Re: [lwip-users] ICMP port unreachable when using netconn UDP

[Jonathan Larmour]

Ben Bobbitt wrote:
> All I have done is to make the UDP related changes to the lwipopts.h 
> file, and then in the module that was previously a webserver example:  
>
> pxHTTPListener = netconn_new( NETCONN_UDP );
>
> addr.addr = htonl(0xc0a80002);  // my local ip 192.168.0.2
>
> netconn_bind(pxHTTPListener, &addr, webHttpPort );
>
> addr.addr = htonl(0xc0a80065);  // ip of the remote system
>
> netconn_connect(pxHTTPListener,&addr,webHttpPort);

You shouldn't need to do a connect if you receive. But if you do it should 
precisely match the remote end's IP/port. I doubt that your remote system 
192.168.0.65 is sending _from_ webHttpPort, and is probably using a random 
high port number.

So just don't do the connect.

Jifl
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