chrome.mdns API

chrome/browser/extensions/api/dial/mdns_service.cc

+// Copyright (c) 2013 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 "chrome/browser/extensions/api/dial/mdns_service.h"
+
+#include "base/bind.h"
+
+using local_discovery::ServiceWatcher;
+using local_discovery::ServiceDiscoveryHostClientFactory;
+
+namespace extensions {
+
+
+MDNSService::MDNSService(std::string service_type)
+    : service_type_(service_type),
+      service_discovery_client_(ServiceDiscoveryHostClientFactory::GetClient()),
+      started_(false) {
+}
+
+MDNSService::~MDNSService() {}
+
+bool MDNSService::Start() {
+  if (!started_) {
+    service_watcher_ = service_discovery_client_->CreateServiceWatcher(
+           service_type_,
+           base::Bind(&MDNSService::OnServiceUpdated,
+                      base::Unretained(this)));
+    service_watcher_->Start();
+    started_ = true;
+  }
+  return true;
+}
+
+void MDNSService::Stop() {
+}
+
+void MDNSService::Discover(bool force_update) {
+  service_watcher_->DiscoverNewServices(force_update);
+}
+
+void MDNSService::OnServiceUpdated(
+    ServiceWatcher::UpdateType update,
+    const std::string& service_name) {
+  if (update != ServiceWatcher::UPDATE_REMOVED) {
+    // bool added = (update == ServiceWatcher::UPDATE_ADDED);
+  //   std::pair<ServiceResolverMap::iterator, bool> insert_result =
+  //       resolvers_.insert(make_pair(service_name,
+  //                                   linked_ptr<ServiceResolver>(NULL)));
+
+  //   // If there is already a resolver working on this service, don't add one.

[mark a. foltz, 2013/08/19 18:25:26]

Yeah, if we want to use the device we have to fire up a task to resolve the
service name.  This might not be necessary on Macs because the mDNS listener is
built into the default resolver chain at the OS level.

+  //   if (insert_result.second) {
+  //     scoped_ptr<ServiceResolver> resolver =
+  //         service_discovery_client_->CreateServiceResolver(
+  //         service_name, base::Bind(
+  //             &PrivetDeviceListerImpl::OnResolveComplete,
+  //             base::Unretained(this),
+  //             added));
+
+  //     insert_result.first->second.reset(resolver.release());
+  //     insert_result.first->second->StartResolving();
+  //   }
+  } else {
+  //   delegate_->DeviceRemoved(service_name);
+  }
+}
+
+}  // namespace extensions