Define Stable API for WebRTC/Quartc

net/quic/quartc/quartc_session_interface.h

+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_QUIC_QUARTC_QUARTC_SESSION_INTERFACE_H_
+#define NET_QUIC_QUARTC_QUARTC_SESSION_INTERFACE_H_
+
+#include "net/quic/quartc/quartc_reliable_stream_interface.h"
+
+namespace net {
+class QuartcSessionInterface {
+ public:
+  virtual void StartCryptoHandshake() = 0;
+
+  // Only needed when using SRTP with QuicTransport
+  // Key Exporter interface from RFC 5705
+  // Arguments are:
+  // label               -- the exporter label.
+  //                        part of the RFC defining each exporter
+  //                        usage (IN)
+  // context/context_len -- a context to bind to for this connection indicating
+  //                        where and how the keying material will be used.
+  virtual bool ExportKeyingMaterial(const std::string& label,
+                                    const uint8_t* context,
+                                    size_t context_len,
+                                    uint8_t* result,
+                                    size_t result_len) = 0;
+
+  // For forward-compatibility
+  struct OutgoingStreamParameters {};
+  virtual QuartcReliableStreamInterface* CreateOutgoingStream(
+      const OutgoingStreamParameters& params) = 0;
+
+  // Implemented by WebRTC (ICE) code. Used by QUIC for sending and receiving
+  // (hopefully UDP) packets.
+  class Transport {
+   public:
+    // Called by the QuartcPacketWriter to check if the underneath transport
+    // writable.
+    virtual bool CanWrite() = 0;
+    // Called by the QuartcPacketWriter when writing packets to the network.
+    virtual int Write(const char* buffer, size_t buf_len) = 0;
+
+    // Implemented by QUIC code.
+    class Observer {
+      virtual void OnCanWrite() = 0;
+      virtual bool OnReceived(const char* data, size_t data_len) = 0;
+    };
+    virtual void SetObserver(Observer* observer) = 0;
+  };
+  virtual void SetTransport(Transport*) = 0;
+
+  // Implemented by WebRTC code.
+  class Observer {
+   public:
+    virtual void OnCryptoHandshakeComplete() = 0;
+
+    virtual void OnIncomingStream(QuartcReliableStreamInterface* stream) = 0;
+
+    // TODO(zhihuang) Create mapping from integer error code to WebRTC error
+    // code.
+    virtual void OnConnectionClosed(int error_code, bool from_remote) = 0;
+
+    // TODO(zhihuang): Proof verification.
+  };
+  virtual void SetObserver(Observer* observer) = 0;
+};
+}  // namespace net
+
+#endif  // NET_QUIC_QUARTC_QUARTC_SESSION_INTERFACE_H_