1 /*
2 * BSS table
3 * Copyright (c) 2009-2015, Jouni Malinen <j@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 #ifndef BSS_H
10 #define BSS_H
11
12 struct wpa_scan_res;
13
14 #define WPA_BSS_QUAL_INVALID BIT(0)
15 #define WPA_BSS_NOISE_INVALID BIT(1)
16 #define WPA_BSS_LEVEL_INVALID BIT(2)
17 #define WPA_BSS_LEVEL_DBM BIT(3)
18 #define WPA_BSS_AUTHENTICATED BIT(4)
19 #define WPA_BSS_ASSOCIATED BIT(5)
20 #define WPA_BSS_ANQP_FETCH_TRIED BIT(6)
21
22 /**
23 * struct wpa_bss_anqp - ANQP data for a BSS entry (struct wpa_bss)
24 */
25 struct wpa_bss_anqp {
26 /** Number of BSS entries referring to this ANQP data instance */
27 unsigned int users;
28 #ifdef CONFIG_INTERWORKING
29 struct wpabuf *capability_list;
30 struct wpabuf *venue_name;
31 struct wpabuf *network_auth_type;
32 struct wpabuf *roaming_consortium;
33 struct wpabuf *ip_addr_type_availability;
34 struct wpabuf *nai_realm;
35 struct wpabuf *anqp_3gpp;
36 struct wpabuf *domain_name;
37 #endif /* CONFIG_INTERWORKING */
38 #ifdef CONFIG_HS20
39 struct wpabuf *hs20_capability_list;
40 struct wpabuf *hs20_operator_friendly_name;
41 struct wpabuf *hs20_wan_metrics;
42 struct wpabuf *hs20_connection_capability;
43 struct wpabuf *hs20_operating_class;
44 struct wpabuf *hs20_osu_providers_list;
45 #endif /* CONFIG_HS20 */
46 };
47
48 /**
49 * struct wpa_bss - BSS table
50 *
51 * This structure is used to store information about neighboring BSSes in
52 * generic format. It is mainly updated based on scan results from the driver.
53 */
54 struct wpa_bss {
55 /** List entry for struct wpa_supplicant::bss */
56 struct dl_list list;
57 /** List entry for struct wpa_supplicant::bss_id */
58 struct dl_list list_id;
59 /** Unique identifier for this BSS entry */
60 unsigned int id;
61 /** Number of counts without seeing this BSS */
62 unsigned int scan_miss_count;
63 /** Index of the last scan update */
64 unsigned int last_update_idx;
65 /** Information flags about the BSS/IBSS (WPA_BSS_*) */
66 unsigned int flags;
67 /** BSSID */
68 u8 bssid[ETH_ALEN];
69 /** HESSID */
70 u8 hessid[ETH_ALEN];
71 /** SSID */
72 u8 ssid[SSID_MAX_LEN];
73 /** Length of SSID */
74 size_t ssid_len;
75 /** Frequency of the channel in MHz (e.g., 2412 = channel 1) */
76 int freq;
77 /** Beacon interval in TUs (host byte order) */
78 u16 beacon_int;
79 /** Capability information field in host byte order */
80 u16 caps;
81 /** Signal quality */
82 int qual;
83 /** Noise level */
84 int noise;
85 /** Signal level */
86 int level;
87 /** Timestamp of last Beacon/Probe Response frame */
88 u64 tsf;
89 /** Time of the last update (i.e., Beacon or Probe Response RX) */
90 struct os_reltime last_update;
91 /** Estimated throughput in kbps */
92 unsigned int est_throughput;
93 /** Signal-to-noise ratio in dB */
94 int snr;
95 /** ANQP data */
96 struct wpa_bss_anqp *anqp;
97 /** Length of the following IE field in octets (from Probe Response) */
98 size_t ie_len;
99 /** Length of the following Beacon IE field in octets */
100 size_t beacon_ie_len;
101 /* followed by ie_len octets of IEs */
102 /* followed by beacon_ie_len octets of IEs */
103 };
104
105 void wpa_bss_update_start(struct wpa_supplicant *wpa_s);
106 void wpa_bss_update_scan_res(struct wpa_supplicant *wpa_s,
107 struct wpa_scan_res *res,
108 struct os_reltime *fetch_time);
109 void wpa_bss_update_end(struct wpa_supplicant *wpa_s, struct scan_info *info,
110 int new_scan);
111 int wpa_bss_init(struct wpa_supplicant *wpa_s);
112 void wpa_bss_deinit(struct wpa_supplicant *wpa_s);
113 void wpa_bss_flush(struct wpa_supplicant *wpa_s);
114 void wpa_bss_flush_by_age(struct wpa_supplicant *wpa_s, int age);
115 struct wpa_bss * wpa_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid,
116 const u8 *ssid, size_t ssid_len);
117 struct wpa_bss * wpa_bss_get_bssid(struct wpa_supplicant *wpa_s,
118 const u8 *bssid);
119 struct wpa_bss * wpa_bss_get_bssid_latest(struct wpa_supplicant *wpa_s,
120 const u8 *bssid);
121 struct wpa_bss * wpa_bss_get_p2p_dev_addr(struct wpa_supplicant *wpa_s,
122 const u8 *dev_addr);
123 struct wpa_bss * wpa_bss_get_id(struct wpa_supplicant *wpa_s, unsigned int id);
124 struct wpa_bss * wpa_bss_get_id_range(struct wpa_supplicant *wpa_s,
125 unsigned int idf, unsigned int idl);
126 const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie);
127 const u8 * wpa_bss_get_vendor_ie(const struct wpa_bss *bss, u32 vendor_type);
128 const u8 * wpa_bss_get_vendor_ie_beacon(const struct wpa_bss *bss,
129 u32 vendor_type);
130 struct wpabuf * wpa_bss_get_vendor_ie_multi(const struct wpa_bss *bss,
131 u32 vendor_type);
132 struct wpabuf * wpa_bss_get_vendor_ie_multi_beacon(const struct wpa_bss *bss,
133 u32 vendor_type);
134 int wpa_bss_get_max_rate(const struct wpa_bss *bss);
135 int wpa_bss_get_bit_rates(const struct wpa_bss *bss, u8 **rates);
136 struct wpa_bss_anqp * wpa_bss_anqp_alloc(void);
137 int wpa_bss_anqp_unshare_alloc(struct wpa_bss *bss);
138
bss_is_dmg(const struct wpa_bss * bss)139 static inline int bss_is_dmg(const struct wpa_bss *bss)
140 {
141 return bss->freq > 45000;
142 }
143
wpa_bss_update_level(struct wpa_bss * bss,int new_level)144 static inline void wpa_bss_update_level(struct wpa_bss *bss, int new_level)
145 {
146 if (bss != NULL && new_level < 0)
147 bss->level = new_level;
148 }
149
150 #endif /* BSS_H */
151