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Ignore FIN if not yet connected.

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This commit is contained in:
mycroft 1996-01-31 05:56:56 +00:00
parent ac01b2f206
commit 0a47ede0fe
1 changed files with 6 additions and 7 deletions
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13
sys/netinet/tcp_input.c
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@ -1,4 +1,4 @@
/* $NetBSD: tcp_input.c,v 1.21 1996/01/31 03:49:33 mycroft Exp $ */ /* $NetBSD: tcp_input.c,v 1.22 1996/01/31 05:56:56 mycroft Exp $ */
/* /*
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1994 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1994
@ -1207,7 +1207,7 @@ dodata: /* XXX */
* case PRU_RCVD). If a FIN has already been received on this * case PRU_RCVD). If a FIN has already been received on this
* connection then we just ignore the text. * connection then we just ignore the text.
*/ */
if ((ti->ti_len || (tiflags&TH_FIN)) && if ((ti->ti_len || (tiflags & TH_FIN)) &&
TCPS_HAVERCVDFIN(tp->t_state) == 0) { TCPS_HAVERCVDFIN(tp->t_state) == 0) {
TCP_REASS(tp, ti, m, so, tiflags); TCP_REASS(tp, ti, m, so, tiflags);
/* /*
@ -1223,9 +1223,10 @@ dodata: /* XXX */
/* /*
* If FIN is received ACK the FIN and let the user know * If FIN is received ACK the FIN and let the user know
* that the connection is closing. * that the connection is closing. Ignore a FIN received before
* the connection is fully established.
*/ */
if (tiflags & TH_FIN) { if ((tiflags & TH_FIN) && TCPS_HAVEESTABLISHED(tp->t_state)) {
if (TCPS_HAVERCVDFIN(tp->t_state) == 0) { if (TCPS_HAVERCVDFIN(tp->t_state) == 0) {
socantrcvmore(so); socantrcvmore(so);
tp->t_flags |= TF_ACKNOW; tp->t_flags |= TF_ACKNOW;
@ -1234,10 +1235,8 @@ dodata: /* XXX */
switch (tp->t_state) { switch (tp->t_state) {
/* /*
* In SYN_RECEIVED and ESTABLISHED STATES * In ESTABLISHED STATE enter the CLOSE_WAIT state.
* enter the CLOSE_WAIT state.
*/ */
case TCPS_SYN_RECEIVED:
case TCPS_ESTABLISHED: case TCPS_ESTABLISHED:
tp->t_state = TCPS_CLOSE_WAIT; tp->t_state = TCPS_CLOSE_WAIT;
break; break;