src/ap/steering.h

/*
 * hostapd / Interface steering
 * Copyright (c) 2015 Google, Inc.
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#ifndef STEERING_H
#define STEERING_H

#define MAX_STEERING_TIMESTAMP_FILES 100
/* 10 seconds is long enough to scan all channels on both bands at least twice
 * at 100ms/channel.
 */
#define BANDSTEERING_DELAY_SECONDS 10
#define BANDSTEERING_EXPIRATION_SECONDS 120

extern char *steering_timestamp_path;

struct hostapd_data;
struct ieee80211_mgmt;
struct os_reltime;
struct dirent;

/**
 * Writes timestamp for the interface specified by hw_mode and the source
 * address in mgmt.  Returns 1 iff the write succeeded.
 */
int write_timestamp_file(const struct ieee80211_mgmt *mgmt,
                         const struct hostapd_data *hapd,
                         const struct os_reltime timestamp);

/**
 * Reads a timestamp for the interface specified by hw_mode and the source
 * address in mgmt, putting the result in timestamp.  Returns 1 iff the read
 * succeeded.
 */
int read_timestamp_file(const struct ieee80211_mgmt *mgmt,
                        const struct hostapd_data *hapd,
                        struct os_reltime *timestamp);

/**
 * Delete all but the most recent MAX_TIMESTAMP_FILES files in
 * steering_timestamp_path.  Returns the number of files deleted.
 */
int garbage_collect_timestamp_files();

#endif /* STEERING_H */