tcp: Reimplement TCP_FASTKEEP socket option using per-pcb keepidle
[dragonfly.git] / sys / netinet / tcp_timer2.h
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1/*
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)tcp_timer.h 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/netinet/tcp_timer.h,v 1.18.2.1 2002/08/16 22:16:39 dillon Exp $
35 * $DragonFly: src/sys/netinet/tcp_timer.h,v 1.3 2003/08/23 11:18:00 rob Exp $
36 */
37
38#ifndef _NETINET_TCP_TIMER2_H_
39#define _NETINET_TCP_TIMER2_H_
40
41#ifdef _KERNEL
42
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43#ifndef _SYS_PARAM_H_
44#include <sys/param.h>
45#endif
46
47#ifndef _SYS_SYSTM_H_
48#include <sys/systm.h>
49#endif
50
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51#ifndef _SYS_THREAD2_H_
52#include <sys/thread2.h>
53#endif
54
55#ifndef _SYS_CALLOUT_H_
56#include <sys/callout.h>
57#endif
58
59#ifndef _NETINET_TCP_VAR_H_
60#include <netinet/tcp_var.h>
61#endif
62
63#ifndef _NETINET_TCP_TIMER_H_
64#include <netinet/tcp_timer.h>
65#endif
66
67static __inline void
68tcp_callout_stop(struct tcpcb *_tp, struct tcp_callout *_tc)
69{
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70 KKASSERT(_tp->tt_msg->tt_cpuid == mycpuid);
71
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72 crit_enter();
73 callout_stop(&_tc->tc_callout);
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74 _tp->tt_msg->tt_tasks &= ~_tc->tc_task;
75 _tp->tt_msg->tt_running_tasks &= ~_tc->tc_task;
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76 crit_exit();
77}
78
79static __inline void
80tcp_callout_reset(struct tcpcb *_tp, struct tcp_callout *_tc, int _to_ticks,
81 void (*_func)(void *))
82{
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83 KKASSERT(_tp->tt_msg->tt_cpuid == mycpuid);
84
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85 crit_enter();
86 callout_reset(&_tc->tc_callout, _to_ticks, _func, _tp);
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87 _tp->tt_msg->tt_tasks &= ~_tc->tc_task;
88 _tp->tt_msg->tt_running_tasks &= ~_tc->tc_task;
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89 crit_exit();
90}
91
92static __inline int
93tcp_callout_active(struct tcpcb *_tp, struct tcp_callout *_tc)
94{
95 int _act;
96
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97 KKASSERT(_tp->tt_msg->tt_cpuid == mycpuid);
98
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99 crit_enter();
100 _act = callout_active(&_tc->tc_callout);
2d42d2b0 101 if (!_act) {
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102 _act = (_tp->tt_msg->tt_tasks |
103 _tp->tt_msg->tt_running_tasks) & _tc->tc_task;
104 }
105 crit_exit();
106 return _act;
107}
108
109static __inline int
e6f59cda 110tcp_callout_pending(struct tcpcb *_tp, struct tcp_callout *_tc)
a48c5dd5 111{
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112 KKASSERT(_tp->tt_msg->tt_cpuid == mycpuid);
113
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114 return callout_pending(&_tc->tc_callout);
115}
116
117#endif /* !_KERNEL */
118
119#endif /* _NETINET_TCP_TIMER2_H_ */