#ifndef _NDISC_H#define _NDISC_H /* * ICMP codes for neighbour discovery messages */ #define NDISC_ROUTER_SOLICITATION 133#define NDISC_ROUTER_ADVERTISEMENT 134#define NDISC_NEIGHBOUR_SOLICITATION 135#define NDISC_NEIGHBOUR_ADVERTISEMENT 136#define NDISC_REDIRECT 137 /* * Router type: cross-layer information from link-layer to * IPv6 layer reported by certain link types (e.g., RFC4214). */#define NDISC_NODETYPE_UNSPEC 0 /* unspecified (default) */#define NDISC_NODETYPE_HOST 1 /* host or unauthorized router */#define NDISC_NODETYPE_NODEFAULT 2 /* non-default router */#define NDISC_NODETYPE_DEFAULT 3 /* default router */ /* * ndisc options */ enum { __ND_OPT_PREFIX_INFO_END = 0, ND_OPT_SOURCE_LL_ADDR = 1, /* RFC2461 */ ND_OPT_TARGET_LL_ADDR = 2, /* RFC2461 */ ND_OPT_PREFIX_INFO = 3, /* RFC2461 */ ND_OPT_REDIRECT_HDR = 4, /* RFC2461 */ ND_OPT_MTU = 5, /* RFC2461 */ __ND_OPT_ARRAY_MAX, ND_OPT_ROUTE_INFO = 24, /* RFC4191 */ ND_OPT_RDNSS = 25, /* RFC5006 */ ND_OPT_DNSSL = 31, /* RFC6106 */ __ND_OPT_MAX}; #define MAX_RTR_SOLICITATION_DELAY HZ #define ND_REACHABLE_TIME (30*HZ)#define ND_RETRANS_TIMER HZ #include <linux/compiler.h>#include <linux/icmpv6.h>#include <linux/in6.h>#include <linux/types.h> #include <net/neighbour.h> struct ctl_table;struct inet6_dev;struct net_device;struct net_proto_family;struct sk_buff; extern struct neigh_table nd_tbl; struct nd_msg { struct icmp6hdr icmph; struct in6_addr target; __u8 opt[0];}; struct rs_msg { struct icmp6hdr icmph; __u8 opt[0];}; struct ra_msg { struct icmp6hdr icmph; __be32 reachable_time; __be32 retrans_timer;}; struct nd_opt_hdr { __u8 nd_opt_type; __u8 nd_opt_len;} __packed; static inline u32 ndisc_hashfn(const void *pkey, const struct net_device *dev, __u32 *hash_rnd){ const u32 *p32 = pkey; return (((p32[0] ^ dev->ifindex) * hash_rnd[0]) + (p32[1] * hash_rnd[1]) + (p32[2] * hash_rnd[2]) + (p32[3] * hash_rnd[3]));} static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const void *pkey){ struct neigh_hash_table *nht; const u32 *p32 = pkey; struct neighbour *n; u32 hash_val; rcu_read_lock_bh(); nht = rcu_dereference_bh(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) { if (!atomic_inc_not_zero(&n->refcnt)) n = NULL; break; } } rcu_read_unlock_bh(); return n;} extern int ndisc_init(void); extern void ndisc_cleanup(void); extern int ndisc_rcv(struct sk_buff *skb); 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); extern void ndisc_send_rs(struct net_device *dev, const struct in6_addr *saddr, const struct in6_addr *daddr); extern void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target); extern int ndisc_mc_map(const struct in6_addr *addr, char *buf, struct net_device *dev, int dir); 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); 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); /* * IGMP */extern int igmp6_init(void); extern void igmp6_cleanup(void); extern int igmp6_event_query(struct sk_buff *skb); extern int igmp6_event_report(struct sk_buff *skb); #ifdef CONFIG_SYSCTLextern 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, 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); #endif
#ifndef _NDISC_H
#define _NDISC_H
/*
* ICMP codes for neighbour discovery messages
*/
#define NDISC_ROUTER_SOLICITATION 133
#define NDISC_ROUTER_ADVERTISEMENT 134
#define NDISC_NEIGHBOUR_SOLICITATION 135
#define NDISC_NEIGHBOUR_ADVERTISEMENT 136
#define NDISC_REDIRECT 137
/*
* Router type: cross-layer information from link-layer to
* IPv6 layer reported by certain link types (e.g., RFC4214).
*/
#define NDISC_NODETYPE_UNSPEC 0 /* unspecified (default) */
#define NDISC_NODETYPE_HOST 1 /* host or unauthorized router */
#define NDISC_NODETYPE_NODEFAULT 2 /* non-default router */
#define NDISC_NODETYPE_DEFAULT 3 /* default router */
/*
* ndisc options
*/
enum {
__ND_OPT_PREFIX_INFO_END = 0,
ND_OPT_SOURCE_LL_ADDR = 1, /* RFC2461 */
ND_OPT_TARGET_LL_ADDR = 2, /* RFC2461 */
ND_OPT_PREFIX_INFO = 3, /* RFC2461 */
ND_OPT_REDIRECT_HDR = 4, /* RFC2461 */
ND_OPT_MTU = 5, /* RFC2461 */
__ND_OPT_ARRAY_MAX,
ND_OPT_ROUTE_INFO = 24, /* RFC4191 */
ND_OPT_RDNSS = 25, /* RFC5006 */
ND_OPT_DNSSL = 31, /* RFC6106 */
__ND_OPT_MAX
};
#define MAX_RTR_SOLICITATION_DELAY HZ
#define ND_REACHABLE_TIME (30*HZ)
#define ND_RETRANS_TIMER HZ
#include <linux/compiler.h>
#include <linux/icmpv6.h>
#include <linux/in6.h>
#include <linux/types.h>
#include <net/neighbour.h>
struct ctl_table;
struct inet6_dev;
struct net_device;
struct net_proto_family;
struct sk_buff;
extern struct neigh_table nd_tbl;
struct nd_msg {
struct icmp6hdr icmph;
struct in6_addr target;
__u8 opt[0];
};
struct rs_msg {
struct icmp6hdr icmph;
__u8 opt[0];
};
struct ra_msg {
struct icmp6hdr icmph;
__be32 reachable_time;
__be32 retrans_timer;
};
struct nd_opt_hdr {
__u8 nd_opt_type;
__u8 nd_opt_len;
} __packed;
static inline u32 ndisc_hashfn(const void *pkey, const struct net_device *dev, __u32 *hash_rnd)
{
const u32 *p32 = pkey;
return (((p32[0] ^ dev->ifindex) * hash_rnd[0]) +
(p32[1] * hash_rnd[1]) +
(p32[2] * hash_rnd[2]) +
(p32[3] * hash_rnd[3]));
}
static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const void *pkey)
{
struct neigh_hash_table *nht;
const u32 *p32 = pkey;
struct neighbour *n;
u32 hash_val;
rcu_read_lock_bh();
nht = rcu_dereference_bh(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) {
if (!atomic_inc_not_zero(&n->refcnt))
n = NULL;
break;
}
}
rcu_read_unlock_bh();
return n;
}
extern int ndisc_init(void);
extern void ndisc_cleanup(void);
extern int ndisc_rcv(struct sk_buff *skb);
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);
extern void ndisc_send_rs(struct net_device *dev,
const struct in6_addr *saddr,
const struct in6_addr *daddr);
extern void ndisc_send_redirect(struct sk_buff *skb,
const struct in6_addr *target);
extern int ndisc_mc_map(const struct in6_addr *addr, char *buf,
struct net_device *dev, int dir);
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);
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);
/*
* IGMP
*/
extern int igmp6_init(void);
extern void igmp6_cleanup(void);
extern int igmp6_event_query(struct sk_buff *skb);
extern 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,
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);
#endif