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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
*/
#ifndef __LEASE_H__
#define __LEASE_H__
#include <stdint.h>
#include <sys/socket.h>
#include <time.h>
#include "common.h"
#include "netlink.h"
struct wg_dynamic_lease {
time_t start_real;
time_t start_mono;
uint32_t leasetime; /* in seconds */
struct in_addr ipv4;
struct in6_addr ipv6;
struct wg_dynamic_lease *next;
};
/*
* Initializes internal state, reads leases from fname.
*/
void leases_init(char *fname);
/*
* Frees everything, closes file.
*/
void leases_free();
/*
* Creates a new lease and returns a pointer to it, or NULL if either we ran out
* of assignable IPs or the requested IP is already taken.
* expires contains the (monotonic) timestamp after which the next lease,
* possibly the newly created one, will expire.
*/
struct wg_dynamic_lease *new_lease(wg_key pubkey, uint32_t leasetime,
struct in_addr *ipv4, struct in6_addr *ipv6,
time_t *expires);
/*
* Returns all leases belonging to pubkey, or NULL if there are none.
*/
struct wg_dynamic_lease *get_leases(wg_key pubkey);
/*
* Extend the lease to be leasetime long again. Returns true on error, or false
* otherwise. expires behaves exactly as in new_lease().
*/
bool extend_lease(struct wg_dynamic_lease *lease, uint32_t leasetime,
time_t *expires);
/*
* Refreshes all leases, meaning expired ones will be removed. Returns the
* expiration timestamp of the lease that will expire next.
*/
time_t leases_refresh();
/*
* Updates all pools with information from the netlink file descriptor fd.
*/
void leases_update_pools(int fd);
#endif
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