diff --git a/plugins/common/ChooseTransportMessage.cpp b/plugins/common/ChooseTransportMessage.cpp
new file mode 100644
index 0000000..08c315f
--- /dev/null
+++ b/plugins/common/ChooseTransportMessage.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+#include <cstdarg>
+#include <vector>
+#include "ChooseTransportMessage.h"
+#include "HostChannel.h"
+#include "scoped_ptr/scoped_ptr.h"
+
+ChooseTransportMessage::~ChooseTransportMessage() {
+}
+
+char ChooseTransportMessage::getType() const {
+  return TYPE;
+}
+
+/**
+ * Receive an ChooseTransport message from the channel (note that the message
+ * type has already been read).  Caller is responsible for destroying
+ * returned message.  Returns null on error.
+ */
+ChooseTransportMessage* ChooseTransportMessage::receive(HostChannel& channel) {
+  int length;
+  if (!channel.readInt(length)) {
+    // TODO(jat): error handling
+    printf("Failed to read transport\n");
+    return 0;
+  }
+  std::vector<std::string> transports;
+  for (int i = 0; i < length; ++i) {
+    std::string transport;
+    if (!channel.readString(transport)) {
+      // TODO(jat): error handling
+      printf("Failed to read transport\n");
+      return 0;
+    }
+    transports.push_back(transport);
+  }
+  return new ChooseTransportMessage(transports);
+}
+
+/**
+ * Send this ChooseTransport message on the channel.
+ */
+bool ChooseTransportMessage::send(HostChannel& channel,
+    const std::vector<std::string>& transports) {
+  if (!channel.sendByte(TYPE)) return false;
+  int n = transports.size();
+  if (!channel.sendInt(n)) return false;
+  for (int i = 0; i < n; ++i) {
+    if (!channel.sendString(transports[i])) return false;
+  }
+  return true;
+}