1/* 2 * WPA Supplicant - background scan and roaming interface 3 * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15#include "includes.h" 16 17#include "common.h" 18#include "wpa_supplicant_i.h" 19#include "config_ssid.h" 20#include "bgscan.h" 21 22#ifdef CONFIG_BGSCAN_SIMPLE 23extern const struct bgscan_ops bgscan_simple_ops; 24#endif /* CONFIG_BGSCAN_SIMPLE */ 25 26static const struct bgscan_ops * bgscan_modules[] = { 27#ifdef CONFIG_BGSCAN_SIMPLE 28 &bgscan_simple_ops, 29#endif /* CONFIG_BGSCAN_SIMPLE */ 30 NULL 31}; 32 33 34int 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 79void 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 91int bgscan_notify_scan(struct wpa_supplicant *wpa_s) 92{ 93 if (wpa_s->bgscan && wpa_s->bgscan_priv) 94 return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv); 95 return 0; 96} 97 98 99void bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s) 100{ 101 if (wpa_s->bgscan && wpa_s->bgscan_priv) 102 wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv); 103} 104 105 106void bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above) 107{ 108 if (wpa_s->bgscan && wpa_s->bgscan_priv) 109 wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above); 110} 111