Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/pingtask.cc

+/*
+ *  Copyright 2011 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/libjingle/xmpp/pingtask.h"
+
+#include <memory>
+
+#include "webrtc/libjingle/xmpp/constants.h"
+#include "webrtc/base/logging.h"
+
+namespace buzz {
+
+PingTask::PingTask(buzz::XmppTaskParentInterface* parent,
+                   rtc::MessageQueue* message_queue,
+                   uint32_t ping_period_millis,
+                   uint32_t ping_timeout_millis)
+    : buzz::XmppTask(parent, buzz::XmppEngine::HL_SINGLE),
+      message_queue_(message_queue),
+      ping_period_millis_(ping_period_millis),
+      ping_timeout_millis_(ping_timeout_millis),
+      next_ping_time_(0),
+      ping_response_deadline_(0) {
+  ASSERT(ping_period_millis >= ping_timeout_millis);
+}
+
+bool PingTask::HandleStanza(const buzz::XmlElement* stanza) {
+  if (!MatchResponseIq(stanza, Jid(STR_EMPTY), task_id())) {
+    return false;
+  }
+
+  if (stanza->Attr(buzz::QN_TYPE) != buzz::STR_RESULT &&
+      stanza->Attr(buzz::QN_TYPE) != buzz::STR_ERROR) {
+    return false;
+  }
+
+  QueueStanza(stanza);
+  return true;
+}
+
+// This task runs indefinitely and remains in either the start or blocked
+// states.
+int PingTask::ProcessStart() {
+  if (ping_period_millis_ < ping_timeout_millis_) {
+    LOG(LS_ERROR) << "ping_period_millis should be >= ping_timeout_millis";
+    return STATE_ERROR;
+  }
+  const buzz::XmlElement* stanza = NextStanza();
+  if (stanza != NULL) {
+    // Received a ping response of some sort (don't care what it is).
+    ping_response_deadline_ = 0;
+  }
+
+  int64_t now = rtc::TimeMillis();
+
+  // If the ping timed out, signal.
+  if (ping_response_deadline_ != 0 && now >= ping_response_deadline_) {
+    SignalTimeout();
+    return STATE_ERROR;
+  }
+
+  // Send a ping if it's time.
+  if (now >= next_ping_time_) {
+    std::unique_ptr<buzz::XmlElement> stanza(
+        MakeIq(buzz::STR_GET, Jid(STR_EMPTY), task_id()));
+    stanza->AddElement(new buzz::XmlElement(QN_PING));
+    SendStanza(stanza.get());
+
+    ping_response_deadline_ = now + ping_timeout_millis_;
+    next_ping_time_ = now + ping_period_millis_;
+
+    // Wake ourselves up when it's time to send another ping or when the ping
+    // times out (so we can fire a signal).
+    message_queue_->PostDelayed(RTC_FROM_HERE, ping_timeout_millis_, this);
+    message_queue_->PostDelayed(RTC_FROM_HERE, ping_period_millis_, this);
+  }
+
+  return STATE_BLOCKED;
+}
+
+void PingTask::OnMessage(rtc::Message* msg) {
+  // Get the task manager to run this task so we can send a ping or signal or
+  // process a ping response.
+  Wake();
+}
+
+} // namespace buzz