This is the mail archive of the
mailing list for the glibc project.
Re: glibc: inet6_rth_init returned an abnormal address?
- From: wangyufen <wangyufen at huawei dot com>
- To: OndÅej BÃlka <neleai at seznam dot cz>
- Cc: <libc-alpha at sourceware dot org>
- Date: Sat, 13 Dec 2014 15:04:45 +0800
- Subject: Re: glibc: inet6_rth_init returned an abnormal address?
- Authentication-results: sourceware.org; auth=none
- References: <5489640C dot 2050400 at huawei dot com> <20141211104142 dot GA10717 at domone> <548A4F1C dot 2020009 at huawei dot com> <20141212161149 dot GB7878 at domone>
On 2014/12/13 0:11, OndÅej BÃlka wrote:
> 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:
>>>> 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?
> #include <netinet/in.h>
It's already added, or the test code can't compiled.
I think it's not the reason of inet6_rth_init returned an invalid address.