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/* dvb_chartbl.c
* Routines for handling DVB-SI character tables (as defined in EN 300 468)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <epan/proto.h>
#include <epan/tvbuff.h>
#include <epan/value_string.h>
#include "dvb_chartbl.h"
static const value_string dvb_string_encoding_vals[] = {
{ DVB_ENCODING_INVALID, "Incorrect length for encoding" },
{ DVB_ENCODING_RESERVED, "Reserved for future use" },
{ DVB_ENCODING_UNKNOWN, "Unknown/undefined encoding" },
{ DVB_ENCODING_LATIN, "Latin (default table)" },
{ DVB_ENCODING_ISO_8859_1, "ISO/IEC 8859-1 (West European)" },
{ DVB_ENCODING_ISO_8859_2, "ISO/IEC 8859-2 (East European)" },
{ DVB_ENCODING_ISO_8859_3, "ISO/IEC 8859-3 (South European)" },
{ DVB_ENCODING_ISO_8859_4, "ISO/IEC 8859-4 (North and North-East European)" },
{ DVB_ENCODING_ISO_8859_5, "ISO/IEC 8859-5 (Latin/Cyrillic)" },
{ DVB_ENCODING_ISO_8859_6, "ISO/IEC 8859-6 (Latin/Arabic)" },
{ DVB_ENCODING_ISO_8859_7, "ISO/IEC 8859-7 (Latin/Greek)" },
{ DVB_ENCODING_ISO_8859_8, "ISO/IEC 8859-8 (Latin/Hebrew)" },
{ DVB_ENCODING_ISO_8859_9, "ISO/IEC 8859-9 (West European & Turkish)" },
{ DVB_ENCODING_ISO_8859_10, "ISO/IEC 8859-10 (North European)" },
{ DVB_ENCODING_ISO_8859_11, "ISO/IEC 8859-11 (Thai)" },
{ DVB_ENCODING_ISO_8859_13, "ISO/IEC 8859-13 (Baltic)" },
{ DVB_ENCODING_ISO_8859_14, "ISO/IEC 8859-14 (Celtic)" },
{ DVB_ENCODING_ISO_8859_15, "ISO/IEC 8859-15 (West European)" },
{ DVB_ENCODING_ISO_10646_BMP, "ISO/IEC 10646 Basic Multilingual Plane" },
{ DVB_ENCODING_KSX_1001, "KSX 1001-2004 (Korean character set)" },
{ DVB_ENCODING_GB_2312, "GB-2312-1980 (Simplified Chinese)" },
{ DVB_ENCODING_ISO_10646_BIG5, "ISO/IEC 10646 BIG5 subset" },
{ DVB_ENCODING_ISO_10646_UTF8_BMP,
"ISO/IEC 10646 Basic Multilingual Plane, UTF-8 encoded" },
{ 0, NULL }
};
static dvb_encoding_e
dvb_analyze_string_charset0(guint8 byte0)
{
switch (byte0) {
case 0x01:
return DVB_ENCODING_ISO_8859_5;
case 0x02:
return DVB_ENCODING_ISO_8859_6;
case 0x03:
return DVB_ENCODING_ISO_8859_7;
case 0x04:
return DVB_ENCODING_ISO_8859_8;
case 0x05:
return DVB_ENCODING_ISO_8859_9;
case 0x06:
return DVB_ENCODING_ISO_8859_10;
case 0x07:
return DVB_ENCODING_ISO_8859_11;
case 0x08:
return DVB_ENCODING_RESERVED; /* was reserved for ISO-8859-12 */
case 0x09:
return DVB_ENCODING_ISO_8859_13;
case 0x0A:
return DVB_ENCODING_ISO_8859_14;
case 0x0B:
return DVB_ENCODING_ISO_8859_15;
case 0x11:
return DVB_ENCODING_ISO_10646_BMP;
case 0x12:
return DVB_ENCODING_KSX_1001;
case 0x13:
return DVB_ENCODING_GB_2312;
case 0x14:
return DVB_ENCODING_ISO_10646_BIG5;
case 0x15:
return DVB_ENCODING_ISO_10646_UTF8_BMP;
default:
return DVB_ENCODING_UNKNOWN;
}
}
static dvb_encoding_e
dvb_analyze_string_charset0_10(guint16 byte12)
{
switch (byte12) {
case 0x0000:
return DVB_ENCODING_RESERVED;
case 0x0001:
return DVB_ENCODING_ISO_8859_1;
case 0x0002:
return DVB_ENCODING_ISO_8859_2;
case 0x0003:
return DVB_ENCODING_ISO_8859_3;
case 0x0004:
return DVB_ENCODING_ISO_8859_4;
case 0x0005:
return DVB_ENCODING_ISO_8859_5;
case 0x0006:
return DVB_ENCODING_ISO_8859_6;
case 0x0007:
return DVB_ENCODING_ISO_8859_7;
case 0x0008:
return DVB_ENCODING_ISO_8859_8;
case 0x0009:
return DVB_ENCODING_ISO_8859_9;
case 0x000A:
return DVB_ENCODING_ISO_8859_10;
case 0x000B:
return DVB_ENCODING_ISO_8859_11;
case 0x000C:
return DVB_ENCODING_RESERVED;
case 0x000D:
return DVB_ENCODING_ISO_8859_13;
case 0x000E:
return DVB_ENCODING_ISO_8859_14;
case 0x000F:
return DVB_ENCODING_ISO_8859_15;
default: /* 0x10 XX XX */
return DVB_ENCODING_UNKNOWN;
}
}
static dvb_encoding_e
dvb_analyze_string_charset0_1F(guint8 byte1)
{
/* http://www.dvbservices.com/identifiers/encoding_type_id */
switch (byte1) {
case 0x00: /* 0x1F 0x00 */
return DVB_ENCODING_RESERVED;
case 0x01:
case 0x02:
case 0x03:
case 0x04:
/* XXX: BBC */
return DVB_ENCODING_RESERVED;
case 0x05:
case 0x06:
/* XXX: Malaysian Technical Standards Forum Bhd */
return DVB_ENCODING_RESERVED;
default: /* 0x1F XX */
return DVB_ENCODING_RESERVED;
}
}
guint
dvb_analyze_string_charset(tvbuff_t *tvb, int offset, int length, dvb_encoding_e *encoding)
{
if (length >= 1) {
guint8 byte0 = tvb_get_guint8(tvb, offset + 0);
if (byte0 >= 0x20) {
/* the first byte is a normal character, not the number of a character table */
*encoding = DVB_ENCODING_LATIN;
return 0;
} else if (byte0 == 0x1F) {
if (length >= 2) {
*encoding = dvb_analyze_string_charset0_1F(tvb_get_guint8(tvb, offset + 1));
return 2;
}
*encoding = DVB_ENCODING_INVALID;
return 1;
} else if (byte0 >= 0x16) { /* 16 ... 1E */
*encoding = DVB_ENCODING_RESERVED;
return 1;
} else if (byte0 == 0x10) {
if (length >= 3) {
*encoding = dvb_analyze_string_charset0_10(tvb_get_ntohs(tvb, offset + 1));
return 3;
}
*encoding = DVB_ENCODING_INVALID;
return 1;
} else if ((byte0 >= 0x0C && byte0 <= 0x0F)) {
*encoding = DVB_ENCODING_RESERVED;
return 1;
} else {
*encoding = dvb_analyze_string_charset0(byte0);
return 1;
}
} else
*encoding = DVB_ENCODING_LATIN;
return 0;
}
guint
dvb_enc_to_item_enc(dvb_encoding_e encoding)
{
/* XXX: take ISO control codes into account,
e.g. 0x86 - turn emphasis on ; 0x87 - turn emphasis off */
switch (encoding) {
case DVB_ENCODING_ISO_8859_1:
return ENC_ISO_8859_1 | ENC_NA;
case DVB_ENCODING_ISO_8859_2:
return ENC_ISO_8859_2 | ENC_NA;
case DVB_ENCODING_ISO_8859_3:
return ENC_ISO_8859_3 | ENC_NA;
case DVB_ENCODING_ISO_8859_4:
return ENC_ISO_8859_4 | ENC_NA;
case DVB_ENCODING_ISO_8859_5:
return ENC_ISO_8859_5 | ENC_NA;
case DVB_ENCODING_ISO_8859_6:
return ENC_ISO_8859_6 | ENC_NA;
case DVB_ENCODING_ISO_8859_7:
return ENC_ISO_8859_7 | ENC_NA;
case DVB_ENCODING_ISO_8859_8:
return ENC_ISO_8859_8 | ENC_NA;
case DVB_ENCODING_ISO_8859_9:
return ENC_ISO_8859_9 | ENC_NA;
case DVB_ENCODING_ISO_8859_10:
return ENC_ISO_8859_10 | ENC_NA;
case DVB_ENCODING_ISO_8859_11:
return ENC_ISO_8859_11 | ENC_NA;
case DVB_ENCODING_ISO_8859_13:
return ENC_ISO_8859_13 | ENC_NA;
case DVB_ENCODING_ISO_8859_14:
return ENC_ISO_8859_14 | ENC_NA;
case DVB_ENCODING_ISO_8859_15:
return ENC_ISO_8859_15 | ENC_NA;
case DVB_ENCODING_ISO_10646_UTF8_BMP:
return ENC_UTF_8 | ENC_NA;
default: /* not supported */
return ENC_ASCII | ENC_NA;
}
}
void
dvb_add_chartbl(proto_tree *tree, int hf,
tvbuff_t *tvb, gint offset, gint length, dvb_encoding_e encoding)
{
if (length==0) {
proto_item *pi;
pi = proto_tree_add_bytes_format(tree, hf, tvb, 0, 0, NULL,
"Default character table (Latin)");
PROTO_ITEM_SET_GENERATED(pi);
}
else {
proto_tree_add_bytes_format_value(tree, hf,
tvb, offset, length, NULL, "%s (%s)",
val_to_str_const(encoding, dvb_string_encoding_vals, "Unknown"),
tvb_bytes_to_str_punct(wmem_packet_scope(), tvb, offset, length, ' '));
}
}
/*
* 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:
*/
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