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-rw-r--r--epan/dvb_chartbl.c301
1 files changed, 301 insertions, 0 deletions
diff --git a/epan/dvb_chartbl.c b/epan/dvb_chartbl.c
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+++ b/epan/dvb_chartbl.c
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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
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#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 (tree == NULL)
+ return;
+
+ 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(PNODE_POOL(tree), tvb, offset, length, ' '));
+ }
+}
+
+/*
+ * Editor modelines - https://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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