How to abort a file transfer immediately?

tom_d1 · 2018-01-13T16:38:54

I am sending a file from one socket to another, and there are a lot of packets that are now in transit and in the socket send buffer. What I want to do is to abort the file transfer immediately (once the user clicks "Abort", the file transfer is aborted without any delay). If I closed the connection gracefully (by sending a FIN packet), then the FIN packet will only get processed by the other socket when the packets in transit and in the send buffer has been fully received by the other socket (which could take a long time). I think that the only way to do this is to close the connection ungracefully (by sending an RST packet). Am I correct or is there another way?