Tethering (#2676)

We can now enable tethering on the device. The user still has to reconnect to the wifi network after disabling tethering, the network manager is lazy. 
old-commit-hash: ec671d4741

selfdrive/ui/qt/offroad/wifi.cc

@@ -6,7 +6,7 @@
 #include <QLineEdit>
 
 #include "wifi.hpp"
-
+#include "widgets/toggle.hpp"
 
 void clearLayout(QLayout* layout) {
   while (QLayoutItem* item = layout->takeAt(0)) {
@@ -30,9 +30,31 @@ WifiUI::WifiUI(QWidget *parent, int page_length) : QWidget(parent), networks_per
 
   // Networks page
   wifi_widget = new QWidget;
+  QVBoxLayout* networkLayout = new QVBoxLayout;
+  QHBoxLayout *tethering_field = new QHBoxLayout;
+  tethering_field->addWidget(new QLabel("Enable Tethering"));
+  
+  Toggle* toggle_switch = new Toggle(this);
+  toggle_switch->setFixedSize(150, 100);
+  tethering_field->addWidget(toggle_switch);
+  if (wifi->tetheringEnabled()){
+    toggle_switch->togglePosition();
+  }
+  QObject::connect(toggle_switch, SIGNAL(stateChanged(int)), this, SLOT(toggleTethering(int)));
+
+  QWidget* tetheringWidget = new QWidget;
+  tetheringWidget->setLayout(tethering_field);
+  tetheringWidget->setFixedHeight(150);
+  networkLayout->addWidget(tetheringWidget);
+
+
   vlayout = new QVBoxLayout;
   wifi_widget->setLayout(vlayout);
-  swidget->addWidget(wifi_widget);
+  networkLayout->addWidget(wifi_widget);
+
+  QWidget* networkWidget = new QWidget;
+  networkWidget->setLayout(networkLayout);
+  swidget->addWidget(networkWidget);
 
   // Keyboard page
   input_field = new InputField();
@@ -163,11 +185,19 @@ void WifiUI::refresh() {
   vlayout->addWidget(w);
 }
 
+
+
+void WifiUI::toggleTethering(int enable){
+  if(enable){
+    wifi->enableTethering();
+  }else{
+    wifi->disableTethering();
+  }
+}
+
 void WifiUI::handleButton(QAbstractButton* button) {
   QPushButton* btn = static_cast<QPushButton*>(button);
   Network n = wifi->seen_networks[connectButtons->id(btn)];
-
-  input_field->setPromptText("Enter password for \"" + n.ssid + "\"");
   connectToNetwork(n);
 }
 
@@ -176,6 +206,7 @@ void WifiUI::connectToNetwork(Network n){
   if(n.security_type == SecurityType::OPEN){
     wifi->connect(n);
   } else if (n.security_type == SecurityType::WPA){
+    input_field->setPromptText("Enter password for \"" + n.ssid + "\"");
     QString password = getStringFromUser();
     if(password.size()){
       wifi->connect(n, password);

selfdrive/ui/qt/offroad/wifi.hpp

@@ -15,7 +15,7 @@ class WifiUI : public QWidget {
 
 public:
   int page;
-  explicit WifiUI(QWidget *parent = 0, int page_length = 6);
+  explicit WifiUI(QWidget *parent = 0, int page_length = 5);
 
 private:
   WifiManager* wifi;
@@ -30,12 +30,14 @@ private:
   QTimer *timer;
   QString text;
   QButtonGroup *connectButtons;
+  bool tetheringEnabled;
 
   void connectToNetwork(Network n);
   QString getStringFromUser();
 
 private slots:
   void handleButton(QAbstractButton* m_button);
+  void toggleTethering(int enable);
   void refresh();
   void receiveText(QString text);
   void wrongPassword(QString ssid);

selfdrive/ui/qt/offroad/wifiManager.cc

@@ -1,11 +1,26 @@
 #include <algorithm>
 #include <set>
+#include <stdlib.h>
+#include <iostream>
 #include "wifiManager.hpp"
+#include "common/params.h"
 
 /**
  * We are using a NetworkManager DBUS API : https://developer.gnome.org/NetworkManager/1.26/spec.html
  * */
 
+// https://developer.gnome.org/NetworkManager/1.26/nm-dbus-types.html#NM80211ApFlags
+const int NM_802_11_AP_FLAGS_PRIVACY = 0x00000001;
+
+// https://developer.gnome.org/NetworkManager/1.26/nm-dbus-types.html#NM80211ApSecurityFlags
+const int NM_802_11_AP_SEC_PAIR_WEP40      = 0x00000001;
+const int NM_802_11_AP_SEC_PAIR_WEP104     = 0x00000002;
+const int NM_802_11_AP_SEC_GROUP_WEP40     = 0x00000010;
+const int NM_802_11_AP_SEC_GROUP_WEP104    = 0x00000020;
+const int NM_802_11_AP_SEC_KEY_MGMT_PSK    = 0x00000100;
+const int NM_802_11_AP_SEC_KEY_MGMT_802_1X = 0x00000200;
+
+
 QString nm_path                = "/org/freedesktop/NetworkManager";
 QString nm_settings_path       = "/org/freedesktop/NetworkManager/Settings";
 
@@ -40,8 +55,10 @@ bool compare_by_strength(const Network &a, const Network &b){
   return a.strength > b.strength;
 }
 
+
 WifiManager::WifiManager(){
   qDBusRegisterMetaType<Connection>();
+  qDBusRegisterMetaType<IpConfig>();
   connecting_to_network = "";
   adapter = get_adapter();
   has_adapter = adapter != "";
@@ -54,6 +71,13 @@ WifiManager::WifiManager(){
     raw_adapter_state = get_response<uint>(response);
     change(raw_adapter_state, 0, 0);
   }
+
+  // Compute tethering ssid as "Weedle" + first 4 characters of a dongle id
+  tethering_ssid = "weedle";
+  std::string bytes = Params().get("DongleId");
+  if (bytes.length() >= 4){
+    tethering_ssid+="-"+QString::fromStdString(bytes.substr(0,4));
+  }
 }
 
 void WifiManager::refreshNetworks(){
@@ -116,9 +140,12 @@ SecurityType WifiManager::getSecurityType(QString path){
   int rsnflag = get_property(path, "RsnFlags").toInt();
   int wpa_props = wpaflag | rsnflag;
 
+  // obtained by looking at flags of networks in the office as reported by an Android phone
+  const int supports_wpa = NM_802_11_AP_SEC_PAIR_WEP40 | NM_802_11_AP_SEC_PAIR_WEP104 | NM_802_11_AP_SEC_GROUP_WEP40 | NM_802_11_AP_SEC_GROUP_WEP104 | NM_802_11_AP_SEC_KEY_MGMT_PSK;
+  
   if (sflag == 0){
     return SecurityType::OPEN;
-  } else if((sflag & 0x1) && (wpa_props & (0x333) && !(wpa_props & 0x200))) {
+  } else if ((sflag & NM_802_11_AP_FLAGS_PRIVACY) && (wpa_props & supports_wpa) && !(wpa_props & NM_802_11_AP_SEC_KEY_MGMT_802_1X)) {
     return SecurityType::WPA;
   } else {
     return SecurityType::UNSUPPORTED;
@@ -135,10 +162,7 @@ void WifiManager::connect(Network n, QString password){
 
 void WifiManager::connect(Network n, QString username, QString password){
   connecting_to_network = n.ssid;
-  QString active_ap = get_active_ap();
+  disconnect();
-  if(active_ap!="" && active_ap!="/"){
-    deactivate_connections(get_property(active_ap, "Ssid")); //Disconnect from any connected networks 
-  }
   clear_connections(n.ssid); //Clear all connections that may already exist to the network we are connecting
   connect(n.ssid, username, password, n.security_type);
 }
@@ -147,8 +171,8 @@ void WifiManager::connect(QByteArray ssid, QString username, QString password, S
   Connection connection;
   connection["connection"]["type"] = "802-11-wireless";
   connection["connection"]["uuid"] = QUuid::createUuid().toString().remove('{').remove('}');
-
   connection["connection"]["id"] = "OpenPilot connection "+QString::fromStdString(ssid.toStdString());
+  connection["connection"]["autoconnect-retries"] = 0;
 
   connection["802-11-wireless"]["ssid"] = ssid;
   connection["802-11-wireless"]["mode"] = "infrastructure";
@@ -163,7 +187,7 @@ void WifiManager::connect(QByteArray ssid, QString username, QString password, S
   connection["ipv6"]["method"] = "ignore";
 
   QDBusInterface nm_settings(nm_service, nm_settings_path, nm_settings_iface, bus);
-  QDBusReply<QDBusObjectPath> result = nm_settings.call("AddConnection", QVariant::fromValue(connection));
+  nm_settings.call("AddConnection", QVariant::fromValue(connection));
 }
 
 void WifiManager::deactivate_connections(QString ssid){
@@ -294,3 +318,52 @@ void WifiManager::change(unsigned int new_state,unsigned int previous_state,unsi
     connecting_to_network = "";
   }
 }
+
+void WifiManager::disconnect(){
+  QString active_ap = get_active_ap();
+  if (active_ap!="" && active_ap!="/"){
+    deactivate_connections(get_property(active_ap, "Ssid"));
+  }
+}
+
+//Functions for tethering 
+
+void WifiManager::enableTethering(){
+  disconnect();
+  Connection connection;
+  connection["connection"]["id"] = "Hotspot";
+  connection["connection"]["uuid"] = QUuid::createUuid().toString().remove('{').remove('}');
+  connection["connection"]["type"] = "802-11-wireless";
+  connection["connection"]["interface-name"] = "wlan0";
+
+  connection["802-11-wireless"]["band"] = "bg";
+  connection["802-11-wireless"]["mode"] = "ap";
+  connection["802-11-wireless"]["ssid"] = tethering_ssid.toUtf8();
+
+  connection["802-11-wireless-security"]["group"] = QStringList("ccmp");
+  connection["802-11-wireless-security"]["key-mgmt"] = "wpa-psk";
+  connection["802-11-wireless-security"]["pairwise"] = QStringList("ccmp");
+  connection["802-11-wireless-security"]["proto"] = QStringList("rsn");
+  connection["802-11-wireless-security"]["psk"] = "swagswagcomma";
+
+  connection["ipv4"]["method"] = "shared";
+  QMap<QString,QVariant> adress1;
+  adress1["address"] = "192.168.43.1";
+  adress1["prefix"] = 24u;
+  connection["ipv4"]["address-data"] = QVariant::fromValue(IpConfig() << adress1);
+  connection["ipv4"]["gateway"] = "192.168.43.1";
+  connection["ipv6"]["method"] = "ignore";
+
+  QDBusInterface nm_settings(nm_service, nm_settings_path, nm_settings_iface, bus);
+  nm_settings.call("AddConnection", QVariant::fromValue(connection));
+
+}
+
+void WifiManager::disableTethering(){
+  clear_connections(tethering_ssid);
+}
+
+bool WifiManager::tetheringEnabled(){
+  QString active_ap = get_active_ap();
+  return get_property(active_ap, "Ssid") == tethering_ssid;
+}

selfdrive/ui/qt/offroad/wifiManager.hpp

@@ -15,6 +15,7 @@ enum class ConnectedType{
 };
 
 typedef QMap<QString, QMap<QString, QVariant>> Connection;
+typedef QVector<QMap<QString, QVariant>> IpConfig;
 
 struct Network {
   QString path;
@@ -37,6 +38,11 @@ public:
   void connect(Network ssid);
   void connect(Network ssid, QString password);
   void connect(Network ssid, QString username, QString password);
+  // Tethering functions
+  
+  void enableTethering();
+  void disableTethering();
+  bool tetheringEnabled();
 
 private:
   QVector<QByteArray> seen_ssids;
@@ -44,6 +50,7 @@ private:
   QDBusConnection bus = QDBusConnection::systemBus();
   unsigned int raw_adapter_state;//Connection status https://developer.gnome.org/NetworkManager/1.26/nm-dbus-types.html#NMDeviceState
   QString connecting_to_network;
+  QString tethering_ssid;
 
   QString get_adapter();
   QList<Network> get_networks();
@@ -56,6 +63,7 @@ private:
   QByteArray get_property(QString network_path, QString property);
   unsigned int get_ap_strength(QString network_path);
   SecurityType getSecurityType(QString ssid);
+  void disconnect();
 
 private slots:
   void change(unsigned int new_state, unsigned int previous_state, unsigned int change_reason);