Add a chromium based simple QUIC client.

net/tools/quic/quic_simple_client.h

Index: net/tools/quic/quic_simple_client.h
diff --git a/net/tools/quic/quic_simple_client.h b/net/tools/quic/quic_simple_client.h
index 38becd8fce404724661231367c45ceb9c28bab7b..0bab4e452c1940accd8b7c23e5bdaed7ec5bc886 100644
--- a/net/tools/quic/quic_simple_client.h
+++ b/net/tools/quic/quic_simple_client.h
@@ -5,8 +5,8 @@
 // A toy client, which connects to a specified port and sends QUIC
 // request to that endpoint.
 
-#ifndef NET_TOOLS_QUIC_QUIC_CLIENT_H_
-#define NET_TOOLS_QUIC_QUIC_CLIENT_H_
+#ifndef NET_TOOLS_QUIC_QUIC_SIMPLE_CLIENT_H_
+#define NET_TOOLS_QUIC_QUIC_SIMPLE_CLIENT_H_
 
 #include <string>
 
@@ -14,54 +14,53 @@
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_piece.h"
+#include "net/base/io_buffer.h"
 #include "net/base/ip_endpoint.h"
+#include "net/base/net_log.h"
+#include "net/http/http_response_headers.h"
 #include "net/quic/crypto/crypto_handshake.h"
 #include "net/quic/quic_config.h"
 #include "net/quic/quic_framer.h"
 #include "net/quic/quic_packet_creator.h"
-#include "net/tools/balsa/balsa_headers.h"
-#include "net/tools/epoll_server/epoll_server.h"
-#include "net/tools/quic/quic_client_session.h"
-#include "net/tools/quic/quic_spdy_client_stream.h"
+#include "net/tools/quic/quic_simple_client_session.h"
+#include "net/tools/quic/quic_simple_client_stream.h"
 
 namespace net {
 
+struct HttpRequestInfo;
 class ProofVerifier;
 class QuicServerId;
+class QuicConnectionHelper;
+class UDPClientSocket;
 
 namespace tools {
 
-class QuicEpollConnectionHelper;
-
 namespace test {
 class QuicClientPeer;
 }  // namespace test
 
-class QuicClient : public EpollCallbackInterface,
-                   public QuicDataStream::Visitor {
+class QuicSimpleClient : public QuicDataStream::Visitor {
  public:
   class ResponseListener {
    public:
     ResponseListener() {}
     virtual ~ResponseListener() {}
     virtual void OnCompleteResponse(QuicStreamId id,
-                                    const BalsaHeaders& response_headers,
+                                    const HttpResponseHeaders& response_headers,
                                     const std::string& response_body) = 0;
   };
 
   // Create a quic client, which will have events managed by an externally owned
   // EpollServer.
-  QuicClient(IPEndPoint server_address,
-             const QuicServerId& server_id,
-             const QuicVersionVector& supported_versions,
-             EpollServer* epoll_server);
-  QuicClient(IPEndPoint server_address,
-             const QuicServerId& server_id,
-             const QuicVersionVector& supported_versions,
-             const QuicConfig& config,
-             EpollServer* epoll_server);
-
-  ~QuicClient() override;
+  QuicSimpleClient(IPEndPoint server_address,
+                   const QuicServerId& server_id,
+                   const QuicVersionVector& supported_versions);
+  QuicSimpleClient(IPEndPoint server_address,
+                   const QuicServerId& server_id,
+                   const QuicVersionVector& supported_versions,
+                   const QuicConfig& config);
+
+  ~QuicSimpleClient() override;
 
   // Initializes the client to create a connection. Should be called exactly
   // once before calling StartConnect or Connect. Returns true if the
@@ -86,23 +85,23 @@ class QuicClient : public EpollCallbackInterface,
   void Disconnect();
 
   // Sends an HTTP request and does not wait for response before returning.
-  void SendRequest(const BalsaHeaders& headers,
+  void SendRequest(const HttpRequestInfo& headers,
                    base::StringPiece body,
                    bool fin);
 
   // Sends an HTTP request and waits for response before returning.
-  void SendRequestAndWaitForResponse(const BalsaHeaders& headers,
+  void SendRequestAndWaitForResponse(const HttpRequestInfo& headers,
                                      base::StringPiece body,
                                      bool fin);
 
   // Sends a request simple GET for each URL in |args|, and then waits for
   // each to complete.
-  void SendRequestsAndWaitForResponse(const
-      base::CommandLine::StringVector& args);
+  void SendRequestsAndWaitForResponse(
+      const base::CommandLine::StringVector& url_list);
 
-  // Returns a newly created QuicSpdyClientStream, owned by the
-  // QuicClient.
-  QuicSpdyClientStream* CreateReliableClientStream();
+  // Returns a newly created QuicSimpleClientStream, owned by the
+  // QuicSimpleClient.
+  QuicSimpleClientStream* CreateReliableClientStream();
 
   // Wait for events until the stream with the given ID is closed.
   void WaitForStreamToClose(QuicStreamId id);
@@ -114,20 +113,17 @@ class QuicClient : public EpollCallbackInterface,
   // Returns true if there are any outstanding requests.
   bool WaitForEvents();
 
-  // From EpollCallbackInterface
-  void OnRegistration(EpollServer* eps, int fd, int event_mask) override {}
-  void OnModification(int fd, int event_mask) override {}
-  void OnEvent(int fd, EpollEvent* event) override;
-  // |fd_| can be unregistered without the client being disconnected. This
-  // happens in b3m QuicProber where we unregister |fd_| to feed in events to
-  // the client from the SelectServer.
-  void OnUnregistration(int fd, bool replaced) override {}
-  void OnShutdown(EpollServer* eps, int fd) override {}
+  // Start the read loop on the socket.
+  void StartReading();
+
+  // Called on reads that complete asynchronously. Dispatches the packet and
+  // calls StartReading() again.
+  void OnReadComplete(int result);
 
   // QuicDataStream::Visitor
   void OnClose(QuicDataStream* stream) override;
 
-  QuicClientSession* session() { return session_.get(); }
+  QuicSimpleClientSession* session() { return session_.get(); }
 
   bool connected() const;
   bool goaway_received() const;
@@ -144,8 +140,6 @@ class QuicClient : public EpollCallbackInterface,
 
   const IPEndPoint& client_address() const { return client_address_; }
 
-  int fd() { return fd_; }
-
   const QuicServerId& server_id() const { return server_id_; }
 
   // This should only be set before the initial Connect()
@@ -191,16 +185,9 @@ class QuicClient : public EpollCallbackInterface,
 
  protected:
   virtual QuicConnectionId GenerateConnectionId();
-  virtual QuicEpollConnectionHelper* CreateQuicConnectionHelper();
+  virtual QuicConnectionHelper* CreateQuicConnectionHelper();
   virtual QuicPacketWriter* CreateQuicPacketWriter();
 
-  virtual int ReadPacket(char* buffer,
-                         int buffer_len,
-                         IPEndPoint* server_address,
-                         IPAddressNumber* client_ip);
-
-  EpollServer* epoll_server() { return epoll_server_; }
-
  private:
   friend class net::tools::test::QuicClientPeer;
 
@@ -220,12 +207,12 @@ class QuicClient : public EpollCallbackInterface,
   // and binds the socket to our address.
   bool CreateUDPSocket();
 
-  // If the socket has been created, then unregister and close() the FD.
-  void CleanUpUDPSocket();
-
   // Read a UDP packet and hand it to the framer.
   bool ReadAndProcessPacket();
 
+  //  Used by |helper_| to time alarms.
+  QuicClock clock_;
+
   // Address of the server.
   const IPEndPoint server_address_;
 
@@ -250,14 +237,16 @@ class QuicClient : public EpollCallbackInterface,
   scoped_ptr<QuicPacketWriter> writer_;
 
   // Session which manages streams.
-  scoped_ptr<QuicClientSession> session_;
-  // Listens for events on the client socket.
-  EpollServer* epoll_server_;
-  // UDP socket.
-  int fd_;
+  scoped_ptr<QuicSimpleClientSession> session_;
+
+  // UDP socket connected to the server.
+  scoped_ptr<UDPClientSocket> socket_;
+
+  // Connection on the socket. Owned by |session_|.
+  QuicConnection* connection_;
 
   // Helper to be used by created connections.
-  scoped_ptr<QuicEpollConnectionHelper> helper_;
+  scoped_ptr<QuicConnectionHelper> helper_;
 
   // Listens for full responses.
   scoped_ptr<ResponseListener> response_listener_;
@@ -289,10 +278,24 @@ class QuicClient : public EpollCallbackInterface,
   // Body of most recent response.
   std::string latest_response_body_;
 
-  DISALLOW_COPY_AND_ASSIGN(QuicClient);
+  bool read_pending_;
+
+  // The number of iterations of the read loop that have completed synchronously
+  // and without posting a new task to the message loop.
+  int synchronous_read_count_;
+
+  // The target buffer of the current read.
+  scoped_refptr<IOBufferWithSize> read_buffer_;
+
+  // The log used for the sockets.
+  NetLog net_log_;
+
+  base::WeakPtrFactory<QuicSimpleClient> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(QuicSimpleClient);
 };
 
 }  // namespace tools
 }  // namespace net
 
-#endif  // NET_TOOLS_QUIC_QUIC_CLIENT_H_
+#endif  // NET_TOOLS_QUIC_QUIC_SIMPLE_CLIENT_H_