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Re: glibc: inet6_rth_init returned an abnormal address?


On Fri, Dec 12, 2014 at 10:12:44AM +0800, wangyufen wrote:
> On 2014/12/11 18:41, OndÅej BÃlka wrote:
> > On Thu, Dec 11, 2014 at 05:29:48PM +0800, wangyufen wrote:
> >> Hi,
> >>
> >> I did some test on inet6_rth_init, inet6_rth_init returnned a invalid address;
> >> But I used inet6_rth_init_ww (the same implementation as inet6_rth_init) in my test code, It returnned a valid address.
> >> Dose anyone konw why?
> >>
> > Because you used implicit prototype. Compiler then assumes that prototype is
> > 
> > int inet6_rth_init (void *bp, socklen_t bp_len, int type, int segments)
> > 
> > and then sign-extends result, creating invalid pointer.
> > 
> > 
> Thanks for your reply, then in order to obtain a valid address,  how to use inet6_rth_init?
> 
>
add

#include <netinet/in.h>
 
> thanks,
> Wang


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