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R: [lwip-users] Returning ERR_MEM from low_level_output()?


From: Ceresoli Luca
Subject: R: [lwip-users] Returning ERR_MEM from low_level_output()?
Date: Fri, 18 Apr 2008 11:47:58 +0200

Simon wrote:
> netif->linkoutput is called e.g. from udp_output (which calls
> ip_output_*, which calls netif->output/etharp_output which calls 
> netif->linkoutput)

Thanks Simon.

So, at least in UDP raw mode, the return value of low_level_output() climbs up 
to the original call (e.g. udp_send()).
(forward-tracking was much easier than backtracking!)

And the @note actually means: "Try your best to enqueue the packet. If you 
_really_ can't, return ERR_MEM."...
Correct?

Luca




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