chore/mozilla upstream (#1136)

* cherry-pick commit 5a51e292d44ec0fb07867aff0401b4c2a8fca1e8 from mozila upstream

* cherry-pick commit e8ecb857dcfb804b7766a54e725b442fc6c0e661 from mozila upstream

* cherry-pick commit 16269ffa600905b09678014f64951748fb0ff8ad from mozila upstream

client/daemon/daemon.cpp

@@ -78,7 +78,7 @@ bool Daemon::activate(const InterfaceConfig& config) {
         return false;
       }
 
-      if (supportDnsUtils() && !dnsutils()->restoreResolvers()) {
+      if (!dnsutils()->restoreResolvers()) {
         return false;
       }
 
@@ -165,10 +165,6 @@ bool Daemon::activate(const InterfaceConfig& config) {
 }
 
 bool Daemon::maybeUpdateResolvers(const InterfaceConfig& config) {
-  if (!supportDnsUtils()) {
-    return true;
-  }
-
   if ((config.m_hopType == InterfaceConfig::MultiHopExit) ||
       (config.m_hopType == InterfaceConfig::SingleHop)) {
     QList<QHostAddress> resolvers;
@@ -423,13 +419,8 @@ bool Daemon::deactivate(bool emitSignals) {
   }
 
   // Cleanup DNS
-  if (supportDnsUtils() && !dnsutils()->restoreResolvers()) {
-    return false;
-  }
-
-  if (!wgutils()->interfaceExists()) {
-    logger.warning() << "Wireguard interface does not exist.";
-    return false;
+  if (!dnsutils()->restoreResolvers()) {
+    logger.warning() << "Failed to restore DNS resolvers.";
   }
 
   // Cleanup peers and routing
@@ -449,13 +440,9 @@ bool Daemon::deactivate(bool emitSignals) {
   }
   m_excludedAddrSet.clear();
 
-  // Delete the interface
-  if (!wgutils()->deleteInterface()) {
-    return false;
-  }
-
   m_connections.clear();
-  return true;
+  // Delete the interface
+  return wgutils()->deleteInterface();  
 }
 
 QString Daemon::logs() {

client/daemon/daemon.h

@@ -69,7 +69,6 @@ class Daemon : public QObject {
   virtual WireguardUtils* wgutils() const = 0;
   virtual bool supportIPUtils() const { return false; }
   virtual IPUtils* iputils() { return nullptr; }
-  virtual bool supportDnsUtils() const { return false; }
   virtual DnsUtils* dnsutils() { return nullptr; }
 
   static bool parseStringList(const QJsonObject& obj, const QString& name,

client/daemon/daemonlocalserverconnection.cpp

@@ -92,6 +92,17 @@ void DaemonLocalServerConnection::parseCommand(const QByteArray& data) {
 
   logger.debug() << "Command received:" << type;
 
+  // It is expected that sometimes the client will request backend logs
+  // before the first authentication. In these cases we just return empty
+  // logs.
+  if (type == "logs") {
+    QJsonObject obj;
+    obj.insert("type", "logs");
+    obj.insert("logs", "");
+    write(obj);
+    return;
+  }
+
   if (type == "activate") {
     InterfaceConfig config;
     if (!Daemon::parseConfig(obj, config)) {
@@ -115,8 +126,7 @@ void DaemonLocalServerConnection::parseCommand(const QByteArray& data) {
   if (type == "status") {
     QJsonObject obj = Daemon::instance()->getStatus();
     obj.insert("type", "status");
-    m_socket->write(QJsonDocument(obj).toJson(QJsonDocument::Compact));
-    m_socket->write("\n");
+    write(obj);
     return;
   }
 
@@ -124,8 +134,7 @@ void DaemonLocalServerConnection::parseCommand(const QByteArray& data) {
     QJsonObject obj;
     obj.insert("type", "logs");
     obj.insert("logs", Daemon::instance()->logs().replace("\n", "|"));
-    m_socket->write(QJsonDocument(obj).toJson(QJsonDocument::Compact));
-    m_socket->write("\n");
+    write(obj);
     return;
   }