On Tue, 24 Aug 2004 15:32:33 +0200 (CEST) Jochen wrote:
JF> Yes. There seem to be some more cases where Counter32 or Counter64 aren't
JF> handled correctly. This one has also been reported:
JF>
JF> snmpd returns Counter32 values with more than 32 bits on alpha.
Ack! Is there a bug report for this one?
I'm guessing this a 64 bit system, where a long is 64 bits?
I think we are going to continue to find lots of little gotchas on 64 bit
systems until someone has the time to take a good hard look at the code.
Unfortunately, this is not a problem that is specific to a particular file or
module, so it is a daunting task.
As part of that daunting task, I've argued for using types with explicit sizes
where appropriate, instead of the now ambiguous long, but the idea hasn't gone
over very well. So we have to hit the 64 bit gotchas one at a time, as they
come up.
This one, I'm guessing, is one of (probably lots and lots) the places in the
code where it is assumed that sizeof(long) == 4. The ASN library code should
probably have some checks added to make sure it doesn't pass accept integer
values that are larger than 32 bits.
I'm also assuming the example snmpwalk you gave above was run on the same box,
or another 64 bit box. What happens when the snmpwalk is run on a 32 bit
machine? I'd bet the library chokes on the value that is over 32 bits.
JF> One reference on how to fix these ones would help ;-)
Given that we can't use explicit sizes, the other solution, taken from the
interface code, seems to be something like this:
long actual, safe;
actual = get_some_value();
safe = actual & 0xffffffff;
return safe;
Hopefully the other core developers will thrown in their 2 cents/pence as well.
--
Robert Story; NET-SNMP Junkie <http://www.net-snmp.org/>
<irc://irc.freenode.net/#net-snmp>
Archive: <http://sourceforge.net/mailarchive/forum.php?forum=net-snmp-coders>
You are lost in a twisty maze of little standards, all different.
-------------------------------------------------------
SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
_______________________________________________
Net-snmp-coders mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/net-snmp-coders
