forked from osmocom/wireshark
302 lines
8.6 KiB
C
302 lines
8.6 KiB
C
/* dvb_chartbl.c
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* Routines for handling DVB-SI character tables (as defined in EN 300 468)
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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 <glib.h>
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#include <epan/proto.h>
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#include <epan/tvbuff.h>
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#include <epan/value_string.h>
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#include "dvb_chartbl.h"
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static const value_string dvb_string_encoding_vals[] = {
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{ DVB_ENCODING_INVALID, "Incorrect length for encoding" },
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{ DVB_ENCODING_RESERVED, "Reserved for future use" },
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{ DVB_ENCODING_UNKNOWN, "Unknown/undefined encoding" },
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{ DVB_ENCODING_LATIN, "Latin (default table)" },
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{ DVB_ENCODING_ISO_8859_1, "ISO/IEC 8859-1 (West European)" },
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{ DVB_ENCODING_ISO_8859_2, "ISO/IEC 8859-2 (East European)" },
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{ DVB_ENCODING_ISO_8859_3, "ISO/IEC 8859-3 (South European)" },
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{ DVB_ENCODING_ISO_8859_4, "ISO/IEC 8859-4 (North and North-East European)" },
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{ DVB_ENCODING_ISO_8859_5, "ISO/IEC 8859-5 (Latin/Cyrillic)" },
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{ DVB_ENCODING_ISO_8859_6, "ISO/IEC 8859-6 (Latin/Arabic)" },
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{ DVB_ENCODING_ISO_8859_7, "ISO/IEC 8859-7 (Latin/Greek)" },
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{ DVB_ENCODING_ISO_8859_8, "ISO/IEC 8859-8 (Latin/Hebrew)" },
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{ DVB_ENCODING_ISO_8859_9, "ISO/IEC 8859-9 (West European & Turkish)" },
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{ DVB_ENCODING_ISO_8859_10, "ISO/IEC 8859-10 (North European)" },
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{ DVB_ENCODING_ISO_8859_11, "ISO/IEC 8859-11 (Thai)" },
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{ DVB_ENCODING_ISO_8859_13, "ISO/IEC 8859-13 (Baltic)" },
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{ DVB_ENCODING_ISO_8859_14, "ISO/IEC 8859-14 (Celtic)" },
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{ DVB_ENCODING_ISO_8859_15, "ISO/IEC 8859-15 (West European)" },
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{ DVB_ENCODING_ISO_10646_BMP, "ISO/IEC 10646 Basic Multilingual Plane" },
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{ DVB_ENCODING_KSX_1001, "KSX 1001-2004 (Korean character set)" },
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{ DVB_ENCODING_GB_2312, "GB-2312-1980 (Simplified Chinese)" },
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{ DVB_ENCODING_ISO_10646_BIG5, "ISO/IEC 10646 BIG5 subset" },
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{ DVB_ENCODING_ISO_10646_UTF8_BMP,
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"ISO/IEC 10646 Basic Multilingual Plane, UTF-8 encoded" },
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{ 0, NULL }
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};
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static dvb_encoding_e
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dvb_analyze_string_charset0(guint8 byte0)
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{
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switch (byte0) {
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case 0x01:
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return DVB_ENCODING_ISO_8859_5;
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case 0x02:
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return DVB_ENCODING_ISO_8859_6;
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case 0x03:
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return DVB_ENCODING_ISO_8859_7;
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case 0x04:
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return DVB_ENCODING_ISO_8859_8;
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case 0x05:
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return DVB_ENCODING_ISO_8859_9;
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case 0x06:
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return DVB_ENCODING_ISO_8859_10;
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case 0x07:
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return DVB_ENCODING_ISO_8859_11;
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case 0x08:
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return DVB_ENCODING_RESERVED; /* was reserved for ISO-8859-12 */
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case 0x09:
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return DVB_ENCODING_ISO_8859_13;
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case 0x0A:
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return DVB_ENCODING_ISO_8859_14;
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case 0x0B:
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return DVB_ENCODING_ISO_8859_15;
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case 0x11:
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return DVB_ENCODING_ISO_10646_BMP;
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case 0x12:
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return DVB_ENCODING_KSX_1001;
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case 0x13:
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return DVB_ENCODING_GB_2312;
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case 0x14:
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return DVB_ENCODING_ISO_10646_BIG5;
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case 0x15:
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return DVB_ENCODING_ISO_10646_UTF8_BMP;
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default:
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return DVB_ENCODING_UNKNOWN;
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}
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}
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static dvb_encoding_e
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dvb_analyze_string_charset0_10(guint16 byte12)
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{
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switch (byte12) {
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case 0x0000:
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return DVB_ENCODING_RESERVED;
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case 0x0001:
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return DVB_ENCODING_ISO_8859_1;
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case 0x0002:
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return DVB_ENCODING_ISO_8859_2;
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case 0x0003:
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return DVB_ENCODING_ISO_8859_3;
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case 0x0004:
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return DVB_ENCODING_ISO_8859_4;
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case 0x0005:
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return DVB_ENCODING_ISO_8859_5;
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case 0x0006:
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return DVB_ENCODING_ISO_8859_6;
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case 0x0007:
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return DVB_ENCODING_ISO_8859_7;
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case 0x0008:
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return DVB_ENCODING_ISO_8859_8;
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case 0x0009:
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return DVB_ENCODING_ISO_8859_9;
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case 0x000A:
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return DVB_ENCODING_ISO_8859_10;
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case 0x000B:
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return DVB_ENCODING_ISO_8859_11;
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case 0x000C:
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return DVB_ENCODING_RESERVED;
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case 0x000D:
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return DVB_ENCODING_ISO_8859_13;
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case 0x000E:
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return DVB_ENCODING_ISO_8859_14;
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case 0x000F:
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return DVB_ENCODING_ISO_8859_15;
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default: /* 0x10 XX XX */
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return DVB_ENCODING_UNKNOWN;
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}
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}
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static dvb_encoding_e
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dvb_analyze_string_charset0_1F(guint8 byte1)
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{
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/* http://www.dvbservices.com/identifiers/encoding_type_id */
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switch (byte1) {
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case 0x00: /* 0x1F 0x00 */
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return DVB_ENCODING_RESERVED;
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case 0x01:
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case 0x02:
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case 0x03:
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case 0x04:
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/* XXX: BBC */
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return DVB_ENCODING_RESERVED;
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case 0x05:
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case 0x06:
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/* XXX: Malaysian Technical Standards Forum Bhd */
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return DVB_ENCODING_RESERVED;
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default: /* 0x1F XX */
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return DVB_ENCODING_RESERVED;
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}
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}
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guint
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dvb_analyze_string_charset(tvbuff_t *tvb, int offset, int length, dvb_encoding_e *encoding)
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{
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if (length >= 1) {
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guint8 byte0 = tvb_get_guint8(tvb, offset + 0);
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if (byte0 >= 0x20) {
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/* the first byte is a normal character, not the number of a character table */
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*encoding = DVB_ENCODING_LATIN;
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return 0;
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} else if (byte0 == 0x1F) {
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if (length >= 2) {
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*encoding = dvb_analyze_string_charset0_1F(tvb_get_guint8(tvb, offset + 1));
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return 2;
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}
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*encoding = DVB_ENCODING_INVALID;
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return 1;
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} else if (byte0 >= 0x16) { /* 16 ... 1E */
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*encoding = DVB_ENCODING_RESERVED;
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return 1;
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} else if (byte0 == 0x10) {
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if (length >= 3) {
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*encoding = dvb_analyze_string_charset0_10(tvb_get_ntohs(tvb, offset + 1));
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return 3;
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}
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*encoding = DVB_ENCODING_INVALID;
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return 1;
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} else if ((byte0 >= 0x0C && byte0 <= 0x0F)) {
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*encoding = DVB_ENCODING_RESERVED;
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return 1;
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} else {
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*encoding = dvb_analyze_string_charset0(byte0);
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return 1;
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}
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} else
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*encoding = DVB_ENCODING_LATIN;
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return 0;
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}
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guint
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dvb_enc_to_item_enc(dvb_encoding_e encoding)
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{
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/* XXX: take ISO control codes into account,
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e.g. 0x86 - turn emphasis on ; 0x87 - turn emphasis off */
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switch (encoding) {
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case DVB_ENCODING_ISO_8859_1:
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return ENC_ISO_8859_1 | ENC_NA;
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case DVB_ENCODING_ISO_8859_2:
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return ENC_ISO_8859_2 | ENC_NA;
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case DVB_ENCODING_ISO_8859_3:
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return ENC_ISO_8859_3 | ENC_NA;
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case DVB_ENCODING_ISO_8859_4:
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return ENC_ISO_8859_4 | ENC_NA;
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case DVB_ENCODING_ISO_8859_5:
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return ENC_ISO_8859_5 | ENC_NA;
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case DVB_ENCODING_ISO_8859_6:
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return ENC_ISO_8859_6 | ENC_NA;
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case DVB_ENCODING_ISO_8859_7:
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return ENC_ISO_8859_7 | ENC_NA;
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case DVB_ENCODING_ISO_8859_8:
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return ENC_ISO_8859_8 | ENC_NA;
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case DVB_ENCODING_ISO_8859_9:
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return ENC_ISO_8859_9 | ENC_NA;
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case DVB_ENCODING_ISO_8859_10:
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return ENC_ISO_8859_10 | ENC_NA;
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case DVB_ENCODING_ISO_8859_11:
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return ENC_ISO_8859_11 | ENC_NA;
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case DVB_ENCODING_ISO_8859_13:
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return ENC_ISO_8859_13 | ENC_NA;
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case DVB_ENCODING_ISO_8859_14:
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return ENC_ISO_8859_14 | ENC_NA;
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case DVB_ENCODING_ISO_8859_15:
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return ENC_ISO_8859_15 | ENC_NA;
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case DVB_ENCODING_ISO_10646_UTF8_BMP:
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return ENC_UTF_8 | ENC_NA;
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default: /* not supported */
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return ENC_ASCII | ENC_NA;
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}
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}
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void
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dvb_add_chartbl(proto_tree *tree, int hf,
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tvbuff_t *tvb, gint offset, gint length, dvb_encoding_e encoding)
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{
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if (tree == NULL)
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return;
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if (length==0) {
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proto_item *pi;
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pi = proto_tree_add_bytes_format(tree, hf, tvb, 0, 0, NULL,
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"Default character table (Latin)");
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proto_item_set_generated(pi);
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}
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else {
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proto_tree_add_bytes_format_value(tree, hf,
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tvb, offset, length, NULL, "%s (%s)",
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val_to_str_const(encoding, dvb_string_encoding_vals, "Unknown"),
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tvb_bytes_to_str_punct(PNODE_POOL(tree), tvb, offset, length, ' '));
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}
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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