Brian,
OK, I see what you're trying to fix now.
I think the scope_id checks are not quite right-- they
should be something like this:
if (addr_type&IPV6_ADDR_LINKLOCAL) {
if (addr_len >= sizeof(struct sockaddr_in6)) {
if (sk->sk_bound_dev_if && usin->sin6_scope_id &&
sk->sk_bound_dev_if != usin->sin6_scope_id) {
err = -EINVAL;
goto out;
}
if (usin->sin6_scope_id)
sk->sk_bound_dev_if = usin->sin6_scope_id;
if (!sk->sk_bound_dev_if &&
(addr_type & IPV6_ADDR_MULTICAST))
fl.oif = np->mcast_oif;
}
/* connect to the link-local addres requires an interface */
if (!sk->sk_bound_dev_if) {
err = -EINVAL;
goto out;
}
}
That is (in English):
If I did an SO_BINDTODEVICE and specified sin6_scope_id,
then they better agree.
If I specified sin6_scope_id without SO_BINDTODEVICE, set
the device to that.
If I get this far without a device and it's multicast, use
mcast_oif
If I get all through that and don't have a device, EINVAL.
Does that work for you?
+-DLS
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