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[lwip-users] Re: [lwip] arp_query() and network drivers design
From: |
Adam Dunkels |
Subject: |
[lwip-users] Re: [lwip] arp_query() and network drivers design |
Date: |
Thu, 09 Jan 2003 01:32:21 -0000 |
Hi Leon!
On Friday 18 January 2002 10.39, you wrote:
> considering ARP and network device drivers.
I'm not quite sure I get your point. The current design is as follows:
* netif->output() uses arp_lookup() to find the MAC address of an IP address.
* If arp_lookup() returns NULL, arp_query() is called. arp_query() returns a
pbuf with an ARP query that is sent out on the network.
Since all arp_* stuff is done internally in netif->output(), no loops are
entered.
Since your DHCP client needs to send an ARP query, I guess the best way would
be (just as you suggest) to add a netif->linkoutput() and send the pbuf
returned by arp_query().
/adam
--
Adam Dunkels <address@hidden>
http://www.sics.se/~adam
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