// GattLocalCharacteristic
private async void OnCharacteristicWriteRequested(GattLocalCharacteristic characteristic, GattWriteRequestedEventArgs args)
{
Utils.Info("OnWriteRequested: {0}", args.Session.DeviceId.Id);
using (var derferral = args.GetDeferral())
{
var request = await args.GetRequestAsync().AsTask();
lock (mLockObject)
{
if ((mStatus != Status.Ready) && (mStatus != Status.Advertise))
{
Utils.Error("invalid status: {0}", mStatus.ToString());
request.RespondWithProtocolError(GattProtocolError.RequestNotSupported);
return;
}
var context = mSubscribedCentrals.Where(ctx => ctx.client.Session.DeviceId.Id == args.Session.DeviceId.Id).FirstOrDefault();
if (context == null)
{
Utils.Error("not subscribed");
request.RespondWithProtocolError(GattProtocolError.InsufficientAuthentication);
return;
}
if ((request.Option != GattWriteOption.WriteWithResponse) || (request.Offset != 0) || (request.Value == null))
{
Utils.Error("invalid parameter");
request.RespondWithProtocolError(GattProtocolError.InvalidPdu);
return;
}
request.Respond();
if (context.connectionId == 0) // Negotiation complete
{
Utils.Info("negotiation complete");
context.connectionId = mNextConnectionId++;
mCallback.OnConnect(context.connectionId);
}
else
{
ProcessReceiveBuffer(context, request.Value.AsBytes());
}
}
}
}
