hostap/wpa_supplicant/autoscan.c
Jouni Malinen 9d3f4a74b6 autoscan: Add more debug prints for cases where autoscan is not used
This makes it easier to figure out why autoscan is not used even when
being configured through the control interface.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-03 11:34:35 +03:00

162 lines
3.5 KiB
C

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