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Diffstat (limited to 'net/ipv6/addrconf.c')
-rw-r--r--net/ipv6/addrconf.c88
1 files changed, 60 insertions, 28 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 1bbf744c2cc3..80449121afa2 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1126,8 +1126,7 @@ retry:
ift = !max_addresses ||
ipv6_count_addresses(idev) < max_addresses ?
- ipv6_add_addr(idev, &addr, tmp_plen,
- ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK,
+ ipv6_add_addr(idev, &addr, tmp_plen, ipv6_addr_scope(&addr),
addr_flags) : NULL;
if (IS_ERR_OR_NULL(ift)) {
in6_ifa_put(ifp);
@@ -2402,6 +2401,7 @@ err_exit:
* Manual configuration of address on an interface
*/
static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx,
+ const struct in6_addr *peer_pfx,
unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
__u32 valid_lft)
{
@@ -2457,6 +2457,8 @@ static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *p
ifp->valid_lft = valid_lft;
ifp->prefered_lft = prefered_lft;
ifp->tstamp = jiffies;
+ if (peer_pfx)
+ ifp->peer_addr = *peer_pfx;
spin_unlock_bh(&ifp->lock);
addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
@@ -2526,7 +2528,7 @@ int addrconf_add_ifaddr(struct net *net, void __user *arg)
return -EFAULT;
rtnl_lock();
- err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
+ err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL,
ireq.ifr6_prefixlen, IFA_F_PERMANENT,
INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
rtnl_unlock();
@@ -2826,9 +2828,9 @@ static void addrconf_ip6_tnl_config(struct net_device *dev)
}
static int addrconf_notify(struct notifier_block *this, unsigned long event,
- void *data)
+ void *ptr)
{
- struct net_device *dev = (struct net_device *) data;
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct inet6_dev *idev = __in6_dev_get(dev);
int run_pending = 0;
int err;
@@ -3612,18 +3614,20 @@ restart:
rcu_read_unlock_bh();
}
-static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local)
+static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local,
+ struct in6_addr **peer_pfx)
{
struct in6_addr *pfx = NULL;
+ *peer_pfx = NULL;
+
if (addr)
pfx = nla_data(addr);
if (local) {
if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
- pfx = NULL;
- else
- pfx = nla_data(local);
+ *peer_pfx = pfx;
+ pfx = nla_data(local);
}
return pfx;
@@ -3641,7 +3645,7 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
struct net *net = sock_net(skb->sk);
struct ifaddrmsg *ifm;
struct nlattr *tb[IFA_MAX+1];
- struct in6_addr *pfx;
+ struct in6_addr *pfx, *peer_pfx;
int err;
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
@@ -3649,7 +3653,7 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
return err;
ifm = nlmsg_data(nlh);
- pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
+ pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
if (pfx == NULL)
return -EINVAL;
@@ -3707,7 +3711,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
struct net *net = sock_net(skb->sk);
struct ifaddrmsg *ifm;
struct nlattr *tb[IFA_MAX+1];
- struct in6_addr *pfx;
+ struct in6_addr *pfx, *peer_pfx;
struct inet6_ifaddr *ifa;
struct net_device *dev;
u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
@@ -3719,7 +3723,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
return err;
ifm = nlmsg_data(nlh);
- pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
+ pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
if (pfx == NULL)
return -EINVAL;
@@ -3747,7 +3751,7 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
* It would be best to check for !NLM_F_CREATE here but
* userspace alreay relies on not having to provide this.
*/
- return inet6_addr_add(net, ifm->ifa_index, pfx,
+ return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx,
ifm->ifa_prefixlen, ifa_flags,
preferred_lft, valid_lft);
}
@@ -3804,6 +3808,7 @@ static inline int rt_scope(int ifa_scope)
static inline int inet6_ifaddr_msgsize(void)
{
return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
+ + nla_total_size(16) /* IFA_LOCAL */
+ nla_total_size(16) /* IFA_ADDRESS */
+ nla_total_size(sizeof(struct ifa_cacheinfo));
}
@@ -3842,13 +3847,22 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
valid = INFINITY_LIFE_TIME;
}
- if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0 ||
- put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0) {
- nlmsg_cancel(skb, nlh);
- return -EMSGSIZE;
- }
+ if (!ipv6_addr_any(&ifa->peer_addr)) {
+ if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 ||
+ nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0)
+ goto error;
+ } else
+ if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0)
+ goto error;
+
+ if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
+ goto error;
return nlmsg_end(skb, nlh);
+
+error:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
}
static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
@@ -4048,7 +4062,7 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
struct net *net = sock_net(in_skb->sk);
struct ifaddrmsg *ifm;
struct nlattr *tb[IFA_MAX+1];
- struct in6_addr *addr = NULL;
+ struct in6_addr *addr = NULL, *peer;
struct net_device *dev = NULL;
struct inet6_ifaddr *ifa;
struct sk_buff *skb;
@@ -4058,7 +4072,7 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
if (err < 0)
goto errout;
- addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL]);
+ addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
if (addr == NULL) {
err = -EINVAL;
goto errout;
@@ -4566,11 +4580,26 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
ip6_ins_rt(ifp->rt);
if (ifp->idev->cnf.forwarding)
addrconf_join_anycast(ifp);
+ if (!ipv6_addr_any(&ifp->peer_addr))
+ addrconf_prefix_route(&ifp->peer_addr, 128,
+ ifp->idev->dev, 0, 0);
break;
case RTM_DELADDR:
if (ifp->idev->cnf.forwarding)
addrconf_leave_anycast(ifp);
addrconf_leave_solict(ifp->idev, &ifp->addr);
+ if (!ipv6_addr_any(&ifp->peer_addr)) {
+ struct rt6_info *rt;
+ struct net_device *dev = ifp->idev->dev;
+
+ rt = rt6_lookup(dev_net(dev), &ifp->peer_addr, NULL,
+ dev->ifindex, 1);
+ if (rt) {
+ dst_hold(&rt->dst);
+ if (ip6_del_rt(rt))
+ dst_free(&rt->dst);
+ }
+ }
dst_hold(&ifp->rt->dst);
if (ip6_del_rt(ifp->rt))
@@ -4591,13 +4620,13 @@ static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
#ifdef CONFIG_SYSCTL
static
-int addrconf_sysctl_forward(ctl_table *ctl, int write,
+int addrconf_sysctl_forward(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
int *valp = ctl->data;
int val = *valp;
loff_t pos = *ppos;
- ctl_table lctl;
+ struct ctl_table lctl;
int ret;
/*
@@ -4618,13 +4647,16 @@ int addrconf_sysctl_forward(ctl_table *ctl, int write,
static void dev_disable_change(struct inet6_dev *idev)
{
+ struct netdev_notifier_info info;
+
if (!idev || !idev->dev)
return;
+ netdev_notifier_info_init(&info, idev->dev);
if (idev->cnf.disable_ipv6)
- addrconf_notify(NULL, NETDEV_DOWN, idev->dev);
+ addrconf_notify(NULL, NETDEV_DOWN, &info);
else
- addrconf_notify(NULL, NETDEV_UP, idev->dev);
+ addrconf_notify(NULL, NETDEV_UP, &info);
}
static void addrconf_disable_change(struct net *net, __s32 newf)
@@ -4673,13 +4705,13 @@ static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
}
static
-int addrconf_sysctl_disable(ctl_table *ctl, int write,
+int addrconf_sysctl_disable(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
int *valp = ctl->data;
int val = *valp;
loff_t pos = *ppos;
- ctl_table lctl;
+ struct ctl_table lctl;
int ret;
/*
@@ -4701,7 +4733,7 @@ int addrconf_sysctl_disable(ctl_table *ctl, int write,
static struct addrconf_sysctl_table
{
struct ctl_table_header *sysctl_header;
- ctl_table addrconf_vars[DEVCONF_MAX+1];
+ struct ctl_table addrconf_vars[DEVCONF_MAX+1];
} addrconf_sysctl __read_mostly = {
.sysctl_header = NULL,
.addrconf_vars = {
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.