ASN_OCTET_STRING type is OK, but in order to see the string as ASCII with snmptrapd
you should have defined the MIB with the trap you are sending and the string itself.
In the example notification.c, the definition of the trap is included at
NET-SNMP-EXAMPLES-MIB:
netSnmpExampleNotification OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"This is a boring example that is used in the
agent/mibgroup/examples/notification.c to send out a
notification every 30 seconds. The actual notification means
nothing other than 30 seconds has elapsed since the last time
one was sent."
::= { netSnmpExampleNotifications 1 }
If you want to add a string to this trap you can do:
netSnmpExampleNotification OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS accessible-for-notify
OBJECTS { netSnmpExampleString } -- This is where we specify that a string is
included
STATUS current
DESCRIPTION
"This is a boring example that is used in the
agent/mibgroup/examples/notification.c to send out a
notification every 30 seconds. The actual notification means
nothing other than 30 seconds has elapsed since the last time
one was sent."
::= { netSnmpExampleNotifications 1 }
And you should also define the string (netSnmpExampleString):
netSnmpExampleString OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..10))
MAX-ACCESS accessible-for-notify
STATUS current
DESCRIPTION
"This is a simple object which is used to send a string into a trap.
This example object is not implemented anywhere."
::= { netSnmpExampleScalars 3 }
> -----Original Message-----
> Sent: Saturday, June 12, 2004 6:48 PM
> To: [EMAIL PROTECTED]
> Subject: A small problem in usage of method
> snmp_varlist_add_variable()
>
>
> Hi,
>
>
> My aim was to programatically send a trap with some string
> parameter value.
> (like a parameter with type 's' when using the snmptrap utility)
>
> I referred the example in notification.c and put some code that uses
> snmp_varlist_add_variable() to add more variables to the trap.
> But it appears that the 4th parameter of this function has to
> be one of the ASN
> types defined in asn1.h.
> If I use ASN_OCTET_STR as type to send my string text then in
> trap that is
> received and displayed by the snmptrapd the string is
> displayed in a Hex format.
>
> I want to display the string in the ASCII style (the way it
> is displayed when
> 's' is used as the parameter type for a trap sent using snmptrap )
>
> Is there a corresponding type I can use as the 4th param in the method
> snmp_varlist_add_variable()?
> Or is there some other method/way for that?
>
> Thanks & regards,
> Viren
>
>
>
>
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