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Re: Need help to build my own external help

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Problem solved partially by moving the executable to /var/lib/squid. I
no longer get the errors in cache.log.

however the browser and squidclient are unable to get a page from
internet, they are trying to infinity and there is no error reported.

2012/4/12 Mohamed Amine Kadimi <amine.kadimi@xxxxxxxxx>:
> 2012/4/11 Amos Jeffries <squid3@xxxxxxxxxxxxx>:
>> On 12.04.2012 06:12, Mohamed Amine Kadimi wrote:
>>>
>>> 2012/4/10 Amos Jeffries <squid3@xxxxxxxxxxxxx>:
>>>>
>>>> On 11.04.2012 03:27, Mohamed Amine Kadimi wrote:
>>>>>
>>>>>
>>>>> Hello,
>>>>>
>>>>> I'm trying to make an external helper which will be called by an acl,
>>>>> so I have created one which is very simple: it takes an IP in stdin
>>>>> and returns OK if it maches a predefined IP.
>>>>>
>>>>> It works when I test it from the CLI, however when I put the relevant
>>>>> directives in the squid.conf file and restart squid the connection to
>>>>> internet is no longer possible.
>>>>>
>>>>> The message displayed by FF is : "Firefox is configured to use a proxy
>>>>> server that is refusing connections".
>>>>
>>>>
>>>>
>>>> It would seem Squid is not listening on the IP:port which Firefox is
>>>> trying
>>>> to use, or a firewall is actively rejecting port 3128 TCP connections.
>>>>
>>>> 1) check that squid is running okay. It should be fine if your helper
>>>> runs
>>>> okay on command line, but read+execute access permission differences
>>>> between
>>>> the squids user and your own user account can still cause problems. Run
>>>> "squid -k parse" or look in cache.log for message if Squid is not
>>>> starting.
>>>>
>>>> 2) check that port 3128 is accessible. telnet etc can be used here. A
>>>> packet
>>>> dump may be needed to find which device is rejecting TCP packets to port
>>>> 3128.
>>>>
>>>
>>> It's not a connectivity issue since Squid is working fine unless I
>>> uncomment the lines relevant to my external helper.
>>>
>>> I noticed some errors I didn't understand in the cache.log:
>>>
>>> #######
>>> 2012/04/11 17:56:19| Accepting  HTTP connections at [::]:3128, FD 24.
>>> 2012/04/11 17:56:19| HTCP Disabled.
>>> 2012/04/11 17:56:19| Squid modules loaded: 0
>>> 2012/04/11 17:56:19| Adaptation support is off.
>>> 2012/04/11 17:56:19| Ready to serve requests.
>>> 2012/04/11 17:56:19| WARNING: src_ip_ext #1 (FD 10) exited
>>> 2012/04/11 17:56:19| WARNING: src_ip_ext #4 (FD 16) exited
>>> 2012/04/11 17:56:19| WARNING: src_ip_ext #2 (FD 12) exited
>>> 2012/04/11 17:56:19| WARNING: src_ip_ext #3 (FD 14) exited
>>
>>
>> These causing ....
>>
>>
>>> 2012/04/11 17:56:19| Too few src_ip_ext processes are running
>>> 2012/04/11 17:56:19| storeDirWriteCleanLogs: Starting...
>>> 2012/04/11 17:56:19|   Finished.  Wrote 0 entries.
>>> 2012/04/11 17:56:19|   Took 0.00 seconds (  0.00 entries/sec).
>>> FATAL: The src_ip_ext helpers are crashing too rapidly, need help!
>>
>>
>> ... this ...
>>
>>
>>>
>>> Squid Cache (Version 3.1.6): Terminated abnormally.
>>
>>
>> ... resulting in the proxy being shutdown. ie (1).
>>
>>
>>> #######
>>>
>>> I think I'll need to review my program.
>>
>>
>> Hmm. The only thing that looks like it might cause issues is fopen() for the
>> debug log.
>>
>
> I've rewritten the source code excluding fopen() and handling
> concurrency but I still get the same problem.
>
> Here's the new one:
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
>
> #define MAX_INPUT 8192
>
> int main(int argc, char **argv)
> {
>    char request [MAX_INPUT];
>
>    while (fgets(request, MAX_INPUT , stdin) != NULL)
>    {
>        const char *channel_id = strtok(request, " ");
>        char *detail = strtok(NULL, "\n");
>
>        if (detail == NULL)
>        {
> // Only 1 paramater supplied. We are expecting at least 2 (including
> the channel ID)
>            fprintf(stderr, "FATAL: %s is concurrent and requires the
> concurrency option to be specified.\n", program_name);
>            exit(1);
>        }
>
>        if (strcmp(detail,"172.30.30.1")==0) printf ("%s OK\n",channel_id);
>        else printf ("%s ERR\n",channel_id);
>    }
>    return 0;
> }



-- 
Mohamed Amine Kadimi

Tél     : +212 (0) 675 72 36 45



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