forked from osmocom/wireshark
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Change-Id: I590ff86fd0964715ece691adbb7f475ff6662d81 Reviewed-on: https://code.wireshark.org/review/28348 Petri-Dish: Pascal Quantin <pascal.quantin@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
1729 lines
64 KiB
C
1729 lines
64 KiB
C
/* packet-pdcp-nr.c
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* Routines for nr PDCP
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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/prefs.h>
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#include <epan/expert.h>
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#include <epan/uat.h>
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#include <epan/proto_data.h>
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#include <wsutil/wsgcrypt.h>
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#include "packet-rlc-nr.h"
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#include "packet-pdcp-nr.h"
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void proto_register_pdcp_nr(void);
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void proto_reg_handoff_pdcp_nr(void);
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/* Described in:
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* 3GPP TS 38.323 Technical Specification Group Radio Access Netowrk; NR;
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* Packet Data Convergence Protocol (PDCP) specification (Release 15.1.0)
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*/
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/* TODO:
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- Deciphering, but should refactor and share LTE implementation
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*/
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/* Initialize the protocol and registered fields. */
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int proto_pdcp_nr = -1;
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extern int proto_rlc_nr;
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/* Configuration (info known outside of PDU) */
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static int hf_pdcp_nr_configuration = -1;
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static int hf_pdcp_nr_direction = -1;
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static int hf_pdcp_nr_ueid = -1;
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static int hf_pdcp_nr_bearer_type = -1;
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static int hf_pdcp_nr_bearer_id = -1;
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static int hf_pdcp_nr_plane = -1;
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static int hf_pdcp_nr_seqnum_length = -1;
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static int hf_pdcp_nr_rohc_compression = -1;
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static int hf_pdcp_nr_rohc_mode = -1;
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static int hf_pdcp_nr_rohc_rnd = -1;
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static int hf_pdcp_nr_rohc_udp_checksum_present = -1;
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static int hf_pdcp_nr_rohc_profile = -1;
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static int hf_pdcp_nr_cid_inclusion_info = -1;
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static int hf_pdcp_nr_large_cid_present = -1;
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/* PDCP header fields */
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static int hf_pdcp_nr_control_plane_reserved = -1;
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static int hf_pdcp_nr_reserved3 = -1;
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static int hf_pdcp_nr_seq_num_12 = -1;
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static int hf_pdcp_nr_reserved5 = -1;
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static int hf_pdcp_nr_seq_num_18 = -1;
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static int hf_pdcp_nr_signalling_data = -1;
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static int hf_pdcp_nr_mac = -1;
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static int hf_pdcp_nr_data_control = -1;
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static int hf_pdcp_nr_user_plane_data = -1;
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static int hf_pdcp_nr_control_pdu_type = -1;
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static int hf_pdcp_nr_fmc = -1;
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static int hf_pdcp_nr_reserved4 = -1;
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static int hf_pdcp_nr_bitmap = -1;
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static int hf_pdcp_nr_bitmap_byte = -1;
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/* Sequence Analysis */
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static int hf_pdcp_nr_sequence_analysis = -1;
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static int hf_pdcp_nr_sequence_analysis_ok = -1;
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static int hf_pdcp_nr_sequence_analysis_previous_frame = -1;
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static int hf_pdcp_nr_sequence_analysis_next_frame = -1;
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static int hf_pdcp_nr_sequence_analysis_expected_sn = -1;
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static int hf_pdcp_nr_sequence_analysis_repeated = -1;
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static int hf_pdcp_nr_sequence_analysis_skipped = -1;
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/* Protocol subtree. */
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static int ett_pdcp = -1;
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static int ett_pdcp_configuration = -1;
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static int ett_pdcp_packet = -1;
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static int ett_pdcp_nr_sequence_analysis = -1;
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static int ett_pdcp_report_bitmap = -1;
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static expert_field ei_pdcp_nr_sequence_analysis_wrong_sequence_number = EI_INIT;
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static expert_field ei_pdcp_nr_reserved_bits_not_zero = EI_INIT;
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static expert_field ei_pdcp_nr_sequence_analysis_sn_repeated = EI_INIT;
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static expert_field ei_pdcp_nr_sequence_analysis_sn_missing = EI_INIT;
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static expert_field ei_pdcp_nr_unknown_udp_framing_tag = EI_INIT;
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static expert_field ei_pdcp_nr_missing_udp_framing_tag = EI_INIT;
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static const value_string direction_vals[] =
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{
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{ PDCP_NR_DIRECTION_UPLINK, "Uplink"},
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{ PDCP_NR_DIRECTION_DOWNLINK, "Downlink"},
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{ 0, NULL }
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};
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static const value_string pdcp_plane_vals[] = {
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{ NR_SIGNALING_PLANE, "Signalling" },
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{ NR_USER_PLANE, "User" },
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{ 0, NULL }
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};
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static const value_string bearer_type_vals[] = {
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{ Bearer_DCCH, "DCCH"},
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{ Bearer_BCCH_BCH, "BCCH_BCH"},
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{ Bearer_BCCH_DL_SCH, "BCCH_DL_SCH"},
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{ Bearer_CCCH, "CCCH"},
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{ Bearer_PCCH, "PCCH"},
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{ 0, NULL}
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};
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static const value_string rohc_mode_vals[] = {
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{ UNIDIRECTIONAL, "Unidirectional" },
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{ OPTIMISTIC_BIDIRECTIONAL, "Optimistic Bidirectional" },
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{ RELIABLE_BIDIRECTIONAL, "Reliable Bidirectional" },
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{ 0, NULL }
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};
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/* Entries taken from Table 5.7.1-1.
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Descriptions from http://www.iana.org/assignments/rohc-pro-ids/rohc-pro-ids.txt */
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static const value_string rohc_profile_vals[] = {
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{ 0x0000, "ROHC uncompressed" }, /* [RFC5795] */
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{ 0x0001, "ROHC RTP" }, /* [RFC3095] */
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{ 0x0002, "ROHC UDP" }, /* [RFC3095] */
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{ 0x0003, "ROHC ESP" }, /* [RFC3095] */
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{ 0x0004, "ROHC IP" }, /* [RFC3843] */
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{ 0x0006, "ROHC TCP" }, /* [RFC4996] */
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{ 0x0101, "ROHCv2 RTP" }, /* [RFC5225] */
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{ 0x0102, "ROHCv2 UDP" }, /* [RFC5225] */
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{ 0x0103, "ROHCv2 ESP" }, /* [RFC5225] */
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{ 0x0104, "ROHCv2 IP" }, /* [RFC5225] */
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{ 0, NULL }
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};
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static const true_false_string pdu_type_bit = {
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"Data PDU",
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"Control PDU"
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};
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static const value_string control_pdu_type_vals[] = {
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{ 0, "PDCP status report" },
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{ 1, "Interspersed ROHC feedback packet" },
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{ 0, NULL }
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};
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#if 0
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static const value_string integrity_algorithm_vals[] = {
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{ 0, "NIA0" },
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{ 1, "NIA1" },
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{ 2, "NIA2" },
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{ 3, "NIA3" },
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{ 0, NULL }
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};
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static const value_string ciphering_algorithm_vals[] = {
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{ 0, "NEA0" },
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{ 1, "NEA1" },
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{ 2, "NEA2" },
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{ 3, "NEA3" },
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{ 0, NULL }
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};
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#endif
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/* SDAP header fields and tree */
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static int proto_sdap = -1;
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static int hf_sdap_rdi = -1;
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static int hf_sdap_rqi = -1;
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static int hf_sdap_qfi = -1;
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static int hf_sdap_data_control = -1;
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static int hf_sdap_reserved = -1;
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static gint ett_sdap = -1;
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static const true_false_string sdap_rdi = {
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"To store QoS flow to DRB mapping rule",
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"No action"
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};
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static const true_false_string sdap_rqi = {
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"To inform NAS that RQI bit is set to 1",
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"No action"
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};
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static dissector_handle_t ip_handle;
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static dissector_handle_t ipv6_handle;
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static dissector_handle_t rohc_handle;
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#define SEQUENCE_ANALYSIS_RLC_ONLY 1
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#define SEQUENCE_ANALYSIS_PDCP_ONLY 2
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/* Preference variables */
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static gboolean global_pdcp_dissect_user_plane_as_ip = TRUE;
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static gboolean global_pdcp_dissect_signalling_plane_as_rrc = TRUE;
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static gint global_pdcp_check_sequence_numbers = TRUE;
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static gboolean global_pdcp_dissect_rohc = FALSE;
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/* Which layer info to show in the info column */
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enum layer_to_show {
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ShowRLCLayer, ShowPDCPLayer, ShowTrafficLayer
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};
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static gint global_pdcp_nr_layer_to_show = (gint)ShowRLCLayer;
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/**************************************************/
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/* Sequence number analysis */
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/* Bearer key */
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typedef struct
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{
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/* Using bit fields to fit into 32 bits, so avoiding the need to allocate
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heap memory for these structs */
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guint ueId : 16;
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guint plane : 2;
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guint bearerId : 6;
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guint direction : 1;
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guint notUsed : 7;
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} pdcp_bearer_hash_key;
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/* Bearer state */
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typedef struct
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{
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guint32 previousSequenceNumber;
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guint32 previousFrameNum;
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guint32 hfn;
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} pdcp_bearer_status;
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/* The sequence analysis bearer hash table.
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Maps key -> status */
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static wmem_map_t *pdcp_sequence_analysis_bearer_hash = NULL;
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/* Hash table types & functions for frame reports */
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typedef struct {
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guint32 frameNumber;
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guint32 SN : 18;
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guint32 plane : 2;
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guint32 bearerId: 5;
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guint32 direction: 1;
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guint32 notUsed : 6;
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} pdcp_result_hash_key;
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static gint pdcp_result_hash_equal(gconstpointer v, gconstpointer v2)
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{
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const pdcp_result_hash_key* val1 = (const pdcp_result_hash_key *)v;
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const pdcp_result_hash_key* val2 = (const pdcp_result_hash_key *)v2;
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/* All fields must match */
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return (memcmp(val1, val2, sizeof(pdcp_result_hash_key)) == 0);
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}
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/* Compute a hash value for a given key. */
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static guint pdcp_result_hash_func(gconstpointer v)
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{
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const pdcp_result_hash_key* val1 = (const pdcp_result_hash_key *)v;
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/* TODO: This is a bit random. */
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return val1->frameNumber + (val1->bearerId<<7) +
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(val1->plane<<12) +
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(val1->SN<<14) +
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(val1->direction<<6);
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}
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/* pdcp_bearer_hash_key fits into the pointer, so just copy the value into
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a guint, cast to a pointer and return that as the key */
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static gpointer get_bearer_hash_key(pdcp_bearer_hash_key *key)
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{
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guint asInt = 0;
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/* TODO: assert that sizeof(pdcp_bearer_hash_key) <= sizeof(guint) ? */
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memcpy(&asInt, key, sizeof(pdcp_bearer_hash_key));
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return GUINT_TO_POINTER(asInt);
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}
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/* Convenience function to get a pointer for the hash_func to work with */
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static gpointer get_report_hash_key(guint32 SN, guint32 frameNumber,
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pdcp_nr_info *p_pdcp_nr_info,
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gboolean do_persist)
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{
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static pdcp_result_hash_key key;
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pdcp_result_hash_key *p_key;
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/* Only allocate a struct when will be adding entry */
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if (do_persist) {
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p_key = wmem_new(wmem_file_scope(), pdcp_result_hash_key);
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}
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else {
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memset(&key, 0, sizeof(pdcp_result_hash_key));
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p_key = &key;
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}
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/* Fill in details, and return pointer */
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p_key->frameNumber = frameNumber;
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p_key->SN = SN;
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p_key->plane = (guint8)p_pdcp_nr_info->plane;
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p_key->bearerId = p_pdcp_nr_info->bearerId;
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p_key->direction = p_pdcp_nr_info->direction;
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p_key->notUsed = 0;
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return p_key;
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}
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/* Info to attach to frame when first read, recording what to show about sequence */
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typedef enum
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{
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SN_OK, SN_Repeated, SN_MAC_Retx, SN_Retx, SN_Missing
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} sequence_state;
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typedef struct
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{
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gboolean sequenceExpectedCorrect;
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guint32 sequenceExpected;
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guint32 previousFrameNum;
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guint32 nextFrameNum;
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guint32 firstSN;
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guint32 lastSN;
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guint32 hfn;
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sequence_state state;
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} pdcp_sequence_report_in_frame;
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/* The sequence analysis frame report hash table.
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Maps pdcp_result_hash_key* -> pdcp_sequence_report_in_frame* */
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static wmem_map_t *pdcp_nr_sequence_analysis_report_hash = NULL;
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/* Add to the tree values associated with sequence analysis for this frame */
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static void addBearerSequenceInfo(pdcp_sequence_report_in_frame *p,
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pdcp_nr_info *p_pdcp_nr_info,
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guint32 sequenceNumber,
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packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb)
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{
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proto_tree *seqnum_tree;
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proto_item *seqnum_ti;
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proto_item *ti_expected_sn;
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proto_item *ti;
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/* Create subtree */
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seqnum_ti = proto_tree_add_string_format(tree,
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hf_pdcp_nr_sequence_analysis,
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tvb, 0, 0,
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"", "Sequence Analysis");
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seqnum_tree = proto_item_add_subtree(seqnum_ti,
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ett_pdcp_nr_sequence_analysis);
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PROTO_ITEM_SET_GENERATED(seqnum_ti);
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/* Previous bearer frame */
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if (p->previousFrameNum != 0) {
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proto_tree_add_uint(seqnum_tree, hf_pdcp_nr_sequence_analysis_previous_frame,
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tvb, 0, 0, p->previousFrameNum);
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}
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/* Expected sequence number */
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ti_expected_sn = proto_tree_add_uint(seqnum_tree, hf_pdcp_nr_sequence_analysis_expected_sn,
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tvb, 0, 0, p->sequenceExpected);
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PROTO_ITEM_SET_GENERATED(ti_expected_sn);
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/* Make sure we have recognised SN length */
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switch (p_pdcp_nr_info->seqnum_length) {
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case PDCP_NR_SN_LENGTH_12_BITS:
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case PDCP_NR_SN_LENGTH_18_BITS:
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break;
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default:
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DISSECTOR_ASSERT_NOT_REACHED();
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break;
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}
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switch (p->state) {
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case SN_OK:
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PROTO_ITEM_SET_HIDDEN(ti_expected_sn);
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ti = proto_tree_add_boolean(seqnum_tree, hf_pdcp_nr_sequence_analysis_ok,
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tvb, 0, 0, TRUE);
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PROTO_ITEM_SET_GENERATED(ti);
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proto_item_append_text(seqnum_ti, " - OK");
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/* Link to next SN in bearer (if known) */
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if (p->nextFrameNum != 0) {
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proto_tree_add_uint(seqnum_tree, hf_pdcp_nr_sequence_analysis_next_frame,
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tvb, 0, 0, p->nextFrameNum);
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}
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break;
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case SN_Missing:
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ti = proto_tree_add_boolean(seqnum_tree, hf_pdcp_nr_sequence_analysis_ok,
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tvb, 0, 0, FALSE);
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PROTO_ITEM_SET_GENERATED(ti);
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ti = proto_tree_add_boolean(seqnum_tree, hf_pdcp_nr_sequence_analysis_skipped,
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tvb, 0, 0, TRUE);
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PROTO_ITEM_SET_GENERATED(ti);
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if (p->lastSN != p->firstSN) {
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expert_add_info_format(pinfo, ti, &ei_pdcp_nr_sequence_analysis_sn_missing,
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"PDCP SNs (%u to %u) missing for %s on UE %u (%s-%u)",
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p->firstSN, p->lastSN,
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val_to_str_const(p_pdcp_nr_info->direction, direction_vals, "Unknown"),
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p_pdcp_nr_info->ueid,
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val_to_str_const(p_pdcp_nr_info->bearerType, bearer_type_vals, "Unknown"),
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p_pdcp_nr_info->bearerId);
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proto_item_append_text(seqnum_ti, " - SNs missing (%u to %u)",
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p->firstSN, p->lastSN);
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}
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else {
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expert_add_info_format(pinfo, ti, &ei_pdcp_nr_sequence_analysis_sn_missing,
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"PDCP SN (%u) missing for %s on UE %u (%s-%u)",
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p->firstSN,
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val_to_str_const(p_pdcp_nr_info->direction, direction_vals, "Unknown"),
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p_pdcp_nr_info->ueid,
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val_to_str_const(p_pdcp_nr_info->bearerType, bearer_type_vals, "Unknown"),
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p_pdcp_nr_info->bearerId);
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proto_item_append_text(seqnum_ti, " - SN missing (%u)",
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p->firstSN);
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}
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break;
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case SN_Repeated:
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ti = proto_tree_add_boolean(seqnum_tree, hf_pdcp_nr_sequence_analysis_ok,
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tvb, 0, 0, FALSE);
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PROTO_ITEM_SET_GENERATED(ti);
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ti = proto_tree_add_boolean(seqnum_tree, hf_pdcp_nr_sequence_analysis_repeated,
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tvb, 0, 0, TRUE);
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PROTO_ITEM_SET_GENERATED(ti);
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expert_add_info_format(pinfo, ti, &ei_pdcp_nr_sequence_analysis_sn_repeated,
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"PDCP SN (%u) repeated for %s for UE %u (%s-%u)",
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p->firstSN,
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val_to_str_const(p_pdcp_nr_info->direction, direction_vals, "Unknown"),
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p_pdcp_nr_info->ueid,
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val_to_str_const(p_pdcp_nr_info->bearerType, bearer_type_vals, "Unknown"),
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p_pdcp_nr_info->bearerId);
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|
proto_item_append_text(seqnum_ti, "- SN %u Repeated",
|
|
p->firstSN);
|
|
break;
|
|
|
|
default:
|
|
/* Incorrect sequence number */
|
|
expert_add_info_format(pinfo, ti_expected_sn, &ei_pdcp_nr_sequence_analysis_wrong_sequence_number,
|
|
"Wrong Sequence Number for %s on UE %u (%s-%u) - got %u, expected %u",
|
|
val_to_str_const(p_pdcp_nr_info->direction, direction_vals, "Unknown"),
|
|
p_pdcp_nr_info->ueid,
|
|
val_to_str_const(p_pdcp_nr_info->bearerType, bearer_type_vals, "Unknown"),
|
|
p_pdcp_nr_info->bearerId,
|
|
sequenceNumber, p->sequenceExpected);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* Update the bearer status and set report for this frame */
|
|
static void checkBearerSequenceInfo(packet_info *pinfo, tvbuff_t *tvb,
|
|
pdcp_nr_info *p_pdcp_nr_info,
|
|
guint32 sequenceNumber,
|
|
proto_tree *tree)
|
|
{
|
|
pdcp_bearer_hash_key bearer_key;
|
|
pdcp_bearer_status *p_bearer_status;
|
|
pdcp_sequence_report_in_frame *p_report_in_frame = NULL;
|
|
gboolean createdBearer = FALSE;
|
|
guint32 expectedSequenceNumber = 0;
|
|
guint32 snLimit = 0;
|
|
|
|
/* If find stat_report_in_frame already, use that and get out */
|
|
if (pinfo->fd->flags.visited) {
|
|
p_report_in_frame =
|
|
(pdcp_sequence_report_in_frame*)wmem_map_lookup(pdcp_nr_sequence_analysis_report_hash,
|
|
get_report_hash_key(sequenceNumber,
|
|
pinfo->num,
|
|
p_pdcp_nr_info, FALSE));
|
|
if (p_report_in_frame != NULL) {
|
|
addBearerSequenceInfo(p_report_in_frame, p_pdcp_nr_info,
|
|
sequenceNumber,
|
|
pinfo, tree, tvb);
|
|
return;
|
|
}
|
|
else {
|
|
/* Give up - we must have tried already... */
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
/**************************************************/
|
|
/* Create or find an entry for this bearer state */
|
|
bearer_key.ueId = p_pdcp_nr_info->ueid;
|
|
bearer_key.plane = p_pdcp_nr_info->plane;
|
|
bearer_key.bearerId = p_pdcp_nr_info->bearerId;
|
|
bearer_key.direction = p_pdcp_nr_info->direction;
|
|
bearer_key.notUsed = 0;
|
|
|
|
/* Do the table lookup */
|
|
p_bearer_status = (pdcp_bearer_status*)wmem_map_lookup(pdcp_sequence_analysis_bearer_hash,
|
|
get_bearer_hash_key(&bearer_key));
|
|
|
|
/* Create table entry if necessary */
|
|
if (p_bearer_status == NULL) {
|
|
createdBearer = TRUE;
|
|
|
|
/* Allocate a new value and duplicate key contents */
|
|
p_bearer_status = wmem_new0(wmem_file_scope(), pdcp_bearer_status);
|
|
|
|
/* Add entry */
|
|
wmem_map_insert(pdcp_sequence_analysis_bearer_hash,
|
|
get_bearer_hash_key(&bearer_key), p_bearer_status);
|
|
}
|
|
|
|
/* Create space for frame state_report */
|
|
p_report_in_frame = wmem_new(wmem_file_scope(), pdcp_sequence_report_in_frame);
|
|
p_report_in_frame->nextFrameNum = 0;
|
|
|
|
switch (p_pdcp_nr_info->seqnum_length) {
|
|
case PDCP_NR_SN_LENGTH_12_BITS:
|
|
snLimit = 4096;
|
|
break;
|
|
case PDCP_NR_SN_LENGTH_18_BITS:
|
|
snLimit = 262144;
|
|
break;
|
|
default:
|
|
DISSECTOR_ASSERT_NOT_REACHED();
|
|
break;
|
|
}
|
|
|
|
/* Work out expected sequence number */
|
|
if (!createdBearer) {
|
|
expectedSequenceNumber = (p_bearer_status->previousSequenceNumber + 1) % snLimit;
|
|
}
|
|
else {
|
|
expectedSequenceNumber = sequenceNumber;
|
|
}
|
|
|
|
/* Set report for this frame */
|
|
/* For PDCP, sequence number is always expectedSequence number */
|
|
p_report_in_frame->sequenceExpectedCorrect = (sequenceNumber == expectedSequenceNumber);
|
|
p_report_in_frame->hfn = p_bearer_status->hfn;
|
|
|
|
/* For wrong sequence number... */
|
|
if (!p_report_in_frame->sequenceExpectedCorrect) {
|
|
|
|
/* Frames are not missing if we get an earlier sequence number again */
|
|
if (((snLimit + expectedSequenceNumber - sequenceNumber) % snLimit) > 15) {
|
|
p_report_in_frame->state = SN_Missing;
|
|
p_report_in_frame->firstSN = expectedSequenceNumber;
|
|
p_report_in_frame->lastSN = (snLimit + sequenceNumber - 1) % snLimit;
|
|
|
|
p_report_in_frame->sequenceExpected = expectedSequenceNumber;
|
|
p_report_in_frame->previousFrameNum = p_bearer_status->previousFrameNum;
|
|
|
|
/* Update Bearer status to remember *this* frame */
|
|
p_bearer_status->previousFrameNum = pinfo->num;
|
|
p_bearer_status->previousSequenceNumber = sequenceNumber;
|
|
}
|
|
else {
|
|
/* An SN has been repeated */
|
|
p_report_in_frame->state = SN_Repeated;
|
|
p_report_in_frame->firstSN = sequenceNumber;
|
|
|
|
p_report_in_frame->sequenceExpected = expectedSequenceNumber;
|
|
p_report_in_frame->previousFrameNum = p_bearer_status->previousFrameNum;
|
|
}
|
|
}
|
|
else {
|
|
/* SN was OK */
|
|
p_report_in_frame->state = SN_OK;
|
|
p_report_in_frame->sequenceExpected = expectedSequenceNumber;
|
|
p_report_in_frame->previousFrameNum = p_bearer_status->previousFrameNum;
|
|
/* SN has rolled around, inc hfn! */
|
|
if (!createdBearer && (sequenceNumber == 0)) {
|
|
/* TODO: not worrying about HFN rolling over for now! */
|
|
p_bearer_status->hfn++;
|
|
p_report_in_frame->hfn = p_bearer_status->hfn;
|
|
}
|
|
|
|
/* Update Bearer status to remember *this* frame */
|
|
p_bearer_status->previousFrameNum = pinfo->num;
|
|
p_bearer_status->previousSequenceNumber = sequenceNumber;
|
|
|
|
if (p_report_in_frame->previousFrameNum != 0) {
|
|
/* Get report for previous frame */
|
|
pdcp_sequence_report_in_frame *p_previous_report;
|
|
p_previous_report = (pdcp_sequence_report_in_frame*)wmem_map_lookup(pdcp_nr_sequence_analysis_report_hash,
|
|
get_report_hash_key((sequenceNumber+262144) % 262144,
|
|
p_report_in_frame->previousFrameNum,
|
|
p_pdcp_nr_info,
|
|
FALSE));
|
|
/* It really shouldn't be NULL... */
|
|
if (p_previous_report != NULL) {
|
|
/* Point it forward to this one */
|
|
p_previous_report->nextFrameNum = pinfo->num;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Associate with this frame number */
|
|
wmem_map_insert(pdcp_nr_sequence_analysis_report_hash,
|
|
get_report_hash_key(sequenceNumber, pinfo->num,
|
|
p_pdcp_nr_info, TRUE),
|
|
p_report_in_frame);
|
|
|
|
/* Add state report for this frame into tree */
|
|
addBearerSequenceInfo(p_report_in_frame, p_pdcp_nr_info, sequenceNumber,
|
|
pinfo, tree, tvb);
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Result is (ueid, framenum) -> pdcp_security_info_t* */
|
|
typedef struct ueid_frame_t {
|
|
guint32 framenum;
|
|
guint16 ueid;
|
|
} ueid_frame_t;
|
|
|
|
|
|
|
|
/* Write the given formatted text to:
|
|
- the info column
|
|
- the top-level RLC PDU item */
|
|
static void write_pdu_label_and_info(proto_item *pdu_ti,
|
|
packet_info *pinfo, const char *format, ...)
|
|
{
|
|
#define MAX_INFO_BUFFER 256
|
|
static char info_buffer[MAX_INFO_BUFFER];
|
|
|
|
va_list ap;
|
|
|
|
va_start(ap, format);
|
|
g_vsnprintf(info_buffer, MAX_INFO_BUFFER, format, ap);
|
|
va_end(ap);
|
|
|
|
/* Add to indicated places */
|
|
col_append_str(pinfo->cinfo, COL_INFO, info_buffer);
|
|
/* TODO: gets called a lot, so a shame there isn't a proto_item_append_string() */
|
|
proto_item_append_text(pdu_ti, "%s", info_buffer);
|
|
}
|
|
|
|
|
|
|
|
/***************************************************************/
|
|
|
|
|
|
|
|
/* Show in the tree the config info attached to this frame, as generated fields */
|
|
static void show_pdcp_config(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree,
|
|
pdcp_nr_info *p_pdcp_info)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *configuration_tree;
|
|
proto_item *configuration_ti = proto_tree_add_item(tree,
|
|
hf_pdcp_nr_configuration,
|
|
tvb, 0, 0, ENC_ASCII|ENC_NA);
|
|
configuration_tree = proto_item_add_subtree(configuration_ti, ett_pdcp_configuration);
|
|
|
|
/* Direction */
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_direction, tvb, 0, 0,
|
|
p_pdcp_info->direction);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* Plane */
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_plane, tvb, 0, 0,
|
|
p_pdcp_info->plane);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* UEId */
|
|
if (p_pdcp_info->ueid != 0) {
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_ueid, tvb, 0, 0,
|
|
p_pdcp_info->ueid);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
|
|
/* Bearer type */
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_bearer_type, tvb, 0, 0,
|
|
p_pdcp_info->bearerType);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
if (p_pdcp_info->bearerId != 0) {
|
|
/* Bearer type */
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_bearer_id, tvb, 0, 0,
|
|
p_pdcp_info->bearerId);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
|
|
if (p_pdcp_info->plane == NR_USER_PLANE) {
|
|
/* Seqnum length */
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_seqnum_length, tvb, 0, 0,
|
|
p_pdcp_info->seqnum_length);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* ROHC compression */
|
|
ti = proto_tree_add_boolean(configuration_tree, hf_pdcp_nr_rohc_compression, tvb, 0, 0,
|
|
p_pdcp_info->rohc.rohc_compression);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* ROHC-specific settings */
|
|
if (p_pdcp_info->rohc.rohc_compression) {
|
|
|
|
/* Show ROHC mode */
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_rohc_mode, tvb, 0, 0,
|
|
p_pdcp_info->rohc.mode);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* Show RND */
|
|
ti = proto_tree_add_boolean(configuration_tree, hf_pdcp_nr_rohc_rnd, tvb, 0, 0,
|
|
p_pdcp_info->rohc.rnd);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* UDP Checksum */
|
|
ti = proto_tree_add_boolean(configuration_tree, hf_pdcp_nr_rohc_udp_checksum_present, tvb, 0, 0,
|
|
p_pdcp_info->rohc.udp_checksum_present);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* ROHC profile */
|
|
ti = proto_tree_add_uint(configuration_tree, hf_pdcp_nr_rohc_profile, tvb, 0, 0,
|
|
p_pdcp_info->rohc.profile);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* CID Inclusion Info */
|
|
ti = proto_tree_add_boolean(configuration_tree, hf_pdcp_nr_cid_inclusion_info, tvb, 0, 0,
|
|
p_pdcp_info->rohc.cid_inclusion_info);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
/* Large CID */
|
|
ti = proto_tree_add_boolean(configuration_tree, hf_pdcp_nr_large_cid_present, tvb, 0, 0,
|
|
p_pdcp_info->rohc.large_cid_present);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
}
|
|
|
|
/* Append summary to configuration root */
|
|
proto_item_append_text(configuration_ti, "(direction=%s, plane=%s",
|
|
val_to_str_const(p_pdcp_info->direction, direction_vals, "Unknown"),
|
|
val_to_str_const(p_pdcp_info->plane, pdcp_plane_vals, "Unknown"));
|
|
|
|
if (p_pdcp_info->rohc.rohc_compression) {
|
|
const char *mode = val_to_str_const(p_pdcp_info->rohc.mode, rohc_mode_vals, "Error");
|
|
proto_item_append_text(configuration_ti, ", mode=%c, profile=%s",
|
|
mode[0],
|
|
val_to_str_const(p_pdcp_info->rohc.profile, rohc_profile_vals, "Unknown"));
|
|
}
|
|
proto_item_append_text(configuration_ti, ")");
|
|
PROTO_ITEM_SET_GENERATED(configuration_ti);
|
|
|
|
/* Show plane in info column */
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s: ",
|
|
val_to_str_const(p_pdcp_info->plane, pdcp_plane_vals, "Unknown"));
|
|
|
|
}
|
|
|
|
|
|
/* Look for an RRC dissector for signalling data (using Bearer type and direction) */
|
|
static dissector_handle_t lookup_rrc_dissector_handle(struct pdcp_nr_info *p_pdcp_info)
|
|
{
|
|
dissector_handle_t rrc_handle = 0;
|
|
|
|
/* TODO: add as they become available */
|
|
switch (p_pdcp_info->bearerType)
|
|
{
|
|
case Bearer_CCCH:
|
|
break;
|
|
case Bearer_PCCH:
|
|
break;
|
|
case Bearer_BCCH_BCH:
|
|
break;
|
|
case Bearer_BCCH_DL_SCH:
|
|
break;
|
|
case Bearer_DCCH:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return rrc_handle;
|
|
}
|
|
|
|
|
|
/* Forwad declarations */
|
|
static int dissect_pdcp_nr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data);
|
|
|
|
static void report_heur_error(proto_tree *tree, packet_info *pinfo, expert_field *eiindex,
|
|
tvbuff_t *tvb, gint start, gint length)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *subtree;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PDCP-NR");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
ti = proto_tree_add_item(tree, proto_pdcp_nr, tvb, 0, -1, ENC_NA);
|
|
subtree = proto_item_add_subtree(ti, ett_pdcp);
|
|
proto_tree_add_expert(subtree, pinfo, eiindex, tvb, start, length);
|
|
}
|
|
|
|
/* Heuristic dissector looks for supported framing protocol (see wiki page) */
|
|
static gboolean dissect_pdcp_nr_heur(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree, void *data _U_)
|
|
{
|
|
gint offset = 0;
|
|
struct pdcp_nr_info *p_pdcp_nr_info;
|
|
tvbuff_t *pdcp_tvb;
|
|
guint8 tag = 0;
|
|
gboolean seqnumLengthTagPresent = FALSE;
|
|
|
|
/* Needs to be at least as long as:
|
|
- the signature string
|
|
- fixed header byte(s)
|
|
- tag for data
|
|
- at least one byte of PDCP PDU payload.
|
|
However, let attempted dissection show if there are any tags at all. */
|
|
gint min_length = (gint)(strlen(PDCP_NR_START_STRING) + 3); /* signature */
|
|
|
|
if (tvb_captured_length_remaining(tvb, offset) < min_length) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* OK, compare with signature string */
|
|
if (tvb_strneql(tvb, offset, PDCP_NR_START_STRING, strlen(PDCP_NR_START_STRING)) != 0) {
|
|
return FALSE;
|
|
}
|
|
offset += (gint)strlen(PDCP_NR_START_STRING);
|
|
|
|
|
|
/* If redissecting, use previous info struct (if available) */
|
|
p_pdcp_nr_info = (pdcp_nr_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_pdcp_nr, 0);
|
|
if (p_pdcp_nr_info == NULL) {
|
|
/* Allocate new info struct for this frame */
|
|
p_pdcp_nr_info = wmem_new0(wmem_file_scope(), pdcp_nr_info);
|
|
|
|
/* Read fixed fields */
|
|
p_pdcp_nr_info->plane = (enum pdcp_nr_plane)tvb_get_guint8(tvb, offset++);
|
|
if (p_pdcp_nr_info->plane == NR_SIGNALING_PLANE) {
|
|
/* Signalling plane always has 12 SN bits */
|
|
p_pdcp_nr_info->seqnum_length = PDCP_NR_SN_LENGTH_12_BITS;
|
|
}
|
|
|
|
/* Read tagged fields */
|
|
while (tag != PDCP_NR_PAYLOAD_TAG) {
|
|
/* Process next tag */
|
|
tag = tvb_get_guint8(tvb, offset++);
|
|
switch (tag) {
|
|
case PDCP_NR_SEQNUM_LENGTH_TAG:
|
|
p_pdcp_nr_info->seqnum_length = tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
seqnumLengthTagPresent = TRUE;
|
|
break;
|
|
case PDCP_NR_DIRECTION_TAG:
|
|
p_pdcp_nr_info->direction = tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
break;
|
|
case PDCP_NR_BEARER_TYPE_TAG:
|
|
p_pdcp_nr_info->bearerType = (NRBearerType)tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
break;
|
|
case PDCP_NR_BEARER_ID_TAG:
|
|
p_pdcp_nr_info->bearerId = tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
break;
|
|
case PDCP_NR_UEID_TAG:
|
|
p_pdcp_nr_info->ueid = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
break;
|
|
case PDCP_NR_ROHC_COMPRESSION_TAG:
|
|
p_pdcp_nr_info->rohc.rohc_compression = TRUE;
|
|
break;
|
|
case PDCP_NR_ROHC_IP_VERSION_TAG:
|
|
p_pdcp_nr_info->rohc.rohc_ip_version = tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
break;
|
|
case PDCP_NR_ROHC_CID_INC_INFO_TAG:
|
|
p_pdcp_nr_info->rohc.cid_inclusion_info = TRUE;
|
|
break;
|
|
case PDCP_NR_ROHC_LARGE_CID_PRES_TAG:
|
|
p_pdcp_nr_info->rohc.large_cid_present = TRUE;
|
|
break;
|
|
case PDCP_NR_ROHC_MODE_TAG:
|
|
p_pdcp_nr_info->rohc.mode = (enum rohc_mode)tvb_get_guint8(tvb, offset);
|
|
offset++;
|
|
break;
|
|
case PDCP_NR_ROHC_RND_TAG:
|
|
p_pdcp_nr_info->rohc.rnd = TRUE;
|
|
break;
|
|
case PDCP_NR_ROHC_UDP_CHECKSUM_PRES_TAG:
|
|
p_pdcp_nr_info->rohc.udp_checksum_present = TRUE;
|
|
break;
|
|
case PDCP_NR_ROHC_PROFILE_TAG:
|
|
p_pdcp_nr_info->rohc.profile = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
break;
|
|
case PDCP_NR_MACI_PRES_TAG:
|
|
p_pdcp_nr_info->maci_present = TRUE;
|
|
break;
|
|
case PDCP_NR_SDAP_HEADER_TAG:
|
|
p_pdcp_nr_info->sdap_header = tvb_get_guint8(tvb, offset) & 0x03;
|
|
offset++;
|
|
break;
|
|
|
|
case PDCP_NR_PAYLOAD_TAG:
|
|
/* Have reached data, so get out of loop */
|
|
p_pdcp_nr_info->pdu_length = tvb_reported_length_remaining(tvb, offset);
|
|
continue;
|
|
|
|
default:
|
|
/* It must be a recognised tag */
|
|
report_heur_error(tree, pinfo, &ei_pdcp_nr_unknown_udp_framing_tag, tvb, offset-1, 1);
|
|
wmem_free(wmem_file_scope(), p_pdcp_nr_info);
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
if ((p_pdcp_nr_info->plane == NR_USER_PLANE) && (seqnumLengthTagPresent == FALSE)) {
|
|
/* Conditional field is not present */
|
|
report_heur_error(tree, pinfo, &ei_pdcp_nr_missing_udp_framing_tag, tvb, 0, offset);
|
|
wmem_free(wmem_file_scope(), p_pdcp_nr_info);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Store info in packet */
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_pdcp_nr, 0, p_pdcp_nr_info);
|
|
}
|
|
else {
|
|
offset = tvb_reported_length(tvb) - p_pdcp_nr_info->pdu_length;
|
|
}
|
|
|
|
/**************************************/
|
|
/* OK, now dissect as PDCP nr */
|
|
|
|
/* Create tvb that starts at actual PDCP PDU */
|
|
pdcp_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
dissect_pdcp_nr(pdcp_tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/******************************/
|
|
/* Main dissection function. */
|
|
static int dissect_pdcp_nr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
const char *mode;
|
|
proto_tree *pdcp_tree = NULL;
|
|
proto_item *root_ti = NULL;
|
|
proto_item *ti;
|
|
gint offset = 0;
|
|
struct pdcp_nr_info *p_pdcp_info;
|
|
tvbuff_t *rohc_tvb = NULL;
|
|
|
|
tvbuff_t *payload_tvb;
|
|
|
|
/* Set protocol name. */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "PDCP-NR");
|
|
|
|
/* Look for attached packet info! */
|
|
p_pdcp_info = (struct pdcp_nr_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_pdcp_nr, 0);
|
|
/* Can't dissect anything without it... */
|
|
if (p_pdcp_info == NULL) {
|
|
return 0;
|
|
}
|
|
|
|
/* Don't want to overwrite the RLC Info column if configured not to */
|
|
if ((global_pdcp_nr_layer_to_show == ShowRLCLayer) &&
|
|
(p_get_proto_data(wmem_file_scope(), pinfo, proto_rlc_nr, 0) != NULL)) {
|
|
|
|
col_set_writable(pinfo->cinfo, COL_INFO, FALSE);
|
|
}
|
|
else {
|
|
/* TODO: won't help with multiple PDCP-or-traffic PDUs / frame... */
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
col_set_writable(pinfo->cinfo, COL_INFO, TRUE);
|
|
}
|
|
|
|
/* Create pdcp tree. */
|
|
if (tree) {
|
|
root_ti = proto_tree_add_item(tree, proto_pdcp_nr, tvb, offset, -1, ENC_NA);
|
|
pdcp_tree = proto_item_add_subtree(root_ti, ett_pdcp);
|
|
}
|
|
|
|
/* Set mode string */
|
|
mode = val_to_str_const(p_pdcp_info->rohc.mode, rohc_mode_vals, "Error");
|
|
|
|
/*****************************************************/
|
|
/* Show configuration (attached packet) info in tree */
|
|
if (pdcp_tree) {
|
|
show_pdcp_config(pinfo, tvb, pdcp_tree, p_pdcp_info);
|
|
}
|
|
|
|
/* Show ROHC mode */
|
|
if (p_pdcp_info->rohc.rohc_compression) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (mode=%c)", mode[0]);
|
|
}
|
|
|
|
|
|
/***********************************/
|
|
/* Handle PDCP header */
|
|
|
|
guint32 seqnum = 0;
|
|
gboolean seqnum_set = FALSE;
|
|
|
|
guint8 first_byte = tvb_get_guint8(tvb, offset);
|
|
|
|
/*****************************/
|
|
/* Signalling plane messages */
|
|
if (p_pdcp_info->plane == NR_SIGNALING_PLANE) {
|
|
/* Always 12 bits SN */
|
|
/* Verify 4 reserved bits are 0 */
|
|
guint8 reserved = (first_byte & 0xf0) >> 4;
|
|
ti = proto_tree_add_item(pdcp_tree, hf_pdcp_nr_control_plane_reserved,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
if (reserved != 0) {
|
|
expert_add_info_format(pinfo, ti, &ei_pdcp_nr_reserved_bits_not_zero,
|
|
"PDCP signalling header reserved bits not zero");
|
|
}
|
|
|
|
/* 12-bit sequence number */
|
|
proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_seq_num_12, tvb, offset, 2, ENC_BIG_ENDIAN, &seqnum);
|
|
seqnum_set = TRUE;
|
|
write_pdu_label_and_info(root_ti, pinfo, " (SN=%-4u)", seqnum);
|
|
offset += 2;
|
|
|
|
if (tvb_captured_length_remaining(tvb, offset) == 0) {
|
|
/* Only PDCP header was captured, stop dissection here */
|
|
return offset;
|
|
}
|
|
}
|
|
else if (p_pdcp_info->plane == NR_USER_PLANE) {
|
|
|
|
/**********************************/
|
|
/* User-plane messages */
|
|
gboolean is_user_plane;
|
|
|
|
/* Data/Control flag */
|
|
proto_tree_add_item_ret_boolean(pdcp_tree, hf_pdcp_nr_data_control, tvb, offset, 1, ENC_BIG_ENDIAN, &is_user_plane);
|
|
|
|
if (is_user_plane) {
|
|
/*****************************/
|
|
/* User-plane Data */
|
|
guint32 reserved_value;
|
|
|
|
/* Number of sequence number bits depends upon config */
|
|
switch (p_pdcp_info->seqnum_length) {
|
|
case PDCP_NR_SN_LENGTH_12_BITS:
|
|
/* 3 reserved bits */
|
|
ti = proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_reserved3, tvb, offset, 1, ENC_BIG_ENDIAN, &reserved_value);
|
|
|
|
/* Complain if not 0 */
|
|
if (reserved_value != 0) {
|
|
expert_add_info_format(pinfo, ti, &ei_pdcp_nr_reserved_bits_not_zero,
|
|
"Reserved bits have value 0x%x - should be 0x0",
|
|
reserved_value);
|
|
}
|
|
|
|
/* 12-bit sequence number */
|
|
proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_seq_num_12, tvb, offset, 2, ENC_BIG_ENDIAN, &seqnum);
|
|
seqnum_set = TRUE;
|
|
offset += 2;
|
|
break;
|
|
case PDCP_NR_SN_LENGTH_18_BITS:
|
|
/* 5 reserved bits */
|
|
ti = proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_reserved5, tvb, offset, 1, ENC_BIG_ENDIAN, &reserved_value);
|
|
|
|
/* Complain if not 0 */
|
|
if (reserved_value != 0) {
|
|
expert_add_info_format(pinfo, ti, &ei_pdcp_nr_reserved_bits_not_zero,
|
|
"Reserved bits have value 0x%x - should be 0x0",
|
|
reserved_value);
|
|
}
|
|
|
|
/* 18-bit sequence number */
|
|
proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_seq_num_18, tvb, offset, 3, ENC_BIG_ENDIAN, &seqnum);
|
|
seqnum_set = TRUE;
|
|
offset += 3;
|
|
break;
|
|
default:
|
|
/* Not a recognised data format!!!!! */
|
|
return 1;
|
|
}
|
|
|
|
write_pdu_label_and_info(root_ti, pinfo, " (SN=%-6u)", seqnum);
|
|
}
|
|
else {
|
|
/*******************************/
|
|
/* User-plane Control messages */
|
|
guint32 control_pdu_type;
|
|
proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_control_pdu_type, tvb, offset, 1, ENC_BIG_ENDIAN, &control_pdu_type);
|
|
|
|
switch (control_pdu_type) {
|
|
case 0: /* PDCP status report */
|
|
{
|
|
guint32 fmc;
|
|
guint not_received = 0;
|
|
guint i, j, l;
|
|
guint32 len, bit_offset;
|
|
proto_tree *bitmap_tree;
|
|
proto_item *bitmap_ti = NULL;
|
|
gchar *buff = NULL;
|
|
#define BUFF_SIZE 89
|
|
guint32 reserved_value;
|
|
|
|
/* 4 bits reserved */
|
|
ti = proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_reserved4, tvb, offset, 1, ENC_BIG_ENDIAN, &reserved_value);
|
|
|
|
/* Complain if not 0 */
|
|
if (reserved_value != 0) {
|
|
expert_add_info_format(pinfo, ti, &ei_pdcp_nr_reserved_bits_not_zero,
|
|
"Reserved bits have value 0x%x - should be 0x0",
|
|
reserved_value);
|
|
}
|
|
offset++;
|
|
|
|
/* First-Missing-Count */
|
|
proto_tree_add_item_ret_uint(pdcp_tree, hf_pdcp_nr_fmc, tvb, offset, 4, ENC_BIG_ENDIAN, &fmc);
|
|
offset += 4;
|
|
|
|
|
|
/* Bitmap tree */
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
bitmap_ti = proto_tree_add_item(pdcp_tree, hf_pdcp_nr_bitmap, tvb,
|
|
offset, -1, ENC_NA);
|
|
bitmap_tree = proto_item_add_subtree(bitmap_ti, ett_pdcp_report_bitmap);
|
|
|
|
buff = (gchar *)wmem_alloc(wmem_packet_scope(), BUFF_SIZE);
|
|
len = tvb_reported_length_remaining(tvb, offset);
|
|
bit_offset = offset<<3;
|
|
|
|
/* For each byte... */
|
|
for (i=0; i<len; i++) {
|
|
guint8 bits = tvb_get_bits8(tvb, bit_offset, 8);
|
|
for (l=0, j=0; l<8; l++) {
|
|
if ((bits << l) & 0x80) {
|
|
if (bitmap_tree) {
|
|
// TODO: better to do mod and show as SN instead?
|
|
j += g_snprintf(&buff[j], BUFF_SIZE-j, "%10u,", (unsigned)(fmc+(8*i)+l+1));
|
|
}
|
|
} else {
|
|
if (bitmap_tree) {
|
|
j += (guint)g_strlcpy(&buff[j], " ,", BUFF_SIZE-j);
|
|
}
|
|
not_received++;
|
|
}
|
|
}
|
|
if (bitmap_tree) {
|
|
proto_tree_add_uint_format(bitmap_tree, hf_pdcp_nr_bitmap_byte, tvb, bit_offset/8, 1, bits, "%s", buff);
|
|
}
|
|
bit_offset += 8;
|
|
}
|
|
}
|
|
|
|
if (bitmap_ti != NULL) {
|
|
proto_item_append_text(bitmap_ti, " (%u SNs not received)", not_received);
|
|
}
|
|
write_pdu_label_and_info(root_ti, pinfo, " Status Report (fmc=%u) not-received=%u",
|
|
fmc, not_received);
|
|
}
|
|
return 1;
|
|
|
|
case 1: /* ROHC Feedback */
|
|
offset++;
|
|
break; /* Drop-through to dissect feedback */
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
/* Invalid plane setting...! */
|
|
write_pdu_label_and_info(root_ti, pinfo, " - INVALID PLANE (%u)",
|
|
p_pdcp_info->plane);
|
|
return 1;
|
|
}
|
|
|
|
/* Do sequence analysis if configured to. */
|
|
if (seqnum_set) {
|
|
gboolean do_analysis = FALSE;
|
|
|
|
switch (global_pdcp_check_sequence_numbers) {
|
|
case FALSE:
|
|
break;
|
|
case SEQUENCE_ANALYSIS_RLC_ONLY:
|
|
if ((p_get_proto_data(wmem_file_scope(), pinfo, proto_rlc_nr, 0) != NULL) &&
|
|
!p_pdcp_info->is_retx) {
|
|
do_analysis = TRUE;
|
|
}
|
|
break;
|
|
case SEQUENCE_ANALYSIS_PDCP_ONLY:
|
|
if (p_get_proto_data(wmem_file_scope(), pinfo, proto_rlc_nr, 0) == NULL) {
|
|
do_analysis = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (do_analysis) {
|
|
checkBearerSequenceInfo(pinfo, tvb, p_pdcp_info,
|
|
seqnum, pdcp_tree);
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************/
|
|
/* Now deal with the payload */
|
|
/*******************************************************/
|
|
|
|
payload_tvb = tvb;
|
|
|
|
if (p_pdcp_info->plane == NR_SIGNALING_PLANE) {
|
|
guint32 data_length;
|
|
|
|
/* Compute payload length (no MAC on common control Bearers) */
|
|
data_length = tvb_reported_length_remaining(payload_tvb, offset)-4;
|
|
|
|
|
|
/* RRC data is all but last 4 bytes.
|
|
Call nr-rrc dissector (according to direction and Bearer type) if we have valid data */
|
|
if (global_pdcp_dissect_signalling_plane_as_rrc) {
|
|
/* Get appropriate dissector handle */
|
|
dissector_handle_t rrc_handle = lookup_rrc_dissector_handle(p_pdcp_info);
|
|
|
|
if (rrc_handle != 0) {
|
|
/* Call RRC dissector if have one */
|
|
tvbuff_t *rrc_payload_tvb = tvb_new_subset_length(payload_tvb, offset, data_length);
|
|
gboolean was_writable = col_get_writable(pinfo->cinfo, COL_INFO);
|
|
|
|
/* We always want to see this in the info column */
|
|
col_set_writable(pinfo->cinfo, COL_INFO, TRUE);
|
|
|
|
call_dissector_only(rrc_handle, rrc_payload_tvb, pinfo, pdcp_tree, NULL);
|
|
|
|
/* Restore to whatever it was */
|
|
col_set_writable(pinfo->cinfo, COL_INFO, was_writable);
|
|
}
|
|
else {
|
|
/* Just show data */
|
|
proto_tree_add_item(pdcp_tree, hf_pdcp_nr_signalling_data, payload_tvb, offset,
|
|
data_length, ENC_NA);
|
|
}
|
|
}
|
|
else {
|
|
/* Just show as unparsed data */
|
|
proto_tree_add_item(pdcp_tree, hf_pdcp_nr_signalling_data, payload_tvb, offset,
|
|
data_length, ENC_NA);
|
|
}
|
|
|
|
if (p_pdcp_info->bearerType == Bearer_DCCH) {
|
|
p_pdcp_info->maci_present = TRUE;
|
|
} else {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (%u bytes data)", data_length);
|
|
}
|
|
}
|
|
else if (tvb_captured_length_remaining(payload_tvb, offset)) {
|
|
/* User-plane payload here. */
|
|
gint payload_length = tvb_reported_length_remaining(payload_tvb, offset) - ((p_pdcp_info->maci_present) ? 4 : 0);
|
|
|
|
if ((p_pdcp_info->direction == PDCP_NR_DIRECTION_UPLINK &&
|
|
p_pdcp_info->sdap_header & PDCP_NR_UL_SDAP_HEADER_PRESENT) ||
|
|
(p_pdcp_info->direction == PDCP_NR_DIRECTION_DOWNLINK &&
|
|
p_pdcp_info->sdap_header & PDCP_NR_DL_SDAP_HEADER_PRESENT)) {
|
|
proto_item *sdap_ti;
|
|
proto_tree *sdap_tree;
|
|
|
|
sdap_ti = proto_tree_add_item(pdcp_tree, proto_sdap, payload_tvb, offset, 1, ENC_NA);
|
|
sdap_tree = proto_item_add_subtree(sdap_ti, ett_sdap);
|
|
if (p_pdcp_info->direction == PDCP_NR_DIRECTION_UPLINK) {
|
|
proto_tree_add_item(sdap_tree, hf_sdap_data_control, payload_tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(sdap_tree, hf_sdap_reserved, payload_tvb, offset, 1, ENC_NA);
|
|
} else {
|
|
proto_tree_add_item(sdap_tree, hf_sdap_rdi, payload_tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(sdap_tree, hf_sdap_rqi, payload_tvb, offset, 1, ENC_NA);
|
|
}
|
|
proto_tree_add_item(sdap_tree, hf_sdap_qfi, payload_tvb, offset, 1, ENC_NA);
|
|
offset++;
|
|
payload_length--;
|
|
}
|
|
|
|
if (payload_length > 0) {
|
|
/* If not compressed with ROHC, show as user-plane data */
|
|
if (!p_pdcp_info->rohc.rohc_compression) {
|
|
/* Not attempting to decode payload if ciphering is enabled
|
|
(and NULL ciphering is not being used) */
|
|
if (global_pdcp_dissect_user_plane_as_ip) {
|
|
tvbuff_t *ip_payload_tvb = tvb_new_subset_length(payload_tvb, offset, payload_length);
|
|
|
|
/* Don't update info column for ROHC unless configured to */
|
|
if (global_pdcp_nr_layer_to_show != ShowTrafficLayer) {
|
|
col_set_writable(pinfo->cinfo, COL_INFO, FALSE);
|
|
}
|
|
|
|
switch (tvb_get_guint8(ip_payload_tvb, 0) & 0xf0) {
|
|
case 0x40:
|
|
call_dissector_only(ip_handle, ip_payload_tvb, pinfo, pdcp_tree, NULL);
|
|
break;
|
|
case 0x60:
|
|
call_dissector_only(ipv6_handle, ip_payload_tvb, pinfo, pdcp_tree, NULL);
|
|
break;
|
|
default:
|
|
call_data_dissector(ip_payload_tvb, pinfo, pdcp_tree);
|
|
break;
|
|
}
|
|
|
|
/* Freeze the columns again because we don't want other layers writing to info */
|
|
if (global_pdcp_nr_layer_to_show == ShowTrafficLayer) {
|
|
col_set_writable(pinfo->cinfo, COL_INFO, FALSE);
|
|
}
|
|
|
|
}
|
|
else {
|
|
proto_tree_add_item(pdcp_tree, hf_pdcp_nr_user_plane_data, payload_tvb, offset, payload_length, ENC_NA);
|
|
}
|
|
}
|
|
else {
|
|
/***************************/
|
|
/* ROHC packets */
|
|
/***************************/
|
|
|
|
/* Only attempt ROHC if configured to */
|
|
if (!global_pdcp_dissect_rohc) {
|
|
col_append_fstr(pinfo->cinfo, COL_PROTOCOL, "|ROHC(%s)",
|
|
val_to_str_const(p_pdcp_info->rohc.profile, rohc_profile_vals, "Unknown"));
|
|
proto_tree_add_item(pdcp_tree, hf_pdcp_nr_user_plane_data, payload_tvb, offset, payload_length, ENC_NA);
|
|
}
|
|
else {
|
|
rohc_tvb = tvb_new_subset_length(payload_tvb, offset, payload_length);
|
|
|
|
/* Only enable writing to column if configured to show ROHC */
|
|
if (global_pdcp_nr_layer_to_show != ShowTrafficLayer) {
|
|
col_set_writable(pinfo->cinfo, COL_INFO, FALSE);
|
|
}
|
|
else {
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
}
|
|
|
|
/* Call the ROHC dissector */
|
|
call_dissector_with_data(rohc_handle, rohc_tvb, pinfo, tree, &p_pdcp_info->rohc);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* MAC */
|
|
if (p_pdcp_info->maci_present) {
|
|
/* Last 4 bytes are MAC */
|
|
gint mac_offset = tvb_reported_length(tvb)-4;
|
|
guint32 mac = tvb_get_ntohl(payload_tvb, mac_offset);
|
|
proto_tree_add_item(pdcp_tree, hf_pdcp_nr_mac, payload_tvb, mac_offset, 4, ENC_BIG_ENDIAN);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " MAC=0x%08x", mac);
|
|
}
|
|
|
|
/* Let RLC write to columns again */
|
|
col_set_writable(pinfo->cinfo, COL_INFO, global_pdcp_nr_layer_to_show == ShowRLCLayer);
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
|
|
void proto_register_pdcp_nr(void)
|
|
{
|
|
static hf_register_info hf_pdcp[] =
|
|
{
|
|
{ &hf_pdcp_nr_configuration,
|
|
{ "Configuration",
|
|
"pdcp-nr.configuration", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Configuration info passed into dissector", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_direction,
|
|
{ "Direction",
|
|
"pdcp-nr.direction", FT_UINT8, BASE_DEC, VALS(direction_vals), 0x0,
|
|
"Direction of message", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_ueid,
|
|
{ "UE",
|
|
"pdcp-nr.ueid", FT_UINT16, BASE_DEC, 0, 0x0,
|
|
"UE Identifier", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_bearer_type,
|
|
{ "Bearer type",
|
|
"pdcp-nr.Bearer-type", FT_UINT8, BASE_DEC, VALS(bearer_type_vals), 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_bearer_id,
|
|
{ "Bearer Id",
|
|
"pdcp-nr.bearer-id", FT_UINT8, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_plane,
|
|
{ "Plane",
|
|
"pdcp-nr.plane", FT_UINT8, BASE_DEC, VALS(pdcp_plane_vals), 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_seqnum_length,
|
|
{ "Seqnum length",
|
|
"pdcp-nr.seqnum_length", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Sequence Number Length", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_pdcp_nr_rohc_compression,
|
|
{ "ROHC Compression",
|
|
"pdcp-nr.rohc.compression", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_rohc_mode,
|
|
{ "ROHC Mode",
|
|
"pdcp-nr.rohc.mode", FT_UINT8, BASE_DEC, VALS(rohc_mode_vals), 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_rohc_rnd,
|
|
{ "RND",
|
|
"pdcp-nr.rohc.rnd", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"RND of outer ip header", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_rohc_udp_checksum_present,
|
|
{ "UDP Checksum",
|
|
"pdcp-nr.rohc.checksum-present", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"UDP Checksum present", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_rohc_profile,
|
|
{ "ROHC profile",
|
|
"pdcp-nr.rohc.profile", FT_UINT8, BASE_DEC, VALS(rohc_profile_vals), 0x0,
|
|
"ROHC Mode", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_cid_inclusion_info,
|
|
{ "CID Inclusion Info",
|
|
"pdcp-nr.cid-inclusion-info", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_large_cid_present,
|
|
{ "Large CID Present",
|
|
"pdcp-nr.large-cid-present", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_pdcp_nr_control_plane_reserved,
|
|
{ "Reserved",
|
|
"pdcp-nr.reserved", FT_UINT8, BASE_DEC, NULL, 0xf0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_reserved3,
|
|
{ "Reserved",
|
|
"pdcp-nr.reserved3", FT_UINT8, BASE_HEX, NULL, 0x70,
|
|
"3 reserved bits", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_seq_num_12,
|
|
{ "Seq Num",
|
|
"pdcp-nr.seq-num", FT_UINT16, BASE_DEC, NULL, 0x0fff,
|
|
"PDCP Seq num", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_reserved5,
|
|
{ "Reserved",
|
|
"pdcp-nr.reserved5", FT_UINT8, BASE_HEX, NULL, 0x7c,
|
|
"5 reserved bits", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_seq_num_18,
|
|
{ "Seq Num",
|
|
"pdcp-nr.seq-num", FT_UINT24, BASE_DEC, NULL, 0x3ffff,
|
|
"PDCP Seq num", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_signalling_data,
|
|
{ "Signalling Data",
|
|
"pdcp-nr.signalling-data", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_mac,
|
|
{ "MAC",
|
|
"pdcp-nr.mac", FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_data_control,
|
|
{ "PDU Type",
|
|
"pdcp-nr.pdu-type", FT_BOOLEAN, 8, TFS(&pdu_type_bit), 0x80,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_user_plane_data,
|
|
{ "User-Plane Data",
|
|
"pdcp-nr.user-data", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_control_pdu_type,
|
|
{ "Control PDU Type",
|
|
"pdcp-nr.control-pdu-type", FT_UINT8, BASE_HEX, VALS(control_pdu_type_vals), 0x70,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_fmc,
|
|
{ "First Missing Count",
|
|
"pdcp-nr.fmc", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_reserved4,
|
|
{ "Reserved",
|
|
"pdcp-nr.reserved4", FT_UINT8, BASE_HEX, NULL, 0x0f,
|
|
"4 reserved bits", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_bitmap,
|
|
{ "Bitmap",
|
|
"pdcp-nr.bitmap", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"Status report bitmap (0=error, 1=OK)", HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_bitmap_byte,
|
|
{ "Bitmap byte",
|
|
"pdcp-nr.bitmap.byte", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_pdcp_nr_sequence_analysis,
|
|
{ "Sequence Analysis",
|
|
"pdcp-nr.sequence-analysis", FT_STRING, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_sequence_analysis_ok,
|
|
{ "OK",
|
|
"pdcp-nr.sequence-analysis.ok", FT_BOOLEAN, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_sequence_analysis_previous_frame,
|
|
{ "Previous frame for Bearer",
|
|
"pdcp-nr.sequence-analysis.previous-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_sequence_analysis_next_frame,
|
|
{ "Next frame for Bearer",
|
|
"pdcp-nr.sequence-analysis.next-frame", FT_FRAMENUM, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_sequence_analysis_expected_sn,
|
|
{ "Expected SN",
|
|
"pdcp-nr.sequence-analysis.expected-sn", FT_UINT32, BASE_DEC, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_sequence_analysis_skipped,
|
|
{ "Skipped frames",
|
|
"pdcp-nr.sequence-analysis.skipped-frames", FT_BOOLEAN, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_pdcp_nr_sequence_analysis_repeated,
|
|
{ "Repeated frame",
|
|
"pdcp-nr.sequence-analysis.repeated-frame", FT_BOOLEAN, BASE_NONE, 0, 0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
};
|
|
|
|
static hf_register_info hf_sdap[] =
|
|
{
|
|
{ &hf_sdap_rdi,
|
|
{ "RDI",
|
|
"sdap.rdi", FT_BOOLEAN, 8, TFS(&sdap_rdi), 0x80,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_sdap_rqi,
|
|
{ "RQI",
|
|
"sdap.rqi", FT_BOOLEAN, 8, TFS(&sdap_rqi), 0x40,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_sdap_qfi,
|
|
{ "QFI",
|
|
"sdap.qfi", FT_UINT8, BASE_DEC, NULL, 0x3f,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_sdap_data_control,
|
|
{ "PDU Type",
|
|
"sdap.reserved", FT_BOOLEAN, 8, TFS(&pdu_type_bit), 0x80,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{ &hf_sdap_reserved,
|
|
{ "Reserved",
|
|
"sdap.reserved", FT_UINT8, BASE_HEX, NULL, 0x40,
|
|
NULL, HFILL
|
|
}
|
|
}
|
|
};
|
|
|
|
static gint *ett[] =
|
|
{
|
|
&ett_pdcp,
|
|
&ett_pdcp_configuration,
|
|
&ett_pdcp_packet,
|
|
&ett_pdcp_nr_sequence_analysis,
|
|
&ett_pdcp_report_bitmap,
|
|
&ett_sdap
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_pdcp_nr_sequence_analysis_sn_missing, { "pdcp-nr.sequence-analysis.sn-missing", PI_SEQUENCE, PI_WARN, "PDCP SN missing", EXPFILL }},
|
|
{ &ei_pdcp_nr_sequence_analysis_sn_repeated, { "pdcp-nr.sequence-analysis.sn-repeated", PI_SEQUENCE, PI_WARN, "PDCP SN repeated", EXPFILL }},
|
|
{ &ei_pdcp_nr_sequence_analysis_wrong_sequence_number, { "pdcp-nr.sequence-analysis.wrong-sequence-number", PI_SEQUENCE, PI_WARN, "Wrong Sequence Number", EXPFILL }},
|
|
{ &ei_pdcp_nr_reserved_bits_not_zero, { "pdcp-nr.reserved-bits-not-zero", PI_MALFORMED, PI_ERROR, "Reserved bits not zero", EXPFILL }},
|
|
{ &ei_pdcp_nr_unknown_udp_framing_tag, { "pdcp-nr.unknown-udp-framing-tag", PI_UNDECODED, PI_WARN, "Unknown UDP framing tag, aborting dissection", EXPFILL }},
|
|
{ &ei_pdcp_nr_missing_udp_framing_tag, { "pdcp-nr.missing-udp-framing-tag", PI_UNDECODED, PI_WARN, "Missing UDP framing conditional tag, aborting dissection", EXPFILL }}
|
|
};
|
|
|
|
static const enum_val_t sequence_analysis_vals[] = {
|
|
{"no-analysis", "No-Analysis", FALSE},
|
|
{"rlc-only", "Only-RLC-frames", SEQUENCE_ANALYSIS_RLC_ONLY},
|
|
{"pdcp-only", "Only-PDCP-frames", SEQUENCE_ANALYSIS_PDCP_ONLY},
|
|
{NULL, NULL, -1}
|
|
};
|
|
|
|
static const enum_val_t show_info_col_vals[] = {
|
|
{"show-rlc", "RLC Info", ShowRLCLayer},
|
|
{"show-pdcp", "PDCP Info", ShowPDCPLayer},
|
|
{"show-traffic", "Traffic Info", ShowTrafficLayer},
|
|
{NULL, NULL, -1}
|
|
};
|
|
|
|
module_t *pdcp_nr_module;
|
|
expert_module_t* expert_pdcp_nr;
|
|
|
|
/* Register protocol. */
|
|
proto_pdcp_nr = proto_register_protocol("PDCP-NR", "PDCP-NR", "pdcp-nr");
|
|
proto_register_field_array(proto_pdcp_nr, hf_pdcp, array_length(hf_pdcp));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_pdcp_nr = expert_register_protocol(proto_pdcp_nr);
|
|
expert_register_field_array(expert_pdcp_nr, ei, array_length(ei));
|
|
proto_sdap = proto_register_protocol("SDAP", "SDAP", "sdap");
|
|
proto_register_field_array(proto_sdap, hf_sdap, array_length(hf_sdap));
|
|
|
|
/* Allow other dissectors to find this one by name. */
|
|
register_dissector("pdcp-nr", dissect_pdcp_nr, proto_pdcp_nr);
|
|
|
|
pdcp_nr_module = prefs_register_protocol(proto_pdcp_nr, NULL);
|
|
|
|
/* Dissect uncompressed user-plane data as IP */
|
|
prefs_register_bool_preference(pdcp_nr_module, "show_user_plane_as_ip",
|
|
"Show uncompressed User-Plane data as IP",
|
|
"Show uncompressed User-Plane data as IP",
|
|
&global_pdcp_dissect_user_plane_as_ip);
|
|
|
|
/* Dissect unciphered signalling data as RRC */
|
|
prefs_register_bool_preference(pdcp_nr_module, "show_signalling_plane_as_rrc",
|
|
"Show unciphered Signalling-Plane data as RRC",
|
|
"Show unciphered Signalling-Plane data as RRC",
|
|
&global_pdcp_dissect_signalling_plane_as_rrc);
|
|
|
|
/* Check for missing sequence numbers */
|
|
prefs_register_enum_preference(pdcp_nr_module, "check_sequence_numbers",
|
|
"Do sequence number analysis",
|
|
"Do sequence number analysis",
|
|
&global_pdcp_check_sequence_numbers, sequence_analysis_vals, FALSE);
|
|
|
|
/* Attempt to dissect ROHC messages */
|
|
prefs_register_bool_preference(pdcp_nr_module, "dissect_rohc",
|
|
"Attempt to decode ROHC data",
|
|
"Attempt to decode ROHC data",
|
|
&global_pdcp_dissect_rohc);
|
|
|
|
prefs_register_obsolete_preference(pdcp_nr_module, "heuristic_pdcp_nr_over_udp");
|
|
|
|
prefs_register_enum_preference(pdcp_nr_module, "layer_to_show",
|
|
"Which layer info to show in Info column",
|
|
"Can show RLC, PDCP or Traffic layer info in Info column",
|
|
&global_pdcp_nr_layer_to_show, show_info_col_vals, FALSE);
|
|
|
|
|
|
pdcp_sequence_analysis_bearer_hash = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), g_direct_hash, g_direct_equal);
|
|
pdcp_nr_sequence_analysis_report_hash = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), pdcp_result_hash_func, pdcp_result_hash_equal);
|
|
}
|
|
|
|
void proto_reg_handoff_pdcp_nr(void)
|
|
{
|
|
/* Add as a heuristic UDP dissector */
|
|
heur_dissector_add("udp", dissect_pdcp_nr_heur, "PDCP-NR over UDP", "pdcp_nr_udp", proto_pdcp_nr, HEURISTIC_DISABLE);
|
|
|
|
ip_handle = find_dissector_add_dependency("ip", proto_pdcp_nr);
|
|
ipv6_handle = find_dissector_add_dependency("ipv6", proto_pdcp_nr);
|
|
rohc_handle = find_dissector_add_dependency("rohc", proto_pdcp_nr);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|