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/* Copyright (c) 2012-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file replaycache.h
* \brief Header file for replaycache.c.
**/
#ifndef TOR_REPLAYCACHE_H
#define TOR_REPLAYCACHE_H
typedef struct replaycache_t replaycache_t;
#ifdef REPLAYCACHE_PRIVATE
struct replaycache_t {
/** Scrub interval */
time_t scrub_interval;
/** Last scrubbed */
time_t scrubbed;
/**
* Horizon
* (don't return true on digests in the cache but older than this)
*/
time_t horizon;
/**
* Digest map: keys are digests, values are times the digest was last seen
*/
digest256map_t *digests_seen;
};
#endif /* defined(REPLAYCACHE_PRIVATE) */
/* replaycache_t free/new */
void replaycache_free_(replaycache_t *r);
/**
* @copydoc replaycache_free_
*
* Additionally, set the pointer <b>r</b> to NULL.
**/
#define replaycache_free(r) \
FREE_AND_NULL(replaycache_t, replaycache_free_, (r))
replaycache_t * replaycache_new(time_t horizon, time_t interval);
#ifdef REPLAYCACHE_PRIVATE
/*
* replaycache_t internal functions:
*
* These take the time to treat as the present as an argument for easy unit
* testing. For everything else, use the wrappers below instead.
*/
STATIC int replaycache_add_and_test_internal(
time_t present, replaycache_t *r, const void *data, size_t len,
time_t *elapsed);
STATIC void replaycache_scrub_if_needed_internal(
time_t present, replaycache_t *r);
#endif /* defined(REPLAYCACHE_PRIVATE) */
/*
* replaycache_t methods
*/
int replaycache_add_and_test(replaycache_t *r, const void *data, size_t len);
int replaycache_add_test_and_elapsed(
replaycache_t *r, const void *data, size_t len, time_t *elapsed);
void replaycache_scrub_if_needed(replaycache_t *r);
#endif /* !defined(TOR_REPLAYCACHE_H) */
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