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Obey RFC 793, section 3.4:

Browse Source 
Several examples of connection initiation follow.  Although these
  examples do not show connection synchronization using data-carrying
  segments, this is perfectly legitimate, so long as the receiving TCP
  doesn't deliver the data to the user until it is clear the data is
  valid (i.e., the data must be buffered at the receiver until the
  connection reaches the ESTABLISHED state).
This commit is contained in:
wollman 1994-08-26 22:27:16 +00:00
parent bc652e2092
commit 9489a8e21b
3 changed files with 6 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sys/netinet/tcp_fsm.h
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93
* $Id: tcp_fsm.h,v 1.2 1994/08/02 07:48:58 davidg Exp $
* $Id: tcp_fsm.h,v 1.3 1994/08/21 05:27:36 paul Exp $
*/
#ifndef _NETINET_TCP_FSM_H_
@ -60,6 +60,7 @@
#define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
#define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
#define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
#ifdef TCPOUTFLAGS

4
sys/netinet/tcp_input.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_input.c 8.5 (Berkeley) 4/10/94
* $Id: tcp_input.c,v 1.5 1994/08/02 07:49:01 davidg Exp $
* $Id: tcp_input.c,v 1.6 1994/08/18 22:35:32 wollman Exp $
*/
#ifndef TUBA_INCLUDE
@ -182,7 +182,7 @@ present:
* Present data to user, advancing rcv_nxt through
* completed sequence space.
*/
if (TCPS_HAVERCVDSYN(tp->t_state) == 0)
if (TCPS_HAVEESTABLISHED(tp->t_state) == 0)
return (0);
ti = tp->seg_next;
if (ti == (struct tcpiphdr *)tp || ti->ti_seq != tp->rcv_nxt)

4
sys/netinet/tcp_reass.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_input.c 8.5 (Berkeley) 4/10/94
* $Id: tcp_input.c,v 1.5 1994/08/02 07:49:01 davidg Exp $
* $Id: tcp_input.c,v 1.6 1994/08/18 22:35:32 wollman Exp $
*/
#ifndef TUBA_INCLUDE
@ -182,7 +182,7 @@ present:
* Present data to user, advancing rcv_nxt through
* completed sequence space.
*/
if (TCPS_HAVERCVDSYN(tp->t_state) == 0)
if (TCPS_HAVEESTABLISHED(tp->t_state) == 0)
return (0);
ti = tp->seg_next;
if (ti == (struct tcpiphdr *)tp || ti->ti_seq != tp->rcv_nxt)