[Click] Socket delayed read

[Christine Jones]

I am running the head of the main Click git repository as of 9-22-2011. That is right before Click 2.0.1 was released.

So, it has been awhile since I have updated. Have the bug fixes occurred more recently?

Thanks!

Christine

On Jul 19, 2012, at 6:54 AM, Beyers Cronje wrote:

> Hi,
> 
> What version of Click are you running? There has been some bug fixes to
> Socket a while back that addressed some notifier and scheduling bugs.
> 
> Beyers
> 
> On Thu, Jul 19, 2012 at 3:25 PM, Christine Jones <cej at bbn.com> wrote:
> 
>> Hello!
>> 
>> I am using Click to set up a router that installs a proxy service for a
>> subset of traffic. Much of the traffic flowing through the router is
>> forwarded as normal. But some traffic that meets certain criteria is sent
>> to the proxy (a user-space process on the local machine). The proxy also
>> sends packets and other state back to the Click router.
>> 
>> There are two versions of this router, kernel and user-level. I am
>> encountering a problem with the user-level version. The communication
>> between router and proxy is via the Socket element configured to be a unix
>> socket, as such...
>> 
>> proxy :: Socket(UNIX, 'pathname', CLIENT true)
>> 
>> FromDevice
>>        ...
>>        -> proxy;
>> 
>> proxy
>>        ...
>>        -> Queue
>>        -> RawSocket(TCP);
>> 
>> The problem is that when the router has a period in which no packets are
>> forwarded to the proxy the socket may not be read (although the socket is
>> configured for reading in the select loop and there is data waiting from
>> the proxy). If I force the router to write to that socket (with a periodic
>> keep-alive) then the socket will be read. However, I would prefer to not
>> have to rely on keep-alives. The socket should be selected when there is
>> data to read.
>> 
>> Any thoughts?
>> 
>> Thanks!
>> 
>> Christine
>> _______________________________________________
>> click mailing list
>> click at amsterdam.lcs.mit.edu
>> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>> 
> _______________________________________________
> click mailing list
> click at amsterdam.lcs.mit.edu
> https://amsterdam.lcs.mit.edu/mailman/listinfo/click