[syslinux] IP details in COM32 module

[Coe, Colin C. (Unix Engineer)]

 > Coe, Colin C. (Unix Engineer) wrote:
> > Hi all
> > 
> > I'm trying to resolve a problem that's recently popped up 
> by turning 
> > on auxillary VLANs for our Linux workstations.  The problem 
> shows as 
> > DHCP failling for anaconda (but always succeeds for PXE).
> > 
> > I tried adding 'ipappend 1' to the pxelinux config files 
> but had no joy.
> > 
> > I'm thinking that if I write a COM32 module that adds "ip=1.2.3.4
> > gateway=1.2.3.1 netmask=255.255.255.0 dns= etc" to the end of the 
> > append line my problem may be solved.  Is there an API call of 
> > function to get this info?  I've seen the "resolve hostname" 
> > (AX=0010h) but it's what I'm looking for.
> > 
> 
> There are two ways to do it.
> 
> API 000Fh "get ipappend strings" will give you the ip= string 
> that ipappend would add.
> 
> API 0009h can be used to call the PXE stack and get the 
> entire DHCP packets.
> 
> In 3.50-pre* there are library wrappers for these -- they are 
> called syslinux_ipappend_strings (<syslinux/config.h>) and 
> pxe_get_cached_info
> (<syslinux/pxe.h>) repectively.
> 
> 	-hpa
> 

I know this is a newbie question, but how to I use pxe_get_cached_info?
I've search through the code and can't work out how to use it.  I'd like
to use Ferenc Wagner's macros but I also don't want to rewrite my code
when an offical macro system is introduced.

Could I get an example of how to use pxe_get_cached_info?

Thanks

CC

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