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ipv6: generate link local address for GRE tunnel

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Use same logic as SIT tunnel to handle link local address
for GRE tunnel. OSPFv3 requires link-local address to function.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2011-06-08 10:44:30 +00:00 committed by David S. Miller
parent 8ef207d63f
commit aee80b54b2
1 changed files with 35 additions and 0 deletions
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35
net/ipv6/addrconf.c
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@ -1559,6 +1559,11 @@ static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
return -1;
}
static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
{
return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
}
static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
{
switch (dev->type) {
@ -1572,6 +1577,8 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
return addrconf_ifid_infiniband(eui, dev);
case ARPHRD_SIT:
return addrconf_ifid_sit(eui, dev);
case ARPHRD_IPGRE:
return addrconf_ifid_gre(eui, dev);
}
return -1;
}
@ -2423,6 +2430,29 @@ static void addrconf_sit_config(struct net_device *dev)
}
#endif
#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
static void addrconf_gre_config(struct net_device *dev)
{
struct inet6_dev *idev;
struct in6_addr addr;
pr_info("ipv6: addrconf_gre_config(%s)\n", dev->name);
ASSERT_RTNL();
if ((idev = ipv6_find_idev(dev)) == NULL) {
printk(KERN_DEBUG "init gre: add_dev failed\n");
return;
}
ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
addrconf_prefix_route(&addr, 64, dev, 0, 0);
if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
addrconf_add_linklocal(idev, &addr);
}
#endif
static inline int
ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
{
@ -2538,6 +2568,11 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
case ARPHRD_SIT:
addrconf_sit_config(dev);
break;
#endif
#if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
case ARPHRD_IPGRE:
addrconf_gre_config(dev);
break;
#endif
case ARPHRD_TUNNEL6:
addrconf_ip6_tnl_config(dev);