arc: bluetooth: Implement socket opening

components/arc/bluetooth/arc_bluetooth_bridge.cc

Index: components/arc/bluetooth/arc_bluetooth_bridge.cc
diff --git a/components/arc/bluetooth/arc_bluetooth_bridge.cc b/components/arc/bluetooth/arc_bluetooth_bridge.cc
index 5042636b7465a062c41a05f768b4253c6e6f05a4..06b4ea7d372c5e0664796bb21b6d2f495989aa55 100644
--- a/components/arc/bluetooth/arc_bluetooth_bridge.cc
+++ b/components/arc/bluetooth/arc_bluetooth_bridge.cc
@@ -4,8 +4,10 @@
 
 #include "components/arc/bluetooth/arc_bluetooth_bridge.h"
 
+#include <bluetooth/bluetooth.h>
 #include <fcntl.h>
 #include <stddef.h>
+#include <sys/socket.h>
 
 #include <iomanip>
 #include <string>
@@ -28,6 +30,8 @@
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
 #include "device/bluetooth/bluetooth_remote_gatt_service.h"
+#include "mojo/edk/embedder/embedder.h"
+#include "mojo/edk/embedder/scoped_platform_handle.h"
 
 using device::BluetoothAdapter;
 using device::BluetoothAdapterFactory;
@@ -1023,6 +1027,29 @@ void ArcBluetoothBridge::ReadRemoteRssi(
   callback.Run(rssi);
 }
 
+void ArcBluetoothBridge::OpenBluetoothSocket(
+    const OpenBluetoothSocketCallback& callback) {
+  base::ScopedFD sock(socket(AF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM));
+  if (!sock.is_valid()) {
+    LOG(ERROR) << "Failed to open socket.";
+    callback.Run(mojo::ScopedHandle());
+    return;
+  }
+  mojo::edk::ScopedPlatformHandle platform_handle{
+      mojo::edk::PlatformHandle(sock.release())};
+  MojoHandle wrapped_handle;
+  MojoResult wrap_result = mojo::edk::CreatePlatformHandleWrapper(
+      std::move(platform_handle), &wrapped_handle);
+  if (wrap_result != MOJO_RESULT_OK) {
+    LOG(ERROR) << "Failed to wrap handles. Closing: " << wrap_result;
+    callback.Run(mojo::ScopedHandle());
+    return;
+  }
+  mojo::ScopedHandle scoped_handle{mojo::Handle(wrapped_handle)};
+
+  callback.Run(std::move(scoped_handle));
+}
+
 void ArcBluetoothBridge::OnDiscoveryError() {
   LOG(WARNING) << "failed to change discovery state";
 }