[En-Nut-Discussion] Possibility to have different hex-files for appload on the same tftpd-server

[Robert Kurjata]

Krzysztof Drewicz napisał(a):
> Erik Lindstein napisał(a):
>> I would like to be able to connect diffferent units to the same server 
>> and get them to download correct software.
>>
>> Is it possible to have a tftpd-server sending different software to 
>> the bootloader depending on client MAC-adress.
>> Or is it possible to get appload to download an induvidual filename at 
>> bootloading?
> 
> Don't know what server software you are running but it's possible to 
> have different IPs for different macs via dhcp and in the most cases 
> it's DHCP boot-servers job to pass extra arguments as dhcp extra options.
> AFAIK there is no such tftp server for linux which could serve one 
> directory for one mac, like in PXE loader for PCs.
> If you are desperate you could setup a vlans based network, each 
> ethernut in separate vlan. Small/simple switches with vlans are very 
> cheep at the moment.
> And btw: tftp is defined on the "IP" layer, so it does not know even 
> what a MAC is. TFTP could work on a ppp connection, or be routed via the 
> Internet.
> 

As an alternate solution it I've seen in real life (some VOIP adapters 
are using it in the wild) device could ask tftp server using specially 
crafted path eg.

/MAC_ADDRESS/firmware

first, and later as a last resort ask for generic one

/firmware

It's a quite simple solution

> 
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