ieee80211_output.c revision 153973
1116742Ssam/*- 2116904Ssam * Copyright (c) 2001 Atsushi Onoe 3139530Ssam * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 4116742Ssam * All rights reserved. 5116742Ssam * 6116742Ssam * Redistribution and use in source and binary forms, with or without 7116742Ssam * modification, are permitted provided that the following conditions 8116742Ssam * are met: 9116742Ssam * 1. Redistributions of source code must retain the above copyright 10116904Ssam * notice, this list of conditions and the following disclaimer. 11116904Ssam * 2. Redistributions in binary form must reproduce the above copyright 12116904Ssam * notice, this list of conditions and the following disclaimer in the 13116904Ssam * documentation and/or other materials provided with the distribution. 14116904Ssam * 3. The name of the author may not be used to endorse or promote products 15116904Ssam * derived from this software without specific prior written permission. 16116742Ssam * 17116742Ssam * Alternatively, this software may be distributed under the terms of the 18116742Ssam * GNU General Public License ("GPL") version 2 as published by the Free 19116742Ssam * Software Foundation. 20116742Ssam * 21116904Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22116904Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23116904Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24116904Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25116904Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26116904Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27116904Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28116904Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29116904Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30116904Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31116742Ssam */ 32116742Ssam 33116742Ssam#include <sys/cdefs.h> 34116742Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_output.c 153973 2006-01-02 16:57:20Z sam $"); 35116742Ssam 36116742Ssam#include "opt_inet.h" 37116742Ssam 38116742Ssam#include <sys/param.h> 39116742Ssam#include <sys/systm.h> 40116742Ssam#include <sys/mbuf.h> 41116742Ssam#include <sys/kernel.h> 42116742Ssam#include <sys/endian.h> 43116742Ssam 44138568Ssam#include <sys/socket.h> 45116742Ssam 46138568Ssam#include <net/bpf.h> 47138568Ssam#include <net/ethernet.h> 48116742Ssam#include <net/if.h> 49138568Ssam#include <net/if_llc.h> 50116742Ssam#include <net/if_media.h> 51138568Ssam#include <net/if_vlan_var.h> 52116742Ssam 53116742Ssam#include <net80211/ieee80211_var.h> 54116742Ssam 55116742Ssam#ifdef INET 56116742Ssam#include <netinet/in.h> 57116742Ssam#include <netinet/if_ether.h> 58138568Ssam#include <netinet/in_systm.h> 59138568Ssam#include <netinet/ip.h> 60116742Ssam#endif 61116742Ssam 62138568Ssam#ifdef IEEE80211_DEBUG 63119150Ssam/* 64138568Ssam * Decide if an outbound management frame should be 65138568Ssam * printed when debugging is enabled. This filters some 66138568Ssam * of the less interesting frames that come frequently 67138568Ssam * (e.g. beacons). 68138568Ssam */ 69138568Ssamstatic __inline int 70138568Ssamdoprint(struct ieee80211com *ic, int subtype) 71138568Ssam{ 72138568Ssam switch (subtype) { 73138568Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 74138568Ssam return (ic->ic_opmode == IEEE80211_M_IBSS); 75138568Ssam } 76138568Ssam return 1; 77138568Ssam} 78138568Ssam#endif 79138568Ssam 80138568Ssam/* 81148314Ssam * Set the direction field and address fields of an outgoing 82148314Ssam * non-QoS frame. Note this should be called early on in 83148314Ssam * constructing a frame as it sets i_fc[1]; other bits can 84148314Ssam * then be or'd in. 85148314Ssam */ 86148314Ssamstatic void 87148314Ssamieee80211_send_setup(struct ieee80211com *ic, 88148314Ssam struct ieee80211_node *ni, 89148314Ssam struct ieee80211_frame *wh, 90148314Ssam int type, 91148314Ssam const u_int8_t sa[IEEE80211_ADDR_LEN], 92148314Ssam const u_int8_t da[IEEE80211_ADDR_LEN], 93148314Ssam const u_int8_t bssid[IEEE80211_ADDR_LEN]) 94148314Ssam{ 95148314Ssam#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) 96148314Ssam 97148314Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; 98148314Ssam if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { 99148314Ssam switch (ic->ic_opmode) { 100148314Ssam case IEEE80211_M_STA: 101148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 102148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, bssid); 103148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, sa); 104148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, da); 105148314Ssam break; 106148314Ssam case IEEE80211_M_IBSS: 107148314Ssam case IEEE80211_M_AHDEMO: 108148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 109148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, da); 110148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, sa); 111148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 112148314Ssam break; 113148314Ssam case IEEE80211_M_HOSTAP: 114148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 115148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, da); 116148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, bssid); 117148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, sa); 118148314Ssam break; 119148314Ssam case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ 120148314Ssam break; 121148314Ssam } 122148314Ssam } else { 123148314Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 124148314Ssam IEEE80211_ADDR_COPY(wh->i_addr1, da); 125148314Ssam IEEE80211_ADDR_COPY(wh->i_addr2, sa); 126148314Ssam IEEE80211_ADDR_COPY(wh->i_addr3, bssid); 127148314Ssam } 128148314Ssam *(u_int16_t *)&wh->i_dur[0] = 0; 129148314Ssam /* NB: use non-QoS tid */ 130148314Ssam *(u_int16_t *)&wh->i_seq[0] = 131148314Ssam htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); 132148314Ssam ni->ni_txseqs[0]++; 133148314Ssam#undef WH4 134148314Ssam} 135148314Ssam 136148314Ssam/* 137119150Ssam * Send a management frame to the specified node. The node pointer 138119150Ssam * must have a reference as the pointer will be passed to the driver 139119150Ssam * and potentially held for a long time. If the frame is successfully 140119150Ssam * dispatched to the driver, then it is responsible for freeing the 141119150Ssam * reference (and potentially free'ing up any associated storage). 142119150Ssam */ 143119150Ssamstatic int 144138568Ssamieee80211_mgmt_output(struct ieee80211com *ic, struct ieee80211_node *ni, 145116742Ssam struct mbuf *m, int type) 146116742Ssam{ 147138568Ssam struct ifnet *ifp = ic->ic_ifp; 148116742Ssam struct ieee80211_frame *wh; 149116742Ssam 150119150Ssam KASSERT(ni != NULL, ("null node")); 151116742Ssam 152119150Ssam /* 153119150Ssam * Yech, hack alert! We want to pass the node down to the 154119150Ssam * driver's start routine. If we don't do so then the start 155119150Ssam * routine must immediately look it up again and that can 156119150Ssam * cause a lock order reversal if, for example, this frame 157119150Ssam * is being sent because the station is being timedout and 158119150Ssam * the frame being sent is a DEAUTH message. We could stick 159119150Ssam * this in an m_tag and tack that on to the mbuf. However 160119150Ssam * that's rather expensive to do for every frame so instead 161119150Ssam * we stuff it in the rcvif field since outbound frames do 162119150Ssam * not (presently) use this. 163119150Ssam */ 164116742Ssam M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 165116742Ssam if (m == NULL) 166116742Ssam return ENOMEM; 167119150Ssam KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null")); 168119150Ssam m->m_pkthdr.rcvif = (void *)ni; 169119150Ssam 170116742Ssam wh = mtod(m, struct ieee80211_frame *); 171148314Ssam ieee80211_send_setup(ic, ni, wh, 172148314Ssam IEEE80211_FC0_TYPE_MGT | type, 173148314Ssam ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid); 174138568Ssam if ((m->m_flags & M_LINK0) != 0 && ni->ni_challenge != NULL) { 175138568Ssam m->m_flags &= ~M_LINK0; 176138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, 177138568Ssam "[%s] encrypting frame (%s)\n", 178138568Ssam ether_sprintf(wh->i_addr1), __func__); 179138568Ssam wh->i_fc[1] |= IEEE80211_FC1_WEP; 180138568Ssam } 181116742Ssam#ifdef IEEE80211_DEBUG 182138568Ssam /* avoid printing too many frames */ 183138568Ssam if ((ieee80211_msg_debug(ic) && doprint(ic, type)) || 184138568Ssam ieee80211_msg_dumppkts(ic)) { 185138568Ssam printf("[%s] send %s on channel %u\n", 186138568Ssam ether_sprintf(wh->i_addr1), 187138568Ssam ieee80211_mgt_subtype_name[ 188138568Ssam (type & IEEE80211_FC0_SUBTYPE_MASK) >> 189138568Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 190148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan)); 191138568Ssam } 192116742Ssam#endif 193138568Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); 194116742Ssam IF_ENQUEUE(&ic->ic_mgtq, m); 195116742Ssam ifp->if_timer = 1; 196132712Srwatson if_start(ifp); 197116742Ssam return 0; 198116742Ssam} 199116742Ssam 200119150Ssam/* 201138568Ssam * Send a null data frame to the specified node. 202148582Ssam * 203148582Ssam * NB: the caller is assumed to have setup a node reference 204148582Ssam * for use; this is necessary to deal with a race condition 205148582Ssam * when probing for inactive stations. 206119150Ssam */ 207138568Ssamint 208148301Ssamieee80211_send_nulldata(struct ieee80211_node *ni) 209138568Ssam{ 210148301Ssam struct ieee80211com *ic = ni->ni_ic; 211138568Ssam struct ifnet *ifp = ic->ic_ifp; 212138568Ssam struct mbuf *m; 213138568Ssam struct ieee80211_frame *wh; 214138568Ssam 215151967Sandre MGETHDR(m, M_NOWAIT, MT_DATA); 216138568Ssam if (m == NULL) { 217138568Ssam /* XXX debug msg */ 218138568Ssam ic->ic_stats.is_tx_nobuf++; 219148582Ssam ieee80211_unref_node(&ni); 220138568Ssam return ENOMEM; 221138568Ssam } 222148582Ssam m->m_pkthdr.rcvif = (void *) ni; 223138568Ssam 224138568Ssam wh = mtod(m, struct ieee80211_frame *); 225148314Ssam ieee80211_send_setup(ic, ni, wh, 226148314Ssam IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 227148314Ssam ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid); 228148314Ssam /* NB: power management bit is never sent by an AP */ 229148314Ssam if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 230148314Ssam ic->ic_opmode != IEEE80211_M_HOSTAP) 231148314Ssam wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; 232138568Ssam m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame); 233138568Ssam 234138568Ssam IEEE80211_NODE_STAT(ni, tx_data); 235138568Ssam 236148314Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 237148314Ssam "[%s] send null data frame on channel %u, pwr mgt %s\n", 238148314Ssam ether_sprintf(ni->ni_macaddr), 239148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 240148314Ssam wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); 241148314Ssam 242138568Ssam IF_ENQUEUE(&ic->ic_mgtq, m); /* cheat */ 243138568Ssam if_start(ifp); 244138568Ssam 245138568Ssam return 0; 246138568Ssam} 247138568Ssam 248138568Ssam/* 249138568Ssam * Assign priority to a frame based on any vlan tag assigned 250138568Ssam * to the station and/or any Diffserv setting in an IP header. 251138568Ssam * Finally, if an ACM policy is setup (in station mode) it's 252138568Ssam * applied. 253138568Ssam */ 254138568Ssamint 255138568Ssamieee80211_classify(struct ieee80211com *ic, struct mbuf *m, struct ieee80211_node *ni) 256138568Ssam{ 257138568Ssam int v_wme_ac, d_wme_ac, ac; 258138568Ssam#ifdef INET 259138568Ssam struct ether_header *eh; 260138568Ssam#endif 261138568Ssam 262138568Ssam if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { 263138568Ssam ac = WME_AC_BE; 264138568Ssam goto done; 265138568Ssam } 266138568Ssam 267138568Ssam /* 268138568Ssam * If node has a vlan tag then all traffic 269138568Ssam * to it must have a matching tag. 270138568Ssam */ 271138568Ssam v_wme_ac = 0; 272138568Ssam if (ni->ni_vlan != 0) { 273138568Ssam struct m_tag *mtag = VLAN_OUTPUT_TAG(ic->ic_ifp, m); 274143716Ssam if (mtag == NULL) { 275138568Ssam IEEE80211_NODE_STAT(ni, tx_novlantag); 276138568Ssam return 1; 277138568Ssam } 278138568Ssam if (EVL_VLANOFTAG(VLAN_TAG_VALUE(mtag)) != 279138568Ssam EVL_VLANOFTAG(ni->ni_vlan)) { 280138568Ssam IEEE80211_NODE_STAT(ni, tx_vlanmismatch); 281138568Ssam return 1; 282138568Ssam } 283138568Ssam /* map vlan priority to AC */ 284138568Ssam switch (EVL_PRIOFTAG(ni->ni_vlan)) { 285138568Ssam case 1: 286138568Ssam case 2: 287138568Ssam v_wme_ac = WME_AC_BK; 288138568Ssam break; 289138568Ssam case 0: 290138568Ssam case 3: 291138568Ssam v_wme_ac = WME_AC_BE; 292138568Ssam break; 293138568Ssam case 4: 294138568Ssam case 5: 295138568Ssam v_wme_ac = WME_AC_VI; 296138568Ssam break; 297138568Ssam case 6: 298138568Ssam case 7: 299138568Ssam v_wme_ac = WME_AC_VO; 300138568Ssam break; 301138568Ssam } 302138568Ssam } 303138568Ssam 304138568Ssam#ifdef INET 305138568Ssam eh = mtod(m, struct ether_header *); 306138568Ssam if (eh->ether_type == htons(ETHERTYPE_IP)) { 307138568Ssam const struct ip *ip = (struct ip *) 308138568Ssam (mtod(m, u_int8_t *) + sizeof (*eh)); 309138568Ssam /* 310138568Ssam * IP frame, map the TOS field. 311138568Ssam */ 312138568Ssam switch (ip->ip_tos) { 313138568Ssam case 0x08: 314138568Ssam case 0x20: 315138568Ssam d_wme_ac = WME_AC_BK; /* background */ 316138568Ssam break; 317138568Ssam case 0x28: 318138568Ssam case 0xa0: 319138568Ssam d_wme_ac = WME_AC_VI; /* video */ 320138568Ssam break; 321138568Ssam case 0x30: /* voice */ 322138568Ssam case 0xe0: 323138568Ssam case 0x88: /* XXX UPSD */ 324138568Ssam case 0xb8: 325138568Ssam d_wme_ac = WME_AC_VO; 326138568Ssam break; 327138568Ssam default: 328138568Ssam d_wme_ac = WME_AC_BE; 329138568Ssam break; 330138568Ssam } 331138568Ssam } else { 332138568Ssam#endif /* INET */ 333138568Ssam d_wme_ac = WME_AC_BE; 334138568Ssam#ifdef INET 335138568Ssam } 336138568Ssam#endif 337138568Ssam /* 338138568Ssam * Use highest priority AC. 339138568Ssam */ 340138568Ssam if (v_wme_ac > d_wme_ac) 341138568Ssam ac = v_wme_ac; 342138568Ssam else 343138568Ssam ac = d_wme_ac; 344138568Ssam 345138568Ssam /* 346138568Ssam * Apply ACM policy. 347138568Ssam */ 348138568Ssam if (ic->ic_opmode == IEEE80211_M_STA) { 349138568Ssam static const int acmap[4] = { 350138568Ssam WME_AC_BK, /* WME_AC_BE */ 351138568Ssam WME_AC_BK, /* WME_AC_BK */ 352138568Ssam WME_AC_BE, /* WME_AC_VI */ 353138568Ssam WME_AC_VI, /* WME_AC_VO */ 354138568Ssam }; 355138568Ssam while (ac != WME_AC_BK && 356138568Ssam ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) 357138568Ssam ac = acmap[ac]; 358138568Ssam } 359138568Ssamdone: 360138568Ssam M_WME_SETAC(m, ac); 361138568Ssam return 0; 362138568Ssam} 363138568Ssam 364138568Ssam/* 365139527Ssam * Insure there is sufficient contiguous space to encapsulate the 366139527Ssam * 802.11 data frame. If room isn't already there, arrange for it. 367139527Ssam * Drivers and cipher modules assume we have done the necessary work 368139527Ssam * and fail rudely if they don't find the space they need. 369139527Ssam */ 370139527Ssamstatic struct mbuf * 371139527Ssamieee80211_mbuf_adjust(struct ieee80211com *ic, int hdrsize, 372139527Ssam struct ieee80211_key *key, struct mbuf *m) 373139527Ssam{ 374139527Ssam#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) 375139527Ssam int needed_space = hdrsize; 376139527Ssam 377139527Ssam if (key != NULL) { 378139527Ssam /* XXX belongs in crypto code? */ 379139527Ssam needed_space += key->wk_cipher->ic_header; 380139527Ssam /* XXX frags */ 381139527Ssam } 382139527Ssam /* 383139527Ssam * We know we are called just before stripping an Ethernet 384139527Ssam * header and prepending an LLC header. This means we know 385139527Ssam * there will be 386139527Ssam * sizeof(struct ether_header) - sizeof(struct llc) 387139527Ssam * bytes recovered to which we need additional space for the 388139527Ssam * 802.11 header and any crypto header. 389139527Ssam */ 390139527Ssam /* XXX check trailing space and copy instead? */ 391139527Ssam if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { 392139527Ssam struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); 393139527Ssam if (n == NULL) { 394139527Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 395139527Ssam "%s: cannot expand storage\n", __func__); 396139527Ssam ic->ic_stats.is_tx_nobuf++; 397139527Ssam m_freem(m); 398139527Ssam return NULL; 399139527Ssam } 400139527Ssam KASSERT(needed_space <= MHLEN, 401139527Ssam ("not enough room, need %u got %zu\n", needed_space, MHLEN)); 402139527Ssam /* 403139527Ssam * Setup new mbuf to have leading space to prepend the 404139527Ssam * 802.11 header and any crypto header bits that are 405139527Ssam * required (the latter are added when the driver calls 406139527Ssam * back to ieee80211_crypto_encap to do crypto encapsulation). 407139527Ssam */ 408139527Ssam /* NB: must be first 'cuz it clobbers m_data */ 409139527Ssam m_move_pkthdr(n, m); 410139527Ssam n->m_len = 0; /* NB: m_gethdr does not set */ 411139527Ssam n->m_data += needed_space; 412139527Ssam /* 413139527Ssam * Pull up Ethernet header to create the expected layout. 414139527Ssam * We could use m_pullup but that's overkill (i.e. we don't 415139527Ssam * need the actual data) and it cannot fail so do it inline 416139527Ssam * for speed. 417139527Ssam */ 418139527Ssam /* NB: struct ether_header is known to be contiguous */ 419139527Ssam n->m_len += sizeof(struct ether_header); 420139527Ssam m->m_len -= sizeof(struct ether_header); 421139527Ssam m->m_data += sizeof(struct ether_header); 422139527Ssam /* 423139527Ssam * Replace the head of the chain. 424139527Ssam */ 425139527Ssam n->m_next = m; 426139527Ssam m = n; 427139527Ssam } 428139527Ssam return m; 429139527Ssam#undef TO_BE_RECLAIMED 430139527Ssam} 431139527Ssam 432139527Ssam#define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none) 433139527Ssam/* 434139527Ssam * Return the transmit key to use in sending a unicast frame. 435139527Ssam * If a unicast key is set we use that. When no unicast key is set 436139527Ssam * we fall back to the default transmit key. 437138568Ssam */ 438138568Ssamstatic __inline struct ieee80211_key * 439139527Ssamieee80211_crypto_getucastkey(struct ieee80211com *ic, struct ieee80211_node *ni) 440138568Ssam{ 441139527Ssam if (KEY_UNDEFINED(ni->ni_ucastkey)) { 442138568Ssam if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE || 443138568Ssam KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey])) 444138568Ssam return NULL; 445138568Ssam return &ic->ic_nw_keys[ic->ic_def_txkey]; 446138568Ssam } else { 447138568Ssam return &ni->ni_ucastkey; 448138568Ssam } 449138568Ssam} 450138568Ssam 451138568Ssam/* 452139527Ssam * Return the transmit key to use in sending a multicast frame. 453139527Ssam * Multicast traffic always uses the group key which is installed as 454139527Ssam * the default tx key. 455139527Ssam */ 456139527Ssamstatic __inline struct ieee80211_key * 457139527Ssamieee80211_crypto_getmcastkey(struct ieee80211com *ic, struct ieee80211_node *ni) 458139527Ssam{ 459139527Ssam if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE || 460139527Ssam KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey])) 461139527Ssam return NULL; 462139527Ssam return &ic->ic_nw_keys[ic->ic_def_txkey]; 463139527Ssam} 464139527Ssam 465139527Ssam/* 466138568Ssam * Encapsulate an outbound data frame. The mbuf chain is updated. 467138568Ssam * If an error is encountered NULL is returned. The caller is required 468138568Ssam * to provide a node reference and pullup the ethernet header in the 469138568Ssam * first mbuf. 470138568Ssam */ 471116742Ssamstruct mbuf * 472138568Ssamieee80211_encap(struct ieee80211com *ic, struct mbuf *m, 473138568Ssam struct ieee80211_node *ni) 474116742Ssam{ 475116742Ssam struct ether_header eh; 476116742Ssam struct ieee80211_frame *wh; 477138568Ssam struct ieee80211_key *key; 478116742Ssam struct llc *llc; 479139527Ssam int hdrsize, datalen, addqos; 480116742Ssam 481138568Ssam KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); 482116742Ssam memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header)); 483116742Ssam 484138568Ssam /* 485138568Ssam * Insure space for additional headers. First identify 486138568Ssam * transmit key to use in calculating any buffer adjustments 487138568Ssam * required. This is also used below to do privacy 488138568Ssam * encapsulation work. Then calculate the 802.11 header 489138568Ssam * size and any padding required by the driver. 490138568Ssam * 491138568Ssam * Note key may be NULL if we fall back to the default 492138568Ssam * transmit key and that is not set. In that case the 493138568Ssam * buffer may not be expanded as needed by the cipher 494138568Ssam * routines, but they will/should discard it. 495138568Ssam */ 496138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) { 497139527Ssam if (ic->ic_opmode == IEEE80211_M_STA || 498139527Ssam !IEEE80211_IS_MULTICAST(eh.ether_dhost)) 499139527Ssam key = ieee80211_crypto_getucastkey(ic, ni); 500139527Ssam else 501139527Ssam key = ieee80211_crypto_getmcastkey(ic, ni); 502138568Ssam if (key == NULL && eh.ether_type != htons(ETHERTYPE_PAE)) { 503138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 504139527Ssam "[%s] no default transmit key (%s) deftxkey %u\n", 505139527Ssam ether_sprintf(eh.ether_dhost), __func__, 506139527Ssam ic->ic_def_txkey); 507139527Ssam ic->ic_stats.is_tx_nodefkey++; 508138568Ssam } 509138568Ssam } else 510138568Ssam key = NULL; 511138568Ssam /* XXX 4-address format */ 512139527Ssam /* 513139527Ssam * XXX Some ap's don't handle QoS-encapsulated EAPOL 514139527Ssam * frames so suppress use. This may be an issue if other 515139527Ssam * ap's require all data frames to be QoS-encapsulated 516139527Ssam * once negotiated in which case we'll need to make this 517139527Ssam * configurable. 518139527Ssam */ 519139527Ssam addqos = (ni->ni_flags & IEEE80211_NODE_QOS) && 520139527Ssam eh.ether_type != htons(ETHERTYPE_PAE); 521139527Ssam if (addqos) 522138568Ssam hdrsize = sizeof(struct ieee80211_qosframe); 523138568Ssam else 524138568Ssam hdrsize = sizeof(struct ieee80211_frame); 525138568Ssam if (ic->ic_flags & IEEE80211_F_DATAPAD) 526138568Ssam hdrsize = roundup(hdrsize, sizeof(u_int32_t)); 527138568Ssam m = ieee80211_mbuf_adjust(ic, hdrsize, key, m); 528138568Ssam if (m == NULL) { 529138568Ssam /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ 530127772Ssam goto bad; 531127772Ssam } 532116742Ssam 533138568Ssam /* NB: this could be optimized because of ieee80211_mbuf_adjust */ 534116742Ssam m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); 535116742Ssam llc = mtod(m, struct llc *); 536116742Ssam llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; 537116742Ssam llc->llc_control = LLC_UI; 538116742Ssam llc->llc_snap.org_code[0] = 0; 539116742Ssam llc->llc_snap.org_code[1] = 0; 540116742Ssam llc->llc_snap.org_code[2] = 0; 541116742Ssam llc->llc_snap.ether_type = eh.ether_type; 542138568Ssam datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ 543138568Ssam 544138568Ssam M_PREPEND(m, hdrsize, M_DONTWAIT); 545121180Ssam if (m == NULL) { 546138568Ssam ic->ic_stats.is_tx_nobuf++; 547119150Ssam goto bad; 548121180Ssam } 549116742Ssam wh = mtod(m, struct ieee80211_frame *); 550116742Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; 551116742Ssam *(u_int16_t *)wh->i_dur = 0; 552116742Ssam switch (ic->ic_opmode) { 553116742Ssam case IEEE80211_M_STA: 554116742Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; 555116742Ssam IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); 556116742Ssam IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 557116742Ssam IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); 558116742Ssam break; 559116742Ssam case IEEE80211_M_IBSS: 560116742Ssam case IEEE80211_M_AHDEMO: 561116742Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 562116742Ssam IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 563116742Ssam IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); 564140636Ssam /* 565140636Ssam * NB: always use the bssid from ic_bss as the 566140636Ssam * neighbor's may be stale after an ibss merge 567140636Ssam */ 568140636Ssam IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_bss->ni_bssid); 569116742Ssam break; 570116742Ssam case IEEE80211_M_HOSTAP: 571116742Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; 572116742Ssam IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); 573116742Ssam IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); 574116742Ssam IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); 575116742Ssam break; 576117817Ssam case IEEE80211_M_MONITOR: 577119150Ssam goto bad; 578116742Ssam } 579147789Ssam if (m->m_flags & M_MORE_DATA) 580147789Ssam wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; 581139527Ssam if (addqos) { 582138568Ssam struct ieee80211_qosframe *qwh = 583138568Ssam (struct ieee80211_qosframe *) wh; 584138568Ssam int ac, tid; 585138568Ssam 586138568Ssam ac = M_WME_GETAC(m); 587138568Ssam /* map from access class/queue to 11e header priorty value */ 588138568Ssam tid = WME_AC_TO_TID(ac); 589138568Ssam qwh->i_qos[0] = tid & IEEE80211_QOS_TID; 590138568Ssam if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) 591138568Ssam qwh->i_qos[0] |= 1 << IEEE80211_QOS_ACKPOLICY_S; 592138568Ssam qwh->i_qos[1] = 0; 593138568Ssam qwh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; 594138568Ssam 595138568Ssam *(u_int16_t *)wh->i_seq = 596138568Ssam htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT); 597138568Ssam ni->ni_txseqs[tid]++; 598138568Ssam } else { 599138568Ssam *(u_int16_t *)wh->i_seq = 600138568Ssam htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT); 601138568Ssam ni->ni_txseqs[0]++; 602138568Ssam } 603139527Ssam if (key != NULL) { 604139527Ssam /* 605139527Ssam * IEEE 802.1X: send EAPOL frames always in the clear. 606139527Ssam * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. 607139527Ssam */ 608139527Ssam if (eh.ether_type != htons(ETHERTYPE_PAE) || 609139527Ssam ((ic->ic_flags & IEEE80211_F_WPA) && 610141660Ssam (ic->ic_opmode == IEEE80211_M_STA ? 611141660Ssam !KEY_UNDEFINED(*key) : !KEY_UNDEFINED(ni->ni_ucastkey)))) { 612139527Ssam wh->i_fc[1] |= IEEE80211_FC1_WEP; 613139527Ssam /* XXX do fragmentation */ 614147045Ssam if (!ieee80211_crypto_enmic(ic, key, m, 0)) { 615139527Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT, 616139527Ssam "[%s] enmic failed, discard frame\n", 617139527Ssam ether_sprintf(eh.ether_dhost)); 618139527Ssam ic->ic_stats.is_crypto_enmicfail++; 619139527Ssam goto bad; 620139527Ssam } 621139527Ssam } 622139527Ssam } 623138568Ssam 624138568Ssam IEEE80211_NODE_STAT(ni, tx_data); 625138568Ssam IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); 626138568Ssam 627116742Ssam return m; 628119150Ssambad: 629119150Ssam if (m != NULL) 630119150Ssam m_freem(m); 631119150Ssam return NULL; 632116742Ssam} 633116742Ssam 634116742Ssam/* 635116742Ssam * Add a supported rates element id to a frame. 636116742Ssam */ 637138568Ssamstatic u_int8_t * 638116742Ssamieee80211_add_rates(u_int8_t *frm, const struct ieee80211_rateset *rs) 639116742Ssam{ 640116742Ssam int nrates; 641116742Ssam 642116742Ssam *frm++ = IEEE80211_ELEMID_RATES; 643116742Ssam nrates = rs->rs_nrates; 644116742Ssam if (nrates > IEEE80211_RATE_SIZE) 645116742Ssam nrates = IEEE80211_RATE_SIZE; 646116742Ssam *frm++ = nrates; 647116742Ssam memcpy(frm, rs->rs_rates, nrates); 648116742Ssam return frm + nrates; 649116742Ssam} 650116742Ssam 651116742Ssam/* 652116742Ssam * Add an extended supported rates element id to a frame. 653116742Ssam */ 654138568Ssamstatic u_int8_t * 655116742Ssamieee80211_add_xrates(u_int8_t *frm, const struct ieee80211_rateset *rs) 656116742Ssam{ 657116742Ssam /* 658116742Ssam * Add an extended supported rates element if operating in 11g mode. 659116742Ssam */ 660116742Ssam if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 661116742Ssam int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 662116742Ssam *frm++ = IEEE80211_ELEMID_XRATES; 663116742Ssam *frm++ = nrates; 664116742Ssam memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 665116742Ssam frm += nrates; 666116742Ssam } 667116742Ssam return frm; 668116742Ssam} 669116742Ssam 670116742Ssam/* 671116742Ssam * Add an ssid elemet to a frame. 672116742Ssam */ 673116742Ssamstatic u_int8_t * 674116742Ssamieee80211_add_ssid(u_int8_t *frm, const u_int8_t *ssid, u_int len) 675116742Ssam{ 676116742Ssam *frm++ = IEEE80211_ELEMID_SSID; 677116742Ssam *frm++ = len; 678116742Ssam memcpy(frm, ssid, len); 679116742Ssam return frm + len; 680116742Ssam} 681116742Ssam 682138568Ssam/* 683138568Ssam * Add an erp element to a frame. 684138568Ssam */ 685138568Ssamstatic u_int8_t * 686138568Ssamieee80211_add_erp(u_int8_t *frm, struct ieee80211com *ic) 687116742Ssam{ 688138568Ssam u_int8_t erp; 689116742Ssam 690138568Ssam *frm++ = IEEE80211_ELEMID_ERP; 691138568Ssam *frm++ = 1; 692138568Ssam erp = 0; 693138568Ssam if (ic->ic_nonerpsta != 0) 694138568Ssam erp |= IEEE80211_ERP_NON_ERP_PRESENT; 695138568Ssam if (ic->ic_flags & IEEE80211_F_USEPROT) 696138568Ssam erp |= IEEE80211_ERP_USE_PROTECTION; 697138568Ssam if (ic->ic_flags & IEEE80211_F_USEBARKER) 698138568Ssam erp |= IEEE80211_ERP_LONG_PREAMBLE; 699138568Ssam *frm++ = erp; 700138568Ssam return frm; 701138568Ssam} 702138568Ssam 703138568Ssamstatic u_int8_t * 704138568Ssamieee80211_setup_wpa_ie(struct ieee80211com *ic, u_int8_t *ie) 705138568Ssam{ 706138568Ssam#define WPA_OUI_BYTES 0x00, 0x50, 0xf2 707138568Ssam#define ADDSHORT(frm, v) do { \ 708138568Ssam frm[0] = (v) & 0xff; \ 709138568Ssam frm[1] = (v) >> 8; \ 710138568Ssam frm += 2; \ 711138568Ssam} while (0) 712138568Ssam#define ADDSELECTOR(frm, sel) do { \ 713138568Ssam memcpy(frm, sel, 4); \ 714138568Ssam frm += 4; \ 715138568Ssam} while (0) 716138568Ssam static const u_int8_t oui[4] = { WPA_OUI_BYTES, WPA_OUI_TYPE }; 717138568Ssam static const u_int8_t cipher_suite[][4] = { 718138568Ssam { WPA_OUI_BYTES, WPA_CSE_WEP40 }, /* NB: 40-bit */ 719138568Ssam { WPA_OUI_BYTES, WPA_CSE_TKIP }, 720138568Ssam { 0x00, 0x00, 0x00, 0x00 }, /* XXX WRAP */ 721138568Ssam { WPA_OUI_BYTES, WPA_CSE_CCMP }, 722138568Ssam { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */ 723138568Ssam { WPA_OUI_BYTES, WPA_CSE_NULL }, 724138568Ssam }; 725138568Ssam static const u_int8_t wep104_suite[4] = 726138568Ssam { WPA_OUI_BYTES, WPA_CSE_WEP104 }; 727138568Ssam static const u_int8_t key_mgt_unspec[4] = 728138568Ssam { WPA_OUI_BYTES, WPA_ASE_8021X_UNSPEC }; 729138568Ssam static const u_int8_t key_mgt_psk[4] = 730138568Ssam { WPA_OUI_BYTES, WPA_ASE_8021X_PSK }; 731138568Ssam const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn; 732138568Ssam u_int8_t *frm = ie; 733138568Ssam u_int8_t *selcnt; 734138568Ssam 735138568Ssam *frm++ = IEEE80211_ELEMID_VENDOR; 736138568Ssam *frm++ = 0; /* length filled in below */ 737138568Ssam memcpy(frm, oui, sizeof(oui)); /* WPA OUI */ 738138568Ssam frm += sizeof(oui); 739138568Ssam ADDSHORT(frm, WPA_VERSION); 740138568Ssam 741138568Ssam /* XXX filter out CKIP */ 742138568Ssam 743138568Ssam /* multicast cipher */ 744138568Ssam if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP && 745138568Ssam rsn->rsn_mcastkeylen >= 13) 746138568Ssam ADDSELECTOR(frm, wep104_suite); 747116742Ssam else 748138568Ssam ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]); 749138568Ssam 750138568Ssam /* unicast cipher list */ 751138568Ssam selcnt = frm; 752138568Ssam ADDSHORT(frm, 0); /* selector count */ 753138568Ssam if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) { 754138568Ssam selcnt[0]++; 755138568Ssam ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]); 756138568Ssam } 757138568Ssam if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) { 758138568Ssam selcnt[0]++; 759138568Ssam ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]); 760138568Ssam } 761138568Ssam 762138568Ssam /* authenticator selector list */ 763138568Ssam selcnt = frm; 764138568Ssam ADDSHORT(frm, 0); /* selector count */ 765138568Ssam if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) { 766138568Ssam selcnt[0]++; 767138568Ssam ADDSELECTOR(frm, key_mgt_unspec); 768138568Ssam } 769138568Ssam if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) { 770138568Ssam selcnt[0]++; 771138568Ssam ADDSELECTOR(frm, key_mgt_psk); 772138568Ssam } 773138568Ssam 774138568Ssam /* optional capabilities */ 775147066Ssam if (rsn->rsn_caps != 0 && rsn->rsn_caps != RSN_CAP_PREAUTH) 776138568Ssam ADDSHORT(frm, rsn->rsn_caps); 777138568Ssam 778138568Ssam /* calculate element length */ 779138568Ssam ie[1] = frm - ie - 2; 780138568Ssam KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa), 781138609Ssam ("WPA IE too big, %u > %zu", 782138568Ssam ie[1]+2, sizeof(struct ieee80211_ie_wpa))); 783138568Ssam return frm; 784138568Ssam#undef ADDSHORT 785138568Ssam#undef ADDSELECTOR 786138568Ssam#undef WPA_OUI_BYTES 787116742Ssam} 788116742Ssam 789138568Ssamstatic u_int8_t * 790138568Ssamieee80211_setup_rsn_ie(struct ieee80211com *ic, u_int8_t *ie) 791138568Ssam{ 792138568Ssam#define RSN_OUI_BYTES 0x00, 0x0f, 0xac 793138568Ssam#define ADDSHORT(frm, v) do { \ 794138568Ssam frm[0] = (v) & 0xff; \ 795138568Ssam frm[1] = (v) >> 8; \ 796138568Ssam frm += 2; \ 797138568Ssam} while (0) 798138568Ssam#define ADDSELECTOR(frm, sel) do { \ 799138568Ssam memcpy(frm, sel, 4); \ 800138568Ssam frm += 4; \ 801138568Ssam} while (0) 802138568Ssam static const u_int8_t cipher_suite[][4] = { 803138568Ssam { RSN_OUI_BYTES, RSN_CSE_WEP40 }, /* NB: 40-bit */ 804138568Ssam { RSN_OUI_BYTES, RSN_CSE_TKIP }, 805138568Ssam { RSN_OUI_BYTES, RSN_CSE_WRAP }, 806138568Ssam { RSN_OUI_BYTES, RSN_CSE_CCMP }, 807138568Ssam { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */ 808138568Ssam { RSN_OUI_BYTES, RSN_CSE_NULL }, 809138568Ssam }; 810138568Ssam static const u_int8_t wep104_suite[4] = 811138568Ssam { RSN_OUI_BYTES, RSN_CSE_WEP104 }; 812138568Ssam static const u_int8_t key_mgt_unspec[4] = 813138568Ssam { RSN_OUI_BYTES, RSN_ASE_8021X_UNSPEC }; 814138568Ssam static const u_int8_t key_mgt_psk[4] = 815138568Ssam { RSN_OUI_BYTES, RSN_ASE_8021X_PSK }; 816138568Ssam const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn; 817138568Ssam u_int8_t *frm = ie; 818138568Ssam u_int8_t *selcnt; 819138568Ssam 820138568Ssam *frm++ = IEEE80211_ELEMID_RSN; 821138568Ssam *frm++ = 0; /* length filled in below */ 822138568Ssam ADDSHORT(frm, RSN_VERSION); 823138568Ssam 824138568Ssam /* XXX filter out CKIP */ 825138568Ssam 826138568Ssam /* multicast cipher */ 827138568Ssam if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP && 828138568Ssam rsn->rsn_mcastkeylen >= 13) 829138568Ssam ADDSELECTOR(frm, wep104_suite); 830138568Ssam else 831138568Ssam ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]); 832138568Ssam 833138568Ssam /* unicast cipher list */ 834138568Ssam selcnt = frm; 835138568Ssam ADDSHORT(frm, 0); /* selector count */ 836138568Ssam if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) { 837138568Ssam selcnt[0]++; 838138568Ssam ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]); 839138568Ssam } 840138568Ssam if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) { 841138568Ssam selcnt[0]++; 842138568Ssam ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]); 843138568Ssam } 844138568Ssam 845138568Ssam /* authenticator selector list */ 846138568Ssam selcnt = frm; 847138568Ssam ADDSHORT(frm, 0); /* selector count */ 848138568Ssam if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) { 849138568Ssam selcnt[0]++; 850138568Ssam ADDSELECTOR(frm, key_mgt_unspec); 851138568Ssam } 852138568Ssam if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) { 853138568Ssam selcnt[0]++; 854138568Ssam ADDSELECTOR(frm, key_mgt_psk); 855138568Ssam } 856138568Ssam 857138568Ssam /* optional capabilities */ 858147066Ssam ADDSHORT(frm, rsn->rsn_caps); 859138568Ssam /* XXX PMKID */ 860138568Ssam 861138568Ssam /* calculate element length */ 862138568Ssam ie[1] = frm - ie - 2; 863138568Ssam KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa), 864138609Ssam ("RSN IE too big, %u > %zu", 865138568Ssam ie[1]+2, sizeof(struct ieee80211_ie_wpa))); 866138568Ssam return frm; 867138568Ssam#undef ADDSELECTOR 868138568Ssam#undef ADDSHORT 869138568Ssam#undef RSN_OUI_BYTES 870138568Ssam} 871138568Ssam 872119150Ssam/* 873138568Ssam * Add a WPA/RSN element to a frame. 874138568Ssam */ 875138568Ssamstatic u_int8_t * 876138568Ssamieee80211_add_wpa(u_int8_t *frm, struct ieee80211com *ic) 877138568Ssam{ 878138568Ssam 879138568Ssam KASSERT(ic->ic_flags & IEEE80211_F_WPA, ("no WPA/RSN!")); 880138568Ssam if (ic->ic_flags & IEEE80211_F_WPA2) 881138568Ssam frm = ieee80211_setup_rsn_ie(ic, frm); 882138568Ssam if (ic->ic_flags & IEEE80211_F_WPA1) 883138568Ssam frm = ieee80211_setup_wpa_ie(ic, frm); 884138568Ssam return frm; 885138568Ssam} 886138568Ssam 887138568Ssam#define WME_OUI_BYTES 0x00, 0x50, 0xf2 888138568Ssam/* 889138568Ssam * Add a WME information element to a frame. 890138568Ssam */ 891138568Ssamstatic u_int8_t * 892138568Ssamieee80211_add_wme_info(u_int8_t *frm, struct ieee80211_wme_state *wme) 893138568Ssam{ 894138568Ssam static const struct ieee80211_wme_info info = { 895138568Ssam .wme_id = IEEE80211_ELEMID_VENDOR, 896138568Ssam .wme_len = sizeof(struct ieee80211_wme_info) - 2, 897138568Ssam .wme_oui = { WME_OUI_BYTES }, 898138568Ssam .wme_type = WME_OUI_TYPE, 899138568Ssam .wme_subtype = WME_INFO_OUI_SUBTYPE, 900138568Ssam .wme_version = WME_VERSION, 901138568Ssam .wme_info = 0, 902138568Ssam }; 903138568Ssam memcpy(frm, &info, sizeof(info)); 904138568Ssam return frm + sizeof(info); 905138568Ssam} 906138568Ssam 907138568Ssam/* 908138568Ssam * Add a WME parameters element to a frame. 909138568Ssam */ 910138568Ssamstatic u_int8_t * 911138568Ssamieee80211_add_wme_param(u_int8_t *frm, struct ieee80211_wme_state *wme) 912138568Ssam{ 913138568Ssam#define SM(_v, _f) (((_v) << _f##_S) & _f) 914138568Ssam#define ADDSHORT(frm, v) do { \ 915138568Ssam frm[0] = (v) & 0xff; \ 916138568Ssam frm[1] = (v) >> 8; \ 917138568Ssam frm += 2; \ 918138568Ssam} while (0) 919138568Ssam /* NB: this works 'cuz a param has an info at the front */ 920138568Ssam static const struct ieee80211_wme_info param = { 921138568Ssam .wme_id = IEEE80211_ELEMID_VENDOR, 922138568Ssam .wme_len = sizeof(struct ieee80211_wme_param) - 2, 923138568Ssam .wme_oui = { WME_OUI_BYTES }, 924138568Ssam .wme_type = WME_OUI_TYPE, 925138568Ssam .wme_subtype = WME_PARAM_OUI_SUBTYPE, 926138568Ssam .wme_version = WME_VERSION, 927138568Ssam }; 928138568Ssam int i; 929138568Ssam 930138568Ssam memcpy(frm, ¶m, sizeof(param)); 931138568Ssam frm += __offsetof(struct ieee80211_wme_info, wme_info); 932138568Ssam *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ 933138568Ssam *frm++ = 0; /* reserved field */ 934138568Ssam for (i = 0; i < WME_NUM_AC; i++) { 935138568Ssam const struct wmeParams *ac = 936138568Ssam &wme->wme_bssChanParams.cap_wmeParams[i]; 937138568Ssam *frm++ = SM(i, WME_PARAM_ACI) 938138568Ssam | SM(ac->wmep_acm, WME_PARAM_ACM) 939138568Ssam | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) 940138568Ssam ; 941138568Ssam *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) 942138568Ssam | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) 943138568Ssam ; 944138568Ssam ADDSHORT(frm, ac->wmep_txopLimit); 945138568Ssam } 946138568Ssam return frm; 947138568Ssam#undef SM 948138568Ssam#undef ADDSHORT 949138568Ssam} 950138568Ssam#undef WME_OUI_BYTES 951138568Ssam 952138568Ssam/* 953148315Ssam * Send a probe request frame with the specified ssid 954148315Ssam * and any optional information element data. 955148315Ssam */ 956148315Ssamint 957148315Ssamieee80211_send_probereq(struct ieee80211_node *ni, 958148315Ssam const u_int8_t sa[IEEE80211_ADDR_LEN], 959148315Ssam const u_int8_t da[IEEE80211_ADDR_LEN], 960148315Ssam const u_int8_t bssid[IEEE80211_ADDR_LEN], 961148315Ssam const u_int8_t *ssid, size_t ssidlen, 962148315Ssam const void *optie, size_t optielen) 963148315Ssam{ 964148315Ssam struct ieee80211com *ic = ni->ni_ic; 965148315Ssam enum ieee80211_phymode mode; 966148315Ssam struct ieee80211_frame *wh; 967148315Ssam struct mbuf *m; 968148315Ssam u_int8_t *frm; 969148315Ssam 970148315Ssam /* 971148315Ssam * Hold a reference on the node so it doesn't go away until after 972148315Ssam * the xmit is complete all the way in the driver. On error we 973148315Ssam * will remove our reference. 974148315Ssam */ 975148315Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 976148315Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 977148315Ssam __func__, __LINE__, 978148315Ssam ni, ether_sprintf(ni->ni_macaddr), 979148315Ssam ieee80211_node_refcnt(ni)+1); 980148315Ssam ieee80211_ref_node(ni); 981148315Ssam 982148315Ssam /* 983148315Ssam * prreq frame format 984148315Ssam * [tlv] ssid 985148315Ssam * [tlv] supported rates 986148315Ssam * [tlv] extended supported rates 987148315Ssam * [tlv] user-specified ie's 988148315Ssam */ 989148315Ssam m = ieee80211_getmgtframe(&frm, 990148315Ssam 2 + IEEE80211_NWID_LEN 991148315Ssam + 2 + IEEE80211_RATE_SIZE 992148315Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 993148315Ssam + (optie != NULL ? optielen : 0) 994148315Ssam ); 995148315Ssam if (m == NULL) { 996148315Ssam ic->ic_stats.is_tx_nobuf++; 997148315Ssam ieee80211_free_node(ni); 998148315Ssam return ENOMEM; 999148315Ssam } 1000148315Ssam 1001148315Ssam frm = ieee80211_add_ssid(frm, ssid, ssidlen); 1002148936Ssam mode = ieee80211_chan2mode(ic, ic->ic_curchan); 1003148315Ssam frm = ieee80211_add_rates(frm, &ic->ic_sup_rates[mode]); 1004148315Ssam frm = ieee80211_add_xrates(frm, &ic->ic_sup_rates[mode]); 1005148315Ssam 1006148315Ssam if (optie != NULL) { 1007148315Ssam memcpy(frm, optie, optielen); 1008148315Ssam frm += optielen; 1009148315Ssam } 1010148315Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 1011148315Ssam 1012148315Ssam M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 1013148315Ssam if (m == NULL) 1014148315Ssam return ENOMEM; 1015148315Ssam KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null")); 1016148315Ssam m->m_pkthdr.rcvif = (void *)ni; 1017148315Ssam 1018148315Ssam wh = mtod(m, struct ieee80211_frame *); 1019148315Ssam ieee80211_send_setup(ic, ni, wh, 1020148315Ssam IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, 1021148315Ssam sa, da, bssid); 1022148315Ssam /* XXX power management? */ 1023148315Ssam 1024148315Ssam IEEE80211_NODE_STAT(ni, tx_probereq); 1025148315Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); 1026148315Ssam 1027148315Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 1028148315Ssam "[%s] send probe req on channel %u\n", 1029148315Ssam ether_sprintf(wh->i_addr1), 1030148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan)); 1031148315Ssam 1032148315Ssam IF_ENQUEUE(&ic->ic_mgtq, m); 1033148315Ssam if_start(ic->ic_ifp); 1034148315Ssam return 0; 1035148315Ssam} 1036148315Ssam 1037148315Ssam/* 1038119150Ssam * Send a management frame. The node is for the destination (or ic_bss 1039119150Ssam * when in station mode). Nodes other than ic_bss have their reference 1040119150Ssam * count bumped to reflect our use for an indeterminant time. 1041119150Ssam */ 1042116742Ssamint 1043116742Ssamieee80211_send_mgmt(struct ieee80211com *ic, struct ieee80211_node *ni, 1044116742Ssam int type, int arg) 1045116742Ssam{ 1046121180Ssam#define senderr(_x, _v) do { ic->ic_stats._v++; ret = _x; goto bad; } while (0) 1047116742Ssam struct mbuf *m; 1048116742Ssam u_int8_t *frm; 1049116742Ssam u_int16_t capinfo; 1050138568Ssam int has_challenge, is_shared_key, ret, timer, status; 1051116742Ssam 1052119150Ssam KASSERT(ni != NULL, ("null node")); 1053119150Ssam 1054119150Ssam /* 1055119150Ssam * Hold a reference on the node so it doesn't go away until after 1056119150Ssam * the xmit is complete all the way in the driver. On error we 1057119150Ssam * will remove our reference. 1058119150Ssam */ 1059138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 1060140766Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1061138568Ssam __func__, __LINE__, 1062140766Ssam ni, ether_sprintf(ni->ni_macaddr), 1063140766Ssam ieee80211_node_refcnt(ni)+1); 1064138568Ssam ieee80211_ref_node(ni); 1065138568Ssam 1066116742Ssam timer = 0; 1067116742Ssam switch (type) { 1068116742Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1069116742Ssam /* 1070116742Ssam * probe response frame format 1071116742Ssam * [8] time stamp 1072116742Ssam * [2] beacon interval 1073116742Ssam * [2] cabability information 1074116742Ssam * [tlv] ssid 1075116742Ssam * [tlv] supported rates 1076121178Ssam * [tlv] parameter set (FH/DS) 1077116742Ssam * [tlv] parameter set (IBSS) 1078138568Ssam * [tlv] extended rate phy (ERP) 1079116742Ssam * [tlv] extended supported rates 1080138568Ssam * [tlv] WPA 1081144136Ssam * [tlv] WME (optional) 1082116742Ssam */ 1083138568Ssam m = ieee80211_getmgtframe(&frm, 1084138568Ssam 8 1085138568Ssam + sizeof(u_int16_t) 1086138568Ssam + sizeof(u_int16_t) 1087138568Ssam + 2 + IEEE80211_NWID_LEN 1088116742Ssam + 2 + IEEE80211_RATE_SIZE 1089138568Ssam + 7 /* max(7,3) */ 1090116742Ssam + 6 1091138568Ssam + 3 1092138568Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1093138568Ssam /* XXX !WPA1+WPA2 fits w/o a cluster */ 1094138568Ssam + (ic->ic_flags & IEEE80211_F_WPA ? 1095138568Ssam 2*sizeof(struct ieee80211_ie_wpa) : 0) 1096144136Ssam + sizeof(struct ieee80211_wme_param) 1097138568Ssam ); 1098116742Ssam if (m == NULL) 1099138568Ssam senderr(ENOMEM, is_tx_nobuf); 1100116742Ssam 1101116742Ssam memset(frm, 0, 8); /* timestamp should be filled later */ 1102116742Ssam frm += 8; 1103116742Ssam *(u_int16_t *)frm = htole16(ic->ic_bss->ni_intval); 1104116742Ssam frm += 2; 1105116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) 1106116742Ssam capinfo = IEEE80211_CAPINFO_IBSS; 1107116742Ssam else 1108116742Ssam capinfo = IEEE80211_CAPINFO_ESS; 1109138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 1110116742Ssam capinfo |= IEEE80211_CAPINFO_PRIVACY; 1111120070Ssam if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1112148936Ssam IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 1113120070Ssam capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1114138568Ssam if (ic->ic_flags & IEEE80211_F_SHSLOT) 1115138568Ssam capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1116116742Ssam *(u_int16_t *)frm = htole16(capinfo); 1117116742Ssam frm += 2; 1118116742Ssam 1119116742Ssam frm = ieee80211_add_ssid(frm, ic->ic_bss->ni_essid, 1120116742Ssam ic->ic_bss->ni_esslen); 1121138568Ssam frm = ieee80211_add_rates(frm, &ni->ni_rates); 1122116742Ssam 1123121178Ssam if (ic->ic_phytype == IEEE80211_T_FH) { 1124121178Ssam *frm++ = IEEE80211_ELEMID_FHPARMS; 1125121178Ssam *frm++ = 5; 1126121178Ssam *frm++ = ni->ni_fhdwell & 0x00ff; 1127121178Ssam *frm++ = (ni->ni_fhdwell >> 8) & 0x00ff; 1128121178Ssam *frm++ = IEEE80211_FH_CHANSET( 1129148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan)); 1130121178Ssam *frm++ = IEEE80211_FH_CHANPAT( 1131148936Ssam ieee80211_chan2ieee(ic, ic->ic_curchan)); 1132121178Ssam *frm++ = ni->ni_fhindex; 1133121178Ssam } else { 1134121178Ssam *frm++ = IEEE80211_ELEMID_DSPARMS; 1135121178Ssam *frm++ = 1; 1136148936Ssam *frm++ = ieee80211_chan2ieee(ic, ic->ic_curchan); 1137121178Ssam } 1138121178Ssam 1139116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 1140116742Ssam *frm++ = IEEE80211_ELEMID_IBSSPARMS; 1141116742Ssam *frm++ = 2; 1142116742Ssam *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 1143116742Ssam } 1144138568Ssam if (ic->ic_flags & IEEE80211_F_WPA) 1145138568Ssam frm = ieee80211_add_wpa(frm, ic); 1146138568Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) 1147138568Ssam frm = ieee80211_add_erp(frm, ic); 1148138568Ssam frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1149144136Ssam if (ic->ic_flags & IEEE80211_F_WME) 1150144136Ssam frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 1151116742Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 1152116742Ssam break; 1153116742Ssam 1154116742Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 1155138568Ssam status = arg >> 16; 1156138568Ssam arg &= 0xffff; 1157138568Ssam has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || 1158138568Ssam arg == IEEE80211_AUTH_SHARED_RESPONSE) && 1159138568Ssam ni->ni_challenge != NULL); 1160138568Ssam 1161138568Ssam /* 1162138568Ssam * Deduce whether we're doing open authentication or 1163138568Ssam * shared key authentication. We do the latter if 1164138568Ssam * we're in the middle of a shared key authentication 1165138568Ssam * handshake or if we're initiating an authentication 1166138568Ssam * request and configured to use shared key. 1167138568Ssam */ 1168138568Ssam is_shared_key = has_challenge || 1169138568Ssam arg >= IEEE80211_AUTH_SHARED_RESPONSE || 1170138568Ssam (arg == IEEE80211_AUTH_SHARED_REQUEST && 1171138568Ssam ic->ic_bss->ni_authmode == IEEE80211_AUTH_SHARED); 1172138568Ssam 1173138568Ssam m = ieee80211_getmgtframe(&frm, 1174138568Ssam 3 * sizeof(u_int16_t) 1175138568Ssam + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? 1176138568Ssam sizeof(u_int16_t)+IEEE80211_CHALLENGE_LEN : 0) 1177138568Ssam ); 1178116742Ssam if (m == NULL) 1179138568Ssam senderr(ENOMEM, is_tx_nobuf); 1180138568Ssam 1181138568Ssam ((u_int16_t *)frm)[0] = 1182138568Ssam (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) 1183138568Ssam : htole16(IEEE80211_AUTH_ALG_OPEN); 1184116742Ssam ((u_int16_t *)frm)[1] = htole16(arg); /* sequence number */ 1185138568Ssam ((u_int16_t *)frm)[2] = htole16(status);/* status */ 1186138568Ssam 1187138568Ssam if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { 1188138568Ssam ((u_int16_t *)frm)[3] = 1189138568Ssam htole16((IEEE80211_CHALLENGE_LEN << 8) | 1190138568Ssam IEEE80211_ELEMID_CHALLENGE); 1191138568Ssam memcpy(&((u_int16_t *)frm)[4], ni->ni_challenge, 1192138568Ssam IEEE80211_CHALLENGE_LEN); 1193138568Ssam m->m_pkthdr.len = m->m_len = 1194138568Ssam 4 * sizeof(u_int16_t) + IEEE80211_CHALLENGE_LEN; 1195138568Ssam if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { 1196138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, 1197138568Ssam "[%s] request encrypt frame (%s)\n", 1198138568Ssam ether_sprintf(ni->ni_macaddr), __func__); 1199138568Ssam m->m_flags |= M_LINK0; /* WEP-encrypt, please */ 1200138568Ssam } 1201138568Ssam } else 1202138568Ssam m->m_pkthdr.len = m->m_len = 3 * sizeof(u_int16_t); 1203138568Ssam 1204138568Ssam /* XXX not right for shared key */ 1205138568Ssam if (status == IEEE80211_STATUS_SUCCESS) 1206138568Ssam IEEE80211_NODE_STAT(ni, tx_auth); 1207138568Ssam else 1208138568Ssam IEEE80211_NODE_STAT(ni, tx_auth_fail); 1209138568Ssam 1210116742Ssam if (ic->ic_opmode == IEEE80211_M_STA) 1211116742Ssam timer = IEEE80211_TRANS_WAIT; 1212116742Ssam break; 1213116742Ssam 1214116742Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 1215138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH, 1216138568Ssam "[%s] send station deauthenticate (reason %d)\n", 1217138568Ssam ether_sprintf(ni->ni_macaddr), arg); 1218138568Ssam m = ieee80211_getmgtframe(&frm, sizeof(u_int16_t)); 1219116742Ssam if (m == NULL) 1220138568Ssam senderr(ENOMEM, is_tx_nobuf); 1221138568Ssam *(u_int16_t *)frm = htole16(arg); /* reason */ 1222138568Ssam m->m_pkthdr.len = m->m_len = sizeof(u_int16_t); 1223138568Ssam 1224138568Ssam IEEE80211_NODE_STAT(ni, tx_deauth); 1225138568Ssam IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); 1226138568Ssam 1227148302Ssam ieee80211_node_unauthorize(ni); /* port closed */ 1228116742Ssam break; 1229116742Ssam 1230116742Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1231116742Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1232116742Ssam /* 1233116742Ssam * asreq frame format 1234116742Ssam * [2] capability information 1235116742Ssam * [2] listen interval 1236116742Ssam * [6*] current AP address (reassoc only) 1237116742Ssam * [tlv] ssid 1238116742Ssam * [tlv] supported rates 1239116742Ssam * [tlv] extended supported rates 1240138568Ssam * [tlv] WME 1241138568Ssam * [tlv] user-specified ie's 1242116742Ssam */ 1243138568Ssam m = ieee80211_getmgtframe(&frm, 1244138568Ssam sizeof(u_int16_t) 1245116742Ssam + sizeof(u_int16_t) 1246116742Ssam + IEEE80211_ADDR_LEN 1247138568Ssam + 2 + IEEE80211_NWID_LEN 1248116742Ssam + 2 + IEEE80211_RATE_SIZE 1249138568Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1250138568Ssam + sizeof(struct ieee80211_wme_info) 1251138568Ssam + (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0) 1252138568Ssam ); 1253116742Ssam if (m == NULL) 1254138568Ssam senderr(ENOMEM, is_tx_nobuf); 1255116742Ssam 1256116742Ssam capinfo = 0; 1257116742Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) 1258116742Ssam capinfo |= IEEE80211_CAPINFO_IBSS; 1259116742Ssam else /* IEEE80211_M_STA */ 1260116742Ssam capinfo |= IEEE80211_CAPINFO_ESS; 1261138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 1262116742Ssam capinfo |= IEEE80211_CAPINFO_PRIVACY; 1263120070Ssam /* 1264120070Ssam * NB: Some 11a AP's reject the request when 1265120070Ssam * short premable is set. 1266120070Ssam */ 1267120070Ssam if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1268148936Ssam IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 1269116742Ssam capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1270138568Ssam if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) && 1271138568Ssam (ic->ic_caps & IEEE80211_C_SHSLOT)) 1272116742Ssam capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1273116742Ssam *(u_int16_t *)frm = htole16(capinfo); 1274116742Ssam frm += 2; 1275116742Ssam 1276116742Ssam *(u_int16_t *)frm = htole16(ic->ic_lintval); 1277116742Ssam frm += 2; 1278116742Ssam 1279116742Ssam if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1280116742Ssam IEEE80211_ADDR_COPY(frm, ic->ic_bss->ni_bssid); 1281116742Ssam frm += IEEE80211_ADDR_LEN; 1282116742Ssam } 1283116742Ssam 1284116742Ssam frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); 1285116742Ssam frm = ieee80211_add_rates(frm, &ni->ni_rates); 1286116742Ssam frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1287138568Ssam if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL) 1288138568Ssam frm = ieee80211_add_wme_info(frm, &ic->ic_wme); 1289138568Ssam if (ic->ic_opt_ie != NULL) { 1290138568Ssam memcpy(frm, ic->ic_opt_ie, ic->ic_opt_ie_len); 1291138568Ssam frm += ic->ic_opt_ie_len; 1292138568Ssam } 1293116742Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 1294116742Ssam 1295116742Ssam timer = IEEE80211_TRANS_WAIT; 1296116742Ssam break; 1297116742Ssam 1298116742Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1299116742Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1300116742Ssam /* 1301116742Ssam * asreq frame format 1302116742Ssam * [2] capability information 1303116742Ssam * [2] status 1304116742Ssam * [2] association ID 1305116742Ssam * [tlv] supported rates 1306116742Ssam * [tlv] extended supported rates 1307138568Ssam * [tlv] WME (if enabled and STA enabled) 1308116742Ssam */ 1309138568Ssam m = ieee80211_getmgtframe(&frm, 1310138568Ssam sizeof(u_int16_t) 1311116742Ssam + sizeof(u_int16_t) 1312116742Ssam + sizeof(u_int16_t) 1313116742Ssam + 2 + IEEE80211_RATE_SIZE 1314138568Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1315138568Ssam + sizeof(struct ieee80211_wme_param) 1316138568Ssam ); 1317116742Ssam if (m == NULL) 1318138568Ssam senderr(ENOMEM, is_tx_nobuf); 1319116742Ssam 1320116742Ssam capinfo = IEEE80211_CAPINFO_ESS; 1321138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 1322116742Ssam capinfo |= IEEE80211_CAPINFO_PRIVACY; 1323120070Ssam if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1324148936Ssam IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) 1325120070Ssam capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1326138568Ssam if (ic->ic_flags & IEEE80211_F_SHSLOT) 1327138568Ssam capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1328116742Ssam *(u_int16_t *)frm = htole16(capinfo); 1329116742Ssam frm += 2; 1330116742Ssam 1331116742Ssam *(u_int16_t *)frm = htole16(arg); /* status */ 1332116742Ssam frm += 2; 1333116742Ssam 1334138568Ssam if (arg == IEEE80211_STATUS_SUCCESS) { 1335116742Ssam *(u_int16_t *)frm = htole16(ni->ni_associd); 1336138568Ssam IEEE80211_NODE_STAT(ni, tx_assoc); 1337138568Ssam } else 1338138568Ssam IEEE80211_NODE_STAT(ni, tx_assoc_fail); 1339116742Ssam frm += 2; 1340116742Ssam 1341119150Ssam frm = ieee80211_add_rates(frm, &ni->ni_rates); 1342119150Ssam frm = ieee80211_add_xrates(frm, &ni->ni_rates); 1343138568Ssam if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL) 1344138568Ssam frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 1345116742Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *); 1346116742Ssam break; 1347116742Ssam 1348116742Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: 1349138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC, 1350138568Ssam "[%s] send station disassociate (reason %d)\n", 1351138568Ssam ether_sprintf(ni->ni_macaddr), arg); 1352138568Ssam m = ieee80211_getmgtframe(&frm, sizeof(u_int16_t)); 1353116742Ssam if (m == NULL) 1354138568Ssam senderr(ENOMEM, is_tx_nobuf); 1355138568Ssam *(u_int16_t *)frm = htole16(arg); /* reason */ 1356138568Ssam m->m_pkthdr.len = m->m_len = sizeof(u_int16_t); 1357138568Ssam 1358138568Ssam IEEE80211_NODE_STAT(ni, tx_disassoc); 1359138568Ssam IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); 1360116742Ssam break; 1361116742Ssam 1362116742Ssam default: 1363138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, 1364138568Ssam "[%s] invalid mgmt frame type %u\n", 1365138568Ssam ether_sprintf(ni->ni_macaddr), type); 1366121180Ssam senderr(EINVAL, is_tx_unknownmgt); 1367119150Ssam /* NOTREACHED */ 1368116742Ssam } 1369116742Ssam 1370138568Ssam ret = ieee80211_mgmt_output(ic, ni, m, type); 1371119150Ssam if (ret == 0) { 1372119150Ssam if (timer) 1373119150Ssam ic->ic_mgt_timer = timer; 1374119150Ssam } else { 1375119150Ssambad: 1376138568Ssam ieee80211_free_node(ni); 1377119150Ssam } 1378116742Ssam return ret; 1379119150Ssam#undef senderr 1380116742Ssam} 1381138568Ssam 1382138568Ssam/* 1383138568Ssam * Allocate a beacon frame and fillin the appropriate bits. 1384138568Ssam */ 1385138568Ssamstruct mbuf * 1386138568Ssamieee80211_beacon_alloc(struct ieee80211com *ic, struct ieee80211_node *ni, 1387138568Ssam struct ieee80211_beacon_offsets *bo) 1388138568Ssam{ 1389138568Ssam struct ifnet *ifp = ic->ic_ifp; 1390138568Ssam struct ieee80211_frame *wh; 1391138568Ssam struct mbuf *m; 1392138568Ssam int pktlen; 1393138568Ssam u_int8_t *frm, *efrm; 1394138568Ssam u_int16_t capinfo; 1395138568Ssam struct ieee80211_rateset *rs; 1396138568Ssam 1397138568Ssam /* 1398138568Ssam * beacon frame format 1399138568Ssam * [8] time stamp 1400138568Ssam * [2] beacon interval 1401138568Ssam * [2] cabability information 1402138568Ssam * [tlv] ssid 1403138568Ssam * [tlv] supported rates 1404138568Ssam * [3] parameter set (DS) 1405138568Ssam * [tlv] parameter set (IBSS/TIM) 1406138568Ssam * [tlv] extended rate phy (ERP) 1407138568Ssam * [tlv] extended supported rates 1408138568Ssam * [tlv] WME parameters 1409138568Ssam * [tlv] WPA/RSN parameters 1410138568Ssam * XXX Vendor-specific OIDs (e.g. Atheros) 1411138568Ssam * NB: we allocate the max space required for the TIM bitmap. 1412138568Ssam */ 1413138568Ssam rs = &ni->ni_rates; 1414138568Ssam pktlen = 8 /* time stamp */ 1415138568Ssam + sizeof(u_int16_t) /* beacon interval */ 1416138568Ssam + sizeof(u_int16_t) /* capabilities */ 1417138568Ssam + 2 + ni->ni_esslen /* ssid */ 1418138568Ssam + 2 + IEEE80211_RATE_SIZE /* supported rates */ 1419138568Ssam + 2 + 1 /* DS parameters */ 1420138568Ssam + 2 + 4 + ic->ic_tim_len /* DTIM/IBSSPARMS */ 1421138568Ssam + 2 + 1 /* ERP */ 1422138568Ssam + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1423138568Ssam + (ic->ic_caps & IEEE80211_C_WME ? /* WME */ 1424138568Ssam sizeof(struct ieee80211_wme_param) : 0) 1425138568Ssam + (ic->ic_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 1426138568Ssam 2*sizeof(struct ieee80211_ie_wpa) : 0) 1427138568Ssam ; 1428138568Ssam m = ieee80211_getmgtframe(&frm, pktlen); 1429138568Ssam if (m == NULL) { 1430138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, 1431138568Ssam "%s: cannot get buf; size %u\n", __func__, pktlen); 1432138568Ssam ic->ic_stats.is_tx_nobuf++; 1433138568Ssam return NULL; 1434138568Ssam } 1435138568Ssam 1436138568Ssam memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ 1437138568Ssam frm += 8; 1438138568Ssam *(u_int16_t *)frm = htole16(ni->ni_intval); 1439138568Ssam frm += 2; 1440138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) 1441138568Ssam capinfo = IEEE80211_CAPINFO_IBSS; 1442138568Ssam else 1443138568Ssam capinfo = IEEE80211_CAPINFO_ESS; 1444138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 1445138568Ssam capinfo |= IEEE80211_CAPINFO_PRIVACY; 1446138568Ssam if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1447138568Ssam IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) 1448138568Ssam capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1449138568Ssam if (ic->ic_flags & IEEE80211_F_SHSLOT) 1450138568Ssam capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1451138568Ssam bo->bo_caps = (u_int16_t *)frm; 1452138568Ssam *(u_int16_t *)frm = htole16(capinfo); 1453138568Ssam frm += 2; 1454138568Ssam *frm++ = IEEE80211_ELEMID_SSID; 1455138568Ssam if ((ic->ic_flags & IEEE80211_F_HIDESSID) == 0) { 1456138568Ssam *frm++ = ni->ni_esslen; 1457138568Ssam memcpy(frm, ni->ni_essid, ni->ni_esslen); 1458138568Ssam frm += ni->ni_esslen; 1459138568Ssam } else 1460138568Ssam *frm++ = 0; 1461138568Ssam frm = ieee80211_add_rates(frm, rs); 1462138568Ssam if (ic->ic_curmode != IEEE80211_MODE_FH) { 1463138568Ssam *frm++ = IEEE80211_ELEMID_DSPARMS; 1464138568Ssam *frm++ = 1; 1465138568Ssam *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 1466138568Ssam } 1467138568Ssam bo->bo_tim = frm; 1468138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) { 1469138568Ssam *frm++ = IEEE80211_ELEMID_IBSSPARMS; 1470138568Ssam *frm++ = 2; 1471138568Ssam *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ 1472138568Ssam bo->bo_tim_len = 0; 1473138568Ssam } else { 1474138568Ssam struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; 1475138568Ssam 1476138568Ssam tie->tim_ie = IEEE80211_ELEMID_TIM; 1477138568Ssam tie->tim_len = 4; /* length */ 1478138568Ssam tie->tim_count = 0; /* DTIM count */ 1479138568Ssam tie->tim_period = ic->ic_dtim_period; /* DTIM period */ 1480138568Ssam tie->tim_bitctl = 0; /* bitmap control */ 1481138568Ssam tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ 1482138568Ssam frm += sizeof(struct ieee80211_tim_ie); 1483138568Ssam bo->bo_tim_len = 1; 1484138568Ssam } 1485138568Ssam bo->bo_trailer = frm; 1486138568Ssam if (ic->ic_flags & IEEE80211_F_WME) { 1487138568Ssam bo->bo_wme = frm; 1488138568Ssam frm = ieee80211_add_wme_param(frm, &ic->ic_wme); 1489140764Ssam ic->ic_flags &= ~IEEE80211_F_WMEUPDATE; 1490138568Ssam } 1491138568Ssam if (ic->ic_flags & IEEE80211_F_WPA) 1492138568Ssam frm = ieee80211_add_wpa(frm, ic); 1493153973Ssam if (ic->ic_curmode == IEEE80211_MODE_11G) { 1494153973Ssam bo->bo_erp = frm; 1495138568Ssam frm = ieee80211_add_erp(frm, ic); 1496153973Ssam } 1497138568Ssam efrm = ieee80211_add_xrates(frm, rs); 1498138568Ssam bo->bo_trailer_len = efrm - bo->bo_trailer; 1499138568Ssam m->m_pkthdr.len = m->m_len = efrm - mtod(m, u_int8_t *); 1500138568Ssam 1501138568Ssam M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 1502138568Ssam KASSERT(m != NULL, ("no space for 802.11 header?")); 1503138568Ssam wh = mtod(m, struct ieee80211_frame *); 1504138568Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 1505138568Ssam IEEE80211_FC0_SUBTYPE_BEACON; 1506138568Ssam wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1507138568Ssam *(u_int16_t *)wh->i_dur = 0; 1508138568Ssam IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 1509138568Ssam IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 1510138568Ssam IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); 1511138568Ssam *(u_int16_t *)wh->i_seq = 0; 1512138568Ssam 1513138568Ssam return m; 1514138568Ssam} 1515138568Ssam 1516138568Ssam/* 1517138568Ssam * Update the dynamic parts of a beacon frame based on the current state. 1518138568Ssam */ 1519138568Ssamint 1520138568Ssamieee80211_beacon_update(struct ieee80211com *ic, struct ieee80211_node *ni, 1521138568Ssam struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) 1522138568Ssam{ 1523138568Ssam int len_changed = 0; 1524138568Ssam u_int16_t capinfo; 1525138568Ssam 1526138568Ssam IEEE80211_BEACON_LOCK(ic); 1527138568Ssam /* XXX faster to recalculate entirely or just changes? */ 1528138568Ssam if (ic->ic_opmode == IEEE80211_M_IBSS) 1529138568Ssam capinfo = IEEE80211_CAPINFO_IBSS; 1530138568Ssam else 1531138568Ssam capinfo = IEEE80211_CAPINFO_ESS; 1532138568Ssam if (ic->ic_flags & IEEE80211_F_PRIVACY) 1533138568Ssam capinfo |= IEEE80211_CAPINFO_PRIVACY; 1534138568Ssam if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && 1535138568Ssam IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) 1536138568Ssam capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 1537138568Ssam if (ic->ic_flags & IEEE80211_F_SHSLOT) 1538138568Ssam capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; 1539138568Ssam *bo->bo_caps = htole16(capinfo); 1540138568Ssam 1541138568Ssam if (ic->ic_flags & IEEE80211_F_WME) { 1542138568Ssam struct ieee80211_wme_state *wme = &ic->ic_wme; 1543138568Ssam 1544138568Ssam /* 1545138568Ssam * Check for agressive mode change. When there is 1546138568Ssam * significant high priority traffic in the BSS 1547138568Ssam * throttle back BE traffic by using conservative 1548138568Ssam * parameters. Otherwise BE uses agressive params 1549138568Ssam * to optimize performance of legacy/non-QoS traffic. 1550138568Ssam */ 1551138568Ssam if (wme->wme_flags & WME_F_AGGRMODE) { 1552138568Ssam if (wme->wme_hipri_traffic > 1553138568Ssam wme->wme_hipri_switch_thresh) { 1554138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, 1555138568Ssam "%s: traffic %u, disable aggressive mode\n", 1556138568Ssam __func__, wme->wme_hipri_traffic); 1557138568Ssam wme->wme_flags &= ~WME_F_AGGRMODE; 1558138568Ssam ieee80211_wme_updateparams_locked(ic); 1559138568Ssam wme->wme_hipri_traffic = 1560138568Ssam wme->wme_hipri_switch_hysteresis; 1561138568Ssam } else 1562138568Ssam wme->wme_hipri_traffic = 0; 1563138568Ssam } else { 1564138568Ssam if (wme->wme_hipri_traffic <= 1565138568Ssam wme->wme_hipri_switch_thresh) { 1566138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME, 1567138568Ssam "%s: traffic %u, enable aggressive mode\n", 1568138568Ssam __func__, wme->wme_hipri_traffic); 1569138568Ssam wme->wme_flags |= WME_F_AGGRMODE; 1570138568Ssam ieee80211_wme_updateparams_locked(ic); 1571138568Ssam wme->wme_hipri_traffic = 0; 1572138568Ssam } else 1573138568Ssam wme->wme_hipri_traffic = 1574138568Ssam wme->wme_hipri_switch_hysteresis; 1575138568Ssam } 1576138568Ssam if (ic->ic_flags & IEEE80211_F_WMEUPDATE) { 1577138568Ssam (void) ieee80211_add_wme_param(bo->bo_wme, wme); 1578138568Ssam ic->ic_flags &= ~IEEE80211_F_WMEUPDATE; 1579138568Ssam } 1580138568Ssam } 1581138568Ssam 1582138568Ssam if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* NB: no IBSS support*/ 1583138568Ssam struct ieee80211_tim_ie *tie = 1584138568Ssam (struct ieee80211_tim_ie *) bo->bo_tim; 1585138568Ssam if (ic->ic_flags & IEEE80211_F_TIMUPDATE) { 1586138568Ssam u_int timlen, timoff, i; 1587138568Ssam /* 1588138568Ssam * ATIM/DTIM needs updating. If it fits in the 1589138568Ssam * current space allocated then just copy in the 1590138568Ssam * new bits. Otherwise we need to move any trailing 1591138568Ssam * data to make room. Note that we know there is 1592138568Ssam * contiguous space because ieee80211_beacon_allocate 1593138568Ssam * insures there is space in the mbuf to write a 1594138568Ssam * maximal-size virtual bitmap (based on ic_max_aid). 1595138568Ssam */ 1596138568Ssam /* 1597138568Ssam * Calculate the bitmap size and offset, copy any 1598138568Ssam * trailer out of the way, and then copy in the 1599138568Ssam * new bitmap and update the information element. 1600138568Ssam * Note that the tim bitmap must contain at least 1601138568Ssam * one byte and any offset must be even. 1602138568Ssam */ 1603138568Ssam if (ic->ic_ps_pending != 0) { 1604138568Ssam timoff = 128; /* impossibly large */ 1605138568Ssam for (i = 0; i < ic->ic_tim_len; i++) 1606138568Ssam if (ic->ic_tim_bitmap[i]) { 1607138568Ssam timoff = i &~ 1; 1608138568Ssam break; 1609138568Ssam } 1610138568Ssam KASSERT(timoff != 128, ("tim bitmap empty!")); 1611138568Ssam for (i = ic->ic_tim_len-1; i >= timoff; i--) 1612138568Ssam if (ic->ic_tim_bitmap[i]) 1613138568Ssam break; 1614138568Ssam timlen = 1 + (i - timoff); 1615138568Ssam } else { 1616138568Ssam timoff = 0; 1617138568Ssam timlen = 1; 1618138568Ssam } 1619138568Ssam if (timlen != bo->bo_tim_len) { 1620138568Ssam /* copy up/down trailer */ 1621153973Ssam int adjust = tie->tim_bitmap+timlen 1622153973Ssam - bo->bo_trailer; 1623153973Ssam ovbcopy(bo->bo_trailer, bo->bo_trailer+adjust, 1624138568Ssam bo->bo_trailer_len); 1625153973Ssam bo->bo_trailer += adjust; 1626153973Ssam bo->bo_wme += adjust; 1627153973Ssam bo->bo_erp += adjust; 1628138568Ssam bo->bo_tim_len = timlen; 1629138568Ssam 1630138568Ssam /* update information element */ 1631138568Ssam tie->tim_len = 3 + timlen; 1632138568Ssam tie->tim_bitctl = timoff; 1633138568Ssam len_changed = 1; 1634138568Ssam } 1635138568Ssam memcpy(tie->tim_bitmap, ic->ic_tim_bitmap + timoff, 1636138568Ssam bo->bo_tim_len); 1637138568Ssam 1638138568Ssam ic->ic_flags &= ~IEEE80211_F_TIMUPDATE; 1639138568Ssam 1640138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 1641138568Ssam "%s: TIM updated, pending %u, off %u, len %u\n", 1642138568Ssam __func__, ic->ic_ps_pending, timoff, timlen); 1643138568Ssam } 1644138568Ssam /* count down DTIM period */ 1645138568Ssam if (tie->tim_count == 0) 1646138568Ssam tie->tim_count = tie->tim_period - 1; 1647138568Ssam else 1648138568Ssam tie->tim_count--; 1649138568Ssam /* update state for buffered multicast frames on DTIM */ 1650153139Ssam if (mcast && tie->tim_count == 0) 1651138568Ssam tie->tim_bitctl |= 1; 1652138568Ssam else 1653138568Ssam tie->tim_bitctl &= ~1; 1654153973Ssam if (ic->ic_flags_ext & IEEE80211_FEXT_ERPUPDATE) { 1655153973Ssam /* 1656153973Ssam * ERP element needs updating. 1657153973Ssam */ 1658153973Ssam (void) ieee80211_add_erp(bo->bo_erp, ic); 1659153973Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_ERPUPDATE; 1660153973Ssam } 1661138568Ssam } 1662138568Ssam IEEE80211_BEACON_UNLOCK(ic); 1663138568Ssam 1664138568Ssam return len_changed; 1665138568Ssam} 1666138568Ssam 1667138568Ssam/* 1668138568Ssam * Save an outbound packet for a node in power-save sleep state. 1669138568Ssam * The new packet is placed on the node's saved queue, and the TIM 1670138568Ssam * is changed, if necessary. 1671138568Ssam */ 1672138568Ssamvoid 1673138568Ssamieee80211_pwrsave(struct ieee80211com *ic, struct ieee80211_node *ni, 1674138568Ssam struct mbuf *m) 1675138568Ssam{ 1676138568Ssam int qlen, age; 1677138568Ssam 1678138568Ssam IEEE80211_NODE_SAVEQ_LOCK(ni); 1679138568Ssam if (_IF_QFULL(&ni->ni_savedq)) { 1680138568Ssam _IF_DROP(&ni->ni_savedq); 1681138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1682138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY, 1683138568Ssam "[%s] pwr save q overflow, drops %d (size %d)\n", 1684138568Ssam ether_sprintf(ni->ni_macaddr), 1685138568Ssam ni->ni_savedq.ifq_drops, IEEE80211_PS_MAX_QUEUE); 1686138568Ssam#ifdef IEEE80211_DEBUG 1687138568Ssam if (ieee80211_msg_dumppkts(ic)) 1688138568Ssam ieee80211_dump_pkt(mtod(m, caddr_t), m->m_len, -1, -1); 1689138568Ssam#endif 1690138568Ssam m_freem(m); 1691138568Ssam return; 1692138568Ssam } 1693138568Ssam /* 1694138568Ssam * Tag the frame with it's expiry time and insert 1695138568Ssam * it in the queue. The aging interval is 4 times 1696138568Ssam * the listen interval specified by the station. 1697138568Ssam * Frames that sit around too long are reclaimed 1698138568Ssam * using this information. 1699138568Ssam */ 1700138568Ssam /* XXX handle overflow? */ 1701148843Ssam age = ((ni->ni_intval * ic->ic_bintval) << 2) / 1024; /* TU -> secs */ 1702138568Ssam _IEEE80211_NODE_SAVEQ_ENQUEUE(ni, m, qlen, age); 1703138568Ssam IEEE80211_NODE_SAVEQ_UNLOCK(ni); 1704138568Ssam 1705138568Ssam IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER, 1706148843Ssam "[%s] save frame with age %d, %u now queued\n", 1707148843Ssam ether_sprintf(ni->ni_macaddr), age, qlen); 1708138568Ssam 1709138568Ssam if (qlen == 1) 1710148304Ssam ic->ic_set_tim(ni, 1); 1711138568Ssam} 1712