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[lwip-devel] [bug #21655] DHCP doesn't work reliably with multiple netif

From: Jonathan Larmour
Subject: [lwip-devel] [bug #21655] DHCP doesn't work reliably with multiple netifs
Date: Fri, 30 Nov 2007 15:30:59 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20070530 Fedora/ Firefox/

Follow-up Comment #9, bug #21655 (project lwip):

I'm not sure, but what it might be is to allow multiple netifs on the same
underlying hardware interface, i.e. IP aliases. The hardware interface doesn't
know about matching IPs, so it would have to just pick one netif to pass it up
with. But ip_input would need to sort it out and get a proper match on the

In that case, I think the best thing to do might be to check whether the
'inp' netif does match (in terms of IP address, mask, broadcast addr, etc.)
and only resort to scanning the netif list if it doesn't. This will make
things faster for the common case too!


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