| // Copyright 2013 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_QUIC_CHROMIUM_PACKET_WRITER_H_ |
| #define NET_QUIC_QUIC_CHROMIUM_PACKET_WRITER_H_ |
| |
| #include <stddef.h> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "net/base/io_buffer.h" |
| #include "net/base/net_export.h" |
| #include "net/quic/core/quic_connection.h" |
| #include "net/quic/core/quic_packet_writer.h" |
| #include "net/quic/core/quic_packets.h" |
| #include "net/quic/core/quic_types.h" |
| #include "net/socket/datagram_client_socket.h" |
| |
| namespace net { |
| |
| // Chrome specific packet writer which uses a datagram Socket for writing data. |
| class NET_EXPORT_PRIVATE QuicChromiumPacketWriter : public QuicPacketWriter { |
| public: |
| // Delegate interface which receives notifications on socket write events. |
| class NET_EXPORT_PRIVATE Delegate { |
| public: |
| // Called when a socket write attempt results in a failure, so |
| // that the delegate may recover from it by perhaps rewriting the |
| // packet to a different socket. An implementation must return the |
| // return value from the rewrite attempt if there is one, and |
| // |error_code| otherwise. |
| virtual int HandleWriteError(int error_code, |
| scoped_refptr<StringIOBuffer> last_packet) = 0; |
| |
| // Called to propagate the final write error to the delegate. |
| virtual void OnWriteError(int error_code) = 0; |
| |
| // Called when the writer is unblocked due to a write completion. |
| virtual void OnWriteUnblocked() = 0; |
| }; |
| |
| QuicChromiumPacketWriter(); |
| // |socket| must outlive writer. |
| explicit QuicChromiumPacketWriter(Socket* socket); |
| ~QuicChromiumPacketWriter() override; |
| |
| // |delegate| must outlive writer. |
| void set_delegate(Delegate* delegate) { delegate_ = delegate; } |
| |
| void set_write_blocked(bool write_blocked) { write_blocked_ = write_blocked; } |
| |
| // Writes |packet| to the socket and returns the error code from the write. |
| WriteResult WritePacketToSocket(scoped_refptr<StringIOBuffer> packet); |
| |
| // QuicPacketWriter |
| WriteResult WritePacket(const char* buffer, |
| size_t buf_len, |
| const QuicIpAddress& self_address, |
| const QuicSocketAddress& peer_address, |
| PerPacketOptions* options) override; |
| bool IsWriteBlockedDataBuffered() const override; |
| bool IsWriteBlocked() const override; |
| void SetWritable() override; |
| QuicByteCount GetMaxPacketSize( |
| const QuicSocketAddress& peer_address) const override; |
| |
| void OnWriteComplete(int rv); |
| |
| private: |
| Socket* socket_; // Unowned. |
| Delegate* delegate_; // Unowned. |
| // When a write returns asynchronously, |packet_| stores the written |
| // packet until OnWriteComplete is called. |
| scoped_refptr<StringIOBuffer> packet_; |
| |
| // Whether a write is currently in flight. |
| bool write_blocked_; |
| |
| base::WeakPtrFactory<QuicChromiumPacketWriter> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(QuicChromiumPacketWriter); |
| }; |
| |
| } // namespace net |
| |
| #endif // NET_QUIC_QUIC_CHROMIUM_PACKET_WRITER_H_ |