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 17 static const struct bgscan_ops * bgscan_modules[] = { 18 #ifdef CONFIG_BGSCAN_SIMPLE 19 &bgscan_simple_ops, 20 #endif /* CONFIG_BGSCAN_SIMPLE */ 21 #ifdef CONFIG_BGSCAN_LEARN 22 &bgscan_learn_ops, 23 #endif /* CONFIG_BGSCAN_LEARN */ 24 NULL 25 }; 26 27 28 int bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, 29 const char *name) 30 { 31 const char *params; 32 size_t nlen; 33 int i; 34 const struct bgscan_ops *ops = NULL; 35 36 bgscan_deinit(wpa_s); 37 38 params = os_strchr(name, ':'); 39 if (params == NULL) { 40 params = ""; 41 nlen = os_strlen(name); 42 } else { 43 nlen = params - name; 44 params++; 45 } 46 47 for (i = 0; bgscan_modules[i]; i++) { 48 if (os_strncmp(name, bgscan_modules[i]->name, nlen) == 0) { 49 ops = bgscan_modules[i]; 50 break; 51 } 52 } 53 54 if (ops == NULL) { 55 wpa_printf(MSG_ERROR, "bgscan: Could not find module " 56 "matching the parameter '%s'", name); 57 return -1; 58 } 59 60 wpa_s->bgscan_priv = ops->init(wpa_s, params, ssid); 61 if (wpa_s->bgscan_priv == NULL) 62 return -1; 63 wpa_s->bgscan = ops; 64 wpa_printf(MSG_DEBUG, "bgscan: Initialized module '%s' with " 65 "parameters '%s'", ops->name, params); 66 67 return 0; 68 } 69 70 71 void bgscan_deinit(struct wpa_supplicant *wpa_s) 72 { 73 if (wpa_s->bgscan && wpa_s->bgscan_priv) { 74 wpa_printf(MSG_DEBUG, "bgscan: Deinitializing module '%s'", 75 wpa_s->bgscan->name); 76 wpa_s->bgscan->deinit(wpa_s->bgscan_priv); 77 wpa_s->bgscan = NULL; 78 wpa_s->bgscan_priv = NULL; 79 } 80 } 81 82 83 int bgscan_notify_scan(struct wpa_supplicant *wpa_s, 84 struct wpa_scan_results *scan_res) 85 { 86 if (wpa_s->bgscan && wpa_s->bgscan_priv) 87 return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv, 88 scan_res); 89 return 0; 90 } 91 92 93 void bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s) 94 { 95 if (wpa_s->bgscan && wpa_s->bgscan_priv) 96 wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv); 97 } 98 99 100 void bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above, 101 int current_signal, int current_noise, 102 int current_txrate) 103 { 104 if (wpa_s->bgscan && wpa_s->bgscan_priv) 105 wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above, 106 current_signal, 107 current_noise, 108 current_txrate); 109 } 110
