Initial chrome.mdns API.

chrome/common/extensions/api/mdns/mdns_manifest_handler.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/common/extensions/api/mdns/mdns_manifest_handler.h"
+
+#include "base/lazy_instance.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "extensions/common/error_utils.h"
+
+namespace keys = extensions::manifest_keys;
+namespace errors = extension_manifest_errors;
+
+namespace extensions {
+
+namespace {
+// Whitelisted MDns service types.
+const char kCastDeviceType[] = "_googlecast._tcp.local";
+}
+
+MDnsInfo::MDnsInfo() {}
+MDnsInfo::~MDnsInfo() {}
+
+static base::LazyInstance<MDnsInfo> g_empty_mdns_info =
+    LAZY_INSTANCE_INITIALIZER;
+
+// static
+const MDnsInfo& MDnsInfo::GetMDnsInfo(const Extension* extension) {
+  MDnsInfo* info = static_cast<MDnsInfo*>(
+      extension->GetManifestData(keys::kMDnsServiceTypes));
+  return info ? *info : g_empty_mdns_info.Get();
+}
+
+MDnsManifestHandler::MDnsManifestHandler() {}
+MDnsManifestHandler::~MDnsManifestHandler() {}
+
+bool MDnsManifestHandler::Parse(Extension* extension, string16* error) {
+  scoped_ptr<MDnsInfo> info(new MDnsInfo);
+  const base::ListValue* list = NULL;
+  if (!extension->manifest()->GetList(keys::kMDnsServiceTypes, &list)) {
+    *error = ASCIIToUTF16(errors::kInvalidMDnsServiceTypes);
+    return false;
+  }
+
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    std::string service_type;
+    if (!list->GetString(i, &service_type) ||
+        service_type != kCastDeviceType) {
+      *error = ASCIIToUTF16(errors::kInvalidMDnsServiceTypes);
+      return false;
+    }
+    info->service_types.push_back(service_type);
+  }
+
+  extension->SetManifestData(keys::kMDnsServiceTypes, info.release());
+  return true;
+}
+
+const std::vector<std::string> MDnsManifestHandler::Keys() const {
+  return SingleKey(keys::kMDnsServiceTypes);
+}
+
+}  // namespace extensions