1 /*
2 * FST module - interface definitions
3 * Copyright (c) 2014, Qualcomm Atheros, Inc.
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #ifndef FST_H
10 #define FST_H
11
12 #ifdef CONFIG_FST
13
14 #include "common/defs.h"
15 #include "fst/fst_ctrl_iface.h"
16
17 /* FST module hostap integration API */
18
19 #define US_IN_MS 1000
20 #define LLT_UNIT_US 32 /* See 10.32.2.2 Transitioning between states */
21
22 /*
23 * These were originally
24 * #define FST_LLT_MS_TO_VAL(m) (((u32) (m)) * US_IN_MS / LLT_UNIT_US)
25 * #define FST_LLT_VAL_TO_MS(v) (((u32) (v)) * LLT_UNIT_US / US_IN_MS)
26 * #define FST_MAX_LLT_MS FST_LLT_VAL_TO_MS(-1)
27 * but those can overflow 32-bit unsigned integer, so use alternative defines
28 * to avoid undefined behavior with such overflow.
29 * LLT_UNIT_US/US_IN_MS = 32/1000 = 4/125
30 */
31 #define FST_LLT_MS_TO_VAL(m) (((u32) (m)) * 125 / 4)
32 #define FST_LLT_VAL_TO_MS(v) (((u32) (v)) * 4 / 125)
33 #define FST_MAX_LLT_MS (((u32) -1) / 4)
34 #define FST_MAX_PRIO_VALUE ((u8) -1)
35 #define FST_MAX_GROUP_ID_LEN IFNAMSIZ
36
37 #define FST_DEFAULT_LLT_CFG_VALUE 50
38
39 struct hostapd_hw_modes;
40 struct ieee80211_mgmt;
41 struct fst_iface;
42 struct fst_group;
43 struct fst_session;
44 struct fst_get_peer_ctx;
45 struct fst_ctrl_handle;
46
47 struct fst_wpa_obj {
48 void *ctx;
49
50 /**
51 * get_bssid - Get BSSID of the interface
52 * @ctx: User context %ctx
53 * Returns: BSSID for success, %NULL for failure.
54 *
55 * NOTE: For AP it returns the own BSSID, while for STA - the BSSID of
56 * the associated AP.
57 */
58 const u8 * (*get_bssid)(void *ctx);
59
60 /**
61 * get_channel_info - Get current channel info
62 * @ctx: User context %ctx
63 * @hw_mode: OUT, current HW mode
64 * @channel: OUT, current channel
65 */
66 void (*get_channel_info)(void *ctx, enum hostapd_hw_mode *hw_mode,
67 u8 *channel);
68
69 /**
70 * get_hw_modes - Get hardware modes
71 * @ctx: User context %ctx
72 * @modes: OUT, pointer on array of hw modes
73 *
74 * Returns: Number of hw modes available.
75 */
76 int (*get_hw_modes)(void *ctx, struct hostapd_hw_modes **modes);
77
78 /**
79 * set_ies - Set interface's MB IE
80 * @ctx: User context %ctx
81 * @fst_ies: MB IE buffer (owned by FST module)
82 */
83 void (*set_ies)(void *ctx, const struct wpabuf *fst_ies);
84
85 /**
86 * send_action - Send FST Action frame via the interface
87 * @ctx: User context %ctx
88 * @addr: Address of the destination STA
89 * @data: Action frame buffer
90 * Returns: 0 for success, negative error code for failure.
91 */
92 int (*send_action)(void *ctx, const u8 *addr, struct wpabuf *data);
93
94 /**
95 * get_mb_ie - Get last MB IE received from STA
96 * @ctx: User context %ctx
97 * @addr: Address of the STA
98 * Returns: MB IE buffer, %NULL if no MB IE received from the STA
99 */
100 const struct wpabuf * (*get_mb_ie)(void *ctx, const u8 *addr);
101
102 /**
103 * update_mb_ie - Update last MB IE received from STA
104 * @ctx: User context %ctx
105 * @addr: Address of the STA
106 * @buf: Buffer that contains the MB IEs data
107 * @size: Size of data in %buf
108 */
109 void (*update_mb_ie)(void *ctx, const u8 *addr,
110 const u8 *buf, size_t size);
111
112 /**
113 * get_peer_first - Get MAC address of the 1st connected STA
114 * @ctx: User context %ctx
115 * @get_ctx: Context to be used for %get_peer_next call
116 * @mb_only: %true if only multi-band capable peer should be reported
117 * Returns: Address of the 1st connected STA, %NULL if no STAs connected
118 */
119 const u8 * (*get_peer_first)(void *ctx,
120 struct fst_get_peer_ctx **get_ctx,
121 bool mb_only);
122 /**
123 * get_peer_next - Get MAC address of the next connected STA
124 * @ctx: User context %ctx
125 * @get_ctx: Context received from %get_peer_first or previous
126 * %get_peer_next call
127 * @mb_only: %true if only multi-band capable peer should be reported
128 * Returns: Address of the next connected STA, %NULL if no more STAs
129 * connected
130 */
131 const u8 * (*get_peer_next)(void *ctx,
132 struct fst_get_peer_ctx **get_ctx,
133 bool mb_only);
134 };
135
136 /**
137 * fst_global_init - Global FST module initiator
138 * Returns: 0 for success, negative error code for failure.
139 * Note: The purpose of this function is to allocate and initiate global
140 * FST module data structures (linked lists, static data etc.)
141 * This function should be called prior to the 1st %fst_attach call.
142 */
143 int fst_global_init(void);
144
145 /**
146 * fst_global_deinit - Global FST module de-initiator
147 * Note: The purpose of this function is to deallocate and de-initiate global
148 * FST module data structures (linked lists, static data etc.)
149 */
150 void fst_global_deinit(void);
151
152 /**
153 * struct fst_ctrl - Notification interface for FST module
154 */
155 struct fst_ctrl {
156 /**
157 * init - Initialize the notification interface
158 * Returns: 0 for success, negative error code for failure.
159 */
160 int (*init)(void);
161
162 /**
163 * deinit - Deinitialize the notification interface
164 */
165 void (*deinit)(void);
166
167 /**
168 * on_group_created - Notify about FST group creation
169 * Returns: 0 for success, negative error code for failure.
170 */
171 int (*on_group_created)(struct fst_group *g);
172
173 /**
174 * on_group_deleted - Notify about FST group deletion
175 */
176 void (*on_group_deleted)(struct fst_group *g);
177
178 /**
179 * on_iface_added - Notify about interface addition
180 * Returns: 0 for success, negative error code for failure.
181 */
182 int (*on_iface_added)(struct fst_iface *i);
183
184 /**
185 * on_iface_removed - Notify about interface removal
186 */
187 void (*on_iface_removed)(struct fst_iface *i);
188
189 /**
190 * on_session_added - Notify about FST session addition
191 * Returns: 0 for success, negative error code for failure.
192 */
193 int (*on_session_added)(struct fst_session *s);
194
195 /**
196 * on_session_removed - Notify about FST session removal
197 */
198 void (*on_session_removed)(struct fst_session *s);
199
200 /**
201 * on_event - Notify about FST event
202 * @event_type: Event type
203 * @i: Interface object that relates to the event or NULL
204 * @g: Group object that relates to the event or NULL
205 * @extra - Event specific data (see fst_ctrl_iface.h for more info)
206 */
207 void (*on_event)(enum fst_event_type event_type, struct fst_iface *i,
208 struct fst_session *s,
209 const union fst_event_extra *extra);
210 };
211
212 struct fst_ctrl_handle * fst_global_add_ctrl(const struct fst_ctrl *ctrl);
213 void fst_global_del_ctrl(struct fst_ctrl_handle *h);
214
215 /**
216 * NOTE: These values have to be read from configuration file
217 */
218 struct fst_iface_cfg {
219 char group_id[FST_MAX_GROUP_ID_LEN + 1];
220 u8 priority;
221 u32 llt;
222 };
223
224 /**
225 * fst_attach - Attach interface to an FST group according to configuration read
226 * @ifname: Interface name
227 * @own_addr: Own interface MAC address
228 * @iface_obj: Callbacks to be used by FST module to communicate with
229 * hostapd/wpa_supplicant
230 * @cfg: FST-related interface configuration read from the configuration file
231 * Returns: FST interface object for success, %NULL for failure.
232 */
233 struct fst_iface * fst_attach(const char *ifname,
234 const u8 *own_addr,
235 const struct fst_wpa_obj *iface_obj,
236 const struct fst_iface_cfg *cfg);
237
238 /**
239 * fst_detach - Detach an interface
240 * @iface: FST interface object
241 */
242 void fst_detach(struct fst_iface *iface);
243
244 /* FST module inputs */
245 /**
246 * fst_rx_action - FST Action frames handler
247 * @iface: FST interface object
248 * @mgmt: Action frame arrived
249 * @len: Action frame length
250 */
251 void fst_rx_action(struct fst_iface *iface, const struct ieee80211_mgmt *mgmt,
252 size_t len);
253
254 /**
255 * fst_notify_peer_connected - FST STA connect handler
256 * @iface: FST interface object
257 * @addr: Address of the connected STA
258 */
259 void fst_notify_peer_connected(struct fst_iface *iface, const u8 *addr);
260
261 /**
262 * fst_notify_peer_disconnected - FST STA disconnect handler
263 * @iface: FST interface object
264 * @addr: Address of the disconnected STA
265 */
266 void fst_notify_peer_disconnected(struct fst_iface *iface, const u8 *addr);
267
268 /* FST module auxiliary routines */
269
270 /**
271 * fst_are_ifaces_aggregated - Determines whether 2 interfaces belong to the
272 * same FST group
273 * @iface1: 1st FST interface object
274 * @iface1: 2nd FST interface object
275 *
276 * Returns: %true if the interfaces belong to the same FST group,
277 * %false otherwise
278 */
279 bool fst_are_ifaces_aggregated(struct fst_iface *iface1,
280 struct fst_iface *iface2);
281
282 /**
283 * fst_update_mac_addr - Notify FST about MAC address change
284 * @iface: FST interface object
285 * @addr: New MAC address
286 */
287 void fst_update_mac_addr(struct fst_iface *iface, const u8 *addr);
288
289 #else /* CONFIG_FST */
290
fst_global_init(void)291 static inline int fst_global_init(void)
292 {
293 return 0;
294 }
295
fst_global_start(void)296 static inline int fst_global_start(void)
297 {
298 return 0;
299 }
300
fst_global_stop(void)301 static inline void fst_global_stop(void)
302 {
303 }
304
fst_global_deinit(void)305 static inline void fst_global_deinit(void)
306 {
307 }
308
309 #endif /* CONFIG_FST */
310
311 #endif /* FST_H */
312
