Fix bug 574524: DtlsTransportChannel crashes after SSL closes remotely

webrtc/p2p/base/dtlstransportchannel.cc

 /*
  *  Copyright 2011 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 70 matching lines @@
 bool StreamInterfaceChannel::OnPacketReceived(const char* data, size_t size) {
   // We force a read event here to ensure that we don't overflow our queue.
   bool ret = packets_.WriteBack(data, size, NULL);
   RTC_CHECK(ret) << "Failed to write packet to queue.";
   if (ret) {
     SignalEvent(this, rtc::SE_READ, 0);
   }
   return ret;
 }
 
+void StreamInterfaceChannel::Close() {
+  packets_.Clear();
+  state_ = rtc::SS_CLOSED;
+}
+
 DtlsTransportChannelWrapper::DtlsTransportChannelWrapper(
     Transport* transport,
     TransportChannelImpl* channel)
     : TransportChannelImpl(channel->transport_name(), channel->component()),
       transport_(transport),
       worker_thread_(rtc::Thread::Current()),
       channel_(channel),
       downward_(NULL),
       ssl_role_(rtc::SSL_CLIENT),
       ssl_max_version_(rtc::SSL_PROTOCOL_DTLS_10) {
@@ skipping 529 matching lines @@
 
 void DtlsTransportChannelWrapper::Reconnect() {
   set_dtls_state(DTLS_TRANSPORT_NEW);
   set_writable(false);
   if (channel_->writable()) {
     OnWritableState(channel_);
   }
 }
 
 }  // namespace cricket