Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 1 | /* |
| 2 | * WPA Supplicant - auto scan |
| 3 | * Copyright (c) 2012, Intel Corporation. All rights reserved. |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 4 | * Copyright 2015 Intel Deutschland GmbH |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 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 | |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 19 | |
| 20 | static const struct autoscan_ops * autoscan_modules[] = { |
| 21 | #ifdef CONFIG_AUTOSCAN_EXPONENTIAL |
| 22 | &autoscan_exponential_ops, |
| 23 | #endif /* CONFIG_AUTOSCAN_EXPONENTIAL */ |
| 24 | #ifdef CONFIG_AUTOSCAN_PERIODIC |
| 25 | &autoscan_periodic_ops, |
| 26 | #endif /* CONFIG_AUTOSCAN_PERIODIC */ |
| 27 | NULL |
| 28 | }; |
| 29 | |
| 30 | |
| 31 | static void request_scan(struct wpa_supplicant *wpa_s) |
| 32 | { |
Dmitry Shmidt | d5e4923 | 2012-12-03 15:08:10 -0800 | [diff] [blame] | 33 | wpa_s->scan_req = MANUAL_SCAN_REQ; |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 34 | |
| 35 | if (wpa_supplicant_req_sched_scan(wpa_s)) |
| 36 | wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 0); |
| 37 | } |
| 38 | |
| 39 | |
| 40 | int autoscan_init(struct wpa_supplicant *wpa_s, int req_scan) |
| 41 | { |
| 42 | const char *name = wpa_s->conf->autoscan; |
| 43 | const char *params; |
| 44 | size_t nlen; |
| 45 | int i; |
| 46 | const struct autoscan_ops *ops = NULL; |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 47 | struct sched_scan_plan *scan_plans; |
| 48 | |
| 49 | /* Give preference to scheduled scan plans if supported/configured */ |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 50 | if (wpa_s->sched_scan_plans) { |
| 51 | wpa_printf(MSG_DEBUG, |
| 52 | "autoscan: sched_scan_plans set - use it instead"); |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 53 | return 0; |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 54 | } |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 55 | |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 56 | if (wpa_s->autoscan && wpa_s->autoscan_priv) { |
| 57 | wpa_printf(MSG_DEBUG, "autoscan: Already initialized"); |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 58 | return 0; |
Dmitry Shmidt | 9839ecd | 2016-11-07 11:05:47 -0800 | [diff] [blame] | 59 | } |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 60 | |
| 61 | if (name == NULL) |
| 62 | return 0; |
| 63 | |
| 64 | params = os_strchr(name, ':'); |
| 65 | if (params == NULL) { |
| 66 | params = ""; |
| 67 | nlen = os_strlen(name); |
| 68 | } else { |
| 69 | nlen = params - name; |
| 70 | params++; |
| 71 | } |
| 72 | |
| 73 | for (i = 0; autoscan_modules[i]; i++) { |
| 74 | if (os_strncmp(name, autoscan_modules[i]->name, nlen) == 0) { |
| 75 | ops = autoscan_modules[i]; |
| 76 | break; |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | if (ops == NULL) { |
| 81 | wpa_printf(MSG_ERROR, "autoscan: Could not find module " |
| 82 | "matching the parameter '%s'", name); |
| 83 | return -1; |
| 84 | } |
| 85 | |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 86 | scan_plans = os_malloc(sizeof(*wpa_s->sched_scan_plans)); |
| 87 | if (!scan_plans) |
| 88 | return -1; |
| 89 | |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 90 | wpa_s->autoscan_params = NULL; |
| 91 | |
| 92 | wpa_s->autoscan_priv = ops->init(wpa_s, params); |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 93 | if (!wpa_s->autoscan_priv) { |
| 94 | os_free(scan_plans); |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 95 | return -1; |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | scan_plans[0].interval = 5; |
| 99 | scan_plans[0].iterations = 0; |
| 100 | os_free(wpa_s->sched_scan_plans); |
| 101 | wpa_s->sched_scan_plans = scan_plans; |
| 102 | wpa_s->sched_scan_plans_num = 1; |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 103 | wpa_s->autoscan = ops; |
| 104 | |
| 105 | wpa_printf(MSG_DEBUG, "autoscan: Initialized module '%s' with " |
| 106 | "parameters '%s'", ops->name, params); |
| 107 | if (!req_scan) |
| 108 | return 0; |
| 109 | |
| 110 | /* |
| 111 | * Cancelling existing scan requests, if any. |
| 112 | */ |
| 113 | wpa_supplicant_cancel_sched_scan(wpa_s); |
| 114 | wpa_supplicant_cancel_scan(wpa_s); |
| 115 | |
| 116 | /* |
| 117 | * Firing first scan, which will lead to call autoscan_notify_scan. |
| 118 | */ |
| 119 | request_scan(wpa_s); |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | |
| 125 | void autoscan_deinit(struct wpa_supplicant *wpa_s) |
| 126 | { |
| 127 | if (wpa_s->autoscan && wpa_s->autoscan_priv) { |
| 128 | wpa_printf(MSG_DEBUG, "autoscan: Deinitializing module '%s'", |
| 129 | wpa_s->autoscan->name); |
| 130 | wpa_s->autoscan->deinit(wpa_s->autoscan_priv); |
| 131 | wpa_s->autoscan = NULL; |
| 132 | wpa_s->autoscan_priv = NULL; |
| 133 | |
| 134 | wpa_s->scan_interval = 5; |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 135 | |
| 136 | os_free(wpa_s->sched_scan_plans); |
| 137 | wpa_s->sched_scan_plans = NULL; |
| 138 | wpa_s->sched_scan_plans_num = 0; |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 139 | } |
| 140 | } |
| 141 | |
| 142 | |
| 143 | int autoscan_notify_scan(struct wpa_supplicant *wpa_s, |
| 144 | struct wpa_scan_results *scan_res) |
| 145 | { |
| 146 | int interval; |
| 147 | |
| 148 | if (wpa_s->autoscan && wpa_s->autoscan_priv) { |
| 149 | interval = wpa_s->autoscan->notify_scan(wpa_s->autoscan_priv, |
| 150 | scan_res); |
| 151 | |
| 152 | if (interval <= 0) |
| 153 | return -1; |
| 154 | |
| 155 | wpa_s->scan_interval = interval; |
Dmitry Shmidt | d7ff03d | 2015-12-04 14:49:35 -0800 | [diff] [blame] | 156 | wpa_s->sched_scan_plans[0].interval = interval; |
Dmitry Shmidt | 0494959 | 2012-07-19 12:16:46 -0700 | [diff] [blame] | 157 | |
| 158 | request_scan(wpa_s); |
| 159 | } |
| 160 | |
| 161 | return 0; |
| 162 | } |