getifaddrs() and IPv6 link-local addresses

[Simon Perreault]

Hi,

Is it normal that getifaddrs() leaks the kernel's scope ID 
representation of IPv6 link-local addresses?

In other words, is every user of getifaddrs() expected to fill the 
sin6_scope_id member from the 3rd byte of the address, and then clear 
that byte?

Looking at ifconfig.c, it's full of calls to this function:

void
in6_fillscopeid(struct sockaddr_in6 *sin6)
{
#ifdef __KAME__
        if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
                sin6->sin6_scope_id =
                        ntohs(*(u_int16_t *)&sin6->sin6_addr.s6_addr[2]);
                sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0;
        }
#endif /* __KAME__ */
}

Shouldn't this be done once in getifaddrs() itself instead of replicated 
everywhere it's used?

Simon