Re: [lwip-users] LLDP Implementation for lwIP

[Amit Ashara]

Hello Sergio,

I am using bare metal as well without OS and lwIP 1.4.1. So I don't see most of the functions being mentioned. Looks like I would need to bring 2.0.0.RC2 (quite some work). in my case I am using the drivers from TM4C. I checked and

  psNetif->output = etharp_output;

So what you are suggesting that I modify the etharp_output to process the LLDP transmit packet?

Regards

Amit

On Wed, Aug 3, 2016 at 3:18 PM, Sergio R. Caprile <address@hidden> wrote:

I sent my response before you answered to Simon, so I couldn't know your problem was in the output path without violating causality. I think some states penalize that... ;^)

When the stack needs to send a frame, it will call netif->output. That pointer is usually setup at the init function for the netif driver (see ethernetif_init()). My driver sets up etharp_output() for that, and I followed the guidelines in the wiki link I sent you, I suggest you follow that. I'm using bare metal, not an OS, and I don't remember if there is a constraint for this (it is for input stage).

Anyway, that will eventually call netif->linkoutput() which is what you probably want to use. Remember you are using bare Ethernet over your driver in your port; you are not (yet) using lwIP.

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