* Behaviour of sysctl net.ipv6.conf.all.* parameters
@ 2015-06-24 14:17 Tero Marttila
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From: Tero Marttila @ 2015-06-24 14:17 UTC (permalink / raw)
To: netdev
Hi,
I was exploring the behavior of various net.ipv6.conf.all parameters
such as use_tempaddr on Linux 3.16, but the behavior doesn't seem to
make sense.
The following settings do *not* result in privacy addresses on eth0:
net.ipv6.conf.all.use_tempaddr=2
net.ipv6.conf.eth0.use_tempaddr=0
But the following settings do:
net.ipv6.conf.all.use_tempaddr=0
net.ipv6.conf.eth0.use_tempaddr=2
This doesn't make sense per any of the AND/OR/MAX semantics as used for
e.g. net.ipv4.conf.all.
Looking at the net/ipv6/addrconf.c implementation, I can figure out
where net.ipv6.conf.default is implemented, and some handling for
specific devconf_all parameters (forwarding, disable_ipv6, proxy_ndp),
but I am unable to find any link between struct
netns_ipv6.devconf_all.use_tempaddr and struct inet6_dev.cnf.use_tempaddr.
Does anyone have any pointers for where this linking logic would be
implemented, or are the majority of net.ipv6.conf.all.* sysctl
parameters actually complete no-ops?
-- Tero Marttila
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