Re: [lwip-users] lwip 1.3 UDP - DNS strange behaviour

[address@hidden]

Sergio Sider wrote:
> I am using lwip "ported" by LuminaryMicro, and CodeSourcery (GCC)
>
> #define SYS_LIGHTWEIGHT_PROT            1           // default is 0
> #define NO_SYS                          1           // default is 0
>
> On interesting fact: A custom UDP message I send on the beggining was
> not transmitted also although the program thought it was. After a few
> seconds, the udp messages started to work. But DNS don´t, but that's
> because of the timeout that never occurs, so there is no retry.
>   
Have you made sure timeouts work at all in your port? The default lwIP 
source provides no timoeut implementation in case of setting NO_SYS to 
1! This is a known limitation and before 1.3.0 we had a discussion about 
that, but it has kind of lead nowhere yet...


Simon