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
17 extern const struct bgscan_ops bgscan_simple_ops;
18 #endif /* CONFIG_BGSCAN_SIMPLE */
19 #ifdef CONFIG_BGSCAN_LEARN
20 extern const struct bgscan_ops bgscan_learn_ops;
21 #endif /* CONFIG_BGSCAN_LEARN */
22
23 static 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
bgscan_init(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,const char * name)34 int 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
bgscan_deinit(struct wpa_supplicant * wpa_s)79 void 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
bgscan_notify_scan(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res)91 int 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
bgscan_notify_beacon_loss(struct wpa_supplicant * wpa_s)101 void 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
bgscan_notify_signal_change(struct wpa_supplicant * wpa_s,int above,int current_signal,int current_noise,int current_txrate)108 void 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