Cross Reference: /freebsd-10.2-release/sys/net80211/ieee80211

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ieee80211_freebsd.c (241394)	ieee80211_freebsd.c (241610)
1/- 2 Copyright (c) 2003-2009 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h>	1/- 2 Copyright (c) 2003-2009 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_freebsd.c 241394 2012-10-10 08:36:38Z kevlo $");	27__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_freebsd.c 241610 2012-10-16 13:37:54Z glebius $");
28 29/* 30 * IEEE 802.11 support (FreeBSD-specific code) 31 */ 32#include "opt_wlan.h" 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/linker.h> 38#include <sys/mbuf.h> 39#include <sys/module.h> 40#include <sys/proc.h> 41#include <sys/sysctl.h> 42 43#include <sys/socket.h> 44 45#include <net/bpf.h> 46#include <net/if.h> 47#include <net/if_dl.h> 48#include <net/if_clone.h> 49#include <net/if_media.h> 50#include <net/if_types.h> 51#include <net/ethernet.h> 52#include <net/route.h> 53#include <net/vnet.h> 54 55#include <net80211/ieee80211_var.h> 56#include <net80211/ieee80211_input.h> 57 58SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 59 60#ifdef IEEE80211_DEBUG 61int ieee80211_debug = 0; 62SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 63 0, "debugging printfs"); 64#endif 65 66static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 67	28 29/* 30 * IEEE 802.11 support (FreeBSD-specific code) 31 */ 32#include "opt_wlan.h" 33 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/systm.h> 37#include <sys/linker.h> 38#include <sys/mbuf.h> 39#include <sys/module.h> 40#include <sys/proc.h> 41#include <sys/sysctl.h> 42 43#include <sys/socket.h> 44 45#include <net/bpf.h> 46#include <net/if.h> 47#include <net/if_dl.h> 48#include <net/if_clone.h> 49#include <net/if_media.h> 50#include <net/if_types.h> 51#include <net/ethernet.h> 52#include <net/route.h> 53#include <net/vnet.h> 54 55#include <net80211/ieee80211_var.h> 56#include <net80211/ieee80211_input.h> 57 58SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters"); 59 60#ifdef IEEE80211_DEBUG 61int ieee80211_debug = 0; 62SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 63 0, "debugging printfs"); 64#endif 65 66static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state"); 67
	68static const char wlanname[] = "wlan"; 69 70static struct if_clone *wlan_cloner; 71
68/* 69 * Allocate/free com structure in conjunction with ifnet; 70 * these routines are registered with if_register_com_alloc 71 * below and are called automatically by the ifnet code 72 * when the ifnet of the parent device is created. 73 / 74static void 75wlan_alloc(u_char type, struct ifnet ifp) 76{ 77 struct ieee80211com ic; 78 79 ic = malloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK\|M_ZERO); 80 ic->ic_ifp = ifp; 81 82 return (ic); 83} 84 85static void 86wlan_free(void ic, u_char type) 87{ 88 free(ic, M_80211_COM); 89} 90 91static int 92wlan_clone_create(struct if_clone ifc, int unit, caddr_t params) 93{ 94 struct ieee80211_clone_params cp; 95 struct ieee80211vap vap; 96 struct ieee80211com ic; 97 struct ifnet ifp; 98 int error; 99 100* error = copyin(params, &cp, sizeof(cp)); 101 if (error) 102 return error; 103 ifp = ifunit(cp.icp_parent); 104 if (ifp == NULL) 105 return ENXIO; 106 /* XXX move printfs to DIAGNOSTIC before release / 107* if (ifp->if_type != IFT_IEEE80211) { 108 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__); 109 return ENXIO; 110 } 111 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 112 if_printf(ifp, "%s: invalid opmode %d\n", 113 __func__, cp.icp_opmode); 114 return EINVAL; 115 } 116 ic = ifp->if_l2com; 117 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 118 if_printf(ifp, "%s mode not supported\n", 119 ieee80211_opmode_name[cp.icp_opmode]); 120 return EOPNOTSUPP; 121 } 122 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 123#ifdef IEEE80211_SUPPORT_TDMA 124 (ic->ic_caps & IEEE80211_C_TDMA) == 0 125#else 126 (1) 127#endif 128 ) { 129 if_printf(ifp, "TDMA not supported\n"); 130 return EOPNOTSUPP; 131 }	72/* 73 * Allocate/free com structure in conjunction with ifnet; 74 * these routines are registered with if_register_com_alloc 75 * below and are called automatically by the ifnet code 76 * when the ifnet of the parent device is created. 77 / 78static void 79wlan_alloc(u_char type, struct ifnet ifp) 80{ 81 struct ieee80211com ic; 82 83 ic = malloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK\|M_ZERO); 84 ic->ic_ifp = ifp; 85 86 return (ic); 87} 88 89static void 90wlan_free(void ic, u_char type) 91{ 92 free(ic, M_80211_COM); 93} 94 95static int 96wlan_clone_create(struct if_clone ifc, int unit, caddr_t params) 97{ 98 struct ieee80211_clone_params cp; 99 struct ieee80211vap vap; 100* struct ieee80211com ic; 101* struct ifnet ifp; 102* int error; 103 104 error = copyin(params, &cp, sizeof(cp)); 105 if (error) 106 return error; 107 ifp = ifunit(cp.icp_parent); 108 if (ifp == NULL) 109 return ENXIO; 110 /* XXX move printfs to DIAGNOSTIC before release / 111* if (ifp->if_type != IFT_IEEE80211) { 112 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__); 113 return ENXIO; 114 } 115 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { 116 if_printf(ifp, "%s: invalid opmode %d\n", 117 __func__, cp.icp_opmode); 118 return EINVAL; 119 } 120 ic = ifp->if_l2com; 121 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { 122 if_printf(ifp, "%s mode not supported\n", 123 ieee80211_opmode_name[cp.icp_opmode]); 124 return EOPNOTSUPP; 125 } 126 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && 127#ifdef IEEE80211_SUPPORT_TDMA 128 (ic->ic_caps & IEEE80211_C_TDMA) == 0 129#else 130 (1) 131#endif 132 ) { 133 if_printf(ifp, "TDMA not supported\n"); 134 return EOPNOTSUPP; 135 }
132 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit,	136 vap = ic->ic_vap_create(ic, wlanname, unit,
133 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 134 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 135 cp.icp_macaddr : (const uint8_t )IF_LLADDR(ifp)); 136* return (vap == NULL ? EIO : 0); 137} 138 139static void 140wlan_clone_destroy(struct ifnet ifp) 141{ 142* struct ieee80211vap vap = ifp->if_softc; 143* struct ieee80211com ic = vap->iv_ic; 144* 145 ic->ic_vap_delete(vap); 146}	137 cp.icp_opmode, cp.icp_flags, cp.icp_bssid, 138 cp.icp_flags & IEEE80211_CLONE_MACADDR ? 139 cp.icp_macaddr : (const uint8_t )IF_LLADDR(ifp)); 140* return (vap == NULL ? EIO : 0); 141} 142 143static void 144wlan_clone_destroy(struct ifnet ifp) 145{ 146* struct ieee80211vap vap = ifp->if_softc; 147* struct ieee80211com ic = vap->iv_ic; 148* 149 ic->ic_vap_delete(vap); 150}
147IFC_SIMPLE_DECLARE(wlan, 0);
148 149void 150ieee80211_vap_destroy(struct ieee80211vap vap) 151*{	151 152void 153ieee80211_vap_destroy(struct ieee80211vap vap) 154*{
152 if_clone_destroyif(&wlan_cloner, vap->iv_ifp);	155 if_clone_destroyif(wlan_cloner, vap->iv_ifp);
153} 154 155int 156ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 157{ 158 int msecs = ticks_to_msecs((int )arg1); 159 int error, t; 160 161 error = sysctl_handle_int(oidp, &msecs, 0, req); 162 if (error \|\| !req->newptr) 163 return error; 164 t = msecs_to_ticks(msecs); 165 (int )arg1 = (t < 1) ? 1 : t; 166 return 0; 167} 168 169static int 170ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 171{ 172 int inact = ((int )arg1) * IEEE80211_INACT_WAIT; 173 int error; 174 175 error = sysctl_handle_int(oidp, &inact, 0, req); 176 if (error \|\| !req->newptr) 177 return error; 178 (int )arg1 = inact / IEEE80211_INACT_WAIT; 179 return 0; 180} 181 182static int 183ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 184{ 185 struct ieee80211com ic = arg1; 186* const char name = ic->ic_ifp->if_xname; 187* 188 return SYSCTL_OUT(req, name, strlen(name)); 189} 190 191static int 192ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 193{ 194 struct ieee80211com ic = arg1; 195* int t = 0, error; 196 197 error = sysctl_handle_int(oidp, &t, 0, req); 198 if (error \|\| !req->newptr) 199 return error; 200 IEEE80211_LOCK(ic); 201 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 202 IEEE80211_UNLOCK(ic); 203 return 0; 204} 205 206void 207ieee80211_sysctl_attach(struct ieee80211com ic) 208{ 209} 210* 211void 212ieee80211_sysctl_detach(struct ieee80211com ic) 213{ 214} 215* 216void 217ieee80211_sysctl_vattach(struct ieee80211vap vap) 218{ 219* struct ifnet ifp = vap->iv_ifp; 220* struct sysctl_ctx_list ctx; 221* struct sysctl_oid oid; 222* char num[14]; /* sufficient for 32 bits / 223* 224 ctx = (struct sysctl_ctx_list ) malloc(sizeof(struct sysctl_ctx_list), 225* M_DEVBUF, M_NOWAIT \| M_ZERO); 226 if (ctx == NULL) { 227 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 228 __func__); 229 return; 230 } 231 sysctl_ctx_init(ctx); 232 snprintf(num, sizeof(num), "%u", ifp->if_dunit); 233 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 234 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 235 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 236 "%parent", CTLTYPE_STRING \| CTLFLAG_RD, vap->iv_ic, 0, 237 ieee80211_sysctl_parent, "A", "parent device"); 238 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 239 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 240 "driver capabilities"); 241#ifdef IEEE80211_DEBUG 242 vap->iv_debug = ieee80211_debug; 243 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 244 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 245 "control debugging printfs"); 246#endif 247 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 248 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 249 "consecutive beacon misses before scanning"); 250 /* XXX inherit from tunables / 251* SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 252 "inact_run", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_run, 0, 253 ieee80211_sysctl_inact, "I", 254 "station inactivity timeout (sec)"); 255 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 256 "inact_probe", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_probe, 0, 257 ieee80211_sysctl_inact, "I", 258 "station inactivity probe timeout (sec)"); 259 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 260 "inact_auth", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_auth, 0, 261 ieee80211_sysctl_inact, "I", 262 "station authentication timeout (sec)"); 263 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 264 "inact_init", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_init, 0, 265 ieee80211_sysctl_inact, "I", 266 "station initial state timeout (sec)"); 267 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 268 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 269 "ampdu_mintraffic_bk", CTLFLAG_RW, 270 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 271 "BK traffic tx aggr threshold (pps)"); 272 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 273 "ampdu_mintraffic_be", CTLFLAG_RW, 274 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 275 "BE traffic tx aggr threshold (pps)"); 276 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 277 "ampdu_mintraffic_vo", CTLFLAG_RW, 278 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 279 "VO traffic tx aggr threshold (pps)"); 280 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 281 "ampdu_mintraffic_vi", CTLFLAG_RW, 282 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 283 "VI traffic tx aggr threshold (pps)"); 284 } 285 if (vap->iv_caps & IEEE80211_C_DFS) { 286 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 287 "radar", CTLTYPE_INT \| CTLFLAG_RW, vap->iv_ic, 0, 288 ieee80211_sysctl_radar, "I", "simulate radar event"); 289 } 290 vap->iv_sysctl = ctx; 291 vap->iv_oid = oid; 292} 293 294void 295ieee80211_sysctl_vdetach(struct ieee80211vap vap) 296{ 297* 298 if (vap->iv_sysctl != NULL) { 299 sysctl_ctx_free(vap->iv_sysctl); 300 free(vap->iv_sysctl, M_DEVBUF); 301 vap->iv_sysctl = NULL; 302 } 303} 304 305int 306ieee80211_node_dectestref(struct ieee80211_node ni) 307{ 308* /* XXX need equivalent of atomic_dec_and_test / 309* atomic_subtract_int(&ni->ni_refcnt, 1); 310 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 311} 312 313void 314ieee80211_drain_ifq(struct ifqueue ifq) 315{ 316* struct ieee80211_node ni; 317* struct mbuf m; 318* 319 for (;;) { 320 IF_DEQUEUE(ifq, m); 321 if (m == NULL) 322 break; 323 324 ni = (struct ieee80211_node )m->m_pkthdr.rcvif; 325* KASSERT(ni != NULL, ("frame w/o node")); 326 ieee80211_free_node(ni); 327 m->m_pkthdr.rcvif = NULL; 328 329 m_freem(m); 330 } 331} 332 333void 334ieee80211_flush_ifq(struct ifqueue ifq, struct ieee80211vap vap) 335{ 336 struct ieee80211_node ni; 337* struct mbuf m, mprev; 338* 339 IF_LOCK(ifq); 340 mprev = &ifq->ifq_head; 341 while ((m = mprev) != NULL) { 342* ni = (struct ieee80211_node )m->m_pkthdr.rcvif; 343* if (ni != NULL && ni->ni_vap == vap) { 344 mprev = m->m_nextpkt; / remove from list / 345* ifq->ifq_len--; 346 347 m_freem(m); 348 ieee80211_free_node(ni); /* reclaim ref / 349* } else 350 mprev = &m->m_nextpkt; 351 } 352 /* recalculate tail ptr / 353* m = ifq->ifq_head; 354 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 355 ; 356 ifq->ifq_tail = m; 357 IF_UNLOCK(ifq); 358} 359 360/* 361 * As above, for mbufs allocated with m_gethdr/MGETHDR 362 * or initialized by M_COPY_PKTHDR. 363 / 364#define MC_ALIGN(m, len) \ 365do { \ 366* (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 367} while (/* CONSTCOND / 0) 368* 369/* 370 * Allocate and setup a management frame of the specified 371 * size. We return the mbuf and a pointer to the start 372 * of the contiguous data area that's been reserved based 373 * on the packet length. The data area is forced to 32-bit 374 * alignment and the buffer length to a multiple of 4 bytes. 375 * This is done mainly so beacon frames (that require this) 376 * can use this interface too. 377 / 378struct mbuf 379ieee80211_getmgtframe(uint8_t *frm, int headroom, int pktlen) 380{ 381* struct mbuf m; 382* u_int len; 383 384 /* 385 * NB: we know the mbuf routines will align the data area 386 * so we don't need to do anything special. 387 / 388* len = roundup2(headroom + pktlen, 4); 389 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 390 if (len < MINCLSIZE) { 391 m = m_gethdr(M_NOWAIT, MT_DATA); 392 /* 393 * Align the data in case additional headers are added. 394 * This should only happen when a WEP header is added 395 * which only happens for shared key authentication mgt 396 * frames which all fit in MHLEN. 397 / 398* if (m != NULL) 399 MH_ALIGN(m, len); 400 } else { 401 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 402 if (m != NULL) 403 MC_ALIGN(m, len); 404 } 405 if (m != NULL) { 406 m->m_data += headroom; 407 frm = m->m_data; 408* } 409 return m; 410} 411 412/* 413 * Re-align the payload in the mbuf. This is mainly used (right now) 414 * to handle IP header alignment requirements on certain architectures. 415 / 416struct mbuf 417ieee80211_realign(struct ieee80211vap vap, struct mbuf m, size_t align) 418{ 419 int pktlen, space; 420 struct mbuf n; 421* 422 pktlen = m->m_pkthdr.len; 423 space = pktlen + align; 424 if (space < MINCLSIZE) 425 n = m_gethdr(M_DONTWAIT, MT_DATA); 426 else { 427 n = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, 428 space <= MCLBYTES ? MCLBYTES : 429#if MJUMPAGESIZE != MCLBYTES 430 space <= MJUMPAGESIZE ? MJUMPAGESIZE : 431#endif 432 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 433 } 434 if (__predict_true(n != NULL)) { 435 m_move_pkthdr(n, m); 436 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 437 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 438 n->m_len = pktlen; 439 } else { 440 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 441 mtod(m, const struct ieee80211_frame ), NULL, 442* "%s", "no mbuf to realign"); 443 vap->iv_stats.is_rx_badalign++; 444 } 445 m_freem(m); 446 return n; 447} 448 449int 450ieee80211_add_callback(struct mbuf m, 451* void (func)(struct ieee80211_node , void , int), void arg) 452{ 453 struct m_tag mtag; 454* struct ieee80211_cb cb; 455* 456 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 457 sizeof(struct ieee80211_cb), M_NOWAIT); 458 if (mtag == NULL) 459 return 0; 460 461 cb = (struct ieee80211_cb )(mtag+1); 462* cb->func = func; 463 cb->arg = arg; 464 m_tag_prepend(m, mtag); 465 m->m_flags \|= M_TXCB; 466 return 1; 467} 468 469void 470ieee80211_process_callback(struct ieee80211_node ni, 471* struct mbuf m, int status) 472{ 473* struct m_tag mtag; 474* 475 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 476 if (mtag != NULL) { 477 struct ieee80211_cb cb = (struct ieee80211_cb )(mtag+1); 478 cb->func(ni, cb->arg, status); 479 } 480} 481 482#include <sys/libkern.h> 483 484void 485get_random_bytes(void p, size_t n) 486{ 487* uint8_t dp = p; 488* 489 while (n > 0) { 490 uint32_t v = arc4random(); 491 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 492 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 493 dp += sizeof(uint32_t), n -= nb; 494 } 495} 496 497/* 498 * Helper function for events that pass just a single mac address. 499 / 500static void 501notify_macaddr(struct ifnet ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 502{ 503 struct ieee80211_join_event iev; 504 505 CURVNET_SET(ifp->if_vnet); 506 memset(&iev, 0, sizeof(iev)); 507 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 508 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 509 CURVNET_RESTORE(); 510} 511 512void 513ieee80211_notify_node_join(struct ieee80211_node ni, int newassoc) 514{ 515* struct ieee80211vap vap = ni->ni_vap; 516* struct ifnet ifp = vap->iv_ifp; 517* 518 CURVNET_SET_QUIET(ifp->if_vnet); 519 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 520 (ni == vap->iv_bss) ? "bss " : ""); 521 522 if (ni == vap->iv_bss) { 523 notify_macaddr(ifp, newassoc ? 524 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 525 if_link_state_change(ifp, LINK_STATE_UP); 526 } else { 527 notify_macaddr(ifp, newassoc ? 528 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 529 } 530 CURVNET_RESTORE(); 531} 532 533void 534ieee80211_notify_node_leave(struct ieee80211_node ni) 535{ 536* struct ieee80211vap vap = ni->ni_vap; 537* struct ifnet ifp = vap->iv_ifp; 538* 539 CURVNET_SET_QUIET(ifp->if_vnet); 540 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 541 (ni == vap->iv_bss) ? "bss " : ""); 542 543 if (ni == vap->iv_bss) { 544 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 545 if_link_state_change(ifp, LINK_STATE_DOWN); 546 } else { 547 /* fire off wireless event station leaving / 548* notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 549 } 550 CURVNET_RESTORE(); 551} 552 553void 554ieee80211_notify_scan_done(struct ieee80211vap vap) 555{ 556* struct ifnet ifp = vap->iv_ifp; 557* 558 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 559 560 /* dispatch wireless event indicating scan completed / 561* CURVNET_SET(ifp->if_vnet); 562 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 563 CURVNET_RESTORE(); 564} 565 566void 567ieee80211_notify_replay_failure(struct ieee80211vap vap, 568* const struct ieee80211_frame wh, const struct ieee80211_key k, 569 u_int64_t rsc, int tid) 570{ 571 struct ifnet ifp = vap->iv_ifp; 572* 573 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 574 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 575 k->wk_cipher->ic_name, tid, (intmax_t) rsc, 576 (intmax_t) k->wk_keyrsc[tid], 577 k->wk_keyix, k->wk_rxkeyix); 578 579 if (ifp != NULL) { /* NB: for cipher test modules / 580* struct ieee80211_replay_event iev; 581 582 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 583 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 584 iev.iev_cipher = k->wk_cipher->ic_cipher; 585 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 586 iev.iev_keyix = k->wk_rxkeyix; 587 else 588 iev.iev_keyix = k->wk_keyix; 589 iev.iev_keyrsc = k->wk_keyrsc[tid]; 590 iev.iev_rsc = rsc; 591 CURVNET_SET(ifp->if_vnet); 592 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 593 CURVNET_RESTORE(); 594 } 595} 596 597void 598ieee80211_notify_michael_failure(struct ieee80211vap vap, 599* const struct ieee80211_frame wh, u_int keyix) 600{ 601* struct ifnet ifp = vap->iv_ifp; 602* 603 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 604 "michael MIC verification failed <keyix %u>", keyix); 605 vap->iv_stats.is_rx_tkipmic++; 606 607 if (ifp != NULL) { /* NB: for cipher test modules / 608* struct ieee80211_michael_event iev; 609 610 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 611 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 612 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 613 iev.iev_keyix = keyix; 614 CURVNET_SET(ifp->if_vnet); 615 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 616 CURVNET_RESTORE(); 617 } 618} 619 620void 621ieee80211_notify_wds_discover(struct ieee80211_node ni) 622{ 623* struct ieee80211vap vap = ni->ni_vap; 624* struct ifnet ifp = vap->iv_ifp; 625* 626 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 627} 628 629void 630ieee80211_notify_csa(struct ieee80211com ic, 631* const struct ieee80211_channel c, int mode, int count) 632{ 633* struct ifnet ifp = ic->ic_ifp; 634* struct ieee80211_csa_event iev; 635 636 memset(&iev, 0, sizeof(iev)); 637 iev.iev_flags = c->ic_flags; 638 iev.iev_freq = c->ic_freq; 639 iev.iev_ieee = c->ic_ieee; 640 iev.iev_mode = mode; 641 iev.iev_count = count; 642 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 643} 644 645void 646ieee80211_notify_radar(struct ieee80211com ic, 647* const struct ieee80211_channel c) 648{ 649* struct ifnet ifp = ic->ic_ifp; 650* struct ieee80211_radar_event iev; 651 652 memset(&iev, 0, sizeof(iev)); 653 iev.iev_flags = c->ic_flags; 654 iev.iev_freq = c->ic_freq; 655 iev.iev_ieee = c->ic_ieee; 656 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 657} 658 659void 660ieee80211_notify_cac(struct ieee80211com ic, 661* const struct ieee80211_channel c, enum ieee80211_notify_cac_event type) 662{ 663* struct ifnet ifp = ic->ic_ifp; 664* struct ieee80211_cac_event iev; 665 666 memset(&iev, 0, sizeof(iev)); 667 iev.iev_flags = c->ic_flags; 668 iev.iev_freq = c->ic_freq; 669 iev.iev_ieee = c->ic_ieee; 670 iev.iev_type = type; 671 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 672} 673 674void 675ieee80211_notify_node_deauth(struct ieee80211_node ni) 676{ 677* struct ieee80211vap vap = ni->ni_vap; 678* struct ifnet ifp = vap->iv_ifp; 679* 680 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 681 682 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 683} 684 685void 686ieee80211_notify_node_auth(struct ieee80211_node ni) 687{ 688* struct ieee80211vap vap = ni->ni_vap; 689* struct ifnet ifp = vap->iv_ifp; 690* 691 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 692 693 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 694} 695 696void 697ieee80211_notify_country(struct ieee80211vap vap, 698* const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 699{ 700 struct ifnet ifp = vap->iv_ifp; 701* struct ieee80211_country_event iev; 702 703 memset(&iev, 0, sizeof(iev)); 704 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 705 iev.iev_cc[0] = cc[0]; 706 iev.iev_cc[1] = cc[1]; 707 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 708} 709 710void 711ieee80211_notify_radio(struct ieee80211com ic, int state) 712{ 713* struct ifnet ifp = ic->ic_ifp; 714* struct ieee80211_radio_event iev; 715 716 memset(&iev, 0, sizeof(iev)); 717 iev.iev_state = state; 718 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 719} 720 721void 722ieee80211_load_module(const char modname) 723{ 724* 725#ifdef notyet 726 (void)kern_kldload(curthread, modname, NULL); 727#else 728 printf("%s: load the %s module by hand for now.\n", __func__, modname); 729#endif 730} 731 732static eventhandler_tag wlan_bpfevent; 733static eventhandler_tag wlan_ifllevent; 734 735static void 736bpf_track(void arg, struct ifnet ifp, int dlt, int attach) 737{ 738 /* NB: identify vap's by if_start / 739* if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) { 740 struct ieee80211vap vap = ifp->if_softc; 741* /* 742 * Track bpf radiotap listener state. We mark the vap 743 * to indicate if any listener is present and the com 744 * to indicate if any listener exists on any associated 745 * vap. This flag is used by drivers to prepare radiotap 746 * state only when needed. 747 / 748* if (attach) { 749 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 750 if (vap->iv_opmode == IEEE80211_M_MONITOR) 751 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 752 } else if (!bpf_peers_present(vap->iv_rawbpf)) { 753 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 754 if (vap->iv_opmode == IEEE80211_M_MONITOR) 755 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 756 } 757 } 758} 759 760static void 761wlan_iflladdr(void arg __unused, struct ifnet ifp) 762{ 763 struct ieee80211com ic = ifp->if_l2com; 764* struct ieee80211vap vap, next; 765 766 if (ifp->if_type != IFT_IEEE80211 \|\| ic == NULL) 767 return; 768 769 IEEE80211_LOCK(ic); 770 TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) { 771 /* 772 * If the MAC address has changed on the parent and it was 773 * copied to the vap on creation then re-sync. 774 / 775* if (vap->iv_ic == ic && 776 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 777 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 778 IEEE80211_UNLOCK(ic); 779 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 780 IEEE80211_ADDR_LEN); 781 IEEE80211_LOCK(ic); 782 } 783 } 784 IEEE80211_UNLOCK(ic); 785} 786 787/* 788 * Module glue. 789 * 790 * NB: the module name is "wlan" for compatibility with NetBSD. 791 / 792static int 793wlan_modevent(module_t mod, int type, void unused) 794{ 795 switch (type) { 796 case MOD_LOAD: 797 if (bootverbose) 798 printf("wlan: <802.11 Link Layer>\n"); 799 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 800 bpf_track, 0, EVENTHANDLER_PRI_ANY); 801 if (wlan_bpfevent == NULL) 802 return ENOMEM; 803 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 804 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 805 if (wlan_ifllevent == NULL) { 806 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 807 return ENOMEM; 808 }	156} 157 158int 159ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) 160{ 161 int msecs = ticks_to_msecs((int )arg1); 162 int error, t; 163 164 error = sysctl_handle_int(oidp, &msecs, 0, req); 165 if (error \|\| !req->newptr) 166 return error; 167 t = msecs_to_ticks(msecs); 168 (int )arg1 = (t < 1) ? 1 : t; 169 return 0; 170} 171 172static int 173ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) 174{ 175 int inact = ((int )arg1) * IEEE80211_INACT_WAIT; 176 int error; 177 178 error = sysctl_handle_int(oidp, &inact, 0, req); 179 if (error \|\| !req->newptr) 180 return error; 181 (int )arg1 = inact / IEEE80211_INACT_WAIT; 182 return 0; 183} 184 185static int 186ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) 187{ 188 struct ieee80211com ic = arg1; 189* const char name = ic->ic_ifp->if_xname; 190* 191 return SYSCTL_OUT(req, name, strlen(name)); 192} 193 194static int 195ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) 196{ 197 struct ieee80211com ic = arg1; 198* int t = 0, error; 199 200 error = sysctl_handle_int(oidp, &t, 0, req); 201 if (error \|\| !req->newptr) 202 return error; 203 IEEE80211_LOCK(ic); 204 ieee80211_dfs_notify_radar(ic, ic->ic_curchan); 205 IEEE80211_UNLOCK(ic); 206 return 0; 207} 208 209void 210ieee80211_sysctl_attach(struct ieee80211com ic) 211{ 212} 213* 214void 215ieee80211_sysctl_detach(struct ieee80211com ic) 216{ 217} 218* 219void 220ieee80211_sysctl_vattach(struct ieee80211vap vap) 221{ 222* struct ifnet ifp = vap->iv_ifp; 223* struct sysctl_ctx_list ctx; 224* struct sysctl_oid oid; 225* char num[14]; /* sufficient for 32 bits / 226* 227 ctx = (struct sysctl_ctx_list ) malloc(sizeof(struct sysctl_ctx_list), 228* M_DEVBUF, M_NOWAIT \| M_ZERO); 229 if (ctx == NULL) { 230 if_printf(ifp, "%s: cannot allocate sysctl context!\n", 231 __func__); 232 return; 233 } 234 sysctl_ctx_init(ctx); 235 snprintf(num, sizeof(num), "%u", ifp->if_dunit); 236 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), 237 OID_AUTO, num, CTLFLAG_RD, NULL, ""); 238 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 239 "%parent", CTLTYPE_STRING \| CTLFLAG_RD, vap->iv_ic, 0, 240 ieee80211_sysctl_parent, "A", "parent device"); 241 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 242 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, 243 "driver capabilities"); 244#ifdef IEEE80211_DEBUG 245 vap->iv_debug = ieee80211_debug; 246 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 247 "debug", CTLFLAG_RW, &vap->iv_debug, 0, 248 "control debugging printfs"); 249#endif 250 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 251 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, 252 "consecutive beacon misses before scanning"); 253 /* XXX inherit from tunables / 254* SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 255 "inact_run", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_run, 0, 256 ieee80211_sysctl_inact, "I", 257 "station inactivity timeout (sec)"); 258 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 259 "inact_probe", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_probe, 0, 260 ieee80211_sysctl_inact, "I", 261 "station inactivity probe timeout (sec)"); 262 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 263 "inact_auth", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_auth, 0, 264 ieee80211_sysctl_inact, "I", 265 "station authentication timeout (sec)"); 266 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 267 "inact_init", CTLTYPE_INT \| CTLFLAG_RW, &vap->iv_inact_init, 0, 268 ieee80211_sysctl_inact, "I", 269 "station initial state timeout (sec)"); 270 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 271 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 272 "ampdu_mintraffic_bk", CTLFLAG_RW, 273 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, 274 "BK traffic tx aggr threshold (pps)"); 275 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 276 "ampdu_mintraffic_be", CTLFLAG_RW, 277 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, 278 "BE traffic tx aggr threshold (pps)"); 279 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 280 "ampdu_mintraffic_vo", CTLFLAG_RW, 281 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, 282 "VO traffic tx aggr threshold (pps)"); 283 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 284 "ampdu_mintraffic_vi", CTLFLAG_RW, 285 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, 286 "VI traffic tx aggr threshold (pps)"); 287 } 288 if (vap->iv_caps & IEEE80211_C_DFS) { 289 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 290 "radar", CTLTYPE_INT \| CTLFLAG_RW, vap->iv_ic, 0, 291 ieee80211_sysctl_radar, "I", "simulate radar event"); 292 } 293 vap->iv_sysctl = ctx; 294 vap->iv_oid = oid; 295} 296 297void 298ieee80211_sysctl_vdetach(struct ieee80211vap vap) 299{ 300* 301 if (vap->iv_sysctl != NULL) { 302 sysctl_ctx_free(vap->iv_sysctl); 303 free(vap->iv_sysctl, M_DEVBUF); 304 vap->iv_sysctl = NULL; 305 } 306} 307 308int 309ieee80211_node_dectestref(struct ieee80211_node ni) 310{ 311* /* XXX need equivalent of atomic_dec_and_test / 312* atomic_subtract_int(&ni->ni_refcnt, 1); 313 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); 314} 315 316void 317ieee80211_drain_ifq(struct ifqueue ifq) 318{ 319* struct ieee80211_node ni; 320* struct mbuf m; 321* 322 for (;;) { 323 IF_DEQUEUE(ifq, m); 324 if (m == NULL) 325 break; 326 327 ni = (struct ieee80211_node )m->m_pkthdr.rcvif; 328* KASSERT(ni != NULL, ("frame w/o node")); 329 ieee80211_free_node(ni); 330 m->m_pkthdr.rcvif = NULL; 331 332 m_freem(m); 333 } 334} 335 336void 337ieee80211_flush_ifq(struct ifqueue ifq, struct ieee80211vap vap) 338{ 339 struct ieee80211_node ni; 340* struct mbuf m, mprev; 341* 342 IF_LOCK(ifq); 343 mprev = &ifq->ifq_head; 344 while ((m = mprev) != NULL) { 345* ni = (struct ieee80211_node )m->m_pkthdr.rcvif; 346* if (ni != NULL && ni->ni_vap == vap) { 347 mprev = m->m_nextpkt; / remove from list / 348* ifq->ifq_len--; 349 350 m_freem(m); 351 ieee80211_free_node(ni); /* reclaim ref / 352* } else 353 mprev = &m->m_nextpkt; 354 } 355 /* recalculate tail ptr / 356* m = ifq->ifq_head; 357 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) 358 ; 359 ifq->ifq_tail = m; 360 IF_UNLOCK(ifq); 361} 362 363/* 364 * As above, for mbufs allocated with m_gethdr/MGETHDR 365 * or initialized by M_COPY_PKTHDR. 366 / 367#define MC_ALIGN(m, len) \ 368do { \ 369* (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \ 370} while (/* CONSTCOND / 0) 371* 372/* 373 * Allocate and setup a management frame of the specified 374 * size. We return the mbuf and a pointer to the start 375 * of the contiguous data area that's been reserved based 376 * on the packet length. The data area is forced to 32-bit 377 * alignment and the buffer length to a multiple of 4 bytes. 378 * This is done mainly so beacon frames (that require this) 379 * can use this interface too. 380 / 381struct mbuf 382ieee80211_getmgtframe(uint8_t *frm, int headroom, int pktlen) 383{ 384* struct mbuf m; 385* u_int len; 386 387 /* 388 * NB: we know the mbuf routines will align the data area 389 * so we don't need to do anything special. 390 / 391* len = roundup2(headroom + pktlen, 4); 392 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 393 if (len < MINCLSIZE) { 394 m = m_gethdr(M_NOWAIT, MT_DATA); 395 /* 396 * Align the data in case additional headers are added. 397 * This should only happen when a WEP header is added 398 * which only happens for shared key authentication mgt 399 * frames which all fit in MHLEN. 400 / 401* if (m != NULL) 402 MH_ALIGN(m, len); 403 } else { 404 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 405 if (m != NULL) 406 MC_ALIGN(m, len); 407 } 408 if (m != NULL) { 409 m->m_data += headroom; 410 frm = m->m_data; 411* } 412 return m; 413} 414 415/* 416 * Re-align the payload in the mbuf. This is mainly used (right now) 417 * to handle IP header alignment requirements on certain architectures. 418 / 419struct mbuf 420ieee80211_realign(struct ieee80211vap vap, struct mbuf m, size_t align) 421{ 422 int pktlen, space; 423 struct mbuf n; 424* 425 pktlen = m->m_pkthdr.len; 426 space = pktlen + align; 427 if (space < MINCLSIZE) 428 n = m_gethdr(M_DONTWAIT, MT_DATA); 429 else { 430 n = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, 431 space <= MCLBYTES ? MCLBYTES : 432#if MJUMPAGESIZE != MCLBYTES 433 space <= MJUMPAGESIZE ? MJUMPAGESIZE : 434#endif 435 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); 436 } 437 if (__predict_true(n != NULL)) { 438 m_move_pkthdr(n, m); 439 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); 440 m_copydata(m, 0, pktlen, mtod(n, caddr_t)); 441 n->m_len = pktlen; 442 } else { 443 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 444 mtod(m, const struct ieee80211_frame ), NULL, 445* "%s", "no mbuf to realign"); 446 vap->iv_stats.is_rx_badalign++; 447 } 448 m_freem(m); 449 return n; 450} 451 452int 453ieee80211_add_callback(struct mbuf m, 454* void (func)(struct ieee80211_node , void , int), void arg) 455{ 456 struct m_tag mtag; 457* struct ieee80211_cb cb; 458* 459 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, 460 sizeof(struct ieee80211_cb), M_NOWAIT); 461 if (mtag == NULL) 462 return 0; 463 464 cb = (struct ieee80211_cb )(mtag+1); 465* cb->func = func; 466 cb->arg = arg; 467 m_tag_prepend(m, mtag); 468 m->m_flags \|= M_TXCB; 469 return 1; 470} 471 472void 473ieee80211_process_callback(struct ieee80211_node ni, 474* struct mbuf m, int status) 475{ 476* struct m_tag mtag; 477* 478 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); 479 if (mtag != NULL) { 480 struct ieee80211_cb cb = (struct ieee80211_cb )(mtag+1); 481 cb->func(ni, cb->arg, status); 482 } 483} 484 485#include <sys/libkern.h> 486 487void 488get_random_bytes(void p, size_t n) 489{ 490* uint8_t dp = p; 491* 492 while (n > 0) { 493 uint32_t v = arc4random(); 494 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; 495 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); 496 dp += sizeof(uint32_t), n -= nb; 497 } 498} 499 500/* 501 * Helper function for events that pass just a single mac address. 502 / 503static void 504notify_macaddr(struct ifnet ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) 505{ 506 struct ieee80211_join_event iev; 507 508 CURVNET_SET(ifp->if_vnet); 509 memset(&iev, 0, sizeof(iev)); 510 IEEE80211_ADDR_COPY(iev.iev_addr, mac); 511 rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); 512 CURVNET_RESTORE(); 513} 514 515void 516ieee80211_notify_node_join(struct ieee80211_node ni, int newassoc) 517{ 518* struct ieee80211vap vap = ni->ni_vap; 519* struct ifnet ifp = vap->iv_ifp; 520* 521 CURVNET_SET_QUIET(ifp->if_vnet); 522 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", 523 (ni == vap->iv_bss) ? "bss " : ""); 524 525 if (ni == vap->iv_bss) { 526 notify_macaddr(ifp, newassoc ? 527 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); 528 if_link_state_change(ifp, LINK_STATE_UP); 529 } else { 530 notify_macaddr(ifp, newassoc ? 531 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); 532 } 533 CURVNET_RESTORE(); 534} 535 536void 537ieee80211_notify_node_leave(struct ieee80211_node ni) 538{ 539* struct ieee80211vap vap = ni->ni_vap; 540* struct ifnet ifp = vap->iv_ifp; 541* 542 CURVNET_SET_QUIET(ifp->if_vnet); 543 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", 544 (ni == vap->iv_bss) ? "bss " : ""); 545 546 if (ni == vap->iv_bss) { 547 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 548 if_link_state_change(ifp, LINK_STATE_DOWN); 549 } else { 550 /* fire off wireless event station leaving / 551* notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); 552 } 553 CURVNET_RESTORE(); 554} 555 556void 557ieee80211_notify_scan_done(struct ieee80211vap vap) 558{ 559* struct ifnet ifp = vap->iv_ifp; 560* 561 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); 562 563 /* dispatch wireless event indicating scan completed / 564* CURVNET_SET(ifp->if_vnet); 565 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 566 CURVNET_RESTORE(); 567} 568 569void 570ieee80211_notify_replay_failure(struct ieee80211vap vap, 571* const struct ieee80211_frame wh, const struct ieee80211_key k, 572 u_int64_t rsc, int tid) 573{ 574 struct ifnet ifp = vap->iv_ifp; 575* 576 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 577 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>", 578 k->wk_cipher->ic_name, tid, (intmax_t) rsc, 579 (intmax_t) k->wk_keyrsc[tid], 580 k->wk_keyix, k->wk_rxkeyix); 581 582 if (ifp != NULL) { /* NB: for cipher test modules / 583* struct ieee80211_replay_event iev; 584 585 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 586 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 587 iev.iev_cipher = k->wk_cipher->ic_cipher; 588 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 589 iev.iev_keyix = k->wk_rxkeyix; 590 else 591 iev.iev_keyix = k->wk_keyix; 592 iev.iev_keyrsc = k->wk_keyrsc[tid]; 593 iev.iev_rsc = rsc; 594 CURVNET_SET(ifp->if_vnet); 595 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 596 CURVNET_RESTORE(); 597 } 598} 599 600void 601ieee80211_notify_michael_failure(struct ieee80211vap vap, 602* const struct ieee80211_frame wh, u_int keyix) 603{ 604* struct ifnet ifp = vap->iv_ifp; 605* 606 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, 607 "michael MIC verification failed <keyix %u>", keyix); 608 vap->iv_stats.is_rx_tkipmic++; 609 610 if (ifp != NULL) { /* NB: for cipher test modules / 611* struct ieee80211_michael_event iev; 612 613 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 614 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 615 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 616 iev.iev_keyix = keyix; 617 CURVNET_SET(ifp->if_vnet); 618 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 619 CURVNET_RESTORE(); 620 } 621} 622 623void 624ieee80211_notify_wds_discover(struct ieee80211_node ni) 625{ 626* struct ieee80211vap vap = ni->ni_vap; 627* struct ifnet ifp = vap->iv_ifp; 628* 629 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); 630} 631 632void 633ieee80211_notify_csa(struct ieee80211com ic, 634* const struct ieee80211_channel c, int mode, int count) 635{ 636* struct ifnet ifp = ic->ic_ifp; 637* struct ieee80211_csa_event iev; 638 639 memset(&iev, 0, sizeof(iev)); 640 iev.iev_flags = c->ic_flags; 641 iev.iev_freq = c->ic_freq; 642 iev.iev_ieee = c->ic_ieee; 643 iev.iev_mode = mode; 644 iev.iev_count = count; 645 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); 646} 647 648void 649ieee80211_notify_radar(struct ieee80211com ic, 650* const struct ieee80211_channel c) 651{ 652* struct ifnet ifp = ic->ic_ifp; 653* struct ieee80211_radar_event iev; 654 655 memset(&iev, 0, sizeof(iev)); 656 iev.iev_flags = c->ic_flags; 657 iev.iev_freq = c->ic_freq; 658 iev.iev_ieee = c->ic_ieee; 659 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); 660} 661 662void 663ieee80211_notify_cac(struct ieee80211com ic, 664* const struct ieee80211_channel c, enum ieee80211_notify_cac_event type) 665{ 666* struct ifnet ifp = ic->ic_ifp; 667* struct ieee80211_cac_event iev; 668 669 memset(&iev, 0, sizeof(iev)); 670 iev.iev_flags = c->ic_flags; 671 iev.iev_freq = c->ic_freq; 672 iev.iev_ieee = c->ic_ieee; 673 iev.iev_type = type; 674 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); 675} 676 677void 678ieee80211_notify_node_deauth(struct ieee80211_node ni) 679{ 680* struct ieee80211vap vap = ni->ni_vap; 681* struct ifnet ifp = vap->iv_ifp; 682* 683 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); 684 685 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); 686} 687 688void 689ieee80211_notify_node_auth(struct ieee80211_node ni) 690{ 691* struct ieee80211vap vap = ni->ni_vap; 692* struct ifnet ifp = vap->iv_ifp; 693* 694 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); 695 696 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); 697} 698 699void 700ieee80211_notify_country(struct ieee80211vap vap, 701* const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) 702{ 703 struct ifnet ifp = vap->iv_ifp; 704* struct ieee80211_country_event iev; 705 706 memset(&iev, 0, sizeof(iev)); 707 IEEE80211_ADDR_COPY(iev.iev_addr, bssid); 708 iev.iev_cc[0] = cc[0]; 709 iev.iev_cc[1] = cc[1]; 710 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); 711} 712 713void 714ieee80211_notify_radio(struct ieee80211com ic, int state) 715{ 716* struct ifnet ifp = ic->ic_ifp; 717* struct ieee80211_radio_event iev; 718 719 memset(&iev, 0, sizeof(iev)); 720 iev.iev_state = state; 721 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); 722} 723 724void 725ieee80211_load_module(const char modname) 726{ 727* 728#ifdef notyet 729 (void)kern_kldload(curthread, modname, NULL); 730#else 731 printf("%s: load the %s module by hand for now.\n", __func__, modname); 732#endif 733} 734 735static eventhandler_tag wlan_bpfevent; 736static eventhandler_tag wlan_ifllevent; 737 738static void 739bpf_track(void arg, struct ifnet ifp, int dlt, int attach) 740{ 741 /* NB: identify vap's by if_start / 742* if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) { 743 struct ieee80211vap vap = ifp->if_softc; 744* /* 745 * Track bpf radiotap listener state. We mark the vap 746 * to indicate if any listener is present and the com 747 * to indicate if any listener exists on any associated 748 * vap. This flag is used by drivers to prepare radiotap 749 * state only when needed. 750 / 751* if (attach) { 752 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); 753 if (vap->iv_opmode == IEEE80211_M_MONITOR) 754 atomic_add_int(&vap->iv_ic->ic_montaps, 1); 755 } else if (!bpf_peers_present(vap->iv_rawbpf)) { 756 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); 757 if (vap->iv_opmode == IEEE80211_M_MONITOR) 758 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); 759 } 760 } 761} 762 763static void 764wlan_iflladdr(void arg __unused, struct ifnet ifp) 765{ 766 struct ieee80211com ic = ifp->if_l2com; 767* struct ieee80211vap vap, next; 768 769 if (ifp->if_type != IFT_IEEE80211 \|\| ic == NULL) 770 return; 771 772 IEEE80211_LOCK(ic); 773 TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) { 774 /* 775 * If the MAC address has changed on the parent and it was 776 * copied to the vap on creation then re-sync. 777 / 778* if (vap->iv_ic == ic && 779 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) { 780 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); 781 IEEE80211_UNLOCK(ic); 782 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp), 783 IEEE80211_ADDR_LEN); 784 IEEE80211_LOCK(ic); 785 } 786 } 787 IEEE80211_UNLOCK(ic); 788} 789 790/* 791 * Module glue. 792 * 793 * NB: the module name is "wlan" for compatibility with NetBSD. 794 / 795static int 796wlan_modevent(module_t mod, int type, void unused) 797{ 798 switch (type) { 799 case MOD_LOAD: 800 if (bootverbose) 801 printf("wlan: <802.11 Link Layer>\n"); 802 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, 803 bpf_track, 0, EVENTHANDLER_PRI_ANY); 804 if (wlan_bpfevent == NULL) 805 return ENOMEM; 806 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, 807 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); 808 if (wlan_ifllevent == NULL) { 809 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 810 return ENOMEM; 811 }
809 if_clone_attach(&wlan_cloner);	812 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, 813 wlan_clone_destroy, 0);
810 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 811 return 0; 812 case MOD_UNLOAD: 813 if_deregister_com_alloc(IFT_IEEE80211);	814 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free); 815 return 0; 816 case MOD_UNLOAD: 817 if_deregister_com_alloc(IFT_IEEE80211);
814 if_clone_detach(&wlan_cloner);	818 if_clone_detach(wlan_cloner);
815 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 816 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 817 return 0; 818 } 819 return EINVAL; 820} 821 822static moduledata_t wlan_mod = {	819 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); 820 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); 821 return 0; 822 } 823 return EINVAL; 824} 825 826static moduledata_t wlan_mod = {
823 "wlan",	827 wlanname,
824 wlan_modevent, 825 0 826}; 827DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 828MODULE_VERSION(wlan, 1); 829MODULE_DEPEND(wlan, ether, 1, 1, 1); 830#ifdef IEEE80211_ALQ 831MODULE_DEPEND(wlan, alq, 1, 1, 1); 832#endif /* IEEE80211_ALQ / 833*	828 wlan_modevent, 829 0 830}; 831DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 832MODULE_VERSION(wlan, 1); 833MODULE_DEPEND(wlan, ether, 1, 1, 1); 834#ifdef IEEE80211_ALQ 835MODULE_DEPEND(wlan, alq, 1, 1, 1); 836#endif /* IEEE80211_ALQ / 837*