HardenedBSD/usr.sbin/ypbind
Bill Paul 5d645648b1 ypbind jumbo patch :)
The existing ypbind exhibits some truly anti-social behavior. After
initially establishing a binding with an NIS server, the following events
take place:

- ypbind waits for 60 seconds before trying to broadcast a ping again
- after the 60 seconds expires, ypbind sends out broadcasts every 5 seconds
  come hell or high water.

These broadcasts travel far and wide, even to NIS servers in other domains
which dutifully log the packets even though they don't respond to them.
This leads to lots of unnecessary traffic and bloated log files.

This behavior has been fixed/changed. Here's what happens now:

- We still broadcast every 5 seconds at startup, just like before.

- Once bound, we send out packets once every 60 seconds to the server
  we're bound to AND NO ONE ELSE.

- If we fail to receive a reply from our server within FAIL_THRESHOLD
  seconds, we assume our server has croaked and go back to broadcasting
  everywhere every 5 seconds again until somebody answers. FAIL_THRESHOLD
  is currently set to 20 seconds.

Other fixes/improvements:

- ypbind now logs 'server not responding' and 'server OK' messages where
  appropriate.

Thanks to Thomas Graichen <graichen@omega.physik.fu-berlin.de> for
reporting the problem and guilt-tripping me into fixing it. :)
1995-02-16 01:21:44 +00:00
..
Makefile Copying YP programs over from 1.1.5, with a slightly different directory 1994-08-08 01:03:58 +00:00
ypbind.c ypbind jumbo patch :) 1995-02-16 01:21:44 +00:00