1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
* WPA Supplicant - auto scan
* Copyright (c) 2012, Intel Corporation. All rights reserved.
*
* 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"
#ifdef CONFIG_AUTOSCAN_EXPONENTIAL
extern const struct autoscan_ops autoscan_exponential_ops;
#endif /* CONFIG_AUTOSCAN_EXPONENTIAL */
#ifdef CONFIG_AUTOSCAN_PERIODIC
extern const struct autoscan_ops autoscan_periodic_ops;
#endif /* CONFIG_AUTOSCAN_PERIODIC */
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 = 2;
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;
if (wpa_s->autoscan && wpa_s->autoscan_priv)
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;
}
wpa_s->autoscan_params = NULL;
wpa_s->autoscan_priv = ops->init(wpa_s, params);
if (wpa_s->autoscan_priv == NULL)
return -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;
wpa_s->sched_scan_interval = 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_interval = interval;
request_scan(wpa_s);
}
return 0;
}
|
