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Re: mapping ICMP codes to Unix errno code numbers

On 3/04/2013, at 5:36 AM, Erik Fair <> wrote:

> On Mar 31, 2013, at 22:48, Darren Reed <> wrote:
>> How do you know that the administratively prohibited ICMP error
>> will 100% of the time come from a remote network?
>> Afterall, it could also be generated by your local firewall or perhaps
>> even the host itself!
> And the difference between those cases to the application is … ?

Documentation. If the error code is well documented then the application author 
is less likely to do the wrong thing with it. 


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