Initial import

1 files changed, 164 insertions, 0 deletions

diff --git a/net/ipv6/addrconf_core.c b/net/ipv6/addrconf_core.c
new file mode 100644
index 000000000..ca09bf49a
--- /dev/null
+++ b/net/ipv6/addrconf_core.c
@@ -0,0 +1,164 @@
+/*
+ * IPv6 library code, needed by static components when full IPv6 support is
+ * not configured or static.
+ */
+
+#include <linux/export.h>
+#include <net/ipv6.h>
+#include <net/addrconf.h>
+#include <net/ip.h>
+
+/* if ipv6 module registers this function is used by xfrm to force all
+ * sockets to relookup their nodes - this is fairly expensive, be
+ * careful
+ */
+void (*__fib6_flush_trees)(struct net *);
+EXPORT_SYMBOL(__fib6_flush_trees);
+
+#define IPV6_ADDR_SCOPE_TYPE(scope)	((scope) << 16)
+
+static inline unsigned int ipv6_addr_scope2type(unsigned int scope)
+{
+	switch (scope) {
+	case IPV6_ADDR_SCOPE_NODELOCAL:
+		return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
+			IPV6_ADDR_LOOPBACK);
+	case IPV6_ADDR_SCOPE_LINKLOCAL:
+		return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
+			IPV6_ADDR_LINKLOCAL);
+	case IPV6_ADDR_SCOPE_SITELOCAL:
+		return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
+			IPV6_ADDR_SITELOCAL);
+	}
+	return IPV6_ADDR_SCOPE_TYPE(scope);
+}
+
+int __ipv6_addr_type(const struct in6_addr *addr)
+{
+	__be32 st;
+
+	st = addr->s6_addr32[0];
+
+	/* Consider all addresses with the first three bits different of
+	   000 and 111 as unicasts.
+	 */
+	if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
+	    (st & htonl(0xE0000000)) != htonl(0xE0000000))
+		return (IPV6_ADDR_UNICAST |
+			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));
+
+	if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
+		/* multicast */
+		/* addr-select 3.1 */
+		return (IPV6_ADDR_MULTICAST |
+			ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
+	}
+
+	if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
+		return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST |
+			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL));		/* addr-select 3.1 */
+	if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
+		return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
+			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL));		/* addr-select 3.1 */
+	if ((st & htonl(0xFE000000)) == htonl(0xFC000000))
+		return (IPV6_ADDR_UNICAST |
+			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));			/* RFC 4193 */
+
+	if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
+		if (addr->s6_addr32[2] == 0) {
+			if (addr->s6_addr32[3] == 0)
+				return IPV6_ADDR_ANY;
+
+			if (addr->s6_addr32[3] == htonl(0x00000001))
+				return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
+					IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL));	/* addr-select 3.4 */
+
+			return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
+				IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));	/* addr-select 3.3 */
+		}
+
+		if (addr->s6_addr32[2] == htonl(0x0000ffff))
+			return (IPV6_ADDR_MAPPED |
+				IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));	/* addr-select 3.3 */
+	}
+
+	return (IPV6_ADDR_UNICAST |
+		IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));	/* addr-select 3.4 */
+}
+EXPORT_SYMBOL(__ipv6_addr_type);
+
+static ATOMIC_NOTIFIER_HEAD(inet6addr_chain);
+
+int register_inet6addr_notifier(struct notifier_block *nb)
+{
+	return atomic_notifier_chain_register(&inet6addr_chain, nb);
+}
+EXPORT_SYMBOL(register_inet6addr_notifier);
+
+int unregister_inet6addr_notifier(struct notifier_block *nb)
+{
+	return atomic_notifier_chain_unregister(&inet6addr_chain, nb);
+}
+EXPORT_SYMBOL(unregister_inet6addr_notifier);
+
+int inet6addr_notifier_call_chain(unsigned long val, void *v)
+{
+	return atomic_notifier_call_chain(&inet6addr_chain, val, v);
+}
+EXPORT_SYMBOL(inet6addr_notifier_call_chain);
+
+const struct ipv6_stub *ipv6_stub __read_mostly;
+EXPORT_SYMBOL_GPL(ipv6_stub);
+
+/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
+const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
+EXPORT_SYMBOL(in6addr_loopback);
+const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
+EXPORT_SYMBOL(in6addr_any);
+const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
+EXPORT_SYMBOL(in6addr_linklocal_allnodes);
+const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;
+EXPORT_SYMBOL(in6addr_linklocal_allrouters);
+const struct in6_addr in6addr_interfacelocal_allnodes = IN6ADDR_INTERFACELOCAL_ALLNODES_INIT;
+EXPORT_SYMBOL(in6addr_interfacelocal_allnodes);
+const struct in6_addr in6addr_interfacelocal_allrouters = IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT;
+EXPORT_SYMBOL(in6addr_interfacelocal_allrouters);
+const struct in6_addr in6addr_sitelocal_allrouters = IN6ADDR_SITELOCAL_ALLROUTERS_INIT;
+EXPORT_SYMBOL(in6addr_sitelocal_allrouters);
+
+static void snmp6_free_dev(struct inet6_dev *idev)
+{
+	kfree(idev->stats.icmpv6msgdev);
+	kfree(idev->stats.icmpv6dev);
+	free_percpu(idev->stats.ipv6);
+}
+
+static void in6_dev_finish_destroy_rcu(struct rcu_head *head)
+{
+	struct inet6_dev *idev = container_of(head, struct inet6_dev, rcu);
+
+	snmp6_free_dev(idev);
+	kfree(idev);
+}
+
+/* Nobody refers to this device, we may destroy it. */
+
+void in6_dev_finish_destroy(struct inet6_dev *idev)
+{
+	struct net_device *dev = idev->dev;
+
+	WARN_ON(!list_empty(&idev->addr_list));
+	WARN_ON(idev->mc_list);
+	WARN_ON(timer_pending(&idev->rs_timer));
+
+#ifdef NET_REFCNT_DEBUG
+	pr_debug("%s: %s\n", __func__, dev ? dev->name : "NIL");
+#endif
+	dev_put(dev);
+	if (!idev->dead) {
+		pr_warn("Freeing alive inet6 device %p\n", idev);
+		return;
+	}
+	call_rcu(&idev->rcu, in6_dev_finish_destroy_rcu);
+}
+EXPORT_SYMBOL(in6_dev_finish_destroy);