0,0 → 1,96 |
/*!\file netinet/tcp_fsm.h |
* TCP Finite State Machine. |
*/ |
|
/* |
* Copyright (c) 1982, 1986, 1993 |
* The Regents of the University of California. All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* 1. Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* 2. Redistributions in binary form must reproduce the above copyright |
* notice, this list of conditions and the following disclaimer in the |
* documentation and/or other materials provided with the distribution. |
* 3. All advertising materials mentioning features or use of this software |
* must display the following acknowledgement: |
* This product includes software developed by the University of |
* California, Berkeley and its contributors. |
* 4. Neither the name of the University nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* |
* @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93 |
* $Id: tcp_fsm.h,v 1.7 1995/11/14 20:34:34 phk Exp $ |
*/ |
|
#ifndef __NETINET_TCP_FSM_H |
#define __NETINET_TCP_FSM_H |
|
/* |
* TCP FSM state definitions. |
* Per RFC793, September, 1981. |
*/ |
|
#define TCP_NSTATES 11 |
|
#define TCPS_CLOSED 0 /* closed */ |
#define TCPS_LISTEN 1 /* listening for connection */ |
#define TCPS_SYN_SENT 2 /* active, have sent syn */ |
#define TCPS_SYN_RECEIVED 3 /* have send and received syn */ |
/* states < TCPS_ESTABLISHED are those where connections not established */ |
#define TCPS_ESTABLISHED 4 /* established */ |
#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ |
/* states > TCPS_CLOSE_WAIT are those where user has closed */ |
#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ |
#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ |
#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ |
/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ |
#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ |
#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 |
/* |
* Flags used when sending segments in tcp_output. |
* Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally |
* determined by state, with the proviso that TH_FIN is sent only |
* if all data queued for output is included in the segment. |
*/ |
static u_char tcp_outflags[TCP_NSTATES] = { |
TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, |
TH_ACK, TH_ACK, |
TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, |
}; |
#endif |
|
#ifdef KPROF |
int tcp_acounts[TCP_NSTATES][PRU_NREQ]; |
#endif |
|
#ifdef TCPSTATES |
char *tcpstates[] = { |
"CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", |
"ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", |
"LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", |
}; |
#endif |
|
#endif |