diff options
| author | wollman <wollman@FreeBSD.org> | 1996-06-14 17:17:32 +0000 |
|---|---|---|
| committer | wollman <wollman@FreeBSD.org> | 1996-06-14 17:17:32 +0000 |
| commit | 99066eaf6d9a560cdc3e6b0de8c328e34cb45696 (patch) | |
| tree | 0848a9db412931bb8bcf03a59c7f3dc846dabd2a /sys/netinet/tcp_timewait.c | |
| parent | a6e6c783ca7402977911e66ddf2f6d12a36f65ea (diff) | |
| download | FreeBSD-src-99066eaf6d9a560cdc3e6b0de8c328e34cb45696.zip FreeBSD-src-99066eaf6d9a560cdc3e6b0de8c328e34cb45696.tar.gz | |
Better selection of initial retransmit timeout when no cached
RTT information is available.
Submitted by: kbracey@art.acorn.co.uk (Kevin Bracey)
(slightly modified by me)
Diffstat (limited to 'sys/netinet/tcp_timewait.c')
| -rw-r--r-- | sys/netinet/tcp_timewait.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c index c3100f3..09ae868 100644 --- a/sys/netinet/tcp_timewait.c +++ b/sys/netinet/tcp_timewait.c @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)tcp_subr.c 8.2 (Berkeley) 5/24/95 - * $Id: tcp_subr.c,v 1.28 1996/03/27 18:23:16 wollman Exp $ + * $Id: tcp_subr.c,v 1.29 1996/06/05 16:57:37 wollman Exp $ */ #include <sys/param.h> @@ -266,15 +266,13 @@ tcp_newtcpcb(inp) tp->t_inpcb = inp; /* * Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no - * rtt estimate. Set rttvar so that srtt + 2 * rttvar gives + * rtt estimate. Set rttvar so that srtt + 4 * rttvar gives * reasonable initial retransmit time. */ tp->t_srtt = TCPTV_SRTTBASE; - tp->t_rttvar = tcp_rttdflt * PR_SLOWHZ << TCP_RTTVAR_SHIFT; + tp->t_rttvar = ((TCPTV_RTOBASE - TCPTV_SRTTBASE) << TCP_RTTVAR_SHIFT) / 4; tp->t_rttmin = TCPTV_MIN; - TCPT_RANGESET(tp->t_rxtcur, - ((TCPTV_SRTTBASE >> 2) + (TCPTV_SRTTDFLT << 2)) >> 1, - TCPTV_MIN, TCPTV_REXMTMAX); + tp->t_rxtcur = TCPTV_RTOBASE; tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT; tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT; inp->inp_ip.ip_ttl = ip_defttl; |
