1 /* tcp_fsm.h 4.10 81/12/03 */ 2 3 /* 4 * TCP FSM state definitions. 5 * Per RFC793, September, 1981. 6 */ 7 8 #define TCP_NSTATES 11 9 10 #define TCPS_CLOSED 0 /* closed */ 11 #define TCPS_LISTEN 1 /* listening for connection */ 12 #define TCPS_SYN_SENT 2 /* active, have sent syn */ 13 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ 14 /* states < TCPS_ESTABLISHED are those where connections not established */ 15 #define TCPS_ESTABLISHED 4 /* established */ 16 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 17 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 18 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 19 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ 20 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 21 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 22 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 23 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 24 25 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 26 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 27 #define TCPS_OURFINNOTACKED(s) ((s) > TCPS_CLOSE_WAIT && (s) < TCPS_FIN_WAIT_2) 28 29 #ifdef TCPOUTFLAGS 30 /* 31 * Flags used when sending segments in tcp_output. 32 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 33 * determined by state, with the proviso that TH_FIN is sent only 34 * if all data queued for output is included in the segment. 35 */ 36 u_char tcp_outflags[TCP_NSTATES] = { 37 TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, 38 TH_ACK, TH_ACK, 39 TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, 40 }; 41 #endif 42 43 #ifdef KPROF 44 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 45 #endif 46 47 #ifdef TCPSTATES 48 char *tcpstates[] = { 49 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 50 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "FIN_WAIT_2", 51 "TIME_WAIT", "CLOSING", "LAST_ACK", 52 }; 53 #endif 54