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[IPV6] ADDRCONF: Support RFC3484 configurable address selection policy table.

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Policy table is implemented as an RCU linear list since we do not expect
large list nor frequent updates.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki
2007-11-14 15:56:23 +09:00
committed by David S. Miller
parent 303065a854
commit 2a8cc6c890
6 changed files with 608 additions and 31 deletions
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40
net/ipv6/addrconf.c
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@@ -874,36 +874,6 @@ static inline int ipv6_saddr_preferred(int type)
return 0;
}
/* static matching label */
static inline int ipv6_addr_label(const struct in6_addr *addr, int type,
int ifindex)
{
/*
* prefix (longest match) label
* -----------------------------
* ::1/128 0
* ::/0 1
* 2002::/16 2
* ::/96 3
* ::ffff:0:0/96 4
* fc00::/7 5
* 2001::/32 6
*/
if (type & IPV6_ADDR_LOOPBACK)
return 0;
else if (type & IPV6_ADDR_COMPATv4)
return 3;
else if (type & IPV6_ADDR_MAPPED)
return 4;
else if (addr->s6_addr32[0] == htonl(0x20010000))
return 6;
else if (addr->s6_addr16[0] == htons(0x2002))
return 2;
else if ((addr->s6_addr[0] & 0xfe) == 0xfc)
return 5;
return 1;
}
int ipv6_dev_get_saddr(struct net_device *daddr_dev,
struct in6_addr *daddr, struct in6_addr *saddr)
{
@@ -4189,7 +4159,13 @@ EXPORT_SYMBOL(unregister_inet6addr_notifier);
int __init addrconf_init(void)
{
int err = 0;
int err;
if ((err = ipv6_addr_label_init()) < 0) {
printk(KERN_CRIT "IPv6 Addrconf: cannot initialize default policy table: %d.\n",
err);
return err;
}
/* The addrconf netdev notifier requires that loopback_dev
* has it's ipv6 private information allocated and setup
@@ -4240,6 +4216,8 @@ int __init addrconf_init(void)
__rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL, inet6_dump_ifmcaddr);
__rtnl_register(PF_INET6, RTM_GETANYCAST, NULL, inet6_dump_ifacaddr);
ipv6_addr_label_rtnl_register();
#ifdef CONFIG_SYSCTL
addrconf_sysctl.sysctl_header =
register_sysctl_table(addrconf_sysctl.addrconf_root_dir);