Re: [PATCH] CDP handler for linux

[Christoph Hellwig]

Hi Chis,

In article <[e-mail]> you wrote:
> 	I've been working on an addition to the kernel over the past
> couple of days that enables the kernel to interpret CDP (Cisco Discovery
> Protocol) packets which can be transmited by various pieces of Cisco kit.
>
> 	I've got it to the stage where it will read neighbors packets and
> display them via a /proc/net entry, but I've only really tested it with
> the router I have access to here, so I was wondering:

> --- linux-2.4/net/cdp/Makefile	Thu Jan  1 01:00:00 1970
> +++ linux-2.4.7-cdp/net/cdp/Makefile	Thu Aug  9 12:11:44 2001
> @@ -0,0 +1,25 @@
> +#
> +# Makefile for the Linux CDP layer.
> +#
> +# Note! Dependencies are done automagically by 'make dep', which also
> +# removes any old dependencies. DON'T put your own dependencies here
> +# unless it's something special (ie not a .c file).
> +#
> +# Note 2! The CFLAGS definition is now in the main makefile...
> +
> +# We only get in/to here if CONFIG_CDP = 'y' or 'm'
> +
> +O_TARGET := cdp.o
> +
> +export-objs = af_cdp.o

You don't export symbols, so you don't need to add your object to export-objs.

> +
> +obj-y	:= af_cdp.o
> +
> +ifeq ($(CONFIG_CDP),m)
> +  obj-m += $(O_TARGET)
> +endif
> +
> +include $(TOPDIR)/Rules.make
> +
> +tar:
> +		tar -cvf /dev/f1 .

Kill this tar rule, please :)

> diff -urN -X dontdiff linux-2.4/net/cdp/af_cdp.c linux-2.4.7-cdp/net/cdp/af_cdp.c
> --- linux-2.4/net/cdp/af_cdp.c	Thu Jan  1 01:00:00 1970
> +++ linux-2.4.7-cdp/net/cdp/af_cdp.c	Tue Aug 14 19:14:11 2001
> @@ -0,0 +1,509 @@
> +/*
> + *      Implements a CDP handler.
> + *
> + * 	This code is derived from protocol specifications by Cisco Systems
> + *	and various code culled from the Kernel source tree, mostly the IPX
> + *	code.
> + *
> + *	Unless otherwise commented, all revisions by Chris Crowther.
> + *
> + *	Revision 0.1.0:	Initial coding.
> + *	Revision 0.1.1:	Incoming CDP packet handling working, prefix's and addresses
> + *			need handling still.
> + *
> + *	Portions Copyright (c) 2001 Chris Crowther.

I think it's all yours, isn't it?

Besides this little nitpicks I'd like to give you the advise to send this
to linuxnetdev, too.

	Christoph

-- 
Whip me.  Beat me.  Make me maintain AIX.