Re: ip_wccp.c for WCCP v2 question

Dear All,

 Can anybody send me the last information about the WCCP v2 implementation
 in squid and information about its state, bugs, etc.

 I sent an email before but I did not receive any answer.

 I look forward to hearing from you.

Best Regards,
Vahid Fereydounkolahi
fereydunk@yahoo.com

On Sat, 17 Mar 2001, Joe Cooper wrote:

> Ok...Way over /my/ head, as I'm only the messenger trying to help Kevin
> debug the problems he's run into. But I'll do some studying. I've just
> built a new kernel RPM with the patch that includes the module closing
> code that Henrik spotted as MIA. Will see if that fixes our oops
> problems. I'm awaiting Kevin getting back to the site where the cache
> is (it's a remote site...so an oops is painful!). We'll probably get
> the new kernel running tomorrow.
>
> Since we're still using 2.2 series kernels I'm not yet looking into
> netfilter, but I will do that soon, as WCCP v2 support is too good to
> let fall by the wayside. Have any/all of the other tunneling modules
> been updated to work with netfilter so I can learn from them?
>
> Big thanks to Roger and Henrik, for the excellent pointers. I'll wrap
> my head around these things as quickly as possible. And I'll probably
> create a CVS branch for WCCP once we've got things running at Kevin's
> site.
>
> As I mentioned, v1/v2 in the same Squid needs some fixing--I'm going to
> have to study the protocol some more, and the wccp.c code to see if they
> can both fit in the same file and configuration option, or if they ought
> to be separated out into a wccp2_router option and wccp2.c file
> (thoughts, anyone? v2 allows multiple routers and the cache can tell
> the routers more information about itself--so more configuration options
> are needed for complete v2 support).
>
> Henrik Nordstrom wrote:
>
> > Roger Venning wrote:
> >
> >> Looking at net/ipv4/ipip.c as a guide, what Joe has done looks
> >> reasonable. Can you send
> >> me a dump of an oops (using the ksymoops tool) Joe?
> >
> >
> > I got myself a copy of the kernel sources (only had the headers), and
> > the "old" way indeed seems to be the correct one, used both by ipip and
> > ip_gre.
> >
> > I am still a bit questioning about the validity of the mac magic (don't
> > think many things expects the mac layer to be IP...) but it is shared
> > with these modules as well.
> >
> > The packet size concerns still is there, and the same concerns apply to
> > ipip and ip_gre. Both are quite sloppy with packet size checks.
> >
> > One thing which is missing from ip_wccp is 2.4 netfilter integration.
> > See ip_gre.c. Should not be a big problem, but might cause some
> > confusion if used together with netfilter conntrack...
> >
> > A further "cosmetic" thing is to send ICMP PROTOCOL UNREACHABLE on
> > non-WCCP packets..
> >
> > /Henrik
>
> --
> Joe Cooper <joe@swelltech.com>
> Affordable Web Caching Proxy Appliances
> http://www.swelltech.com
>
Received on Sat Apr 14 2001 - 04:47:02 MDT