Re: [Devmon] HEX-STRING bug

[Buchan M. <bg...@st...>]

On Thursday 06 November 2008 16:10:22 Guðmundur Örn Ingvarsson wrote:
> The problem is I don't want to convert or unpack the string. I just want
> the string but devmon won't let me have it.

It's not really a string (on the wire). snmpwalk is converting it to a string 
for you for display (similar to the way a hex viewer does ...).

Take a look at the compaq-server/log test.

For example:

SNMPv2-SMI::enterprises.232.6.2.11.3.1.6.0 = Hex-STRING: 07 D8 04 1E 00 1C

$ grep 232.6.2.11.3.1.6 /usr/share/devmon/templates/compaq-server/log/oids
cpqHeEventLogInitialTime: 1.3.6.1.4.1.232.6.2.11.3.1.6 :        branch

$ grep ^cpqHeEventLogInitial /usr/share/devmon/templates/compaq-
server/log/transforms
cpqHeEventLogInitialTimeTxt:    UNPACK  : {cpqHeEventLogInitialTime} H12
cpqHeEventLogInitialYHex:       SUBSTR  : {cpqHeEventLogInitialTimeTxt} 0 4
cpqHeEventLogInitialMHex:       SUBSTR  : {cpqHeEventLogInitialTimeTxt} 4 2
cpqHeEventLogInitialDHex:       SUBSTR  : {cpqHeEventLogInitialTimeTxt} 6 2
cpqHeEventLogInitialHHex:       SUBSTR  : {cpqHeEventLogInitialTimeTxt} 8 2
cpqHeEventLogInitialmHex:       SUBSTR  : {cpqHeEventLogInitialTimeTxt} 10 2
cpqHeEventLogInitialY:          CONVERT : {cpqHeEventLogInitialYHex} hex
cpqHeEventLogInitialM:          CONVERT : {cpqHeEventLogInitialMHex} hex
cpqHeEventLogInitialD:          CONVERT : {cpqHeEventLogInitialDHex} hex
cpqHeEventLogInitialH:          CONVERT : {cpqHeEventLogInitialHHex} hex
cpqHeEventLogInitialm:          CONVERT : {cpqHeEventLogInitialmHex} hex


In your case, since you don't want to convert the Hex values, an unpack should 
be sufficient:

> .1.3.6.1.4.1.1588.2.1.1.1.7.2.1.13.1 = Hex-STRING: 20 00 00 05 1E 35 63 DF

So, try: 

bar: UNPACK : {foo} H16

Then bar should contain the string 200000051E3563DF

Regards,
Buchan