Page MenuHomeFreeBSD
Differential D9519 Diff 24943 sys/netinet/tcp_timer.c

Changeset View

Standalone View

View Options

sys/netinet/tcp_timer.c

Show First 20 Lines • Show All 839 Lines • ▼ Show 20 Lines#endif
* (most of which have hopefully been retired) that have bad VJ * (most of which have hopefully been retired) that have bad VJ
* header compression code which trashes TCP segments containing * header compression code which trashes TCP segments containing
* unknown-to-them TCP options. * unknown-to-them TCP options.
*/ */
if (tcp_rexmit_drop_options && (tp->t_state == TCPS_SYN_SENT) && if (tcp_rexmit_drop_options && (tp->t_state == TCPS_SYN_SENT) &&
(tp->t_rxtshift == 3)) (tp->t_rxtshift == 3))
tp->t_flags &= ~(TF_REQ_SCALE|TF_REQ_TSTMP|TF_SACK_PERMIT); tp->t_flags &= ~(TF_REQ_SCALE|TF_REQ_TSTMP|TF_SACK_PERMIT);
/* /*
* If we backed off this far, our srtt estimate is probably bogus. * If we backed off this far, notify the L3 protocol that we're having
* Clobber it so we'll take the next rtt measurement as our srtt; * connection problems.
* move the current srtt into rttvar to keep the current
* retransmit times until then.
*/ */
if (tp->t_rxtshift > TCP_MAXRXTSHIFT / 4) { if (tp->t_rxtshift > TCP_RTT_INVALIDATE) {
#ifdef INET6 #ifdef INET6
if ((tp->t_inpcb->inp_vflag & INP_IPV6) != 0) if ((tp->t_inpcb->inp_vflag & INP_IPV6) != 0)
in6_losing(tp->t_inpcb); in6_losing(tp->t_inpcb);
else else
#endif #endif
in_losing(tp->t_inpcb); in_losing(tp->t_inpcb);
tp->t_rttvar += (tp->t_srtt >> TCP_RTT_SHIFT);
tp->t_srtt = 0;
} }
tp->snd_nxt = tp->snd_una; tp->snd_nxt = tp->snd_una;
tp->snd_recover = tp->snd_max; tp->snd_recover = tp->snd_max;
/* /*
* Force a segment to be sent. * Force a segment to be sent.
*/ */
tp->t_flags |= TF_ACKNOW; tp->t_flags |= TF_ACKNOW;
/* /*
▲ Show 20 Lines • Show All 168 Lines • Show Last 20 Lines