Re: [PATCH net] net: ipv6: Fix ping to link-local addresses.

On Tue, Aug 9, 2016 at 6:35 AM, David Miller [off-list ref] wrote:

We should always give sk_bound_dev_if the highest priority.

Also, we should amend, not delete, the check against the scope
ID in the sockaddr.  As explained by YOSHIFUJI Hideaki.

Sure, I can do that.

Note that pretty much every sendmsg codepath allows other data to take
precedence over sk_bound_dev_if:

- udpv6_sendmsg: if sin6_scope_id specified on a scoped address
- rawv6_sendmsg: if sin6_scope_id specified on a scoped address
- l2tp_ip6_sendmsg: if sin6_scope_id specified on a scoped address
- ip_cmsg_send: if IP_PKTINFO or IPV6_PKTINFO specified

What should I do about those? -EINVAL? Ignore the conflicting data? Leave as is?