Landing Recent QUIC Changes.

net/tools/quic/quic_client_bin.cc

 // Copyright (c) 2012 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.
 
-// A binary wrapper for QuicClient.  Connects to --hostname via --address
-// on --port and requests URLs specified on the command line.
-// Pass --secure to check the certificates using proof verifier.
-// Pass --initial_stream_flow_control_window to specify the size of the initial
-// stream flow control receive window to advertise to server.
-// Pass --initial_session_flow_control_window to specify the size of the initial
-// session flow control receive window to advertise to server.
+// A binary wrapper for QuicClient.
+// Connects to a host using QUIC, and sends requests to the provided URLS.
 //
-// For example:
-//  quic_client --address=127.0.0.1 --port=6122 --hostname=www.google.com
+// Example usage:
+//  quic_client --address=127.0.0.1 --port=6122 --hostname=www.google.com \
 //      http://www.google.com/index.html http://www.google.com/favicon.ico
 
 #include <iostream>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/base/ip_endpoint.h"
 #include "net/base/privacy_mode.h"
 #include "net/quic/quic_protocol.h"
 #include "net/quic/quic_server_id.h"
 #include "net/tools/epoll_server/epoll_server.h"
 #include "net/tools/quic/quic_client.h"
 
+std::string FLAGS_address = "127.0.0.1";
+// The IP or hostname the quic client will connect to.
+std::string FLAGS_hostname = "localhost";
 // The port the quic client will connect to.
 int32 FLAGS_port = 6121;
-std::string FLAGS_address = "127.0.0.1";
-// The hostname the quic client will connect to.
-std::string FLAGS_hostname = "localhost";
-// Size of the initial stream flow control receive window to advertise to
-// server.
-int32 FLAGS_initial_stream_flow_control_window = 100 * net::kMaxPacketSize;
-// Size of the initial session flow control receive window to advertise to
-// server.
-int32 FLAGS_initial_session_flow_control_window = 200 * net::kMaxPacketSize;
 // Check the certificates using proof verifier.
 bool FLAGS_secure = false;
+// QUIC version to speak, e.g. 21. Default value of 0 means 'use the latest
+// version'.
+int32 FLAGS_quic_version = 0;
 
 int main(int argc, char *argv[]) {
   base::CommandLine::Init(argc, argv);
   base::CommandLine* line = base::CommandLine::ForCurrentProcess();
   const base::CommandLine::StringVector& urls = line->GetArgs();
 
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   CHECK(logging::InitLogging(settings));
 
   if (line->HasSwitch("h") || line->HasSwitch("help") || urls.empty()) {
     const char* help_str =
         "Usage: quic_client [options] <url> ...\n"
         "\n"
         "At least one <url> with scheme must be provided "
         "(e.g. http://www.google.com/)\n\n"
         "Options:\n"
         "-h, --help                  show this help message and exit\n"
         "--port=<port>               specify the port to connect to\n"
         "--address=<address>         specify the IP address to connect to\n"
         "--host=<host>               specify the SNI hostname to use\n"
-        "--secure                    check certificates\n";
+        "--secure                    check certificates\n"
+        "--quic-version=<quic version> specify QUIC version to speak\n";
     std::cout << help_str;
     exit(0);
   }
   if (line->HasSwitch("port")) {
     int port;
     if (base::StringToInt(line->GetSwitchValueASCII("port"), &port)) {
       FLAGS_port = port;
     }
   }
   if (line->HasSwitch("address")) {
     FLAGS_address = line->GetSwitchValueASCII("address");
   }
   if (line->HasSwitch("hostname")) {
     FLAGS_hostname = line->GetSwitchValueASCII("hostname");
   }
   if (line->HasSwitch("secure")) {
     FLAGS_secure = true;
   }
+  if (line->HasSwitch("quic-version")) {
+    int quic_version;
+    if (base::StringToInt(line->GetSwitchValueASCII("quic-version"),
+                          &quic_version)) {
+      FLAGS_quic_version = quic_version;
+    }
+  }
   VLOG(1) << "server port: " << FLAGS_port
           << " address: " << FLAGS_address
           << " hostname: " << FLAGS_hostname
-          << " secure: " << FLAGS_secure;
+          << " secure: " << FLAGS_secure
+          << " quic-version: " << FLAGS_quic_version;
 
   base::AtExitManager exit_manager;
 
+  // Determine IP address to connect to from supplied hostname.
   net::IPAddressNumber addr;
   CHECK(net::ParseIPLiteralToNumber(FLAGS_address, &addr));
 
+  // Populate version vector with all versions if none specified.
+  net::QuicVersionVector versions;
+  if (FLAGS_quic_version == 0) {
+    versions = net::QuicSupportedVersions();
+  } else {
+    versions.push_back(static_cast<net::QuicVersion>(FLAGS_quic_version));
+  }
+
+  // Build the client, and try to connect.
+  VLOG(1) << "Conecting to " << FLAGS_hostname << ":" << FLAGS_port
+          << " with supported versions "
+          << QuicVersionVectorToString(versions);
+  net::EpollServer epoll_server;
   net::QuicConfig config;
   config.SetDefaults();
-  config.SetInitialFlowControlWindowToSend(
-      FLAGS_initial_session_flow_control_window);
-  config.SetInitialStreamFlowControlWindowToSend(
-      FLAGS_initial_stream_flow_control_window);
-  config.SetInitialSessionFlowControlWindowToSend(
-      FLAGS_initial_session_flow_control_window);
 
-  // TODO(rjshade): Set version on command line.
-  net::EpollServer epoll_server;
   net::tools::QuicClient client(
       net::IPEndPoint(addr, FLAGS_port),
       net::QuicServerId(FLAGS_hostname, FLAGS_port, FLAGS_secure,
                         net::PRIVACY_MODE_DISABLED),
-      net::QuicSupportedVersions(), true, config, &epoll_server);
+      versions, true, config, &epoll_server);
 
   client.Initialize();
 
-  if (!client.Connect()) return 1;
+  if (!client.Connect()) {
+    LOG(ERROR) << "Client failed to connect to host: "
+               << FLAGS_hostname << ":" << FLAGS_port;
+    return 1;
+  }
 
+  // Send a GET request for each supplied url.
   client.SendRequestsAndWaitForResponse(urls);
   return 0;
 }