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-rw-r--r--include/net/ndisc.h185
1 files changed, 131 insertions, 54 deletions
diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index e0e594f8e9d..6bbda34d5e5 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -34,6 +34,7 @@ enum {
__ND_OPT_ARRAY_MAX,
ND_OPT_ROUTE_INFO = 24, /* RFC4191 */
ND_OPT_RDNSS = 25, /* RFC5006 */
+ ND_OPT_DNSSL = 31, /* RFC6106 */
__ND_OPT_MAX
};
@@ -42,12 +43,13 @@ enum {
#define ND_REACHABLE_TIME (30*HZ)
#define ND_RETRANS_TIMER HZ
-#ifdef __KERNEL__
-
#include <linux/compiler.h>
#include <linux/icmpv6.h>
#include <linux/in6.h>
#include <linux/types.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/hash.h>
#include <net/neighbour.h>
@@ -76,87 +78,162 @@ struct ra_msg {
__be32 retrans_timer;
};
+struct rd_msg {
+ struct icmp6hdr icmph;
+ struct in6_addr target;
+ struct in6_addr dest;
+ __u8 opt[0];
+};
+
struct nd_opt_hdr {
__u8 nd_opt_type;
__u8 nd_opt_len;
} __packed;
+/* ND options */
+struct ndisc_options {
+ struct nd_opt_hdr *nd_opt_array[__ND_OPT_ARRAY_MAX];
+#ifdef CONFIG_IPV6_ROUTE_INFO
+ struct nd_opt_hdr *nd_opts_ri;
+ struct nd_opt_hdr *nd_opts_ri_end;
+#endif
+ struct nd_opt_hdr *nd_useropts;
+ struct nd_opt_hdr *nd_useropts_end;
+};
-extern int ndisc_init(void);
+#define nd_opts_src_lladdr nd_opt_array[ND_OPT_SOURCE_LL_ADDR]
+#define nd_opts_tgt_lladdr nd_opt_array[ND_OPT_TARGET_LL_ADDR]
+#define nd_opts_pi nd_opt_array[ND_OPT_PREFIX_INFO]
+#define nd_opts_pi_end nd_opt_array[__ND_OPT_PREFIX_INFO_END]
+#define nd_opts_rh nd_opt_array[ND_OPT_REDIRECT_HDR]
+#define nd_opts_mtu nd_opt_array[ND_OPT_MTU]
-extern void ndisc_cleanup(void);
+#define NDISC_OPT_SPACE(len) (((len)+2+7)&~7)
-extern int ndisc_rcv(struct sk_buff *skb);
+struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
+ struct ndisc_options *ndopts);
-extern void ndisc_send_ns(struct net_device *dev,
- struct neighbour *neigh,
- const struct in6_addr *solicit,
- const struct in6_addr *daddr,
- const struct in6_addr *saddr);
+/*
+ * Return the padding between the option length and the start of the
+ * link addr. Currently only IP-over-InfiniBand needs this, although
+ * if RFC 3831 IPv6-over-Fibre Channel is ever implemented it may
+ * also need a pad of 2.
+ */
+static inline int ndisc_addr_option_pad(unsigned short type)
+{
+ switch (type) {
+ case ARPHRD_INFINIBAND: return 2;
+ default: return 0;
+ }
+}
-extern void ndisc_send_rs(struct net_device *dev,
- const struct in6_addr *saddr,
- const struct in6_addr *daddr);
+static inline int ndisc_opt_addr_space(struct net_device *dev)
+{
+ return NDISC_OPT_SPACE(dev->addr_len +
+ ndisc_addr_option_pad(dev->type));
+}
-extern void ndisc_send_redirect(struct sk_buff *skb,
- struct neighbour *neigh,
- const struct in6_addr *target);
+static inline u8 *ndisc_opt_addr_data(struct nd_opt_hdr *p,
+ struct net_device *dev)
+{
+ u8 *lladdr = (u8 *)(p + 1);
+ int lladdrlen = p->nd_opt_len << 3;
+ int prepad = ndisc_addr_option_pad(dev->type);
+ if (lladdrlen != ndisc_opt_addr_space(dev))
+ return NULL;
+ return lladdr + prepad;
+}
-extern int ndisc_mc_map(struct in6_addr *addr, char *buf, struct net_device *dev, int dir);
+static inline u32 ndisc_hashfn(const void *pkey, const struct net_device *dev, __u32 *hash_rnd)
+{
+ const u32 *p32 = pkey;
-extern struct sk_buff *ndisc_build_skb(struct net_device *dev,
- const struct in6_addr *daddr,
- const struct in6_addr *saddr,
- struct icmp6hdr *icmp6h,
- const struct in6_addr *target,
- int llinfo);
+ return (((p32[0] ^ hash32_ptr(dev)) * hash_rnd[0]) +
+ (p32[1] * hash_rnd[1]) +
+ (p32[2] * hash_rnd[2]) +
+ (p32[3] * hash_rnd[3]));
+}
-extern void ndisc_send_skb(struct sk_buff *skb,
- struct net_device *dev,
- struct neighbour *neigh,
- const struct in6_addr *daddr,
- const struct in6_addr *saddr,
- struct icmp6hdr *icmp6h);
+static inline struct neighbour *__ipv6_neigh_lookup_noref(struct net_device *dev, const void *pkey)
+{
+ struct neigh_hash_table *nht;
+ const u32 *p32 = pkey;
+ struct neighbour *n;
+ u32 hash_val;
+
+ nht = rcu_dereference_bh(nd_tbl.nht);
+ hash_val = ndisc_hashfn(pkey, dev, nht->hash_rnd) >> (32 - nht->hash_shift);
+ for (n = rcu_dereference_bh(nht->hash_buckets[hash_val]);
+ n != NULL;
+ n = rcu_dereference_bh(n->next)) {
+ u32 *n32 = (u32 *) n->primary_key;
+ if (n->dev == dev &&
+ ((n32[0] ^ p32[0]) | (n32[1] ^ p32[1]) |
+ (n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0)
+ return n;
+ }
+
+ return NULL;
+}
+static inline struct neighbour *__ipv6_neigh_lookup(struct net_device *dev, const void *pkey)
+{
+ struct neighbour *n;
+
+ rcu_read_lock_bh();
+ n = __ipv6_neigh_lookup_noref(dev, pkey);
+ if (n && !atomic_inc_not_zero(&n->refcnt))
+ n = NULL;
+ rcu_read_unlock_bh();
+
+ return n;
+}
+
+int ndisc_init(void);
+int ndisc_late_init(void);
+
+void ndisc_late_cleanup(void);
+void ndisc_cleanup(void);
+
+int ndisc_rcv(struct sk_buff *skb);
+
+void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
+ const struct in6_addr *solicit,
+ const struct in6_addr *daddr, const struct in6_addr *saddr);
+
+void ndisc_send_rs(struct net_device *dev,
+ const struct in6_addr *saddr, const struct in6_addr *daddr);
+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);
+
+void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target);
+
+int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev,
+ int dir);
/*
* IGMP
*/
-extern int igmp6_init(void);
+int igmp6_init(void);
-extern void igmp6_cleanup(void);
+void igmp6_cleanup(void);
-extern int igmp6_event_query(struct sk_buff *skb);
+int igmp6_event_query(struct sk_buff *skb);
-extern int igmp6_event_report(struct sk_buff *skb);
+int igmp6_event_report(struct sk_buff *skb);
#ifdef CONFIG_SYSCTL
-extern int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl,
- int write,
- void __user *buffer,
- size_t *lenp,
- loff_t *ppos);
-int ndisc_ifinfo_sysctl_strategy(ctl_table *ctl,
+int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos);
+int ndisc_ifinfo_sysctl_strategy(struct ctl_table *ctl,
void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen);
#endif
-extern void inet6_ifinfo_notify(int event,
- struct inet6_dev *idev);
-
-static inline struct neighbour * ndisc_get_neigh(struct net_device *dev, const struct in6_addr *addr)
-{
-
- if (dev)
- return __neigh_lookup_errno(&nd_tbl, addr, dev);
-
- return ERR_PTR(-ENODEV);
-}
-
-
-#endif /* __KERNEL__ */
-
+void inet6_ifinfo_notify(int event, struct inet6_dev *idev);
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 18:25:56 +0000