[syslinux] Infiniba(n)d and Firewire (1394)

[H. Peter Anvin]

H. Peter Anvin wrote:
> I'm currently looking at how to deal with the lack of usable MACs in
> Infiniba(n)d and Firewire.  Instead of presenting the MAC address when
> querying for the config file, these guys need either the Client
> Identifier, or the PC UUID.  The Client Identifier is a fairly opaque
> object which tends to include various fixed portions; the PC UUID is far
> to often not at all or incorrectly programmed.
> 
> I'm interested in how people who have DHCP setups with IB or 1394 handle
> this, and also how long the Client Identifier really is (in bytes).  My
> first plan was to simply expand it out in dash-separated hexadecimal the
> way I currently do with the mac, but such a filename could get *very*
> long which can cause a whole lot of trouble.
> 

One option that I've considered is to still hexify it, but do it without
dashes (except for the leading type byte), so an Infinibad example might
potentially look like:

pxelinux.cfg/20-ffa9d5fe460003c206a4fbe25fec4e9e15f96818711b2da5de9fca

I'm not sure if anyone could even recognize what that was, or if that's
really the form Infiniband nodes use for their client identifiers.

	-hpa