TCP_FSM.H
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上传日期:2013-03-31
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- /*
- * 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
- */
- /*
- * 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_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.
- */
- 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