1 tcp_fsm.h |
1 /* TCP_FSM.H |
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2 * |
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3 * Portions copyright (c) 1997-1999 Symbian Ltd. All rights reserved. |
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4 */ |
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5 |
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6 /* |
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7 * Copyright (c) 1982, 1986 Regents of the University of California. |
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8 * All rights reserved. The Berkeley software License Agreement |
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9 * specifies the terms and conditions for redistribution. |
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10 */ |
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11 |
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12 /** @file |
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13 @publishedAll |
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14 @released |
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15 */ |
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16 |
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17 /* |
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18 * TCP FSM state definitions. |
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19 * Per RFC793, September, 1981. |
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20 */ |
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21 |
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22 #ifndef _NETINET_TCP_FSM_H |
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23 #define _NETINET_TCP_FSM_H |
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24 |
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25 #ifdef __cplusplus |
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26 extern "C" { |
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27 #endif |
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28 |
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29 #define TCP_NSTATES 11 |
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30 |
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31 #define TCPS_CLOSED 0 /* closed */ |
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32 #define TCPS_LISTEN 1 /* listening for connection */ |
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33 #define TCPS_SYN_SENT 2 /* active, have sent syn */ |
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34 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ |
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35 /** |
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36 states < TCPS_ESTABLISHED are those where connections not established |
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37 */ |
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38 #define TCPS_ESTABLISHED 4 /* established */ |
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39 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ |
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40 |
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41 /** |
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42 states > TCPS_CLOSE_WAIT are those where user has closed |
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43 */ |
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44 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ |
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45 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ |
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46 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ |
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47 |
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48 /** |
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49 states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN |
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50 */ |
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51 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ |
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52 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ |
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53 |
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54 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) |
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55 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) |
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56 |
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57 #ifdef TCPOUTFLAGS |
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58 /** |
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59 Flags used when sending segments in tcp_output. |
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60 Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally |
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61 determined by state, with the proviso that TH_FIN is sent only |
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62 if all data queued for output is included in the segment. |
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63 */ |
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64 const u_char tcp_outflags[TCP_NSTATES] = { |
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65 TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, |
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66 TH_ACK, TH_ACK, |
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67 TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, |
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68 }; |
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69 #endif |
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70 |
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71 #ifdef TCPSTATES |
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72 |
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73 const char *tcpstates[] = { |
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74 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", |
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75 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", |
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76 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", |
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77 }; |
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78 #endif |
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79 |
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80 #ifdef __cplusplus |
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81 } |
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82 #endif |
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83 |
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84 #endif /* _NETINET_TCP_FSM_H */ |