163 lines
3.5 KiB
C
163 lines
3.5 KiB
C
/*
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* WPA Supplicant - auto scan
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* Copyright (c) 2012, Intel Corporation. All rights reserved.
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* Copyright 2015 Intel Deutschland GmbH
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "config.h"
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#include "wpa_supplicant_i.h"
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#include "bss.h"
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#include "scan.h"
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#include "autoscan.h"
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static const struct autoscan_ops * autoscan_modules[] = {
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#ifdef CONFIG_AUTOSCAN_EXPONENTIAL
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&autoscan_exponential_ops,
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#endif /* CONFIG_AUTOSCAN_EXPONENTIAL */
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#ifdef CONFIG_AUTOSCAN_PERIODIC
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&autoscan_periodic_ops,
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#endif /* CONFIG_AUTOSCAN_PERIODIC */
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NULL
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};
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static void request_scan(struct wpa_supplicant *wpa_s)
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{
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wpa_s->scan_req = MANUAL_SCAN_REQ;
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if (wpa_supplicant_req_sched_scan(wpa_s))
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wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 0);
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}
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int autoscan_init(struct wpa_supplicant *wpa_s, int req_scan)
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{
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const char *name = wpa_s->conf->autoscan;
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const char *params;
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size_t nlen;
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int i;
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const struct autoscan_ops *ops = NULL;
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struct sched_scan_plan *scan_plans;
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/* Give preference to scheduled scan plans if supported/configured */
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if (wpa_s->sched_scan_plans) {
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wpa_printf(MSG_DEBUG,
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"autoscan: sched_scan_plans set - use it instead");
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return 0;
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}
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if (wpa_s->autoscan && wpa_s->autoscan_priv) {
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wpa_printf(MSG_DEBUG, "autoscan: Already initialized");
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return 0;
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}
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if (name == NULL)
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return 0;
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params = os_strchr(name, ':');
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if (params == NULL) {
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params = "";
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nlen = os_strlen(name);
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} else {
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nlen = params - name;
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params++;
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}
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for (i = 0; autoscan_modules[i]; i++) {
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if (os_strncmp(name, autoscan_modules[i]->name, nlen) == 0) {
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ops = autoscan_modules[i];
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break;
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}
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}
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if (ops == NULL) {
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wpa_printf(MSG_ERROR, "autoscan: Could not find module "
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"matching the parameter '%s'", name);
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return -1;
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}
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scan_plans = os_malloc(sizeof(*wpa_s->sched_scan_plans));
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if (!scan_plans)
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return -1;
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wpa_s->autoscan_params = NULL;
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wpa_s->autoscan_priv = ops->init(wpa_s, params);
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if (!wpa_s->autoscan_priv) {
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os_free(scan_plans);
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return -1;
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}
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scan_plans[0].interval = 5;
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scan_plans[0].iterations = 0;
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os_free(wpa_s->sched_scan_plans);
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wpa_s->sched_scan_plans = scan_plans;
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wpa_s->sched_scan_plans_num = 1;
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wpa_s->autoscan = ops;
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wpa_printf(MSG_DEBUG, "autoscan: Initialized module '%s' with "
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"parameters '%s'", ops->name, params);
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if (!req_scan)
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return 0;
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/*
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* Cancelling existing scan requests, if any.
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*/
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wpa_supplicant_cancel_sched_scan(wpa_s);
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wpa_supplicant_cancel_scan(wpa_s);
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/*
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* Firing first scan, which will lead to call autoscan_notify_scan.
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*/
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request_scan(wpa_s);
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return 0;
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}
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void autoscan_deinit(struct wpa_supplicant *wpa_s)
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{
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if (wpa_s->autoscan && wpa_s->autoscan_priv) {
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wpa_printf(MSG_DEBUG, "autoscan: Deinitializing module '%s'",
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wpa_s->autoscan->name);
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wpa_s->autoscan->deinit(wpa_s->autoscan_priv);
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wpa_s->autoscan = NULL;
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wpa_s->autoscan_priv = NULL;
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wpa_s->scan_interval = 5;
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os_free(wpa_s->sched_scan_plans);
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wpa_s->sched_scan_plans = NULL;
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wpa_s->sched_scan_plans_num = 0;
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}
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}
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int autoscan_notify_scan(struct wpa_supplicant *wpa_s,
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struct wpa_scan_results *scan_res)
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{
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int interval;
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if (wpa_s->autoscan && wpa_s->autoscan_priv) {
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interval = wpa_s->autoscan->notify_scan(wpa_s->autoscan_priv,
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scan_res);
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if (interval <= 0)
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return -1;
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wpa_s->scan_interval = interval;
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wpa_s->sched_scan_plans[0].interval = interval;
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request_scan(wpa_s);
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}
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return 0;
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}
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