[lwip-users] Re: [lwip] Problem in ARP

[Leon Woestenberg]

Hi,

> From: "Mumtaz Ahmad" <address@hidden>
> There is a problem in sending the first packet when arp table is empty .
TCP
> manages it since the packets are usually retransmitted after timer expiry
> but in case of UDP is fails completely . I am trying to patch the area in
> ethernetif_out function but i hope you people must already have some
> solution :)?
>
This has been discussed on the list, yes.

My attempts was to patch the ethernet driver in a simple way; but then,
the first packet was queued, and the second got lost, then the first got
sent.

The proper (but costly) approach would be to queue outgoing packets
(with unresolved link address) behind each ARP table entry.

See Adam's mail in the archive on this, about 2 weeks ago (?).

Leon.


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