From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pablo Neira Ayuso <pablo@netfilter.org>
Subject: Re: Libmnl - Adding IPv6 Address in the interface
Date: Mon, 29 Aug 2016 13:40:16 +0200
Message-ID: <20160829114016.GA11200@salvia>
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To: Khawar Shehzad <shehzad.khawar@gmail.com>
Cc: netfilter@vger.kernel.org

On Mon, Aug 29, 2016 at 07:52:34AM +0100, Khawar Shehzad wrote:
>         ifm = mnl_nlmsg_put_extra_header(nlh, sizeof(*ifm));
> 
>         ifm->ifa_family = AF_INET6;
>         ifm->ifa_prefixlen = 64;
>         ifm->ifa_flags = IFA_F_PERMANENT;
>         ifm->ifa_scope = RT_SCOPE_UNIVERSE;
>         /* TODO get interaface name from user or configuration*/
>         ifm->ifa_index = if_nametoindex("eth0");
>         unsigned char eipn[16];
>         inet_pton(AF_INET6, eip, eipn);

eipn should be 'struct in6_addr' instead.

>         mnl_attr_put(nlh, IFA_ADDRESS, 16,eipn);

So this looks like:

          mnl_attr_put(nlh, IFA_ADDRESS, sizeof(eipn), &eipn);