1 | /* |
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2 | * Copyright (c) 1982, 1986, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | * |
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33 | * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93 |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _NETINET_TCP_FSM_H_ |
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38 | #define _NETINET_TCP_FSM_H_ |
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39 | |
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40 | /* |
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41 | * TCP FSM state definitions. |
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42 | * Per RFC793, September, 1981. |
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43 | */ |
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44 | |
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45 | #define TCP_NSTATES 11 |
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46 | |
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47 | #define TCPS_CLOSED 0 /* closed */ |
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48 | #define TCPS_LISTEN 1 /* listening for connection */ |
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49 | #define TCPS_SYN_SENT 2 /* active, have sent syn */ |
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50 | #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ |
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51 | /* states < TCPS_ESTABLISHED are those where connections not established */ |
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52 | #define TCPS_ESTABLISHED 4 /* established */ |
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53 | #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ |
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54 | /* states > TCPS_CLOSE_WAIT are those where user has closed */ |
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55 | #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ |
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56 | #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ |
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57 | #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ |
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58 | /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ |
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59 | #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ |
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60 | #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ |
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61 | |
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62 | #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) |
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63 | #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) |
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64 | #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) |
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65 | |
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66 | #ifdef TCPOUTFLAGS |
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67 | /* |
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68 | * Flags used when sending segments in tcp_output. |
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69 | * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally |
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70 | * determined by state, with the proviso that TH_FIN is sent only |
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71 | * if all data queued for output is included in the segment. |
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72 | */ |
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73 | static u_char tcp_outflags[TCP_NSTATES] = { |
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74 | TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, |
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75 | TH_ACK, TH_ACK, |
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76 | TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, |
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77 | }; |
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78 | #endif |
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79 | |
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80 | #ifdef KPROF |
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81 | int tcp_acounts[TCP_NSTATES][PRU_NREQ]; |
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82 | #endif |
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83 | |
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84 | #ifdef TCPSTATES |
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85 | char *tcpstates[] = { |
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86 | "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", |
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87 | "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", |
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88 | "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", |
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89 | }; |
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90 | #endif |
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91 | |
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92 | #endif |
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