diff options
Diffstat (limited to 'sys/netinet/tcp_input.c')
| -rw-r--r-- | sys/netinet/tcp_input.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 59086ee521b..e9d4d1277de 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_input.c,v 1.33 1999/03/27 21:04:20 provos Exp $ */ +/* $OpenBSD: tcp_input.c,v 1.34 1999/04/21 21:38:58 provos Exp $ */ /* $NetBSD: tcp_input.c,v 1.23 1996/02/13 23:43:44 christos Exp $ */ /* @@ -875,6 +875,14 @@ findpcb: tcpstat.tcps_rcvackbyte += acked; sbdrop(&so->so_snd, acked); tp->snd_una = th->th_ack; +#if defined(TCP_SACK) || defined(TCP_NEWRENO) + /* + * We want snd_last to track snd_una so + * as to avoid sequence wraparound problems + * for very large transfers. + */ + tp->snd_last = tp->snd_una; +#endif /* TCP_SACK or TCP_NEWRENO */ #if defined(TCP_SACK) && defined(TCP_FACK) tp->snd_fack = tp->snd_una; tp->retran_data = 0; @@ -2978,7 +2986,11 @@ tcp_newreno(tp, th) tp->t_timer[TCPT_REXMT] = 0; tp->t_rtt = 0; tp->snd_nxt = th->th_ack; - tp->snd_cwnd = tp->t_maxseg; + /* + * Set snd_cwnd to one segment beyond acknowledged offset + * (tp->snd_una not yet updated when this function is called) + */ + tp->snd_cwnd = tp->t_maxseg + (th->th_ack - tp->snd_una); (void) tcp_output(tp); tp->snd_cwnd = ocwnd; if (SEQ_GT(onxt, tp->snd_nxt)) |