e2f74005f5
This allows bgscan modules to use more information to decide on when to perform background scans. bgscan_simple can now change between short and long background scan intervals based on signal strength and in addition, it can trigger immediate scans when the signal strength is detected to be dropping. bgscan_simple takes following parameters now: short interval:signal strength threshold:long interval For example: bgscan="simple:30:-45:300"
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
/*
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* WPA Supplicant - background scan and roaming interface
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* Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING 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 "wpa_supplicant_i.h"
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#include "config_ssid.h"
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#include "bgscan.h"
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#ifdef CONFIG_BGSCAN_SIMPLE
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extern const struct bgscan_ops bgscan_simple_ops;
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#endif /* CONFIG_BGSCAN_SIMPLE */
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static const struct bgscan_ops * bgscan_modules[] = {
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#ifdef CONFIG_BGSCAN_SIMPLE
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&bgscan_simple_ops,
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#endif /* CONFIG_BGSCAN_SIMPLE */
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NULL
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};
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int bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
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{
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const char *name = ssid->bgscan;
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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 bgscan_ops *ops = NULL;
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bgscan_deinit(wpa_s);
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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; bgscan_modules[i]; i++) {
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if (os_strncmp(name, bgscan_modules[i]->name, nlen) == 0) {
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ops = bgscan_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, "bgscan: 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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wpa_s->bgscan_priv = ops->init(wpa_s, params, ssid);
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if (wpa_s->bgscan_priv == NULL)
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return -1;
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wpa_s->bgscan = ops;
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wpa_printf(MSG_DEBUG, "bgscan: Initialized module '%s' with "
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"parameters '%s'", ops->name, params);
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return 0;
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}
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void bgscan_deinit(struct wpa_supplicant *wpa_s)
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{
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if (wpa_s->bgscan && wpa_s->bgscan_priv) {
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wpa_printf(MSG_DEBUG, "bgscan: Deinitializing module '%s'",
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wpa_s->bgscan->name);
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wpa_s->bgscan->deinit(wpa_s->bgscan_priv);
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wpa_s->bgscan = NULL;
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wpa_s->bgscan_priv = NULL;
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}
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}
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int bgscan_notify_scan(struct wpa_supplicant *wpa_s)
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{
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if (wpa_s->bgscan && wpa_s->bgscan_priv)
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return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv);
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return 0;
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}
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void bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s)
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{
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if (wpa_s->bgscan && wpa_s->bgscan_priv)
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wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv);
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}
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void bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above)
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{
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if (wpa_s->bgscan && wpa_s->bgscan_priv)
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wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above);
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}
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