1 /*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: src/sys/net80211/ieee80211_proto.h,v 1.33 2008/10/26 01:01:01 sam Exp $
27 */
28 #ifndef _NET80211_IEEE80211_PROTO_H_
29 #define _NET80211_IEEE80211_PROTO_H_
30
31 /*
32 * 802.11 protocol implementation definitions.
33 */
34
35 enum ieee80211_state {
36 IEEE80211_S_INIT = 0, /* default state */
37 IEEE80211_S_SCAN = 1, /* scanning */
38 IEEE80211_S_AUTH = 2, /* try to authenticate */
39 IEEE80211_S_ASSOC = 3, /* try to assoc */
40 IEEE80211_S_CAC = 4, /* doing channel availability check */
41 IEEE80211_S_RUN = 5, /* operational (e.g. associated) */
42 IEEE80211_S_CSA = 6, /* channel switch announce pending */
43 IEEE80211_S_SLEEP = 7, /* power save */
44 };
45 #define IEEE80211_S_MAX (IEEE80211_S_SLEEP+1)
46
47 #define IEEE80211_SEND_MGMT(_ni,_type,_arg) \
48 ((*(_ni)->ni_ic->ic_send_mgmt)(_ni, _type, _arg))
49
50 extern const char *ieee80211_mgt_subtype_name[];
51 extern const char *ieee80211_phymode_name[IEEE80211_MODE_MAX];
52 extern const int ieee80211_opcap[IEEE80211_OPMODE_MAX];
53
54 void ieee80211_proto_attach(struct ieee80211com *);
55 void ieee80211_proto_detach(struct ieee80211com *);
56 void ieee80211_proto_vattach(struct ieee80211vap *);
57 void ieee80211_proto_vdetach(struct ieee80211vap *);
58
59 void ieee80211_syncifflag_locked(struct ieee80211com *, int flag);
60 void ieee80211_syncflag(struct ieee80211vap *, int flag);
61 void ieee80211_syncflag_ext(struct ieee80211vap *, int flag);
62
63 #define ieee80211_input(ni, m, rssi, noise, rstamp) \
64 ((ni)->ni_vap->iv_input(ni, m, rssi, noise, rstamp))
65 int ieee80211_input_all(struct ieee80211com *, struct mbuf *,
66 int, int, uint32_t);
67 struct ieee80211_bpf_params;
68 int ieee80211_mgmt_output(struct ieee80211_node *, struct mbuf *, int,
69 struct ieee80211_bpf_params *);
70 int ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *,
71 const struct ieee80211_bpf_params *);
72 int ieee80211_output(struct ifnet *, struct mbuf *,
73 struct sockaddr *, struct rtentry *);
74 void ieee80211_start(struct ifnet *);
75 int ieee80211_send_nulldata(struct ieee80211_node *);
76 int ieee80211_classify(struct ieee80211_node *, struct mbuf *m);
77 struct mbuf *ieee80211_encap(struct ieee80211_node *, struct mbuf *);
78 int ieee80211_send_mgmt(struct ieee80211_node *, int, int);
79 struct ieee80211_appie;
80 int ieee80211_send_probereq(struct ieee80211_node *ni,
81 const uint8_t sa[IEEE80211_ADDR_LEN],
82 const uint8_t da[IEEE80211_ADDR_LEN],
83 const uint8_t bssid[IEEE80211_ADDR_LEN],
84 const uint8_t *ssid, size_t ssidlen);
85 /*
86 * The formation of ProbeResponse frames requires guidance to
87 * deal with legacy clients. When the client is identified as
88 * "legacy 11b" ieee80211_send_proberesp is passed this token.
89 */
90 #define IEEE80211_SEND_LEGACY_11B 0x1 /* legacy 11b client */
91 #define IEEE80211_SEND_LEGACY_11 0x2 /* other legacy client */
92 #define IEEE80211_SEND_LEGACY 0x3 /* any legacy client */
93 struct mbuf *ieee80211_alloc_proberesp(struct ieee80211_node *, int);
94 int ieee80211_send_proberesp(struct ieee80211vap *,
95 const uint8_t da[IEEE80211_ADDR_LEN], int);
96 struct mbuf *ieee80211_alloc_rts(struct ieee80211com *ic,
97 const uint8_t [IEEE80211_ADDR_LEN],
98 const uint8_t [IEEE80211_ADDR_LEN], uint16_t);
99 struct mbuf *ieee80211_alloc_cts(struct ieee80211com *,
100 const uint8_t [IEEE80211_ADDR_LEN], uint16_t);
101
102 void ieee80211_reset_erp(struct ieee80211com *);
103 void ieee80211_set_shortslottime(struct ieee80211com *, int onoff);
104 int ieee80211_iserp_rateset(const struct ieee80211_rateset *);
105 void ieee80211_setbasicrates(struct ieee80211_rateset *,
106 enum ieee80211_phymode);
107 void ieee80211_addbasicrates(struct ieee80211_rateset *,
108 enum ieee80211_phymode);
109
110 /*
111 * Return the size of the 802.11 header for a management or data frame.
112 */
113 static __inline int
114 ieee80211_hdrsize(const void *data)
115 {
116 const struct ieee80211_frame *wh = data;
117 int size = sizeof(struct ieee80211_frame);
118
119 /* NB: we don't handle control frames */
120 KASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL,
121 ("%s: control frame", __func__));
122 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
123 size += IEEE80211_ADDR_LEN;
124 if (IEEE80211_QOS_HAS_SEQ(wh))
125 size += sizeof(uint16_t);
126 return size;
127 }
128
129 /*
130 * Like ieee80211_hdrsize, but handles any type of frame.
131 */
132 static __inline int
133 ieee80211_anyhdrsize(const void *data)
134 {
135 const struct ieee80211_frame *wh = data;
136
137 if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) {
138 switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) {
139 case IEEE80211_FC0_SUBTYPE_CTS:
140 case IEEE80211_FC0_SUBTYPE_ACK:
141 return sizeof(struct ieee80211_frame_ack);
142 case IEEE80211_FC0_SUBTYPE_BAR:
143 return sizeof(struct ieee80211_frame_bar);
144 }
145 return sizeof(struct ieee80211_frame_min);
146 } else
147 return ieee80211_hdrsize(data);
148 }
149
150 /*
151 * Template for an in-kernel authenticator. Authenticators
152 * register with the protocol code and are typically loaded
153 * as separate modules as needed. One special authenticator
154 * is xauth; it intercepts requests so that protocols like
155 * WPA can be handled in user space.
156 */
157 struct ieee80211_authenticator {
158 const char *ia_name; /* printable name */
159 int (*ia_attach)(struct ieee80211vap *);
160 void (*ia_detach)(struct ieee80211vap *);
161 void (*ia_node_join)(struct ieee80211_node *);
162 void (*ia_node_leave)(struct ieee80211_node *);
163 };
164 void ieee80211_authenticator_register(int type,
165 const struct ieee80211_authenticator *);
166 void ieee80211_authenticator_unregister(int type);
167 const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth);
168
169 struct ieee80211req;
170 /*
171 * Template for an MAC ACL policy module. Such modules
172 * register with the protocol code and are passed the sender's
173 * address of each received auth frame for validation.
174 */
175 struct ieee80211_aclator {
176 const char *iac_name; /* printable name */
177 int (*iac_attach)(struct ieee80211vap *);
178 void (*iac_detach)(struct ieee80211vap *);
179 int (*iac_check)(struct ieee80211vap *,
180 const uint8_t mac[IEEE80211_ADDR_LEN]);
181 int (*iac_add)(struct ieee80211vap *,
182 const uint8_t mac[IEEE80211_ADDR_LEN]);
183 int (*iac_remove)(struct ieee80211vap *,
184 const uint8_t mac[IEEE80211_ADDR_LEN]);
185 int (*iac_flush)(struct ieee80211vap *);
186 int (*iac_setpolicy)(struct ieee80211vap *, int);
187 int (*iac_getpolicy)(struct ieee80211vap *);
188 int (*iac_setioctl)(struct ieee80211vap *, struct ieee80211req *);
189 int (*iac_getioctl)(struct ieee80211vap *, struct ieee80211req *);
190 };
191 void ieee80211_aclator_register(const struct ieee80211_aclator *);
192 void ieee80211_aclator_unregister(const struct ieee80211_aclator *);
193 const struct ieee80211_aclator *ieee80211_aclator_get(const char *name);
194
195 /* flags for ieee80211_fix_rate() */
196 #define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */
197 #define IEEE80211_F_DOFRATE 0x00000002 /* use fixed legacy rate */
198 #define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */
199 #define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */
200 #define IEEE80211_F_DOBRS 0x00000010 /* check basic rate set */
201 #define IEEE80211_F_JOIN 0x00000020 /* sta joining our bss */
202 #define IEEE80211_F_DOFMCS 0x00000040 /* use fixed HT rate */
203 int ieee80211_fix_rate(struct ieee80211_node *,
204 struct ieee80211_rateset *, int);
205
206 /*
207 * WME/WMM support.
208 */
209 struct wmeParams {
210 uint8_t wmep_acm;
211 uint8_t wmep_aifsn;
212 uint8_t wmep_logcwmin; /* log2(cwmin) */
213 uint8_t wmep_logcwmax; /* log2(cwmax) */
214 uint8_t wmep_txopLimit;
215 uint8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */
216 };
217 #define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5)
218 #define IEEE80211_US_TO_TXOP(_us) ((_us)>>5)
219
220 struct chanAccParams {
221 uint8_t cap_info; /* version of the current set */
222 struct wmeParams cap_wmeParams[WME_NUM_AC];
223 };
224
225 struct ieee80211_wme_state {
226 u_int wme_flags;
227 #define WME_F_AGGRMODE 0x00000001 /* STATUS: WME agressive mode */
228 u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */
229 u_int wme_hipri_switch_thresh;/* agressive mode switch thresh */
230 u_int wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */
231
232 struct wmeParams wme_params[4]; /* from assoc resp for each AC*/
233 struct chanAccParams wme_wmeChanParams; /* WME params applied to self */
234 struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */
235 struct chanAccParams wme_chanParams; /* params applied to self */
236 struct chanAccParams wme_bssChanParams; /* params bcast to stations */
237
238 int (*wme_update)(struct ieee80211com *);
239 };
240
241 void ieee80211_wme_initparams(struct ieee80211vap *);
242 void ieee80211_wme_updateparams(struct ieee80211vap *);
243 void ieee80211_wme_updateparams_locked(struct ieee80211vap *);
244
245 /*
246 * Return the WME TID from a QoS frame. If no TID
247 * is present return the index for the "non-QoS" entry.
248 */
249 static __inline uint8_t
250 ieee80211_gettid(const struct ieee80211_frame *wh)
251 {
252 uint8_t tid;
253
254 if (IEEE80211_QOS_HAS_SEQ(wh)) {
255 tid = ((const struct ieee80211_qosframe *)wh)->
256 i_qos[0] & IEEE80211_QOS_TID;
257 tid++;
258 } else
259 tid = IEEE80211_NONQOS_TID;
260 return tid;
261 }
262
263 void ieee80211_start_locked(struct ieee80211vap *);
264 void ieee80211_init(void *);
265 void ieee80211_start_all(struct ieee80211com *);
266 void ieee80211_stop_locked(struct ieee80211vap *);
267 void ieee80211_stop(struct ieee80211vap *);
268 void ieee80211_stop_all(struct ieee80211com *);
269 void ieee80211_suspend_all(struct ieee80211com *);
270 void ieee80211_resume_all(struct ieee80211com *);
271 void ieee80211_dturbo_switch(struct ieee80211vap *, int newflags);
272 void ieee80211_swbmiss(void *arg);
273 void ieee80211_beacon_miss(struct ieee80211com *);
274 int ieee80211_new_state(struct ieee80211vap *, enum ieee80211_state, int);
275 void ieee80211_print_essid(const uint8_t *, int);
276 void ieee80211_dump_pkt(struct ieee80211com *,
277 const uint8_t *, int, int, int);
278
279 extern const char *ieee80211_opmode_name[];
280 extern const char *ieee80211_state_name[IEEE80211_S_MAX];
281 extern const char *ieee80211_wme_acnames[];
282
283 /*
284 * Beacon frames constructed by ieee80211_beacon_alloc
285 * have the following structure filled in so drivers
286 * can update the frame later w/ minimal overhead.
287 */
288 struct ieee80211_beacon_offsets {
289 uint8_t bo_flags[4]; /* update/state flags */
290 uint16_t *bo_caps; /* capabilities */
291 uint8_t *bo_cfp; /* start of CFParms element */
292 uint8_t *bo_tim; /* start of atim/dtim */
293 uint8_t *bo_wme; /* start of WME parameters */
294 uint8_t *bo_tim_trailer;/* start of fixed-size trailer */
295 uint16_t bo_tim_len; /* atim/dtim length in bytes */
296 uint16_t bo_tim_trailer_len;/* tim trailer length in bytes */
297 uint8_t *bo_erp; /* start of ERP element */
298 uint8_t *bo_htinfo; /* start of HT info element */
299 uint8_t *bo_appie; /* start of AppIE element */
300 uint16_t bo_appie_len; /* AppIE length in bytes */
301 uint16_t bo_csa_trailer_len;;
302 uint8_t *bo_csa; /* start of CSA element */
303 };
304 struct mbuf *ieee80211_beacon_alloc(struct ieee80211_node *,
305 struct ieee80211_beacon_offsets *);
306
307 /*
308 * Beacon frame updates are signaled through calls to iv_update_beacon
309 * with one of the IEEE80211_BEACON_* tokens defined below. For devices
310 * that construct beacon frames on the host this can trigger a rebuild
311 * or defer the processing. For devices that offload beacon frame
312 * handling this callback can be used to signal a rebuild. The bo_flags
313 * array in the ieee80211_beacon_offsets structure is intended to record
314 * deferred processing requirements; ieee80211_beacon_update uses the
315 * state to optimize work. Since this structure is owned by the driver
316 * and not visible to the 802.11 layer drivers must supply an iv_update_beacon
317 * callback that marks the flag bits and schedules (as necessary) an update.
318 */
319 enum {
320 IEEE80211_BEACON_CAPS = 0, /* capabilities */
321 IEEE80211_BEACON_TIM = 1, /* DTIM/ATIM */
322 IEEE80211_BEACON_WME = 2,
323 IEEE80211_BEACON_ERP = 3, /* Extended Rate Phy */
324 IEEE80211_BEACON_HTINFO = 4, /* HT Information */
325 IEEE80211_BEACON_APPIE = 5, /* Application IE's */
326 IEEE80211_BEACON_CFP = 6, /* CFParms */
327 IEEE80211_BEACON_CSA = 7, /* Channel Switch Announcement */
328 };
329 int ieee80211_beacon_update(struct ieee80211_node *,
330 struct ieee80211_beacon_offsets *, struct mbuf *, int mcast);
331
332 void ieee80211_csa_startswitch(struct ieee80211com *,
333 struct ieee80211_channel *, int mode, int count);
334 void ieee80211_csa_completeswitch(struct ieee80211com *);
335 void ieee80211_cac_completeswitch(struct ieee80211vap *);
336
337 /*
338 * Notification methods called from the 802.11 state machine.
339 * Note that while these are defined here, their implementation
340 * is OS-specific.
341 */
342 void ieee80211_notify_node_join(struct ieee80211_node *, int newassoc);
343 void ieee80211_notify_node_leave(struct ieee80211_node *);
344 void ieee80211_notify_scan_done(struct ieee80211vap *);
345 void ieee80211_notify_wds_discover(struct ieee80211_node *);
346 void ieee80211_notify_csa(struct ieee80211com *,
347 const struct ieee80211_channel *, int mode, int count);
348 void ieee80211_notify_radar(struct ieee80211com *,
349 const struct ieee80211_channel *);
350 enum ieee80211_notify_cac_event {
351 IEEE80211_NOTIFY_CAC_START = 0, /* CAC timer started */
352 IEEE80211_NOTIFY_CAC_STOP = 1, /* CAC intentionally stopped */
353 IEEE80211_NOTIFY_CAC_RADAR = 2, /* CAC stopped due to radar detectio */
354 IEEE80211_NOTIFY_CAC_EXPIRE = 3, /* CAC expired w/o radar */
355 };
356 void ieee80211_notify_cac(struct ieee80211com *,
357 const struct ieee80211_channel *,
358 enum ieee80211_notify_cac_event);
359 void ieee80211_notify_node_deauth(struct ieee80211_node *);
360 void ieee80211_notify_node_auth(struct ieee80211_node *);
361 void ieee80211_notify_country(struct ieee80211vap *, const uint8_t [],
362 const uint8_t cc[2]);
363 void ieee80211_notify_radio(struct ieee80211com *, int);
364 #endif /* _NET80211_IEEE80211_PROTO_H_ */
365
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