Allow TransportController to create a QuicTransportChannel

webrtc/p2p/quic/quictransport.cc

+/*
+ *  Copyright 2016 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.
+ */
+
+#include "webrtc/p2p/quic/quictransport.h"
+
+#include "webrtc/p2p/base/p2ptransportchannel.h"
+
+namespace cricket {
+
+QuicTransport::QuicTransport(
+    const std::string& name,
+    PortAllocator* allocator,
+    const rtc::scoped_refptr<rtc::RTCCertificate>& certificate)
+    : Transport(name, allocator), local_certificate_(certificate) {}
+
+QuicTransport::~QuicTransport() {
+  DestroyAllChannels();
+}
+
+void QuicTransport::SetLocalCertificate(
+    const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) {
+  local_certificate_ = certificate;
+}
+bool QuicTransport::GetLocalCertificate(
+    rtc::scoped_refptr<rtc::RTCCertificate>* certificate) {
+  if (!local_certificate_) {
+    return false;
+  }
+  *certificate = local_certificate_;
+  return true;
+}
+
+bool QuicTransport::ApplyLocalTransportDescription(
+    TransportChannelImpl* channel,
+    std::string* error_desc) {
+  rtc::SSLFingerprint* local_fp =
+      local_description()->identity_fingerprint.get();
+  if (!VerifyCertificateFingerprint(local_certificate_.get(), local_fp,
+                                    error_desc)) {
+    return false;
+  }
+  if (!channel->SetLocalCertificate(local_certificate_)) {
+    return BadTransportDescription("Failed to set local identity.", error_desc);
+  }
+  return Transport::ApplyLocalTransportDescription(channel, error_desc);
+}
+
+bool QuicTransport::NegotiateTransportDescription(ContentAction action,
+                                                  std::string* error_desc) {
+  rtc::SSLFingerprint* local_fp =
+      remote_description()->identity_fingerprint.get();

[Taylor Brandstetter, 2016/04/12 22:33:11]

This should be local_description(), right? And again, it seems odd to
dereference local_description() when NegotiateRole hasn't yet checked if it's
set.

[pthatcher1, 2016/04/12 23:26:59]

Yeah, similar to what I said earlier.  We should do the check here and maybe
pass it into NegotiateRole.

[mikescarlett, 2016/04/13 00:58:24]

I added a check similar to DtlsTransport.

[mikescarlett, 2016/04/13 00:58:24]

Done.

+  rtc::SSLFingerprint* remote_fp =
+      remote_description()->identity_fingerprint.get();
+  if (!local_fp || !remote_fp) {
+    return BadTransportDescription("Fingerprints must be supplied for QUIC.",
+                                   error_desc);
+  }
+  remote_fingerprint_.reset(new rtc::SSLFingerprint(*remote_fp));
+  if (!NegotiateRole(action, &local_role_, error_desc)) {
+    return false;
+  }
+  // Now run the negotiation for the Transport class.
+  return Transport::NegotiateTransportDescription(action, error_desc);
+}
+
+QuicTransportChannel* QuicTransport::CreateTransportChannel(int component) {
+  P2PTransportChannel* ice_channel =
+      new P2PTransportChannel(name(), component, port_allocator());
+  return new QuicTransportChannel(ice_channel);
+}
+
+void QuicTransport::DestroyTransportChannel(TransportChannelImpl* channel) {
+  RTC_DCHECK(channel != nullptr);
+  QuicTransportChannel* quic_transport_channel =
+      static_cast<QuicTransportChannel*>(channel);
+  delete quic_transport_channel->channel();
+  delete quic_transport_channel;
+}
+
+bool QuicTransport::GetSslRole(rtc::SSLRole* ssl_role) const {
+  ASSERT(ssl_role != NULL);
+  *ssl_role = local_role_;
+  return true;
+}
+
+bool QuicTransport::ApplyNegotiatedTransportDescription(
+    TransportChannelImpl* channel,
+    std::string* error_desc) {
+  // Set ssl role and remote fingerprint. These are required for QUIC setup.
+  if (!channel->SetSslRole(local_role_)) {
+    return BadTransportDescription("Failed to set ssl role for the channel.",
+                                   error_desc);
+  }
+  // Apply remote fingerprint.
+  if (!channel->SetRemoteFingerprint(
+          remote_fingerprint_->algorithm,
+          reinterpret_cast<const uint8_t*>(remote_fingerprint_->digest.data()),
+          remote_fingerprint_->digest.size())) {
+    return BadTransportDescription("Failed to apply remote fingerprint.",
+                                   error_desc);
+  }
+  return Transport::ApplyNegotiatedTransportDescription(channel, error_desc);
+}
+
+}  // namespace cricket