Make clear that TIME_WAIT timeout expiration is managed solely by
tcp_tw_2msl_scan(). Sponsored by: Verisign, Inc.
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parent
902d2afd2a
commit
31a7749d4b
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=286873
@ -333,21 +333,29 @@ tcp_timer_2msl(void *xtp)
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/*
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* 2 MSL timeout in shutdown went off. If we're closed but
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* still waiting for peer to close and connection has been idle
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* too long, or if 2MSL time is up from TIME_WAIT, delete connection
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* control block. Otherwise, check again in a bit.
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* too long delete connection control block. Otherwise, check
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* again in a bit.
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*
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* If in TIME_WAIT state just ignore as this timeout is handled in
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* tcp_tw_2msl_scan().
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*
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* If fastrecycle of FIN_WAIT_2, in FIN_WAIT_2 and receiver has closed,
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* there's no point in hanging onto FIN_WAIT_2 socket. Just close it.
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* Ignore fact that there were recent incoming segments.
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*/
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if ((inp->inp_flags & INP_TIMEWAIT) != 0) {
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INP_WUNLOCK(inp);
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INP_INFO_RUNLOCK(&V_tcbinfo);
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CURVNET_RESTORE();
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return;
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}
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if (tcp_fast_finwait2_recycle && tp->t_state == TCPS_FIN_WAIT_2 &&
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tp->t_inpcb && tp->t_inpcb->inp_socket &&
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(tp->t_inpcb->inp_socket->so_rcv.sb_state & SBS_CANTRCVMORE)) {
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TCPSTAT_INC(tcps_finwait2_drops);
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tp = tcp_close(tp);
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} else {
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if (tp->t_state != TCPS_TIME_WAIT &&
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ticks - tp->t_rcvtime <= TP_MAXIDLE(tp)) {
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if (ticks - tp->t_rcvtime <= TP_MAXIDLE(tp)) {
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if (!callout_reset(&tp->t_timers->tt_2msl,
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TP_KEEPINTVL(tp), tcp_timer_2msl, tp)) {
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tp->t_timers->tt_flags &= ~TT_2MSL_RST;
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