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wireshark/ui/qt/show_packet_bytes_dialog.cpp

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/* show_packet_bytes_dialog.cpp
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "show_packet_bytes_dialog.h"
#include <ui_show_packet_bytes_dialog.h>
#include "main_window.h"
#include "main_application.h"
#include "ui/qt/widgets/wireshark_file_dialog.h"
#include "epan/strutil.h"
#include "wsutil/utf8_entities.h"
#include <QAction>
#include <QClipboard>
#include <QImage>
#include <QJsonDocument>
#include <QKeyEvent>
#include <QMenu>
#include <QPrintDialog>
#include <QPrinter>
#include <QTextCodec>
#include <QTextStream>
// To do:
// - Add show as custom protocol in a Packet Details view
// - Use ByteViewText to ShowAsHexDump and supplementary view for custom protocol
// - Handle large data blocks
ShowPacketBytesDialog::ShowPacketBytesDialog(QWidget &parent, CaptureFile &cf) :
WiresharkDialog(parent, cf),
ui(new Ui::ShowPacketBytesDialog),
finfo_(cf.capFile()->finfo_selected),
decode_as_(DecodeAsNone),
show_as_(ShowAsASCII),
use_regex_find_(false)
{
ui->setupUi(this);
loadGeometry(parent.width() * 2 / 3, parent.height() * 3 / 4);
QString field_name = QString("%1 (%2)").arg(finfo_->hfinfo->name, finfo_->hfinfo->abbrev);
setWindowSubtitle (field_name);
hint_label_ = tr("Frame %1, %2, %Ln byte(s).", "", finfo_->length)
.arg(cf.capFile()->current_frame->num)
.arg(field_name);
ui->tePacketBytes->installEventFilter(this);
connect(ui->tePacketBytes, SIGNAL(showSelected(int,int)), this, SLOT(showSelected(int,int)));
connect(ui->leFind, SIGNAL(useRegexFind(bool)), this, SLOT(useRegexFind(bool)));
ui->cbDecodeAs->blockSignals(true);
ui->cbDecodeAs->addItem(tr("None"), DecodeAsNone);
ui->cbDecodeAs->addItem(tr("Base64"), DecodeAsBASE64);
ui->cbDecodeAs->addItem(tr("Compressed"), DecodeAsCompressed);
ui->cbDecodeAs->addItem(tr("Hex Digits"), DecodeAsHexDigits);
ui->cbDecodeAs->addItem(tr("Percent-Encoding"), DecodeAsPercentEncoding);
ui->cbDecodeAs->addItem(tr("Quoted-Printable"), DecodeAsQuotedPrintable);
ui->cbDecodeAs->addItem(tr("ROT13"), DecodeAsROT13);
ui->cbDecodeAs->blockSignals(false);
ui->cbShowAs->blockSignals(true);
ui->cbShowAs->addItem(tr("ASCII"), ShowAsASCII);
ui->cbShowAs->addItem(tr("ASCII & Control"), ShowAsASCIIandControl);
ui->cbShowAs->addItem(tr("C Array"), ShowAsCArray);
ui->cbShowAs->addItem(tr("EBCDIC"), ShowAsEBCDIC);
ui->cbShowAs->addItem(tr("Hex Dump"), ShowAsHexDump);
ui->cbShowAs->addItem(tr("HTML"), ShowAsHTML);
ui->cbShowAs->addItem(tr("Image"), ShowAsImage);
ui->cbShowAs->addItem(tr("JSON"), ShowAsJson);
ui->cbShowAs->addItem(tr("Raw"), ShowAsRAW);
ui->cbShowAs->addItem(tr("Rust Array"), ShowAsRustArray);
// UTF-8 is guaranteed to exist as a QTextCodec
ui->cbShowAs->addItem(tr("UTF-8"), ShowAsCodec);
ui->cbShowAs->addItem(tr("YAML"), ShowAsYAML);
ui->cbShowAs->setCurrentIndex(show_as_);
ui->cbShowAs->blockSignals(false);
ui->sbStart->setMinimum(0);
ui->sbEnd->setMaximum(finfo_->length - 1);
print_button_ = ui->buttonBox->addButton(tr("Print"), QDialogButtonBox::ActionRole);
connect(print_button_, SIGNAL(clicked()), this, SLOT(printBytes()));
copy_button_ = ui->buttonBox->addButton(tr("Copy"), QDialogButtonBox::ActionRole);
connect(copy_button_, SIGNAL(clicked()), this, SLOT(copyBytes()));
save_as_button_ = ui->buttonBox->addButton(tr("Save as…"), QDialogButtonBox::ActionRole);
connect(save_as_button_, SIGNAL(clicked()), this, SLOT(saveAs()));
connect(ui->buttonBox, SIGNAL(helpRequested()), this, SLOT(helpButton()));
setStartAndEnd(0, (finfo_->length - 1));
updateFieldBytes(true);
}
ShowPacketBytesDialog::~ShowPacketBytesDialog()
{
delete ui;
}
void ShowPacketBytesDialog::addCodecs(const QMap<QString, QTextCodec *> &codecMap)
{
ui->cbShowAs->blockSignals(true);
// Make the combobox respect max visible items?
//ui->cbShowAs->setStyleSheet("QComboBox { combobox-popup: 0;}");
ui->cbShowAs->insertSeparator(ui->cbShowAs->count());
for (const auto &codec : qAsConst(codecMap)) {
// This is already placed in the menu and handled separately
if (codec->name() != "US-ASCII" && codec->name() != "UTF-8")
ui->cbShowAs->addItem(tr(codec->name()), ShowAsCodec);
}
ui->cbShowAs->blockSignals(false);
}
void ShowPacketBytesDialog::showSelected(int start, int end)
{
if (end == -1) {
// end set to -1 means show all packet bytes
setStartAndEnd(0, (finfo_->length - 1));
} else {
if (show_as_ == ShowAsRAW) {
start /= 2;
end = (end + 1) / 2;
}
setStartAndEnd(start_ + start, start_ + end - 1);
}
updateFieldBytes();
}
void ShowPacketBytesDialog::setStartAndEnd(int start, int end)
{
start_ = start;
end_ = end;
ui->sbStart->blockSignals(true);
ui->sbStart->setMaximum(end_);
ui->sbStart->setValue(start_);
ui->sbStart->blockSignals(false);
ui->sbEnd->blockSignals(true);
ui->sbEnd->setMinimum(start_);
ui->sbEnd->setValue(end_);
ui->sbEnd->blockSignals(false);
updateHintLabel();
}
bool ShowPacketBytesDialog::enableShowSelected()
{
// "Show Selected" only works when showing all bytes:
// - DecodeAs must not alter the number of bytes in the buffer
// - ShowAs must show all bytes in the buffer
return (((decode_as_ == DecodeAsNone) ||
(decode_as_ == DecodeAsROT13)) &&
((show_as_ == ShowAsASCII) ||
(show_as_ == ShowAsASCIIandControl) ||
(show_as_ == ShowAsEBCDIC) ||
(show_as_ == ShowAsRAW)));
}
void ShowPacketBytesDialog::updateWidgets()
{
WiresharkDialog::updateWidgets();
}
void ShowPacketBytesDialog::updateHintLabel()
{
QString hint = hint_label_;
if (start_ > 0 || end_ < (finfo_->length - 1)) {
hint.append(" <span style=\"color: red\">" +
tr("Displaying %Ln byte(s).", "", end_ - start_ + 1) +
"</span>");
}
ui->hintLabel->setText("<small><i>" + hint + "</i></small>");
}
void ShowPacketBytesDialog::on_sbStart_valueChanged(int value)
{
start_ = value;
ui->sbEnd->setMinimum(value);
updateHintLabel();
updateFieldBytes();
}
void ShowPacketBytesDialog::on_sbEnd_valueChanged(int value)
{
end_ = value;
ui->sbStart->setMaximum(value);
updateHintLabel();
updateFieldBytes();
}
void ShowPacketBytesDialog::on_cbDecodeAs_currentIndexChanged(int idx)
{
if (idx < 0) return;
decode_as_ = static_cast<DecodeAsType>(ui->cbDecodeAs->itemData(idx).toInt());
ui->tePacketBytes->setShowSelectedEnabled(enableShowSelected());
updateFieldBytes();
}
void ShowPacketBytesDialog::on_cbShowAs_currentIndexChanged(int idx)
{
if (idx < 0) return;
show_as_ = static_cast<ShowAsType>(ui->cbShowAs->itemData(idx).toInt());
ui->tePacketBytes->setShowSelectedEnabled(enableShowSelected());
ui->lFind->setEnabled(true);
ui->leFind->setEnabled(true);
ui->bFind->setEnabled(true);
print_button_->setEnabled(true);
copy_button_->setEnabled(true);
save_as_button_->setEnabled(true);
updatePacketBytes();
}
void ShowPacketBytesDialog::useRegexFind(bool use_regex)
{
use_regex_find_ = use_regex;
if (use_regex_find_)
ui->lFind->setText(tr("Regex Find:"));
else
ui->lFind->setText(tr("Find:"));
}
void ShowPacketBytesDialog::findText(bool go_back)
{
if (ui->leFind->text().isEmpty()) return;
bool found;
if (use_regex_find_) {
#if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0))
QRegularExpression regex(ui->leFind->text(), QRegularExpression::UseUnicodePropertiesOption);
#else
QRegExp regex(ui->leFind->text());
#endif
found = ui->tePacketBytes->find(regex);
} else {
found = ui->tePacketBytes->find(ui->leFind->text());
}
if (found) {
ui->tePacketBytes->setFocus();
} else if (go_back) {
ui->tePacketBytes->moveCursor(QTextCursor::Start);
findText(false);
}
}
void ShowPacketBytesDialog::printBytes()
{
#ifndef QT_NO_PRINTER
QPrinter printer(QPrinter::HighResolution);
QPrintDialog dialog(&printer, this);
if (dialog.exec() == QDialog::Accepted)
ui->tePacketBytes->print(&printer);
#endif
}
void ShowPacketBytesDialog::copyBytes()
{
switch (show_as_) {
case ShowAsASCII:
{
QByteArray ba(field_bytes_);
sanitizeBuffer(ba, true);
mainApp->clipboard()->setText(ba);
break;
}
case ShowAsASCIIandControl:
case ShowAsCArray:
case ShowAsRustArray:
case ShowAsEBCDIC:
case ShowAsHexDump:
case ShowAsJson:
case ShowAsRAW:
case ShowAsYAML:
mainApp->clipboard()->setText(ui->tePacketBytes->toPlainText());
break;
case ShowAsHTML:
mainApp->clipboard()->setText(ui->tePacketBytes->toHtml());
break;
case ShowAsImage:
mainApp->clipboard()->setImage(image_);
break;
case ShowAsCodec:
mainApp->clipboard()->setText(ui->tePacketBytes->toPlainText().toUtf8());
break;
}
}
void ShowPacketBytesDialog::saveAs()
{
QString file_name = WiresharkFileDialog::getSaveFileName(this, mainApp->windowTitleString(tr("Save Selected Packet Bytes As…")));
if (file_name.isEmpty())
return;
QFile::OpenMode open_mode = QFile::WriteOnly;
switch (show_as_) {
case ShowAsASCII:
case ShowAsASCIIandControl:
case ShowAsCArray:
case ShowAsRustArray:
// We always save as UTF-8, so set text mode as we would for UTF-8
case ShowAsCodec:
case ShowAsHexDump:
case ShowAsJson:
case ShowAsYAML:
case ShowAsHTML:
open_mode |= QFile::Text;
default:
break;
}
QFile file(file_name);
file.open(open_mode);
switch (show_as_) {
case ShowAsASCII:
{
QByteArray ba(field_bytes_);
sanitizeBuffer(ba, true);
file.write(ba);
break;
}
case ShowAsASCIIandControl:
case ShowAsCArray:
case ShowAsRustArray:
case ShowAsEBCDIC:
case ShowAsHexDump:
case ShowAsJson:
case ShowAsYAML:
{
QTextStream out(&file);
out << ui->tePacketBytes->toPlainText();
break;
}
case ShowAsHTML:
{
QTextStream out(&file);
out << ui->tePacketBytes->toHtml();
break;
}
case ShowAsCodec:
{
QTextStream out(&file);
out << ui->tePacketBytes->toPlainText().toUtf8();
break;
}
case ShowAsImage:
case ShowAsRAW:
file.write(field_bytes_);
break;
}
file.close();
}
void ShowPacketBytesDialog::helpButton()
{
mainApp->helpTopicAction(HELP_SHOW_PACKET_BYTES_DIALOG);
}
void ShowPacketBytesDialog::on_bFind_clicked()
{
findText();
}
void ShowPacketBytesDialog::on_leFind_returnPressed()
{
findText();
}
// Not sure why we have to do this manually.
void ShowPacketBytesDialog::on_buttonBox_rejected()
{
WiresharkDialog::reject();
}
// The following keyboard shortcuts should work (although
// they may not work consistently depending on focus):
// / (slash), Ctrl-F - Focus and highlight the search box
// Ctrl-G, Ctrl-N, F3 - Find next
// Should we make it so that typing any text starts searching?
bool ShowPacketBytesDialog::eventFilter(QObject *, QEvent *event)
{
if (ui->tePacketBytes->hasFocus() && event->type() == QEvent::KeyPress) {
QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
if (keyEvent->matches(QKeySequence::SelectAll) || keyEvent->matches(QKeySequence::Copy)
|| keyEvent->text().isEmpty()) {
return false;
}
ui->leFind->setFocus();
if (keyEvent->matches(QKeySequence::Find)) {
return true;
} else if (keyEvent->matches(QKeySequence::FindNext)) {
findText();
return true;
}
}
return false;
}
void ShowPacketBytesDialog::keyPressEvent(QKeyEvent *event)
{
if (ui->leFind->hasFocus()) {
if (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) {
findText();
return;
}
} else {
if (event->key() == Qt::Key_Slash || event->matches(QKeySequence::Find)) {
ui->leFind->setFocus();
ui->leFind->selectAll();
}
return;
}
if (event->key() == Qt::Key_F3 || (event->key() == Qt::Key_N && event->modifiers() & Qt::ControlModifier)) {
findText();
return;
}
QDialog::keyPressEvent(event);
}
void ShowPacketBytesDialog::sanitizeBuffer(QByteArray &ba, bool keep_CR)
{
for (int i = 0; i < ba.length(); i++) {
if (ba[i] == '\n' || (keep_CR && ba[i] == '\r'))
// Keep LF and optionally CR
continue;
if (ba[i] == '\0' || g_ascii_isspace(ba[i])) {
ba[i] = ' ';
} else if (!g_ascii_isprint(ba[i])) {
ba.replace(i, 1, UTF8_MIDDLE_DOT);
i += sizeof(UTF8_MIDDLE_DOT) - 2;
}
}
}
void ShowPacketBytesDialog::symbolizeBuffer(QByteArray &ba)
{
// Replace all characters that aren't printable ASCII or ASCII
// control characters with MIDDLE DOT.
for (int i = 0; i < ba.length(); i++) {
if (!g_ascii_isprint(ba[i]) && !g_ascii_iscntrl(ba[i])) {
ba.replace(i, 1, UTF8_MIDDLE_DOT);
i += sizeof(UTF8_MIDDLE_DOT) - 2;
}
}
// Replace all control characters (NUL through US, i.e. [0, ' '),
// and DEL, i.e. 0x7f) with the code point for the symbol for that
// character, i.e. the character's abbreviation in small letters.
//
// The UTF-8 encodings for those code points are all three octets
// long, from 0xe2 0x90 0x80 through 0xe2 0x90 0xa1, so we initialize
// a QByteArray with the octets for the symbol for NUL and, for
// each of the octets from 0x00 through 0x1f, replace all
// occurrences of that value with that sequence, and then add 1 to
// the last octet of the sequence to get the symbol for the next
// value and continue.
//
QByteArray symbol(UTF8_SYMBOL_FOR_NULL);
for (char i = 0; i < ' '; i++) {
// Replace all occurrences of that value with that symbol.
ba.replace(i, symbol);
// Get the symbol for the next value.
symbol[2] = symbol[2] + 1;
}
// symbol now has the UTF-8 for the symbol for SP, as that follows
// the symbol for US; skip it - the next code point is for the
// symbol for DEL.
symbol[2] = symbol[2] + 1;
ba.replace((char)0x7f, symbol); // DEL
}
QByteArray ShowPacketBytesDialog::decodeQuotedPrintable(const guint8 *bytes, int length)
{
QByteArray ba;
for (int i = 0; i < length; i++) {
if (bytes[i] == '=' && i + 1 < length) {
if (bytes[i+1] == '\n') {
i++; // Soft line break LF
} else if (bytes[i+1] == '\r' && i + 2 < length && bytes[i+2] == '\n') {
i += 2; // Soft line break CRLF
} else if (g_ascii_isxdigit(bytes[i+1]) && i + 2 < length && g_ascii_isxdigit(bytes[i+2])) {
ba.append(QByteArray::fromHex(QByteArray((const char *)&bytes[i+1], 2)));
i += 2; // Valid Quoted-Printable sequence
} else {
// Illegal Quoted-Printable, just add byte
ba.append(bytes[i]);
}
} else {
ba.append(bytes[i]);
}
}
return ba;
}
void ShowPacketBytesDialog::rot13(QByteArray &ba)
{
for (int i = 0; i < ba.length(); i++) {
gchar upper = g_ascii_toupper(ba[i]);
if (upper >= 'A' && upper <= 'M') ba[i] = ba[i] + 13;
else if (upper >= 'N' && upper <= 'Z') ba[i] = ba[i] - 13;
}
}
void ShowPacketBytesDialog::updateFieldBytes(bool initialization)
{
int start = finfo_->start + start_;
int length = end_ - start_ + 1;
const guint8 *bytes;
gsize new_length = 0;
if (!finfo_->ds_tvb)
return;
switch (decode_as_) {
case DecodeAsNone:
bytes = tvb_get_ptr(finfo_->ds_tvb, start, -1);
field_bytes_ = QByteArray((const char *)bytes, length);
break;
case DecodeAsBASE64:
{
bytes = tvb_get_ptr(finfo_->ds_tvb, start, -1);
field_bytes_ = QByteArray((const char *)bytes, length);
if (field_bytes_.size() > 1) {
g_base64_decode_inplace(field_bytes_.data(), &new_length);
}
field_bytes_.resize((int)new_length);
break;
}
case DecodeAsCompressed:
{
tvbuff *uncompr_tvb = tvb_uncompress(finfo_->ds_tvb, start, length);
if (uncompr_tvb) {
bytes = tvb_get_ptr(uncompr_tvb, 0, -1);
field_bytes_ = QByteArray((const char *)bytes, tvb_reported_length(uncompr_tvb));
tvb_free(uncompr_tvb);
} else {
field_bytes_.clear();
}
break;
}
case DecodeAsHexDigits:
bytes = tvb_get_ptr(finfo_->ds_tvb, start, -1);
field_bytes_ = QByteArray::fromHex(QByteArray::fromRawData((const char *)bytes, length));
break;
case DecodeAsPercentEncoding:
{
bytes = tvb_get_ptr(finfo_->ds_tvb, start, -1);
#if GLIB_CHECK_VERSION(2, 66, 0)
GBytes *ba = g_uri_unescape_bytes((const char*)bytes, length, NULL, NULL);
if (ba != NULL) {
gsize size;
const char* data = (const char *)g_bytes_unref_to_data(ba, &size);
field_bytes_ = QByteArray(data, (int)size);
}
#else
GByteArray *ba = g_byte_array_new();
if (uri_to_bytes((const char*)bytes, ba, length)) {
field_bytes_ = QByteArray((const char *)ba->data, ba->len);
}
g_byte_array_free(ba, TRUE);
#endif
break;
}
case DecodeAsQuotedPrintable:
bytes = tvb_get_ptr(finfo_->ds_tvb, start, -1);
field_bytes_ = decodeQuotedPrintable(bytes, length);
break;
case DecodeAsROT13:
bytes = tvb_get_ptr(finfo_->ds_tvb, start, -1);
field_bytes_ = QByteArray((const char *)bytes, length);
rot13(field_bytes_);
break;
}
// Try loading as image at startup
if (initialization && image_.loadFromData(field_bytes_)) {
show_as_ = ShowAsImage;
ui->cbShowAs->blockSignals(true);
ui->cbShowAs->setCurrentIndex(ShowAsImage);
ui->cbShowAs->blockSignals(false);
}
updatePacketBytes();
}
void ShowPacketBytesDialog::updatePacketBytes(void)
{
static const gchar hexchars[16] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
ui->tePacketBytes->clear();
ui->tePacketBytes->setCurrentFont(mainApp->monospaceFont());
switch (show_as_) {
case ShowAsASCII:
{
QByteArray ba(field_bytes_);
sanitizeBuffer(ba, false);
ui->tePacketBytes->setLineWrapMode(QTextEdit::WidgetWidth);
ui->tePacketBytes->setPlainText(ba);
break;
}
case ShowAsASCIIandControl:
{
QByteArray ba(field_bytes_);
symbolizeBuffer(ba);
ui->tePacketBytes->setLineWrapMode(QTextEdit::WidgetWidth);
ui->tePacketBytes->setPlainText(ba);
break;
}
case ShowAsCArray:
{
int pos = 0, len = static_cast<int>(field_bytes_.length());
QString text("char packet_bytes[] = {\n");
while (pos < len) {
gchar hexbuf[256];
char *cur = hexbuf;
int i;
*cur++ = ' ';
for (i = 0; i < 8 && pos + i < len; i++) {
// Prepend entries with " 0x"
*cur++ = ' ';
*cur++ = '0';
*cur++ = 'x';
*cur++ = hexchars[(field_bytes_[pos + i] & 0xf0) >> 4];
*cur++ = hexchars[field_bytes_[pos + i] & 0x0f];
// Delimit array entries with a comma
if (pos + i + 1 < len)
*cur++ = ',';
}
pos += i;
*cur++ = '\n';
*cur = 0;
text.append(hexbuf);
}
text.append("};\n");
ui->tePacketBytes->setLineWrapMode(QTextEdit::NoWrap);
ui->tePacketBytes->setPlainText(text);
break;
}
case ShowAsRustArray:
{
int pos = 0, len = static_cast<int>(field_bytes_.length());
QString text("let packet_bytes: [u8; _] = [\n");
while (pos < len) {
gchar hexbuf[256];
char *cur = hexbuf;
int i;
*cur++ = ' ';
for (i = 0; i < 8 && pos + i < len; i++) {
// Prepend entries with " 0x"
*cur++ = ' ';
*cur++ = '0';
*cur++ = 'x';
*cur++ = hexchars[(field_bytes_[pos + i] & 0xf0) >> 4];
*cur++ = hexchars[field_bytes_[pos + i] & 0x0f];
// Delimit array entries with a comma
if (pos + i + 1 < len)
*cur++ = ',';
}
pos += i;
*cur++ = '\n';
*cur = 0;
text.append(hexbuf);
}
text.append("];\n");
ui->tePacketBytes->setLineWrapMode(QTextEdit::NoWrap);
ui->tePacketBytes->setPlainText(text);
break;
}
case ShowAsCodec:
{
// The QTextCodecs docs say that there's a flag to cause invalid
// characters to be replaced with null. It's unclear what happens
// in the default case; it might depend on the codec though it
// seems that in practice replacement characters are used.
QTextCodec *codec = QTextCodec::codecForName(ui->cbShowAs->currentText().toUtf8());
QByteArray ba(field_bytes_);
QString decoded = codec->toUnicode(ba);
ui->tePacketBytes->setLineWrapMode(QTextEdit::WidgetWidth);
ui->tePacketBytes->setPlainText(decoded);
break;
}
case ShowAsEBCDIC:
{
QByteArray ba(field_bytes_);
EBCDIC_to_ASCII((guint8*)ba.data(), static_cast<int>(ba.length()));
sanitizeBuffer(ba, false);
ui->tePacketBytes->setLineWrapMode(QTextEdit::WidgetWidth);
ui->tePacketBytes->setPlainText(ba);
break;
}
case ShowAsHexDump:
{
int pos = 0, len = static_cast<int>(field_bytes_.length());
// Use 16-bit offset if there are <= 65536 bytes, 32-bit offset if there are more
unsigned int offset_chars = (len - 1 <= 0xFFFF) ? 4 : 8;
QString text;
text.reserve((len / 16) * 80);
while (pos < len) {
char hexbuf[256];
char *cur = hexbuf;
int i;
// Dump offset
cur += snprintf(cur, 20, "%0*X ", offset_chars, pos);
// Dump bytes as hex
for (i = 0; i < 16 && pos + i < len; i++) {
*cur++ = hexchars[(field_bytes_[pos + i] & 0xf0) >> 4];
*cur++ = hexchars[field_bytes_[pos + i] & 0x0f];
*cur++ = ' ';
if (i == 7)
*cur++ = ' ';
}
while (cur < hexbuf + offset_chars + 53)
*cur++ = ' '; // Fill it up with space to ascii column
// Dump bytes as text
for (i = 0; i < 16 && pos + i < len; i++) {
if (g_ascii_isprint(field_bytes_[pos + i])) {
*cur++ = field_bytes_[pos + i];
} else {
memcpy(cur, UTF8_MIDDLE_DOT, sizeof(UTF8_MIDDLE_DOT) - 1);
cur += sizeof(UTF8_MIDDLE_DOT) - 1;
}
if (i == 7)
*cur++ = ' ';
}
pos += i;
*cur++ = '\n';
*cur = 0;
text.append(hexbuf);
}
ui->tePacketBytes->setLineWrapMode(QTextEdit::NoWrap);
ui->tePacketBytes->setPlainText(text);
break;
}
case ShowAsHTML:
ui->tePacketBytes->setLineWrapMode(QTextEdit::WidgetWidth);
ui->tePacketBytes->setHtml(field_bytes_);
break;
case ShowAsImage:
{
ui->lFind->setEnabled(false);
ui->leFind->setEnabled(false);
ui->bFind->setEnabled(false);
ui->tePacketBytes->setLineWrapMode(QTextEdit::WidgetWidth);
if (image_.loadFromData(field_bytes_)) {
ui->tePacketBytes->textCursor().insertImage(image_);
}
print_button_->setEnabled(!image_.isNull());
copy_button_->setEnabled(!image_.isNull());
save_as_button_->setEnabled(!image_.isNull());
break;
}
case ShowAsJson:
ui->tePacketBytes->setLineWrapMode(QTextEdit::NoWrap);
ui->tePacketBytes->setPlainText(QJsonDocument::fromJson(field_bytes_).toJson());
break;
case ShowAsYAML:
{
const int base64_raw_len = 57; // Encodes to 76 bytes, common in RFCs
int pos = 0, len = static_cast<int>(field_bytes_.length());
QString text("# Packet Bytes: !!binary |\n");
while (pos < len) {
QByteArray base64_data = field_bytes_.mid(pos, base64_raw_len);
pos += base64_data.length();
/* XXX: GCC 12.1 has a bogus stringop-overread warning using the Qt
* conversions from QByteArray to QString at -O2 and higher due to
* computing a branch that will never be taken.
*/
#if WS_IS_AT_LEAST_GNUC_VERSION(12,1)
DIAG_OFF(stringop-overread)
#endif
text.append(" " + base64_data.toBase64() + "\n");
#if WS_IS_AT_LEAST_GNUC_VERSION(12,1)
DIAG_ON(stringop-overread)
#endif
}
ui->tePacketBytes->setLineWrapMode(QTextEdit::NoWrap);
ui->tePacketBytes->setPlainText(text);
break;
}
case ShowAsRAW:
ui->tePacketBytes->setLineWrapMode(QTextEdit::WidgetWidth);
ui->tePacketBytes->setPlainText(field_bytes_.toHex());
break;
}
}
void ShowPacketBytesDialog::captureFileClosing()
{
finfo_ = NULL; // This will invalidate the source backend
WiresharkDialog::captureFileClosing();
}
void ShowPacketBytesDialog::captureFileClosed()
{
// We have lost the source backend and must disable all functions
// for manipulating decoding and displayed range.
ui->tePacketBytes->setMenusEnabled(false);
ui->lDecodeAs->setEnabled(false);
ui->cbDecodeAs->setEnabled(false);
ui->lStart->setEnabled(false);
ui->sbStart->setEnabled(false);
ui->lEnd->setEnabled(false);
ui->sbEnd->setEnabled(false);
WiresharkDialog::captureFileClosed();
}
void ShowPacketBytesTextEdit::contextMenuEvent(QContextMenuEvent *event)
{
QMenu *menu = createStandardContextMenu();
QAction *action;
menu->setAttribute(Qt::WA_DeleteOnClose);
menu->addSeparator();
action = menu->addAction(tr("Show Selected"));
action->setEnabled(menus_enabled_ && show_selected_enabled_ && textCursor().hasSelection());
connect(action, SIGNAL(triggered()), this, SLOT(showSelected()));
action = menu->addAction(tr("Show All"));
action->setEnabled(menus_enabled_);
connect(action, SIGNAL(triggered()), this, SLOT(showAll()));
menu->popup(event->globalPos());
}
void ShowPacketBytesTextEdit::showSelected()
{
QTextCursor cursor = textCursor();
int start = cursor.selectionStart();
int end = cursor.selectionEnd();
emit showSelected(start, end);
}
void ShowPacketBytesTextEdit::showAll()
{
emit showSelected(0, -1);
}
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