Cache a ClientHello received before the DTLS handshake has started.

webrtc/p2p/base/dtlstransportchannel.h

Index: webrtc/p2p/base/dtlstransportchannel.h
diff --git a/webrtc/p2p/base/dtlstransportchannel.h b/webrtc/p2p/base/dtlstransportchannel.h
index b6c3cfd2510fba04b20e62c340d0c0fe79d4c59c..e898800b7c5cd30e85cb496dc2bb92de62128855 100644
--- a/webrtc/p2p/base/dtlstransportchannel.h
+++ b/webrtc/p2p/base/dtlstransportchannel.h
@@ -236,6 +236,11 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
   rtc::Buffer remote_fingerprint_value_;
   std::string remote_fingerprint_algorithm_;
 
+  // Cached DTLS packet that was received before we started the DTLS handshake.
+  // This could happen if a DTLS hello was received before the transport channel
+  // became writable, or before a remote fingerprint was received.
+  rtc::Buffer cached_dtls_packet_;

[juberti2, 2016/04/25 20:40:19]

Might want to call this cached_client_hello_, if we decide to only do this for
client hellos

[Taylor Brandstetter, 2016/04/26 22:55:58]

Done.

+
   RTC_DISALLOW_COPY_AND_ASSIGN(DtlsTransportChannelWrapper);
 };