Line data Source code
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 : struct wpa_bss_anqp_elem {
23 : struct dl_list list;
24 : u16 infoid;
25 : struct wpabuf *payload;
26 : };
27 :
28 : /**
29 : * struct wpa_bss_anqp - ANQP data for a BSS entry (struct wpa_bss)
30 : */
31 : struct wpa_bss_anqp {
32 : /** Number of BSS entries referring to this ANQP data instance */
33 : unsigned int users;
34 : #ifdef CONFIG_INTERWORKING
35 : struct wpabuf *capability_list;
36 : struct wpabuf *venue_name;
37 : struct wpabuf *network_auth_type;
38 : struct wpabuf *roaming_consortium;
39 : struct wpabuf *ip_addr_type_availability;
40 : struct wpabuf *nai_realm;
41 : struct wpabuf *anqp_3gpp;
42 : struct wpabuf *domain_name;
43 : struct dl_list anqp_elems; /* list of struct wpa_bss_anqp_elem */
44 : #endif /* CONFIG_INTERWORKING */
45 : #ifdef CONFIG_HS20
46 : struct wpabuf *hs20_capability_list;
47 : struct wpabuf *hs20_operator_friendly_name;
48 : struct wpabuf *hs20_wan_metrics;
49 : struct wpabuf *hs20_connection_capability;
50 : struct wpabuf *hs20_operating_class;
51 : struct wpabuf *hs20_osu_providers_list;
52 : #endif /* CONFIG_HS20 */
53 : };
54 :
55 : /**
56 : * struct wpa_bss - BSS table
57 : *
58 : * This structure is used to store information about neighboring BSSes in
59 : * generic format. It is mainly updated based on scan results from the driver.
60 : */
61 : struct wpa_bss {
62 : /** List entry for struct wpa_supplicant::bss */
63 : struct dl_list list;
64 : /** List entry for struct wpa_supplicant::bss_id */
65 : struct dl_list list_id;
66 : /** Unique identifier for this BSS entry */
67 : unsigned int id;
68 : /** Number of counts without seeing this BSS */
69 : unsigned int scan_miss_count;
70 : /** Index of the last scan update */
71 : unsigned int last_update_idx;
72 : /** Information flags about the BSS/IBSS (WPA_BSS_*) */
73 : unsigned int flags;
74 : /** BSSID */
75 : u8 bssid[ETH_ALEN];
76 : /** HESSID */
77 : u8 hessid[ETH_ALEN];
78 : /** SSID */
79 : u8 ssid[SSID_MAX_LEN];
80 : /** Length of SSID */
81 : size_t ssid_len;
82 : /** Frequency of the channel in MHz (e.g., 2412 = channel 1) */
83 : int freq;
84 : /** Beacon interval in TUs (host byte order) */
85 : u16 beacon_int;
86 : /** Capability information field in host byte order */
87 : u16 caps;
88 : /** Signal quality */
89 : int qual;
90 : /** Noise level */
91 : int noise;
92 : /** Signal level */
93 : int level;
94 : /** Timestamp of last Beacon/Probe Response frame */
95 : u64 tsf;
96 : /** Time of the last update (i.e., Beacon or Probe Response RX) */
97 : struct os_reltime last_update;
98 : /** Estimated throughput in kbps */
99 : unsigned int est_throughput;
100 : /** Signal-to-noise ratio in dB */
101 : int snr;
102 : /** ANQP data */
103 : struct wpa_bss_anqp *anqp;
104 : /** Length of the following IE field in octets (from Probe Response) */
105 : size_t ie_len;
106 : /** Length of the following Beacon IE field in octets */
107 : size_t beacon_ie_len;
108 : /* followed by ie_len octets of IEs */
109 : /* followed by beacon_ie_len octets of IEs */
110 : };
111 :
112 : void wpa_bss_update_start(struct wpa_supplicant *wpa_s);
113 : void wpa_bss_update_scan_res(struct wpa_supplicant *wpa_s,
114 : struct wpa_scan_res *res,
115 : struct os_reltime *fetch_time);
116 : void wpa_bss_remove(struct wpa_supplicant *wpa_s, struct wpa_bss *bss,
117 : const char *reason);
118 : void wpa_bss_update_end(struct wpa_supplicant *wpa_s, struct scan_info *info,
119 : int new_scan);
120 : int wpa_bss_init(struct wpa_supplicant *wpa_s);
121 : void wpa_bss_deinit(struct wpa_supplicant *wpa_s);
122 : void wpa_bss_flush(struct wpa_supplicant *wpa_s);
123 : void wpa_bss_flush_by_age(struct wpa_supplicant *wpa_s, int age);
124 : struct wpa_bss * wpa_bss_get(struct wpa_supplicant *wpa_s, const u8 *bssid,
125 : const u8 *ssid, size_t ssid_len);
126 : struct wpa_bss * wpa_bss_get_bssid(struct wpa_supplicant *wpa_s,
127 : const u8 *bssid);
128 : struct wpa_bss * wpa_bss_get_bssid_latest(struct wpa_supplicant *wpa_s,
129 : const u8 *bssid);
130 : struct wpa_bss * wpa_bss_get_p2p_dev_addr(struct wpa_supplicant *wpa_s,
131 : const u8 *dev_addr);
132 : struct wpa_bss * wpa_bss_get_id(struct wpa_supplicant *wpa_s, unsigned int id);
133 : struct wpa_bss * wpa_bss_get_id_range(struct wpa_supplicant *wpa_s,
134 : unsigned int idf, unsigned int idl);
135 : const u8 * wpa_bss_get_ie(const struct wpa_bss *bss, u8 ie);
136 : const u8 * wpa_bss_get_vendor_ie(const struct wpa_bss *bss, u32 vendor_type);
137 : const u8 * wpa_bss_get_vendor_ie_beacon(const struct wpa_bss *bss,
138 : u32 vendor_type);
139 : struct wpabuf * wpa_bss_get_vendor_ie_multi(const struct wpa_bss *bss,
140 : u32 vendor_type);
141 : struct wpabuf * wpa_bss_get_vendor_ie_multi_beacon(const struct wpa_bss *bss,
142 : u32 vendor_type);
143 : int wpa_bss_get_max_rate(const struct wpa_bss *bss);
144 : int wpa_bss_get_bit_rates(const struct wpa_bss *bss, u8 **rates);
145 : struct wpa_bss_anqp * wpa_bss_anqp_alloc(void);
146 : int wpa_bss_anqp_unshare_alloc(struct wpa_bss *bss);
147 :
148 14537 : static inline int bss_is_dmg(const struct wpa_bss *bss)
149 : {
150 14537 : return bss->freq > 45000;
151 : }
152 :
153 : /**
154 : * Test whether a BSS is a PBSS.
155 : * This checks whether a BSS is a DMG-band PBSS. PBSS is used for P2P DMG
156 : * network.
157 : */
158 5113 : static inline int bss_is_pbss(struct wpa_bss *bss)
159 : {
160 5113 : return bss_is_dmg(bss) &&
161 0 : (bss->caps & IEEE80211_CAP_DMG_MASK) == IEEE80211_CAP_DMG_PBSS;
162 : }
163 :
164 7 : static inline void wpa_bss_update_level(struct wpa_bss *bss, int new_level)
165 : {
166 7 : if (bss != NULL && new_level < 0)
167 7 : bss->level = new_level;
168 7 : }
169 :
170 : #endif /* BSS_H */
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