Doew LWIP do what I need? UDP send/rcv?

Hi

I've asked this question directly of Altera sales and gotten a vague answer. But I need a specific answer so I know whether to bid a task.

My customer needs to translate UDP over ethernet messages into a serial format. My plan would be to use Nios in an FPGA togther with the LAN91C111 Mac/Phy.

The Nios program to convert from a UDP payload into the proprietary serial format is straightforward. The question is how much code must be written to talk to the 91C111 and send/receive UDP packets.

My impression is that the LWIP software package provided on this site does 90% of the job. My impression is:

1. It will send and received UDP packets and does everything necessary to run the 91C111;

2. Does NOT require any purchased OS

3. Can be used royalty free

4. And it really, actually works.

Am I right? Is this the ticket? If not, are there any alternatives? Writing the whole thing from scratch is way beyond the scope that could be considered.

Thanks in advance