaders = 0;
gboolean have_seen_non_padding_control = FALSE;
gboolean have_seen_bsr = FALSE;
gboolean expecting_body_data = FALSE;
volatile guint32 is_truncated = FALSE;
/* Maintain/show UEs/TTI count */
tap_info->ueInTTI = count_ues_tti(p_mac_lte_info, pinfo);
show_ues_tti(pinfo, p_mac_lte_info, tvb, context_tree);
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"%s: (SF=%u) UEId=%-3u ",
(direction == DIRECTION_UPLINK) ? "UL-SCH" : "DL-SCH",
p_mac_lte_info->subframeNumber,
p_mac_lte_info->ueid);
tap_info->raw_length = p_mac_lte_info->length;
/******************************************************/
/* DRX information */
/* Update DRX state of UE */
if (global_mac_lte_show_drx) {
if (!pinfo->fd->flags.visited) {
/* Update UE state to this subframe (but before this event is processed) */
update_drx_info(pinfo, p_mac_lte_info);
/* Store 'before' snapshot of UE state for this frame */
set_drx_info(pinfo, p_mac_lte_info, TRUE);
}
/* Show current DRX state in tree as 'before' */
show_drx_info(pinfo, tree, tvb, p_mac_lte_info, TRUE);
/* Changes of state caused by events */
if (!pinfo->fd->flags.visited) {
if ((p_mac_lte_info->reTxCount == 0) && (p_mac_lte_info->direction == DIRECTION_UPLINK)) {
mac_lte_drx_new_ulsch_data(p_mac_lte_info->ueid);
}
else {
/* Downlink */
if (p_mac_lte_info->crcStatusValid != crc_success) {
mac_lte_drx_dl_crc_error(p_mac_lte_info->ueid);
}
else if (p_mac_lte_info->reTxCount == 0) {
mac_lte_drx_new_dlsch_data(p_mac_lte_info->ueid);
}
}
}
}
/* For uplink frames, if this is logged as a resend, look for original tx */
if (direction == DIRECTION_UPLINK) {
TrackReportedULHARQResend(pinfo, tvb, offset, tree, p_mac_lte_info, retx_ti);
}
/* For uplink grants, update SR status. N.B. only newTx grant should stop SR */
if ((direction == DIRECTION_UPLINK) && (p_mac_lte_info->reTxCount == 0) &&
global_mac_lte_track_sr) {
TrackSRInfo(SR_Grant, pinfo, tree, tvb, p_mac_lte_info, 0, NULL);
}
/* Add hidden item to filter on */
hidden_root_ti = proto_tree_add_string_format(tree,
(direction == DIRECTION_UPLINK) ?
hf_mac_lte_ulsch :
hf_mac_lte_dlsch,
tvb, offset, 0,
"",
"Hidden header");
PROTO_ITEM_SET_HIDDEN(hidden_root_ti);
/* Add PDU block header subtree */
pdu_header_ti = proto_tree_add_string_format(tree,
(direction == DIRECTION_UPLINK) ?
hf_mac_lte_ulsch_header :
hf_mac_lte_dlsch_header,
tvb, offset, 0,
"",
"MAC PDU Header");
pdu_header_tree = proto_item_add_subtree(pdu_header_ti,
(direction == DIRECTION_UPLINK) ?
ett_mac_lte_ulsch_header :
ett_mac_lte_dlsch_header);
/************************************************************************/
/* Dissect each sub-header. */
do {
guint8 reserved;
guint64 length = 0;
proto_item *pdu_subheader_ti;
proto_tree *pdu_subheader_tree;
proto_item *lcid_ti;
proto_item *ti;
gint offset_start_subheader = offset;
guint8 first_byte = tvb_get_guint8(tvb, offset);
/* Add PDU block header subtree.
Default with length of 1 byte. */
pdu_subheader_ti = proto_tree_add_string_format(pdu_header_tree,
hf_mac_lte_sch_subheader,
tvb, offset, 1,
"",
"Sub-header");
pdu_subheader_tree = proto_item_add_subtree(pdu_subheader_ti,
ett_mac_lte_sch_subheader);
/* Check 1st 2 reserved bits */
reserved = (first_byte & 0xc0) >> 6;
ti = proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_sch_reserved,
tvb, offset, 1, ENC_BIG_ENDIAN);
if (reserved != 0) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero,
"%cL-SCH header Reserved bits not zero",
(p_mac_lte_info->direction == DIRECTION_UPLINK) ? 'U' : 'D');
}
/* Extended bit */
extension = (first_byte & 0x20) >> 5;
proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_sch_extended,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* LCID. Has different meaning depending upon direction. */
lcids[number_of_headers] = first_byte & 0x1f;
if (direction == DIRECTION_UPLINK) {
lcid_ti = proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_ulsch_lcid,
tvb, offset, 1, ENC_BIG_ENDIAN);
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"(%s",
val_to_str_const(lcids[number_of_headers],
ulsch_lcid_vals, "(Unknown LCID)"));
}
else {
/* Downlink */
lcid_ti = proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_dlsch_lcid,
tvb, offset, 1, ENC_BIG_ENDIAN);
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"(%s",
val_to_str_const(lcids[number_of_headers],
dlsch_lcid_vals, "(Unknown LCID)"));
if (lcids[number_of_headers] == DRX_COMMAND_LCID) {
expert_add_info_format(pinfo, lcid_ti, &ei_mac_lte_dlsch_lcid,
"DRX command received for UE %u (RNTI %u)",
p_mac_lte_info->ueid, p_mac_lte_info->rnti);
}
}
offset++;
/* Remember if we've seen a data subheader */
if (lcids[number_of_headers] <= 10) {
have_seen_data_header = TRUE;
expecting_body_data = TRUE;
}
/* Show an expert item if a contol subheader (except Padding) appears
*after* a data PDU */
if (have_seen_data_header &&
(lcids[number_of_headers] > 10) && (lcids[number_of_headers] != PADDING_LCID)) {
expert_add_info_format(pinfo, lcid_ti, &ei_mac_lte_control_subheader_after_data_subheader,
"%cL-SCH Control subheaders should not appear after data subheaders",
(p_mac_lte_info->direction == DIRECTION_UPLINK) ? 'U' : 'D');
return;
}
/* Show an expert item if we're seeing more then one BSR in a frame */
if ((direction == DIRECTION_UPLINK) && is_bsr_lcid(lcids[number_of_headers])) {
if (have_seen_bsr) {
expert_add_info(pinfo, lcid_ti, &ei_mac_lte_control_bsr_multiple);
return;
}
have_seen_bsr = TRUE;
}
/* Should not see padding after non-padding control... */
if ((lcids[number_of_headers] > 10) &&
(lcids[number_of_headers] == PADDING_LCID) &&
extension)
{
number_of_padding_subheaders++;
if (number_of_padding_subheaders > 2) {
expert_add_info(pinfo, lcid_ti, &ei_mac_lte_padding_data_multiple);
}
if (have_seen_non_padding_control) {
expert_add_info(pinfo, lcid_ti, &ei_mac_lte_padding_data_before_control_subheader);
}
}
/* Also flag if we have final padding but also padding subheaders
at the start! */
if (!extension && (lcids[number_of_headers] == PADDING_LCID) &&
(number_of_padding_subheaders > 0)) {
expert_add_info(pinfo, lcid_ti, &ei_mac_lte_padding_data_start_and_end);
}
/* Remember that we've seen non-padding control */
if ((lcids[number_of_headers] > 10) &&
(lcids[number_of_headers] != PADDING_LCID)) {
have_seen_non_padding_control = TRUE;
}
/********************************************************************/
/* Length field follows if not the last header or for a fixed-sized
control element */
if (!extension) {
/* Last one... */
if (is_fixed_sized_control_element(lcids[number_of_headers], direction)) {
pdu_lengths[number_of_headers] = 0;
}
else {
pdu_lengths[number_of_headers] = -1;
}
}
else {
/* Not the last one */
if (!is_fixed_sized_control_element(lcids[number_of_headers], direction) &&
(lcids[number_of_headers] != PADDING_LCID)) {
guint8 format;
/* F(ormat) bit tells us how long the length field is */
format = (tvb_get_guint8(tvb, offset) & 0x80) >> 7;
proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_sch_format,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* Now read length field itself */
if (format) {
/* >= 128 - use 15 bits */
proto_tree_add_bits_ret_val(pdu_subheader_tree, hf_mac_lte_sch_length,
tvb, offset*8 + 1, 15, &length, ENC_BIG_ENDIAN);
offset += 2;
}
else {
/* Less than 128 - only 7 bits */
proto_tree_add_bits_ret_val(pdu_subheader_tree, hf_mac_lte_sch_length,
tvb, offset*8 + 1, 7, &length, ENC_BIG_ENDIAN);
offset++;
}
pdu_lengths[number_of_headers] = (gint16)length;
}
else {
pdu_lengths[number_of_headers] = 0;
}
}
/* Close off description in info column */
switch (pdu_lengths[number_of_headers]) {
case 0:
write_pdu_label_and_info_literal(pdu_ti, NULL, pinfo, ") ");
break;
case -1:
write_pdu_label_and_info_literal(pdu_ti, NULL, pinfo, ":remainder) ");
break;
default:
write_pdu_label_and_info(pdu_ti, NULL, pinfo, ":%u bytes) ",
pdu_lengths[number_of_headers]);
break;
}
/* Append summary to subheader root */
proto_item_append_text(pdu_subheader_ti, " (lcid=%s",
val_to_str_const(lcids[number_of_headers],
(direction == DIRECTION_UPLINK) ?
ulsch_lcid_vals :
dlsch_lcid_vals,
"Unknown"));
switch (pdu_lengths[number_of_headers]) {
case -1:
proto_item_append_text(pdu_subheader_ti, ", length is remainder)");
proto_item_append_text(pdu_header_ti, " (%s:remainder)",
val_to_str_const(lcids[number_of_headers],
(direction == DIRECTION_UPLINK) ? ulsch_lcid_vals : dlsch_lcid_vals,
"Unknown"));
break;
case 0:
proto_item_append_text(pdu_subheader_ti, ")");
proto_item_append_text(pdu_header_ti, " (%s)",
val_to_str_const(lcids[number_of_headers],
(direction == DIRECTION_UPLINK) ? ulsch_lcid_vals : dlsch_lcid_vals,
"Unknown"));
break;
default:
proto_item_append_text(pdu_subheader_ti, ", length=%u)",
pdu_lengths[number_of_headers]);
proto_item_append_text(pdu_header_ti, " (%s:%u)",
val_to_str_const(lcids[number_of_headers],
(direction == DIRECTION_UPLINK) ? ulsch_lcid_vals : dlsch_lcid_vals,
"Unknown"),
pdu_lengths[number_of_headers]);
break;
}
/* Flag unknown lcid values in expert info */
if (try_val_to_str(lcids[number_of_headers],
(direction == DIRECTION_UPLINK) ? ulsch_lcid_vals : dlsch_lcid_vals) == NULL) {
expert_add_info_format(pinfo, pdu_subheader_ti, &ei_mac_lte_lcid_unexpected,
"%cL-SCH: Unexpected LCID received (%u)",
(p_mac_lte_info->direction == DIRECTION_UPLINK) ? 'U' : 'D',
lcids[number_of_headers]);
}
/* Set length of this subheader */
proto_item_set_len(pdu_subheader_ti, offset - offset_start_subheader);
number_of_headers++;
} while ((number_of_headers < MAX_HEADERS_IN_PDU) && extension);
/* Check that we didn't reach the end of the subheader array... */
if (number_of_headers >= MAX_HEADERS_IN_PDU) {
proto_tree_add_expert_format(tree, pinfo, &ei_mac_lte_too_many_subheaders, tvb, offset, 1,
"Reached %u subheaders - frame obviously malformed",
MAX_HEADERS_IN_PDU);
return;
}
/* Append summary to overall PDU header root */
proto_item_append_text(pdu_header_ti, " [%u subheaders]",
number_of_headers);
/* And set its length to offset */
proto_item_set_len(pdu_header_ti, offset);
/* For DL, see if this is a retx. Use whole PDU present (i.e. ignore padding if not logged) */
if (direction == DIRECTION_DOWNLINK) {
/* Result will be added to context tree */
TrackReportedDLHARQResend(pinfo, tvb, tvb_length_remaining(tvb, 0), context_tree, p_mac_lte_info);
tap_info->isPHYRetx = (p_mac_lte_info->dl_retx == dl_retx_yes);
}
/************************************************************************/
/* Dissect SDUs / control elements / padding. */
/************************************************************************/
/* Dissect control element bodies first */
for (n=0; n < number_of_headers; n++) {
/* Get out of loop once see any data SDU subheaders */
if (lcids[n] <= 10) {
/* Update tap sdu count for this channel */
tap_info->sdus_for_lcid[lcids[n]]++;
break;
}
/* Process what should be a valid control PDU type */
if (direction == DIRECTION_DOWNLINK) {
/****************************/
/* DL-SCH Control PDUs */
switch (lcids[n]) {
case ACTIVATION_DEACTIVATION_LCID:
{
proto_item *ad_ti;
proto_tree *ad_tree;
proto_item *ti;
guint8 reserved;
/* Create AD root */
ad_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_activation_deactivation,
tvb, offset, 1,
"",
"Activation/Deactivation");
ad_tree = proto_item_add_subtree(ad_ti, ett_mac_lte_activation_deactivation);
proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_c7,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_c6,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_c5,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_c4,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_c3,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_c2,
tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_c1,
tvb, offset, 1, ENC_BIG_ENDIAN);
ti = proto_tree_add_item(ad_tree, hf_mac_lte_control_activation_deactivation_reserved,
tvb, offset, 1, ENC_BIG_ENDIAN);
reserved = tvb_get_guint8(tvb, offset) & 0x01;
if (reserved != 0) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero,
"Activation/Deactivation Reserved bit not zero");
}
offset++;
}
break;
case UE_CONTENTION_RESOLUTION_IDENTITY_LCID:
{
proto_item *cr_ti;
proto_tree *cr_tree;
proto_item *ti;
ContentionResolutionResult *crResult;
/* Create CR root */
cr_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_ue_contention_resolution,
tvb, offset, 6,
"",
"Contention Resolution");
cr_tree = proto_item_add_subtree(cr_ti, ett_mac_lte_contention_resolution);
/* Contention resolution body */
proto_tree_add_item(cr_tree, hf_mac_lte_control_ue_contention_resolution_identity,
tvb, offset, 6, ENC_NA);
if (global_mac_lte_decode_cr_body) {
tvbuff_t *cr_body_tvb = tvb_new_subset(tvb, offset, 6, 6);
dissector_handle_t ul_ccch_handle = find_dissector("lte_rrc.ul_ccch");
if (ul_ccch_handle != 0) {
call_with_catch_all(ul_ccch_handle, cr_body_tvb, pinfo, cr_tree);
}
}
/* Get pointer to result struct for this frame */
crResult = (ContentionResolutionResult *)g_hash_table_lookup(mac_lte_cr_result_hash, GUINT_TO_POINTER(pinfo->fd->num));
if (crResult == NULL) {
/* Need to set result by looking for and comparing with Msg3 */
Msg3Data *msg3Data;
guint msg3Key = p_mac_lte_info->rnti;
/* Allocate result and add it to the table */
crResult = wmem_new(wmem_file_scope(), ContentionResolutionResult);
g_hash_table_insert(mac_lte_cr_result_hash, GUINT_TO_POINTER(pinfo->fd->num), crResult);
/* Look for Msg3 */
msg3Data = (Msg3Data *)g_hash_table_lookup(mac_lte_msg3_hash, GUINT_TO_POINTER(msg3Key));
/* Compare CCCH bytes */
if (msg3Data != NULL) {
crResult->msSinceMsg3 = (guint32)(((pinfo->fd->abs_ts.secs - msg3Data->msg3Time.secs) * 1000) +
((pinfo->fd->abs_ts.nsecs - msg3Data->msg3Time.nsecs) / 1000000));
crResult->msg3FrameNum = msg3Data->framenum;
/* Compare the 6 bytes */
if (tvb_memeql(tvb, offset, msg3Data->data, 6) == 0) {
crResult->status = Msg3Match;
}
else {
crResult->status = Msg3NoMatch;
}
}
else {
crResult->status = NoMsg3;
}
}
/* Now show CR result in tree */
switch (crResult->status) {
case NoMsg3:
proto_item_append_text(cr_ti, " (no corresponding Msg3 found!)");
break;
case Msg3Match:
ti = proto_tree_add_uint(cr_tree, hf_mac_lte_control_ue_contention_resolution_msg3,
tvb, 0, 0, crResult->msg3FrameNum);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(cr_tree, hf_mac_lte_control_ue_contention_resolution_time_since_msg3,
tvb, 0, 0, crResult->msSinceMsg3);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_boolean(cr_tree, hf_mac_lte_control_ue_contention_resolution_msg3_matched,
tvb, 0, 0, TRUE);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(cr_ti, " (matches Msg3 from frame %u, %ums ago)",
crResult->msg3FrameNum, crResult->msSinceMsg3);
break;
case Msg3NoMatch:
ti = proto_tree_add_uint(cr_tree, hf_mac_lte_control_ue_contention_resolution_msg3,
tvb, 0, 0, crResult->msg3FrameNum);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(cr_tree, hf_mac_lte_control_ue_contention_resolution_time_since_msg3,
tvb, 0, 0, crResult->msSinceMsg3);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_boolean(cr_tree, hf_mac_lte_control_ue_contention_resolution_msg3_matched,
tvb, 0, 0, FALSE);
expert_add_info_format(pinfo, ti, &ei_mac_lte_control_ue_contention_resolution_msg3_matched,
"CR body in Msg4 doesn't match Msg3 CCCH in frame %u",
crResult->msg3FrameNum);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(cr_ti, " (doesn't match Msg3 from frame %u, %u ago)",
crResult->msg3FrameNum, crResult->msSinceMsg3);
break;
};
offset += 6;
}
break;
case TIMING_ADVANCE_LCID:
{
proto_item *ta_ti;
proto_item *ta_value_ti;
proto_tree *ta_tree;
guint8 ta_value;
/* Create TA root */
ta_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_timing_advance,
tvb, offset, 1,
"",
"Timing Advance");
ta_tree = proto_item_add_subtree(ta_ti, ett_mac_lte_timing_advance);
/* TAG Id */
proto_tree_add_item(ta_tree, hf_mac_lte_control_timing_advance_group_id,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* TA value */
ta_value = tvb_get_guint8(tvb, offset) & 0x3f;
ta_value_ti = proto_tree_add_item(ta_tree, hf_mac_lte_control_timing_advance_command,
tvb, offset, 1, ENC_BIG_ENDIAN);
if (ta_value == 31) {
expert_add_info(pinfo, ta_value_ti, &ei_mac_lte_control_timing_advance_command_no_correction);
}
else {
expert_add_info_format(pinfo, ta_value_ti, &ei_mac_lte_control_timing_advance_command_correction_needed,
"Timing Advance control element received (%u) %s correction needed",
ta_value,
(ta_value < 31) ? "-ve" : "+ve");
}
offset++;
}
break;
case DRX_COMMAND_LCID:
/* No payload */
mac_lte_drx_control_element_received(p_mac_lte_info->ueid);
break;
case PADDING_LCID:
/* No payload (in this position) */
tap_info->padding_bytes++;
break;
default:
break;
}
}
else {
/**********************************/
/* UL-SCH Control PDUs */
switch (lcids[n]) {
case EXTENDED_POWER_HEADROOM_REPORT_LCID:
{
proto_item *ephr_ti;
proto_tree *ephr_tree;
proto_item *ti;
proto_tree *ephr_cell_tree;
proto_item *ephr_cell_ti;
guint8 scell_bitmap;
guint8 scell_count;
guint8 byte;
guint i;
guint32 curr_offset = offset;
guint32 computed_header_offset;
if (pdu_lengths[n] == -1) {
/* Control Element size is the remaining PDU */
pdu_lengths[n] = (gint16)tvb_length_remaining(tvb, curr_offset);
}
/* Create EPHR root */
ephr_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_ext_power_headroom,
tvb, curr_offset, pdu_lengths[n],
"",
"Extended Power Headroom");
ephr_tree = proto_item_add_subtree(ephr_ti, ett_mac_lte_extended_power_headroom);
scell_bitmap = tvb_get_guint8(tvb, curr_offset);
proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_c7,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_c6,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_c5,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_c4,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_c3,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_c2,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_c1,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
/* Check Reserved bit */
ti = proto_tree_add_item(ephr_tree, hf_mac_lte_control_ext_power_headroom_reserved,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
if (scell_bitmap & 0x01) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero,
"Extended Power Headroom Reserved bit not zero");
}
curr_offset++;
/* Compute expected header size to deduce if PH Type 2 report is present or not */
/* First count the number of SCells */
for (i = 0, scell_count = 0; i < 7; i++) {
if (scell_bitmap & (0x80>>i)) {
scell_count++;
}
}
/* Now quickly parse the header */
computed_header_offset = curr_offset;
for (i = 0; i < scell_count; i++) {
if (tvb_get_guint8(tvb, computed_header_offset) & 0x80) {
computed_header_offset++;
}
computed_header_offset++;
}
if ((gint16)(computed_header_offset + 1 - curr_offset) != pdu_lengths[n]) {
/* PH Type 2 is present */
if (tvb_get_guint8(tvb, computed_header_offset) & 0x80) {
computed_header_offset++;
}
computed_header_offset++;
if ((gint16)(computed_header_offset + 1 - curr_offset) != pdu_lengths[n]) {
expert_add_info_format(pinfo, ephr_ti, &ei_mac_lte_control_element_size_invalid,
"Control Element has an unexpected size (computed=%d, actual=%d)",
computed_header_offset + 1 - curr_offset, pdu_lengths[n]);
offset += pdu_lengths[n];
break;
}
byte = tvb_get_guint8(tvb, curr_offset);
ephr_cell_ti = proto_tree_add_text(ephr_tree, tvb, curr_offset, ((byte&0x80)?2:1), "PCell");
ephr_cell_tree = proto_item_add_subtree(ephr_cell_ti, ett_mac_lte_extended_power_headroom_cell);
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_power_backoff,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_value,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_level,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_item_append_text(ephr_cell_ti, " (%s)",
val_to_str_ext_const((byte&0x3f), &power_headroom_vals_ext, "Unknown"));
curr_offset++;
if (byte & 0x80) {
/* Pcmax,c field is present */
byte = tvb_get_guint8(tvb, curr_offset);
/* Check 2 Reserved bits */
ti = proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_reserved2,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
if (byte & 0xc0) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero,
"Extended Power Headroom Reserved bits not zero (found 0x%x)",
(byte & 0xc0) >> 6);
}
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_pcmaxc,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_item_append_text(ephr_cell_ti, " (%s)",
val_to_str_ext_const((byte&0x3f), &pcmaxc_vals_ext, "Unknown"));
curr_offset++;
}
} else {
if ((gint16)(computed_header_offset + 1 - curr_offset) != pdu_lengths[n]) {
expert_add_info_format(pinfo, ephr_ti, &ei_mac_lte_control_element_size_invalid,
"Control Element has an unexpected size (computed=%d, actual=%d)",
computed_header_offset + 1 - curr_offset, pdu_lengths[n]);
offset += pdu_lengths[n];
break;
}
}
for (i = 1, scell_bitmap>>=1; i <= 7; i++, scell_bitmap>>=1) {
if (scell_bitmap & 0x01) {
byte = tvb_get_guint8(tvb, curr_offset);
ephr_cell_ti = proto_tree_add_text(ephr_tree, tvb, curr_offset, ((byte&0x80)?2:1), "SCell Index %u", i);
ephr_cell_tree = proto_item_add_subtree(ephr_cell_ti, ett_mac_lte_extended_power_headroom_cell);
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_power_backoff,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_value,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_level,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_item_append_text(ephr_cell_ti, " (%s)",
val_to_str_ext_const((byte&0x3f), &power_headroom_vals_ext, "Unknown"));
curr_offset++;
if (byte & 0x80) {
/* Pcmax,c field is present */
byte = tvb_get_guint8(tvb, curr_offset);
/* Check 2 Reserved bits */
ti = proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_reserved2,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
if (byte & 0xc0) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero,
"Extended Power Headroom Reserved bits not zero (found 0x%x)",
(byte & 0xc0) >> 6);
}
proto_tree_add_item(ephr_cell_tree, hf_mac_lte_control_ext_power_headroom_pcmaxc,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
proto_item_append_text(ephr_cell_ti, " (%s)",
val_to_str_ext_const((byte&0x3f), &pcmaxc_vals_ext, "Unknown"));
curr_offset++;
}
}
}
offset += pdu_lengths[n];
}
break;
case POWER_HEADROOM_REPORT_LCID:
{
proto_item *phr_ti;
proto_tree *phr_tree;
proto_item *ti;
guint8 reserved;
guint8 level;
/* Create PHR root */
phr_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_power_headroom,
tvb, offset, 1,
"",
"Power Headroom");
phr_tree = proto_item_add_subtree(phr_ti, ett_mac_lte_power_headroom);
/* Check 2 Reserved bits */
reserved = (tvb_get_guint8(tvb, offset) & 0xc0) >> 6;
ti = proto_tree_add_item(phr_tree, hf_mac_lte_control_power_headroom_reserved,
tvb, offset, 1, ENC_BIG_ENDIAN);
if (reserved != 0) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero,
"Power Headroom Reserved bits not zero (found 0x%x)", reserved);
}
/* Level */
level = tvb_get_guint8(tvb, offset) & 0x3f;
proto_tree_add_item(phr_tree, hf_mac_lte_control_power_headroom_level,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* Show value in root label */
proto_item_append_text(phr_ti, " (%s)",
val_to_str_ext_const(level, &power_headroom_vals_ext, "Unknown"));
offset++;
}
break;
case CRNTI_LCID:
proto_tree_add_item(tree, hf_mac_lte_control_crnti,
tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
break;
case TRUNCATED_BSR_LCID:
case SHORT_BSR_LCID:
{
proto_tree *bsr_tree;
proto_item *bsr_ti;
proto_item *buffer_size_ti;
guint8 lcgid;
guint8 buffer_size;
int hfindex;
value_string_ext *p_vs_ext;
if (p_mac_lte_info->isExtendedBSRSizes) {
hfindex = hf_mac_lte_control_short_ext_bsr_buffer_size;
p_vs_ext = &ext_buffer_size_vals_ext;
} else {
hfindex = hf_mac_lte_control_short_bsr_buffer_size;
p_vs_ext = &buffer_size_vals_ext;
}
bsr_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_bsr,
tvb, offset, 1,
"",
"Short BSR");
bsr_tree = proto_item_add_subtree(bsr_ti, ett_mac_lte_bsr);
/* LCG ID */
lcgid = (tvb_get_guint8(tvb, offset) & 0xc0) >> 6;
proto_tree_add_item(bsr_tree, hf_mac_lte_control_bsr_lcg_id,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* Buffer Size */
buffer_size = tvb_get_guint8(tvb, offset) & 0x3f;
buffer_size_ti = proto_tree_add_item(bsr_tree, hfindex,
tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
if (buffer_size >= global_mac_lte_bsr_warn_threshold) {
expert_add_info_format(pinfo, buffer_size_ti, &ei_mac_lte_bsr_warn_threshold_exceeded,
"UE %u - BSR for LCG %u exceeds threshold: %u (%s)",
p_mac_lte_info->ueid,
lcgid,
buffer_size,
val_to_str_ext_const(buffer_size, p_vs_ext, "Unknown"));
}
proto_item_append_text(bsr_ti, " (lcgid=%u %s)",
lcgid,
val_to_str_ext_const(buffer_size, &buffer_size_vals_ext, "Unknown"));
}
break;
case LONG_BSR_LCID:
{
proto_tree *bsr_tree;
proto_item *bsr_ti;
proto_item *buffer_size_ti;
guint8 buffer_size[4];
int hfindex[4];
value_string_ext *p_vs_ext;
if (p_mac_lte_info->isExtendedBSRSizes) {
hfindex[0] = hf_mac_lte_control_long_ext_bsr_buffer_size_0;
hfindex[1] = hf_mac_lte_control_long_ext_bsr_buffer_size_1;
hfindex[2] = hf_mac_lte_control_long_ext_bsr_buffer_size_2;
hfindex[3] = hf_mac_lte_control_long_ext_bsr_buffer_size_3;
p_vs_ext = &ext_buffer_size_vals_ext;
} else {
hfindex[0] = hf_mac_lte_control_long_bsr_buffer_size_0;
hfindex[1] = hf_mac_lte_control_long_bsr_buffer_size_1;
hfindex[2] = hf_mac_lte_control_long_bsr_buffer_size_2;
hfindex[3] = hf_mac_lte_control_long_bsr_buffer_size_3;
p_vs_ext = &buffer_size_vals_ext;
}
bsr_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_bsr,
tvb, offset, 3,
"",
"Long BSR");
bsr_tree = proto_item_add_subtree(bsr_ti, ett_mac_lte_bsr);
/* LCID Group 0 */
buffer_size_ti = proto_tree_add_item(bsr_tree, hfindex[0],
tvb, offset, 1, ENC_BIG_ENDIAN);
buffer_size[0] = (tvb_get_guint8(tvb, offset) & 0xfc) >> 2;
if (buffer_size[0] >= global_mac_lte_bsr_warn_threshold) {
expert_add_info_format(pinfo, buffer_size_ti, &ei_mac_lte_bsr_warn_threshold_exceeded,
"UE %u - BSR for LCG 0 exceeds threshold: %u (%s)",
p_mac_lte_info->ueid,
buffer_size[0],
val_to_str_ext_const(buffer_size[0], p_vs_ext, "Unknown"));
}
/* LCID Group 1 */
buffer_size_ti = proto_tree_add_item(bsr_tree, hfindex[1],
tvb, offset, 2, ENC_BIG_ENDIAN);
buffer_size[1] = ((tvb_get_guint8(tvb, offset) & 0x03) << 4) | ((tvb_get_guint8(tvb, offset+1) & 0xf0) >> 4);
offset++;
if (buffer_size[1] >= global_mac_lte_bsr_warn_threshold) {
expert_add_info_format(pinfo, buffer_size_ti, &ei_mac_lte_bsr_warn_threshold_exceeded,
"UE %u - BSR for LCG 1 exceeds threshold: %u (%s)",
p_mac_lte_info->ueid,
buffer_size[1],
val_to_str_ext_const(buffer_size[1], p_vs_ext, "Unknown"));
}
/* LCID Group 2 */
buffer_size_ti = proto_tree_add_item(bsr_tree, hfindex[2],
tvb, offset, 2, ENC_BIG_ENDIAN);
buffer_size[2] = ((tvb_get_guint8(tvb, offset) & 0x0f) << 2) | ((tvb_get_guint8(tvb, offset+1) & 0xc0) >> 6);
offset++;
if (buffer_size[2] >= global_mac_lte_bsr_warn_threshold) {
expert_add_info_format(pinfo, buffer_size_ti, &ei_mac_lte_bsr_warn_threshold_exceeded,
"UE %u - BSR for LCG 2 exceeds threshold: %u (%s)",
p_mac_lte_info->ueid,
buffer_size[2],
val_to_str_ext_const(buffer_size[2], p_vs_ext, "Unknown"));
}
/* LCID Group 3 */
buffer_size_ti = proto_tree_add_item(bsr_tree, hfindex[3],
tvb, offset, 1, ENC_BIG_ENDIAN);
buffer_size[3] = tvb_get_guint8(tvb, offset) & 0x3f;
offset++;
if (buffer_size[3] >= global_mac_lte_bsr_warn_threshold) {
expert_add_info_format(pinfo, buffer_size_ti, &ei_mac_lte_bsr_warn_threshold_exceeded,
"UE %u - BSR for LCG 3 exceeds threshold: %u (%s)",
p_mac_lte_info->ueid,
buffer_size[3],
val_to_str_ext_const(buffer_size[3], p_vs_ext, "Unknown"));
}
/* Append summary to parent */
proto_item_append_text(bsr_ti, " 0:(%s) 1:(%s) 2:(%s) 3:(%s)",
val_to_str_ext_const(buffer_size[0], p_vs_ext, "Unknown"),
val_to_str_ext_const(buffer_size[1], p_vs_ext, "Unknown"),
val_to_str_ext_const(buffer_size[2], p_vs_ext, "Unknown"),
val_to_str_ext_const(buffer_size[3], p_vs_ext, "Unknown"));
}
break;
case PADDING_LCID:
/* No payload, in this position */
tap_info->padding_bytes++;
break;
default:
break;
}
}
}
/* There might not be any data, if only headers (plus control data) were logged */
is_truncated = ((tvb_length_remaining(tvb, offset) == 0) && expecting_body_data);
truncated_ti = proto_tree_add_uint(tree, hf_mac_lte_sch_header_only, tvb, 0, 0,
is_truncated);
if (is_truncated) {
PROTO_ITEM_SET_GENERATED(truncated_ti);
expert_add_info(pinfo, truncated_ti, &ei_mac_lte_sch_header_only);
return;
}
else {
PROTO_ITEM_SET_HIDDEN(truncated_ti);
}
/* Now process remaining bodies, which should all be data */
for (; n < number_of_headers; n++) {
/* Data SDUs treated identically for Uplink or downlink channels */
proto_item *sdu_ti;
const guint8 *pdu_data;
volatile guint16 data_length;
int i;
char buff[64];
gboolean rlc_called_for_sdu = FALSE;
/* Break out if meet padding */
if (lcids[n] == PADDING_LCID) {
break;
}
/* Work out length */
data_length = (pdu_lengths[n] == -1) ?
tvb_length_remaining(tvb, offset) :
pdu_lengths[n];
/* Dissect SDU as raw bytes */
sdu_ti = proto_tree_add_bytes_format(tree, hf_mac_lte_sch_sdu, tvb, offset, pdu_lengths[n],
NULL, "SDU (%s, length=%u bytes): ",
val_to_str_const(lcids[n],
(direction == DIRECTION_UPLINK) ?
ulsch_lcid_vals :
dlsch_lcid_vals,
"Unknown"),
data_length);
/* Look for Msg3 data so that it may be compared with later
Contention Resolution body */
if ((lcids[n] == 0) && (direction == DIRECTION_UPLINK) && (data_length == 6)) {
if (!pinfo->fd->flags.visited) {
guint key = p_mac_lte_info->rnti;
Msg3Data *data = (Msg3Data *)g_hash_table_lookup(mac_lte_msg3_hash, GUINT_TO_POINTER(key));
/* Look for previous entry for this UE */
if (data == NULL) {
/* Allocate space for data and add to table */
data = wmem_new(wmem_file_scope(), Msg3Data);
g_hash_table_insert(mac_lte_msg3_hash, GUINT_TO_POINTER(key), data);
}
/* Fill in data details */
data->framenum = pinfo->fd->num;
tvb_memcpy(tvb, data->data, offset, data_length);
data->msg3Time = pinfo->fd->abs_ts;
}
}
/* CCCH frames can be dissected directly by LTE RRC... */
if ((lcids[n] == 0) && global_mac_lte_attempt_rrc_decode) {
tvbuff_t *rrc_tvb = tvb_new_subset(tvb, offset, data_length, data_length);
/* Get appropriate dissector handle */
volatile dissector_handle_t protocol_handle = 0;
if (p_mac_lte_info->direction == DIRECTION_UPLINK) {
protocol_handle = find_dissector("lte_rrc.ul_ccch");
}
else {
protocol_handle = find_dissector("lte_rrc.dl_ccch");
}
/* Hide raw view of bytes */
PROTO_ITEM_SET_HIDDEN(sdu_ti);
rlc_called_for_sdu = TRUE;
call_with_catch_all(protocol_handle, rrc_tvb, pinfo, tree);
}
/* LCID 1 and 2 can be assumed to be srb1&2, so can dissect as RLC AM */
else if ((lcids[n] == 1) || (lcids[n] == 2)) {
if (global_mac_lte_attempt_srb_decode) {
/* Call RLC dissector */
call_rlc_dissector(tvb, pinfo, tree, pdu_ti, offset, data_length,
RLC_AM_MODE, direction, p_mac_lte_info->ueid,
CHANNEL_TYPE_SRB, lcids[n], 0,
get_mac_lte_channel_priority(p_mac_lte_info->ueid,
lcids[n], direction));
/* Hide raw view of bytes */
PROTO_ITEM_SET_HIDDEN(sdu_ti);
rlc_called_for_sdu = TRUE;
}
}
else if ((lcids[n] >= 2) && (lcids[n] <= 10)) {
/* Look for mapping for this LCID to drb channel set by UAT table */
rlc_channel_type_t rlc_channel_type;
guint8 UM_seqnum_length;
gint drb_id;
guint8 priority = get_mac_lte_channel_priority(p_mac_lte_info->ueid,
lcids[n], direction);
lookup_rlc_channel_from_lcid(p_mac_lte_info->ueid,
lcids[n],
&rlc_channel_type,
&UM_seqnum_length,
&drb_id);
/* Dissect according to channel type */
switch (rlc_channel_type) {
case rlcUM5:
call_rlc_dissector(tvb, pinfo, tree, pdu_ti, offset, data_length,
RLC_UM_MODE, direction, p_mac_lte_info->ueid,
CHANNEL_TYPE_DRB, (guint16)drb_id, UM_seqnum_length,
priority);
break;
case rlcUM10:
call_rlc_dissector(tvb, pinfo, tree, pdu_ti, offset, data_length,
RLC_UM_MODE, direction, p_mac_lte_info->ueid,
CHANNEL_TYPE_DRB, (guint16)drb_id, UM_seqnum_length,
priority);
break;
case rlcAM:
call_rlc_dissector(tvb, pinfo, tree, pdu_ti, offset, data_length,
RLC_AM_MODE, direction, p_mac_lte_info->ueid,
CHANNEL_TYPE_DRB, (guint16)drb_id, 0,
priority);
break;
case rlcTM:
call_rlc_dissector(tvb, pinfo, tree, pdu_ti, offset, data_length,
RLC_TM_MODE, direction, p_mac_lte_info->ueid,
CHANNEL_TYPE_DRB, (guint16)drb_id, 0,
priority);
break;
case rlcRaw:
/* Nothing to do! */
break;
}
if (rlc_channel_type != rlcRaw) {
/* Hide raw view of bytes */
PROTO_ITEM_SET_HIDDEN(sdu_ti);
rlc_called_for_sdu = TRUE;
}
}
/* Show bytes too, if won't be hidden (slow). There must be a nicer way of doing this! */
if (!rlc_called_for_sdu) {
pdu_data = tvb_get_ptr(tvb, offset, pdu_lengths[n]);
for (i=0; i < data_length; i++) {
g_snprintf(buff+(i*2), 3, "%02x", pdu_data[i]);
if (i >= 30) {
g_snprintf(buff+(i*2), 4, "...");
break;
}
}
proto_item_append_text(sdu_ti, "%s", buff);
}
offset += data_length;
/* Update tap byte count for this channel */
tap_info->bytes_for_lcid[lcids[n]] += data_length;
}
/* Now padding, if present, extends to the end of the PDU */
if (lcids[number_of_headers-1] == PADDING_LCID) {
if (tvb_length_remaining(tvb, offset) > 0) {
proto_tree_add_item(tree, hf_mac_lte_padding_data,
tvb, offset, -1, ENC_NA);
}
padding_length_ti = proto_tree_add_int(tree, hf_mac_lte_padding_length,
tvb, offset, 0,
p_mac_lte_info->length - offset);
PROTO_ITEM_SET_GENERATED(padding_length_ti);
/* Update padding bytes in stats */
tap_info->padding_bytes += (p_mac_lte_info->length - offset);
/* Make sure the PDU isn't bigger than reported! */
if (offset > p_mac_lte_info->length) {
expert_add_info_format(pinfo, padding_length_ti, &ei_mac_lte_context_length,
"%s MAC PDU is longer than reported length (reported=%u, actual=%u)",
(direction == DIRECTION_UPLINK) ? "UL-SCH" : "DL-SCH",
p_mac_lte_info->length, offset);
}
}
else {
/* There is no padding at the end of the frame */
if (!is_truncated && (offset < p_mac_lte_info->length)) {
/* There is a problem if we haven't used all of the PDU */
expert_add_info_format(pinfo, pdu_ti, &ei_mac_lte_context_length,
"%s PDU for UE %u is shorter than reported length (reported=%u, actual=%u)",
(direction == DIRECTION_UPLINK) ? "UL-SCH" : "DL-SCH",
p_mac_lte_info->ueid, p_mac_lte_info->length, offset);
}
if (!is_truncated && (offset > p_mac_lte_info->length)) {
/* There is a problem if the PDU is longer than rpeported */
expert_add_info_format(pinfo, pdu_ti, &ei_mac_lte_context_length,
"%s PDU for UE %u is longer than reported length (reported=%u, actual=%u)",
(direction == DIRECTION_UPLINK) ? "UL-SCH" : "DL-SCH",
p_mac_lte_info->ueid, p_mac_lte_info->length, offset);
}
}
/* Can now store updated DRX info and show its info in the tree */
if (global_mac_lte_show_drx) {
if (!pinfo->fd->flags.visited) {
/* Store 'after' snapshot of UE state for this frame */
set_drx_info(pinfo, p_mac_lte_info, FALSE);
}
/* Show current DRX state in tree as 'after' */
show_drx_info(pinfo, tree, tvb, p_mac_lte_info, FALSE);
}
}
static void dissect_mch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, proto_item *pdu_ti,
volatile guint32 offset, mac_lte_info *p_mac_lte_info)
{
guint8 extension;
volatile guint16 n;
proto_item *truncated_ti;
proto_item *padding_length_ti;
proto_item *hidden_root_ti;
/* Keep track of LCIDs and lengths as we dissect the header */
volatile guint16 number_of_headers = 0;
guint8 lcids[MAX_HEADERS_IN_PDU];
gint16 pdu_lengths[MAX_HEADERS_IN_PDU];
proto_item *pdu_header_ti, *sched_info_ti = NULL;
proto_tree *pdu_header_tree;
gboolean have_seen_data_header = FALSE;
guint8 number_of_padding_subheaders = 0;
gboolean have_seen_non_padding_control = FALSE;
gboolean expecting_body_data = FALSE;
volatile guint32 is_truncated = FALSE;
write_pdu_label_and_info_literal(pdu_ti, NULL, pinfo, "MCH: ");
/* Add hidden item to filter on */
hidden_root_ti = proto_tree_add_string_format(tree, hf_mac_lte_mch, tvb,
offset, 0, "", "Hidden header");
PROTO_ITEM_SET_HIDDEN(hidden_root_ti);
/* Add PDU block header subtree */
pdu_header_ti = proto_tree_add_string_format(tree, hf_mac_lte_mch_header,
tvb, offset, 0,
"",
"MAC PDU Header");
pdu_header_tree = proto_item_add_subtree(pdu_header_ti, ett_mac_lte_mch_header);
/************************************************************************/
/* Dissect each sub-header. */
do {
guint8 reserved;
guint64 length = 0;
proto_item *pdu_subheader_ti;
proto_tree *pdu_subheader_tree;
proto_item *lcid_ti;
proto_item *ti;
gint offset_start_subheader = offset;
guint8 first_byte = tvb_get_guint8(tvb, offset);
/* Add PDU block header subtree.
Default with length of 1 byte. */
pdu_subheader_ti = proto_tree_add_string_format(pdu_header_tree,
hf_mac_lte_mch_subheader,
tvb, offset, 1,
"",
"Sub-header");
pdu_subheader_tree = proto_item_add_subtree(pdu_subheader_ti,
ett_mac_lte_mch_subheader);
/* Check 1st 2 reserved bits */
reserved = (first_byte & 0xc0) >> 6;
ti = proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_mch_reserved,
tvb, offset, 1, ENC_BIG_ENDIAN);
if (reserved != 0) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_reserved_not_zero,
"MCH header Reserved bits not zero");
}
/* Extended bit */
extension = (first_byte & 0x20) >> 5;
proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_mch_extended,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* LCID */
lcids[number_of_headers] = first_byte & 0x1f;
lcid_ti = proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_mch_lcid,
tvb, offset, 1, ENC_BIG_ENDIAN);
if (lcids[number_of_headers] == MCH_SCHEDULING_INFO_LCID) {
sched_info_ti = lcid_ti;
}
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"(%s",
val_to_str_const(lcids[number_of_headers],
mch_lcid_vals, "(Unknown LCID)"));
offset++;
/* Remember if we've seen a data subheader */
if (lcids[number_of_headers] <= 28) {
have_seen_data_header = TRUE;
expecting_body_data = TRUE;
}
/* Show an expert item if a contol subheader (except Padding) appears
*after* a data PDU */
if (have_seen_data_header &&
(lcids[number_of_headers] > 28) && (lcids[number_of_headers] != PADDING_LCID)) {
expert_add_info_format(pinfo, lcid_ti, &ei_mac_lte_control_subheader_after_data_subheader,
"MCH Control subheaders should not appear after data subheaders");
return;
}
/* Should not see padding after non-padding control... */
if ((lcids[number_of_headers] > 28) &&
(lcids[number_of_headers] == PADDING_LCID) &&
extension)
{
number_of_padding_subheaders++;
if (number_of_padding_subheaders > 2) {
expert_add_info(pinfo, lcid_ti, &ei_mac_lte_padding_data_multiple);
}
if (have_seen_non_padding_control) {
expert_add_info(pinfo, lcid_ti, &ei_mac_lte_padding_data_before_control_subheader);
}
}
/* Remember that we've seen non-padding control */
if ((lcids[number_of_headers] > 28) &&
(lcids[number_of_headers] != PADDING_LCID)) {
have_seen_non_padding_control = TRUE;
}
/********************************************************************/
/* Length field follows if not the last header or for a fixed-sized
control element */
if (!extension) {
/* Last one... */
pdu_lengths[number_of_headers] = -1;
}
else {
/* Not the last one */
if (lcids[number_of_headers] != PADDING_LCID) {
guint8 format;
/* F(ormat) bit tells us how long the length field is */
format = (tvb_get_guint8(tvb, offset) & 0x80) >> 7;
proto_tree_add_item(pdu_subheader_tree, hf_mac_lte_mch_format,
tvb, offset, 1, ENC_BIG_ENDIAN);
/* Now read length field itself */
if (format) {
/* >= 128 - use 15 bits */
proto_tree_add_bits_ret_val(pdu_subheader_tree, hf_mac_lte_mch_length,
tvb, offset*8 + 1, 15, &length, ENC_BIG_ENDIAN);
offset += 2;
}
else {
/* Less than 128 - only 7 bits */
proto_tree_add_bits_ret_val(pdu_subheader_tree, hf_mac_lte_mch_length,
tvb, offset*8 + 1, 7, &length, ENC_BIG_ENDIAN);
offset++;
}
pdu_lengths[number_of_headers] = (gint16)length;
}
else {
pdu_lengths[number_of_headers] = 0;
}
}
/* Close off description in info column */
switch (pdu_lengths[number_of_headers]) {
case 0:
write_pdu_label_and_info_literal(pdu_ti, NULL, pinfo, ") ");
break;
case -1:
write_pdu_label_and_info_literal(pdu_ti, NULL, pinfo, ":remainder) ");
break;
default:
write_pdu_label_and_info(pdu_ti, NULL, pinfo, ":%u bytes) ",
pdu_lengths[number_of_headers]);
break;
}
/* Append summary to subheader root */
proto_item_append_text(pdu_subheader_ti, " (lcid=%s",
val_to_str_const(lcids[number_of_headers],
mch_lcid_vals, "Unknown"));
switch (pdu_lengths[number_of_headers]) {
case -1:
proto_item_append_text(pdu_subheader_ti, ", length is remainder)");
proto_item_append_text(pdu_header_ti, " (%s:remainder)",
val_to_str_const(lcids[number_of_headers],
mch_lcid_vals,
"Unknown"));
break;
case 0:
proto_item_append_text(pdu_subheader_ti, ")");
proto_item_append_text(pdu_header_ti, " (%s)",
val_to_str_const(lcids[number_of_headers],
mch_lcid_vals,
"Unknown"));
break;
default:
proto_item_append_text(pdu_subheader_ti, ", length=%u)",
pdu_lengths[number_of_headers]);
proto_item_append_text(pdu_header_ti, " (%s:%u)",
val_to_str_const(lcids[number_of_headers],
mch_lcid_vals,
"Unknown"),
pdu_lengths[number_of_headers]);
break;
}
/* Flag unknown lcid values in expert info */
if (try_val_to_str(lcids[number_of_headers],mch_lcid_vals) == NULL) {
expert_add_info_format(pinfo, pdu_subheader_ti, &ei_mac_lte_lcid_unexpected,
"MCH: Unexpected LCID received (%u)",
lcids[number_of_headers]);
}
/* Set length of this subheader */
proto_item_set_len(pdu_subheader_ti, offset - offset_start_subheader);
number_of_headers++;
} while ((number_of_headers < MAX_HEADERS_IN_PDU) && extension);
/* Check that we didn't reach the end of the subheader array... */
if (number_of_headers >= MAX_HEADERS_IN_PDU) {
proto_tree_add_expert_format(tree, pinfo, &ei_mac_lte_too_many_subheaders, tvb, offset, 1,
"Reached %u subheaders - frame obviously malformed",
MAX_HEADERS_IN_PDU);
return;
}
/* Append summary to overall PDU header root */
proto_item_append_text(pdu_header_ti, " (%u subheaders)",
number_of_headers);
/* And set its length to offset */
proto_item_set_len(pdu_header_ti, offset);
/************************************************************************/
/* Dissect SDUs / control elements / padding. */
/************************************************************************/
/* Dissect control element bodies first */
for (n=0; n < number_of_headers; n++) {
/* Get out of loop once see any data SDU subheaders */
if (lcids[n] <= 28) {
break;
}
/* Process what should be a valid control PDU type */
switch (lcids[n]) {
case MCH_SCHEDULING_INFO_LCID:
{
guint32 curr_offset = offset;
gint16 i;
guint16 stop_mtch_val;
proto_item *mch_sched_info_ti, *ti;
proto_tree *mch_sched_info_tree;
if (pdu_lengths[n] == -1) {
/* Control Element size is the remaining PDU */
pdu_lengths[n] = (gint16)tvb_length_remaining(tvb, curr_offset);
}
if (pdu_lengths[n] & 0x01) {
expert_add_info_format(pinfo, sched_info_ti, &ei_mac_lte_context_length,
"MCH Scheduling Information MAC Control Element should have an even size");
}
mch_sched_info_ti = proto_tree_add_string_format(tree,
hf_mac_lte_control_mch_scheduling_info,
tvb, curr_offset, pdu_lengths[n],
"",
"MCH Scheduling Information");
mch_sched_info_tree = proto_item_add_subtree(mch_sched_info_ti, ett_mac_lte_mch_scheduling_info);
for (i=0; i<(pdu_lengths[n]/2); i++) {
proto_tree_add_item(mch_sched_info_tree, hf_mac_lte_control_mch_scheduling_info_lcid,
tvb, curr_offset, 1, ENC_BIG_ENDIAN);
stop_mtch_val = tvb_get_ntohs(tvb, curr_offset) & 0x7ff;
ti = proto_tree_add_item(mch_sched_info_tree, hf_mac_lte_control_mch_scheduling_info_stop_mtch,
tvb, curr_offset, 2, ENC_BIG_ENDIAN);
if ((stop_mtch_val >= 2043) && (stop_mtch_val <= 2046)) {
proto_item_append_text(ti, " (reserved)");
}
else if (stop_mtch_val == 2047) {
proto_item_append_text(ti, " (MTCH is not scheduled)");
}
curr_offset += 2;
}
offset += pdu_lengths[n];
}
break;
case PADDING_LCID:
/* No payload (in this position) */
break;
default:
break;
}
}
/* There might not be any data, if only headers (plus control data) were logged */
is_truncated = ((tvb_length_remaining(tvb, offset) == 0) && expecting_body_data);
truncated_ti = proto_tree_add_uint(tree, hf_mac_lte_mch_header_only, tvb, 0, 0,
is_truncated);
if (is_truncated) {
PROTO_ITEM_SET_GENERATED(truncated_ti);
expert_add_info(pinfo, truncated_ti, &ei_mac_lte_sch_header_only);
return;
}
else {
PROTO_ITEM_SET_HIDDEN(truncated_ti);
}
/* Now process remaining bodies, which should all be data */
for (; n < number_of_headers; n++) {
proto_item *sdu_ti;
const guint8 *pdu_data;
volatile guint16 data_length;
int i;
char buff[64];
/* Break out if meet padding */
if (lcids[n] == PADDING_LCID) {
break;
}
/* Work out length */
data_length = (pdu_lengths[n] == -1) ?
tvb_length_remaining(tvb, offset) :
pdu_lengths[n];
if ((lcids[n] == 0) && global_mac_lte_attempt_mcch_decode) {
/* Call RLC dissector */
call_rlc_dissector(tvb, pinfo, tree, pdu_ti, offset, data_length,
RLC_UM_MODE, DIRECTION_DOWNLINK, 0,
CHANNEL_TYPE_MCCH, 0, 5, 0);
} else if ((lcids[n] <= 28) && global_mac_lte_call_rlc_for_mtch) {
/* Call RLC dissector */
call_rlc_dissector(tvb, pinfo, tree, pdu_ti, offset, data_length,
RLC_UM_MODE, DIRECTION_DOWNLINK, 0,
CHANNEL_TYPE_MTCH, 0, 5, 0);
} else {
/* Dissect SDU as raw bytes */
sdu_ti = proto_tree_add_bytes_format(tree, hf_mac_lte_mch_sdu, tvb, offset, pdu_lengths[n],
NULL, "SDU (%s, length=%u bytes): ",
val_to_str_const(lcids[n], mch_lcid_vals, "Unknown"),
data_length);
/* Show bytes too. There must be a nicer way of doing this! */
pdu_data = tvb_get_ptr(tvb, offset, pdu_lengths[n]);
for (i=0; i < data_length; i++) {
g_snprintf(buff+(i*2), 3, "%02x", pdu_data[i]);
if (i >= 30) {
g_snprintf(buff+(i*2), 4, "...");
break;
}
}
proto_item_append_text(sdu_ti, "%s", buff);
}
offset += data_length;
}
/* Now padding, if present, extends to the end of the PDU */
if (lcids[number_of_headers-1] == PADDING_LCID) {
if (tvb_length_remaining(tvb, offset) > 0) {
proto_tree_add_item(tree, hf_mac_lte_padding_data,
tvb, offset, -1, ENC_NA);
}
padding_length_ti = proto_tree_add_int(tree, hf_mac_lte_padding_length,
tvb, offset, 0,
p_mac_lte_info->length - offset);
PROTO_ITEM_SET_GENERATED(padding_length_ti);
/* Make sure the PDU isn't bigger than reported! */
if (offset > p_mac_lte_info->length) {
expert_add_info_format(pinfo, padding_length_ti, &ei_mac_lte_context_length,
"MAC PDU is longer than reported length (reported=%u, actual=%u)",
p_mac_lte_info->length, offset);
}
}
else {
/* There is no padding at the end of the frame */
if (!is_truncated && (offset < p_mac_lte_info->length)) {
/* There is a problem if we haven't used all of the PDU */
expert_add_info_format(pinfo, pdu_ti, &ei_mac_lte_context_length,
"PDU is shorter than reported length (reported=%u, actual=%u)",
p_mac_lte_info->length, offset);
}
if (!is_truncated && (offset > p_mac_lte_info->length)) {
/* There is a problem if the PDU is longer than rpeported */
expert_add_info_format(pinfo, pdu_ti, &ei_mac_lte_context_length,
"PDU is longer than reported length (reported=%u, actual=%u)",
p_mac_lte_info->length, offset);
}
}
}
/*****************************/
/* Main dissection function. */
void dissect_mac_lte(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *mac_lte_tree;
proto_item *pdu_ti;
proto_tree *context_tree;
proto_item *context_ti;
proto_item *retx_ti = NULL;
proto_item *ti;
gint offset = 0;
struct mac_lte_info *p_mac_lte_info;
gint n;
/* Allocate and zero tap struct */
mac_lte_tap_info *tap_info = (mac_lte_tap_info *)wmem_alloc0(wmem_packet_scope(), sizeof(mac_lte_tap_info));
/* Set protocol name */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "MAC-LTE");
/* Create protocol tree. */
pdu_ti = proto_tree_add_item(tree, proto_mac_lte, tvb, offset, -1, ENC_NA);
proto_item_append_text(pdu_ti, " ");
mac_lte_tree = proto_item_add_subtree(pdu_ti, ett_mac_lte);
/* Look for packet info! */
p_mac_lte_info = (mac_lte_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_mac_lte, 0);
/* Can't dissect anything without it... */
if (p_mac_lte_info == NULL) {
proto_item *tii =
proto_tree_add_text(mac_lte_tree, tvb, offset, -1,
"Can't dissect LTE MAC frame because no per-frame info was attached!");
PROTO_ITEM_SET_GENERATED(tii);
return;
}
/* Clear info column */
col_clear(pinfo->cinfo, COL_INFO);
/*****************************************/
/* Show context information */
/* Create context root */
context_ti = proto_tree_add_string_format(mac_lte_tree, hf_mac_lte_context,
tvb, offset, 0, "", "Context");
context_tree = proto_item_add_subtree(context_ti, ett_mac_lte_context);
PROTO_ITEM_SET_GENERATED(context_ti);
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_radio_type,
tvb, 0, 0, p_mac_lte_info->radioType);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_direction,
tvb, 0, 0, p_mac_lte_info->direction);
PROTO_ITEM_SET_GENERATED(ti);
if (p_mac_lte_info->ueid != 0) {
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_ueid,
tvb, 0, 0, p_mac_lte_info->ueid);
PROTO_ITEM_SET_GENERATED(ti);
}
/* There are several out-of-band MAC events that may be indicated in the context info. */
/* Handle them here */
if (p_mac_lte_info->length == 0) {
proto_item *preamble_ti;
proto_tree *preamble_tree;
switch (p_mac_lte_info->oob_event) {
case ltemac_send_preamble:
preamble_ti = proto_tree_add_item(mac_lte_tree, hf_mac_lte_oob_send_preamble,
tvb, 0, 0, ENC_ASCII|ENC_NA);
preamble_tree = proto_item_add_subtree(preamble_ti, ett_mac_lte_oob);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(preamble_tree, hf_mac_lte_context_rapid,
tvb, 0, 0, p_mac_lte_info->rapid);
PROTO_ITEM_SET_GENERATED(ti);
ti = proto_tree_add_uint(preamble_tree, hf_mac_lte_context_rach_attempt_number,
tvb, 0, 0, p_mac_lte_info->rach_attempt_number);
PROTO_ITEM_SET_GENERATED(ti);
/* Info column */
write_pdu_label_and_info(pdu_ti, preamble_ti, pinfo,
"RACH Preamble chosen for UE %u (RAPID=%u, attempt=%u)",
p_mac_lte_info->ueid, p_mac_lte_info->rapid,
p_mac_lte_info->rach_attempt_number);
/* Add expert info (a note, unless attempt > 1) */
expert_add_info_format(pinfo, ti,
(p_mac_lte_info->rach_attempt_number > 1) ? &ei_mac_lte_rach_preamble_sent_warn : &ei_mac_lte_rach_preamble_sent_note,
"RACH Preamble sent for UE %u (RAPID=%u, attempt=%u)",
p_mac_lte_info->ueid, p_mac_lte_info->rapid,
p_mac_lte_info->rach_attempt_number);
break;
case ltemac_send_sr:
/* Count of SRs */
ti = proto_tree_add_uint(mac_lte_tree, hf_mac_lte_number_of_srs,
tvb, 0, 0, p_mac_lte_info->number_of_srs);
PROTO_ITEM_SET_GENERATED(ti);
for (n=0; n < p_mac_lte_info->number_of_srs; n++) {
proto_item *sr_ti;
proto_tree *sr_tree;
/* SR event is subtree */
sr_ti = proto_tree_add_expert_format(mac_lte_tree, pinfo, &ei_mac_lte_oob_send_sr,
tvb, 0, 0,
"Scheduling Request sent for UE %u (RNTI %u)", p_mac_lte_info->oob_ueid[n], p_mac_lte_info->oob_rnti[n]);
sr_tree = proto_item_add_subtree(sr_ti, ett_mac_lte_oob);
PROTO_ITEM_SET_GENERATED(sr_ti);
/* RNTI */
ti = proto_tree_add_uint(sr_tree, hf_mac_lte_context_rnti,
tvb, 0, 0, p_mac_lte_info->oob_rnti[n]);
PROTO_ITEM_SET_GENERATED(ti);
/* UEID */
ti = proto_tree_add_uint(sr_tree, hf_mac_lte_context_ueid,
tvb, 0, 0, p_mac_lte_info->oob_ueid[n]);
PROTO_ITEM_SET_GENERATED(ti);
/* Add summary to root. */
proto_item_append_text(sr_ti, " (UE=%u C-RNTI=%u)",
p_mac_lte_info->oob_ueid[n],
p_mac_lte_info->oob_rnti[n]);
/* Info column */
if (n == 0) {
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"Scheduling Requests (%u) sent: (UE=%u C-RNTI=%u)",
p_mac_lte_info->number_of_srs,
p_mac_lte_info->oob_ueid[n],
p_mac_lte_info->oob_rnti[n]);
}
else {
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
" (UE=%u C-RNTI=%u)",
p_mac_lte_info->oob_ueid[n],
p_mac_lte_info->oob_rnti[n]);
}
/* Update SR status for this UE */
if (global_mac_lte_track_sr) {
TrackSRInfo(SR_Request, pinfo, mac_lte_tree, tvb, p_mac_lte_info, n, sr_ti);
}
}
break;
case ltemac_sr_failure:
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_rnti,
tvb, 0, 0, p_mac_lte_info->rnti);
PROTO_ITEM_SET_GENERATED(ti);
proto_tree_add_expert_format(mac_lte_tree, pinfo, &ei_mac_lte_oob_sr_failure,
tvb, 0, 0, "Scheduling Request failed for UE %u (RNTI %u)",
p_mac_lte_info->ueid, p_mac_lte_info->rnti);
PROTO_ITEM_SET_GENERATED(ti);
/* Info column */
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"Scheduling Request FAILED for UE %u (C-RNTI=%u)",
p_mac_lte_info->ueid,
p_mac_lte_info->rnti);
/* Update SR status */
if (global_mac_lte_track_sr) {
TrackSRInfo(SR_Failure, pinfo, mac_lte_tree, tvb, p_mac_lte_info, 0, ti);
}
break;
}
/* Our work here is done */
return;
}
/* Show remaining meta information */
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_sysframe_number,
tvb, 0, 0, p_mac_lte_info->sysframeNumber);
PROTO_ITEM_SET_GENERATED(ti);
if (p_mac_lte_info->sysframeNumber > 1023) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_sysframe_number,
"Sysframe number (%u) out of range - valid range is 0-1023",
p_mac_lte_info->sysframeNumber);
}
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_subframe_number,
tvb, 0, 0, p_mac_lte_info->subframeNumber);
PROTO_ITEM_SET_GENERATED(ti);
if (p_mac_lte_info->subframeNumber > 9) {
/* N.B. if we set it to valid value, it won't trigger when we rescan
(at least with DCT2000 files where the context struct isn't re-read). */
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_sysframe_number,
"Subframe number (%u) out of range - valid range is 0-9",
p_mac_lte_info->subframeNumber);
}
if (p_mac_lte_info->subframeNumberOfGrantPresent) {
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_grant_subframe_number,
tvb, 0, 0, p_mac_lte_info->subframeNumberOfGrant);
PROTO_ITEM_SET_GENERATED(ti);
}
if (p_mac_lte_info->rntiType != NO_RNTI) {
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_rnti,
tvb, 0, 0, p_mac_lte_info->rnti);
PROTO_ITEM_SET_GENERATED(ti);
proto_item_append_text(context_ti, " (RNTI=%u)", p_mac_lte_info->rnti);
}
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_rnti_type,
tvb, 0, 0, p_mac_lte_info->rntiType);
PROTO_ITEM_SET_GENERATED(ti);
/* Check that RNTI value is consistent with given RNTI type */
switch (p_mac_lte_info->rntiType) {
case M_RNTI:
if (p_mac_lte_info->rnti != 0xFFFD) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_rnti_type,
"M-RNTI indicated, but value is %u (0x%x) (must be 0x%x)",
p_mac_lte_info->rnti, p_mac_lte_info->rnti, 0xFFFD);
return;
}
break;
case P_RNTI:
if (p_mac_lte_info->rnti != 0xFFFE) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_rnti_type,
"P-RNTI indicated, but value is %u (0x%x) (must be 0x%x)",
p_mac_lte_info->rnti, p_mac_lte_info->rnti, 0xFFFE);
return;
}
break;
case SI_RNTI:
if (p_mac_lte_info->rnti != 0xFFFF) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_rnti_type,
"SI-RNTI indicated, but value is %u (0x%x) (must be 0x%x)",
p_mac_lte_info->rnti, p_mac_lte_info->rnti, 0xFFFE);
return;
}
break;
case RA_RNTI:
if ((p_mac_lte_info->rnti < 0x0001) || (p_mac_lte_info->rnti > 0x003C)) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_rnti_type,
"RA_RNTI indicated, but given value %u (0x%x)is out of range",
p_mac_lte_info->rnti, p_mac_lte_info->rnti);
return;
}
break;
case C_RNTI:
case SPS_RNTI:
if ((p_mac_lte_info->rnti < 0x0001) || (p_mac_lte_info->rnti > 0xFFF3)) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_rnti_type,
"%s indicated, but given value %u (0x%x)is out of range",
val_to_str_const(p_mac_lte_info->rntiType, rnti_type_vals, "Unknown"),
p_mac_lte_info->rnti, p_mac_lte_info->rnti);
return;
}
break;
default:
break;
}
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_predefined_frame,
tvb, 0, 0, p_mac_lte_info->isPredefinedData);
if (p_mac_lte_info->isPredefinedData) {
PROTO_ITEM_SET_GENERATED(ti);
}
else {
PROTO_ITEM_SET_HIDDEN(ti);
}
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_length,
tvb, 0, 0, p_mac_lte_info->length);
PROTO_ITEM_SET_GENERATED(ti);
/* Infer uplink grant size */
if (p_mac_lte_info->direction == DIRECTION_UPLINK) {
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_ul_grant_size,
tvb, 0, 0, p_mac_lte_info->length);
PROTO_ITEM_SET_GENERATED(ti);
}
/* Retx count goes in top-level tree to make it more visible */
if (p_mac_lte_info->reTxCount) {
proto_item *retx_reason_ti;
retx_ti = proto_tree_add_uint(mac_lte_tree, hf_mac_lte_context_retx_count,
tvb, 0, 0, p_mac_lte_info->reTxCount);
PROTO_ITEM_SET_GENERATED(retx_ti);
if (p_mac_lte_info->reTxCount >= global_mac_lte_retx_counter_trigger) {
expert_add_info_format(pinfo, retx_ti, &ei_mac_lte_ul_mac_frame_retx,
"UE %u: UL MAC frame ReTX no. %u",
p_mac_lte_info->ueid, p_mac_lte_info->reTxCount);
}
retx_reason_ti = proto_tree_add_uint(mac_lte_tree, hf_mac_lte_context_retx_reason,
tvb, 0, 0, p_mac_lte_info->isPHICHNACK);
PROTO_ITEM_SET_GENERATED(retx_reason_ti);
}
if (p_mac_lte_info->crcStatusValid) {
/* Set status */
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_crc_status,
tvb, 0, 0, p_mac_lte_info->detailed_phy_info.dl_info.crc_status);
PROTO_ITEM_SET_GENERATED(ti);
/* Report non-success */
if (p_mac_lte_info->detailed_phy_info.dl_info.crc_status != crc_success) {
expert_add_info_format(pinfo, ti, &ei_mac_lte_context_crc_status,
"%s Frame has CRC error problem (%s)",
(p_mac_lte_info->direction == DIRECTION_UPLINK) ? "UL" : "DL",
val_to_str_const(p_mac_lte_info->detailed_phy_info.dl_info.crc_status,
crc_status_vals,
"Unknown"));
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"%s: <CRC %s> UEId=%u %s=%u ",
(p_mac_lte_info->direction == DIRECTION_UPLINK) ? "UL" : "DL",
val_to_str_const(p_mac_lte_info->detailed_phy_info.dl_info.crc_status,
crc_status_vals,
"Unknown"),
p_mac_lte_info->ueid,
val_to_str_const(p_mac_lte_info->rntiType, rnti_type_vals,
"Unknown RNTI type"),
p_mac_lte_info->rnti);
}
}
/* Carrier Id */
ti = proto_tree_add_uint(context_tree, hf_mac_lte_context_carrier_id,
tvb, 0, 0, p_mac_lte_info->carrierId);
PROTO_ITEM_SET_GENERATED(ti);
/* May also have extra Physical layer attributes set for this frame */
show_extra_phy_parameters(pinfo, tvb, mac_lte_tree, p_mac_lte_info);
/* Set context-info parts of tap struct */
tap_info->rnti = p_mac_lte_info->rnti;
tap_info->ueid = p_mac_lte_info->ueid;
tap_info->rntiType = p_mac_lte_info->rntiType;
tap_info->isPredefinedData = p_mac_lte_info->isPredefinedData;
tap_info->isPHYRetx = (p_mac_lte_info->reTxCount >= 1);
tap_info->crcStatusValid = p_mac_lte_info->crcStatusValid;
tap_info->crcStatus = p_mac_lte_info->detailed_phy_info.dl_info.crc_status;
tap_info->direction = p_mac_lte_info->direction;
tap_info->time = pinfo->fd->abs_ts;
/* Also set total number of bytes (won't be used for UL/DL-SCH) */
tap_info->single_number_of_bytes = tvb_length_remaining(tvb, offset);
/* If we know its predefined data, don't try to decode any further */
if (p_mac_lte_info->isPredefinedData) {
proto_tree_add_item(mac_lte_tree, hf_mac_lte_predefined_pdu, tvb, offset, -1, ENC_NA);
write_pdu_label_and_info(pdu_ti, NULL, pinfo,
"Predefined data (%u bytes%s)",
p_mac_lte_info->length,
(p_mac_lte_info->length > tvb_length_remaining(tvb, offset) ?
" - truncated" :
""));
/* Queue tap info */
if (!pinfo->flags.in_error_pkt) {
tap_queue_packet(mac_lte_tap, pinfo, tap_info);
}
return;
}
/* IF CRC status failed, just do decode as raw bytes */
if (!global_mac_lte_dissect_crc_failures &&
(p_mac_lte_info->crcStatusValid &&
(p_mac_lte_info->detailed_phy_info.dl_info.crc_status != crc_success))) {
proto_tree_add_item(mac_lte_tree, hf_mac_lte_raw_pdu, tvb, offset, -1, ENC_NA);
write_pdu_label_and_info(pdu_ti, NULL, pinfo, "Raw data (%u bytes)", tvb_length_remaining(tvb, offset));
/* Queue tap info.
TODO: unfortunately DL retx detection won't get done if we return here... */
if (!pinfo->flags.in_error_pkt) {
tap_queue_packet(mac_lte_tap, pinfo, tap_info);
}
return;
}
/* Reset this counter */
s_number_of_rlc_pdus_shown = 0;
/* Dissect the MAC PDU itself. Format depends upon RNTI type. */
switch (p_mac_lte_info->rntiType) {
case P_RNTI:
/* PCH PDU */
dissect_pch(tvb, pinfo, mac_lte_tree, pdu_ti, offset, p_mac_lte_info->direction, tap_info);
break;
case RA_RNTI:
/* RAR PDU */
dissect_rar(tvb, pinfo, mac_lte_tree, pdu_ti, offset, p_mac_lte_info, tap_info);
break;
case C_RNTI:
case SPS_RNTI:
/* Can be UL-SCH or DL-SCH */
dissect_ulsch_or_dlsch(tvb, pinfo, mac_lte_tree, pdu_ti, offset,
p_mac_lte_info->direction, p_mac_lte_info, tap_info,
retx_ti, context_tree);
break;
case SI_RNTI:
/* BCH over DL-SCH */
dissect_bch(tvb, pinfo, mac_lte_tree, pdu_ti, offset, p_mac_lte_info);
break;
case M_RNTI:
/* MCH PDU */
dissect_mch(tvb, pinfo, mac_lte_tree, pdu_ti, offset, p_mac_lte_info);
break;
case NO_RNTI:
/* Must be BCH over BCH... */
dissect_bch(tvb, pinfo, mac_lte_tree, pdu_ti, offset, p_mac_lte_info);
break;
default:
break;
}
/* Queue tap info */
tap_queue_packet(mac_lte_tap, pinfo, tap_info);
}
/* Initializes the hash tables each time a new
* file is loaded or re-loaded in wireshark */
static void mac_lte_init_protocol(void)
{
/* Destroy any existing tables. */
if (mac_lte_msg3_hash) {
g_hash_table_destroy(mac_lte_msg3_hash);
}
if (mac_lte_cr_result_hash) {
g_hash_table_destroy(mac_lte_cr_result_hash);
}
if (mac_lte_dl_harq_hash) {
g_hash_table_destroy(mac_lte_dl_harq_hash);
}
if (mac_lte_dl_harq_result_hash) {
g_hash_table_destroy(mac_lte_dl_harq_result_hash);
}
if (mac_lte_ul_harq_hash) {
g_hash_table_destroy(mac_lte_ul_harq_hash);
}
if (mac_lte_ul_harq_result_hash) {
g_hash_table_destroy(mac_lte_ul_harq_result_hash);
}
if (mac_lte_ue_sr_state) {
g_hash_table_destroy(mac_lte_ue_sr_state);
}
if (mac_lte_sr_request_hash) {
g_hash_table_destroy(mac_lte_sr_request_hash);
}
if (mac_lte_tti_info_result_hash) {
g_hash_table_destroy(mac_lte_tti_info_result_hash);
}
if (mac_lte_ue_channels_hash) {
g_hash_table_destroy(mac_lte_ue_channels_hash);
}
if (mac_lte_drx_ue_state) {
g_hash_table_destroy(mac_lte_drx_ue_state);
}
if (mac_lte_drx_frame_result) {
g_hash_table_destroy(mac_lte_drx_frame_result);
}
/* Reset structs */
memset(&UL_tti_info, 0, sizeof(UL_tti_info));
UL_tti_info.subframe = 0xff; /* Invalid value */
memset(&DL_tti_info, 0, sizeof(DL_tti_info));
DL_tti_info.subframe = 0xff; /* Invalid value */
/* Now create them over */
mac_lte_msg3_hash = g_hash_table_new(mac_lte_rnti_hash_func, mac_lte_rnti_hash_equal);
mac_lte_cr_result_hash = g_hash_table_new(mac_lte_framenum_hash_func, mac_lte_framenum_hash_equal);
mac_lte_dl_harq_hash = g_hash_table_new(mac_lte_rnti_hash_func, mac_lte_rnti_hash_equal);
mac_lte_dl_harq_result_hash = g_hash_table_new(mac_lte_framenum_hash_func, mac_lte_framenum_hash_equal);
mac_lte_ul_harq_hash = g_hash_table_new(mac_lte_rnti_hash_func, mac_lte_rnti_hash_equal);
mac_lte_ul_harq_result_hash = g_hash_table_new(mac_lte_framenum_hash_func, mac_lte_framenum_hash_equal);
mac_lte_ue_sr_state = g_hash_table_new(mac_lte_rnti_hash_func, mac_lte_rnti_hash_equal);
mac_lte_sr_request_hash = g_hash_table_new(mac_lte_framenum_hash_func, mac_lte_framenum_hash_equal);
mac_lte_tti_info_result_hash = g_hash_table_new(mac_lte_framenum_hash_func, mac_lte_framenum_hash_equal);
mac_lte_ue_channels_hash = g_hash_table_new(mac_lte_rnti_hash_func, mac_lte_rnti_hash_equal);
mac_lte_drx_ue_state = g_hash_table_new(mac_lte_rnti_hash_func, mac_lte_rnti_hash_equal);
mac_lte_drx_frame_result = g_hash_table_new(mac_lte_framenum_hash_func, mac_lte_framenum_hash_equal);
}
/* Callback used as part of configuring a channel mapping using UAT */
static void* lcid_drb_mapping_copy_cb(void* dest, const void* orig, size_t len _U_)
{
const lcid_drb_mapping_t *o = (const lcid_drb_mapping_t *)orig;
lcid_drb_mapping_t *d = (lcid_drb_mapping_t *)dest;
/* Copy all items over */
d->lcid = o->lcid;
d->drbid = o->drbid;
d->channel_type = o->channel_type;
return d;
}
/*************************************************************************/
/* These functions get called from outside of this module, i.e. from RRC */
/* Set LCID -> RLC channel mappings from signalling protocol (i.e. RRC or similar). */
void set_mac_lte_channel_mapping(drb_mapping_t *drb_mapping)
{
ue_dynamic_drb_mappings_t *ue_mappings;
guint8 lcid = 0;
/* Check lcid range */
if (drb_mapping->lcid_present) {
lcid = drb_mapping->lcid;
/* Ignore if LCID is out of range */
if ((lcid < 3) || (lcid > 10)) {
return;
}
}
/* Look for existing UE entry */
ue_mappings = (ue_dynamic_drb_mappings_t *)g_hash_table_lookup(mac_lte_ue_channels_hash,
GUINT_TO_POINTER((guint)drb_mapping->ueid));
if (!ue_mappings) {
/* If not found, create & add to table */
ue_mappings = wmem_new0(wmem_file_scope(), ue_dynamic_drb_mappings_t);
g_hash_table_insert(mac_lte_ue_channels_hash,
GUINT_TO_POINTER((guint)drb_mapping->ueid),
ue_mappings);
}
/* If lcid wasn't supplied, need to try to look up from drbid */
if ((lcid == 0) && (drb_mapping->drbid < 32)) {
lcid = ue_mappings->drb_to_lcid_mappings[drb_mapping->drbid];
}
if (lcid == 0) {
/* Still no lcid - give up */
return;
}
/* Set array entry */
ue_mappings->mapping[lcid].valid = TRUE;
ue_mappings->mapping[lcid].drbid = drb_mapping->drbid;
ue_mappings->drb_to_lcid_mappings[drb_mapping->drbid] = lcid;
if (drb_mapping->ul_priority_present) {
ue_mappings->mapping[lcid].ul_priority = drb_mapping->ul_priority;
}
/* Fill in available RLC info */
if (drb_mapping->rlcMode_present) {
switch (drb_mapping->rlcMode) {
case RLC_AM_MODE:
ue_mappings->mapping[lcid].channel_type = rlcAM;
break;
case RLC_UM_MODE:
if (drb_mapping->um_sn_length_present) {
if (drb_mapping->um_sn_length == 5) {
ue_mappings->mapping[lcid].channel_type = rlcUM5;
}
else {
ue_mappings->mapping[lcid].channel_type = rlcUM10;
}
break;
}
default:
break;
}
}
}
/* Return the configured UL priority for the channel */
static guint8 get_mac_lte_channel_priority(guint16 ueid, guint8 lcid,
guint8 direction)
{
ue_dynamic_drb_mappings_t *ue_mappings;
/* Priority only affects UL */
if (direction == DIRECTION_DOWNLINK) {
return 0;
}
/* Look up the mappings for this UE */
ue_mappings = (ue_dynamic_drb_mappings_t *)g_hash_table_lookup(mac_lte_ue_channels_hash, GUINT_TO_POINTER((guint)ueid));
if (!ue_mappings) {
return 0;
}
/* Won't report value if channel not configured */
if (!ue_mappings->mapping[lcid].valid) {
return 0;
}
else {
return ue_mappings->mapping[lcid].ul_priority;
}
}
/* Configure the DRX state for this UE (from RRC) */
void set_mac_lte_drx_config(guint16 ueid, drx_config_t *drx_config, packet_info *pinfo)
{
if (global_mac_lte_show_drx && !pinfo->fd->flags.visited) {
drx_state_t *ue_state;
guint32 previousFrameNum = 0;
/* Find or create config/timing struct for this UE */
ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state, GUINT_TO_POINTER((guint)ueid));
if (ue_state == NULL) {
ue_state = (drx_state_t *)wmem_new(wmem_file_scope(), drx_state_t);
g_hash_table_insert(mac_lte_drx_ue_state, GUINT_TO_POINTER((guint)ueid), ue_state);
/* The signalling protocol (i.e. RRC) won't know the current SFN/SF, so
don't try to set a time reference yet */
/* Set time reference for this UE */
/* ue_state->firstCycleStart = pinfo->fd->abs_ts;
ue_state->firstCycleStartSet = TRUE;*/
/* Current time starts off here */
/* ue_state->currentTime = pinfo->fd->abs_ts;*/
}
else {
previousFrameNum = ue_state->config.frameNum;
}
/* Clearing state when new config comes in... */
init_drx_ue_state(ue_state, TRUE);
/* Copy in new config */
ue_state->config = *drx_config;
/* Remember frame when current settings set */
ue_state->config.frameNum = pinfo->fd->num;
/* Also remember any previous config frame number */
ue_state->config.previousFrameNum = previousFrameNum;
}
}
/* Release DRX config for this UE */
void set_mac_lte_drx_config_release(guint16 ueid, packet_info *pinfo)
{
if (global_mac_lte_show_drx && !pinfo->fd->flags.visited) {
/* Find or create config struct for table entry */
drx_state_t *ue_state = (drx_state_t *)g_hash_table_lookup(mac_lte_drx_ue_state, GUINT_TO_POINTER((guint)ueid));
if (ue_state != NULL) {
g_hash_table_remove(mac_lte_drx_ue_state, GUINT_TO_POINTER((guint)ueid));
/* TODO: free entry? */
}
}
}
/* Function to be called from outside this module (e.g. in a plugin) to get per-packet data */
mac_lte_info *get_mac_lte_proto_data(packet_info *pinfo)
{
return (mac_lte_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_mac_lte, 0);
}
/* Function to be called from outside this module (e.g. in a plugin) to set per-packet data */
void set_mac_lte_proto_data(packet_info *pinfo, mac_lte_info *p_mac_lte_info)
{
p_add_proto_data(wmem_file_scope(), pinfo, proto_mac_lte, 0, p_mac_lte_info);
}
void proto_register_mac_lte(void)
{
static hf_register_info hf[] =
{
/**********************************/
/* Items for decoding context */
{ &hf_mac_lte_context,
{ "Context",
"mac-lte.context", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_radio_type,
{ "Radio Type",
"mac-lte.radio-type", FT_UINT8, BASE_DEC, VALS(radio_type_vals), 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_direction,
{ "Direction",
"mac-lte.direction", FT_UINT8, BASE_DEC, VALS(direction_vals), 0x0,
"Direction of message", HFILL
}
},
{ &hf_mac_lte_context_rnti,
{ "RNTI",
"mac-lte.rnti", FT_UINT16, BASE_DEC, 0, 0x0,
"RNTI associated with message", HFILL
}
},
{ &hf_mac_lte_context_rnti_type,
{ "RNTI Type",
"mac-lte.rnti-type", FT_UINT8, BASE_DEC, VALS(rnti_type_vals), 0x0,
"Type of RNTI associated with message", HFILL
}
},
{ &hf_mac_lte_context_ueid,
{ "UEId",
"mac-lte.ueid", FT_UINT16, BASE_DEC, 0, 0x0,
"User Equipment Identifier associated with message", HFILL
}
},
{ &hf_mac_lte_context_sysframe_number,
{ "System Frame Number",
"mac-lte.sfn", FT_UINT16, BASE_DEC, 0, 0x0,
"System Frame Number associated with message", HFILL
}
},
{ &hf_mac_lte_context_subframe_number,
{ "Subframe",
"mac-lte.subframe", FT_UINT16, BASE_DEC, 0, 0x0,
"Subframe number associated with message", HFILL
}
},
{ &hf_mac_lte_context_grant_subframe_number,
{ "Grant Subframe",
"mac-lte.grant-subframe", FT_UINT16, BASE_DEC, 0, 0x0,
"Subframe when grant for this PDU was received", HFILL
}
},
{ &hf_mac_lte_context_predefined_frame,
{ "Predefined frame",
"mac-lte.is-predefined-frame", FT_UINT8, BASE_DEC, VALS(predefined_frame_vals), 0x0,
"Predefined test frame (or real MAC PDU)", HFILL
}
},
{ &hf_mac_lte_context_length,
{ "Length of frame",
"mac-lte.length", FT_UINT8, BASE_DEC, 0, 0x0,
"Original length of frame (including SDUs and padding)", HFILL
}
},
{ &hf_mac_lte_context_ul_grant_size,
{ "Uplink grant size",
"mac-lte.ul-grant-size", FT_UINT8, BASE_DEC, 0, 0x0,
"Uplink grant size (in bytes)", HFILL
}
},
{ &hf_mac_lte_context_bch_transport_channel,
{ "Transport channel",
"mac-lte.bch-transport-channel", FT_UINT8, BASE_DEC, VALS(bch_transport_channel_vals), 0x0,
"Transport channel BCH data was carried on", HFILL
}
},
{ &hf_mac_lte_context_retx_count,
{ "ReTX count",
"mac-lte.retx-count", FT_UINT8, BASE_DEC, 0, 0x0,
"Number of times this PDU has been retransmitted", HFILL
}
},
{ &hf_mac_lte_context_retx_reason,
{ "ReTX reason",
"mac-lte.retx-reason", FT_UINT8, BASE_DEC, VALS(ul_retx_grant_vals), 0x0,
"Type of UL ReTx grant", HFILL
}
},
{ &hf_mac_lte_context_crc_status,
{ "CRC Status",
"mac-lte.crc-status", FT_UINT8, BASE_DEC, VALS(crc_status_vals), 0x0,
"CRC Status as reported by PHY", HFILL
}
},
{ &hf_mac_lte_context_carrier_id,
{ "Carrier Id",
"mac-lte.carrier-id", FT_UINT8, BASE_DEC, VALS(carrier_id_vals), 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_rapid,
{ "RAPID",
"mac-lte.preamble-sent.rapid", FT_UINT8, BASE_DEC, 0, 0x0,
"RAPID sent in RACH preamble", HFILL
}
},
{ &hf_mac_lte_context_rach_attempt_number,
{ "RACH Attempt Number",
"mac-lte.preamble-sent.attempt", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_ues_ul_per_tti,
{ "UL UE in TTI",
"mac-lte.ul-tti-count", FT_UINT8, BASE_DEC, 0, 0x0,
"In this TTI, this is the nth UL grant", HFILL
}
},
{ &hf_mac_lte_ues_dl_per_tti,
{ "DL UE in TTI",
"mac-lte.dl-tti-count", FT_UINT8, BASE_DEC, 0, 0x0,
"In this TTI, this is the nth DL PDU", HFILL
}
},
/* Extra PHY context */
{ &hf_mac_lte_context_phy_ul,
{ "UL PHY attributes",
"mac-lte.ul-phy", FT_STRING, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_ul_modulation_type,
{ "Modulation type",
"mac-lte.ul-phy.modulation-type", FT_UINT8, BASE_DEC, VALS(modulation_type_vals), 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_ul_tbs_index,
{ "TBs Index",
"mac-lte.ul-phy.tbs-index", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_ul_resource_block_length,
{ "Resource Block Length",
"mac-lte.ul-phy.resource-block-length", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_ul_resource_block_start,
{ "Resource Block Start",
"mac-lte.ul-phy.resource-block-start", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_ul_harq_id,
{ "HARQ Id",
"mac-lte.ul-phy.harq-id", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_ul_ndi,
{ "NDI",
"mac-lte.ul-phy.ndi", FT_UINT8, BASE_DEC, 0, 0x0,
"UL New Data Indicator", HFILL
}
},
{ &hf_mac_lte_context_phy_dl,
{ "DL PHY attributes",
"mac-lte.dl-phy", FT_STRING, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_dci_format,
{ "DCI format",
"mac-lte.dl-phy.dci-format", FT_UINT8, BASE_DEC, VALS(dci_format_vals), 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_resource_allocation_type,
{ "Resource Allocation Type",
"mac-lte.dl-phy.resource-allocation-type", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_aggregation_level,
{ "Aggregation Level",
"mac-lte.dl-phy.aggregation-level", FT_UINT8, BASE_DEC, VALS(aggregation_level_vals), 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_mcs_index,
{ "MCS Index",
"mac-lte.dl-phy.mcs-index", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_redundancy_version_index,
{ "RV Index",
"mac-lte.dl-phy.rv-index", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_retx,
{ "DL Retx",
"mac-lte.dl-phy.dl-retx", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_resource_block_length,
{ "RB Length",
"mac-lte.dl-phy.rb-length", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_crc_status,
{ "CRC Status",
"mac-lte.dl-phy.crc-status", FT_UINT8, BASE_DEC, VALS(crc_status_vals), 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_harq_id,
{ "HARQ Id",
"mac-lte.dl-phy.harq-id", FT_UINT8, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_context_phy_dl_ndi,
{ "NDI",
"mac-lte.dl-phy.ndi", FT_UINT8, BASE_DEC, 0, 0x0,
"New Data Indicator", HFILL
}
},
{ &hf_mac_lte_context_phy_dl_tb,
{ "TB",
"mac-lte.dl-phy.tb", FT_UINT8, BASE_DEC, 0, 0x0,
"Transport Block (antenna #)", HFILL
}
},
/* Out-of-band events */
{ &hf_mac_lte_oob_send_preamble,
{ "PRACH",
"mac-lte.preamble-sent", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_number_of_srs,
{ "Number of SRs",
"mac-lte.sr-req.count", FT_UINT32, BASE_DEC, 0, 0x0,
"Number of UEs doing SR in this frame", HFILL
}
},
/*******************************************/
/* MAC shared channel header fields */
{ &hf_mac_lte_ulsch,
{ "UL-SCH",
"mac-lte.ulsch", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_ulsch_header,
{ "UL-SCH Header",
"mac-lte.ulsch.header", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_dlsch_header,
{ "DL-SCH Header",
"mac-lte.dlsch.header", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_dlsch,
{ "DL-SCH",
"mac-lte.dlsch", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_sch_subheader,
{ "SCH sub-header",
"mac-lte.sch.subheader", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_mch,
{ "MCH",
"mac-lte.mch", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_mch_header,
{ "MCH Header",
"mac-lte.mch.header", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_mch_subheader,
{ "MCH sub-header",
"mac-lte.mch.subheader", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_sch_reserved,
{ "SCH reserved bits",
"mac-lte.sch.reserved", FT_UINT8, BASE_HEX, NULL, 0xc0,
NULL, HFILL
}
},
{ &hf_mac_lte_sch_extended,
{ "Extension",
"mac-lte.sch.extended", FT_UINT8, BASE_HEX, 0, 0x20,
"Extension - i.e. further headers after this one", HFILL
}
},
{ &hf_mac_lte_dlsch_lcid,
{ "LCID",
"mac-lte.dlsch.lcid", FT_UINT8, BASE_HEX, VALS(dlsch_lcid_vals), 0x1f,
"DL-SCH Logical Channel Identifier", HFILL
}
},
{ &hf_mac_lte_ulsch_lcid,
{ "LCID",
"mac-lte.ulsch.lcid", FT_UINT8, BASE_HEX, VALS(ulsch_lcid_vals), 0x1f,
"UL-SCH Logical Channel Identifier", HFILL
}
},
{ &hf_mac_lte_sch_format,
{ "Format",
"mac-lte.sch.format", FT_UINT8, BASE_HEX, VALS(format_vals), 0x80,
NULL, HFILL
}
},
{ &hf_mac_lte_sch_length,
{ "Length",
"mac-lte.sch.length", FT_UINT16, BASE_DEC, 0, 0x0,
"Length of MAC SDU or MAC control element", HFILL
}
},
{ &hf_mac_lte_mch_reserved,
{ "MCH reserved bits",
"mac-lte.mch.reserved", FT_UINT8, BASE_HEX, NULL, 0xc0,
NULL, HFILL
}
},
{ &hf_mac_lte_mch_extended,
{ "Extension",
"mac-lte.mch.extended", FT_UINT8, BASE_HEX, 0, 0x20,
"Extension - i.e. further headers after this one", HFILL
}
},
{ &hf_mac_lte_mch_lcid,
{ "LCID",
"mac-lte.mch.lcid", FT_UINT8, BASE_HEX, VALS(mch_lcid_vals), 0x1f,
"MCH Logical Channel Identifier", HFILL
}
},
{ &hf_mac_lte_mch_format,
{ "Format",
"mac-lte.mch.format", FT_UINT8, BASE_HEX, VALS(format_vals), 0x80,
NULL, HFILL
}
},
{ &hf_mac_lte_mch_length,
{ "Length",
"mac-lte.mch.length", FT_UINT16, BASE_DEC, 0, 0x0,
"Length of MAC SDU or MAC control element", HFILL
}
},
{ &hf_mac_lte_sch_header_only,
{ "MAC PDU Header only",
"mac-lte.sch.header-only", FT_UINT8, BASE_DEC, VALS(header_only_vals), 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_mch_header_only,
{ "MAC PDU Header only",
"mac-lte.mch.header-only", FT_UINT8, BASE_DEC, VALS(header_only_vals), 0x0,
NULL, HFILL
}
},
/********************************/
/* Data */
{ &hf_mac_lte_sch_sdu,
{ "SDU",
"mac-lte.sch.sdu", FT_BYTES, BASE_NONE, 0, 0x0,
"Shared channel SDU", HFILL
}
},
{ &hf_mac_lte_mch_sdu,
{ "SDU",
"mac-lte.mch.sdu", FT_BYTES, BASE_NONE, 0, 0x0,
"Multicast channel SDU", HFILL
}
},
{ &hf_mac_lte_bch_pdu,
{ "BCH PDU",
"mac-lte.bch.pdu", FT_BYTES, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_pch_pdu,
{ "PCH PDU",
"mac-lte.pch.pdu", FT_BYTES, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_predefined_pdu,
{ "Predefined data",
"mac-lte.predefined-data", FT_BYTES, BASE_NONE, 0, 0x0,
"Predefined test data", HFILL
}
},
{ &hf_mac_lte_raw_pdu,
{ "Raw data",
"mac-lte.raw-data", FT_BYTES, BASE_NONE, 0, 0x0,
"Raw bytes of PDU (e.g. if CRC error)", HFILL
}
},
{ &hf_mac_lte_padding_data,
{ "Padding data",
"mac-lte.padding-data", FT_BYTES, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_padding_length,
{ "Padding length",
"mac-lte.padding-length", FT_INT32, BASE_DEC, 0, 0x0,
"Length of padding data not included at end of frame", HFILL
}
},
/*********************************/
/* RAR fields */
{ &hf_mac_lte_rar,
{ "RAR",
"mac-lte.rar", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_headers,
{ "RAR Headers",
"mac-lte.rar.headers", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_header,
{ "RAR Header",
"mac-lte.rar.header", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_extension,
{ "Extension",
"mac-lte.rar.e", FT_UINT8, BASE_HEX, 0, 0x80,
"Extension - i.e. further RAR headers after this one", HFILL
}
},
{ &hf_mac_lte_rar_t,
{ "Type",
"mac-lte.rar.t", FT_UINT8, BASE_HEX, VALS(rar_type_vals), 0x40,
"Type field indicating whether the payload is RAPID or BI", HFILL
}
},
{ &hf_mac_lte_rar_bi,
{ "BI",
"mac-lte.rar.bi", FT_UINT8, BASE_HEX, VALS(rar_bi_vals), 0x0f,
"Backoff Indicator (ms)", HFILL
}
},
{ &hf_mac_lte_rar_rapid,
{ "RAPID",
"mac-lte.rar.rapid", FT_UINT8, BASE_HEX_DEC, 0, 0x3f,
"Random Access Preamble IDentifier", HFILL
}
},
{ &hf_mac_lte_rar_no_of_rapids,
{ "Number of RAPIDs",
"mac-lte.rar.no-of-rapids", FT_UINT8, BASE_DEC, 0, 0x0,
"Number of RAPIDs in RAR PDU", HFILL
}
},
{ &hf_mac_lte_rar_reserved,
{ "Reserved",
"mac-lte.rar.reserved", FT_UINT8, BASE_HEX, 0, 0x30,
"Reserved bits in RAR header - should be 0", HFILL
}
},
{ &hf_mac_lte_rar_body,
{ "RAR Body",
"mac-lte.rar.body", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_reserved2,
{ "Reserved",
"mac-lte.rar.reserved2", FT_UINT8, BASE_HEX, 0, 0x80,
"Reserved bit in RAR body - should be 0", HFILL
}
},
{ &hf_mac_lte_rar_ta,
{ "Timing Advance",
"mac-lte.rar.ta", FT_UINT16, BASE_DEC, 0, 0x7ff0,
"Required adjustment to uplink transmission timing", HFILL
}
},
{ &hf_mac_lte_rar_ul_grant,
{ "UL Grant",
"mac-lte.rar.ul-grant", FT_UINT24, BASE_DEC, 0, 0x0fffff,
"Size of UL Grant", HFILL
}
},
{ &hf_mac_lte_rar_ul_grant_hopping,
{ "Hopping Flag",
"mac-lte.rar.ul-grant.hopping", FT_UINT8, BASE_DEC, 0, 0x08,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_ul_grant_fsrba,
{ "Fixed sized resource block assignment",
"mac-lte.rar.ul-grant.fsrba", FT_UINT16, BASE_DEC, 0, 0x07fe,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_ul_grant_tmcs,
{ "Truncated Modulation and coding scheme",
"mac-lte.rar.ul-grant.tmcs", FT_UINT16, BASE_DEC, 0, 0x01e0,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_ul_grant_tcsp,
{ "TPC command for scheduled PUSCH",
"mac-lte.rar.ul-grant.tcsp", FT_UINT8, BASE_DEC, 0, 0x01c,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_ul_grant_ul_delay,
{ "UL Delay",
"mac-lte.rar.ul-grant.ul-delay", FT_UINT8, BASE_DEC, 0, 0x02,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_ul_grant_cqi_request,
{ "CQI Request",
"mac-lte.rar.ul-grant.cqi-request", FT_UINT8, BASE_DEC, 0, 0x01,
NULL, HFILL
}
},
{ &hf_mac_lte_rar_temporary_crnti,
{ "Temporary C-RNTI",
"mac-lte.rar.temporary-crnti", FT_UINT16, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
/**********************/
/* Control PDU fields */
{ &hf_mac_lte_control_bsr,
{ "BSR",
"mac-lte.control.bsr", FT_STRING, BASE_NONE, 0, 0x0,
"Buffer Status Report", HFILL
}
},
{ &hf_mac_lte_control_bsr_lcg_id,
{ "Logical Channel Group ID",
"mac-lte.control.bsr.lcg-id", FT_UINT8, BASE_DEC, 0, 0xc0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_short_bsr_buffer_size,
{ "Buffer Size",
"mac-lte.control.bsr.buffer-size", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &buffer_size_vals_ext, 0x3f,
"Buffer Size available in all channels in group", HFILL
}
},
{ &hf_mac_lte_control_long_bsr_buffer_size_0,
{ "Buffer Size 0",
"mac-lte.control.bsr.buffer-size-0", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &buffer_size_vals_ext, 0xfc,
"Buffer Size available in logical channel group 0", HFILL
}
},
{ &hf_mac_lte_control_long_bsr_buffer_size_1,
{ "Buffer Size 1",
"mac-lte.control.bsr.buffer-size-1", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &buffer_size_vals_ext, 0x03f0,
"Buffer Size available in logical channel group 1", HFILL
}
},
{ &hf_mac_lte_control_long_bsr_buffer_size_2,
{ "Buffer Size 2",
"mac-lte.control.bsr.buffer-size-2", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &buffer_size_vals_ext, 0x0fc0,
"Buffer Size available in logical channel group 2", HFILL
}
},
{ &hf_mac_lte_control_long_bsr_buffer_size_3,
{ "Buffer Size 3",
"mac-lte.control.bsr.buffer-size-3", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &buffer_size_vals_ext, 0x3f,
"Buffer Size available in logical channel group 3", HFILL
}
},
{ &hf_mac_lte_control_short_ext_bsr_buffer_size,
{ "Buffer Size",
"mac-lte.control.bsr.buffer-size", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &ext_buffer_size_vals_ext, 0x3f,
"Buffer Size available in all channels in group", HFILL
}
},
{ &hf_mac_lte_control_long_ext_bsr_buffer_size_0,
{ "Buffer Size 0",
"mac-lte.control.bsr.buffer-size-0", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &ext_buffer_size_vals_ext, 0xfc,
"Buffer Size available in logical channel group 0", HFILL
}
},
{ &hf_mac_lte_control_long_ext_bsr_buffer_size_1,
{ "Buffer Size 1",
"mac-lte.control.bsr.buffer-size-1", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &ext_buffer_size_vals_ext, 0x03f0,
"Buffer Size available in logical channel group 1", HFILL
}
},
{ &hf_mac_lte_control_long_ext_bsr_buffer_size_2,
{ "Buffer Size 2",
"mac-lte.control.bsr.buffer-size-2", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &ext_buffer_size_vals_ext, 0x0fc0,
"Buffer Size available in logical channel group 2", HFILL
}
},
{ &hf_mac_lte_control_long_ext_bsr_buffer_size_3,
{ "Buffer Size 3",
"mac-lte.control.bsr.buffer-size-3", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &ext_buffer_size_vals_ext, 0x3f,
"Buffer Size available in logical channel group 3", HFILL
}
},
{ &hf_mac_lte_control_crnti,
{ "C-RNTI",
"mac-lte.control.crnti", FT_UINT16, BASE_DEC, 0, 0x0,
"C-RNTI for the UE", HFILL
}
},
{ &hf_mac_lte_control_timing_advance,
{ "Timing Advance",
"mac-lte.control.timing-advance", FT_STRING, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_timing_advance_group_id,
{ "Timing Advance Group Identity",
"mac-lte.control.timing-advance.group-id", FT_UINT8, BASE_DEC, 0, 0xc0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_timing_advance_command,
{ "Timing Advance Command",
"mac-lte.control.timing-advance.command", FT_UINT8, BASE_DEC, 0, 0x3f,
"Timing Advance (0-63 - see 36.213, 4.2.3)", HFILL
}
},
{ &hf_mac_lte_control_ue_contention_resolution,
{ "UE Contention Resolution",
"mac-lte.control.ue-contention-resolution", FT_STRING, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_ue_contention_resolution_identity,
{ "UE Contention Resolution Identity",
"mac-lte.control.ue-contention-resolution.identity", FT_BYTES, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_ue_contention_resolution_msg3,
{ "Msg3",
"mac-lte.control.ue-contention-resolution.msg3", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_ue_contention_resolution_msg3_matched,
{ "UE Contention Resolution Matches Msg3",
"mac-lte.control.ue-contention-resolution.matches-msg3", FT_BOOLEAN, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_ue_contention_resolution_time_since_msg3,
{ "Time since Msg3",
"mac-lte.control.ue-contention-resolution.time-since-msg3", FT_UINT32, BASE_DEC, 0, 0x0,
"Time in ms since corresponding Msg3", HFILL
}
},
{ &hf_mac_lte_control_power_headroom,
{ "Power Headroom",
"mac-lte.control.power-headroom", FT_STRING, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_power_headroom_reserved,
{ "Reserved",
"mac-lte.control.power-headroom.reserved", FT_UINT8, BASE_DEC, 0, 0xc0,
"Reserved bits, should be 0", HFILL
}
},
{ &hf_mac_lte_control_power_headroom_level,
{ "Power Headroom Level",
"mac-lte.control.power-headroom.level", FT_UINT8, BASE_DEC|BASE_EXT_STRING,
&power_headroom_vals_ext, 0x3f, "Power Headroom Level in dB", HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom,
{ "Extended Power Headroom",
"mac-lte.control.ext-power-headroom", FT_STRING, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_c7,
{ "SCell Index 7 Power Headroom",
"mac-lte.control.ext-power-headroom.c7", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_ph_vals), 0x80, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_c6,
{ "SCell Index 6 Power Headroom",
"mac-lte.control.ext-power-headroom.c6", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_ph_vals), 0x40, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_c5,
{ "SCell Index 5 Power Headroom",
"mac-lte.control.ext-power-headroom.c5", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_ph_vals), 0x20, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_c4,
{ "SCell Index 4 Power Headroom",
"mac-lte.control.ext-power-headroom.c4", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_ph_vals), 0x10, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_c3,
{ "SCell Index 3 Power Headroom",
"mac-lte.control.ext-power-headroom.c3", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_ph_vals), 0x08, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_c2,
{ "SCell Index 2 Power Headroom",
"mac-lte.control.ext-power-headroom.c2", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_ph_vals), 0x04, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_c1,
{ "SCell Index 1 Power Headroom",
"mac-lte.control.ext-power-headroom.c1", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_ph_vals), 0x02, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_reserved,
{ "Reserved",
"mac-lte.control.ext-power-headroom.reserved", FT_UINT8, BASE_DEC,
0, 0x01, "Reserved bit, should be 0", HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_power_backoff,
{ "Power Backoff",
"mac-lte.control.ext-power-headroom.power-backoff", FT_BOOLEAN, 8,
TFS(&mac_lte_power_backoff_vals), 0x80, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_value,
{ "Power Headroom Value",
"mac-lte.control.ext-power-headroom.power-headroom-value", FT_BOOLEAN, 8,
TFS(&mac_lte_ph_value_vals), 0x40, NULL, HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_level,
{ "Power Headroom Level",
"mac-lte.control.ext-power-headroom.level", FT_UINT8, BASE_DEC|BASE_EXT_STRING,
&power_headroom_vals_ext, 0x3f, "Power Headroom Level in dB", HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_reserved2,
{ "Reserved",
"mac-lte.control.ext-power-headroom.reserved2", FT_UINT8, BASE_DEC,
0, 0xc0, "Reserved bits, should be 0", HFILL
}
},
{ &hf_mac_lte_control_ext_power_headroom_pcmaxc,
{ "Configured UE Transmit Power",
"mac-lte.control.ext-power-headroom.pcmaxc", FT_UINT8, BASE_DEC|BASE_EXT_STRING,
&pcmaxc_vals_ext, 0x3f, "Pcmax,c in dBm", HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation,
{ "Activation/Deactivation",
"mac-lte.control.activation-deactivation", FT_STRING, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_c7,
{ "SCell Index 7 Status",
"mac-lte.control.activation-deactivation.c7", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_status_vals), 0x80, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_c6,
{ "SCell Index 6 Status",
"mac-lte.control.activation-deactivation.c6", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_status_vals), 0x40, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_c5,
{ "SCell Index 5 Status",
"mac-lte.control.activation-deactivation.c5", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_status_vals), 0x20, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_c4,
{ "SCell Index 4 Status",
"mac-lte.control.activation-deactivation.c4", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_status_vals), 0x10, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_c3,
{ "SCell Index 3 Status",
"mac-lte.control.activation-deactivation.c3", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_status_vals), 0x08, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_c2,
{ "SCell Index 2 Status",
"mac-lte.control.activation-deactivation.c2", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_status_vals), 0x04, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_c1,
{ "SCell Index 1 Status",
"mac-lte.control.activation-deactivation.c1", FT_BOOLEAN, 8,
TFS(&mac_lte_scell_status_vals), 0x02, NULL, HFILL
}
},
{ &hf_mac_lte_control_activation_deactivation_reserved,
{ "Reserved",
"mac-lte.control.activation-deactivation.reserved", FT_UINT8, BASE_DEC,
0, 0x01, "Reserved bit, should be 0", HFILL
}
},
{ &hf_mac_lte_control_mch_scheduling_info,
{ "MCH Scheduling Information",
"mac-lte.control.mch_scheduling_info", FT_STRING, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_control_mch_scheduling_info_lcid,
{ "LCID",
"mac-lte.control.mch_scheduling_info.lcid", FT_UINT8, BASE_HEX, VALS(mch_lcid_vals), 0xf8,
"Logical Channel ID of the MTCH", HFILL
}
},
{ &hf_mac_lte_control_mch_scheduling_info_stop_mtch,
{ "Stop MTCH",
"mac-lte.control.mch_scheduling_info.stop_mtch", FT_UINT16, BASE_DEC, 0, 0x07ff,
"Ordinal number of the subframe where the corresponding MTCH stops", HFILL
}
},
/* Generated fields */
{ &hf_mac_lte_dl_harq_resend_original_frame,
{ "Frame with previous tx",
"mac-lte.dlsch.retx.original-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_dl_harq_resend_time_since_previous_frame,
{ "Time since previous tx (ms)",
"mac-lte.dlsch.retx.time-since-previous", FT_UINT16, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_dl_harq_resend_next_frame,
{ "Frame with next tx",
"mac-lte.dlsch.retx.next-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_dl_harq_resend_time_until_next_frame,
{ "Time until next tx (ms)",
"mac-lte.dlsch.retx.time-until-next", FT_UINT16, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_ul_harq_resend_original_frame,
{ "Frame with previous tx",
"mac-lte.ulsch.retx.original-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_ul_harq_resend_time_since_previous_frame,
{ "Time since previous tx (ms)",
"mac-lte.ulsch.retx.time-since-previous", FT_UINT16, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_ul_harq_resend_next_frame,
{ "Frame with next tx",
"mac-lte.ulsch.retx.next-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_ul_harq_resend_time_until_next_frame,
{ "Time until next tx (ms)",
"mac-lte.ulsch.retx.time-until-next", FT_UINT16, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_grant_answering_sr,
{ "First Grant Following SR from",
"mac-lte.ulsch.grant-answering-sr", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_failure_answering_sr,
{ "SR which failed",
"mac-lte.ulsch.failure-answering-sr", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_sr_leading_to_failure,
{ "This SR fails",
"mac-lte.ulsch.failure-answering-sr-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_sr_leading_to_grant,
{ "This SR results in a grant here",
"mac-lte.ulsch.grant-answering-sr-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_sr_time_since_request,
{ "Time since SR (ms)",
"mac-lte.ulsch.time-since-sr", FT_UINT32, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_sr_time_until_answer,
{ "Time until answer (ms)",
"mac-lte.ulsch.time-until-sr-answer", FT_UINT32, BASE_DEC, 0, 0x0,
NULL, HFILL
}
},
{ &hf_mac_lte_drx_config,
{ "DRX Configuration",
"mac-lte.drx-config", FT_STRING, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_frame_num,
{ "Config Frame",
"mac-lte.drx-config.config-frame", FT_FRAMENUM, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_previous_frame_num,
{ "Previous Config Frame",
"mac-lte.drx-config.previous-config-frame", FT_FRAMENUM, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_long_cycle,
{ "Long cycle",
"mac-lte.drx-config.long-cycle", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_cycle_offset,
{ "Cycle offset",
"mac-lte.drx-config.cycle-offset", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_onduration_timer,
{ "OnDuration Timer",
"mac-lte.drx-config.onduration-timer", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_inactivity_timer,
{ "Inactivity Timer",
"mac-lte.drx-config.inactivity-timer", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_retransmission_timer,
{ "Retransmission Timer",
"mac-lte.drx-config.retransmission-timer", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_short_cycle,
{ "Short cycle",
"mac-lte.drx-config.short-cycle", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_config_short_cycle_timer,
{ "Short cycle Timer",
"mac-lte.drx-config.short-cycle-timer", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state,
{ "DRX State",
"mac-lte.drx-state", FT_STRING, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_long_cycle_offset,
{ "Long cycle offset",
"mac-lte.drx-state.long-cycle-offset", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_long_cycle_on,
{ "Long cycle current on",
"mac-lte.drx-state.long-cycle-on", FT_BOOLEAN, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_short_cycle_offset,
{ "Short cycle offset",
"mac-lte.drx-state.short-cycle-offset", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_short_cycle_on,
{ "Short cycle current on",
"mac-lte.drx-state.short-cycle-on", FT_BOOLEAN, BASE_NONE,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_inactivity_remaining,
{ "Inactivity remaining",
"mac-lte.drx-state.inactivity-remaining", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_onduration_remaining,
{ "Onduration remaining",
"mac-lte.drx-state.onduration-remaining", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_retransmission_remaining,
{ "Retransmission remaining",
"mac-lte.drx-state.retransmission-remaining", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_rtt_remaining,
{ "RTT remaining",
"mac-lte.drx-state.rtt-remaining", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
{ &hf_mac_lte_drx_state_short_cycle_remaining,
{ "Short-cycle timer remaining",
"mac-lte.drx-state.short-cycle-remaining", FT_UINT16, BASE_DEC,
0, 0x0, NULL, HFILL
}
},
};
static gint *ett[] =
{
&ett_mac_lte,
&ett_mac_lte_context,
&ett_mac_lte_phy_context,
&ett_mac_lte_rar_headers,
&ett_mac_lte_rar_header,
&ett_mac_lte_rar_body,
&ett_mac_lte_rar_ul_grant,
&ett_mac_lte_ulsch_header,
&ett_mac_lte_dlsch_header,
&ett_mac_lte_mch_header,
&ett_mac_lte_sch_subheader,
&ett_mac_lte_mch_subheader,
&ett_mac_lte_bch,
&ett_mac_lte_bsr,
&ett_mac_lte_pch,
&ett_mac_lte_activation_deactivation,
&ett_mac_lte_contention_resolution,
&ett_mac_lte_timing_advance,
&ett_mac_lte_power_headroom,
&ett_mac_lte_extended_power_headroom,
&ett_mac_lte_extended_power_headroom_cell,
&ett_mac_lte_mch_scheduling_info,
&ett_mac_lte_oob,
&ett_mac_lte_drx_config,
&ett_mac_lte_drx_state
};
static ei_register_info ei[] = {
{ &ei_mac_lte_reserved_not_zero, { "mac-lte.reserved-not-zero", PI_MALFORMED, PI_ERROR, "Reserved bit not zero", EXPFILL }},
{ &ei_mac_lte_rar_timing_advance_not_zero_note, { "mac-lte.rar.ta.not-zero", PI_SEQUENCE, PI_NOTE, "RAR Timing advance not zero", EXPFILL }},
{ &ei_mac_lte_rar_timing_advance_not_zero_warn, { "mac-lte.rar.ta.not-zero", PI_SEQUENCE, PI_WARN, "RAR Timing advance not zero", EXPFILL }},
{ &ei_mac_lte_rar_bi_present, { "mac-lte.rar.bi.present", PI_MALFORMED, PI_ERROR, "MAC RAR PDU has > 1 Backoff Indicator subheader present", EXPFILL }},
{ &ei_mac_lte_rar_bi_not_first_subheader, { "mac-lte.rar.bi.not-first-subheader", PI_MALFORMED, PI_WARN, "Backoff Indicator must appear as first subheader", EXPFILL }},
{ &ei_mac_lte_bch_pdu, { "mac-lte.bch.pdu.uplink", PI_MALFORMED, PI_ERROR, "BCH data should not be received in Uplink!", EXPFILL }},
{ &ei_mac_lte_pch_pdu, { "mac-lte.pch.pdu.uplink", PI_MALFORMED, PI_ERROR, "PCH data should not be received in Uplink!", EXPFILL }},
{ &ei_mac_lte_orig_tx_ul_frame_not_found, { "mac-lte.orig-tx-ul-frame-not-found", PI_SEQUENCE, PI_ERROR, "Original Tx of UL frame not found", EXPFILL }},
{ &ei_mac_lte_ul_harq_resend_next_frame, { "mac-lte.ulsch.retx.next-frame.expert", PI_SEQUENCE, PI_WARN, "UL MAC PDU needed to be retransmitted", EXPFILL }},
{ &ei_mac_lte_sr_results_not_grant_or_failure_indication, { "mac-lte.sr_results-not-grant-or-failure-indication", PI_SEQUENCE, PI_ERROR, "SR results in neither a grant nor a failure indication", EXPFILL }},
{ &ei_mac_lte_sr_invalid_event, { "mac-lte.ulsch.sr-invalid-event", PI_SEQUENCE, PI_ERROR, "Invalid SR event for UE", EXPFILL }},
{ &ei_mac_lte_dlsch_lcid, { "mac-lte.dlsch.lcid.DRX-received", PI_SEQUENCE, PI_NOTE, "DRX command received for UE", EXPFILL }},
{ &ei_mac_lte_control_subheader_after_data_subheader, { "mac-lte.control-subheader-after-data-subheader", PI_MALFORMED, PI_ERROR, "?L-SCH Control subheaders should not appear after data subheaders", EXPFILL }},
{ &ei_mac_lte_control_bsr_multiple, { "mac-lte.control.bsr.multiple", PI_MALFORMED, PI_ERROR, "There shouldn't be > 1 BSR in a frame", EXPFILL }},
{ &ei_mac_lte_padding_data_multiple, { "mac-lte.padding-data.multiple", PI_MALFORMED, PI_WARN, "Should not see more than 2 padding subheaders in one frame", EXPFILL }},
{ &ei_mac_lte_padding_data_before_control_subheader, { "mac-lte.padding-data.before-control-subheader", PI_MALFORMED, PI_ERROR, "Padding should come before other control subheaders!", EXPFILL }},
{ &ei_mac_lte_padding_data_start_and_end, { "mac-lte.padding-data.start-and-end", PI_MALFORMED, PI_ERROR, "Padding subheaders at start and end!", EXPFILL }},
{ &ei_mac_lte_lcid_unexpected, { "mac-lte.lcid-unexpected", PI_MALFORMED, PI_ERROR, "?L-SCH: Unexpected LCID received", EXPFILL }},
{ &ei_mac_lte_too_many_subheaders, { "mac-lte.too-many-subheaders", PI_MALFORMED, PI_ERROR, "Reached too many subheaders - frame obviously malformed", EXPFILL }},
{ &ei_mac_lte_control_ue_contention_resolution_msg3_matched, { "mac-lte.control.ue-contention-resolution.matches-msg3.not", PI_SEQUENCE, PI_WARN, "CR body in Msg4 doesn't match Msg3 CCCH in frame X", EXPFILL }},
{ &ei_mac_lte_control_timing_advance_command_no_correction, { "mac-lte.control.timing-advance.command.no-correction", PI_SEQUENCE, PI_NOTE, "Timing Advance control element received (no correction needed)", EXPFILL }},
{ &ei_mac_lte_control_timing_advance_command_correction_needed, { "mac-lte.control.timing-advance.correction-needed", PI_SEQUENCE, PI_WARN, "Timing Advance control element received with correction needed", EXPFILL }},
{ &ei_mac_lte_control_element_size_invalid, { "mac-lte.control-element.size-invalid", PI_MALFORMED, PI_ERROR, "Control Element has an unexpected size", EXPFILL }},
{ &ei_mac_lte_bsr_warn_threshold_exceeded, { "mac-lte.bsr-warn-threshold-exceeded", PI_SEQUENCE, PI_WARN, "BSR for LCG X exceeds threshold", EXPFILL }},
{ &ei_mac_lte_sch_header_only, { "mac-lte.sch.header-only", PI_SEQUENCE, PI_NOTE, "MAC PDU SDUs have been omitted", EXPFILL }},
{ &ei_mac_lte_context_length, { "mac-lte.length.invalid", PI_MALFORMED, PI_ERROR, "MAC PDU is longer than reported length", EXPFILL }},
{ &ei_mac_lte_rach_preamble_sent_warn, { "mac-lte.rach-preamble-sent", PI_SEQUENCE, PI_WARN, "RACH Preamble sent", EXPFILL }},
{ &ei_mac_lte_rach_preamble_sent_note, { "mac-lte.rach-preamble-sent", PI_SEQUENCE, PI_NOTE, "RACH Preamble sent", EXPFILL }},
{ &ei_mac_lte_oob_send_sr, { "mac-lte.sr-req", PI_SEQUENCE, PI_NOTE, "Scheduling Request sent", EXPFILL }},
{ &ei_mac_lte_oob_sr_failure, { "mac-lte.sr-failure", PI_SEQUENCE, PI_ERROR, "Scheduling Request failed", EXPFILL }},
{ &ei_mac_lte_context_sysframe_number, { "mac-lte.sfn.out-of-range", PI_MALFORMED, PI_ERROR, "Sysframe number out of range", EXPFILL }},
{ &ei_mac_lte_context_rnti_type, { "mac-lte.rnti-type.invalid", PI_MALFORMED, PI_ERROR, "RNTI indicated, but value is not correct", EXPFILL }},
{ &ei_mac_lte_ul_mac_frame_retx, { "mac-lte.ul-mac-frame-retx", PI_SEQUENCE, PI_WARN, "UL MAC frame ReTX", EXPFILL }},
{ &ei_mac_lte_context_crc_status, { "mac-lte.crc-status.error", PI_MALFORMED, PI_ERROR, "Frame has CRC error problem", EXPFILL }},
};
static const enum_val_t show_info_col_vals[] = {
{"show-phy", "PHY Info", ShowPHYLayer},
{"show-mac", "MAC Info", ShowMACLayer},
{"show-rlc", "RLC Info", ShowRLCLayer},
{NULL, NULL, -1}
};
static const enum_val_t lcid_drb_source_vals[] = {
{"from-static-stable", "From static table", FromStaticTable},
{"from-configuration-protocol", "From configuration protocol", FromConfigurationProtocol},
{NULL, NULL, -1}
};
module_t *mac_lte_module;
expert_module_t* expert_mac_lte;
static uat_field_t lcid_drb_mapping_flds[] = {
UAT_FLD_VS(lcid_drb_mappings, lcid, "lcid", drb_lcid_vals, "The MAC LCID"),
UAT_FLD_DEC(lcid_drb_mappings, drbid,"drb id (1-32)", "Identifier of logical data channel"),
UAT_FLD_VS(lcid_drb_mappings, channel_type, "RLC Channel Type", rlc_channel_type_vals, "The MAC LCID"),
UAT_END_FIELDS
};
/* Register protocol. */
proto_mac_lte = proto_register_protocol("MAC-LTE", "MAC-LTE", "mac-lte");
proto_register_field_array(proto_mac_lte, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_mac_lte = expert_register_protocol(proto_mac_lte);
expert_register_field_array(expert_mac_lte, ei, array_length(ei));
/* Allow other dissectors to find this one by name. */
register_dissector("mac-lte", dissect_mac_lte, proto_mac_lte);
/* Register the tap name */
mac_lte_tap = register_tap("mac-lte");
/* Preferences */
mac_lte_module = prefs_register_protocol(proto_mac_lte, NULL);
/* Obsolete preferences */
prefs_register_obsolete_preference(mac_lte_module, "single_rar");
prefs_register_obsolete_preference(mac_lte_module, "check_reserved_bits");
prefs_register_obsolete_preference(mac_lte_module, "decode_rar_ul_grant");
prefs_register_obsolete_preference(mac_lte_module, "show_rlc_info_column");
prefs_register_obsolete_preference(mac_lte_module, "attempt_to_detect_dl_harq_resend");
prefs_register_obsolete_preference(mac_lte_module, "attempt_to_track_ul_harq_resend");
prefs_register_uint_preference(mac_lte_module, "retx_count_warn",
"Number of Re-Transmits before expert warning triggered",
"Number of Re-Transmits before expert warning triggered",
10, &global_mac_lte_retx_counter_trigger);
prefs_register_bool_preference(mac_lte_module, "attempt_rrc_decode",
"Attempt to decode BCH, PCH and CCCH data using LTE RRC dissector",
"Attempt to decode BCH, PCH and CCCH data using LTE RRC dissector",
&global_mac_lte_attempt_rrc_decode);
prefs_register_bool_preference(mac_lte_module, "attempt_to_dissect_crc_failures",
"Dissect frames that have failed CRC check",
"Attempt to dissect frames that have failed CRC check",
&global_mac_lte_dissect_crc_failures);
prefs_register_bool_preference(mac_lte_module, "heuristic_mac_lte_over_udp",
"Try Heuristic LTE-MAC over UDP framing",
"When enabled, use heuristic dissector to find MAC-LTE frames sent with "
"UDP framing",
&global_mac_lte_heur);
prefs_register_bool_preference(mac_lte_module, "attempt_to_dissect_srb_sdus",
"Attempt to dissect LCID 1&2 as srb1&2",
"Will call LTE RLC dissector with standard settings as per RRC spec",
&global_mac_lte_attempt_srb_decode);
prefs_register_bool_preference(mac_lte_module, "attempt_to_dissect_mcch",
"Attempt to dissect MCH LCID 0 as MCCH",
"Will call LTE RLC dissector for MCH LCID 0",
&global_mac_lte_attempt_mcch_decode);
prefs_register_bool_preference(mac_lte_module, "call_rlc_for_mtch",
"Call RLC dissector MTCH LCIDs",
"Call RLC dissector MTCH LCIDs",
&global_mac_lte_call_rlc_for_mtch);
prefs_register_enum_preference(mac_lte_module, "lcid_to_drb_mapping_source",
"Source of LCID -> drb channel settings",
"Set whether LCID -> drb Table is taken from static table (below) or from "
"info learned from control protocol (e.g. RRC)",
&global_mac_lte_lcid_drb_source, lcid_drb_source_vals, FALSE);
lcid_drb_mappings_uat = uat_new("Static LCID -> drb Table",
sizeof(lcid_drb_mapping_t),
"drb_logchans",
TRUE,
(void**) &lcid_drb_mappings,
&num_lcid_drb_mappings,
UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
"", /* TODO: is this ref to help manual? */
lcid_drb_mapping_copy_cb,
NULL,
NULL,
NULL,
lcid_drb_mapping_flds );
prefs_register_uat_preference(mac_lte_module,
"drb_table",
"LCID -> DRB Mappings Table",
"A table that maps from configurable lcids -> RLC logical channels",
lcid_drb_mappings_uat);
prefs_register_uint_preference(mac_lte_module, "bsr_warn_threshold",
"BSR size when warning should be issued (0 - 63)",
"If any BSR report is >= this number, an expert warning will be added",
10, &global_mac_lte_bsr_warn_threshold);
prefs_register_bool_preference(mac_lte_module, "track_sr",
"Track status of SRs within UEs",
"Track status of SRs, providing links between requests, failure indications and grants",
&global_mac_lte_track_sr);
prefs_register_enum_preference(mac_lte_module, "layer_to_show",
"Which layer info to show in Info column",
"Can show PHY, MAC or RLC layer info in Info column",
&global_mac_lte_layer_to_show, show_info_col_vals, FALSE);
prefs_register_bool_preference(mac_lte_module, "decode_cr_body",
"Decode CR body as UL CCCH",
"Attempt to decode 6 bytes of Contention Resolution body as an UL CCCH PDU",
&global_mac_lte_decode_cr_body);
prefs_register_bool_preference(mac_lte_module, "show_drx",
"Show DRX Information (Incomplete/experimental!)",
"Apply DRX config and show DRX state within each UE",
&global_mac_lte_show_drx);
register_init_routine(&mac_lte_init_protocol);
}
void proto_reg_handoff_mac_lte(void)
{
/* Add as a heuristic UDP dissector */
heur_dissector_add("udp", dissect_mac_lte_heur, proto_mac_lte);
/* Look up RLC dissector handle once and for all */
rlc_lte_handle = find_dissector("rlc-lte");
}
/*
* Editor modelines - http://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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