1/*
2 * WPA Supplicant - background scan and roaming interface
3 * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9#include "includes.h"
10
11#include "common.h"
12#include "wpa_supplicant_i.h"
13#include "config_ssid.h"
14#include "bgscan.h"
15
16#ifdef CONFIG_BGSCAN_SIMPLE
17extern const struct bgscan_ops bgscan_simple_ops;
18#endif /* CONFIG_BGSCAN_SIMPLE */
19#ifdef CONFIG_BGSCAN_LEARN
20extern const struct bgscan_ops bgscan_learn_ops;
21#endif /* CONFIG_BGSCAN_LEARN */
22
23static const struct bgscan_ops * bgscan_modules[] = {
24#ifdef CONFIG_BGSCAN_SIMPLE
25	&bgscan_simple_ops,
26#endif /* CONFIG_BGSCAN_SIMPLE */
27#ifdef CONFIG_BGSCAN_LEARN
28	&bgscan_learn_ops,
29#endif /* CONFIG_BGSCAN_LEARN */
30	NULL
31};
32
33
34int bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
35		const char *name)
36{
37	const char *params;
38	size_t nlen;
39	int i;
40	const struct bgscan_ops *ops = NULL;
41
42	bgscan_deinit(wpa_s);
43	if (name == NULL)
44		return -1;
45
46	params = os_strchr(name, ':');
47	if (params == NULL) {
48		params = "";
49		nlen = os_strlen(name);
50	} else {
51		nlen = params - name;
52		params++;
53	}
54
55	for (i = 0; bgscan_modules[i]; i++) {
56		if (os_strncmp(name, bgscan_modules[i]->name, nlen) == 0) {
57			ops = bgscan_modules[i];
58			break;
59		}
60	}
61
62	if (ops == NULL) {
63		wpa_printf(MSG_ERROR, "bgscan: Could not find module "
64			   "matching the parameter '%s'", name);
65		return -1;
66	}
67
68	wpa_s->bgscan_priv = ops->init(wpa_s, params, ssid);
69	if (wpa_s->bgscan_priv == NULL)
70		return -1;
71	wpa_s->bgscan = ops;
72	wpa_printf(MSG_DEBUG, "bgscan: Initialized module '%s' with "
73		   "parameters '%s'", ops->name, params);
74
75	return 0;
76}
77
78
79void bgscan_deinit(struct wpa_supplicant *wpa_s)
80{
81	if (wpa_s->bgscan && wpa_s->bgscan_priv) {
82		wpa_printf(MSG_DEBUG, "bgscan: Deinitializing module '%s'",
83			   wpa_s->bgscan->name);
84		wpa_s->bgscan->deinit(wpa_s->bgscan_priv);
85		wpa_s->bgscan = NULL;
86		wpa_s->bgscan_priv = NULL;
87	}
88}
89
90
91int bgscan_notify_scan(struct wpa_supplicant *wpa_s,
92		       struct wpa_scan_results *scan_res)
93{
94	if (wpa_s->bgscan && wpa_s->bgscan_priv)
95		return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv,
96						  scan_res);
97	return 0;
98}
99
100
101void bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s)
102{
103	if (wpa_s->bgscan && wpa_s->bgscan_priv)
104		wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv);
105}
106
107
108void bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above,
109				 int current_signal, int current_noise,
110				 int current_txrate)
111{
112	if (wpa_s->bgscan && wpa_s->bgscan_priv)
113		wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above,
114						    current_signal,
115						    current_noise,
116						    current_txrate);
117}
118