More async resolver refinements:

- yp_main.c: Always add the resolver socket to the set of fds
  monitored by select(). It can happen that pending == 0 but we
  still have some data in the socket buffer from an old query.
  This way, the data will be flushed in a timely manner.

- yp_extern.h: remove proto for yp_dns_pending() since we don't need
  it anynmore.

- yp_server.c: call yp_async_lookup_name()/yp_async_lookup_addr()
  functions with the svc_req pointer as an arg instead of the xprt.
  (The svc_req struct includes a pointer to the transport handle,
  and it also has the service version number which the async DNS
  code will need. (see below))

- yp_dnslookup.c:

   o Nuke yp_dns_pending() since we don't need it anymore.
   o In yp_run_dnsq(), swallow up and ignore replies if no requests
     are pending or the ID doesn't match any of the IDs in the queue.
   o In yp_send_dns_reply(), we assume that we will always be
     replying to an NIS v2 client. While this will probably always
     be the case, we do support the v1 'match' procedure, and it
     has a different result struct than v2. For completeness,
     support replying to both NIS v1 and v2 clients.
   o Update the queue entry structure to include a member to
     keep track of the NIS version number.
   o Have yp_async_lookup_name/addr() extract the version number
     from the svc_req structure and save it with the queue entry
     for yp_send_dns_reply() to inspect later.
   o Add some comments.

1 files changed, 3 insertions, 4 deletions

diff --git a/usr.sbin/ypserv/yp_extern.h b/usr.sbin/ypserv/yp_extern.h
index fc3e6dd..0fb7ab2 100644
--- a/usr.sbin/ypserv/yp_extern.h
+++ b/usr.sbin/ypserv/yp_extern.h
@@ -29,7 +29,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: yp_extern.h,v 1.3 1996/12/22 15:53:55 wpaul Exp $
+ *	$Id: yp_extern.h,v 1.4 1996/12/24 07:52:52 wpaul Exp $
  */
 #include <stdio.h>
 #include <string.h>
@@ -106,8 +106,7 @@ extern unsigned long	svcudp_get_xid __P(( SVCXPRT * ));
 #endif
 
 extern int	yp_init_resolver __P(( void ));
-extern int	yp_dnsq_pending __P(( void ));
 extern void	yp_run_dnsq __P(( void ));
 extern void	yp_prune_dnsq __P(( void ));
-extern ypstat	yp_async_lookup_name __P(( SVCXPRT *, char * ));
-extern ypstat	yp_async_lookup_addr __P(( SVCXPRT *, char * ));
+extern ypstat	yp_async_lookup_name __P(( struct svc_req *, char * ));
+extern ypstat	yp_async_lookup_addr __P(( struct svc_req *, char * ));