mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 17:51:53 +00:00
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/*
|
|
* BIRD Internet Routing Daemon -- Semi-global index of nets
|
|
*
|
|
* (c) 2023 Maria Matejka <mq@jmq.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_LIB_NETINDEX_H_
|
|
#define _BIRD_LIB_NETINDEX_H_
|
|
|
|
#include "lib/bitmap.h"
|
|
#include "lib/hash.h"
|
|
#include "lib/lockfree.h"
|
|
#include "lib/net.h"
|
|
#include "lib/resource.h"
|
|
|
|
/* Index object */
|
|
struct netindex {
|
|
struct netindex *next; /* Next in hash chain */
|
|
u32 hash; /* Cached hash value */
|
|
u32 index; /* Assigned index */
|
|
struct lfuc uc; /* Atomic usecount */
|
|
net_addr addr[0]; /* The net itself (one) */
|
|
};
|
|
|
|
/* Index hash: data structure completely opaque, use handlers */
|
|
typedef union netindex_hash netindex_hash;
|
|
|
|
/* Initialization and teardown */
|
|
netindex_hash *netindex_hash_new(pool *, event_list *);
|
|
void netindex_hash_delete(netindex_hash *, event *, event_list *);
|
|
|
|
/* Find/get/resolve index; pointer valid until end of task */
|
|
struct netindex *net_find_index(netindex_hash *, const net_addr *);
|
|
struct netindex *net_get_index(netindex_hash *, const net_addr *);
|
|
struct netindex *net_resolve_index(netindex_hash *, u8, u32);
|
|
|
|
/* Update use-count without allocating a handle. Take same care
|
|
* to ensure that your locks and unlocks are always balanced. */
|
|
void net_lock_index(netindex_hash *h, struct netindex *i);
|
|
void net_unlock_index(netindex_hash *h, struct netindex *i);
|
|
|
|
/* Retrieve the index from its addr pointer */
|
|
#define NET_TO_INDEX(a) \
|
|
SKIP_BACK(struct netindex, addr, TYPE_CAST(net_addr *, net_addr (*)[0], a))
|
|
|
|
#endif //_BIRD_LIB_NETINDEX_H_
|