Add PepperAddressResolver.

remoting/client/plugin/pepper_address_resolver.cc

+// Copyright 2014 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/client/plugin/pepper_address_resolver.h"
+
+#include "base/logging.h"
+#include "ppapi/cpp/net_address.h"
+#include "remoting/client/plugin/pepper_util.h"
+
+namespace remoting {
+
+PepperAddressResolver::PepperAddressResolver(const pp::InstanceHandle& instance)
+    : resolver_(instance),
+      error_(0),
+      callback_factory_(this) {
+}
+
+PepperAddressResolver::~PepperAddressResolver() {
+}
+
+void PepperAddressResolver::Start(const rtc::SocketAddress& address) {
+  DCHECK(!address.hostname().empty());
+
+  PP_HostResolver_Hint hint;
+  hint.flags = 0;
+  hint.family = PP_NETADDRESS_FAMILY_UNSPECIFIED;
+  pp::CompletionCallback callback =
+      callback_factory_.NewCallback(&PepperAddressResolver::OnResolved);
+  int result = resolver_.Resolve(
+      address.hostname().c_str(), address.port(), hint, callback);
+  DCHECK_EQ(result, PP_OK_COMPLETIONPENDING);
+}
+
+bool PepperAddressResolver::GetResolvedAddress(int family,
+                                               rtc::SocketAddress* addr) const {
+  rtc::SocketAddress result;
+  switch (family) {
+    case AF_INET:
+      result = ipv4_address_;
+      break;
+    case AF_INET6:
+      result = ipv6_address_;
+      break;
+  }
+
+  if (result.IsNil())
+    return false;
+
+  *addr = result;
+  return true;
+}
+
+int PepperAddressResolver::GetError() const {
+  return error_;
+}
+
+void PepperAddressResolver::Destroy(bool wait) {
+  delete this;

[dcaiafa, 2014/08/08 19:45:20]

I assume that pp::CompletionCallbackFactory handles the cancelation, correct.
I.e., there is no risk of OnResolved getting called after Destroy()

[Sergey Ulanov, 2014/08/08 19:49:09]

Correct, that's the reason we need CompletionCallbackFactory.

+}
+
+void PepperAddressResolver::OnResolved(int32_t result) {
+  if (result < 0) {
+    error_ = EINVAL;
+    SignalDone(this);
+    return;
+  }
+
+  int count = resolver_.GetNetAddressCount();
+  for (int i = 0; i < count; ++i) {
+    pp::NetAddress address = resolver_.GetNetAddress(i);
+    if (address.GetFamily() == PP_NETADDRESS_FAMILY_IPV4 &&
+        ipv4_address_.IsNil()) {
+      PpNetAddressToSocketAddress(address, &ipv4_address_);
+    } else if (address.GetFamily() == PP_NETADDRESS_FAMILY_IPV6 &&
+               ipv6_address_.IsNil()) {
+      PpNetAddressToSocketAddress(address, &ipv6_address_);
+    }
+  }
+
+  SignalDone(this);
+}
+
+}  // namespace remoting