snmpset - Octet string

[surya ravi kiran k]

Hi,

Sorry if this topic was discussed else where, couldnt find a proper previous thread.

Using the snmp api, how can octet strings be SET?. i have an object
(forwarding mac address) whose value is of the type ASN_OCTET_STRING.
when a call to snmp_add_var is made should the call look something like
snmp_add_var(pdu, obj, objlen, 's', buf)
where buf is an unsigned char string?


when using snmpset tool for this object, the command
snmpset <host> -c <string> <objid> 00aabbccddee fails..
where the mac address is 00:aa:bb:cc:dd:ee

any suggestions..

thanks
ksr



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[Niels Baggesen]

Post by surya ravi kiran k
Using the snmp api, how can octet strings be SET?. i have an object
(forwarding mac address) whose value is of the type ASN_OCTET_STRING.
when a call to snmp_add_var is made should the call look something like
snmp_add_var(pdu, obj, objlen, 's', buf)
where buf is an unsigned char string?
when using snmpset tool for this object, the command
snmpset <host> -c <string> <objid> 00aabbccddee fails..
where the mac address is 00:aa:bb:cc:dd:ee

The 's' is for a printable string. For your mac address example you
should use 'x', as in
snmpset <host> -c <string> <objid> x 00aabbccddee

/Niels

[Niels Baggesen]

Post by Niels Baggesen
snmpset <host> -c <string> <objid> x 00aabbccddee

Oops, that what I get for cut-and-paste'int too much. You must have -c
string befor host, as in

snmpset -c <string> <host> <objid> x 00aabbccddee

/Niels

[Niels Baggesen]

[ First - *please* don't mail me directly. I don't have
the time or inclination to offer private, unpaid, SNMP
consultancy. Keep discussions to the list, where others
can both learn and offer advice. Thanks. ]

x: Bad object type..

No, it does not, unless you mistyped the command. Exact command and
error message, please!

unsigned char mac[]={00, aa, bb, cc, dd, ee};
using the snmp api, snmp_add_var(pdu, obj, len, 'x', mac) and send the pdu results in a value of all zeros being set.. has it got to handle or do something with the leading value of 00 which is interpreted as a NULL value?

If you use the snmp_add_var function, you must pass the value in the
form as on the snmpset command:

char mac[] = "00aabbccddee";

If you have the binary format you must use the snmp_pdu_add_variable
function.

/Niels