5873 lines
237 KiB
C
5873 lines
237 KiB
C
/* Routines for LTE MAC disassembly
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*
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* Martin Mathieson
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <epan/packet.h>
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#include <epan/expert.h>
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#include <epan/prefs.h>
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#include <epan/tap.h>
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#include <epan/uat.h>
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#include "packet-mac-lte.h"
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#include "packet-rlc-lte.h"
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/* Described in:
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* 3GPP TS 36.321 Evolved Universal Terrestrial Radio Access (E-UTRA)
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* Medium Access Control (MAC) protocol specification v11.0.0
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*/
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/* Initialize the protocol and registered fields. */
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int proto_mac_lte = -1;
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static int mac_lte_tap = -1;
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static dissector_handle_t rlc_lte_handle;
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/* Decoding context */
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static int hf_mac_lte_context = -1;
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static int hf_mac_lte_context_radio_type = -1;
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static int hf_mac_lte_context_direction = -1;
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static int hf_mac_lte_context_rnti = -1;
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static int hf_mac_lte_context_rnti_type = -1;
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static int hf_mac_lte_context_ueid = -1;
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static int hf_mac_lte_context_sysframe_number = -1;
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static int hf_mac_lte_context_subframe_number = -1;
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static int hf_mac_lte_context_grant_subframe_number = -1;
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static int hf_mac_lte_context_predefined_frame = -1;
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static int hf_mac_lte_context_length = -1;
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static int hf_mac_lte_context_ul_grant_size = -1;
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static int hf_mac_lte_context_bch_transport_channel = -1;
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static int hf_mac_lte_context_retx_count = -1;
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static int hf_mac_lte_context_retx_reason = -1;
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static int hf_mac_lte_context_crc_status = -1;
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static int hf_mac_lte_context_rapid = -1;
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static int hf_mac_lte_context_rach_attempt_number = -1;
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/* Inferred context */
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static int hf_mac_lte_ues_ul_per_tti = -1;
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static int hf_mac_lte_ues_dl_per_tti = -1;
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/* Extra PHY context */
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static int hf_mac_lte_context_phy_ul = -1;
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static int hf_mac_lte_context_phy_ul_modulation_type = -1;
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static int hf_mac_lte_context_phy_ul_tbs_index = -1;
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static int hf_mac_lte_context_phy_ul_resource_block_length = -1;
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static int hf_mac_lte_context_phy_ul_resource_block_start = -1;
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static int hf_mac_lte_context_phy_ul_harq_id = -1;
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static int hf_mac_lte_context_phy_ul_ndi = -1;
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static int hf_mac_lte_context_phy_dl = -1;
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static int hf_mac_lte_context_phy_dl_dci_format = -1;
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static int hf_mac_lte_context_phy_dl_resource_allocation_type = -1;
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static int hf_mac_lte_context_phy_dl_aggregation_level = -1;
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static int hf_mac_lte_context_phy_dl_mcs_index = -1;
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static int hf_mac_lte_context_phy_dl_redundancy_version_index = -1;
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static int hf_mac_lte_context_phy_dl_retx = -1;
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static int hf_mac_lte_context_phy_dl_resource_block_length = -1;
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static int hf_mac_lte_context_phy_dl_crc_status = -1;
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static int hf_mac_lte_context_phy_dl_harq_id = -1;
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static int hf_mac_lte_context_phy_dl_ndi = -1;
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static int hf_mac_lte_context_phy_dl_tb = -1;
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/* Out-of-band events */
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static int hf_mac_lte_oob_send_preamble = -1;
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static int hf_mac_lte_oob_send_sr = -1;
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static int hf_mac_lte_number_of_srs = -1;
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static int hf_mac_lte_oob_sr_failure = -1;
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/* MAC SCH/MCH header fields */
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static int hf_mac_lte_ulsch = -1;
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static int hf_mac_lte_ulsch_header = -1;
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static int hf_mac_lte_dlsch = -1;
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static int hf_mac_lte_dlsch_header = -1;
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static int hf_mac_lte_sch_subheader = -1;
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static int hf_mac_lte_mch = -1;
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static int hf_mac_lte_mch_header = -1;
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static int hf_mac_lte_mch_subheader = -1;
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static int hf_mac_lte_sch_reserved = -1;
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static int hf_mac_lte_dlsch_lcid = -1;
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static int hf_mac_lte_ulsch_lcid = -1;
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static int hf_mac_lte_sch_extended = -1;
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static int hf_mac_lte_sch_format = -1;
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static int hf_mac_lte_sch_length = -1;
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static int hf_mac_lte_mch_reserved = -1;
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static int hf_mac_lte_mch_lcid = -1;
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static int hf_mac_lte_mch_extended = -1;
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static int hf_mac_lte_mch_format = -1;
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static int hf_mac_lte_mch_length = -1;
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static int hf_mac_lte_sch_header_only = -1;
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static int hf_mac_lte_mch_header_only = -1;
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/* Data */
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static int hf_mac_lte_sch_sdu = -1;
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static int hf_mac_lte_mch_sdu = -1;
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static int hf_mac_lte_bch_pdu = -1;
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static int hf_mac_lte_pch_pdu = -1;
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static int hf_mac_lte_predefined_pdu = -1;
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static int hf_mac_lte_raw_pdu = -1;
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static int hf_mac_lte_padding_data = -1;
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static int hf_mac_lte_padding_length = -1;
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/* RAR fields */
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static int hf_mac_lte_rar = -1;
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static int hf_mac_lte_rar_headers = -1;
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static int hf_mac_lte_rar_header = -1;
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static int hf_mac_lte_rar_extension = -1;
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static int hf_mac_lte_rar_t = -1;
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static int hf_mac_lte_rar_bi = -1;
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static int hf_mac_lte_rar_rapid = -1;
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static int hf_mac_lte_rar_reserved = -1;
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static int hf_mac_lte_rar_body = -1;
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static int hf_mac_lte_rar_reserved2 = -1;
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static int hf_mac_lte_rar_ta = -1;
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static int hf_mac_lte_rar_ul_grant = -1;
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static int hf_mac_lte_rar_ul_grant_hopping = -1;
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static int hf_mac_lte_rar_ul_grant_fsrba = -1;
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static int hf_mac_lte_rar_ul_grant_tmcs = -1;
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static int hf_mac_lte_rar_ul_grant_tcsp = -1;
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static int hf_mac_lte_rar_ul_grant_ul_delay = -1;
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static int hf_mac_lte_rar_ul_grant_cqi_request = -1;
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static int hf_mac_lte_rar_temporary_crnti = -1;
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/* Common channel control values */
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static int hf_mac_lte_control_bsr = -1;
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static int hf_mac_lte_control_bsr_lcg_id = -1;
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static int hf_mac_lte_control_short_bsr_buffer_size = -1;
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static int hf_mac_lte_control_long_bsr_buffer_size_0 = -1;
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static int hf_mac_lte_control_long_bsr_buffer_size_1 = -1;
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static int hf_mac_lte_control_long_bsr_buffer_size_2 = -1;
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static int hf_mac_lte_control_long_bsr_buffer_size_3 = -1;
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static int hf_mac_lte_control_short_ext_bsr_buffer_size = -1;
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static int hf_mac_lte_control_long_ext_bsr_buffer_size_0 = -1;
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static int hf_mac_lte_control_long_ext_bsr_buffer_size_1 = -1;
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static int hf_mac_lte_control_long_ext_bsr_buffer_size_2 = -1;
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static int hf_mac_lte_control_long_ext_bsr_buffer_size_3 = -1;
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static int hf_mac_lte_control_crnti = -1;
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static int hf_mac_lte_control_timing_advance = -1;
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static int hf_mac_lte_control_timing_advance_group_id = -1;
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static int hf_mac_lte_control_timing_advance_command = -1;
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static int hf_mac_lte_control_ue_contention_resolution = -1;
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static int hf_mac_lte_control_ue_contention_resolution_identity = -1;
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static int hf_mac_lte_control_ue_contention_resolution_msg3 = -1;
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static int hf_mac_lte_control_ue_contention_resolution_msg3_matched = -1;
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static int hf_mac_lte_control_ue_contention_resolution_time_since_msg3 = -1;
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static int hf_mac_lte_control_power_headroom = -1;
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static int hf_mac_lte_control_power_headroom_reserved = -1;
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static int hf_mac_lte_control_power_headroom_level = -1;
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static int hf_mac_lte_control_ext_power_headroom = -1;
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static int hf_mac_lte_control_ext_power_headroom_c7 = -1;
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static int hf_mac_lte_control_ext_power_headroom_c6 = -1;
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static int hf_mac_lte_control_ext_power_headroom_c5 = -1;
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static int hf_mac_lte_control_ext_power_headroom_c4 = -1;
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static int hf_mac_lte_control_ext_power_headroom_c3 = -1;
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static int hf_mac_lte_control_ext_power_headroom_c2 = -1;
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static int hf_mac_lte_control_ext_power_headroom_c1 = -1;
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static int hf_mac_lte_control_ext_power_headroom_reserved = -1;
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static int hf_mac_lte_control_ext_power_headroom_power_backoff = -1;
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static int hf_mac_lte_control_ext_power_headroom_value = -1;
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static int hf_mac_lte_control_ext_power_headroom_level = -1;
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static int hf_mac_lte_control_ext_power_headroom_reserved2 = -1;
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static int hf_mac_lte_control_ext_power_headroom_pcmaxc = -1;
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static int hf_mac_lte_control_activation_deactivation = -1;
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static int hf_mac_lte_control_activation_deactivation_c7 = -1;
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static int hf_mac_lte_control_activation_deactivation_c6 = -1;
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static int hf_mac_lte_control_activation_deactivation_c5 = -1;
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static int hf_mac_lte_control_activation_deactivation_c4 = -1;
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static int hf_mac_lte_control_activation_deactivation_c3 = -1;
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static int hf_mac_lte_control_activation_deactivation_c2 = -1;
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static int hf_mac_lte_control_activation_deactivation_c1 = -1;
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static int hf_mac_lte_control_activation_deactivation_reserved = -1;
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static int hf_mac_lte_control_mch_scheduling_info = -1;
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static int hf_mac_lte_control_mch_scheduling_info_lcid = -1;
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static int hf_mac_lte_control_mch_scheduling_info_stop_mtch = -1;
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static int hf_mac_lte_dl_harq_resend_original_frame = -1;
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static int hf_mac_lte_dl_harq_resend_time_since_previous_frame = -1;
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static int hf_mac_lte_dl_harq_resend_next_frame = -1;
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static int hf_mac_lte_dl_harq_resend_time_until_next_frame = -1;
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static int hf_mac_lte_ul_harq_resend_original_frame = -1;
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static int hf_mac_lte_ul_harq_resend_time_since_previous_frame = -1;
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static int hf_mac_lte_ul_harq_resend_next_frame = -1;
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static int hf_mac_lte_ul_harq_resend_time_until_next_frame = -1;
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static int hf_mac_lte_grant_answering_sr = -1;
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static int hf_mac_lte_failure_answering_sr = -1;
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static int hf_mac_lte_sr_leading_to_failure = -1;
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static int hf_mac_lte_sr_leading_to_grant = -1;
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static int hf_mac_lte_sr_invalid_event = -1;
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static int hf_mac_lte_sr_time_since_request = -1;
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static int hf_mac_lte_sr_time_until_answer = -1;
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/* Subtrees. */
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static int ett_mac_lte = -1;
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static int ett_mac_lte_context = -1;
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static int ett_mac_lte_phy_context = -1;
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static int ett_mac_lte_ulsch_header = -1;
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static int ett_mac_lte_dlsch_header = -1;
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static int ett_mac_lte_mch_header = -1;
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static int ett_mac_lte_sch_subheader = -1;
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static int ett_mac_lte_mch_subheader = -1;
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static int ett_mac_lte_rar_headers = -1;
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static int ett_mac_lte_rar_header = -1;
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static int ett_mac_lte_rar_body = -1;
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static int ett_mac_lte_rar_ul_grant = -1;
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static int ett_mac_lte_bsr = -1;
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static int ett_mac_lte_bch = -1;
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static int ett_mac_lte_pch = -1;
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static int ett_mac_lte_activation_deactivation = -1;
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static int ett_mac_lte_contention_resolution = -1;
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static int ett_mac_lte_timing_advance = -1;
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static int ett_mac_lte_power_headroom = -1;
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static int ett_mac_lte_extended_power_headroom = -1;
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static int ett_mac_lte_extended_power_headroom_cell = -1;
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static int ett_mac_lte_mch_scheduling_info = -1;
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static int ett_mac_lte_oob = -1;
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/* Constants and value strings */
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static const value_string radio_type_vals[] =
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{
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{ FDD_RADIO, "FDD"},
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{ TDD_RADIO, "TDD"},
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{ 0, NULL }
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};
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static const value_string direction_vals[] =
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{
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{ DIRECTION_UPLINK, "Uplink"},
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{ DIRECTION_DOWNLINK, "Downlink"},
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{ 0, NULL }
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};
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static const value_string rnti_type_vals[] =
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{
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{ NO_RNTI, "NO-RNTI"},
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{ P_RNTI, "P-RNTI"},
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{ RA_RNTI, "RA-RNTI"},
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{ C_RNTI, "C-RNTI"},
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{ SI_RNTI, "SI-RNTI"},
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{ SPS_RNTI, "SPS-RNTI"},
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{ M_RNTI, "M-RNTI"},
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{ 0, NULL }
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};
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static const value_string bch_transport_channel_vals[] =
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{
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{ SI_RNTI, "DL-SCH"},
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{ NO_RNTI, "BCH"},
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{ 0, NULL }
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};
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static const value_string crc_status_vals[] =
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{
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{ crc_success, "OK"},
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{ crc_fail, "Failed"},
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{ crc_high_code_rate, "High Code Rate"},
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{ crc_pdsch_lost, "PDSCH Lost"},
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{ crc_duplicate_nonzero_rv, "Duplicate_nonzero_rv"},
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{ crc_false_dci, "False DCI"},
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{ 0, NULL }
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};
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static const value_string dci_format_vals[] =
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{
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{ 0, "0"},
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{ 1, "1"},
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{ 2, "1A"},
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{ 3, "1B"},
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{ 4, "1C"},
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{ 5, "1D"},
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{ 6, "2"},
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{ 7, "2A"},
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{ 8, "3/3A"},
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{ 0, NULL }
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};
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static const value_string aggregation_level_vals[] =
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{
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{ 0, "1"},
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{ 1, "2"},
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{ 2, "4"},
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{ 3, "8"},
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{ 0, NULL }
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};
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static const value_string modulation_type_vals[] =
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{
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{ 2, "QPSK"},
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{ 4, "QAM16"},
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{ 6, "QAM64"},
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{ 0, NULL }
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};
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static const true_false_string mac_lte_scell_ph_vals = {
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"Reported",
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"Not reported"
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};
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static const true_false_string mac_lte_power_backoff_vals = {
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"Applied",
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"Not applied"
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};
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static const true_false_string mac_lte_ph_value_vals = {
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"Based on reference format",
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"Based on real transmission"
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};
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static const true_false_string mac_lte_scell_status_vals = {
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"Activated",
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"Deactivated"
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};
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#define ACTIVATION_DEACTIVATION_LCID 0x1b
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#define UE_CONTENTION_RESOLUTION_IDENTITY_LCID 0x1c
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#define TIMING_ADVANCE_LCID 0x1d
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#define DRX_COMMAND_LCID 0x1e
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#define PADDING_LCID 0x1f
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static const value_string dlsch_lcid_vals[] =
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{
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{ 0, "CCCH"},
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{ 1, "1"},
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{ 2, "2"},
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{ 3, "3"},
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{ 4, "4"},
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{ 5, "5"},
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{ 6, "6"},
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{ 7, "7"},
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{ 8, "8"},
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{ 9, "9"},
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{ 10, "10"},
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{ ACTIVATION_DEACTIVATION_LCID , "Activation/Deactivation"},
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{ UE_CONTENTION_RESOLUTION_IDENTITY_LCID, "UE Contention Resolution Identity"},
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{ TIMING_ADVANCE_LCID , "Timing Advance"},
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{ DRX_COMMAND_LCID , "DRX Command"},
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{ PADDING_LCID , "Padding" },
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{ 0, NULL }
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};
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#define EXTENDED_POWER_HEADROOM_REPORT_LCID 0x19
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#define POWER_HEADROOM_REPORT_LCID 0x1a
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#define CRNTI_LCID 0x1b
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#define TRUNCATED_BSR_LCID 0x1c
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#define SHORT_BSR_LCID 0x1d
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#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;
|
|
|
|
/* 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;
|
|
|
|
/* 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, 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, 2, "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];
|
|
} 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;
|
|
|
|
|
|
/**************************************************************************/
|
|
|
|
|
|
|
|
/* 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 = TRUE;
|
|
p_mac_lte_info->detailed_phy_info.dl_info.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 ((size_t)tvb_length_remaining(tvb, offset) < (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 = p_get_proto_data(pinfo->fd, proto_mac_lte);
|
|
if (p_mac_lte_info == NULL) {
|
|
/* Allocate new info struct for this frame */
|
|
p_mac_lte_info = se_alloc0(sizeof(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(pinfo->fd, proto_mac_lte, p_mac_lte_info);
|
|
}
|
|
|
|
/**************************************/
|
|
/* OK, now dissect as MAC LTE */
|
|
|
|
/* Create tvb that starts at actual MAC PDU */
|
|
mac_tvb = tvb_new_subset(tvb, offset, -1, tvb_reported_length(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);
|
|
}
|
|
}
|
|
|
|
/* 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, PI_MALFORMED, PI_ERROR,
|
|
"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) {
|
|
expert_add_info_format(pinfo, ti, PI_SEQUENCE, (timing_advance <= 31) ? PI_NOTE : PI_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 = ep_alloc(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, PI_MALFORMED, PI_ERROR,
|
|
"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_format(pinfo, bi_ti, PI_MALFORMED, PI_ERROR,
|
|
"MAC RAR PDU has > 1 Backoff Indicator subheader 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_format(pinfo, bi_ti, PI_MALFORMED, PI_WARN,
|
|
"Backoff Indicator must appear as 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);
|
|
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(tvb, offset, -1, tvb_length_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_format(pinfo, ti, PI_MALFORMED, PI_ERROR,
|
|
"BCH data should not be received in Uplink!");
|
|
}
|
|
}
|
|
|
|
|
|
/* Dissect PCH PDU */
|
|
static void dissect_pch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
proto_item *pdu_ti, int offset, guint8 direction)
|
|
{
|
|
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);
|
|
|
|
if (global_mac_lte_attempt_rrc_decode) {
|
|
|
|
/* Attempt to decode payload using LTE RRC dissector */
|
|
tvbuff_t *rrc_tvb = tvb_new_subset(tvb, offset, -1, tvb_length_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_format(pinfo, ti, PI_MALFORMED, PI_ERROR,
|
|
"PCH data should not be received in Uplink!");
|
|
}
|
|
}
|
|
|
|
|
|
/* 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 = p_get_proto_data(pinfo->fd, proto_rlc_lte);
|
|
if (p_rlc_lte_info == NULL) {
|
|
p_rlc_lte_info = se_alloc0(sizeof(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(pinfo->fd, proto_rlc_lte, 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(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 > 2)) {
|
|
return;
|
|
}
|
|
|
|
/* Look up entry for this UE/RNTI */
|
|
ueData = 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 = se_alloc0(sizeof(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 = g_hash_table_lookup(mac_lte_dl_harq_result_hash, GUINT_TO_POINTER(lastData->framenum));
|
|
if (original_result == NULL) {
|
|
original_result = se_alloc0(sizeof(ULHARQResult));
|
|
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 = se_alloc0(sizeof(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 = 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 = p_get_proto_data(pinfo->fd, proto_mac_lte);
|
|
|
|
if (direction == DIRECTION_UPLINK) {
|
|
/* For UL, retx count is stored in per-packet struct */
|
|
return ((p_mac_lte_info != NULL) && (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 = 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 =
|
|
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 = se_alloc0(sizeof(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 = g_hash_table_lookup(mac_lte_ul_harq_result_hash, GUINT_TO_POINTER(lastData->framenum));
|
|
if (original_result == NULL) {
|
|
original_result = se_alloc0(sizeof(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 = se_alloc0(sizeof(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 = 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, PI_SEQUENCE, PI_ERROR,
|
|
"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, PI_SEQUENCE, PI_WARN,
|
|
"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 = g_hash_table_lookup(mac_lte_sr_request_hash, GUINT_TO_POINTER(frameNum));
|
|
|
|
if ((result == NULL) && can_create) {
|
|
result = se_alloc0(sizeof(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 = g_hash_table_lookup(mac_lte_ue_sr_state, GUINT_TO_POINTER((guint)rnti));
|
|
if (state == NULL) {
|
|
/* Allocate status for this RNTI */
|
|
state = se_alloc(sizeof(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, PI_SEQUENCE, PI_ERROR,
|
|
"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:
|
|
ti = proto_tree_add_none_format(tree, hf_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"));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
expert_add_info_format(pinfo, ti, PI_SEQUENCE, PI_ERROR,
|
|
"Invalid SR event for UE %u (C-RNTI %u) - state=%s, event=%s",
|
|
ueid, rnti,
|
|
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 = 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 = se_alloc(sizeof(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 = 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 = 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;
|
|
|
|
/* 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, PI_MALFORMED, PI_ERROR,
|
|
"%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, PI_SEQUENCE, PI_NOTE,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"%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_format(pinfo, lcid_ti, PI_MALFORMED, PI_ERROR,
|
|
"There shouldn't be > 1 BSR in a frame");
|
|
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_format(pinfo, lcid_ti, PI_MALFORMED, PI_WARN,
|
|
"Should not see more than 2 padding subheaders in one frame");
|
|
}
|
|
|
|
if (have_seen_non_padding_control) {
|
|
expert_add_info_format(pinfo, lcid_ti, PI_MALFORMED, PI_ERROR,
|
|
"Padding should come before other control subheaders!");
|
|
}
|
|
}
|
|
|
|
/* 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(pdu_ti, NULL, pinfo, ") ");
|
|
break;
|
|
case -1:
|
|
write_pdu_label_and_info(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 (match_strval(lcids[number_of_headers],
|
|
(direction == DIRECTION_UPLINK) ? ulsch_lcid_vals : dlsch_lcid_vals) == NULL) {
|
|
expert_add_info_format(pinfo, pdu_subheader_ti, PI_MALFORMED, PI_ERROR,
|
|
"%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_item *ti = proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Reached %u subheaders - frame obviously malformed",
|
|
MAX_HEADERS_IN_PDU);
|
|
expert_add_info_format(pinfo, ti, PI_MALFORMED, PI_ERROR,
|
|
"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) {
|
|
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, PI_MALFORMED, PI_ERROR,
|
|
"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);
|
|
|
|
|
|
proto_tree_add_item(cr_tree, hf_mac_lte_control_ue_contention_resolution_identity,
|
|
tvb, offset, 6, ENC_NA);
|
|
|
|
/* Get pointer to result struct for this frame */
|
|
crResult = 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 = se_alloc(sizeof(ContentionResolutionResult));
|
|
g_hash_table_insert(mac_lte_cr_result_hash, GUINT_TO_POINTER(pinfo->fd->num), crResult);
|
|
|
|
/* Look for Msg3 */
|
|
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, PI_SEQUENCE, PI_WARN,
|
|
"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_format(pinfo, ta_value_ti, PI_SEQUENCE,
|
|
PI_NOTE,
|
|
"Timing Advance control element received (no correction needed)");
|
|
}
|
|
else {
|
|
expert_add_info_format(pinfo, ta_value_ti, PI_SEQUENCE,
|
|
PI_WARN,
|
|
"Timing Advance control element received (%u) %s correction needed",
|
|
ta_value,
|
|
(ta_value < 31) ? "-ve" : "+ve");
|
|
}
|
|
offset++;
|
|
}
|
|
break;
|
|
case DRX_COMMAND_LCID:
|
|
/* No payload */
|
|
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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_SEQUENCE, PI_WARN,
|
|
"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, PI_SEQUENCE, PI_WARN,
|
|
"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, PI_SEQUENCE, PI_WARN,
|
|
"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, PI_SEQUENCE, PI_WARN,
|
|
"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, PI_SEQUENCE, PI_WARN,
|
|
"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_format(pinfo, truncated_ti, PI_SEQUENCE, PI_NOTE,
|
|
"MAC PDU SDUs have been omitted");
|
|
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 = 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 = se_alloc(sizeof(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;
|
|
tap_info->sdus_for_lcid[lcids[n]]++;
|
|
}
|
|
|
|
|
|
/* 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, PI_MALFORMED, PI_ERROR,
|
|
"%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, PI_MALFORMED, PI_ERROR,
|
|
"%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, PI_MALFORMED, PI_ERROR,
|
|
"%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);
|
|
}
|
|
}
|
|
}
|
|
|
|
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(pdu_ti, NULL, pinfo,
|
|
"MCH: ",
|
|
p_mac_lte_info->subframeNumber);
|
|
|
|
/* 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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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_format(pinfo, lcid_ti, PI_MALFORMED, PI_WARN,
|
|
"Should not see more than 2 padding subheaders in one frame");
|
|
}
|
|
|
|
if (have_seen_non_padding_control) {
|
|
expert_add_info_format(pinfo, lcid_ti, PI_MALFORMED, PI_ERROR,
|
|
"Padding should come before other control subheaders!");
|
|
}
|
|
}
|
|
|
|
/* 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(pdu_ti, NULL, pinfo, ") ");
|
|
break;
|
|
case -1:
|
|
write_pdu_label_and_info(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 (match_strval(lcids[number_of_headers],mch_lcid_vals) == NULL) {
|
|
expert_add_info_format(pinfo, pdu_subheader_ti, PI_MALFORMED, PI_ERROR,
|
|
"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_item *ti = proto_tree_add_text(tree, tvb, offset, 1,
|
|
"Reached %u subheaders - frame obviously malformed",
|
|
MAX_HEADERS_IN_PDU);
|
|
expert_add_info_format(pinfo, ti, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_WARN,
|
|
"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_format(pinfo, truncated_ti, PI_SEQUENCE, PI_NOTE,
|
|
"MAC PDU SDUs have been omitted");
|
|
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 {
|
|
/* 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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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 = ep_alloc0(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 = p_get_proto_data(pinfo->fd, proto_mac_lte);
|
|
|
|
/* 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 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);
|
|
|
|
/* Add expert info (a note, unless attempt > 1) */
|
|
expert_add_info_format(pinfo, ti, PI_SEQUENCE,
|
|
(p_mac_lte_info->rach_attempt_number > 1) ? PI_WARN : PI_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_item(mac_lte_tree, hf_mac_lte_oob_send_sr,
|
|
tvb, 0, 0, ENC_NA);
|
|
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]);
|
|
}
|
|
|
|
/* Add expert info (a note) */
|
|
expert_add_info_format(pinfo, sr_ti, PI_SEQUENCE, PI_NOTE,
|
|
"Scheduling Request sent for UE %u (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);
|
|
|
|
ti = proto_tree_add_item(mac_lte_tree, hf_mac_lte_oob_sr_failure,
|
|
tvb, 0, 0, ENC_NA);
|
|
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);
|
|
|
|
/* Add expert info (an error) */
|
|
expert_add_info_format(pinfo, ti, PI_SEQUENCE, PI_ERROR,
|
|
"Scheduling Request failed for UE %u (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;
|
|
}
|
|
|
|
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);
|
|
|
|
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, PI_MALFORMED, PI_ERROR,
|
|
"Subframe number (%u) was 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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"%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, PI_SEQUENCE, PI_WARN,
|
|
"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, PI_MALFORMED, PI_ERROR,
|
|
"%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);
|
|
}
|
|
}
|
|
|
|
/* 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);
|
|
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);
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
|
|
static void* lcid_drb_mapping_copy_cb(void* dest, const void* orig, size_t len _U_)
|
|
{
|
|
const lcid_drb_mapping_t *o = orig;
|
|
lcid_drb_mapping_t *d = dest;
|
|
|
|
/* Copy all items over */
|
|
d->lcid = o->lcid;
|
|
d->drbid = o->drbid;
|
|
d->channel_type = o->channel_type;
|
|
|
|
return d;
|
|
}
|
|
|
|
|
|
/* Set LCID -> RLC channel mappings from signalling protocol (i.e. RRC or similar). */
|
|
void set_mac_lte_channel_mapping(guint16 ueid, guint8 lcid,
|
|
guint8 srbid, guint8 drbid,
|
|
guint8 rlcMode, guint8 um_sn_length,
|
|
guint8 ul_priority)
|
|
{
|
|
ue_dynamic_drb_mappings_t *ue_mappings;
|
|
|
|
/* Don't bother setting srb details - we just assume AM */
|
|
if (srbid != 0) {
|
|
return;
|
|
}
|
|
|
|
/* Ignore if LCID is out of range */
|
|
if ((lcid < 3) || (lcid > 10)) {
|
|
return;
|
|
}
|
|
|
|
/* Look for existing UE entry */
|
|
ue_mappings = g_hash_table_lookup(mac_lte_ue_channels_hash, GUINT_TO_POINTER((guint)ueid));
|
|
if (!ue_mappings) {
|
|
ue_mappings = se_alloc0(sizeof(ue_dynamic_drb_mappings_t));
|
|
g_hash_table_insert(mac_lte_ue_channels_hash, GUINT_TO_POINTER((guint)ueid), ue_mappings);
|
|
}
|
|
|
|
/* Set array entry */
|
|
ue_mappings->mapping[lcid].valid = TRUE;
|
|
ue_mappings->mapping[lcid].drbid = drbid;
|
|
ue_mappings->mapping[lcid].ul_priority = ul_priority;
|
|
|
|
switch (rlcMode) {
|
|
case RLC_AM_MODE:
|
|
ue_mappings->mapping[lcid].channel_type = rlcAM;
|
|
break;
|
|
case RLC_UM_MODE:
|
|
if (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 = 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;
|
|
}
|
|
}
|
|
|
|
/* 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 p_get_proto_data(pinfo->fd, proto_mac_lte);
|
|
}
|
|
|
|
/* 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(pinfo->fd, proto_mac_lte, 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_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_oob_send_sr,
|
|
{ "Scheduling Request sent",
|
|
"mac-lte.sr-req", FT_NONE, 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
|
|
}
|
|
},
|
|
{ &hf_mac_lte_oob_sr_failure,
|
|
{ "Scheduling Request failure",
|
|
"mac-lte.sr-failure", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, 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_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_invalid_event,
|
|
{ "Invalid event",
|
|
"mac-lte.ulsch.sr-invalid-event", FT_NONE, 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
|
|
}
|
|
},
|
|
|
|
};
|
|
|
|
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
|
|
};
|
|
|
|
static 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 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;
|
|
|
|
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));
|
|
|
|
/* 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_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);
|
|
|
|
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");
|
|
}
|
|
|