1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)tcp_fsm.h 7.3 (Berkeley) 06/29/88 18 */ 19 20 /* 21 * TCP FSM state definitions. 22 * Per RFC793, September, 1981. 23 */ 24 25 #define TCP_NSTATES 11 26 27 #define TCPS_CLOSED 0 /* closed */ 28 #define TCPS_LISTEN 1 /* listening for connection */ 29 #define TCPS_SYN_SENT 2 /* active, have sent syn */ 30 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ 31 /* states < TCPS_ESTABLISHED are those where connections not established */ 32 #define TCPS_ESTABLISHED 4 /* established */ 33 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 34 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 35 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 36 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ 37 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 38 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 39 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 40 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 41 42 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 43 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 44 45 #ifdef TCPOUTFLAGS 46 /* 47 * Flags used when sending segments in tcp_output. 48 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 49 * determined by state, with the proviso that TH_FIN is sent only 50 * if all data queued for output is included in the segment. 51 */ 52 u_char tcp_outflags[TCP_NSTATES] = { 53 TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, 54 TH_ACK, TH_ACK, 55 TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, 56 }; 57 #endif 58 59 #ifdef KPROF 60 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 61 #endif 62 63 #ifdef TCPSTATES 64 char *tcpstates[] = { 65 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 66 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 67 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 68 }; 69 #endif 70