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set timeouts to time remaining rather than timeout duration

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This commit is contained in:
Matt Johnston 2015-08-03 23:05:43 +08:00
parent ce59260ee9
commit 2e60d20a76
1 changed files with 30 additions and 11 deletions
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41
common-session.c
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@ -532,20 +532,39 @@ static void checktimeouts() {
}
}
static void update_timeout(long limit, long now, long last_event, long * timeout) {
TRACE(("update_timeout limit %ld, now %ld, last %ld, timeout %ld",
limit, now, last_event, *timeout))
if (last_event > 0 && limit > 0) {
*timeout = MIN(*timeout, last_event+limit-now);
TRACE(("update to %ld", *timeout))
}
}
static long select_timeout() {
/* determine the minimum timeout that might be required, so
as to avoid waking when unneccessary */
long ret = LONG_MAX;
if (KEX_REKEY_TIMEOUT > 0)
ret = MIN(KEX_REKEY_TIMEOUT, ret);
/* AUTH_TIMEOUT is only relevant before authdone */
if (ses.authstate.authdone != 1 && AUTH_TIMEOUT > 0)
ret = MIN(AUTH_TIMEOUT, ret);
if (opts.keepalive_secs > 0)
ret = MIN(opts.keepalive_secs, ret);
if (opts.idle_timeout_secs > 0)
ret = MIN(opts.idle_timeout_secs, ret);
return ret;
long timeout = LONG_MAX;
long now = monotonic_now();
update_timeout(KEX_REKEY_TIMEOUT, now, ses.kexstate.lastkextime, &timeout);
if (ses.authstate.authdone != 1 && IS_DROPBEAR_SERVER) {
/* AUTH_TIMEOUT is only relevant before authdone */
update_timeout(AUTH_TIMEOUT, now, ses.connect_time, &timeout);
}
update_timeout(opts.keepalive_secs, now,
MAX(ses.last_packet_time_keepalive_recv, ses.last_packet_time_keepalive_sent),
&timeout);
update_timeout(opts.idle_timeout_secs, now, ses.last_packet_time_idle,
&timeout);
TRACE(("timeout %ld", timeout))
/* clamp negative timeouts to zero - event has already triggered */
return MAX(timeout, 0);
}
const char* get_user_shell() {