Re: [lwip-users] Link Layer Discovery Protocol

[address@hidden]

Robert Deschambault wrote:
> I just read about this protocol and I was wondering what is involved 
> in implementing it using lwIP on an embedded target?

Implementing it is not really an lwIP thing: the protocol itself runs 
below what lwIP cares for, you just have to ensure you can safely send 
non-IP packets to your netif and that packets received for LLDP are 
passed to your protocol implementation, not to lwIP.

Another question is of course where you get the information to send and 
what to do with received information. Normally, you would integrate it 
into an SNMP tree, but this is not implemented in the lwIP agent (yet?).

Also, for devices with 2-port switch (as often required for industrial 
automation protocols), you need to send/receive on dedicated ports, 
which lwIP is not prepared for, so this is again a bit out of scope for 
lwIP.

Keeping that aside, if you have an open (i.e. non-GPL) implementation or 
plan to write one, please let us know ;-)


Simon