file transfer: fix cancel

Change-Id: If13deebef78da9864522969c595beb5fc6a095de
Gitlab: #141

src/peer_connection.cpp

@@ -493,14 +493,7 @@ TlsSocketEndpoint::TlsSocketEndpoint(AbstractSocketEndpoint& tr,
 }
 
 
-TlsSocketEndpoint::~TlsSocketEndpoint() {
-    shutdown();
-}
-
-void
-TlsSocketEndpoint::shutdown() {
-    pimpl_->tr.shutdown();
-}
+TlsSocketEndpoint::~TlsSocketEndpoint() = default;
 
 bool
 TlsSocketEndpoint::isInitiator() const

src/peer_connection.h

@@ -187,7 +187,6 @@ public:
                     std::function<bool(const dht::crypto::Certificate&)>&& cert_check);
     ~TlsSocketEndpoint();
 
-    void shutdown() override;
     bool isReliable() const override { return true; }
     bool isInitiator() const override;
     int maxPayload() const override;

src/security/tls_session.cpp

@@ -735,9 +735,6 @@ TlsSession::TlsSessionImpl::cleanup()
     state_ = TlsSessionState::SHUTDOWN; // be sure to block any user operations
     stateCondition_.notify_all();
 
-    // This will stop current read of the ice_transport.cpp
-    transport_.shutdown();
-
     {
         std::lock_guard<std::mutex> lk(sessionMutex_);
         if (session_) {
@@ -752,6 +749,8 @@ TlsSession::TlsSessionImpl::cleanup()
 
     if (cookie_key_.data)
         gnutls_free(cookie_key_.data);
+
+    transport_.shutdown();
 }
 
 TlsSessionState