1 /* $OpenBSD: ieee80211_node.h,v 1.94 2022/03/20 12:01:58 stsp Exp $ */
2 /* $NetBSD: ieee80211_node.h,v 1.9 2004/04/30 22:57:32 dyoung Exp $ */
3
4 /*-
5 * Copyright (c) 2001 Atsushi Onoe
6 * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * $FreeBSD: src/sys/net80211/ieee80211_node.h,v 1.10 2004/04/05 22:10:26 sam Exp $
32 */
33 #ifndef _NET80211_IEEE80211_NODE_H_
34 #define _NET80211_IEEE80211_NODE_H_
35
36 #include <sys/tree.h>
37
38 #define IEEE80211_PSCAN_WAIT 5 /* passive scan wait */
39 #define IEEE80211_TRANS_WAIT 5 /* transition wait */
40 #define IEEE80211_INACT_WAIT 5 /* inactivity timer interval */
41 #define IEEE80211_INACT_MAX (300/IEEE80211_INACT_WAIT)
42 #define IEEE80211_CACHE_SIZE 512
43 #define IEEE80211_CACHE_WAIT 30
44 #define IEEE80211_INACT_SCAN 10 /* for station mode */
45
46 struct ieee80211_rateset {
47 u_int8_t rs_nrates;
48 u_int8_t rs_rates[IEEE80211_RATE_MAXSIZE];
49 };
50
51 extern const struct ieee80211_rateset ieee80211_std_rateset_11a;
52 extern const struct ieee80211_rateset ieee80211_std_rateset_11b;
53 extern const struct ieee80211_rateset ieee80211_std_rateset_11g;
54
55 /* Index into ieee80211_std_rateset_11n[] array. */
56 #define IEEE80211_HT_RATESET_SISO 0
57 #define IEEE80211_HT_RATESET_SISO_SGI 1
58 #define IEEE80211_HT_RATESET_MIMO2 2
59 #define IEEE80211_HT_RATESET_MIMO2_SGI 3
60 #define IEEE80211_HT_RATESET_MIMO3 4
61 #define IEEE80211_HT_RATESET_MIMO3_SGI 5
62 #define IEEE80211_HT_RATESET_MIMO4 6
63 #define IEEE80211_HT_RATESET_MIMO4_SGI 7
64 #define IEEE80211_HT_RATESET_SISO_40 8
65 #define IEEE80211_HT_RATESET_SISO_SGI40 9
66 #define IEEE80211_HT_RATESET_MIMO2_40 10
67 #define IEEE80211_HT_RATESET_MIMO2_SGI40 11
68 #define IEEE80211_HT_RATESET_MIMO3_40 12
69 #define IEEE80211_HT_RATESET_MIMO3_SGI40 13
70 #define IEEE80211_HT_RATESET_MIMO4_40 14
71 #define IEEE80211_HT_RATESET_MIMO4_SGI40 15
72 #define IEEE80211_HT_NUM_RATESETS 16
73
74 /* Maximum number of rates in a HT rateset. */
75 #define IEEE80211_HT_RATESET_MAX_NRATES 8
76
77 /* Number of MCS indices represented by struct ieee80211_ht_rateset. */
78 #define IEEE80211_HT_RATESET_NUM_MCS 32
79
80 struct ieee80211_ht_rateset {
81 uint32_t nrates;
82 uint32_t rates[IEEE80211_HT_RATESET_MAX_NRATES]; /* 500 kbit/s units */
83
84 /*
85 * This bitmask can only express MCS 0 - MCS 31.
86 * IEEE 802.11 defined 77 HT MCS in total but common hardware
87 * implementations tend to support MCS index 0 through 31 only.
88 */
89 uint32_t mcs_mask;
90
91 /* Range of MCS indices represented in this rateset. */
92 int min_mcs;
93 int max_mcs;
94
95 int chan40;
96 int sgi;
97 };
98
99 extern const struct ieee80211_ht_rateset ieee80211_std_ratesets_11n[];
100
101 /* Index into ieee80211_std_rateset_11ac[] array. */
102 #define IEEE80211_VHT_RATESET_SISO 0
103 #define IEEE80211_VHT_RATESET_SISO_SGI 1
104 #define IEEE80211_VHT_RATESET_MIMO2 2
105 #define IEEE80211_VHT_RATESET_MIMO2_SGI 3
106 #define IEEE80211_VHT_RATESET_SISO_40 4
107 #define IEEE80211_VHT_RATESET_SISO_40_SGI 5
108 #define IEEE80211_VHT_RATESET_MIMO2_40 6
109 #define IEEE80211_VHT_RATESET_MIMO2_40_SGI 7
110 #define IEEE80211_VHT_RATESET_SISO_80 8
111 #define IEEE80211_VHT_RATESET_SISO_80_SGI 9
112 #define IEEE80211_VHT_RATESET_MIMO2_80 10
113 #define IEEE80211_VHT_RATESET_MIMO2_80_SGI 11
114 #define IEEE80211_VHT_NUM_RATESETS 12
115
116 /* Maximum number of rates in a VHT rateset. */
117 #define IEEE80211_VHT_RATESET_MAX_NRATES 10
118
119 struct ieee80211_vht_rateset {
120 int idx; /* This rateset's index in ieee80211_std_rateset_11ac[]. */
121
122 uint32_t nrates;
123 uint32_t rates[IEEE80211_VHT_RATESET_MAX_NRATES]; /* 500 kbit/s units */
124
125 /* Number of spatial streams used by rates in this rateset. */
126 int num_ss;
127
128 int chan40;
129 int chan80;
130 int sgi;
131 };
132
133 extern const struct ieee80211_vht_rateset ieee80211_std_ratesets_11ac[];
134
135 enum ieee80211_node_state {
136 IEEE80211_STA_CACHE, /* cached node */
137 IEEE80211_STA_BSS, /* ic->ic_bss, the network we joined */
138 IEEE80211_STA_AUTH, /* successfully authenticated */
139 IEEE80211_STA_ASSOC, /* successfully associated */
140 IEEE80211_STA_COLLECT /* This node remains in the cache while
141 * the driver sends a de-auth message;
142 * afterward it should be freed to make room
143 * for a new node.
144 */
145 };
146
147 #define ieee80211_node_newstate(__ni, __state) \
148 do { \
149 (__ni)->ni_state = (__state); \
150 } while (0)
151
152 enum ieee80211_node_psstate {
153 IEEE80211_PS_AWAKE,
154 IEEE80211_PS_DOZE
155 };
156
157 #define IEEE80211_PS_MAX_QUEUE 50 /* maximum saved packets */
158
159 /* Authenticator state machine: 4-Way Handshake (see 8.5.6.1.1) */
160 enum {
161 RSNA_INITIALIZE,
162 RSNA_AUTHENTICATION,
163 RSNA_AUTHENTICATION_2,
164 RSNA_INITPMK,
165 RSNA_INITPSK,
166 RSNA_PTKSTART,
167 RSNA_PTKCALCNEGOTIATING,
168 RSNA_PTKCALCNEGOTIATING_2,
169 RSNA_PTKINITNEGOTIATING,
170 RSNA_PTKINITDONE,
171 RSNA_DISCONNECT,
172 RSNA_DISCONNECTED
173 };
174
175 /* Authenticator state machine: Group Key Handshake (see 8.5.6.1.2) */
176 enum {
177 RSNA_IDLE,
178 RSNA_REKEYNEGOTIATING,
179 RSNA_REKEYESTABLISHED,
180 RSNA_KEYERROR
181 };
182
183 /* Supplicant state machine: 4-Way Handshake (not documented in standard) */
184 enum {
185 RSNA_SUPP_INITIALIZE, /* not expecting any messages */
186 RSNA_SUPP_PTKSTART, /* awaiting handshake message 1 */
187 RSNA_SUPP_PTKNEGOTIATING, /* got message 1 and derived PTK */
188 RSNA_SUPP_PTKDONE /* got message 3 and authenticated AP */
189 };
190
191 struct ieee80211_rxinfo {
192 u_int32_t rxi_flags;
193 u_int32_t rxi_tstamp;
194 int rxi_rssi;
195 uint8_t rxi_chan;
196 };
197 #define IEEE80211_RXI_HWDEC 0x00000001
198 #define IEEE80211_RXI_AMPDU_DONE 0x00000002
199 #define IEEE80211_RXI_HWDEC_SAME_PN 0x00000004
200 #define IEEE80211_RXI_SAME_SEQ 0x00000008
201
202 /* Block Acknowledgement Record */
203 struct ieee80211_tx_ba {
204 struct ieee80211_node *ba_ni; /* backpointer for callbacks */
205 struct timeout ba_to;
206 int ba_timeout_val;
207 int ba_state;
208 #define IEEE80211_BA_INIT 0
209 #define IEEE80211_BA_REQUESTED 1
210 #define IEEE80211_BA_AGREED 2
211
212 /* ADDBA parameter set field for this BA agreement. */
213 u_int16_t ba_params;
214
215 /* These values are IEEE802.11 frame sequence numbers (0x0-0xfff) */
216 u_int16_t ba_winstart;
217 u_int16_t ba_winend;
218
219 /* Number of A-MPDU subframes in reorder buffer. */
220 u_int16_t ba_winsize;
221 #define IEEE80211_BA_MAX_WINSZ 64 /* corresponds to maximum ADDBA BUFSZ */
222
223 u_int8_t ba_token;
224
225 /* Bitmap for ACK'd frames in the current BA window. */
226 uint64_t ba_bitmap;
227 };
228
229 struct ieee80211_rx_ba {
230 struct ieee80211_node *ba_ni; /* backpointer for callbacks */
231 struct {
232 struct mbuf *m;
233 struct ieee80211_rxinfo rxi;
234 } *ba_buf;
235 struct timeout ba_to;
236 int ba_timeout_val;
237 int ba_state;
238 u_int16_t ba_params;
239 u_int16_t ba_winstart;
240 u_int16_t ba_winend;
241 u_int16_t ba_winsize;
242 u_int16_t ba_head;
243 struct timeout ba_gap_to;
244 #define IEEE80211_BA_GAP_TIMEOUT 300 /* msec */
245
246 /*
247 * Counter for frames forced to wait in the reordering buffer
248 * due to a leading gap caused by one or more missing frames.
249 */
250 int ba_gapwait;
251
252 /* Counter for consecutive frames which missed the BA window. */
253 int ba_winmiss;
254 /* Sequence number of previous frame which missed the BA window. */
255 uint16_t ba_missedsn;
256 /* Window moves forward after this many frames have missed it. */
257 #define IEEE80211_BA_MAX_WINMISS 8
258
259 uint8_t ba_token;
260 };
261
262 /*
263 * Node specific information. Note that drivers are expected
264 * to derive from this structure to add device-specific per-node
265 * state. This is done by overriding the ic_node_* methods in
266 * the ieee80211com structure.
267 */
268 struct ieee80211_node {
269 RBT_ENTRY(ieee80211_node) ni_node;
270
271 struct ieee80211com *ni_ic; /* back-pointer */
272
273 u_int ni_refcnt;
274 u_int ni_scangen; /* gen# for timeout scan */
275
276 /* hardware */
277 u_int32_t ni_rstamp; /* recv timestamp */
278 u_int8_t ni_rssi; /* recv ssi */
279
280 /* header */
281 u_int8_t ni_macaddr[IEEE80211_ADDR_LEN];
282 u_int8_t ni_bssid[IEEE80211_ADDR_LEN];
283
284 /* beacon, probe response */
285 u_int8_t ni_tstamp[8]; /* from last rcv'd beacon */
286 u_int16_t ni_intval; /* beacon interval */
287 u_int16_t ni_capinfo; /* capabilities */
288 u_int8_t ni_esslen;
289 u_int8_t ni_essid[IEEE80211_NWID_LEN];
290 struct ieee80211_rateset ni_rates; /* negotiated rate set */
291 u_int8_t *ni_country; /* country information XXX */
292 struct ieee80211_channel *ni_chan;
293 u_int8_t ni_erp; /* 11g only */
294
295 /* DTIM and contention free period (CFP) */
296 u_int8_t ni_dtimcount;
297 u_int8_t ni_dtimperiod;
298 #ifdef notyet
299 u_int8_t ni_cfpperiod; /* # of DTIMs between CFPs */
300 u_int16_t ni_cfpduremain; /* remaining cfp duration */
301 u_int16_t ni_cfpmaxduration;/* max CFP duration in TU */
302 u_int16_t ni_nextdtim; /* time to next DTIM */
303 u_int16_t ni_timoffset;
304 #endif
305
306 /* power saving mode */
307 u_int8_t ni_pwrsave;
308 struct mbuf_queue ni_savedq; /* packets queued for pspoll */
309
310 /* RSN */
311 struct timeout ni_eapol_to;
312 u_int ni_rsn_state;
313 u_int ni_rsn_supp_state;
314 u_int ni_rsn_gstate;
315 u_int ni_rsn_retries;
316 u_int ni_supported_rsnprotos;
317 u_int ni_rsnprotos;
318 u_int ni_supported_rsnakms;
319 u_int ni_rsnakms;
320 u_int ni_rsnciphers;
321 enum ieee80211_cipher ni_rsngroupcipher;
322 enum ieee80211_cipher ni_rsngroupmgmtcipher;
323 u_int16_t ni_rsncaps;
324 enum ieee80211_cipher ni_rsncipher;
325 u_int8_t ni_nonce[EAPOL_KEY_NONCE_LEN];
326 u_int8_t ni_pmk[IEEE80211_PMK_LEN];
327 u_int8_t ni_pmkid[IEEE80211_PMKID_LEN];
328 u_int64_t ni_replaycnt;
329 u_int8_t ni_replaycnt_ok;
330 u_int64_t ni_reqreplaycnt;
331 u_int8_t ni_reqreplaycnt_ok;
332 u_int8_t *ni_rsnie;
333 struct ieee80211_key ni_pairwise_key;
334 struct ieee80211_ptk ni_ptk;
335 u_int8_t ni_key_count;
336 int ni_port_valid;
337
338 /* SA Query */
339 u_int16_t ni_sa_query_trid;
340 struct timeout ni_sa_query_to;
341 int ni_sa_query_count;
342
343 /* HT capabilities */
344 uint16_t ni_htcaps;
345 uint8_t ni_ampdu_param;
346 uint8_t ni_rxmcs[howmany(80,NBBY)];
347 uint16_t ni_max_rxrate; /* in Mb/s, 0 <= rate <= 1023 */
348 uint8_t ni_tx_mcs_set;
349 uint16_t ni_htxcaps;
350 uint32_t ni_txbfcaps;
351 uint8_t ni_aselcaps;
352
353 /* HT operation */
354 uint8_t ni_primary_chan; /* XXX corresponds to ni_chan */
355 uint8_t ni_htop0;
356 uint16_t ni_htop1;
357 uint16_t ni_htop2;
358 uint8_t ni_basic_mcs[howmany(128,NBBY)];
359
360 /* VHT capabilities */
361 uint32_t ni_vhtcaps;
362 uint16_t ni_vht_rxmcs;
363 uint16_t ni_vht_rx_max_lgi_mbit_s;
364 uint16_t ni_vht_txmcs;
365 uint16_t ni_vht_tx_max_lgi_mbit_s;
366
367 /* VHT operation */
368 uint8_t ni_vht_chan_width;
369 uint8_t ni_vht_chan_center_freq_idx0;
370 uint8_t ni_vht_chan_center_freq_idx1;
371 uint16_t ni_vht_basic_mcs;
372
373 /* Timeout handlers which trigger Tx Block Ack negotiation. */
374 struct timeout ni_addba_req_to[IEEE80211_NUM_TID];
375 int ni_addba_req_intval[IEEE80211_NUM_TID];
376 #define IEEE80211_ADDBA_REQ_INTVAL_MAX 30 /* in seconds */
377
378 /* Block Ack records */
379 struct ieee80211_tx_ba ni_tx_ba[IEEE80211_NUM_TID];
380 struct ieee80211_rx_ba ni_rx_ba[IEEE80211_NUM_TID];
381
382 int ni_txmcs; /* current MCS used for TX */
383 int ni_vht_ss; /* VHT # spatial streams */
384
385 /* others */
386 u_int16_t ni_associd; /* assoc response */
387 u_int16_t ni_txseq; /* seq to be transmitted */
388 u_int16_t ni_rxseq; /* seq previous received */
389 u_int16_t ni_qos_txseqs[IEEE80211_NUM_TID];
390 u_int16_t ni_qos_rxseqs[IEEE80211_NUM_TID];
391 int ni_fails; /* failure count to associate */
392 uint32_t ni_assoc_fail; /* assoc failure reasons */
393 #define IEEE80211_NODE_ASSOCFAIL_CHAN 0x01
394 #define IEEE80211_NODE_ASSOCFAIL_IBSS 0x02
395 #define IEEE80211_NODE_ASSOCFAIL_PRIVACY 0x04
396 #define IEEE80211_NODE_ASSOCFAIL_BASIC_RATE 0x08
397 #define IEEE80211_NODE_ASSOCFAIL_ESSID 0x10
398 #define IEEE80211_NODE_ASSOCFAIL_BSSID 0x20
399 #define IEEE80211_NODE_ASSOCFAIL_WPA_PROTO 0x40
400 #define IEEE80211_NODE_ASSOCFAIL_WPA_KEY 0x80
401
402 int ni_inact; /* inactivity mark count */
403 int ni_txrate; /* index to ni_rates[] */
404 int ni_state;
405
406 u_int32_t ni_flags; /* special-purpose state */
407 #define IEEE80211_NODE_ERP 0x0001
408 #define IEEE80211_NODE_QOS 0x0002
409 #define IEEE80211_NODE_REKEY 0x0004 /* GTK rekeying in progress */
410 #define IEEE80211_NODE_RXPROT 0x0008 /* RX protection ON */
411 #define IEEE80211_NODE_TXPROT 0x0010 /* TX protection ON */
412 #define IEEE80211_NODE_TXRXPROT \
413 (IEEE80211_NODE_TXPROT | IEEE80211_NODE_RXPROT)
414 #define IEEE80211_NODE_RXMGMTPROT 0x0020 /* RX MMPDU protection ON */
415 #define IEEE80211_NODE_TXMGMTPROT 0x0040 /* TX MMPDU protection ON */
416 #define IEEE80211_NODE_MFP 0x0080 /* MFP negotiated */
417 #define IEEE80211_NODE_PMK 0x0100 /* ni_pmk set */
418 #define IEEE80211_NODE_PMKID 0x0200 /* ni_pmkid set */
419 #define IEEE80211_NODE_HT 0x0400 /* HT negotiated */
420 #define IEEE80211_NODE_SA_QUERY 0x0800 /* SA Query in progress */
421 #define IEEE80211_NODE_SA_QUERY_FAILED 0x1000 /* last SA Query failed */
422 #define IEEE80211_NODE_RSN_NEW_PTK 0x2000 /* expecting a new PTK */
423 #define IEEE80211_NODE_HT_SGI20 0x4000 /* SGI on 20 MHz negotiated */
424 #define IEEE80211_NODE_HT_SGI40 0x8000 /* SGI on 40 MHz negotiated */
425 #define IEEE80211_NODE_VHT 0x10000 /* VHT negotiated */
426 #define IEEE80211_NODE_HTCAP 0x20000 /* claims to support HT */
427 #define IEEE80211_NODE_VHTCAP 0x40000 /* claims to support VHT */
428 #define IEEE80211_NODE_VHT_SGI80 0x80000 /* SGI on 80 MHz negotiated */
429 #define IEEE80211_NODE_VHT_SGI160 0x100000 /* SGI on 160 MHz negotiated */
430
431 /* If not NULL, this function gets called when ni_refcnt hits zero. */
432 void (*ni_unref_cb)(struct ieee80211com *,
433 struct ieee80211_node *);
434 void * ni_unref_arg;
435 size_t ni_unref_arg_size;
436 };
437
438 RBT_HEAD(ieee80211_tree, ieee80211_node);
439
440 struct ieee80211_ess_rbt {
441 RBT_ENTRY(ieee80211_ess_rbt) ess_rbt;
442 u_int8_t esslen;
443 u_int8_t essid[IEEE80211_NWID_LEN];
444 struct ieee80211_node *ni2;
445 struct ieee80211_node *ni5;
446 struct ieee80211_node *ni;
447 };
448
449 RBT_HEAD(ieee80211_ess_tree, ieee80211_ess_rbt);
450
451 static inline void
ieee80211_node_incref(struct ieee80211_node * ni)452 ieee80211_node_incref(struct ieee80211_node *ni)
453 {
454 int s;
455
456 s = splnet();
457 ni->ni_refcnt++;
458 splx(s);
459 }
460
461 static inline u_int
ieee80211_node_decref(struct ieee80211_node * ni)462 ieee80211_node_decref(struct ieee80211_node *ni)
463 {
464 u_int refcnt;
465 int s;
466
467 s = splnet();
468 refcnt = --ni->ni_refcnt;
469 splx(s);
470 return refcnt;
471 }
472
473 static inline struct ieee80211_node *
ieee80211_ref_node(struct ieee80211_node * ni)474 ieee80211_ref_node(struct ieee80211_node *ni)
475 {
476 ieee80211_node_incref(ni);
477 return ni;
478 }
479
480 static inline void
ieee80211_unref_node(struct ieee80211_node ** ni)481 ieee80211_unref_node(struct ieee80211_node **ni)
482 {
483 ieee80211_node_decref(*ni);
484 *ni = NULL; /* guard against use */
485 }
486
487 /*
488 * Check if the peer supports HT.
489 * Require a HT capabilities IE and at least one of the mandatory MCS.
490 * MCS 0-7 are mandatory but some APs have particular MCS disabled.
491 */
492 static inline int
ieee80211_node_supports_ht(struct ieee80211_node * ni)493 ieee80211_node_supports_ht(struct ieee80211_node *ni)
494 {
495 return ((ni->ni_flags & IEEE80211_NODE_HTCAP) &&
496 ni->ni_rxmcs[0] & 0xff);
497 }
498
499 /* Check if the peer supports HT short guard interval (SGI) on 20 MHz. */
500 static inline int
ieee80211_node_supports_ht_sgi20(struct ieee80211_node * ni)501 ieee80211_node_supports_ht_sgi20(struct ieee80211_node *ni)
502 {
503 return ieee80211_node_supports_ht(ni) &&
504 (ni->ni_htcaps & IEEE80211_HTCAP_SGI20);
505 }
506
507 /* Check if the peer supports HT short guard interval (SGI) on 40 MHz. */
508 static inline int
ieee80211_node_supports_ht_sgi40(struct ieee80211_node * ni)509 ieee80211_node_supports_ht_sgi40(struct ieee80211_node *ni)
510 {
511 return ieee80211_node_supports_ht(ni) &&
512 (ni->ni_htcaps & IEEE80211_HTCAP_SGI40);
513 }
514
515 /* Check if the peer can receive frames sent on a 40 MHz channel. */
516 static inline int
ieee80211_node_supports_ht_chan40(struct ieee80211_node * ni)517 ieee80211_node_supports_ht_chan40(struct ieee80211_node *ni)
518 {
519 return (ieee80211_node_supports_ht(ni) &&
520 (ni->ni_htcaps & IEEE80211_HTCAP_CBW20_40) &&
521 (ni->ni_htop0 & IEEE80211_HTOP0_CHW));
522 }
523
524 /*
525 * Check if the peer supports VHT.
526 * Require a VHT capabilities IE and support for VHT MCS with a single
527 * spatial stream.
528 */
529 static inline int
ieee80211_node_supports_vht(struct ieee80211_node * ni)530 ieee80211_node_supports_vht(struct ieee80211_node *ni)
531 {
532 uint16_t rx_mcs;
533
534 rx_mcs = (ni->ni_vht_rxmcs & IEEE80211_VHT_MCS_FOR_SS_MASK(1)) >>
535 IEEE80211_VHT_MCS_FOR_SS_SHIFT(1);
536
537 return ((ni->ni_flags & IEEE80211_NODE_VHTCAP) &&
538 rx_mcs != IEEE80211_VHT_MCS_SS_NOT_SUPP);
539 }
540
541 /* Check if the peer supports VHT short guard interval (SGI) on 80 MHz. */
542 static inline int
ieee80211_node_supports_vht_sgi80(struct ieee80211_node * ni)543 ieee80211_node_supports_vht_sgi80(struct ieee80211_node *ni)
544 {
545 return ieee80211_node_supports_vht(ni) &&
546 (ni->ni_vhtcaps & IEEE80211_VHTCAP_SGI80);
547 }
548
549 /* Check if the peer supports VHT short guard interval (SGI) on 160 MHz. */
550 static inline int
ieee80211_node_supports_vht_sgi160(struct ieee80211_node * ni)551 ieee80211_node_supports_vht_sgi160(struct ieee80211_node *ni)
552 {
553 return ieee80211_node_supports_vht(ni) &&
554 (ni->ni_vhtcaps & IEEE80211_VHTCAP_SGI160);
555 }
556
557 /* Check if the peer can receive frames sent on an 80 MHz channel. */
558 static inline int
ieee80211_node_supports_vht_chan80(struct ieee80211_node * ni)559 ieee80211_node_supports_vht_chan80(struct ieee80211_node *ni)
560 {
561 uint8_t cap_chan_width, op_chan_width;
562
563 if (!ieee80211_node_supports_vht(ni))
564 return 0;
565
566 cap_chan_width = (ni->ni_vhtcaps & IEEE80211_VHTCAP_CHAN_WIDTH_MASK) >>
567 IEEE80211_VHTCAP_CHAN_WIDTH_SHIFT;
568 if (cap_chan_width != IEEE80211_VHTCAP_CHAN_WIDTH_80 &&
569 cap_chan_width != IEEE80211_VHTCAP_CHAN_WIDTH_160 &&
570 cap_chan_width != IEEE80211_VHTCAP_CHAN_WIDTH_160_8080)
571 return 0;
572
573 op_chan_width = (ni->ni_vht_chan_width &
574 IEEE80211_VHTOP0_CHAN_WIDTH_MASK) >>
575 IEEE80211_VHTOP0_CHAN_WIDTH_SHIFT;
576
577 return (op_chan_width == IEEE80211_VHTOP0_CHAN_WIDTH_80 ||
578 op_chan_width == IEEE80211_VHTOP0_CHAN_WIDTH_160 ||
579 op_chan_width == IEEE80211_VHTOP0_CHAN_WIDTH_8080);
580 }
581
582 /* Check if the peer can receive frames sent on a 160 MHz channel. */
583 static inline int
ieee80211_node_supports_vht_chan160(struct ieee80211_node * ni)584 ieee80211_node_supports_vht_chan160(struct ieee80211_node *ni)
585 {
586 uint8_t cap_chan_width, op_chan_width;
587
588 if (!ieee80211_node_supports_vht(ni))
589 return 0;
590
591 cap_chan_width = (ni->ni_vhtcaps & IEEE80211_VHTCAP_CHAN_WIDTH_MASK) >>
592 IEEE80211_VHTCAP_CHAN_WIDTH_SHIFT;
593 if (cap_chan_width != IEEE80211_VHTCAP_CHAN_WIDTH_160)
594 return 0;
595
596 op_chan_width = (ni->ni_vht_chan_width &
597 IEEE80211_VHTOP0_CHAN_WIDTH_MASK) >>
598 IEEE80211_VHTOP0_CHAN_WIDTH_SHIFT;
599
600 return (op_chan_width == IEEE80211_VHTOP0_CHAN_WIDTH_160);
601 }
602
603 struct ieee80211com;
604
605 typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
606
607 void ieee80211_node_attach(struct ifnet *);
608 void ieee80211_node_lateattach(struct ifnet *);
609 void ieee80211_node_detach(struct ifnet *);
610
611 void ieee80211_begin_scan(struct ifnet *);
612 void ieee80211_next_scan(struct ifnet *);
613 void ieee80211_end_scan(struct ifnet *);
614 void ieee80211_reset_scan(struct ifnet *);
615 struct ieee80211_node *ieee80211_alloc_node(struct ieee80211com *,
616 const u_int8_t *);
617 struct ieee80211_node *ieee80211_dup_bss(struct ieee80211com *,
618 const u_int8_t *);
619 struct ieee80211_node *ieee80211_find_node(struct ieee80211com *,
620 const u_int8_t *);
621 void ieee80211_node_tx_ba_clear(struct ieee80211_node *, int);
622 void ieee80211_ba_del(struct ieee80211_node *);
623 struct ieee80211_node *ieee80211_find_rxnode(struct ieee80211com *,
624 const struct ieee80211_frame *);
625 struct ieee80211_node *ieee80211_find_txnode(struct ieee80211com *,
626 const u_int8_t *);
627 void ieee80211_release_node(struct ieee80211com *,
628 struct ieee80211_node *);
629 void ieee80211_node_cleanup(struct ieee80211com *, struct ieee80211_node *);
630 void ieee80211_free_allnodes(struct ieee80211com *, int);
631 void ieee80211_iterate_nodes(struct ieee80211com *,
632 ieee80211_iter_func *, void *);
633 void ieee80211_clean_cached(struct ieee80211com *);
634 void ieee80211_clean_nodes(struct ieee80211com *, int);
635 void ieee80211_setup_htcaps(struct ieee80211_node *, const uint8_t *,
636 uint8_t);
637 void ieee80211_clear_htcaps(struct ieee80211_node *);
638 int ieee80211_setup_htop(struct ieee80211_node *, const uint8_t *,
639 uint8_t, int);
640 void ieee80211_setup_vhtcaps(struct ieee80211_node *, const uint8_t *,
641 uint8_t);
642 void ieee80211_clear_vhtcaps(struct ieee80211_node *);
643 int ieee80211_setup_vhtop(struct ieee80211_node *, const uint8_t *,
644 uint8_t, int);
645 int ieee80211_setup_rates(struct ieee80211com *,
646 struct ieee80211_node *, const u_int8_t *, const u_int8_t *, int);
647 void ieee80211_node_trigger_addba_req(struct ieee80211_node *, int);
648 int ieee80211_iserp_sta(const struct ieee80211_node *);
649 void ieee80211_count_longslotsta(void *, struct ieee80211_node *);
650 void ieee80211_count_nonerpsta(void *, struct ieee80211_node *);
651 void ieee80211_count_pssta(void *, struct ieee80211_node *);
652 void ieee80211_count_rekeysta(void *, struct ieee80211_node *);
653 void ieee80211_node_join(struct ieee80211com *,
654 struct ieee80211_node *, int);
655 void ieee80211_node_leave(struct ieee80211com *,
656 struct ieee80211_node *);
657 int ieee80211_match_bss(struct ieee80211com *, struct ieee80211_node *, int);
658 void ieee80211_node_tx_stopped(struct ieee80211com *, struct ieee80211_node *);
659 struct ieee80211_node *ieee80211_node_choose_bss(struct ieee80211com *, int,
660 struct ieee80211_node **);
661 void ieee80211_node_join_bss(struct ieee80211com *, struct ieee80211_node *);
662 void ieee80211_create_ibss(struct ieee80211com* ,
663 struct ieee80211_channel *);
664 void ieee80211_notify_dtim(struct ieee80211com *);
665 void ieee80211_set_tim(struct ieee80211com *, int, int);
666 void ieee80211_free_node(struct ieee80211com *, struct ieee80211_node *);
667
668 int ieee80211_node_cmp(const struct ieee80211_node *,
669 const struct ieee80211_node *);
670 int ieee80211_ess_cmp(const struct ieee80211_ess_rbt *,
671 const struct ieee80211_ess_rbt *);
672 RBT_PROTOTYPE(ieee80211_tree, ieee80211_node, ni_node, ieee80211_node_cmp);
673 RBT_PROTOTYPE(ieee80211_ess_tree, ieee80211_ess_rbt, ess_rbt, ieee80211_ess_cmp);
674
675 #endif /* _NET80211_IEEE80211_NODE_H_ */
676