forked from osmocom/wireshark
![Darien Spencer](/assets/img/avatar_default.png)
Change-Id: Iba74c38336ba06d207444fda32376a8c3851b61d Reviewed-on: https://code.wireshark.org/review/28787 Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
6878 lines
273 KiB
C
6878 lines
273 KiB
C
/* packet-umts_fp.c
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* Routines for UMTS FP disassembly
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*
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* Martin Mathieson
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.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/conversation.h>
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#include <epan/proto_data.h>
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#include <wsutil/crc7.h> /* For FP data header and control frame CRC. */
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#include <wsutil/crc16-plain.h> /* For FP Payload CRC. */
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#include <wsutil/crc11.h> /* For FP EDCH header CRC. */
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#include <wsutil/pint.h>
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#include "packet-umts_fp.h"
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#include "packet-nbap.h"
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#include "packet-rrc.h"
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/* The Frame Protocol (FP) is described in:
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* 3GPP TS 25.427 (for dedicated channels)
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* 3GPP TS 25.435 (for common/shared channels)
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*
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* TODO:
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* - IUR interface-specific formats
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* - do CRC verification before further parsing
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* - Set the logical channel properly for non multiplexed, channels
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* for channels that doesn't have the C/T flag! This should be based
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* on the RRC message RadioBearerSetup.
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* - E-DCH (T1 & T2) heuristic dissectors
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*/
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void proto_register_fp(void);
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void proto_reg_handoff_fp(void);
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/* Initialize the protocol and registered fields. */
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int proto_fp = -1;
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extern int proto_umts_mac;
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extern int proto_umts_rlc;
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static int hf_fp_release = -1;
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static int hf_fp_release_version = -1;
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static int hf_fp_release_year = -1;
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static int hf_fp_release_month = -1;
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static int hf_fp_channel_type = -1;
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static int hf_fp_division = -1;
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static int hf_fp_direction = -1;
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static int hf_fp_ddi_config = -1;
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static int hf_fp_ddi_config_ddi = -1;
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static int hf_fp_ddi_config_macd_pdu_size = -1;
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static int hf_fp_header_crc = -1;
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static int hf_fp_ft = -1;
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static int hf_fp_cfn = -1;
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static int hf_fp_pch_cfn = -1;
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static int hf_fp_pch_toa = -1;
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static int hf_fp_cfn_control = -1;
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static int hf_fp_toa = -1;
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static int hf_fp_tfi = -1;
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static int hf_fp_usch_tfi = -1;
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static int hf_fp_cpch_tfi = -1;
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static int hf_fp_propagation_delay = -1;
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static int hf_fp_tb = -1;
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static int hf_fp_chan_zero_tbs = -1;
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static int hf_fp_received_sync_ul_timing_deviation = -1;
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static int hf_fp_pch_pi = -1;
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static int hf_fp_pch_tfi = -1;
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static int hf_fp_fach_tfi = -1;
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static int hf_fp_transmit_power_level = -1;
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static int hf_fp_paging_indication_bitmap = -1;
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static int hf_fp_relevant_paging_indication_bitmap = -1;
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static int hf_fp_pdsch_set_id = -1;
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static int hf_fp_rx_timing_deviation = -1;
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static int hf_fp_dch_e_rucch_flag = -1;
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static int hf_fp_dch_control_frame_type = -1;
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static int hf_fp_dch_rx_timing_deviation = -1;
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static int hf_fp_quality_estimate = -1;
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static int hf_fp_payload_crc = -1;
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static int hf_fp_edch_header_crc = -1;
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static int hf_fp_edch_fsn = -1;
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static int hf_fp_edch_subframe = -1;
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static int hf_fp_edch_number_of_subframes = -1;
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static int hf_fp_edch_harq_retransmissions = -1;
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static int hf_fp_edch_subframe_number = -1;
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static int hf_fp_edch_number_of_mac_es_pdus = -1;
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static int hf_fp_edch_ddi = -1;
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static int hf_fp_edch_subframe_header = -1;
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static int hf_fp_edch_number_of_mac_d_pdus = -1;
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static int hf_fp_edch_pdu_padding = -1;
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static int hf_fp_edch_tsn = -1;
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static int hf_fp_edch_mac_es_pdu = -1;
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static int hf_fp_edch_user_buffer_size = -1;
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static int hf_fp_edch_no_macid_sdus = -1;
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static int hf_fp_edch_number_of_mac_is_pdus = -1;
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static int hf_fp_edch_mac_is_pdu = -1;
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static int hf_fp_edch_e_rnti = -1;
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static int hf_fp_edch_macis_descriptors = -1;
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static int hf_fp_edch_macis_lchid = -1;
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static int hf_fp_edch_macis_length = -1;
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static int hf_fp_edch_macis_flag = -1;
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static int hf_fp_frame_seq_nr = -1;
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static int hf_fp_hsdsch_pdu_block_header = -1;
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/* static int hf_fp_hsdsch_pdu_block = -1; */
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static int hf_fp_flush = -1;
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static int hf_fp_fsn_drt_reset = -1;
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static int hf_fp_drt_indicator = -1;
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static int hf_fp_fach_indicator = -1;
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static int hf_fp_total_pdu_blocks = -1;
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static int hf_fp_drt = -1;
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static int hf_fp_hrnti = -1;
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static int hf_fp_rach_measurement_result = -1;
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static int hf_fp_lchid = -1;
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static int hf_fp_pdu_length_in_block = -1;
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static int hf_fp_pdus_in_block = -1;
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static int hf_fp_cmch_pi = -1;
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static int hf_fp_user_buffer_size = -1;
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static int hf_fp_hsdsch_credits = -1;
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static int hf_fp_hsdsch_max_macd_pdu_len = -1;
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static int hf_fp_hsdsch_max_macdc_pdu_len = -1;
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static int hf_fp_hsdsch_interval = -1;
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static int hf_fp_hsdsch_calculated_rate = -1;
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static int hf_fp_hsdsch_unlimited_rate = -1;
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static int hf_fp_hsdsch_repetition_period = -1;
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static int hf_fp_hsdsch_data_padding = -1;
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static int hf_fp_hsdsch_new_ie_flags = -1;
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static int hf_fp_hsdsch_new_ie_flag[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
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static int hf_fp_hsdsch_drt = -1;
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static int hf_fp_hsdsch_entity = -1;
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static int hf_fp_hsdsch_physical_layer_category = -1;
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static int hf_fp_timing_advance = -1;
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static int hf_fp_num_of_pdu = -1;
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static int hf_fp_mac_d_pdu_len = -1;
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static int hf_fp_mac_d_pdu = -1;
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static int hf_fp_data = -1;
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static int hf_fp_crcis = -1;
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static int hf_fp_crci[8] = {-1, -1, -1, -1, -1, -1, -1, -1};
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static int hf_fp_common_control_frame_type = -1;
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static int hf_fp_t1 = -1;
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static int hf_fp_t2 = -1;
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static int hf_fp_t3 = -1;
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static int hf_fp_ul_sir_target = -1;
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static int hf_fp_pusch_set_id = -1;
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static int hf_fp_activation_cfn = -1;
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static int hf_fp_duration = -1;
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static int hf_fp_power_offset = -1;
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static int hf_fp_code_number = -1;
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static int hf_fp_spreading_factor = -1;
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static int hf_fp_mc_info = -1;
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static int hf_fp_rach_new_ie_flags = -1;
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static int hf_fp_rach_new_ie_flag_unused[7] = {-1, -1, -1, -1, -1, -1, -1 };
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static int hf_fp_rach_ext_propagation_delay_present = -1;
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static int hf_fp_rach_cell_portion_id_present = -1;
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static int hf_fp_rach_angle_of_arrival_present = -1;
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static int hf_fp_rach_ext_rx_sync_ul_timing_deviation_present = -1;
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static int hf_fp_rach_ext_rx_timing_deviation_present = -1;
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static int hf_fp_cell_portion_id = -1;
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static int hf_fp_ext_propagation_delay = -1;
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static int hf_fp_angle_of_arrival = -1;
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static int hf_fp_ext_received_sync_ul_timing_deviation = -1;
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static int hf_fp_radio_interface_parameter_update_flag[5] = {-1, -1, -1, -1, -1};
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static int hf_fp_dpc_mode = -1;
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static int hf_fp_tpc_po = -1;
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static int hf_fp_multiple_rl_set_indicator = -1;
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static int hf_fp_max_ue_tx_pow = -1;
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static int hf_fp_congestion_status = -1;
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static int hf_fp_e_rucch_present = -1;
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static int hf_fp_extended_bits_present = -1;
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static int hf_fp_extended_bits = -1;
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static int hf_fp_spare_extension = -1;
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static int hf_fp_ul_setup_frame = -1;
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static int hf_fp_dl_setup_frame = -1;
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static int hf_fp_relevant_pi_frame = -1;
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/* Subtrees. */
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static int ett_fp = -1;
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static int ett_fp_release = -1;
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static int ett_fp_data = -1;
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static int ett_fp_crcis = -1;
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static int ett_fp_ddi_config = -1;
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static int ett_fp_edch_subframe_header = -1;
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static int ett_fp_edch_subframe = -1;
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static int ett_fp_edch_maces = -1;
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static int ett_fp_edch_macis_descriptors = -1;
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static int ett_fp_hsdsch_new_ie_flags = -1;
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static int ett_fp_rach_new_ie_flags = -1;
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static int ett_fp_hsdsch_pdu_block_header = -1;
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static int ett_fp_pch_relevant_pi = -1;
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static expert_field ei_fp_hsdsch_common_experimental_support = EI_INIT;
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static expert_field ei_fp_hsdsch_common_t3_not_implemented = EI_INIT;
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static expert_field ei_fp_channel_type_unknown = EI_INIT;
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static expert_field ei_fp_ddi_not_defined = EI_INIT;
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static expert_field ei_fp_stop_hsdpa_transmission = EI_INIT;
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static expert_field ei_fp_hsdsch_entity_not_specified = EI_INIT;
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static expert_field ei_fp_expecting_tdd = EI_INIT;
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static expert_field ei_fp_bad_payload_checksum = EI_INIT;
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static expert_field ei_fp_e_rnti_t2_edch_frames = EI_INIT;
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static expert_field ei_fp_crci_no_subdissector = EI_INIT;
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static expert_field ei_fp_timing_adjustmentment_reported = EI_INIT;
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static expert_field ei_fp_mac_is_sdus_miscount = EI_INIT;
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static expert_field ei_fp_maybe_srb = EI_INIT;
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static expert_field ei_fp_transport_channel_type_unknown = EI_INIT;
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static expert_field ei_fp_pch_lost_relevant_pi_frame = EI_INIT;
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static expert_field ei_fp_unable_to_locate_ddi_entry = EI_INIT;
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static expert_field ei_fp_e_rnti_first_entry = EI_INIT;
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static expert_field ei_fp_bad_header_checksum = EI_INIT;
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static expert_field ei_fp_crci_error_bit_set_for_tb = EI_INIT;
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static expert_field ei_fp_spare_extension = EI_INIT;
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static expert_field ei_fp_no_per_frame_info = EI_INIT;
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static expert_field ei_fp_no_per_conv_channel_info = EI_INIT;
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static dissector_handle_t rlc_bcch_handle;
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static dissector_handle_t mac_fdd_dch_handle;
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static dissector_handle_t mac_fdd_rach_handle;
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static dissector_handle_t mac_fdd_fach_handle;
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static dissector_handle_t mac_fdd_pch_handle;
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static dissector_handle_t mac_fdd_edch_handle;
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static dissector_handle_t mac_fdd_edch_type2_handle;
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static dissector_handle_t mac_fdd_hsdsch_handle;
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static dissector_handle_t fp_handle;
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static proto_tree *top_level_tree = NULL;
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/* Variables used for preferences */
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static gboolean preferences_call_mac_dissectors = TRUE;
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static gboolean preferences_show_release_info = TRUE;
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static gboolean preferences_payload_checksum = TRUE;
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static gboolean preferences_header_checksum = TRUE;
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static gboolean preferences_track_paging_indications = TRUE;
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/* E-DCH (T1) channel header information */
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struct edch_t1_subframe_info
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{
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guint8 subframe_number;
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guint8 number_of_mac_es_pdus;
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guint8 ddi[64];
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guint16 number_of_mac_d_pdus[64];
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};
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/* E-DCH (T2) channel header information */
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struct edch_t2_subframe_info
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{
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guint8 subframe_number;
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guint8 number_of_mac_is_pdus;
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guint8 number_of_mac_is_sdus[16];
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guint8 mac_is_lchid[16][16];
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guint16 mac_is_length[16][16];
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};
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static const value_string channel_type_vals[] =
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{
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{ CHANNEL_RACH_FDD, "RACH_FDD" },
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{ CHANNEL_RACH_TDD, "RACH_TDD" },
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{ CHANNEL_FACH_FDD, "FACH_FDD" },
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{ CHANNEL_FACH_TDD, "FACH_TDD" },
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{ CHANNEL_DSCH_FDD, "DSCH_FDD" },
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{ CHANNEL_DSCH_TDD, "DSCH_TDD" },
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{ CHANNEL_USCH_TDD_384, "USCH_TDD_384" },
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{ CHANNEL_USCH_TDD_128, "USCH_TDD_128" },
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{ CHANNEL_PCH, "PCH" },
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{ CHANNEL_CPCH, "CPCH" },
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{ CHANNEL_BCH, "BCH" },
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{ CHANNEL_DCH, "DCH" },
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{ CHANNEL_HSDSCH, "HSDSCH" },
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{ CHANNEL_IUR_CPCHF, "IUR CPCHF" },
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{ CHANNEL_IUR_FACH, "IUR FACH" },
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{ CHANNEL_IUR_DSCH, "IUR DSCH" },
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{ CHANNEL_EDCH, "EDCH" },
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{ CHANNEL_RACH_TDD_128, "RACH_TDD_128" },
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{ CHANNEL_HSDSCH_COMMON, "HSDSCH-COMMON" },
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{ CHANNEL_HSDSCH_COMMON_T3, "HSDSCH-COMMON-T3" },
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{ CHANNEL_EDCH_COMMON, "EDCH-COMMON"},
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{ 0, NULL }
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};
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static const value_string division_vals[] =
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{
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{ Division_FDD, "FDD"},
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{ Division_TDD_384, "TDD-384"},
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{ Division_TDD_128, "TDD-128"},
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{ Division_TDD_768, "TDD-768"},
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{ 0, NULL }
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};
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static const value_string data_control_vals[] = {
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{ 0, "Data" },
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{ 1, "Control" },
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{ 0, NULL }
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};
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static const value_string direction_vals[] = {
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{ 0, "Downlink" },
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{ 1, "Uplink" },
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{ 0, NULL }
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};
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static const value_string crci_vals[] = {
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{ 0, "Correct" },
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{ 1, "Not correct" },
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{ 0, NULL }
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};
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static const value_string paging_indication_vals[] = {
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{ 0, "no PI-bitmap in payload" },
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{ 1, "PI-bitmap in payload" },
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{ 0, NULL }
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};
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static const value_string spreading_factor_vals[] = {
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{ 0, "4"},
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{ 1, "8"},
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{ 2, "16"},
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{ 3, "32"},
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{ 4, "64"},
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{ 5, "128"},
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{ 6, "256"},
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{ 0, NULL }
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};
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static const value_string congestion_status_vals[] = {
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{ 0, "No TNL congestion"},
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{ 1, "Reserved for future use"},
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{ 2, "TNL congestion - detected by delay build-up"},
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{ 3, "TNL congestion - detected by frame loss"},
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{ 0, NULL }
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};
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static const value_string e_rucch_flag_vals[] = {
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{ 0, "Conventional E-RUCCH reception" },
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{ 1, "TA Request reception" },
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{ 0, NULL }
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};
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static const value_string hsdshc_mac_entity_vals[] = {
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{ entity_not_specified, "Unspecified (assume MAC-hs)" },
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{ hs, "MAC-hs" },
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{ ehs, "MAC-ehs" },
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{ 0, NULL }
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};
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/* TODO: add and use */
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#if 0
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static const value_string segmentation_status_vals[] = {
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{ 0, "" },
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{ 1, "" },
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{ 2, "" },
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{ 3, "" },
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{ 0, NULL }
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};
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#endif
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static const value_string lchid_vals[] = {
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{ 0, "Logical Channel 1" },
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{ 1, "Logical Channel 2" },
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{ 2, "Logical Channel 3" },
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{ 3, "Logical Channel 4" },
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{ 4, "Logical Channel 5" },
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{ 5, "Logical Channel 6" },
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{ 6, "Logical Channel 7" },
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{ 7, "Logical Channel 8" },
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{ 8, "Logical Channel 9" },
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{ 9, "Logical Channel 10" },
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{ 10, "Logical Channel 11" },
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{ 11, "Logical Channel 12" },
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{ 12, "Logical Channel 13" },
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{ 13, "Logical Channel 14" },
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{ 14, "CCCH (SRB0)" },
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{ 15, "E-RNTI being included (FDD only)" },
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{ 0, NULL }
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};
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/* Dedicated control types */
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#define DCH_OUTER_LOOP_POWER_CONTROL 1
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#define DCH_TIMING_ADJUSTMENT 2
|
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#define DCH_DL_SYNCHRONISATION 3
|
|
#define DCH_UL_SYNCHRONISATION 4
|
|
|
|
#define DCH_DL_NODE_SYNCHRONISATION 6
|
|
#define DCH_UL_NODE_SYNCHRONISATION 7
|
|
#define DCH_RX_TIMING_DEVIATION 8
|
|
#define DCH_RADIO_INTERFACE_PARAMETER_UPDATE 9
|
|
#define DCH_TIMING_ADVANCE 10
|
|
#define DCH_TNL_CONGESTION_INDICATION 11
|
|
|
|
static const value_string dch_control_frame_type_vals[] = {
|
|
{ DCH_OUTER_LOOP_POWER_CONTROL, "OUTER LOOP POWER CONTROL" },
|
|
{ DCH_TIMING_ADJUSTMENT, "TIMING ADJUSTMENT" },
|
|
{ DCH_DL_SYNCHRONISATION, "DL SYNCHRONISATION" },
|
|
{ DCH_UL_SYNCHRONISATION, "UL SYNCHRONISATION" },
|
|
{ 5, "Reserved Value" },
|
|
{ DCH_DL_NODE_SYNCHRONISATION, "DL NODE SYNCHRONISATION" },
|
|
{ DCH_UL_NODE_SYNCHRONISATION, "UL NODE SYNCHRONISATION" },
|
|
{ DCH_RX_TIMING_DEVIATION, "RX TIMING DEVIATION" },
|
|
{ DCH_RADIO_INTERFACE_PARAMETER_UPDATE, "RADIO INTERFACE PARAMETER UPDATE" },
|
|
{ DCH_TIMING_ADVANCE, "TIMING ADVANCE" },
|
|
{ DCH_TNL_CONGESTION_INDICATION, "TNL CONGESTION INDICATION" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
|
|
/* Common channel control types */
|
|
#define COMMON_OUTER_LOOP_POWER_CONTROL 1
|
|
#define COMMON_TIMING_ADJUSTMENT 2
|
|
#define COMMON_DL_SYNCHRONISATION 3
|
|
#define COMMON_UL_SYNCHRONISATION 4
|
|
|
|
#define COMMON_DL_NODE_SYNCHRONISATION 6
|
|
#define COMMON_UL_NODE_SYNCHRONISATION 7
|
|
#define COMMON_DYNAMIC_PUSCH_ASSIGNMENT 8
|
|
#define COMMON_TIMING_ADVANCE 9
|
|
#define COMMON_HS_DSCH_Capacity_Request 10
|
|
#define COMMON_HS_DSCH_Capacity_Allocation 11
|
|
#define COMMON_HS_DSCH_Capacity_Allocation_Type_2 12
|
|
|
|
static const value_string common_control_frame_type_vals[] = {
|
|
{ COMMON_OUTER_LOOP_POWER_CONTROL, "OUTER LOOP POWER CONTROL" },
|
|
{ COMMON_TIMING_ADJUSTMENT, "TIMING ADJUSTMENT" },
|
|
{ COMMON_DL_SYNCHRONISATION, "DL SYNCHRONISATION" },
|
|
{ COMMON_UL_SYNCHRONISATION, "UL SYNCHRONISATION" },
|
|
{ 5, "Reserved Value" },
|
|
{ COMMON_DL_NODE_SYNCHRONISATION, "DL NODE SYNCHRONISATION" },
|
|
{ COMMON_UL_NODE_SYNCHRONISATION, "UL NODE SYNCHRONISATION" },
|
|
{ COMMON_DYNAMIC_PUSCH_ASSIGNMENT, "DYNAMIC PUSCH ASSIGNMENT" },
|
|
{ COMMON_TIMING_ADVANCE, "TIMING ADVANCE" },
|
|
{ COMMON_HS_DSCH_Capacity_Request, "HS-DSCH Capacity Request" },
|
|
{ COMMON_HS_DSCH_Capacity_Allocation, "HS-DSCH Capacity Allocation" },
|
|
{ COMMON_HS_DSCH_Capacity_Allocation_Type_2, "HS-DSCH Capacity Allocation Type 2" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* 0 to 7*/
|
|
static const guint8 hsdsch_macdflow_id_rlc_map[] = {
|
|
RLC_UM, /*0 SRB */
|
|
RLC_AM, /*1 Interactive PS*/
|
|
RLC_AM, /*2 Interatcive PS*/
|
|
RLC_UNKNOWN_MODE, /*3 ???*/
|
|
RLC_AM, /*4 Streaming PS*/
|
|
RLC_UNKNOWN_MODE,
|
|
RLC_UNKNOWN_MODE,
|
|
RLC_UNKNOWN_MODE
|
|
};
|
|
|
|
/* Mapping hsdsch MACd-FlowId to MAC_CONTENT, basically flowid = 1 (0) => SRB*/
|
|
/* 1 to 8*/
|
|
static const guint8 hsdsch_macdflow_id_mac_content_map[] = {
|
|
MAC_CONTENT_DCCH, /*1 SRB */
|
|
MAC_CONTENT_PS_DTCH, /*2 Interactive PS*/
|
|
MAC_CONTENT_PS_DTCH, /*3 Interatcive PS*/
|
|
RLC_UNKNOWN_MODE, /*4 ???*/
|
|
MAC_CONTENT_PS_DTCH, /*5 Streaming PS*/
|
|
RLC_UNKNOWN_MODE,
|
|
RLC_UNKNOWN_MODE,
|
|
RLC_UNKNOWN_MODE
|
|
};
|
|
|
|
/* Make fake logical channel id's based on MACdFlow-ID's,
|
|
* XXXX Bug 12121 expanded the number of entries to 8(+2),
|
|
* not at all sure what the proper value should be 0xfF?
|
|
*/
|
|
static const guint8 fake_lchid_macd_flow[] = {1,9,14,11,0,12,0,0};
|
|
|
|
/* Dissect message parts */
|
|
static int dissect_tb_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
dissector_handle_t *data_handle,
|
|
void *data);
|
|
|
|
static int dissect_macd_pdu_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, guint16 length, guint16 number_of_pdus, struct fp_info *p_fp_info,
|
|
void *data);
|
|
static int dissect_macd_pdu_data_type_2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, guint16 length, guint16 number_of_pdus, struct fp_info * fpi,
|
|
void *data);
|
|
|
|
static int dissect_crci_bits(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
fp_info *p_fp_info, int offset);
|
|
static void dissect_spare_extension_and_crc(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree, guint8 dch_crc_present,
|
|
int offset, guint header_length);
|
|
/* Dissect common control messages */
|
|
static int dissect_common_outer_loop_power_control(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static int dissect_common_timing_adjustment(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static int dissect_common_dl_node_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_common_ul_node_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_common_dl_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset,
|
|
struct fp_info *p_fp_info);
|
|
static int dissect_common_ul_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset,
|
|
struct fp_info *p_fp_info);
|
|
static int dissect_common_timing_advance(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_hsdpa_capacity_request(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_hsdpa_capacity_allocation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset,
|
|
struct fp_info *p_fp_info);
|
|
static int dissect_hsdpa_capacity_allocation_type_2(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset);
|
|
static void dissect_common_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static int dissect_common_dynamic_pusch_assignment(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset);
|
|
|
|
/* Dissect common channel types */
|
|
static void dissect_rach_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data);
|
|
static void dissect_fach_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data);
|
|
static void dissect_dsch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static void dissect_usch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static void dissect_pch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data);
|
|
static void dissect_cpch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static void dissect_bch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static void dissect_iur_dsch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info);
|
|
static void dissect_hsdsch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data);
|
|
static void dissect_hsdsch_type_2_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data);
|
|
static void dissect_hsdsch_common_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset,
|
|
struct fp_info *p_fp_info,
|
|
void *data);
|
|
|
|
/* Dissect DCH control messages */
|
|
static int dissect_dch_timing_adjustment(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_dch_rx_timing_deviation(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset,
|
|
struct fp_info *p_fp_info);
|
|
static int dissect_dch_dl_synchronisation(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_dch_ul_synchronisation(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_dch_outer_loop_power_control(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_dch_dl_node_synchronisation(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_dch_ul_node_synchronisation(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_dch_radio_interface_parameter_update(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
static int dissect_dch_timing_advance(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset, struct fp_info *p_fp_info);
|
|
static int dissect_dch_tnl_congestion_indication(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset);
|
|
|
|
|
|
static void dissect_dch_control_frame(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
|
|
int offset, struct fp_info *p_fp_info);
|
|
|
|
|
|
/* Dissect a DCH channel */
|
|
static void dissect_dch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data);
|
|
|
|
/* Dissect dedicated channels */
|
|
static void dissect_e_dch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
gboolean is_common,
|
|
void *data);
|
|
|
|
static void dissect_e_dch_t2_or_common_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
int number_of_subframes,
|
|
gboolean is_common,
|
|
guint16 header_crc,
|
|
proto_item * header_crc_pi,
|
|
void *data);
|
|
|
|
/* Main dissection function */
|
|
static int dissect_fp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data);
|
|
|
|
/*
|
|
* CRNC sends data downlink on uplink parameters.
|
|
*/
|
|
void
|
|
set_umts_fp_conv_data(conversation_t *conversation, umts_fp_conversation_info_t *umts_fp_conversation_info)
|
|
{
|
|
|
|
if (conversation == NULL) {
|
|
return;
|
|
}
|
|
|
|
conversation_add_proto_data(conversation, proto_fp, umts_fp_conversation_info);
|
|
}
|
|
|
|
|
|
static int
|
|
get_tb_count(struct fp_info *p_fp_info)
|
|
{
|
|
int chan, tb_count = 0;
|
|
for (chan = 0; chan < p_fp_info->num_chans; chan++) {
|
|
tb_count += p_fp_info->chan_num_tbs[chan];
|
|
}
|
|
return tb_count;
|
|
}
|
|
|
|
static gboolean verify_control_frame_crc(tvbuff_t * tvb, packet_info * pinfo, proto_item * pi, guint16 frame_crc)
|
|
{
|
|
guint8 crc = 0;
|
|
guint8 * data = NULL;
|
|
/* Get data. */
|
|
data = (guint8 *)tvb_memdup(wmem_packet_scope(), tvb, 0, tvb_reported_length(tvb));
|
|
/* Include only FT flag bit in CRC calculation. */
|
|
data[0] = data[0] & 1;
|
|
/* Calculate crc7 sum. */
|
|
crc = crc7update(0, data, tvb_reported_length(tvb));
|
|
crc = crc7finalize(crc); /* finalize crc */
|
|
if (frame_crc == crc) {
|
|
proto_item_append_text(pi, " [correct]");
|
|
return TRUE;
|
|
} else {
|
|
proto_item_append_text(pi, " [incorrect, should be 0x%x]", crc);
|
|
expert_add_info(pinfo, pi, &ei_fp_bad_header_checksum);
|
|
return FALSE;
|
|
}
|
|
}
|
|
static gboolean verify_header_crc(tvbuff_t * tvb, packet_info * pinfo, proto_item * pi, guint16 header_crc, guint header_length)
|
|
{
|
|
guint8 crc = 0;
|
|
guint8 * data = NULL;
|
|
/* Get data of header with first byte removed. */
|
|
data = (guint8 *)tvb_memdup(wmem_packet_scope(), tvb, 1, header_length-1);
|
|
/* Calculate crc7 sum. */
|
|
crc = crc7update(0, data, header_length-1);
|
|
crc = crc7finalize(crc); /* finalize crc */
|
|
if (header_crc == crc) {
|
|
proto_item_append_text(pi, " [correct]");
|
|
return TRUE;
|
|
} else {
|
|
proto_item_append_text(pi, " [incorrect, should be 0x%x]", crc);
|
|
expert_add_info(pinfo, pi, &ei_fp_bad_header_checksum);
|
|
return FALSE;
|
|
}
|
|
}
|
|
static gboolean verify_header_crc_edch(tvbuff_t * tvb, packet_info * pinfo, proto_item * pi, guint16 header_crc, guint header_length)
|
|
{
|
|
guint16 crc = 0;
|
|
guint8 * data = NULL;
|
|
/* First create new subset of header with first byte removed. */
|
|
tvbuff_t * headtvb = tvb_new_subset_length(tvb, 1, header_length-1);
|
|
/* Get data of header with first byte removed. */
|
|
data = (guint8 *)tvb_memdup(wmem_packet_scope(), headtvb, 0, header_length-1);
|
|
/* Remove first 4 bits of the remaining data which are Header CRC cont. */
|
|
data[0] = data[0] & 0x0f;
|
|
crc = crc11_307_noreflect_noxor(data, header_length-1);
|
|
if (header_crc == crc) {
|
|
proto_item_append_text(pi, " [correct]");
|
|
return TRUE;
|
|
} else {
|
|
proto_item_append_text(pi, " [incorrect, should be 0x%x]", crc);
|
|
expert_add_info(pinfo, pi, &ei_fp_bad_header_checksum);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* Dissect the TBs of a UL data frame*/
|
|
static int
|
|
dissect_tb_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
dissector_handle_t *data_handle, void *data)
|
|
{
|
|
int chan, num_tbs = 0;
|
|
int bit_offset = 0;
|
|
int crci_bit_offset = (offset+1)<<3; /* Current offset + Quality estimate of 1 byte at the end*/
|
|
guint data_bits = 0;
|
|
guint8 crci_bit = 0;
|
|
proto_item *tree_ti = NULL;
|
|
proto_tree *data_tree = NULL;
|
|
gboolean dissected = FALSE;
|
|
|
|
if (tree) {
|
|
/* Add data subtree */
|
|
tree_ti = proto_tree_add_item(tree, hf_fp_data, tvb, offset, -1, ENC_NA);
|
|
proto_item_set_text(tree_ti, "TB data for %u chans", p_fp_info->num_chans);
|
|
data_tree = proto_item_add_subtree(tree_ti, ett_fp_data);
|
|
}
|
|
|
|
/* Calculate offset to CRCI bits */
|
|
|
|
if (p_fp_info->is_uplink) {
|
|
for (chan=0; chan < p_fp_info->num_chans; chan++) {
|
|
int n;
|
|
for (n=0; n < p_fp_info->chan_num_tbs[chan]; n++) {
|
|
/* Advance bit offset */
|
|
crci_bit_offset += p_fp_info->chan_tf_size[chan];
|
|
/* Pad out to next byte */
|
|
if (crci_bit_offset % 8) {
|
|
crci_bit_offset += (8 - (crci_bit_offset % 8));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* Now for the TB data */
|
|
for (chan=0; chan < p_fp_info->num_chans; chan++) {
|
|
int n;
|
|
p_fp_info->cur_chan = chan; /*Set current channel?*/
|
|
/* Clearly show channels with no TBs */
|
|
if (p_fp_info->chan_num_tbs[chan] == 0) {
|
|
proto_item *no_tb_ti = proto_tree_add_uint(data_tree, hf_fp_chan_zero_tbs, tvb,
|
|
offset+(bit_offset/8),
|
|
0, chan+1);
|
|
proto_item_append_text(no_tb_ti, " (of size %d)",
|
|
p_fp_info->chan_tf_size[chan]);
|
|
PROTO_ITEM_SET_GENERATED(no_tb_ti);
|
|
}
|
|
|
|
/* Show TBs from non-empty channels */
|
|
pinfo->fd->subnum = chan; /* set subframe number to current TB */
|
|
for (n=0; n < p_fp_info->chan_num_tbs[chan]; n++) {
|
|
|
|
proto_item *ti;
|
|
p_fp_info->cur_tb = chan; /*Set current transport block?*/
|
|
if (data_tree) {
|
|
ti = proto_tree_add_item(data_tree, hf_fp_tb, tvb,
|
|
offset + (bit_offset/8),
|
|
((bit_offset % 8) + p_fp_info->chan_tf_size[chan] + 7) / 8,
|
|
ENC_NA);
|
|
proto_item_set_text(ti, "TB (chan %u, tb %u, %u bits)",
|
|
chan+1, n+1, p_fp_info->chan_tf_size[chan]);
|
|
}
|
|
|
|
if (preferences_call_mac_dissectors && data_handle &&
|
|
(p_fp_info->chan_tf_size[chan] > 0)) {
|
|
tvbuff_t *next_tvb;
|
|
proto_item *item;
|
|
/* If this is DL we should not care about crci bits (since they don't exists)*/
|
|
if (p_fp_info->is_uplink) {
|
|
|
|
|
|
if ( p_fp_info->channel == CHANNEL_RACH_FDD) { /*In RACH we don't have any QE field, hence go back 8 bits.*/
|
|
crci_bit = tvb_get_bits8(tvb, crci_bit_offset+n-8, 1);
|
|
item = proto_tree_add_item(data_tree, hf_fp_crci[n%8], tvb, (crci_bit_offset+n-8)/8, 1, ENC_BIG_ENDIAN);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
} else {
|
|
crci_bit = tvb_get_bits8(tvb, crci_bit_offset+n, 1);
|
|
item = proto_tree_add_item(data_tree, hf_fp_crci[n%8], tvb, (crci_bit_offset+n)/8, 1, ENC_BIG_ENDIAN);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
}
|
|
|
|
if (crci_bit == 0 || !p_fp_info->is_uplink) {
|
|
next_tvb = tvb_new_subset_length(tvb, offset + bit_offset/8,
|
|
((bit_offset % 8) + p_fp_info->chan_tf_size[chan] + 7) / 8);
|
|
|
|
|
|
/****************/
|
|
/* TODO: maybe this decision can be based only on info available in fp_info */
|
|
call_dissector_with_data(*data_handle, next_tvb, pinfo, top_level_tree, data);
|
|
dissected = TRUE;
|
|
} else {
|
|
proto_tree_add_expert(tree, pinfo, &ei_fp_crci_no_subdissector, tvb, offset + bit_offset/8,
|
|
((bit_offset % 8) + p_fp_info->chan_tf_size[chan] + 7) / 8);
|
|
}
|
|
|
|
}
|
|
num_tbs++;
|
|
|
|
/* Advance bit offset */
|
|
bit_offset += p_fp_info->chan_tf_size[chan];
|
|
data_bits += p_fp_info->chan_tf_size[chan];
|
|
|
|
/* Pad out to next byte */
|
|
if (bit_offset % 8) {
|
|
bit_offset += (8 - (bit_offset % 8));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dissected == FALSE) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "(%u bits in %u tbs)",
|
|
data_bits, num_tbs);
|
|
}
|
|
|
|
/* Data tree should cover entire length */
|
|
if (data_tree) {
|
|
proto_item_set_len(tree_ti, bit_offset/8);
|
|
proto_item_append_text(tree_ti, " (%u bits in %u tbs)", data_bits, num_tbs);
|
|
}
|
|
|
|
/* Move offset past TBs (we know it's already padded out to next byte) */
|
|
offset += (bit_offset / 8);
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
/* Dissect the MAC-d PDUs of an HS-DSCH (type 1) frame.
|
|
Length is in bits, and payload is offset by 4 bits of padding */
|
|
static int
|
|
dissect_macd_pdu_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, guint16 length, guint16 number_of_pdus,
|
|
struct fp_info *p_fp_info, void *data)
|
|
{
|
|
int pdu;
|
|
int bit_offset = 0;
|
|
proto_item *pdus_ti = NULL;
|
|
proto_tree *data_tree = NULL;
|
|
gboolean dissected = FALSE;
|
|
|
|
/* Add data subtree */
|
|
if (tree) {
|
|
pdus_ti = proto_tree_add_item(tree, hf_fp_data, tvb, offset, -1, ENC_NA);
|
|
proto_item_set_text(pdus_ti, "%u MAC-d PDUs of %u bits", number_of_pdus, length);
|
|
data_tree = proto_item_add_subtree(pdus_ti, ett_fp_data);
|
|
}
|
|
|
|
/* Now for the PDUs */
|
|
for (pdu=0; pdu < number_of_pdus; pdu++) {
|
|
proto_item *pdu_ti;
|
|
|
|
if (data_tree) {
|
|
/* Show 4 bits padding at start of PDU */
|
|
proto_tree_add_item(data_tree, hf_fp_hsdsch_data_padding, tvb, offset+(bit_offset/8), 1, ENC_BIG_ENDIAN);
|
|
|
|
}
|
|
bit_offset += 4;
|
|
|
|
/* Data bytes! */
|
|
if (data_tree) {
|
|
pdu_ti = proto_tree_add_item(data_tree, hf_fp_mac_d_pdu, tvb,
|
|
offset + (bit_offset/8),
|
|
((bit_offset % 8) + length + 7) / 8,
|
|
ENC_NA);
|
|
proto_item_set_text(pdu_ti, "MAC-d PDU (PDU %u)", pdu+1);
|
|
}
|
|
|
|
pinfo->fd->subnum = pdu; /* set subframe number to current TB */
|
|
p_fp_info->cur_tb = pdu; /*Set TB (PDU) index correctly*/
|
|
if (preferences_call_mac_dissectors) {
|
|
tvbuff_t *next_tvb;
|
|
next_tvb = tvb_new_subset_length_caplen(tvb, offset + bit_offset/8,
|
|
((bit_offset % 8) + length + 7)/8, -1);
|
|
call_dissector_with_data(mac_fdd_hsdsch_handle, next_tvb, pinfo, top_level_tree, data);
|
|
dissected = TRUE;
|
|
}
|
|
|
|
/* Advance bit offset */
|
|
bit_offset += length;
|
|
|
|
/* Pad out to next byte */
|
|
if (bit_offset % 8) {
|
|
bit_offset += (8 - (bit_offset % 8));
|
|
}
|
|
}
|
|
|
|
/* Data tree should cover entire length */
|
|
proto_item_set_len(pdus_ti, bit_offset/8);
|
|
|
|
/* Move offset past PDUs (we know it's already padded out to next byte) */
|
|
offset += (bit_offset / 8);
|
|
|
|
/* Show summary in info column */
|
|
if (dissected == FALSE) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %u PDUs of %u bits",
|
|
number_of_pdus, length);
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
/* Dissect the MAC-d PDUs of an HS-DSCH (type 2) frame.
|
|
Length is in bytes, and payload is byte-aligned (no padding) */
|
|
static int
|
|
dissect_macd_pdu_data_type_2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, guint16 length, guint16 number_of_pdus,
|
|
struct fp_info *fpi, void *data)
|
|
{
|
|
int pdu;
|
|
proto_item *pdus_ti = NULL;
|
|
proto_tree *data_tree = NULL;
|
|
int first_offset = offset;
|
|
gboolean dissected = FALSE;
|
|
|
|
/* Add data subtree */
|
|
if (tree) {
|
|
pdus_ti = proto_tree_add_item(tree, hf_fp_data, tvb, offset, -1, ENC_NA);
|
|
proto_item_set_text(pdus_ti, "%u MAC-d PDUs of %u bytes", number_of_pdus, length);
|
|
data_tree = proto_item_add_subtree(pdus_ti, ett_fp_data);
|
|
}
|
|
|
|
/* Now for the PDUs */
|
|
for (pdu=0; pdu < number_of_pdus; pdu++) {
|
|
proto_item *pdu_ti;
|
|
|
|
/* Data bytes! */
|
|
if (data_tree) {
|
|
pdu_ti = proto_tree_add_item(data_tree, hf_fp_mac_d_pdu, tvb,
|
|
offset, length, ENC_NA);
|
|
proto_item_set_text(pdu_ti, "MAC-d PDU (PDU %u)", pdu+1);
|
|
|
|
}
|
|
|
|
if (preferences_call_mac_dissectors) {
|
|
|
|
tvbuff_t *next_tvb = tvb_new_subset_length(tvb, offset, length);
|
|
|
|
|
|
fpi->cur_tb = pdu; /*Set proper pdu index for MAC and higher layers*/
|
|
pinfo->fd->subnum = pdu;
|
|
call_dissector_with_data(mac_fdd_hsdsch_handle, next_tvb, pinfo, top_level_tree, data);
|
|
dissected = TRUE;
|
|
}
|
|
|
|
/* Advance offset */
|
|
offset += length;
|
|
}
|
|
|
|
/* Data tree should cover entire length */
|
|
proto_item_set_len(pdus_ti, offset-first_offset);
|
|
|
|
/* Show summary in info column */
|
|
if (!dissected) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %u PDUs of %u bits",
|
|
number_of_pdus, length*8);
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* Dissect CRCI bits (uplink) */
|
|
static int
|
|
dissect_crci_bits(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
fp_info *p_fp_info, int offset)
|
|
{
|
|
int n, num_tbs;
|
|
proto_item *ti = NULL;
|
|
proto_tree *crcis_tree = NULL;
|
|
guint errors = 0;
|
|
|
|
num_tbs = get_tb_count(p_fp_info);
|
|
|
|
|
|
/* Add CRCIs subtree */
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, hf_fp_crcis, tvb, offset, (num_tbs+7)/8, ENC_NA);
|
|
proto_item_set_text(ti, "CRCI bits for %u tbs", num_tbs);
|
|
crcis_tree = proto_item_add_subtree(ti, ett_fp_crcis);
|
|
}
|
|
|
|
/* CRCIs */
|
|
for (n=0; n < num_tbs; n++) {
|
|
int bit = (tvb_get_guint8(tvb, offset+(n/8)) >> (7-(n%8))) & 0x01;
|
|
proto_tree_add_item(crcis_tree, hf_fp_crci[n%8], tvb, offset+(n/8),
|
|
1, ENC_BIG_ENDIAN);
|
|
|
|
if (bit == 1) {
|
|
errors++;
|
|
expert_add_info(pinfo, ti, &ei_fp_crci_error_bit_set_for_tb);
|
|
}
|
|
}
|
|
|
|
if (tree) {
|
|
/* Highlight range of bytes covered by indicator bits */
|
|
proto_item_set_len(ti, (num_tbs+7) / 8);
|
|
|
|
/* Show error count in root text */
|
|
proto_item_append_text(ti, " (%u errors)", errors);
|
|
}
|
|
|
|
offset += ((num_tbs+7) / 8);
|
|
return offset;
|
|
}
|
|
|
|
|
|
static void
|
|
dissect_spare_extension_and_crc(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree, guint8 dch_crc_present,
|
|
int offset, guint header_length)
|
|
{
|
|
int crc_size = 0;
|
|
int remain = tvb_captured_length_remaining(tvb, offset);
|
|
|
|
/* Payload CRC (optional) */
|
|
if ((dch_crc_present == 1) || ((dch_crc_present == 2) && (remain >= 2))) {
|
|
crc_size = 2;
|
|
}
|
|
|
|
if (remain > crc_size) {
|
|
proto_item *ti;
|
|
ti = proto_tree_add_item(tree, hf_fp_spare_extension, tvb,
|
|
offset, remain-crc_size, ENC_NA);
|
|
proto_item_append_text(ti, " (%u octets)", remain-crc_size);
|
|
expert_add_info_format(pinfo, ti, &ei_fp_spare_extension, "Spare Extension present (%u bytes)", remain-crc_size);
|
|
offset += remain-crc_size;
|
|
}
|
|
|
|
if (crc_size) {
|
|
proto_item * pi = proto_tree_add_item(tree, hf_fp_payload_crc, tvb, offset, crc_size,
|
|
ENC_BIG_ENDIAN);
|
|
if (preferences_payload_checksum) {
|
|
guint16 calc_crc, read_crc;
|
|
if ((guint)offset > header_length) {
|
|
guint8 * data = (guint8 *)tvb_memdup(wmem_packet_scope(), tvb, header_length, offset-header_length);
|
|
calc_crc = crc16_8005_noreflect_noxor(data, offset-header_length);
|
|
} else {
|
|
calc_crc = 0;
|
|
}
|
|
read_crc = tvb_get_bits16(tvb, offset*8, 16, ENC_BIG_ENDIAN);
|
|
|
|
if (calc_crc == read_crc) {
|
|
proto_item_append_text(pi, " [correct]");
|
|
} else {
|
|
proto_item_append_text(pi, " [incorrect, should be 0x%x]", calc_crc);
|
|
expert_add_info(pinfo, pi, &ei_fp_bad_payload_checksum);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/***********************************************************/
|
|
/* Common control message types */
|
|
|
|
static int
|
|
dissect_common_outer_loop_power_control(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb,
|
|
int offset, struct fp_info *p_fp_info _U_)
|
|
{
|
|
return dissect_dch_outer_loop_power_control(tree, pinfo, tvb, offset);
|
|
}
|
|
|
|
|
|
static int
|
|
dissect_common_timing_adjustment(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
if (p_fp_info->channel != CHANNEL_PCH) {
|
|
guint32 cfn;
|
|
gint16 toa;
|
|
|
|
/* CFN control */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
/* ToA */
|
|
toa = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_toa, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CFN=%u, ToA=%d", cfn, toa);
|
|
}
|
|
else {
|
|
guint32 cfn;
|
|
gint32 toa;
|
|
|
|
/* PCH CFN is 12 bits */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_pch_cfn, tvb, offset, 2, ENC_BIG_ENDIAN, &cfn);
|
|
offset += 2;
|
|
|
|
/* 4 bits of padding follow... */
|
|
|
|
/* 20 bits of ToA (followed by 4 padding bits) */
|
|
toa = ((int)(tvb_get_ntoh24(tvb, offset) << 8)) / 4096;
|
|
proto_tree_add_int(tree, hf_fp_pch_toa, tvb, offset, 3, toa);
|
|
offset += 3;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CFN=%u, ToA=%d", cfn, toa);
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_common_dl_node_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset)
|
|
{
|
|
/* T1 (3 bytes) */
|
|
guint32 encoded = tvb_get_ntoh24(tvb, offset);
|
|
float t1 = encoded * (float)0.125;
|
|
proto_tree_add_float_format_value(tree, hf_fp_t1, tvb, offset, 3, t1, "%.3f ms (%u)", t1, encoded);
|
|
offset += 3;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " T1=%.3f", t1);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_common_ul_node_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset)
|
|
{
|
|
guint32 encoded;
|
|
float t1, t2, t3;
|
|
|
|
/* T1 (3 bytes) */
|
|
encoded = tvb_get_ntoh24(tvb, offset);
|
|
t1 = encoded * (float)0.125;
|
|
proto_tree_add_float_format_value(tree, hf_fp_t1, tvb, offset, 3, t1, "%.3f ms (%u)", t1, encoded);
|
|
offset += 3;
|
|
|
|
/* T2 (3 bytes) */
|
|
encoded = tvb_get_ntoh24(tvb, offset);
|
|
t2 = encoded * (float)0.125;
|
|
proto_tree_add_float_format_value(tree, hf_fp_t2, tvb, offset, 3, t2, "%.3f ms (%u)", t2, encoded);
|
|
offset += 3;
|
|
|
|
/* T3 (3 bytes) */
|
|
encoded = tvb_get_ntoh24(tvb, offset);
|
|
t3 = encoded * (float)0.125;
|
|
proto_tree_add_float_format_value(tree, hf_fp_t3, tvb, offset, 3, t3, "%.3f ms (%u)", t3, encoded);
|
|
offset += 3;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " T1=%.3f T2=%.3f, T3=%.3f",
|
|
t1, t2, t3);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_common_dl_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset, struct fp_info *p_fp_info)
|
|
{
|
|
guint32 cfn;
|
|
|
|
if (p_fp_info->channel != CHANNEL_PCH) {
|
|
/* CFN control */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
}
|
|
else {
|
|
/* PCH CFN is 12 bits */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_pch_cfn, tvb, offset, 2, ENC_BIG_ENDIAN, &cfn);
|
|
|
|
/* 4 bits of padding follow... */
|
|
offset += 2;
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CFN=%u", cfn);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_common_ul_synchronisation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset, struct fp_info *p_fp_info)
|
|
{
|
|
return dissect_common_timing_adjustment(pinfo, tree, tvb, offset, p_fp_info);
|
|
}
|
|
|
|
static int
|
|
dissect_common_timing_advance(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset)
|
|
{
|
|
guint32 cfn;
|
|
guint16 timing_advance;
|
|
|
|
/* CFN control */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
/* Timing Advance */
|
|
timing_advance = (tvb_get_guint8(tvb, offset) & 0x3f) * 4;
|
|
proto_tree_add_uint(tree, hf_fp_timing_advance, tvb, offset, 1, timing_advance);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CFN = %u, TA = %u",
|
|
cfn, timing_advance);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_hsdpa_capacity_request(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset)
|
|
{
|
|
guint8 priority;
|
|
guint16 user_buffer_size;
|
|
|
|
/* CmCH-PI */
|
|
priority = (tvb_get_guint8(tvb, offset) & 0x0f);
|
|
proto_tree_add_item(tree, hf_fp_cmch_pi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* User buffer size */
|
|
user_buffer_size = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_user_buffer_size, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CmCH-PI=%u User-Buffer-Size=%u",
|
|
priority, user_buffer_size);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_hsdpa_capacity_allocation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset,
|
|
struct fp_info *p_fp_info)
|
|
{
|
|
proto_item *ti;
|
|
proto_item *rate_ti;
|
|
guint16 max_pdu_length;
|
|
guint8 repetition_period;
|
|
guint8 interval;
|
|
guint64 credits;
|
|
|
|
/* Congestion status (introduced sometime during R6...) */
|
|
if ((p_fp_info->release == 6) || (p_fp_info->release == 7)) {
|
|
proto_tree_add_bits_item(tree, hf_fp_congestion_status, tvb,
|
|
offset*8 + 2, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/* CmCH-PI */
|
|
proto_tree_add_item(tree, hf_fp_cmch_pi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Max MAC-d PDU length (13 bits) */
|
|
max_pdu_length = tvb_get_ntohs(tvb, offset) >> 3;
|
|
proto_tree_add_item(tree, hf_fp_hsdsch_max_macd_pdu_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* HS-DSCH credits (11 bits) */
|
|
ti = proto_tree_add_bits_ret_val(tree, hf_fp_hsdsch_credits, tvb,
|
|
offset*8 + 5, 11, &credits, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* Interesting values */
|
|
if (credits == 0) {
|
|
proto_item_append_text(ti, " (stop transmission)");
|
|
expert_add_info(pinfo, ti, &ei_fp_stop_hsdpa_transmission);
|
|
}
|
|
if (credits == 2047) {
|
|
proto_item_append_text(ti, " (unlimited)");
|
|
}
|
|
|
|
/* HS-DSCH Interval */
|
|
interval = tvb_get_guint8(tvb, offset);
|
|
ti = proto_tree_add_uint(tree, hf_fp_hsdsch_interval, tvb, offset, 1, interval*10);
|
|
offset++;
|
|
if (interval == 0) {
|
|
proto_item_append_text(ti, " (none of the credits shall be used)");
|
|
}
|
|
|
|
/* HS-DSCH Repetition period */
|
|
repetition_period = tvb_get_guint8(tvb, offset);
|
|
ti = proto_tree_add_item(tree, hf_fp_hsdsch_repetition_period, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
if (repetition_period == 0) {
|
|
proto_item_append_text(ti, " (unlimited repetition period)");
|
|
}
|
|
|
|
/* Calculated and show effective rate enabled */
|
|
if (credits == 2047) {
|
|
rate_ti = proto_tree_add_item(tree, hf_fp_hsdsch_unlimited_rate, tvb, 0, 0, ENC_NA);
|
|
PROTO_ITEM_SET_GENERATED(rate_ti);
|
|
}
|
|
else {
|
|
if (interval != 0) {
|
|
/* Cast on credits is safe, since we know it won't exceed 10^11 */
|
|
rate_ti = proto_tree_add_uint(tree, hf_fp_hsdsch_calculated_rate, tvb, 0, 0,
|
|
(guint16)credits * max_pdu_length * (1000 / (interval*10)));
|
|
PROTO_ITEM_SET_GENERATED(rate_ti);
|
|
}
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" Max-PDU-len=%u Credits=%u Interval=%u Rep-Period=%u",
|
|
max_pdu_length, (guint16)credits, interval, repetition_period);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_hsdpa_capacity_allocation_type_2(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset)
|
|
{
|
|
proto_item *ti;
|
|
proto_item *rate_ti;
|
|
guint16 max_pdu_length;
|
|
guint8 repetition_period;
|
|
guint8 interval;
|
|
guint16 credits;
|
|
|
|
/* Congestion status */
|
|
proto_tree_add_bits_item(tree, hf_fp_congestion_status, tvb,
|
|
offset*8 + 2, 2, ENC_BIG_ENDIAN);
|
|
|
|
/* CmCH-PI */
|
|
proto_tree_add_item(tree, hf_fp_cmch_pi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* 5 spare bits follow here */
|
|
|
|
/* Max MAC-d/c PDU length (11 bits) */
|
|
max_pdu_length = tvb_get_ntohs(tvb, offset) & 0x7ff;
|
|
proto_tree_add_item(tree, hf_fp_hsdsch_max_macdc_pdu_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* HS-DSCH credits (16 bits) */
|
|
credits = (tvb_get_ntohs(tvb, offset));
|
|
ti = proto_tree_add_uint(tree, hf_fp_hsdsch_credits, tvb,
|
|
offset, 2, credits);
|
|
offset += 2;
|
|
|
|
/* Interesting values */
|
|
if (credits == 0) {
|
|
proto_item_append_text(ti, " (stop transmission)");
|
|
expert_add_info(pinfo, ti, &ei_fp_stop_hsdpa_transmission);
|
|
}
|
|
if (credits == 65535) {
|
|
proto_item_append_text(ti, " (unlimited)");
|
|
}
|
|
|
|
/* HS-DSCH Interval */
|
|
interval = tvb_get_guint8(tvb, offset);
|
|
ti = proto_tree_add_uint(tree, hf_fp_hsdsch_interval, tvb, offset, 1, interval*10);
|
|
offset++;
|
|
if (interval == 0) {
|
|
proto_item_append_text(ti, " (none of the credits shall be used)");
|
|
}
|
|
|
|
/* HS-DSCH Repetition period */
|
|
repetition_period = tvb_get_guint8(tvb, offset);
|
|
ti = proto_tree_add_item(tree, hf_fp_hsdsch_repetition_period, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
if (repetition_period == 0) {
|
|
proto_item_append_text(ti, " (unlimited repetition period)");
|
|
}
|
|
|
|
/* Calculated and show effective rate enabled */
|
|
if (credits == 65535) {
|
|
rate_ti = proto_tree_add_item(tree, hf_fp_hsdsch_unlimited_rate, tvb, 0, 0, ENC_NA);
|
|
PROTO_ITEM_SET_GENERATED(rate_ti);
|
|
}
|
|
else {
|
|
if (interval != 0) {
|
|
rate_ti = proto_tree_add_uint(tree, hf_fp_hsdsch_calculated_rate, tvb, 0, 0,
|
|
credits * max_pdu_length * (1000 / (interval*10)));
|
|
PROTO_ITEM_SET_GENERATED(rate_ti);
|
|
}
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" Max-PDU-len=%u Credits=%u Interval=%u Rep-Period=%u",
|
|
max_pdu_length, credits, interval, repetition_period);
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
dissect_common_dynamic_pusch_assignment(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset)
|
|
{
|
|
guint8 pusch_set_id;
|
|
guint8 activation_cfn;
|
|
guint8 duration;
|
|
|
|
/* PUSCH Set Id */
|
|
pusch_set_id = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_pusch_set_id, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Activation CFN */
|
|
activation_cfn = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_activation_cfn, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Duration */
|
|
duration = tvb_get_guint8(tvb, offset) * 10;
|
|
proto_tree_add_uint(tree, hf_fp_duration, tvb, offset, 1, duration);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" PUSCH Set Id=%u Activation CFN=%u Duration=%u",
|
|
pusch_set_id, activation_cfn, duration);
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Dissect the control part of a common channel message */
|
|
static void
|
|
dissect_common_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
/* Common control frame type */
|
|
guint8 control_frame_type = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_common_control_frame_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str_const(control_frame_type, common_control_frame_type_vals, "Unknown"));
|
|
|
|
/* Frame-type specific dissection */
|
|
switch (control_frame_type) {
|
|
case COMMON_OUTER_LOOP_POWER_CONTROL:
|
|
/*offset =*/ dissect_common_outer_loop_power_control(pinfo, tree, tvb, offset, p_fp_info);
|
|
break;
|
|
case COMMON_TIMING_ADJUSTMENT:
|
|
/*offset =*/ dissect_common_timing_adjustment(pinfo, tree, tvb, offset, p_fp_info);
|
|
break;
|
|
case COMMON_DL_SYNCHRONISATION:
|
|
/*offset =*/ dissect_common_dl_synchronisation(pinfo, tree, tvb, offset, p_fp_info);
|
|
break;
|
|
case COMMON_UL_SYNCHRONISATION:
|
|
/*offset =*/ dissect_common_ul_synchronisation(pinfo, tree, tvb, offset, p_fp_info);
|
|
break;
|
|
case COMMON_DL_NODE_SYNCHRONISATION:
|
|
/*offset =*/ dissect_common_dl_node_synchronisation(pinfo, tree, tvb, offset);
|
|
break;
|
|
case COMMON_UL_NODE_SYNCHRONISATION:
|
|
/*offset =*/ dissect_common_ul_node_synchronisation(pinfo, tree, tvb, offset);
|
|
break;
|
|
case COMMON_DYNAMIC_PUSCH_ASSIGNMENT:
|
|
/*offset =*/ dissect_common_dynamic_pusch_assignment(pinfo, tree, tvb, offset);
|
|
break;
|
|
case COMMON_TIMING_ADVANCE:
|
|
/*offset =*/ dissect_common_timing_advance(pinfo, tree, tvb, offset);
|
|
break;
|
|
case COMMON_HS_DSCH_Capacity_Request:
|
|
/*offset =*/ dissect_hsdpa_capacity_request(pinfo, tree, tvb, offset);
|
|
break;
|
|
case COMMON_HS_DSCH_Capacity_Allocation:
|
|
/*offset =*/ dissect_hsdpa_capacity_allocation(pinfo, tree, tvb, offset, p_fp_info);
|
|
break;
|
|
case COMMON_HS_DSCH_Capacity_Allocation_Type_2:
|
|
/*offset =*/ dissect_hsdpa_capacity_allocation_type_2(pinfo, tree, tvb, offset);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* There is no Spare Extension nor payload crc in common control!? */
|
|
/* dissect_spare_extension_and_crc(tvb, pinfo, tree, 0, offset);
|
|
*/
|
|
}
|
|
|
|
|
|
|
|
/**************************/
|
|
/* Dissect a RACH channel */
|
|
static void
|
|
dissect_rach_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info, void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
guint header_length = 0;
|
|
|
|
/* Header CRC */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
}
|
|
else {
|
|
guint8 cfn;
|
|
guint32 encoded;
|
|
guint32 propagation_delay = 0;
|
|
proto_item *propagation_delay_ti = NULL;
|
|
guint32 received_sync_ul_timing_deviation = 0;
|
|
proto_item *received_sync_ul_timing_deviation_ti = NULL;
|
|
proto_item *rx_timing_deviation_ti = NULL;
|
|
guint16 rx_timing_deviation = 0;
|
|
|
|
/* DATA */
|
|
|
|
/* CFN */
|
|
cfn = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "CFN=%03u ", cfn);
|
|
|
|
/* TFI */
|
|
proto_tree_add_item(tree, hf_fp_tfi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
if (p_fp_info->channel == CHANNEL_RACH_FDD) {
|
|
/* Propagation delay */
|
|
encoded = tvb_get_guint8(tvb, offset);
|
|
propagation_delay = encoded * 3;
|
|
propagation_delay_ti = proto_tree_add_uint_format(tree, hf_fp_propagation_delay, tvb, offset, 1,
|
|
propagation_delay, "%u chips (%u)",
|
|
propagation_delay, encoded);
|
|
offset++;
|
|
}
|
|
|
|
/* Should be TDD 3.84 or 7.68 */
|
|
if (p_fp_info->channel == CHANNEL_RACH_TDD) {
|
|
/* Rx Timing Deviation */
|
|
rx_timing_deviation = tvb_get_guint8(tvb, offset);
|
|
rx_timing_deviation_ti = proto_tree_add_item(tree, hf_fp_rx_timing_deviation, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
|
|
if (p_fp_info->channel == CHANNEL_RACH_TDD_128) {
|
|
/* Received SYNC UL Timing Deviation */
|
|
received_sync_ul_timing_deviation = tvb_get_guint8(tvb, offset);
|
|
received_sync_ul_timing_deviation_ti =
|
|
proto_tree_add_item(tree, hf_fp_received_sync_ul_timing_deviation, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
|
|
header_length = offset;
|
|
|
|
/* TB data */
|
|
offset = dissect_tb_data(tvb, pinfo, tree, offset, p_fp_info, &mac_fdd_rach_handle, data);
|
|
|
|
/* CRCIs */
|
|
offset = dissect_crci_bits(tvb, pinfo, tree, p_fp_info, offset);
|
|
|
|
/* Info introduced in R6 */
|
|
/* only check if it looks as if they are present */
|
|
if (((p_fp_info->release == 6) || (p_fp_info->release == 7)) &&
|
|
(tvb_reported_length_remaining(tvb, offset) > 2))
|
|
{
|
|
int n;
|
|
guint8 flags;
|
|
/* guint8 flag_bytes = 0; */
|
|
|
|
gboolean cell_portion_id_present = FALSE;
|
|
gboolean ext_propagation_delay_present = FALSE;
|
|
gboolean angle_of_arrival_present = FALSE;
|
|
gboolean ext_rx_sync_ul_timing_deviation_present = FALSE;
|
|
gboolean ext_rx_timing_deviation_present = FALSE;
|
|
|
|
/* New IE flags (assume mandatory for now) */
|
|
do {
|
|
proto_item *new_ie_flags_ti;
|
|
proto_tree *new_ie_flags_tree;
|
|
guint ies_found = 0;
|
|
|
|
/* Add new IE flags subtree */
|
|
new_ie_flags_ti = proto_tree_add_string_format(tree, hf_fp_rach_new_ie_flags, tvb, offset, 1,
|
|
"", "New IE flags");
|
|
new_ie_flags_tree = proto_item_add_subtree(new_ie_flags_ti, ett_fp_rach_new_ie_flags);
|
|
|
|
/* Read next byte */
|
|
flags = tvb_get_guint8(tvb, offset);
|
|
/* flag_bytes++ */
|
|
|
|
/* Dissect individual bits */
|
|
for (n=0; n < 8; n++) {
|
|
switch (n) {
|
|
case 6:
|
|
switch (p_fp_info->division) {
|
|
case Division_FDD:
|
|
/* Ext propagation delay */
|
|
ext_propagation_delay_present = TRUE;
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_rach_ext_propagation_delay_present,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case Division_TDD_128:
|
|
/* Ext Rx Sync UL Timing */
|
|
ext_rx_sync_ul_timing_deviation_present = TRUE;
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_rach_ext_rx_sync_ul_timing_deviation_present,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
break;
|
|
default:
|
|
/* Not defined */
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_rach_new_ie_flag_unused[6],
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
}
|
|
break;
|
|
case 7:
|
|
switch (p_fp_info->division) {
|
|
case Division_FDD:
|
|
/* Cell Portion ID */
|
|
cell_portion_id_present = TRUE;
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_rach_cell_portion_id_present,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case Division_TDD_128:
|
|
/* AOA */
|
|
angle_of_arrival_present = TRUE;
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_rach_angle_of_arrival_present,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
case Division_TDD_384:
|
|
case Division_TDD_768:
|
|
/* Extended Rx Timing Deviation */
|
|
ext_rx_timing_deviation_present = TRUE;
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_rach_ext_rx_timing_deviation_present,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* No defined meanings */
|
|
/* Visual Studio Code Analyzer wrongly thinks n can be 7 here. It can't */
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_rach_new_ie_flag_unused[n],
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
}
|
|
if ((flags >> (7-n)) & 0x01) {
|
|
ies_found++;
|
|
}
|
|
}
|
|
offset++;
|
|
|
|
proto_item_append_text(new_ie_flags_ti, " (%u IEs found)", ies_found);
|
|
|
|
/* Last bit set will indicate another flags byte follows... */
|
|
} while (0); /*((flags & 0x01) && (flag_bytes < 31));*/
|
|
|
|
/* Cell Portion ID */
|
|
if (cell_portion_id_present) {
|
|
proto_tree_add_item(tree, hf_fp_cell_portion_id, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
|
|
/* Ext Rx Timing Deviation */
|
|
if (ext_rx_timing_deviation_present) {
|
|
guint8 extra_bits;
|
|
guint bits_to_extend;
|
|
switch (p_fp_info->division) {
|
|
case Division_TDD_384:
|
|
bits_to_extend = 1;
|
|
break;
|
|
case Division_TDD_768:
|
|
bits_to_extend = 2;
|
|
break;
|
|
|
|
default:
|
|
/* TODO: report unexpected division type */
|
|
bits_to_extend = 1;
|
|
break;
|
|
}
|
|
extra_bits = tvb_get_guint8(tvb, offset) &
|
|
((bits_to_extend == 1) ? 0x01 : 0x03);
|
|
rx_timing_deviation = (extra_bits << 8) | (rx_timing_deviation);
|
|
proto_item_append_text(rx_timing_deviation_ti,
|
|
" (extended to 0x%x)",
|
|
rx_timing_deviation);
|
|
proto_tree_add_bits_item(tree, hf_fp_extended_bits, tvb,
|
|
offset*8 + (8-bits_to_extend), bits_to_extend, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
|
|
/* Ext propagation delay. */
|
|
if (ext_propagation_delay_present) {
|
|
guint16 extra_bits = tvb_get_ntohs(tvb, offset) & 0x03ff;
|
|
proto_tree_add_item(tree, hf_fp_ext_propagation_delay, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
/* Adding 10 bits to original 8 */
|
|
proto_item_append_text(propagation_delay_ti, " (extended to %u)",
|
|
((extra_bits << 8) | propagation_delay) * 3);
|
|
offset += 2;
|
|
}
|
|
|
|
/* Angle of Arrival (AOA) */
|
|
if (angle_of_arrival_present) {
|
|
proto_tree_add_item(tree, hf_fp_angle_of_arrival, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
|
|
/* Ext. Rx Sync UL Timing Deviation */
|
|
if (ext_rx_sync_ul_timing_deviation_present) {
|
|
guint16 extra_bits;
|
|
|
|
/* Ext received Sync UL Timing Deviation */
|
|
extra_bits = tvb_get_ntohs(tvb, offset) & 0x1fff;
|
|
proto_tree_add_item(tree, hf_fp_ext_received_sync_ul_timing_deviation, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
|
|
/* Adding 13 bits to original 8 */
|
|
proto_item_append_text(received_sync_ul_timing_deviation_ti, " (extended to %u)",
|
|
(extra_bits << 8) | received_sync_ul_timing_deviation);
|
|
offset += 2;
|
|
}
|
|
}
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
|
|
|
|
/**************************/
|
|
/* Dissect a FACH channel */
|
|
static void
|
|
dissect_fach_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info, void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
guint header_length = 0;
|
|
|
|
/* Header CRC */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
}
|
|
else {
|
|
guint8 cfn;
|
|
/* DATA */
|
|
|
|
/* CFN */
|
|
cfn = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "CFN=%03u ", cfn);
|
|
|
|
/* TFI */
|
|
proto_tree_add_item(tree, hf_fp_fach_tfi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Transmit power level */
|
|
proto_tree_add_float(tree, hf_fp_transmit_power_level, tvb, offset, 1,
|
|
(float)(int)(tvb_get_guint8(tvb, offset)) / 10);
|
|
offset++;
|
|
header_length = offset;
|
|
|
|
/* TB data */
|
|
offset = dissect_tb_data(tvb, pinfo, tree, offset, p_fp_info, &mac_fdd_fach_handle, data);
|
|
|
|
/* New IE flags (if it looks as though they are present) */
|
|
if ((p_fp_info->release == 7) &&
|
|
(tvb_reported_length_remaining(tvb, offset) > 2)) {
|
|
|
|
guint8 flags = tvb_get_guint8(tvb, offset);
|
|
guint8 aoa_present = flags & 0x01;
|
|
offset++;
|
|
|
|
if (aoa_present) {
|
|
proto_tree_add_item(tree, hf_fp_angle_of_arrival, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
}
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
|
|
|
|
/**************************/
|
|
/* Dissect a DSCH channel */
|
|
static void
|
|
dissect_dsch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
gboolean is_control_frame;
|
|
|
|
/* Header CRC */
|
|
proto_tree_add_item(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
}
|
|
else {
|
|
guint32 cfn;
|
|
guint header_length = 0;
|
|
|
|
/* DATA */
|
|
|
|
/* CFN */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "CFN=%03u ", cfn);
|
|
|
|
/* TFI */
|
|
proto_tree_add_item(tree, hf_fp_tfi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
|
|
/* Other fields depend upon release & FDD/TDD settings */
|
|
if (((p_fp_info->release == 99) || (p_fp_info->release == 4)) &&
|
|
(p_fp_info->channel == CHANNEL_DSCH_FDD)) {
|
|
|
|
/* Power offset */
|
|
proto_tree_add_float(tree, hf_fp_power_offset, tvb, offset, 1,
|
|
(float)(-32.0) +
|
|
((float)(int)(tvb_get_guint8(tvb, offset)) * (float)(0.25)));
|
|
offset++;
|
|
|
|
/* Code number */
|
|
proto_tree_add_item(tree, hf_fp_code_number, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Spreading Factor (3 bits) */
|
|
proto_tree_add_item(tree, hf_fp_spreading_factor, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* MC info (4 bits)*/
|
|
proto_tree_add_item(tree, hf_fp_mc_info, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* Last bit of this byte is spare */
|
|
offset++;
|
|
}
|
|
else {
|
|
/* Normal case */
|
|
|
|
/* PDSCH Set Id */
|
|
proto_tree_add_item(tree, hf_fp_pdsch_set_id, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Transmit power level */
|
|
proto_tree_add_float(tree, hf_fp_transmit_power_level, tvb, offset, 1,
|
|
(float)(int)(tvb_get_guint8(tvb, offset)) / 10);
|
|
offset++;
|
|
}
|
|
header_length = offset;
|
|
/* TB data */
|
|
offset = dissect_tb_data(tvb, pinfo, tree, offset, p_fp_info, NULL, NULL);
|
|
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
|
|
|
|
/**************************/
|
|
/* Dissect a USCH channel */
|
|
static void
|
|
dissect_usch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
gboolean is_control_frame;
|
|
|
|
/* Header CRC */
|
|
proto_tree_add_item(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
}
|
|
else {
|
|
guint cfn;
|
|
guint16 rx_timing_deviation;
|
|
proto_item *rx_timing_deviation_ti;
|
|
guint header_length = 0;
|
|
|
|
/* DATA */
|
|
|
|
/* CFN */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "CFN=%03u ", cfn);
|
|
|
|
/* TFI */
|
|
proto_tree_add_item(tree, hf_fp_usch_tfi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Rx Timing Deviation */
|
|
rx_timing_deviation = tvb_get_guint8(tvb, offset);
|
|
rx_timing_deviation_ti = proto_tree_add_item(tree, hf_fp_rx_timing_deviation,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
header_length = offset;
|
|
/* TB data */
|
|
offset = dissect_tb_data(tvb, pinfo, tree, offset, p_fp_info, NULL, NULL);
|
|
|
|
/* QE */
|
|
proto_tree_add_item(tree, hf_fp_quality_estimate, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* CRCIs */
|
|
offset = dissect_crci_bits(tvb, pinfo, tree, p_fp_info, offset);
|
|
|
|
/* New IEs */
|
|
if ((p_fp_info->release == 7) &&
|
|
(tvb_reported_length_remaining(tvb, offset) > 2)) {
|
|
|
|
guint8 flags = tvb_get_guint8(tvb, offset);
|
|
guint8 bits_extended = flags & 0x01;
|
|
offset++;
|
|
|
|
if (bits_extended) {
|
|
guint8 extra_bits = tvb_get_guint8(tvb, offset) & 0x03;
|
|
proto_item_append_text(rx_timing_deviation_ti,
|
|
" (extended to %u)",
|
|
(rx_timing_deviation << 2) | extra_bits);
|
|
}
|
|
offset++;
|
|
}
|
|
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**************************/
|
|
/* Dissect a PCH channel */
|
|
static void
|
|
dissect_pch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info, void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint16 pch_cfn;
|
|
guint32 tfi;
|
|
gboolean paging_indication;
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
|
|
/* Header CRC */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
}
|
|
else {
|
|
guint header_length = 0;
|
|
/* DATA */
|
|
|
|
/* 12-bit CFN value */
|
|
proto_tree_add_item(tree, hf_fp_pch_cfn, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
pch_cfn = (tvb_get_ntohs(tvb, offset) & 0xfff0) >> 4;
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "CFN=%04u ", pch_cfn);
|
|
|
|
/* Paging indication */
|
|
proto_tree_add_item(tree, hf_fp_pch_pi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
paging_indication = tvb_get_guint8(tvb, offset) & 0x01;
|
|
offset++;
|
|
|
|
/* 5-bit TFI */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_pch_tfi, tvb, offset, 1, ENC_BIG_ENDIAN, &tfi);
|
|
offset++;
|
|
header_length = offset;
|
|
/* Optional paging indications */
|
|
if (paging_indication) {
|
|
proto_item *ti;
|
|
ti = proto_tree_add_item(tree, hf_fp_paging_indication_bitmap, tvb,
|
|
offset,
|
|
(p_fp_info->paging_indications+7) / 8,
|
|
ENC_NA);
|
|
proto_item_append_text(ti, " (%u bits)", p_fp_info->paging_indications);
|
|
|
|
if(preferences_track_paging_indications && !PINFO_FD_VISITED(pinfo)){
|
|
paging_indications_info_t* current_pi_info;
|
|
current_pi_info = wmem_new0(wmem_file_scope(), paging_indications_info_t);
|
|
current_pi_info->frame_number = pinfo->num;
|
|
current_pi_info->paging_indications_bitmap = (guint8*)tvb_memdup(wmem_file_scope(), tvb, offset, (p_fp_info->paging_indications+7) / 8);
|
|
p_fp_info->current_paging_indications = current_pi_info;
|
|
}
|
|
|
|
offset += ((p_fp_info->paging_indications+7) / 8);
|
|
}
|
|
if(preferences_track_paging_indications) {
|
|
if(p_fp_info->relevant_paging_indications) {
|
|
/*If tracking PI is enabled and PI info (from the last packet) is attached, show on tree*/
|
|
proto_item *ti;
|
|
proto_tree *relevant_pi_tree;
|
|
|
|
tvbuff_t *pi_tvb;
|
|
pi_tvb = tvb_new_child_real_data(tvb,
|
|
p_fp_info->relevant_paging_indications->paging_indications_bitmap,
|
|
(p_fp_info->paging_indications+7) / 8,
|
|
(p_fp_info->paging_indications+7) / 8);
|
|
add_new_data_source(pinfo, pi_tvb, "Relevant Paging Indication");
|
|
ti = proto_tree_add_item(tree, hf_fp_relevant_paging_indication_bitmap, pi_tvb,
|
|
0,
|
|
(p_fp_info->paging_indications+7) / 8,
|
|
ENC_NA);
|
|
proto_item_append_text(ti, " (%u bits)", p_fp_info->paging_indications);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
relevant_pi_tree = proto_item_add_subtree(ti, ett_fp_pch_relevant_pi);
|
|
ti = proto_tree_add_uint(relevant_pi_tree, hf_fp_relevant_pi_frame,
|
|
tvb, 0, 0, p_fp_info->relevant_paging_indications->frame_number);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
else {
|
|
/* PI info not attached. Check if this frame has any Transport Blocks (i.e. RRC payloads) */
|
|
if(tfi > 0)
|
|
{
|
|
/* This frame has RRC payload(s) but the PI info is missing, report to the user*/
|
|
proto_tree_add_expert(tree, pinfo, &ei_fp_pch_lost_relevant_pi_frame, tvb, offset, -1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* TB data */
|
|
offset = dissect_tb_data(tvb, pinfo, tree, offset, p_fp_info, &mac_fdd_pch_handle, data);
|
|
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
|
|
|
|
/**************************/
|
|
/* Dissect a CPCH channel */
|
|
static void
|
|
dissect_cpch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
gboolean is_control_frame;
|
|
|
|
/* Header CRC */
|
|
proto_tree_add_item(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
}
|
|
else {
|
|
guint cfn;
|
|
guint32 encoded;
|
|
guint header_length = 0;
|
|
guint32 propagation_delay = 0;
|
|
|
|
/* DATA */
|
|
|
|
/* CFN */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "CFN=%03u ", cfn);
|
|
|
|
/* TFI */
|
|
proto_tree_add_item(tree, hf_fp_cpch_tfi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Propagation delay */
|
|
encoded = tvb_get_guint8(tvb, offset);
|
|
propagation_delay = encoded * 3;
|
|
proto_tree_add_uint_format_value(tree, hf_fp_propagation_delay, tvb, offset, 1,
|
|
propagation_delay, "%u chips (%u)",
|
|
propagation_delay, encoded);
|
|
offset++;
|
|
header_length = offset; /* XXX this might be wrong */
|
|
/* TB data */
|
|
offset = dissect_tb_data(tvb, pinfo, tree, offset, p_fp_info, NULL, NULL);
|
|
|
|
/* CRCIs */
|
|
offset = dissect_crci_bits(tvb, pinfo, tree, p_fp_info, offset);
|
|
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
|
|
|
|
/**************************/
|
|
/* Dissect a BCH channel */
|
|
static void
|
|
dissect_bch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
gboolean is_control_frame;
|
|
|
|
/* Header CRC */
|
|
proto_tree_add_item(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
}
|
|
}
|
|
|
|
|
|
/********************************/
|
|
/* Dissect an IUR DSCH channel */
|
|
static void
|
|
dissect_iur_dsch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
gboolean is_control_frame;
|
|
|
|
/* Header CRC */
|
|
proto_tree_add_item(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
}
|
|
else {
|
|
/* TODO: DATA */
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
/************************/
|
|
/* DCH control messages */
|
|
|
|
static int
|
|
dissect_dch_timing_adjustment(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset)
|
|
{
|
|
guint32 cfn;
|
|
gint16 toa;
|
|
proto_item *toa_ti;
|
|
|
|
/* CFN control */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
/* ToA */
|
|
toa = tvb_get_ntohs(tvb, offset);
|
|
toa_ti = proto_tree_add_item(tree, hf_fp_toa, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
expert_add_info_format(pinfo, toa_ti, &ei_fp_timing_adjustmentment_reported, "Timing adjustmentment reported (%f ms)", (float)(toa / 8));
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" CFN = %u, ToA = %d", cfn, toa);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_dch_rx_timing_deviation(packet_info *pinfo, proto_tree *tree,
|
|
tvbuff_t *tvb, int offset,
|
|
struct fp_info *p_fp_info)
|
|
{
|
|
guint16 timing_deviation;
|
|
gint timing_deviation_chips;
|
|
proto_item *timing_deviation_ti;
|
|
|
|
/* CFN control */
|
|
proto_tree_add_item(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Rx Timing Deviation */
|
|
timing_deviation = tvb_get_guint8(tvb, offset);
|
|
timing_deviation_ti = proto_tree_add_item(tree, hf_fp_dch_rx_timing_deviation, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* May be extended in R7, but in this case there are at least 2 bytes remaining */
|
|
if ((p_fp_info->release == 7) &&
|
|
(tvb_reported_length_remaining(tvb, offset) >= 2)) {
|
|
|
|
/* New IE flags */
|
|
guint64 extended_bits_present;
|
|
guint64 e_rucch_present;
|
|
|
|
/* Read flags */
|
|
proto_tree_add_bits_ret_val(tree, hf_fp_e_rucch_present, tvb,
|
|
offset*8 + 6, 1, &e_rucch_present, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bits_ret_val(tree, hf_fp_extended_bits_present, tvb,
|
|
offset*8 + 7, 1, &extended_bits_present, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Optional E-RUCCH */
|
|
if (e_rucch_present) {
|
|
|
|
/* Value of bit_offset depends upon division type */
|
|
int bit_offset;
|
|
|
|
switch (p_fp_info->division) {
|
|
case Division_TDD_384:
|
|
bit_offset = 6;
|
|
break;
|
|
case Division_TDD_768:
|
|
bit_offset = 5;
|
|
break;
|
|
default:
|
|
{
|
|
proto_tree_add_expert(tree, pinfo, &ei_fp_expecting_tdd, tvb, 0, 0);
|
|
bit_offset = 6;
|
|
}
|
|
}
|
|
|
|
proto_tree_add_item(tree, hf_fp_dch_e_rucch_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_bits_item(tree, hf_fp_dch_e_rucch_flag, tvb,
|
|
offset*8 + bit_offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/* Timing deviation may be extended by another:
|
|
- 1 bits (3.84 TDD) OR
|
|
- 2 bits (7.68 TDD)
|
|
*/
|
|
if (extended_bits_present) {
|
|
guint8 extra_bits;
|
|
guint bits_to_extend;
|
|
switch (p_fp_info->division) {
|
|
case Division_TDD_384:
|
|
bits_to_extend = 1;
|
|
break;
|
|
case Division_TDD_768:
|
|
bits_to_extend = 2;
|
|
break;
|
|
|
|
default:
|
|
/* TODO: report unexpected division type */
|
|
bits_to_extend = 1;
|
|
break;
|
|
}
|
|
extra_bits = tvb_get_guint8(tvb, offset) &
|
|
((bits_to_extend == 1) ? 0x01 : 0x03);
|
|
timing_deviation = (extra_bits << 8) | (timing_deviation);
|
|
proto_item_append_text(timing_deviation_ti,
|
|
" (extended to 0x%x)",
|
|
timing_deviation);
|
|
proto_tree_add_bits_item(tree, hf_fp_extended_bits, tvb,
|
|
offset*8 + (8-bits_to_extend), bits_to_extend, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
}
|
|
|
|
timing_deviation_chips = (timing_deviation*4) - 1024;
|
|
proto_item_append_text(timing_deviation_ti, " (%d chips)",
|
|
timing_deviation_chips);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " deviation = %u (%d chips)",
|
|
timing_deviation, timing_deviation_chips);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_dch_dl_synchronisation(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset)
|
|
{
|
|
guint32 cfn;
|
|
|
|
/* CFN control */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CFN = %u", cfn);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_dch_ul_synchronisation(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset)
|
|
{
|
|
guint32 cfn;
|
|
gint16 toa;
|
|
|
|
/* CFN control */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
/* ToA */
|
|
toa = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_toa, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CFN = %u, ToA = %d",
|
|
cfn, toa);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_dch_outer_loop_power_control(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset)
|
|
{
|
|
/* UL SIR target */
|
|
guint8 encoded = tvb_get_guint8(tvb, offset);
|
|
float target = (float)-8.2 + ((float)0.1 * (float)(int)(encoded));
|
|
proto_tree_add_float_format_value(tree, hf_fp_ul_sir_target, tvb, offset, 1, target, "%.1f dB (%u)", target, encoded);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " UL SIR Target = %.1f", target);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_dch_dl_node_synchronisation(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset)
|
|
{
|
|
return dissect_common_dl_node_synchronisation(pinfo, tree, tvb, offset);
|
|
}
|
|
|
|
static int
|
|
dissect_dch_ul_node_synchronisation(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset)
|
|
{
|
|
return dissect_common_ul_node_synchronisation(pinfo, tree, tvb, offset);
|
|
}
|
|
|
|
static int
|
|
dissect_dch_radio_interface_parameter_update(proto_tree *tree, packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
|
|
{
|
|
float tpc_po;
|
|
gint8 max_tx_pwr;
|
|
int n;
|
|
guint8 encoded;
|
|
|
|
/* Show defined flags in these 2 bytes */
|
|
for (n=4; n >= 0; n--) {
|
|
proto_tree_add_item(tree, hf_fp_radio_interface_parameter_update_flag[n], tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
offset += 2;
|
|
|
|
/* CFN */
|
|
proto_tree_add_item(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* DPC mode */
|
|
proto_tree_add_item(tree, hf_fp_dpc_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* TPC PO */
|
|
encoded = tvb_get_guint8(tvb, offset) & 0x1f;
|
|
tpc_po = (float)encoded * 0.25f;
|
|
proto_tree_add_float_format_value(tree, hf_fp_tpc_po, tvb, offset, 1, tpc_po,
|
|
"%.2f dB (%u)", tpc_po, encoded);
|
|
offset++;
|
|
|
|
/* Multiple RL sets indicator */
|
|
proto_tree_add_item(tree, hf_fp_multiple_rl_set_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* Maximum UE TX Power */
|
|
encoded = tvb_get_guint8(tvb, offset) & 0x7f;
|
|
max_tx_pwr = -55 + encoded;
|
|
proto_tree_add_int_format(tree, hf_fp_max_ue_tx_pow, tvb, offset, 1, max_tx_pwr,
|
|
"%d dBm (%u)", max_tx_pwr, encoded);
|
|
offset++;
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_dch_timing_advance(proto_tree *tree, packet_info *pinfo,
|
|
tvbuff_t *tvb, int offset, struct fp_info *p_fp_info)
|
|
{
|
|
guint32 cfn;
|
|
guint16 timing_advance;
|
|
proto_item *timing_advance_ti;
|
|
|
|
/* CFN control */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn_control, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
/* Timing Advance */
|
|
timing_advance = (tvb_get_guint8(tvb, offset) & 0x3f) * 4;
|
|
timing_advance_ti = proto_tree_add_uint(tree, hf_fp_timing_advance, tvb, offset, 1, timing_advance);
|
|
offset++;
|
|
|
|
if ((p_fp_info->release == 7) &&
|
|
(tvb_reported_length_remaining(tvb, offset) > 0)) {
|
|
|
|
/* New IE flags */
|
|
guint8 flags = tvb_get_guint8(tvb, offset);
|
|
guint8 extended_bits = flags & 0x01;
|
|
offset++;
|
|
|
|
if (extended_bits) {
|
|
guint8 extra_bit = tvb_get_guint8(tvb, offset) & 0x01;
|
|
proto_item_append_text(timing_advance_ti, " (extended to %u)",
|
|
(timing_advance << 1) | extra_bit);
|
|
}
|
|
offset++;
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CFN = %u, TA = %u",
|
|
cfn, timing_advance);
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_dch_tnl_congestion_indication(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset)
|
|
{
|
|
guint64 status;
|
|
|
|
/* Congestion status */
|
|
proto_tree_add_bits_ret_val(tree, hf_fp_congestion_status, tvb,
|
|
offset*8 + 6, 2, &status, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " status = %s",
|
|
val_to_str_const((guint16)status, congestion_status_vals, "unknown"));
|
|
|
|
return offset;
|
|
}
|
|
|
|
|
|
|
|
|
|
/* DCH control frame */
|
|
static void
|
|
dissect_dch_control_frame(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb,
|
|
int offset, struct fp_info *p_fp_info)
|
|
{
|
|
/* Control frame type */
|
|
guint8 control_frame_type = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_dch_control_frame_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str_const(control_frame_type,
|
|
dch_control_frame_type_vals, "Unknown"));
|
|
|
|
switch (control_frame_type) {
|
|
case DCH_TIMING_ADJUSTMENT:
|
|
/*offset =*/ dissect_dch_timing_adjustment(tree, pinfo, tvb, offset);
|
|
break;
|
|
case DCH_RX_TIMING_DEVIATION:
|
|
/*offset =*/ dissect_dch_rx_timing_deviation(pinfo, tree, tvb, offset, p_fp_info);
|
|
break;
|
|
case DCH_DL_SYNCHRONISATION:
|
|
/*offset =*/ dissect_dch_dl_synchronisation(tree, pinfo, tvb, offset);
|
|
break;
|
|
case DCH_UL_SYNCHRONISATION:
|
|
/*offset =*/ dissect_dch_ul_synchronisation(tree, pinfo, tvb, offset);
|
|
break;
|
|
case DCH_OUTER_LOOP_POWER_CONTROL:
|
|
/*offset =*/ dissect_dch_outer_loop_power_control(tree, pinfo, tvb, offset);
|
|
break;
|
|
case DCH_DL_NODE_SYNCHRONISATION:
|
|
/*offset =*/ dissect_dch_dl_node_synchronisation(tree, pinfo, tvb, offset);
|
|
break;
|
|
case DCH_UL_NODE_SYNCHRONISATION:
|
|
/*offset =*/ dissect_dch_ul_node_synchronisation(tree, pinfo, tvb, offset);
|
|
break;
|
|
case DCH_RADIO_INTERFACE_PARAMETER_UPDATE:
|
|
/*offset =*/ dissect_dch_radio_interface_parameter_update(tree, pinfo, tvb, offset);
|
|
break;
|
|
case DCH_TIMING_ADVANCE:
|
|
/*offset =*/ dissect_dch_timing_advance(tree, pinfo, tvb, offset, p_fp_info);
|
|
break;
|
|
case DCH_TNL_CONGESTION_INDICATION:
|
|
/*offset =*/ dissect_dch_tnl_congestion_indication(tree, pinfo, tvb, offset);
|
|
break;
|
|
}
|
|
|
|
/* Spare Extension */
|
|
/* dissect_spare_extension_and_crc(tvb, pinfo, tree, 0, offset);
|
|
*/
|
|
}
|
|
|
|
/*******************************/
|
|
/* Dissect a DCH channel */
|
|
static void
|
|
dissect_dch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info, void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint32 cfn;
|
|
guint header_length = 0;
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
|
|
/* Header CRC */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO,
|
|
is_control_frame ? " [Control] " :
|
|
((p_fp_info->is_uplink) ? " [ULData] " :
|
|
" [DLData] " ));
|
|
|
|
if (is_control_frame) {
|
|
/* DCH control frame */
|
|
dissect_dch_control_frame(tree, pinfo, tvb, offset, p_fp_info);
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
} else {
|
|
/************************/
|
|
/* DCH data here */
|
|
int chan;
|
|
/* CFN */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "CFN=%03u ", cfn);
|
|
|
|
/* One TFI for each channel */
|
|
for (chan=0; chan < p_fp_info->num_chans; chan++) {
|
|
proto_tree_add_item(tree, hf_fp_tfi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
header_length = offset;
|
|
/* Dissect TB data */
|
|
offset = dissect_tb_data(tvb, pinfo, tree, offset, p_fp_info, &mac_fdd_dch_handle, data);
|
|
|
|
/* QE (uplink only) */
|
|
if (p_fp_info->is_uplink) {
|
|
proto_tree_add_item(tree, hf_fp_quality_estimate, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
|
|
/* CRCI bits (uplink only) */
|
|
if (p_fp_info->is_uplink) {
|
|
offset = dissect_crci_bits(tvb, pinfo, tree, p_fp_info, offset);
|
|
}
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare extension and payload CRC (optional) */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree,
|
|
p_fp_info->dch_crc_present, offset, header_length);
|
|
}
|
|
}
|
|
|
|
/**********************************/
|
|
/* Dissect an E-DCH channel */
|
|
static void
|
|
dissect_e_dch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
gboolean is_common,
|
|
void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint8 number_of_subframes;
|
|
guint32 cfn;
|
|
int n;
|
|
struct edch_t1_subframe_info subframes[16];
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
guint header_length = 0;
|
|
rlc_info * rlcinf;
|
|
|
|
if (p_fp_info->edch_type == 1) {
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (T2)");
|
|
}
|
|
|
|
/* Header CRC */
|
|
/* the bitmask doesn't properly handle this delicate case, do manually */
|
|
header_crc = (tvb_get_bits8(tvb, offset*8, 7) << 4) + tvb_get_bits8(tvb, offset*8+8, 4);
|
|
|
|
/* Frame Type */
|
|
is_control_frame = tvb_get_guint8(tvb, offset) & 0x01;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
/* DCH control frame */
|
|
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
proto_tree_add_item(tree, hf_fp_ft, tvb, 0, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
dissect_dch_control_frame(tree, pinfo, tvb, offset, p_fp_info);
|
|
}
|
|
else {
|
|
/********************************/
|
|
/* E-DCH data here */
|
|
guint bit_offset = 0;
|
|
guint total_pdus = 0;
|
|
guint total_bits = 0;
|
|
gboolean dissected = FALSE;
|
|
|
|
rlcinf = (rlc_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0);
|
|
if (!rlcinf) {
|
|
rlcinf = wmem_new0(wmem_packet_scope(), rlc_info);
|
|
}
|
|
|
|
header_crc_pi = proto_tree_add_uint_format(tree, hf_fp_edch_header_crc, tvb,
|
|
offset, 2, header_crc,
|
|
"%u%u%u%u %u%u%u. %u%u%u%u .... = E-DCH Header CRC: 0x%x",
|
|
(header_crc >> 10) & 1,
|
|
(header_crc >> 9) & 1,
|
|
(header_crc >> 8) & 1,
|
|
(header_crc >> 7) & 1,
|
|
(header_crc >> 6) & 1,
|
|
(header_crc >> 5) & 1,
|
|
(header_crc >> 4) & 1,
|
|
(header_crc >> 3) & 1,
|
|
(header_crc >> 2) & 1,
|
|
(header_crc >> 1) & 1,
|
|
(header_crc >> 0) & 1, header_crc);
|
|
proto_tree_add_item(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
/* FSN */
|
|
proto_tree_add_item(tree, hf_fp_edch_fsn, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Number of subframes.
|
|
This was 3 bits in early releases, is 4 bits offset by 1 in later releases */
|
|
if ((p_fp_info->release >= 6) &&
|
|
((p_fp_info->release_year > 2005) ||
|
|
((p_fp_info->release_year == 2005) && (p_fp_info->release_month >= 9)))) {
|
|
|
|
/* Use 4 bits plus offset of 1 */
|
|
number_of_subframes = (tvb_get_guint8(tvb, offset) & 0x0f) + 1;
|
|
}
|
|
else {
|
|
/* Use 3 bits only */
|
|
number_of_subframes = (tvb_get_guint8(tvb, offset) & 0x07);
|
|
}
|
|
proto_tree_add_uint(tree, hf_fp_edch_number_of_subframes, tvb, offset, 1,
|
|
number_of_subframes);
|
|
|
|
offset++;
|
|
|
|
/* CFN */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_cfn, tvb, offset, 1, ENC_BIG_ENDIAN, &cfn);
|
|
offset++;
|
|
|
|
/* Remainder of T2 or common data frames differ here... */
|
|
if (p_fp_info->edch_type == 1) {
|
|
dissect_e_dch_t2_or_common_channel_info(tvb, pinfo, tree, offset, p_fp_info,
|
|
number_of_subframes,
|
|
is_common, header_crc,
|
|
header_crc_pi, data);
|
|
return;
|
|
}
|
|
|
|
/* EDCH subframe header list */
|
|
for (n=0; n < number_of_subframes; n++) {
|
|
int i;
|
|
int start_offset = offset;
|
|
proto_item *subframe_header_ti;
|
|
proto_tree *subframe_header_tree;
|
|
|
|
/* Add subframe header subtree */
|
|
subframe_header_ti = proto_tree_add_string_format(tree, hf_fp_edch_subframe_header, tvb, offset, 0,
|
|
"", "Subframe");
|
|
subframe_header_tree = proto_item_add_subtree(subframe_header_ti, ett_fp_edch_subframe_header);
|
|
|
|
/* Number of HARQ Retransmissions */
|
|
proto_tree_add_item(subframe_header_tree, hf_fp_edch_harq_retransmissions, tvb,
|
|
offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* Subframe number */
|
|
subframes[n].subframe_number = (tvb_get_guint8(tvb, offset) & 0x07);
|
|
proto_tree_add_bits_item(subframe_header_tree, hf_fp_edch_subframe_number, tvb,
|
|
offset*8+5, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Number of MAC-es PDUs */
|
|
subframes[n].number_of_mac_es_pdus = (tvb_get_guint8(tvb, offset) & 0xf0) >> 4;
|
|
proto_tree_add_item(subframe_header_tree, hf_fp_edch_number_of_mac_es_pdus,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
bit_offset = 4;
|
|
|
|
proto_item_append_text(subframe_header_ti, " %u header (%u MAC-es PDUs)",
|
|
subframes[n].subframe_number,
|
|
subframes[n].number_of_mac_es_pdus);
|
|
|
|
/* Details of each MAC-es PDU */
|
|
for (i=0; i < subframes[n].number_of_mac_es_pdus; i++) {
|
|
guint64 ddi;
|
|
guint64 n_pdus; /*Size of the PDU*/
|
|
|
|
proto_item *ddi_ti;
|
|
gint ddi_size = -1;
|
|
int p;
|
|
|
|
/* DDI (6 bits) */
|
|
ddi_ti = proto_tree_add_bits_ret_val(subframe_header_tree, hf_fp_edch_ddi, tvb,
|
|
offset*8 + bit_offset, 6, &ddi, ENC_BIG_ENDIAN);
|
|
|
|
rlcinf->rbid[i] = (guint8)ddi;
|
|
/********************************/
|
|
/* Look up data in higher layers*/
|
|
/* Look up the size from this DDI value */
|
|
for (p=0; p < p_fp_info->no_ddi_entries; p++) {
|
|
if (ddi == p_fp_info->edch_ddi[p]) {
|
|
ddi_size = p_fp_info->edch_macd_pdu_size[p];
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (ddi_size == -1) {
|
|
expert_add_info_format(pinfo, ddi_ti, &ei_fp_ddi_not_defined, "DDI %u not defined for this UE!", (guint)ddi);
|
|
return;
|
|
}
|
|
else {
|
|
proto_item_append_text(ddi_ti, " (%d bits)", ddi_size);
|
|
}
|
|
|
|
subframes[n].ddi[i] = (guint8)ddi;
|
|
bit_offset += 6;
|
|
|
|
/* Number of MAC-d PDUs (6 bits) */
|
|
proto_tree_add_bits_ret_val(subframe_header_tree, hf_fp_edch_number_of_mac_d_pdus, tvb,
|
|
offset*8 + bit_offset, 6, &n_pdus, ENC_BIG_ENDIAN);
|
|
|
|
subframes[n].number_of_mac_d_pdus[i] = (guint8)n_pdus;
|
|
bit_offset += 6;
|
|
}
|
|
|
|
offset += ((bit_offset+7)/8);
|
|
|
|
/* Tree should cover entire subframe header */
|
|
proto_item_set_len(subframe_header_ti, offset - start_offset);
|
|
}
|
|
header_length = offset;
|
|
/* EDCH subframes */
|
|
for (n=0; n < number_of_subframes; n++) {
|
|
int i;
|
|
proto_item *subframe_ti;
|
|
proto_tree *subframe_tree;
|
|
guint bits_in_subframe = 0;
|
|
guint mac_d_pdus_in_subframe = 0;
|
|
guint lchid=0; /*Logcial channel id*/
|
|
guint32 user_identity;
|
|
umts_mac_info *macinf;
|
|
bit_offset = 0;
|
|
|
|
macinf = (umts_mac_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0);
|
|
if (!macinf) {
|
|
macinf = wmem_new0(wmem_packet_scope(), umts_mac_info);
|
|
}
|
|
/* Add subframe subtree */
|
|
subframe_ti = proto_tree_add_string_format(tree, hf_fp_edch_subframe, tvb, offset, 0,
|
|
"", "Subframe %u data", subframes[n].subframe_number);
|
|
subframe_tree = proto_item_add_subtree(subframe_ti, ett_fp_edch_subframe);
|
|
|
|
for (i=0; i < subframes[n].number_of_mac_es_pdus; i++) {
|
|
int m;
|
|
guint16 size = 0;
|
|
/* guint8 tsn; */
|
|
guint send_size;
|
|
proto_item *ti;
|
|
int macd_idx;
|
|
proto_tree *maces_tree = NULL;
|
|
|
|
/** TODO: Merge these two loops? **/
|
|
/* Look up mac-d pdu size for this ddi */
|
|
for (m=0; m < p_fp_info->no_ddi_entries; m++) {
|
|
if (subframes[n].ddi[i] == p_fp_info->edch_ddi[m]) {
|
|
size = p_fp_info->edch_macd_pdu_size[m];
|
|
break;
|
|
}
|
|
}
|
|
/* Look up logicalchannel id for this DDI value */
|
|
for (m=0; m < p_fp_info->no_ddi_entries; m++) {
|
|
if (subframes[n].ddi[i] == p_fp_info->edch_ddi[m]) {
|
|
lchid = p_fp_info->edch_lchId[m];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (m == p_fp_info->no_ddi_entries) {
|
|
/* Not found. Oops */
|
|
expert_add_info(pinfo, NULL, &ei_fp_unable_to_locate_ddi_entry);
|
|
return;
|
|
}
|
|
|
|
/* Send MAC-dd PDUs together as one MAC-es PDU */
|
|
send_size = size * subframes[n].number_of_mac_d_pdus[i];
|
|
|
|
/* 2 bits spare */
|
|
proto_tree_add_item(subframe_tree, hf_fp_edch_pdu_padding, tvb,
|
|
offset + (bit_offset/8),
|
|
1, ENC_BIG_ENDIAN);
|
|
bit_offset += 2;
|
|
|
|
/* TSN */
|
|
/* tsn = (tvb_get_guint8(tvb, offset + (bit_offset/8)) & 0x3f); */
|
|
proto_tree_add_item(subframe_tree, hf_fp_edch_tsn, tvb,
|
|
offset + (bit_offset/8),
|
|
1, ENC_BIG_ENDIAN);
|
|
bit_offset += 6;
|
|
|
|
/* PDU */
|
|
if (subframe_tree) {
|
|
ti = proto_tree_add_item(subframe_tree, hf_fp_edch_mac_es_pdu, tvb,
|
|
offset + (bit_offset/8),
|
|
((bit_offset % 8) + send_size + 7) / 8,
|
|
ENC_NA);
|
|
proto_item_append_text(ti, " (%u * %u = %u bits, PDU %d)",
|
|
size, subframes[n].number_of_mac_d_pdus[i],
|
|
send_size, n);
|
|
maces_tree = proto_item_add_subtree(ti, ett_fp_edch_maces);
|
|
}
|
|
/* Determine the UE ID to use in RLC */
|
|
user_identity = p_fp_info->com_context_id;
|
|
if(p_fp_info->urnti) {
|
|
user_identity = p_fp_info->urnti;
|
|
}
|
|
for (macd_idx = 0; macd_idx < subframes[n].number_of_mac_d_pdus[i]; macd_idx++) {
|
|
|
|
if (preferences_call_mac_dissectors) {
|
|
tvbuff_t *next_tvb;
|
|
pinfo->fd->subnum = macd_idx; /* set subframe number to current TB */
|
|
/* create new TVB and pass further on */
|
|
next_tvb = tvb_new_subset_length(tvb, offset + bit_offset/8,
|
|
((bit_offset % 8) + size + 7) / 8);
|
|
|
|
|
|
/*This was all previously stored in [0] rather than [macd_idx] and cur_tb wasn't updated!*/
|
|
/*Set up information needed for MAC and lower layers*/
|
|
macinf->content[macd_idx] = lchId_type_table[lchid]; /*Set the proper Content type for the mac layer.*/
|
|
macinf->lchid[macd_idx] = lchid;
|
|
rlcinf->mode[macd_idx] = lchId_rlc_map[lchid]; /* Set RLC mode by lchid to RLC_MODE map in nbap.h */
|
|
|
|
/* Set U-RNTI to ComuncationContext signaled from nbap*/
|
|
rlcinf->ueid[macd_idx] = user_identity;
|
|
rlcinf->rbid[macd_idx] = lchid; /*subframes[n].ddi[i];*/ /*Save the DDI value for RLC*/
|
|
/*g_warning("========Setting RBID:%d for lchid:%d", subframes[n].ddi[i], lchid);*/
|
|
/* rlcinf->mode[0] = RLC_AM;*/
|
|
rlcinf->li_size[macd_idx] = RLC_LI_7BITS;
|
|
|
|
rlcinf->ciphered[macd_idx] = FALSE;
|
|
rlcinf->deciphered[macd_idx] = FALSE;
|
|
p_fp_info->cur_tb = macd_idx; /*Set the transport block index (NOTE: This and not subnum is used in MAC dissector!)*/
|
|
|
|
/* TODO: use maces_tree? */
|
|
call_dissector_with_data(mac_fdd_edch_handle, next_tvb, pinfo, top_level_tree, data);
|
|
dissected = TRUE;
|
|
}
|
|
else {
|
|
/* Just add as a MAC-d PDU */
|
|
proto_tree_add_item(maces_tree, hf_fp_mac_d_pdu, tvb,
|
|
offset + (bit_offset/8),
|
|
((bit_offset % 8) + size + 7) / 8,
|
|
ENC_NA);
|
|
}
|
|
bit_offset += size;
|
|
}
|
|
|
|
bits_in_subframe += send_size;
|
|
mac_d_pdus_in_subframe += subframes[n].number_of_mac_d_pdus[i];
|
|
|
|
/* Pad out to next byte */
|
|
if (bit_offset % 8) {
|
|
bit_offset += (8 - (bit_offset % 8));
|
|
}
|
|
}
|
|
|
|
if (tree) {
|
|
/* Tree should cover entire subframe */
|
|
proto_item_set_len(subframe_ti, bit_offset/8);
|
|
/* Append summary info to subframe label */
|
|
proto_item_append_text(subframe_ti, " (%u bits in %u MAC-d PDUs)",
|
|
bits_in_subframe, mac_d_pdus_in_subframe);
|
|
}
|
|
total_pdus += mac_d_pdus_in_subframe;
|
|
total_bits += bits_in_subframe;
|
|
|
|
offset += (bit_offset/8);
|
|
}
|
|
|
|
/* Report number of subframes in info column
|
|
* do this only if no other dissector was called */
|
|
if (dissected == FALSE) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" CFN = %03u (%u bits in %u pdus in %u subframes)",
|
|
cfn, total_bits, total_pdus, number_of_subframes);
|
|
}
|
|
/* Add data summary to info column */
|
|
/*col_append_fstr(pinfo->cinfo, COL_INFO, " (%u bytes in %u SDUs in %u MAC-is PDUs in %u subframes)",
|
|
total_bytes, macis_sdus_found, macis_pdus, number_of_subframes);*/
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc_edch(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare extension and payload CRC (optional) */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree,
|
|
p_fp_info->dch_crc_present, offset, header_length);
|
|
}
|
|
}
|
|
|
|
/* Dissect the remainder of the T2 or common frame that differs from T1 */
|
|
static void
|
|
dissect_e_dch_t2_or_common_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
int number_of_subframes,
|
|
gboolean is_common,
|
|
guint16 header_crc,
|
|
proto_item * header_crc_pi,
|
|
void *data)
|
|
{
|
|
int n;
|
|
int pdu_no;
|
|
guint64 total_macis_sdus;
|
|
guint16 macis_sdus_found = 0;
|
|
guint16 macis_pdus = 0;
|
|
gboolean F = TRUE; /* We want to continue loop if get E-RNTI indication... */
|
|
gint bit_offset;
|
|
proto_item *subframe_macis_descriptors_ti = NULL;
|
|
static struct edch_t2_subframe_info subframes[16];
|
|
guint header_length = 0;
|
|
/* User Buffer size */
|
|
proto_tree_add_bits_item(tree, hf_fp_edch_user_buffer_size, tvb, offset*8,
|
|
18, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* Spare is in-between... */
|
|
|
|
/* Total number of MAC-is SDUs */
|
|
proto_tree_add_bits_ret_val(tree, hf_fp_edch_no_macid_sdus, tvb, offset*8+4,
|
|
12, &total_macis_sdus, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
if (is_common) {
|
|
/* E-RNTI */
|
|
proto_tree_add_item(tree, hf_fp_edch_e_rnti, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
|
|
bit_offset = offset*8;
|
|
/* EDCH subframe header list */
|
|
for (n=0; n < number_of_subframes; n++) {
|
|
guint64 subframe_number;
|
|
guint64 no_of_macis_pdus;
|
|
proto_item *subframe_header_ti;
|
|
proto_tree *subframe_header_tree;
|
|
|
|
/* Add subframe header subtree */
|
|
subframe_header_ti = proto_tree_add_string_format(tree, hf_fp_edch_subframe_header, tvb, offset, 0,
|
|
"", "Subframe");
|
|
subframe_header_tree = proto_item_add_subtree(subframe_header_ti, ett_fp_edch_subframe_header);
|
|
|
|
/* Spare bit */
|
|
bit_offset++;
|
|
|
|
if (!is_common) {
|
|
/* Number of HARQ Retransmissions */
|
|
proto_tree_add_item(subframe_header_tree, hf_fp_edch_harq_retransmissions, tvb,
|
|
bit_offset/8, 1, ENC_BIG_ENDIAN);
|
|
bit_offset += 4;
|
|
}
|
|
|
|
/* Subframe number */
|
|
proto_tree_add_bits_ret_val(subframe_header_tree, hf_fp_edch_subframe_number, tvb,
|
|
bit_offset, 3, &subframe_number, ENC_BIG_ENDIAN);
|
|
subframes[n].subframe_number = (guint8)subframe_number;
|
|
bit_offset += 3;
|
|
|
|
/* Number of MAC-is PDUs */
|
|
proto_tree_add_bits_ret_val(subframe_header_tree, hf_fp_edch_number_of_mac_is_pdus, tvb,
|
|
bit_offset, 4, &no_of_macis_pdus, ENC_BIG_ENDIAN);
|
|
bit_offset += 4;
|
|
subframes[n].number_of_mac_is_pdus = (guint8)no_of_macis_pdus;
|
|
macis_pdus += subframes[n].number_of_mac_is_pdus;
|
|
|
|
/* Next 4 bits are spare for T2*/
|
|
if (!is_common) {
|
|
bit_offset += 4;
|
|
}
|
|
|
|
/* Show summary in root */
|
|
proto_item_append_text(subframe_header_ti, " (SFN %u, %u MAC-is PDUs)",
|
|
subframes[n].subframe_number, subframes[n].number_of_mac_is_pdus);
|
|
proto_item_set_len(subframe_header_ti, is_common ? 1 : 2);
|
|
}
|
|
offset = bit_offset / 8;
|
|
|
|
|
|
/* MAC-is PDU descriptors for each subframe follow */
|
|
for (n=0; n < number_of_subframes; n++) {
|
|
proto_tree *subframe_macis_descriptors_tree;
|
|
|
|
/* Add subframe header subtree */
|
|
subframe_macis_descriptors_ti = proto_tree_add_string_format(tree, hf_fp_edch_macis_descriptors, tvb, offset, 0,
|
|
"", "MAC-is descriptors (SFN %u)", subframes[n].subframe_number);
|
|
proto_item_set_len(subframe_macis_descriptors_ti, subframes[n].number_of_mac_is_pdus*2);
|
|
subframe_macis_descriptors_tree = proto_item_add_subtree(subframe_macis_descriptors_ti,
|
|
ett_fp_edch_macis_descriptors);
|
|
|
|
/* Find a sequence of descriptors for each MAC-is PDU in this subframe */
|
|
for (pdu_no=0; pdu_no < subframes[n].number_of_mac_is_pdus; pdu_no++) {
|
|
proto_item *f_ti = NULL;
|
|
|
|
subframes[n].number_of_mac_is_sdus[pdu_no] = 0;
|
|
|
|
do {
|
|
/* Check we haven't gone past the limit */
|
|
if (macis_sdus_found++ > total_macis_sdus) {
|
|
expert_add_info_format(pinfo, f_ti, &ei_fp_mac_is_sdus_miscount, "Found too many (%u) MAC-is SDUs - header said there were %u", macis_sdus_found, (guint16)total_macis_sdus);
|
|
}
|
|
|
|
/* LCH-ID */
|
|
subframes[n].mac_is_lchid[pdu_no][subframes[n].number_of_mac_is_sdus[pdu_no]] = (tvb_get_guint8(tvb, offset) & 0xf0) >> 4;
|
|
proto_tree_add_item(subframe_macis_descriptors_tree, hf_fp_edch_macis_lchid, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
if (subframes[n].mac_is_lchid[pdu_no][subframes[n].number_of_mac_is_sdus[pdu_no]] == 15) {
|
|
proto_item *ti;
|
|
|
|
/* 4 bits of spare */
|
|
offset++;
|
|
|
|
/* E-RNTI */
|
|
ti = proto_tree_add_item(tree, hf_fp_edch_e_rnti, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* This is only allowed if:
|
|
- it's the common case AND
|
|
- it's the first descriptor */
|
|
if (!is_common) {
|
|
expert_add_info(pinfo, ti, &ei_fp_e_rnti_t2_edch_frames);
|
|
}
|
|
if (subframes[n].number_of_mac_is_sdus[pdu_no] > 0) {
|
|
expert_add_info(pinfo, ti, &ei_fp_e_rnti_first_entry);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Length */
|
|
subframes[n].mac_is_length[pdu_no][subframes[n].number_of_mac_is_sdus[pdu_no]] = (tvb_get_ntohs(tvb, offset) & 0x0ffe) >> 1;
|
|
proto_tree_add_item(subframe_macis_descriptors_tree, hf_fp_edch_macis_length, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Flag */
|
|
F = tvb_get_guint8(tvb, offset) & 0x01;
|
|
f_ti = proto_tree_add_item(subframe_macis_descriptors_tree, hf_fp_edch_macis_flag, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
subframes[n].number_of_mac_is_sdus[pdu_no]++;
|
|
|
|
offset++;
|
|
} while (F == 0);
|
|
}
|
|
}
|
|
|
|
/* Check overall count of MAC-is SDUs */
|
|
if (macis_sdus_found != total_macis_sdus) {
|
|
expert_add_info_format(pinfo, subframe_macis_descriptors_ti, &ei_fp_mac_is_sdus_miscount, "Frame contains %u MAC-is SDUs - header said there would be %u!", macis_sdus_found, (guint16)total_macis_sdus);
|
|
}
|
|
header_length = offset;
|
|
/* Now PDUs */
|
|
for (n=0; n < number_of_subframes; n++) {
|
|
|
|
/* MAC-is PDU */
|
|
for (pdu_no=0; pdu_no < subframes[n].number_of_mac_is_pdus; pdu_no++) {
|
|
int i;
|
|
guint length = 0;
|
|
umts_mac_is_info * mac_is_info = wmem_new(wmem_file_scope(), umts_mac_is_info);
|
|
|
|
mac_is_info->number_of_mac_is_sdus = subframes[n].number_of_mac_is_sdus[pdu_no];
|
|
DISSECTOR_ASSERT(subframes[n].number_of_mac_is_sdus[pdu_no] <= MAX_MAC_FRAMES);
|
|
for (i = 0; i < subframes[n].number_of_mac_is_sdus[pdu_no]; i++) {
|
|
mac_is_info->sdulength[i] = subframes[n].mac_is_length[pdu_no][i];
|
|
mac_is_info->lchid[i] = subframes[n].mac_is_lchid[pdu_no][i];
|
|
length += subframes[n].mac_is_length[pdu_no][i];
|
|
}
|
|
|
|
/* Call MAC for this PDU if configured to */
|
|
if (preferences_call_mac_dissectors) {
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0, mac_is_info);
|
|
call_dissector_with_data(mac_fdd_edch_type2_handle, tvb_new_subset_remaining(tvb, offset), pinfo, top_level_tree, data);
|
|
}
|
|
else {
|
|
/* Still show data if not decoding as MAC PDU */
|
|
proto_tree_add_item(tree, hf_fp_edch_mac_is_pdu, tvb, offset, length, ENC_NA);
|
|
}
|
|
|
|
/* get_mac_tsn_size in packet-umts_mac.h, gets the global_mac_tsn_size preference in umts_mac.c */
|
|
if (get_mac_tsn_size() == MAC_TSN_14BITS) {
|
|
offset += length + 2; /* Plus 2 bytes for TSN 14 bits and SS 2 bit. */
|
|
} else {
|
|
offset += length + 1; /* Plus 1 byte for TSN 6 bits and SS 2 bit. */
|
|
}
|
|
}
|
|
}
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc_edch(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare extension and payload CRC (optional) */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree,
|
|
p_fp_info->dch_crc_present, offset, header_length);
|
|
}
|
|
|
|
|
|
|
|
/**********************************************************/
|
|
/* Dissect an HSDSCH channel */
|
|
/* The data format corresponds to the format */
|
|
/* described in R5 and R6, and frame type 1 in Release 7. */
|
|
static void
|
|
dissect_hsdsch_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info, void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint header_length = 0;
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
|
|
/* Header CRC */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
}
|
|
else {
|
|
guint8 number_of_pdus;
|
|
guint16 pdu_length;
|
|
guint16 user_buffer_size;
|
|
int i;
|
|
umts_mac_info *macinf;
|
|
rlc_info *rlcinf;
|
|
guint32 user_identity;
|
|
|
|
rlcinf = (rlc_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0);
|
|
if (!rlcinf) {
|
|
rlcinf = wmem_new0(wmem_packet_scope(), rlc_info);
|
|
}
|
|
macinf = (umts_mac_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0);
|
|
if (!macinf) {
|
|
macinf = wmem_new0(wmem_packet_scope(), umts_mac_info);
|
|
}
|
|
|
|
/**************************************/
|
|
/* HS-DCH data here (type 1 in R7) */
|
|
|
|
/* Frame Seq Nr */
|
|
if ((p_fp_info->release == 6) ||
|
|
(p_fp_info->release == 7)) {
|
|
|
|
guint8 frame_seq_no = (tvb_get_guint8(tvb, offset) & 0xf0) >> 4;
|
|
proto_tree_add_item(tree, hf_fp_frame_seq_nr, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " seqno=%u", frame_seq_no);
|
|
}
|
|
|
|
/* CmCH-PI */
|
|
proto_tree_add_item(tree, hf_fp_cmch_pi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* MAC-d PDU Length (13 bits) */
|
|
pdu_length = (tvb_get_ntohs(tvb, offset) >> 3);
|
|
proto_tree_add_item(tree, hf_fp_mac_d_pdu_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
macinf->pdu_len = pdu_length;
|
|
|
|
if ((p_fp_info->release == 6) ||
|
|
(p_fp_info->release == 7)) {
|
|
|
|
/* Flush bit */
|
|
proto_tree_add_item(tree, hf_fp_flush, tvb, offset-1, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* FSN/DRT reset bit */
|
|
proto_tree_add_item(tree, hf_fp_fsn_drt_reset, tvb, offset-1, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
|
|
/* Num of PDUs */
|
|
number_of_pdus = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_num_of_pdu, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* User buffer size */
|
|
user_buffer_size = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_user_buffer_size, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
header_length = offset;
|
|
|
|
|
|
/* Determine the UE ID to use in RLC */
|
|
user_identity = p_fp_info->com_context_id;
|
|
if(p_fp_info->urnti) {
|
|
user_identity = p_fp_info->urnti;
|
|
}
|
|
/************************/
|
|
/*Configure the pdus*/
|
|
for (i=0;i<number_of_pdus && i<MIN(MAX_MAC_FRAMES, MAX_RLC_CHANS); i++) {
|
|
macinf->content[i] = hsdsch_macdflow_id_mac_content_map[p_fp_info->hsdsch_macflowd_id]; /*MAC_CONTENT_PS_DTCH;*/
|
|
macinf->lchid[i] = fake_lchid_macd_flow[p_fp_info->hsdsch_macflowd_id];/*Faked logical channel id 255 used as a mark if it doesn't exist...*/
|
|
macinf->fake_chid[i] = TRUE; /**/
|
|
macinf->macdflow_id[i] = p_fp_info->hsdsch_macflowd_id; /*Save the flow ID (+1 to make it human readable (it's zero indexed!))*/
|
|
/*Figure out RLC_MODE based on MACd-flow-ID, basically MACd-flow-ID = 0 then it's SRB0 == UM else AM*/
|
|
rlcinf->mode[i] = hsdsch_macdflow_id_rlc_map[p_fp_info->hsdsch_macflowd_id];
|
|
|
|
|
|
/*Check if this is multiplexed (signaled by RRC)*/
|
|
if (p_fp_info->hsdhsch_macfdlow_is_mux[p_fp_info->hsdsch_macflowd_id] ) {
|
|
macinf->ctmux[i] = TRUE;
|
|
} else if (p_fp_info->hsdsch_macflowd_id == 0) { /*MACd-flow = 0 is often SRB */
|
|
expert_add_info(pinfo, NULL, &ei_fp_maybe_srb);
|
|
} else {
|
|
macinf->ctmux[i] = FALSE; /*Either it's multiplexed and not signled or it's not MUX*/
|
|
}
|
|
rlcinf->ueid[i] = user_identity;
|
|
rlcinf->li_size[i] = RLC_LI_7BITS;
|
|
rlcinf->deciphered[i] = FALSE;
|
|
rlcinf->ciphered[i] = FALSE;
|
|
rlcinf->rbid[i] = macinf->lchid[i];
|
|
|
|
#if 0
|
|
/*When a flow has been reconfigured rlc needs to be reset.
|
|
* This needs more work though since we must figure out when the re-configuration becomes
|
|
* active based on the CFN value
|
|
* */
|
|
/*Indicate we need to reset stream*/
|
|
if (p_fp_info->reset_frag) {
|
|
rlc_reset_channel(rlcinf->mode[i], macinf->lchid[i], p_fp_info->is_uplink, rlcinf->ueid[i] );
|
|
p_fp_info->reset_frag = FALSE;
|
|
|
|
}
|
|
#endif
|
|
}
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %ux%u-bit PDUs User-Buffer-Size=%u",
|
|
number_of_pdus, pdu_length, user_buffer_size);
|
|
|
|
/* MAC-d PDUs */
|
|
offset = dissect_macd_pdu_data(tvb, pinfo, tree, offset, pdu_length,
|
|
number_of_pdus, p_fp_info, data);
|
|
|
|
/* Extra IEs (if there is room for them) */
|
|
if (((p_fp_info->release == 6) ||
|
|
(p_fp_info->release == 7)) &&
|
|
(tvb_reported_length_remaining(tvb, offset) > 2)) {
|
|
|
|
int n;
|
|
guint8 flags;
|
|
/* guint8 flag_bytes = 0; */
|
|
|
|
/* New IE flags */
|
|
do {
|
|
proto_item *new_ie_flags_ti;
|
|
proto_tree *new_ie_flags_tree;
|
|
guint ies_found = 0;
|
|
|
|
/* Add new IE flags subtree */
|
|
new_ie_flags_ti = proto_tree_add_string_format(tree, hf_fp_hsdsch_new_ie_flags, tvb, offset, 1,
|
|
"", "New IE flags");
|
|
new_ie_flags_tree = proto_item_add_subtree(new_ie_flags_ti, ett_fp_hsdsch_new_ie_flags);
|
|
|
|
/* Read next byte */
|
|
flags = tvb_get_guint8(tvb, offset);
|
|
/* flag_bytes++; */
|
|
|
|
/* Dissect individual bits */
|
|
for (n=0; n < 8; n++) {
|
|
proto_tree_add_item(new_ie_flags_tree, hf_fp_hsdsch_new_ie_flag[n], tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
if ((flags >> (7-n)) & 0x01) {
|
|
ies_found++;
|
|
}
|
|
}
|
|
offset++;
|
|
|
|
proto_item_append_text(new_ie_flags_ti, " (%u IEs found)", ies_found);
|
|
|
|
/* Last bit set will indicate another flags byte follows... */
|
|
} while (0); /*((flags & 0x01) && (flag_bytes < 31));*/
|
|
|
|
if (1) /*(flags & 0x8) */ {
|
|
/* DRT is shown as mandatory in the diagram (3GPP TS 25.435 V6.3.0),
|
|
but the description below it states that
|
|
it should depend upon the first bit. The detailed description of
|
|
New IE flags doesn't agree, so treat as mandatory for now... */
|
|
proto_tree_add_item(tree, hf_fp_hsdsch_drt, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
}
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************/
|
|
/* Dissect an HSDSCH type 2 channel */
|
|
/* (introduced in Release 7) */
|
|
/* N.B. there is currently no support for */
|
|
/* frame type 3 (IuR only?) */
|
|
static void
|
|
dissect_hsdsch_type_2_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
guint16 header_length = 0;
|
|
|
|
/* Header CRC */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
}
|
|
else {
|
|
guint8 number_of_pdu_blocks;
|
|
gboolean drt_present = FALSE;
|
|
gboolean fach_present = FALSE;
|
|
guint16 user_buffer_size;
|
|
int n;
|
|
guint j;
|
|
|
|
#define MAX_PDU_BLOCKS 31
|
|
guint64 lchid[MAX_PDU_BLOCKS];
|
|
guint64 pdu_length[MAX_PDU_BLOCKS];
|
|
guint64 no_of_pdus[MAX_PDU_BLOCKS];
|
|
|
|
umts_mac_info *macinf;
|
|
rlc_info *rlcinf;
|
|
guint32 user_identity;
|
|
|
|
rlcinf = (rlc_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0);
|
|
if (!rlcinf) {
|
|
rlcinf = wmem_new0(wmem_packet_scope(), rlc_info);
|
|
}
|
|
macinf = (umts_mac_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0);
|
|
if (!macinf) {
|
|
macinf = wmem_new0(wmem_packet_scope(), umts_mac_info);
|
|
}
|
|
|
|
/********************************/
|
|
/* HS-DCH type 2 data here */
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, "(ehs)");
|
|
|
|
/* Frame Seq Nr (4 bits) */
|
|
if ((p_fp_info->release == 6) ||
|
|
(p_fp_info->release == 7)) {
|
|
|
|
guint8 frame_seq_no = (tvb_get_guint8(tvb, offset) & 0xf0) >> 4;
|
|
proto_tree_add_item(tree, hf_fp_frame_seq_nr, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " seqno=%u", frame_seq_no);
|
|
}
|
|
|
|
/* CmCH-PI (4 bits) */
|
|
proto_tree_add_item(tree, hf_fp_cmch_pi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Total number of PDU blocks (5 bits) */
|
|
number_of_pdu_blocks = (tvb_get_guint8(tvb, offset) >> 3);
|
|
proto_tree_add_item(tree, hf_fp_total_pdu_blocks, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (p_fp_info->release == 7) {
|
|
/* Flush bit */
|
|
proto_tree_add_item(tree, hf_fp_flush, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* FSN/DRT reset bit */
|
|
proto_tree_add_item(tree, hf_fp_fsn_drt_reset, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* DRT Indicator */
|
|
drt_present = tvb_get_guint8(tvb, offset) & 0x01;
|
|
proto_tree_add_item(tree, hf_fp_drt_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
offset++;
|
|
|
|
/* FACH Indicator flag */
|
|
fach_present = (tvb_get_guint8(tvb, offset) & 0x80) >> 7;
|
|
proto_tree_add_item(tree, hf_fp_fach_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* User buffer size */
|
|
user_buffer_size = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_user_buffer_size, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " User-Buffer-Size=%u", user_buffer_size);
|
|
|
|
|
|
|
|
/********************************************************************/
|
|
/* Now read number_of_pdu_blocks header entries */
|
|
for (n=0; n < number_of_pdu_blocks; n++) {
|
|
proto_item *pdu_block_header_ti;
|
|
proto_tree *pdu_block_header_tree;
|
|
int block_header_start_offset = offset;
|
|
|
|
/* Add PDU block header subtree */
|
|
pdu_block_header_ti = proto_tree_add_string_format(tree, hf_fp_hsdsch_pdu_block_header,
|
|
tvb, offset, 0,
|
|
"",
|
|
"PDU Block Header");
|
|
pdu_block_header_tree = proto_item_add_subtree(pdu_block_header_ti,
|
|
ett_fp_hsdsch_pdu_block_header);
|
|
|
|
/* MAC-d/c PDU length in this block (11 bits) */
|
|
proto_tree_add_bits_ret_val(pdu_block_header_tree, hf_fp_pdu_length_in_block, tvb,
|
|
(offset*8) + ((n % 2) ? 4 : 0), 11,
|
|
&pdu_length[n], ENC_BIG_ENDIAN);
|
|
if ((n % 2) == 0)
|
|
offset++;
|
|
else
|
|
offset += 2;
|
|
|
|
|
|
/* # PDUs in this block (4 bits) */
|
|
proto_tree_add_bits_ret_val(pdu_block_header_tree, hf_fp_pdus_in_block, tvb,
|
|
(offset*8) + ((n % 2) ? 0 : 4), 4,
|
|
&no_of_pdus[n], ENC_BIG_ENDIAN);
|
|
if ((n % 2) == 0) {
|
|
offset++;
|
|
}
|
|
|
|
/* Logical channel ID in block (4 bits) */
|
|
proto_tree_add_bits_ret_val(pdu_block_header_tree, hf_fp_lchid, tvb,
|
|
(offset*8) + ((n % 2) ? 4 : 0), 4,
|
|
&lchid[n], ENC_BIG_ENDIAN);
|
|
if ((n % 2) == 1) {
|
|
offset++;
|
|
}
|
|
else {
|
|
if (n == (number_of_pdu_blocks-1)) {
|
|
/* Byte is padded out for last block */
|
|
offset++;
|
|
}
|
|
}
|
|
|
|
/* Append summary to header tree root */
|
|
proto_item_append_text(pdu_block_header_ti,
|
|
" (lch:%u, %u pdus of %u bytes)",
|
|
(guint16)lchid[n],
|
|
(guint16)no_of_pdus[n],
|
|
(guint16)pdu_length[n]);
|
|
|
|
/* Set length of header tree item */
|
|
if (((n % 2) == 0) && (n < (number_of_pdu_blocks-1))) {
|
|
proto_item_set_len(pdu_block_header_ti,
|
|
offset - block_header_start_offset+1);
|
|
}
|
|
else {
|
|
proto_item_set_len(pdu_block_header_ti,
|
|
offset - block_header_start_offset);
|
|
}
|
|
}
|
|
|
|
if (header_length == 0) {
|
|
header_length = offset;
|
|
}
|
|
/**********************************************/
|
|
/* Optional fields indicated by earlier flags */
|
|
if (drt_present) {
|
|
/* DRT */
|
|
proto_tree_add_item(tree, hf_fp_drt, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
|
|
if (fach_present) {
|
|
/* H-RNTI: */
|
|
proto_tree_add_item(tree, hf_fp_hrnti, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* RACH Measurement Result */
|
|
proto_tree_add_item(tree, hf_fp_rach_measurement_result, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
|
|
|
|
/* Determine the UE ID to use in RLC */
|
|
user_identity = p_fp_info->com_context_id;
|
|
if(p_fp_info->urnti) {
|
|
user_identity = p_fp_info->urnti;
|
|
}
|
|
/********************************************************************/
|
|
/* Now read the MAC-d/c PDUs for each block using info from headers */
|
|
for (n=0; n < number_of_pdu_blocks; n++) {
|
|
for (j=0;j<no_of_pdus[n];j++) {
|
|
|
|
/*Configure (signal to lower layers) the PDU!*/
|
|
macinf->content[j] = lchId_type_table[lchid[n]+1];/*hsdsch_macdflow_id_mac_content_map[p_fp_info->hsdsch_macflowd_id];*/ /*MAC_CONTENT_PS_DTCH;*/
|
|
macinf->lchid[j] = (guint8)lchid[n]+1; /*Add 1 since C/T is zero indexed? ie C/T =0 => L-CHID = 1*/
|
|
macinf->macdflow_id[j] = p_fp_info->hsdsch_macflowd_id;
|
|
/*Figure out RLC_MODE based on MACd-flow-ID, basically MACd-flow-ID = 0 then it's SRB0 == UM else AM*/
|
|
rlcinf->mode[j] = lchId_rlc_map[lchid[n]+1];/*hsdsch_macdflow_id_rlc_map[p_fp_info->hsdsch_macflowd_id];*/
|
|
|
|
macinf->ctmux[n] = FALSE;
|
|
|
|
rlcinf->li_size[j] = RLC_LI_7BITS;
|
|
|
|
/** Configure ciphering **/
|
|
#if 0
|
|
/*If this entry exists, SECRUITY_MODE is completed*/
|
|
if ( rrc_ciph_inf && g_tree_lookup(rrc_ciph_inf, GINT_TO_POINTER((gint)p_fp_info->com_context_id)) ) {
|
|
rlcinf->ciphered[j] = TRUE;
|
|
} else {
|
|
rlcinf->ciphered[j] = FALSE;
|
|
}
|
|
#endif
|
|
rlcinf->ciphered[j] = FALSE;
|
|
rlcinf->deciphered[j] = FALSE;
|
|
rlcinf->rbid[j] = (guint8)lchid[n]+1;
|
|
|
|
rlcinf->ueid[j] = user_identity;
|
|
}
|
|
|
|
/* Add PDU block header subtree */
|
|
offset = dissect_macd_pdu_data_type_2(tvb, pinfo, tree, offset,
|
|
(guint16)pdu_length[n],
|
|
(guint16)no_of_pdus[n],
|
|
p_fp_info, data);
|
|
}
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
/**
|
|
* Dissect and CONFIGURE hsdsch_common channel.
|
|
*
|
|
* This will dissect hsdsch common channels of type 2, so this is
|
|
* very similar to regular type two (ehs) the difference being how
|
|
* the configuration is done. NOTE: VERY EXPERIMENTAL.
|
|
*
|
|
* @param tvb the tv buffer of the current data
|
|
* @param pinfo the packet info of the current data
|
|
* @param tree the tree to append this item to
|
|
* @param offset the offset in the tvb
|
|
* @param p_fp_info FP-packet information
|
|
*/
|
|
static
|
|
void dissect_hsdsch_common_channel_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
int offset, struct fp_info *p_fp_info,
|
|
void *data)
|
|
{
|
|
gboolean is_control_frame;
|
|
guint32 header_crc = 0;
|
|
proto_item * header_crc_pi = NULL;
|
|
guint header_length = 0;
|
|
|
|
/* Header CRC */
|
|
header_crc_pi = proto_tree_add_item_ret_uint(tree, hf_fp_header_crc, tvb, offset, 1, ENC_BIG_ENDIAN, &header_crc);
|
|
|
|
/* Frame Type */
|
|
proto_tree_add_item_ret_uint(tree, hf_fp_ft, tvb, offset, 1, ENC_BIG_ENDIAN, &is_control_frame);
|
|
offset++;
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, is_control_frame ? " [Control] " : " [Data] ");
|
|
|
|
if (is_control_frame) {
|
|
dissect_common_control(tvb, pinfo, tree, offset, p_fp_info);
|
|
/* For control frame the header CRC is actually frame CRC covering all
|
|
* bytes except the first */
|
|
if (preferences_header_checksum) {
|
|
verify_control_frame_crc(tvb, pinfo, header_crc_pi, (guint16)header_crc);
|
|
}
|
|
}
|
|
else {
|
|
guint8 number_of_pdu_blocks;
|
|
gboolean drt_present = FALSE;
|
|
gboolean fach_present = FALSE;
|
|
guint16 user_buffer_size;
|
|
int n;
|
|
guint j;
|
|
|
|
#define MAX_PDU_BLOCKS 31
|
|
guint64 lchid[MAX_PDU_BLOCKS];
|
|
guint64 pdu_length[MAX_PDU_BLOCKS];
|
|
guint64 no_of_pdus[MAX_PDU_BLOCKS];
|
|
guint8 newieflags = 0;
|
|
|
|
umts_mac_info *macinf;
|
|
rlc_info *rlcinf;
|
|
|
|
rlcinf = (rlc_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0);
|
|
if (!rlcinf) {
|
|
rlcinf = wmem_new0(wmem_packet_scope(), rlc_info);
|
|
}
|
|
macinf = (umts_mac_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0);
|
|
if (!macinf) {
|
|
macinf = wmem_new0(wmem_packet_scope(), umts_mac_info);
|
|
}
|
|
/********************************/
|
|
/* HS-DCH type 2 data here */
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, "(ehs)");
|
|
|
|
/* Frame Seq Nr (4 bits) */
|
|
if ((p_fp_info->release == 6) ||
|
|
(p_fp_info->release == 7)) {
|
|
|
|
guint8 frame_seq_no = (tvb_get_guint8(tvb, offset) & 0xf0) >> 4;
|
|
proto_tree_add_item(tree, hf_fp_frame_seq_nr, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " seqno=%u", frame_seq_no);
|
|
}
|
|
|
|
/* CmCH-PI (4 bits) */
|
|
proto_tree_add_item(tree, hf_fp_cmch_pi, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* Total number of PDU blocks (5 bits) */
|
|
number_of_pdu_blocks = (tvb_get_guint8(tvb, offset) >> 3);
|
|
proto_tree_add_item(tree, hf_fp_total_pdu_blocks, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (p_fp_info->release == 7) {
|
|
/* Flush bit */
|
|
proto_tree_add_item(tree, hf_fp_flush, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* FSN/DRT reset bit */
|
|
proto_tree_add_item(tree, hf_fp_fsn_drt_reset, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
/* DRT Indicator */
|
|
drt_present = tvb_get_guint8(tvb, offset) & 0x01;
|
|
proto_tree_add_item(tree, hf_fp_drt_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
offset++;
|
|
|
|
/* FACH Indicator flag */
|
|
fach_present = (tvb_get_guint8(tvb, offset) & 0x80) >> 7;
|
|
proto_tree_add_item(tree, hf_fp_fach_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
|
|
/* User buffer size */
|
|
user_buffer_size = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(tree, hf_fp_user_buffer_size, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " User-Buffer-Size=%u", user_buffer_size);
|
|
|
|
|
|
/********************************************************************/
|
|
/* Now read number_of_pdu_blocks header entries */
|
|
for (n=0; n < number_of_pdu_blocks; n++) {
|
|
proto_item *pdu_block_header_ti;
|
|
proto_tree *pdu_block_header_tree;
|
|
int block_header_start_offset = offset;
|
|
|
|
/* Add PDU block header subtree */
|
|
pdu_block_header_ti = proto_tree_add_string_format(tree, hf_fp_hsdsch_pdu_block_header,
|
|
tvb, offset, 0,
|
|
"",
|
|
"PDU Block Header");
|
|
pdu_block_header_tree = proto_item_add_subtree(pdu_block_header_ti,
|
|
ett_fp_hsdsch_pdu_block_header);
|
|
|
|
/* MAC-d/c PDU length in this block (11 bits) */
|
|
proto_tree_add_bits_ret_val(pdu_block_header_tree, hf_fp_pdu_length_in_block, tvb,
|
|
(offset*8) + ((n % 2) ? 4 : 0), 11,
|
|
&pdu_length[n], ENC_BIG_ENDIAN);
|
|
if ((n % 2) == 0)
|
|
offset++;
|
|
else
|
|
offset += 2;
|
|
|
|
|
|
/* # PDUs in this block (4 bits) */
|
|
proto_tree_add_bits_ret_val(pdu_block_header_tree, hf_fp_pdus_in_block, tvb,
|
|
(offset*8) + ((n % 2) ? 0 : 4), 4,
|
|
&no_of_pdus[n], ENC_BIG_ENDIAN);
|
|
if ((n % 2) == 0) {
|
|
offset++;
|
|
}
|
|
|
|
/* Logical channel ID in block (4 bits) */
|
|
proto_tree_add_bits_ret_val(pdu_block_header_tree, hf_fp_lchid, tvb,
|
|
(offset*8) + ((n % 2) ? 4 : 0), 4,
|
|
&lchid[n], ENC_BIG_ENDIAN);
|
|
if ((n % 2) == 1) {
|
|
offset++;
|
|
}
|
|
else {
|
|
if (n == (number_of_pdu_blocks-1)) {
|
|
/* Byte is padded out for last block */
|
|
offset++;
|
|
}
|
|
}
|
|
|
|
/* Append summary to header tree root */
|
|
proto_item_append_text(pdu_block_header_ti,
|
|
" (lch:%u, %u pdus of %u bytes)",
|
|
(guint16)lchid[n],
|
|
(guint16)no_of_pdus[n],
|
|
(guint16)pdu_length[n]);
|
|
|
|
/* Set length of header tree item */
|
|
if (((n % 2) == 0) && (n < (number_of_pdu_blocks-1))) {
|
|
proto_item_set_len(pdu_block_header_ti,
|
|
offset - block_header_start_offset+1);
|
|
}
|
|
else {
|
|
proto_item_set_len(pdu_block_header_ti,
|
|
offset - block_header_start_offset);
|
|
}
|
|
}
|
|
if (header_length == 0) {
|
|
header_length = offset;
|
|
}
|
|
|
|
/**********************************************/
|
|
/* Optional fields indicated by earlier flags */
|
|
if (drt_present) {
|
|
/* DRT */
|
|
proto_tree_add_item(tree, hf_fp_drt, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
|
|
if (fach_present) {
|
|
/* H-RNTI: */
|
|
proto_tree_add_item(tree, hf_fp_hrnti, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
|
|
/* RACH Measurement Result */
|
|
proto_tree_add_item(tree, hf_fp_rach_measurement_result, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
|
|
/********************************************************************/
|
|
/* Now read the MAC-d/c PDUs for each block using info from headers */
|
|
for (n=0; n < number_of_pdu_blocks; n++) {
|
|
tvbuff_t *next_tvb;
|
|
for (j=0; j<no_of_pdus[n]; j++) {
|
|
/* If all bits are set, then this is BCCH or PCCH according to: 25.435 paragraph: 6.2.7.31 */
|
|
if (lchid[n] == 0xF) {
|
|
/* In the very few test cases I've seen, this seems to be
|
|
* BCCH with transparent MAC layer. Therefore skip right to
|
|
* rlc_bcch and hope for the best. */
|
|
next_tvb = tvb_new_subset_length(tvb, offset, (gint)pdu_length[n]);
|
|
call_dissector_with_data(rlc_bcch_handle, next_tvb, pinfo, top_level_tree, data);
|
|
offset += (gint)pdu_length[n];
|
|
} else { /* Else go for CCCH UM, this seems to work. */
|
|
p_fp_info->hsdsch_entity = ehs; /* HSDSCH type 2 */
|
|
/* TODO: use cur_tb or subnum everywhere. */
|
|
p_fp_info->cur_tb = j; /* set cur_tb for MAC */
|
|
pinfo->fd->subnum = j; /* set subframe number for RRC */
|
|
macinf->content[j] = MAC_CONTENT_CCCH;
|
|
macinf->lchid[j] = (guint8)lchid[n]+1; /*Add 1 since it is zero indexed? */
|
|
macinf->macdflow_id[j] = p_fp_info->hsdsch_macflowd_id;
|
|
macinf->ctmux[j] = FALSE;
|
|
|
|
rlcinf->li_size[j] = RLC_LI_7BITS;
|
|
rlcinf->ciphered[j] = FALSE;
|
|
rlcinf->deciphered[j] = FALSE;
|
|
rlcinf->rbid[j] = (guint8)lchid[n]+1;
|
|
rlcinf->ueid[j] = p_fp_info->channel; /*We need to fake "UE ID"*/
|
|
|
|
next_tvb = tvb_new_subset_length(tvb, offset, (gint)pdu_length[n]);
|
|
call_dissector_with_data(mac_fdd_hsdsch_handle, next_tvb, pinfo, top_level_tree, data);
|
|
|
|
offset += (gint)pdu_length[n];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* New IE Flags */
|
|
newieflags = tvb_get_guint8(tvb, offset);
|
|
/* If newieflags == 0000 0010 then this indicates that there is a
|
|
* HS-DSCH physical layer category and no other New IE flags. */
|
|
if (newieflags == 2) {
|
|
/* HS-DSCH physical layer category presence bit. */
|
|
proto_tree_add_uint(tree, hf_fp_hsdsch_new_ie_flag[6], tvb, offset, 1, newieflags);
|
|
offset++;
|
|
/* HS-DSCH physical layer category. */
|
|
proto_tree_add_bits_item(tree, hf_fp_hsdsch_physical_layer_category, tvb, offset*8, 6, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
}
|
|
if (preferences_header_checksum) {
|
|
verify_header_crc(tvb, pinfo, header_crc_pi, header_crc, header_length);
|
|
}
|
|
/* Spare Extension and Payload CRC */
|
|
dissect_spare_extension_and_crc(tvb, pinfo, tree, 1, offset, header_length);
|
|
}
|
|
}
|
|
/* Validates the header CRC in a Control FP frame */
|
|
/* Should only be used in heuristic dissectors! */
|
|
static gboolean
|
|
check_control_frame_crc_for_heur(tvbuff_t * tvb)
|
|
{
|
|
guint8 crc = 0;
|
|
guint8 calc_crc = 0;
|
|
guint8 * data = NULL;
|
|
guint reported_length = tvb_reported_length(tvb);
|
|
|
|
if (reported_length == 0 || reported_length > tvb_captured_length(tvb))
|
|
return FALSE;
|
|
|
|
crc = tvb_get_guint8(tvb, 0) >> 1;
|
|
/* Get data. */
|
|
data = (guint8 *)tvb_memdup(wmem_packet_scope(), tvb, 0, tvb_reported_length(tvb));
|
|
/* Include only FT flag bit in CRC calculation. */
|
|
data[0] = data[0] & 1;
|
|
calc_crc = crc7update(0, data, tvb_reported_length(tvb));
|
|
calc_crc = crc7finalize(calc_crc);
|
|
|
|
return calc_crc == crc;
|
|
}
|
|
/* Validates the header CRC in a Data FP frame */
|
|
/* Should only be used in heuristic dissectors! */
|
|
static gboolean
|
|
check_header_crc_for_heur(tvbuff_t *tvb, guint16 header_length)
|
|
{
|
|
guint8 crc = 0;
|
|
guint8 calc_crc = 0;
|
|
const guint8 * data = NULL;
|
|
|
|
if (header_length > tvb_captured_length(tvb))
|
|
return FALSE;
|
|
|
|
crc = tvb_get_guint8(tvb, 0) >> 1;
|
|
/* Get data of header excluding the first byte */
|
|
data = tvb_get_ptr(tvb, 1, header_length - 1);
|
|
|
|
calc_crc = crc7update(0, data, header_length - 1);
|
|
calc_crc = crc7finalize(calc_crc);
|
|
|
|
return calc_crc == crc;
|
|
}
|
|
/* Validates the payload CRC in a Data FP frame */
|
|
/* Should only be used in heuristic dissectors! */
|
|
static gboolean
|
|
check_payload_crc_for_heur(tvbuff_t *tvb, guint16 header_length)
|
|
{
|
|
guint16 reported_length;
|
|
guint16 crc_index;
|
|
guint16 crc = 0;
|
|
guint16 calc_crc = 0;
|
|
guint16 payload_index;
|
|
guint16 payload_length;
|
|
const guint8 *data = NULL;
|
|
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (reported_length < 2 || reported_length > tvb_captured_length(tvb)) {
|
|
return FALSE;
|
|
}
|
|
/* Payload CRC is in the last 2 bytes of the packet */
|
|
crc_index = reported_length - 2;
|
|
crc = tvb_get_bits16(tvb, crc_index * 8, 16, ENC_BIG_ENDIAN);
|
|
|
|
payload_index = header_length; /* payload first index is the same as the header length */
|
|
payload_length = (reported_length - payload_index) - 2;
|
|
data = tvb_get_ptr(tvb, payload_index, payload_length);
|
|
calc_crc = crc16_8005_noreflect_noxor(data, payload_length);
|
|
|
|
return calc_crc == crc;
|
|
}
|
|
/* Generates a unique 32bit identifier based on the frame's metadata */
|
|
/* This ID is used in the RLC dissector for reassembly */
|
|
/* Should only be used in heuristic dissectors! */
|
|
static guint32
|
|
generate_ue_id_for_heur(packet_info *pinfo)
|
|
{
|
|
if (pinfo->ptype == PT_UDP && pinfo->src.type == AT_IPv4 && pinfo->dst.type == AT_IPv4) {
|
|
/* This logic assumes FP is delivered over IP/UDP*/
|
|
/* Will return the same ID even if the address and ports are reversed */
|
|
|
|
/* srcXor: [ ------- Source Address ------- ] (4 bytes)*/
|
|
/* XOR */
|
|
/* [ Source Port ][ Source Port ] (4 bytes)*/
|
|
int srcXor = pntoh32(pinfo->src.data) ^ ((pinfo->srcport << 16) | (pinfo->srcport));
|
|
|
|
/* dstXor: [ ---- Destination Address ---- ] (4 bytes)*/
|
|
/* XOR */
|
|
/* [ - Dest Port - ][ - Dest Port - ] (4 bytes)*/
|
|
int dstXor = pntoh32(pinfo->dst.data) ^ ((pinfo->destport << 16) | (pinfo->destport));
|
|
return srcXor ^ dstXor;
|
|
}
|
|
else {
|
|
/* Fallback - When IP and/or UDP are missing for whatever reason */
|
|
/* Using the frame number of the first heuristicly dissected frame as the UE ID should be unique enough */
|
|
/* The bitwise NOT operator is used to prevent low UE ID values which are likely to collide */
|
|
/* with legitimate UE IDs derived from C-RNTIs in FACH/RACH */
|
|
return ~(pinfo->num);
|
|
}
|
|
}
|
|
/* Fills common PCH information in a 'fp conversation info' object */
|
|
/* Should only be used in heuristic dissectors! */
|
|
static void
|
|
fill_pch_conversation_info_for_heur(umts_fp_conversation_info_t* umts_fp_conversation_info ,packet_info *pinfo)
|
|
{
|
|
umts_fp_conversation_info->iface_type = IuB_Interface;
|
|
umts_fp_conversation_info->division = Division_FDD;
|
|
umts_fp_conversation_info->dl_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->ul_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->dch_crc_present = 1;
|
|
umts_fp_conversation_info->com_context_id = generate_ue_id_for_heur(pinfo);
|
|
umts_fp_conversation_info->rlc_mode = FP_RLC_AM;
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->src);
|
|
umts_fp_conversation_info->crnc_port = pinfo->srcport;
|
|
umts_fp_conversation_info->channel = CHANNEL_PCH;
|
|
umts_fp_conversation_info->num_dch_in_flow = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].num_dl_chans = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_num_tbs[1] = 1;
|
|
umts_fp_conversation_info->channel_specific_info = (void*)wmem_new0(wmem_file_scope(), fp_pch_channel_info_t);
|
|
}
|
|
/* Attaches conversation info to both the downlink and uplink 'conversations' (streams) */
|
|
/* (Required since only one of them is checked in every dissected FP packet) */
|
|
/* Should only be used in heuristic dissectors! */
|
|
static void
|
|
set_both_sides_umts_fp_conv_data(packet_info *pinfo, umts_fp_conversation_info_t *umts_fp_conversation_info)
|
|
{
|
|
conversation_t *packet_direction_conv;
|
|
conversation_t *other_direction_conv;
|
|
|
|
if (pinfo == NULL) {
|
|
return;
|
|
}
|
|
|
|
/* Finding or creating conversation for the way the packet is heading */
|
|
packet_direction_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (packet_direction_conv == NULL) {
|
|
/* Conversation does not exist yet, creating one now. */
|
|
packet_direction_conv = conversation_new(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
}
|
|
conversation_add_proto_data(packet_direction_conv, proto_fp, umts_fp_conversation_info);
|
|
|
|
/* Finding or creating conversation for the other side */
|
|
other_direction_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_src, &pinfo->net_dst,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->srcport, pinfo->destport, NO_ADDR_B);
|
|
|
|
if (other_direction_conv == NULL) {
|
|
/* Conversation does not exist yet, creating one now. */
|
|
other_direction_conv = conversation_new(pinfo->num, &pinfo->net_src, &pinfo->net_dst,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->srcport, pinfo->destport, NO_ADDR_B);
|
|
}
|
|
conversation_add_proto_data(other_direction_conv, proto_fp, umts_fp_conversation_info);
|
|
|
|
}
|
|
static gboolean
|
|
heur_dissect_fp_dcch_over_dch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
struct fp_info *p_fp_info;
|
|
guint32 captured_length;
|
|
guint32 reported_length;
|
|
guint8 frame_type;
|
|
guint8 tfi;
|
|
guint8 pch_collisions_byte;
|
|
|
|
/* Trying to find existing conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv != NULL) {
|
|
/* Checking if the conversation was already framed */
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
if (umts_fp_conversation_info->channel == CHANNEL_DCH) {
|
|
conversation_set_dissector(p_conv, fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else if (umts_fp_conversation_info->channel != CHANNEL_UNKNOWN){
|
|
/* This conversation was successfuly framed as ANOTHER type */
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Making sure FP info isn't already attached */
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
if (p_fp_info) {
|
|
return FALSE;
|
|
}
|
|
|
|
frame_type = tvb_get_guint8(tvb, 0) & 0x01;
|
|
if (frame_type == 1) { /* is 'control' frame type*/
|
|
return FALSE;
|
|
}
|
|
|
|
/* Making sure we have at least enough bytes for header (3) + footer (2) */
|
|
captured_length = tvb_captured_length(tvb);
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (captured_length < 5) {
|
|
return FALSE;
|
|
}
|
|
tfi = tvb_get_guint8(tvb, 2) & 0x1f;
|
|
|
|
/* Checking if this is a DCH frame with 0 TBs*/
|
|
if (tfi == 0x00)
|
|
{
|
|
if (reported_length != 5 /* DL */ && reported_length != 7 /* UL */) {
|
|
return FALSE;
|
|
}
|
|
if (!check_header_crc_for_heur(tvb, 3)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, 3)) {
|
|
return FALSE;
|
|
}
|
|
/* All checks passed - This is an unknown DCH FP frame. */
|
|
/* To allow dissection of this frame after umts_fp_conversation_info will be added in a later frame */
|
|
/* the conversation must be created here if it doesn't exist yet*/
|
|
if (p_conv == NULL) {
|
|
conversation_new(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* Checking this is a DCH frame with 1 TB */
|
|
if (tfi != 0x01) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Expecting specific lengths: 24 for downlink frames, 26 for uplink frames */
|
|
/* This is the common Transport Format of DCCH over DCH ( See 3GPP TR 25.944 / 4.1.1.3.1.1 ) */
|
|
if (reported_length != 24 /* DL */ && reported_length != 26 /* UL */) {
|
|
return FALSE;
|
|
}
|
|
|
|
if (!check_header_crc_for_heur(tvb, 3)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, 3)) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Checking if the 4th byte in the frame is zeroed. In this case the CRC checks aren't */
|
|
/* deterministic enough to gurantee this is a DCH since this packet could also be a PCH frame */
|
|
/* with PI Bitmap of 18 bytes + 0 TBs (Both CRCs will match for both formats) */
|
|
pch_collisions_byte = tvb_get_guint8(tvb, 3);
|
|
if (pch_collisions_byte == 0) {
|
|
return FALSE;
|
|
}
|
|
|
|
if(!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
umts_fp_conversation_info->iface_type = IuB_Interface;
|
|
umts_fp_conversation_info->division = Division_FDD;
|
|
umts_fp_conversation_info->dl_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->ul_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->dch_crc_present = 1;
|
|
umts_fp_conversation_info->com_context_id = generate_ue_id_for_heur(pinfo);
|
|
umts_fp_conversation_info->rlc_mode = FP_RLC_AM;
|
|
if (reported_length == 24) { /* Downlink */
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->src);
|
|
umts_fp_conversation_info->crnc_port = pinfo->srcport;
|
|
}
|
|
else { /* Uplink*/
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->dst);
|
|
umts_fp_conversation_info->crnc_port = pinfo->destport;
|
|
}
|
|
umts_fp_conversation_info->channel = CHANNEL_DCH;
|
|
umts_fp_conversation_info->num_dch_in_flow = 1;
|
|
umts_fp_conversation_info->dch_ids_in_flow_list[0] = 31;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].num_dl_chans = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_num_tbs[1] = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_tf_size[1] = 148;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].num_ul_chans = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].ul_chan_num_tbs[1] = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].ul_chan_tf_size[1] = 148;
|
|
conversation_set_dissector(find_or_create_conversation(pinfo), fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
static gboolean
|
|
heur_dissect_fp_fach1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
fp_fach_channel_info_t* fp_fach_channel_info;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
struct fp_info *p_fp_info;
|
|
guint32 captured_length;
|
|
guint32 reported_length;
|
|
guint8 frame_type;
|
|
guint8 tfi;
|
|
guint8 tctf;
|
|
|
|
/* Finding or creating conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv != NULL) {
|
|
/* Checking if the conversation was already framed */
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
if (umts_fp_conversation_info->channel == CHANNEL_FACH_FDD) {
|
|
conversation_set_dissector(p_conv, fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else if (umts_fp_conversation_info->channel != CHANNEL_UNKNOWN){
|
|
/* This conversation was successfuly framed as ANOTHER type */
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
/* Making sure we have at least enough bytes for header (4) + footer (2) */
|
|
captured_length = tvb_captured_length(tvb);
|
|
if(captured_length < 6) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Expecting specific lengths: 51 for frames with 1 TB */
|
|
/* This is a common Transport Format of FACH ( See 3GPP TR 25.944 / 4.1.1.2 'FACH1' ) */
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (reported_length != 51) {
|
|
return FALSE;
|
|
}
|
|
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
|
|
/* Making sure FP info isn't already attached */
|
|
if (p_fp_info) {
|
|
return FALSE;
|
|
}
|
|
|
|
frame_type = tvb_get_guint8(tvb, 0) & 0x01;
|
|
if (frame_type == 1) { /* is 'control' frame type*/
|
|
/* We can't tell the FP type and content of control frames */
|
|
return FALSE;
|
|
}
|
|
|
|
tfi = tvb_get_guint8(tvb, 2) & 0x1f;
|
|
if (tfi != 0x01) {
|
|
return FALSE;
|
|
}
|
|
|
|
tctf = tvb_get_guint8(tvb, 4);
|
|
/* Asserting the TCTF field contains a valid (non reserved) value according to TS 25.321 Table 9.2.1-2 */
|
|
if (tctf != 0x40 && /* CCCH */
|
|
tctf != 0x50 && /* MCCH */
|
|
tctf != 0x5F && /* MSCH */
|
|
tctf != 0x80 && /* CTCH */
|
|
(tctf >> 4) != 0x06 && /* MTCH */
|
|
(tctf >> 6) != 0x00 && /* BCCH */
|
|
(tctf >> 6) != 0x03) { /* DCCH or DTCH over FACH */
|
|
return FALSE;
|
|
}
|
|
|
|
if (!check_header_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
|
|
if(!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
umts_fp_conversation_info->iface_type = IuB_Interface;
|
|
umts_fp_conversation_info->division = Division_FDD;
|
|
umts_fp_conversation_info->dl_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->ul_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->dch_crc_present = 1;
|
|
umts_fp_conversation_info->com_context_id = generate_ue_id_for_heur(pinfo);
|
|
umts_fp_conversation_info->rlc_mode = FP_RLC_AM;
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->src);
|
|
umts_fp_conversation_info->crnc_port = pinfo->srcport;
|
|
umts_fp_conversation_info->channel = CHANNEL_FACH_FDD;
|
|
umts_fp_conversation_info->num_dch_in_flow = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].num_dl_chans = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_num_tbs[1] = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_tf_size[1] = 360;
|
|
/* Adding the 'channel specific info' for FACH */
|
|
fp_fach_channel_info = wmem_new0(wmem_file_scope(), fp_fach_channel_info_t);
|
|
fp_fach_channel_info->crnti_to_urnti_map = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
umts_fp_conversation_info->channel_specific_info = (void*)fp_fach_channel_info;
|
|
|
|
conversation_set_dissector(find_or_create_conversation(pinfo), fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
static gboolean
|
|
heur_dissect_fp_fach2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
fp_fach_channel_info_t* fp_fach_channel_info;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
struct fp_info *p_fp_info;
|
|
guint32 captured_length;
|
|
guint32 reported_length;
|
|
guint8 frame_type;
|
|
guint8 tfi;
|
|
guint8 tctf;
|
|
|
|
/* Finding or creating conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv != NULL) {
|
|
/* Checking if the conversation was already framed */
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
if (umts_fp_conversation_info->channel == CHANNEL_FACH_FDD) {
|
|
conversation_set_dissector(p_conv, fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else if (umts_fp_conversation_info->channel != CHANNEL_UNKNOWN){
|
|
/* This conversation was successfuly framed as ANOTHER type */
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
/* Making sure we have at least enough bytes for header (4) + footer (2) */
|
|
captured_length = tvb_captured_length(tvb);
|
|
if(captured_length < 6) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Expecting specific lengths: 27 for frames with 1 TB, 48 for frames with 2 TBs */
|
|
/* This is a common Transport Format of FACH ( See 3GPP TR 25.944 / 4.1.1.2 'FACH2' ) */
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (reported_length != 27 && reported_length != 48) {
|
|
return FALSE;
|
|
}
|
|
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
|
|
/* Making sure FP info isn't already attached */
|
|
if (p_fp_info) {
|
|
return FALSE;
|
|
}
|
|
|
|
frame_type = tvb_get_guint8(tvb, 0) & 0x01;
|
|
if (frame_type == 1) { /* is 'control' frame type*/
|
|
/* We can't tell the FP type and content of control frames */
|
|
return FALSE;
|
|
}
|
|
|
|
tfi = tvb_get_guint8(tvb, 2) & 0x1f;
|
|
if (reported_length == 27 && tfi != 0x01) {
|
|
return FALSE;
|
|
}
|
|
if (reported_length == 48 && tfi != 0x02) {
|
|
return FALSE;
|
|
}
|
|
|
|
tctf = tvb_get_guint8(tvb, 4);
|
|
/* Asserting the TCTF field contains a valid (non reserved) value according to TS 25.321 Table 9.2.1-2 */
|
|
if (tctf != 0x40 && /* CCCH */
|
|
tctf != 0x50 && /* MCCH */
|
|
tctf != 0x5F && /* MSCH */
|
|
tctf != 0x80 && /* CTCH */
|
|
(tctf >> 4) != 0x06 && /* MTCH */
|
|
(tctf >> 6) != 0x00 && /* BCCH */
|
|
(tctf >> 6) != 0x03) { /* DCCH or DTCH over FACH */
|
|
return FALSE;
|
|
}
|
|
|
|
if (!check_header_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
|
|
if(!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
umts_fp_conversation_info->iface_type = IuB_Interface;
|
|
umts_fp_conversation_info->division = Division_FDD;
|
|
umts_fp_conversation_info->dl_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->ul_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->dch_crc_present = 1;
|
|
umts_fp_conversation_info->com_context_id = generate_ue_id_for_heur(pinfo);
|
|
umts_fp_conversation_info->rlc_mode = FP_RLC_AM;
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->src);
|
|
umts_fp_conversation_info->crnc_port = pinfo->srcport;
|
|
umts_fp_conversation_info->channel = CHANNEL_FACH_FDD;
|
|
umts_fp_conversation_info->num_dch_in_flow = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].num_dl_chans = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_num_tbs[1] = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_tf_size[1] = 168;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_num_tbs[2] = 2;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_tf_size[2] = 168;
|
|
/* Adding the 'channel specific info' for FACH */
|
|
fp_fach_channel_info = wmem_new0(wmem_file_scope(), fp_fach_channel_info_t);
|
|
fp_fach_channel_info->crnti_to_urnti_map = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
umts_fp_conversation_info->channel_specific_info = (void*)fp_fach_channel_info;
|
|
|
|
conversation_set_dissector(find_or_create_conversation(pinfo), fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
static gboolean
|
|
heur_dissect_fp_rach(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
fp_rach_channel_info_t* fp_rach_channel_info;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
struct fp_info *p_fp_info;
|
|
guint32 captured_length;
|
|
guint32 reported_length;
|
|
guint8 frame_type;
|
|
guint8 tfi;
|
|
guint8 tctf;
|
|
|
|
/* Finding or creating conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv != NULL) {
|
|
/* Checking if the conversation was already framed */
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
if (umts_fp_conversation_info->channel == CHANNEL_RACH_FDD) {
|
|
conversation_set_dissector(p_conv, fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else if (umts_fp_conversation_info->channel != CHANNEL_UNKNOWN){
|
|
/* This conversation was successfuly framed as ANOTHER type */
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Making sure we have at least enough bytes for header (4) + footer (2) */
|
|
captured_length = tvb_captured_length(tvb);
|
|
if(captured_length < 6) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Expecting specific lengths: rach frames are either 28 or 52 bytes long */
|
|
/* This is the common Transport Formats of RACH ( See 3GPP TR 25.944 / 4.1.2.1 ) */
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (reported_length != 28 && reported_length != 52) {
|
|
return FALSE;
|
|
}
|
|
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
|
|
/* Making sure FP info isn't already attached */
|
|
if (p_fp_info) {
|
|
return FALSE;
|
|
}
|
|
|
|
frame_type = tvb_get_guint8(tvb, 0) & 0x01;
|
|
if (frame_type == 1) { /* is 'control' frame type*/
|
|
/* We can't tell the FP type and content of control frames */
|
|
return FALSE;
|
|
}
|
|
|
|
tfi = tvb_get_guint8(tvb, 2) & 0x1f;
|
|
if (reported_length == 28 && tfi != 0x00) {
|
|
return FALSE;
|
|
}
|
|
if (reported_length == 52 && tfi != 0x01) {
|
|
return FALSE;
|
|
}
|
|
|
|
tctf = tvb_get_guint8(tvb, 4) >> 6;
|
|
/* Asserting the TCTF field contains a valid (non reserved) value according to TS 25.321 Table 9.2.1-4 */
|
|
if (tctf != 0x00 && /* CCCH */
|
|
tctf != 0x01) /* DCCH over RACH */
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
if (!check_header_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
|
|
if(!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
umts_fp_conversation_info->iface_type = IuB_Interface;
|
|
umts_fp_conversation_info->division = Division_FDD;
|
|
umts_fp_conversation_info->dl_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->ul_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->dch_crc_present = 1;
|
|
umts_fp_conversation_info->com_context_id = generate_ue_id_for_heur(pinfo);
|
|
umts_fp_conversation_info->rlc_mode = FP_RLC_AM;
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->dst);
|
|
umts_fp_conversation_info->crnc_port = pinfo->destport;
|
|
umts_fp_conversation_info->channel = CHANNEL_RACH_FDD;
|
|
umts_fp_conversation_info->num_dch_in_flow = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].num_ul_chans = 0;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].ul_chan_num_tbs[0] = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].ul_chan_num_tbs[1] = 1;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].ul_chan_tf_size[0] = 168;
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].ul_chan_tf_size[1] = 360;
|
|
|
|
/* Adding the 'channel specific info' for RACH */
|
|
fp_rach_channel_info = wmem_new0(wmem_file_scope(), fp_rach_channel_info_t);
|
|
fp_rach_channel_info->crnti_to_urnti_map = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
umts_fp_conversation_info->channel_specific_info = (void*)fp_rach_channel_info;
|
|
|
|
conversation_set_dissector(find_or_create_conversation(pinfo), fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
static gboolean
|
|
heur_dissect_fp_pch(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
fp_pch_channel_info_t* fp_pch_channel_info = NULL;
|
|
struct fp_info *p_fp_info;
|
|
gboolean conversation_initialized = FALSE;
|
|
guint32 captured_length;
|
|
guint32 reported_length;
|
|
guint8 frame_type;
|
|
guint8 reserved_bits;
|
|
guint8 tfi;
|
|
guint8 pi_byte_length;
|
|
guint16 tb_byte_length;
|
|
gboolean pi_present;
|
|
gboolean tb_size_found;
|
|
gboolean pi_length_found;
|
|
guint8 cfn_lowest_bits;
|
|
guint8 dch_collisions_byte;
|
|
|
|
/* To correctly dissect a PCH stream 2 parameters are required: PI Bitmap length & TB length */
|
|
/* Both are optional in each packet and having them both in a packet without knowing any of them */
|
|
/* is not helpful.*/
|
|
/* Hence gathering the info from 2 different frames is required. */
|
|
|
|
/* Finding or creating conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv != NULL) {
|
|
/* Checking if the conversation was already framed */
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
fp_pch_channel_info = (fp_pch_channel_info_t*)umts_fp_conversation_info->channel_specific_info;
|
|
/* Making sure this conversation type is "PCH" and the PCH channel info is present */
|
|
if (umts_fp_conversation_info->channel == CHANNEL_PCH && fp_pch_channel_info != NULL) {
|
|
conversation_initialized = TRUE;
|
|
pi_length_found = fp_pch_channel_info->paging_indications != 0;
|
|
tb_size_found = umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_tf_size[1] != 0;
|
|
if (pi_length_found && tb_size_found) {
|
|
/* Stream already framed - contains both PI length and TB size */
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
}
|
|
else if (umts_fp_conversation_info->channel != CHANNEL_UNKNOWN){
|
|
/* This conversation was successfuly framed as ANOTHER type */
|
|
return FALSE;
|
|
}
|
|
else {
|
|
/* FP conversation info attached and the channel type is UNKNOWN - might be PCH */
|
|
tb_size_found = FALSE;
|
|
pi_length_found = FALSE;
|
|
}
|
|
}
|
|
else {
|
|
/* FP conversation info not attached - no PCH info is known */
|
|
tb_size_found = FALSE;
|
|
pi_length_found = FALSE;
|
|
}
|
|
}
|
|
else {
|
|
/* A conversation does not exist yet - no PCH info is known */
|
|
tb_size_found = FALSE;
|
|
pi_length_found = FALSE;
|
|
}
|
|
|
|
/* Making sure we have at least enough bytes for header (4) + footer (2) */
|
|
captured_length = tvb_captured_length(tvb);
|
|
if(captured_length < 6) {
|
|
return FALSE;
|
|
}
|
|
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
/* Making sure FP info isn't already attached */
|
|
if (p_fp_info) {
|
|
return FALSE;
|
|
}
|
|
|
|
frame_type = tvb_get_guint8(tvb, 0) & 0x01;
|
|
if (frame_type == 1) { /* is 'control' frame type*/
|
|
/* We can't tell the FP type and content of control frames */
|
|
return FALSE;
|
|
}
|
|
|
|
/* Checking bits after CFN and before PI indicator are zeroed */
|
|
reserved_bits = tvb_get_guint8(tvb, 2) & 0x0E;
|
|
if (reserved_bits != 0x00) {
|
|
return FALSE;
|
|
}
|
|
|
|
tfi = tvb_get_guint8(tvb, 3) & 0x1f;
|
|
if (tfi != 0x00 && tfi != 0x01) {
|
|
return FALSE;
|
|
}
|
|
|
|
if (!check_header_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, 4)) {
|
|
return FALSE;
|
|
}
|
|
|
|
reported_length = tvb_reported_length(tvb);
|
|
pi_present = tvb_get_guint8(tvb, 2) & 0x01; /* Rightmost bit in the 3rd byte */
|
|
if (pi_present) {
|
|
if (tfi == 0x00 && !pi_length_found) {
|
|
/* PI Bitmap present and No TB. Can calculate PI bitmap length */
|
|
guint8 pi_bit_length;
|
|
pi_byte_length = reported_length - 6; /* Removing header length (4) and footer length (2)*/
|
|
switch (pi_byte_length)
|
|
{
|
|
case 3: /* 18 bits bitmap + padding */
|
|
pi_bit_length = 18;
|
|
break;
|
|
case 5: /* 36 bits bitmap + padding */
|
|
pi_bit_length = 36;
|
|
break;
|
|
case 9: /* 72 bits bitmap */
|
|
pi_bit_length = 72;
|
|
break;
|
|
case 18: /* 144 bits bitmap */
|
|
pi_bit_length = 144;
|
|
break;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
|
|
if (pi_bit_length == 144 && !tb_size_found) {
|
|
/* Nothing has confirmed yet that this channel is a PCH since */
|
|
/* both 'tb_size_found' and 'pi_length_found' are false. */
|
|
/* Checking if the 4 LSB bits of the CFN (the 4 leftmost bits in the 3rd byte) aren't zeroed. */
|
|
/* if they aren't this is probably PCH because those are reserved in DCH */
|
|
cfn_lowest_bits = tvb_get_guint8(tvb, 2) & 0xF0;
|
|
if(cfn_lowest_bits == 0) {
|
|
/* Checking if the 4th byte in the frame is zeroed. In this case the CRC checks aren't */
|
|
/* deterministic enough to gurantee this is a PCH since this packet could also be a DCH frame */
|
|
/* with MAC's C/T is 0 and 4 leftmost bits of RLC are 0 */
|
|
dch_collisions_byte = tvb_get_guint8(tvb, 3);
|
|
if (dch_collisions_byte == 0) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
if(!conversation_initialized) {
|
|
fill_pch_conversation_info_for_heur(umts_fp_conversation_info, pinfo);
|
|
fp_pch_channel_info = (fp_pch_channel_info_t*)umts_fp_conversation_info->channel_specific_info;
|
|
}
|
|
fp_pch_channel_info->paging_indications = pi_bit_length;
|
|
pi_length_found = TRUE;
|
|
}
|
|
else if (tfi == 0x01 && !tb_size_found && pi_length_found) {
|
|
/* TB present and PI bitmap length is known. Can calculate TB length.*/
|
|
pi_byte_length = (fp_pch_channel_info->paging_indications + 7) / 8;
|
|
if (!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
if(!conversation_initialized) {
|
|
fill_pch_conversation_info_for_heur(umts_fp_conversation_info, pinfo);
|
|
}
|
|
tb_byte_length = (reported_length - (pi_byte_length + 6)); /* Removing header length (4), footer length (2) and PI bitmap length*/
|
|
/* Possible TB lengths for PCH is 10 or 30 bytes ( See 3GPP TR 25.944 / 4.1.1.2 ) */
|
|
if (tb_byte_length == 10 || tb_byte_length == 30) {
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_tf_size[1] = tb_byte_length * 8;
|
|
tb_size_found = TRUE;
|
|
}
|
|
}
|
|
/* TODO: It should be possible to figure both PI & TB sizes if both are present in a frame and neither is known */
|
|
/* Since the total size of the frame should be unique */
|
|
/* e.g. 19 bytes = header (4) + PI 18bits (3) + TB (10) + footer (2)*/
|
|
/* 21 bytes = header (4) + PI 36bits (5) + TB (10) + footer (2)*/
|
|
/* etc... */
|
|
/* This could mostly help dissect 'busy' PCHs where most of the frames have both PI & TB*/
|
|
}
|
|
else {
|
|
if (tfi == 0x01 && !tb_size_found) {
|
|
/* TB present and PI bitmap is missing. Can calculate TB length.*/
|
|
if (!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
if(!conversation_initialized) {
|
|
fill_pch_conversation_info_for_heur(umts_fp_conversation_info, pinfo);
|
|
}
|
|
tb_byte_length = (reported_length - 6); /* Removing header length (4), footer length (2) */
|
|
/* Possible TB lengths for PCH is 10 or 30 bytes ( See 3GPP TR 25.944 / 4.1.1.2 ) */
|
|
if (tb_byte_length == 10 || tb_byte_length == 30) {
|
|
umts_fp_conversation_info->fp_dch_channel_info[0].dl_chan_tf_size[1] = tb_byte_length * 8;
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
tb_size_found = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pi_length_found && tb_size_found) {
|
|
/* Stream completely framed! */
|
|
conversation_set_dissector(find_or_create_conversation(pinfo), fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else {
|
|
/* Some data still missing */
|
|
return FALSE;
|
|
}
|
|
}
|
|
static gboolean
|
|
heur_dissect_fp_hsdsch_type_1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
fp_hsdsch_channel_info_t* fp_hsdsch_channel_info;
|
|
struct fp_info *p_fp_info;
|
|
guint32 captured_length;
|
|
guint32 reported_length;
|
|
guint8 frame_type;
|
|
guint16 mac_d_pdu_length;
|
|
guint16 num_of_pdus;
|
|
guint32 expected_total_size;
|
|
guint32 next_pdu_index;
|
|
guint16 index_step;
|
|
guint8 pre_pdu_padding;
|
|
|
|
/* Trying to find existing conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv != NULL) {
|
|
/* Checking if the conversation was already framed */
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
fp_hsdsch_channel_info = (fp_hsdsch_channel_info_t*)umts_fp_conversation_info->channel_specific_info;
|
|
if (umts_fp_conversation_info->channel == CHANNEL_HSDSCH && fp_hsdsch_channel_info->hsdsch_entity == hs) {
|
|
conversation_set_dissector(p_conv, fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else if (umts_fp_conversation_info->channel != CHANNEL_UNKNOWN){
|
|
/* This conversation was successfuly framed as ANOTHER type */
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Making sure FP info isn't already attached */
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
if (p_fp_info) {
|
|
return FALSE;
|
|
}
|
|
|
|
captured_length = tvb_reported_length(tvb);
|
|
/* Lengths limit: header size (7) + at least 1 PDU Block (2) + CRC Payload size (2)*/
|
|
if (captured_length < 11) {
|
|
return FALSE;
|
|
}
|
|
|
|
frame_type = tvb_get_guint8(tvb, 0) & 0x01;
|
|
if (frame_type == 1) { /* is 'control' frame type*/
|
|
return FALSE;
|
|
}
|
|
|
|
/* Lengths limit: Smallest HS-DSCH type 1 data frame is 55 bytes (1 PDU of 336 bits) */
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (reported_length < 55) {
|
|
return FALSE;
|
|
}
|
|
|
|
mac_d_pdu_length = tvb_get_guint16(tvb, 2, ENC_NA) >> 3;
|
|
/* Only valid PDU lengths are 336 or 656 */
|
|
if (mac_d_pdu_length != 336 && mac_d_pdu_length != 656) {
|
|
return FALSE;
|
|
}
|
|
|
|
num_of_pdus = tvb_get_guint8(tvb, 4);
|
|
/* PDUs count shouldn't be 0*/
|
|
if (num_of_pdus == 0) {
|
|
return FALSE;
|
|
}
|
|
/* Maximum PDUs count constraint: 32 PDUs * 336 bits or 17 PDUs * 656 bits */
|
|
if ((mac_d_pdu_length == 336 && num_of_pdus > 32) || (mac_d_pdu_length == 656 && num_of_pdus > 17)) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Making sure the expected packet size is smaller/equals to the entire packet's size */
|
|
expected_total_size = (num_of_pdus * mac_d_pdu_length / 8) + 7 /*Header length*/ + 2 /*Footer length*/;
|
|
if (expected_total_size > captured_length || expected_total_size > reported_length) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Iterating through the PDUs making sure the padding nibble is present in all of them */
|
|
next_pdu_index = 7;
|
|
index_step = mac_d_pdu_length / 8;
|
|
for (int i = 0; i < num_of_pdus; i++)
|
|
{
|
|
pre_pdu_padding = tvb_get_guint8(tvb, next_pdu_index) >> 4;
|
|
if (pre_pdu_padding != 0x00)
|
|
{
|
|
/* One of the padding nibbles is not zeroed */
|
|
return FALSE;
|
|
}
|
|
next_pdu_index += index_step;
|
|
}
|
|
|
|
if (!check_header_crc_for_heur(tvb, 7)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, 7)) {
|
|
return FALSE;
|
|
}
|
|
|
|
if(!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
umts_fp_conversation_info->iface_type = IuB_Interface;
|
|
umts_fp_conversation_info->division = Division_FDD;
|
|
umts_fp_conversation_info->dl_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->ul_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->dch_crc_present = 1;
|
|
umts_fp_conversation_info->com_context_id = generate_ue_id_for_heur(pinfo);
|
|
umts_fp_conversation_info->rlc_mode = FP_RLC_AM;
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->src);
|
|
umts_fp_conversation_info->crnc_port = pinfo->srcport;
|
|
umts_fp_conversation_info->channel = CHANNEL_HSDSCH;
|
|
fp_hsdsch_channel_info = wmem_new0(wmem_file_scope(), fp_hsdsch_channel_info_t);
|
|
fp_hsdsch_channel_info->hsdsch_entity = hs;
|
|
fp_hsdsch_channel_info->hsdsch_macdflow_id = 0;
|
|
umts_fp_conversation_info->channel_specific_info = (void*)fp_hsdsch_channel_info;
|
|
|
|
conversation_set_dissector(find_or_create_conversation(pinfo), fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
static gboolean
|
|
heur_dissect_fp_hsdsch_type_2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
fp_hsdsch_channel_info_t* fp_hsdsch_channel_info;
|
|
struct fp_info *p_fp_info;
|
|
guint32 captured_length;
|
|
guint32 reported_length;
|
|
guint8 frame_type;
|
|
guint8 reserved_fach_ind_bits;
|
|
guint8 pdu_block_header_reserved_bit;
|
|
guint8 pdu_block_headers_count;
|
|
guint16 next_pdu_block_header_index;
|
|
guint16 pdu_block_header_pdu_length;
|
|
guint8 pdu_block_header_pdus_count;
|
|
guint8 pdu_block_header_lchid;
|
|
guint32 total_header_length;
|
|
guint32 expected_payload_length;
|
|
|
|
/* Trying to find existing conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv != NULL) {
|
|
/* Checking if the conversation was already framed */
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
fp_hsdsch_channel_info = (fp_hsdsch_channel_info_t*)umts_fp_conversation_info->channel_specific_info;
|
|
if (umts_fp_conversation_info->channel == CHANNEL_HSDSCH && fp_hsdsch_channel_info->hsdsch_entity == ehs) {
|
|
conversation_set_dissector(p_conv, fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else if (umts_fp_conversation_info->channel != CHANNEL_UNKNOWN){
|
|
/* This conversation was successfuly framed as ANOTHER type */
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Making sure FP info isn't already attached */
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
if (p_fp_info) {
|
|
return FALSE;
|
|
}
|
|
|
|
captured_length = tvb_reported_length(tvb);
|
|
reported_length = tvb_reported_length(tvb);
|
|
/* Lengths limit: header size + at least 1 PDU Block Header + CRC Payload size */
|
|
if (captured_length < 11) {
|
|
return FALSE;
|
|
}
|
|
|
|
frame_type = tvb_get_guint8(tvb, 0) & 0x01;
|
|
if (frame_type == 1) { /* is 'control' frame type*/
|
|
return FALSE;
|
|
}
|
|
|
|
pdu_block_header_reserved_bit = (tvb_get_guint8(tvb, 7) & 0x10) >> 4;
|
|
if (pdu_block_header_reserved_bit == 0x1) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Expecting at least 1 PDU Block Header */
|
|
pdu_block_headers_count = tvb_get_guint8(tvb, 2) >> 3;
|
|
if (pdu_block_headers_count == 0) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Getting 3 rightmost bits in the FACH Indicator's byte, which are reserved and should be 0 */
|
|
reserved_fach_ind_bits = tvb_get_guint8(tvb, 3) & 0x03;
|
|
if (reserved_fach_ind_bits != 0x00) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Iterating through the block headers looking for invalid fields and */
|
|
/* calculating the expected total packet length */
|
|
total_header_length = 6;
|
|
expected_payload_length = 0;
|
|
for (int i = 0; i < pdu_block_headers_count; i++)
|
|
{
|
|
/* Making sure the next index is not out of range */
|
|
if (((guint32)(8 + (i * 3))) >= captured_length) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Getting blocks length and count from the i-th header */
|
|
if (i % 2 == 0) {
|
|
next_pdu_block_header_index = (i * 25) / 10;
|
|
}
|
|
else {
|
|
next_pdu_block_header_index = (((i-1) * 25) / 10) + 2;
|
|
}
|
|
pdu_block_header_pdu_length = tvb_get_guint16(tvb, 6 + next_pdu_block_header_index, ENC_NA) >> 5;
|
|
pdu_block_header_pdus_count = tvb_get_guint8(tvb, 7 + next_pdu_block_header_index) & 0x0F;
|
|
pdu_block_header_lchid = tvb_get_guint8(tvb, 8 + next_pdu_block_header_index) >> 4;
|
|
|
|
|
|
/* Making sure PDUs' Length isn't zeroed*/
|
|
if (pdu_block_header_pdu_length == 0) {
|
|
return FALSE;
|
|
}
|
|
/* Making sure PDUs Count isn't zeroed */
|
|
if (pdu_block_header_pdus_count == 0) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Adding this header's length to expected length*/
|
|
if (i % 2 == 0) {
|
|
total_header_length += 3;
|
|
}
|
|
else {
|
|
total_header_length += 2;
|
|
}
|
|
/* Adding this header's paylod's size to expected length*/
|
|
expected_payload_length += (pdu_block_header_pdu_length * pdu_block_header_pdus_count);
|
|
|
|
/* Checking padding after lchid */
|
|
if ((tvb_get_guint8(tvb, 8 + (i * 3)) & 0x0F) != 0x00) {
|
|
return FALSE;
|
|
}
|
|
/* Checking lchid for reserved value 0x0F*/
|
|
|
|
if (pdu_block_header_lchid == 0x0F) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
/* Adding Payload CRC'slength to payload length*/
|
|
expected_payload_length += 2;
|
|
/* Calculated expected packet size must not exceed captured length or reported length*/
|
|
if ((total_header_length + expected_payload_length) > captured_length || (total_header_length + expected_payload_length) > reported_length) {
|
|
return FALSE;
|
|
}
|
|
|
|
if (!check_header_crc_for_heur(tvb, total_header_length)) {
|
|
return FALSE;
|
|
}
|
|
if (!check_payload_crc_for_heur(tvb, total_header_length)) {
|
|
return FALSE;
|
|
}
|
|
|
|
if(!umts_fp_conversation_info) {
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
}
|
|
umts_fp_conversation_info->iface_type = IuB_Interface;
|
|
umts_fp_conversation_info->division = Division_FDD;
|
|
umts_fp_conversation_info->dl_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->ul_frame_number = pinfo->num;
|
|
umts_fp_conversation_info->dch_crc_present = 1;
|
|
umts_fp_conversation_info->com_context_id = generate_ue_id_for_heur(pinfo);
|
|
umts_fp_conversation_info->rlc_mode = FP_RLC_AM;
|
|
copy_address_wmem(wmem_file_scope(), &(umts_fp_conversation_info->crnc_address), &pinfo->src);
|
|
umts_fp_conversation_info->crnc_port = pinfo->srcport;
|
|
umts_fp_conversation_info->channel = CHANNEL_HSDSCH;
|
|
fp_hsdsch_channel_info = wmem_new0(wmem_file_scope(), fp_hsdsch_channel_info_t);
|
|
fp_hsdsch_channel_info->hsdsch_entity = ehs;
|
|
fp_hsdsch_channel_info->hsdsch_macdflow_id = 1;
|
|
umts_fp_conversation_info->channel_specific_info = (void*)fp_hsdsch_channel_info;
|
|
|
|
conversation_set_dissector(find_or_create_conversation(pinfo), fp_handle);
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
/* This method can frame UDP streams containing FP packets but dissection of those packets will */
|
|
/* fail since the FP conversation info is never attached */
|
|
/* Usefull for DCH streams containing CS data and don't have their own heuristic method */
|
|
static gboolean
|
|
heur_dissect_fp_unknown_format(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
conversation_t *p_conv;
|
|
umts_fp_conversation_info_t* umts_fp_conversation_info = NULL;
|
|
struct fp_info *p_fp_info;
|
|
guint32 length;
|
|
guint8 frame_type;
|
|
gboolean is_control = FALSE;
|
|
|
|
/* Trying to find existing conversation */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
/* Check if FP Conversation Info is attached */
|
|
if (p_conv != NULL) {
|
|
umts_fp_conversation_info = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
if (umts_fp_conversation_info) {
|
|
if (umts_fp_conversation_info->channel == CHANNEL_UNKNOWN) {
|
|
/* This stream was framed using a previous control frame, we can call FP dissector without further tests*/
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
|
|
/* Check if per-frame FP Info is attached*/
|
|
if(p_fp_info) {
|
|
/* if FP info is present, check that it really is an ethernet link */
|
|
if (p_fp_info->link_type != FP_Link_Ethernet) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* discriminate 'lower' UDP layer from 'user data' UDP layer
|
|
* (i.e. if an FP over UDP packet contains a user UDP packet */
|
|
if (p_fp_info->srcport != pinfo->srcport ||
|
|
p_fp_info->destport != pinfo->destport)
|
|
return FALSE;
|
|
|
|
/* assume this is FP */
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Both per-frame FP info and conversation FP info are missing */
|
|
/* Try to frame control frames using header CRC */
|
|
is_control = (tvb_get_guint8(tvb, 0) & 0x01) == 1;
|
|
if(!is_control) {
|
|
/* This is a Data frame, can't tell if it's FP. */
|
|
return FALSE;
|
|
}
|
|
|
|
length = tvb_captured_length(tvb);
|
|
/* Length limit: control frames header is 2 bytes */
|
|
if (length < 2) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check 'Frame Type' */
|
|
frame_type = tvb_get_guint8(tvb, 1);
|
|
/* 0x00 is unused for both dedicated & common FP */
|
|
if( frame_type == 0x00 ) {
|
|
return FALSE;
|
|
}
|
|
/* Max frame types are: */
|
|
/* For common channels: 0x0E */
|
|
/* For dedicated channels: 0x0B */
|
|
/* The left nibble is zeroed in both cases */
|
|
if( (frame_type & 0xF0) != 0x00) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* Checking Header CRC*/
|
|
if (!check_control_frame_crc_for_heur(tvb)) {
|
|
/* The CRC is incorrect */
|
|
return FALSE;
|
|
}
|
|
|
|
/* The CRC is correct! */
|
|
/* Attaching 'FP Conversation Info' the the UDP conversation so other */
|
|
/* packets (both Control AND Data) will be marked as FP */
|
|
umts_fp_conversation_info = wmem_new0(wmem_file_scope(), umts_fp_conversation_info_t);
|
|
umts_fp_conversation_info->channel = CHANNEL_UNKNOWN;
|
|
set_both_sides_umts_fp_conv_data(pinfo, umts_fp_conversation_info);
|
|
/* Call FP Dissector for the current frame */
|
|
dissect_fp(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
|
|
/* This method wraps the heuristic dissectors of all supported channels */
|
|
static gboolean
|
|
heur_dissect_fp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
gboolean match;
|
|
|
|
match = heur_dissect_fp_dcch_over_dch(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
match = heur_dissect_fp_fach1(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
match = heur_dissect_fp_fach2(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
match = heur_dissect_fp_rach(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
match = heur_dissect_fp_pch(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
match = heur_dissect_fp_hsdsch_type_1(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
match = heur_dissect_fp_hsdsch_type_2(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
/* NOTE: Add new heuristic dissectors BEFORE the 'unknown format' dissector */
|
|
/* since it might 'swallow' packets if the UDP stream is framed as 'CHANNEL_UNKNOWN' */
|
|
match = heur_dissect_fp_unknown_format(tvb, pinfo, tree, data);
|
|
if(match)
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static guint8 fakes =5; /*[] ={1,5,8};*/
|
|
static guint8 fake_map[256];
|
|
|
|
/*
|
|
* TODO: This need to be fixed!
|
|
* Basically you would want the actual RRC messages, that sooner or later maps
|
|
* transport channel id's to logical id's or RAB IDs
|
|
* to set the proper logical channel/RAB ID, but for now we make syntethic ones.
|
|
* */
|
|
|
|
static guint8
|
|
make_fake_lchid(packet_info *pinfo _U_, gint trchld)
|
|
{
|
|
if ( fake_map[trchld] == 0) {
|
|
fake_map[trchld] = fakes;
|
|
fakes++;
|
|
}
|
|
return fake_map[trchld];
|
|
}
|
|
|
|
/* Tries to resolve the U-RNTI of a channel user based on info in the fp conv info */
|
|
static void fp_conv_resolve_urnti(umts_fp_conversation_info_t *p_conv_data)
|
|
{
|
|
/* Trying to resolve the U-RNTI of the user if missing */
|
|
/* Resolving based on the 'C-RNC Communication Context' field found in NBAP */
|
|
if (!p_conv_data->urnti && p_conv_data->com_context_id != 0) {
|
|
guint32 * mapped_urnti = (guint32 *)(wmem_tree_lookup32(nbap_crncc_urnti_map,p_conv_data->com_context_id));
|
|
if (mapped_urnti != 0) {
|
|
p_conv_data->urnti = GPOINTER_TO_UINT(mapped_urnti);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Figures the best "UE ID" to use in RLC reassembly logic */
|
|
static guint32 get_ue_id_from_conv(umts_fp_conversation_info_t *p_conv_data)
|
|
{
|
|
guint32 user_identity;
|
|
/* Choosing RLC 'UE ID': */
|
|
/* 1. Preferring the U-RNTI if attached */
|
|
/* 2. Fallback - Using the 'C-RNC Communication Context' used in NBAP for this user */
|
|
user_identity = p_conv_data->com_context_id;
|
|
if(p_conv_data->urnti) {
|
|
user_identity = p_conv_data->urnti;
|
|
}
|
|
return user_identity;
|
|
}
|
|
|
|
static fp_info *
|
|
fp_set_per_packet_inf_from_conv(conversation_t *p_conv,
|
|
umts_fp_conversation_info_t *p_conv_data,
|
|
tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree _U_)
|
|
{
|
|
fp_info *fpi;
|
|
guint8 tfi, c_t;
|
|
int offset = 0, i=0, j=0, num_tbs, chan, tb_size, tb_bit_off;
|
|
gboolean is_control_frame;
|
|
gboolean is_known_dcch_tf,is_stndalone_ps_rab_tf,is_muxed_cs_ps_tf;
|
|
umts_mac_info *macinf;
|
|
rlc_info *rlcinf;
|
|
guint8 fake_lchid=0;
|
|
gint *cur_val=NULL;
|
|
fp_hsdsch_channel_info_t* fp_hsdsch_channel_info = NULL;
|
|
fp_edch_channel_info_t* fp_edch_channel_info = NULL;
|
|
fp_pch_channel_info_t *fp_pch_channel_info = NULL;
|
|
fp_fach_channel_info_t* fp_fach_channel_info = NULL;
|
|
fp_rach_channel_info_t* fp_rach_channel_info = NULL;
|
|
gboolean info_missing = FALSE;
|
|
|
|
fpi = wmem_new0(wmem_file_scope(), fp_info);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_fp, 0, fpi);
|
|
|
|
fpi->iface_type = p_conv_data->iface_type;
|
|
fpi->division = p_conv_data->division;
|
|
fpi->release = 7; /* Set values greater then the checks performed */
|
|
fpi->release_year = 2006;
|
|
fpi->release_month = 12;
|
|
fpi->channel = p_conv_data->channel;
|
|
fpi->dch_crc_present = p_conv_data->dch_crc_present;
|
|
fpi->link_type = FP_Link_Ethernet;
|
|
|
|
#if 0
|
|
/*Only do this the first run, signals that we need to reset the RLC fragtable*/
|
|
if (!PINFO_FD_VISITED(pinfo) && p_conv_data->reset_frag ) {
|
|
fpi->reset_frag = p_conv_data->reset_frag;
|
|
p_conv_data->reset_frag = FALSE;
|
|
}
|
|
#endif
|
|
/* remember 'lower' UDP layer port information so we can later
|
|
* differentiate 'lower' UDP layer from 'user data' UDP layer */
|
|
fpi->srcport = pinfo->srcport;
|
|
fpi->destport = pinfo->destport;
|
|
|
|
fpi->com_context_id = p_conv_data->com_context_id;
|
|
if(!p_conv_data->urnti) {
|
|
fp_conv_resolve_urnti(p_conv_data);
|
|
}
|
|
fpi->urnti = p_conv_data->urnti;
|
|
|
|
if (pinfo->link_dir == P2P_DIR_UL) {
|
|
fpi->is_uplink = TRUE;
|
|
} else {
|
|
fpi->is_uplink = FALSE;
|
|
}
|
|
|
|
is_control_frame = tvb_get_guint8(tvb, offset) & 0x01;
|
|
|
|
switch (fpi->channel) {
|
|
case CHANNEL_HSDSCH: /* HS-DSCH - High Speed Downlink Shared Channel */
|
|
fp_hsdsch_channel_info = (fp_hsdsch_channel_info_t*)p_conv_data->channel_specific_info;
|
|
if(fp_hsdsch_channel_info == NULL) {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_fp_no_per_conv_channel_info, tvb, offset, -1,
|
|
"Can't dissect HS-DSCH FP stream because no per-conversation channel info was attached!");
|
|
info_missing = TRUE;
|
|
break;
|
|
}
|
|
fpi->hsdsch_entity = fp_hsdsch_channel_info->hsdsch_entity;
|
|
macinf = wmem_new0(wmem_file_scope(), umts_mac_info);
|
|
fpi->hsdsch_macflowd_id = fp_hsdsch_channel_info->hsdsch_macdflow_id;
|
|
macinf->content[0] = hsdsch_macdflow_id_mac_content_map[fp_hsdsch_channel_info->hsdsch_macdflow_id]; /*MAC_CONTENT_PS_DTCH;*/
|
|
macinf->lchid[0] = fp_hsdsch_channel_info->hsdsch_macdflow_id;
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0, macinf);
|
|
|
|
rlcinf = wmem_new0(wmem_file_scope(), rlc_info);
|
|
|
|
/*Figure out RLC_MODE based on MACd-flow-ID, basically MACd-flow-ID = 0 then it's SRB0 == UM else AM*/
|
|
rlcinf->mode[0] = hsdsch_macdflow_id_rlc_map[fp_hsdsch_channel_info->hsdsch_macdflow_id];
|
|
|
|
if (fpi->hsdsch_entity == hs) {
|
|
for (i=0; i<MAX_NUM_HSDHSCH_MACDFLOW; i++) {
|
|
/*Figure out if this channel is multiplexed (signaled from RRC)*/
|
|
if ((cur_val=(gint *)g_tree_lookup(hsdsch_muxed_flows, GINT_TO_POINTER((gint)fp_hsdsch_channel_info->hrnti))) != NULL) {
|
|
j = 1 << i;
|
|
fpi->hsdhsch_macfdlow_is_mux[i] = j & *cur_val;
|
|
} else {
|
|
fpi->hsdhsch_macfdlow_is_mux[i] = FALSE;
|
|
}
|
|
|
|
}
|
|
}
|
|
rlcinf->ueid[0] = get_ue_id_from_conv(p_conv_data);
|
|
rlcinf->li_size[0] = RLC_LI_7BITS;
|
|
rlcinf->ciphered[0] = FALSE;
|
|
rlcinf->deciphered[0] = FALSE;
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0, rlcinf);
|
|
|
|
return fpi;
|
|
|
|
case CHANNEL_EDCH:
|
|
fp_edch_channel_info = (fp_edch_channel_info_t*)p_conv_data->channel_specific_info;
|
|
if(fp_edch_channel_info == NULL) {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_fp_no_per_conv_channel_info, tvb, offset, -1,
|
|
"Can't dissect E-DCH FP stream because no per-conversation channel info was attached!");
|
|
info_missing = TRUE;
|
|
break;
|
|
}
|
|
macinf = wmem_new0(wmem_file_scope(), umts_mac_info);
|
|
rlcinf = wmem_new0(wmem_file_scope(), rlc_info);
|
|
fpi->no_ddi_entries = fp_edch_channel_info->no_ddi_entries;
|
|
for (i=0; i<fpi->no_ddi_entries; i++) {
|
|
fpi->edch_ddi[i] = fp_edch_channel_info->edch_ddi[i]; /*Set the DDI value*/
|
|
fpi->edch_macd_pdu_size[i] = fp_edch_channel_info->edch_macd_pdu_size[i]; /*Set the PDU size*/
|
|
fpi->edch_lchId[i] = fp_edch_channel_info->edch_lchId[i]; /*Set the channel id for this entry*/
|
|
}
|
|
fpi->edch_type = fp_edch_channel_info->edch_type;
|
|
|
|
rlcinf->ueid[0] = get_ue_id_from_conv(p_conv_data);
|
|
rlcinf->li_size[0] = RLC_LI_7BITS;
|
|
rlcinf->ciphered[0] = FALSE;
|
|
rlcinf->deciphered[0] = FALSE;
|
|
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0, macinf);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0, rlcinf);
|
|
|
|
return fpi;
|
|
|
|
case CHANNEL_PCH:
|
|
fp_pch_channel_info = (fp_pch_channel_info_t*)p_conv_data->channel_specific_info;
|
|
if(fp_pch_channel_info == NULL) {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_fp_no_per_conv_channel_info, tvb, offset, -1,
|
|
"Can't dissect PCH FP stream because no per-conversation channel info was attached!");
|
|
info_missing = TRUE;
|
|
break;
|
|
}
|
|
fpi->paging_indications = fp_pch_channel_info->paging_indications;
|
|
fpi->num_chans = p_conv_data->num_dch_in_flow;
|
|
|
|
if (is_control_frame) {
|
|
/* control frame, we're done */
|
|
return fpi;
|
|
}
|
|
/* Inesrting Paging Indication Info extracted from the previous packet */
|
|
fpi->relevant_paging_indications = fp_pch_channel_info->last_paging_indication_info;
|
|
fp_pch_channel_info->last_paging_indication_info = NULL;
|
|
|
|
/* Set offset to TFI */
|
|
offset = 3;
|
|
break;
|
|
case CHANNEL_DCH:
|
|
fpi->num_chans = p_conv_data->num_dch_in_flow;
|
|
if (is_control_frame) {
|
|
/* control frame, we're done */
|
|
return fpi;
|
|
}
|
|
|
|
rlcinf = wmem_new0(wmem_file_scope(), rlc_info);
|
|
macinf = wmem_new0(wmem_file_scope(), umts_mac_info);
|
|
offset = 2; /* Set offset to TFI */
|
|
fakes = 5; /* Reset fake counter */
|
|
for (chan=0; chan < fpi->num_chans; chan++) { /* Iterate over the DCH channels in the flow (each given a TFI) */
|
|
/* TFI is 5 bits according to 3GPP TS 25.427, paragraph 6.2.4.4 */
|
|
tfi = tvb_get_bits8(tvb, 3+offset*8, 5);
|
|
|
|
/* Figure out the number of TBs and size */
|
|
num_tbs = (fpi->is_uplink) ?
|
|
p_conv_data->fp_dch_channel_info[chan].ul_chan_num_tbs[tfi] :
|
|
p_conv_data->fp_dch_channel_info[chan].dl_chan_num_tbs[tfi];
|
|
tb_size = (fpi->is_uplink) ?
|
|
p_conv_data->fp_dch_channel_info[chan].ul_chan_tf_size[tfi] :
|
|
p_conv_data->fp_dch_channel_info[chan].dl_chan_tf_size[tfi];
|
|
|
|
tb_bit_off = (2+p_conv_data->num_dch_in_flow)*8; /*Point to the C/T of first TB*/
|
|
/* Iterate over the Transport Blocks */
|
|
/* Set configuration for each individual block */
|
|
for (j=0; j < num_tbs && j+chan < MAX_MAC_FRAMES; j++) {
|
|
/* Set transport channel id (useful for debugging) */
|
|
macinf->trchid[j+chan] = p_conv_data->dch_ids_in_flow_list[chan];
|
|
|
|
/* Checking for the common Transport Format of 3.4 kbps SRBs for DCCH ( See 3GPP TR 25.944 / 4.1.1.3.1.1 ) */
|
|
is_known_dcch_tf = (tfi == 1 && num_tbs == 1 && tb_size == 148);
|
|
/* Checking for Transport Format of interactive or background PS RAB ( See 3GPP TS 34.108 / 6.10.2.4.1.23 -> 6.10.2.4.1.35 ) */
|
|
is_stndalone_ps_rab_tf = tb_size == 336;
|
|
/* Checking for Transport Format of muxed CS & PS RABs ( See 3GPP TS 34.108 / 6.10.2.4.1.38 -> 6.10.2.4.1.51 ) */
|
|
is_muxed_cs_ps_tf = (p_conv_data->dch_ids_in_flow_list[chan] == 24 && tb_size == 340);
|
|
|
|
if (is_known_dcch_tf || is_muxed_cs_ps_tf) {
|
|
/* Channel is multiplexed (ie. C/T flag present) */
|
|
macinf->ctmux[j+chan] = TRUE;
|
|
|
|
/* Peek at C/T, different RLC params for different logical channels */
|
|
/* C/T is 4 bits according to 3GPP TS 25.321, paragraph 9.2.1, from MAC header (not FP) */
|
|
c_t = (tvb_get_bits8(tvb, tb_bit_off, 4) + 1) % 0xf;
|
|
macinf->lchid[j+chan] = c_t; /* Logical Channel ID is the value in C/T */
|
|
macinf->content[j+chan] = lchId_type_table[c_t]; /* Base MAC content on logical channel id (Table is in packet-nbap.h) */
|
|
rlcinf->mode[j+chan] = lchId_rlc_map[c_t]; /* Base RLC mode on logical channel id */
|
|
}
|
|
else if (is_stndalone_ps_rab_tf) {
|
|
/* Channel isn't multiplexed (ie. C/T flag not present) */
|
|
macinf->ctmux[j+chan] = FALSE;
|
|
|
|
/* Using a fake 'interactive PS' DTCH logical channel id */
|
|
/* TODO: Once proper lchid is always set, this has to be changed */
|
|
macinf->fake_chid[j+chan] = TRUE;
|
|
macinf->lchid[j+chan] = 11;
|
|
macinf->content[j+chan] = MAC_CONTENT_PS_DTCH;
|
|
rlcinf->mode[j+chan] = RLC_AM;
|
|
}
|
|
else {
|
|
/* Unfamiliar DCH format, faking LCHID */
|
|
/* Asuming the channel isn't multiplexed (ie. C/T flag not present) */
|
|
macinf->ctmux[j+chan] = FALSE;
|
|
|
|
/* TODO: This stuff has to be reworked! */
|
|
/* Generates a fake logical channel id for non multiplexed channel */
|
|
fake_lchid = make_fake_lchid(pinfo, p_conv_data->dch_ids_in_flow_list[chan]);
|
|
macinf->content[j+chan] = lchId_type_table[fake_lchid];
|
|
rlcinf->mode[j+chan] = lchId_rlc_map[fake_lchid];
|
|
|
|
/************************/
|
|
/* TODO: Once proper lchid is always set, this has to be removed */
|
|
macinf->fake_chid[j+chan] = TRUE;
|
|
macinf->lchid[j+chan] = fake_lchid;
|
|
/************************/
|
|
}
|
|
|
|
/* Set RLC data */
|
|
rlcinf->ueid[j + chan] = get_ue_id_from_conv(p_conv_data);
|
|
rlcinf->li_size[j+chan] = RLC_LI_7BITS;
|
|
rlcinf->ciphered[j+chan] = FALSE;
|
|
rlcinf->deciphered[j+chan] = FALSE;
|
|
rlcinf->rbid[j+chan] = macinf->lchid[j+chan];
|
|
|
|
/*Step over this TB and it's C/T flag.*/
|
|
tb_bit_off += tb_size+4;
|
|
}
|
|
|
|
offset++;
|
|
}
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0, macinf);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0, rlcinf);
|
|
/* Set offset to point to first TFI */
|
|
offset = 2;
|
|
break;
|
|
case CHANNEL_FACH_FDD:
|
|
fp_fach_channel_info = (fp_fach_channel_info_t*)p_conv_data->channel_specific_info;
|
|
if(fp_fach_channel_info == NULL) {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_fp_no_per_conv_channel_info, tvb, offset, -1,
|
|
"Can't dissect FACH FP stream because no per-conversation channel info was attached!");
|
|
info_missing = TRUE;
|
|
break;
|
|
}
|
|
fpi->num_chans = p_conv_data->num_dch_in_flow;
|
|
if (is_control_frame) {
|
|
/* control frame, we're done */
|
|
return fpi;
|
|
}
|
|
/* Set offset to TFI */
|
|
offset = 2;
|
|
/* Set MAC data */
|
|
macinf = wmem_new0(wmem_file_scope(), umts_mac_info);
|
|
macinf->ctmux[0] = 1;
|
|
macinf->content[0] = MAC_CONTENT_DCCH;
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0, macinf);
|
|
/* Set RLC data */
|
|
rlcinf = wmem_new0(wmem_file_scope(), rlc_info);
|
|
/* For RLC reassembly to work we need to fake a "UE ID" as an identifier of this stream.*/
|
|
/* Using the (UDP) conversation's ID and the prefix of 0xFFF */
|
|
rlcinf->ueid[0] = (p_conv->conv_index | 0xFFF00000);
|
|
rlcinf->mode[0] = RLC_AM;
|
|
rlcinf->li_size[0] = RLC_LI_7BITS;
|
|
rlcinf->ciphered[0] = FALSE;
|
|
rlcinf->deciphered[0] = FALSE;
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0, rlcinf);
|
|
break;
|
|
|
|
case CHANNEL_RACH_FDD:
|
|
fp_rach_channel_info = (fp_rach_channel_info_t*)p_conv_data->channel_specific_info;
|
|
if(fp_rach_channel_info == NULL) {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_fp_no_per_conv_channel_info, tvb, offset, -1,
|
|
"Can't dissect RACH FP stream because no per-conversation channel info was attached!");
|
|
info_missing = TRUE;
|
|
break;
|
|
}
|
|
fpi->num_chans = p_conv_data->num_dch_in_flow;
|
|
if (is_control_frame) {
|
|
/* control frame, we're done */
|
|
return fpi;
|
|
}
|
|
/* Set offset to TFI */
|
|
offset = 2;
|
|
/* set MAC & RLC data */
|
|
macinf = wmem_new0(wmem_file_scope(), umts_mac_info);
|
|
rlcinf = wmem_new0(wmem_file_scope(), rlc_info);
|
|
for ( chan = 0; chan < fpi->num_chans; chan++ ) {
|
|
macinf->ctmux[chan] = 1;
|
|
macinf->content[chan] = MAC_CONTENT_DCCH;
|
|
/* RLC dissector's reassembly requires a non-zero stream identifier ('UE ID') to work */
|
|
/* For DCCH: MAC dissector will override this with C-RNTI/U-RNTI */
|
|
/* For CCCH: RLC's mode is TM and the dissector does not reassemble at all - showing 0 in the UI to indicate that */
|
|
rlcinf->ueid[chan] = 0;
|
|
}
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0, macinf);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0, rlcinf);
|
|
break;
|
|
case CHANNEL_HSDSCH_COMMON:
|
|
rlcinf = wmem_new0(wmem_file_scope(), rlc_info);
|
|
macinf = wmem_new0(wmem_file_scope(), umts_mac_info);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_mac, 0, macinf);
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_umts_rlc, 0, rlcinf);
|
|
break;
|
|
default:
|
|
expert_add_info(pinfo, NULL, &ei_fp_transport_channel_type_unknown);
|
|
info_missing = TRUE;
|
|
break;
|
|
}
|
|
|
|
if(info_missing) {
|
|
/* Some information was missing in the conversation struct and the FP info isn't complete */
|
|
p_remove_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
wmem_free(wmem_file_scope(), fpi);
|
|
return NULL;
|
|
}
|
|
|
|
/* Peek at the packet as the per packet info seems not to take the tfi into account */
|
|
for (i=0; i<fpi->num_chans; i++) {
|
|
/*TFI is 5 bits according to 3GPP TS 25.427, paragraph 6.2.4.4*/
|
|
tfi = tvb_get_guint8(tvb, offset) & 0x1f;
|
|
if (pinfo->link_dir == P2P_DIR_UL) {
|
|
fpi->chan_tf_size[i] = p_conv_data->fp_dch_channel_info[i].ul_chan_tf_size[tfi];
|
|
fpi->chan_num_tbs[i] = p_conv_data->fp_dch_channel_info[i].ul_chan_num_tbs[tfi];
|
|
} else {
|
|
fpi->chan_tf_size[i] = p_conv_data->fp_dch_channel_info[i].dl_chan_tf_size[tfi];
|
|
fpi->chan_num_tbs[i] = p_conv_data->fp_dch_channel_info[i].dl_chan_num_tbs[tfi];
|
|
}
|
|
offset++;
|
|
}
|
|
|
|
|
|
return fpi;
|
|
}
|
|
|
|
/* Updates the conversation info of a PCH stream based on information parsed in the current frame*/
|
|
static void
|
|
update_pch_coversation_info(umts_fp_conversation_info_t *p_conv_data, packet_info *pinfo, struct fp_info *p_fp_info)
|
|
{
|
|
fp_pch_channel_info_t* fp_pch_channel_info;
|
|
/* The channel type MUST be set to PCH */
|
|
DISSECTOR_ASSERT(p_conv_data);
|
|
DISSECTOR_ASSERT(p_conv_data->channel == CHANNEL_PCH);
|
|
|
|
fp_pch_channel_info = (fp_pch_channel_info_t*)p_conv_data->channel_specific_info;
|
|
if(p_fp_info->current_paging_indications && !PINFO_FD_VISITED(pinfo))
|
|
{
|
|
/* Saving the PI info for the next packet to find */
|
|
fp_pch_channel_info->last_paging_indication_info = p_fp_info->current_paging_indications;
|
|
/* Resetting this field so we don't add it again to the conversation next time the packet is parsed */
|
|
p_fp_info->current_paging_indications = NULL;
|
|
}
|
|
}
|
|
|
|
/*****************************/
|
|
/* Main dissection function. */
|
|
static int
|
|
dissect_fp_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
proto_tree *fp_tree;
|
|
proto_item *ti;
|
|
gint offset = 0;
|
|
struct fp_info *p_fp_info;
|
|
conversation_t *p_conv = NULL;
|
|
umts_fp_conversation_info_t *p_conv_data = NULL;
|
|
|
|
/* Append this protocol name rather than replace. */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "FP");
|
|
|
|
/* Create fp tree. */
|
|
ti = proto_tree_add_item(tree, proto_fp, tvb, offset, -1, ENC_NA);
|
|
fp_tree = proto_item_add_subtree(ti, ett_fp);
|
|
|
|
top_level_tree = tree;
|
|
|
|
/* Look for packet info! */
|
|
p_fp_info = (struct fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
|
|
|
|
/* Check if we have conversation info */
|
|
/* Trying to find exact match - with both RNC's address & port and Node B's address & port */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, 0);
|
|
if (p_conv) {
|
|
p_conv_data = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
}
|
|
if (!p_conv || !p_conv_data) {
|
|
/* Didn't find exact conversation match */
|
|
/* Try to find a partial match with just the source/destination included */
|
|
p_conv = (conversation_t *)find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src,
|
|
conversation_pt_to_endpoint_type(pinfo->ptype),
|
|
pinfo->destport, pinfo->srcport, NO_ADDR2);
|
|
if (p_conv) {
|
|
p_conv_data = (umts_fp_conversation_info_t *)conversation_get_proto_data(p_conv, proto_fp);
|
|
}
|
|
}
|
|
|
|
if (p_conv_data) {
|
|
/*Figure out the direction of the link*/
|
|
if (addresses_equal(&(pinfo->net_dst), (&p_conv_data->crnc_address))) {
|
|
/* Node B -> CRNC*/
|
|
pinfo->link_dir=P2P_DIR_UL;
|
|
|
|
proto_item *item= proto_tree_add_uint(fp_tree, hf_fp_ul_setup_frame,
|
|
tvb, 0, 0, p_conv_data->ul_frame_number);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
else {
|
|
/* CRNC -> Node B */
|
|
pinfo->link_dir=P2P_DIR_DL;
|
|
|
|
/* Maybe the frame number should be stored in the proper location already in nbap?, in ul_frame_number*/
|
|
proto_item *item= proto_tree_add_uint(fp_tree, hf_fp_dl_setup_frame,
|
|
tvb, 0, 0, p_conv_data->ul_frame_number);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
if (p_fp_info == NULL) {
|
|
p_fp_info = fp_set_per_packet_inf_from_conv(p_conv, p_conv_data, tvb, pinfo, fp_tree);
|
|
}
|
|
}
|
|
|
|
if (pinfo->p2p_dir == P2P_DIR_UNKNOWN) {
|
|
if (pinfo->link_dir == P2P_DIR_UL) {
|
|
pinfo->p2p_dir = P2P_DIR_RECV;
|
|
} else {
|
|
pinfo->p2p_dir = P2P_DIR_SENT;
|
|
}
|
|
}
|
|
|
|
/* Can't dissect anything without it... */
|
|
if (p_fp_info == NULL) {
|
|
proto_tree_add_expert(fp_tree, pinfo, &ei_fp_no_per_frame_info, tvb, offset, -1);
|
|
return 1;
|
|
}
|
|
|
|
/* Show release information */
|
|
if (preferences_show_release_info) {
|
|
proto_item *release_ti;
|
|
proto_tree *release_tree;
|
|
proto_item *temp_ti;
|
|
|
|
release_ti = proto_tree_add_item(fp_tree, hf_fp_release, tvb, 0, 0, ENC_NA);
|
|
PROTO_ITEM_SET_GENERATED(release_ti);
|
|
proto_item_append_text(release_ti, " R%u (%d/%d)",
|
|
p_fp_info->release, p_fp_info->release_year, p_fp_info->release_month);
|
|
release_tree = proto_item_add_subtree(release_ti, ett_fp_release);
|
|
|
|
temp_ti = proto_tree_add_uint(release_tree, hf_fp_release_version, tvb, 0, 0, p_fp_info->release);
|
|
PROTO_ITEM_SET_GENERATED(temp_ti);
|
|
|
|
temp_ti = proto_tree_add_uint(release_tree, hf_fp_release_year, tvb, 0, 0, p_fp_info->release_year);
|
|
PROTO_ITEM_SET_GENERATED(temp_ti);
|
|
|
|
temp_ti = proto_tree_add_uint(release_tree, hf_fp_release_month, tvb, 0, 0, p_fp_info->release_month);
|
|
PROTO_ITEM_SET_GENERATED(temp_ti);
|
|
}
|
|
|
|
/* Show channel type in info column, tree */
|
|
col_set_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str_const(p_fp_info->channel,
|
|
channel_type_vals,
|
|
"Unknown channel type"));
|
|
if (p_conv_data) {
|
|
int i;
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "(%u", p_conv_data->dch_ids_in_flow_list[0]);
|
|
for (i=1; i < p_conv_data->num_dch_in_flow; i++) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ",%u", p_conv_data->dch_ids_in_flow_list[i]);
|
|
}
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ") ");
|
|
}
|
|
proto_item_append_text(ti, " (%s)",
|
|
val_to_str_const(p_fp_info->channel,
|
|
channel_type_vals,
|
|
"Unknown channel type"));
|
|
|
|
/* Add channel type as a generated field */
|
|
ti = proto_tree_add_uint(fp_tree, hf_fp_channel_type, tvb, 0, 0, p_fp_info->channel);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* Add division type as a generated field */
|
|
if (p_fp_info->release == 7) {
|
|
ti = proto_tree_add_uint(fp_tree, hf_fp_division, tvb, 0, 0, p_fp_info->division);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
|
|
/* Add link direction as a generated field */
|
|
ti = proto_tree_add_uint(fp_tree, hf_fp_direction, tvb, 0, 0, p_fp_info->is_uplink);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* Don't currently handle IuR-specific formats, but it's useful to even see
|
|
the channel type and direction */
|
|
if (p_fp_info->iface_type == IuR_Interface) {
|
|
return 1;
|
|
}
|
|
|
|
/* Show DDI config info */
|
|
if (p_fp_info->no_ddi_entries > 0) {
|
|
int n;
|
|
proto_item *ddi_config_ti;
|
|
proto_tree *ddi_config_tree;
|
|
|
|
ddi_config_ti = proto_tree_add_string_format(fp_tree, hf_fp_ddi_config, tvb, offset, 0,
|
|
"", "DDI Config (");
|
|
PROTO_ITEM_SET_GENERATED(ddi_config_ti);
|
|
ddi_config_tree = proto_item_add_subtree(ddi_config_ti, ett_fp_ddi_config);
|
|
|
|
/* Add each entry */
|
|
for (n=0; n < p_fp_info->no_ddi_entries; n++) {
|
|
proto_item_append_text(ddi_config_ti, "%s%u->%ubits",
|
|
(n == 0) ? "" : " ",
|
|
p_fp_info->edch_ddi[n], p_fp_info->edch_macd_pdu_size[n]);
|
|
ti = proto_tree_add_uint(ddi_config_tree, hf_fp_ddi_config_ddi, tvb, 0, 0,
|
|
p_fp_info->edch_ddi[n]);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
ti = proto_tree_add_uint(ddi_config_tree, hf_fp_ddi_config_macd_pdu_size, tvb, 0, 0,
|
|
p_fp_info->edch_macd_pdu_size[n]);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
}
|
|
proto_item_append_text(ddi_config_ti, ")");
|
|
}
|
|
|
|
/*************************************/
|
|
/* Dissect according to channel type */
|
|
switch (p_fp_info->channel) {
|
|
case CHANNEL_RACH_TDD:
|
|
case CHANNEL_RACH_TDD_128:
|
|
case CHANNEL_RACH_FDD:
|
|
dissect_rach_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info,
|
|
data);
|
|
break;
|
|
case CHANNEL_DCH:
|
|
dissect_dch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info,
|
|
data);
|
|
break;
|
|
case CHANNEL_FACH_FDD:
|
|
case CHANNEL_FACH_TDD:
|
|
dissect_fach_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info,
|
|
data);
|
|
break;
|
|
case CHANNEL_DSCH_FDD:
|
|
case CHANNEL_DSCH_TDD:
|
|
dissect_dsch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info);
|
|
break;
|
|
case CHANNEL_USCH_TDD_128:
|
|
case CHANNEL_USCH_TDD_384:
|
|
dissect_usch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info);
|
|
break;
|
|
case CHANNEL_PCH:
|
|
dissect_pch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info,
|
|
data);
|
|
update_pch_coversation_info(p_conv_data, pinfo, p_fp_info);
|
|
break;
|
|
case CHANNEL_CPCH:
|
|
dissect_cpch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info);
|
|
break;
|
|
case CHANNEL_BCH:
|
|
dissect_bch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info);
|
|
break;
|
|
case CHANNEL_HSDSCH:
|
|
/* Show configured MAC HS-DSCH entity in use */
|
|
if (fp_tree)
|
|
{
|
|
proto_item *entity_ti;
|
|
entity_ti = proto_tree_add_uint(fp_tree, hf_fp_hsdsch_entity,
|
|
tvb, 0, 0,
|
|
p_fp_info->hsdsch_entity);
|
|
PROTO_ITEM_SET_GENERATED(entity_ti);
|
|
}
|
|
switch (p_fp_info->hsdsch_entity) {
|
|
case entity_not_specified:
|
|
case hs:
|
|
/* This is the pre-R7 default */
|
|
dissect_hsdsch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info, data);
|
|
break;
|
|
case ehs:
|
|
dissect_hsdsch_type_2_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info, data);
|
|
break;
|
|
default:
|
|
/* Report Error */
|
|
expert_add_info(pinfo, NULL, &ei_fp_hsdsch_entity_not_specified);
|
|
break;
|
|
}
|
|
break;
|
|
case CHANNEL_HSDSCH_COMMON:
|
|
expert_add_info(pinfo, NULL, &ei_fp_hsdsch_common_experimental_support);
|
|
/*if (FALSE)*/
|
|
dissect_hsdsch_common_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info, data);
|
|
|
|
break;
|
|
case CHANNEL_HSDSCH_COMMON_T3:
|
|
expert_add_info(pinfo, NULL, &ei_fp_hsdsch_common_t3_not_implemented);
|
|
|
|
/* TODO: */
|
|
break;
|
|
case CHANNEL_IUR_CPCHF:
|
|
/* TODO: */
|
|
break;
|
|
case CHANNEL_IUR_FACH:
|
|
/* TODO: */
|
|
break;
|
|
case CHANNEL_IUR_DSCH:
|
|
dissect_iur_dsch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info);
|
|
break;
|
|
case CHANNEL_EDCH:
|
|
case CHANNEL_EDCH_COMMON:
|
|
dissect_e_dch_channel_info(tvb, pinfo, fp_tree, offset, p_fp_info,
|
|
p_fp_info->channel == CHANNEL_EDCH_COMMON,
|
|
data);
|
|
break;
|
|
|
|
default:
|
|
expert_add_info(pinfo, NULL, &ei_fp_channel_type_unknown);
|
|
break;
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static int
|
|
dissect_fp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
return dissect_fp_common(tvb, pinfo, tree, NULL);
|
|
}
|
|
|
|
static int
|
|
dissect_fp_aal2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
return dissect_fp_common(tvb, pinfo, tree, data);
|
|
}
|
|
|
|
void proto_register_fp(void)
|
|
{
|
|
static hf_register_info hf[] =
|
|
{
|
|
{ &hf_fp_release,
|
|
{ "Release",
|
|
"fp.release", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"Release information", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_release_version,
|
|
{ "Release Version",
|
|
"fp.release.version", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"3GPP Release number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_release_year,
|
|
{ "Release year",
|
|
"fp.release.year", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_release_month,
|
|
{ "Release month",
|
|
"fp.release.month", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_channel_type,
|
|
{ "Channel Type",
|
|
"fp.channel-type", FT_UINT8, BASE_HEX, VALS(channel_type_vals), 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_division,
|
|
{ "Division",
|
|
"fp.division", FT_UINT8, BASE_HEX, VALS(division_vals), 0x0,
|
|
"Radio division type", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_direction,
|
|
{ "Direction",
|
|
"fp.direction", FT_UINT8, BASE_HEX, VALS(direction_vals), 0x0,
|
|
"Link direction", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ddi_config,
|
|
{ "DDI Config",
|
|
"fp.ddi-config", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"DDI Config (for E-DCH)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ddi_config_ddi,
|
|
{ "DDI",
|
|
"fp.ddi-config.ddi", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ddi_config_macd_pdu_size,
|
|
{ "MACd PDU Size",
|
|
"fp.ddi-config.macd-pdu-size", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
|
|
|
|
{ &hf_fp_header_crc,
|
|
{ "Header CRC",
|
|
"fp.header-crc", FT_UINT8, BASE_HEX, NULL, 0xfe,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ft,
|
|
{ "Frame Type",
|
|
"fp.ft", FT_UINT8, BASE_HEX, VALS(data_control_vals), 0x01,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_cfn,
|
|
{ "CFN",
|
|
"fp.cfn", FT_UINT8, BASE_DEC, NULL, 0xff,
|
|
"Connection Frame Number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pch_cfn,
|
|
{ "CFN (PCH)",
|
|
"fp.pch.cfn", FT_UINT16, BASE_DEC, NULL, 0xfff0,
|
|
"PCH Connection Frame Number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pch_toa,
|
|
{ "ToA (PCH)",
|
|
"fp.pch.toa", FT_INT24, BASE_DEC, NULL, 0x0,
|
|
"PCH Time of Arrival", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_cfn_control,
|
|
{ "CFN control",
|
|
"fp.cfn-control", FT_UINT8, BASE_DEC, NULL, 0xff,
|
|
"Connection Frame Number Control", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_toa,
|
|
{ "ToA",
|
|
"fp.toa", FT_INT16, BASE_DEC, NULL, 0x0,
|
|
"Time of arrival (units are 125 microseconds)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_tb,
|
|
{ "TB",
|
|
"fp.tb", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"Transport Block", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_chan_zero_tbs,
|
|
{ "No TBs for channel",
|
|
"fp.channel-with-zero-tbs", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Channel with 0 TBs", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_tfi,
|
|
{ "TFI",
|
|
"fp.tfi", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Transport Format Indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_usch_tfi,
|
|
{ "TFI",
|
|
"fp.usch.tfi", FT_UINT8, BASE_DEC, NULL, 0x1f,
|
|
"USCH Transport Format Indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_cpch_tfi,
|
|
{ "TFI",
|
|
"fp.cpch.tfi", FT_UINT8, BASE_DEC, NULL, 0x1f,
|
|
"CPCH Transport Format Indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_propagation_delay,
|
|
{ "Propagation Delay",
|
|
"fp.propagation-delay", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_dch_control_frame_type,
|
|
{ "Control Frame Type",
|
|
"fp.dch.control.frame-type", FT_UINT8, BASE_HEX, VALS(dch_control_frame_type_vals), 0x0,
|
|
"DCH Control Frame Type", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_dch_rx_timing_deviation,
|
|
{ "Rx Timing Deviation",
|
|
"fp.dch.control.rx-timing-deviation", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"DCH Rx Timing Deviation", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_quality_estimate,
|
|
{ "Quality Estimate",
|
|
"fp.dch.quality-estimate", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_payload_crc,
|
|
{ "Payload CRC",
|
|
"fp.payload-crc", FT_UINT16, BASE_HEX, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_common_control_frame_type,
|
|
{ "Control Frame Type",
|
|
"fp.common.control.frame-type", FT_UINT8, BASE_HEX, VALS(common_control_frame_type_vals), 0x0,
|
|
"Common Control Frame Type", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[0],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x80,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[1],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x40,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[2],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x20,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[3],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x10,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[4],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x08,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[5],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x04,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[6],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x02,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crci[7],
|
|
{ "CRCI",
|
|
"fp.crci", FT_UINT8, BASE_HEX, VALS(crci_vals), 0x01,
|
|
"CRC correctness indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_received_sync_ul_timing_deviation,
|
|
{ "Received SYNC UL Timing Deviation",
|
|
"fp.rx-sync-ul-timing-deviation", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pch_pi,
|
|
{ "Paging Indication",
|
|
"fp.pch.pi", FT_UINT8, BASE_DEC, VALS(paging_indication_vals), 0x01,
|
|
"Indicates if the PI Bitmap is present", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pch_tfi,
|
|
{ "TFI",
|
|
"fp.pch.tfi", FT_UINT8, BASE_DEC, 0, 0x1f,
|
|
"PCH Transport Format Indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_fach_tfi,
|
|
{ "TFI",
|
|
"fp.fach.tfi", FT_UINT8, BASE_DEC, 0, 0x1f,
|
|
"FACH Transport Format Indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_transmit_power_level,
|
|
{ "Transmit Power Level",
|
|
"fp.transmit-power-level", FT_FLOAT, BASE_NONE, 0, 0x0,
|
|
"Transmit Power Level (dB)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pdsch_set_id,
|
|
{ "PDSCH Set Id",
|
|
"fp.pdsch-set-id", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"A pointer to the PDSCH Set which shall be used to transmit", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_paging_indication_bitmap,
|
|
{ "Paging Indications bitmap",
|
|
"fp.pch.pi-bitmap", FT_BYTES , BASE_NONE, NULL, 0x0,
|
|
"Paging Indication bitmap", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_relevant_paging_indication_bitmap,
|
|
{ "Relevant Paging Indications bitmap",
|
|
"fp.pch.relevant-pi-bitmap", FT_BYTES , BASE_NONE, NULL, 0x0,
|
|
"The Paging Indication bitmap used to inform users about the current frame", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rx_timing_deviation,
|
|
{ "Rx Timing Deviation",
|
|
"fp.common.control.rx-timing-deviation", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"Common Rx Timing Deviation", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_dch_e_rucch_flag,
|
|
{ "E-RUCCH Flag",
|
|
"fp.common.control.e-rucch-flag", FT_UINT8, BASE_DEC, VALS(e_rucch_flag_vals), 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_header_crc,
|
|
{ "E-DCH Header CRC",
|
|
"fp.edch.header-crc", FT_UINT16, BASE_HEX, 0, 0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_fsn,
|
|
{ "FSN",
|
|
"fp.edch.fsn", FT_UINT8, BASE_DEC, 0, 0x0f,
|
|
"E-DCH Frame Sequence Number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_number_of_subframes,
|
|
{ "No of subframes",
|
|
"fp.edch.no-of-subframes", FT_UINT8, BASE_DEC, 0, 0x0f,
|
|
"E-DCH Number of subframes", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_harq_retransmissions,
|
|
{ "No of HARQ Retransmissions",
|
|
"fp.edch.no-of-harq-retransmissions", FT_UINT8, BASE_DEC, 0, 0x78,
|
|
"E-DCH Number of HARQ retransmissions", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_subframe_number,
|
|
{ "Subframe number",
|
|
"fp.edch.subframe-number", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"E-DCH Subframe number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_number_of_mac_es_pdus,
|
|
{ "Number of Mac-es PDUs",
|
|
"fp.edch.number-of-mac-es-pdus", FT_UINT8, BASE_DEC, 0, 0xf0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_ddi,
|
|
{ "DDI",
|
|
"fp.edch.ddi", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"E-DCH Data Description Indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_subframe,
|
|
{ "Subframe",
|
|
"fp.edch.subframe", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"EDCH Subframe", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_subframe_header,
|
|
{ "Subframe header",
|
|
"fp.edch.subframe-header", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"EDCH Subframe header", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_number_of_mac_d_pdus,
|
|
{ "Number of Mac-d PDUs",
|
|
"fp.edch.number-of-mac-d-pdus", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_pdu_padding,
|
|
{ "Padding",
|
|
"fp.edch-data-padding", FT_UINT8, BASE_DEC, 0, 0xc0,
|
|
"E-DCH padding before PDU", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_tsn,
|
|
{ "TSN",
|
|
"fp.edch-tsn", FT_UINT8, BASE_DEC, 0, 0x3f,
|
|
"E-DCH Transmission Sequence Number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_mac_es_pdu,
|
|
{ "MAC-es PDU",
|
|
"fp.edch.mac-es-pdu", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_fp_edch_user_buffer_size,
|
|
{ "User Buffer Size",
|
|
"fp.edch.user-buffer-size", FT_UINT24, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_no_macid_sdus,
|
|
{ "No of MAC-is SDUs",
|
|
"fp.edch.no-macis-sdus", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_number_of_mac_is_pdus,
|
|
{ "Number of Mac-is PDUs",
|
|
"fp.edch.number-of-mac-is-pdus", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_mac_is_pdu,
|
|
{ "Mac-is PDU",
|
|
"fp.edch.mac-is-pdu", FT_BYTES, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_e_rnti,
|
|
{ "E-RNTI",
|
|
"fp.edch.e-rnti", FT_UINT16, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_fp_edch_macis_descriptors,
|
|
{ "MAC-is Descriptors",
|
|
"fp.edch.mac-is.descriptors", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_macis_lchid,
|
|
{ "LCH-ID",
|
|
"fp.edch.mac-is.lchid", FT_UINT8, BASE_HEX, VALS(lchid_vals), 0xf0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_macis_length,
|
|
{ "Length",
|
|
"fp.edch.mac-is.length", FT_UINT16, BASE_DEC, 0, 0x0ffe,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_edch_macis_flag,
|
|
{ "Flag",
|
|
"fp.edch.mac-is.lchid", FT_UINT8, BASE_HEX, 0, 0x01,
|
|
"Indicates if another entry follows", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_frame_seq_nr,
|
|
{ "Frame Seq Nr",
|
|
"fp.frame-seq-nr", FT_UINT8, BASE_DEC, 0, 0xf0,
|
|
"Frame Sequence Number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_pdu_block_header,
|
|
{ "PDU block header",
|
|
"fp.hsdsch.pdu-block-header", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"HS-DSCH type 2 PDU block header", HFILL
|
|
}
|
|
},
|
|
#if 0
|
|
{ &hf_fp_hsdsch_pdu_block,
|
|
{ "PDU block",
|
|
"fp.hsdsch.pdu-block", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"HS-DSCH type 2 PDU block data", HFILL
|
|
}
|
|
},
|
|
#endif
|
|
{ &hf_fp_flush,
|
|
{ "Flush",
|
|
"fp.flush", FT_UINT8, BASE_DEC, 0, 0x04,
|
|
"Whether all PDUs for this priority queue should be removed", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_fsn_drt_reset,
|
|
{ "FSN-DRT reset",
|
|
"fp.fsn-drt-reset", FT_UINT8, BASE_DEC, 0, 0x02,
|
|
"FSN/DRT Reset Flag", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_drt_indicator,
|
|
{ "DRT Indicator",
|
|
"fp.drt-indicator", FT_UINT8, BASE_DEC, 0, 0x01,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_fach_indicator,
|
|
{ "FACH Indicator",
|
|
"fp.fach-indicator", FT_UINT8, BASE_DEC, 0, 0x80,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_total_pdu_blocks,
|
|
{ "PDU Blocks",
|
|
"fp.pdu_blocks", FT_UINT8, BASE_DEC, 0, 0xf8,
|
|
"Total number of PDU blocks", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_drt,
|
|
{ "DelayRefTime",
|
|
"fp.drt", FT_UINT16, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hrnti,
|
|
{ "HRNTI",
|
|
"fp.hrnti", FT_UINT16, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_measurement_result,
|
|
{ "RACH Measurement Result",
|
|
"fp.rach-measurement-result", FT_UINT16, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_lchid,
|
|
{ "Logical Channel ID",
|
|
"fp.lchid", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pdu_length_in_block,
|
|
{ "PDU length in block",
|
|
"fp.pdu-length-in-block", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"Length of each PDU in this block in bytes", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pdus_in_block,
|
|
{ "PDUs in block",
|
|
"fp.no-pdus-in-block", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"Number of PDUs in block", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_cmch_pi,
|
|
{ "CmCH-PI",
|
|
"fp.cmch-pi", FT_UINT8, BASE_DEC, 0, 0x0f,
|
|
"Common Transport Channel Priority Indicator", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_user_buffer_size,
|
|
{ "User buffer size",
|
|
"fp.user-buffer-size", FT_UINT16, BASE_DEC, 0, 0x0,
|
|
"User buffer size in octets", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_credits,
|
|
{ "HS-DSCH Credits",
|
|
"fp.hsdsch-credits", FT_UINT16, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_max_macd_pdu_len,
|
|
{ "Max MAC-d PDU Length",
|
|
"fp.hsdsch.max-macd-pdu-len", FT_UINT16, BASE_DEC, 0, 0xfff8,
|
|
"Maximum MAC-d PDU Length in bits", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_max_macdc_pdu_len,
|
|
{ "Max MAC-d/c PDU Length",
|
|
"fp.hsdsch.max-macdc-pdu-len", FT_UINT16, BASE_DEC, 0, 0x07ff,
|
|
"Maximum MAC-d/c PDU Length in bits", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_interval,
|
|
{ "HS-DSCH Interval in milliseconds",
|
|
"fp.hsdsch-interval", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_calculated_rate,
|
|
{ "Calculated rate allocation (bps)",
|
|
"fp.hsdsch-calculated-rate", FT_UINT32, BASE_DEC, 0, 0x0,
|
|
"Calculated rate RNC is allowed to send in bps", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_unlimited_rate,
|
|
{ "Unlimited rate",
|
|
"fp.hsdsch-unlimited-rate", FT_NONE, BASE_NONE, 0, 0x0,
|
|
"No restriction on rate at which date may be sent", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_repetition_period,
|
|
{ "HS-DSCH Repetition Period",
|
|
"fp.hsdsch-repetition-period", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"HS-DSCH Repetition Period in milliseconds", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_data_padding,
|
|
{ "Padding",
|
|
"fp.hsdsch-data-padding", FT_UINT8, BASE_DEC, 0, 0xf0,
|
|
"HS-DSCH Repetition Period in milliseconds", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flags,
|
|
{ "New IEs flags",
|
|
"fp.hsdsch.new-ie-flags", FT_STRING, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[0],
|
|
{ "DRT IE present",
|
|
"fp.hsdsch.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x80,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[1],
|
|
{ "New IE present",
|
|
"fp.hsdsch.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x40,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[2],
|
|
{ "New IE present",
|
|
"fp.hsdsch.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x20,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[3],
|
|
{ "New IE present",
|
|
"fp.hsdsch.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x10,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[4],
|
|
{ "New IE present",
|
|
"fp.hsdsch.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x08,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[5],
|
|
{ "New IE present",
|
|
"fp.hsdsch.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x04,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[6],
|
|
{ "HS-DSCH physical layer category present",
|
|
"fp.hsdsch.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x02,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_new_ie_flag[7],
|
|
{ "Another new IE flags byte",
|
|
"fp.hsdsch.new-ie-flags-byte", FT_UINT8, BASE_DEC, 0, 0x01,
|
|
"Another new IE flagsbyte", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_drt,
|
|
{ "DRT",
|
|
"fp.hsdsch.drt", FT_UINT8, BASE_DEC, 0, 0xf0,
|
|
"Delay Reference Time", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_entity,
|
|
{ "HS-DSCH Entity",
|
|
"fp.hsdsch.entity", FT_UINT8, BASE_DEC, VALS(hsdshc_mac_entity_vals), 0x0,
|
|
"Type of MAC entity for this HS-DSCH channel", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_timing_advance,
|
|
{ "Timing advance",
|
|
"fp.timing-advance", FT_UINT8, BASE_DEC, 0, 0x3f,
|
|
"Timing advance in chips", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_num_of_pdu,
|
|
{ "Number of PDUs",
|
|
"fp.hsdsch.num-of-pdu", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
"Number of PDUs in the payload", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_mac_d_pdu_len,
|
|
{ "MAC-d PDU Length",
|
|
"fp.hsdsch.mac-d-pdu-len", FT_UINT16, BASE_DEC, 0, 0xfff8,
|
|
"MAC-d PDU Length in bits", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_mac_d_pdu,
|
|
{ "MAC-d PDU",
|
|
"fp.mac-d-pdu", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_data,
|
|
{ "Data",
|
|
"fp.data", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_crcis,
|
|
{ "CRCIs",
|
|
"fp.crcis", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"CRC Indicators for uplink TBs", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_t1,
|
|
{ "T1",
|
|
"fp.t1", FT_FLOAT, BASE_NONE, NULL, 0x0,
|
|
"RNC frame number indicating time it sends frame", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_t2,
|
|
{ "T2",
|
|
"fp.t2", FT_FLOAT, BASE_NONE, NULL, 0x0,
|
|
"NodeB frame number indicating time it received DL Sync", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_t3,
|
|
{ "T3",
|
|
"fp.t3", FT_FLOAT, BASE_NONE, NULL, 0x0,
|
|
"NodeB frame number indicating time it sends frame", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ul_sir_target,
|
|
{ "UL_SIR_TARGET",
|
|
"fp.ul-sir-target", FT_FLOAT, BASE_NONE, 0, 0x0,
|
|
"Value (in dB) of the SIR target to be used by the UL inner loop power control", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_pusch_set_id,
|
|
{ "PUSCH Set Id",
|
|
"fp.pusch-set-id", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Identifies PUSCH Set from those configured in NodeB", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_activation_cfn,
|
|
{ "Activation CFN",
|
|
"fp.activation-cfn", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Activation Connection Frame Number", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_duration,
|
|
{ "Duration (ms)",
|
|
"fp.pusch-set-id", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Duration of the activation period of the PUSCH Set", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_power_offset,
|
|
{ "Power offset",
|
|
"fp.power-offset", FT_FLOAT, BASE_NONE, NULL, 0x0,
|
|
"Power offset (in dB)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_code_number,
|
|
{ "Code number",
|
|
"fp.code-number", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_spreading_factor,
|
|
{ "Spreading factor",
|
|
"fp.spreading-factor", FT_UINT8, BASE_DEC, VALS(spreading_factor_vals), 0xf0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_mc_info,
|
|
{ "MC info",
|
|
"fp.mc-info", FT_UINT8, BASE_DEC, NULL, 0x0e,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flags,
|
|
{ "New IEs flags",
|
|
"fp.rach.new-ie-flags", FT_STRING, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flag_unused[0],
|
|
{ "New IE present",
|
|
"fp.rach.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x80,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flag_unused[1],
|
|
{ "New IE present",
|
|
"fp.rach.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x40,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flag_unused[2],
|
|
{ "New IE present",
|
|
"fp.rach.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x20,
|
|
"New IE present (unused)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flag_unused[3],
|
|
{ "New IE present",
|
|
"fp.rach.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x10,
|
|
"New IE present (unused)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flag_unused[4],
|
|
{ "New IE present",
|
|
"fp.rach.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x08,
|
|
"New IE present (unused)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flag_unused[5],
|
|
{ "New IE present",
|
|
"fp.rach.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x04,
|
|
"New IE present (unused)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_new_ie_flag_unused[6],
|
|
{ "New IE present",
|
|
"fp.rach.new-ie-flag", FT_UINT8, BASE_DEC, 0, 0x02,
|
|
"New IE present (unused)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_cell_portion_id_present,
|
|
{ "Cell portion ID present",
|
|
"fp.rach.cell-portion-id-present", FT_UINT8, BASE_DEC, 0, 0x01,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_angle_of_arrival_present,
|
|
{ "Angle of arrival present",
|
|
"fp.rach.angle-of-arrival-present", FT_UINT8, BASE_DEC, 0, 0x01,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_ext_propagation_delay_present,
|
|
{ "Ext Propagation Delay Present",
|
|
"fp.rach.ext-propagation-delay-present", FT_UINT8, BASE_DEC, 0, 0x02,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_ext_rx_sync_ul_timing_deviation_present,
|
|
{ "Ext Received Sync UL Timing Deviation present",
|
|
"fp.rach.ext-rx-sync-ul-timing-deviation-present", FT_UINT8, BASE_DEC, 0, 0x02,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_rach_ext_rx_timing_deviation_present,
|
|
{ "Ext Rx Timing Deviation present",
|
|
"fp.rach.ext-rx-timing-deviation-present", FT_UINT8, BASE_DEC, 0, 0x01,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_cell_portion_id,
|
|
{ "Cell Portion ID",
|
|
"fp.cell-portion-id", FT_UINT8, BASE_DEC, NULL, 0x3f,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ext_propagation_delay,
|
|
{ "Ext Propagation Delay",
|
|
"fp.ext-propagation-delay", FT_UINT16, BASE_DEC, NULL, 0x03ff,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_angle_of_arrival,
|
|
{ "Angle of Arrival",
|
|
"fp.angle-of-arrival", FT_UINT16, BASE_DEC, NULL, 0x03ff,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ext_received_sync_ul_timing_deviation,
|
|
{ "Ext Received SYNC UL Timing Deviation",
|
|
"fp.ext-received-sync-ul-timing-deviation", FT_UINT16, BASE_DEC, NULL, 0x1fff,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
|
|
|
|
{ &hf_fp_radio_interface_parameter_update_flag[0],
|
|
{ "CFN valid",
|
|
"fp.radio-interface-param.cfn-valid", FT_UINT16, BASE_DEC, 0, 0x0001,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_radio_interface_parameter_update_flag[1],
|
|
{ "TPC PO valid",
|
|
"fp.radio-interface-param.tpc-po-valid", FT_UINT16, BASE_DEC, 0, 0x0002,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_radio_interface_parameter_update_flag[2],
|
|
{ "DPC mode valid",
|
|
"fp.radio-interface-param.dpc-mode-valid", FT_UINT16, BASE_DEC, 0, 0x0004,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_radio_interface_parameter_update_flag[3],
|
|
{ "RL sets indicator valid",
|
|
"fp.radio-interface_param.rl-sets-indicator-valid", FT_UINT16, BASE_DEC, 0, 0x0020,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_radio_interface_parameter_update_flag[4],
|
|
{ "Maximum UE TX Power valid",
|
|
"fp.radio-interface-param.max-ue-tx-pow-valid", FT_UINT16, BASE_DEC, 0, 0x0040,
|
|
"MAX UE TX POW valid", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_dpc_mode,
|
|
{ "DPC Mode",
|
|
"fp.dpc-mode", FT_UINT8, BASE_DEC, NULL, 0x20,
|
|
"DPC Mode to be applied in the uplink", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_tpc_po,
|
|
{ "TPC Power Offset",
|
|
"fp.tpc-po", FT_UINT8, BASE_DEC, NULL, 0x1f,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_multiple_rl_set_indicator,
|
|
{ "Multiple RL sets indicator",
|
|
"fp.multiple-rl-sets-indicator", FT_UINT8, BASE_DEC, NULL, 0x80,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_max_ue_tx_pow,
|
|
{ "Maximum UE TX Power",
|
|
"fp.max-ue-tx-pow", FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"Max UE TX POW (dBm)", HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_congestion_status,
|
|
{ "Congestion Status",
|
|
"fp.congestion-status", FT_UINT8, BASE_DEC, VALS(congestion_status_vals), 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_e_rucch_present,
|
|
{ "E-RUCCH Present",
|
|
"fp.erucch-present", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_extended_bits_present,
|
|
{ "Extended Bits Present",
|
|
"fp.extended-bits-present", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_extended_bits,
|
|
{ "Extended Bits",
|
|
"fp.extended-bits", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_spare_extension,
|
|
{ "Spare Extension",
|
|
"fp.spare-extension", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_ul_setup_frame,
|
|
{ "UL setup frame",
|
|
"fp.ul.setup_frame", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_dl_setup_frame,
|
|
{ "DL setup frame",
|
|
"fp.dl.setup_frame", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_relevant_pi_frame,
|
|
{ "Paging Indications frame number",
|
|
"fp.pch.relevant-pi-frame", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"The frame where this Paging Indication bitmap was found",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_fp_hsdsch_physical_layer_category,
|
|
{ "HS-DSCH physical layer category",
|
|
"fp.hsdsch.physical_layer_category", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
static gint *ett[] =
|
|
{
|
|
&ett_fp,
|
|
&ett_fp_data,
|
|
&ett_fp_crcis,
|
|
&ett_fp_ddi_config,
|
|
&ett_fp_edch_subframe_header,
|
|
&ett_fp_edch_subframe,
|
|
&ett_fp_edch_maces,
|
|
&ett_fp_edch_macis_descriptors,
|
|
&ett_fp_hsdsch_new_ie_flags,
|
|
&ett_fp_rach_new_ie_flags,
|
|
&ett_fp_hsdsch_pdu_block_header,
|
|
&ett_fp_pch_relevant_pi,
|
|
&ett_fp_release
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_fp_bad_header_checksum, { "fp.header.bad_checksum", PI_CHECKSUM, PI_WARN, "Bad header checksum.", EXPFILL }},
|
|
{ &ei_fp_crci_no_subdissector, { "fp.crci.no_subdissector", PI_UNDECODED, PI_NOTE, "Not sent to subdissectors as CRCI is set", EXPFILL }},
|
|
{ &ei_fp_crci_error_bit_set_for_tb, { "fp.crci.error_bit_set_for_tb", PI_CHECKSUM, PI_WARN, "CRCI error bit set for TB", EXPFILL }},
|
|
{ &ei_fp_spare_extension, { "fp.spare-extension.expert", PI_UNDECODED, PI_WARN, "Spare Extension present (%u bytes)", EXPFILL }},
|
|
{ &ei_fp_bad_payload_checksum, { "fp.payload-crc.bad", PI_CHECKSUM, PI_WARN, "Bad payload checksum.", EXPFILL }},
|
|
{ &ei_fp_stop_hsdpa_transmission, { "fp.stop_hsdpa_transmission", PI_RESPONSE_CODE, PI_NOTE, "Stop HSDPA transmission", EXPFILL }},
|
|
{ &ei_fp_timing_adjustmentment_reported, { "fp.timing_adjustmentment_reported", PI_SEQUENCE, PI_WARN, "Timing adjustmentment reported (%f ms)", EXPFILL }},
|
|
{ &ei_fp_expecting_tdd, { "fp.expecting_tdd", PI_MALFORMED, PI_NOTE, "Error: expecting TDD-384 or TDD-768", EXPFILL }},
|
|
{ &ei_fp_ddi_not_defined, { "fp.ddi_not_defined", PI_MALFORMED, PI_ERROR, "DDI %u not defined for this UE!", EXPFILL }},
|
|
{ &ei_fp_unable_to_locate_ddi_entry, { "fp.unable_to_locate_ddi_entry", PI_UNDECODED, PI_ERROR, "Unable to locate DDI entry.", EXPFILL }},
|
|
{ &ei_fp_mac_is_sdus_miscount, { "fp.mac_is_sdus.miscount", PI_MALFORMED, PI_ERROR, "Found too many (%u) MAC-is SDUs - header said there were %u", EXPFILL }},
|
|
{ &ei_fp_e_rnti_t2_edch_frames, { "fp.e_rnti.t2_edch_frames", PI_MALFORMED, PI_ERROR, "E-RNTI not supposed to appear for T2 EDCH frames", EXPFILL }},
|
|
{ &ei_fp_e_rnti_first_entry, { "fp.e_rnti.first_entry", PI_MALFORMED, PI_ERROR, "E-RNTI must be first entry among descriptors", EXPFILL }},
|
|
{ &ei_fp_maybe_srb, { "fp.maybe_srb", PI_PROTOCOL, PI_NOTE, "Found MACd-Flow = 0 and not MUX detected. (This might be SRB)", EXPFILL }},
|
|
{ &ei_fp_transport_channel_type_unknown, { "fp.transport_channel_type.unknown", PI_UNDECODED, PI_WARN, "Unknown transport channel type", EXPFILL }},
|
|
{ &ei_fp_pch_lost_relevant_pi_frame, { "fp.pch_lost_relevant_pi_frame", PI_SEQUENCE, PI_WARN, "Previous PCH frame containing PI bitmap not captured (common at capture start)", EXPFILL }},
|
|
{ &ei_fp_hsdsch_entity_not_specified, { "fp.hsdsch_entity_not_specified", PI_MALFORMED, PI_ERROR, "HSDSCH Entity not specified", EXPFILL }},
|
|
{ &ei_fp_hsdsch_common_experimental_support, { "fp.hsdsch_common.experimental_support", PI_DEBUG, PI_WARN, "HSDSCH COMMON - Experimental support!", EXPFILL }},
|
|
{ &ei_fp_hsdsch_common_t3_not_implemented, { "fp.hsdsch_common_t3.not_implemented", PI_DEBUG, PI_ERROR, "HSDSCH COMMON T3 - Not implemeneted!", EXPFILL }},
|
|
{ &ei_fp_channel_type_unknown, { "fp.channel_type.unknown", PI_MALFORMED, PI_ERROR, "Unknown channel type", EXPFILL }},
|
|
{ &ei_fp_no_per_frame_info, { "fp.no_per_frame_info", PI_UNDECODED, PI_ERROR, "Can't dissect FP frame because no per-frame info was attached!", EXPFILL }},
|
|
{ &ei_fp_no_per_conv_channel_info, { "fp.no_per_conv_channel_info", PI_UNDECODED, PI_ERROR, "Can't dissect this FP stream because no per-conversation channel info was attached!", EXPFILL }},
|
|
};
|
|
|
|
module_t *fp_module;
|
|
expert_module_t *expert_fp;
|
|
|
|
/* Register protocol. */
|
|
proto_fp = proto_register_protocol("FP", "FP", "fp");
|
|
proto_register_field_array(proto_fp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_fp = expert_register_protocol(proto_fp);
|
|
expert_register_field_array(expert_fp, ei, array_length(ei));
|
|
|
|
/* Allow other dissectors to find this one by name. */
|
|
fp_handle = register_dissector("fp", dissect_fp, proto_fp);
|
|
|
|
/* Preferences */
|
|
fp_module = prefs_register_protocol(proto_fp, NULL);
|
|
|
|
/* Determines whether release information should be displayed */
|
|
prefs_register_bool_preference(fp_module, "show_release_info",
|
|
"Show reported release info",
|
|
"Show reported release info",
|
|
&preferences_show_release_info);
|
|
|
|
/* Determines whether MAC dissector should be called for payloads */
|
|
prefs_register_bool_preference(fp_module, "call_mac",
|
|
"Call MAC dissector for payloads",
|
|
"Call MAC dissector for payloads",
|
|
&preferences_call_mac_dissectors);
|
|
/* Determines whether or not to validate FP payload checksums */
|
|
prefs_register_bool_preference(fp_module, "payload_checksum",
|
|
"Validate FP payload checksums",
|
|
"Validate FP payload checksums",
|
|
&preferences_payload_checksum);
|
|
/* Determines whether or not to validate FP header checksums */
|
|
prefs_register_bool_preference(fp_module, "header_checksum",
|
|
"Validate FP header checksums",
|
|
"Validate FP header checksums",
|
|
&preferences_header_checksum);
|
|
/* Determines whether or not to track Paging Indications between PCH frames*/
|
|
prefs_register_bool_preference(fp_module, "track_paging_indications",
|
|
"Track Paging Indications in PCH channels",
|
|
"For each PCH data frame, Try to show the paging indications bitmap found in the previous frame",
|
|
&preferences_track_paging_indications);
|
|
prefs_register_obsolete_preference(fp_module, "udp_heur");
|
|
prefs_register_obsolete_preference(fp_module, "epandchannelconfigurationtable");
|
|
|
|
}
|
|
|
|
|
|
void proto_reg_handoff_fp(void)
|
|
{
|
|
dissector_handle_t fp_aal2_handle;
|
|
|
|
rlc_bcch_handle = find_dissector_add_dependency("rlc.bcch", proto_fp);
|
|
mac_fdd_rach_handle = find_dissector_add_dependency("mac.fdd.rach", proto_fp);
|
|
mac_fdd_fach_handle = find_dissector_add_dependency("mac.fdd.fach", proto_fp);
|
|
mac_fdd_pch_handle = find_dissector_add_dependency("mac.fdd.pch", proto_fp);
|
|
mac_fdd_dch_handle = find_dissector_add_dependency("mac.fdd.dch", proto_fp);
|
|
mac_fdd_edch_handle = find_dissector_add_dependency("mac.fdd.edch", proto_fp);
|
|
mac_fdd_edch_type2_handle = find_dissector_add_dependency("mac.fdd.edch.type2", proto_fp);
|
|
mac_fdd_hsdsch_handle = find_dissector_add_dependency("mac.fdd.hsdsch", proto_fp);
|
|
|
|
heur_dissector_add("udp", heur_dissect_fp, "FP over UDP", "fp_udp", proto_fp, HEURISTIC_DISABLE);
|
|
heur_dissector_add("fp_mux", heur_dissect_fp, "FP over FP Mux", "fp_fp_mux", proto_fp, HEURISTIC_ENABLE);
|
|
|
|
fp_aal2_handle = create_dissector_handle(dissect_fp_aal2, proto_fp);
|
|
dissector_add_uint("atm.aal2.type", TRAF_UMTS_FP, fp_aal2_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|