Re: IPv6 sending to a device without a route

[Andrew May]

Chinh Nguyen wrote:
> If your interface is Point-to-Point, can you use MSG_DONTROUTE flag with
> sendmsg?
> 

I just tried the MSG_DONTROUTE flag and it doesn't seem to make a
difference. And in the linux/net/ipv6/udp.c file I don't see where the
msg->msg_flags is checked for that, or passed to a function that would
check it.
And from the IPv4 land I think it just means don't use a gateway, not
ignore the routes.

I tried the setsocketopt SO_DONTROUTE too and no luck.

Then I tried the IPV6_NEXTHOP cmsg header, and it doesn't seem to be
supported yet.
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