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-rw-r--r--include/linux/ipv6_route.h1
-rw-r--r--include/net/if_inet6.h1
-rw-r--r--net/ipv6/addrconf.c106
-rw-r--r--net/ipv6/icmp.c16
-rw-r--r--net/ipv6/route.c13
5 files changed, 120 insertions, 17 deletions
diff --git a/include/linux/ipv6_route.h b/include/linux/ipv6_route.h
index e2f935038013..d7c41d1d706a 100644
--- a/include/linux/ipv6_route.h
+++ b/include/linux/ipv6_route.h
@@ -18,6 +18,7 @@
fallback, no routers on link */
#define RTF_ADDRCONF 0x00040000 /* addrconf route - RA */
#define RTF_PREFIX_RT 0x00080000 /* A prefix only route - RA */
+#define RTF_ANYCAST 0x00100000 /* Anycast */
#define RTF_NONEXTHOP 0x00200000 /* route with no nexthop */
#define RTF_EXPIRES 0x00400000
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index e97a9accb71d..d8234f9bd4c4 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -24,6 +24,7 @@
#define IF_RA_MANAGED 0x40
#define IF_RA_RCVD 0x20
#define IF_RS_SENT 0x10
+#define IF_READY 0x80000000
/* prefix flags */
#define IF_PREFIX_ONLINK 0x01
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e717a034c953..510220f2ae8b 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -137,6 +137,7 @@ static int addrconf_ifdown(struct net_device *dev, int how);
static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
static void addrconf_dad_timer(unsigned long data);
static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
+static void addrconf_dad_run(struct inet6_dev *idev);
static void addrconf_rs_timer(unsigned long data);
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
@@ -388,6 +389,9 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
}
#endif
+ if (netif_carrier_ok(dev))
+ ndev->if_flags |= IF_READY;
+
write_lock_bh(&addrconf_lock);
dev->ip6_ptr = ndev;
write_unlock_bh(&addrconf_lock);
@@ -415,6 +419,7 @@ static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
if ((idev = ipv6_add_dev(dev)) == NULL)
return NULL;
}
+
if (dev->flags&IFF_UP)
ipv6_mc_up(idev);
return idev;
@@ -904,11 +909,18 @@ int ipv6_dev_get_saddr(struct net_device *daddr_dev,
score.addr_type = __ipv6_addr_type(&ifa->addr);
- /* Rule 0: Candidate Source Address (section 4)
+ /* Rule 0:
+ * - Tentative Address (RFC2462 section 5.4)
+ * - A tentative address is not considered
+ * "assigned to an interface" in the traditional
+ * sense.
+ * - Candidate Source Address (section 4)
* - In any case, anycast addresses, multicast
* addresses, and the unspecified address MUST
* NOT be included in a candidate set.
*/
+ if (ifa->flags & IFA_F_TENTATIVE)
+ continue;
if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
score.addr_type & IPV6_ADDR_MULTICAST)) {
LIMIT_NETDEBUG(KERN_DEBUG
@@ -1216,10 +1228,8 @@ int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
/* Gets referenced address, destroys ifaddr */
-void addrconf_dad_failure(struct inet6_ifaddr *ifp)
+void addrconf_dad_stop(struct inet6_ifaddr *ifp)
{
- if (net_ratelimit())
- printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
if (ifp->flags&IFA_F_PERMANENT) {
spin_lock_bh(&ifp->lock);
addrconf_del_timer(ifp);
@@ -1245,6 +1255,12 @@ void addrconf_dad_failure(struct inet6_ifaddr *ifp)
ipv6_del_addr(ifp);
}
+void addrconf_dad_failure(struct inet6_ifaddr *ifp)
+{
+ if (net_ratelimit())
+ printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
+ addrconf_dad_stop(ifp);
+}
/* Join to solicited addr multicast group. */
@@ -2134,9 +2150,42 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
{
struct net_device *dev = (struct net_device *) data;
struct inet6_dev *idev = __in6_dev_get(dev);
+ int run_pending = 0;
switch(event) {
case NETDEV_UP:
+ case NETDEV_CHANGE:
+ if (event == NETDEV_UP) {
+ if (!netif_carrier_ok(dev)) {
+ /* device is not ready yet. */
+ printk(KERN_INFO
+ "ADDRCONF(NETDEV_UP): %s: "
+ "link is not ready\n",
+ dev->name);
+ break;
+ }
+ } else {
+ if (!netif_carrier_ok(dev)) {
+ /* device is still not ready. */
+ break;
+ }
+
+ if (idev) {
+ if (idev->if_flags & IF_READY) {
+ /* device is already configured. */
+ break;
+ }
+ idev->if_flags |= IF_READY;
+ }
+
+ printk(KERN_INFO
+ "ADDRCONF(NETDEV_CHANGE): %s: "
+ "link becomes ready\n",
+ dev->name);
+
+ run_pending = 1;
+ }
+
switch(dev->type) {
case ARPHRD_SIT:
addrconf_sit_config(dev);
@@ -2153,6 +2202,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
break;
};
if (idev) {
+ if (run_pending)
+ addrconf_dad_run(idev);
+
/* If the MTU changed during the interface down, when the
interface up, the changed MTU must be reflected in the
idev as well as routers.
@@ -2187,8 +2239,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
*/
addrconf_ifdown(dev, event != NETDEV_DOWN);
break;
- case NETDEV_CHANGE:
- break;
+
case NETDEV_CHANGENAME:
#ifdef CONFIG_SYSCTL
if (idev) {
@@ -2269,7 +2320,7 @@ static int addrconf_ifdown(struct net_device *dev, int how)
/* Step 3: clear flags for stateless addrconf */
if (how != 1)
- idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD);
+ idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
/* Step 4: clear address list */
#ifdef CONFIG_IPV6_PRIVACY
@@ -2378,11 +2429,20 @@ out:
/*
* Duplicate Address Detection
*/
+static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
+{
+ unsigned long rand_num;
+ struct inet6_dev *idev = ifp->idev;
+
+ rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
+ ifp->probes = idev->cnf.dad_transmits;
+ addrconf_mod_timer(ifp, AC_DAD, rand_num);
+}
+
static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
{
struct inet6_dev *idev = ifp->idev;
struct net_device *dev = idev->dev;
- unsigned long rand_num;
addrconf_join_solict(dev, &ifp->addr);
@@ -2391,7 +2451,6 @@ static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
flags);
net_srandom(ifp->addr.s6_addr32[3]);
- rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
read_lock_bh(&idev->lock);
if (ifp->dead)
@@ -2408,8 +2467,17 @@ static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
return;
}
- ifp->probes = idev->cnf.dad_transmits;
- addrconf_mod_timer(ifp, AC_DAD, rand_num);
+ if (idev->if_flags & IF_READY)
+ addrconf_dad_kick(ifp);
+ else {
+ /*
+ * If the defice is not ready:
+ * - keep it tentative if it is a permanent address.
+ * - otherwise, kill it.
+ */
+ in6_ifa_hold(ifp);
+ addrconf_dad_stop(ifp);
+ }
spin_unlock_bh(&ifp->lock);
out:
@@ -2493,6 +2561,22 @@ static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
}
}
+static void addrconf_dad_run(struct inet6_dev *idev) {
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
+ spin_lock_bh(&ifp->lock);
+ if (!(ifp->flags & IFA_F_TENTATIVE)) {
+ spin_unlock_bh(&ifp->lock);
+ continue;
+ }
+ spin_unlock_bh(&ifp->lock);
+ addrconf_dad_kick(ifp);
+ }
+ read_unlock_bh(&idev->lock);
+}
+
#ifdef CONFIG_PROC_FS
struct if6_iter_state {
int bucket;
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 34a332225c17..6ec6a2b549bb 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -328,8 +328,10 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
iif = skb->dev->ifindex;
/*
- * Must not send if we know that source is Anycast also.
- * for now we don't know that.
+ * Must not send error if the source does not uniquely
+ * identify a single node (RFC2463 Section 2.4).
+ * We check unspecified / multicast addresses here,
+ * and anycast addresses will be checked later.
*/
if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: addr_any/mcast source\n");
@@ -373,6 +375,16 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
err = ip6_dst_lookup(sk, &dst, &fl);
if (err)
goto out;
+
+ /*
+ * We won't send icmp if the destination is known
+ * anycast.
+ */
+ if (((struct rt6_info *)dst)->rt6i_flags & RTF_ANYCAST) {
+ LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: acast source\n");
+ goto out_dst_release;
+ }
+
if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
goto out;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 7c68bfbee361..66140f13d119 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -413,11 +413,14 @@ static struct rt6_info *rt6_cow(struct rt6_info *ort, struct in6_addr *daddr,
rt = ip6_rt_copy(ort);
if (rt) {
- ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
-
- if (!(rt->rt6i_flags&RTF_GATEWAY))
+ if (!(rt->rt6i_flags&RTF_GATEWAY)) {
+ if (rt->rt6i_dst.plen != 128 &&
+ ipv6_addr_equal(&rt->rt6i_dst.addr, daddr))
+ rt->rt6i_flags |= RTF_ANYCAST;
ipv6_addr_copy(&rt->rt6i_gateway, daddr);
+ }
+ ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
rt->rt6i_dst.plen = 128;
rt->rt6i_flags |= RTF_CACHE;
rt->u.dst.flags |= DST_HOST;
@@ -1413,7 +1416,9 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
rt->u.dst.obsolete = -1;
rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
- if (!anycast)
+ if (anycast)
+ rt->rt6i_flags |= RTF_ANYCAST;
+ else
rt->rt6i_flags |= RTF_LOCAL;
rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
if (rt->rt6i_nexthop == NULL) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 20:51:39 +0000