Re: [squid-users] External C program

> On Thu, Apr 30, 2009 at 4:40 AM, Amos Jeffries <squid3_at_treenet.co.nz>
> wrote:
>> 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.
>>
>
> Yep I found it out :)
>
>> And please do use snscanf instead of scanf. It will save you from many
>> security and segfault bugs over your coding time.
>>
>
> You are talking about snscanf, but nor "man snscanf" nor google are
> showing me revelant stuff about this function ... Am I missing
> something ? I am using sscanf instead, for now ...
>

It's not common. Some compilers don't have it.
Exactly the same semantics as sscanf, but lets you limit the length of
buffer scanned so no need to nul-terminate the buffer.

>>>
>>> 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.
>>
>
> I am using the public IP address to access my proxy. I'll try to
> remove the 127.0.0.1 from the hosts file and see how things go on ...
>
>
>>
>> Amos
>> --
>> Please be using
>>  Current Stable Squid 2.7.STABLE6 or 3.0.STABLE14
>>  Current Beta Squid 3.1.0.7
>>
>
> Thank you everyone again for your time, and sorry for the delay in
> getting back to you, I've been doing some researches and making my
> hands dirty with my external helpers all week long!
>
> Julien
>
Received on Sat May 02 2009 - 05:55:28 MDT