1*23189Smckusick /* 2*23189Smckusick * Copyright (c) 1982 Regents of the University of California. 3*23189Smckusick * All rights reserved. The Berkeley software License Agreement 4*23189Smckusick * specifies the terms and conditions for redistribution. 5*23189Smckusick * 6*23189Smckusick * @(#)tcp_fsm.h 6.2 (Berkeley) 06/08/85 7*23189Smckusick */ 84725Swnj 94725Swnj /* 104924Swnj * TCP FSM state definitions. 115065Swnj * Per RFC793, September, 1981. 124725Swnj */ 134725Swnj 145065Swnj #define TCP_NSTATES 11 154725Swnj 165065Swnj #define TCPS_CLOSED 0 /* closed */ 175065Swnj #define TCPS_LISTEN 1 /* listening for connection */ 185065Swnj #define TCPS_SYN_SENT 2 /* active, have sent syn */ 195085Swnj #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ 205074Swnj /* states < TCPS_ESTABLISHED are those where connections not established */ 215065Swnj #define TCPS_ESTABLISHED 4 /* established */ 225085Swnj #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 235074Swnj /* states > TCPS_CLOSE_WAIT are those where user has closed */ 245085Swnj #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 255085Swnj #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ 265085Swnj #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 275085Swnj /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 285085Swnj #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 295085Swnj #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 304725Swnj 315085Swnj #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 325065Swnj #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 335065Swnj 345085Swnj #ifdef TCPOUTFLAGS 355085Swnj /* 365085Swnj * Flags used when sending segments in tcp_output. 375085Swnj * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 385173Swnj * determined by state, with the proviso that TH_FIN is sent only 395173Swnj * if all data queued for output is included in the segment. 405085Swnj */ 415085Swnj u_char tcp_outflags[TCP_NSTATES] = { 425085Swnj TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, 435085Swnj TH_ACK, TH_ACK, 445244Sroot TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, 455085Swnj }; 465085Swnj #endif 475085Swnj 484730Swnj #ifdef KPROF 494899Swnj int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 504725Swnj #endif 514725Swnj 525085Swnj #ifdef TCPSTATES 534725Swnj char *tcpstates[] = { 545065Swnj "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 555244Sroot "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 565244Sroot "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 574725Swnj }; 584725Swnj #endif 59