1e28a4053SRui Paulo /*
2e28a4053SRui Paulo * WPA Supplicant - background scan and roaming interface
3e28a4053SRui Paulo * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
4e28a4053SRui Paulo *
5f05cddf9SRui Paulo * This software may be distributed under the terms of the BSD license.
6f05cddf9SRui Paulo * See README for more details.
7e28a4053SRui Paulo */
8e28a4053SRui Paulo
9e28a4053SRui Paulo #include "includes.h"
10e28a4053SRui Paulo
11e28a4053SRui Paulo #include "common.h"
12e28a4053SRui Paulo #include "wpa_supplicant_i.h"
13e28a4053SRui Paulo #include "config_ssid.h"
14e28a4053SRui Paulo #include "bgscan.h"
15e28a4053SRui Paulo
16e28a4053SRui Paulo
17e28a4053SRui Paulo static const struct bgscan_ops * bgscan_modules[] = {
18e28a4053SRui Paulo #ifdef CONFIG_BGSCAN_SIMPLE
19e28a4053SRui Paulo &bgscan_simple_ops,
20e28a4053SRui Paulo #endif /* CONFIG_BGSCAN_SIMPLE */
21f05cddf9SRui Paulo #ifdef CONFIG_BGSCAN_LEARN
22f05cddf9SRui Paulo &bgscan_learn_ops,
23f05cddf9SRui Paulo #endif /* CONFIG_BGSCAN_LEARN */
24e28a4053SRui Paulo NULL
25e28a4053SRui Paulo };
26e28a4053SRui Paulo
27e28a4053SRui Paulo
bgscan_init(struct wpa_supplicant * wpa_s,struct wpa_ssid * ssid,const char * name)28*5b9c547cSRui Paulo int bgscan_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
29*5b9c547cSRui Paulo const char *name)
30e28a4053SRui Paulo {
31e28a4053SRui Paulo const char *params;
32e28a4053SRui Paulo size_t nlen;
33e28a4053SRui Paulo int i;
34e28a4053SRui Paulo const struct bgscan_ops *ops = NULL;
35e28a4053SRui Paulo
36e28a4053SRui Paulo bgscan_deinit(wpa_s);
37e28a4053SRui Paulo
38e28a4053SRui Paulo params = os_strchr(name, ':');
39e28a4053SRui Paulo if (params == NULL) {
40e28a4053SRui Paulo params = "";
41e28a4053SRui Paulo nlen = os_strlen(name);
42e28a4053SRui Paulo } else {
43e28a4053SRui Paulo nlen = params - name;
44e28a4053SRui Paulo params++;
45e28a4053SRui Paulo }
46e28a4053SRui Paulo
47e28a4053SRui Paulo for (i = 0; bgscan_modules[i]; i++) {
48e28a4053SRui Paulo if (os_strncmp(name, bgscan_modules[i]->name, nlen) == 0) {
49e28a4053SRui Paulo ops = bgscan_modules[i];
50e28a4053SRui Paulo break;
51e28a4053SRui Paulo }
52e28a4053SRui Paulo }
53e28a4053SRui Paulo
54e28a4053SRui Paulo if (ops == NULL) {
55e28a4053SRui Paulo wpa_printf(MSG_ERROR, "bgscan: Could not find module "
56e28a4053SRui Paulo "matching the parameter '%s'", name);
57e28a4053SRui Paulo return -1;
58e28a4053SRui Paulo }
59e28a4053SRui Paulo
60e28a4053SRui Paulo wpa_s->bgscan_priv = ops->init(wpa_s, params, ssid);
61e28a4053SRui Paulo if (wpa_s->bgscan_priv == NULL)
62e28a4053SRui Paulo return -1;
63e28a4053SRui Paulo wpa_s->bgscan = ops;
64e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "bgscan: Initialized module '%s' with "
65e28a4053SRui Paulo "parameters '%s'", ops->name, params);
66e28a4053SRui Paulo
67e28a4053SRui Paulo return 0;
68e28a4053SRui Paulo }
69e28a4053SRui Paulo
70e28a4053SRui Paulo
bgscan_deinit(struct wpa_supplicant * wpa_s)71e28a4053SRui Paulo void bgscan_deinit(struct wpa_supplicant *wpa_s)
72e28a4053SRui Paulo {
73e28a4053SRui Paulo if (wpa_s->bgscan && wpa_s->bgscan_priv) {
74e28a4053SRui Paulo wpa_printf(MSG_DEBUG, "bgscan: Deinitializing module '%s'",
75e28a4053SRui Paulo wpa_s->bgscan->name);
76e28a4053SRui Paulo wpa_s->bgscan->deinit(wpa_s->bgscan_priv);
77e28a4053SRui Paulo wpa_s->bgscan = NULL;
78e28a4053SRui Paulo wpa_s->bgscan_priv = NULL;
79e28a4053SRui Paulo }
80e28a4053SRui Paulo }
81e28a4053SRui Paulo
82e28a4053SRui Paulo
bgscan_notify_scan(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res)83f05cddf9SRui Paulo int bgscan_notify_scan(struct wpa_supplicant *wpa_s,
84f05cddf9SRui Paulo struct wpa_scan_results *scan_res)
85e28a4053SRui Paulo {
86e28a4053SRui Paulo if (wpa_s->bgscan && wpa_s->bgscan_priv)
87f05cddf9SRui Paulo return wpa_s->bgscan->notify_scan(wpa_s->bgscan_priv,
88f05cddf9SRui Paulo scan_res);
89e28a4053SRui Paulo return 0;
90e28a4053SRui Paulo }
91e28a4053SRui Paulo
92e28a4053SRui Paulo
bgscan_notify_beacon_loss(struct wpa_supplicant * wpa_s)93e28a4053SRui Paulo void bgscan_notify_beacon_loss(struct wpa_supplicant *wpa_s)
94e28a4053SRui Paulo {
95e28a4053SRui Paulo if (wpa_s->bgscan && wpa_s->bgscan_priv)
96e28a4053SRui Paulo wpa_s->bgscan->notify_beacon_loss(wpa_s->bgscan_priv);
97e28a4053SRui Paulo }
98e28a4053SRui Paulo
99e28a4053SRui Paulo
bgscan_notify_signal_change(struct wpa_supplicant * wpa_s,int above,int current_signal,int current_noise,int current_txrate)100f05cddf9SRui Paulo void bgscan_notify_signal_change(struct wpa_supplicant *wpa_s, int above,
101f05cddf9SRui Paulo int current_signal, int current_noise,
102f05cddf9SRui Paulo int current_txrate)
103e28a4053SRui Paulo {
104e28a4053SRui Paulo if (wpa_s->bgscan && wpa_s->bgscan_priv)
105f05cddf9SRui Paulo wpa_s->bgscan->notify_signal_change(wpa_s->bgscan_priv, above,
106f05cddf9SRui Paulo current_signal,
107f05cddf9SRui Paulo current_noise,
108f05cddf9SRui Paulo current_txrate);
109e28a4053SRui Paulo }
110