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7c865c68 TB |
1 | /* |
2 | * WPA Supplicant - auto scan | |
3 | * Copyright (c) 2012, Intel Corporation. All rights reserved. | |
32c02261 | 4 | * Copyright 2015 Intel Deutschland GmbH |
7c865c68 TB |
5 | * |
6 | * This software may be distributed under the terms of the BSD license. | |
7 | * See README for more details. | |
8 | */ | |
9 | ||
10 | #include "includes.h" | |
11 | ||
12 | #include "common.h" | |
13 | #include "config.h" | |
14 | #include "wpa_supplicant_i.h" | |
15 | #include "bss.h" | |
16 | #include "scan.h" | |
17 | #include "autoscan.h" | |
18 | ||
c0fba2b3 TB |
19 | #ifdef CONFIG_AUTOSCAN_EXPONENTIAL |
20 | extern const struct autoscan_ops autoscan_exponential_ops; | |
21 | #endif /* CONFIG_AUTOSCAN_EXPONENTIAL */ | |
22 | ||
e3659c89 TB |
23 | #ifdef CONFIG_AUTOSCAN_PERIODIC |
24 | extern const struct autoscan_ops autoscan_periodic_ops; | |
25 | #endif /* CONFIG_AUTOSCAN_PERIODIC */ | |
26 | ||
7c865c68 | 27 | static const struct autoscan_ops * autoscan_modules[] = { |
c0fba2b3 TB |
28 | #ifdef CONFIG_AUTOSCAN_EXPONENTIAL |
29 | &autoscan_exponential_ops, | |
30 | #endif /* CONFIG_AUTOSCAN_EXPONENTIAL */ | |
e3659c89 TB |
31 | #ifdef CONFIG_AUTOSCAN_PERIODIC |
32 | &autoscan_periodic_ops, | |
33 | #endif /* CONFIG_AUTOSCAN_PERIODIC */ | |
7c865c68 TB |
34 | NULL |
35 | }; | |
36 | ||
37 | ||
38 | static void request_scan(struct wpa_supplicant *wpa_s) | |
39 | { | |
4115303b | 40 | wpa_s->scan_req = MANUAL_SCAN_REQ; |
7c865c68 TB |
41 | |
42 | if (wpa_supplicant_req_sched_scan(wpa_s)) | |
43 | wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 0); | |
44 | } | |
45 | ||
46 | ||
99218999 | 47 | int autoscan_init(struct wpa_supplicant *wpa_s, int req_scan) |
7c865c68 TB |
48 | { |
49 | const char *name = wpa_s->conf->autoscan; | |
50 | const char *params; | |
51 | size_t nlen; | |
52 | int i; | |
53 | const struct autoscan_ops *ops = NULL; | |
32c02261 AS |
54 | struct sched_scan_plan *scan_plans; |
55 | ||
56 | /* Give preference to scheduled scan plans if supported/configured */ | |
57 | if (wpa_s->sched_scan_plans) | |
58 | return 0; | |
7c865c68 TB |
59 | |
60 | if (wpa_s->autoscan && wpa_s->autoscan_priv) | |
61 | return 0; | |
62 | ||
63 | if (name == NULL) | |
64 | return 0; | |
65 | ||
66 | params = os_strchr(name, ':'); | |
67 | if (params == NULL) { | |
68 | params = ""; | |
69 | nlen = os_strlen(name); | |
70 | } else { | |
71 | nlen = params - name; | |
72 | params++; | |
73 | } | |
74 | ||
75 | for (i = 0; autoscan_modules[i]; i++) { | |
76 | if (os_strncmp(name, autoscan_modules[i]->name, nlen) == 0) { | |
77 | ops = autoscan_modules[i]; | |
78 | break; | |
79 | } | |
80 | } | |
81 | ||
82 | if (ops == NULL) { | |
83 | wpa_printf(MSG_ERROR, "autoscan: Could not find module " | |
84 | "matching the parameter '%s'", name); | |
85 | return -1; | |
86 | } | |
87 | ||
32c02261 AS |
88 | scan_plans = os_malloc(sizeof(*wpa_s->sched_scan_plans)); |
89 | if (!scan_plans) | |
90 | return -1; | |
91 | ||
7c865c68 TB |
92 | wpa_s->autoscan_params = NULL; |
93 | ||
94 | wpa_s->autoscan_priv = ops->init(wpa_s, params); | |
32c02261 AS |
95 | if (!wpa_s->autoscan_priv) { |
96 | os_free(scan_plans); | |
7c865c68 | 97 | return -1; |
32c02261 AS |
98 | } |
99 | ||
100 | scan_plans[0].interval = 5; | |
101 | scan_plans[0].iterations = 0; | |
102 | os_free(wpa_s->sched_scan_plans); | |
103 | wpa_s->sched_scan_plans = scan_plans; | |
104 | wpa_s->sched_scan_plans_num = 1; | |
7c865c68 TB |
105 | wpa_s->autoscan = ops; |
106 | ||
107 | wpa_printf(MSG_DEBUG, "autoscan: Initialized module '%s' with " | |
108 | "parameters '%s'", ops->name, params); | |
99218999 JM |
109 | if (!req_scan) |
110 | return 0; | |
7c865c68 TB |
111 | |
112 | /* | |
113 | * Cancelling existing scan requests, if any. | |
114 | */ | |
115 | wpa_supplicant_cancel_sched_scan(wpa_s); | |
116 | wpa_supplicant_cancel_scan(wpa_s); | |
117 | ||
118 | /* | |
119 | * Firing first scan, which will lead to call autoscan_notify_scan. | |
120 | */ | |
121 | request_scan(wpa_s); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | ||
127 | void autoscan_deinit(struct wpa_supplicant *wpa_s) | |
128 | { | |
129 | if (wpa_s->autoscan && wpa_s->autoscan_priv) { | |
130 | wpa_printf(MSG_DEBUG, "autoscan: Deinitializing module '%s'", | |
131 | wpa_s->autoscan->name); | |
132 | wpa_s->autoscan->deinit(wpa_s->autoscan_priv); | |
133 | wpa_s->autoscan = NULL; | |
134 | wpa_s->autoscan_priv = NULL; | |
135 | ||
136 | wpa_s->scan_interval = 5; | |
32c02261 AS |
137 | |
138 | os_free(wpa_s->sched_scan_plans); | |
139 | wpa_s->sched_scan_plans = NULL; | |
140 | wpa_s->sched_scan_plans_num = 0; | |
7c865c68 TB |
141 | } |
142 | } | |
143 | ||
144 | ||
145 | int autoscan_notify_scan(struct wpa_supplicant *wpa_s, | |
146 | struct wpa_scan_results *scan_res) | |
147 | { | |
148 | int interval; | |
149 | ||
150 | if (wpa_s->autoscan && wpa_s->autoscan_priv) { | |
151 | interval = wpa_s->autoscan->notify_scan(wpa_s->autoscan_priv, | |
152 | scan_res); | |
153 | ||
154 | if (interval <= 0) | |
155 | return -1; | |
156 | ||
157 | wpa_s->scan_interval = interval; | |
32c02261 | 158 | wpa_s->sched_scan_plans[0].interval = interval; |
7c865c68 TB |
159 | |
160 | request_scan(wpa_s); | |
161 | } | |
162 | ||
163 | return 0; | |
164 | } |