Socket::Ifaddr#dstaddr

static VALUE
ifaddr_dstaddr(VALUE self)
{
    struct ifaddrs *ifa = get_ifaddrs(self);
    if ((ifa->ifa_flags & IFF_POINTOPOINT) && ifa->ifa_dstaddr)
        return rsock_sockaddr_obj(ifa->ifa_dstaddr, rsock_sockaddr_len(ifa->ifa_dstaddr));
    return Qnil;
}