| Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame^] | 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 |
| 23 | extern const struct bgscan_ops bgscan_simple_ops; |
| 24 | #endif /* CONFIG_BGSCAN_SIMPLE */ |
| 25 | #ifdef CONFIG_BGSCAN_LEARN |
| 26 | extern const struct bgscan_ops bgscan_learn_ops; |
| 27 | #endif /* CONFIG_BGSCAN_LEARN */ |
| 28 | |
| 29 | static const struct bgscan_ops * bgscan_modules[] = { |
| 30 | #ifdef CONFIG_BGSCAN_SIMPLE |
| 31 | &bgscan_simple_ops, |
| 32 | #endif /* CONFIG_BGSCAN_SIMPLE */ |
| 33 | #ifdef CONFIG_BGSCAN_LEARN |
| 34 | &bgscan_learn_ops, |
| 35 | #endif /* CONFIG_BGSCAN_LEARN */ |
| 36 | NULL |
| 37 | }; |
| 38 | |
| 39 | |
| 40 | int bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) |
| 41 | { |
| 42 | const char *name = ssid->bgscan; |
| 43 | const char *params; |
| 44 | size_t nlen; |
| 45 | int i; |
| 46 | const struct bgscan_ops *ops = NULL; |
| 47 | |
| 48 | bgscan_deinit(wpa_s); |
| 49 | if (name == NULL) |
| 50 | return 0; |
| 51 | |
| 52 | params = os_strchr(name, ':'); |
| 53 | if (params == NULL) { |
| 54 | params = ""; |
| 55 | nlen = os_strlen(name); |
| 56 | } else { |
| 57 | nlen = params - name; |
| 58 | params++; |
| 59 | } |
| 60 | |
| 61 | for (i = 0; bgscan_modules[i]; i++) { |
| 62 | if (os_strncmp(name, bgscan_modules[i]->name, nlen) == 0) { |
| 63 | ops = bgscan_modules[i]; |
| 64 | break; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | if (ops == NULL) { |
| 69 | wpa_printf(MSG_ERROR, "bgscan: Could not find module " |
| 70 | "matching the parameter '%s'", name); |
| 71 | return -1; |
| 72 | } |
| 73 | |
| 74 | wpa_s->bgscan_priv = ops->init(wpa_s, params, ssid); |
| 75 | if (wpa_s->bgscan_priv == NULL) |
| 76 | return -1; |
| 77 | wpa_s->bgscan = ops; |
| 78 | wpa_printf(MSG_DEBUG, "bgscan: Initialized module '%s' with " |
| 79 | "parameters '%s'", ops->name, params); |
| 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | |
| 85 | void bgscan_deinit(struct wpa_supplicant *wpa_s) |
| 86 | { |
| 87 | if (wpa_s->bgscan && wpa_s->bgscan_priv) { |
| 88 | wpa_printf(MSG_DEBUG, "bgscan: Deinitializing module '%s'", |
| 89 | wpa_s->bgscan->name); |
| 90 | wpa_s->bgscan->deinit(wpa_s->bgscan_priv); |
| 91 | wpa_s->bgscan = NULL; |
| 92 | wpa_s->bgscan_priv = NULL; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | |
| 97 | int bgscan_notify_scan(struct wpa_supplicant *wpa_s, |
| 98 | struct wpa_scan_results *scan_res) |
| 99 | { |
| 100 | if (wpa_s->bgscan && wpa_s->bgscan_priv) |
| 101 | return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv, |
| 102 | scan_res); |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | void bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s) |
| 108 | { |
| 109 | if (wpa_s->bgscan && wpa_s->bgscan_priv) |
| 110 | wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv); |
| 111 | } |
| 112 | |
| 113 | |
| 114 | void bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above, |
| 115 | int current_signal, int current_noise, |
| 116 | int current_txrate) |
| 117 | { |
| 118 | if (wpa_s->bgscan && wpa_s->bgscan_priv) |
| 119 | wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above, |
| 120 | current_signal, |
| 121 | current_noise, |
| 122 | current_txrate); |
| 123 | } |