OpenVPN
interval.c
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1 /*
2  * OpenVPN -- An application to securely tunnel IP networks
3  * over a single TCP/UDP port, with support for SSL/TLS-based
4  * session authentication and key exchange,
5  * packet encryption, packet authentication, and
6  * packet compression.
7  *
8  * Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2
12  * as published by the Free Software Foundation.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, write to the Free Software Foundation, Inc.,
21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22  */
23 
24 #ifdef HAVE_CONFIG_H
25 #include "config.h"
26 #elif defined(_MSC_VER)
27 #include "config-msvc.h"
28 #endif
29 
30 #include "syshead.h"
31 
32 #include "interval.h"
33 
34 #include "memdbg.h"
35 
36 void
37 interval_init(struct interval *top, int horizon, int refresh)
38 {
39  CLEAR(*top);
40  top->refresh = refresh;
41  top->horizon = horizon;
42 }
43 
44 bool
46  struct timeval *tv,
47  const int et_const_retry)
48 {
49  bool ret = false;
50  const time_t local_now = now;
51 
52  if (et->defined)
53  {
54  time_t wakeup = et->last - local_now + et->n;
55  if (wakeup <= 0)
56  {
57 #if INTERVAL_DEBUG
58  dmsg(D_INTERVAL, "EVENT event_timeout_trigger (%d) etcr=%d", et->n,
59  et_const_retry);
60 #endif
61  if (et_const_retry < 0)
62  {
63  et->last = local_now;
64  wakeup = et->n;
65  ret = true;
66  }
67  else
68  {
69  wakeup = et_const_retry;
70  }
71  }
72 
73  if (tv && wakeup < tv->tv_sec)
74  {
75 #if INTERVAL_DEBUG
76  dmsg(D_INTERVAL, "EVENT event_timeout_wakeup (%d/%d) etcr=%d",
77  (int) wakeup, et->n, et_const_retry);
78 #endif
79  tv->tv_sec = wakeup;
80  tv->tv_usec = 0;
81  }
82  }
83  return ret;
84 }
void interval_init(struct interval *top, int horizon, int refresh)
Definition: interval.c:37
#define CLEAR(x)
Definition: basic.h:33
#define D_INTERVAL
Definition: errlevel.h:153
bool event_timeout_trigger(struct event_timeout *et, struct timeval *tv, const int et_const_retry)
Definition: interval.c:45
time_t now
Definition: otime.c:36
interval_t refresh
Definition: interval.h:44
interval_t n
Definition: interval.h:139
#define dmsg
Definition: error.h:174
bool defined
Definition: interval.h:138
time_t last
Definition: interval.h:140
interval_t horizon
Definition: interval.h:45