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96ec2c2500
All the main backend structures - Ssh, Telnet, Pty, Serial etc - now describe structure types themselves rather than pointers to them. The same goes for the codebase-wide trait types Socket and Plug, and the supporting types SockAddr and Pinger. All those things that were typedefed as pointers are older types; the newer ones have the explicit * at the point of use, because that's what I now seem to be preferring. But whichever one of those is better, inconsistently using a mixture of the two styles is worse, so let's make everything consistent. A few types are still implicitly pointers, such as Bignum and some of the GSSAPI types; generally this is either because they have to be void *, or because they're typedefed differently on different platforms and aren't always pointers at all. Can't be helped. But I've got rid of the main ones, at least.
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
/*
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* pinger.c: centralised module that deals with sending SS_PING
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* keepalives, to avoid replicating this code in multiple backends.
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*/
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#include "putty.h"
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struct Pinger {
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int interval;
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int pending;
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unsigned long when_set, next;
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Backend *backend;
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};
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static void pinger_schedule(Pinger *pinger);
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static void pinger_timer(void *ctx, unsigned long now)
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{
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Pinger *pinger = (Pinger *)ctx;
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if (pinger->pending && now == pinger->next) {
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backend_special(pinger->backend, SS_PING, 0);
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pinger->pending = FALSE;
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pinger_schedule(pinger);
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}
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}
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static void pinger_schedule(Pinger *pinger)
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{
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unsigned long next;
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if (!pinger->interval) {
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pinger->pending = FALSE; /* cancel any pending ping */
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return;
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}
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next = schedule_timer(pinger->interval * TICKSPERSEC,
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pinger_timer, pinger);
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if (!pinger->pending ||
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(next - pinger->when_set) < (pinger->next - pinger->when_set)) {
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pinger->next = next;
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pinger->when_set = timing_last_clock();
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pinger->pending = TRUE;
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}
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}
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Pinger *pinger_new(Conf *conf, Backend *backend)
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{
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Pinger *pinger = snew(Pinger);
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pinger->interval = conf_get_int(conf, CONF_ping_interval);
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pinger->pending = FALSE;
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pinger->backend = backend;
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pinger_schedule(pinger);
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return pinger;
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}
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void pinger_reconfig(Pinger *pinger, Conf *oldconf, Conf *newconf)
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{
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int newinterval = conf_get_int(newconf, CONF_ping_interval);
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if (conf_get_int(oldconf, CONF_ping_interval) != newinterval) {
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pinger->interval = newinterval;
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pinger_schedule(pinger);
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}
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}
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void pinger_free(Pinger *pinger)
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{
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expire_timer_context(pinger);
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sfree(pinger);
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}
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