1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "opt_inet.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/mbuf.h> 41 #include <sys/kernel.h> 42 #include <sys/endian.h> 43 44 #include <sys/socket.h> 45 46 #include <net/bpf.h> 47 #include <net/ethernet.h> 48 #include <net/if.h> 49 #include <net/if_llc.h> 50 #include <net/if_media.h> 51 #include <net/if_vlan_var.h> 52 53 #include <net80211/ieee80211_var.h> 54 55 #ifdef INET 56 #include <netinet/in.h> 57 #include <netinet/if_ether.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/ip.h> 60 #endif 61 62 #ifdef IEEE80211_DEBUG 63 /* 64 * Decide if an outbound management frame should be 65 * printed when debugging is enabled. This filters some 66 * of the less interesting frames that come frequently 67 * (e.g. beacons). 68 */ 69 static __inline int 70 doprint(struct ieee80211com *ic, int subtype) 71 { 72 switch (subtype) { 73 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 74 return (ic->ic_opmode == IEEE80211_M_IBSS); 75 } 76 return 1; 77 } 78 #endif 79 80 /* 81 * Send a management frame to the specified node. The node pointer 82 * must have a reference as the pointer will be passed to the driver 83 * and potentially held for a long time. If the frame is successfully 84 * dispatched to the driver, then it is responsible for freeing the 85 * reference (and potentially free'ing up any associated storage). 86 */ 87 static int 88 ieee80211_mgmt_output(struct ieee80211com *ic, struct ieee80211_node *ni, 89 struct mbuf *m, int type) 90 { 91 struct ifnet *ifp = ic->ic_ifp; 92 struct ieee80211_frame *wh; 93 94 KASSERT(ni != NULL, ("null node")); 95 96 /* 97 * Yech, hack alert! We want to pass the node down to the 98 * driver's start routine. If we don't do so then the start 99 * routine must immediately look it up again and that can 100 * cause a lock order reversal if, for example, this frame 101 * is being sent because the station is being timedout and 102 * the frame being sent is a DEAUTH message. We could stick 103 * this in an m_tag and tack that on to the mbuf. However 104 * that's rather expensive to do for every frame so instead 105 * we stuff it in the rcvif field since outbound frames do 106 * not (presently) use this. 107 */ 108 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 109 if (m == NULL) 110 return ENOMEM; 111 KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null")); 112 m->m_pkthdr.rcvif = (void *)ni; 113 114 wh = mtod(m, struct ieee80211_frame *); 115 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | type; 116 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 117 *(u_int16_t *)wh->i_dur = 0; 118 *(u_int16_t *)wh->i_seq = 119 htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); 120 ni->ni_txseqs[0]++; 121 /* 122 * Hack. When sending PROBE_REQ frames while scanning we 123 * explicitly force a broadcast rather than (as before) clobber 124 * ni_macaddr and ni_bssid. This is stopgap, we need a way 125 * to communicate this directly rather than do something 126 * implicit based on surrounding state. 127 */ 128 if (type == IEEE80211_FC0_SUBTYPE_PROBE_REQ && 129 (ic->ic_flags & IEEE80211_F_SCAN)) { 130 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 131 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 132 IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr); 133 } else { 134 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 135 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 136 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 137 } 138 139 if ((m->m_flags & M_LINK0) != 0 && ni->ni_challenge != NULL) { 140 m->m_flags &= ~M_LINK0; 141 IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, 142 "[%s] encrypting frame (%s)\n", 143 ether_sprintf(wh->i_addr1), __func__); 144 wh->i_fc[1] |= IEEE80211_FC1_WEP; 145 } 146 #ifdef IEEE80211_DEBUG 147 /* avoid printing too many frames */ 148 if ((ieee80211_msg_debug(ic) && doprint(ic, type)) || 149 ieee80211_msg_dumppkts(ic)) { 150 printf("[%s] send %s on channel %u\n", 151 ether_sprintf(wh->i_addr1), 152 ieee80211_mgt_subtype_name[ 153 (type & IEEE80211_FC0_SUBTYPE_MASK) >> 154 IEEE80211_FC0_SUBTYPE_SHIFT], 155 ieee80211_chan2ieee(ic, ni->ni_chan)); 156 } 157 #endif 158 IEEE80211_NODE_STAT(ni, tx_mgmt); 159 IF_ENQUEUE(&ic->ic_mgtq, m); 160 ifp->if_timer = 1; 161 if_start(ifp); 162 return 0; 163 } 164 165 /* 166 * Send a null data frame to the specified node. 167 */ 168 int 169 ieee80211_send_nulldata(struct ieee80211com *ic, struct ieee80211_node *ni) 170 { 171 struct ifnet *ifp = ic->ic_ifp; 172 struct mbuf *m; 173 struct ieee80211_frame *wh; 174 175 MGETHDR(m, M_NOWAIT, MT_HEADER); 176 if (m == NULL) { 177 /* XXX debug msg */ 178 ic->ic_stats.is_tx_nobuf++; 179 return ENOMEM; 180 } 181 m->m_pkthdr.rcvif = (void *) ieee80211_ref_node(ni); 182 183 wh = mtod(m, struct ieee80211_frame *); 184 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA | 185 IEEE80211_FC0_SUBTYPE_NODATA; 186 *(u_int16_t *)wh->i_dur = 0; 187 *(u_int16_t *)wh->i_seq = 188 htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); 189 ni->ni_txseqs[0]++; 190 191 /* XXX WDS */ 192 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 193 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 194 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 195 IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_myaddr); 196 m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame); 197 198 IEEE80211_NODE_STAT(ni, tx_data); 199 200 IF_ENQUEUE(&ic->ic_mgtq, m); /* cheat */ 201 if_start(ifp); 202 203 return 0; 204 } 205 206 /* 207 * Assign priority to a frame based on any vlan tag assigned 208 * to the station and/or any Diffserv setting in an IP header. 209 * Finally, if an ACM policy is setup (in station mode) it's 210 * applied. 211 */ 212 int 213 ieee80211_classify(struct ieee80211com *ic, struct mbuf *m, struct ieee80211_node *ni) 214 { 215 int v_wme_ac, d_wme_ac, ac; 216 #ifdef INET 217 struct ether_header *eh; 218 #endif 219 220 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 221 ac = WME_AC_BE; 222 goto done; 223 } 224 225 /* 226 * If node has a vlan tag then all traffic 227 * to it must have a matching tag. 228 */ 229 v_wme_ac = 0; 230 if (ni->ni_vlan != 0) { 231 struct m_tag *mtag = VLAN_OUTPUT_TAG(ic->ic_ifp, m); 232 if (mtag != NULL) { 233 IEEE80211_NODE_STAT(ni, tx_novlantag); 234 return 1; 235 } 236 if (EVL_VLANOFTAG(VLAN_TAG_VALUE(mtag)) != 237 EVL_VLANOFTAG(ni->ni_vlan)) { 238 IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 239 return 1; 240 } 241 /* map vlan priority to AC */ 242 switch (EVL_PRIOFTAG(ni->ni_vlan)) { 243 case 1: 244 case 2: 245 v_wme_ac = WME_AC_BK; 246 break; 247 case 0: 248 case 3: 249 v_wme_ac = WME_AC_BE; 250 break; 251 case 4: 252 case 5: 253 v_wme_ac = WME_AC_VI; 254 break; 255 case 6: 256 case 7: 257 v_wme_ac = WME_AC_VO; 258 break; 259 } 260 } 261 262 #ifdef INET 263 eh = mtod(m, struct ether_header *); 264 if (eh->ether_type == htons(ETHERTYPE_IP)) { 265 const struct ip *ip = (struct ip *) 266 (mtod(m, u_int8_t *) + sizeof (*eh)); 267 /* 268 * IP frame, map the TOS field. 269 */ 270 switch (ip->ip_tos) { 271 case 0x08: 272 case 0x20: 273 d_wme_ac = WME_AC_BK; /* background */ 274 break; 275 case 0x28: 276 case 0xa0: 277 d_wme_ac = WME_AC_VI; /* video */ 278 break; 279 case 0x30: /* voice */ 280 case 0xe0: 281 case 0x88: /* XXX UPSD */ 282 case 0xb8: 283 d_wme_ac = WME_AC_VO; 284 break; 285 default: 286 d_wme_ac = WME_AC_BE; 287 break; 288 } 289 } else { 290 #endif /* INET */ 291 d_wme_ac = WME_AC_BE; 292 #ifdef INET 293 } 294 #endif 295 /* 296 * Use highest priority AC. 297 */ 298 if (v_wme_ac > d_wme_ac) 299 ac = v_wme_ac; 300 else 301 ac = d_wme_ac; 302 303 /* 304 * Apply ACM policy. 305 */ 306 if (ic->ic_opmode == IEEE80211_M_STA) { 307 static const int acmap[4] = { 308 WME_AC_BK, /* WME_AC_BE */ 309 WME_AC_BK, /* WME_AC_BK */ 310 WME_AC_BE, /* WME_AC_VI */ 311 WME_AC_VI, /* WME_AC_VO */ 312 }; 313 while (ac != WME_AC_BK && 314 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 315 ac = acmap[ac]; 316 } 317 done: 318 M_WME_SETAC(m, ac); 319 return 0; 320 } 321 322 /* 323 * Insure there is sufficient contiguous space to encapsulate the 324 * 802.11 data frame. If room isn't already there, arrange for it. 325 * Drivers and cipher modules assume we have done the necessary work 326 * and fail rudely if they don't find the space they need. 327 */ 328 static struct mbuf * 329 ieee80211_mbuf_adjust(struct ieee80211com *ic, int hdrsize, 330 struct ieee80211_key *key, struct mbuf *m) 331 { 332 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 333 int needed_space = hdrsize; 334 335 if (key != NULL) { 336 /* XXX belongs in crypto code? */ 337 needed_space += key->wk_cipher->ic_header; 338 /* XXX frags */ 339 } 340 /* 341 * We know we are called just before stripping an Ethernet 342 * header and prepending an LLC header. This means we know 343 * there will be 344 * sizeof(struct ether_header) - sizeof(struct llc) 345 * bytes recovered to which we need additional space for the 346 * 802.11 header and any crypto header. 347 */ 348 /* XXX check trailing space and copy instead? */ 349 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 350 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 351 if (n == NULL) { 352 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 353 "%s: cannot expand storage\n", __func__); 354 ic->ic_stats.is_tx_nobuf++; 355 m_freem(m); 356 return NULL; 357 } 358 KASSERT(needed_space <= MHLEN, 359 ("not enough room, need %u got %zu\n", needed_space, MHLEN)); 360 /* 361 * Setup new mbuf to have leading space to prepend the 362 * 802.11 header and any crypto header bits that are 363 * required (the latter are added when the driver calls 364 * back to ieee80211_crypto_encap to do crypto encapsulation). 365 */ 366 /* NB: must be first 'cuz it clobbers m_data */ 367 m_move_pkthdr(n, m); 368 n->m_len = 0; /* NB: m_gethdr does not set */ 369 n->m_data += needed_space; 370 /* 371 * Pull up Ethernet header to create the expected layout. 372 * We could use m_pullup but that's overkill (i.e. we don't 373 * need the actual data) and it cannot fail so do it inline 374 * for speed. 375 */ 376 /* NB: struct ether_header is known to be contiguous */ 377 n->m_len += sizeof(struct ether_header); 378 m->m_len -= sizeof(struct ether_header); 379 m->m_data += sizeof(struct ether_header); 380 /* 381 * Replace the head of the chain. 382 */ 383 n->m_next = m; 384 m = n; 385 } 386 return m; 387 #undef TO_BE_RECLAIMED 388 } 389 390 #define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none) 391 /* 392 * Return the transmit key to use in sending a unicast frame. 393 * If a unicast key is set we use that. When no unicast key is set 394 * we fall back to the default transmit key. 395 */ 396 static __inline struct ieee80211_key * 397 ieee80211_crypto_getucastkey(struct ieee80211com *ic, struct ieee80211_node *ni) 398 { 399 if (KEY_UNDEFINED(ni->ni_ucastkey)) { 400 if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE || 401 KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey])) 402 return NULL; 403 return &ic->ic_nw_keys[ic->ic_def_txkey]; 404 } else { 405 return &ni->ni_ucastkey; 406 } 407 } 408 409 /* 410 * Return the transmit key to use in sending a multicast frame. 411 * Multicast traffic always uses the group key which is installed as 412 * the default tx key. 413 */ 414 static __inline struct ieee80211_key * 415 ieee80211_crypto_getmcastkey(struct ieee80211com *ic, struct ieee80211_node *ni) 416 { 417 if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE || 418 KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey])) 419 return NULL; 420 return &ic->ic_nw_keys[ic->ic_def_txkey]; 421 } 422 423 /* 424 * Encapsulate an outbound data frame. The mbuf chain is updated. 425 * If an error is encountered NULL is returned. The caller is required 426 * to provide a node reference and pullup the ethernet header in the 427 * first mbuf. 428 */ 429 struct mbuf * 430 ieee80211_encap(struct ieee80211com *ic, struct mbuf *m, 431 struct ieee80211_node *ni) 432 { 433 struct ether_header eh; 434 struct ieee80211_frame *wh; 435 struct ieee80211_key *key; 436 struct llc *llc; 437 int hdrsize, datalen, addqos; 438 439 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 440 memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header)); 441 442 /* 443 * Insure space for additional headers. First identify 444 * transmit key to use in calculating any buffer adjustments 445 * required. This is also used below to do privacy 446 * encapsulation work. Then calculate the 802.11 header 447 * size and any padding required by the driver. 448 * 449 * Note key may be NULL if we fall back to the default 450 * transmit key and that is not set. In that case the 451 * buffer may not be expanded as needed by the cipher 452 * routines, but they will/should discard it. 453 */ 454 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 455 if (ic->ic_opmode == IEEE80211_M_STA || 456 !IEEE80211_IS_MULTICAST(eh.ether_dhost)) 457 key = ieee80211_crypto_getucastkey(ic, ni); 458 else 459 key = ieee80211_crypto_getmcastkey(ic, ni); 460 if (key == NULL && eh.ether_type != htons(ETHERTYPE_PAE)) { 461 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 462 "[%s] no default transmit key (%s) deftxkey %u\n", 463 ether_sprintf(eh.ether_dhost), __func__, 464 ic->ic_def_txkey); 465 ic->ic_stats.is_tx_nodefkey++; 466 } 467 } else 468 key = NULL; 469 /* XXX 4-address format */ 470 /* 471 * XXX Some ap's don't handle QoS-encapsulated EAPOL 472 * frames so suppress use. This may be an issue if other 473 * ap's require all data frames to be QoS-encapsulated 474 * once negotiated in which case we'll need to make this 475 * configurable. 476 */ 477 addqos = (ni->ni_flags & IEEE80211_NODE_QOS) && 478 eh.ether_type != htons(ETHERTYPE_PAE); 479 if (addqos) 480 hdrsize = sizeof(struct ieee80211_qosframe); 481 else 482 hdrsize = sizeof(struct ieee80211_frame); 483 if (ic->ic_flags & IEEE80211_F_DATAPAD) 484 hdrsize = roundup(hdrsize, sizeof(u_int32_t)); 485 m = ieee80211_mbuf_adjust(ic, hdrsize, key, m); 486 if (m == NULL) { 487 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 488 goto bad; 489 } 490 491 /* NB: this could be optimized because of ieee80211_mbuf_adjust */ 492 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 493 llc = mtod(m, struct llc *); 494 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 495 llc->llc_control = LLC_UI; 496 llc->llc_snap.org_code[0] = 0; 497 llc->llc_snap.org_code[1] = 0; 498 llc->llc_snap.org_code[2] = 0; 499 llc->llc_snap.ether_type = eh.ether_type; 500 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 501 502 M_PREPEND(m, hdrsize, M_DONTWAIT); 503 if (m == NULL) { 504 ic->ic_stats.is_tx_nobuf++; 505 goto bad; 506 } 507 wh = mtod(m, struct ieee80211_frame *); 508 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 509 *(u_int16_t *)wh->i_dur = 0; 510 switch (ic->ic_opmode) { 511 case IEEE80211_M_STA: 512 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 513 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 514 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 515 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 516 break; 517 case IEEE80211_M_IBSS: 518 case IEEE80211_M_AHDEMO: 519 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 520 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 521 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 522 /* 523 * NB: always use the bssid from ic_bss as the 524 * neighbor's may be stale after an ibss merge 525 */ 526 IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_bss->ni_bssid); 527 break; 528 case IEEE80211_M_HOSTAP: 529 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 530 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 531 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 532 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 533 break; 534 case IEEE80211_M_MONITOR: 535 goto bad; 536 } 537 if (addqos) { 538 struct ieee80211_qosframe *qwh = 539 (struct ieee80211_qosframe *) wh; 540 int ac, tid; 541 542 ac = M_WME_GETAC(m); 543 /* map from access class/queue to 11e header priorty value */ 544 tid = WME_AC_TO_TID(ac); 545 qwh->i_qos[0] = tid & IEEE80211_QOS_TID; 546 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 547 qwh->i_qos[0] |= 1 << IEEE80211_QOS_ACKPOLICY_S; 548 qwh->i_qos[1] = 0; 549 qwh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 550 551 *(u_int16_t *)wh->i_seq = 552 htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT); 553 ni->ni_txseqs[tid]++; 554 } else { 555 *(u_int16_t *)wh->i_seq = 556 htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); 557 ni->ni_txseqs[0]++; 558 } 559 if (key != NULL) { 560 /* 561 * IEEE 802.1X: send EAPOL frames always in the clear. 562 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 563 */ 564 if (eh.ether_type != htons(ETHERTYPE_PAE) || 565 ((ic->ic_flags & IEEE80211_F_WPA) && 566 !KEY_UNDEFINED(*key))) { 567 wh->i_fc[1] |= IEEE80211_FC1_WEP; 568 /* XXX do fragmentation */ 569 if (!ieee80211_crypto_enmic(ic, key, m)) { 570 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 571 "[%s] enmic failed, discard frame\n", 572 ether_sprintf(eh.ether_dhost)); 573 ic->ic_stats.is_crypto_enmicfail++; 574 goto bad; 575 } 576 } 577 } 578 579 IEEE80211_NODE_STAT(ni, tx_data); 580 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 581 582 return m; 583 bad: 584 if (m != NULL) 585 m_freem(m); 586 return NULL; 587 } 588 589 /* 590 * Add a supported rates element id to a frame. 591 */ 592 static u_int8_t * 593 ieee80211_add_rates(u_int8_t *frm, const struct ieee80211_rateset *rs) 594 { 595 int nrates; 596 597 *frm++ = IEEE80211_ELEMID_RATES; 598 nrates = rs->rs_nrates; 599 if (nrates > IEEE80211_RATE_SIZE) 600 nrates = IEEE80211_RATE_SIZE; 601 *frm++ = nrates; 602 memcpy(frm, rs->rs_rates, nrates); 603 return frm + nrates; 604 } 605 606 /* 607 * Add an extended supported rates element id to a frame. 608 */ 609 static u_int8_t * 610 ieee80211_add_xrates(u_int8_t *frm, const struct ieee80211_rateset *rs) 611 { 612 /* 613 * Add an extended supported rates element if operating in 11g mode. 614 */ 615 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 616 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 617 *frm++ = IEEE80211_ELEMID_XRATES; 618 *frm++ = nrates; 619 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 620 frm += nrates; 621 } 622 return frm; 623 } 624 625 /* 626 * Add an ssid elemet to a frame. 627 */ 628 static u_int8_t * 629 ieee80211_add_ssid(u_int8_t *frm, const u_int8_t *ssid, u_int len) 630 { 631 *frm++ = IEEE80211_ELEMID_SSID; 632 *frm++ = len; 633 memcpy(frm, ssid, len); 634 return frm + len; 635 } 636 637 /* 638 * Add an erp element to a frame. 639 */ 640 static u_int8_t * 641 ieee80211_add_erp(u_int8_t *frm, struct ieee80211com *ic) 642 { 643 u_int8_t erp; 644 645 *frm++ = IEEE80211_ELEMID_ERP; 646 *frm++ = 1; 647 erp = 0; 648 if (ic->ic_nonerpsta != 0) 649 erp |= IEEE80211_ERP_NON_ERP_PRESENT; 650 if (ic->ic_flags & IEEE80211_F_USEPROT) 651 erp |= IEEE80211_ERP_USE_PROTECTION; 652 if (ic->ic_flags & IEEE80211_F_USEBARKER) 653 erp |= IEEE80211_ERP_LONG_PREAMBLE; 654 *frm++ = erp; 655 return frm; 656 } 657 658 static u_int8_t * 659 ieee80211_setup_wpa_ie(struct ieee80211com *ic, u_int8_t *ie) 660 { 661 #define WPA_OUI_BYTES 0x00, 0x50, 0xf2 662 #define ADDSHORT(frm, v) do { \ 663 frm[0] = (v) & 0xff; \ 664 frm[1] = (v) >> 8; \ 665 frm += 2; \ 666 } while (0) 667 #define ADDSELECTOR(frm, sel) do { \ 668 memcpy(frm, sel, 4); \ 669 frm += 4; \ 670 } while (0) 671 static const u_int8_t oui[4] = { WPA_OUI_BYTES, WPA_OUI_TYPE }; 672 static const u_int8_t cipher_suite[][4] = { 673 { WPA_OUI_BYTES, WPA_CSE_WEP40 }, /* NB: 40-bit */ 674 { WPA_OUI_BYTES, WPA_CSE_TKIP }, 675 { 0x00, 0x00, 0x00, 0x00 }, /* XXX WRAP */ 676 { WPA_OUI_BYTES, WPA_CSE_CCMP }, 677 { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */ 678 { WPA_OUI_BYTES, WPA_CSE_NULL }, 679 }; 680 static const u_int8_t wep104_suite[4] = 681 { WPA_OUI_BYTES, WPA_CSE_WEP104 }; 682 static const u_int8_t key_mgt_unspec[4] = 683 { WPA_OUI_BYTES, WPA_ASE_8021X_UNSPEC }; 684 static const u_int8_t key_mgt_psk[4] = 685 { WPA_OUI_BYTES, WPA_ASE_8021X_PSK }; 686 const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn; 687 u_int8_t *frm = ie; 688 u_int8_t *selcnt; 689 690 *frm++ = IEEE80211_ELEMID_VENDOR; 691 *frm++ = 0; /* length filled in below */ 692 memcpy(frm, oui, sizeof(oui)); /* WPA OUI */ 693 frm += sizeof(oui); 694 ADDSHORT(frm, WPA_VERSION); 695 696 /* XXX filter out CKIP */ 697 698 /* multicast cipher */ 699 if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP && 700 rsn->rsn_mcastkeylen >= 13) 701 ADDSELECTOR(frm, wep104_suite); 702 else 703 ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]); 704 705 /* unicast cipher list */ 706 selcnt = frm; 707 ADDSHORT(frm, 0); /* selector count */ 708 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) { 709 selcnt[0]++; 710 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]); 711 } 712 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) { 713 selcnt[0]++; 714 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]); 715 } 716 717 /* authenticator selector list */ 718 selcnt = frm; 719 ADDSHORT(frm, 0); /* selector count */ 720 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) { 721 selcnt[0]++; 722 ADDSELECTOR(frm, key_mgt_unspec); 723 } 724 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) { 725 selcnt[0]++; 726 ADDSELECTOR(frm, key_mgt_psk); 727 } 728 729 /* optional capabilities */ 730 if (rsn->rsn_caps != 0) 731 ADDSHORT(frm, rsn->rsn_caps); 732 733 /* calculate element length */ 734 ie[1] = frm - ie - 2; 735 KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa), 736 ("WPA IE too big, %u > %zu", 737 ie[1]+2, sizeof(struct ieee80211_ie_wpa))); 738 return frm; 739 #undef ADDSHORT 740 #undef ADDSELECTOR 741 #undef WPA_OUI_BYTES 742 } 743 744 static u_int8_t * 745 ieee80211_setup_rsn_ie(struct ieee80211com *ic, u_int8_t *ie) 746 { 747 #define RSN_OUI_BYTES 0x00, 0x0f, 0xac 748 #define ADDSHORT(frm, v) do { \ 749 frm[0] = (v) & 0xff; \ 750 frm[1] = (v) >> 8; \ 751 frm += 2; \ 752 } while (0) 753 #define ADDSELECTOR(frm, sel) do { \ 754 memcpy(frm, sel, 4); \ 755 frm += 4; \ 756 } while (0) 757 static const u_int8_t cipher_suite[][4] = { 758 { RSN_OUI_BYTES, RSN_CSE_WEP40 }, /* NB: 40-bit */ 759 { RSN_OUI_BYTES, RSN_CSE_TKIP }, 760 { RSN_OUI_BYTES, RSN_CSE_WRAP }, 761 { RSN_OUI_BYTES, RSN_CSE_CCMP }, 762 { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */ 763 { RSN_OUI_BYTES, RSN_CSE_NULL }, 764 }; 765 static const u_int8_t wep104_suite[4] = 766 { RSN_OUI_BYTES, RSN_CSE_WEP104 }; 767 static const u_int8_t key_mgt_unspec[4] = 768 { RSN_OUI_BYTES, RSN_ASE_8021X_UNSPEC }; 769 static const u_int8_t key_mgt_psk[4] = 770 { RSN_OUI_BYTES, RSN_ASE_8021X_PSK }; 771 const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn; 772 u_int8_t *frm = ie; 773 u_int8_t *selcnt; 774 775 *frm++ = IEEE80211_ELEMID_RSN; 776 *frm++ = 0; /* length filled in below */ 777 ADDSHORT(frm, RSN_VERSION); 778 779 /* XXX filter out CKIP */ 780 781 /* multicast cipher */ 782 if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP && 783 rsn->rsn_mcastkeylen >= 13) 784 ADDSELECTOR(frm, wep104_suite); 785 else 786 ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]); 787 788 /* unicast cipher list */ 789 selcnt = frm; 790 ADDSHORT(frm, 0); /* selector count */ 791 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) { 792 selcnt[0]++; 793 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]); 794 } 795 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) { 796 selcnt[0]++; 797 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]); 798 } 799 800 /* authenticator selector list */ 801 selcnt = frm; 802 ADDSHORT(frm, 0); /* selector count */ 803 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) { 804 selcnt[0]++; 805 ADDSELECTOR(frm, key_mgt_unspec); 806 } 807 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) { 808 selcnt[0]++; 809 ADDSELECTOR(frm, key_mgt_psk); 810 } 811 812 /* optional capabilities */ 813 if (rsn->rsn_caps != 0) 814 ADDSHORT(frm, rsn->rsn_caps); 815 /* XXX PMKID */ 816 817 /* calculate element length */ 818 ie[1] = frm - ie - 2; 819 KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa), 820 ("RSN IE too big, %u > %zu", 821 ie[1]+2, sizeof(struct ieee80211_ie_wpa))); 822 return frm; 823 #undef ADDSELECTOR 824 #undef ADDSHORT 825 #undef RSN_OUI_BYTES 826 } 827 828 /* 829 * Add a WPA/RSN element to a frame. 830 */ 831 static u_int8_t * 832 ieee80211_add_wpa(u_int8_t *frm, struct ieee80211com *ic) 833 { 834 835 KASSERT(ic->ic_flags & IEEE80211_F_WPA, ("no WPA/RSN!")); 836 if (ic->ic_flags & IEEE80211_F_WPA2) 837 frm = ieee80211_setup_rsn_ie(ic, frm); 838 if (ic->ic_flags & IEEE80211_F_WPA1) 839 frm = ieee80211_setup_wpa_ie(ic, frm); 840 return frm; 841 } 842 843 #define WME_OUI_BYTES 0x00, 0x50, 0xf2 844 /* 845 * Add a WME information element to a frame. 846 */ 847 static u_int8_t * 848 ieee80211_add_wme_info(u_int8_t *frm, struct ieee80211_wme_state *wme) 849 { 850 static const struct ieee80211_wme_info info = { 851 .wme_id = IEEE80211_ELEMID_VENDOR, 852 .wme_len = sizeof(struct ieee80211_wme_info) - 2, 853 .wme_oui = { WME_OUI_BYTES }, 854 .wme_type = WME_OUI_TYPE, 855 .wme_subtype = WME_INFO_OUI_SUBTYPE, 856 .wme_version = WME_VERSION, 857 .wme_info = 0, 858 }; 859 memcpy(frm, &info, sizeof(info)); 860 return frm + sizeof(info); 861 } 862 863 /* 864 * Add a WME parameters element to a frame. 865 */ 866 static u_int8_t * 867 ieee80211_add_wme_param(u_int8_t *frm, struct ieee80211_wme_state *wme) 868 { 869 #define SM(_v, _f) (((_v) << _f##_S) & _f) 870 #define ADDSHORT(frm, v) do { \ 871 frm[0] = (v) & 0xff; \ 872 frm[1] = (v) >> 8; \ 873 frm += 2; \ 874 } while (0) 875 /* NB: this works 'cuz a param has an info at the front */ 876 static const struct ieee80211_wme_info param = { 877 .wme_id = IEEE80211_ELEMID_VENDOR, 878 .wme_len = sizeof(struct ieee80211_wme_param) - 2, 879 .wme_oui = { WME_OUI_BYTES }, 880 .wme_type = WME_OUI_TYPE, 881 .wme_subtype = WME_PARAM_OUI_SUBTYPE, 882 .wme_version = WME_VERSION, 883 }; 884 int i; 885 886 memcpy(frm, ¶m, sizeof(param)); 887 frm += __offsetof(struct ieee80211_wme_info, wme_info); 888 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 889 *frm++ = 0; /* reserved field */ 890 for (i = 0; i < WME_NUM_AC; i++) { 891 const struct wmeParams *ac = 892 &wme->wme_bssChanParams.cap_wmeParams[i]; 893 *frm++ = SM(i, WME_PARAM_ACI) 894 | SM(ac->wmep_acm, WME_PARAM_ACM) 895 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 896 ; 897 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 898 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 899 ; 900 ADDSHORT(frm, ac->wmep_txopLimit); 901 } 902 return frm; 903 #undef SM 904 #undef ADDSHORT 905 } 906 #undef WME_OUI_BYTES 907 908 /* 909 * Send a management frame. The node is for the destination (or ic_bss 910 * when in station mode). Nodes other than ic_bss have their reference 911 * count bumped to reflect our use for an indeterminant time. 912 */ 913 int 914 ieee80211_send_mgmt(struct ieee80211com *ic, struct ieee80211_node *ni, 915 int type, int arg) 916 { 917 #define senderr(_x, _v) do { ic->ic_stats._v++; ret = _x; goto bad; } while (0) 918 struct mbuf *m; 919 u_int8_t *frm; 920 enum ieee80211_phymode mode; 921 u_int16_t capinfo; 922 int has_challenge, is_shared_key, ret, timer, status; 923 924 KASSERT(ni != NULL, ("null node")); 925 926 /* 927 * Hold a reference on the node so it doesn't go away until after 928 * the xmit is complete all the way in the driver. On error we 929 * will remove our reference. 930 */ 931 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 932 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 933 __func__, __LINE__, 934 ni, ether_sprintf(ni->ni_macaddr), 935 ieee80211_node_refcnt(ni)+1); 936 ieee80211_ref_node(ni); 937 938 timer = 0; 939 switch (type) { 940 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 941 /* 942 * prreq frame format 943 * [tlv] ssid 944 * [tlv] supported rates 945 * [tlv] extended supported rates 946 * [tlv] WME (optional) 947 * [tlv] user-specified ie's 948 */ 949 m = ieee80211_getmgtframe(&frm, 950 2 + IEEE80211_NWID_LEN 951 + 2 + IEEE80211_RATE_SIZE 952 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 953 + sizeof(struct ieee80211_wme_param) 954 + (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0) 955 ); 956 if (m == NULL) 957 senderr(ENOMEM, is_tx_nobuf); 958 959 frm = ieee80211_add_ssid(frm, ic->ic_des_essid, ic->ic_des_esslen); 960 mode = ieee80211_chan2mode(ic, ni->ni_chan); 961 frm = ieee80211_add_rates(frm, &ic->ic_sup_rates[mode]); 962 frm = ieee80211_add_xrates(frm, &ic->ic_sup_rates[mode]); 963 if (ic->ic_flags & IEEE80211_F_WME) 964 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 965 if (ic->ic_opt_ie != NULL) { 966 memcpy(frm, ic->ic_opt_ie, ic->ic_opt_ie_len); 967 frm += ic->ic_opt_ie_len; 968 } 969 m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 970 971 IEEE80211_NODE_STAT(ni, tx_probereq); 972 if (ic->ic_opmode == IEEE80211_M_STA) 973 timer = IEEE80211_TRANS_WAIT; 974 break; 975 976 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 977 /* 978 * probe response frame format 979 * [8] time stamp 980 * [2] beacon interval 981 * [2] cabability information 982 * [tlv] ssid 983 * [tlv] supported rates 984 * [tlv] parameter set (FH/DS) 985 * [tlv] parameter set (IBSS) 986 * [tlv] extended rate phy (ERP) 987 * [tlv] extended supported rates 988 * [tlv] WPA 989 */ 990 m = ieee80211_getmgtframe(&frm, 991 8 992 + sizeof(u_int16_t) 993 + sizeof(u_int16_t) 994 + 2 + IEEE80211_NWID_LEN 995 + 2 + IEEE80211_RATE_SIZE 996 + 7 /* max(7,3) */ 997 + 6 998 + 3 999 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1000 /* XXX !WPA1+WPA2 fits w/o a cluster */ 1001 + (ic->ic_flags & IEEE80211_F_WPA ? 1002 2*sizeof(struct ieee80211_ie_wpa) : 0) 1003 ); 1004 if (m == NULL) 1005 senderr(ENOMEM, is_tx_nobuf); 1006 1007 memset(frm, 0, 8); /* timestamp should be filled later */ 1008 frm += 8; 1009 *(u_int16_t *)frm = htole16(ic->ic_bss->ni_intval); 1010 frm += 2; 1011 if (ic->ic_opmode == IEEE80211_M_IBSS) 1012 capinfo = IEEE80211_CAPINFO_IBSS; 1013 else 1014 capinfo = IEEE80211_CAPINFO_ESS; 1015 if (ic->ic_flags & IEEE80211_F_PRIVACY) 1016 capinfo |= IEEE80211_CAPINFO_PRIVACY; 1017 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1018 IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) 1019 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1020 if (ic->ic_flags & IEEE80211_F_SHSLOT) 1021 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1022 *(u_int16_t *)frm = htole16(capinfo); 1023 frm += 2; 1024 1025 frm = ieee80211_add_ssid(frm, ic->ic_bss->ni_essid, 1026 ic->ic_bss->ni_esslen); 1027 frm = ieee80211_add_rates(frm, &ni->ni_rates); 1028 1029 if (ic->ic_phytype == IEEE80211_T_FH) { 1030 *frm++ = IEEE80211_ELEMID_FHPARMS; 1031 *frm++ = 5; 1032 *frm++ = ni->ni_fhdwell & 0x00ff; 1033 *frm++ = (ni->ni_fhdwell >> 8) & 0x00ff; 1034 *frm++ = IEEE80211_FH_CHANSET( 1035 ieee80211_chan2ieee(ic, ni->ni_chan)); 1036 *frm++ = IEEE80211_FH_CHANPAT( 1037 ieee80211_chan2ieee(ic, ni->ni_chan)); 1038 *frm++ = ni->ni_fhindex; 1039 } else { 1040 *frm++ = IEEE80211_ELEMID_DSPARMS; 1041 *frm++ = 1; 1042 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 1043 } 1044 1045 if (ic->ic_opmode == IEEE80211_M_IBSS) { 1046 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 1047 *frm++ = 2; 1048 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 1049 } 1050 if (ic->ic_flags & IEEE80211_F_WPA) 1051 frm = ieee80211_add_wpa(frm, ic); 1052 if (ic->ic_curmode == IEEE80211_MODE_11G) 1053 frm = ieee80211_add_erp(frm, ic); 1054 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1055 m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 1056 break; 1057 1058 case IEEE80211_FC0_SUBTYPE_AUTH: 1059 status = arg >> 16; 1060 arg &= 0xffff; 1061 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 1062 arg == IEEE80211_AUTH_SHARED_RESPONSE) && 1063 ni->ni_challenge != NULL); 1064 1065 /* 1066 * Deduce whether we're doing open authentication or 1067 * shared key authentication. We do the latter if 1068 * we're in the middle of a shared key authentication 1069 * handshake or if we're initiating an authentication 1070 * request and configured to use shared key. 1071 */ 1072 is_shared_key = has_challenge || 1073 arg >= IEEE80211_AUTH_SHARED_RESPONSE || 1074 (arg == IEEE80211_AUTH_SHARED_REQUEST && 1075 ic->ic_bss->ni_authmode == IEEE80211_AUTH_SHARED); 1076 1077 m = ieee80211_getmgtframe(&frm, 1078 3 * sizeof(u_int16_t) 1079 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 1080 sizeof(u_int16_t)+IEEE80211_CHALLENGE_LEN : 0) 1081 ); 1082 if (m == NULL) 1083 senderr(ENOMEM, is_tx_nobuf); 1084 1085 ((u_int16_t *)frm)[0] = 1086 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 1087 : htole16(IEEE80211_AUTH_ALG_OPEN); 1088 ((u_int16_t *)frm)[1] = htole16(arg); /* sequence number */ 1089 ((u_int16_t *)frm)[2] = htole16(status);/* status */ 1090 1091 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 1092 ((u_int16_t *)frm)[3] = 1093 htole16((IEEE80211_CHALLENGE_LEN << 8) | 1094 IEEE80211_ELEMID_CHALLENGE); 1095 memcpy(&((u_int16_t *)frm)[4], ni->ni_challenge, 1096 IEEE80211_CHALLENGE_LEN); 1097 m->m_pkthdr.len = m->m_len = 1098 4 * sizeof(u_int16_t) + IEEE80211_CHALLENGE_LEN; 1099 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 1100 IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, 1101 "[%s] request encrypt frame (%s)\n", 1102 ether_sprintf(ni->ni_macaddr), __func__); 1103 m->m_flags |= M_LINK0; /* WEP-encrypt, please */ 1104 } 1105 } else 1106 m->m_pkthdr.len = m->m_len = 3 * sizeof(u_int16_t); 1107 1108 /* XXX not right for shared key */ 1109 if (status == IEEE80211_STATUS_SUCCESS) 1110 IEEE80211_NODE_STAT(ni, tx_auth); 1111 else 1112 IEEE80211_NODE_STAT(ni, tx_auth_fail); 1113 1114 /* 1115 * When 802.1x is not in use mark the port 1116 * authorized at this point so traffic can flow. 1117 */ 1118 if (ic->ic_opmode == IEEE80211_M_HOSTAP && 1119 status == IEEE80211_STATUS_SUCCESS && 1120 ni->ni_authmode != IEEE80211_AUTH_8021X) 1121 ieee80211_node_authorize(ic, ni); 1122 if (ic->ic_opmode == IEEE80211_M_STA) 1123 timer = IEEE80211_TRANS_WAIT; 1124 break; 1125 1126 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1127 IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, 1128 "[%s] send station deauthenticate (reason %d)\n", 1129 ether_sprintf(ni->ni_macaddr), arg); 1130 m = ieee80211_getmgtframe(&frm, sizeof(u_int16_t)); 1131 if (m == NULL) 1132 senderr(ENOMEM, is_tx_nobuf); 1133 *(u_int16_t *)frm = htole16(arg); /* reason */ 1134 m->m_pkthdr.len = m->m_len = sizeof(u_int16_t); 1135 1136 IEEE80211_NODE_STAT(ni, tx_deauth); 1137 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 1138 1139 ieee80211_node_unauthorize(ic, ni); /* port closed */ 1140 break; 1141 1142 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1143 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1144 /* 1145 * asreq frame format 1146 * [2] capability information 1147 * [2] listen interval 1148 * [6*] current AP address (reassoc only) 1149 * [tlv] ssid 1150 * [tlv] supported rates 1151 * [tlv] extended supported rates 1152 * [tlv] WME 1153 * [tlv] user-specified ie's 1154 */ 1155 m = ieee80211_getmgtframe(&frm, 1156 sizeof(u_int16_t) 1157 + sizeof(u_int16_t) 1158 + IEEE80211_ADDR_LEN 1159 + 2 + IEEE80211_NWID_LEN 1160 + 2 + IEEE80211_RATE_SIZE 1161 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1162 + sizeof(struct ieee80211_wme_info) 1163 + (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0) 1164 ); 1165 if (m == NULL) 1166 senderr(ENOMEM, is_tx_nobuf); 1167 1168 capinfo = 0; 1169 if (ic->ic_opmode == IEEE80211_M_IBSS) 1170 capinfo |= IEEE80211_CAPINFO_IBSS; 1171 else /* IEEE80211_M_STA */ 1172 capinfo |= IEEE80211_CAPINFO_ESS; 1173 if (ic->ic_flags & IEEE80211_F_PRIVACY) 1174 capinfo |= IEEE80211_CAPINFO_PRIVACY; 1175 /* 1176 * NB: Some 11a AP's reject the request when 1177 * short premable is set. 1178 */ 1179 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1180 IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) 1181 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1182 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) && 1183 (ic->ic_caps & IEEE80211_C_SHSLOT)) 1184 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1185 *(u_int16_t *)frm = htole16(capinfo); 1186 frm += 2; 1187 1188 *(u_int16_t *)frm = htole16(ic->ic_lintval); 1189 frm += 2; 1190 1191 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1192 IEEE80211_ADDR_COPY(frm, ic->ic_bss->ni_bssid); 1193 frm += IEEE80211_ADDR_LEN; 1194 } 1195 1196 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 1197 frm = ieee80211_add_rates(frm, &ni->ni_rates); 1198 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1199 if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL) 1200 frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 1201 if (ic->ic_opt_ie != NULL) { 1202 memcpy(frm, ic->ic_opt_ie, ic->ic_opt_ie_len); 1203 frm += ic->ic_opt_ie_len; 1204 } 1205 m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 1206 1207 timer = IEEE80211_TRANS_WAIT; 1208 break; 1209 1210 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1211 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1212 /* 1213 * asreq frame format 1214 * [2] capability information 1215 * [2] status 1216 * [2] association ID 1217 * [tlv] supported rates 1218 * [tlv] extended supported rates 1219 * [tlv] WME (if enabled and STA enabled) 1220 */ 1221 m = ieee80211_getmgtframe(&frm, 1222 sizeof(u_int16_t) 1223 + sizeof(u_int16_t) 1224 + sizeof(u_int16_t) 1225 + 2 + IEEE80211_RATE_SIZE 1226 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1227 + sizeof(struct ieee80211_wme_param) 1228 ); 1229 if (m == NULL) 1230 senderr(ENOMEM, is_tx_nobuf); 1231 1232 capinfo = IEEE80211_CAPINFO_ESS; 1233 if (ic->ic_flags & IEEE80211_F_PRIVACY) 1234 capinfo |= IEEE80211_CAPINFO_PRIVACY; 1235 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1236 IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) 1237 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1238 if (ic->ic_flags & IEEE80211_F_SHSLOT) 1239 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1240 *(u_int16_t *)frm = htole16(capinfo); 1241 frm += 2; 1242 1243 *(u_int16_t *)frm = htole16(arg); /* status */ 1244 frm += 2; 1245 1246 if (arg == IEEE80211_STATUS_SUCCESS) { 1247 *(u_int16_t *)frm = htole16(ni->ni_associd); 1248 IEEE80211_NODE_STAT(ni, tx_assoc); 1249 } else 1250 IEEE80211_NODE_STAT(ni, tx_assoc_fail); 1251 frm += 2; 1252 1253 frm = ieee80211_add_rates(frm, &ni->ni_rates); 1254 frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1255 if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL) 1256 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 1257 m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 1258 break; 1259 1260 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1261 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1262 "[%s] send station disassociate (reason %d)\n", 1263 ether_sprintf(ni->ni_macaddr), arg); 1264 m = ieee80211_getmgtframe(&frm, sizeof(u_int16_t)); 1265 if (m == NULL) 1266 senderr(ENOMEM, is_tx_nobuf); 1267 *(u_int16_t *)frm = htole16(arg); /* reason */ 1268 m->m_pkthdr.len = m->m_len = sizeof(u_int16_t); 1269 1270 IEEE80211_NODE_STAT(ni, tx_disassoc); 1271 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 1272 break; 1273 1274 default: 1275 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, 1276 "[%s] invalid mgmt frame type %u\n", 1277 ether_sprintf(ni->ni_macaddr), type); 1278 senderr(EINVAL, is_tx_unknownmgt); 1279 /* NOTREACHED */ 1280 } 1281 1282 ret = ieee80211_mgmt_output(ic, ni, m, type); 1283 if (ret == 0) { 1284 if (timer) 1285 ic->ic_mgt_timer = timer; 1286 } else { 1287 bad: 1288 ieee80211_free_node(ni); 1289 } 1290 return ret; 1291 #undef senderr 1292 } 1293 1294 /* 1295 * Allocate a beacon frame and fillin the appropriate bits. 1296 */ 1297 struct mbuf * 1298 ieee80211_beacon_alloc(struct ieee80211com *ic, struct ieee80211_node *ni, 1299 struct ieee80211_beacon_offsets *bo) 1300 { 1301 struct ifnet *ifp = ic->ic_ifp; 1302 struct ieee80211_frame *wh; 1303 struct mbuf *m; 1304 int pktlen; 1305 u_int8_t *frm, *efrm; 1306 u_int16_t capinfo; 1307 struct ieee80211_rateset *rs; 1308 1309 /* 1310 * beacon frame format 1311 * [8] time stamp 1312 * [2] beacon interval 1313 * [2] cabability information 1314 * [tlv] ssid 1315 * [tlv] supported rates 1316 * [3] parameter set (DS) 1317 * [tlv] parameter set (IBSS/TIM) 1318 * [tlv] extended rate phy (ERP) 1319 * [tlv] extended supported rates 1320 * [tlv] WME parameters 1321 * [tlv] WPA/RSN parameters 1322 * XXX Vendor-specific OIDs (e.g. Atheros) 1323 * NB: we allocate the max space required for the TIM bitmap. 1324 */ 1325 rs = &ni->ni_rates; 1326 pktlen = 8 /* time stamp */ 1327 + sizeof(u_int16_t) /* beacon interval */ 1328 + sizeof(u_int16_t) /* capabilities */ 1329 + 2 + ni->ni_esslen /* ssid */ 1330 + 2 + IEEE80211_RATE_SIZE /* supported rates */ 1331 + 2 + 1 /* DS parameters */ 1332 + 2 + 4 + ic->ic_tim_len /* DTIM/IBSSPARMS */ 1333 + 2 + 1 /* ERP */ 1334 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1335 + (ic->ic_caps & IEEE80211_C_WME ? /* WME */ 1336 sizeof(struct ieee80211_wme_param) : 0) 1337 + (ic->ic_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 1338 2*sizeof(struct ieee80211_ie_wpa) : 0) 1339 ; 1340 m = ieee80211_getmgtframe(&frm, pktlen); 1341 if (m == NULL) { 1342 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, 1343 "%s: cannot get buf; size %u\n", __func__, pktlen); 1344 ic->ic_stats.is_tx_nobuf++; 1345 return NULL; 1346 } 1347 1348 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 1349 frm += 8; 1350 *(u_int16_t *)frm = htole16(ni->ni_intval); 1351 frm += 2; 1352 if (ic->ic_opmode == IEEE80211_M_IBSS) 1353 capinfo = IEEE80211_CAPINFO_IBSS; 1354 else 1355 capinfo = IEEE80211_CAPINFO_ESS; 1356 if (ic->ic_flags & IEEE80211_F_PRIVACY) 1357 capinfo |= IEEE80211_CAPINFO_PRIVACY; 1358 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1359 IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) 1360 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1361 if (ic->ic_flags & IEEE80211_F_SHSLOT) 1362 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1363 bo->bo_caps = (u_int16_t *)frm; 1364 *(u_int16_t *)frm = htole16(capinfo); 1365 frm += 2; 1366 *frm++ = IEEE80211_ELEMID_SSID; 1367 if ((ic->ic_flags & IEEE80211_F_HIDESSID) == 0) { 1368 *frm++ = ni->ni_esslen; 1369 memcpy(frm, ni->ni_essid, ni->ni_esslen); 1370 frm += ni->ni_esslen; 1371 } else 1372 *frm++ = 0; 1373 frm = ieee80211_add_rates(frm, rs); 1374 if (ic->ic_curmode != IEEE80211_MODE_FH) { 1375 *frm++ = IEEE80211_ELEMID_DSPARMS; 1376 *frm++ = 1; 1377 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 1378 } 1379 bo->bo_tim = frm; 1380 if (ic->ic_opmode == IEEE80211_M_IBSS) { 1381 *frm++ = IEEE80211_ELEMID_IBSSPARMS; 1382 *frm++ = 2; 1383 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 1384 bo->bo_tim_len = 0; 1385 } else { 1386 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 1387 1388 tie->tim_ie = IEEE80211_ELEMID_TIM; 1389 tie->tim_len = 4; /* length */ 1390 tie->tim_count = 0; /* DTIM count */ 1391 tie->tim_period = ic->ic_dtim_period; /* DTIM period */ 1392 tie->tim_bitctl = 0; /* bitmap control */ 1393 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 1394 frm += sizeof(struct ieee80211_tim_ie); 1395 bo->bo_tim_len = 1; 1396 } 1397 bo->bo_trailer = frm; 1398 if (ic->ic_flags & IEEE80211_F_WME) { 1399 bo->bo_wme = frm; 1400 frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 1401 ic->ic_flags &= ~IEEE80211_F_WMEUPDATE; 1402 } 1403 if (ic->ic_flags & IEEE80211_F_WPA) 1404 frm = ieee80211_add_wpa(frm, ic); 1405 if (ic->ic_curmode == IEEE80211_MODE_11G) 1406 frm = ieee80211_add_erp(frm, ic); 1407 efrm = ieee80211_add_xrates(frm, rs); 1408 bo->bo_trailer_len = efrm - bo->bo_trailer; 1409 m->m_pkthdr.len = m->m_len = efrm - mtod(m, u_int8_t *); 1410 1411 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 1412 KASSERT(m != NULL, ("no space for 802.11 header?")); 1413 wh = mtod(m, struct ieee80211_frame *); 1414 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 1415 IEEE80211_FC0_SUBTYPE_BEACON; 1416 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1417 *(u_int16_t *)wh->i_dur = 0; 1418 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 1419 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 1420 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 1421 *(u_int16_t *)wh->i_seq = 0; 1422 1423 return m; 1424 } 1425 1426 /* 1427 * Update the dynamic parts of a beacon frame based on the current state. 1428 */ 1429 int 1430 ieee80211_beacon_update(struct ieee80211com *ic, struct ieee80211_node *ni, 1431 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) 1432 { 1433 int len_changed = 0; 1434 u_int16_t capinfo; 1435 1436 IEEE80211_BEACON_LOCK(ic); 1437 /* XXX faster to recalculate entirely or just changes? */ 1438 if (ic->ic_opmode == IEEE80211_M_IBSS) 1439 capinfo = IEEE80211_CAPINFO_IBSS; 1440 else 1441 capinfo = IEEE80211_CAPINFO_ESS; 1442 if (ic->ic_flags & IEEE80211_F_PRIVACY) 1443 capinfo |= IEEE80211_CAPINFO_PRIVACY; 1444 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1445 IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) 1446 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1447 if (ic->ic_flags & IEEE80211_F_SHSLOT) 1448 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1449 *bo->bo_caps = htole16(capinfo); 1450 1451 if (ic->ic_flags & IEEE80211_F_WME) { 1452 struct ieee80211_wme_state *wme = &ic->ic_wme; 1453 1454 /* 1455 * Check for agressive mode change. When there is 1456 * significant high priority traffic in the BSS 1457 * throttle back BE traffic by using conservative 1458 * parameters. Otherwise BE uses agressive params 1459 * to optimize performance of legacy/non-QoS traffic. 1460 */ 1461 if (wme->wme_flags & WME_F_AGGRMODE) { 1462 if (wme->wme_hipri_traffic > 1463 wme->wme_hipri_switch_thresh) { 1464 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, 1465 "%s: traffic %u, disable aggressive mode\n", 1466 __func__, wme->wme_hipri_traffic); 1467 wme->wme_flags &= ~WME_F_AGGRMODE; 1468 ieee80211_wme_updateparams_locked(ic); 1469 wme->wme_hipri_traffic = 1470 wme->wme_hipri_switch_hysteresis; 1471 } else 1472 wme->wme_hipri_traffic = 0; 1473 } else { 1474 if (wme->wme_hipri_traffic <= 1475 wme->wme_hipri_switch_thresh) { 1476 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, 1477 "%s: traffic %u, enable aggressive mode\n", 1478 __func__, wme->wme_hipri_traffic); 1479 wme->wme_flags |= WME_F_AGGRMODE; 1480 ieee80211_wme_updateparams_locked(ic); 1481 wme->wme_hipri_traffic = 0; 1482 } else 1483 wme->wme_hipri_traffic = 1484 wme->wme_hipri_switch_hysteresis; 1485 } 1486 if (ic->ic_flags & IEEE80211_F_WMEUPDATE) { 1487 (void) ieee80211_add_wme_param(bo->bo_wme, wme); 1488 ic->ic_flags &= ~IEEE80211_F_WMEUPDATE; 1489 } 1490 } 1491 1492 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* NB: no IBSS support*/ 1493 struct ieee80211_tim_ie *tie = 1494 (struct ieee80211_tim_ie *) bo->bo_tim; 1495 if (ic->ic_flags & IEEE80211_F_TIMUPDATE) { 1496 u_int timlen, timoff, i; 1497 /* 1498 * ATIM/DTIM needs updating. If it fits in the 1499 * current space allocated then just copy in the 1500 * new bits. Otherwise we need to move any trailing 1501 * data to make room. Note that we know there is 1502 * contiguous space because ieee80211_beacon_allocate 1503 * insures there is space in the mbuf to write a 1504 * maximal-size virtual bitmap (based on ic_max_aid). 1505 */ 1506 /* 1507 * Calculate the bitmap size and offset, copy any 1508 * trailer out of the way, and then copy in the 1509 * new bitmap and update the information element. 1510 * Note that the tim bitmap must contain at least 1511 * one byte and any offset must be even. 1512 */ 1513 if (ic->ic_ps_pending != 0) { 1514 timoff = 128; /* impossibly large */ 1515 for (i = 0; i < ic->ic_tim_len; i++) 1516 if (ic->ic_tim_bitmap[i]) { 1517 timoff = i &~ 1; 1518 break; 1519 } 1520 KASSERT(timoff != 128, ("tim bitmap empty!")); 1521 for (i = ic->ic_tim_len-1; i >= timoff; i--) 1522 if (ic->ic_tim_bitmap[i]) 1523 break; 1524 timlen = 1 + (i - timoff); 1525 } else { 1526 timoff = 0; 1527 timlen = 1; 1528 } 1529 if (timlen != bo->bo_tim_len) { 1530 /* copy up/down trailer */ 1531 ovbcopy(bo->bo_trailer, tie->tim_bitmap+timlen, 1532 bo->bo_trailer_len); 1533 bo->bo_trailer = tie->tim_bitmap+timlen; 1534 bo->bo_wme = bo->bo_trailer; 1535 bo->bo_tim_len = timlen; 1536 1537 /* update information element */ 1538 tie->tim_len = 3 + timlen; 1539 tie->tim_bitctl = timoff; 1540 len_changed = 1; 1541 } 1542 memcpy(tie->tim_bitmap, ic->ic_tim_bitmap + timoff, 1543 bo->bo_tim_len); 1544 1545 ic->ic_flags &= ~IEEE80211_F_TIMUPDATE; 1546 1547 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 1548 "%s: TIM updated, pending %u, off %u, len %u\n", 1549 __func__, ic->ic_ps_pending, timoff, timlen); 1550 } 1551 /* count down DTIM period */ 1552 if (tie->tim_count == 0) 1553 tie->tim_count = tie->tim_period - 1; 1554 else 1555 tie->tim_count--; 1556 /* update state for buffered multicast frames on DTIM */ 1557 if (mcast && (tie->tim_count == 1 || tie->tim_period == 1)) 1558 tie->tim_bitctl |= 1; 1559 else 1560 tie->tim_bitctl &= ~1; 1561 } 1562 IEEE80211_BEACON_UNLOCK(ic); 1563 1564 return len_changed; 1565 } 1566 1567 /* 1568 * Save an outbound packet for a node in power-save sleep state. 1569 * The new packet is placed on the node's saved queue, and the TIM 1570 * is changed, if necessary. 1571 */ 1572 void 1573 ieee80211_pwrsave(struct ieee80211com *ic, struct ieee80211_node *ni, 1574 struct mbuf *m) 1575 { 1576 int qlen, age; 1577 1578 IEEE80211_NODE_SAVEQ_LOCK(ni); 1579 if (_IF_QFULL(&ni->ni_savedq)) { 1580 _IF_DROP(&ni->ni_savedq); 1581 IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1582 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, 1583 "[%s] pwr save q overflow, drops %d (size %d)\n", 1584 ether_sprintf(ni->ni_macaddr), 1585 ni->ni_savedq.ifq_drops, IEEE80211_PS_MAX_QUEUE); 1586 #ifdef IEEE80211_DEBUG 1587 if (ieee80211_msg_dumppkts(ic)) 1588 ieee80211_dump_pkt(mtod(m, caddr_t), m->m_len, -1, -1); 1589 #endif 1590 m_freem(m); 1591 return; 1592 } 1593 /* 1594 * Tag the frame with it's expiry time and insert 1595 * it in the queue. The aging interval is 4 times 1596 * the listen interval specified by the station. 1597 * Frames that sit around too long are reclaimed 1598 * using this information. 1599 */ 1600 /* XXX handle overflow? */ 1601 age = ((ni->ni_intval * ic->ic_lintval) << 2) / 1024; /* TU -> secs */ 1602 _IEEE80211_NODE_SAVEQ_ENQUEUE(ni, m, qlen, age); 1603 IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1604 1605 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 1606 "[%s] save frame, %u now queued\n", 1607 ether_sprintf(ni->ni_macaddr), qlen); 1608 1609 if (qlen == 1) 1610 ic->ic_set_tim(ic, ni, 1); 1611 } 1612