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

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Message-Id: <20160808.222030.1314134961786852070.davem@davemloft.net>
Date:	Mon, 08 Aug 2016 22:20:30 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	lorenzo@...gle.com
Cc:	netdev@...r.kernel.org, hannes@...essinduktion.org, ek@...gle.com,
	hideaki.yoshifuji@...aclelinux.com
Subject: Re: [PATCH net] net: ipv6: Fix ping to link-local addresses.

From: Lorenzo Colitti <lorenzo@...gle.com>
Date: Tue, 9 Aug 2016 10:00:25 +0900

> 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?

That's a good point, I guess this needs some more thought.