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
17static const struct bgscan_ops * bgscan_modules[] = {
18#ifdef CONFIG_BGSCAN_SIMPLE
19	&bgscan_simple_ops,
20#endif /* CONFIG_BGSCAN_SIMPLE */
21#ifdef CONFIG_BGSCAN_LEARN
22	&bgscan_learn_ops,
23#endif /* CONFIG_BGSCAN_LEARN */
24	NULL
25};
26
27
28int bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
29		const char *name)
30{
31	const char *params;
32	size_t nlen;
33	int i;
34	const struct bgscan_ops *ops = NULL;
35
36	bgscan_deinit(wpa_s);
37
38	params = os_strchr(name, ':');
39	if (params == NULL) {
40		params = "";
41		nlen = os_strlen(name);
42	} else {
43		nlen = params - name;
44		params++;
45	}
46
47	for (i = 0; bgscan_modules[i]; i++) {
48		if (os_strncmp(name, bgscan_modules[i]->name, nlen) == 0) {
49			ops = bgscan_modules[i];
50			break;
51		}
52	}
53
54	if (ops == NULL) {
55		wpa_printf(MSG_ERROR, "bgscan: Could not find module "
56			   "matching the parameter '%s'", name);
57		return -1;
58	}
59
60	wpa_s->bgscan_priv = ops->init(wpa_s, params, ssid);
61	if (wpa_s->bgscan_priv == NULL)
62		return -1;
63	wpa_s->bgscan = ops;
64	wpa_printf(MSG_DEBUG, "bgscan: Initialized module '%s' with "
65		   "parameters '%s'", ops->name, params);
66
67	return 0;
68}
69
70
71void bgscan_deinit(struct wpa_supplicant *wpa_s)
72{
73	if (wpa_s->bgscan && wpa_s->bgscan_priv) {
74		wpa_printf(MSG_DEBUG, "bgscan: Deinitializing module '%s'",
75			   wpa_s->bgscan->name);
76		wpa_s->bgscan->deinit(wpa_s->bgscan_priv);
77		wpa_s->bgscan = NULL;
78		wpa_s->bgscan_priv = NULL;
79	}
80}
81
82
83int bgscan_notify_scan(struct wpa_supplicant *wpa_s,
84		       struct wpa_scan_results *scan_res)
85{
86	if (wpa_s->bgscan && wpa_s->bgscan_priv)
87		return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv,
88						  scan_res);
89	return 0;
90}
91
92
93void bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s)
94{
95	if (wpa_s->bgscan && wpa_s->bgscan_priv)
96		wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv);
97}
98
99
100void bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above,
101				 int current_signal, int current_noise,
102				 int current_txrate)
103{
104	if (wpa_s->bgscan && wpa_s->bgscan_priv)
105		wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above,
106						    current_signal,
107						    current_noise,
108						    current_txrate);
109}
110