blob: 3f533ae6e0868c3721dda70ecb5b0b7cb8618e89 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* pinger.c: centralised module that deals with sending TS_PING
* keepalives, to avoid replicating this code in multiple backends.
*/
#include "putty.h"
struct pinger_tag {
int interval;
int pending;
unsigned long next;
Backend *back;
void *backhandle;
};
static void pinger_schedule(Pinger pinger);
static void pinger_timer(void *ctx, unsigned long now)
{
Pinger pinger = (Pinger)ctx;
if (pinger->pending && now == pinger->next) {
pinger->back->special(pinger->backhandle, TS_PING);
pinger->pending = FALSE;
pinger_schedule(pinger);
}
}
static void pinger_schedule(Pinger pinger)
{
int next;
if (!pinger->interval) {
pinger->pending = FALSE; /* cancel any pending ping */
return;
}
next = schedule_timer(pinger->interval * TICKSPERSEC,
pinger_timer, pinger);
if (!pinger->pending || next < pinger->next) {
pinger->next = next;
pinger->pending = TRUE;
}
}
Pinger pinger_new(Conf *conf, Backend *back, void *backhandle)
{
Pinger pinger = snew(struct pinger_tag);
pinger->interval = conf_get_int(conf, CONF_ping_interval);
pinger->pending = FALSE;
pinger->back = back;
pinger->backhandle = backhandle;
pinger_schedule(pinger);
return pinger;
}
void pinger_reconfig(Pinger pinger, Conf *oldconf, Conf *newconf)
{
int newinterval = conf_get_int(newconf, CONF_ping_interval);
if (conf_get_int(oldconf, CONF_ping_interval) != newinterval) {
pinger->interval = newinterval;
pinger_schedule(pinger);
}
}
void pinger_free(Pinger pinger)
{
expire_timer_context(pinger);
sfree(pinger);
}
|
