| 1 | /* $NetBSD: ieee80211_proto.c,v 1.33 2016/07/07 06:55:43 msaitoh 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 1.33 2016/07/07 06:55:43 msaitoh Exp $" ); |
| 40 | #endif |
| 41 | |
| 42 | /* |
| 43 | * IEEE 802.11 protocol support. |
| 44 | */ |
| 45 | |
| 46 | #ifdef _KERNEL_OPT |
| 47 | #include "opt_inet.h" |
| 48 | #endif |
| 49 | |
| 50 | #include <sys/param.h> |
| 51 | #include <sys/kernel.h> |
| 52 | #include <sys/systm.h> |
| 53 | |
| 54 | #include <sys/socket.h> |
| 55 | #include <sys/sockio.h> |
| 56 | #include <sys/endian.h> |
| 57 | #include <sys/errno.h> |
| 58 | #include <sys/proc.h> |
| 59 | #include <sys/sysctl.h> |
| 60 | |
| 61 | #include <net/if.h> |
| 62 | #include <net/if_media.h> |
| 63 | #include <net/if_arp.h> |
| 64 | #include <net/if_ether.h> |
| 65 | #include <net/if_llc.h> |
| 66 | |
| 67 | #include <net80211/ieee80211_netbsd.h> |
| 68 | #include <net80211/ieee80211_var.h> |
| 69 | |
| 70 | #include <net/bpf.h> |
| 71 | |
| 72 | #ifdef INET |
| 73 | #include <netinet/in.h> |
| 74 | #include <net/if_ether.h> |
| 75 | #endif |
| 76 | |
| 77 | #include <net/route.h> |
| 78 | /* XXX tunables */ |
| 79 | #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ |
| 80 | #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ |
| 81 | |
| 82 | #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) |
| 83 | |
| 84 | const char *ieee80211_mgt_subtype_name[] = { |
| 85 | "assoc_req" , "assoc_resp" , "reassoc_req" , "reassoc_resp" , |
| 86 | "probe_req" , "probe_resp" , "reserved#6" , "reserved#7" , |
| 87 | "beacon" , "atim" , "disassoc" , "auth" , |
| 88 | "deauth" , "reserved#13" , "reserved#14" , "reserved#15" |
| 89 | }; |
| 90 | const char *ieee80211_ctl_subtype_name[] = { |
| 91 | "reserved#0" , "reserved#1" , "reserved#2" , "reserved#3" , |
| 92 | "reserved#3" , "reserved#5" , "reserved#6" , "reserved#7" , |
| 93 | "reserved#8" , "reserved#9" , "ps_poll" , "rts" , |
| 94 | "cts" , "ack" , "cf_end" , "cf_end_ack" |
| 95 | }; |
| 96 | const char *ieee80211_state_name[IEEE80211_S_MAX] = { |
| 97 | "INIT" , /* IEEE80211_S_INIT */ |
| 98 | "SCAN" , /* IEEE80211_S_SCAN */ |
| 99 | "AUTH" , /* IEEE80211_S_AUTH */ |
| 100 | "ASSOC" , /* IEEE80211_S_ASSOC */ |
| 101 | "RUN" /* IEEE80211_S_RUN */ |
| 102 | }; |
| 103 | const char *ieee80211_wme_acnames[] = { |
| 104 | "WME_AC_BE" , |
| 105 | "WME_AC_BK" , |
| 106 | "WME_AC_VI" , |
| 107 | "WME_AC_VO" , |
| 108 | "WME_UPSD" , |
| 109 | }; |
| 110 | |
| 111 | static int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int); |
| 112 | |
| 113 | void |
| 114 | ieee80211_proto_attach(struct ieee80211com *ic) |
| 115 | { |
| 116 | struct ifnet *ifp = ic->ic_ifp; |
| 117 | |
| 118 | /* XXX room for crypto */ |
| 119 | ifp->if_hdrlen = sizeof(struct ieee80211_qosframe_addr4); |
| 120 | |
| 121 | ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT; |
| 122 | ic->ic_fragthreshold = IEEE80211_FRAG_DEFAULT; |
| 123 | ic->ic_fixed_rate = IEEE80211_FIXED_RATE_NONE; |
| 124 | ic->ic_bmiss_max = IEEE80211_BMISS_MAX; |
| 125 | ic->ic_mcast_rate = IEEE80211_MCAST_RATE_DEFAULT; |
| 126 | ic->ic_protmode = IEEE80211_PROT_CTSONLY; |
| 127 | ic->ic_roaming = IEEE80211_ROAMING_AUTO; |
| 128 | |
| 129 | ic->ic_wme.wme_hipri_switch_hysteresis = |
| 130 | AGGRESSIVE_MODE_SWITCH_HYSTERESIS; |
| 131 | |
| 132 | /* protocol state change handler */ |
| 133 | ic->ic_newstate = ieee80211_newstate; |
| 134 | |
| 135 | /* initialize management frame handlers */ |
| 136 | ic->ic_recv_mgmt = ieee80211_recv_mgmt; |
| 137 | ic->ic_send_mgmt = ieee80211_send_mgmt; |
| 138 | } |
| 139 | |
| 140 | void |
| 141 | ieee80211_proto_detach(struct ieee80211com *ic) |
| 142 | { |
| 143 | |
| 144 | /* |
| 145 | * This should not be needed as we detach when reseting |
| 146 | * the state but be conservative here since the |
| 147 | * authenticator may do things like spawn kernel threads. |
| 148 | */ |
| 149 | if (ic->ic_auth->ia_detach) |
| 150 | ic->ic_auth->ia_detach(ic); |
| 151 | |
| 152 | ieee80211_drain_ifq(&ic->ic_mgtq); |
| 153 | |
| 154 | /* |
| 155 | * Detach any ACL'ator. |
| 156 | */ |
| 157 | if (ic->ic_acl != NULL) |
| 158 | ic->ic_acl->iac_detach(ic); |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * Simple-minded authenticator module support. |
| 163 | */ |
| 164 | |
| 165 | #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) |
| 166 | /* XXX well-known names */ |
| 167 | static const char *auth_modnames[IEEE80211_AUTH_MAX] = { |
| 168 | "wlan_internal" , /* IEEE80211_AUTH_NONE */ |
| 169 | "wlan_internal" , /* IEEE80211_AUTH_OPEN */ |
| 170 | "wlan_internal" , /* IEEE80211_AUTH_SHARED */ |
| 171 | "wlan_xauth" , /* IEEE80211_AUTH_8021X */ |
| 172 | "wlan_internal" , /* IEEE80211_AUTH_AUTO */ |
| 173 | "wlan_xauth" , /* IEEE80211_AUTH_WPA */ |
| 174 | }; |
| 175 | static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; |
| 176 | |
| 177 | static const struct ieee80211_authenticator auth_internal = { |
| 178 | .ia_name = "wlan_internal" , |
| 179 | .ia_attach = NULL, |
| 180 | .ia_detach = NULL, |
| 181 | .ia_node_join = NULL, |
| 182 | .ia_node_leave = NULL, |
| 183 | }; |
| 184 | |
| 185 | /* |
| 186 | * Setup internal authenticators once; they are never unregistered. |
| 187 | */ |
| 188 | static void |
| 189 | ieee80211_auth_setup(void) |
| 190 | { |
| 191 | ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); |
| 192 | ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); |
| 193 | ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); |
| 194 | } |
| 195 | |
| 196 | const struct ieee80211_authenticator * |
| 197 | ieee80211_authenticator_get(int auth) |
| 198 | { |
| 199 | static int initialized = 0; |
| 200 | if (!initialized) { |
| 201 | ieee80211_auth_setup(); |
| 202 | initialized = 1; |
| 203 | } |
| 204 | if (auth >= IEEE80211_AUTH_MAX) |
| 205 | return NULL; |
| 206 | if (authenticators[auth] == NULL) |
| 207 | ieee80211_load_module(auth_modnames[auth]); |
| 208 | return authenticators[auth]; |
| 209 | } |
| 210 | |
| 211 | void |
| 212 | ieee80211_authenticator_register(int type, |
| 213 | const struct ieee80211_authenticator *auth) |
| 214 | { |
| 215 | if (type >= IEEE80211_AUTH_MAX) |
| 216 | return; |
| 217 | authenticators[type] = auth; |
| 218 | } |
| 219 | |
| 220 | void |
| 221 | ieee80211_authenticator_unregister(int type) |
| 222 | { |
| 223 | |
| 224 | if (type >= IEEE80211_AUTH_MAX) |
| 225 | return; |
| 226 | authenticators[type] = NULL; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * Very simple-minded ACL module support. |
| 231 | */ |
| 232 | /* XXX just one for now */ |
| 233 | static const struct ieee80211_aclator *acl = NULL; |
| 234 | |
| 235 | void |
| 236 | ieee80211_aclator_register(const struct ieee80211_aclator *iac) |
| 237 | { |
| 238 | printf("wlan: %s acl policy registered\n" , iac->iac_name); |
| 239 | acl = iac; |
| 240 | } |
| 241 | |
| 242 | void |
| 243 | ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) |
| 244 | { |
| 245 | if (acl == iac) |
| 246 | acl = NULL; |
| 247 | printf("wlan: %s acl policy unregistered\n" , iac->iac_name); |
| 248 | } |
| 249 | |
| 250 | const struct ieee80211_aclator * |
| 251 | ieee80211_aclator_get(const char *name) |
| 252 | { |
| 253 | if (acl == NULL) |
| 254 | ieee80211_load_module("wlan_acl" ); |
| 255 | return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; |
| 256 | } |
| 257 | |
| 258 | void |
| 259 | ieee80211_print_essid(const u_int8_t *essid, int len) |
| 260 | { |
| 261 | const u_int8_t *p; |
| 262 | int i; |
| 263 | |
| 264 | if (len > IEEE80211_NWID_LEN) |
| 265 | len = IEEE80211_NWID_LEN; |
| 266 | /* determine printable or not */ |
| 267 | for (i = 0, p = essid; i < len; i++, p++) { |
| 268 | if (*p < ' ' || *p > 0x7e) |
| 269 | break; |
| 270 | } |
| 271 | if (i == len) { |
| 272 | printf("\"" ); |
| 273 | for (i = 0, p = essid; i < len; i++, p++) |
| 274 | printf("%c" , *p); |
| 275 | printf("\"" ); |
| 276 | } else { |
| 277 | printf("0x" ); |
| 278 | for (i = 0, p = essid; i < len; i++, p++) |
| 279 | printf("%02x" , *p); |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | void |
| 284 | ieee80211_dump_pkt(const u_int8_t *buf, int len, int rate, int ) |
| 285 | { |
| 286 | const struct ieee80211_frame *wh; |
| 287 | int i; |
| 288 | |
| 289 | wh = (const struct ieee80211_frame *)buf; |
| 290 | switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { |
| 291 | case IEEE80211_FC1_DIR_NODS: |
| 292 | printf("NODS %s" , ether_sprintf(wh->i_addr2)); |
| 293 | printf("->%s" , ether_sprintf(wh->i_addr1)); |
| 294 | printf("(%s)" , ether_sprintf(wh->i_addr3)); |
| 295 | break; |
| 296 | case IEEE80211_FC1_DIR_TODS: |
| 297 | printf("TODS %s" , ether_sprintf(wh->i_addr2)); |
| 298 | printf("->%s" , ether_sprintf(wh->i_addr3)); |
| 299 | printf("(%s)" , ether_sprintf(wh->i_addr1)); |
| 300 | break; |
| 301 | case IEEE80211_FC1_DIR_FROMDS: |
| 302 | printf("FRDS %s" , ether_sprintf(wh->i_addr3)); |
| 303 | printf("->%s" , ether_sprintf(wh->i_addr1)); |
| 304 | printf("(%s)" , ether_sprintf(wh->i_addr2)); |
| 305 | break; |
| 306 | case IEEE80211_FC1_DIR_DSTODS: |
| 307 | printf("DSDS %s" , ether_sprintf((const u_int8_t *)&wh[1])); |
| 308 | printf("->%s" , ether_sprintf(wh->i_addr3)); |
| 309 | printf("(%s" , ether_sprintf(wh->i_addr2)); |
| 310 | printf("->%s)" , ether_sprintf(wh->i_addr1)); |
| 311 | break; |
| 312 | } |
| 313 | switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { |
| 314 | case IEEE80211_FC0_TYPE_DATA: |
| 315 | printf(" data" ); |
| 316 | break; |
| 317 | case IEEE80211_FC0_TYPE_MGT: |
| 318 | printf(" %s" , ieee80211_mgt_subtype_name[ |
| 319 | (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) |
| 320 | >> IEEE80211_FC0_SUBTYPE_SHIFT]); |
| 321 | break; |
| 322 | default: |
| 323 | printf(" type#%d" , wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); |
| 324 | break; |
| 325 | } |
| 326 | if (wh->i_fc[1] & IEEE80211_FC1_WEP) { |
| 327 | printf(" WEP [IV" ); |
| 328 | for (i = 0; i < IEEE80211_WEP_IVLEN; i++) |
| 329 | printf(" %.02x" , buf[sizeof(*wh)+i]); |
| 330 | printf(" KID %u]" , buf[sizeof(*wh)+i] >> 6); |
| 331 | } |
| 332 | if (rate >= 0) |
| 333 | printf(" %dM" , rate / 2); |
| 334 | if (rssi >= 0) |
| 335 | printf(" +%d" , rssi); |
| 336 | printf("\n" ); |
| 337 | if (len > 0) { |
| 338 | for (i = 0; i < len; i++) { |
| 339 | if ((i & 1) == 0) |
| 340 | printf(" " ); |
| 341 | printf("%02x" , buf[i]); |
| 342 | } |
| 343 | printf("\n" ); |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | int |
| 348 | ieee80211_fix_rate(struct ieee80211_node *ni, int flags) |
| 349 | { |
| 350 | #define RV(v) ((v) & IEEE80211_RATE_VAL) |
| 351 | struct ieee80211com *ic = ni->ni_ic; |
| 352 | int i, j, ignore, error; |
| 353 | int okrate, badrate, fixedrate; |
| 354 | struct ieee80211_rateset *srs, *nrs; |
| 355 | u_int8_t r; |
| 356 | |
| 357 | /* |
| 358 | * If the fixed rate check was requested but no |
| 359 | * fixed has been defined then just remove it. |
| 360 | */ |
| 361 | if ((flags & IEEE80211_R_DOFRATE) && |
| 362 | ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) |
| 363 | flags &= ~IEEE80211_R_DOFRATE; |
| 364 | error = 0; |
| 365 | okrate = badrate = fixedrate = 0; |
| 366 | srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)]; |
| 367 | nrs = &ni->ni_rates; |
| 368 | for (i = 0; i < nrs->rs_nrates; ) { |
| 369 | ignore = 0; |
| 370 | if (flags & IEEE80211_R_DOSORT) { |
| 371 | /* |
| 372 | * Sort rates. |
| 373 | */ |
| 374 | for (j = i + 1; j < nrs->rs_nrates; j++) { |
| 375 | if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) { |
| 376 | r = nrs->rs_rates[i]; |
| 377 | nrs->rs_rates[i] = nrs->rs_rates[j]; |
| 378 | nrs->rs_rates[j] = r; |
| 379 | } |
| 380 | } |
| 381 | } |
| 382 | r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; |
| 383 | badrate = r; |
| 384 | if (flags & IEEE80211_R_DOFRATE) { |
| 385 | /* |
| 386 | * Check any fixed rate is included. |
| 387 | */ |
| 388 | if (r == RV(srs->rs_rates[ic->ic_fixed_rate])) |
| 389 | fixedrate = r; |
| 390 | } |
| 391 | if (flags & IEEE80211_R_DONEGO) { |
| 392 | /* |
| 393 | * Check against supported rates. |
| 394 | */ |
| 395 | for (j = 0; j < srs->rs_nrates; j++) { |
| 396 | if (r == RV(srs->rs_rates[j])) { |
| 397 | /* |
| 398 | * Overwrite with the supported rate |
| 399 | * value so any basic rate bit is set. |
| 400 | * This insures that response we send |
| 401 | * to stations have the necessary basic |
| 402 | * rate bit set. |
| 403 | */ |
| 404 | nrs->rs_rates[i] = srs->rs_rates[j]; |
| 405 | break; |
| 406 | } |
| 407 | } |
| 408 | if (j == srs->rs_nrates) { |
| 409 | /* |
| 410 | * A rate in the node's rate set is not |
| 411 | * supported. If this is a basic rate and we |
| 412 | * are operating as an AP then this is an error. |
| 413 | * Otherwise we just discard/ignore the rate. |
| 414 | * Note that this is important for 11b stations |
| 415 | * when they want to associate with an 11g AP. |
| 416 | */ |
| 417 | #ifndef IEEE80211_NO_HOSTAP |
| 418 | if (ic->ic_opmode == IEEE80211_M_HOSTAP && |
| 419 | (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) |
| 420 | error++; |
| 421 | #endif /* !IEEE80211_NO_HOSTAP */ |
| 422 | ignore++; |
| 423 | } |
| 424 | } |
| 425 | if (flags & IEEE80211_R_DODEL) { |
| 426 | /* |
| 427 | * Delete unacceptable rates. |
| 428 | */ |
| 429 | if (ignore) { |
| 430 | nrs->rs_nrates--; |
| 431 | for (j = i; j < nrs->rs_nrates; j++) |
| 432 | nrs->rs_rates[j] = nrs->rs_rates[j + 1]; |
| 433 | nrs->rs_rates[j] = 0; |
| 434 | continue; |
| 435 | } |
| 436 | } |
| 437 | if (!ignore) { |
| 438 | okrate = nrs->rs_rates[i]; |
| 439 | ni->ni_txrate = i; |
| 440 | } |
| 441 | i++; |
| 442 | } |
| 443 | if (okrate == 0 || error != 0 || |
| 444 | ((flags & IEEE80211_R_DOFRATE) && fixedrate == 0)) |
| 445 | return badrate | IEEE80211_RATE_BASIC; |
| 446 | else |
| 447 | return RV(okrate); |
| 448 | #undef RV |
| 449 | } |
| 450 | |
| 451 | /* |
| 452 | * Reset 11g-related state. |
| 453 | */ |
| 454 | void |
| 455 | ieee80211_reset_erp(struct ieee80211com *ic) |
| 456 | { |
| 457 | ic->ic_flags &= ~IEEE80211_F_USEPROT; |
| 458 | ic->ic_nonerpsta = 0; |
| 459 | ic->ic_longslotsta = 0; |
| 460 | /* |
| 461 | * Short slot time is enabled only when operating in 11g |
| 462 | * and not in an IBSS. We must also honor whether or not |
| 463 | * the driver is capable of doing it. |
| 464 | */ |
| 465 | ieee80211_set_shortslottime(ic, |
| 466 | ic->ic_curmode == IEEE80211_MODE_11A || |
| 467 | (ic->ic_curmode == IEEE80211_MODE_11G && |
| 468 | ic->ic_opmode == IEEE80211_M_HOSTAP && |
| 469 | (ic->ic_caps & IEEE80211_C_SHSLOT))); |
| 470 | /* |
| 471 | * Set short preamble and ERP barker-preamble flags. |
| 472 | */ |
| 473 | if (ic->ic_curmode == IEEE80211_MODE_11A || |
| 474 | (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { |
| 475 | ic->ic_flags |= IEEE80211_F_SHPREAMBLE; |
| 476 | ic->ic_flags &= ~IEEE80211_F_USEBARKER; |
| 477 | } else { |
| 478 | ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; |
| 479 | ic->ic_flags |= IEEE80211_F_USEBARKER; |
| 480 | } |
| 481 | } |
| 482 | |
| 483 | /* |
| 484 | * Set the short slot time state and notify the driver. |
| 485 | */ |
| 486 | void |
| 487 | ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) |
| 488 | { |
| 489 | if (onoff) |
| 490 | ic->ic_flags |= IEEE80211_F_SHSLOT; |
| 491 | else |
| 492 | ic->ic_flags &= ~IEEE80211_F_SHSLOT; |
| 493 | /* notify driver */ |
| 494 | if (ic->ic_updateslot != NULL) |
| 495 | ic->ic_updateslot(ic->ic_ifp); |
| 496 | } |
| 497 | |
| 498 | /* |
| 499 | * Check if the specified rate set supports ERP. |
| 500 | * NB: the rate set is assumed to be sorted. |
| 501 | */ |
| 502 | int |
| 503 | ieee80211_iserp_rateset(struct ieee80211com *ic, |
| 504 | struct ieee80211_rateset *rs) |
| 505 | { |
| 506 | #define N(a) (sizeof(a) / sizeof(a[0])) |
| 507 | static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; |
| 508 | int i, j; |
| 509 | |
| 510 | if (rs->rs_nrates < N(rates)) |
| 511 | return 0; |
| 512 | for (i = 0; i < N(rates); i++) { |
| 513 | for (j = 0; j < rs->rs_nrates; j++) { |
| 514 | int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; |
| 515 | if (rates[i] == r) |
| 516 | goto next; |
| 517 | if (r > rates[i]) |
| 518 | return 0; |
| 519 | } |
| 520 | return 0; |
| 521 | next: |
| 522 | ; |
| 523 | } |
| 524 | return 1; |
| 525 | #undef N |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Mark the basic rates for the 11g rate table based on the |
| 530 | * operating mode. For real 11g we mark all the 11b rates |
| 531 | * and 6, 12, and 24 OFDM. For 11b compatibility we mark only |
| 532 | * 11b rates. There's also a pseudo 11a-mode used to mark only |
| 533 | * the basic OFDM rates. |
| 534 | */ |
| 535 | void |
| 536 | ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode) |
| 537 | { |
| 538 | static const struct ieee80211_rateset basic[] = { |
| 539 | { .rs_nrates = 0 }, /* IEEE80211_MODE_AUTO */ |
| 540 | { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11A */ |
| 541 | { 2, { 2, 4 } }, /* IEEE80211_MODE_11B */ |
| 542 | { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11G (mixed b/g) */ |
| 543 | { .rs_nrates = 0 }, /* IEEE80211_MODE_FH */ |
| 544 | /* IEEE80211_MODE_PUREG (not yet) */ |
| 545 | { 7, { 2, 4, 11, 22, 12, 24, 48 } }, |
| 546 | }; |
| 547 | int i, j; |
| 548 | |
| 549 | for (i = 0; i < rs->rs_nrates; i++) { |
| 550 | rs->rs_rates[i] &= IEEE80211_RATE_VAL; |
| 551 | for (j = 0; j < basic[mode].rs_nrates; j++) |
| 552 | if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { |
| 553 | rs->rs_rates[i] |= IEEE80211_RATE_BASIC; |
| 554 | break; |
| 555 | } |
| 556 | } |
| 557 | } |
| 558 | |
| 559 | /* |
| 560 | * WME protocol support. The following parameters come from the spec. |
| 561 | */ |
| 562 | typedef struct phyParamType { |
| 563 | u_int8_t aifsn; |
| 564 | u_int8_t logcwmin; |
| 565 | u_int8_t logcwmax; |
| 566 | u_int16_t txopLimit; |
| 567 | u_int8_t acm; |
| 568 | } paramType; |
| 569 | |
| 570 | static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { |
| 571 | { 3, 4, 6, 0, 0, }, /* IEEE80211_MODE_AUTO */ |
| 572 | { 3, 4, 6, 0, 0, }, /* IEEE80211_MODE_11A */ |
| 573 | { 3, 5, 7, 0, 0, }, /* IEEE80211_MODE_11B */ |
| 574 | { 3, 4, 6, 0, 0, }, /* IEEE80211_MODE_11G */ |
| 575 | { 3, 5, 7, 0, 0, }, /* IEEE80211_MODE_FH */ |
| 576 | { 2, 3, 5, 0, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 577 | { 2, 3, 5, 0, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 578 | }; |
| 579 | static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { |
| 580 | { 7, 4, 10, 0, 0, }, /* IEEE80211_MODE_AUTO */ |
| 581 | { 7, 4, 10, 0, 0, }, /* IEEE80211_MODE_11A */ |
| 582 | { 7, 5, 10, 0, 0, }, /* IEEE80211_MODE_11B */ |
| 583 | { 7, 4, 10, 0, 0, }, /* IEEE80211_MODE_11G */ |
| 584 | { 7, 5, 10, 0, 0, }, /* IEEE80211_MODE_FH */ |
| 585 | { 7, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 586 | { 7, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 587 | }; |
| 588 | static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { |
| 589 | { 1, 3, 4, 94, 0, }, /* IEEE80211_MODE_AUTO */ |
| 590 | { 1, 3, 4, 94, 0, }, /* IEEE80211_MODE_11A */ |
| 591 | { 1, 4, 5, 188, 0, }, /* IEEE80211_MODE_11B */ |
| 592 | { 1, 3, 4, 94, 0, }, /* IEEE80211_MODE_11G */ |
| 593 | { 1, 4, 5, 188, 0, }, /* IEEE80211_MODE_FH */ |
| 594 | { 1, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 595 | { 1, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 596 | }; |
| 597 | static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { |
| 598 | { 1, 2, 3, 47, 0, }, /* IEEE80211_MODE_AUTO */ |
| 599 | { 1, 2, 3, 47, 0, }, /* IEEE80211_MODE_11A */ |
| 600 | { 1, 3, 4, 102, 0, }, /* IEEE80211_MODE_11B */ |
| 601 | { 1, 2, 3, 47, 0, }, /* IEEE80211_MODE_11G */ |
| 602 | { 1, 3, 4, 102, 0, }, /* IEEE80211_MODE_FH */ |
| 603 | { 1, 2, 2, 47, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 604 | { 1, 2, 2, 47, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 605 | }; |
| 606 | |
| 607 | static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { |
| 608 | { 3, 4, 10, 0, 0, }, /* IEEE80211_MODE_AUTO */ |
| 609 | { 3, 4, 10, 0, 0, }, /* IEEE80211_MODE_11A */ |
| 610 | { 3, 5, 10, 0, 0, }, /* IEEE80211_MODE_11B */ |
| 611 | { 3, 4, 10, 0, 0, }, /* IEEE80211_MODE_11G */ |
| 612 | { 3, 5, 10, 0, 0, }, /* IEEE80211_MODE_FH */ |
| 613 | { 2, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 614 | { 2, 3, 10, 0, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 615 | }; |
| 616 | static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { |
| 617 | { 2, 3, 4, 94, 0, }, /* IEEE80211_MODE_AUTO */ |
| 618 | { 2, 3, 4, 94, 0, }, /* IEEE80211_MODE_11A */ |
| 619 | { 2, 4, 5, 188, 0, }, /* IEEE80211_MODE_11B */ |
| 620 | { 2, 3, 4, 94, 0, }, /* IEEE80211_MODE_11G */ |
| 621 | { 2, 4, 5, 188, 0, }, /* IEEE80211_MODE_FH */ |
| 622 | { 2, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 623 | { 2, 2, 3, 94, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 624 | }; |
| 625 | static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { |
| 626 | { 2, 2, 3, 47, 0, }, /* IEEE80211_MODE_AUTO */ |
| 627 | { 2, 2, 3, 47, 0, }, /* IEEE80211_MODE_11A */ |
| 628 | { 2, 3, 4, 102, 0, }, /* IEEE80211_MODE_11B */ |
| 629 | { 2, 2, 3, 47, 0, }, /* IEEE80211_MODE_11G */ |
| 630 | { 2, 3, 4, 102, 0, }, /* IEEE80211_MODE_FH */ |
| 631 | { 1, 2, 2, 47, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 632 | { 1, 2, 2, 47, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 633 | }; |
| 634 | |
| 635 | void |
| 636 | ieee80211_wme_initparams(struct ieee80211com *ic) |
| 637 | { |
| 638 | struct ieee80211_wme_state *wme = &ic->ic_wme; |
| 639 | const paramType *pPhyParam, *pBssPhyParam; |
| 640 | struct wmeParams *wmep; |
| 641 | int i; |
| 642 | |
| 643 | if ((ic->ic_caps & IEEE80211_C_WME) == 0) |
| 644 | return; |
| 645 | |
| 646 | for (i = 0; i < WME_NUM_AC; i++) { |
| 647 | switch (i) { |
| 648 | case WME_AC_BK: |
| 649 | pPhyParam = &phyParamForAC_BK[ic->ic_curmode]; |
| 650 | pBssPhyParam = &phyParamForAC_BK[ic->ic_curmode]; |
| 651 | break; |
| 652 | case WME_AC_VI: |
| 653 | pPhyParam = &phyParamForAC_VI[ic->ic_curmode]; |
| 654 | pBssPhyParam = &bssPhyParamForAC_VI[ic->ic_curmode]; |
| 655 | break; |
| 656 | case WME_AC_VO: |
| 657 | pPhyParam = &phyParamForAC_VO[ic->ic_curmode]; |
| 658 | pBssPhyParam = &bssPhyParamForAC_VO[ic->ic_curmode]; |
| 659 | break; |
| 660 | case WME_AC_BE: |
| 661 | default: |
| 662 | pPhyParam = &phyParamForAC_BE[ic->ic_curmode]; |
| 663 | pBssPhyParam = &bssPhyParamForAC_BE[ic->ic_curmode]; |
| 664 | break; |
| 665 | } |
| 666 | |
| 667 | wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; |
| 668 | if (ic->ic_opmode == IEEE80211_M_HOSTAP) { |
| 669 | wmep->wmep_acm = pPhyParam->acm; |
| 670 | wmep->wmep_aifsn = pPhyParam->aifsn; |
| 671 | wmep->wmep_logcwmin = pPhyParam->logcwmin; |
| 672 | wmep->wmep_logcwmax = pPhyParam->logcwmax; |
| 673 | wmep->wmep_txopLimit = pPhyParam->txopLimit; |
| 674 | } else { |
| 675 | wmep->wmep_acm = pBssPhyParam->acm; |
| 676 | wmep->wmep_aifsn = pBssPhyParam->aifsn; |
| 677 | wmep->wmep_logcwmin = pBssPhyParam->logcwmin; |
| 678 | wmep->wmep_logcwmax = pBssPhyParam->logcwmax; |
| 679 | wmep->wmep_txopLimit = pBssPhyParam->txopLimit; |
| 680 | |
| 681 | } |
| 682 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, |
| 683 | "%s: %s chan [acm %u aifsn %u log2(cwmin) %u " |
| 684 | "log2(cwmax) %u txpoLimit %u]\n" , __func__ |
| 685 | , ieee80211_wme_acnames[i] |
| 686 | , wmep->wmep_acm |
| 687 | , wmep->wmep_aifsn |
| 688 | , wmep->wmep_logcwmin |
| 689 | , wmep->wmep_logcwmax |
| 690 | , wmep->wmep_txopLimit |
| 691 | ); |
| 692 | |
| 693 | wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; |
| 694 | wmep->wmep_acm = pBssPhyParam->acm; |
| 695 | wmep->wmep_aifsn = pBssPhyParam->aifsn; |
| 696 | wmep->wmep_logcwmin = pBssPhyParam->logcwmin; |
| 697 | wmep->wmep_logcwmax = pBssPhyParam->logcwmax; |
| 698 | wmep->wmep_txopLimit = pBssPhyParam->txopLimit; |
| 699 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, |
| 700 | "%s: %s bss [acm %u aifsn %u log2(cwmin) %u " |
| 701 | "log2(cwmax) %u txpoLimit %u]\n" , __func__ |
| 702 | , ieee80211_wme_acnames[i] |
| 703 | , wmep->wmep_acm |
| 704 | , wmep->wmep_aifsn |
| 705 | , wmep->wmep_logcwmin |
| 706 | , wmep->wmep_logcwmax |
| 707 | , wmep->wmep_txopLimit |
| 708 | ); |
| 709 | } |
| 710 | /* NB: check ic_bss to avoid NULL deref on initial attach */ |
| 711 | if (ic->ic_bss != NULL) { |
| 712 | /* |
| 713 | * Calculate agressive mode switching threshold based |
| 714 | * on beacon interval. This doesn't need locking since |
| 715 | * we're only called before entering the RUN state at |
| 716 | * which point we start sending beacon frames. |
| 717 | */ |
| 718 | wme->wme_hipri_switch_thresh = |
| 719 | (HIGH_PRI_SWITCH_THRESH * ic->ic_bss->ni_intval) / 100; |
| 720 | ieee80211_wme_updateparams(ic); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * Update WME parameters for ourself and the BSS. |
| 726 | */ |
| 727 | void |
| 728 | ieee80211_wme_updateparams_locked(struct ieee80211com *ic) |
| 729 | { |
| 730 | static const paramType phyParam[IEEE80211_MODE_MAX] = { |
| 731 | { 2, 4, 10, 64, 0, }, /* IEEE80211_MODE_AUTO */ |
| 732 | { 2, 4, 10, 64, 0, }, /* IEEE80211_MODE_11A */ |
| 733 | { 2, 5, 10, 64, 0, }, /* IEEE80211_MODE_11B */ |
| 734 | { 2, 4, 10, 64, 0, }, /* IEEE80211_MODE_11G */ |
| 735 | { 2, 5, 10, 64, 0, }, /* IEEE80211_MODE_FH */ |
| 736 | { 1, 3, 10, 64, 0, }, /* IEEE80211_MODE_TURBO_A */ |
| 737 | { 1, 3, 10, 64, 0, }, /* IEEE80211_MODE_TURBO_G */ |
| 738 | }; |
| 739 | struct ieee80211_wme_state *wme = &ic->ic_wme; |
| 740 | const struct wmeParams *wmep; |
| 741 | struct wmeParams *chanp, *bssp; |
| 742 | int i; |
| 743 | |
| 744 | /* set up the channel access parameters for the physical device */ |
| 745 | for (i = 0; i < WME_NUM_AC; i++) { |
| 746 | chanp = &wme->wme_chanParams.cap_wmeParams[i]; |
| 747 | wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; |
| 748 | chanp->wmep_aifsn = wmep->wmep_aifsn; |
| 749 | chanp->wmep_logcwmin = wmep->wmep_logcwmin; |
| 750 | chanp->wmep_logcwmax = wmep->wmep_logcwmax; |
| 751 | chanp->wmep_txopLimit = wmep->wmep_txopLimit; |
| 752 | |
| 753 | chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; |
| 754 | wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; |
| 755 | chanp->wmep_aifsn = wmep->wmep_aifsn; |
| 756 | chanp->wmep_logcwmin = wmep->wmep_logcwmin; |
| 757 | chanp->wmep_logcwmax = wmep->wmep_logcwmax; |
| 758 | chanp->wmep_txopLimit = wmep->wmep_txopLimit; |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * This implements agressive mode as found in certain |
| 763 | * vendors' AP's. When there is significant high |
| 764 | * priority (VI/VO) traffic in the BSS throttle back BE |
| 765 | * traffic by using conservative parameters. Otherwise |
| 766 | * BE uses agressive params to optimize performance of |
| 767 | * legacy/non-QoS traffic. |
| 768 | */ |
| 769 | if ((ic->ic_opmode == IEEE80211_M_HOSTAP && |
| 770 | (wme->wme_flags & WME_F_AGGRMODE) == 0) || |
| 771 | (ic->ic_opmode != IEEE80211_M_HOSTAP && |
| 772 | (ic->ic_bss->ni_flags & IEEE80211_NODE_QOS) == 0) || |
| 773 | (ic->ic_flags & IEEE80211_F_WME) == 0) { |
| 774 | chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; |
| 775 | bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; |
| 776 | |
| 777 | chanp->wmep_aifsn = bssp->wmep_aifsn = |
| 778 | phyParam[ic->ic_curmode].aifsn; |
| 779 | chanp->wmep_logcwmin = bssp->wmep_logcwmin = |
| 780 | phyParam[ic->ic_curmode].logcwmin; |
| 781 | chanp->wmep_logcwmax = bssp->wmep_logcwmax = |
| 782 | phyParam[ic->ic_curmode].logcwmax; |
| 783 | chanp->wmep_txopLimit = bssp->wmep_txopLimit = |
| 784 | (ic->ic_caps & IEEE80211_C_BURST) ? |
| 785 | phyParam[ic->ic_curmode].txopLimit : 0; |
| 786 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, |
| 787 | "%s: %s [acm %u aifsn %u log2(cwmin) %u " |
| 788 | "log2(cwmax) %u txpoLimit %u]\n" , __func__ |
| 789 | , ieee80211_wme_acnames[WME_AC_BE] |
| 790 | , chanp->wmep_acm |
| 791 | , chanp->wmep_aifsn |
| 792 | , chanp->wmep_logcwmin |
| 793 | , chanp->wmep_logcwmax |
| 794 | , chanp->wmep_txopLimit |
| 795 | ); |
| 796 | } |
| 797 | |
| 798 | #ifndef IEEE80211_NO_HOSTAP |
| 799 | if (ic->ic_opmode == IEEE80211_M_HOSTAP && |
| 800 | ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) == 0) { |
| 801 | static const u_int8_t logCwMin[IEEE80211_MODE_MAX] = { |
| 802 | 3, /* IEEE80211_MODE_AUTO */ |
| 803 | 3, /* IEEE80211_MODE_11A */ |
| 804 | 4, /* IEEE80211_MODE_11B */ |
| 805 | 3, /* IEEE80211_MODE_11G */ |
| 806 | 4, /* IEEE80211_MODE_FH */ |
| 807 | 3, /* IEEE80211_MODE_TURBO_A */ |
| 808 | 3, /* IEEE80211_MODE_TURBO_G */ |
| 809 | }; |
| 810 | chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; |
| 811 | bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; |
| 812 | |
| 813 | chanp->wmep_logcwmin = bssp->wmep_logcwmin = |
| 814 | logCwMin[ic->ic_curmode]; |
| 815 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, |
| 816 | "%s: %s log2(cwmin) %u\n" , __func__ |
| 817 | , ieee80211_wme_acnames[WME_AC_BE] |
| 818 | , chanp->wmep_logcwmin |
| 819 | ); |
| 820 | } |
| 821 | if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */ |
| 822 | /* |
| 823 | * Arrange for a beacon update and bump the parameter |
| 824 | * set number so associated stations load the new values. |
| 825 | */ |
| 826 | wme->wme_bssChanParams.cap_info = |
| 827 | (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; |
| 828 | ic->ic_flags |= IEEE80211_F_WMEUPDATE; |
| 829 | } |
| 830 | #endif /* !IEEE80211_NO_HOSTAP */ |
| 831 | |
| 832 | wme->wme_update(ic); |
| 833 | |
| 834 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, |
| 835 | "%s: WME params updated, cap_info 0x%x\n" , __func__, |
| 836 | ic->ic_opmode == IEEE80211_M_STA ? |
| 837 | wme->wme_wmeChanParams.cap_info : |
| 838 | wme->wme_bssChanParams.cap_info); |
| 839 | } |
| 840 | |
| 841 | void |
| 842 | ieee80211_wme_updateparams(struct ieee80211com *ic) |
| 843 | { |
| 844 | |
| 845 | if (ic->ic_caps & IEEE80211_C_WME) { |
| 846 | IEEE80211_BEACON_LOCK(ic); |
| 847 | ieee80211_wme_updateparams_locked(ic); |
| 848 | IEEE80211_BEACON_UNLOCK(ic); |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | #ifndef IEEE80211_NO_HOSTAP |
| 853 | static void |
| 854 | sta_disassoc(void *arg, struct ieee80211_node *ni) |
| 855 | { |
| 856 | struct ieee80211com *ic = arg; |
| 857 | |
| 858 | if (ni->ni_associd != 0) { |
| 859 | IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DISASSOC, |
| 860 | IEEE80211_REASON_ASSOC_LEAVE); |
| 861 | ieee80211_node_leave(ic, ni); |
| 862 | } |
| 863 | } |
| 864 | #endif /* !IEEE80211_NO_HOSTAP */ |
| 865 | |
| 866 | void |
| 867 | ieee80211_beacon_miss(struct ieee80211com *ic) |
| 868 | { |
| 869 | |
| 870 | if (ic->ic_flags & IEEE80211_F_SCAN) { |
| 871 | /* XXX check ic_curchan != ic_bsschan? */ |
| 872 | return; |
| 873 | } |
| 874 | IEEE80211_DPRINTF(ic, |
| 875 | IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, |
| 876 | "%s\n" , "beacon miss" ); |
| 877 | |
| 878 | /* |
| 879 | * Our handling is only meaningful for stations that are |
| 880 | * associated; any other conditions else will be handled |
| 881 | * through different means (e.g. the tx timeout on mgt frames). |
| 882 | */ |
| 883 | if (ic->ic_opmode != IEEE80211_M_STA || ic->ic_state != IEEE80211_S_RUN) |
| 884 | return; |
| 885 | |
| 886 | if (++ic->ic_bmiss_count < ic->ic_bmiss_max) { |
| 887 | /* |
| 888 | * Send a directed probe req before falling back to a scan; |
| 889 | * if we receive a response ic_bmiss_count will be reset. |
| 890 | * Some cards mistakenly report beacon miss so this avoids |
| 891 | * the expensive scan if the ap is still there. |
| 892 | */ |
| 893 | ieee80211_send_probereq(ic->ic_bss, ic->ic_myaddr, |
| 894 | ic->ic_bss->ni_bssid, ic->ic_bss->ni_bssid, |
| 895 | ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen, |
| 896 | ic->ic_opt_ie, ic->ic_opt_ie_len); |
| 897 | return; |
| 898 | } |
| 899 | ic->ic_bmiss_count = 0; |
| 900 | ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); |
| 901 | } |
| 902 | |
| 903 | #ifndef IEEE80211_NO_HOSTAP |
| 904 | static void |
| 905 | sta_deauth(void *arg, struct ieee80211_node *ni) |
| 906 | { |
| 907 | struct ieee80211com *ic = arg; |
| 908 | |
| 909 | IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH, |
| 910 | IEEE80211_REASON_ASSOC_LEAVE); |
| 911 | } |
| 912 | #endif /* !IEEE80211_NO_HOSTAP */ |
| 913 | |
| 914 | static int |
| 915 | ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) |
| 916 | { |
| 917 | struct ifnet *ifp = ic->ic_ifp; |
| 918 | struct ieee80211_node *ni; |
| 919 | enum ieee80211_state ostate; |
| 920 | |
| 921 | ostate = ic->ic_state; |
| 922 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE, "%s: %s -> %s\n" , __func__, |
| 923 | ieee80211_state_name[ostate], ieee80211_state_name[nstate]); |
| 924 | ic->ic_state = nstate; /* state transition */ |
| 925 | ni = ic->ic_bss; /* NB: no reference held */ |
| 926 | switch (nstate) { |
| 927 | case IEEE80211_S_INIT: |
| 928 | switch (ostate) { |
| 929 | case IEEE80211_S_INIT: |
| 930 | break; |
| 931 | case IEEE80211_S_RUN: |
| 932 | switch (ic->ic_opmode) { |
| 933 | case IEEE80211_M_STA: |
| 934 | IEEE80211_SEND_MGMT(ic, ni, |
| 935 | IEEE80211_FC0_SUBTYPE_DISASSOC, |
| 936 | IEEE80211_REASON_ASSOC_LEAVE); |
| 937 | ieee80211_sta_leave(ic, ni); |
| 938 | break; |
| 939 | case IEEE80211_M_HOSTAP: |
| 940 | #ifndef IEEE80211_NO_HOSTAP |
| 941 | ieee80211_iterate_nodes(&ic->ic_sta, |
| 942 | sta_disassoc, ic); |
| 943 | #endif /* !IEEE80211_NO_HOSTAP */ |
| 944 | break; |
| 945 | default: |
| 946 | break; |
| 947 | } |
| 948 | goto reset; |
| 949 | case IEEE80211_S_ASSOC: |
| 950 | switch (ic->ic_opmode) { |
| 951 | case IEEE80211_M_STA: |
| 952 | IEEE80211_SEND_MGMT(ic, ni, |
| 953 | IEEE80211_FC0_SUBTYPE_DEAUTH, |
| 954 | IEEE80211_REASON_AUTH_LEAVE); |
| 955 | break; |
| 956 | case IEEE80211_M_HOSTAP: |
| 957 | #ifndef IEEE80211_NO_HOSTAP |
| 958 | ieee80211_iterate_nodes(&ic->ic_sta, |
| 959 | sta_deauth, ic); |
| 960 | #endif /* !IEEE80211_NO_HOSTAP */ |
| 961 | break; |
| 962 | default: |
| 963 | break; |
| 964 | } |
| 965 | goto reset; |
| 966 | case IEEE80211_S_SCAN: |
| 967 | ieee80211_cancel_scan(ic); |
| 968 | goto reset; |
| 969 | case IEEE80211_S_AUTH: |
| 970 | reset: |
| 971 | ic->ic_mgt_timer = 0; |
| 972 | ieee80211_drain_ifq(&ic->ic_mgtq); |
| 973 | ieee80211_reset_bss(ic); |
| 974 | break; |
| 975 | } |
| 976 | if (ic->ic_auth->ia_detach != NULL) |
| 977 | ic->ic_auth->ia_detach(ic); |
| 978 | break; |
| 979 | case IEEE80211_S_SCAN: |
| 980 | switch (ostate) { |
| 981 | case IEEE80211_S_INIT: |
| 982 | if ((ic->ic_opmode == IEEE80211_M_HOSTAP || |
| 983 | ic->ic_opmode == IEEE80211_M_IBSS || |
| 984 | ic->ic_opmode == IEEE80211_M_AHDEMO) && |
| 985 | ic->ic_des_chan != IEEE80211_CHAN_ANYC) { |
| 986 | /* |
| 987 | * AP operation and we already have a channel; |
| 988 | * bypass the scan and startup immediately. |
| 989 | */ |
| 990 | ieee80211_create_ibss(ic, ic->ic_des_chan); |
| 991 | } else { |
| 992 | ieee80211_begin_scan(ic, arg); |
| 993 | } |
| 994 | break; |
| 995 | case IEEE80211_S_SCAN: |
| 996 | /* |
| 997 | * Scan next. If doing an active scan probe |
| 998 | * for the requested ap (if any). |
| 999 | */ |
| 1000 | if (ic->ic_flags & IEEE80211_F_ASCAN) |
| 1001 | ieee80211_probe_curchan(ic, 0); |
| 1002 | break; |
| 1003 | case IEEE80211_S_RUN: |
| 1004 | /* beacon miss */ |
| 1005 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE, |
| 1006 | "no recent beacons from %s; rescanning\n" , |
| 1007 | ether_sprintf(ic->ic_bss->ni_bssid)); |
| 1008 | ieee80211_sta_leave(ic, ni); |
| 1009 | ic->ic_flags &= ~IEEE80211_F_SIBSS; /* XXX */ |
| 1010 | /* FALLTHRU */ |
| 1011 | case IEEE80211_S_AUTH: |
| 1012 | case IEEE80211_S_ASSOC: |
| 1013 | /* timeout restart scan */ |
| 1014 | ni = ieee80211_find_node(&ic->ic_scan, |
| 1015 | ic->ic_bss->ni_macaddr); |
| 1016 | if (ni != NULL) { |
| 1017 | ni->ni_fails++; |
| 1018 | ieee80211_unref_node(&ni); |
| 1019 | } |
| 1020 | if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) |
| 1021 | ieee80211_begin_scan(ic, arg); |
| 1022 | break; |
| 1023 | } |
| 1024 | break; |
| 1025 | case IEEE80211_S_AUTH: |
| 1026 | switch (ostate) { |
| 1027 | case IEEE80211_S_INIT: |
| 1028 | case IEEE80211_S_SCAN: |
| 1029 | IEEE80211_SEND_MGMT(ic, ni, |
| 1030 | IEEE80211_FC0_SUBTYPE_AUTH, 1); |
| 1031 | break; |
| 1032 | case IEEE80211_S_AUTH: |
| 1033 | case IEEE80211_S_ASSOC: |
| 1034 | switch (arg) { |
| 1035 | case IEEE80211_FC0_SUBTYPE_AUTH: |
| 1036 | /* ??? */ |
| 1037 | IEEE80211_SEND_MGMT(ic, ni, |
| 1038 | IEEE80211_FC0_SUBTYPE_AUTH, 2); |
| 1039 | break; |
| 1040 | case IEEE80211_FC0_SUBTYPE_DEAUTH: |
| 1041 | /* ignore and retry scan on timeout */ |
| 1042 | break; |
| 1043 | } |
| 1044 | break; |
| 1045 | case IEEE80211_S_RUN: |
| 1046 | switch (arg) { |
| 1047 | case IEEE80211_FC0_SUBTYPE_AUTH: |
| 1048 | IEEE80211_SEND_MGMT(ic, ni, |
| 1049 | IEEE80211_FC0_SUBTYPE_AUTH, 2); |
| 1050 | ic->ic_state = ostate; /* stay RUN */ |
| 1051 | break; |
| 1052 | case IEEE80211_FC0_SUBTYPE_DEAUTH: |
| 1053 | ieee80211_sta_leave(ic, ni); |
| 1054 | if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) { |
| 1055 | /* try to reauth */ |
| 1056 | IEEE80211_SEND_MGMT(ic, ni, |
| 1057 | IEEE80211_FC0_SUBTYPE_AUTH, 1); |
| 1058 | } |
| 1059 | break; |
| 1060 | } |
| 1061 | break; |
| 1062 | } |
| 1063 | break; |
| 1064 | case IEEE80211_S_ASSOC: |
| 1065 | switch (ostate) { |
| 1066 | case IEEE80211_S_INIT: |
| 1067 | case IEEE80211_S_SCAN: |
| 1068 | case IEEE80211_S_ASSOC: |
| 1069 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 1070 | "%s: invalid transition\n" , __func__); |
| 1071 | break; |
| 1072 | case IEEE80211_S_AUTH: |
| 1073 | IEEE80211_SEND_MGMT(ic, ni, |
| 1074 | IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); |
| 1075 | break; |
| 1076 | case IEEE80211_S_RUN: |
| 1077 | ieee80211_sta_leave(ic, ni); |
| 1078 | if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) { |
| 1079 | IEEE80211_SEND_MGMT(ic, ni, |
| 1080 | IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1); |
| 1081 | } |
| 1082 | break; |
| 1083 | } |
| 1084 | break; |
| 1085 | case IEEE80211_S_RUN: |
| 1086 | if (ic->ic_flags & IEEE80211_F_WPA) { |
| 1087 | /* XXX validate prerequisites */ |
| 1088 | } |
| 1089 | switch (ostate) { |
| 1090 | case IEEE80211_S_INIT: |
| 1091 | if (ic->ic_opmode == IEEE80211_M_MONITOR) |
| 1092 | break; |
| 1093 | /* fall thru... */ |
| 1094 | case IEEE80211_S_AUTH: |
| 1095 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 1096 | "%s: invalid transition\n" , __func__); |
| 1097 | /* fall thru... */ |
| 1098 | case IEEE80211_S_RUN: |
| 1099 | break; |
| 1100 | case IEEE80211_S_SCAN: /* adhoc/hostap mode */ |
| 1101 | case IEEE80211_S_ASSOC: /* infra mode */ |
| 1102 | IASSERT(ni->ni_txrate < ni->ni_rates.rs_nrates, |
| 1103 | ("%s: bogus xmit rate %u setup\n" , __func__, |
| 1104 | ni->ni_txrate)); |
| 1105 | #ifdef IEEE80211_DEBUG |
| 1106 | if (ieee80211_msg_debug(ic)) { |
| 1107 | if (ic->ic_opmode == IEEE80211_M_STA) |
| 1108 | if_printf(ifp, "associated " ); |
| 1109 | else |
| 1110 | if_printf(ifp, "synchronized " ); |
| 1111 | printf("with %s ssid " , |
| 1112 | ether_sprintf(ni->ni_bssid)); |
| 1113 | ieee80211_print_essid(ic->ic_bss->ni_essid, |
| 1114 | ni->ni_esslen); |
| 1115 | printf(" channel %d start %uMb\n" , |
| 1116 | ieee80211_chan2ieee(ic, ic->ic_curchan), |
| 1117 | IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate])); |
| 1118 | } |
| 1119 | #endif |
| 1120 | ic->ic_mgt_timer = 0; |
| 1121 | if (ic->ic_opmode == IEEE80211_M_STA) |
| 1122 | ieee80211_notify_node_join(ic, ni, |
| 1123 | arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); |
| 1124 | if_start_lock(ifp); /* XXX not authorized yet */ |
| 1125 | break; |
| 1126 | } |
| 1127 | /* |
| 1128 | * Start/stop the authenticator when operating as an |
| 1129 | * AP. We delay until here to allow configuration to |
| 1130 | * happen out of order. |
| 1131 | */ |
| 1132 | if (ic->ic_opmode == IEEE80211_M_HOSTAP && /* XXX IBSS/AHDEMO */ |
| 1133 | ic->ic_auth->ia_attach != NULL) { |
| 1134 | /* XXX check failure */ |
| 1135 | ic->ic_auth->ia_attach(ic); |
| 1136 | } else if (ic->ic_auth->ia_detach != NULL) { |
| 1137 | ic->ic_auth->ia_detach(ic); |
| 1138 | } |
| 1139 | /* |
| 1140 | * When 802.1x is not in use mark the port authorized |
| 1141 | * at this point so traffic can flow. |
| 1142 | */ |
| 1143 | if (ni->ni_authmode != IEEE80211_AUTH_8021X) |
| 1144 | ieee80211_node_authorize(ni); |
| 1145 | /* |
| 1146 | * Enable inactivity processing. |
| 1147 | * XXX |
| 1148 | */ |
| 1149 | ic->ic_scan.nt_inact_timer = IEEE80211_INACT_WAIT; |
| 1150 | ic->ic_sta.nt_inact_timer = IEEE80211_INACT_WAIT; |
| 1151 | break; |
| 1152 | } |
| 1153 | return 0; |
| 1154 | } |
| 1155 | |