File transfer receive callback prototype.
This function is called by the core upon an incoming File transfer is started. This function may be call several time for the same file in case of large file.
public delegate void OnFileTransferRecvDelegate(ChatMessage message, Content content, Buffer buffer);
LinphoneChatMessage message from which the body is received.
LinphoneContent incoming content information
LinphoneBuffer holding the received data. Empty buffer means end of file.