forked from osmocom/wireshark
![Stig Bjørlykke](/assets/img/avatar_default.png)
Change-Id: I47022f9c7d568ca6d9705ba63c669a980822818a Reviewed-on: https://code.wireshark.org/review/27229 Petri-Dish: Stig Bjørlykke <stig@bjorlykke.org> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>
1922 lines
52 KiB
C
1922 lines
52 KiB
C
/* packet-ses.c
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*
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* Routine to dissect ITU-T Rec. X.225 (1995 E)/ISO 8327-1 OSI Session Protocol packets
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*
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* Yuriy Sidelnikov <YSidelnikov@hotmail.com>
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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/reassemble.h>
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#include <epan/proto_data.h>
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#include <wsutil/str_util.h>
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#include "packet-ber.h"
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#include "packet-ses.h"
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void proto_register_ses(void);
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void proto_reg_handoff_ses(void);
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void proto_register_clses(void);
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void proto_reg_handoff_clses(void);
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/* ses header fields */
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static int proto_ses = -1;
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static int hf_ses_type = -1;
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static int hf_ses_type_0 = -1;
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static int hf_ses_length = -1;
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/* static int hf_ses_version = -1; */
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/* static int hf_ses_reserved = -1; */
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static int hf_ses_segment_data = -1;
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static int hf_ses_segments = -1;
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static int hf_ses_segment = -1;
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static int hf_ses_segment_overlap = -1;
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static int hf_ses_segment_overlap_conflicts = -1;
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static int hf_ses_segment_multiple_tails = -1;
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static int hf_ses_segment_too_long_segment = -1;
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static int hf_ses_segment_error = -1;
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static int hf_ses_segment_count = -1;
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static int hf_ses_reassembled_in = -1;
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static int hf_ses_reassembled_length = -1;
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/* ses fields defining a sub tree */
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static gint ett_ses = -1;
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static gint ett_ses_param = -1;
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static gint ett_ses_segment = -1;
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static gint ett_ses_segments = -1;
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/* flags */
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static int hf_connect_protocol_options_flags = -1;
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static int hf_version_number_options_flags = -1;
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static int hf_enclosure_item_options_flags = -1;
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static int hf_token_item_options_flags = -1;
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static gint ett_connect_protocol_options_flags = -1;
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static gint ett_transport_options_flags = -1;
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static gint ett_protocol_version_flags = -1;
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static gint ett_enclosure_item_flags = -1;
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static gint ett_token_item_flags = -1;
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static gint ett_ses_req_options_flags = -1;
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/* called SS user reference */
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static int hf_called_ss_user_reference = -1;
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/* calling SS user reference */
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static int hf_calling_ss_user_reference = -1;
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/* common reference */
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static int hf_common_reference = -1;
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/* additional reference information */
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static int hf_additional_reference_information = -1;
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/* token item */
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static int hf_release_token = -1;
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static int hf_major_activity_token = -1;
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static int hf_synchronize_minor_token = -1;
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static int hf_data_token = -1;
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/* protocol options */
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static int hf_able_to_receive_extended_concatenated_SPDU = -1;
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/* session requirement */
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static int hf_session_user_req_flags = -1;
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static int hf_session_exception_report= -1;
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static int hf_data_separation_function_unit= -1;
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static int hf_symmetric_synchronize_function_unit= -1;
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static int hf_typed_data_function_unit= -1;
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static int hf_exception_function_unit= -1;
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static int hf_capability_function_unit=-1;
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static int hf_negotiated_release_function_unit= -1;
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static int hf_activity_management_function_unit= -1;
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static int hf_resynchronize_function_unit= -1;
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static int hf_major_resynchronize_function_unit= -1;
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static int hf_minor_resynchronize_function_unit= -1;
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static int hf_expedited_data_resynchronize_function_unit= -1;
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static int hf_duplex_function_unit= -1;
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static int hf_half_duplex_function_unit = -1;
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/* TSDU maximum size */
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static int hf_proposed_tsdu_maximum_size_i2r = -1;
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static int hf_proposed_tsdu_maximum_size_r2i = -1;
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/* protocol version */
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static int hf_protocol_version_1 = -1;
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static int hf_protocol_version_2 = -1;
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/* initial serial number */
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static int hf_initial_serial_number = -1;
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/* enclosure item */
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static int hf_beginning_of_SSDU = -1;
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static int hf_end_of_SSDU = -1;
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/* token setting item */
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static const value_string token_setting_vals[] = {
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{ 0x00, "initiator's side" },
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{ 0x01, "responder's side" },
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{ 0x02, "called SS user's choice" },
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{ 0x03, "reserved" },
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{ 0, NULL }
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};
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static const true_false_string tfs_released_kept = { "Released", "Kept" };
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static int hf_release_token_setting = -1;
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static int hf_major_activity_token_setting = -1;
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static int hf_synchronize_minor_token_setting = -1;
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static int hf_data_token_setting = -1;
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/* calling session selector */
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static int hf_calling_session_selector = -1;
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/* called session selector */
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static int hf_called_session_selector = -1;
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/* activity id */
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static int hf_activity_identifier = -1;
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/* serial number */
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static int hf_serial_number = -1;
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/* second serial number */
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static int hf_second_serial_number = -1;
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/* second initial serial number */
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static int hf_second_initial_serial_number = -1;
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/* large initial serial number */
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static int hf_large_initial_serial_number = -1;
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/* large second initial serial number */
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static int hf_large_second_initial_serial_number = -1;
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/* Generated from convert_proto_tree_add_text.pl */
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static int hf_ses_reason_code = -1;
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static int hf_ses_transport_implementation_restriction = -1;
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static int hf_ses_transport_no_reason = -1;
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static int hf_ses_parameter_group_inside_parameter_group = -1;
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static int hf_ses_user_data = -1;
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static int hf_ses_parameter_type = -1;
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static int hf_ses_transport_protocol_error = -1;
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static int hf_ses_transport_user_abort = -1;
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static int hf_ses_parameter_length = -1;
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static int hf_ses_transport_connection = -1;
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static int hf_ses_transport_option_flags = -1;
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/* clses header fields */
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static int proto_clses = -1;
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static expert_field ei_ses_bad_length = EI_INIT;
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static expert_field ei_ses_bad_parameter_length = EI_INIT;
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#define PROTO_STRING_CLSES "ISO 9548-1 OSI Connectionless Session Protocol"
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static dissector_handle_t pres_handle = NULL;
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static reassembly_table ses_reassembly_table;
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static const fragment_items ses_frag_items = {
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/* Segment subtrees */
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&ett_ses_segment,
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&ett_ses_segments,
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/* Segment fields */
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&hf_ses_segments,
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&hf_ses_segment,
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&hf_ses_segment_overlap,
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&hf_ses_segment_overlap_conflicts,
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&hf_ses_segment_multiple_tails,
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&hf_ses_segment_too_long_segment,
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&hf_ses_segment_error,
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&hf_ses_segment_count,
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/* Reassembled in field */
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&hf_ses_reassembled_in,
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/* Reassembled length field */
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&hf_ses_reassembled_length,
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/* Reassembled data field */
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NULL,
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/* Tag */
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"SES segments"
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};
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static const value_string ses_vals[] =
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{
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{SES_DATA_TRANSFER, "DATA TRANSFER (DT) SPDU" }, /* 1 */
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{SES_PLEASE_TOKENS, "PLEASE TOKENS (PT) SPDU" }, /* 2 */
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{SES_EXPEDITED, "EXPEDITED (EX) SPDU" }, /* 5 */
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{SES_PREPARE, "PREPARE (PR) SPDU" }, /* 7 */
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{SES_NOT_FINISHED, "NOT FINISHED (NF) SPDU" }, /* 8 */
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{SES_FINISH, "FINISH (FN) SPDU" }, /* 9 */
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{SES_DISCONNECT, "DISCONNECT (DN) SPDU" }, /* 10 */
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{SES_REFUSE, "REFUSE (RF) SPDU" }, /* 12 */
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{SES_CONNECTION_REQUEST, "CONNECT (CN) SPDU" }, /* 13 */
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{SES_CONNECTION_ACCEPT, "ACCEPT (AC) SPDU" }, /* 14 */
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{SES_CONNECTION_DATA_OVERFLOW, "CONNECT DATA OVERFLOW (CDO) SPDU"}, /* 15 */
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{SES_OVERFLOW_ACCEPT, "OVERFLOW ACCEPT (OA) SPDU" }, /* 16 */
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{SES_GIVE_TOKENS_CONFIRM, "GIVE TOKENS CONFIRM (GTC) SPDU"}, /* 21 */
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{SES_GIVE_TOKENS_ACK, "GIVE TOKENS ACK (GTA) SPDU" }, /* 22 */
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{SES_ABORT, "ABORT (AB) SPDU" }, /* 25 */
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{SES_ABORT_ACCEPT, "ABORT ACCEPT (AA) SPDU" }, /* 26 */
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{SES_ACTIVITY_RESUME, "ACTIVITY RESUME (AR) SPDU" }, /* 29 */
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{SES_TYPED_DATA, "TYPED DATA (TD) SPDU" }, /* 33 */
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{SES_RESYNCHRONIZE_ACK, "RESYNCHRONIZE ACK (RA) SPDU" }, /* 34 */
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{SES_MAJOR_SYNC_POINT, "MAJOR SYNC POINT (MAP) SPDU" }, /* 41 */
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{SES_MAJOR_SYNC_ACK, "MAJOR SYNC ACK (MAA) SPDU" }, /* 42 */
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{SES_ACTIVITY_START, "ACTIVITY START (AS) SPDU" }, /* 45 */
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{SES_EXCEPTION_DATA, "EXCEPTION DATA (ED) SPDU" }, /* 48 */
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{SES_MINOR_SYNC_POINT, "MINOR SYNC POINT (MIP) SPDU" }, /* 49 */
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{SES_MINOR_SYNC_ACK, "MINOR SYNC ACK (MIA) SPDU" }, /* 50 */
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{SES_RESYNCHRONIZE, "RESYNCHRONIZE (RS) SPDU" }, /* 53 */
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{SES_ACTIVITY_DISCARD, "ACTIVITY DISCARD (AD) SPDU" }, /* 57 */
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{SES_ACTIVITY_DISCARD_ACK, "ACTIVITY DISCARD ACK (ADA) SPDU" }, /* 58 */
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{SES_CAPABILITY, "CAPABILITY DATA (CD) SPDU" }, /* 61 */
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{SES_CAPABILITY_DATA_ACK, "CAPABILITY DATA ACK (CDA) SPDU" }, /* 62 */
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{CLSES_UNIT_DATA, "UNIT DATA (UD) SPDU" }, /* 64 */
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{SES_EXCEPTION_REPORT, "EXCEPTION REPORT (ER) SPDU" }, /* 0x2000 */
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{0, NULL }
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};
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value_string_ext ses_vals_ext = VALUE_STRING_EXT_INIT(ses_vals);
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static const value_string ses_category0_vals[] =
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{
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{SES_PLEASE_TOKENS, "Please tokens PDU" },
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{SES_GIVE_TOKENS, "Give tokens PDU" },
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{0, NULL }
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};
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static const value_string param_vals[] =
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{
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{Connection_Identifier, "Connection Identifier"}, /* 1 */
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{Connect_Accept_Item, "Connect Accept Item"}, /* 5 */
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{Called_SS_user_Reference, "Called SS user Reference"}, /* 9 */
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{Calling_SS_user_Reference, "Calling SS user Reference"}, /* 10 */
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{Common_Reference, "Common Reference"}, /* 11 */
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{Additional_Reference_Information, "Additional Reference Information"}, /* 12 */
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{Sync_Type_Item, "Sync Type Item"}, /* 15 */
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{Token_Item, "Token Item"}, /* 16 */
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{Transport_Disconnect, "Transport_Disconnect"}, /* 17 */
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{Protocol_Options, "Protocol Options"}, /* 19 */
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{Session_Requirement, "Session Requirement"}, /* 20 */
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{TSDU_Maximum_Size, "TSDU Maximum Size"}, /* 21 */
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{Version_Number, "Version Number"}, /* 22 */
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{Initial_Serial_Number, "Initial Serial Number"}, /* 23 */
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{Prepare_Type, "Prepare Type"}, /* 24 */
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{EnclosureItem, "Enclosure Item"}, /* 25 */
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{Token_Setting_Item, "Token Setting Item"}, /* 26 */
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{Resync_Type, "Resync Type"}, /* 27 */
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{Linking_Information, "Linking Information"}, /* 33 */
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{Activity_Identifier, "Activity Identifier"}, /* 41 */
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{Serial_Number, "Serial Number"}, /* 42 */
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{Reflect_Parameter, "Reflect Parameter"}, /* 49 */
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{Reason_Code, "Reason Code"}, /* 50 */
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{Calling_Session_Selector, "Calling Session Selector"}, /* 51 */
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{Called_Session_Selector, "Called Session Selector"}, /* 52 */
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{Second_Resync_Type, "Second Resync Type"}, /* 53 */
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{Second_Serial_Number, "Second Serial Number"}, /* 54 */
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{Second_Initial_Serial_Number, "Second Initial Serial Number"}, /* 55 */
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{Upper_Limit_Serial_Number, "Upper Limit Serial Number"}, /* 56 */
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{Large_Initial_Serial_Number, "Large Initial Serial Number"}, /* 57 */
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{Large_Second_Initial_Serial_Number, "Large Second Initial Serial Number"}, /* 58 */
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{Data_Overflow, "Data Overflow"}, /* 60 */
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{User_Data, "Session user data"}, /* 193 */
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{Extended_User_Data, "Session extended user data"}, /* 194 */
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{0, NULL}
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};
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static value_string_ext param_vals_ext = VALUE_STRING_EXT_INIT(param_vals);
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static const value_string reason_vals[] =
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{
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{reason_not_specified, "Rejection by called SS-user; reason not specified" },
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{temporary_congestion, "Rejection by called SS-user due to temporary congestion" },
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{Subsequent, "Rejection by called SS-user." },
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{SES_DISCONNECT, "Rejection by the SPM; implementation restriction stated in the PICS" },
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{Session_Selector_unknown, "Session Selector unknown" },
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{SS_user_not_attached_to_SSAP, "SS-user not attached to SSAP" },
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{SPM_congestion_at_connect_time, "SPM congestion at connect time" },
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{versions_not_supported, "Proposed protocol versions not supported" },
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{SPM_reason_not_specified, "Rejection by the SPM; reason not specified" },
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{SPM_implementation_restriction, "Finish PDU" },
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{0, NULL }
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};
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static value_string_ext reason_vals_ext = VALUE_STRING_EXT_INIT(reason_vals);
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/* desegmentation of OSI over ses */
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static gboolean ses_desegment = TRUE;
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/* RTSE reassembly data */
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static guint ses_pres_ctx_id = 0;
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static gboolean ses_rtse_reassemble = FALSE;
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static void
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call_pres_dissector(tvbuff_t *tvb, int offset, guint16 param_len,
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packet_info *pinfo, proto_tree *tree,
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proto_tree *param_tree,
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struct SESSION_DATA_STRUCTURE *session)
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{
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/* do we have OSI presentation packet dissector ? */
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if(!pres_handle)
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{
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/* No - display as data */
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if (tree)
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{
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proto_tree_add_item(param_tree, hf_ses_user_data, tvb, offset, param_len, ENC_NA);
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}
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}
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else
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{
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/* Yes - call presentation dissector */
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tvbuff_t *next_tvb;
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next_tvb = tvb_new_subset_length(tvb, offset, param_len);
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/* Pass the session pdu to the presentation dissector */
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call_dissector_with_data(pres_handle, next_tvb, pinfo, tree, session);
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}
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}
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/* this routine returns length of parameter field, parameter group,
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or parameter */
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static int
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get_item_len(tvbuff_t *tvb, int offset, int *len_len)
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{
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guint16 len;
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len = tvb_get_guint8(tvb, offset);
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if(len == TWO_BYTE_LEN)
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{
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len = tvb_get_ntohs(tvb, offset+1);
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*len_len = 3;
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}
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else
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*len_len = 1;
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return len;
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}
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static gboolean
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dissect_parameter(tvbuff_t *tvb, int offset, proto_tree *tree,
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proto_tree *param_tree, packet_info *pinfo, guint8 param_type,
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guint16 param_len, proto_item *param_len_item, guint8 *enclosure_item_flags,
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struct SESSION_DATA_STRUCTURE *session)
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{
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gboolean has_user_information = TRUE;
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guint16 flags;
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asn1_ctx_t asn1_ctx;
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static const int * item_option_flags[] = {
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&hf_release_token,
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&hf_major_activity_token,
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&hf_synchronize_minor_token,
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&hf_data_token,
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NULL
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};
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static const int * transport_option_flags[] = {
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&hf_ses_transport_connection,
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&hf_ses_transport_user_abort,
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&hf_ses_transport_protocol_error,
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&hf_ses_transport_no_reason,
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&hf_ses_transport_implementation_restriction,
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NULL
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};
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static const int * protocol_options_flags[] = {
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&hf_able_to_receive_extended_concatenated_SPDU,
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NULL
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};
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static const int * req_options_flags[] = {
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&hf_session_exception_report,
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&hf_data_separation_function_unit,
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&hf_symmetric_synchronize_function_unit,
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&hf_typed_data_function_unit,
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&hf_exception_function_unit,
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&hf_capability_function_unit,
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&hf_negotiated_release_function_unit,
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&hf_activity_management_function_unit,
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&hf_resynchronize_function_unit,
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&hf_major_resynchronize_function_unit,
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&hf_minor_resynchronize_function_unit,
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&hf_expedited_data_resynchronize_function_unit,
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&hf_duplex_function_unit,
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&hf_half_duplex_function_unit,
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NULL
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};
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static const int * version_flags[] = {
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&hf_protocol_version_2,
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&hf_protocol_version_1,
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NULL
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};
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static const int * enclosure_flags[] = {
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&hf_end_of_SSDU,
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&hf_beginning_of_SSDU,
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NULL
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};
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asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
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switch (param_type)
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{
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case Called_SS_user_Reference:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_called_ss_user_reference,
|
|
tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
case Calling_SS_user_Reference:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_calling_ss_user_reference,
|
|
tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
case Common_Reference:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_common_reference,
|
|
tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
case Additional_Reference_Information:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_additional_reference_information,
|
|
tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
case Token_Item:
|
|
if (param_len != 1)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 1", param_len);
|
|
break;
|
|
}
|
|
|
|
proto_tree_add_bitmask(param_tree, tvb, offset, hf_token_item_options_flags, ett_token_item_flags, item_option_flags, ENC_NA);
|
|
break;
|
|
|
|
case Transport_Disconnect:
|
|
if (param_len != 1)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 1", param_len);
|
|
break;
|
|
}
|
|
proto_tree_add_bitmask(param_tree, tvb, offset, hf_ses_transport_option_flags, ett_transport_options_flags, transport_option_flags, ENC_NA);
|
|
|
|
if(tvb_get_guint8(tvb, offset) & user_abort )
|
|
{
|
|
session->abort_type = SESSION_USER_ABORT;
|
|
}
|
|
else
|
|
{
|
|
session->abort_type = SESSION_PROVIDER_ABORT;
|
|
}
|
|
break;
|
|
|
|
case Protocol_Options:
|
|
if (param_len != 1)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 1", param_len);
|
|
break;
|
|
}
|
|
|
|
proto_tree_add_bitmask(param_tree, tvb, offset, hf_connect_protocol_options_flags, ett_connect_protocol_options_flags, protocol_options_flags, ENC_NA);
|
|
break;
|
|
|
|
case Session_Requirement:
|
|
if (param_len != 2)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 2", param_len);
|
|
break;
|
|
}
|
|
proto_tree_add_bitmask(param_tree, tvb, offset, hf_session_user_req_flags, ett_ses_req_options_flags, req_options_flags, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case TSDU_Maximum_Size:
|
|
if (param_len != 4)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 4", param_len);
|
|
break;
|
|
}
|
|
if (tree)
|
|
{
|
|
proto_tree_add_item(param_tree,
|
|
hf_proposed_tsdu_maximum_size_i2r,
|
|
tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(param_tree,
|
|
hf_proposed_tsdu_maximum_size_r2i,
|
|
tvb, offset+2, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
break;
|
|
|
|
case Version_Number:
|
|
if (param_len != 1)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 1", param_len);
|
|
break;
|
|
}
|
|
proto_tree_add_bitmask(param_tree, tvb, offset, hf_version_number_options_flags, ett_protocol_version_flags, version_flags, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case Initial_Serial_Number:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_initial_serial_number,
|
|
tvb, offset, param_len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
case EnclosureItem:
|
|
if (param_len != 1)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 1", param_len);
|
|
break;
|
|
}
|
|
flags = tvb_get_guint8(tvb, offset);
|
|
*enclosure_item_flags = (guint8) flags;
|
|
proto_tree_add_bitmask(param_tree, tvb, offset, hf_enclosure_item_options_flags, ett_enclosure_item_flags, enclosure_flags, ENC_BIG_ENDIAN);
|
|
|
|
if (flags & END_SPDU) {
|
|
/*
|
|
* In Data Transfer and Typed Data SPDUs, (X.225: 8.3.{11,13}.4)
|
|
* "The User Information Field shall be present
|
|
* if the Enclosure Item is not present, or has
|
|
* bit 2 = 0", which presumably means it shall
|
|
* *not* be present if the Enclosure item *is*
|
|
* present and has bit 2 = 1.
|
|
*/
|
|
|
|
if(!(flags & BEGINNING_SPDU)) {
|
|
/* X.225 7.11.2 also states:
|
|
* "All DATA TRANSFER SPDUs, except the last DATA TRANSFER SPDU in a sequence greater than one, must have user information"
|
|
* So if BEGINNING_SPDU and END_SPDU are set in the enclosure item, then this is presumably a sequence of one and
|
|
* consequently there must be user information.
|
|
*
|
|
* So, there is only no user information if *only* END_SPDU is set.
|
|
*/
|
|
|
|
has_user_information = FALSE;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Token_Setting_Item:
|
|
if (param_len != 1)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be 1", param_len);
|
|
break;
|
|
}
|
|
if (tree)
|
|
{
|
|
proto_tree_add_item(param_tree,
|
|
hf_release_token_setting,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(param_tree,
|
|
hf_major_activity_token_setting,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(param_tree,
|
|
hf_synchronize_minor_token_setting,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(param_tree,
|
|
hf_data_token_setting,
|
|
tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
break;
|
|
|
|
case Activity_Identifier:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
/* 8.3.29.2 The parameter fields shall be as specified in Table 37.
|
|
* Activity Identifier m 41 6 octets maximum
|
|
*/
|
|
proto_tree_add_item(param_tree,
|
|
hf_activity_identifier,
|
|
tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
case Serial_Number:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_serial_number,
|
|
tvb, offset, param_len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
case Reason_Code:
|
|
/*
|
|
0: Rejection by called SS-user; reason not specified.
|
|
1: Rejection by called SS-user due to temporary congestion.
|
|
2: Rejection by called SS-user. Subsequent octets may be used for user data
|
|
up to a length of 512 octets if Protocol Version 1 has been selected, and up
|
|
to a length such that the total length (including SI and LI) of the SPDU
|
|
does not exceed 65 539 octets if Protocol Version 2 has been selected.
|
|
128 + 1: Session Selector unknown.
|
|
128 + 2: SS-user not attached to SSAP.
|
|
128 + 3: SPM congestion at connect time.
|
|
128 + 4: Proposed protocol versions not supported.
|
|
128 + 5: Rejection by the SPM; reason not specified.
|
|
128 + 6: Rejection by the SPM; implementation restriction stated in the
|
|
PICS. */
|
|
if (param_len < 1)
|
|
{
|
|
expert_add_info_format(pinfo, param_len_item, &ei_ses_bad_length,
|
|
"Length is %u, should be >= 1", param_len);
|
|
break;
|
|
}
|
|
|
|
proto_tree_add_item(param_tree, hf_ses_reason_code, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
param_len--;
|
|
if (param_len != 0)
|
|
{
|
|
call_pres_dissector(tvb, offset, param_len,
|
|
pinfo, tree, param_tree, session);
|
|
}
|
|
break;
|
|
|
|
case Calling_Session_Selector:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_calling_session_selector,
|
|
tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
case Called_Session_Selector:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_called_session_selector,
|
|
tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
case Second_Serial_Number:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_second_serial_number,
|
|
tvb, offset, param_len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
case Second_Initial_Serial_Number:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_second_initial_serial_number,
|
|
tvb, offset, param_len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
case Large_Initial_Serial_Number:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_large_initial_serial_number,
|
|
tvb, offset, param_len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
case Large_Second_Initial_Serial_Number:
|
|
if (param_len == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(param_tree,
|
|
hf_large_second_initial_serial_number,
|
|
tvb, offset, param_len, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return has_user_information;
|
|
}
|
|
|
|
static gboolean
|
|
dissect_parameter_group(tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
proto_tree *pg_tree, packet_info *pinfo, guint16 pg_len,
|
|
guint8 *enclosure_item_flags, struct SESSION_DATA_STRUCTURE *session)
|
|
{
|
|
gboolean has_user_information = TRUE;
|
|
proto_item *ti, *param_len_item;
|
|
proto_tree *param_tree;
|
|
guint8 param_type;
|
|
const char *param_str;
|
|
int len_len;
|
|
guint16 param_len;
|
|
|
|
while(pg_len != 0)
|
|
{
|
|
param_type = tvb_get_guint8(tvb, offset);
|
|
param_tree = proto_tree_add_subtree(pg_tree, tvb, offset, -1,
|
|
ett_ses_param, &ti,
|
|
val_to_str_ext(param_type, ¶m_vals_ext, "Unknown parameter type (0x%02x)"));
|
|
param_str = val_to_str_ext_const(param_type, ¶m_vals_ext, "Unknown");
|
|
proto_tree_add_item(param_tree, hf_ses_parameter_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
pg_len--;
|
|
param_len = get_item_len(tvb, offset, &len_len);
|
|
if (len_len > pg_len) {
|
|
proto_item_set_len(ti, pg_len + 1);
|
|
proto_tree_add_expert_format(param_tree, pinfo, &ei_ses_bad_parameter_length, tvb, offset, pg_len, "Parameter length doesn't fit in parameter");
|
|
return has_user_information;
|
|
}
|
|
pg_len -= len_len;
|
|
if (param_len > pg_len) {
|
|
proto_item_set_len(ti, pg_len + 1 + len_len);
|
|
proto_tree_add_expert_format(param_tree, pinfo, &ei_ses_bad_parameter_length, tvb, offset, pg_len, "Parameter length: %u, should be <= %u", param_len, pg_len);
|
|
return has_user_information;
|
|
}
|
|
proto_item_set_len(ti, 1 + len_len + param_len);
|
|
param_len_item = proto_tree_add_uint(param_tree, hf_ses_parameter_length, tvb, offset, len_len, param_len);
|
|
offset += len_len;
|
|
|
|
if (param_str != NULL)
|
|
{
|
|
switch(param_type)
|
|
{
|
|
/* PG's in PG's are invalid, presumably */
|
|
case Extended_User_Data:
|
|
case User_Data:
|
|
case Connect_Accept_Item:
|
|
case Connection_Identifier:
|
|
case Linking_Information:
|
|
proto_tree_add_item(param_tree, hf_ses_parameter_group_inside_parameter_group, tvb, offset, param_len, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
if (!dissect_parameter(tvb, offset, tree,
|
|
param_tree, pinfo, param_type, param_len, param_len_item,
|
|
enclosure_item_flags, session))
|
|
has_user_information = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
offset += param_len;
|
|
pg_len -= param_len;
|
|
}
|
|
return has_user_information;
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if there's a User Information field in this SPDU, FALSE
|
|
* otherwise.
|
|
*/
|
|
static gboolean
|
|
dissect_parameters(tvbuff_t *tvb, int offset, guint16 len, proto_tree *tree,
|
|
proto_tree *ses_tree, packet_info *pinfo,
|
|
guint8 *enclosure_item_flags, struct SESSION_DATA_STRUCTURE *session)
|
|
{
|
|
gboolean has_user_information = TRUE;
|
|
proto_item *ti, *param_len_item;
|
|
proto_tree *param_tree;
|
|
guint8 param_type;
|
|
const char *param_str;
|
|
int len_len;
|
|
guint16 param_len;
|
|
|
|
while (len != 0)
|
|
{
|
|
param_type = tvb_get_guint8(tvb, offset);
|
|
param_tree = proto_tree_add_subtree(ses_tree, tvb, offset, -1, ett_ses_param, &ti,
|
|
val_to_str_ext(param_type, ¶m_vals_ext,
|
|
"Unknown parameter type (0x%02x)"));
|
|
param_str = val_to_str_ext_const(param_type, ¶m_vals_ext, "Unknown");
|
|
proto_tree_add_item(param_tree, hf_ses_parameter_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset++;
|
|
len--;
|
|
param_len = get_item_len(tvb, offset, &len_len);
|
|
if (len_len > len) {
|
|
proto_item_set_len(ti, len + 1 );
|
|
proto_tree_add_expert_format(param_tree, pinfo, &ei_ses_bad_parameter_length, tvb, offset, len, "Parameter length doesn't fit in parameter");
|
|
return has_user_information;
|
|
}
|
|
len -= len_len;
|
|
if (param_len > len) {
|
|
proto_item_set_len(ti, len + 1 + len_len);
|
|
proto_tree_add_expert_format(param_tree, pinfo, &ei_ses_bad_parameter_length, tvb, offset, len, "Parameter length: %u, should be <= %u", param_len, len);
|
|
return has_user_information;
|
|
}
|
|
proto_item_set_len(ti, 1 + len_len + param_len);
|
|
param_len_item = proto_tree_add_uint(param_tree, hf_ses_parameter_length, tvb, offset, len_len, param_len);
|
|
offset += len_len;
|
|
|
|
if (param_str != NULL)
|
|
{
|
|
switch(param_type)
|
|
{
|
|
case Extended_User_Data:
|
|
call_pres_dissector(tvb, offset, param_len,
|
|
pinfo, tree, param_tree, session);
|
|
break;
|
|
|
|
case User_Data:
|
|
call_pres_dissector(tvb, offset, param_len,
|
|
pinfo, tree, param_tree, session);
|
|
break;
|
|
|
|
/* handle PGI's */
|
|
case Connect_Accept_Item:
|
|
case Connection_Identifier:
|
|
case Linking_Information:
|
|
/* Yes. */
|
|
if (!dissect_parameter_group(tvb, offset, tree,
|
|
param_tree, pinfo, param_len, enclosure_item_flags, session))
|
|
has_user_information = FALSE;
|
|
break;
|
|
|
|
/* everything else is a PI */
|
|
default:
|
|
if (!dissect_parameter(tvb, offset, tree,
|
|
param_tree, pinfo, param_type, param_len, param_len_item,
|
|
enclosure_item_flags, session))
|
|
has_user_information = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
offset += param_len;
|
|
len -= param_len;
|
|
}
|
|
return has_user_information;
|
|
}
|
|
|
|
/*
|
|
* Dissect an SPDU.
|
|
*/
|
|
static int
|
|
dissect_spdu(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree,
|
|
gboolean tokens, gboolean connectionless)
|
|
{
|
|
gboolean has_user_information = FALSE;
|
|
guint8 type;
|
|
proto_item *ti = NULL;
|
|
proto_tree *ses_tree = NULL;
|
|
int len_len;
|
|
guint16 parameters_len;
|
|
tvbuff_t *next_tvb = NULL;
|
|
guint32 *pres_ctx_id = NULL;
|
|
guint8 enclosure_item_flags = BEGINNING_SPDU|END_SPDU;
|
|
struct SESSION_DATA_STRUCTURE session;
|
|
|
|
/*
|
|
* Get SPDU type.
|
|
*/
|
|
type = tvb_get_guint8(tvb, offset);
|
|
session.spdu_type = type;
|
|
session.abort_type = SESSION_NO_ABORT;
|
|
session.pres_ctx_id = 0;
|
|
session.ros_op = 0;
|
|
session.rtse_reassemble = FALSE;
|
|
|
|
if(connectionless) {
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str_ext(type, &ses_vals_ext, "Unknown SPDU type (0x%02x)"));
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_clses, tvb, offset,
|
|
-1, ENC_NA);
|
|
ses_tree = proto_item_add_subtree(ti, ett_ses);
|
|
proto_tree_add_uint(ses_tree, hf_ses_type, tvb,
|
|
offset, 1, type);
|
|
}
|
|
has_user_information = TRUE;
|
|
}
|
|
else if (tokens) {
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str(type, ses_category0_vals, "Unknown SPDU type (0x%02x)"));
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_ses, tvb, offset,
|
|
-1, ENC_NA);
|
|
ses_tree = proto_item_add_subtree(ti, ett_ses);
|
|
proto_tree_add_uint(ses_tree, hf_ses_type_0, tvb,
|
|
offset, 1, type);
|
|
}
|
|
} else {
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str_ext(type, &ses_vals_ext, "Unknown SPDU type (0x%02x)"));
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_ses, tvb, offset,
|
|
-1, ENC_NA);
|
|
ses_tree = proto_item_add_subtree(ti, ett_ses);
|
|
proto_tree_add_uint(ses_tree, hf_ses_type, tvb,
|
|
offset, 1, type);
|
|
}
|
|
|
|
/*
|
|
* Might this SPDU have a User Information field?
|
|
*/
|
|
switch (type) {
|
|
case SES_DATA_TRANSFER:
|
|
case SES_EXPEDITED:
|
|
case SES_TYPED_DATA:
|
|
has_user_information = TRUE;
|
|
break;
|
|
case SES_MAJOR_SYNC_POINT:
|
|
pres_ctx_id = (guint32 *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ses, 0);
|
|
if (ses_rtse_reassemble != 0 && !pres_ctx_id) {
|
|
/* First time visited - save pres_ctx_id */
|
|
pres_ctx_id = wmem_new(wmem_file_scope(), guint32);
|
|
*pres_ctx_id = ses_pres_ctx_id;
|
|
p_add_proto_data(wmem_file_scope(), pinfo, proto_ses, 0, pres_ctx_id);
|
|
}
|
|
if (pres_ctx_id) {
|
|
session.pres_ctx_id = *pres_ctx_id;
|
|
session.rtse_reassemble = TRUE;
|
|
has_user_information = TRUE;
|
|
}
|
|
ses_rtse_reassemble = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
offset++;
|
|
|
|
/* get length of SPDU parameter field */
|
|
parameters_len = get_item_len(tvb, offset, &len_len);
|
|
if (tree)
|
|
proto_tree_add_uint(ses_tree, hf_ses_length, tvb, offset,
|
|
len_len, parameters_len);
|
|
offset += len_len;
|
|
|
|
/* Dissect parameters. */
|
|
if (!dissect_parameters(tvb, offset, parameters_len, tree, ses_tree,
|
|
pinfo, &enclosure_item_flags, &session))
|
|
has_user_information = FALSE;
|
|
offset += parameters_len;
|
|
|
|
proto_item_set_end(ti, tvb, offset);
|
|
|
|
/* Dissect user information, if present */
|
|
if (!ses_desegment || enclosure_item_flags == (BEGINNING_SPDU|END_SPDU)) {
|
|
if (has_user_information) {
|
|
/* Not desegment or only one segment */
|
|
if (tvb_reported_length_remaining(tvb, offset) > 0 || type == SES_MAJOR_SYNC_POINT) {
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
}
|
|
}
|
|
} else {
|
|
conversation_t *conversation = NULL;
|
|
fragment_head *frag_msg = NULL;
|
|
gint fragment_len;
|
|
guint32 ses_id = 0;
|
|
|
|
/* Use conversation index as segment id */
|
|
conversation = find_conversation_pinfo(pinfo, 0);
|
|
if (conversation != NULL) {
|
|
ses_id = conversation->conv_index;
|
|
}
|
|
fragment_len = tvb_reported_length_remaining (tvb, offset);
|
|
ti = proto_tree_add_item (ses_tree, hf_ses_segment_data, tvb, offset,
|
|
fragment_len, ENC_NA);
|
|
proto_item_append_text (ti, " (%d byte%s)", fragment_len, plurality (fragment_len, "", "s"));
|
|
frag_msg = fragment_add_seq_next (&ses_reassembly_table,
|
|
tvb, offset,
|
|
pinfo, ses_id, NULL,
|
|
fragment_len,
|
|
(enclosure_item_flags & END_SPDU) ? FALSE : TRUE);
|
|
next_tvb = process_reassembled_data (tvb, offset, pinfo, "Reassembled SES",
|
|
frag_msg, &ses_frag_items, NULL,
|
|
(enclosure_item_flags & END_SPDU) ? tree : ses_tree);
|
|
|
|
has_user_information = TRUE;
|
|
offset += fragment_len;
|
|
}
|
|
|
|
if (has_user_information && next_tvb) {
|
|
if (!pres_handle) {
|
|
call_data_dissector(next_tvb, pinfo, tree);
|
|
} else {
|
|
/* Pass the session pdu to the presentation dissector */
|
|
call_dissector_with_data(pres_handle, next_tvb, pinfo, tree, &session);
|
|
}
|
|
|
|
/*
|
|
* No more SPDUs to dissect. Set the offset to the
|
|
* end of the tvbuff.
|
|
*/
|
|
offset = tvb_captured_length(tvb);
|
|
if (session.rtse_reassemble && type == SES_DATA_TRANSFER) {
|
|
ses_pres_ctx_id = session.pres_ctx_id;
|
|
ses_rtse_reassemble = TRUE;
|
|
}
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
/*
|
|
* Dissect SPDUs inside a TSDU.
|
|
*/
|
|
static int
|
|
dissect_ses(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
int offset = 0;
|
|
guint8 type;
|
|
gboolean is_clsp = FALSE;
|
|
|
|
type = tvb_get_guint8(tvb, offset);
|
|
if(type == CLSES_UNIT_DATA)
|
|
is_clsp = TRUE;
|
|
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, is_clsp ? "CLSES" : "SES");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
|
|
/*
|
|
* Do we have a category 0 SPDU (GIVE_TOKENS/PLEASE_TOKENS) as
|
|
* the first SPDU?
|
|
*
|
|
* If so, dissect it as such (GIVE_TOKENS and DATA_TRANSFER have
|
|
* the same SPDU type value).
|
|
*/
|
|
if ((type == SES_PLEASE_TOKENS) || (type == SES_GIVE_TOKENS))
|
|
offset = dissect_spdu(tvb, offset, pinfo, tree, TOKENS_SPDU, FALSE);
|
|
|
|
|
|
/* Dissect the remaining SPDUs. */
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0)
|
|
offset = dissect_spdu(tvb, offset, pinfo, tree, NON_TOKENS_SPDU, is_clsp);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_ses_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void *data _U_)
|
|
{
|
|
/* must check that this really is a ses packet */
|
|
int offset = 0;
|
|
guint8 type;
|
|
int len_len;
|
|
guint16 len;
|
|
|
|
/* first, check do we have at least 4 bytes (type+length) */
|
|
if (tvb_captured_length(tvb) < 2)
|
|
return FALSE; /* no */
|
|
|
|
/* can we recognize session PDU ? Return FALSE if not */
|
|
/* get SPDU type */
|
|
type = tvb_get_guint8(tvb, offset);
|
|
/* check SPDU type */
|
|
if (try_val_to_str_ext(type, &ses_vals_ext) == NULL)
|
|
{
|
|
return FALSE; /* no, it isn't a session PDU */
|
|
}
|
|
|
|
/* can we recognize the second session PDU if the first one was
|
|
* a Give Tokens PDU? Return FALSE if not */
|
|
if(tvb_bytes_exist(tvb, 2, 2) && type == SES_GIVE_TOKENS) {
|
|
/* get SPDU type */
|
|
type = tvb_get_guint8(tvb, offset+2);
|
|
/* check SPDU type */
|
|
if (try_val_to_str_ext(type, &ses_vals_ext) == NULL)
|
|
{
|
|
return FALSE; /* no, it isn't a session PDU */
|
|
}
|
|
}
|
|
|
|
/* some Siemens SIMATIC protocols also use COTP, and shouldn't be
|
|
* misinterpreted as SES.
|
|
* the starter in this case is fixed to 0x32 (SES_MINOR_SYNC_ACK for SES),
|
|
* so if the parameter type is unknown, it's probably SIMATIC */
|
|
if(type == 0x32 && tvb_captured_length(tvb) >= 3) {
|
|
type = tvb_get_guint8(tvb, offset+2);
|
|
if (try_val_to_str_ext(type, ¶m_vals_ext) == NULL) {
|
|
return FALSE; /* it's probably a SIMATIC protocol */
|
|
}
|
|
}
|
|
|
|
/* OK,let's check SPDU length */
|
|
/* get length of SPDU */
|
|
len = get_item_len(tvb, offset+1, &len_len);
|
|
|
|
/* add header length */
|
|
len+=len_len;
|
|
/* do we have enough bytes ? */
|
|
if (tvb_reported_length(tvb) < len)
|
|
return FALSE; /* no */
|
|
|
|
/* final check to see if the next SPDU, if present, is also valid */
|
|
if (tvb_captured_length(tvb) > 1+(guint) len) {
|
|
type = tvb_get_guint8(tvb, offset + len + 1);
|
|
/* check SPDU type */
|
|
if (try_val_to_str_ext(type, &ses_vals_ext) == NULL) {
|
|
return FALSE; /* no, it isn't a session PDU */
|
|
}
|
|
}
|
|
|
|
dissect_ses(tvb, pinfo, parent_tree, data);
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
proto_register_ses(void)
|
|
{
|
|
static hf_register_info hf[] =
|
|
{
|
|
{
|
|
&hf_ses_type,
|
|
{
|
|
"SPDU Type",
|
|
"ses.type",
|
|
FT_UINT8,
|
|
BASE_DEC | BASE_EXT_STRING,
|
|
&ses_vals_ext,
|
|
0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_ses_type_0,
|
|
{
|
|
"SPDU Type",
|
|
"ses.type",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(ses_category0_vals),
|
|
0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_ses_length,
|
|
{
|
|
"Length",
|
|
"ses.length",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
|
|
#if 0
|
|
{
|
|
&hf_ses_version,
|
|
{
|
|
"Version",
|
|
"ses.version",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
#endif
|
|
#if 0
|
|
{
|
|
&hf_ses_reserved,
|
|
{
|
|
"Reserved",
|
|
"ses.reserved",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
#endif
|
|
{
|
|
&hf_called_ss_user_reference,
|
|
{
|
|
"Called SS User Reference",
|
|
"ses.called_ss_user_reference",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_calling_ss_user_reference,
|
|
{
|
|
"Calling SS User Reference",
|
|
"ses.calling_ss_user_reference",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_common_reference,
|
|
{
|
|
"Common Reference",
|
|
"ses.common_reference",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_additional_reference_information,
|
|
{
|
|
"Additional Reference Information",
|
|
"ses.additional_reference_information",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_release_token,
|
|
{
|
|
"release token",
|
|
"ses.release_token",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
RELEASE_TOKEN,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_major_activity_token,
|
|
{
|
|
"major/activity token",
|
|
"ses.major.token",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
MAJOR_ACTIVITY_TOKEN,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_synchronize_minor_token,
|
|
{
|
|
"synchronize minor token",
|
|
"ses.synchronize_token",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
SYNCHRONIZE_MINOR_TOKEN,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_data_token,
|
|
{
|
|
"data token",
|
|
"ses.data_token",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
DATA_TOKEN,
|
|
"data token",
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_able_to_receive_extended_concatenated_SPDU,
|
|
{
|
|
"Able to receive extended concatenated SPDU",
|
|
"ses.connect.f1",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
SES_EXT_CONT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_session_user_req_flags,
|
|
{
|
|
"Flags",
|
|
"ses.req.flags",
|
|
FT_UINT16,
|
|
BASE_HEX,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_session_exception_report,
|
|
{
|
|
"Session exception report",
|
|
"ses.exception_report",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
SES_EXCEPTION_REPORT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_data_separation_function_unit,
|
|
{
|
|
"Data separation function unit",
|
|
"ses.data_sep",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
DATA_SEPARATION_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_symmetric_synchronize_function_unit,
|
|
{
|
|
"Symmetric synchronize function unit",
|
|
"ses.symm_sync",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
SYMMETRIC_SYNCHRONIZE_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_typed_data_function_unit,
|
|
{
|
|
"Typed data function unit",
|
|
"ses.typed_data",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
TYPED_DATA_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_exception_function_unit,
|
|
{
|
|
"Exception function unit",
|
|
"ses.exception_data",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
EXCEPTION_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_capability_function_unit,
|
|
{
|
|
"Capability function unit",
|
|
"ses.capability_data",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
CAPABILITY_DATA_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_negotiated_release_function_unit,
|
|
{
|
|
"Negotiated release function unit",
|
|
"ses.negotiated_release",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
NEGOTIATED_RELEASE_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_activity_management_function_unit,
|
|
{
|
|
"Activity management function unit",
|
|
"ses.activity_management",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
ACTIVITY_MANAGEMENT_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_resynchronize_function_unit,
|
|
{
|
|
"Resynchronize function unit",
|
|
"ses.resynchronize",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
RESYNCHRONIZE_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_major_resynchronize_function_unit,
|
|
{
|
|
"Major resynchronize function unit",
|
|
"ses.major_resynchronize",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
MAJOR_SYNCHRONIZE_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_minor_resynchronize_function_unit,
|
|
{
|
|
"Minor resynchronize function unit",
|
|
"ses.minor_resynchronize",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
MINOR_SYNCHRONIZE_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_expedited_data_resynchronize_function_unit,
|
|
{
|
|
"Expedited data function unit",
|
|
"ses.expedited_data",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
EXPEDITED_DATA_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_duplex_function_unit,
|
|
{
|
|
"Duplex functional unit",
|
|
"ses.duplex",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
DUPLEX_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_half_duplex_function_unit,
|
|
{
|
|
"Half-duplex functional unit",
|
|
"ses.half_duplex",
|
|
FT_BOOLEAN, 16,
|
|
NULL,
|
|
HALF_DUPLEX_FUNCTION_UNIT,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_proposed_tsdu_maximum_size_i2r,
|
|
{
|
|
"Proposed TSDU Maximum Size, Initiator to Responder",
|
|
"ses.proposed_tsdu_maximum_size_i2r",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_proposed_tsdu_maximum_size_r2i,
|
|
{
|
|
"Proposed TSDU Maximum Size, Responder to Initiator",
|
|
"ses.proposed_tsdu_maximum_size_r2i",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_protocol_version_1,
|
|
{
|
|
"Protocol Version 1",
|
|
"ses.protocol_version1",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
PROTOCOL_VERSION_1,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_protocol_version_2,
|
|
{
|
|
"Protocol Version 2",
|
|
"ses.protocol_version2",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
PROTOCOL_VERSION_2,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_initial_serial_number,
|
|
{
|
|
"Initial Serial Number",
|
|
"ses.initial_serial_number",
|
|
FT_STRING, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_beginning_of_SSDU,
|
|
{
|
|
"beginning of SSDU",
|
|
"ses.beginning_of_SSDU",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
BEGINNING_SPDU,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_end_of_SSDU,
|
|
{
|
|
"end of SSDU",
|
|
"ses.end_of_SSDU",
|
|
FT_BOOLEAN, 8,
|
|
NULL,
|
|
END_SPDU,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_release_token_setting,
|
|
{
|
|
"release token setting",
|
|
"ses.release_token_setting",
|
|
FT_UINT8, BASE_HEX,
|
|
VALS(token_setting_vals),
|
|
0xC0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_major_activity_token_setting,
|
|
{
|
|
"major/activity setting",
|
|
"ses.major_activity_token_setting",
|
|
FT_UINT8, BASE_HEX,
|
|
VALS(token_setting_vals),
|
|
0x30,
|
|
"major/activity token setting",
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_synchronize_minor_token_setting,
|
|
{
|
|
"synchronize-minor token setting",
|
|
"ses.synchronize_minor_token_setting",
|
|
FT_UINT8, BASE_HEX,
|
|
VALS(token_setting_vals),
|
|
0x0C,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_data_token_setting,
|
|
{
|
|
"data token setting",
|
|
"ses.data_token_setting",
|
|
FT_UINT8, BASE_HEX,
|
|
VALS(token_setting_vals),
|
|
0x03,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_activity_identifier,
|
|
{
|
|
"Activity Identifier",
|
|
"ses.activity_identifier",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_serial_number,
|
|
{
|
|
"Serial Number",
|
|
"ses.serial_number",
|
|
FT_STRING, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_calling_session_selector,
|
|
{
|
|
"Calling Session Selector",
|
|
"ses.calling_session_selector",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_called_session_selector,
|
|
{
|
|
"Called Session Selector",
|
|
"ses.called_session_selector",
|
|
FT_BYTES, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_second_serial_number,
|
|
{
|
|
"Second Serial Number",
|
|
"ses.second_serial_number",
|
|
FT_STRING, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_second_initial_serial_number,
|
|
{
|
|
"Second Initial Serial Number",
|
|
"ses.second_initial_serial_number",
|
|
FT_STRING, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_large_initial_serial_number,
|
|
{
|
|
"Large Initial Serial Number",
|
|
"ses.large_initial_serial_number",
|
|
FT_STRING, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_large_second_initial_serial_number,
|
|
{
|
|
"Large Second Initial Serial Number",
|
|
"ses.large_second_initial_serial_number",
|
|
FT_STRING, BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_connect_protocol_options_flags,
|
|
{
|
|
"Flags",
|
|
"ses.connect.flags",
|
|
FT_UINT8,
|
|
BASE_HEX,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_version_number_options_flags,
|
|
|
|
{
|
|
"Flags",
|
|
"ses.version.flags",
|
|
FT_UINT8,
|
|
BASE_HEX,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_token_item_options_flags,
|
|
|
|
{
|
|
"Flags",
|
|
"ses.tken_item.flags",
|
|
FT_UINT8,
|
|
BASE_HEX,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_enclosure_item_options_flags,
|
|
|
|
{
|
|
"Flags",
|
|
"ses.enclosure.flags",
|
|
FT_UINT8,
|
|
BASE_HEX,
|
|
NULL,
|
|
0x0,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_ses_segment_data,
|
|
{ "SES segment data", "ses.segment.data", FT_NONE, BASE_NONE,
|
|
NULL, 0x00, NULL, HFILL } },
|
|
{ &hf_ses_segments,
|
|
{ "SES segments", "ses.segments", FT_NONE, BASE_NONE,
|
|
NULL, 0x00, NULL, HFILL } },
|
|
{ &hf_ses_segment,
|
|
{ "SES segment", "ses.segment", FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0x00, NULL, HFILL } },
|
|
{ &hf_ses_segment_overlap,
|
|
{ "SES segment overlap", "ses.segment.overlap", FT_BOOLEAN,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_ses_segment_overlap_conflicts,
|
|
{ "SES segment overlapping with conflicting data",
|
|
"ses.segment.overlap.conflicts", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_ses_segment_multiple_tails,
|
|
{ "SES has multiple tail segments",
|
|
"ses.segment.multiple_tails", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_ses_segment_too_long_segment,
|
|
{ "SES segment too long", "ses.segment.too_long_segment",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } },
|
|
{ &hf_ses_segment_error,
|
|
{ "SES desegmentation error", "ses.segment.error", FT_FRAMENUM,
|
|
BASE_NONE, NULL, 0x00, NULL, HFILL } },
|
|
{ &hf_ses_segment_count,
|
|
{ "SES segment count", "ses.segment.count", FT_UINT32, BASE_DEC,
|
|
NULL, 0x00, NULL, HFILL } },
|
|
{ &hf_ses_reassembled_in,
|
|
{ "Reassembled SES in frame", "ses.reassembled.in", FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0x00, "This SES packet is reassembled in this frame", HFILL } },
|
|
{ &hf_ses_reassembled_length,
|
|
{ "Reassembled SES length", "ses.reassembled.length", FT_UINT32, BASE_DEC,
|
|
NULL, 0x00, "The total length of the reassembled payload", HFILL } },
|
|
|
|
/* Generated from convert_proto_tree_add_text.pl */
|
|
{ &hf_ses_user_data, { "User data", "ses.user_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_ses_transport_option_flags, { "Flags", "ses.transport_flags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_ses_transport_connection, { "Transport connection", "ses.transport_flags.connection", FT_BOOLEAN, 8, TFS(&tfs_released_kept), transport_connection_is_released, NULL, HFILL }},
|
|
{ &hf_ses_transport_user_abort, { "User abort", "ses.transport_flags.user_abort", FT_BOOLEAN, 8, TFS(&tfs_yes_no), user_abort, NULL, HFILL }},
|
|
{ &hf_ses_transport_protocol_error, { "Protocol error", "ses.transport_flags.protocol_error", FT_BOOLEAN, 8, TFS(&tfs_yes_no), protocol_error, NULL, HFILL }},
|
|
{ &hf_ses_transport_no_reason, { "No reason", "ses.transport_flags.no_reason", FT_BOOLEAN, 8, TFS(&tfs_yes_no), no_reason, NULL, HFILL }},
|
|
{ &hf_ses_transport_implementation_restriction, { "Implementation restriction", "ses.transport_flags.implementation_restriction", FT_BOOLEAN, 8, TFS(&tfs_yes_no), implementation_restriction, NULL, HFILL }},
|
|
{ &hf_ses_reason_code, { "Reason Code", "ses.reason_code", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &reason_vals_ext, 0x0, NULL, HFILL }},
|
|
{ &hf_ses_parameter_type, { "Parameter type", "ses.parameter_type", FT_UINT8, BASE_DEC|BASE_EXT_STRING, ¶m_vals_ext, 0x0, NULL, HFILL }},
|
|
{ &hf_ses_parameter_length, { "Parameter length", "ses.parameter_length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_ses_parameter_group_inside_parameter_group, { "Parameter group inside parameter group", "ses.parameter_group_inside_parameter_group", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
};
|
|
|
|
static gint *ett[] =
|
|
{
|
|
&ett_ses,
|
|
&ett_ses_param,
|
|
&ett_connect_protocol_options_flags,
|
|
&ett_transport_options_flags,
|
|
&ett_protocol_version_flags,
|
|
&ett_enclosure_item_flags,
|
|
&ett_token_item_flags,
|
|
&ett_ses_req_options_flags,
|
|
&ett_ses_segment,
|
|
&ett_ses_segments
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_ses_bad_length, { "ses.bad_length", PI_MALFORMED, PI_ERROR, "Bad length", EXPFILL }},
|
|
{ &ei_ses_bad_parameter_length, { "ses.bad_parameter_length", PI_MALFORMED, PI_ERROR, "Bad parameter length", EXPFILL }},
|
|
};
|
|
|
|
module_t *ses_module;
|
|
expert_module_t* expert_ses;
|
|
|
|
proto_ses = proto_register_protocol(PROTO_STRING_SES, "SES", "ses");
|
|
proto_register_field_array(proto_ses, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_ses = expert_register_protocol(proto_ses);
|
|
expert_register_field_array(expert_ses, ei, array_length(ei));
|
|
|
|
reassembly_table_register (&ses_reassembly_table,
|
|
&addresses_reassembly_table_functions);
|
|
|
|
ses_module = prefs_register_protocol(proto_ses, NULL);
|
|
|
|
prefs_register_bool_preference(ses_module, "desegment",
|
|
"Reassemble session packets ",
|
|
"Whether the session dissector should reassemble messages spanning multiple SES segments",
|
|
&ses_desegment);
|
|
|
|
/*
|
|
* Register the dissector by name, so other dissectors can
|
|
* grab it by name rather than just referring to it directly
|
|
* (you can't refer to it directly from a plugin dissector
|
|
* on Windows without stuffing it into the Big Transfer Vector).
|
|
*/
|
|
register_dissector("ses", dissect_ses, proto_ses);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_ses(void)
|
|
{
|
|
/* define sub dissector */
|
|
pres_handle = find_dissector_add_dependency("pres", proto_ses);
|
|
|
|
/* add our session dissector to cotp dissector list
|
|
* and cotp_is dissector list*/
|
|
heur_dissector_add("cotp", dissect_ses_heur, "SES over COTP", "ses_cotp", proto_ses, HEURISTIC_ENABLE);
|
|
heur_dissector_add("cotp_is", dissect_ses_heur, "SES over COTP (inactive subset)", "ses_cotp_is", proto_ses, HEURISTIC_ENABLE);
|
|
}
|
|
|
|
|
|
|
|
void proto_register_clses(void)
|
|
{
|
|
proto_clses = proto_register_protocol(PROTO_STRING_CLSES, "CLSP", "clsp");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_clses(void)
|
|
{
|
|
/* add our session dissector to cltp dissector list */
|
|
heur_dissector_add("cltp", dissect_ses_heur, "CLSP over COTP", "clses_cotp", proto_clses, HEURISTIC_ENABLE);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|