usr/src/sys/netinet/tcp_fsm.h

/*      tcp_fsm.h       4.6     81/11/18        */

/*
 * TCP FSM state definitions.
 *
 * This TCP machine has two more states than suggested in RFC 793,
 * the extra states being L_SYN_RCVD and RCV_WAIT
 *
 * EXPLAIN THE EXTRA STATES.
 */

/*
 * States
 */
#define TCP_NSTATES     14

#define EFAILEC         -1              /* new state for failure, internally */
#define SAME            0               /* no state change, internally */
#define LISTEN          1               /* listening for connection */
#define SYN_SENT        2               /* active, have sent syn */
#define SYN_RCVD        3
#define L_SYN_RCVD      4
#define ESTAB           5               /* established */
#define FIN_W1          6               /* have closed and sent fin */
#define FIN_W2          7               /* have closed and rcvd ack of fin */
#define TIME_WAIT       8               /* in 2*msl quiet wait after close */
#define CLOSE_WAIT      9               /* rcvd fin, waiting for close */
#define CLOSING         10              /* closed xchd FIN; await FIN ACK */
#define LAST_ACK        11              /* had fin and close; await FIN ACK */
#define RCV_WAIT        12              /* waiting for user to drain data */
#define CLOSED          13              /* closed */

#ifdef KPROF
int     tcp_acounts[TCP_NSTATES][PRU_NREQ];
#endif

#ifdef TCPSTATES
char *tcpstates[] = {
        "SAME",         "LISTEN",       "SYN_SENT",     "SYN_RCVD",
        "L_SYN_RCVD",   "ESTAB",        "FIN_W1",       "FIN_W2",
        "TIME_WAIT",    "CLOSE_WAIT",   "CLOSING",      "LAST_ACK",
        "RCV_WAIT",     "CLOSED"
};
char *tcptimers[] = { "INIT", "REXMT", "REXMTTL", "PERSIST", "FINACK" };
#endif