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. :)
when ttselect() is improved. This requires using an array of tty structs
and not using ttymalloc().
Fix an off by 1 error. Some caclulations seem to be off by a factor
of NCY. NCY defaults to 16, which gives 256 tty structs occupying
0xd000 bytes. The minor number encoding only allows 16 ttys.
Update the types of timeout functions to 2.0.
- Overflow now calculated right
- Close works ok,does not looses tty
- Better overflow handling now the snooping stops
on overflow,but programm notified and can reconnect if
it want to..Default maximal buffer set to 664 K and this
is probably too much..:)))
Utility still to come
Restore fixes to flushing that were lost in the previous commit.
Clean up snoop changes.
Add my TODO list from 1.1.5. The improvements in 1.1.5 should be "obtained"
first.
tape drive. I traced it to sys/scsi/scsi_base.c where some code were added
to print the return values of the sense command. My tape drive returned a
extended flags value of 0x20, so the key that is the lower 4 bits, is 0.
The code uses "key-1" to index into a table and then the kernel go to never-
never land.
Here is a fix for this. Will somebody please apply it?
Submitted by: John Hay
