Forums Developers Writing C Code, DCC's Always Fail Midway

i'm writing a dcc bot for IRC in C, and no matter how hard i've tried i can't seem to make it work for mIRC, it works sending to every other client, but when i send files to people using mIRC the send fails midway into the transfer, do i need anything specific to send to mIRC clients or something?

The DCC Send/Get code has been stable for about a decade or two, so I haven't looked at it in a long time. If I remember correctly, and someone please let know if I've got this wrong, mIRC sends/expects ACKs of the number of bytes sent/received every so often. Is your code sending ACKs? If not, that could be the issue. Implementations can vary across clients, some of which may not care about sending/receiving ACKs.