The same stuff with commented out
// fcntl(nfqfd,F_SETFL,O_NONBLOCK);
The same stuff. Or do i miss something, and there is a flag, which
forces blocking operation?
Any suggestion?
if (nfqfd>0) {
// fcntl(nfqfd,F_SETFL,O_NONBLOCK);
} else throw "fail to set nfq nfnl fd";
}
2009/2/16 Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>:
> Anton VG wrote:
>>
>> Pablo,
>> Attached is the code which triggers the case, and it does not use
>> threads (btw we of coase use mutexes in threaded app)
>>
>> How to use it:
>> at first, the app created 40 queues and attaches to output. Every
>> first 40 created queues have assigned corrwsponding
>> 192.168.1.{queue_num} IP address assigned to the queue.
>> This means, for instance when you send a file to an IP address
>> 192.168.1.37 it flows through QUEUE 37.
>>
>> Than app started the loop, where it's randomly creates and destroys
>> extra queues (over 40) every second.
>>
>> After starting the app, you need to send a big file, say 1GB, over FTP
>> to anther PC with IP address from group of first 40, we used
>> 192.168.1.37
>>
>> Somewhere is the middle of sending the file it triggers the error on
>> queue creation.
>>
>> Please make sure that you use OUTPUT chain, and you send a file from test
>> PC.
>> With this test code we did trigger this both on 64 and 32 bit systems.
>> Kernel versions on test PC's 2.6.26.1 and 2.6.26.5
>>
>> Just let me know if anything needs clarification.
>
> void init_nfq()
> ...
> if (nfqfd>0) {
> fcntl(nfqfd,F_SETFL,O_NONBLOCK);
> } else throw "fail to set nfq nfnl fd";
> }
>
> With the current interface of libnetfilter_queue, the queue creation must be
> blocking to ensure serialization. I'll document this. I can add some
> functions to allow non-blocking queue creation but that's a different point.
>
> --
> "Los honestos son inadaptados sociales" -- Les Luthiers
>
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