Re: [lwip-users] Getting Raw ARP Packets

[Joel Cunningham]

> On May 22, 2018, at 06:13, David M. Zar <address@hidden> wrote:
> 
> As a side note, we have a software version of our proposed system running on 
> a PC... it opens a BSD RAW_SOCKET and does everything at that level. 
> Essentially, that's what I'm trying to emulate, here, but being as efficient 
> as possible in an embedded environment. I do have an Ethernet driver working 
> very well, it seems, so maybe I'm 90% there.)

From the use case you’ve described, I’m guessing you’re using an AF_PACKET 
socket on your PC, which allows sending/receiving raw Ethernet packets instead 
of IP packets you get with AF_INET/SOCK_RAW

LwIP supports SOCK_RAW, but not AF_PACKET sockets. There have been some 
requests on the mailing lists for AF_PACKET support, but no implementation yet.

Joel