1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005-2008 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 /* 30 * IEEE 802.11 regdomain support. 31 */ 32 #include "opt_wlan.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/socket.h> 39 40 #include <net/if.h> 41 #include <net/if_var.h> 42 #include <net/if_media.h> 43 #include <net/ethernet.h> 44 45 #include <net80211/ieee80211_var.h> 46 #include <net80211/ieee80211_regdomain.h> 47 48 static void 49 null_getradiocaps(struct ieee80211com *ic, int maxchan, 50 int *n, struct ieee80211_channel *c) 51 { 52 /* just feed back the current channel list */ 53 if (maxchan > ic->ic_nchans) 54 maxchan = ic->ic_nchans; 55 memcpy(c, ic->ic_channels, maxchan*sizeof(struct ieee80211_channel)); 56 *n = maxchan; 57 } 58 59 static int 60 null_setregdomain(struct ieee80211com *ic, 61 struct ieee80211_regdomain *rd, 62 int nchans, struct ieee80211_channel chans[]) 63 { 64 return 0; /* accept anything */ 65 } 66 67 void 68 ieee80211_regdomain_attach(struct ieee80211com *ic) 69 { 70 if (ic->ic_regdomain.regdomain == 0 && 71 ic->ic_regdomain.country == CTRY_DEFAULT) { 72 ic->ic_regdomain.location = ' '; /* both */ 73 /* NB: driver calls ieee80211_init_channels or similar */ 74 } 75 ic->ic_getradiocaps = null_getradiocaps; 76 ic->ic_setregdomain = null_setregdomain; 77 } 78 79 void 80 ieee80211_regdomain_detach(struct ieee80211com *ic) 81 { 82 if (ic->ic_countryie != NULL) { 83 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE); 84 ic->ic_countryie = NULL; 85 } 86 } 87 88 void 89 ieee80211_regdomain_vattach(struct ieee80211vap *vap) 90 { 91 } 92 93 void 94 ieee80211_regdomain_vdetach(struct ieee80211vap *vap) 95 { 96 } 97 98 static const uint8_t def_chan_2ghz[] = 99 { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 }; 100 static const uint8_t def_chan_5ghz_band1[] = 101 { 36, 40, 44, 48, 52, 56, 60, 64 }; 102 static const uint8_t def_chan_5ghz_band2[] = 103 { 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 }; 104 static const uint8_t def_chan_5ghz_band3[] = 105 { 149, 153, 157, 161 }; 106 107 /* 108 * Setup the channel list for the specified regulatory domain, 109 * country code, and operating modes. This interface is used 110 * when a driver does not obtain the channel list from another 111 * source (such as firmware). 112 */ 113 int 114 ieee80211_init_channels(struct ieee80211com *ic, 115 const struct ieee80211_regdomain *rd, const uint8_t bands[]) 116 { 117 struct ieee80211_channel *chans = ic->ic_channels; 118 int *nchans = &ic->ic_nchans; 119 int cbw_flags; 120 121 /* XXX just do something for now */ 122 cbw_flags = (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) ? 123 NET80211_CBW_FLAG_HT40 : 0; 124 *nchans = 0; 125 if (isset(bands, IEEE80211_MODE_11B) || 126 isset(bands, IEEE80211_MODE_11G) || 127 isset(bands, IEEE80211_MODE_11NG)) { 128 int nchan = nitems(def_chan_2ghz); 129 if (!(rd != NULL && rd->ecm)) 130 nchan -= 3; 131 132 ieee80211_add_channel_list_2ghz(chans, IEEE80211_CHAN_MAX, 133 nchans, def_chan_2ghz, nchan, bands, cbw_flags); 134 } 135 /* XXX IEEE80211_MODE_VHT_2GHZ if we really want to. */ 136 137 if (isset(bands, IEEE80211_MODE_11A) || 138 isset(bands, IEEE80211_MODE_11NA)) { 139 ieee80211_add_channel_list_5ghz(chans, IEEE80211_CHAN_MAX, 140 nchans, def_chan_5ghz_band1, nitems(def_chan_5ghz_band1), 141 bands, cbw_flags); 142 ieee80211_add_channel_list_5ghz(chans, IEEE80211_CHAN_MAX, 143 nchans, def_chan_5ghz_band2, nitems(def_chan_5ghz_band2), 144 bands, cbw_flags); 145 ieee80211_add_channel_list_5ghz(chans, IEEE80211_CHAN_MAX, 146 nchans, def_chan_5ghz_band3, nitems(def_chan_5ghz_band3), 147 bands, cbw_flags); 148 } 149 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) { 150 cbw_flags |= NET80211_CBW_FLAG_HT40; /* Make sure this is set; or assert? */ 151 cbw_flags |= NET80211_CBW_FLAG_VHT80; 152 if (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ(ic->ic_vhtcaps)) 153 cbw_flags |= NET80211_CBW_FLAG_VHT160; 154 if (IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160_80P80MHZ( 155 ic->ic_vhtcaps)) 156 cbw_flags |= NET80211_CBW_FLAG_VHT80P80; 157 ieee80211_add_channel_list_5ghz(chans, IEEE80211_CHAN_MAX, 158 nchans, def_chan_5ghz_band1, nitems(def_chan_5ghz_band1), 159 bands, cbw_flags); 160 ieee80211_add_channel_list_5ghz(chans, IEEE80211_CHAN_MAX, 161 nchans, def_chan_5ghz_band2, nitems(def_chan_5ghz_band2), 162 bands, cbw_flags); 163 ieee80211_add_channel_list_5ghz(chans, IEEE80211_CHAN_MAX, 164 nchans, def_chan_5ghz_band3, nitems(def_chan_5ghz_band3), 165 bands, cbw_flags); 166 } 167 if (rd != NULL) 168 ic->ic_regdomain = *rd; 169 170 return 0; 171 } 172 173 static __inline int 174 chancompar(const void *a, const void *b) 175 { 176 const struct ieee80211_channel *ca = a; 177 const struct ieee80211_channel *cb = b; 178 179 return (ca->ic_freq == cb->ic_freq) ? 180 (ca->ic_flags & IEEE80211_CHAN_ALL) - 181 (cb->ic_flags & IEEE80211_CHAN_ALL) : 182 ca->ic_freq - cb->ic_freq; 183 } 184 185 /* 186 * Insertion sort. 187 */ 188 #define swap(_a, _b, _size) { \ 189 uint8_t *s = _b; \ 190 int i = _size; \ 191 do { \ 192 uint8_t tmp = *_a; \ 193 *_a++ = *s; \ 194 *s++ = tmp; \ 195 } while (--i); \ 196 _a -= _size; \ 197 } 198 199 static void 200 sort_channels(void *a, size_t n, size_t size) 201 { 202 uint8_t *aa = a; 203 uint8_t *ai, *t; 204 205 KASSERT(n > 0, ("no channels")); 206 for (ai = aa+size; --n >= 1; ai += size) 207 for (t = ai; t > aa; t -= size) { 208 uint8_t *u = t - size; 209 if (chancompar(u, t) <= 0) 210 break; 211 swap(u, t, size); 212 } 213 } 214 #undef swap 215 216 /* 217 * Order channels w/ the same frequency so that 218 * b < g < htg and a < hta. This is used to optimize 219 * channel table lookups and some user applications 220 * may also depend on it (though they should not). 221 */ 222 void 223 ieee80211_sort_channels(struct ieee80211_channel chans[], int nchans) 224 { 225 if (nchans > 0) 226 sort_channels(chans, nchans, sizeof(struct ieee80211_channel)); 227 } 228 229 /* 230 * Allocate and construct a Country Information IE. 231 */ 232 struct ieee80211_appie * 233 ieee80211_alloc_countryie(struct ieee80211com *ic) 234 { 235 #define CHAN_UNINTERESTING \ 236 (IEEE80211_CHAN_TURBO | IEEE80211_CHAN_STURBO | \ 237 IEEE80211_CHAN_HALF | IEEE80211_CHAN_QUARTER) 238 /* XXX what about auto? */ 239 /* flag set of channels to be excluded (band added below) */ 240 static const int skipflags[IEEE80211_MODE_MAX] = { 241 [IEEE80211_MODE_AUTO] = CHAN_UNINTERESTING, 242 [IEEE80211_MODE_11A] = CHAN_UNINTERESTING, 243 [IEEE80211_MODE_11B] = CHAN_UNINTERESTING, 244 [IEEE80211_MODE_11G] = CHAN_UNINTERESTING, 245 [IEEE80211_MODE_FH] = CHAN_UNINTERESTING 246 | IEEE80211_CHAN_OFDM 247 | IEEE80211_CHAN_CCK 248 | IEEE80211_CHAN_DYN, 249 [IEEE80211_MODE_TURBO_A] = CHAN_UNINTERESTING, 250 [IEEE80211_MODE_TURBO_G] = CHAN_UNINTERESTING, 251 [IEEE80211_MODE_STURBO_A] = CHAN_UNINTERESTING, 252 [IEEE80211_MODE_HALF] = IEEE80211_CHAN_TURBO 253 | IEEE80211_CHAN_STURBO, 254 [IEEE80211_MODE_QUARTER] = IEEE80211_CHAN_TURBO 255 | IEEE80211_CHAN_STURBO, 256 [IEEE80211_MODE_11NA] = CHAN_UNINTERESTING, 257 [IEEE80211_MODE_11NG] = CHAN_UNINTERESTING, 258 }; 259 const struct ieee80211_regdomain *rd = &ic->ic_regdomain; 260 uint8_t nextchan, chans[IEEE80211_CHAN_BYTES], *frm; 261 struct ieee80211_appie *aie; 262 struct ieee80211_country_ie *ie; 263 int i, skip, nruns; 264 265 aie = IEEE80211_MALLOC(IEEE80211_COUNTRY_MAX_SIZE, M_80211_NODE_IE, 266 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 267 if (aie == NULL) { 268 ic_printf(ic, "%s: unable to allocate memory for country ie\n", 269 __func__); 270 /* XXX stat */ 271 return NULL; 272 } 273 ie = (struct ieee80211_country_ie *) aie->ie_data; 274 ie->ie = IEEE80211_ELEMID_COUNTRY; 275 if (rd->isocc[0] == '\0') { 276 ic_printf(ic, "no ISO country string for cc %d; using blanks\n", 277 rd->country); 278 ie->cc[0] = ie->cc[1] = ' '; 279 } else { 280 ie->cc[0] = rd->isocc[0]; 281 ie->cc[1] = rd->isocc[1]; 282 } 283 /* 284 * Indoor/Outdoor portion of country string: 285 * 'I' indoor only 286 * 'O' outdoor only 287 * ' ' all environments 288 */ 289 ie->cc[2] = (rd->location == 'I' ? 'I' : 290 rd->location == 'O' ? 'O' : ' '); 291 /* 292 * Run-length encoded channel+max tx power info. 293 */ 294 frm = (uint8_t *)&ie->band[0]; 295 nextchan = 0; /* NB: impossible channel # */ 296 nruns = 0; 297 memset(chans, 0, sizeof(chans)); 298 skip = skipflags[ieee80211_chan2mode(ic->ic_bsschan)]; 299 if (IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan)) 300 skip |= IEEE80211_CHAN_2GHZ; 301 else if (IEEE80211_IS_CHAN_2GHZ(ic->ic_bsschan)) 302 skip |= IEEE80211_CHAN_5GHZ; 303 for (i = 0; i < ic->ic_nchans; i++) { 304 const struct ieee80211_channel *c = &ic->ic_channels[i]; 305 306 if (isset(chans, c->ic_ieee)) /* suppress dup's */ 307 continue; 308 if (c->ic_flags & skip) /* skip band, etc. */ 309 continue; 310 setbit(chans, c->ic_ieee); 311 if (c->ic_ieee != nextchan || 312 c->ic_maxregpower != frm[-1]) { /* new run */ 313 if (nruns == IEEE80211_COUNTRY_MAX_BANDS) { 314 ic_printf(ic, "%s: country ie too big, " 315 "runs > max %d, truncating\n", 316 __func__, IEEE80211_COUNTRY_MAX_BANDS); 317 /* XXX stat? fail? */ 318 break; 319 } 320 frm[0] = c->ic_ieee; /* starting channel # */ 321 frm[1] = 1; /* # channels in run */ 322 frm[2] = c->ic_maxregpower; /* tx power cap */ 323 frm += 3; 324 nextchan = c->ic_ieee + 1; /* overflow? */ 325 nruns++; 326 } else { /* extend run */ 327 frm[-2]++; 328 nextchan++; 329 } 330 } 331 ie->len = frm - ie->cc; 332 if (ie->len & 1) { /* Zero pad to multiple of 2 */ 333 ie->len++; 334 *frm++ = 0; 335 } 336 aie->ie_len = frm - aie->ie_data; 337 338 return aie; 339 #undef CHAN_UNINTERESTING 340 } 341 342 static int 343 allvapsdown(struct ieee80211com *ic) 344 { 345 struct ieee80211vap *vap; 346 347 IEEE80211_LOCK_ASSERT(ic); 348 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) 349 if (vap->iv_state != IEEE80211_S_INIT) 350 return 0; 351 return 1; 352 } 353 354 int 355 ieee80211_setregdomain(struct ieee80211vap *vap, 356 struct ieee80211_regdomain_req *reg) 357 { 358 struct ieee80211com *ic = vap->iv_ic; 359 struct ieee80211_channel *c; 360 int desfreq = 0, desflags = 0; /* XXX silence gcc complaint */ 361 int error, i; 362 363 if (reg->rd.location != 'I' && reg->rd.location != 'O' && 364 reg->rd.location != ' ') { 365 IEEE80211_DPRINTF(vap, IEEE80211_MSG_IOCTL, 366 "%s: invalid location 0x%x\n", __func__, reg->rd.location); 367 return EINVAL; 368 } 369 if (reg->rd.isocc[0] == '\0' || reg->rd.isocc[1] == '\0') { 370 IEEE80211_DPRINTF(vap, IEEE80211_MSG_IOCTL, 371 "%s: invalid iso cc 0x%x:0x%x\n", __func__, 372 reg->rd.isocc[0], reg->rd.isocc[1]); 373 return EINVAL; 374 } 375 if (reg->chaninfo.ic_nchans > IEEE80211_CHAN_MAX) { 376 IEEE80211_DPRINTF(vap, IEEE80211_MSG_IOCTL, 377 "%s: too many channels %u, max %u\n", __func__, 378 reg->chaninfo.ic_nchans, IEEE80211_CHAN_MAX); 379 return EINVAL; 380 } 381 /* 382 * Calculate freq<->IEEE mapping and default max tx power 383 * for channels not setup. The driver can override these 384 * setting to reflect device properties/requirements. 385 */ 386 for (i = 0; i < reg->chaninfo.ic_nchans; i++) { 387 c = ®->chaninfo.ic_chans[i]; 388 if (c->ic_freq == 0 || c->ic_flags == 0) { 389 IEEE80211_DPRINTF(vap, IEEE80211_MSG_IOCTL, 390 "%s: invalid channel spec at [%u]\n", __func__, i); 391 return EINVAL; 392 } 393 if (c->ic_maxregpower == 0) { 394 IEEE80211_DPRINTF(vap, IEEE80211_MSG_IOCTL, 395 "%s: invalid channel spec, zero maxregpower, " 396 "freq %u flags 0x%x\n", __func__, 397 c->ic_freq, c->ic_flags); 398 return EINVAL; 399 } 400 if (c->ic_ieee == 0) 401 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags); 402 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0) 403 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq + 404 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20), 405 c->ic_flags); 406 if (c->ic_maxpower == 0) 407 c->ic_maxpower = 2*c->ic_maxregpower; 408 } 409 IEEE80211_LOCK(ic); 410 /* XXX bandaid; a running vap will likely crash */ 411 if (!allvapsdown(ic)) { 412 IEEE80211_UNLOCK(ic); 413 IEEE80211_DPRINTF(vap, IEEE80211_MSG_IOCTL, 414 "%s: reject: vaps are running\n", __func__); 415 return EBUSY; 416 } 417 error = ic->ic_setregdomain(ic, ®->rd, 418 reg->chaninfo.ic_nchans, reg->chaninfo.ic_chans); 419 if (error != 0) { 420 IEEE80211_UNLOCK(ic); 421 IEEE80211_DPRINTF(vap, IEEE80211_MSG_IOCTL, 422 "%s: driver rejected request, error %u\n", __func__, error); 423 return error; 424 } 425 /* 426 * Commit: copy in new channel table and reset media state. 427 * On return the state machines will be clocked so all vaps 428 * will reset their state. 429 * 430 * XXX ic_bsschan is marked undefined, must have vap's in 431 * INIT state or we blow up forcing stations off 432 */ 433 /* 434 * Save any desired channel for restore below. Note this 435 * needs to be done for all vaps but for now we only do 436 * the one where the ioctl is issued. 437 */ 438 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC) { 439 desfreq = vap->iv_des_chan->ic_freq; 440 desflags = vap->iv_des_chan->ic_flags; 441 } 442 /* regdomain parameters */ 443 memcpy(&ic->ic_regdomain, ®->rd, sizeof(reg->rd)); 444 /* channel table */ 445 memcpy(ic->ic_channels, reg->chaninfo.ic_chans, 446 reg->chaninfo.ic_nchans * sizeof(struct ieee80211_channel)); 447 ic->ic_nchans = reg->chaninfo.ic_nchans; 448 memset(&ic->ic_channels[ic->ic_nchans], 0, 449 (IEEE80211_CHAN_MAX - ic->ic_nchans) * 450 sizeof(struct ieee80211_channel)); 451 ieee80211_chan_init(ic); 452 453 /* 454 * Invalidate channel-related state. 455 */ 456 if (ic->ic_countryie != NULL) { 457 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE); 458 ic->ic_countryie = NULL; 459 } 460 ieee80211_scan_flush(vap); 461 ieee80211_dfs_reset(ic); 462 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC) { 463 c = ieee80211_find_channel(ic, desfreq, desflags); 464 /* NB: may be NULL if not present in new channel list */ 465 vap->iv_des_chan = (c != NULL) ? c : IEEE80211_CHAN_ANYC; 466 } 467 IEEE80211_UNLOCK(ic); 468 469 return 0; 470 } 471