From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Tue, 15 Dec 2015 21:59:12 +0000 (+0100)
Subject: ipv6: automatically enable stable privacy mode if stable_secret set
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9b29c6962b70f232cde4076b1020191e1be0889d;p=openwrt%2Fstaging%2Fblogic.git

ipv6: automatically enable stable privacy mode if stable_secret set

Bjørn reported that while we switch all interfaces to privacy stable mode
when setting the secret, we don't set this mode for new interfaces. This
does not make sense, so change this behaviour.

Fixes: 622c81d57b392cc ("ipv6: generation of stable privacy addresses for link-local and autoconf")
Reported-by: Bjørn Mork <bjorn@mork.no>
Cc: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index a57d3d17a620..17f8e7ea133b 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -350,6 +350,12 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
 	setup_timer(&ndev->rs_timer, addrconf_rs_timer,
 		    (unsigned long)ndev);
 	memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
+
+	if (ndev->cnf.stable_secret.initialized)
+		ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
+	else
+		ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64;
+
 	ndev->cnf.mtu6 = dev->mtu;
 	ndev->cnf.sysctl = NULL;
 	ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);