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From: | Amit Ashara |
Subject: | Re: [lwip-users] LLDP Implementation for lwIP |
Date: | Wed, 3 Aug 2016 15:43:22 -0500 |
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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