1 files changed, 161 insertions, 0 deletions
diff --git a/chromium/extensions/browser/api/cast_channel/cast_message_util.cc b/chromium/extensions/browser/api/cast_channel/cast_message_util.cc
new file mode 100644
index 00000000000..76fa2d0218a
--- /dev/null
+++ b/chromium/extensions/browser/api/cast_channel/cast_message_util.cc
@@ -0,0 +1,161 @@
+// 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 "extensions/browser/api/cast_channel/cast_message_util.h"
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/values.h"
+#include "extensions/common/api/cast_channel.h"
+#include "extensions/common/api/cast_channel/cast_channel.pb.h"
+
+namespace {
+static const char kAuthNamespace[] =
+    "urn:x-cast:com.google.cast.tp.deviceauth";
+// Sender and receiver IDs to use for platform messages.
+static const char kPlatformSenderId[] = "sender-0";
+static const char kPlatformReceiverId[] = "receiver-0";
+}  // namespace
+
+namespace extensions {
+namespace api {
+namespace cast_channel {
+
+bool MessageInfoToCastMessage(const MessageInfo& message,
+                              CastMessage* message_proto) {
+  DCHECK(message_proto);
+  if (!message.data)
+    return false;
+
+  message_proto->set_protocol_version(CastMessage_ProtocolVersion_CASTV2_1_0);
+  message_proto->set_source_id(message.source_id);
+  message_proto->set_destination_id(message.destination_id);
+  message_proto->set_namespace_(message.namespace_);
+  // Determine the type of the base::Value and set the message payload
+  // appropriately.
+  std::string data;
+  base::BinaryValue* real_value;
+  switch (message.data->GetType()) {
+    // JS string
+    case base::Value::TYPE_STRING:
+      if (message.data->GetAsString(&data)) {
+        message_proto->set_payload_type(CastMessage_PayloadType_STRING);
+        message_proto->set_payload_utf8(data);
+      }
+      break;
+    // JS ArrayBuffer
+    case base::Value::TYPE_BINARY:
+      real_value = static_cast<base::BinaryValue*>(message.data.get());
+      if (real_value->GetBuffer()) {
+        message_proto->set_payload_type(CastMessage_PayloadType_BINARY);
+        message_proto->set_payload_binary(real_value->GetBuffer(),
+                                          real_value->GetSize());
+      }
+      break;
+    default:
+      // Unknown value type.  message_proto will remain uninitialized because
+      // payload_type is unset.
+      break;
+  }
+  return message_proto->IsInitialized();
+}
+
+bool IsCastMessageValid(const CastMessage& message_proto) {
+  if (message_proto.namespace_().empty() || message_proto.source_id().empty() ||
+      message_proto.destination_id().empty()) {
+    return false;
+  }
+  return (message_proto.payload_type() == CastMessage_PayloadType_STRING &&
+          message_proto.has_payload_utf8()) ||
+         (message_proto.payload_type() == CastMessage_PayloadType_BINARY &&
+          message_proto.has_payload_binary());
+}
+
+bool CastMessageToMessageInfo(const CastMessage& message_proto,
+                              MessageInfo* message) {
+  DCHECK(message);
+  message->source_id = message_proto.source_id();
+  message->destination_id = message_proto.destination_id();
+  message->namespace_ = message_proto.namespace_();
+  // Determine the type of the payload and fill base::Value appropriately.
+  scoped_ptr<base::Value> value;
+  switch (message_proto.payload_type()) {
+  case CastMessage_PayloadType_STRING:
+    if (message_proto.has_payload_utf8())
+      value.reset(new base::StringValue(message_proto.payload_utf8()));
+    break;
+  case CastMessage_PayloadType_BINARY:
+    if (message_proto.has_payload_binary())
+      value.reset(base::BinaryValue::CreateWithCopiedBuffer(
+        message_proto.payload_binary().data(),
+        message_proto.payload_binary().size()));
+    break;
+  default:
+    // Unknown payload type. value will remain unset.
+    break;
+  }
+  if (value.get()) {
+    DCHECK(!message->data.get());
+    message->data.reset(value.release());
+    return true;
+  } else {
+    return false;
+  }
+}
+
+std::string CastMessageToString(const CastMessage& message_proto) {
+  std::string out("{");
+  out += "namespace = " + message_proto.namespace_();
+  out += ", sourceId = " + message_proto.source_id();
+  out += ", destId = " + message_proto.destination_id();
+  out += ", type = " + base::IntToString(message_proto.payload_type());
+  out += ", str = \"" + message_proto.payload_utf8() + "\"}";
+  return out;
+}
+
+std::string AuthMessageToString(const DeviceAuthMessage& message) {
+  std::string out("{");
+  if (message.has_challenge()) {
+    out += "challenge: {}, ";
+  }
+  if (message.has_response()) {
+    out += "response: {signature: (";
+    out += base::SizeTToString(message.response().signature().length());
+    out += " bytes), certificate: (";
+    out += base::SizeTToString(
+        message.response().client_auth_certificate().length());
+    out += " bytes)}";
+  }
+  if (message.has_error()) {
+    out += ", error: {";
+    out += base::IntToString(message.error().error_type());
+    out += "}";
+  }
+  out += "}";
+  return out;
+}
+
+void CreateAuthChallengeMessage(CastMessage* message_proto) {
+  CHECK(message_proto);
+  DeviceAuthMessage auth_message;
+  auth_message.mutable_challenge();
+  std::string auth_message_string;
+  auth_message.SerializeToString(&auth_message_string);
+
+  message_proto->set_protocol_version(CastMessage_ProtocolVersion_CASTV2_1_0);
+  message_proto->set_source_id(kPlatformSenderId);
+  message_proto->set_destination_id(kPlatformReceiverId);
+  message_proto->set_namespace_(kAuthNamespace);
+  message_proto->set_payload_type(CastMessage_PayloadType_BINARY);
+  message_proto->set_payload_binary(auth_message_string);
+}
+
+bool IsAuthMessage(const CastMessage& message) {
+  return message.namespace_() == kAuthNamespace;
+}
+
+}  // namespace cast_channel
+}  // namespace api
+}  // namespace extensions