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wireshark/ui/qt/wireless_frame.cpp

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/* wireless_frame.cpp
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "wireless_frame.h"
#include <ui_wireless_frame.h>
#include "config.h"
#include <glib.h>
#include <capture/capture_session.h>
#include <capture/capture_sync.h>
#include <capture/ws80211_utils.h>
#include "ui/ws_ui_util.h"
#include <wsutil/utf8_entities.h>
#include <wsutil/802_11-utils.h>
#include "main_application.h"
#include <QProcess>
#include <QAbstractItemView>
// To do:
// - Disable or hide invalid channel types.
// - Push more status messages ("switched to...") to the status bar.
// - Add a "Decrypt in the driver" checkbox?
// - Check for frequency and channel type changes.
// - Find something appropriate to run from the helperToolButton on Linux.
// Questions:
// - From our perspective, what's the difference between "NOHT" and "HT20"?
const int update_interval_ = 1500; // ms
WirelessFrame::WirelessFrame(QWidget *parent) :
QFrame(parent),
ui(new Ui::WirelessFrame),
interfaces_(NULL),
capture_in_progress_(false),
iface_timer_id_(-1)
{
ui->setupUi(this);
ui->helperToolButton->hide();
if (ws80211_init() == WS80211_INIT_OK) {
ui->stackedWidget->setEnabled(true);
ui->stackedWidget->setCurrentWidget(ui->interfacePage);
#ifdef HAVE_AIRPCAP
// We should arguably add ws80211_get_helper_name and ws80211_get_helper_tooltip.
// This works for now and is translatable.
ui->helperToolButton->setText(tr("AirPcap Control Panel"));
ui->helperToolButton->setToolTip(tr("Open the AirPcap Control Panel"));
ui->helperToolButton->show();
ui->helperToolButton->setEnabled(ws80211_get_helper_path() != NULL);
#endif
} else {
ui->stackedWidget->setEnabled(false);
ui->stackedWidget->setCurrentWidget(ui->noWirelessPage);
}
ui->fcsFilterFrame->setVisible(ws80211_has_fcs_filter());
updateInterfaceList();
connect(mainApp, &MainApplication::localInterfaceEvent,
this, &WirelessFrame::handleInterfaceEvent);
}
WirelessFrame::~WirelessFrame()
{
ws80211_free_interfaces(interfaces_);
delete ui;
}
void WirelessFrame::setCaptureInProgress(bool capture_in_progress)
{
capture_in_progress_ = capture_in_progress;
updateWidgets();
}
int WirelessFrame::startTimer(int interval)
{
if (iface_timer_id_ != -1) {
killTimer(iface_timer_id_);
iface_timer_id_ = -1;
}
iface_timer_id_ = QFrame::startTimer(interval);
return iface_timer_id_;
}
void WirelessFrame::handleInterfaceEvent(const char *ifname _U_, int added, int up _U_)
{
if (!added) {
// Unfortunately when an interface removed event is received the network
// interface is still present for a while in the system.
// To overcome this update the interface list after a while.
startTimer(update_interval_);
} else {
updateInterfaceList();
}
}
void WirelessFrame::timerEvent(QTimerEvent *event)
{
if (event->timerId() != iface_timer_id_) {
QFrame::timerEvent(event);
return;
}
killTimer(iface_timer_id_);
iface_timer_id_ = -1;
updateInterfaceList();
}
// Check to see if the ws80211 interface list matches the one in our
// combobox. Rebuild ours if necessary and select the first interface if
// the current selection goes away.
void WirelessFrame::updateInterfaceList()
{
ws80211_free_interfaces(interfaces_);
interfaces_ = ws80211_find_interfaces();
const QString old_iface = ui->interfaceComboBox->currentText();
guint iface_count = 0;
bool list_changed = false;
// Don't interfere with user activity.
if (ui->interfaceComboBox->view()->isVisible()
|| ui->channelComboBox->view()->isVisible()
|| ui->channelTypeComboBox->view()->isVisible()
|| ui->fcsComboBox->view()->isVisible()) {
startTimer(update_interval_);
return;
}
if (interfaces_ && interfaces_->len > 0) {
iface_count = interfaces_->len;
}
if ((int) iface_count != ui->interfaceComboBox->count()) {
list_changed = true;
} else {
for (guint i = 0; i < iface_count; i++) {
struct ws80211_interface *iface = g_array_index(interfaces_, struct ws80211_interface *, i);
if (ui->interfaceComboBox->itemText(i).compare(iface->ifname) != 0) {
list_changed = true;
break;
}
}
}
if (list_changed) {
ui->interfaceComboBox->clear();
for (guint i = 0; i < iface_count; i++) {
struct ws80211_interface *iface = g_array_index(interfaces_, struct ws80211_interface *, i);
ui->interfaceComboBox->addItem(iface->ifname);
if (old_iface.compare(iface->ifname) == 0) {
ui->interfaceComboBox->setCurrentIndex(ui->interfaceComboBox->count() - 1);
}
}
}
if (ui->interfaceComboBox->currentText().compare(old_iface) != 0) {
getInterfaceInfo();
}
}
void WirelessFrame::updateWidgets()
{
bool enable_interface = false;
bool enable_channel = false;
bool enable_offset = false;
bool enable_show_fcs = false;
if (ui->interfaceComboBox->count() > 0) {
enable_interface = true;
enable_show_fcs = true;
}
if (enable_interface && ui->channelComboBox->count() > 0) {
enable_channel = true;
}
if (enable_channel && ui->channelTypeComboBox->count() > 1) {
enable_offset = true;
}
ui->interfaceComboBox->setEnabled(enable_interface);
ui->channelComboBox->setEnabled(enable_channel);
ui->channelTypeComboBox->setEnabled(enable_offset);
ui->fcsComboBox->setEnabled(!capture_in_progress_ && enable_show_fcs);
}
void WirelessFrame::on_helperToolButton_clicked()
{
const QString helper_path = ws80211_get_helper_path();
if (helper_path.isEmpty()) return;
QString command = QString("\"%1\"").arg(helper_path);
QProcess::startDetached(command, QStringList());
}
void WirelessFrame::on_prefsToolButton_clicked()
{
emit showWirelessPreferences("wlan");
}
void WirelessFrame::getInterfaceInfo()
{
const QString cur_iface = ui->interfaceComboBox->currentText();
ui->channelComboBox->clear();
ui->channelTypeComboBox->clear();
ui->fcsComboBox->clear();
if (cur_iface.isEmpty()) {
updateWidgets();
return;
}
for (guint i = 0; i < interfaces_->len; i++) {
struct ws80211_interface *iface = g_array_index(interfaces_, struct ws80211_interface *, i);
if (cur_iface.compare(iface->ifname) == 0) {
struct ws80211_iface_info iface_info;
QString units = " GHz";
ws80211_get_iface_info(iface->ifname, &iface_info);
for (guint j = 0; j < iface->frequencies->len; j++) {
guint32 frequency = g_array_index(iface->frequencies, guint32, j);
double ghz = frequency / 1000.0;
QString chan_str = QString("%1 " UTF8_MIDDLE_DOT " %2%3")
.arg(ieee80211_mhz_to_chan(frequency))
.arg(ghz, 0, 'f', 3)
.arg(units);
ui->channelComboBox->addItem(chan_str, frequency);
if ((int)frequency == iface_info.current_freq) {
ui->channelComboBox->setCurrentIndex(ui->channelComboBox->count() - 1);
}
units = QString();
}
// XXX - Do we need to make a distinction between WS80211_CHAN_NO_HT
// and WS80211_CHAN_HT20? E.g. is there a driver that won't capture
// HT frames if you use WS80211_CHAN_NO_HT?
ui->channelTypeComboBox->addItem("20 MHz", WS80211_CHAN_NO_HT);
if (iface_info.current_chan_type == WS80211_CHAN_NO_HT || iface_info.current_chan_type == WS80211_CHAN_HT20) {
ui->channelTypeComboBox->setCurrentIndex(0);
}
if (iface->channel_types & (1 << WS80211_CHAN_HT40MINUS)) {
ui->channelTypeComboBox->addItem("HT 40-", WS80211_CHAN_HT40MINUS);
if (iface_info.current_chan_type == WS80211_CHAN_HT40MINUS) {
ui->channelTypeComboBox->setCurrentIndex(ui->channelTypeComboBox->count() - 1);
}
}
if (iface->channel_types & (1 << WS80211_CHAN_HT40PLUS)) {
ui->channelTypeComboBox->addItem("HT 40+", WS80211_CHAN_HT40PLUS);
if (iface_info.current_chan_type == WS80211_CHAN_HT40PLUS) {
ui->channelTypeComboBox->setCurrentIndex(ui->channelTypeComboBox->count() - 1);
}
}
if (iface->channel_types & (1 << WS80211_CHAN_VHT80)) {
ui->channelTypeComboBox->addItem("VHT 80", WS80211_CHAN_VHT80);
if (iface_info.current_chan_type == WS80211_CHAN_VHT80) {
ui->channelTypeComboBox->setCurrentIndex(ui->channelTypeComboBox->count() - 1);
}
}
if (iface->channel_types & (1 << WS80211_CHAN_VHT160)) {
ui->channelTypeComboBox->addItem("VHT 160", WS80211_CHAN_VHT160);
if (iface_info.current_chan_type == WS80211_CHAN_VHT160) {
ui->channelTypeComboBox->setCurrentIndex(ui->channelTypeComboBox->count() - 1);
}
}
if (ws80211_has_fcs_filter()) {
ui->fcsComboBox->setCurrentIndex(iface_info.current_fcs_validation);
}
}
}
updateWidgets();
}
void WirelessFrame::setInterfaceInfo()
{
QString cur_iface = ui->interfaceComboBox->currentText();
int cur_chan_idx = ui->channelComboBox->currentIndex();
int cur_type_idx = ui->channelTypeComboBox->currentIndex();
int cur_fcs_idx = ui->fcsComboBox->currentIndex();
if (cur_iface.isEmpty() || cur_chan_idx < 0 || cur_type_idx < 0) return;
QString err_str;
#if defined(HAVE_LIBNL) && defined(HAVE_NL80211) && defined(HAVE_LIBPCAP)
int frequency = ui->channelComboBox->itemData(cur_chan_idx).toInt();
int chan_type = ui->channelTypeComboBox->itemData(cur_type_idx).toInt();
int bandwidth = getBandwidthFromChanType(chan_type);
int center_freq = getCenterFrequency(frequency, bandwidth);
const gchar *chan_type_s = ws80211_chan_type_to_str(chan_type);
gchar *center_freq_s = NULL;
gchar *data, *primary_msg, *secondary_msg;
int ret;
if (frequency < 0 || chan_type < 0) return;
if (center_freq != -1) {
center_freq_s = g_strdup(QString::number(center_freq).toUtf8().constData());
}
ret = sync_interface_set_80211_chan(cur_iface.toUtf8().constData(),
QString::number(frequency).toUtf8().constData(), chan_type_s,
center_freq_s, NULL,
&data, &primary_msg, &secondary_msg, main_window_update);
g_free(center_freq_s);
g_free(data);
g_free(primary_msg);
g_free(secondary_msg);
/* Parse the error msg */
if (ret) {
err_str = tr("Unable to set channel or offset.");
}
#elif defined(HAVE_AIRPCAP)
int frequency = ui->channelComboBox->itemData(cur_chan_idx).toInt();
int chan_type = ui->channelTypeComboBox->itemData(cur_type_idx).toInt();
if (frequency < 0 || chan_type < 0) return;
if (ws80211_set_freq(cur_iface.toUtf8().constData(), frequency, chan_type, -1, -1) != 0) {
err_str = tr("Unable to set channel or offset.");
}
#endif
if (cur_fcs_idx >= 0) {
if (ws80211_set_fcs_validation(cur_iface.toUtf8().constData(), (enum ws80211_fcs_validation) cur_fcs_idx) != 0) {
err_str = tr("Unable to set FCS validation behavior.");
}
}
if (!err_str.isEmpty()) {
mainApp->pushStatus(MainApplication::TemporaryStatus, err_str);
}
getInterfaceInfo();
}
int WirelessFrame::getCenterFrequency(int control_frequency, int bandwidth)
{
if (bandwidth < 80 || control_frequency < 5180)
return -1;
return ((control_frequency - 5180) / bandwidth) * bandwidth + 5180 + (bandwidth / 2) - 10;
}
int WirelessFrame::getBandwidthFromChanType(int chan_type)
{
switch (chan_type) {
case WS80211_CHAN_VHT80:
return 80;
case WS80211_CHAN_VHT160:
return 160;
default:
return -1;
}
}
void WirelessFrame::on_interfaceComboBox_activated(int)
{
getInterfaceInfo();
}
void WirelessFrame::on_channelComboBox_activated(int)
{
setInterfaceInfo();
}
void WirelessFrame::on_channelTypeComboBox_activated(int)
{
setInterfaceInfo();
}
void WirelessFrame::on_fcsComboBox_activated(int)
{
setInterfaceInfo();
}
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