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/* ISC license. */
#include <errno.h>
#include <skalibs/tai.h>
#include <skalibs/iopause.h>
#include <s6-dns/s6dns-engine.h>
#include <s6-dns/s6dns-resolve.h>
/*
This is basically a synchronous interface to s6dns_engine.
It resolves n dts at the same time.
*/
int s6dns_resolven_loop (s6dns_engine_t *dt, unsigned int n, unsigned int or, tain const *deadline, tain *stamp)
{
iopause_fd x[n] ;
unsigned int count = 0 ;
unsigned int got = 0 ;
while (got < n)
{
tain localdeadline = *deadline ;
int r ;
unsigned int i = 0 ;
unsigned int j = 0 ;
for (; i < n ; i++) if (dt[i].status == EAGAIN)
{
s6dns_engine_nextdeadline(dt + i, &localdeadline) ;
x[j].fd = dt[i].fd ;
x[j].events = (s6dns_engine_isreadable(dt + i) ? IOPAUSE_READ : 0) | (s6dns_engine_iswritable(dt + i) ? IOPAUSE_WRITE : 0) ;
j++ ;
}
if (!j) break ;
r = iopause_stamp(x, j, &localdeadline, stamp) ;
if (r < 0) return -1 ;
else if (!r)
{
if (tain_less(deadline, stamp)) return (errno = ETIMEDOUT, -1) ;
for (i = 0 ; i < n ; i++) if (dt[i].status == EAGAIN && s6dns_engine_timeout(dt + i, stamp))
{
got++ ;
if (or >= 2) return i ;
}
}
else
{
for (i = 0 ; i < n ; i++) if (dt[i].status == EAGAIN)
{
r = s6dns_engine_event(dt + i, stamp) ;
if (r)
{
got++ ;
if (r > 0) count++ ;
if (or && (r > 0 || or >= 2)) return i ;
}
}
}
}
return or ? (errno = ENOENT, -1) : count ;
}
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