Use UrlRequest in PortAllocator.

remoting/protocol/port_allocator_base.cc

-// Copyright 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.
-
-#include "remoting/protocol/port_allocator_base.h"
-
-#include <algorithm>
-#include <map>
-
-#include "base/bind.h"
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_split.h"
-#include "net/base/escape.h"
-#include "remoting/protocol/network_settings.h"
-#include "remoting/protocol/transport_context.h"
-
-namespace {
-
-typedef std::map<std::string, std::string> StringMap;
-
-// Parses the lines in the result of the HTTP request that are of the form
-// 'a=b' and returns them in a map.
-StringMap ParseMap(const std::string& string) {
-  StringMap map;
-  base::StringPairs pairs;
-  base::SplitStringIntoKeyValuePairs(string, '=', '\n', &pairs);
-
-  for (auto& pair : pairs) {
-    map[pair.first] = pair.second;
-  }
-  return map;
-}
-
-}  // namespace
-
-namespace remoting {
-namespace protocol {
-
-const int PortAllocatorBase::kNumRetries = 5;
-
-PortAllocatorBase::PortAllocatorBase(
-    scoped_ptr<rtc::NetworkManager> network_manager,
-    scoped_ptr<rtc::PacketSocketFactory> socket_factory,
-    scoped_refptr<TransportContext> transport_context)
-    : BasicPortAllocator(network_manager.get(), socket_factory.get()),
-      network_manager_(std::move(network_manager)),
-      socket_factory_(std::move(socket_factory)),
-      transport_context_(transport_context) {
-  // We always use PseudoTcp to provide a reliable channel. It provides poor
-  // performance when combined with TCP-based transport, so we have to disable
-  // TCP ports. ENABLE_SHARED_UFRAG flag is specified so that the same username
-  // fragment is shared between all candidates.
-  int flags = cricket::PORTALLOCATOR_DISABLE_TCP |
-              cricket::PORTALLOCATOR_ENABLE_SHARED_UFRAG |
-              cricket::PORTALLOCATOR_ENABLE_IPV6;
-
-  NetworkSettings network_settings = transport_context_->network_settings();
-
-  if (!(network_settings.flags & NetworkSettings::NAT_TRAVERSAL_STUN))
-    flags |= cricket::PORTALLOCATOR_DISABLE_STUN;
-
-  if (!(network_settings.flags & NetworkSettings::NAT_TRAVERSAL_RELAY))
-    flags |= cricket::PORTALLOCATOR_DISABLE_RELAY;
-
-  set_flags(flags);
-  SetPortRange(network_settings.port_range.min_port,
-                       network_settings.port_range.max_port);
-}
-
-PortAllocatorBase::~PortAllocatorBase() {}
-
-PortAllocatorSessionBase::PortAllocatorSessionBase(
-    PortAllocatorBase* allocator,
-    const std::string& content_name,
-    int component,
-    const std::string& ice_ufrag,
-    const std::string& ice_pwd)
-    : BasicPortAllocatorSession(allocator,
-                                content_name,
-                                component,
-                                ice_ufrag,
-                                ice_pwd),
-      transport_context_(allocator->transport_context()),
-      weak_factory_(this) {}
-
-PortAllocatorSessionBase::~PortAllocatorSessionBase() {}
-
-void PortAllocatorSessionBase::GetPortConfigurations() {
-  transport_context_->GetJingleInfo(base::Bind(
-      &PortAllocatorSessionBase::OnJingleInfo, weak_factory_.GetWeakPtr()));
-}
-
-void PortAllocatorSessionBase::OnJingleInfo(
-    std::vector<rtc::SocketAddress> stun_hosts,
-    std::vector<std::string> relay_hosts,
-    std::string relay_token) {
-  stun_hosts_ = stun_hosts;
-  relay_hosts_ = relay_hosts;
-  relay_token_ = relay_token;
-
-  // Creating relay sessions can take time and is done asynchronously.
-  // Creating stun sessions could also take time and could be done aysnc also,
-  // but for now is done here and added to the initial config.  Note any later
-  // configs will have unresolved stun ips and will be discarded by the
-  // AllocationSequence.
-  cricket::ServerAddresses hosts;
-  for (const auto& host : stun_hosts_) {
-    hosts.insert(host);
-  }
-
-  cricket::PortConfiguration* config =
-      new cricket::PortConfiguration(hosts, username(), password());
-  ConfigReady(config);
-  TryCreateRelaySession();
-}
-
-void PortAllocatorSessionBase::TryCreateRelaySession() {
-  if (flags() & cricket::PORTALLOCATOR_DISABLE_RELAY)
-    return;
-
-  if (attempts_ == PortAllocatorBase::kNumRetries) {
-    LOG(ERROR) << "PortAllocator: maximum number of requests reached; "
-                  << "giving up on relay.";
-    return;
-  }
-
-  if (relay_hosts_.empty()) {
-    LOG(ERROR) << "PortAllocator: no relay hosts configured.";
-    return;
-  }
-
-  if (relay_token_.empty()){
-    LOG(WARNING) << "No relay auth token found.";
-    return;
-  }
-
-  // Choose the next host to try.
-  std::string host = relay_hosts_[attempts_ % relay_hosts_.size()];
-  attempts_++;
-  SendSessionRequest(host);
-}
-
-std::string PortAllocatorSessionBase::GetSessionRequestUrl() {
-  ASSERT(!username().empty());
-  ASSERT(!password().empty());
-  return "/create_session?username=" +
-         net::EscapeUrlEncodedData(username(), false) + "&password=" +
-         net::EscapeUrlEncodedData(password(), false);
-}
-
-void PortAllocatorSessionBase::ReceiveSessionResponse(
-    const std::string& response) {
-  StringMap map = ParseMap(response);
-
-  if (!username().empty() && map["username"] != username()) {
-    LOG(WARNING) << "Received unexpected username value from relay server.";
-  }
-  if (!password().empty() && map["password"] != password()) {
-    LOG(WARNING) << "Received unexpected password value from relay server.";
-  }
-
-  cricket::ServerAddresses hosts;
-  for (const auto& host : stun_hosts_) {
-    hosts.insert(host);
-  }
-
-  cricket::PortConfiguration* config =
-      new cricket::PortConfiguration(hosts, map["username"], map["password"]);
-
-  std::string relay_ip = map["relay.ip"];
-  std::string relay_port = map["relay.udp_port"];
-  unsigned relay_port_int;
-
-  if (!relay_ip.empty() && !relay_port.empty() &&
-      base::StringToUint(relay_port, &relay_port_int)) {
-    cricket::RelayServerConfig relay_config(cricket::RELAY_GTURN);
-    rtc::SocketAddress address(relay_ip, relay_port_int);
-    relay_config.ports.push_back(
-        cricket::ProtocolAddress(address, cricket::PROTO_UDP));
-    config->AddRelay(relay_config);
-  }
-
-  ConfigReady(config);
-}
-
-}  // namespace protocol
-}  // namespace remoting