Re: [lwip-users] lwIP and Ping

[address@hidden]

HM2 wrote:
> Why then is the sys_now() prototype in sys.h ?  To me that would suggest
> that the function belongs in sys.c
> If you want the function in arch_sys.c, why isn't the prototype in
> arch_sys.h ?
>   
Oh, I'm sorry I haven't mentioned that, but sys.h is a core file of lwIP 
while sys_arch.h isn't: it's a file every port has to provide. As a 
consequence of that, a prototype used in lwIP core cannot be put into 
sys_arch.h, as it isn't included in the core files. To put it simple for 
port-specific functions: core headers = prototypes, port file = 
implementation!
> >From what I can tell the types required  that are missing come from
> sys/time.h in Unix which does not exist in the lwIP file set.  So those
> items are going to need to be added somewhere, I guess in sys_arch.h
>   
_Or_, you could just put the include at the top of sys_arch.c, where the 
function sys_(unix_)now() is implemented. Oh, wait, someone else already 
had that idea: 
http://cvs.savannah.gnu.org/viewvc/contrib/ports/unix/sys_arch.c?revision=1.25&root=lwip&view=markup

Sorry to be joking. To make yourself familiar with lwIP core vs. port it 
would help to take a look at the contrib module and the example ports to 
run lwIP under unix/linux and win32 (aka. windows). I can't remember my 
learning curve with lwIP but I know documentation is not the highest 
priority as with most open source projects ;-) However, I hoped that the 
wiki + source code in the contrib module provided some guidance...

Simon