RE: [lwip-devel] [task #6998] Implement IPPROTO_UDPLITE for Socket layer

[Goldschmidt Simon]

> Details:
> 
> It seems that some sockets API support UDP-Lite.
> 
> http://kernel.org/pub/linux/kernel/people/landley/kdocs/Docume
> ntation/networking/udplite.txt.
> http://www.erg.abdn.ac.uk/users/william/tools/UDPLite-patch.pdf.
> 
> I don't know what Linux currently support, but I propose to 
> support IPPROTO_UDPLITE in "proto" parameter for socket call:
> 
> s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDPLITE); 
> 
> To support that, the only thing to do is to change in lwip_socket
> 
> case SOCK_DGRAM:
>   conn = netconn_new_with_callback(NETCONN_UDP, event_callback);
> 
> By...
> 
> case SOCK_DGRAM:
>   conn =
> netconn_new_with_callback(((protocol==IPPROTO_UDPLITE)?NETCONN
> _UDPLITE:NETCONN_UDP),
> event_callback);
> 
> Or by a switch if you prefer...
> 
> I will submit if no objects...


We'd also need the set/getsockopts for setting the checksum length
on send (maybe also receive, see the rfc for udp lite).

Simon