ieee80211_freebsd.c revision 242149
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 242149 2012-10-26 16:56:55Z adrian $"); 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{ 155242149Sadrian CURVNET_SET(vap->iv_ifp->if_vnet); 156241610Sglebius if_clone_destroyif(wlan_cloner, vap->iv_ifp); 157242149Sadrian CURVNET_RESTORE(); 158178354Ssam} 159178354Ssam 160192473Ssamint 161178354Ssamieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 162178354Ssam{ 163178354Ssam int msecs = ticks_to_msecs(*(int *)arg1); 164178354Ssam int error, t; 165178354Ssam 166178354Ssam error = sysctl_handle_int(oidp, &msecs, 0, req); 167173273Ssam if (error || !req->newptr) 168173273Ssam return error; 169178354Ssam t = msecs_to_ticks(msecs); 170178354Ssam *(int *)arg1 = (t < 1) ? 1 : t; 171173273Ssam return 0; 172173273Ssam} 173178354Ssam 174173273Ssamstatic int 175138568Ssamieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 176138568Ssam{ 177138568Ssam int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; 178138568Ssam int error; 179138568Ssam 180138568Ssam error = sysctl_handle_int(oidp, &inact, 0, req); 181138568Ssam if (error || !req->newptr) 182138568Ssam return error; 183138568Ssam *(int *)arg1 = inact / IEEE80211_INACT_WAIT; 184138568Ssam return 0; 185138568Ssam} 186138568Ssam 187138568Ssamstatic int 188138568Ssamieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 189138568Ssam{ 190138568Ssam struct ieee80211com *ic = arg1; 191138568Ssam const char *name = ic->ic_ifp->if_xname; 192138568Ssam 193138568Ssam return SYSCTL_OUT(req, name, strlen(name)); 194138568Ssam} 195138568Ssam 196181194Ssamstatic int 197181194Ssamieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 198181194Ssam{ 199181194Ssam struct ieee80211com *ic = arg1; 200181194Ssam int t = 0, error; 201181194Ssam 202181194Ssam error = sysctl_handle_int(oidp, &t, 0, req); 203181194Ssam if (error || !req->newptr) 204181194Ssam return error; 205181194Ssam IEEE80211_LOCK(ic); 206181194Ssam ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 207181194Ssam IEEE80211_UNLOCK(ic); 208181194Ssam return 0; 209181194Ssam} 210181194Ssam 211138568Ssamvoid 212138568Ssamieee80211_sysctl_attach(struct ieee80211com *ic) 213138568Ssam{ 214178354Ssam} 215178354Ssam 216178354Ssamvoid 217178354Ssamieee80211_sysctl_detach(struct ieee80211com *ic) 218178354Ssam{ 219178354Ssam} 220178354Ssam 221178354Ssamvoid 222178354Ssamieee80211_sysctl_vattach(struct ieee80211vap *vap) 223178354Ssam{ 224178354Ssam struct ifnet *ifp = vap->iv_ifp; 225138568Ssam struct sysctl_ctx_list *ctx; 226138568Ssam struct sysctl_oid *oid; 227138568Ssam char num[14]; /* sufficient for 32 bits */ 228138568Ssam 229186302Ssam ctx = (struct sysctl_ctx_list *) malloc(sizeof(struct sysctl_ctx_list), 230138568Ssam M_DEVBUF, M_NOWAIT | M_ZERO); 231138568Ssam if (ctx == NULL) { 232178354Ssam if_printf(ifp, "%s: cannot allocate sysctl context!\n", 233138568Ssam __func__); 234138568Ssam return; 235138568Ssam } 236138568Ssam sysctl_ctx_init(ctx); 237178354Ssam snprintf(num, sizeof(num), "%u", ifp->if_dunit); 238138568Ssam oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 239138568Ssam OID_AUTO, num, CTLFLAG_RD, NULL, ""); 240138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 241217554Smdf "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0, 242178354Ssam ieee80211_sysctl_parent, "A", "parent device"); 243217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 244178354Ssam "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 245178354Ssam "driver capabilities"); 246138568Ssam#ifdef IEEE80211_DEBUG 247178354Ssam vap->iv_debug = ieee80211_debug; 248217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 249178354Ssam "debug", CTLFLAG_RW, &vap->iv_debug, 0, 250138568Ssam "control debugging printfs"); 251138568Ssam#endif 252178354Ssam SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 253178354Ssam "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 254178354Ssam "consecutive beacon misses before scanning"); 255138568Ssam /* XXX inherit from tunables */ 256138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 257178354Ssam "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0, 258138568Ssam ieee80211_sysctl_inact, "I", 259138568Ssam "station inactivity timeout (sec)"); 260138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 261178354Ssam "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0, 262138568Ssam ieee80211_sysctl_inact, "I", 263138568Ssam "station inactivity probe timeout (sec)"); 264138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 265178354Ssam "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0, 266138568Ssam ieee80211_sysctl_inact, "I", 267138568Ssam "station authentication timeout (sec)"); 268138568Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 269178354Ssam "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0, 270138568Ssam ieee80211_sysctl_inact, "I", 271138568Ssam "station initial state timeout (sec)"); 272178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_HT) { 273217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 274178354Ssam "ampdu_mintraffic_bk", CTLFLAG_RW, 275178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 276178354Ssam "BK traffic tx aggr threshold (pps)"); 277217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 278178354Ssam "ampdu_mintraffic_be", CTLFLAG_RW, 279178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 280178354Ssam "BE traffic tx aggr threshold (pps)"); 281217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 282178354Ssam "ampdu_mintraffic_vo", CTLFLAG_RW, 283178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 284178354Ssam "VO traffic tx aggr threshold (pps)"); 285217322Smdf SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 286178354Ssam "ampdu_mintraffic_vi", CTLFLAG_RW, 287178354Ssam &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 288178354Ssam "VI traffic tx aggr threshold (pps)"); 289178354Ssam } 290181194Ssam if (vap->iv_caps & IEEE80211_C_DFS) { 291181194Ssam SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 292181194Ssam "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0, 293193115Ssam ieee80211_sysctl_radar, "I", "simulate radar event"); 294181194Ssam } 295178354Ssam vap->iv_sysctl = ctx; 296178354Ssam vap->iv_oid = oid; 297138568Ssam} 298138568Ssam 299138568Ssamvoid 300178354Ssamieee80211_sysctl_vdetach(struct ieee80211vap *vap) 301138568Ssam{ 302138568Ssam 303178354Ssam if (vap->iv_sysctl != NULL) { 304178354Ssam sysctl_ctx_free(vap->iv_sysctl); 305186302Ssam free(vap->iv_sysctl, M_DEVBUF); 306178354Ssam vap->iv_sysctl = NULL; 307138568Ssam } 308138568Ssam} 309138568Ssam 310138568Ssamint 311138568Ssamieee80211_node_dectestref(struct ieee80211_node *ni) 312138568Ssam{ 313138568Ssam /* XXX need equivalent of atomic_dec_and_test */ 314138568Ssam atomic_subtract_int(&ni->ni_refcnt, 1); 315138568Ssam return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 316138568Ssam} 317138568Ssam 318165894Ssamvoid 319165894Ssamieee80211_drain_ifq(struct ifqueue *ifq) 320165894Ssam{ 321165894Ssam struct ieee80211_node *ni; 322165894Ssam struct mbuf *m; 323165894Ssam 324165894Ssam for (;;) { 325165894Ssam IF_DEQUEUE(ifq, m); 326165894Ssam if (m == NULL) 327165894Ssam break; 328165894Ssam 329165894Ssam ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 330165894Ssam KASSERT(ni != NULL, ("frame w/o node")); 331165894Ssam ieee80211_free_node(ni); 332165894Ssam m->m_pkthdr.rcvif = NULL; 333165894Ssam 334165894Ssam m_freem(m); 335165894Ssam } 336165894Ssam} 337165894Ssam 338178354Ssamvoid 339178354Ssamieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) 340178354Ssam{ 341178354Ssam struct ieee80211_node *ni; 342178354Ssam struct mbuf *m, **mprev; 343178354Ssam 344178354Ssam IF_LOCK(ifq); 345178354Ssam mprev = &ifq->ifq_head; 346178354Ssam while ((m = *mprev) != NULL) { 347178354Ssam ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; 348178354Ssam if (ni != NULL && ni->ni_vap == vap) { 349178354Ssam *mprev = m->m_nextpkt; /* remove from list */ 350178354Ssam ifq->ifq_len--; 351178354Ssam 352178354Ssam m_freem(m); 353178354Ssam ieee80211_free_node(ni); /* reclaim ref */ 354178354Ssam } else 355178354Ssam mprev = &m->m_nextpkt; 356178354Ssam } 357178354Ssam /* recalculate tail ptr */ 358178354Ssam m = ifq->ifq_head; 359178354Ssam for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 360178354Ssam ; 361178354Ssam ifq->ifq_tail = m; 362178354Ssam IF_UNLOCK(ifq); 363178354Ssam} 364178354Ssam 365138568Ssam/* 366170530Ssam * As above, for mbufs allocated with m_gethdr/MGETHDR 367170530Ssam * or initialized by M_COPY_PKTHDR. 368170530Ssam */ 369170530Ssam#define MC_ALIGN(m, len) \ 370170530Ssamdo { \ 371170530Ssam (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 372170530Ssam} while (/* CONSTCOND */ 0) 373170530Ssam 374170530Ssam/* 375138568Ssam * Allocate and setup a management frame of the specified 376138568Ssam * size. We return the mbuf and a pointer to the start 377138568Ssam * of the contiguous data area that's been reserved based 378138568Ssam * on the packet length. The data area is forced to 32-bit 379138568Ssam * alignment and the buffer length to a multiple of 4 bytes. 380138568Ssam * This is done mainly so beacon frames (that require this) 381138568Ssam * can use this interface too. 382138568Ssam */ 383138568Ssamstruct mbuf * 384170530Ssamieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) 385138568Ssam{ 386138568Ssam struct mbuf *m; 387138568Ssam u_int len; 388138568Ssam 389138568Ssam /* 390138568Ssam * NB: we know the mbuf routines will align the data area 391138568Ssam * so we don't need to do anything special. 392138568Ssam */ 393170530Ssam len = roundup2(headroom + pktlen, 4); 394138568Ssam KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 395138568Ssam if (len < MINCLSIZE) { 396151967Sandre m = m_gethdr(M_NOWAIT, MT_DATA); 397138568Ssam /* 398138568Ssam * Align the data in case additional headers are added. 399138568Ssam * This should only happen when a WEP header is added 400138568Ssam * which only happens for shared key authentication mgt 401138568Ssam * frames which all fit in MHLEN. 402138568Ssam */ 403138568Ssam if (m != NULL) 404138568Ssam MH_ALIGN(m, len); 405170530Ssam } else { 406151967Sandre m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 407170530Ssam if (m != NULL) 408170530Ssam MC_ALIGN(m, len); 409170530Ssam } 410138568Ssam if (m != NULL) { 411171984Ssephe m->m_data += headroom; 412138568Ssam *frm = m->m_data; 413138568Ssam } 414138568Ssam return m; 415138568Ssam} 416138568Ssam 417195757Ssam/* 418195757Ssam * Re-align the payload in the mbuf. This is mainly used (right now) 419195757Ssam * to handle IP header alignment requirements on certain architectures. 420195757Ssam */ 421195757Ssamstruct mbuf * 422195757Ssamieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) 423195757Ssam{ 424195757Ssam int pktlen, space; 425195757Ssam struct mbuf *n; 426195757Ssam 427195757Ssam pktlen = m->m_pkthdr.len; 428195757Ssam space = pktlen + align; 429195757Ssam if (space < MINCLSIZE) 430195757Ssam n = m_gethdr(M_DONTWAIT, MT_DATA); 431195757Ssam else { 432195757Ssam n = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, 433195757Ssam space <= MCLBYTES ? MCLBYTES : 434195757Ssam#if MJUMPAGESIZE != MCLBYTES 435195757Ssam space <= MJUMPAGESIZE ? MJUMPAGESIZE : 436195757Ssam#endif 437195757Ssam space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 438195757Ssam } 439195757Ssam if (__predict_true(n != NULL)) { 440195757Ssam m_move_pkthdr(n, m); 441195757Ssam n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 442195757Ssam m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 443195757Ssam n->m_len = pktlen; 444195757Ssam } else { 445195757Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 446195757Ssam mtod(m, const struct ieee80211_frame *), NULL, 447195757Ssam "%s", "no mbuf to realign"); 448195757Ssam vap->iv_stats.is_rx_badalign++; 449195757Ssam } 450195757Ssam m_freem(m); 451195757Ssam return n; 452195757Ssam} 453195757Ssam 454170530Ssamint 455170530Ssamieee80211_add_callback(struct mbuf *m, 456170530Ssam void (*func)(struct ieee80211_node *, void *, int), void *arg) 457170530Ssam{ 458170530Ssam struct m_tag *mtag; 459170530Ssam struct ieee80211_cb *cb; 460170530Ssam 461170530Ssam mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 462170530Ssam sizeof(struct ieee80211_cb), M_NOWAIT); 463170530Ssam if (mtag == NULL) 464170530Ssam return 0; 465170530Ssam 466170530Ssam cb = (struct ieee80211_cb *)(mtag+1); 467170530Ssam cb->func = func; 468170530Ssam cb->arg = arg; 469170530Ssam m_tag_prepend(m, mtag); 470170530Ssam m->m_flags |= M_TXCB; 471170530Ssam return 1; 472170530Ssam} 473170530Ssam 474170530Ssamvoid 475170530Ssamieee80211_process_callback(struct ieee80211_node *ni, 476170530Ssam struct mbuf *m, int status) 477170530Ssam{ 478170530Ssam struct m_tag *mtag; 479170530Ssam 480170530Ssam mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 481170530Ssam if (mtag != NULL) { 482170530Ssam struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); 483170530Ssam cb->func(ni, cb->arg, status); 484170530Ssam } 485170530Ssam} 486170530Ssam 487138568Ssam#include <sys/libkern.h> 488138568Ssam 489138568Ssamvoid 490138568Ssamget_random_bytes(void *p, size_t n) 491138568Ssam{ 492170530Ssam uint8_t *dp = p; 493138568Ssam 494138568Ssam while (n > 0) { 495170530Ssam uint32_t v = arc4random(); 496170530Ssam size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 497170530Ssam bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 498170530Ssam dp += sizeof(uint32_t), n -= nb; 499138568Ssam } 500138568Ssam} 501138568Ssam 502178354Ssam/* 503178354Ssam * Helper function for events that pass just a single mac address. 504178354Ssam */ 505178354Ssamstatic void 506178354Ssamnotify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 507138568Ssam{ 508138568Ssam struct ieee80211_join_event iev; 509138568Ssam 510191816Szec CURVNET_SET(ifp->if_vnet); 511144302Ssam memset(&iev, 0, sizeof(iev)); 512178354Ssam IEEE80211_ADDR_COPY(iev.iev_addr, mac); 513178354Ssam rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 514191816Szec CURVNET_RESTORE(); 515178354Ssam} 516178354Ssam 517178354Ssamvoid 518178354Ssamieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) 519178354Ssam{ 520178354Ssam struct ieee80211vap *vap = ni->ni_vap; 521178354Ssam struct ifnet *ifp = vap->iv_ifp; 522178354Ssam 523191816Szec CURVNET_SET_QUIET(ifp->if_vnet); 524178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 525178354Ssam (ni == vap->iv_bss) ? "bss " : ""); 526178354Ssam 527178354Ssam if (ni == vap->iv_bss) { 528178354Ssam notify_macaddr(ifp, newassoc ? 529178354Ssam RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 530138568Ssam if_link_state_change(ifp, LINK_STATE_UP); 531144302Ssam } else { 532178354Ssam notify_macaddr(ifp, newassoc ? 533178354Ssam RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 534138568Ssam } 535191816Szec CURVNET_RESTORE(); 536138568Ssam} 537138568Ssam 538138568Ssamvoid 539178354Ssamieee80211_notify_node_leave(struct ieee80211_node *ni) 540138568Ssam{ 541178354Ssam struct ieee80211vap *vap = ni->ni_vap; 542178354Ssam struct ifnet *ifp = vap->iv_ifp; 543138568Ssam 544191816Szec CURVNET_SET_QUIET(ifp->if_vnet); 545178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 546178354Ssam (ni == vap->iv_bss) ? "bss " : ""); 547178354Ssam 548178354Ssam if (ni == vap->iv_bss) { 549138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 550138568Ssam if_link_state_change(ifp, LINK_STATE_DOWN); 551138568Ssam } else { 552138568Ssam /* fire off wireless event station leaving */ 553178354Ssam notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 554138568Ssam } 555191816Szec CURVNET_RESTORE(); 556138568Ssam} 557138568Ssam 558138568Ssamvoid 559178354Ssamieee80211_notify_scan_done(struct ieee80211vap *vap) 560138568Ssam{ 561178354Ssam struct ifnet *ifp = vap->iv_ifp; 562138568Ssam 563178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 564138568Ssam 565138568Ssam /* dispatch wireless event indicating scan completed */ 566191816Szec CURVNET_SET(ifp->if_vnet); 567138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 568191816Szec CURVNET_RESTORE(); 569138568Ssam} 570138568Ssam 571138568Ssamvoid 572178354Ssamieee80211_notify_replay_failure(struct ieee80211vap *vap, 573138568Ssam const struct ieee80211_frame *wh, const struct ieee80211_key *k, 574193541Ssam u_int64_t rsc, int tid) 575138568Ssam{ 576178354Ssam struct ifnet *ifp = vap->iv_ifp; 577138568Ssam 578178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 579226885Sadrian "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 580233531Sadrian k->wk_cipher->ic_name, tid, (intmax_t) rsc, 581193541Ssam (intmax_t) k->wk_keyrsc[tid], 582148863Ssam k->wk_keyix, k->wk_rxkeyix); 583138568Ssam 584138568Ssam if (ifp != NULL) { /* NB: for cipher test modules */ 585138568Ssam struct ieee80211_replay_event iev; 586138568Ssam 587138568Ssam IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 588138568Ssam IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 589138568Ssam iev.iev_cipher = k->wk_cipher->ic_cipher; 590148863Ssam if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 591148863Ssam iev.iev_keyix = k->wk_rxkeyix; 592148863Ssam else 593148863Ssam iev.iev_keyix = k->wk_keyix; 594193541Ssam iev.iev_keyrsc = k->wk_keyrsc[tid]; 595138568Ssam iev.iev_rsc = rsc; 596191816Szec CURVNET_SET(ifp->if_vnet); 597138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 598191816Szec CURVNET_RESTORE(); 599138568Ssam } 600138568Ssam} 601138568Ssam 602138568Ssamvoid 603178354Ssamieee80211_notify_michael_failure(struct ieee80211vap *vap, 604138568Ssam const struct ieee80211_frame *wh, u_int keyix) 605138568Ssam{ 606178354Ssam struct ifnet *ifp = vap->iv_ifp; 607138568Ssam 608178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 609178354Ssam "michael MIC verification failed <keyix %u>", keyix); 610178354Ssam vap->iv_stats.is_rx_tkipmic++; 611138568Ssam 612138568Ssam if (ifp != NULL) { /* NB: for cipher test modules */ 613138568Ssam struct ieee80211_michael_event iev; 614138568Ssam 615138568Ssam IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 616138568Ssam IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 617138568Ssam iev.iev_cipher = IEEE80211_CIPHER_TKIP; 618138568Ssam iev.iev_keyix = keyix; 619191816Szec CURVNET_SET(ifp->if_vnet); 620138568Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 621191816Szec CURVNET_RESTORE(); 622138568Ssam } 623138568Ssam} 624138568Ssam 625138568Ssamvoid 626178354Ssamieee80211_notify_wds_discover(struct ieee80211_node *ni) 627178354Ssam{ 628178354Ssam struct ieee80211vap *vap = ni->ni_vap; 629178354Ssam struct ifnet *ifp = vap->iv_ifp; 630178354Ssam 631178354Ssam notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 632178354Ssam} 633178354Ssam 634178354Ssamvoid 635178354Ssamieee80211_notify_csa(struct ieee80211com *ic, 636178354Ssam const struct ieee80211_channel *c, int mode, int count) 637178354Ssam{ 638178354Ssam struct ifnet *ifp = ic->ic_ifp; 639178354Ssam struct ieee80211_csa_event iev; 640178354Ssam 641178354Ssam memset(&iev, 0, sizeof(iev)); 642178354Ssam iev.iev_flags = c->ic_flags; 643178354Ssam iev.iev_freq = c->ic_freq; 644178354Ssam iev.iev_ieee = c->ic_ieee; 645178354Ssam iev.iev_mode = mode; 646178354Ssam iev.iev_count = count; 647178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 648178354Ssam} 649178354Ssam 650178354Ssamvoid 651178354Ssamieee80211_notify_radar(struct ieee80211com *ic, 652178354Ssam const struct ieee80211_channel *c) 653178354Ssam{ 654178354Ssam struct ifnet *ifp = ic->ic_ifp; 655178354Ssam struct ieee80211_radar_event iev; 656178354Ssam 657178354Ssam memset(&iev, 0, sizeof(iev)); 658178354Ssam iev.iev_flags = c->ic_flags; 659178354Ssam iev.iev_freq = c->ic_freq; 660178354Ssam iev.iev_ieee = c->ic_ieee; 661178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 662178354Ssam} 663178354Ssam 664178354Ssamvoid 665178354Ssamieee80211_notify_cac(struct ieee80211com *ic, 666178354Ssam const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) 667178354Ssam{ 668178354Ssam struct ifnet *ifp = ic->ic_ifp; 669178354Ssam struct ieee80211_cac_event iev; 670178354Ssam 671178354Ssam memset(&iev, 0, sizeof(iev)); 672178354Ssam iev.iev_flags = c->ic_flags; 673178354Ssam iev.iev_freq = c->ic_freq; 674178354Ssam iev.iev_ieee = c->ic_ieee; 675178354Ssam iev.iev_type = type; 676178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 677178354Ssam} 678178354Ssam 679178354Ssamvoid 680178354Ssamieee80211_notify_node_deauth(struct ieee80211_node *ni) 681178354Ssam{ 682178354Ssam struct ieee80211vap *vap = ni->ni_vap; 683178354Ssam struct ifnet *ifp = vap->iv_ifp; 684178354Ssam 685178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 686178354Ssam 687178354Ssam notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 688178354Ssam} 689178354Ssam 690178354Ssamvoid 691178354Ssamieee80211_notify_node_auth(struct ieee80211_node *ni) 692178354Ssam{ 693178354Ssam struct ieee80211vap *vap = ni->ni_vap; 694178354Ssam struct ifnet *ifp = vap->iv_ifp; 695178354Ssam 696178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 697178354Ssam 698178354Ssam notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 699178354Ssam} 700178354Ssam 701178354Ssamvoid 702178354Ssamieee80211_notify_country(struct ieee80211vap *vap, 703178354Ssam const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 704178354Ssam{ 705178354Ssam struct ifnet *ifp = vap->iv_ifp; 706178354Ssam struct ieee80211_country_event iev; 707178354Ssam 708178354Ssam memset(&iev, 0, sizeof(iev)); 709178354Ssam IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 710178354Ssam iev.iev_cc[0] = cc[0]; 711178354Ssam iev.iev_cc[1] = cc[1]; 712178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 713178354Ssam} 714178354Ssam 715178354Ssamvoid 716178354Ssamieee80211_notify_radio(struct ieee80211com *ic, int state) 717178354Ssam{ 718178354Ssam struct ifnet *ifp = ic->ic_ifp; 719178354Ssam struct ieee80211_radio_event iev; 720178354Ssam 721178354Ssam memset(&iev, 0, sizeof(iev)); 722178354Ssam iev.iev_state = state; 723178354Ssam rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 724178354Ssam} 725178354Ssam 726178354Ssamvoid 727138568Ssamieee80211_load_module(const char *modname) 728138568Ssam{ 729159590Sjhb 730138777Ssam#ifdef notyet 731159590Sjhb (void)kern_kldload(curthread, modname, NULL); 732138777Ssam#else 733138777Ssam printf("%s: load the %s module by hand for now.\n", __func__, modname); 734138777Ssam#endif 735138568Ssam} 736138568Ssam 737192468Ssamstatic eventhandler_tag wlan_bpfevent; 738202612Sthompsastatic eventhandler_tag wlan_ifllevent; 739192468Ssam 740192468Ssamstatic void 741192764Ssambpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) 742192468Ssam{ 743192468Ssam /* NB: identify vap's by if_start */ 744192764Ssam if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) { 745192468Ssam struct ieee80211vap *vap = ifp->if_softc; 746192468Ssam /* 747192468Ssam * Track bpf radiotap listener state. We mark the vap 748192468Ssam * to indicate if any listener is present and the com 749192468Ssam * to indicate if any listener exists on any associated 750192468Ssam * vap. This flag is used by drivers to prepare radiotap 751192468Ssam * state only when needed. 752192468Ssam */ 753193292Ssam if (attach) { 754192468Ssam ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 755193292Ssam if (vap->iv_opmode == IEEE80211_M_MONITOR) 756193292Ssam atomic_add_int(&vap->iv_ic->ic_montaps, 1); 757193312Ssam } else if (!bpf_peers_present(vap->iv_rawbpf)) { 758192468Ssam ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 759193292Ssam if (vap->iv_opmode == IEEE80211_M_MONITOR) 760193292Ssam atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 761193292Ssam } 762192468Ssam } 763192468Ssam} 764192468Ssam 765202612Sthompsastatic void 766202612Sthompsawlan_iflladdr(void *arg __unused, struct ifnet *ifp) 767202612Sthompsa{ 768202612Sthompsa struct ieee80211com *ic = ifp->if_l2com; 769202612Sthompsa struct ieee80211vap *vap, *next; 770202612Sthompsa 771202612Sthompsa if (ifp->if_type != IFT_IEEE80211 || ic == NULL) 772202612Sthompsa return; 773202612Sthompsa 774202612Sthompsa IEEE80211_LOCK(ic); 775202612Sthompsa TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) { 776202612Sthompsa /* 777202612Sthompsa * If the MAC address has changed on the parent and it was 778202612Sthompsa * copied to the vap on creation then re-sync. 779202612Sthompsa */ 780202612Sthompsa if (vap->iv_ic == ic && 781202612Sthompsa (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 782202612Sthompsa IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 783202612Sthompsa IEEE80211_UNLOCK(ic); 784202612Sthompsa if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 785202612Sthompsa IEEE80211_ADDR_LEN); 786202612Sthompsa IEEE80211_LOCK(ic); 787202612Sthompsa } 788202612Sthompsa } 789202612Sthompsa IEEE80211_UNLOCK(ic); 790202612Sthompsa} 791202612Sthompsa 792138568Ssam/* 793138568Ssam * Module glue. 794138568Ssam * 795138568Ssam * NB: the module name is "wlan" for compatibility with NetBSD. 796138568Ssam */ 797138568Ssamstatic int 798138568Ssamwlan_modevent(module_t mod, int type, void *unused) 799138568Ssam{ 800138568Ssam switch (type) { 801138568Ssam case MOD_LOAD: 802138568Ssam if (bootverbose) 803138568Ssam printf("wlan: <802.11 Link Layer>\n"); 804192468Ssam wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 805192468Ssam bpf_track, 0, EVENTHANDLER_PRI_ANY); 806192468Ssam if (wlan_bpfevent == NULL) 807192468Ssam return ENOMEM; 808202612Sthompsa wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 809202612Sthompsa wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 810202612Sthompsa if (wlan_ifllevent == NULL) { 811202612Sthompsa EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 812202612Sthompsa return ENOMEM; 813202612Sthompsa } 814241610Sglebius wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 815241610Sglebius wlan_clone_destroy, 0); 816178354Ssam if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 817138568Ssam return 0; 818138568Ssam case MOD_UNLOAD: 819178354Ssam if_deregister_com_alloc(IFT_IEEE80211); 820241610Sglebius if_clone_detach(wlan_cloner); 821192468Ssam EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 822202612Sthompsa EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 823138568Ssam return 0; 824138568Ssam } 825138568Ssam return EINVAL; 826138568Ssam} 827138568Ssam 828138568Ssamstatic moduledata_t wlan_mod = { 829241610Sglebius wlanname, 830138568Ssam wlan_modevent, 831241394Skevlo 0 832138568Ssam}; 833138568SsamDECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 834138568SsamMODULE_VERSION(wlan, 1); 835138568SsamMODULE_DEPEND(wlan, ether, 1, 1, 1); 836233050Sadrian#ifdef IEEE80211_ALQ 837233050SadrianMODULE_DEPEND(wlan, alq, 1, 1, 1); 838233050Sadrian#endif /* IEEE80211_ALQ */ 839233050Sadrian 840