Re: [squid-users] Ip_wccp & Linux kernel 2.4.9-31

Thanks a whole bunch Joe!! I finally got Jorge's 2.4.18-ip_wccp patch
to compile and it is working now. However I do plan to move to GRE and
will use your patch.

I discovered nobody's ip_wccp or ip_gre patches or even the original
ip_gre.c will load without "unresolved symbol" if compiled in the RedHat
2.4.9-31 kernel source tree that is installed in /usr/src/linux-2.4.9-31
if you install the kernel-source-2.4.9-31.i386.rpm. Apparently Redhat
heavily patches the 2.4.9 kernel source before building the 2.4.9-31
kernel package.

So.... after beating my head for several hours over this, I installed
the kernel-2.4.9-31.src.rpm, ran rpm -bi, and then patched the source
tree in /usr/src/redhat/BUILD . This was the only way I could get any
modules to build that would load correctly. If anyone wants more
details of this ugly, messy business, contact me.

I apologize to everyone on the list for this long winded posting, but I
hope it may save someone else some grief when working with RedHat
2.4.9-31 kernels.

Tom

Joe Cooper wrote:

> I've posted a somewhat more recent 2.4.8 ip_gre patch (note that the
> usage of this module is slightly more complex--I don't have time to
> document it fully right now, but will soon).
>
> It's on my patches page here:
> http://www.swelltech.com/pengies/joe/patches/
>
> This patch applies cleanly to every kernel I've tried since then, I
> think (I know it applies to the Red Hat kernel packages of 2.4.9
> without problem).
>
> Short usage tips:
>
> modprobe ip_gre
> ifconfig gre0 192.168.1.1
> iptables -t nat -I PREROUTING -i gre0 -p tcp --dport 80 -j REDIRECT
> --to-port 3128
>
> I don't think anything else needs to be different from the usage of
> ip_wccp. ip_gre needs to have a routable address from /your/ router.
> It doesn't necessarily have to be a real internet routable address.
> Also be warned that Red Hat's initscripts will put gre0 in front of
> eth0 in the routing table if you have configured gre0 to have an IP on
> the same subnet. This will break connectivity completely to your
> local network. So be forewarned.
>
> Tom Hutchison wrote:
>
>> I recently went from Redhat kernel 2.4.9-13 to 2.4.9-31 in order to
>> fix a virtual memory problem Squid was experiencing. When I tried to
>> recompile ip_wccp.c under the kernel 2.4.9-31 source tree I got the
>> following error:
>>
>> gcc -D__KERNEL__ -I/usr/src/linux-2.4.9-31/include -Wall
>> -Wstrict-prototypes -Wno-trigraphs -O2 -fomit-frame-pointer
>> -fno-strict-aliasing -fno-common -Wno-unused -pipe
>> -mpreferred-stack-boundary=2 -march=i686 -DMODULE -DMODVERSIONS
>> -include /usr/src/linux-2.4.9-31/include/linux/modversions.h
>> -DEXPORT_SYMTAB -c ip_wccp.c
>> ip_wccp.c:77: warning: initialization from incompatible pointer type
>>
>>
>> When I load the compiled module It gives the following error:
>>
>> [ ipv4]# insmod ip_wccp
>> Using /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o
>> /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o: unresolved symbol
>> inet_del_protocol_Rsmp_b440f24c
>> /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o: unresolved symbol
>> inet_add_protocol_Rsmp_ad9b60be
>> /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o: unresolved symbol
>> __read_lock_failed
>> /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o: unresolved symbol
>> printk_Rsmp_1b7d4074
>> /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o: unresolved symbol
>> ip_rcv_Rsmp_e44b3b0d
>> /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o: unresolved symbol
>> __kfree_skb_Rsmp_4016cb34
>> /lib/modules/2.4.9-31/kernel/net/ipv4/ip_wccp.o: Hint: You are trying
>> to load a module without a GPL compatible license
>> and it has unresolved symbols. Contact the module supplier for
>> assistance, only they can help you.
>>
>> I have tried Joe's 2.2.18 patch and one from
>> aurora.dti2.net/parches/ip_wccp-2.4.2.patch
>>
>> Neither one will work. If anyone can provide any help I would sure
>> appreciate it. Unfortunately I am only a network engineer and have
>> no C programming skills. We have three Squid servers for our schools
>> and 2 of them are down now.
>>
>> Thanks,
>> Tom
>>
>
>
>

-- 
  "The only secure Microsoft software is what's still shrink-wrapped
in their warehouse..."
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Tom Hutchison	             voice: 541-966-3187
Network Analyst              fax:   541-966-3231
Umatilla-Morrow ESD          email: thutchis@helper.umesd.k12.or.us
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