Truncation of trap by snmptrapd with DisplayString ending in null

Hell Everyone,
    I'm not sure whether this is a problem with snmptrapd or with the agent/mib declaration of the vendor.  I am receiving a trap with the defined in the following MIB excerpt:

[Removed for clarity]

    sessionAuthenticationTrap  NOTIFICATION-TYPE
        OBJECTS {
        sessionAccessType,
        sessionUserName,
        sessionUserIpAddress,
        sessionAuthFailure
    }
    STATUS  current
        DESCRIPTION
        "Authentication Failure Trap is sent each time a user
        authentication is refused."

[Removed for clarity]

    sessionUserName  OBJECT-TYPE
        SYNTAX  DisplayString (SIZE (0..31))
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
        "The user name of the user logged-in."

[Removed for clarity]

The sessionUserName is transmitted to the trap station as a HEX STRING with a null character as the final character.  Nothing after this string is logged or sent to a trap handler as the log excerpt shows below:

2007-09-16 14:37:32,UDP: [10.0.0.1]:161,10.0.0.1,0,sysUpTimeInstance = Timeticks: (647224900) 74 days, 21:50:49.00    snmpTrapOID.0 = OID: sessionAuthenticationTrap    sessionAccessType = INTEGER: ssh(5)    sessionUserName = STRING: TestByMe

I have attempted to simulate this using snmptrap to formulate my own trap and send it.  Using both a regular string and a HEX string without a trailing null, it works fine.  When the null is added, I get the same results as you see above.  I cannot find any evidence that this should be the way it operates (references to valid characters in DisplayString in RFC 845 only state that null is no operation), but I am definitely not sure.  Any help would be appreciated.  Thanks.




_________________________________________________________________
Capture your memories in an online journal!
http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/

_______________________________________________
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