don't change DF or buffer sizes for ice-server

ice-server/src/IceServer.cpp

@@ -30,7 +30,7 @@ const int PEER_SILENCE_THRESHOLD_MSECS = 5 * 1000;
 IceServer::IceServer(int argc, char* argv[]) :
     QCoreApplication(argc, argv),
     _id(QUuid::createUuid()),
-    _serverSocket(),
+    _serverSocket(0, false),
     _activePeers()
 {
     // start the ice-server socket

libraries/networking/src/udt/Socket.cpp

@@ -29,9 +29,10 @@
 
 using namespace udt;
 
-Socket::Socket(QObject* parent) :
+Socket::Socket(QObject* parent, bool shouldChangeSocketOptions) :
     QObject(parent),
-    _synTimer(new QTimer(this))
+    _synTimer(new QTimer(this)),
+    _shouldChangeSocketOptions(shouldChangeSocketOptions)
 {
     connect(&_udpSocket, &QUdpSocket::readyRead, this, &Socket::readPendingDatagrams);
 
@@ -49,6 +50,8 @@ Socket::Socket(QObject* parent) :
 
 void Socket::bind(const QHostAddress& address, quint16 port) {
     _udpSocket.bind(address, port);
+
+    if (_shouldChangeSocketOptions) {
         setSystemBufferSizes();
 
 #if defined(Q_OS_LINUX)
@@ -61,6 +64,7 @@ void Socket::bind(const QHostAddress& address, quint16 port) {
         setsockopt(sd, IPPROTO_IP, IP_DONTFRAGMENT, &val, sizeof(val));
 #endif
     }
+}
 
 void Socket::rebind() {
     rebind(_udpSocket.localPort());

libraries/networking/src/udt/Socket.h

@@ -54,7 +54,7 @@ class Socket : public QObject {
 public:
     using StatsVector = std::vector<std::pair<HifiSockAddr, ConnectionStats::Stats>>;
     
-    Socket(QObject* object = 0);
+    Socket(QObject* object = 0, bool shouldChangeSocketOptions = true);
     
     quint16 localPort() const { return _udpSocket.localPort(); }
     
@@ -140,6 +140,8 @@ private:
 
     std::unique_ptr<CongestionControlVirtualFactory> _ccFactory { new CongestionControlFactory<TCPVegasCC>() };
 
+    bool _shouldChangeSocketOptions { true };
+    
     friend UDTTest;
 };