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[IPV6]: Unify ip6_onlink() and ipip6_onlink().

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Both are identical, let's create ipv6_chk_prefix() and use it
in both places.
This commit is contained in:
YOSHIFUJI Hideaki 2008-03-15 22:54:23 -04:00
parent 6294e00073
commit 52eeeb8481
4 changed files with 31 additions and 50 deletions
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4
include/net/addrconf.h
View file

@ -71,6 +71,10 @@ extern int ipv6_chk_addr(struct net *net,
extern int ipv6_chk_home_addr(struct net *net,
struct in6_addr *addr);
#endif
extern int ipv6_chk_prefix(struct in6_addr *addr,
struct net_device *dev);
extern struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
struct in6_addr *addr,
struct net_device *dev,

25
net/ipv6/addrconf.c
View file

@ -1249,6 +1249,31 @@ int ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
return ifp != NULL;
}
int ipv6_chk_prefix(struct in6_addr *addr, struct net_device *dev)
{
struct inet6_dev *idev;
struct inet6_ifaddr *ifa;
int onlink;
onlink = 0;
rcu_read_lock();
idev = __in6_dev_get(dev);
if (idev) {
read_lock_bh(&idev->lock);
for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
onlink = ipv6_prefix_equal(addr, &ifa->addr,
ifa->prefix_len);
if (onlink)
break;
}
read_unlock_bh(&idev->lock);
}
rcu_read_unlock();
return onlink;
}
EXPORT_SYMBOL(ipv6_chk_prefix);
struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, struct in6_addr *addr,
struct net_device *dev, int strict)
{

25
net/ipv6/anycast.c
View file

@ -48,29 +48,6 @@ static int ipv6_dev_ac_dec(struct net_device *dev, struct in6_addr *addr);
/* Big ac list lock for all the sockets */
static DEFINE_RWLOCK(ipv6_sk_ac_lock);
static int
ip6_onlink(struct in6_addr *addr, struct net_device *dev)
{
struct inet6_dev *idev;
struct inet6_ifaddr *ifa;
int onlink;
onlink = 0;
rcu_read_lock();
idev = __in6_dev_get(dev);
if (idev) {
read_lock_bh(&idev->lock);
for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
onlink = ipv6_prefix_equal(addr, &ifa->addr,
ifa->prefix_len);
if (onlink)
break;
}
read_unlock_bh(&idev->lock);
}
rcu_read_unlock();
return onlink;
}
/*
* socket join an anycast group
@ -142,7 +119,7 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
* This obviates the need for propagating anycast routes while
* still allowing some non-router anycast participation.
*/
if (!ip6_onlink(addr, dev)) {
if (!ipv6_chk_prefix(addr, dev)) {
if (ishost)
err = -EADDRNOTAVAIL;
if (err)

27
net/ipv6/sit.c
View file

@ -344,31 +344,6 @@ out:
return 0;
}
/* copied directly from anycast.c */
static int
ipip6_onlink(struct in6_addr *addr, struct net_device *dev)
{
struct inet6_dev *idev;
struct inet6_ifaddr *ifa;
int onlink;
onlink = 0;
rcu_read_lock();
idev = __in6_dev_get(dev);
if (idev) {
read_lock_bh(&idev->lock);
for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
onlink = ipv6_prefix_equal(addr, &ifa->addr,
ifa->prefix_len);
if (onlink)
break;
}
read_unlock_bh(&idev->lock);
}
rcu_read_unlock();
return onlink;
}
static int
isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
{
@ -386,7 +361,7 @@ isatap_chksrc(struct sk_buff *skb, struct iphdr *iph, struct ip_tunnel *t)
struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr;
if (ipv6_addr_is_isatap(addr6) &&
(addr6->s6_addr32[3] == iph->saddr) &&
ipip6_onlink(addr6, t->dev))
ipv6_chk_prefix(addr6, t->dev))
skb->ndisc_nodetype = NDISC_NODETYPE_HOST;
else
ok = 0;