> There seem to be two problematic cases. In the first, _both_ of these > conditions fire in tcp_input.c: > > else if (++tp->t_dupacks == tcprexmtthresh) { > > and > > if (tcp_do_newreno && SEQ_LT(th->th_ack, > tp->snd_recover)) {
yes, this is a problem because FreeBSD 4.[34 and before?] did not always initialized tp->snd_recover on the session startup and presented a problem when the initial segment sequence is greater than 0x7fffffff. The only other way to tigger this error is if you went half way through the sequence without a duplicate ack. We talked about this a little on -net and decided the prevention would have more overhead than it would effectively cure. FreeBSD 4.5 and greater fixed the initialization of snd_recover with the addition of the "syncache" code. FreeBSD 4.5 also fixed some serious socket errors that would cause more even greater performance problems. I suggest you upgrade. --mark tinguely. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message