ieee80211_proto.c revision 1.23 1 /* $NetBSD: ieee80211_proto.c,v 1.23 2005/11/18 16:40:09 skrll Exp $ */
2 /*-
3 * Copyright (c) 2001 Atsushi Onoe
4 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * Alternatively, this software may be distributed under the terms of the
19 * GNU General Public License ("GPL") version 2 as published by the Free
20 * Software Foundation.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35 #ifdef __FreeBSD__
36 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_proto.c,v 1.23 2005/08/10 16:22:29 sam Exp $");
37 #endif
38 #ifdef __NetBSD__
39 __KERNEL_RCSID(0, "$NetBSD: ieee80211_proto.c,v 1.23 2005/11/18 16:40:09 skrll Exp $");
40 #endif
41
42 /*
43 * IEEE 802.11 protocol support.
44 */
45
46 #include "opt_inet.h"
47
48 #include <sys/param.h>
49 #include <sys/kernel.h>
50 #include <sys/systm.h>
51
52 #include <sys/socket.h>
53 #include <sys/sockio.h>
54 #include <sys/endian.h>
55 #include <sys/errno.h>
56 #include <sys/proc.h>
57 #include <sys/sysctl.h>
58
59 #include <net/if.h>
60 #include <net/if_media.h>
61 #include <net/if_arp.h>
62 #include <net/if_ether.h>
63 #include <net/if_llc.h>
64
65 #include <net80211/ieee80211_netbsd.h>
66 #include <net80211/ieee80211_var.h>
67
68 #include <net/bpf.h>
69
70 #ifdef INET
71 #include <netinet/in.h>
72 #include <net/if_ether.h>
73 #endif
74
75 #include <net/route.h>
76 /* XXX tunables */
77 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
78 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
79
80 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
81
82 const char *ieee80211_mgt_subtype_name[] = {
83 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
84 "probe_req", "probe_resp", "reserved#6", "reserved#7",
85 "beacon", "atim", "disassoc", "auth",
86 "deauth", "reserved#13", "reserved#14", "reserved#15"
87 };
88 const char *ieee80211_ctl_subtype_name[] = {
89 "reserved#0", "reserved#1", "reserved#2", "reserved#3",
90 "reserved#3", "reserved#5", "reserved#6", "reserved#7",
91 "reserved#8", "reserved#9", "ps_poll", "rts",
92 "cts", "ack", "cf_end", "cf_end_ack"
93 };
94 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
95 "INIT", /* IEEE80211_S_INIT */
96 "SCAN", /* IEEE80211_S_SCAN */
97 "AUTH", /* IEEE80211_S_AUTH */
98 "ASSOC", /* IEEE80211_S_ASSOC */
99 "RUN" /* IEEE80211_S_RUN */
100 };
101 const char *ieee80211_wme_acnames[] = {
102 "WME_AC_BE",
103 "WME_AC_BK",
104 "WME_AC_VI",
105 "WME_AC_VO",
106 "WME_UPSD",
107 };
108
109 static int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int);
110
111 void
112 ieee80211_proto_attach(struct ieee80211com *ic)
113 {
114 struct ifnet *ifp = ic->ic_ifp;
115
116 /* XXX room for crypto */
117 ifp->if_hdrlen = sizeof(struct ieee80211_qosframe_addr4);
118
119 ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT;
120 ic->ic_fragthreshold = IEEE80211_FRAG_DEFAULT;
121 ic->ic_fixed_rate = IEEE80211_FIXED_RATE_NONE;
122 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
123 ic->ic_roaming = IEEE80211_ROAMING_AUTO;
124
125 ic->ic_wme.wme_hipri_switch_hysteresis =
126 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
127
128 /* protocol state change handler */
129 ic->ic_newstate = ieee80211_newstate;
130
131 /* initialize management frame handlers */
132 ic->ic_recv_mgmt = ieee80211_recv_mgmt;
133 ic->ic_send_mgmt = ieee80211_send_mgmt;
134 }
135
136 void
137 ieee80211_proto_detach(struct ieee80211com *ic)
138 {
139
140 /*
141 * This should not be needed as we detach when reseting
142 * the state but be conservative here since the
143 * authenticator may do things like spawn kernel threads.
144 */
145 if (ic->ic_auth->ia_detach)
146 ic->ic_auth->ia_detach(ic);
147
148 IF_PURGE(&ic->ic_mgtq);
149
150 /*
151 * Detach any ACL'ator.
152 */
153 if (ic->ic_acl != NULL)
154 ic->ic_acl->iac_detach(ic);
155 }
156
157 /*
158 * Simple-minded authenticator module support.
159 */
160
161 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
162 /* XXX well-known names */
163 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
164 "wlan_internal", /* IEEE80211_AUTH_NONE */
165 "wlan_internal", /* IEEE80211_AUTH_OPEN */
166 "wlan_internal", /* IEEE80211_AUTH_SHARED */
167 "wlan_xauth", /* IEEE80211_AUTH_8021X */
168 "wlan_internal", /* IEEE80211_AUTH_AUTO */
169 "wlan_xauth", /* IEEE80211_AUTH_WPA */
170 };
171 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
172
173 static const struct ieee80211_authenticator auth_internal = {
174 .ia_name = "wlan_internal",
175 .ia_attach = NULL,
176 .ia_detach = NULL,
177 .ia_node_join = NULL,
178 .ia_node_leave = NULL,
179 };
180
181 /*
182 * Setup internal authenticators once; they are never unregistered.
183 */
184 static void
185 ieee80211_auth_setup(void)
186 {
187 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
188 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
189 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
190 }
191
192 const struct ieee80211_authenticator *
193 ieee80211_authenticator_get(int auth)
194 {
195 static int initialized = 0;
196 if (!initialized) {
197 ieee80211_auth_setup();
198 initialized = 1;
199 }
200 if (auth >= IEEE80211_AUTH_MAX)
201 return NULL;
202 if (authenticators[auth] == NULL)
203 ieee80211_load_module(auth_modnames[auth]);
204 return authenticators[auth];
205 }
206
207 void
208 ieee80211_authenticator_register(int type,
209 const struct ieee80211_authenticator *auth)
210 {
211 if (type >= IEEE80211_AUTH_MAX)
212 return;
213 authenticators[type] = auth;
214 }
215
216 void
217 ieee80211_authenticator_unregister(int type)
218 {
219
220 if (type >= IEEE80211_AUTH_MAX)
221 return;
222 authenticators[type] = NULL;
223 }
224
225 /*
226 * Very simple-minded ACL module support.
227 */
228 /* XXX just one for now */
229 static const struct ieee80211_aclator *acl = NULL;
230
231 void
232 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
233 {
234 printf("wlan: %s acl policy registered\n", iac->iac_name);
235 acl = iac;
236 }
237
238 void
239 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
240 {
241 if (acl == iac)
242 acl = NULL;
243 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
244 }
245
246 const struct ieee80211_aclator *
247 ieee80211_aclator_get(const char *name)
248 {
249 if (acl == NULL)
250 ieee80211_load_module("wlan_acl");
251 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
252 }
253
254 void
255 ieee80211_print_essid(const u_int8_t *essid, int len)
256 {
257 const u_int8_t *p;
258 int i;
259
260 if (len > IEEE80211_NWID_LEN)
261 len = IEEE80211_NWID_LEN;
262 /* determine printable or not */
263 for (i = 0, p = essid; i < len; i++, p++) {
264 if (*p < ' ' || *p > 0x7e)
265 break;
266 }
267 if (i == len) {
268 printf("\"");
269 for (i = 0, p = essid; i < len; i++, p++)
270 printf("%c", *p);
271 printf("\"");
272 } else {
273 printf("0x");
274 for (i = 0, p = essid; i < len; i++, p++)
275 printf("%02x", *p);
276 }
277 }
278
279 void
280 ieee80211_dump_pkt(const u_int8_t *buf, int len, int rate, int rssi)
281 {
282 const struct ieee80211_frame *wh;
283 int i;
284
285 wh = (const struct ieee80211_frame *)buf;
286 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
287 case IEEE80211_FC1_DIR_NODS:
288 printf("NODS %s", ether_sprintf(wh->i_addr2));
289 printf("->%s", ether_sprintf(wh->i_addr1));
290 printf("(%s)", ether_sprintf(wh->i_addr3));
291 break;
292 case IEEE80211_FC1_DIR_TODS:
293 printf("TODS %s", ether_sprintf(wh->i_addr2));
294 printf("->%s", ether_sprintf(wh->i_addr3));
295 printf("(%s)", ether_sprintf(wh->i_addr1));
296 break;
297 case IEEE80211_FC1_DIR_FROMDS:
298 printf("FRDS %s", ether_sprintf(wh->i_addr3));
299 printf("->%s", ether_sprintf(wh->i_addr1));
300 printf("(%s)", ether_sprintf(wh->i_addr2));
301 break;
302 case IEEE80211_FC1_DIR_DSTODS:
303 printf("DSDS %s", ether_sprintf((const u_int8_t *)&wh[1]));
304 printf("->%s", ether_sprintf(wh->i_addr3));
305 printf("(%s", ether_sprintf(wh->i_addr2));
306 printf("->%s)", ether_sprintf(wh->i_addr1));
307 break;
308 }
309 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
310 case IEEE80211_FC0_TYPE_DATA:
311 printf(" data");
312 break;
313 case IEEE80211_FC0_TYPE_MGT:
314 printf(" %s", ieee80211_mgt_subtype_name[
315 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
316 >> IEEE80211_FC0_SUBTYPE_SHIFT]);
317 break;
318 default:
319 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
320 break;
321 }
322 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
323 printf(" WEP [IV");
324 for (i = 0; i < IEEE80211_WEP_IVLEN; i++)
325 printf(" %.02x", buf[sizeof(*wh)+i]);
326 printf(" KID %u]", buf[sizeof(*wh)+i] >> 6);
327 }
328 if (rate >= 0)
329 printf(" %dM", rate / 2);
330 if (rssi >= 0)
331 printf(" +%d", rssi);
332 printf("\n");
333 if (len > 0) {
334 for (i = 0; i < len; i++) {
335 if ((i & 1) == 0)
336 printf(" ");
337 printf("%02x", buf[i]);
338 }
339 printf("\n");
340 }
341 }
342
343 int
344 ieee80211_fix_rate(struct ieee80211_node *ni, int flags)
345 {
346 #define RV(v) ((v) & IEEE80211_RATE_VAL)
347 struct ieee80211com *ic = ni->ni_ic;
348 int i, j, ignore, error;
349 int okrate, badrate, fixedrate;
350 struct ieee80211_rateset *srs, *nrs;
351 u_int8_t r;
352
353 /*
354 * If the fixed rate check was requested but no
355 * fixed has been defined then just remove it.
356 */
357 if ((flags & IEEE80211_F_DOFRATE) &&
358 ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE)
359 flags &= ~IEEE80211_F_DOFRATE;
360 error = 0;
361 okrate = badrate = fixedrate = 0;
362 srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
363 nrs = &ni->ni_rates;
364 for (i = 0; i < nrs->rs_nrates; ) {
365 ignore = 0;
366 if (flags & IEEE80211_F_DOSORT) {
367 /*
368 * Sort rates.
369 */
370 for (j = i + 1; j < nrs->rs_nrates; j++) {
371 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
372 r = nrs->rs_rates[i];
373 nrs->rs_rates[i] = nrs->rs_rates[j];
374 nrs->rs_rates[j] = r;
375 }
376 }
377 }
378 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
379 badrate = r;
380 if (flags & IEEE80211_F_DOFRATE) {
381 /*
382 * Check any fixed rate is included.
383 */
384 if (r == RV(srs->rs_rates[ic->ic_fixed_rate]))
385 fixedrate = r;
386 }
387 if (flags & IEEE80211_F_DONEGO) {
388 /*
389 * Check against supported rates.
390 */
391 for (j = 0; j < srs->rs_nrates; j++) {
392 if (r == RV(srs->rs_rates[j])) {
393 /*
394 * Overwrite with the supported rate
395 * value so any basic rate bit is set.
396 * This insures that response we send
397 * to stations have the necessary basic
398 * rate bit set.
399 */
400 nrs->rs_rates[i] = srs->rs_rates[j];
401 break;
402 }
403 }
404 if (j == srs->rs_nrates) {
405 /*
406 * A rate in the node's rate set is not
407 * supported. If this is a basic rate and we
408 * are operating as an AP then this is an error.
409 * Otherwise we just discard/ignore the rate.
410 * Note that this is important for 11b stations
411 * when they want to associate with an 11g AP.
412 */
413 #ifndef IEEE80211_NO_HOSTAP
414 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
415 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
416 error++;
417 #endif /* !IEEE80211_NO_HOSTAP */
418 ignore++;
419 }
420 }
421 if (flags & IEEE80211_F_DODEL) {
422 /*
423 * Delete unacceptable rates.
424 */
425 if (ignore) {
426 nrs->rs_nrates--;
427 for (j = i; j < nrs->rs_nrates; j++)
428 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
429 nrs->rs_rates[j] = 0;
430 continue;
431 }
432 }
433 if (!ignore) {
434 okrate = nrs->rs_rates[i];
435 ni->ni_txrate = i;
436 }
437 i++;
438 }
439 if (okrate == 0 || error != 0 ||
440 ((flags & IEEE80211_F_DOFRATE) && fixedrate == 0))
441 return badrate | IEEE80211_RATE_BASIC;
442 else
443 return RV(okrate);
444 #undef RV
445 }
446
447 /*
448 * Reset 11g-related state.
449 */
450 void
451 ieee80211_reset_erp(struct ieee80211com *ic)
452 {
453 ic->ic_flags &= ~IEEE80211_F_USEPROT;
454 ic->ic_nonerpsta = 0;
455 ic->ic_longslotsta = 0;
456 /*
457 * Short slot time is enabled only when operating in 11g
458 * and not in an IBSS. We must also honor whether or not
459 * the driver is capable of doing it.
460 */
461 ieee80211_set_shortslottime(ic,
462 ic->ic_curmode == IEEE80211_MODE_11A ||
463 (ic->ic_curmode == IEEE80211_MODE_11G &&
464 ic->ic_opmode == IEEE80211_M_HOSTAP &&
465 (ic->ic_caps & IEEE80211_C_SHSLOT)));
466 /*
467 * Set short preamble and ERP barker-preamble flags.
468 */
469 if (ic->ic_curmode == IEEE80211_MODE_11A ||
470 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
471 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
472 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
473 } else {
474 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
475 ic->ic_flags |= IEEE80211_F_USEBARKER;
476 }
477 }
478
479 /*
480 * Set the short slot time state and notify the driver.
481 */
482 void
483 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
484 {
485 if (onoff)
486 ic->ic_flags |= IEEE80211_F_SHSLOT;
487 else
488 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
489 /* notify driver */
490 if (ic->ic_updateslot != NULL)
491 ic->ic_updateslot(ic->ic_ifp);
492 }
493
494 /*
495 * Check if the specified rate set supports ERP.
496 * NB: the rate set is assumed to be sorted.
497 */
498 int
499 ieee80211_iserp_rateset(struct ieee80211com *ic, struct ieee80211_rateset *rs)
500 {
501 #define N(a) (sizeof(a) / sizeof(a[0]))
502 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
503 int i, j;
504
505 if (rs->rs_nrates < N(rates))
506 return 0;
507 for (i = 0; i < N(rates); i++) {
508 for (j = 0; j < rs->rs_nrates; j++) {
509 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
510 if (rates[i] == r)
511 goto next;
512 if (r > rates[i])
513 return 0;
514 }
515 return 0;
516 next:
517 ;
518 }
519 return 1;
520 #undef N
521 }
522
523 /*
524 * Mark the basic rates for the 11g rate table based on the
525 * operating mode. For real 11g we mark all the 11b rates
526 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
527 * 11b rates. There's also a pseudo 11a-mode used to mark only
528 * the basic OFDM rates.
529 */
530 void
531 ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
532 {
533 static const struct ieee80211_rateset basic[] = {
534 { 0 }, /* IEEE80211_MODE_AUTO */
535 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11A */
536 { 2, { 2, 4 } }, /* IEEE80211_MODE_11B */
537 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11G (mixed b/g) */
538 { 0 }, /* IEEE80211_MODE_FH */
539 /* IEEE80211_MODE_PUREG (not yet) */
540 { 7, { 2, 4, 11, 22, 12, 24, 48 } },
541 };
542 int i, j;
543
544 for (i = 0; i < rs->rs_nrates; i++) {
545 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
546 for (j = 0; j < basic[mode].rs_nrates; j++)
547 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
548 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
549 break;
550 }
551 }
552 }
553
554 /*
555 * WME protocol support. The following parameters come from the spec.
556 */
557 typedef struct phyParamType {
558 u_int8_t aifsn;
559 u_int8_t logcwmin;
560 u_int8_t logcwmax;
561 u_int16_t txopLimit;
562 u_int8_t acm;
563 } paramType;
564
565 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
566 { 3, 4, 6 }, /* IEEE80211_MODE_AUTO */
567 { 3, 4, 6 }, /* IEEE80211_MODE_11A */
568 { 3, 5, 7 }, /* IEEE80211_MODE_11B */
569 { 3, 4, 6 }, /* IEEE80211_MODE_11G */
570 { 3, 5, 7 }, /* IEEE80211_MODE_FH */
571 { 2, 3, 5 }, /* IEEE80211_MODE_TURBO_A */
572 { 2, 3, 5 }, /* IEEE80211_MODE_TURBO_G */
573 };
574 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
575 { 7, 4, 10 }, /* IEEE80211_MODE_AUTO */
576 { 7, 4, 10 }, /* IEEE80211_MODE_11A */
577 { 7, 5, 10 }, /* IEEE80211_MODE_11B */
578 { 7, 4, 10 }, /* IEEE80211_MODE_11G */
579 { 7, 5, 10 }, /* IEEE80211_MODE_FH */
580 { 7, 3, 10 }, /* IEEE80211_MODE_TURBO_A */
581 { 7, 3, 10 }, /* IEEE80211_MODE_TURBO_G */
582 };
583 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
584 { 1, 3, 4, 94 }, /* IEEE80211_MODE_AUTO */
585 { 1, 3, 4, 94 }, /* IEEE80211_MODE_11A */
586 { 1, 4, 5, 188 }, /* IEEE80211_MODE_11B */
587 { 1, 3, 4, 94 }, /* IEEE80211_MODE_11G */
588 { 1, 4, 5, 188 }, /* IEEE80211_MODE_FH */
589 { 1, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_A */
590 { 1, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_G */
591 };
592 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
593 { 1, 2, 3, 47 }, /* IEEE80211_MODE_AUTO */
594 { 1, 2, 3, 47 }, /* IEEE80211_MODE_11A */
595 { 1, 3, 4, 102 }, /* IEEE80211_MODE_11B */
596 { 1, 2, 3, 47 }, /* IEEE80211_MODE_11G */
597 { 1, 3, 4, 102 }, /* IEEE80211_MODE_FH */
598 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_A */
599 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_G */
600 };
601
602 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
603 { 3, 4, 10 }, /* IEEE80211_MODE_AUTO */
604 { 3, 4, 10 }, /* IEEE80211_MODE_11A */
605 { 3, 5, 10 }, /* IEEE80211_MODE_11B */
606 { 3, 4, 10 }, /* IEEE80211_MODE_11G */
607 { 3, 5, 10 }, /* IEEE80211_MODE_FH */
608 { 2, 3, 10 }, /* IEEE80211_MODE_TURBO_A */
609 { 2, 3, 10 }, /* IEEE80211_MODE_TURBO_G */
610 };
611 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
612 { 2, 3, 4, 94 }, /* IEEE80211_MODE_AUTO */
613 { 2, 3, 4, 94 }, /* IEEE80211_MODE_11A */
614 { 2, 4, 5, 188 }, /* IEEE80211_MODE_11B */
615 { 2, 3, 4, 94 }, /* IEEE80211_MODE_11G */
616 { 2, 4, 5, 188 }, /* IEEE80211_MODE_FH */
617 { 2, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_A */
618 { 2, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_G */
619 };
620 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
621 { 2, 2, 3, 47 }, /* IEEE80211_MODE_AUTO */
622 { 2, 2, 3, 47 }, /* IEEE80211_MODE_11A */
623 { 2, 3, 4, 102 }, /* IEEE80211_MODE_11B */
624 { 2, 2, 3, 47 }, /* IEEE80211_MODE_11G */
625 { 2, 3, 4, 102 }, /* IEEE80211_MODE_FH */
626 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_A */
627 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_G */
628 };
629
630 void
631 ieee80211_wme_initparams(struct ieee80211com *ic)
632 {
633 struct ieee80211_wme_state *wme = &ic->ic_wme;
634 const paramType *pPhyParam, *pBssPhyParam;
635 struct wmeParams *wmep;
636 int i;
637
638 if ((ic->ic_caps & IEEE80211_C_WME) == 0)
639 return;
640
641 for (i = 0; i < WME_NUM_AC; i++) {
642 switch (i) {
643 case WME_AC_BK:
644 pPhyParam = &phyParamForAC_BK[ic->ic_curmode];
645 pBssPhyParam = &phyParamForAC_BK[ic->ic_curmode];
646 break;
647 case WME_AC_VI:
648 pPhyParam = &phyParamForAC_VI[ic->ic_curmode];
649 pBssPhyParam = &bssPhyParamForAC_VI[ic->ic_curmode];
650 break;
651 case WME_AC_VO:
652 pPhyParam = &phyParamForAC_VO[ic->ic_curmode];
653 pBssPhyParam = &bssPhyParamForAC_VO[ic->ic_curmode];
654 break;
655 case WME_AC_BE:
656 default:
657 pPhyParam = &phyParamForAC_BE[ic->ic_curmode];
658 pBssPhyParam = &bssPhyParamForAC_BE[ic->ic_curmode];
659 break;
660 }
661
662 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
663 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
664 wmep->wmep_acm = pPhyParam->acm;
665 wmep->wmep_aifsn = pPhyParam->aifsn;
666 wmep->wmep_logcwmin = pPhyParam->logcwmin;
667 wmep->wmep_logcwmax = pPhyParam->logcwmax;
668 wmep->wmep_txopLimit = pPhyParam->txopLimit;
669 } else {
670 wmep->wmep_acm = pBssPhyParam->acm;
671 wmep->wmep_aifsn = pBssPhyParam->aifsn;
672 wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
673 wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
674 wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
675
676 }
677 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
678 "%s: %s chan [acm %u aifsn %u log2(cwmin) %u "
679 "log2(cwmax) %u txpoLimit %u]\n", __func__
680 , ieee80211_wme_acnames[i]
681 , wmep->wmep_acm
682 , wmep->wmep_aifsn
683 , wmep->wmep_logcwmin
684 , wmep->wmep_logcwmax
685 , wmep->wmep_txopLimit
686 );
687
688 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
689 wmep->wmep_acm = pBssPhyParam->acm;
690 wmep->wmep_aifsn = pBssPhyParam->aifsn;
691 wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
692 wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
693 wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
694 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
695 "%s: %s bss [acm %u aifsn %u log2(cwmin) %u "
696 "log2(cwmax) %u txpoLimit %u]\n", __func__
697 , ieee80211_wme_acnames[i]
698 , wmep->wmep_acm
699 , wmep->wmep_aifsn
700 , wmep->wmep_logcwmin
701 , wmep->wmep_logcwmax
702 , wmep->wmep_txopLimit
703 );
704 }
705 /* NB: check ic_bss to avoid NULL deref on initial attach */
706 if (ic->ic_bss != NULL) {
707 /*
708 * Calculate agressive mode switching threshold based
709 * on beacon interval. This doesn't need locking since
710 * we're only called before entering the RUN state at
711 * which point we start sending beacon frames.
712 */
713 wme->wme_hipri_switch_thresh =
714 (HIGH_PRI_SWITCH_THRESH * ic->ic_bss->ni_intval) / 100;
715 ieee80211_wme_updateparams(ic);
716 }
717 }
718
719 /*
720 * Update WME parameters for ourself and the BSS.
721 */
722 void
723 ieee80211_wme_updateparams_locked(struct ieee80211com *ic)
724 {
725 static const paramType phyParam[IEEE80211_MODE_MAX] = {
726 { 2, 4, 10, 64 }, /* IEEE80211_MODE_AUTO */
727 { 2, 4, 10, 64 }, /* IEEE80211_MODE_11A */
728 { 2, 5, 10, 64 }, /* IEEE80211_MODE_11B */
729 { 2, 4, 10, 64 }, /* IEEE80211_MODE_11G */
730 { 2, 5, 10, 64 }, /* IEEE80211_MODE_FH */
731 { 1, 3, 10, 64 }, /* IEEE80211_MODE_TURBO_A */
732 { 1, 3, 10, 64 }, /* IEEE80211_MODE_TURBO_G */
733 };
734 struct ieee80211_wme_state *wme = &ic->ic_wme;
735 const struct wmeParams *wmep;
736 struct wmeParams *chanp, *bssp;
737 int i;
738
739 /* set up the channel access parameters for the physical device */
740 for (i = 0; i < WME_NUM_AC; i++) {
741 chanp = &wme->wme_chanParams.cap_wmeParams[i];
742 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
743 chanp->wmep_aifsn = wmep->wmep_aifsn;
744 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
745 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
746 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
747
748 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
749 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
750 chanp->wmep_aifsn = wmep->wmep_aifsn;
751 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
752 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
753 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
754 }
755
756 /*
757 * This implements agressive mode as found in certain
758 * vendors' AP's. When there is significant high
759 * priority (VI/VO) traffic in the BSS throttle back BE
760 * traffic by using conservative parameters. Otherwise
761 * BE uses agressive params to optimize performance of
762 * legacy/non-QoS traffic.
763 */
764 if ((ic->ic_opmode == IEEE80211_M_HOSTAP &&
765 (wme->wme_flags & WME_F_AGGRMODE) == 0) ||
766 (ic->ic_opmode != IEEE80211_M_HOSTAP &&
767 (ic->ic_bss->ni_flags & IEEE80211_NODE_QOS) == 0) ||
768 (ic->ic_flags & IEEE80211_F_WME) == 0) {
769 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
770 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
771
772 chanp->wmep_aifsn = bssp->wmep_aifsn =
773 phyParam[ic->ic_curmode].aifsn;
774 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
775 phyParam[ic->ic_curmode].logcwmin;
776 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
777 phyParam[ic->ic_curmode].logcwmax;
778 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
779 (ic->ic_caps & IEEE80211_C_BURST) ?
780 phyParam[ic->ic_curmode].txopLimit : 0;
781 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
782 "%s: %s [acm %u aifsn %u log2(cwmin) %u "
783 "log2(cwmax) %u txpoLimit %u]\n", __func__
784 , ieee80211_wme_acnames[WME_AC_BE]
785 , chanp->wmep_acm
786 , chanp->wmep_aifsn
787 , chanp->wmep_logcwmin
788 , chanp->wmep_logcwmax
789 , chanp->wmep_txopLimit
790 );
791 }
792
793 #ifndef IEEE80211_NO_HOSTAP
794 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
795 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) == 0) {
796 static const u_int8_t logCwMin[IEEE80211_MODE_MAX] = {
797 3, /* IEEE80211_MODE_AUTO */
798 3, /* IEEE80211_MODE_11A */
799 4, /* IEEE80211_MODE_11B */
800 3, /* IEEE80211_MODE_11G */
801 4, /* IEEE80211_MODE_FH */
802 3, /* IEEE80211_MODE_TURBO_A */
803 3, /* IEEE80211_MODE_TURBO_G */
804 };
805 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
806 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
807
808 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
809 logCwMin[ic->ic_curmode];
810 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
811 "%s: %s log2(cwmin) %u\n", __func__
812 , ieee80211_wme_acnames[WME_AC_BE]
813 , chanp->wmep_logcwmin
814 );
815 }
816 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */
817 /*
818 * Arrange for a beacon update and bump the parameter
819 * set number so associated stations load the new values.
820 */
821 wme->wme_bssChanParams.cap_info =
822 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
823 ic->ic_flags |= IEEE80211_F_WMEUPDATE;
824 }
825 #endif /* !IEEE80211_NO_HOSTAP */
826
827 wme->wme_update(ic);
828
829 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
830 "%s: WME params updated, cap_info 0x%x\n", __func__,
831 ic->ic_opmode == IEEE80211_M_STA ?
832 wme->wme_wmeChanParams.cap_info :
833 wme->wme_bssChanParams.cap_info);
834 }
835
836 void
837 ieee80211_wme_updateparams(struct ieee80211com *ic)
838 {
839
840 if (ic->ic_caps & IEEE80211_C_WME) {
841 IEEE80211_BEACON_LOCK(ic);
842 ieee80211_wme_updateparams_locked(ic);
843 IEEE80211_BEACON_UNLOCK(ic);
844 }
845 }
846
847 #ifndef IEEE80211_NO_HOSTAP
848 static void
849 sta_disassoc(void *arg, struct ieee80211_node *ni)
850 {
851 struct ieee80211com *ic = arg;
852
853 if (ni->ni_associd != 0) {
854 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
855 IEEE80211_REASON_ASSOC_LEAVE);
856 ieee80211_node_leave(ic, ni);
857 }
858 }
859
860 static void
861 sta_deauth(void *arg, struct ieee80211_node *ni)
862 {
863 struct ieee80211com *ic = arg;
864
865 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
866 IEEE80211_REASON_ASSOC_LEAVE);
867 }
868 #endif /* !IEEE80211_NO_HOSTAP */
869
870 static int
871 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
872 {
873 struct ifnet *ifp = ic->ic_ifp;
874 struct ieee80211_node *ni;
875 enum ieee80211_state ostate;
876
877 ostate = ic->ic_state;
878 IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
879 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
880 ic->ic_state = nstate; /* state transition */
881 ni = ic->ic_bss; /* NB: no reference held */
882 switch (nstate) {
883 case IEEE80211_S_INIT:
884 switch (ostate) {
885 case IEEE80211_S_INIT:
886 break;
887 case IEEE80211_S_RUN:
888 switch (ic->ic_opmode) {
889 case IEEE80211_M_STA:
890 IEEE80211_SEND_MGMT(ic, ni,
891 IEEE80211_FC0_SUBTYPE_DISASSOC,
892 IEEE80211_REASON_ASSOC_LEAVE);
893 ieee80211_sta_leave(ic, ni);
894 break;
895 case IEEE80211_M_HOSTAP:
896 #ifndef IEEE80211_NO_HOSTAP
897 ieee80211_iterate_nodes(&ic->ic_sta,
898 sta_disassoc, ic);
899 #endif /* !IEEE80211_NO_HOSTAP */
900 break;
901 default:
902 break;
903 }
904 goto reset;
905 case IEEE80211_S_ASSOC:
906 switch (ic->ic_opmode) {
907 case IEEE80211_M_STA:
908 IEEE80211_SEND_MGMT(ic, ni,
909 IEEE80211_FC0_SUBTYPE_DEAUTH,
910 IEEE80211_REASON_AUTH_LEAVE);
911 break;
912 case IEEE80211_M_HOSTAP:
913 #ifndef IEEE80211_NO_HOSTAP
914 ieee80211_iterate_nodes(&ic->ic_sta,
915 sta_deauth, ic);
916 #endif /* !IEEE80211_NO_HOSTAP */
917 break;
918 default:
919 break;
920 }
921 goto reset;
922 case IEEE80211_S_SCAN:
923 ieee80211_cancel_scan(ic);
924 goto reset;
925 case IEEE80211_S_AUTH:
926 reset:
927 ic->ic_mgt_timer = 0;
928 IF_PURGE(&ic->ic_mgtq);
929 ieee80211_reset_bss(ic);
930 break;
931 }
932 if (ic->ic_auth->ia_detach != NULL)
933 ic->ic_auth->ia_detach(ic);
934 break;
935 case IEEE80211_S_SCAN:
936 switch (ostate) {
937 case IEEE80211_S_INIT:
938 if ((ic->ic_opmode == IEEE80211_M_HOSTAP ||
939 ic->ic_opmode == IEEE80211_M_IBSS ||
940 ic->ic_opmode == IEEE80211_M_AHDEMO) &&
941 ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
942 /*
943 * AP operation and we already have a channel;
944 * bypass the scan and startup immediately.
945 */
946 ieee80211_create_ibss(ic, ic->ic_des_chan);
947 } else {
948 ieee80211_begin_scan(ic, arg);
949 }
950 break;
951 case IEEE80211_S_SCAN:
952 /*
953 * Scan next. If doing an active scan and the
954 * channel is not marked passive-only then send
955 * a probe request. Otherwise just listen for
956 * beacons on the channel.
957 */
958 if ((ic->ic_flags & IEEE80211_F_ASCAN) &&
959 (ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0) {
960 ieee80211_send_probereq(ni,
961 ic->ic_myaddr, ifp->if_broadcastaddr,
962 ifp->if_broadcastaddr,
963 ic->ic_des_essid, ic->ic_des_esslen,
964 ic->ic_opt_ie, ic->ic_opt_ie_len);
965 }
966 break;
967 case IEEE80211_S_RUN:
968 /* beacon miss */
969 IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE,
970 "no recent beacons from %s; rescanning\n",
971 ether_sprintf(ic->ic_bss->ni_bssid));
972 ieee80211_sta_leave(ic, ni);
973 ic->ic_flags &= ~IEEE80211_F_SIBSS; /* XXX */
974 /* FALLTHRU */
975 case IEEE80211_S_AUTH:
976 case IEEE80211_S_ASSOC:
977 /* timeout restart scan */
978 ni = ieee80211_find_node(&ic->ic_scan,
979 ic->ic_bss->ni_macaddr);
980 if (ni != NULL) {
981 ni->ni_fails++;
982 ieee80211_unref_node(&ni);
983 }
984 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO)
985 ieee80211_begin_scan(ic, arg);
986 break;
987 }
988 break;
989 case IEEE80211_S_AUTH:
990 switch (ostate) {
991 case IEEE80211_S_INIT:
992 case IEEE80211_S_SCAN:
993 IEEE80211_SEND_MGMT(ic, ni,
994 IEEE80211_FC0_SUBTYPE_AUTH, 1);
995 break;
996 case IEEE80211_S_AUTH:
997 case IEEE80211_S_ASSOC:
998 switch (arg) {
999 case IEEE80211_FC0_SUBTYPE_AUTH:
1000 /* ??? */
1001 IEEE80211_SEND_MGMT(ic, ni,
1002 IEEE80211_FC0_SUBTYPE_AUTH, 2);
1003 break;
1004 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1005 /* ignore and retry scan on timeout */
1006 break;
1007 }
1008 break;
1009 case IEEE80211_S_RUN:
1010 switch (arg) {
1011 case IEEE80211_FC0_SUBTYPE_AUTH:
1012 IEEE80211_SEND_MGMT(ic, ni,
1013 IEEE80211_FC0_SUBTYPE_AUTH, 2);
1014 ic->ic_state = ostate; /* stay RUN */
1015 break;
1016 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1017 ieee80211_sta_leave(ic, ni);
1018 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
1019 /* try to reauth */
1020 IEEE80211_SEND_MGMT(ic, ni,
1021 IEEE80211_FC0_SUBTYPE_AUTH, 1);
1022 }
1023 break;
1024 }
1025 break;
1026 }
1027 break;
1028 case IEEE80211_S_ASSOC:
1029 switch (ostate) {
1030 case IEEE80211_S_INIT:
1031 case IEEE80211_S_SCAN:
1032 case IEEE80211_S_ASSOC:
1033 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1034 "%s: invalid transition\n", __func__);
1035 break;
1036 case IEEE80211_S_AUTH:
1037 IEEE80211_SEND_MGMT(ic, ni,
1038 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
1039 break;
1040 case IEEE80211_S_RUN:
1041 ieee80211_sta_leave(ic, ni);
1042 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
1043 IEEE80211_SEND_MGMT(ic, ni,
1044 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1);
1045 }
1046 break;
1047 }
1048 break;
1049 case IEEE80211_S_RUN:
1050 if (ic->ic_flags & IEEE80211_F_WPA) {
1051 /* XXX validate prerequisites */
1052 }
1053 switch (ostate) {
1054 case IEEE80211_S_INIT:
1055 if (ic->ic_opmode == IEEE80211_M_MONITOR)
1056 break;
1057 /* fall thru... */
1058 case IEEE80211_S_AUTH:
1059 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1060 "%s: invalid transition\n", __func__);
1061 /* fall thru... */
1062 case IEEE80211_S_RUN:
1063 break;
1064 case IEEE80211_S_SCAN: /* adhoc/hostap mode */
1065 case IEEE80211_S_ASSOC: /* infra mode */
1066 IASSERT(ni->ni_txrate < ni->ni_rates.rs_nrates,
1067 ("%s: bogus xmit rate %u setup\n", __func__,
1068 ni->ni_txrate));
1069 #ifdef IEEE80211_DEBUG
1070 if (ieee80211_msg_debug(ic)) {
1071 if (ic->ic_opmode == IEEE80211_M_STA)
1072 if_printf(ifp, "associated ");
1073 else
1074 if_printf(ifp, "synchronized ");
1075 printf("with %s ssid ",
1076 ether_sprintf(ni->ni_bssid));
1077 ieee80211_print_essid(ic->ic_bss->ni_essid,
1078 ni->ni_esslen);
1079 printf(" channel %d start %uMb\n",
1080 ieee80211_chan2ieee(ic, ic->ic_curchan),
1081 IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate]));
1082 }
1083 #endif
1084 ic->ic_mgt_timer = 0;
1085 if (ic->ic_opmode == IEEE80211_M_STA)
1086 ieee80211_notify_node_join(ic, ni,
1087 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
1088 (*ifp->if_start)(ifp); /* XXX not authorized yet */
1089 break;
1090 }
1091 /*
1092 * Start/stop the authenticator when operating as an
1093 * AP. We delay until here to allow configuration to
1094 * happen out of order.
1095 */
1096 if (ic->ic_opmode == IEEE80211_M_HOSTAP && /* XXX IBSS/AHDEMO */
1097 ic->ic_auth->ia_attach != NULL) {
1098 /* XXX check failure */
1099 ic->ic_auth->ia_attach(ic);
1100 } else if (ic->ic_auth->ia_detach != NULL) {
1101 ic->ic_auth->ia_detach(ic);
1102 }
1103 /*
1104 * When 802.1x is not in use mark the port authorized
1105 * at this point so traffic can flow.
1106 */
1107 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
1108 ieee80211_node_authorize(ni);
1109 /*
1110 * Enable inactivity processing.
1111 * XXX
1112 */
1113 ic->ic_scan.nt_inact_timer = IEEE80211_INACT_WAIT;
1114 ic->ic_sta.nt_inact_timer = IEEE80211_INACT_WAIT;
1115 break;
1116 }
1117 return 0;
1118 }
1119