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Fix two bugs I accidently put into the syn code at the last minute

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(yes I had tested the hell out of this).

I've also temporarily disabled the code so that it behaves as it previously
did (tail drop's the syns) pending discussion with fenner about some socket
state flags that I don't fully understand.

Submitted by:	fenner
This commit is contained in:
Paul Traina 1996-10-11 19:26:42 +00:00
parent cdee44e4cb
commit a51764a8bf
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=18874
4 changed files with 40 additions and 28 deletions
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20
sys/kern/uipc_sockbuf.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)uipc_socket2.c 8.1 (Berkeley) 6/10/93
* $Id: uipc_socket2.c,v 1.14 1996/09/19 00:54:36 pst Exp $
* $Id: uipc_socket2.c,v 1.15 1996/10/07 04:32:27 pst Exp $
*/
#include <sys/param.h>
@ -109,8 +109,8 @@ soisconnected(so)
so->so_state |= SS_ISCONNECTED;
if (head && (so->so_state & SS_INCOMP)) {
TAILQ_REMOVE(&head->so_incomp, so, so_list);
head->so_incqlen--;
so->so_state &= ~SS_INCOMP;
so->so_incqlen--;
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
so->so_state |= SS_COMP;
sorwakeup(head);
@ -148,7 +148,10 @@ soisdisconnected(so)
/*
* Return a random connection that hasn't been serviced yet and
* is eligible for discard.
* is eligible for discard. There is a one in qlen chance that
* we will return a null, saying that there are no dropable
* requests. In this case, the protocol specific code should drop
* the new request. This insures fairness.
*
* This may be used in conjunction with protocol specific queue
* congestion routines.
@ -164,18 +167,17 @@ sodropablereq(head)
static long old_mono_secs;
static unsigned int cur_cnt, old_cnt;
so = TAILQ_FIRST(&head->so_incomp);
if (!so)
return (so);
qlen = head->so_incqlen;
if ((i = (mono_time.tv_sec - old_mono_secs)) != 0) {
old_mono_secs = mono_time.tv_sec;
old_cnt = cur_cnt / i;
cur_cnt = 0;
}
so = TAILQ_FIRST(&head->so_incomp);
if (!so)
return (so);
qlen = head->so_incqlen;
if (++cur_cnt > qlen || old_cnt > qlen) {
rnd = (314159 * rnd + 66329) & 0xffff;
j = ((qlen + 1) * rnd) >> 16;

20
sys/kern/uipc_socket2.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)uipc_socket2.c 8.1 (Berkeley) 6/10/93
* $Id: uipc_socket2.c,v 1.14 1996/09/19 00:54:36 pst Exp $
* $Id: uipc_socket2.c,v 1.15 1996/10/07 04:32:27 pst Exp $
*/
#include <sys/param.h>
@ -109,8 +109,8 @@ soisconnected(so)
so->so_state |= SS_ISCONNECTED;
if (head && (so->so_state & SS_INCOMP)) {
TAILQ_REMOVE(&head->so_incomp, so, so_list);
head->so_incqlen--;
so->so_state &= ~SS_INCOMP;
so->so_incqlen--;
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
so->so_state |= SS_COMP;
sorwakeup(head);
@ -148,7 +148,10 @@ soisdisconnected(so)
/*
* Return a random connection that hasn't been serviced yet and
* is eligible for discard.
* is eligible for discard. There is a one in qlen chance that
* we will return a null, saying that there are no dropable
* requests. In this case, the protocol specific code should drop
* the new request. This insures fairness.
*
* This may be used in conjunction with protocol specific queue
* congestion routines.
@ -164,18 +167,17 @@ sodropablereq(head)
static long old_mono_secs;
static unsigned int cur_cnt, old_cnt;
so = TAILQ_FIRST(&head->so_incomp);
if (!so)
return (so);
qlen = head->so_incqlen;
if ((i = (mono_time.tv_sec - old_mono_secs)) != 0) {
old_mono_secs = mono_time.tv_sec;
old_cnt = cur_cnt / i;
cur_cnt = 0;
}
so = TAILQ_FIRST(&head->so_incomp);
if (!so)
return (so);
qlen = head->so_incqlen;
if (++cur_cnt > qlen || old_cnt > qlen) {
rnd = (314159 * rnd + 66329) & 0xffff;
j = ((qlen + 1) * rnd) >> 16;

14
sys/netinet/tcp_input.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_input.c 8.12 (Berkeley) 5/24/95
* $Id: tcp_input.c,v 1.52 1996/10/07 04:32:39 pst Exp $
* $Id: tcp_input.c,v 1.53 1996/10/07 19:06:10 davidg Exp $
*/
#ifndef TUBA_INCLUDE
@ -415,11 +415,15 @@ findpcb:
so2 = sonewconn(so, 0);
if (so2 == 0) {
tcpstat.tcps_listendrop++;
#ifdef TCPSYNRED
so2 = sodropablereq(so);
if (so2)
tcp_drop(sototcpcb(so2), ETIMEDOUT);
else
goto drop;
if (so2) {
tcp_drop(sototcpcb(so2), ETIMEDOUT);
so2 = sonewconn(so, 0);
}
if (!so2)
#endif
goto drop;
}
so = so2;
/*

14
sys/netinet/tcp_reass.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_input.c 8.12 (Berkeley) 5/24/95
* $Id: tcp_input.c,v 1.52 1996/10/07 04:32:39 pst Exp $
* $Id: tcp_input.c,v 1.53 1996/10/07 19:06:10 davidg Exp $
*/
#ifndef TUBA_INCLUDE
@ -415,11 +415,15 @@ findpcb:
so2 = sonewconn(so, 0);
if (so2 == 0) {
tcpstat.tcps_listendrop++;
#ifdef TCPSYNRED
so2 = sodropablereq(so);
if (so2)
tcp_drop(sototcpcb(so2), ETIMEDOUT);
else
goto drop;
if (so2) {
tcp_drop(sototcpcb(so2), ETIMEDOUT);
so2 = sonewconn(so, 0);
}
if (!so2)
#endif
goto drop;
}
so = so2;
/*