forked from osmocom/wireshark
a4c8ebc18b
Have all dissector tables have a "supports Decode As" flag, which defaults to FALSE, and which is set to TRUE if a register_decode_as() refers to it. When adding a dissector to a dissector table with a given key, only add it for Decode As if the dissector table supports it. For non-FT_STRING dissector tables, always check for multiple entries for the same protocol with different dissectors, and report an error if we found them. This means there's no need for the creator of a dissector table to specify whether duplicates of that sort should be allowed - we always do the check when registering something for "Decode As" (in a non-FT_STRING dissector table), and just don't bother registering anything for "Decode As" if the dissector table doesn't support "Decode As", so there's no check done for those dissector tables. Change-Id: I4a1fdea3bddc2af27a65cfbca23edc99b26c0eed Reviewed-on: https://code.wireshark.org/review/17402 Petri-Dish: Guy Harris <guy@alum.mit.edu> Reviewed-by: Guy Harris <guy@alum.mit.edu>
760 lines
29 KiB
C
760 lines
29 KiB
C
/* packet-gsm_sms_ud.c
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* Routines for GSM SMS TP-UD (GSM 03.40) dissection
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*
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* Refer to the AUTHORS file or the AUTHORS section in the man page
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* for contacting the author(s) of this file.
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*
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* Separated from the SMPP dissector by Chris Wilson.
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*
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* UDH and WSP dissection of SMS message, Short Message reassembly,
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* "Decode Short Message with Port Number UDH as CL-WSP" preference,
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* "Always try subdissection of 1st fragment" preference,
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* provided by Olivier Biot.
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*
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* Note on SMS Message reassembly
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* ------------------------------
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* The current Short Message reassembly is possible thanks to the
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* message identifier (8 or 16 bit identifier). It is able to reassemble
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* short messages that are sent over either the same SMPP connection or
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* distinct SMPP connections. Normally the reassembly code is able to deal
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* with duplicate message identifiers since the fragment_add_seq_check()
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* call is used.
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*
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* The SMS TP-UD preference "always try subdissection of 1st fragment" allows
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* a subdissector to be called for the first Short Message fragment,
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* even if reassembly is not possible. This way partial dissection
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* is still possible. This preference is switched off by default.
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*
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* Note on Short Message decoding as CL-WSP
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* ----------------------------------------
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* The SMS TP-UD preference "port_number_udh_means_wsp" is switched off
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* by default. If it is enabled, then any Short Message with a Port Number
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* UDH will be decoded as CL-WSP if:
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* - The Short Message is not segmented
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* - The entire segmented Short Message is reassembled
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* - It is the 1st segment of an unreassembled Short Message (if the
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* "always try subdissection of 1st fragment" preference is enabled)
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/reassemble.h>
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void proto_register_gsm_sms_ud(void);
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void proto_reg_handoff_gsm_sms_ud(void);
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static int proto_gsm_sms_ud = -1;
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/*
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* Short Message fragment handling
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*/
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static int hf_gsm_sms_ud_fragments = -1;
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static int hf_gsm_sms_ud_fragment = -1;
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static int hf_gsm_sms_ud_fragment_overlap = -1;
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static int hf_gsm_sms_ud_fragment_overlap_conflicts = -1;
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static int hf_gsm_sms_ud_fragment_multiple_tails = -1;
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static int hf_gsm_sms_ud_fragment_too_long_fragment = -1;
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static int hf_gsm_sms_ud_fragment_error = -1;
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static int hf_gsm_sms_ud_fragment_count = -1;
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static int hf_gsm_sms_ud_reassembled_in = -1;
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static int hf_gsm_sms_ud_reassembled_length = -1;
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static int hf_gsm_sms_ud_short_msg = -1;
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/*
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* User Data Header section
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*/
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static int hf_gsm_sms_udh_length = -1;
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static int hf_gsm_sms_udh_iei = -1;
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/* static int hf_gsm_sms_udh_multiple_messages = -1; */
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static int hf_gsm_sms_udh_multiple_messages_msg_id = -1;
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static int hf_gsm_sms_udh_multiple_messages_msg_parts = -1;
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static int hf_gsm_sms_udh_multiple_messages_msg_part = -1;
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/* static int hf_gsm_sms_udh_ports = -1; */
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static int hf_gsm_sms_udh_ports_src = -1;
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static int hf_gsm_sms_udh_ports_dst = -1;
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static int hf_gsm_sms_udh_national_single_shift = -1;
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static int hf_gsm_sms_udh_national_locking_shift = -1;
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static gint ett_gsm_sms = -1;
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static gint ett_udh = -1;
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static gint ett_udh_ie = -1;
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static gint ett_gsm_sms_ud_fragment = -1;
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static gint ett_gsm_sms_ud_fragments = -1;
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/* Subdissector declarations */
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static dissector_table_t gsm_sms_dissector_table;
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/* Short Message reassembly */
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static reassembly_table sm_reassembly_table;
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static const fragment_items sm_frag_items = {
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/* Fragment subtrees */
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&ett_gsm_sms_ud_fragment,
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&ett_gsm_sms_ud_fragments,
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/* Fragment fields */
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&hf_gsm_sms_ud_fragments,
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&hf_gsm_sms_ud_fragment,
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&hf_gsm_sms_ud_fragment_overlap,
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&hf_gsm_sms_ud_fragment_overlap_conflicts,
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&hf_gsm_sms_ud_fragment_multiple_tails,
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&hf_gsm_sms_ud_fragment_too_long_fragment,
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&hf_gsm_sms_ud_fragment_error,
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&hf_gsm_sms_ud_fragment_count,
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/* Reassembled in field */
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&hf_gsm_sms_ud_reassembled_in,
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/* Reassembled length field */
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&hf_gsm_sms_ud_reassembled_length,
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/* Reassembled data field */
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NULL,
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/* Tag */
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"Short Message fragments"
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};
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/* Dissect all SM data as WSP if the UDH contains a Port Number IE */
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static gboolean port_number_udh_means_wsp = FALSE;
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/* Always try dissecting the 1st fragment of a SM,
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* even if it is not reassembled */
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static gboolean try_dissect_1st_frag = FALSE;
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/* Prevent subdissectors changing column data */
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static gboolean prevent_subdissectors_changing_columns = FALSE;
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static dissector_handle_t wsp_handle;
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static void
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gsm_sms_ud_defragment_init(void)
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{
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reassembly_table_init(&sm_reassembly_table,
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&addresses_reassembly_table_functions);
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}
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static void
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gsm_sms_ud_defragment_cleanup(void)
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{
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reassembly_table_destroy(&sm_reassembly_table);
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}
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/*
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* Value-arrays for field-contents
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*/
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/* 3GPP TS 23.040 V12.2.0 (2014-10) */
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static const value_string vals_udh_iei[] = {
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{ 0x00, "SMS - Concatenated short messages, 8-bit reference number" },
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{ 0x01, "SMS - Special SMS Message Indication" },
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{ 0x02, "Reserved" },
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{ 0x03, "Value not used to avoid misinterpretation as <LF> character" },
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{ 0x04, "SMS - Application port addressing scheme, 8 bit address" },
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{ 0x05, "SMS - Application port addressing scheme, 16 bit address" },
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{ 0x06, "SMS - SMSC Control Parameters" },
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{ 0x07, "SMS - UDH Source Indicator" },
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{ 0x08, "SMS - Concatenated short message, 16-bit reference number" },
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{ 0x09, "SMS - Wireless Control Message Protocol" },
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{ 0x0A, "EMS - Text Formatting" },
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{ 0x0B, "EMS - Predefined Sound" },
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{ 0x0C, "EMS - User Defined Sound (iMelody max 128 bytes)" },
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{ 0x0D, "EMS - Predefined Animation" },
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{ 0x0E, "EMS - Large Animation (16*16 times 4 = 32*4 =128 bytes)" },
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{ 0x0F, "EMS - Small Animation (8*8 times 4 = 8*4 =32 bytes)" },
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{ 0x10, "EMS - Large Picture (32*32 = 128 bytes)" },
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{ 0x11, "EMS - Small Picture (16*16 = 32 bytes)" },
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{ 0x12, "EMS - Variable Picture" },
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{ 0x13, "EMS - User prompt indicator" },
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{ 0x14, "EMS - Extended Object" },
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{ 0x15, "EMS - Reused Extended Object" },
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{ 0x16, "EMS - Compression Control" },
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{ 0x17, "EMS - Object Distribution Indicator" },
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{ 0x18, "EMS - Standard WVG object" },
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{ 0x19, "EMS - Character Size WVG object" },
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{ 0x1A, "EMS - Extended Object Data Request Command" },
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{ 0x20, "SMS - RFC 822 E-Mail Header" },
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{ 0x21, "SMS - Hyperlink format element" },
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{ 0x22, "SMS - Reply Address Element" },
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{ 0x23, "SMS - Enhanced Voice Mail Information" },
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{ 0x24, "SMS - National Language Single Shift" },
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{ 0x25, "SMS - National Language Locking Shift" },
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{ 0x00, NULL }
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};
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/* 3GPP TS 23.038 V12.0.0 (2014-10) */
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static const value_string vals_udh_national_languages_single_shift[] = {
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{ 0x01, "Turkish" },
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{ 0x02, "Spanish" },
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{ 0x03, "Portuguese" },
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{ 0x04, "Bengali" },
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{ 0x05, "Gujarati" },
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{ 0x06, "Hindi" },
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{ 0x07, "Kannada" },
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{ 0x08, "Malayalam" },
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{ 0x09, "Oriya" },
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{ 0x0A, "Punjabi" },
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{ 0x0B, "Tamil" },
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{ 0x0C, "Telugu" },
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{ 0x0D, "Urdu" },
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{ 0x00, NULL }
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};
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static const value_string vals_udh_national_languages_locking_shift[] = {
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{ 0x01, "Turkish" },
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{ 0x03, "Portuguese" },
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{ 0x04, "Bengali" },
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{ 0x05, "Gujarati" },
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{ 0x06, "Hindi" },
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{ 0x07, "Kannada" },
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{ 0x08, "Malayalam" },
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{ 0x09, "Oriya" },
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{ 0x0A, "Punjabi" },
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{ 0x0B, "Tamil" },
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{ 0x0C, "Telugu" },
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{ 0x0D, "Urdu" },
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{ 0x00, NULL }
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};
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/* Parse Short Message, only if UDH present
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* (otherwise this function is not called).
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* Call WSP dissector if port matches WSP traffic.
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*/
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static void
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parse_gsm_sms_ud_message(proto_tree *sm_tree, tvbuff_t *tvb, packet_info *pinfo,
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proto_tree *top_tree)
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{
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tvbuff_t *sm_tvb = NULL;
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proto_item *ti;
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proto_tree *subtree, *tree;
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guint8 udh_len, udh, len;
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guint sm_len = tvb_reported_length(tvb);
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guint sm_data_len;
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guint32 i = 0;
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/* Multiple Messages UDH */
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gboolean is_fragmented = FALSE;
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fragment_head *fd_sm = NULL;
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guint16 sm_id = 0;
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guint16 frags = 0;
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guint16 frag = 0;
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gboolean save_fragmented = FALSE;
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gboolean try_gsm_sms_ud_reassemble = FALSE;
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/* SMS Message reassembly */
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gboolean reassembled = FALSE;
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guint32 reassembled_in = 0;
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/* Port Number UDH */
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guint16 p_src = 0;
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guint16 p_dst = 0;
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gboolean ports_available = FALSE;
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udh_len = tvb_get_guint8(tvb, i++);
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ti = proto_tree_add_uint(sm_tree, hf_gsm_sms_udh_length, tvb, 0, 1, udh_len);
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tree = proto_item_add_subtree(ti, ett_udh);
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while (i < udh_len) {
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udh = tvb_get_guint8(tvb, i++);
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len = tvb_get_guint8(tvb, i++);
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subtree = proto_tree_add_uint(tree, hf_gsm_sms_udh_iei,
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tvb, i-2, 2+len, udh);
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switch (udh) {
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case 0x00: /* Multiple messages - 8-bit message ID */
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if (len == 3) {
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sm_id = tvb_get_guint8(tvb, i++);
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frags = tvb_get_guint8(tvb, i++);
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frag = tvb_get_guint8(tvb, i++);
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if (frags > 1)
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is_fragmented = TRUE;
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proto_item_append_text(subtree,
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": message %u, part %u of %u", sm_id, frag, frags);
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subtree = proto_item_add_subtree(subtree,
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ett_udh_ie);
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proto_tree_add_uint(subtree,
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hf_gsm_sms_udh_multiple_messages_msg_id,
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tvb, i-3, 1, sm_id);
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proto_tree_add_uint(subtree,
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hf_gsm_sms_udh_multiple_messages_msg_parts,
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tvb, i-2, 1, frags);
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proto_tree_add_uint(subtree,
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hf_gsm_sms_udh_multiple_messages_msg_part,
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tvb, i-1, 1, frag);
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} else {
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proto_item_append_text(subtree, " - Invalid format!");
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i += len;
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}
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break;
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case 0x08: /* Multiple messages - 16-bit message ID */
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if (len == 4) {
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sm_id = tvb_get_ntohs(tvb, i); i += 2;
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frags = tvb_get_guint8(tvb, i++);
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frag = tvb_get_guint8(tvb, i++);
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if (frags > 1)
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is_fragmented = TRUE;
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proto_item_append_text(subtree,
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": message %u, part %u of %u", sm_id, frag, frags);
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subtree = proto_item_add_subtree(subtree,
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ett_udh_ie);
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proto_tree_add_uint(subtree,
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hf_gsm_sms_udh_multiple_messages_msg_id,
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tvb, i-4, 2, sm_id);
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proto_tree_add_uint(subtree,
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hf_gsm_sms_udh_multiple_messages_msg_parts,
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tvb, i-2, 1, frags);
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proto_tree_add_uint(subtree,
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hf_gsm_sms_udh_multiple_messages_msg_part,
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tvb, i-1, 1, frag);
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} else {
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proto_item_append_text(subtree, " - Invalid format!");
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i += len;
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}
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break;
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case 0x04: /* Port Number UDH - 8-bit address */
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if (len == 2) { /* Port fields */
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p_dst = tvb_get_guint8(tvb, i++);
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p_src = tvb_get_guint8(tvb, i++);
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proto_item_append_text(subtree,
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": source port %u, destination port %u",
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p_src, p_dst);
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subtree = proto_item_add_subtree(subtree, ett_udh_ie);
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proto_tree_add_uint(subtree, hf_gsm_sms_udh_ports_dst,
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tvb, i-2, 1, p_dst);
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proto_tree_add_uint(subtree, hf_gsm_sms_udh_ports_src,
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tvb, i-1, 1, p_src);
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ports_available = TRUE;
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} else {
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proto_item_append_text(subtree, " - Invalid format!");
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i += len;
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}
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break;
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case 0x05: /* Port Number UDH - 16-bit address */
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if (len == 4) { /* Port fields */
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p_dst = tvb_get_ntohs(tvb, i); i += 2;
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p_src = tvb_get_ntohs(tvb, i); i += 2;
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proto_item_append_text(subtree,
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": source port %u, destination port %u",
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p_src, p_dst);
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subtree = proto_item_add_subtree(subtree, ett_udh_ie);
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proto_tree_add_uint(subtree, hf_gsm_sms_udh_ports_dst,
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tvb, i-4, 2, p_dst);
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proto_tree_add_uint(subtree, hf_gsm_sms_udh_ports_src,
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tvb, i-2, 2, p_src);
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ports_available = TRUE;
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} else {
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proto_item_append_text(subtree, " - Invalid format!");
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i += len;
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}
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break;
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case 0x24: /* National Language Single Shift */
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if (len == 1) {
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subtree = proto_item_add_subtree(subtree, ett_udh_ie);
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proto_tree_add_item(subtree,
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hf_gsm_sms_udh_national_single_shift,
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tvb, i++, 1, ENC_BIG_ENDIAN);
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} else {
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proto_item_append_text(subtree, " - Invalid format!");
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i += len;
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}
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break;
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case 0x25: /* National Language Locking Shift */
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if (len == 1) {
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subtree = proto_item_add_subtree(subtree, ett_udh_ie);
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proto_tree_add_item(subtree,
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hf_gsm_sms_udh_national_locking_shift,
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tvb, i++, 1, ENC_BIG_ENDIAN);
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} else {
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proto_item_append_text(subtree, " - Invalid format!");
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i += len;
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}
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break;
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default:
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i += len;
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break;
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}
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}
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if (tvb_reported_length_remaining(tvb, i) <= 0)
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return; /* No more data */
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/*
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* XXX - where does the "1" come from? If it weren't there,
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* "sm_data_len" would, I think, be the same as
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* "tvb_reported_length_remaining(tvb, i)".
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*
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* I think that the above check ensures that "sm_len" won't
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* be less than or equal to "udh_len", so it ensures that
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* "sm_len" won't be less than "1 + udh_len", so we don't
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* have to worry about "sm_data_len" being negative.
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*/
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sm_data_len = sm_len - (1 + udh_len);
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if (sm_data_len == 0)
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return; /* no more data */
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/*
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* Try reassembling the packets.
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* XXX - fragment numbers are 1-origin, but the fragment number
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|
* field could be 0.
|
|
* Should we flag a fragmented message with a fragment number field
|
|
* of 0?
|
|
* What if the fragment count is 0? Should we flag that as well?
|
|
*/
|
|
if (is_fragmented && frag != 0 && frags != 0 &&
|
|
tvb_bytes_exist(tvb, i, sm_data_len)) {
|
|
try_gsm_sms_ud_reassemble = TRUE;
|
|
save_fragmented = pinfo->fragmented;
|
|
pinfo->fragmented = TRUE;
|
|
fd_sm = fragment_add_seq_check(&sm_reassembly_table,
|
|
tvb, i,
|
|
pinfo,
|
|
sm_id, /* guint32 ID for fragments belonging together */
|
|
NULL,
|
|
frag-1, /* guint32 fragment sequence number */
|
|
sm_data_len, /* guint32 fragment length */
|
|
(frag != frags)); /* More fragments? */
|
|
if (fd_sm) {
|
|
reassembled = TRUE;
|
|
reassembled_in = fd_sm->reassembled_in;
|
|
}
|
|
sm_tvb = process_reassembled_data(tvb, i, pinfo,
|
|
"Reassembled Short Message", fd_sm, &sm_frag_items,
|
|
NULL, sm_tree);
|
|
if (reassembled) { /* Reassembled */
|
|
col_append_str(pinfo->cinfo, COL_INFO,
|
|
" (Short Message Reassembled)");
|
|
} else {
|
|
/* Not last packet of reassembled Short Message */
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" (Short Message fragment %u of %u)", frag, frags);
|
|
}
|
|
} /* Else: not fragmented */
|
|
|
|
if (! sm_tvb) /* One single Short Message, or not reassembled */
|
|
sm_tvb = tvb_new_subset_remaining(tvb, i);
|
|
/* Try calling a subdissector */
|
|
if (sm_tvb) {
|
|
if ((reassembled && pinfo->num == reassembled_in)
|
|
|| frag==0 || (frag==1 && try_dissect_1st_frag)) {
|
|
/* Try calling a subdissector only if:
|
|
* - the Short Message is reassembled in this very packet,
|
|
* - the Short Message consists of only one "fragment",
|
|
* - the preference "Always Try Dissection for 1st SM fragment"
|
|
* is switched on, and this is the SM's 1st fragment. */
|
|
if (ports_available) {
|
|
gboolean disallow_write = FALSE; /* TRUE if we changed writability
|
|
of the columns of the summary */
|
|
if (prevent_subdissectors_changing_columns && col_get_writable(pinfo->cinfo, -1)) {
|
|
disallow_write = TRUE;
|
|
col_set_writable(pinfo->cinfo, -1, FALSE);
|
|
}
|
|
|
|
if (port_number_udh_means_wsp) {
|
|
call_dissector(wsp_handle, sm_tvb, pinfo, top_tree);
|
|
} else {
|
|
if (! dissector_try_uint(gsm_sms_dissector_table, p_src,
|
|
sm_tvb, pinfo, top_tree)) {
|
|
if (! dissector_try_uint(gsm_sms_dissector_table, p_dst,
|
|
sm_tvb, pinfo, top_tree)) {
|
|
if (sm_tree) { /* Only display if needed */
|
|
proto_tree_add_item(sm_tree, hf_gsm_sms_ud_short_msg, sm_tvb, 0, -1, ENC_NA);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (disallow_write)
|
|
col_set_writable(pinfo->cinfo, -1, TRUE);
|
|
} else { /* No ports IE */
|
|
proto_tree_add_item(sm_tree, hf_gsm_sms_ud_short_msg, sm_tvb, 0, -1, ENC_NA);
|
|
}
|
|
} else {
|
|
/* The packet is not reassembled,
|
|
* or it is reassembled in another packet */
|
|
proto_tree_add_bytes_format(sm_tree, hf_gsm_sms_ud_short_msg, sm_tvb, 0, -1,
|
|
NULL, "Unreassembled Short Message fragment %u of %u",
|
|
frag, frags);
|
|
}
|
|
}
|
|
|
|
if (try_gsm_sms_ud_reassemble) /* Clean up defragmentation */
|
|
pinfo->fragmented = save_fragmented;
|
|
return;
|
|
}
|
|
|
|
static int
|
|
dissect_gsm_sms_ud(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *subtree;
|
|
|
|
ti = proto_tree_add_item(tree, proto_gsm_sms_ud, tvb, 0, -1, ENC_NA);
|
|
subtree = proto_item_add_subtree(ti, ett_gsm_sms);
|
|
parse_gsm_sms_ud_message(subtree, tvb, pinfo, tree);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Register the protocol with Wireshark */
|
|
void
|
|
proto_register_gsm_sms_ud(void)
|
|
{
|
|
module_t *gsm_sms_ud_module; /* Preferences for GSM SMS UD */
|
|
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
/*
|
|
* User Data Header
|
|
*/
|
|
{ &hf_gsm_sms_udh_iei,
|
|
{ "IE Id", "gsm_sms_ud.udh.iei",
|
|
FT_UINT8, BASE_HEX, VALS(vals_udh_iei), 0x00,
|
|
"Name of the User Data Header Information Element.",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_udh_length,
|
|
{ "UDH Length", "gsm_sms_ud.udh.len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
"Length of the User Data Header (bytes)",
|
|
HFILL
|
|
}
|
|
},
|
|
#if 0
|
|
{ &hf_gsm_sms_udh_multiple_messages,
|
|
{ "Multiple messages UDH", "gsm_sms_ud.udh.mm",
|
|
FT_NONE, BASE_NONE, NULL, 0x00,
|
|
"Multiple messages User Data Header",
|
|
HFILL
|
|
}
|
|
},
|
|
#endif
|
|
{ &hf_gsm_sms_udh_multiple_messages_msg_id,
|
|
{ "Message identifier", "gsm_sms_ud.udh.mm.msg_id",
|
|
FT_UINT16, BASE_DEC, NULL, 0x00,
|
|
"Identification of the message",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_udh_multiple_messages_msg_parts,
|
|
{ "Message parts", "gsm_sms_ud.udh.mm.msg_parts",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
"Total number of message parts (fragments)",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_udh_multiple_messages_msg_part,
|
|
{ "Message part number", "gsm_sms_ud.udh.mm.msg_part",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
"Message part (fragment) sequence number",
|
|
HFILL
|
|
}
|
|
},
|
|
#if 0
|
|
{ &hf_gsm_sms_udh_ports,
|
|
{ "Port number UDH", "gsm_sms_ud.udh.ports",
|
|
FT_NONE, BASE_NONE, NULL, 0x00,
|
|
"Port number User Data Header",
|
|
HFILL
|
|
}
|
|
},
|
|
#endif
|
|
{ &hf_gsm_sms_udh_ports_src,
|
|
{ "Source port", "gsm_sms_ud.udh.ports.src",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_udh_ports_dst,
|
|
{ "Destination port", "gsm_sms_ud.udh.ports.dst",
|
|
FT_UINT8, BASE_DEC, NULL, 0x00,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_udh_national_single_shift,
|
|
{ "Language", "gsm_sms_ud.udh.national.single_shift",
|
|
FT_UINT8, BASE_DEC,
|
|
VALS(vals_udh_national_languages_single_shift), 0x00,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_udh_national_locking_shift,
|
|
{ "Language", "gsm_sms_ud.udh.national.locking_shift",
|
|
FT_UINT8, BASE_DEC,
|
|
VALS(vals_udh_national_languages_locking_shift), 0x00,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
/*
|
|
* Short Message fragment reassembly
|
|
*/
|
|
{ &hf_gsm_sms_ud_fragments,
|
|
{ "Short Message fragments", "gsm_sms_ud.fragments",
|
|
FT_NONE, BASE_NONE, NULL, 0x00,
|
|
"GSM Short Message fragments",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_fragment,
|
|
{ "Short Message fragment", "gsm_sms_ud.fragment",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00,
|
|
"GSM Short Message fragment",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_fragment_overlap,
|
|
{ "Short Message fragment overlap", "gsm_sms_ud.fragment.overlap",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"GSM Short Message fragment overlaps with other fragment(s)",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_fragment_overlap_conflicts,
|
|
{ "Short Message fragment overlapping with conflicting data",
|
|
"gsm_sms_ud.fragment.overlap.conflicts",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"GSM Short Message fragment overlaps with conflicting data",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_fragment_multiple_tails,
|
|
{ "Short Message has multiple tail fragments",
|
|
"gsm_sms_ud.fragment.multiple_tails",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"GSM Short Message fragment has multiple tail fragments",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_fragment_too_long_fragment,
|
|
{ "Short Message fragment too long",
|
|
"gsm_sms_ud.fragment.too_long_fragment",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"GSM Short Message fragment data goes beyond the packet end",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_fragment_error,
|
|
{ "Short Message defragmentation error", "gsm_sms_ud.fragment.error",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00,
|
|
"GSM Short Message defragmentation error due to illegal fragments",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_fragment_count,
|
|
{ "Short Message fragment count", "gsm_sms_ud.fragment.count",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00,
|
|
NULL,
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_reassembled_in,
|
|
{ "Reassembled in",
|
|
"gsm_sms_ud.reassembled.in",
|
|
FT_FRAMENUM, BASE_NONE, NULL, 0x00,
|
|
"GSM Short Message has been reassembled in this packet.",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_reassembled_length,
|
|
{ "Reassembled Short Message length",
|
|
"gsm_sms_ud.reassembled.length",
|
|
FT_UINT32, BASE_DEC, NULL, 0x00,
|
|
"The total length of the reassembled payload",
|
|
HFILL
|
|
}
|
|
},
|
|
{ &hf_gsm_sms_ud_short_msg,
|
|
{ "Short Message body",
|
|
"gsm_sms_ud.short_msg",
|
|
FT_BYTES, BASE_NONE, NULL, 0x00, NULL, HFILL
|
|
}
|
|
},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_gsm_sms,
|
|
&ett_udh,
|
|
&ett_udh_ie,
|
|
&ett_gsm_sms_ud_fragment,
|
|
&ett_gsm_sms_ud_fragments,
|
|
};
|
|
/* Register the protocol name and description */
|
|
proto_gsm_sms_ud = proto_register_protocol(
|
|
"GSM Short Message Service User Data", /* Name */
|
|
"GSM SMS UD", /* Short name */
|
|
"gsm_sms_ud"); /* Filter name */
|
|
|
|
/* Required function calls to register header fields and subtrees used */
|
|
proto_register_field_array(proto_gsm_sms_ud, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Subdissector code */
|
|
gsm_sms_dissector_table = register_dissector_table("gsm_sms_ud.udh.port",
|
|
"GSM SMS port IE in UDH", proto_gsm_sms_ud, FT_UINT16, BASE_DEC);
|
|
|
|
/* Preferences for GSM SMS UD */
|
|
gsm_sms_ud_module = prefs_register_protocol(proto_gsm_sms_ud, NULL);
|
|
prefs_register_bool_preference(gsm_sms_ud_module,
|
|
"port_number_udh_means_wsp",
|
|
"Port Number IE in UDH always triggers CL-WSP dissection",
|
|
"Always decode a GSM Short Message as Connectionless WSP "
|
|
"if a Port Number Information Element is present "
|
|
"in the SMS User Data Header.",
|
|
&port_number_udh_means_wsp);
|
|
prefs_register_bool_preference(gsm_sms_ud_module, "try_dissect_1st_fragment",
|
|
"Always try subdissection of 1st Short Message fragment",
|
|
"Always try subdissection of the 1st fragment of a fragmented "
|
|
"GSM Short Message. If reassembly is possible, the Short Message "
|
|
"may be dissected twice (once as a short frame, once in its "
|
|
"entirety).",
|
|
&try_dissect_1st_frag);
|
|
prefs_register_bool_preference(gsm_sms_ud_module, "prevent_dissectors_chg_cols",
|
|
"Prevent sub-dissectors from changing column data",
|
|
"Prevent sub-dissectors from replacing column data with their "
|
|
"own. Eg. Prevent WSP dissector overwriting SMPP information.",
|
|
&prevent_subdissectors_changing_columns);
|
|
|
|
register_dissector("gsm_sms_ud", dissect_gsm_sms_ud, proto_gsm_sms_ud);
|
|
|
|
/* GSM SMS UD dissector initialization routines */
|
|
register_init_routine(gsm_sms_ud_defragment_init);
|
|
register_cleanup_routine(gsm_sms_ud_defragment_cleanup);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_gsm_sms_ud(void)
|
|
{
|
|
wsp_handle = find_dissector_add_dependency("wsp-cl", proto_gsm_sms_ud);
|
|
DISSECTOR_ASSERT(wsp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|