Re: [squid-users] External C program

Julien Philibin wrote:
> On Wed, Apr 29, 2009 at 11:15 PM, Amos Jeffries <squid3_at_treenet.co.nz> wrote:
>>> Very interesting Bharath !!!
>>>
>> Yes thank you. You have identified the issue and we can now tell Julien
>> exactly what he has to do.
>>
>>> What would be your advice to get my program working ?!
>>>
>> Use fgets(). The scan() family apparently do not handle EOF in the way
>> needed.
>>
>> Thus to work your code must be:
>>
>> char line[8196];
>> char ip[45];
>> char url[8196];
>>
>> ip[0] = '\0';
>> url[0] = '\0';
>>
>> while( fgets(line, 8196, stdin) != NULL ) {
>> snscanf(sbuf, 8196, "%s %s" ip, url);
>> // happy joy ....
>> }
>>
>> Amos
>>
>
> Hey that's smart! :)
>
> I'm going to go for that and if things go wrong, I'll let you know ...

It is slightly wrong. The sbuf there should be 'line'.
I hope your compiler catches that also.

And please do use snscanf instead of scanf. It will save you from many
security and segfault bugs over your coding time.

>
> Thank you everyone!
>
> btw: Amos, any idea why I get a randomly 127.0.0.1 instead of my real
> Ip in the logs ?
>

As someone said earlier 127.0.0.1 is one of the IPs assigned to your
machine. It is a special IPv4 address assigned as "localhost". Every
machine with networking has that same IP for private non-Internet
traffic use.

Most machines will have two of these; 127.0.0.1 for IPv4 and ::1 for
IPv6. They are identical in use and purpose for their own IP protocols.

Why you get it randomly I don't know. I expect it to show up
consistently for requests the OS identifies as local-machine only. And
never for requests the OS thinks are remote global.

If your testing uses localhost:3128 as the proxy it will connect to
127.0.0.1 privately. If it uses the public IP or name resolving to the
public IP it will use a global public connections.

Amos

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