Initial import

1 files changed, 362 insertions, 0 deletions

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
new file mode 100644
index 000000000..80456f72d
--- /dev/null
+++ b/include/net/addrconf.h
@@ -0,0 +1,362 @@
+#ifndef _ADDRCONF_H
+#define _ADDRCONF_H
+
+#define MAX_RTR_SOLICITATIONS		3
+#define RTR_SOLICITATION_INTERVAL	(4*HZ)
+
+#define MIN_VALID_LIFETIME		(2*3600)	/* 2 hours */
+
+#define TEMP_VALID_LIFETIME		(7*86400)
+#define TEMP_PREFERRED_LIFETIME		(86400)
+#define REGEN_MAX_RETRY			(3)
+#define MAX_DESYNC_FACTOR		(600)
+
+#define ADDR_CHECK_FREQUENCY		(120*HZ)
+
+#define IPV6_MAX_ADDRESSES		16
+
+#define ADDRCONF_TIMER_FUZZ_MINUS	(HZ > 50 ? HZ / 50 : 1)
+#define ADDRCONF_TIMER_FUZZ		(HZ / 4)
+#define ADDRCONF_TIMER_FUZZ_MAX		(HZ)
+
+#include <linux/in.h>
+#include <linux/in6.h>
+
+struct prefix_info {
+	__u8			type;
+	__u8			length;
+	__u8			prefix_len;
+
+#if defined(__BIG_ENDIAN_BITFIELD)
+	__u8			onlink : 1,
+			 	autoconf : 1,
+				reserved : 6;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+	__u8			reserved : 6,
+				autoconf : 1,
+				onlink : 1;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+	__be32			valid;
+	__be32			prefered;
+	__be32			reserved2;
+
+	struct in6_addr		prefix;
+};
+
+
+#include <linux/netdevice.h>
+#include <net/if_inet6.h>
+#include <net/ipv6.h>
+
+#define IN6_ADDR_HSIZE_SHIFT	4
+#define IN6_ADDR_HSIZE		(1 << IN6_ADDR_HSIZE_SHIFT)
+
+int addrconf_init(void);
+void addrconf_cleanup(void);
+
+int addrconf_add_ifaddr(struct net *net, void __user *arg);
+int addrconf_del_ifaddr(struct net *net, void __user *arg);
+int addrconf_set_dstaddr(struct net *net, void __user *arg);
+
+int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
+		  const struct net_device *dev, int strict);
+int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
+			    const struct net_device *dev, int strict,
+			    u32 banned_flags);
+
+#if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
+int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr);
+#endif
+
+bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
+				   const unsigned int prefix_len,
+				   struct net_device *dev);
+
+int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
+
+struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
+				     const struct in6_addr *addr,
+				     struct net_device *dev, int strict);
+
+int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev,
+		       const struct in6_addr *daddr, unsigned int srcprefs,
+		       struct in6_addr *saddr);
+int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
+		      u32 banned_flags);
+int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
+		    u32 banned_flags);
+int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2);
+void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr);
+void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr);
+
+static inline unsigned long addrconf_timeout_fixup(u32 timeout,
+						   unsigned int unit)
+{
+	if (timeout == 0xffffffff)
+		return ~0UL;
+
+	/*
+	 * Avoid arithmetic overflow.
+	 * Assuming unit is constant and non-zero, this "if" statement
+	 * will go away on 64bit archs.
+	 */
+	if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit)
+		return LONG_MAX / unit;
+
+	return timeout;
+}
+
+static inline int addrconf_finite_timeout(unsigned long timeout)
+{
+	return ~timeout;
+}
+
+/*
+ *	IPv6 Address Label subsystem (addrlabel.c)
+ */
+int ipv6_addr_label_init(void);
+void ipv6_addr_label_cleanup(void);
+void ipv6_addr_label_rtnl_register(void);
+u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr,
+		    int type, int ifindex);
+
+/*
+ *	multicast prototypes (mcast.c)
+ */
+int ipv6_sock_mc_join(struct sock *sk, int ifindex,
+		      const struct in6_addr *addr);
+int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
+		      const struct in6_addr *addr);
+void ipv6_sock_mc_close(struct sock *sk);
+bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
+		    const struct in6_addr *src_addr);
+
+int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr);
+int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr);
+int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr);
+void ipv6_mc_up(struct inet6_dev *idev);
+void ipv6_mc_down(struct inet6_dev *idev);
+void ipv6_mc_unmap(struct inet6_dev *idev);
+void ipv6_mc_remap(struct inet6_dev *idev);
+void ipv6_mc_init_dev(struct inet6_dev *idev);
+void ipv6_mc_destroy_dev(struct inet6_dev *idev);
+void addrconf_dad_failure(struct inet6_ifaddr *ifp);
+
+bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
+			 const struct in6_addr *src_addr);
+
+void ipv6_mc_dad_complete(struct inet6_dev *idev);
+
+/* A stub used by vxlan module. This is ugly, ideally these
+ * symbols should be built into the core kernel.
+ */
+struct ipv6_stub {
+	int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex,
+				 const struct in6_addr *addr);
+	int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex,
+				 const struct in6_addr *addr);
+	int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst,
+				struct flowi6 *fl6);
+	void (*udpv6_encap_enable)(void);
+	void (*ndisc_send_na)(struct net_device *dev, struct neighbour *neigh,
+			      const struct in6_addr *daddr,
+			      const struct in6_addr *solicited_addr,
+			      bool router, bool solicited, bool override, bool inc_opt);
+	struct neigh_table *nd_tbl;
+};
+extern const struct ipv6_stub *ipv6_stub __read_mostly;
+
+/*
+ * identify MLD packets for MLD filter exceptions
+ */
+static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset)
+{
+	struct icmp6hdr *hdr;
+
+	if (nexthdr != IPPROTO_ICMPV6 ||
+	    !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr)))
+		return false;
+
+	hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset);
+
+	switch (hdr->icmp6_type) {
+	case ICMPV6_MGM_QUERY:
+	case ICMPV6_MGM_REPORT:
+	case ICMPV6_MGM_REDUCTION:
+	case ICMPV6_MLD2_REPORT:
+		return true;
+	default:
+		break;
+	}
+	return false;
+}
+
+void addrconf_prefix_rcv(struct net_device *dev,
+			 u8 *opt, int len, bool sllao);
+
+/*
+ *	anycast prototypes (anycast.c)
+ */
+int ipv6_sock_ac_join(struct sock *sk, int ifindex,
+		      const struct in6_addr *addr);
+int ipv6_sock_ac_drop(struct sock *sk, int ifindex,
+		      const struct in6_addr *addr);
+void ipv6_sock_ac_close(struct sock *sk);
+
+int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr);
+int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr);
+void ipv6_ac_destroy_dev(struct inet6_dev *idev);
+bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev,
+			 const struct in6_addr *addr);
+bool ipv6_chk_acast_addr_src(struct net *net, struct net_device *dev,
+			     const struct in6_addr *addr);
+
+/* Device notifier */
+int register_inet6addr_notifier(struct notifier_block *nb);
+int unregister_inet6addr_notifier(struct notifier_block *nb);
+int inet6addr_notifier_call_chain(unsigned long val, void *v);
+
+void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
+				  struct ipv6_devconf *devconf);
+
+/**
+ * __in6_dev_get - get inet6_dev pointer from netdevice
+ * @dev: network device
+ *
+ * Caller must hold rcu_read_lock or RTNL, because this function
+ * does not take a reference on the inet6_dev.
+ */
+static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
+{
+	return rcu_dereference_rtnl(dev->ip6_ptr);
+}
+
+/**
+ * in6_dev_get - get inet6_dev pointer from netdevice
+ * @dev: network device
+ *
+ * This version can be used in any context, and takes a reference
+ * on the inet6_dev. Callers must use in6_dev_put() later to
+ * release this reference.
+ */
+static inline struct inet6_dev *in6_dev_get(const struct net_device *dev)
+{
+	struct inet6_dev *idev;
+
+	rcu_read_lock();
+	idev = rcu_dereference(dev->ip6_ptr);
+	if (idev)
+		atomic_inc(&idev->refcnt);
+	rcu_read_unlock();
+	return idev;
+}
+
+static inline struct neigh_parms *__in6_dev_nd_parms_get_rcu(const struct net_device *dev)
+{
+	struct inet6_dev *idev = __in6_dev_get(dev);
+
+	return idev ? idev->nd_parms : NULL;
+}
+
+void in6_dev_finish_destroy(struct inet6_dev *idev);
+
+static inline void in6_dev_put(struct inet6_dev *idev)
+{
+	if (atomic_dec_and_test(&idev->refcnt))
+		in6_dev_finish_destroy(idev);
+}
+
+static inline void __in6_dev_put(struct inet6_dev *idev)
+{
+	atomic_dec(&idev->refcnt);
+}
+
+static inline void in6_dev_hold(struct inet6_dev *idev)
+{
+	atomic_inc(&idev->refcnt);
+}
+
+void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp);
+
+static inline void in6_ifa_put(struct inet6_ifaddr *ifp)
+{
+	if (atomic_dec_and_test(&ifp->refcnt))
+		inet6_ifa_finish_destroy(ifp);
+}
+
+static inline void __in6_ifa_put(struct inet6_ifaddr *ifp)
+{
+	atomic_dec(&ifp->refcnt);
+}
+
+static inline void in6_ifa_hold(struct inet6_ifaddr *ifp)
+{
+	atomic_inc(&ifp->refcnt);
+}
+
+
+/*
+ *	compute link-local solicited-node multicast address
+ */
+
+static inline void addrconf_addr_solict_mult(const struct in6_addr *addr,
+					     struct in6_addr *solicited)
+{
+	ipv6_addr_set(solicited,
+		      htonl(0xFF020000), 0,
+		      htonl(0x1),
+		      htonl(0xFF000000) | addr->s6_addr32[3]);
+}
+
+static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr)
+{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+	__be64 *p = (__be64 *)addr;
+	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL;
+#else
+	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
+		addr->s6_addr32[1] | addr->s6_addr32[2] |
+		(addr->s6_addr32[3] ^ htonl(0x00000001))) == 0;
+#endif
+}
+
+static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr)
+{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+	__be64 *p = (__be64 *)addr;
+	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL;
+#else
+	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
+		addr->s6_addr32[1] | addr->s6_addr32[2] |
+		(addr->s6_addr32[3] ^ htonl(0x00000002))) == 0;
+#endif
+}
+
+static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
+{
+	return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
+}
+
+static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
+{
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+	__be64 *p = (__be64 *)addr;
+	return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
+		((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
+		 cpu_to_be64(0xffffffffff000000UL))) == 0UL;
+#else
+	return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
+		addr->s6_addr32[1] |
+		(addr->s6_addr32[2] ^ htonl(0x00000001)) |
+		(addr->s6_addr[12] ^ 0xff)) == 0;
+#endif
+}
+
+#ifdef CONFIG_PROC_FS
+int if6_proc_init(void);
+void if6_proc_exit(void);
+#endif
+
+#endif