internal static extern void nim_signaling_control(IntPtr param, NimSignalingOptCbFunc cb, IntPtr user_data);
internal static extern void nim_signaling_create_channel2(ref NIMSignalingCreateParam param, NimSignalingOptCbFunc cb, IntPtr user_data);
internal static extern void nim_signaling_cancel_invite(IntPtr param, NimSignalingOptCbFunc cb, IntPtr user_data);
internal static extern void nim_signaling_create_channel(IntPtr param, NimSignalingOptCbFunc cb, IntPtr user_data);