On Thu, 28 Oct 2004 09:39:43 +0100 Dave wrote: DS> Robert> Ok, lets see if I got this right. You have the main agent thread, DS> Robert> and two worker threads. The worker threads don't do any SNMP other DS> Robert> than to call send_v2trap. Is that right? DS> DS> Gary> Yep you got it. DS> DS> Urk! I'm not sure that's safe. DS> DS> As far as I remember, doesn't the 'send_trap_vars' mechanism use the DS> same (non-thread-safe) set of APIs as the incoming request handling? DS> I'd expect this to suffer from problems between generating traps DS> and receiving incoming requests. DS> DS> In order for that to work safely, wouldn't it be necessary to rework DS> the 'send_trap_vars' code to use the SSI approach instead? DS> DS> All of the locking that you talk about sounds to be aimed at a different DS> area of potential conflict. I'm not at all sure that you're protected DS> against races within the SNMP library itself.
Dave's right. If you were using the mutexes such that only one thread at a time was doing SNMP, you'd probably be ok. But if the main thread isn't blocked while the worker thread is doing it's trap thing, and you get an incoming request to the main thread, you've got two threads accessing the same data. The odds of getting a request while sending/processing traps may be low, but when it does happen, it could cause problems. -- 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-users> You are lost in a twisty maze of little standards, all different. ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click _______________________________________________ Net-snmp-users mailing list [EMAIL PROTECTED] Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
