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Make fast-retry more configurable and do exponential backoff.

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This commit is contained in:
Simon Kelley
2022-09-14 16:16:08 +01:00
parent 8f2d432799
commit 9a9f6e147c
5 changed files with 40 additions and 18 deletions
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15
src/forward.c
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@@ -608,7 +608,7 @@ int fast_retry(time_t now)
u32 millis = dnsmasq_milliseconds();
for (f = daemon->frec_list; f; f = f->next)
if (f->sentto && f->stash && difftime(now, f->time) < TIMEOUT)
if (f->sentto && f->stash && difftime(now, f->time) < daemon->fast_retry_timeout)
{
#ifdef HAVE_DNSSEC
if (f->blocking_query)
@@ -617,8 +617,8 @@ int fast_retry(time_t now)
/* t is milliseconds since last query sent. */
int to_run, t = (int)(millis - f->forward_timestamp);
if (t < daemon->fast_retry_time)
to_run = daemon->fast_retry_time - t;
if (t < f->forward_delay)
to_run = f->forward_delay - t;
else
{
unsigned char *udpsz;
@@ -639,7 +639,7 @@ int fast_retry(time_t now)
forward_query(-1, NULL, NULL, 0, header, f->stash_len, ((char *) header) + udp_size, now, f,
f->flags & FREC_AD_QUESTION, f->flags & FREC_DO_QUESTION);
to_run = daemon->fast_retry_time;
to_run = f->forward_delay = 2 * f->forward_delay;
}
if (ret == -1 || ret > to_run)
@@ -2822,8 +2822,11 @@ static struct frec *get_new_frec(time_t now, struct server *master, int force)
}
if (target)
target->time = now;
{
target->time = now;
target->forward_delay = daemon->fast_retry_time;
}
return target;
}