1 /* 2 * WPA Supplicant - background scan and roaming interface 3 * Copyright (c) 2009-2010, Jouni Malinen <j (at) 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 34 int bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) 35 { 36 const char *name = ssid->bgscan; 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 0; 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 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 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 } 99 100 101 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 } 106 107 108 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
