[tpm] how to detect ICMP 'port unreachable'?

Kartik Thakore thakore.kartik at gmail.com
Tue Mar 16 05:28:57 PDT 2010

Hi Fulko,

Have you tried NetPacket::ICMP? I have used this module before to  
decode ICMP packets and get data based on their ICMP code.  
ICMP_UNREACH is the code you want.

Kartik Thakore

On 2010-03-16, at 12:47 AM, Fulko Hew <fulko.hew at gmail.com> wrote:

> On Mon, Mar 15, 2010 at 11:24 PM, <hanker at ifdsgroup.com> wrote:
> AfaIk,
> No err checking is avail on that level. I suggest go one or two  
> levels up in osi and negotiate protocol (I assume you have picked  
> one already?), eg: hello, wait for hello in  return, sending xxx  
> bytes, wait for go ahead in return... So on
> Nope... can't... Its SNMP and I'm querying a remote address.
> The address exists, but there is no SNMP daemon on the std port.
> so I query, and the remote end returns 'no port'.  Since the ICMP  
> isn't returned
> upstream, SNMP assumes a 'no response', times out, and retries.
> ... All this time wasted retrying when the system already told us
> there was no one there!
> There has to be a better way!
> Fulko
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