diff options
Diffstat (limited to 'pfinet/linux-src/include/net/neighbour.h')
| -rw-r--r-- | pfinet/linux-src/include/net/neighbour.h | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/pfinet/linux-src/include/net/neighbour.h b/pfinet/linux-src/include/net/neighbour.h new file mode 100644 index 00000000..5c5d90bb --- /dev/null +++ b/pfinet/linux-src/include/net/neighbour.h @@ -0,0 +1,272 @@ +#ifndef _NET_NEIGHBOUR_H +#define _NET_NEIGHBOUR_H + +/* + * Generic neighbour manipulation + * + * Authors: + * Pedro Roque <roque@di.fc.ul.pt> + * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> + */ + +/* The following flags & states are exported to user space, + so that they should be moved to include/linux/ directory. + */ + +/* + * Neighbor Cache Entry Flags + */ + +#define NTF_PROXY 0x08 /* == ATF_PUBL */ +#define NTF_ROUTER 0x80 + +/* + * Neighbor Cache Entry States. + */ + +#define NUD_INCOMPLETE 0x01 +#define NUD_REACHABLE 0x02 +#define NUD_STALE 0x04 +#define NUD_DELAY 0x08 +#define NUD_PROBE 0x10 +#define NUD_FAILED 0x20 + +/* Dummy states */ +#define NUD_NOARP 0x40 +#define NUD_PERMANENT 0x80 +#define NUD_NONE 0x00 + +/* NUD_NOARP & NUD_PERMANENT are pseudostates, they never change + and make no address resolution or NUD. + NUD_PERMANENT is also cannot be deleted by garbage collectors. + */ + +#ifdef __KERNEL__ + +#include <asm/atomic.h> +#include <linux/skbuff.h> + +#define NUD_IN_TIMER (NUD_INCOMPLETE|NUD_DELAY|NUD_PROBE) +#define NUD_VALID (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY) +#define NUD_CONNECTED (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE) + +struct neigh_parms +{ + struct neigh_parms *next; + int (*neigh_setup)(struct neighbour *); + struct neigh_table *tbl; + int entries; + void *priv; + + void *sysctl_table; + + int base_reachable_time; + int retrans_time; + int gc_staletime; + int reachable_time; + int delay_probe_time; + + int queue_len; + int ucast_probes; + int app_probes; + int mcast_probes; + int anycast_delay; + int proxy_delay; + int proxy_qlen; + int locktime; +}; + +struct neigh_statistics +{ + unsigned long allocs; + unsigned long res_failed; + unsigned long rcv_probes_mcast; + unsigned long rcv_probes_ucast; +}; + +struct neighbour +{ + struct neighbour *next; + struct neigh_table *tbl; + struct neigh_parms *parms; + struct device *dev; + unsigned long used; + unsigned long confirmed; + unsigned long updated; + __u8 flags; + __u8 nud_state; + __u8 type; + __u8 probes; + unsigned char ha[MAX_ADDR_LEN]; + struct hh_cache *hh; + atomic_t refcnt; + int (*output)(struct sk_buff *skb); + struct sk_buff_head arp_queue; + struct timer_list timer; + struct neigh_ops *ops; + u8 primary_key[0]; +}; + +struct neigh_ops +{ + int family; + void (*destructor)(struct neighbour *); + void (*solicit)(struct neighbour *, struct sk_buff*); + void (*error_report)(struct neighbour *, struct sk_buff*); + int (*output)(struct sk_buff*); + int (*connected_output)(struct sk_buff*); + int (*hh_output)(struct sk_buff*); + int (*queue_xmit)(struct sk_buff*); +}; + +struct pneigh_entry +{ + struct pneigh_entry *next; + struct device *dev; + u8 key[0]; +}; + +#define NEIGH_HASHMASK 0x1F +#define PNEIGH_HASHMASK 0xF + +/* + * neighbour table manipulation + */ + + +struct neigh_table +{ + struct neigh_table *next; + int family; + int entry_size; + int key_len; + int (*constructor)(struct neighbour *); + int (*pconstructor)(struct pneigh_entry *); + void (*pdestructor)(struct pneigh_entry *); + void (*proxy_redo)(struct sk_buff *skb); + struct neigh_parms parms; + /* HACK. gc_* shoul follow parms without a gap! */ + int gc_interval; + int gc_thresh1; + int gc_thresh2; + int gc_thresh3; + unsigned long last_flush; + struct timer_list gc_timer; + struct timer_list proxy_timer; + struct sk_buff_head proxy_queue; + int entries; + atomic_t lock; + unsigned long last_rand; + struct neigh_parms *parms_list; + struct neigh_statistics stats; + struct neighbour *hash_buckets[NEIGH_HASHMASK+1]; + struct pneigh_entry *phash_buckets[PNEIGH_HASHMASK+1]; +}; + +extern void neigh_table_init(struct neigh_table *tbl); +extern int neigh_table_clear(struct neigh_table *tbl); +extern struct neighbour *__neigh_lookup(struct neigh_table *tbl, + const void *pkey, struct device *dev, + int creat); +extern void neigh_destroy(struct neighbour *neigh); +extern int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb); +extern int neigh_update(struct neighbour *neigh, u8 *lladdr, u8 new, int override, int arp); +extern int neigh_ifdown(struct neigh_table *tbl, struct device *dev); +extern int neigh_resolve_output(struct sk_buff *skb); +extern int neigh_connected_output(struct sk_buff *skb); +extern int neigh_compat_output(struct sk_buff *skb); +extern struct neighbour *neigh_event_ns(struct neigh_table *tbl, + u8 *lladdr, void *saddr, + struct device *dev); + +extern struct neigh_parms *neigh_parms_alloc(struct device *dev, struct neigh_table *tbl); +extern void neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms); +extern unsigned long neigh_rand_reach_time(unsigned long base); + +extern void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p, + struct sk_buff *skb); +extern struct pneigh_entry *pneigh_lookup(struct neigh_table *tbl, const void *key, struct device *dev, int creat); +extern int pneigh_delete(struct neigh_table *tbl, const void *key, struct device *dev); + +struct netlink_callback; +struct nlmsghdr; +extern int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb); +extern int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg); +extern int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg); +extern void neigh_app_ns(struct neighbour *n); + +extern int neigh_sysctl_register(struct device *dev, struct neigh_parms *p, + int p_id, int pdev_id, char *p_name); +extern void neigh_sysctl_unregister(struct neigh_parms *p); + +/* + * Neighbour references + * + * When neighbour pointers are passed to "client" code the + * reference count is increased. The count is 0 if the node + * is only referenced by the corresponding table. + */ + +extern __inline__ void neigh_release(struct neighbour *neigh) +{ + if (atomic_dec_and_test(&neigh->refcnt) && neigh->tbl == NULL) + neigh_destroy(neigh); +} + +extern __inline__ struct neighbour * neigh_clone(struct neighbour *neigh) +{ + if (neigh) + atomic_inc(&neigh->refcnt); + return neigh; +} + +extern __inline__ void neigh_confirm(struct neighbour *neigh) +{ + if (neigh) + neigh->confirmed = jiffies; +} + +extern __inline__ struct neighbour * +neigh_lookup(struct neigh_table *tbl, const void *pkey, struct device *dev) +{ + struct neighbour *neigh; + start_bh_atomic(); + neigh = __neigh_lookup(tbl, pkey, dev, 0); + end_bh_atomic(); + return neigh; +} + +extern __inline__ int neigh_is_connected(struct neighbour *neigh) +{ + return neigh->nud_state&NUD_CONNECTED; +} + +extern __inline__ int neigh_is_valid(struct neighbour *neigh) +{ + return neigh->nud_state&NUD_VALID; +} + +extern __inline__ int neigh_event_send(struct neighbour *neigh, struct sk_buff *skb) +{ + neigh->used = jiffies; + if (!(neigh->nud_state&(NUD_CONNECTED|NUD_DELAY|NUD_PROBE))) + return __neigh_event_send(neigh, skb); + return 0; +} + +extern __inline__ void neigh_table_lock(struct neigh_table *tbl) +{ + atomic_inc(&tbl->lock); + synchronize_bh(); +} + +extern __inline__ void neigh_table_unlock(struct neigh_table *tbl) +{ + atomic_dec(&tbl->lock); +} + + +#endif +#endif + + |