PCjr Telnet Server Test

Sorry for the spam, but I'm back running again. The address is still the same: 97.86.233.68 . It will be up and running until I get sick of it, so please keep checking back and trying to break it. Here is what I think happened on this first crash: - New incoming connection send a SYN packet - PCjr sends SYN & ACK response - No response so SYN & ACK gets retransmited - Other side resends their SYN packet - PCjr incorrectly responds with an ACK to let the other side know what the correct sequence number is supposed to be. (The connection is not established yet.) The storage used to send the ACK packet is on the stack, and there is a BIG comment saying 'make sure this never gets queued anywhere, or you will have a dangling pointer into the stack'. I don't think it was queued anywhere (that path is good), but I did corrupt the stack because my code saw a socket in SYN_RECVD sending a new outgoing packet, and it went and politely filled in the TCP options in that packet. Which had no space to hold them, and thus corrupted the stack .. That's what I think at least. I put a little debug code to catch it if it happens again, and I'll try to simulate the same thing happening later on. It took about 72 connections and 40000 packets in and out to break it. Time to start again. :-( Thanks, Mike