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[NETNS][IPV6]: inet6_addr - check ipv6 address per namespace

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When a new address is added, we must check if the new address does not
already exists.  This patch makes this check to be aware of a network
namespace, so the check will look if the address already exists for
the specified network namespace. While the addresses are browsed, the
addresses which do not belong to the namespace are discarded.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Lezcano 2008-01-10 22:43:18 -08:00 committed by David S. Miller
parent 3c40090a0f
commit bfeade0870
10 changed files with 23 additions and 15 deletions
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4
include/net/addrconf.h
View File

@ -59,9 +59,11 @@ extern int addrconf_add_ifaddr(void __user *arg);
extern int addrconf_del_ifaddr(void __user *arg);
extern int addrconf_set_dstaddr(void __user *arg);
extern int ipv6_chk_addr(struct in6_addr *addr,
extern int ipv6_chk_addr(struct net *net,
struct in6_addr *addr,
struct net_device *dev,
int strict);
#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
extern int ipv6_chk_home_addr(struct in6_addr *addr);
#endif

6
net/ipv6/addrconf.c
View File

@ -1206,13 +1206,16 @@ static int ipv6_count_addresses(struct inet6_dev *idev)
return cnt;
}
int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
int ipv6_chk_addr(struct net *net, struct in6_addr *addr,
struct net_device *dev, int strict)
{
struct inet6_ifaddr * ifp;
u8 hash = ipv6_addr_hash(addr);
read_lock_bh(&addrconf_hash_lock);
for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
if (ifp->idev->dev->nd_net != net)
continue;
if (ipv6_addr_equal(&ifp->addr, addr) &&
!(ifp->flags&IFA_F_TENTATIVE)) {
if (dev == NULL || ifp->idev->dev == dev ||
@ -1223,7 +1226,6 @@ int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
read_unlock_bh(&addrconf_hash_lock);
return ifp != NULL;
}
EXPORT_SYMBOL(ipv6_chk_addr);
static

3
net/ipv6/af_inet6.c
View File

@ -314,7 +314,8 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
*/
v4addr = LOOPBACK4_IPV6;
if (!(addr_type & IPV6_ADDR_MULTICAST)) {
if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
if (!ipv6_chk_addr(&init_net, &addr->sin6_addr,
dev, 0)) {
if (dev)
dev_put(dev);
err = -EADDRNOTAVAIL;

2
net/ipv6/anycast.c
View File

@ -89,7 +89,7 @@ int ipv6_sock_ac_join(struct sock *sk, int ifindex, struct in6_addr *addr)
return -EPERM;
if (ipv6_addr_is_multicast(addr))
return -EINVAL;
if (ipv6_chk_addr(addr, NULL, 0))
if (ipv6_chk_addr(&init_net, addr, NULL, 0))
return -EINVAL;
pac = sock_kmalloc(sk, sizeof(struct ipv6_ac_socklist), GFP_KERNEL);

3
net/ipv6/datagram.c
View File

@ -549,7 +549,8 @@ int datagram_send_ctl(struct msghdr *msg, struct flowi *fl,
return -ENODEV;
}
}
if (!ipv6_chk_addr(&src_info->ipi6_addr, dev, 0)) {
if (!ipv6_chk_addr(&init_net, &src_info->ipi6_addr,
dev, 0)) {
if (dev)
dev_put(dev);
err = -EINVAL;

2
net/ipv6/icmp.c
View File

@ -332,7 +332,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
*/
addr_type = ipv6_addr_type(&hdr->daddr);
if (ipv6_chk_addr(&hdr->daddr, skb->dev, 0))
if (ipv6_chk_addr(&init_net, &hdr->daddr, skb->dev, 0))
saddr = &hdr->daddr;
/*

8
net/ipv6/ip6_tunnel.c
View File

@ -653,8 +653,8 @@ static inline int ip6_tnl_rcv_ctl(struct ip6_tnl *t)
ldev = dev_get_by_index(&init_net, p->link);
if ((ipv6_addr_is_multicast(&p->laddr) ||
likely(ipv6_chk_addr(&p->laddr, ldev, 0))) &&
likely(!ipv6_chk_addr(&p->raddr, NULL, 0)))
likely(ipv6_chk_addr(&init_net, &p->laddr, ldev, 0))) &&
likely(!ipv6_chk_addr(&init_net, &p->raddr, NULL, 0)))
ret = 1;
if (ldev)
@ -788,12 +788,12 @@ static inline int ip6_tnl_xmit_ctl(struct ip6_tnl *t)
if (p->link)
ldev = dev_get_by_index(&init_net, p->link);
if (unlikely(!ipv6_chk_addr(&p->laddr, ldev, 0)))
if (unlikely(!ipv6_chk_addr(&init_net, &p->laddr, ldev, 0)))
printk(KERN_WARNING
"%s xmit: Local address not yet configured!\n",
p->name);
else if (!ipv6_addr_is_multicast(&p->raddr) &&
unlikely(ipv6_chk_addr(&p->raddr, NULL, 0)))
unlikely(ipv6_chk_addr(&init_net, &p->raddr, NULL, 0)))
printk(KERN_WARNING
"%s xmit: Routing loop! "
"Remote address found on this node!\n",

2
net/ipv6/ndisc.c
View File

@ -653,7 +653,7 @@ static void ndisc_solicit(struct neighbour *neigh, struct sk_buff *skb)
struct in6_addr *target = (struct in6_addr *)&neigh->primary_key;
int probes = atomic_read(&neigh->probes);
if (skb && ipv6_chk_addr(&ipv6_hdr(skb)->saddr, dev, 1))
if (skb && ipv6_chk_addr(&init_net, &ipv6_hdr(skb)->saddr, dev, 1))
saddr = &ipv6_hdr(skb)->saddr;
if ((probes -= neigh->parms->ucast_probes) < 0) {

3
net/ipv6/raw.c
View File

@ -298,7 +298,8 @@ static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
v4addr = LOOPBACK4_IPV6;
if (!(addr_type & IPV6_ADDR_MULTICAST)) {
err = -EADDRNOTAVAIL;
if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
if (!ipv6_chk_addr(&init_net, &addr->sin6_addr,
dev, 0)) {
if (dev)
dev_put(dev);
goto out;

5
net/sctp/ipv6.c
View File

@ -556,7 +556,7 @@ static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp)
if (!(type & IPV6_ADDR_UNICAST))
return 0;
return ipv6_chk_addr(in6, NULL, 0);
return ipv6_chk_addr(&init_net, in6, NULL, 0);
}
/* This function checks if the address is a valid address to be used for
@ -858,7 +858,8 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
dev = dev_get_by_index(&init_net, addr->v6.sin6_scope_id);
if (!dev)
return 0;
if (!ipv6_chk_addr(&addr->v6.sin6_addr, dev, 0)) {
if (!ipv6_chk_addr(&init_net, &addr->v6.sin6_addr,
dev, 0)) {
dev_put(dev);
return 0;
}