| 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 | * $FreeBSD: src/sys/net80211/ieee80211_output.c,v 1.26.2.8 2006/09/02 15:06:04 sam Exp $ |
| 33 | * $DragonFly: src/sys/netproto/802_11/wlan/ieee80211_output.c,v 1.15 2007/03/05 14:17:36 sephe Exp $ |
| 34 | */ |
| 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_arp.h> |
| 50 | #include <net/if_llc.h> |
| 51 | #include <net/if_media.h> |
| 52 | #include <net/vlan/if_vlan_var.h> |
| 53 | |
| 54 | #include <netproto/802_11/ieee80211_var.h> |
| 55 | |
| 56 | #ifdef INET |
| 57 | #include <netinet/in.h> |
| 58 | #include <netinet/if_ether.h> |
| 59 | #include <netinet/in_systm.h> |
| 60 | #include <netinet/ip.h> |
| 61 | #endif |
| 62 | |
| 63 | #ifdef IEEE80211_DEBUG |
| 64 | /* |
| 65 | * Decide if an outbound management frame should be |
| 66 | * printed when debugging is enabled. This filters some |
| 67 | * of the less interesting frames that come frequently |
| 68 | * (e.g. beacons). |
| 69 | */ |
| 70 | static __inline int |
| 71 | doprint(struct ieee80211com *ic, int subtype) |
| 72 | { |
| 73 | switch (subtype) { |
| 74 | case IEEE80211_FC0_SUBTYPE_PROBE_RESP: |
| 75 | return (ic->ic_opmode == IEEE80211_M_IBSS); |
| 76 | } |
| 77 | return 1; |
| 78 | } |
| 79 | #endif |
| 80 | |
| 81 | /* |
| 82 | * Set the direction field and address fields of an outgoing |
| 83 | * non-QoS frame. Note this should be called early on in |
| 84 | * constructing a frame as it sets i_fc[1]; other bits can |
| 85 | * then be or'd in. |
| 86 | */ |
| 87 | static void |
| 88 | ieee80211_send_setup(struct ieee80211com *ic, |
| 89 | struct ieee80211_node *ni, |
| 90 | struct ieee80211_frame *wh, |
| 91 | int type, |
| 92 | const uint8_t sa[IEEE80211_ADDR_LEN], |
| 93 | const uint8_t da[IEEE80211_ADDR_LEN], |
| 94 | const uint8_t bssid[IEEE80211_ADDR_LEN]) |
| 95 | { |
| 96 | #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) |
| 97 | |
| 98 | wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; |
| 99 | if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { |
| 100 | switch (ic->ic_opmode) { |
| 101 | case IEEE80211_M_STA: |
| 102 | wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; |
| 103 | IEEE80211_ADDR_COPY(wh->i_addr1, bssid); |
| 104 | IEEE80211_ADDR_COPY(wh->i_addr2, sa); |
| 105 | IEEE80211_ADDR_COPY(wh->i_addr3, da); |
| 106 | break; |
| 107 | case IEEE80211_M_IBSS: |
| 108 | case IEEE80211_M_AHDEMO: |
| 109 | wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; |
| 110 | IEEE80211_ADDR_COPY(wh->i_addr1, da); |
| 111 | IEEE80211_ADDR_COPY(wh->i_addr2, sa); |
| 112 | IEEE80211_ADDR_COPY(wh->i_addr3, bssid); |
| 113 | break; |
| 114 | case IEEE80211_M_HOSTAP: |
| 115 | wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; |
| 116 | IEEE80211_ADDR_COPY(wh->i_addr1, da); |
| 117 | IEEE80211_ADDR_COPY(wh->i_addr2, bssid); |
| 118 | IEEE80211_ADDR_COPY(wh->i_addr3, sa); |
| 119 | break; |
| 120 | case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ |
| 121 | break; |
| 122 | } |
| 123 | } else { |
| 124 | wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; |
| 125 | IEEE80211_ADDR_COPY(wh->i_addr1, da); |
| 126 | IEEE80211_ADDR_COPY(wh->i_addr2, sa); |
| 127 | IEEE80211_ADDR_COPY(wh->i_addr3, bssid); |
| 128 | } |
| 129 | *(uint16_t *)&wh->i_dur[0] = 0; |
| 130 | /* NB: use non-QoS tid */ |
| 131 | *(uint16_t *)&wh->i_seq[0] = |
| 132 | htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); |
| 133 | ni->ni_txseqs[0]++; |
| 134 | #undef WH4 |
| 135 | } |
| 136 | |
| 137 | /* |
| 138 | * Send a management frame to the specified node. The node pointer |
| 139 | * must have a reference as the pointer will be passed to the driver |
| 140 | * and potentially held for a long time. If the frame is successfully |
| 141 | * dispatched to the driver, then it is responsible for freeing the |
| 142 | * reference (and potentially free'ing up any associated storage). |
| 143 | */ |
| 144 | static int |
| 145 | ieee80211_mgmt_output(struct ieee80211com *ic, struct ieee80211_node *ni, |
| 146 | struct mbuf *m, int type, int timer, int encrypt) |
| 147 | { |
| 148 | struct ifnet *ifp = ic->ic_ifp; |
| 149 | struct ieee80211_frame *wh; |
| 150 | |
| 151 | KASSERT(ni != NULL, ("null node")); |
| 152 | |
| 153 | /* |
| 154 | * Yech, hack alert! We want to pass the node down to the |
| 155 | * driver's start routine. If we don't do so then the start |
| 156 | * routine must immediately look it up again and that can |
| 157 | * cause a lock order reversal if, for example, this frame |
| 158 | * is being sent because the station is being timedout and |
| 159 | * the frame being sent is a DEAUTH message. We could stick |
| 160 | * this in an m_tag and tack that on to the mbuf. However |
| 161 | * that's rather expensive to do for every frame so instead |
| 162 | * we stuff it in the rcvif field since outbound frames do |
| 163 | * not (presently) use this. |
| 164 | */ |
| 165 | M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT); |
| 166 | if (m == NULL) |
| 167 | return ENOMEM; |
| 168 | KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null")); |
| 169 | m->m_pkthdr.rcvif = (void *)ni; |
| 170 | |
| 171 | wh = mtod(m, struct ieee80211_frame *); |
| 172 | ieee80211_send_setup(ic, ni, wh, |
| 173 | IEEE80211_FC0_TYPE_MGT | type, |
| 174 | ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid); |
| 175 | if (encrypt) { |
| 176 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, |
| 177 | "[%6D] encrypting frame (%s)\n", |
| 178 | wh->i_addr1, ":", __func__); |
| 179 | wh->i_fc[1] |= IEEE80211_FC1_WEP; |
| 180 | } |
| 181 | #ifdef IEEE80211_DEBUG |
| 182 | /* avoid printing too many frames */ |
| 183 | if ((ieee80211_msg_debug(ic) && doprint(ic, type)) || |
| 184 | ieee80211_msg_dumppkts(ic)) { |
| 185 | kprintf("[%6D] send %s on channel %u\n", |
| 186 | wh->i_addr1, ":", |
| 187 | ieee80211_mgt_subtype_name[ |
| 188 | (type & IEEE80211_FC0_SUBTYPE_MASK) >> |
| 189 | IEEE80211_FC0_SUBTYPE_SHIFT], |
| 190 | ieee80211_chan2ieee(ic, ic->ic_curchan)); |
| 191 | } |
| 192 | #endif |
| 193 | IEEE80211_NODE_STAT(ni, tx_mgmt); |
| 194 | IF_ENQUEUE(&ic->ic_mgtq, m); |
| 195 | if (timer) { |
| 196 | /* |
| 197 | * Set the mgt frame timeout. |
| 198 | */ |
| 199 | ic->ic_mgt_timer = timer; |
| 200 | ifp->if_timer = 1; |
| 201 | } |
| 202 | ifp->if_start(ifp); |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | /* |
| 207 | * Send a null data frame to the specified node. |
| 208 | * |
| 209 | * NB: the caller is assumed to have setup a node reference |
| 210 | * for use; this is necessary to deal with a race condition |
| 211 | * when probing for inactive stations. |
| 212 | */ |
| 213 | int |
| 214 | ieee80211_send_nulldata(struct ieee80211_node *ni) |
| 215 | { |
| 216 | struct ieee80211com *ic = ni->ni_ic; |
| 217 | struct ifnet *ifp = ic->ic_ifp; |
| 218 | struct mbuf *m; |
| 219 | struct ieee80211_frame *wh; |
| 220 | |
| 221 | MGETHDR(m, MB_DONTWAIT, MT_HEADER); |
| 222 | if (m == NULL) { |
| 223 | /* XXX debug msg */ |
| 224 | ic->ic_stats.is_tx_nobuf++; |
| 225 | ieee80211_unref_node(&ni); |
| 226 | return ENOMEM; |
| 227 | } |
| 228 | m->m_pkthdr.rcvif = (void *) ni; |
| 229 | |
| 230 | wh = mtod(m, struct ieee80211_frame *); |
| 231 | ieee80211_send_setup(ic, ni, wh, |
| 232 | IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, |
| 233 | ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid); |
| 234 | /* NB: power management bit is never sent by an AP */ |
| 235 | if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && |
| 236 | ic->ic_opmode != IEEE80211_M_HOSTAP) |
| 237 | wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; |
| 238 | m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame); |
| 239 | |
| 240 | IEEE80211_NODE_STAT(ni, tx_data); |
| 241 | |
| 242 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, |
| 243 | "[%s] send null data frame on channel %u, pwr mgt %s\n", |
| 244 | ni->ni_macaddr, ":", |
| 245 | ieee80211_chan2ieee(ic, ic->ic_curchan), |
| 246 | wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); |
| 247 | |
| 248 | IF_ENQUEUE(&ic->ic_mgtq, m); /* cheat */ |
| 249 | ifp->if_start(ifp); |
| 250 | return 0; |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * Assign priority to a frame based on any vlan tag assigned |
| 255 | * to the station and/or any Diffserv setting in an IP header. |
| 256 | * Finally, if an ACM policy is setup (in station mode) it's |
| 257 | * applied. |
| 258 | */ |
| 259 | int |
| 260 | ieee80211_classify(struct ieee80211com *ic, struct mbuf *m, struct ieee80211_node *ni) |
| 261 | { |
| 262 | int v_wme_ac = 0, d_wme_ac, ac; |
| 263 | #ifdef INET |
| 264 | struct ether_header *eh; |
| 265 | #endif |
| 266 | |
| 267 | if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { |
| 268 | ac = WME_AC_BE; |
| 269 | goto done; |
| 270 | } |
| 271 | |
| 272 | #ifdef FREEBSD_VLAN |
| 273 | /* |
| 274 | * If node has a vlan tag then all traffic |
| 275 | * to it must have a matching tag. |
| 276 | */ |
| 277 | v_wme_ac = 0; |
| 278 | if (ni->ni_vlan != 0) { |
| 279 | struct m_tag *mtag = VLAN_OUTPUT_TAG(ic->ic_ifp, m); |
| 280 | if (mtag == NULL) { |
| 281 | IEEE80211_NODE_STAT(ni, tx_novlantag); |
| 282 | return 1; |
| 283 | } |
| 284 | if (EVL_VLANOFTAG(VLAN_TAG_VALUE(mtag)) != |
| 285 | EVL_VLANOFTAG(ni->ni_vlan)) { |
| 286 | IEEE80211_NODE_STAT(ni, tx_vlanmismatch); |
| 287 | return 1; |
| 288 | } |
| 289 | /* map vlan priority to AC */ |
| 290 | switch (EVL_PRIOFTAG(ni->ni_vlan)) { |
| 291 | case 1: |
| 292 | case 2: |
| 293 | v_wme_ac = WME_AC_BK; |
| 294 | break; |
| 295 | case 0: |
| 296 | case 3: |
| 297 | v_wme_ac = WME_AC_BE; |
| 298 | break; |
| 299 | case 4: |
| 300 | case 5: |
| 301 | v_wme_ac = WME_AC_VI; |
| 302 | break; |
| 303 | case 6: |
| 304 | case 7: |
| 305 | v_wme_ac = WME_AC_VO; |
| 306 | break; |
| 307 | } |
| 308 | } |
| 309 | #endif /* FREEBSD_VLAN */ |
| 310 | |
| 311 | #ifdef INET |
| 312 | eh = mtod(m, struct ether_header *); |
| 313 | if (eh->ether_type == htons(ETHERTYPE_IP)) { |
| 314 | const struct ip *ip = (struct ip *) |
| 315 | (mtod(m, uint8_t *) + sizeof (*eh)); |
| 316 | /* |
| 317 | * IP frame, map the TOS field. |
| 318 | */ |
| 319 | switch (ip->ip_tos) { |
| 320 | case 0x08: |
| 321 | case 0x20: |
| 322 | d_wme_ac = WME_AC_BK; /* background */ |
| 323 | break; |
| 324 | case 0x28: |
| 325 | case 0xa0: |
| 326 | d_wme_ac = WME_AC_VI; /* video */ |
| 327 | break; |
| 328 | case 0x30: /* voice */ |
| 329 | case 0xe0: |
| 330 | case 0x88: /* XXX UPSD */ |
| 331 | case 0xb8: |
| 332 | d_wme_ac = WME_AC_VO; |
| 333 | break; |
| 334 | default: |
| 335 | d_wme_ac = WME_AC_BE; |
| 336 | break; |
| 337 | } |
| 338 | } else { |
| 339 | #endif /* INET */ |
| 340 | d_wme_ac = WME_AC_BE; |
| 341 | #ifdef INET |
| 342 | } |
| 343 | #endif |
| 344 | /* |
| 345 | * Use highest priority AC. |
| 346 | */ |
| 347 | if (v_wme_ac > d_wme_ac) |
| 348 | ac = v_wme_ac; |
| 349 | else |
| 350 | ac = d_wme_ac; |
| 351 | |
| 352 | /* |
| 353 | * Apply ACM policy. |
| 354 | */ |
| 355 | if (ic->ic_opmode == IEEE80211_M_STA) { |
| 356 | static const int acmap[4] = { |
| 357 | WME_AC_BK, /* WME_AC_BE */ |
| 358 | WME_AC_BK, /* WME_AC_BK */ |
| 359 | WME_AC_BE, /* WME_AC_VI */ |
| 360 | WME_AC_VI, /* WME_AC_VO */ |
| 361 | }; |
| 362 | while (ac != WME_AC_BK && |
| 363 | ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) |
| 364 | ac = acmap[ac]; |
| 365 | } |
| 366 | done: |
| 367 | M_WME_SETAC(m, ac); |
| 368 | return 0; |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * Insure there is sufficient contiguous space to encapsulate the |
| 373 | * 802.11 data frame. If room isn't already there, arrange for it. |
| 374 | * Drivers and cipher modules assume we have done the necessary work |
| 375 | * and fail rudely if they don't find the space they need. |
| 376 | */ |
| 377 | static struct mbuf * |
| 378 | ieee80211_mbuf_adjust(struct ieee80211com *ic, int hdrsize, |
| 379 | struct ieee80211_key *key, struct mbuf *m) |
| 380 | { |
| 381 | #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) |
| 382 | int needed_space = hdrsize; |
| 383 | |
| 384 | if (key != NULL) { |
| 385 | /* XXX belongs in crypto code? */ |
| 386 | needed_space += key->wk_cipher->ic_header; |
| 387 | /* XXX frags */ |
| 388 | /* |
| 389 | * When crypto is being done in the host we must insure |
| 390 | * the data are writable for the cipher routines; clone |
| 391 | * a writable mbuf chain. |
| 392 | * XXX handle SWMIC specially |
| 393 | */ |
| 394 | if (key->wk_flags & (IEEE80211_KEY_SWCRYPT|IEEE80211_KEY_SWMIC)) { |
| 395 | m = ieee80211_mbuf_clone(m, MB_DONTWAIT); |
| 396 | if (m == NULL) { |
| 397 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, |
| 398 | "%s: cannot get writable mbuf\n", __func__); |
| 399 | ic->ic_stats.is_tx_nobuf++; /* XXX new stat */ |
| 400 | return NULL; |
| 401 | } |
| 402 | } |
| 403 | } |
| 404 | /* |
| 405 | * We know we are called just before stripping an Ethernet |
| 406 | * header and prepending an LLC header. This means we know |
| 407 | * there will be |
| 408 | * sizeof(struct ether_header) - sizeof(struct llc) |
| 409 | * bytes recovered to which we need additional space for the |
| 410 | * 802.11 header and any crypto header. |
| 411 | */ |
| 412 | /* XXX check trailing space and copy instead? */ |
| 413 | if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { |
| 414 | struct mbuf *n = m_gethdr(MB_DONTWAIT, m->m_type); |
| 415 | if (n == NULL) { |
| 416 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, |
| 417 | "%s: cannot expand storage\n", __func__); |
| 418 | ic->ic_stats.is_tx_nobuf++; |
| 419 | m_freem(m); |
| 420 | return NULL; |
| 421 | } |
| 422 | KASSERT(needed_space <= MHLEN, |
| 423 | ("not enough room, need %u got %zu\n", needed_space, MHLEN)); |
| 424 | /* |
| 425 | * Setup new mbuf to have leading space to prepend the |
| 426 | * 802.11 header and any crypto header bits that are |
| 427 | * required (the latter are added when the driver calls |
| 428 | * back to ieee80211_crypto_encap to do crypto encapsulation). |
| 429 | */ |
| 430 | /* NB: must be first 'cuz it clobbers m_data */ |
| 431 | m_move_pkthdr(n, m); |
| 432 | n->m_len = 0; /* NB: m_gethdr does not set */ |
| 433 | n->m_data += needed_space; |
| 434 | /* |
| 435 | * Pull up Ethernet header to create the expected layout. |
| 436 | * We could use m_pullup but that's overkill (i.e. we don't |
| 437 | * need the actual data) and it cannot fail so do it inline |
| 438 | * for speed. |
| 439 | */ |
| 440 | /* NB: struct ether_header is known to be contiguous */ |
| 441 | n->m_len += sizeof(struct ether_header); |
| 442 | m->m_len -= sizeof(struct ether_header); |
| 443 | m->m_data += sizeof(struct ether_header); |
| 444 | /* |
| 445 | * Replace the head of the chain. |
| 446 | */ |
| 447 | n->m_next = m; |
| 448 | m = n; |
| 449 | } |
| 450 | return m; |
| 451 | #undef TO_BE_RECLAIMED |
| 452 | } |
| 453 | |
| 454 | #define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none) |
| 455 | /* |
| 456 | * Return the transmit key to use in sending a unicast frame. |
| 457 | * If a unicast key is set we use that. When no unicast key is set |
| 458 | * we fall back to the default transmit key. |
| 459 | */ |
| 460 | static __inline struct ieee80211_key * |
| 461 | ieee80211_crypto_getucastkey(struct ieee80211com *ic, struct ieee80211_node *ni) |
| 462 | { |
| 463 | if (KEY_UNDEFINED(ni->ni_ucastkey)) { |
| 464 | if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE || |
| 465 | KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey])) |
| 466 | return NULL; |
| 467 | return &ic->ic_nw_keys[ic->ic_def_txkey]; |
| 468 | } else { |
| 469 | return &ni->ni_ucastkey; |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * Return the transmit key to use in sending a multicast frame. |
| 475 | * Multicast traffic always uses the group key which is installed as |
| 476 | * the default tx key. |
| 477 | */ |
| 478 | static __inline struct ieee80211_key * |
| 479 | ieee80211_crypto_getmcastkey(struct ieee80211com *ic, struct ieee80211_node *ni) |
| 480 | { |
| 481 | if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE || |
| 482 | KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey])) |
| 483 | return NULL; |
| 484 | return &ic->ic_nw_keys[ic->ic_def_txkey]; |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * Encapsulate an outbound data frame. The mbuf chain is updated. |
| 489 | * If an error is encountered NULL is returned. The caller is required |
| 490 | * to provide a node reference and pullup the ethernet header in the |
| 491 | * first mbuf. |
| 492 | */ |
| 493 | struct mbuf * |
| 494 | ieee80211_encap(struct ieee80211com *ic, struct mbuf *m, |
| 495 | struct ieee80211_node *ni) |
| 496 | { |
| 497 | struct ether_header eh; |
| 498 | struct ieee80211_frame *wh; |
| 499 | struct ieee80211_key *key; |
| 500 | struct llc *llc; |
| 501 | int hdrsize, datalen, addqos; |
| 502 | |
| 503 | KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); |
| 504 | memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header)); |
| 505 | |
| 506 | /* |
| 507 | * Insure space for additional headers. First identify |
| 508 | * transmit key to use in calculating any buffer adjustments |
| 509 | * required. This is also used below to do privacy |
| 510 | * encapsulation work. Then calculate the 802.11 header |
| 511 | * size and any padding required by the driver. |
| 512 | * |
| 513 | * Note key may be NULL if we fall back to the default |
| 514 | * transmit key and that is not set. In that case the |
| 515 | * buffer may not be expanded as needed by the cipher |
| 516 | * routines, but they will/should discard it. |
| 517 | */ |
| 518 | if (ic->ic_flags & IEEE80211_F_PRIVACY) { |
| 519 | if (ic->ic_opmode == IEEE80211_M_STA || |
| 520 | !IEEE80211_IS_MULTICAST(eh.ether_dhost)) |
| 521 | key = ieee80211_crypto_getucastkey(ic, ni); |
| 522 | else |
| 523 | key = ieee80211_crypto_getmcastkey(ic, ni); |
| 524 | if (key == NULL && eh.ether_type != htons(ETHERTYPE_PAE)) { |
| 525 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, |
| 526 | "[%6D] no default transmit key (%s) deftxkey %u\n", |
| 527 | eh.ether_dhost, ":", __func__, |
| 528 | ic->ic_def_txkey); |
| 529 | ic->ic_stats.is_tx_nodefkey++; |
| 530 | } |
| 531 | } else |
| 532 | key = NULL; |
| 533 | /* XXX 4-address format */ |
| 534 | /* |
| 535 | * XXX Some ap's don't handle QoS-encapsulated EAPOL |
| 536 | * frames so suppress use. This may be an issue if other |
| 537 | * ap's require all data frames to be QoS-encapsulated |
| 538 | * once negotiated in which case we'll need to make this |
| 539 | * configurable. |
| 540 | */ |
| 541 | addqos = (ni->ni_flags & IEEE80211_NODE_QOS) && |
| 542 | eh.ether_type != htons(ETHERTYPE_PAE); |
| 543 | if (addqos) |
| 544 | hdrsize = sizeof(struct ieee80211_qosframe); |
| 545 | else |
| 546 | hdrsize = sizeof(struct ieee80211_frame); |
| 547 | if (ic->ic_flags & IEEE80211_F_DATAPAD) |
| 548 | hdrsize = roundup(hdrsize, sizeof(uint32_t)); |
| 549 | m = ieee80211_mbuf_adjust(ic, hdrsize, key, m); |
| 550 | if (m == NULL) { |
| 551 | /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ |
| 552 | goto bad; |
| 553 | } |
| 554 | |
| 555 | /* NB: this could be optimized because of ieee80211_mbuf_adjust */ |
| 556 | m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); |
| 557 | llc = mtod(m, struct llc *); |
| 558 | llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; |
| 559 | llc->llc_control = LLC_UI; |
| 560 | llc->llc_snap.org_code[0] = 0; |
| 561 | llc->llc_snap.org_code[1] = 0; |
| 562 | llc->llc_snap.org_code[2] = 0; |
| 563 | llc->llc_snap.ether_type = eh.ether_type; |
| 564 | datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ |
| 565 | |
| 566 | M_PREPEND(m, hdrsize, MB_DONTWAIT); |
| 567 | if (m == NULL) { |
| 568 | ic->ic_stats.is_tx_nobuf++; |
| 569 | goto bad; |
| 570 | } |
| 571 | wh = mtod(m, struct ieee80211_frame *); |
| 572 | wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; |
| 573 | *(uint16_t *)wh->i_dur = 0; |
| 574 | switch (ic->ic_opmode) { |
| 575 | case IEEE80211_M_STA: |
| 576 | wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; |
| 577 | IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); |
| 578 | IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); |
| 579 | IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); |
| 580 | break; |
| 581 | case IEEE80211_M_IBSS: |
| 582 | case IEEE80211_M_AHDEMO: |
| 583 | wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; |
| 584 | IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); |
| 585 | IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); |
| 586 | /* |
| 587 | * NB: always use the bssid from ic_bss as the |
| 588 | * neighbor's may be stale after an ibss merge |
| 589 | */ |
| 590 | IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_bss->ni_bssid); |
| 591 | break; |
| 592 | case IEEE80211_M_HOSTAP: |
| 593 | wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; |
| 594 | IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); |
| 595 | IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); |
| 596 | IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); |
| 597 | break; |
| 598 | case IEEE80211_M_MONITOR: |
| 599 | goto bad; |
| 600 | } |
| 601 | if (m->m_flags & M_MORE_DATA) |
| 602 | wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; |
| 603 | if (addqos) { |
| 604 | struct ieee80211_qosframe *qwh = |
| 605 | (struct ieee80211_qosframe *) wh; |
| 606 | int ac, tid; |
| 607 | |
| 608 | ac = M_WME_GETAC(m); |
| 609 | /* map from access class/queue to 11e header priorty value */ |
| 610 | tid = WME_AC_TO_TID(ac); |
| 611 | qwh->i_qos[0] = tid & IEEE80211_QOS_TID; |
| 612 | if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) |
| 613 | qwh->i_qos[0] |= 1 << IEEE80211_QOS_ACKPOLICY_S; |
| 614 | qwh->i_qos[1] = 0; |
| 615 | qwh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; |
| 616 | |
| 617 | *(uint16_t *)wh->i_seq = |
| 618 | htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT); |
| 619 | ni->ni_txseqs[tid]++; |
| 620 | } else { |
| 621 | *(uint16_t *)wh->i_seq = |
| 622 | htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); |
| 623 | ni->ni_txseqs[0]++; |
| 624 | } |
| 625 | if (key != NULL) { |
| 626 | /* |
| 627 | * IEEE 802.1X: send EAPOL frames always in the clear. |
| 628 | * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. |
| 629 | */ |
| 630 | if (eh.ether_type != htons(ETHERTYPE_PAE) || |
| 631 | ((ic->ic_flags & IEEE80211_F_WPA) && |
| 632 | (ic->ic_opmode == IEEE80211_M_STA ? |
| 633 | !KEY_UNDEFINED(*key) : !KEY_UNDEFINED(ni->ni_ucastkey)))) { |
| 634 | wh->i_fc[1] |= IEEE80211_FC1_WEP; |
| 635 | /* XXX do fragmentation */ |
| 636 | if (!ieee80211_crypto_enmic(ic, key, m, 0)) { |
| 637 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, |
| 638 | "[%6D] enmic failed, discard frame\n", |
| 639 | eh.ether_dhost, ":"); |
| 640 | ic->ic_stats.is_crypto_enmicfail++; |
| 641 | goto bad; |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | IEEE80211_NODE_STAT(ni, tx_data); |
| 647 | if (IEEE80211_IS_MULTICAST(wh->i_addr1)) |
| 648 | IEEE80211_NODE_STAT(ni, tx_mcast); |
| 649 | else |
| 650 | IEEE80211_NODE_STAT(ni, tx_ucast); |
| 651 | IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); |
| 652 | |
| 653 | return m; |
| 654 | bad: |
| 655 | if (m != NULL) |
| 656 | m_freem(m); |
| 657 | return NULL; |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * Add a supported rates element id to a frame. |
| 662 | */ |
| 663 | uint8_t * |
| 664 | ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) |
| 665 | { |
| 666 | int nrates; |
| 667 | |
| 668 | *frm++ = IEEE80211_ELEMID_RATES; |
| 669 | nrates = rs->rs_nrates; |
| 670 | if (nrates > IEEE80211_RATE_SIZE) |
| 671 | nrates = IEEE80211_RATE_SIZE; |
| 672 | *frm++ = nrates; |
| 673 | memcpy(frm, rs->rs_rates, nrates); |
| 674 | return frm + nrates; |
| 675 | } |
| 676 | |
| 677 | /* |
| 678 | * Add an extended supported rates element id to a frame. |
| 679 | */ |
| 680 | uint8_t * |
| 681 | ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) |
| 682 | { |
| 683 | /* |
| 684 | * Add an extended supported rates element if operating in 11g mode. |
| 685 | */ |
| 686 | if (rs->rs_nrates > IEEE80211_RATE_SIZE) { |
| 687 | int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; |
| 688 | *frm++ = IEEE80211_ELEMID_XRATES; |
| 689 | *frm++ = nrates; |
| 690 | memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); |
| 691 | frm += nrates; |
| 692 | } |
| 693 | return frm; |
| 694 | } |
| 695 | |
| 696 | /* |
| 697 | * Add an ssid elemet to a frame. |
| 698 | */ |
| 699 | uint8_t * |
| 700 | ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) |
| 701 | { |
| 702 | *frm++ = IEEE80211_ELEMID_SSID; |
| 703 | *frm++ = len; |
| 704 | memcpy(frm, ssid, len); |
| 705 | return frm + len; |
| 706 | } |
| 707 | |
| 708 | /* |
| 709 | * Add an erp element to a frame. |
| 710 | */ |
| 711 | static uint8_t * |
| 712 | ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) |
| 713 | { |
| 714 | uint8_t erp; |
| 715 | |
| 716 | *frm++ = IEEE80211_ELEMID_ERP; |
| 717 | *frm++ = 1; |
| 718 | erp = 0; |
| 719 | if (ic->ic_nonerpsta != 0) |
| 720 | erp |= IEEE80211_ERP_NON_ERP_PRESENT; |
| 721 | if (ic->ic_flags & IEEE80211_F_USEPROT) |
| 722 | erp |= IEEE80211_ERP_USE_PROTECTION; |
| 723 | if (ic->ic_flags & IEEE80211_F_USEBARKER) |
| 724 | erp |= IEEE80211_ERP_LONG_PREAMBLE; |
| 725 | *frm++ = erp; |
| 726 | return frm; |
| 727 | } |
| 728 | |
| 729 | static uint8_t * |
| 730 | ieee80211_setup_wpa_ie(struct ieee80211com *ic, uint8_t *ie) |
| 731 | { |
| 732 | #define WPA_OUI_BYTES 0x00, 0x50, 0xf2 |
| 733 | #define ADDSHORT(frm, v) do { \ |
| 734 | frm[0] = (v) & 0xff; \ |
| 735 | frm[1] = (v) >> 8; \ |
| 736 | frm += 2; \ |
| 737 | } while (0) |
| 738 | #define ADDSELECTOR(frm, sel) do { \ |
| 739 | memcpy(frm, sel, 4); \ |
| 740 | frm += 4; \ |
| 741 | } while (0) |
| 742 | static const uint8_t oui[4] = { WPA_OUI_BYTES, WPA_OUI_TYPE }; |
| 743 | static const uint8_t cipher_suite[][4] = { |
| 744 | { WPA_OUI_BYTES, WPA_CSE_WEP40 }, /* NB: 40-bit */ |
| 745 | { WPA_OUI_BYTES, WPA_CSE_TKIP }, |
| 746 | { 0x00, 0x00, 0x00, 0x00 }, /* XXX WRAP */ |
| 747 | { WPA_OUI_BYTES, WPA_CSE_CCMP }, |
| 748 | { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */ |
| 749 | { WPA_OUI_BYTES, WPA_CSE_NULL }, |
| 750 | }; |
| 751 | static const uint8_t wep104_suite[4] = |
| 752 | { WPA_OUI_BYTES, WPA_CSE_WEP104 }; |
| 753 | static const uint8_t key_mgt_unspec[4] = |
| 754 | { WPA_OUI_BYTES, WPA_ASE_8021X_UNSPEC }; |
| 755 | static const uint8_t key_mgt_psk[4] = |
| 756 | { WPA_OUI_BYTES, WPA_ASE_8021X_PSK }; |
| 757 | const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn; |
| 758 | uint8_t *frm = ie; |
| 759 | uint8_t *selcnt; |
| 760 | |
| 761 | *frm++ = IEEE80211_ELEMID_VENDOR; |
| 762 | *frm++ = 0; /* length filled in below */ |
| 763 | memcpy(frm, oui, sizeof(oui)); /* WPA OUI */ |
| 764 | frm += sizeof(oui); |
| 765 | ADDSHORT(frm, WPA_VERSION); |
| 766 | |
| 767 | /* XXX filter out CKIP */ |
| 768 | |
| 769 | /* multicast cipher */ |
| 770 | if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP && |
| 771 | rsn->rsn_mcastkeylen >= 13) |
| 772 | ADDSELECTOR(frm, wep104_suite); |
| 773 | else |
| 774 | ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]); |
| 775 | |
| 776 | /* unicast cipher list */ |
| 777 | selcnt = frm; |
| 778 | ADDSHORT(frm, 0); /* selector count */ |
| 779 | if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) { |
| 780 | selcnt[0]++; |
| 781 | ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]); |
| 782 | } |
| 783 | if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) { |
| 784 | selcnt[0]++; |
| 785 | ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]); |
| 786 | } |
| 787 | |
| 788 | /* authenticator selector list */ |
| 789 | selcnt = frm; |
| 790 | ADDSHORT(frm, 0); /* selector count */ |
| 791 | if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) { |
| 792 | selcnt[0]++; |
| 793 | ADDSELECTOR(frm, key_mgt_unspec); |
| 794 | } |
| 795 | if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) { |
| 796 | selcnt[0]++; |
| 797 | ADDSELECTOR(frm, key_mgt_psk); |
| 798 | } |
| 799 | |
| 800 | /* optional capabilities */ |
| 801 | if (rsn->rsn_caps != 0 && rsn->rsn_caps != RSN_CAP_PREAUTH) |
| 802 | ADDSHORT(frm, rsn->rsn_caps); |
| 803 | |
| 804 | /* calculate element length */ |
| 805 | ie[1] = frm - ie - 2; |
| 806 | KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa), |
| 807 | ("WPA IE too big, %u > %zu", |
| 808 | ie[1]+2, sizeof(struct ieee80211_ie_wpa))); |
| 809 | return frm; |
| 810 | #undef ADDSHORT |
| 811 | #undef ADDSELECTOR |
| 812 | #undef WPA_OUI_BYTES |
| 813 | } |
| 814 | |
| 815 | static uint8_t * |
| 816 | ieee80211_setup_rsn_ie(struct ieee80211com *ic, uint8_t *ie) |
| 817 | { |
| 818 | #define RSN_OUI_BYTES 0x00, 0x0f, 0xac |
| 819 | #define ADDSHORT(frm, v) do { \ |
| 820 | frm[0] = (v) & 0xff; \ |
| 821 | frm[1] = (v) >> 8; \ |
| 822 | frm += 2; \ |
| 823 | } while (0) |
| 824 | #define ADDSELECTOR(frm, sel) do { \ |
| 825 | memcpy(frm, sel, 4); \ |
| 826 | frm += 4; \ |
| 827 | } while (0) |
| 828 | static const uint8_t cipher_suite[][4] = { |
| 829 | { RSN_OUI_BYTES, RSN_CSE_WEP40 }, /* NB: 40-bit */ |
| 830 | { RSN_OUI_BYTES, RSN_CSE_TKIP }, |
| 831 | { RSN_OUI_BYTES, RSN_CSE_WRAP }, |
| 832 | { RSN_OUI_BYTES, RSN_CSE_CCMP }, |
| 833 | { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */ |
| 834 | { RSN_OUI_BYTES, RSN_CSE_NULL }, |
| 835 | }; |
| 836 | static const uint8_t wep104_suite[4] = |
| 837 | { RSN_OUI_BYTES, RSN_CSE_WEP104 }; |
| 838 | static const uint8_t key_mgt_unspec[4] = |
| 839 | { RSN_OUI_BYTES, RSN_ASE_8021X_UNSPEC }; |
| 840 | static const uint8_t key_mgt_psk[4] = |
| 841 | { RSN_OUI_BYTES, RSN_ASE_8021X_PSK }; |
| 842 | const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn; |
| 843 | uint8_t *frm = ie; |
| 844 | uint8_t *selcnt; |
| 845 | |
| 846 | *frm++ = IEEE80211_ELEMID_RSN; |
| 847 | *frm++ = 0; /* length filled in below */ |
| 848 | ADDSHORT(frm, RSN_VERSION); |
| 849 | |
| 850 | /* XXX filter out CKIP */ |
| 851 | |
| 852 | /* multicast cipher */ |
| 853 | if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP && |
| 854 | rsn->rsn_mcastkeylen >= 13) |
| 855 | ADDSELECTOR(frm, wep104_suite); |
| 856 | else |
| 857 | ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]); |
| 858 | |
| 859 | /* unicast cipher list */ |
| 860 | selcnt = frm; |
| 861 | ADDSHORT(frm, 0); /* selector count */ |
| 862 | if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) { |
| 863 | selcnt[0]++; |
| 864 | ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]); |
| 865 | } |
| 866 | if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) { |
| 867 | selcnt[0]++; |
| 868 | ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]); |
| 869 | } |
| 870 | |
| 871 | /* authenticator selector list */ |
| 872 | selcnt = frm; |
| 873 | ADDSHORT(frm, 0); /* selector count */ |
| 874 | if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) { |
| 875 | selcnt[0]++; |
| 876 | ADDSELECTOR(frm, key_mgt_unspec); |
| 877 | } |
| 878 | if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) { |
| 879 | selcnt[0]++; |
| 880 | ADDSELECTOR(frm, key_mgt_psk); |
| 881 | } |
| 882 | |
| 883 | /* optional capabilities */ |
| 884 | ADDSHORT(frm, rsn->rsn_caps); |
| 885 | /* XXX PMKID */ |
| 886 | |
| 887 | /* calculate element length */ |
| 888 | ie[1] = frm - ie - 2; |
| 889 | KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa), |
| 890 | ("RSN IE too big, %u > %zu", |
| 891 | ie[1]+2, sizeof(struct ieee80211_ie_wpa))); |
| 892 | return frm; |
| 893 | #undef ADDSELECTOR |
| 894 | #undef ADDSHORT |
| 895 | #undef RSN_OUI_BYTES |
| 896 | } |
| 897 | |
| 898 | /* |
| 899 | * Add a WPA/RSN element to a frame. |
| 900 | */ |
| 901 | static uint8_t * |
| 902 | ieee80211_add_wpa(uint8_t *frm, struct ieee80211com *ic) |
| 903 | { |
| 904 | |
| 905 | KASSERT(ic->ic_flags & IEEE80211_F_WPA, ("no WPA/RSN!")); |
| 906 | if (ic->ic_flags & IEEE80211_F_WPA2) |
| 907 | frm = ieee80211_setup_rsn_ie(ic, frm); |
| 908 | if (ic->ic_flags & IEEE80211_F_WPA1) |
| 909 | frm = ieee80211_setup_wpa_ie(ic, frm); |
| 910 | return frm; |
| 911 | } |
| 912 | |
| 913 | #define WME_OUI_BYTES 0x00, 0x50, 0xf2 |
| 914 | /* |
| 915 | * Add a WME information element to a frame. |
| 916 | */ |
| 917 | static uint8_t * |
| 918 | ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) |
| 919 | { |
| 920 | static const struct ieee80211_wme_info info = { |
| 921 | .wme_id = IEEE80211_ELEMID_VENDOR, |
| 922 | .wme_len = sizeof(struct ieee80211_wme_info) - 2, |
| 923 | .wme_oui = { WME_OUI_BYTES }, |
| 924 | .wme_type = WME_OUI_TYPE, |
| 925 | .wme_subtype = WME_INFO_OUI_SUBTYPE, |
| 926 | .wme_version = WME_VERSION, |
| 927 | .wme_info = 0, |
| 928 | }; |
| 929 | memcpy(frm, &info, sizeof(info)); |
| 930 | return frm + sizeof(info); |
| 931 | } |
| 932 | |
| 933 | /* |
| 934 | * Add a WME parameters element to a frame. |
| 935 | */ |
| 936 | static uint8_t * |
| 937 | ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) |
| 938 | { |
| 939 | #define SM(_v, _f) (((_v) << _f##_S) & _f) |
| 940 | #define ADDSHORT(frm, v) do { \ |
| 941 | frm[0] = (v) & 0xff; \ |
| 942 | frm[1] = (v) >> 8; \ |
| 943 | frm += 2; \ |
| 944 | } while (0) |
| 945 | /* NB: this works 'cuz a param has an info at the front */ |
| 946 | static const struct ieee80211_wme_info param = { |
| 947 | .wme_id = IEEE80211_ELEMID_VENDOR, |
| 948 | .wme_len = sizeof(struct ieee80211_wme_param) - 2, |
| 949 | .wme_oui = { WME_OUI_BYTES }, |
| 950 | .wme_type = WME_OUI_TYPE, |
| 951 | .wme_subtype = WME_PARAM_OUI_SUBTYPE, |
| 952 | .wme_version = WME_VERSION, |
| 953 | }; |
| 954 | int i; |
| 955 | |
| 956 | memcpy(frm, ¶m, sizeof(param)); |
| 957 | frm += __offsetof(struct ieee80211_wme_info, wme_info); |
| 958 | *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ |
| 959 | *frm++ = 0; /* reserved field */ |
| 960 | for (i = 0; i < WME_NUM_AC; i++) { |
| 961 | const struct wmeParams *ac = |
| 962 | &wme->wme_bssChanParams.cap_wmeParams[i]; |
| 963 | *frm++ = SM(i, WME_PARAM_ACI) |
| 964 | | SM(ac->wmep_acm, WME_PARAM_ACM) |
| 965 | | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) |
| 966 | ; |
| 967 | *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) |
| 968 | | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) |
| 969 | ; |
| 970 | ADDSHORT(frm, ac->wmep_txopLimit); |
| 971 | } |
| 972 | return frm; |
| 973 | #undef SM |
| 974 | #undef ADDSHORT |
| 975 | } |
| 976 | #undef WME_OUI_BYTES |
| 977 | |
| 978 | /* |
| 979 | * Send a probe request frame with the specified ssid |
| 980 | * and any optional information element data. |
| 981 | */ |
| 982 | int |
| 983 | ieee80211_send_probereq(struct ieee80211_node *ni, |
| 984 | const uint8_t sa[IEEE80211_ADDR_LEN], |
| 985 | const uint8_t da[IEEE80211_ADDR_LEN], |
| 986 | const uint8_t bssid[IEEE80211_ADDR_LEN], |
| 987 | const uint8_t *ssid, size_t ssidlen, |
| 988 | const void *optie, size_t optielen) |
| 989 | { |
| 990 | struct ieee80211com *ic = ni->ni_ic; |
| 991 | struct ifnet *ifp = ic->ic_ifp; |
| 992 | enum ieee80211_phymode mode; |
| 993 | struct ieee80211_frame *wh; |
| 994 | struct ieee80211_rateset rs; |
| 995 | struct mbuf *m; |
| 996 | uint8_t *frm; |
| 997 | |
| 998 | /* |
| 999 | * Hold a reference on the node so it doesn't go away until after |
| 1000 | * the xmit is complete all the way in the driver. On error we |
| 1001 | * will remove our reference. |
| 1002 | */ |
| 1003 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, |
| 1004 | "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", |
| 1005 | __func__, __LINE__, |
| 1006 | ni, ni->ni_macaddr, ":", |
| 1007 | ieee80211_node_refcnt(ni) + 1); |
| 1008 | ieee80211_ref_node(ni); |
| 1009 | |
| 1010 | /* |
| 1011 | * prreq frame format |
| 1012 | * [tlv] ssid |
| 1013 | * [tlv] supported rates |
| 1014 | * [tlv] extended supported rates |
| 1015 | * [tlv] user-specified ie's |
| 1016 | */ |
| 1017 | m = ieee80211_getmgtframe(&frm, |
| 1018 | 2 + IEEE80211_NWID_LEN |
| 1019 | + 2 + IEEE80211_RATE_SIZE |
| 1020 | + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) |
| 1021 | + (optie != NULL ? optielen : 0) |
| 1022 | ); |
| 1023 | if (m == NULL) { |
| 1024 | ic->ic_stats.is_tx_nobuf++; |
| 1025 | ieee80211_free_node(ni); |
| 1026 | return ENOMEM; |
| 1027 | } |
| 1028 | |
| 1029 | frm = ieee80211_add_ssid(frm, ssid, ssidlen); |
| 1030 | |
| 1031 | /* |
| 1032 | * XXX |
| 1033 | * Clear basic rates. |
| 1034 | * |
| 1035 | * Though according to 802.11 standard: MSB of each supported rate |
| 1036 | * octet in (Extended) Supported Rates ie of probe requests should |
| 1037 | * be ignored, some HostAP implementations still check it ... |
| 1038 | */ |
| 1039 | mode = ieee80211_chan2mode(ic, ic->ic_curchan); |
| 1040 | rs = ic->ic_sup_rates[mode]; |
| 1041 | ieee80211_set_basicrates(&rs, IEEE80211_MODE_AUTO, 0); |
| 1042 | frm = ieee80211_add_rates(frm, &rs); |
| 1043 | frm = ieee80211_add_xrates(frm, &rs); |
| 1044 | |
| 1045 | if (optie != NULL) { |
| 1046 | memcpy(frm, optie, optielen); |
| 1047 | frm += optielen; |
| 1048 | } |
| 1049 | m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); |
| 1050 | |
| 1051 | M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT); |
| 1052 | if (m == NULL) |
| 1053 | return ENOMEM; |
| 1054 | KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null")); |
| 1055 | m->m_pkthdr.rcvif = (void *)ni; |
| 1056 | |
| 1057 | wh = mtod(m, struct ieee80211_frame *); |
| 1058 | ieee80211_send_setup(ic, ni, wh, |
| 1059 | IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, |
| 1060 | sa, da, bssid); |
| 1061 | /* XXX power management? */ |
| 1062 | |
| 1063 | IEEE80211_NODE_STAT(ni, tx_probereq); |
| 1064 | IEEE80211_NODE_STAT(ni, tx_mgmt); |
| 1065 | |
| 1066 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, |
| 1067 | "[%6D] send probe req on channel %u\n", |
| 1068 | wh->i_addr1, ":", |
| 1069 | ieee80211_chan2ieee(ic, ic->ic_curchan)); |
| 1070 | |
| 1071 | IF_ENQUEUE(&ic->ic_mgtq, m); |
| 1072 | ifp->if_start(ifp); |
| 1073 | return 0; |
| 1074 | } |
| 1075 | |
| 1076 | /* |
| 1077 | * Calculate capability information for mgt frames. |
| 1078 | */ |
| 1079 | static uint16_t |
| 1080 | getcapinfo(struct ieee80211com *ic, struct ieee80211_channel *chan) |
| 1081 | { |
| 1082 | uint16_t capinfo; |
| 1083 | |
| 1084 | KASSERT(ic->ic_opmode != IEEE80211_M_STA, ("station mode")); |
| 1085 | |
| 1086 | if (ic->ic_opmode == IEEE80211_M_HOSTAP) |
| 1087 | capinfo = IEEE80211_CAPINFO_ESS; |
| 1088 | else if (ic->ic_opmode == IEEE80211_M_IBSS) |
| 1089 | capinfo = IEEE80211_CAPINFO_IBSS; |
| 1090 | else |
| 1091 | capinfo = 0; |
| 1092 | if (ic->ic_flags & IEEE80211_F_PRIVACY) |
| 1093 | capinfo |= IEEE80211_CAPINFO_PRIVACY; |
| 1094 | if (IEEE80211_IS_CHAN_2GHZ(chan)) { |
| 1095 | if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) |
| 1096 | capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; |
| 1097 | if (ic->ic_caps_ext & IEEE80211_CEXT_PBCC) |
| 1098 | capinfo |= IEEE80211_CAPINFO_PBCC; |
| 1099 | } |
| 1100 | if (ic->ic_flags & IEEE80211_F_SHSLOT) |
| 1101 | capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; |
| 1102 | return capinfo; |
| 1103 | } |
| 1104 | |
| 1105 | static struct mbuf * |
| 1106 | _ieee80211_probe_resp_alloc(struct ieee80211com *ic, struct ieee80211_node *ni) |
| 1107 | { |
| 1108 | const struct ieee80211_rateset *rs; |
| 1109 | uint16_t capinfo; |
| 1110 | struct mbuf *m; |
| 1111 | uint8_t *frm; |
| 1112 | int pktlen; |
| 1113 | |
| 1114 | /* |
| 1115 | * probe response frame format |
| 1116 | * [8] time stamp |
| 1117 | * [2] beacon interval |
| 1118 | * [2] cabability information |
| 1119 | * [tlv] ssid |
| 1120 | * [tlv] supported rates |
| 1121 | * [tlv] parameter set (FH/DS) |
| 1122 | * [4] parameter set (IBSS) |
| 1123 | * [tlv] extended rate phy (ERP) |
| 1124 | * [tlv] extended supported rates |
| 1125 | * [tlv] WPA |
| 1126 | * [tlv] WME (optional) |
| 1127 | */ |
| 1128 | KKASSERT(ic->ic_curmode != IEEE80211_MODE_AUTO); |
| 1129 | rs = &ic->ic_sup_rates[ic->ic_curmode]; |
| 1130 | pktlen = 8 /* time stamp */ |
| 1131 | + sizeof(uint16_t) /* beacon interval */ |
| 1132 | + sizeof(uint16_t) /* capabilities */ |
| 1133 | + 2 + ni->ni_esslen /* ssid */ |
| 1134 | + 2 + IEEE80211_RATE_SIZE /* supported rates */ |
| 1135 | + 2 + 5 /* max(5,1) */ /* DS/FH parameters */ |
| 1136 | + 2 + 2 /* IBSS parameters */ |
| 1137 | + 2 + 1 /* ERP */ |
| 1138 | + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) |
| 1139 | /* XXX !WPA1+WPA2 fits w/o a cluster */ |
| 1140 | + (ic->ic_flags & IEEE80211_F_WPA ? /* WPA 1+2 */ |
| 1141 | 2*sizeof(struct ieee80211_ie_wpa) : 0) |
| 1142 | + sizeof(struct ieee80211_wme_param); /* WME */ |
| 1143 | |
| 1144 | m = ieee80211_getmgtframe(&frm, pktlen); |
| 1145 | if (m == NULL) { |
| 1146 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 1147 | "%s: cannot get buf; size %u\n", __func__, pktlen); |
| 1148 | ic->ic_stats.is_tx_nobuf++; |
| 1149 | return NULL; |
| 1150 | } |
| 1151 | |
| 1152 | memset(frm, 0, 8); /* timestamp should be filled later */ |
| 1153 | frm += 8; |
| 1154 | *(uint16_t *)frm = htole16(ni->ni_intval); |
| 1155 | frm += 2; |
| 1156 | capinfo = getcapinfo(ic, ni->ni_chan); |
| 1157 | *(uint16_t *)frm = htole16(capinfo); |
| 1158 | frm += 2; |
| 1159 | |
| 1160 | frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); |
| 1161 | frm = ieee80211_add_rates(frm, rs); |
| 1162 | |
| 1163 | if (ic->ic_phytype == IEEE80211_T_FH) { |
| 1164 | *frm++ = IEEE80211_ELEMID_FHPARMS; |
| 1165 | *frm++ = 5; |
| 1166 | *frm++ = ni->ni_fhdwell & 0x00ff; |
| 1167 | *frm++ = (ni->ni_fhdwell >> 8) & 0x00ff; |
| 1168 | *frm++ = IEEE80211_FH_CHANSET( |
| 1169 | ieee80211_chan2ieee(ic, ni->ni_chan)); |
| 1170 | *frm++ = IEEE80211_FH_CHANPAT( |
| 1171 | ieee80211_chan2ieee(ic, ni->ni_chan)); |
| 1172 | *frm++ = ni->ni_fhindex; |
| 1173 | } else { |
| 1174 | *frm++ = IEEE80211_ELEMID_DSPARMS; |
| 1175 | *frm++ = 1; |
| 1176 | *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); |
| 1177 | } |
| 1178 | |
| 1179 | if (ic->ic_opmode == IEEE80211_M_IBSS) { |
| 1180 | *frm++ = IEEE80211_ELEMID_IBSSPARMS; |
| 1181 | *frm++ = 2; |
| 1182 | *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ |
| 1183 | } |
| 1184 | if (ic->ic_flags & IEEE80211_F_WPA) |
| 1185 | frm = ieee80211_add_wpa(frm, ic); |
| 1186 | if (ic->ic_curmode == IEEE80211_MODE_11G) |
| 1187 | frm = ieee80211_add_erp(frm, ic); |
| 1188 | frm = ieee80211_add_xrates(frm, rs); |
| 1189 | if (ic->ic_flags & IEEE80211_F_WME) |
| 1190 | frm = ieee80211_add_wme_param(frm, &ic->ic_wme); |
| 1191 | m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); |
| 1192 | KKASSERT(m->m_len <= pktlen); |
| 1193 | |
| 1194 | return m; |
| 1195 | } |
| 1196 | |
| 1197 | /* |
| 1198 | * Send a management frame. The node is for the destination (or ic_bss |
| 1199 | * when in station mode). Nodes other than ic_bss have their reference |
| 1200 | * count bumped to reflect our use for an indeterminant time. |
| 1201 | */ |
| 1202 | int |
| 1203 | ieee80211_send_mgmt(struct ieee80211com *ic, struct ieee80211_node *ni, |
| 1204 | int type, int arg) |
| 1205 | { |
| 1206 | #define senderr(_x, _v) do { ic->ic_stats._v++; ret = _x; goto bad; } while (0) |
| 1207 | struct mbuf *m; |
| 1208 | uint8_t *frm; |
| 1209 | uint16_t capinfo; |
| 1210 | int has_challenge, is_shared_key, ret, timer, status, encrypt; |
| 1211 | const struct ieee80211_rateset *rs; |
| 1212 | |
| 1213 | KASSERT(ni != NULL, ("null node")); |
| 1214 | |
| 1215 | /* |
| 1216 | * Hold a reference on the node so it doesn't go away until after |
| 1217 | * the xmit is complete all the way in the driver. On error we |
| 1218 | * will remove our reference. |
| 1219 | */ |
| 1220 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, |
| 1221 | "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", |
| 1222 | __func__, __LINE__, |
| 1223 | ni, ni->ni_macaddr, ":", |
| 1224 | ieee80211_node_refcnt(ni) + 1); |
| 1225 | ieee80211_ref_node(ni); |
| 1226 | |
| 1227 | encrypt = 0; |
| 1228 | timer = 0; |
| 1229 | switch (type) { |
| 1230 | case IEEE80211_FC0_SUBTYPE_PROBE_RESP: |
| 1231 | m = _ieee80211_probe_resp_alloc(ic, ic->ic_bss); |
| 1232 | if (m == NULL) { |
| 1233 | /* NB: Statistics have been updated. */ |
| 1234 | ret = ENOMEM; |
| 1235 | goto bad; |
| 1236 | } |
| 1237 | break; |
| 1238 | |
| 1239 | case IEEE80211_FC0_SUBTYPE_AUTH: |
| 1240 | status = arg >> 16; |
| 1241 | arg &= 0xffff; |
| 1242 | has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || |
| 1243 | arg == IEEE80211_AUTH_SHARED_RESPONSE) && |
| 1244 | ni->ni_challenge != NULL); |
| 1245 | |
| 1246 | /* |
| 1247 | * Deduce whether we're doing open authentication or |
| 1248 | * shared key authentication. We do the latter if |
| 1249 | * we're in the middle of a shared key authentication |
| 1250 | * handshake or if we're initiating an authentication |
| 1251 | * request and configured to use shared key. |
| 1252 | */ |
| 1253 | is_shared_key = has_challenge || |
| 1254 | arg >= IEEE80211_AUTH_SHARED_RESPONSE || |
| 1255 | (arg == IEEE80211_AUTH_SHARED_REQUEST && |
| 1256 | ic->ic_bss->ni_authmode == IEEE80211_AUTH_SHARED); |
| 1257 | |
| 1258 | m = ieee80211_getmgtframe(&frm, |
| 1259 | 3 * sizeof(uint16_t) |
| 1260 | + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? |
| 1261 | sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) |
| 1262 | ); |
| 1263 | if (m == NULL) |
| 1264 | senderr(ENOMEM, is_tx_nobuf); |
| 1265 | |
| 1266 | ((uint16_t *)frm)[0] = |
| 1267 | (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) |
| 1268 | : htole16(IEEE80211_AUTH_ALG_OPEN); |
| 1269 | ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ |
| 1270 | ((uint16_t *)frm)[2] = htole16(status);/* status */ |
| 1271 | |
| 1272 | if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { |
| 1273 | ((uint16_t *)frm)[3] = |
| 1274 | htole16((IEEE80211_CHALLENGE_LEN << 8) | |
| 1275 | IEEE80211_ELEMID_CHALLENGE); |
| 1276 | memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, |
| 1277 | IEEE80211_CHALLENGE_LEN); |
| 1278 | m->m_pkthdr.len = m->m_len = |
| 1279 | 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; |
| 1280 | if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { |
| 1281 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, |
| 1282 | "[%6D] request encrypt frame (%s)\n", |
| 1283 | ni->ni_macaddr, ":", __func__); |
| 1284 | encrypt = 1; /* WEP-encrypt, please */ |
| 1285 | } |
| 1286 | } else |
| 1287 | m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); |
| 1288 | |
| 1289 | /* XXX not right for shared key */ |
| 1290 | if (status == IEEE80211_STATUS_SUCCESS) |
| 1291 | IEEE80211_NODE_STAT(ni, tx_auth); |
| 1292 | else |
| 1293 | IEEE80211_NODE_STAT(ni, tx_auth_fail); |
| 1294 | |
| 1295 | if (ic->ic_opmode == IEEE80211_M_STA) |
| 1296 | timer = IEEE80211_TRANS_WAIT; |
| 1297 | break; |
| 1298 | |
| 1299 | case IEEE80211_FC0_SUBTYPE_DEAUTH: |
| 1300 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, |
| 1301 | "[%6D] send station deauthenticate (reason %d)\n", |
| 1302 | ni->ni_macaddr, ":", arg); |
| 1303 | m = ieee80211_getmgtframe(&frm, sizeof(uint16_t)); |
| 1304 | if (m == NULL) |
| 1305 | senderr(ENOMEM, is_tx_nobuf); |
| 1306 | *(uint16_t *)frm = htole16(arg); /* reason */ |
| 1307 | m->m_pkthdr.len = m->m_len = sizeof(uint16_t); |
| 1308 | |
| 1309 | IEEE80211_NODE_STAT(ni, tx_deauth); |
| 1310 | IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); |
| 1311 | |
| 1312 | ieee80211_node_unauthorize(ni); /* port closed */ |
| 1313 | break; |
| 1314 | |
| 1315 | case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: |
| 1316 | case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: |
| 1317 | /* |
| 1318 | * asreq frame format |
| 1319 | * [2] capability information |
| 1320 | * [2] listen interval |
| 1321 | * [6*] current AP address (reassoc only) |
| 1322 | * [tlv] ssid |
| 1323 | * [tlv] supported rates |
| 1324 | * [tlv] extended supported rates |
| 1325 | * [tlv] WME |
| 1326 | * [tlv] user-specified ie's |
| 1327 | */ |
| 1328 | m = ieee80211_getmgtframe(&frm, |
| 1329 | sizeof(uint16_t) |
| 1330 | + sizeof(uint16_t) |
| 1331 | + IEEE80211_ADDR_LEN |
| 1332 | + 2 + IEEE80211_NWID_LEN |
| 1333 | + 2 + IEEE80211_RATE_SIZE |
| 1334 | + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) |
| 1335 | + sizeof(struct ieee80211_wme_info) |
| 1336 | + (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0) |
| 1337 | ); |
| 1338 | if (m == NULL) |
| 1339 | senderr(ENOMEM, is_tx_nobuf); |
| 1340 | |
| 1341 | KASSERT(ic->ic_opmode == IEEE80211_M_STA, |
| 1342 | ("wrong mode %u", ic->ic_opmode)); |
| 1343 | capinfo = IEEE80211_CAPINFO_ESS; |
| 1344 | if (ic->ic_flags & IEEE80211_F_PRIVACY) |
| 1345 | capinfo |= IEEE80211_CAPINFO_PRIVACY; |
| 1346 | /* |
| 1347 | * NB: Some 11a AP's reject the request when |
| 1348 | * short premable or PBCC modulation is set. |
| 1349 | */ |
| 1350 | if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) { |
| 1351 | if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) |
| 1352 | capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; |
| 1353 | if (ic->ic_caps_ext & IEEE80211_CEXT_PBCC) |
| 1354 | capinfo |= IEEE80211_CAPINFO_PBCC; |
| 1355 | } |
| 1356 | if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) && |
| 1357 | (ic->ic_caps & IEEE80211_C_SHSLOT)) |
| 1358 | capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; |
| 1359 | *(uint16_t *)frm = htole16(capinfo); |
| 1360 | frm += 2; |
| 1361 | |
| 1362 | *(uint16_t *)frm = htole16(ic->ic_lintval); |
| 1363 | frm += 2; |
| 1364 | |
| 1365 | if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { |
| 1366 | IEEE80211_ADDR_COPY(frm, ic->ic_bss->ni_bssid); |
| 1367 | frm += IEEE80211_ADDR_LEN; |
| 1368 | } |
| 1369 | |
| 1370 | frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); |
| 1371 | |
| 1372 | rs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)]; |
| 1373 | frm = ieee80211_add_rates(frm, rs); |
| 1374 | frm = ieee80211_add_xrates(frm, rs); |
| 1375 | |
| 1376 | if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL) |
| 1377 | frm = ieee80211_add_wme_info(frm, &ic->ic_wme); |
| 1378 | if (ic->ic_opt_ie != NULL) { |
| 1379 | memcpy(frm, ic->ic_opt_ie, ic->ic_opt_ie_len); |
| 1380 | frm += ic->ic_opt_ie_len; |
| 1381 | } |
| 1382 | m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); |
| 1383 | |
| 1384 | timer = IEEE80211_TRANS_WAIT; |
| 1385 | break; |
| 1386 | |
| 1387 | case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: |
| 1388 | case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: |
| 1389 | /* |
| 1390 | * asreq frame format |
| 1391 | * [2] capability information |
| 1392 | * [2] status |
| 1393 | * [2] association ID |
| 1394 | * [tlv] supported rates |
| 1395 | * [tlv] extended supported rates |
| 1396 | * [tlv] WME (if enabled and STA enabled) |
| 1397 | */ |
| 1398 | m = ieee80211_getmgtframe(&frm, |
| 1399 | sizeof(uint16_t) |
| 1400 | + sizeof(uint16_t) |
| 1401 | + sizeof(uint16_t) |
| 1402 | + 2 + IEEE80211_RATE_SIZE |
| 1403 | + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) |
| 1404 | + sizeof(struct ieee80211_wme_param) |
| 1405 | ); |
| 1406 | if (m == NULL) |
| 1407 | senderr(ENOMEM, is_tx_nobuf); |
| 1408 | |
| 1409 | capinfo = getcapinfo(ic, ic->ic_curchan); |
| 1410 | *(uint16_t *)frm = htole16(capinfo); |
| 1411 | frm += 2; |
| 1412 | |
| 1413 | *(uint16_t *)frm = htole16(arg); /* status */ |
| 1414 | frm += 2; |
| 1415 | |
| 1416 | if (arg == IEEE80211_STATUS_SUCCESS) { |
| 1417 | *(uint16_t *)frm = htole16(ni->ni_associd); |
| 1418 | IEEE80211_NODE_STAT(ni, tx_assoc); |
| 1419 | } else |
| 1420 | IEEE80211_NODE_STAT(ni, tx_assoc_fail); |
| 1421 | frm += 2; |
| 1422 | |
| 1423 | KKASSERT(ic->ic_curmode != IEEE80211_MODE_AUTO); |
| 1424 | rs = &ic->ic_sup_rates[ic->ic_curmode]; |
| 1425 | frm = ieee80211_add_rates(frm, rs); |
| 1426 | frm = ieee80211_add_xrates(frm, rs); |
| 1427 | if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL) |
| 1428 | frm = ieee80211_add_wme_param(frm, &ic->ic_wme); |
| 1429 | m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); |
| 1430 | break; |
| 1431 | |
| 1432 | case IEEE80211_FC0_SUBTYPE_DISASSOC: |
| 1433 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, |
| 1434 | "[%6D] send station disassociate (reason %d)\n", |
| 1435 | ni->ni_macaddr, ":", arg); |
| 1436 | m = ieee80211_getmgtframe(&frm, sizeof(uint16_t)); |
| 1437 | if (m == NULL) |
| 1438 | senderr(ENOMEM, is_tx_nobuf); |
| 1439 | *(uint16_t *)frm = htole16(arg); /* reason */ |
| 1440 | m->m_pkthdr.len = m->m_len = sizeof(uint16_t); |
| 1441 | |
| 1442 | IEEE80211_NODE_STAT(ni, tx_disassoc); |
| 1443 | IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); |
| 1444 | break; |
| 1445 | |
| 1446 | default: |
| 1447 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 1448 | "[%6D] invalid mgmt frame type %u\n", |
| 1449 | ni->ni_macaddr, ":", type); |
| 1450 | senderr(EINVAL, is_tx_unknownmgt); |
| 1451 | /* NOTREACHED */ |
| 1452 | } |
| 1453 | ret = ieee80211_mgmt_output(ic, ni, m, type, timer, encrypt); |
| 1454 | if (ret != 0) { |
| 1455 | bad: |
| 1456 | ieee80211_free_node(ni); |
| 1457 | } |
| 1458 | return ret; |
| 1459 | #undef senderr |
| 1460 | } |
| 1461 | |
| 1462 | /* |
| 1463 | * Allocate a probe response frame and fillin the appropriate bits. |
| 1464 | */ |
| 1465 | struct mbuf * |
| 1466 | ieee80211_probe_resp_alloc(struct ieee80211com *ic, struct ieee80211_node *ni) |
| 1467 | { |
| 1468 | struct ieee80211_frame *wh; |
| 1469 | struct mbuf *m; |
| 1470 | |
| 1471 | m = _ieee80211_probe_resp_alloc(ic, ni); |
| 1472 | if (m == NULL) |
| 1473 | return NULL; |
| 1474 | |
| 1475 | M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT); |
| 1476 | KASSERT(m != NULL, ("no space for 802.11 header?")); |
| 1477 | |
| 1478 | wh = mtod(m, struct ieee80211_frame *); |
| 1479 | wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | |
| 1480 | IEEE80211_FC0_SUBTYPE_PROBE_RESP; |
| 1481 | wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; |
| 1482 | *(uint16_t *)wh->i_dur = 0; |
| 1483 | bzero(wh->i_addr1, sizeof(wh->i_addr1)); |
| 1484 | IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); |
| 1485 | IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); |
| 1486 | *(uint16_t *)wh->i_seq = 0; |
| 1487 | |
| 1488 | return m; |
| 1489 | } |
| 1490 | |
| 1491 | /* |
| 1492 | * Allocate a beacon frame and fillin the appropriate bits. |
| 1493 | */ |
| 1494 | struct mbuf * |
| 1495 | ieee80211_beacon_alloc(struct ieee80211com *ic, struct ieee80211_node *ni, |
| 1496 | struct ieee80211_beacon_offsets *bo) |
| 1497 | { |
| 1498 | struct ifnet *ifp = ic->ic_ifp; |
| 1499 | struct ieee80211_frame *wh; |
| 1500 | struct mbuf *m; |
| 1501 | int pktlen; |
| 1502 | uint8_t *frm, *efrm; |
| 1503 | uint16_t capinfo; |
| 1504 | const struct ieee80211_rateset *rs; |
| 1505 | |
| 1506 | /* |
| 1507 | * beacon frame format |
| 1508 | * [8] time stamp |
| 1509 | * [2] beacon interval |
| 1510 | * [2] cabability information |
| 1511 | * [tlv] ssid |
| 1512 | * [tlv] supported rates |
| 1513 | * [3] parameter set (DS) |
| 1514 | * [tlv] parameter set (IBSS/TIM) |
| 1515 | * [tlv] extended rate phy (ERP) |
| 1516 | * [tlv] extended supported rates |
| 1517 | * [tlv] WME parameters |
| 1518 | * [tlv] WPA/RSN parameters |
| 1519 | * XXX Vendor-specific OIDs (e.g. Atheros) |
| 1520 | * NB: we allocate the max space required for the TIM bitmap. |
| 1521 | */ |
| 1522 | KKASSERT(ic->ic_curmode != IEEE80211_MODE_AUTO); |
| 1523 | rs = &ic->ic_sup_rates[ic->ic_curmode]; |
| 1524 | pktlen = 8 /* time stamp */ |
| 1525 | + sizeof(uint16_t) /* beacon interval */ |
| 1526 | + sizeof(uint16_t) /* capabilities */ |
| 1527 | + 2 + ni->ni_esslen /* ssid */ |
| 1528 | + 2 + IEEE80211_RATE_SIZE /* supported rates */ |
| 1529 | + 2 + 1 /* DS parameters */ |
| 1530 | + 2 + 4 + ic->ic_tim_len /* DTIM/IBSSPARMS */ |
| 1531 | + 2 + 1 /* ERP */ |
| 1532 | + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) |
| 1533 | + (ic->ic_caps & IEEE80211_C_WME ? /* WME */ |
| 1534 | sizeof(struct ieee80211_wme_param) : 0) |
| 1535 | + (ic->ic_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ |
| 1536 | 2*sizeof(struct ieee80211_ie_wpa) : 0) |
| 1537 | ; |
| 1538 | m = ieee80211_getmgtframe(&frm, pktlen); |
| 1539 | if (m == NULL) { |
| 1540 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 1541 | "%s: cannot get buf; size %u\n", __func__, pktlen); |
| 1542 | ic->ic_stats.is_tx_nobuf++; |
| 1543 | return NULL; |
| 1544 | } |
| 1545 | |
| 1546 | memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ |
| 1547 | frm += 8; |
| 1548 | *(uint16_t *)frm = htole16(ni->ni_intval); |
| 1549 | frm += 2; |
| 1550 | capinfo = getcapinfo(ic, ni->ni_chan); |
| 1551 | bo->bo_caps = (uint16_t *)frm; |
| 1552 | *(uint16_t *)frm = htole16(capinfo); |
| 1553 | frm += 2; |
| 1554 | *frm++ = IEEE80211_ELEMID_SSID; |
| 1555 | if ((ic->ic_flags & IEEE80211_F_HIDESSID) == 0) { |
| 1556 | *frm++ = ni->ni_esslen; |
| 1557 | memcpy(frm, ni->ni_essid, ni->ni_esslen); |
| 1558 | frm += ni->ni_esslen; |
| 1559 | } else |
| 1560 | *frm++ = 0; |
| 1561 | frm = ieee80211_add_rates(frm, rs); |
| 1562 | if (ic->ic_curmode != IEEE80211_MODE_FH) { |
| 1563 | *frm++ = IEEE80211_ELEMID_DSPARMS; |
| 1564 | *frm++ = 1; |
| 1565 | *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); |
| 1566 | } |
| 1567 | bo->bo_tim = frm; |
| 1568 | if (ic->ic_opmode == IEEE80211_M_IBSS) { |
| 1569 | *frm++ = IEEE80211_ELEMID_IBSSPARMS; |
| 1570 | *frm++ = 2; |
| 1571 | *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ |
| 1572 | bo->bo_tim_len = 0; |
| 1573 | } else if (ic->ic_opmode == IEEE80211_M_HOSTAP) { |
| 1574 | struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; |
| 1575 | |
| 1576 | tie->tim_ie = IEEE80211_ELEMID_TIM; |
| 1577 | tie->tim_len = 4; /* length */ |
| 1578 | tie->tim_count = 0; /* DTIM count */ |
| 1579 | tie->tim_period = ic->ic_dtim_period; /* DTIM period */ |
| 1580 | tie->tim_bitctl = 0; /* bitmap control */ |
| 1581 | tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ |
| 1582 | frm += sizeof(struct ieee80211_tim_ie); |
| 1583 | bo->bo_tim_len = 1; |
| 1584 | } |
| 1585 | bo->bo_trailer = frm; |
| 1586 | if (ic->ic_flags & IEEE80211_F_WME) { |
| 1587 | bo->bo_wme = frm; |
| 1588 | frm = ieee80211_add_wme_param(frm, &ic->ic_wme); |
| 1589 | ic->ic_flags &= ~IEEE80211_F_WMEUPDATE; |
| 1590 | } |
| 1591 | if (ic->ic_flags & IEEE80211_F_WPA) |
| 1592 | frm = ieee80211_add_wpa(frm, ic); |
| 1593 | if (ic->ic_curmode == IEEE80211_MODE_11G) { |
| 1594 | bo->bo_erp = frm; |
| 1595 | frm = ieee80211_add_erp(frm, ic); |
| 1596 | } |
| 1597 | efrm = ieee80211_add_xrates(frm, rs); |
| 1598 | bo->bo_trailer_len = efrm - bo->bo_trailer; |
| 1599 | m->m_pkthdr.len = m->m_len = efrm - mtod(m, uint8_t *); |
| 1600 | KKASSERT(m->m_len <= pktlen); |
| 1601 | |
| 1602 | M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT); |
| 1603 | KASSERT(m != NULL, ("no space for 802.11 header?")); |
| 1604 | wh = mtod(m, struct ieee80211_frame *); |
| 1605 | wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | |
| 1606 | IEEE80211_FC0_SUBTYPE_BEACON; |
| 1607 | wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; |
| 1608 | *(uint16_t *)wh->i_dur = 0; |
| 1609 | IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); |
| 1610 | IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); |
| 1611 | IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); |
| 1612 | *(uint16_t *)wh->i_seq = 0; |
| 1613 | |
| 1614 | return m; |
| 1615 | } |
| 1616 | |
| 1617 | /* |
| 1618 | * Update the dynamic parts of a beacon frame based on the current state. |
| 1619 | */ |
| 1620 | int |
| 1621 | ieee80211_beacon_update(struct ieee80211com *ic, struct ieee80211_node *ni, |
| 1622 | struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) |
| 1623 | { |
| 1624 | int len_changed = 0; |
| 1625 | uint16_t capinfo; |
| 1626 | |
| 1627 | ASSERT_SERIALIZED(ic->ic_ifp->if_serializer); |
| 1628 | |
| 1629 | /* XXX faster to recalculate entirely or just changes? */ |
| 1630 | capinfo = getcapinfo(ic, ni->ni_chan); |
| 1631 | *bo->bo_caps = htole16(capinfo); |
| 1632 | |
| 1633 | if (ic->ic_flags & IEEE80211_F_WME) { |
| 1634 | struct ieee80211_wme_state *wme = &ic->ic_wme; |
| 1635 | |
| 1636 | /* |
| 1637 | * Check for agressive mode change. When there is |
| 1638 | * significant high priority traffic in the BSS |
| 1639 | * throttle back BE traffic by using conservative |
| 1640 | * parameters. Otherwise BE uses agressive params |
| 1641 | * to optimize performance of legacy/non-QoS traffic. |
| 1642 | */ |
| 1643 | if (wme->wme_flags & WME_F_AGGRMODE) { |
| 1644 | if (wme->wme_hipri_traffic > |
| 1645 | wme->wme_hipri_switch_thresh) { |
| 1646 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, |
| 1647 | "%s: traffic %u, disable aggressive mode\n", |
| 1648 | __func__, wme->wme_hipri_traffic); |
| 1649 | wme->wme_flags &= ~WME_F_AGGRMODE; |
| 1650 | ieee80211_wme_updateparams(ic); |
| 1651 | wme->wme_hipri_traffic = |
| 1652 | wme->wme_hipri_switch_hysteresis; |
| 1653 | } else |
| 1654 | wme->wme_hipri_traffic = 0; |
| 1655 | } else { |
| 1656 | if (wme->wme_hipri_traffic <= |
| 1657 | wme->wme_hipri_switch_thresh) { |
| 1658 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, |
| 1659 | "%s: traffic %u, enable aggressive mode\n", |
| 1660 | __func__, wme->wme_hipri_traffic); |
| 1661 | wme->wme_flags |= WME_F_AGGRMODE; |
| 1662 | ieee80211_wme_updateparams(ic); |
| 1663 | wme->wme_hipri_traffic = 0; |
| 1664 | } else |
| 1665 | wme->wme_hipri_traffic = |
| 1666 | wme->wme_hipri_switch_hysteresis; |
| 1667 | } |
| 1668 | if (ic->ic_flags & IEEE80211_F_WMEUPDATE) { |
| 1669 | (void) ieee80211_add_wme_param(bo->bo_wme, wme); |
| 1670 | ic->ic_flags &= ~IEEE80211_F_WMEUPDATE; |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* NB: no IBSS support*/ |
| 1675 | struct ieee80211_tim_ie *tie = |
| 1676 | (struct ieee80211_tim_ie *) bo->bo_tim; |
| 1677 | if (ic->ic_flags & IEEE80211_F_TIMUPDATE) { |
| 1678 | u_int timlen, timoff, i; |
| 1679 | /* |
| 1680 | * ATIM/DTIM needs updating. If it fits in the |
| 1681 | * current space allocated then just copy in the |
| 1682 | * new bits. Otherwise we need to move any trailing |
| 1683 | * data to make room. Note that we know there is |
| 1684 | * contiguous space because ieee80211_beacon_allocate |
| 1685 | * insures there is space in the mbuf to write a |
| 1686 | * maximal-size virtual bitmap (based on ic_max_aid). |
| 1687 | */ |
| 1688 | /* |
| 1689 | * Calculate the bitmap size and offset, copy any |
| 1690 | * trailer out of the way, and then copy in the |
| 1691 | * new bitmap and update the information element. |
| 1692 | * Note that the tim bitmap must contain at least |
| 1693 | * one byte and any offset must be even. |
| 1694 | */ |
| 1695 | if (ic->ic_ps_pending != 0) { |
| 1696 | timoff = 128; /* impossibly large */ |
| 1697 | for (i = 0; i < ic->ic_tim_len; i++) |
| 1698 | if (ic->ic_tim_bitmap[i]) { |
| 1699 | timoff = i &~ 1; |
| 1700 | break; |
| 1701 | } |
| 1702 | KASSERT(timoff != 128, ("tim bitmap empty!")); |
| 1703 | for (i = ic->ic_tim_len-1; i >= timoff; i--) |
| 1704 | if (ic->ic_tim_bitmap[i]) |
| 1705 | break; |
| 1706 | timlen = 1 + (i - timoff); |
| 1707 | } else { |
| 1708 | timoff = 0; |
| 1709 | timlen = 1; |
| 1710 | } |
| 1711 | if (timlen != bo->bo_tim_len) { |
| 1712 | /* copy up/down trailer */ |
| 1713 | int adjust = tie->tim_bitmap+timlen |
| 1714 | - bo->bo_trailer; |
| 1715 | ovbcopy(bo->bo_trailer, bo->bo_trailer+adjust, |
| 1716 | bo->bo_trailer_len); |
| 1717 | bo->bo_trailer += adjust; |
| 1718 | bo->bo_wme += adjust; |
| 1719 | bo->bo_erp += adjust; |
| 1720 | bo->bo_tim_len = timlen; |
| 1721 | |
| 1722 | /* update information element */ |
| 1723 | tie->tim_len = 3 + timlen; |
| 1724 | tie->tim_bitctl = timoff; |
| 1725 | len_changed = 1; |
| 1726 | } |
| 1727 | memcpy(tie->tim_bitmap, ic->ic_tim_bitmap + timoff, |
| 1728 | bo->bo_tim_len); |
| 1729 | |
| 1730 | ic->ic_flags &= ~IEEE80211_F_TIMUPDATE; |
| 1731 | |
| 1732 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, |
| 1733 | "%s: TIM updated, pending %u, off %u, len %u\n", |
| 1734 | __func__, ic->ic_ps_pending, timoff, timlen); |
| 1735 | } |
| 1736 | /* count down DTIM period */ |
| 1737 | if (tie->tim_count == 0) |
| 1738 | tie->tim_count = tie->tim_period - 1; |
| 1739 | else |
| 1740 | tie->tim_count--; |
| 1741 | /* update state for buffered multicast frames on DTIM */ |
| 1742 | if (mcast && tie->tim_count == 0) |
| 1743 | tie->tim_bitctl |= 1; |
| 1744 | else |
| 1745 | tie->tim_bitctl &= ~1; |
| 1746 | if (ic->ic_flags_ext & IEEE80211_FEXT_ERPUPDATE) { |
| 1747 | /* |
| 1748 | * ERP element needs updating. |
| 1749 | */ |
| 1750 | (void) ieee80211_add_erp(bo->bo_erp, ic); |
| 1751 | ic->ic_flags_ext &= ~IEEE80211_FEXT_ERPUPDATE; |
| 1752 | } |
| 1753 | } |
| 1754 | |
| 1755 | return len_changed; |
| 1756 | } |
| 1757 | |
| 1758 | /* |
| 1759 | * Save an outbound packet for a node in power-save sleep state. |
| 1760 | * The new packet is placed on the node's saved queue, and the TIM |
| 1761 | * is changed, if necessary. |
| 1762 | */ |
| 1763 | void |
| 1764 | ieee80211_pwrsave(struct ieee80211com *ic, struct ieee80211_node *ni, |
| 1765 | struct mbuf *m) |
| 1766 | { |
| 1767 | int qlen, age; |
| 1768 | |
| 1769 | ASSERT_SERIALIZED(ic->ic_ifp->if_serializer); |
| 1770 | |
| 1771 | if (IF_QFULL(&ni->ni_savedq)) { |
| 1772 | IF_DROP(&ni->ni_savedq); |
| 1773 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, |
| 1774 | "[%6D] pwr save q overflow, drops %d (size %d)\n", |
| 1775 | ni->ni_macaddr, ":", |
| 1776 | ni->ni_savedq.ifq_drops, IEEE80211_PS_MAX_QUEUE); |
| 1777 | #ifdef IEEE80211_DEBUG |
| 1778 | if (ieee80211_msg_dumppkts(ic)) |
| 1779 | ieee80211_dump_pkt(mtod(m, caddr_t), m->m_len, -1, -1); |
| 1780 | #endif |
| 1781 | m_freem(m); |
| 1782 | return; |
| 1783 | } |
| 1784 | /* |
| 1785 | * Tag the frame with it's expiry time and insert |
| 1786 | * it in the queue. The aging interval is 4 times |
| 1787 | * the listen interval specified by the station. |
| 1788 | * Frames that sit around too long are reclaimed |
| 1789 | * using this information. |
| 1790 | */ |
| 1791 | /* TU -> secs. XXX handle overflow? */ |
| 1792 | age = IEEE80211_TU_TO_MS((ni->ni_intval * ic->ic_bintval) << 2) / 1000; |
| 1793 | _IEEE80211_NODE_SAVEQ_ENQUEUE(ni, m, qlen, age); |
| 1794 | |
| 1795 | IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, |
| 1796 | "[%6D] save frame with age %d, %u now queued\n", |
| 1797 | ni->ni_macaddr, ":", age, qlen); |
| 1798 | |
| 1799 | if (qlen == 1) |
| 1800 | ic->ic_set_tim(ni, 1); |
| 1801 | } |