ieee80211_freebsd.c revision 241394
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 241394 2012-10-10 08:36:38Z kevlo $"); 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 68178354Ssam/* 69178354Ssam * Allocate/free com structure in conjunction with ifnet; 70178354Ssam * these routines are registered with if_register_com_alloc 71178354Ssam * below and are called automatically by the ifnet code 72178354Ssam * when the ifnet of the parent device is created. 73178354Ssam */ 74178354Ssamstatic void * 75178354Ssamwlan_alloc(u_char type, struct ifnet *ifp) 76178354Ssam{ 77178354Ssam struct ieee80211com *ic; 78178354Ssam 79178354Ssam ic = malloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK|M_ZERO); 80178354Ssam ic->ic_ifp = ifp; 81178354Ssam 82178354Ssam return (ic); 83178354Ssam} 84178354Ssam 85178354Ssamstatic void 86178354Ssamwlan_free(void *ic, u_char type) 87178354Ssam{ 88178354Ssam free(ic, M_80211_COM); 89178354Ssam} 90178354Ssam 91138568Ssamstatic int 92178354Ssamwlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) 93173273Ssam{ 94178354Ssam struct ieee80211_clone_params cp; 95178354Ssam struct ieee80211vap *vap; 96178354Ssam struct ieee80211com *ic; 97178354Ssam struct ifnet *ifp; 98173273Ssam int error; 99173273Ssam 100178354Ssam error = copyin(params, &cp, sizeof(cp)); 101178354Ssam if (error) 102178354Ssam return error; 103178354Ssam ifp = ifunit(cp.icp_parent); 104178354Ssam if (ifp == NULL) 105178354Ssam return ENXIO; 106178957Ssam /* XXX move printfs to DIAGNOSTIC before release */ 107178354Ssam if (ifp->if_type != IFT_IEEE80211) { 108178354Ssam if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__); 109178957Ssam return ENXIO; 110178957Ssam } 111178957Ssam if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 112178957Ssam if_printf(ifp, "%s: invalid opmode %d\n", 113178957Ssam __func__, cp.icp_opmode); 114178354Ssam return EINVAL; 115178354Ssam } 116178354Ssam ic = ifp->if_l2com; 117178957Ssam if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 118178957Ssam if_printf(ifp, "%s mode not supported\n", 119178957Ssam ieee80211_opmode_name[cp.icp_opmode]); 120178957Ssam return EOPNOTSUPP; 121178957Ssam } 122186904Ssam if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 123186904Ssam#ifdef IEEE80211_SUPPORT_TDMA 124186904Ssam (ic->ic_caps & IEEE80211_C_TDMA) == 0 125186904Ssam#else 126186904Ssam (1) 127186904Ssam#endif 128186904Ssam ) { 129186904Ssam if_printf(ifp, "TDMA not supported\n"); 130186904Ssam return EOPNOTSUPP; 131186904Ssam } 132178354Ssam vap = ic->ic_vap_create(ic, ifc->ifc_name, unit, 133178354Ssam cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 134178354Ssam cp.icp_flags & IEEE80211_CLONE_MACADDR ? 135190526Ssam cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp)); 136178354Ssam return (vap == NULL ? EIO : 0); 137178354Ssam} 138178354Ssam 139178354Ssamstatic void 140178354Ssamwlan_clone_destroy(struct ifnet *ifp) 141178354Ssam{ 142178354Ssam struct ieee80211vap *vap = ifp->if_softc; 143178354Ssam struct ieee80211com *ic = vap->iv_ic; 144178354Ssam 145178354Ssam ic->ic_vap_delete(vap); 146178354Ssam} 147178354SsamIFC_SIMPLE_DECLARE(wlan, 0); 148178354Ssam 149178354Ssamvoid 150178354Ssamieee80211_vap_destroy(struct ieee80211vap *vap) 151178354Ssam{ 152183210Sthompsa if_clone_destroyif(&wlan_cloner, vap->iv_ifp); 153178354Ssam} 154178354Ssam 155192473Ssamint 156178354Ssamieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 157178354Ssam{ 158178354Ssam int msecs = ticks_to_msecs(*(int *)arg1); 159178354Ssam int error, t; 160178354Ssam 161178354Ssam error = sysctl_handle_int(oidp, &msecs, 0, req); 162173273Ssam if (error || !req->newptr) 163173273Ssam return error; 164178354Ssam t = msecs_to_ticks(msecs); 165178354Ssam *(int *)arg1 = (t < 1) ? 1 : t; 166173273Ssam return 0; 167173273Ssam} 168178354Ssam 169173273Ssamstatic int 170138568Ssamieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 171138568Ssam{ 172138568Ssam int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 173138568Ssam int error; 174138568Ssam 175138568Ssam error = sysctl_handle_int(oidp, &inact, 0, req); 176138568Ssam if (error || !req->newptr) 177138568Ssam return error; 178138568Ssam *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 179138568Ssam return 0; 180138568Ssam} 181138568Ssam 182138568Ssamstatic int 183138568Ssamieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 184138568Ssam{ 185138568Ssam struct ieee80211com *ic = arg1; 186138568Ssam const char *name = ic->ic_ifp->if_xname; 187138568Ssam 188138568Ssam return SYSCTL_OUT(req, name, strlen(name)); 189138568Ssam} 190138568Ssam 191181194Ssamstatic int 192181194Ssamieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 193181194Ssam{ 194181194Ssam struct ieee80211com *ic = arg1; 195181194Ssam int t = 0, error; 196181194Ssam 197181194Ssam error = sysctl_handle_int(oidp, &t, 0, req); 198181194Ssam if (error || !req->newptr) 199181194Ssam return error; 200181194Ssam IEEE80211_LOCK(ic); 201181194Ssam ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 202181194Ssam IEEE80211_UNLOCK(ic); 203181194Ssam return 0; 204181194Ssam} 205181194Ssam 206138568Ssamvoid 207138568Ssamieee80211_sysctl_attach(struct ieee80211com *ic) 208138568Ssam{ 209178354Ssam} 210178354Ssam 211178354Ssamvoid 212178354Ssamieee80211_sysctl_detach(struct ieee80211com *ic) 213178354Ssam{ 214178354Ssam} 215178354Ssam 216178354Ssamvoid 217178354Ssamieee80211_sysctl_vattach(struct ieee80211vap *vap) 218178354Ssam{ 219178354Ssam struct ifnet *ifp = vap->iv_ifp; 220138568Ssam struct sysctl_ctx_list *ctx; 221138568Ssam struct sysctl_oid *oid; 222138568Ssam char num[14]; /* sufficient for 32 bits */ 223138568Ssam 224186302Ssam ctx = (struct sysctl_ctx_list *) malloc(sizeof(struct sysctl_ctx_list), 225138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 226138568Ssam if (ctx == NULL) { 227178354Ssam if_printf(ifp, "%s: cannot allocate sysctl context!\n", 228138568Ssam __func__); 229138568Ssam return; 230138568Ssam } 231138568Ssam sysctl_ctx_init(ctx); 232178354Ssam snprintf(num, sizeof(num), "%u", ifp->if_dunit); 233138568Ssam oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 234138568Ssam OID_AUTO, num, CTLFLAG_RD, NULL, ""); 235138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 236217554Smdf "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 237178354Ssam ieee80211_sysctl_parent, "A", "parent device"); 238217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 239178354Ssam "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 240178354Ssam "driver capabilities"); 241138568Ssam#ifdef IEEE80211_DEBUG 242178354Ssam vap->iv_debug = ieee80211_debug; 243217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 244178354Ssam "debug", CTLFLAG_RW, &vap->iv_debug, 0, 245138568Ssam "control debugging printfs"); 246138568Ssam#endif 247178354Ssam SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 248178354Ssam "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 249178354Ssam "consecutive beacon misses before scanning"); 250138568Ssam /* XXX inherit from tunables */ 251138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 252178354Ssam "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 253138568Ssam ieee80211_sysctl_inact, "I", 254138568Ssam "station inactivity timeout (sec)"); 255138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 256178354Ssam "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 257138568Ssam ieee80211_sysctl_inact, "I", 258138568Ssam "station inactivity probe timeout (sec)"); 259138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 260178354Ssam "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 261138568Ssam ieee80211_sysctl_inact, "I", 262138568Ssam "station authentication timeout (sec)"); 263138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 264178354Ssam "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 265138568Ssam ieee80211_sysctl_inact, "I", 266138568Ssam "station initial state timeout (sec)"); 267178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_HT) { 268217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 269178354Ssam "ampdu_mintraffic_bk", CTLFLAG_RW, 270178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 271178354Ssam "BK traffic tx aggr threshold (pps)"); 272217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 273178354Ssam "ampdu_mintraffic_be", CTLFLAG_RW, 274178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 275178354Ssam "BE traffic tx aggr threshold (pps)"); 276217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 277178354Ssam "ampdu_mintraffic_vo", CTLFLAG_RW, 278178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 279178354Ssam "VO traffic tx aggr threshold (pps)"); 280217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 281178354Ssam "ampdu_mintraffic_vi", CTLFLAG_RW, 282178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 283178354Ssam "VI traffic tx aggr threshold (pps)"); 284178354Ssam } 285181194Ssam if (vap->iv_caps & IEEE80211_C_DFS) { 286181194Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 287181194Ssam "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 288193115Ssam ieee80211_sysctl_radar, "I", "simulate radar event"); 289181194Ssam } 290178354Ssam vap->iv_sysctl = ctx; 291178354Ssam vap->iv_oid = oid; 292138568Ssam} 293138568Ssam 294138568Ssamvoid 295178354Ssamieee80211_sysctl_vdetach(struct ieee80211vap *vap) 296138568Ssam{ 297138568Ssam 298178354Ssam if (vap->iv_sysctl != NULL) { 299178354Ssam sysctl_ctx_free(vap->iv_sysctl); 300186302Ssam free(vap->iv_sysctl, M_DEVBUF); 301178354Ssam vap->iv_sysctl = NULL; 302138568Ssam } 303138568Ssam} 304138568Ssam 305138568Ssamint 306138568Ssamieee80211_node_dectestref(struct ieee80211_node *ni) 307138568Ssam{ 308138568Ssam /* XXX need equivalent of atomic_dec_and_test */ 309138568Ssam atomic_subtract_int(&ni->ni_refcnt, 1); 310138568Ssam return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 311138568Ssam} 312138568Ssam 313165894Ssamvoid 314165894Ssamieee80211_drain_ifq(struct ifqueue *ifq) 315165894Ssam{ 316165894Ssam struct ieee80211_node *ni; 317165894Ssam struct mbuf *m; 318165894Ssam 319165894Ssam for (;;) { 320165894Ssam IF_DEQUEUE(ifq, m); 321165894Ssam if (m == NULL) 322165894Ssam break; 323165894Ssam 324165894Ssam ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 325165894Ssam KASSERT(ni != NULL, ("frame w/o node")); 326165894Ssam ieee80211_free_node(ni); 327165894Ssam m->m_pkthdr.rcvif = NULL; 328165894Ssam 329165894Ssam m_freem(m); 330165894Ssam } 331165894Ssam} 332165894Ssam 333178354Ssamvoid 334178354Ssamieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 335178354Ssam{ 336178354Ssam struct ieee80211_node *ni; 337178354Ssam struct mbuf *m, **mprev; 338178354Ssam 339178354Ssam IF_LOCK(ifq); 340178354Ssam mprev = &ifq->ifq_head; 341178354Ssam while ((m = *mprev) != NULL) { 342178354Ssam ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 343178354Ssam if (ni != NULL && ni->ni_vap == vap) { 344178354Ssam *mprev = m->m_nextpkt; /* remove from list */ 345178354Ssam ifq->ifq_len--; 346178354Ssam 347178354Ssam m_freem(m); 348178354Ssam ieee80211_free_node(ni); /* reclaim ref */ 349178354Ssam } else 350178354Ssam mprev = &m->m_nextpkt; 351178354Ssam } 352178354Ssam /* recalculate tail ptr */ 353178354Ssam m = ifq->ifq_head; 354178354Ssam for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 355178354Ssam ; 356178354Ssam ifq->ifq_tail = m; 357178354Ssam IF_UNLOCK(ifq); 358178354Ssam} 359178354Ssam 360138568Ssam/* 361170530Ssam * As above, for mbufs allocated with m_gethdr/MGETHDR 362170530Ssam * or initialized by M_COPY_PKTHDR. 363170530Ssam */ 364170530Ssam#define MC_ALIGN(m, len) \ 365170530Ssamdo { \ 366170530Ssam (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 367170530Ssam} while (/* CONSTCOND */ 0) 368170530Ssam 369170530Ssam/* 370138568Ssam * Allocate and setup a management frame of the specified 371138568Ssam * size. We return the mbuf and a pointer to the start 372138568Ssam * of the contiguous data area that's been reserved based 373138568Ssam * on the packet length. The data area is forced to 32-bit 374138568Ssam * alignment and the buffer length to a multiple of 4 bytes. 375138568Ssam * This is done mainly so beacon frames (that require this) 376138568Ssam * can use this interface too. 377138568Ssam */ 378138568Ssamstruct mbuf * 379170530Ssamieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 380138568Ssam{ 381138568Ssam struct mbuf *m; 382138568Ssam u_int len; 383138568Ssam 384138568Ssam /* 385138568Ssam * NB: we know the mbuf routines will align the data area 386138568Ssam * so we don't need to do anything special. 387138568Ssam */ 388170530Ssam len = roundup2(headroom + pktlen, 4); 389138568Ssam KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 390138568Ssam if (len < MINCLSIZE) { 391151967Sandre m = m_gethdr(M_NOWAIT, MT_DATA); 392138568Ssam /* 393138568Ssam * Align the data in case additional headers are added. 394138568Ssam * This should only happen when a WEP header is added 395138568Ssam * which only happens for shared key authentication mgt 396138568Ssam * frames which all fit in MHLEN. 397138568Ssam */ 398138568Ssam if (m != NULL) 399138568Ssam MH_ALIGN(m, len); 400170530Ssam } else { 401151967Sandre m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 402170530Ssam if (m != NULL) 403170530Ssam MC_ALIGN(m, len); 404170530Ssam } 405138568Ssam if (m != NULL) { 406171984Ssephe m->m_data += headroom; 407138568Ssam *frm = m->m_data; 408138568Ssam } 409138568Ssam return m; 410138568Ssam} 411138568Ssam 412195757Ssam/* 413195757Ssam * Re-align the payload in the mbuf. This is mainly used (right now) 414195757Ssam * to handle IP header alignment requirements on certain architectures. 415195757Ssam */ 416195757Ssamstruct mbuf * 417195757Ssamieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 418195757Ssam{ 419195757Ssam int pktlen, space; 420195757Ssam struct mbuf *n; 421195757Ssam 422195757Ssam pktlen = m->m_pkthdr.len; 423195757Ssam space = pktlen + align; 424195757Ssam if (space < MINCLSIZE) 425195757Ssam n = m_gethdr(M_DONTWAIT, MT_DATA); 426195757Ssam else { 427195757Ssam n = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, 428195757Ssam space <= MCLBYTES ? MCLBYTES : 429195757Ssam#if MJUMPAGESIZE != MCLBYTES 430195757Ssam space <= MJUMPAGESIZE ? MJUMPAGESIZE : 431195757Ssam#endif 432195757Ssam space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 433195757Ssam } 434195757Ssam if (__predict_true(n != NULL)) { 435195757Ssam m_move_pkthdr(n, m); 436195757Ssam n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 437195757Ssam m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 438195757Ssam n->m_len = pktlen; 439195757Ssam } else { 440195757Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 441195757Ssam mtod(m, const struct ieee80211_frame *), NULL, 442195757Ssam "%s", "no mbuf to realign"); 443195757Ssam vap->iv_stats.is_rx_badalign++; 444195757Ssam } 445195757Ssam m_freem(m); 446195757Ssam return n; 447195757Ssam} 448195757Ssam 449170530Ssamint 450170530Ssamieee80211_add_callback(struct mbuf *m, 451170530Ssam void (*func)(struct ieee80211_node *, void *, int), void *arg) 452170530Ssam{ 453170530Ssam struct m_tag *mtag; 454170530Ssam struct ieee80211_cb *cb; 455170530Ssam 456170530Ssam mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 457170530Ssam sizeof(struct ieee80211_cb), M_NOWAIT); 458170530Ssam if (mtag == NULL) 459170530Ssam return 0; 460170530Ssam 461170530Ssam cb = (struct ieee80211_cb *)(mtag+1); 462170530Ssam cb->func = func; 463170530Ssam cb->arg = arg; 464170530Ssam m_tag_prepend(m, mtag); 465170530Ssam m->m_flags |= M_TXCB; 466170530Ssam return 1; 467170530Ssam} 468170530Ssam 469170530Ssamvoid 470170530Ssamieee80211_process_callback(struct ieee80211_node *ni, 471170530Ssam struct mbuf *m, int status) 472170530Ssam{ 473170530Ssam struct m_tag *mtag; 474170530Ssam 475170530Ssam mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 476170530Ssam if (mtag != NULL) { 477170530Ssam struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 478170530Ssam cb->func(ni, cb->arg, status); 479170530Ssam } 480170530Ssam} 481170530Ssam 482138568Ssam#include <sys/libkern.h> 483138568Ssam 484138568Ssamvoid 485138568Ssamget_random_bytes(void *p, size_t n) 486138568Ssam{ 487170530Ssam uint8_t *dp = p; 488138568Ssam 489138568Ssam while (n > 0) { 490170530Ssam uint32_t v = arc4random(); 491170530Ssam size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 492170530Ssam bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 493170530Ssam dp += sizeof(uint32_t), n -= nb; 494138568Ssam } 495138568Ssam} 496138568Ssam 497178354Ssam/* 498178354Ssam * Helper function for events that pass just a single mac address. 499178354Ssam */ 500178354Ssamstatic void 501178354Ssamnotify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 502138568Ssam{ 503138568Ssam struct ieee80211_join_event iev; 504138568Ssam 505191816Szec CURVNET_SET(ifp->if_vnet); 506144302Ssam memset(&iev, 0, sizeof(iev)); 507178354Ssam IEEE80211_ADDR_COPY(iev.iev_addr, mac); 508178354Ssam rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 509191816Szec CURVNET_RESTORE(); 510178354Ssam} 511178354Ssam 512178354Ssamvoid 513178354Ssamieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 514178354Ssam{ 515178354Ssam struct ieee80211vap *vap = ni->ni_vap; 516178354Ssam struct ifnet *ifp = vap->iv_ifp; 517178354Ssam 518191816Szec CURVNET_SET_QUIET(ifp->if_vnet); 519178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 520178354Ssam (ni == vap->iv_bss) ? "bss " : ""); 521178354Ssam 522178354Ssam if (ni == vap->iv_bss) { 523178354Ssam notify_macaddr(ifp, newassoc ? 524178354Ssam RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 525138568Ssam if_link_state_change(ifp, LINK_STATE_UP); 526144302Ssam } else { 527178354Ssam notify_macaddr(ifp, newassoc ? 528178354Ssam RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 529138568Ssam } 530191816Szec CURVNET_RESTORE(); 531138568Ssam} 532138568Ssam 533138568Ssamvoid 534178354Ssamieee80211_notify_node_leave(struct ieee80211_node *ni) 535138568Ssam{ 536178354Ssam struct ieee80211vap *vap = ni->ni_vap; 537178354Ssam struct ifnet *ifp = vap->iv_ifp; 538138568Ssam 539191816Szec CURVNET_SET_QUIET(ifp->if_vnet); 540178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 541178354Ssam (ni == vap->iv_bss) ? "bss " : ""); 542178354Ssam 543178354Ssam if (ni == vap->iv_bss) { 544138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 545138568Ssam if_link_state_change(ifp, LINK_STATE_DOWN); 546138568Ssam } else { 547138568Ssam /* fire off wireless event station leaving */ 548178354Ssam notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 549138568Ssam } 550191816Szec CURVNET_RESTORE(); 551138568Ssam} 552138568Ssam 553138568Ssamvoid 554178354Ssamieee80211_notify_scan_done(struct ieee80211vap *vap) 555138568Ssam{ 556178354Ssam struct ifnet *ifp = vap->iv_ifp; 557138568Ssam 558178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 559138568Ssam 560138568Ssam /* dispatch wireless event indicating scan completed */ 561191816Szec CURVNET_SET(ifp->if_vnet); 562138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 563191816Szec CURVNET_RESTORE(); 564138568Ssam} 565138568Ssam 566138568Ssamvoid 567178354Ssamieee80211_notify_replay_failure(struct ieee80211vap *vap, 568138568Ssam const struct ieee80211_frame *wh, const struct ieee80211_key *k, 569193541Ssam u_int64_t rsc, int tid) 570138568Ssam{ 571178354Ssam struct ifnet *ifp = vap->iv_ifp; 572138568Ssam 573178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 574226885Sadrian "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 575233531Sadrian k->wk_cipher->ic_name, tid, (intmax_t) rsc, 576193541Ssam (intmax_t) k->wk_keyrsc[tid], 577148863Ssam k->wk_keyix, k->wk_rxkeyix); 578138568Ssam 579138568Ssam if (ifp != NULL) { /* NB: for cipher test modules */ 580138568Ssam struct ieee80211_replay_event iev; 581138568Ssam 582138568Ssam IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 583138568Ssam IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 584138568Ssam iev.iev_cipher = k->wk_cipher->ic_cipher; 585148863Ssam if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 586148863Ssam iev.iev_keyix = k->wk_rxkeyix; 587148863Ssam else 588148863Ssam iev.iev_keyix = k->wk_keyix; 589193541Ssam iev.iev_keyrsc = k->wk_keyrsc[tid]; 590138568Ssam iev.iev_rsc = rsc; 591191816Szec CURVNET_SET(ifp->if_vnet); 592138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 593191816Szec CURVNET_RESTORE(); 594138568Ssam } 595138568Ssam} 596138568Ssam 597138568Ssamvoid 598178354Ssamieee80211_notify_michael_failure(struct ieee80211vap *vap, 599138568Ssam const struct ieee80211_frame *wh, u_int keyix) 600138568Ssam{ 601178354Ssam struct ifnet *ifp = vap->iv_ifp; 602138568Ssam 603178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 604178354Ssam "michael MIC verification failed <keyix %u>", keyix); 605178354Ssam vap->iv_stats.is_rx_tkipmic++; 606138568Ssam 607138568Ssam if (ifp != NULL) { /* NB: for cipher test modules */ 608138568Ssam struct ieee80211_michael_event iev; 609138568Ssam 610138568Ssam IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 611138568Ssam IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 612138568Ssam iev.iev_cipher = IEEE80211_CIPHER_TKIP; 613138568Ssam iev.iev_keyix = keyix; 614191816Szec CURVNET_SET(ifp->if_vnet); 615138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 616191816Szec CURVNET_RESTORE(); 617138568Ssam } 618138568Ssam} 619138568Ssam 620138568Ssamvoid 621178354Ssamieee80211_notify_wds_discover(struct ieee80211_node *ni) 622178354Ssam{ 623178354Ssam struct ieee80211vap *vap = ni->ni_vap; 624178354Ssam struct ifnet *ifp = vap->iv_ifp; 625178354Ssam 626178354Ssam notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 627178354Ssam} 628178354Ssam 629178354Ssamvoid 630178354Ssamieee80211_notify_csa(struct ieee80211com *ic, 631178354Ssam const struct ieee80211_channel *c, int mode, int count) 632178354Ssam{ 633178354Ssam struct ifnet *ifp = ic->ic_ifp; 634178354Ssam struct ieee80211_csa_event iev; 635178354Ssam 636178354Ssam memset(&iev, 0, sizeof(iev)); 637178354Ssam iev.iev_flags = c->ic_flags; 638178354Ssam iev.iev_freq = c->ic_freq; 639178354Ssam iev.iev_ieee = c->ic_ieee; 640178354Ssam iev.iev_mode = mode; 641178354Ssam iev.iev_count = count; 642178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 643178354Ssam} 644178354Ssam 645178354Ssamvoid 646178354Ssamieee80211_notify_radar(struct ieee80211com *ic, 647178354Ssam const struct ieee80211_channel *c) 648178354Ssam{ 649178354Ssam struct ifnet *ifp = ic->ic_ifp; 650178354Ssam struct ieee80211_radar_event iev; 651178354Ssam 652178354Ssam memset(&iev, 0, sizeof(iev)); 653178354Ssam iev.iev_flags = c->ic_flags; 654178354Ssam iev.iev_freq = c->ic_freq; 655178354Ssam iev.iev_ieee = c->ic_ieee; 656178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 657178354Ssam} 658178354Ssam 659178354Ssamvoid 660178354Ssamieee80211_notify_cac(struct ieee80211com *ic, 661178354Ssam const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 662178354Ssam{ 663178354Ssam struct ifnet *ifp = ic->ic_ifp; 664178354Ssam struct ieee80211_cac_event iev; 665178354Ssam 666178354Ssam memset(&iev, 0, sizeof(iev)); 667178354Ssam iev.iev_flags = c->ic_flags; 668178354Ssam iev.iev_freq = c->ic_freq; 669178354Ssam iev.iev_ieee = c->ic_ieee; 670178354Ssam iev.iev_type = type; 671178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 672178354Ssam} 673178354Ssam 674178354Ssamvoid 675178354Ssamieee80211_notify_node_deauth(struct ieee80211_node *ni) 676178354Ssam{ 677178354Ssam struct ieee80211vap *vap = ni->ni_vap; 678178354Ssam struct ifnet *ifp = vap->iv_ifp; 679178354Ssam 680178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 681178354Ssam 682178354Ssam notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 683178354Ssam} 684178354Ssam 685178354Ssamvoid 686178354Ssamieee80211_notify_node_auth(struct ieee80211_node *ni) 687178354Ssam{ 688178354Ssam struct ieee80211vap *vap = ni->ni_vap; 689178354Ssam struct ifnet *ifp = vap->iv_ifp; 690178354Ssam 691178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 692178354Ssam 693178354Ssam notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 694178354Ssam} 695178354Ssam 696178354Ssamvoid 697178354Ssamieee80211_notify_country(struct ieee80211vap *vap, 698178354Ssam const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 699178354Ssam{ 700178354Ssam struct ifnet *ifp = vap->iv_ifp; 701178354Ssam struct ieee80211_country_event iev; 702178354Ssam 703178354Ssam memset(&iev, 0, sizeof(iev)); 704178354Ssam IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 705178354Ssam iev.iev_cc[0] = cc[0]; 706178354Ssam iev.iev_cc[1] = cc[1]; 707178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 708178354Ssam} 709178354Ssam 710178354Ssamvoid 711178354Ssamieee80211_notify_radio(struct ieee80211com *ic, int state) 712178354Ssam{ 713178354Ssam struct ifnet *ifp = ic->ic_ifp; 714178354Ssam struct ieee80211_radio_event iev; 715178354Ssam 716178354Ssam memset(&iev, 0, sizeof(iev)); 717178354Ssam iev.iev_state = state; 718178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 719178354Ssam} 720178354Ssam 721178354Ssamvoid 722138568Ssamieee80211_load_module(const char *modname) 723138568Ssam{ 724159590Sjhb 725138777Ssam#ifdef notyet 726159590Sjhb (void)kern_kldload(curthread, modname, NULL); 727138777Ssam#else 728138777Ssam printf("%s: load the %s module by hand for now.\n", __func__, modname); 729138777Ssam#endif 730138568Ssam} 731138568Ssam 732192468Ssamstatic eventhandler_tag wlan_bpfevent; 733202612Sthompsastatic eventhandler_tag wlan_ifllevent; 734192468Ssam 735192468Ssamstatic void 736192764Ssambpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 737192468Ssam{ 738192468Ssam /* NB: identify vap's by if_start */ 739192764Ssam if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) { 740192468Ssam struct ieee80211vap *vap = ifp->if_softc; 741192468Ssam /* 742192468Ssam * Track bpf radiotap listener state. We mark the vap 743192468Ssam * to indicate if any listener is present and the com 744192468Ssam * to indicate if any listener exists on any associated 745192468Ssam * vap. This flag is used by drivers to prepare radiotap 746192468Ssam * state only when needed. 747192468Ssam */ 748193292Ssam if (attach) { 749192468Ssam ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 750193292Ssam if (vap->iv_opmode == IEEE80211_M_MONITOR) 751193292Ssam atomic_add_int(&vap->iv_ic->ic_montaps, 1); 752193312Ssam } else if (!bpf_peers_present(vap->iv_rawbpf)) { 753192468Ssam ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 754193292Ssam if (vap->iv_opmode == IEEE80211_M_MONITOR) 755193292Ssam atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 756193292Ssam } 757192468Ssam } 758192468Ssam} 759192468Ssam 760202612Sthompsastatic void 761202612Sthompsawlan_iflladdr(void *arg __unused, struct ifnet *ifp) 762202612Sthompsa{ 763202612Sthompsa struct ieee80211com *ic = ifp->if_l2com; 764202612Sthompsa struct ieee80211vap *vap, *next; 765202612Sthompsa 766202612Sthompsa if (ifp->if_type != IFT_IEEE80211 || ic == NULL) 767202612Sthompsa return; 768202612Sthompsa 769202612Sthompsa IEEE80211_LOCK(ic); 770202612Sthompsa TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) { 771202612Sthompsa /* 772202612Sthompsa * If the MAC address has changed on the parent and it was 773202612Sthompsa * copied to the vap on creation then re-sync. 774202612Sthompsa */ 775202612Sthompsa if (vap->iv_ic == ic && 776202612Sthompsa (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 777202612Sthompsa IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 778202612Sthompsa IEEE80211_UNLOCK(ic); 779202612Sthompsa if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 780202612Sthompsa IEEE80211_ADDR_LEN); 781202612Sthompsa IEEE80211_LOCK(ic); 782202612Sthompsa } 783202612Sthompsa } 784202612Sthompsa IEEE80211_UNLOCK(ic); 785202612Sthompsa} 786202612Sthompsa 787138568Ssam/* 788138568Ssam * Module glue. 789138568Ssam * 790138568Ssam * NB: the module name is "wlan" for compatibility with NetBSD. 791138568Ssam */ 792138568Ssamstatic int 793138568Ssamwlan_modevent(module_t mod, int type, void *unused) 794138568Ssam{ 795138568Ssam switch (type) { 796138568Ssam case MOD_LOAD: 797138568Ssam if (bootverbose) 798138568Ssam printf("wlan: <802.11 Link Layer>\n"); 799192468Ssam wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 800192468Ssam bpf_track, 0, EVENTHANDLER_PRI_ANY); 801192468Ssam if (wlan_bpfevent == NULL) 802192468Ssam return ENOMEM; 803202612Sthompsa wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 804202612Sthompsa wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 805202612Sthompsa if (wlan_ifllevent == NULL) { 806202612Sthompsa EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 807202612Sthompsa return ENOMEM; 808202612Sthompsa } 809178354Ssam if_clone_attach(&wlan_cloner); 810178354Ssam if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 811138568Ssam return 0; 812138568Ssam case MOD_UNLOAD: 813178354Ssam if_deregister_com_alloc(IFT_IEEE80211); 814178354Ssam if_clone_detach(&wlan_cloner); 815192468Ssam EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 816202612Sthompsa EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 817138568Ssam return 0; 818138568Ssam } 819138568Ssam return EINVAL; 820138568Ssam} 821138568Ssam 822138568Ssamstatic moduledata_t wlan_mod = { 823138568Ssam "wlan", 824138568Ssam wlan_modevent, 825241394Skevlo 0 826138568Ssam}; 827138568SsamDECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 828138568SsamMODULE_VERSION(wlan, 1); 829138568SsamMODULE_DEPEND(wlan, ether, 1, 1, 1); 830233050Sadrian#ifdef IEEE80211_ALQ 831233050SadrianMODULE_DEPEND(wlan, alq, 1, 1, 1); 832233050Sadrian#endif /* IEEE80211_ALQ */ 833233050Sadrian 834