/* void dns_readable(int fd, void *ptr)
* Input: An fd which has become readable, ptr not used.
* Output: None.
* Side effects: Read DNS responses from DNS servers.
* Note: Called by the fd system.
*/
void
dns_readable(int fd, void *ptr)
{
adns_processreadable(dns_state, fd, &SystemTime);
dns_do_callbacks();
dns_select();
}
int
engine_read_message (time_t delay)
{
fd_set read_set, write_set;
struct timeval wt;
int nfds, length, i;
unsigned int fdflags;
int fdtype;
void *fdvalue;
aClient *client_p;
engine_get_fdsets (&read_set, &write_set);
wt.tv_sec = delay;
wt.tv_usec = 0;
nfds = select (MAXCONNECTIONS, &read_set, &write_set, NULL, &wt);
if (nfds == -1)
{
if (((errno == EINTR) || (errno == EAGAIN)))
return -1;
report_error ("select %s:%s", &me);
sleep (5);
return -1;
}
else if (nfds == 0)
return 0;
if (delay)
NOW = timeofday = time (NULL);
for (i = 0; i < MAXCONNECTIONS; i++)
{
get_fd_info (i, &fdtype, &fdflags, &fdvalue);
client_p = NULL;
length = -1;
if (nfds)
{
int rr = FD_ISSET (i, &read_set);
int rw = FD_ISSET (i, &write_set);
if (rr || rw)
nfds--;
else
continue;
fdfprintf (stderr, "fd %d: %s%s\n", i, rr ? "read " : "",
rw ? "write" : "");
switch (fdtype)
{
case FDT_NONE:
break;
case FDT_AUTH:
client_p = (aClient *) fdvalue;
if (rr)
read_authports (client_p);
if (rw && client_p->authfd >= 0)
send_authports (client_p);
check_client_fd (client_p);
break;
case FDT_LISTENER:
client_p = (aClient *) fdvalue;
if (rr)
accept_connection (client_p);
break;
case FDT_RESOLVER:
#ifdef USE_ADNS
dns_do_callbacks ();
#else
do_dns_async ();
#endif
break;
case FDT_CLIENT:
client_p = (aClient *) fdvalue;
readwrite_client (client_p, rr, rw);
break;
default:
abort (); /* unknown client type? bail! */
}
}
else
break; /* no more fds? break out of the loop */
} /* end of for() loop for testing selected sockets */
return 0;
}
