From: Rémi Denis-Courmont Date: Mon, 13 Jun 2005 22:01:34 +0000 (-0700) Subject: [IPv6] Don't generate temporary for TUN devices X-Git-Tag: v2.6.12~28^2~6 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=77bd91967a97e5b94ae36113efe1d9e4f68a716e;p=linux-2.6 [IPv6] Don't generate temporary for TUN devices Userland layer-2 tunneling devices allocated through the TUNTAP driver (drivers/net/tun.c) have a type of ARPHRD_NONE, and have no link-layer address. The kernel complains at regular interval when IPv6 Privacy extension are enabled because it can't find an hardware address : Dec 29 11:02:04 auguste kernel: __ipv6_regen_rndid(idev=cb3e0c00): cannot get EUI64 identifier; use random bytes. IPv6 Privacy extensions should probably be disabled on that sort of device. They won't work anyway. If userland wants a more usual Ethernet-ish interface with usual IPv6 autoconfiguration, it will use a TAP device with an emulated link-layer and a random hardware address rather than a TUN device. As far as I could fine, TUN virtual device from TUNTAP is the very only sort of device using ARPHRD_NONE as kernel device type. Signed-off-by: Rémi Denis-Courmont Acked-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller --- diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 7744a25926..2720899d51 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -372,6 +372,7 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev) ndev->regen_timer.data = (unsigned long) ndev; if ((dev->flags&IFF_LOOPBACK) || dev->type == ARPHRD_TUNNEL || + dev->type == ARPHRD_NONE || dev->type == ARPHRD_SIT) { printk(KERN_INFO "Disabled Privacy Extensions on device %p(%s)\n",