ieee80211_freebsd.c revision 241610
1138568Ssam/*- 2186904Ssam * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting 3138568Ssam * All rights reserved. 4138568Ssam * 5138568Ssam * Redistribution and use in source and binary forms, with or without 6138568Ssam * modification, are permitted provided that the following conditions 7138568Ssam * are met: 8138568Ssam * 1. Redistributions of source code must retain the above copyright 9138568Ssam * notice, this list of conditions and the following disclaimer. 10138568Ssam * 2. Redistributions in binary form must reproduce the above copyright 11138568Ssam * notice, this list of conditions and the following disclaimer in the 12138568Ssam * documentation and/or other materials provided with the distribution. 13138568Ssam * 14138568Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15138568Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16138568Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17138568Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18138568Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19138568Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20138568Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21138568Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22138568Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23138568Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24138568Ssam */ 25138568Ssam 26138568Ssam#include <sys/cdefs.h> 27138568Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_freebsd.c 241610 2012-10-16 13:37:54Z glebius $"); 28138568Ssam 29138568Ssam/* 30138568Ssam * IEEE 802.11 support (FreeBSD-specific code) 31138568Ssam */ 32178354Ssam#include "opt_wlan.h" 33178354Ssam 34138568Ssam#include <sys/param.h> 35138568Ssam#include <sys/kernel.h> 36138568Ssam#include <sys/systm.h> 37138568Ssam#include <sys/linker.h> 38138568Ssam#include <sys/mbuf.h> 39138568Ssam#include <sys/module.h> 40138568Ssam#include <sys/proc.h> 41138568Ssam#include <sys/sysctl.h> 42138568Ssam 43138568Ssam#include <sys/socket.h> 44138568Ssam 45192468Ssam#include <net/bpf.h> 46138568Ssam#include <net/if.h> 47190526Ssam#include <net/if_dl.h> 48178354Ssam#include <net/if_clone.h> 49138568Ssam#include <net/if_media.h> 50178354Ssam#include <net/if_types.h> 51138568Ssam#include <net/ethernet.h> 52138568Ssam#include <net/route.h> 53196019Srwatson#include <net/vnet.h> 54138568Ssam 55138568Ssam#include <net80211/ieee80211_var.h> 56195757Ssam#include <net80211/ieee80211_input.h> 57138568Ssam 58138568SsamSYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 59138568Ssam 60138568Ssam#ifdef IEEE80211_DEBUG 61138568Ssamint ieee80211_debug = 0; 62138568SsamSYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 63138568Ssam 0, "debugging printfs"); 64138568Ssam#endif 65138568Ssam 66227293Sedstatic MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 67178354Ssam 68241610Sglebiusstatic const char wlanname[] = "wlan"; 69241610Sglebius 70241610Sglebiusstatic struct if_clone *wlan_cloner; 71241610Sglebius 72178354Ssam/* 73178354Ssam * Allocate/free com structure in conjunction with ifnet; 74178354Ssam * these routines are registered with if_register_com_alloc 75178354Ssam * below and are called automatically by the ifnet code 76178354Ssam * when the ifnet of the parent device is created. 77178354Ssam */ 78178354Ssamstatic void * 79178354Ssamwlan_alloc(u_char type, struct ifnet *ifp) 80178354Ssam{ 81178354Ssam struct ieee80211com *ic; 82178354Ssam 83178354Ssam ic = malloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK|M_ZERO); 84178354Ssam ic->ic_ifp = ifp; 85178354Ssam 86178354Ssam return (ic); 87178354Ssam} 88178354Ssam 89178354Ssamstatic void 90178354Ssamwlan_free(void *ic, u_char type) 91178354Ssam{ 92178354Ssam free(ic, M_80211_COM); 93178354Ssam} 94178354Ssam 95138568Ssamstatic int 96178354Ssamwlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 97173273Ssam{ 98178354Ssam struct ieee80211_clone_params cp; 99178354Ssam struct ieee80211vap *vap; 100178354Ssam struct ieee80211com *ic; 101178354Ssam struct ifnet *ifp; 102173273Ssam int error; 103173273Ssam 104178354Ssam error = copyin(params, &cp, sizeof(cp)); 105178354Ssam if (error) 106178354Ssam return error; 107178354Ssam ifp = ifunit(cp.icp_parent); 108178354Ssam if (ifp == NULL) 109178354Ssam return ENXIO; 110178957Ssam /* XXX move printfs to DIAGNOSTIC before release */ 111178354Ssam if (ifp->if_type != IFT_IEEE80211) { 112178354Ssam if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__); 113178957Ssam return ENXIO; 114178957Ssam } 115178957Ssam if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 116178957Ssam if_printf(ifp, "%s: invalid opmode %d\n", 117178957Ssam __func__, cp.icp_opmode); 118178354Ssam return EINVAL; 119178354Ssam } 120178354Ssam ic = ifp->if_l2com; 121178957Ssam if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 122178957Ssam if_printf(ifp, "%s mode not supported\n", 123178957Ssam ieee80211_opmode_name[cp.icp_opmode]); 124178957Ssam return EOPNOTSUPP; 125178957Ssam } 126186904Ssam if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 127186904Ssam#ifdef IEEE80211_SUPPORT_TDMA 128186904Ssam (ic->ic_caps & IEEE80211_C_TDMA) == 0 129186904Ssam#else 130186904Ssam (1) 131186904Ssam#endif 132186904Ssam ) { 133186904Ssam if_printf(ifp, "TDMA not supported\n"); 134186904Ssam return EOPNOTSUPP; 135186904Ssam } 136241610Sglebius vap = ic->ic_vap_create(ic, wlanname, unit, 137178354Ssam cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 138178354Ssam cp.icp_flags & IEEE80211_CLONE_MACADDR ? 139190526Ssam cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp)); 140178354Ssam return (vap == NULL ? EIO : 0); 141178354Ssam} 142178354Ssam 143178354Ssamstatic void 144178354Ssamwlan_clone_destroy(struct ifnet *ifp) 145178354Ssam{ 146178354Ssam struct ieee80211vap *vap = ifp->if_softc; 147178354Ssam struct ieee80211com *ic = vap->iv_ic; 148178354Ssam 149178354Ssam ic->ic_vap_delete(vap); 150178354Ssam} 151178354Ssam 152178354Ssamvoid 153178354Ssamieee80211_vap_destroy(struct ieee80211vap *vap) 154178354Ssam{ 155241610Sglebius if_clone_destroyif(wlan_cloner, vap->iv_ifp); 156178354Ssam} 157178354Ssam 158192473Ssamint 159178354Ssamieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 160178354Ssam{ 161178354Ssam int msecs = ticks_to_msecs(*(int *)arg1); 162178354Ssam int error, t; 163178354Ssam 164178354Ssam error = sysctl_handle_int(oidp, &msecs, 0, req); 165173273Ssam if (error || !req->newptr) 166173273Ssam return error; 167178354Ssam t = msecs_to_ticks(msecs); 168178354Ssam *(int *)arg1 = (t < 1) ? 1 : t; 169173273Ssam return 0; 170173273Ssam} 171178354Ssam 172173273Ssamstatic int 173138568Ssamieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 174138568Ssam{ 175138568Ssam int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 176138568Ssam int error; 177138568Ssam 178138568Ssam error = sysctl_handle_int(oidp, &inact, 0, req); 179138568Ssam if (error || !req->newptr) 180138568Ssam return error; 181138568Ssam *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 182138568Ssam return 0; 183138568Ssam} 184138568Ssam 185138568Ssamstatic int 186138568Ssamieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 187138568Ssam{ 188138568Ssam struct ieee80211com *ic = arg1; 189138568Ssam const char *name = ic->ic_ifp->if_xname; 190138568Ssam 191138568Ssam return SYSCTL_OUT(req, name, strlen(name)); 192138568Ssam} 193138568Ssam 194181194Ssamstatic int 195181194Ssamieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 196181194Ssam{ 197181194Ssam struct ieee80211com *ic = arg1; 198181194Ssam int t = 0, error; 199181194Ssam 200181194Ssam error = sysctl_handle_int(oidp, &t, 0, req); 201181194Ssam if (error || !req->newptr) 202181194Ssam return error; 203181194Ssam IEEE80211_LOCK(ic); 204181194Ssam ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 205181194Ssam IEEE80211_UNLOCK(ic); 206181194Ssam return 0; 207181194Ssam} 208181194Ssam 209138568Ssamvoid 210138568Ssamieee80211_sysctl_attach(struct ieee80211com *ic) 211138568Ssam{ 212178354Ssam} 213178354Ssam 214178354Ssamvoid 215178354Ssamieee80211_sysctl_detach(struct ieee80211com *ic) 216178354Ssam{ 217178354Ssam} 218178354Ssam 219178354Ssamvoid 220178354Ssamieee80211_sysctl_vattach(struct ieee80211vap *vap) 221178354Ssam{ 222178354Ssam struct ifnet *ifp = vap->iv_ifp; 223138568Ssam struct sysctl_ctx_list *ctx; 224138568Ssam struct sysctl_oid *oid; 225138568Ssam char num[14]; /* sufficient for 32 bits */ 226138568Ssam 227186302Ssam ctx = (struct sysctl_ctx_list *) malloc(sizeof(struct sysctl_ctx_list), 228138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 229138568Ssam if (ctx == NULL) { 230178354Ssam if_printf(ifp, "%s: cannot allocate sysctl context!\n", 231138568Ssam __func__); 232138568Ssam return; 233138568Ssam } 234138568Ssam sysctl_ctx_init(ctx); 235178354Ssam snprintf(num, sizeof(num), "%u", ifp->if_dunit); 236138568Ssam oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 237138568Ssam OID_AUTO, num, CTLFLAG_RD, NULL, ""); 238138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 239217554Smdf "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 240178354Ssam ieee80211_sysctl_parent, "A", "parent device"); 241217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 242178354Ssam "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 243178354Ssam "driver capabilities"); 244138568Ssam#ifdef IEEE80211_DEBUG 245178354Ssam vap->iv_debug = ieee80211_debug; 246217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 247178354Ssam "debug", CTLFLAG_RW, &vap->iv_debug, 0, 248138568Ssam "control debugging printfs"); 249138568Ssam#endif 250178354Ssam SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 251178354Ssam "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 252178354Ssam "consecutive beacon misses before scanning"); 253138568Ssam /* XXX inherit from tunables */ 254138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 255178354Ssam "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 256138568Ssam ieee80211_sysctl_inact, "I", 257138568Ssam "station inactivity timeout (sec)"); 258138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 259178354Ssam "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 260138568Ssam ieee80211_sysctl_inact, "I", 261138568Ssam "station inactivity probe timeout (sec)"); 262138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 263178354Ssam "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 264138568Ssam ieee80211_sysctl_inact, "I", 265138568Ssam "station authentication timeout (sec)"); 266138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 267178354Ssam "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 268138568Ssam ieee80211_sysctl_inact, "I", 269138568Ssam "station initial state timeout (sec)"); 270178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_HT) { 271217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 272178354Ssam "ampdu_mintraffic_bk", CTLFLAG_RW, 273178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 274178354Ssam "BK traffic tx aggr threshold (pps)"); 275217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 276178354Ssam "ampdu_mintraffic_be", CTLFLAG_RW, 277178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 278178354Ssam "BE traffic tx aggr threshold (pps)"); 279217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 280178354Ssam "ampdu_mintraffic_vo", CTLFLAG_RW, 281178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 282178354Ssam "VO traffic tx aggr threshold (pps)"); 283217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 284178354Ssam "ampdu_mintraffic_vi", CTLFLAG_RW, 285178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 286178354Ssam "VI traffic tx aggr threshold (pps)"); 287178354Ssam } 288181194Ssam if (vap->iv_caps & IEEE80211_C_DFS) { 289181194Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 290181194Ssam "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 291193115Ssam ieee80211_sysctl_radar, "I", "simulate radar event"); 292181194Ssam } 293178354Ssam vap->iv_sysctl = ctx; 294178354Ssam vap->iv_oid = oid; 295138568Ssam} 296138568Ssam 297138568Ssamvoid 298178354Ssamieee80211_sysctl_vdetach(struct ieee80211vap *vap) 299138568Ssam{ 300138568Ssam 301178354Ssam if (vap->iv_sysctl != NULL) { 302178354Ssam sysctl_ctx_free(vap->iv_sysctl); 303186302Ssam free(vap->iv_sysctl, M_DEVBUF); 304178354Ssam vap->iv_sysctl = NULL; 305138568Ssam } 306138568Ssam} 307138568Ssam 308138568Ssamint 309138568Ssamieee80211_node_dectestref(struct ieee80211_node *ni) 310138568Ssam{ 311138568Ssam /* XXX need equivalent of atomic_dec_and_test */ 312138568Ssam atomic_subtract_int(&ni->ni_refcnt, 1); 313138568Ssam return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 314138568Ssam} 315138568Ssam 316165894Ssamvoid 317165894Ssamieee80211_drain_ifq(struct ifqueue *ifq) 318165894Ssam{ 319165894Ssam struct ieee80211_node *ni; 320165894Ssam struct mbuf *m; 321165894Ssam 322165894Ssam for (;;) { 323165894Ssam IF_DEQUEUE(ifq, m); 324165894Ssam if (m == NULL) 325165894Ssam break; 326165894Ssam 327165894Ssam ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 328165894Ssam KASSERT(ni != NULL, ("frame w/o node")); 329165894Ssam ieee80211_free_node(ni); 330165894Ssam m->m_pkthdr.rcvif = NULL; 331165894Ssam 332165894Ssam m_freem(m); 333165894Ssam } 334165894Ssam} 335165894Ssam 336178354Ssamvoid 337178354Ssamieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 338178354Ssam{ 339178354Ssam struct ieee80211_node *ni; 340178354Ssam struct mbuf *m, **mprev; 341178354Ssam 342178354Ssam IF_LOCK(ifq); 343178354Ssam mprev = &ifq->ifq_head; 344178354Ssam while ((m = *mprev) != NULL) { 345178354Ssam ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 346178354Ssam if (ni != NULL && ni->ni_vap == vap) { 347178354Ssam *mprev = m->m_nextpkt; /* remove from list */ 348178354Ssam ifq->ifq_len--; 349178354Ssam 350178354Ssam m_freem(m); 351178354Ssam ieee80211_free_node(ni); /* reclaim ref */ 352178354Ssam } else 353178354Ssam mprev = &m->m_nextpkt; 354178354Ssam } 355178354Ssam /* recalculate tail ptr */ 356178354Ssam m = ifq->ifq_head; 357178354Ssam for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 358178354Ssam ; 359178354Ssam ifq->ifq_tail = m; 360178354Ssam IF_UNLOCK(ifq); 361178354Ssam} 362178354Ssam 363138568Ssam/* 364170530Ssam * As above, for mbufs allocated with m_gethdr/MGETHDR 365170530Ssam * or initialized by M_COPY_PKTHDR. 366170530Ssam */ 367170530Ssam#define MC_ALIGN(m, len) \ 368170530Ssamdo { \ 369170530Ssam (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 370170530Ssam} while (/* CONSTCOND */ 0) 371170530Ssam 372170530Ssam/* 373138568Ssam * Allocate and setup a management frame of the specified 374138568Ssam * size. We return the mbuf and a pointer to the start 375138568Ssam * of the contiguous data area that's been reserved based 376138568Ssam * on the packet length. The data area is forced to 32-bit 377138568Ssam * alignment and the buffer length to a multiple of 4 bytes. 378138568Ssam * This is done mainly so beacon frames (that require this) 379138568Ssam * can use this interface too. 380138568Ssam */ 381138568Ssamstruct mbuf * 382170530Ssamieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 383138568Ssam{ 384138568Ssam struct mbuf *m; 385138568Ssam u_int len; 386138568Ssam 387138568Ssam /* 388138568Ssam * NB: we know the mbuf routines will align the data area 389138568Ssam * so we don't need to do anything special. 390138568Ssam */ 391170530Ssam len = roundup2(headroom + pktlen, 4); 392138568Ssam KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 393138568Ssam if (len < MINCLSIZE) { 394151967Sandre m = m_gethdr(M_NOWAIT, MT_DATA); 395138568Ssam /* 396138568Ssam * Align the data in case additional headers are added. 397138568Ssam * This should only happen when a WEP header is added 398138568Ssam * which only happens for shared key authentication mgt 399138568Ssam * frames which all fit in MHLEN. 400138568Ssam */ 401138568Ssam if (m != NULL) 402138568Ssam MH_ALIGN(m, len); 403170530Ssam } else { 404151967Sandre m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 405170530Ssam if (m != NULL) 406170530Ssam MC_ALIGN(m, len); 407170530Ssam } 408138568Ssam if (m != NULL) { 409171984Ssephe m->m_data += headroom; 410138568Ssam *frm = m->m_data; 411138568Ssam } 412138568Ssam return m; 413138568Ssam} 414138568Ssam 415195757Ssam/* 416195757Ssam * Re-align the payload in the mbuf. This is mainly used (right now) 417195757Ssam * to handle IP header alignment requirements on certain architectures. 418195757Ssam */ 419195757Ssamstruct mbuf * 420195757Ssamieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 421195757Ssam{ 422195757Ssam int pktlen, space; 423195757Ssam struct mbuf *n; 424195757Ssam 425195757Ssam pktlen = m->m_pkthdr.len; 426195757Ssam space = pktlen + align; 427195757Ssam if (space < MINCLSIZE) 428195757Ssam n = m_gethdr(M_DONTWAIT, MT_DATA); 429195757Ssam else { 430195757Ssam n = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, 431195757Ssam space <= MCLBYTES ? MCLBYTES : 432195757Ssam#if MJUMPAGESIZE != MCLBYTES 433195757Ssam space <= MJUMPAGESIZE ? MJUMPAGESIZE : 434195757Ssam#endif 435195757Ssam space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 436195757Ssam } 437195757Ssam if (__predict_true(n != NULL)) { 438195757Ssam m_move_pkthdr(n, m); 439195757Ssam n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 440195757Ssam m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 441195757Ssam n->m_len = pktlen; 442195757Ssam } else { 443195757Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 444195757Ssam mtod(m, const struct ieee80211_frame *), NULL, 445195757Ssam "%s", "no mbuf to realign"); 446195757Ssam vap->iv_stats.is_rx_badalign++; 447195757Ssam } 448195757Ssam m_freem(m); 449195757Ssam return n; 450195757Ssam} 451195757Ssam 452170530Ssamint 453170530Ssamieee80211_add_callback(struct mbuf *m, 454170530Ssam void (*func)(struct ieee80211_node *, void *, int), void *arg) 455170530Ssam{ 456170530Ssam struct m_tag *mtag; 457170530Ssam struct ieee80211_cb *cb; 458170530Ssam 459170530Ssam mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 460170530Ssam sizeof(struct ieee80211_cb), M_NOWAIT); 461170530Ssam if (mtag == NULL) 462170530Ssam return 0; 463170530Ssam 464170530Ssam cb = (struct ieee80211_cb *)(mtag+1); 465170530Ssam cb->func = func; 466170530Ssam cb->arg = arg; 467170530Ssam m_tag_prepend(m, mtag); 468170530Ssam m->m_flags |= M_TXCB; 469170530Ssam return 1; 470170530Ssam} 471170530Ssam 472170530Ssamvoid 473170530Ssamieee80211_process_callback(struct ieee80211_node *ni, 474170530Ssam struct mbuf *m, int status) 475170530Ssam{ 476170530Ssam struct m_tag *mtag; 477170530Ssam 478170530Ssam mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 479170530Ssam if (mtag != NULL) { 480170530Ssam struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 481170530Ssam cb->func(ni, cb->arg, status); 482170530Ssam } 483170530Ssam} 484170530Ssam 485138568Ssam#include <sys/libkern.h> 486138568Ssam 487138568Ssamvoid 488138568Ssamget_random_bytes(void *p, size_t n) 489138568Ssam{ 490170530Ssam uint8_t *dp = p; 491138568Ssam 492138568Ssam while (n > 0) { 493170530Ssam uint32_t v = arc4random(); 494170530Ssam size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 495170530Ssam bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 496170530Ssam dp += sizeof(uint32_t), n -= nb; 497138568Ssam } 498138568Ssam} 499138568Ssam 500178354Ssam/* 501178354Ssam * Helper function for events that pass just a single mac address. 502178354Ssam */ 503178354Ssamstatic void 504178354Ssamnotify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 505138568Ssam{ 506138568Ssam struct ieee80211_join_event iev; 507138568Ssam 508191816Szec CURVNET_SET(ifp->if_vnet); 509144302Ssam memset(&iev, 0, sizeof(iev)); 510178354Ssam IEEE80211_ADDR_COPY(iev.iev_addr, mac); 511178354Ssam rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 512191816Szec CURVNET_RESTORE(); 513178354Ssam} 514178354Ssam 515178354Ssamvoid 516178354Ssamieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 517178354Ssam{ 518178354Ssam struct ieee80211vap *vap = ni->ni_vap; 519178354Ssam struct ifnet *ifp = vap->iv_ifp; 520178354Ssam 521191816Szec CURVNET_SET_QUIET(ifp->if_vnet); 522178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 523178354Ssam (ni == vap->iv_bss) ? "bss " : ""); 524178354Ssam 525178354Ssam if (ni == vap->iv_bss) { 526178354Ssam notify_macaddr(ifp, newassoc ? 527178354Ssam RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 528138568Ssam if_link_state_change(ifp, LINK_STATE_UP); 529144302Ssam } else { 530178354Ssam notify_macaddr(ifp, newassoc ? 531178354Ssam RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 532138568Ssam } 533191816Szec CURVNET_RESTORE(); 534138568Ssam} 535138568Ssam 536138568Ssamvoid 537178354Ssamieee80211_notify_node_leave(struct ieee80211_node *ni) 538138568Ssam{ 539178354Ssam struct ieee80211vap *vap = ni->ni_vap; 540178354Ssam struct ifnet *ifp = vap->iv_ifp; 541138568Ssam 542191816Szec CURVNET_SET_QUIET(ifp->if_vnet); 543178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 544178354Ssam (ni == vap->iv_bss) ? "bss " : ""); 545178354Ssam 546178354Ssam if (ni == vap->iv_bss) { 547138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 548138568Ssam if_link_state_change(ifp, LINK_STATE_DOWN); 549138568Ssam } else { 550138568Ssam /* fire off wireless event station leaving */ 551178354Ssam notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 552138568Ssam } 553191816Szec CURVNET_RESTORE(); 554138568Ssam} 555138568Ssam 556138568Ssamvoid 557178354Ssamieee80211_notify_scan_done(struct ieee80211vap *vap) 558138568Ssam{ 559178354Ssam struct ifnet *ifp = vap->iv_ifp; 560138568Ssam 561178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 562138568Ssam 563138568Ssam /* dispatch wireless event indicating scan completed */ 564191816Szec CURVNET_SET(ifp->if_vnet); 565138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 566191816Szec CURVNET_RESTORE(); 567138568Ssam} 568138568Ssam 569138568Ssamvoid 570178354Ssamieee80211_notify_replay_failure(struct ieee80211vap *vap, 571138568Ssam const struct ieee80211_frame *wh, const struct ieee80211_key *k, 572193541Ssam u_int64_t rsc, int tid) 573138568Ssam{ 574178354Ssam struct ifnet *ifp = vap->iv_ifp; 575138568Ssam 576178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 577226885Sadrian "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 578233531Sadrian k->wk_cipher->ic_name, tid, (intmax_t) rsc, 579193541Ssam (intmax_t) k->wk_keyrsc[tid], 580148863Ssam k->wk_keyix, k->wk_rxkeyix); 581138568Ssam 582138568Ssam if (ifp != NULL) { /* NB: for cipher test modules */ 583138568Ssam struct ieee80211_replay_event iev; 584138568Ssam 585138568Ssam IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 586138568Ssam IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 587138568Ssam iev.iev_cipher = k->wk_cipher->ic_cipher; 588148863Ssam if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 589148863Ssam iev.iev_keyix = k->wk_rxkeyix; 590148863Ssam else 591148863Ssam iev.iev_keyix = k->wk_keyix; 592193541Ssam iev.iev_keyrsc = k->wk_keyrsc[tid]; 593138568Ssam iev.iev_rsc = rsc; 594191816Szec CURVNET_SET(ifp->if_vnet); 595138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 596191816Szec CURVNET_RESTORE(); 597138568Ssam } 598138568Ssam} 599138568Ssam 600138568Ssamvoid 601178354Ssamieee80211_notify_michael_failure(struct ieee80211vap *vap, 602138568Ssam const struct ieee80211_frame *wh, u_int keyix) 603138568Ssam{ 604178354Ssam struct ifnet *ifp = vap->iv_ifp; 605138568Ssam 606178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 607178354Ssam "michael MIC verification failed <keyix %u>", keyix); 608178354Ssam vap->iv_stats.is_rx_tkipmic++; 609138568Ssam 610138568Ssam if (ifp != NULL) { /* NB: for cipher test modules */ 611138568Ssam struct ieee80211_michael_event iev; 612138568Ssam 613138568Ssam IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 614138568Ssam IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 615138568Ssam iev.iev_cipher = IEEE80211_CIPHER_TKIP; 616138568Ssam iev.iev_keyix = keyix; 617191816Szec CURVNET_SET(ifp->if_vnet); 618138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 619191816Szec CURVNET_RESTORE(); 620138568Ssam } 621138568Ssam} 622138568Ssam 623138568Ssamvoid 624178354Ssamieee80211_notify_wds_discover(struct ieee80211_node *ni) 625178354Ssam{ 626178354Ssam struct ieee80211vap *vap = ni->ni_vap; 627178354Ssam struct ifnet *ifp = vap->iv_ifp; 628178354Ssam 629178354Ssam notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 630178354Ssam} 631178354Ssam 632178354Ssamvoid 633178354Ssamieee80211_notify_csa(struct ieee80211com *ic, 634178354Ssam const struct ieee80211_channel *c, int mode, int count) 635178354Ssam{ 636178354Ssam struct ifnet *ifp = ic->ic_ifp; 637178354Ssam struct ieee80211_csa_event iev; 638178354Ssam 639178354Ssam memset(&iev, 0, sizeof(iev)); 640178354Ssam iev.iev_flags = c->ic_flags; 641178354Ssam iev.iev_freq = c->ic_freq; 642178354Ssam iev.iev_ieee = c->ic_ieee; 643178354Ssam iev.iev_mode = mode; 644178354Ssam iev.iev_count = count; 645178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 646178354Ssam} 647178354Ssam 648178354Ssamvoid 649178354Ssamieee80211_notify_radar(struct ieee80211com *ic, 650178354Ssam const struct ieee80211_channel *c) 651178354Ssam{ 652178354Ssam struct ifnet *ifp = ic->ic_ifp; 653178354Ssam struct ieee80211_radar_event iev; 654178354Ssam 655178354Ssam memset(&iev, 0, sizeof(iev)); 656178354Ssam iev.iev_flags = c->ic_flags; 657178354Ssam iev.iev_freq = c->ic_freq; 658178354Ssam iev.iev_ieee = c->ic_ieee; 659178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 660178354Ssam} 661178354Ssam 662178354Ssamvoid 663178354Ssamieee80211_notify_cac(struct ieee80211com *ic, 664178354Ssam const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 665178354Ssam{ 666178354Ssam struct ifnet *ifp = ic->ic_ifp; 667178354Ssam struct ieee80211_cac_event iev; 668178354Ssam 669178354Ssam memset(&iev, 0, sizeof(iev)); 670178354Ssam iev.iev_flags = c->ic_flags; 671178354Ssam iev.iev_freq = c->ic_freq; 672178354Ssam iev.iev_ieee = c->ic_ieee; 673178354Ssam iev.iev_type = type; 674178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 675178354Ssam} 676178354Ssam 677178354Ssamvoid 678178354Ssamieee80211_notify_node_deauth(struct ieee80211_node *ni) 679178354Ssam{ 680178354Ssam struct ieee80211vap *vap = ni->ni_vap; 681178354Ssam struct ifnet *ifp = vap->iv_ifp; 682178354Ssam 683178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 684178354Ssam 685178354Ssam notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 686178354Ssam} 687178354Ssam 688178354Ssamvoid 689178354Ssamieee80211_notify_node_auth(struct ieee80211_node *ni) 690178354Ssam{ 691178354Ssam struct ieee80211vap *vap = ni->ni_vap; 692178354Ssam struct ifnet *ifp = vap->iv_ifp; 693178354Ssam 694178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 695178354Ssam 696178354Ssam notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 697178354Ssam} 698178354Ssam 699178354Ssamvoid 700178354Ssamieee80211_notify_country(struct ieee80211vap *vap, 701178354Ssam const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 702178354Ssam{ 703178354Ssam struct ifnet *ifp = vap->iv_ifp; 704178354Ssam struct ieee80211_country_event iev; 705178354Ssam 706178354Ssam memset(&iev, 0, sizeof(iev)); 707178354Ssam IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 708178354Ssam iev.iev_cc[0] = cc[0]; 709178354Ssam iev.iev_cc[1] = cc[1]; 710178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 711178354Ssam} 712178354Ssam 713178354Ssamvoid 714178354Ssamieee80211_notify_radio(struct ieee80211com *ic, int state) 715178354Ssam{ 716178354Ssam struct ifnet *ifp = ic->ic_ifp; 717178354Ssam struct ieee80211_radio_event iev; 718178354Ssam 719178354Ssam memset(&iev, 0, sizeof(iev)); 720178354Ssam iev.iev_state = state; 721178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 722178354Ssam} 723178354Ssam 724178354Ssamvoid 725138568Ssamieee80211_load_module(const char *modname) 726138568Ssam{ 727159590Sjhb 728138777Ssam#ifdef notyet 729159590Sjhb (void)kern_kldload(curthread, modname, NULL); 730138777Ssam#else 731138777Ssam printf("%s: load the %s module by hand for now.\n", __func__, modname); 732138777Ssam#endif 733138568Ssam} 734138568Ssam 735192468Ssamstatic eventhandler_tag wlan_bpfevent; 736202612Sthompsastatic eventhandler_tag wlan_ifllevent; 737192468Ssam 738192468Ssamstatic void 739192764Ssambpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 740192468Ssam{ 741192468Ssam /* NB: identify vap's by if_start */ 742192764Ssam if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) { 743192468Ssam struct ieee80211vap *vap = ifp->if_softc; 744192468Ssam /* 745192468Ssam * Track bpf radiotap listener state. We mark the vap 746192468Ssam * to indicate if any listener is present and the com 747192468Ssam * to indicate if any listener exists on any associated 748192468Ssam * vap. This flag is used by drivers to prepare radiotap 749192468Ssam * state only when needed. 750192468Ssam */ 751193292Ssam if (attach) { 752192468Ssam ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 753193292Ssam if (vap->iv_opmode == IEEE80211_M_MONITOR) 754193292Ssam atomic_add_int(&vap->iv_ic->ic_montaps, 1); 755193312Ssam } else if (!bpf_peers_present(vap->iv_rawbpf)) { 756192468Ssam ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 757193292Ssam if (vap->iv_opmode == IEEE80211_M_MONITOR) 758193292Ssam atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 759193292Ssam } 760192468Ssam } 761192468Ssam} 762192468Ssam 763202612Sthompsastatic void 764202612Sthompsawlan_iflladdr(void *arg __unused, struct ifnet *ifp) 765202612Sthompsa{ 766202612Sthompsa struct ieee80211com *ic = ifp->if_l2com; 767202612Sthompsa struct ieee80211vap *vap, *next; 768202612Sthompsa 769202612Sthompsa if (ifp->if_type != IFT_IEEE80211 || ic == NULL) 770202612Sthompsa return; 771202612Sthompsa 772202612Sthompsa IEEE80211_LOCK(ic); 773202612Sthompsa TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) { 774202612Sthompsa /* 775202612Sthompsa * If the MAC address has changed on the parent and it was 776202612Sthompsa * copied to the vap on creation then re-sync. 777202612Sthompsa */ 778202612Sthompsa if (vap->iv_ic == ic && 779202612Sthompsa (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 780202612Sthompsa IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 781202612Sthompsa IEEE80211_UNLOCK(ic); 782202612Sthompsa if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 783202612Sthompsa IEEE80211_ADDR_LEN); 784202612Sthompsa IEEE80211_LOCK(ic); 785202612Sthompsa } 786202612Sthompsa } 787202612Sthompsa IEEE80211_UNLOCK(ic); 788202612Sthompsa} 789202612Sthompsa 790138568Ssam/* 791138568Ssam * Module glue. 792138568Ssam * 793138568Ssam * NB: the module name is "wlan" for compatibility with NetBSD. 794138568Ssam */ 795138568Ssamstatic int 796138568Ssamwlan_modevent(module_t mod, int type, void *unused) 797138568Ssam{ 798138568Ssam switch (type) { 799138568Ssam case MOD_LOAD: 800138568Ssam if (bootverbose) 801138568Ssam printf("wlan: <802.11 Link Layer>\n"); 802192468Ssam wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 803192468Ssam bpf_track, 0, EVENTHANDLER_PRI_ANY); 804192468Ssam if (wlan_bpfevent == NULL) 805192468Ssam return ENOMEM; 806202612Sthompsa wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 807202612Sthompsa wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 808202612Sthompsa if (wlan_ifllevent == NULL) { 809202612Sthompsa EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 810202612Sthompsa return ENOMEM; 811202612Sthompsa } 812241610Sglebius wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 813241610Sglebius wlan_clone_destroy, 0); 814178354Ssam if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 815138568Ssam return 0; 816138568Ssam case MOD_UNLOAD: 817178354Ssam if_deregister_com_alloc(IFT_IEEE80211); 818241610Sglebius if_clone_detach(wlan_cloner); 819192468Ssam EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 820202612Sthompsa EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 821138568Ssam return 0; 822138568Ssam } 823138568Ssam return EINVAL; 824138568Ssam} 825138568Ssam 826138568Ssamstatic moduledata_t wlan_mod = { 827241610Sglebius wlanname, 828138568Ssam wlan_modevent, 829241394Skevlo 0 830138568Ssam}; 831138568SsamDECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 832138568SsamMODULE_VERSION(wlan, 1); 833138568SsamMODULE_DEPEND(wlan, ether, 1, 1, 1); 834233050Sadrian#ifdef IEEE80211_ALQ 835233050SadrianMODULE_DEPEND(wlan, alq, 1, 1, 1); 836233050Sadrian#endif /* IEEE80211_ALQ */ 837233050Sadrian 838