ieee80211_netbsd.c revision 1.12
1 /* $NetBSD: ieee80211_netbsd.c,v 1.12 2006/01/16 21:45:38 yamt Exp $ */ 2 /*- 3 * Copyright (c) 2003-2005 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #ifdef __FreeBSD__ 31 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_freebsd.c,v 1.8 2005/08/08 18:46:35 sam Exp $"); 32 #else 33 __KERNEL_RCSID(0, "$NetBSD: ieee80211_netbsd.c,v 1.12 2006/01/16 21:45:38 yamt Exp $"); 34 #endif 35 36 /* 37 * IEEE 802.11 support (NetBSD-specific code) 38 */ 39 #include <sys/param.h> 40 #include <sys/kernel.h> 41 #include <sys/systm.h> 42 #include <sys/mbuf.h> 43 #include <sys/proc.h> 44 #include <sys/sysctl.h> 45 #include <sys/once.h> 46 47 #include <machine/stdarg.h> 48 49 #include <sys/socket.h> 50 51 #include <net/if.h> 52 #include <net/if_media.h> 53 #include <net/if_ether.h> 54 #include <net/route.h> 55 56 #include <net80211/ieee80211_netbsd.h> 57 #include <net80211/ieee80211_var.h> 58 #include <net80211/ieee80211_sysctl.h> 59 60 #define LOGICALLY_EQUAL(x, y) (!(x) == !(y)) 61 62 static void ieee80211_sysctl_fill_node(struct ieee80211_node *, 63 struct ieee80211_node_sysctl *, int, const struct ieee80211_channel *, 64 uint32_t); 65 static struct ieee80211_node *ieee80211_node_walknext( 66 struct ieee80211_node_walk *); 67 static struct ieee80211_node *ieee80211_node_walkfirst( 68 struct ieee80211_node_walk *, u_short); 69 static int ieee80211_sysctl_node(SYSCTLFN_ARGS); 70 71 #ifdef IEEE80211_DEBUG 72 int ieee80211_debug = 0; 73 #endif 74 75 typedef void (*ieee80211_setup_func)(void); 76 77 __link_set_decl(ieee80211_funcs, ieee80211_setup_func); 78 79 static int 80 ieee80211_init0(void) 81 { 82 ieee80211_setup_func * const *ieee80211_setup, f; 83 84 __link_set_foreach(ieee80211_setup, ieee80211_funcs) { 85 f = (void*)*ieee80211_setup; 86 (*f)(); 87 } 88 89 return 0; 90 } 91 92 void 93 ieee80211_init(void) 94 { 95 static ONCE_DECL(ieee80211_init_once); 96 97 RUN_ONCE(&ieee80211_init_once, ieee80211_init0); 98 } 99 100 static int 101 ieee80211_sysctl_inact(SYSCTLFN_ARGS) 102 { 103 int error, t; 104 struct sysctlnode node; 105 106 node = *rnode; 107 /* sysctl_lookup copies the product from t. Then, it 108 * copies the new value onto t. 109 */ 110 t = *(int*)rnode->sysctl_data * IEEE80211_INACT_WAIT; 111 node.sysctl_data = &t; 112 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 113 if (error || newp == NULL) 114 return (error); 115 116 /* The new value was in seconds. Convert to inactivity-wait 117 * intervals. There are IEEE80211_INACT_WAIT seconds per 118 * interval. 119 */ 120 *(int*)rnode->sysctl_data = t / IEEE80211_INACT_WAIT; 121 122 return (0); 123 } 124 125 static int 126 ieee80211_sysctl_parent(SYSCTLFN_ARGS) 127 { 128 struct ieee80211com *ic; 129 char pname[IFNAMSIZ]; 130 struct sysctlnode node; 131 132 node = *rnode; 133 ic = node.sysctl_data; 134 strncpy(pname, ic->ic_ifp->if_xname, IFNAMSIZ); 135 node.sysctl_data = pname; 136 return sysctl_lookup(SYSCTLFN_CALL(&node)); 137 } 138 139 /* 140 * Create or get top of sysctl tree net.link.ieee80211. 141 */ 142 static const struct sysctlnode * 143 ieee80211_sysctl_treetop(struct sysctllog **log) 144 { 145 int rc; 146 const struct sysctlnode *rnode; 147 148 if ((rc = sysctl_createv(log, 0, NULL, &rnode, 149 CTLFLAG_PERMANENT, CTLTYPE_NODE, "net", NULL, 150 NULL, 0, NULL, 0, CTL_NET, CTL_EOL)) != 0) 151 goto err; 152 153 if ((rc = sysctl_createv(log, 0, &rnode, &rnode, 154 CTLFLAG_PERMANENT, CTLTYPE_NODE, "link", 155 "link-layer statistics and controls", 156 NULL, 0, NULL, 0, PF_LINK, CTL_EOL)) != 0) 157 goto err; 158 159 if ((rc = sysctl_createv(log, 0, &rnode, &rnode, 160 CTLFLAG_PERMANENT, CTLTYPE_NODE, "ieee80211", 161 "IEEE 802.11 WLAN statistics and controls", 162 NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0) 163 goto err; 164 165 return rnode; 166 err: 167 printf("%s: sysctl_createv failed, rc = %d\n", __func__, rc); 168 return NULL; 169 } 170 171 void 172 ieee80211_sysctl_attach(struct ieee80211com *ic) 173 { 174 int rc; 175 const struct sysctlnode *cnode, *rnode; 176 char num[sizeof("vap") + 14]; /* sufficient for 32 bits */ 177 178 if ((rnode = ieee80211_sysctl_treetop(NULL)) == NULL) 179 return; 180 181 snprintf(num, sizeof(num), "vap%u", ic->ic_vap); 182 183 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &rnode, 184 CTLFLAG_PERMANENT, CTLTYPE_NODE, num, SYSCTL_DESCR("virtual AP"), 185 NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0) 186 goto err; 187 188 /* control debugging printfs */ 189 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 190 CTLFLAG_PERMANENT|CTLFLAG_READONLY, CTLTYPE_STRING, 191 "parent", SYSCTL_DESCR("parent device"), 192 ieee80211_sysctl_parent, 0, ic, IFNAMSIZ, CTL_CREATE, 193 CTL_EOL)) != 0) 194 goto err; 195 196 #ifdef IEEE80211_DEBUG 197 /* control debugging printfs */ 198 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 199 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 200 "debug", SYSCTL_DESCR("control debugging printfs"), 201 NULL, ieee80211_debug, &ic->ic_debug, 0, 202 CTL_CREATE, CTL_EOL)) != 0) 203 goto err; 204 #endif 205 /* XXX inherit from tunables */ 206 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 207 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 208 "inact_run", SYSCTL_DESCR("station inactivity timeout (sec)"), 209 ieee80211_sysctl_inact, 0, &ic->ic_inact_run, 0, 210 CTL_CREATE, CTL_EOL)) != 0) 211 goto err; 212 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 213 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 214 "inact_probe", 215 SYSCTL_DESCR("station inactivity probe timeout (sec)"), 216 ieee80211_sysctl_inact, 0, &ic->ic_inact_probe, 0, 217 CTL_CREATE, CTL_EOL)) != 0) 218 goto err; 219 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 220 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 221 "inact_auth", 222 SYSCTL_DESCR("station authentication timeout (sec)"), 223 ieee80211_sysctl_inact, 0, &ic->ic_inact_auth, 0, 224 CTL_CREATE, CTL_EOL)) != 0) 225 goto err; 226 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 227 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 228 "inact_init", 229 SYSCTL_DESCR("station initial state timeout (sec)"), 230 ieee80211_sysctl_inact, 0, &ic->ic_inact_init, 0, 231 CTL_CREATE, CTL_EOL)) != 0) 232 goto err; 233 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 234 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 235 "driver_caps", SYSCTL_DESCR("driver capabilities"), 236 NULL, 0, &ic->ic_caps, 0, CTL_CREATE, CTL_EOL)) != 0) 237 goto err; 238 239 return; 240 err: 241 printf("%s: sysctl_createv failed, rc = %d\n", __func__, rc); 242 } 243 244 void 245 ieee80211_sysctl_detach(struct ieee80211com *ic) 246 { 247 sysctl_teardown(&ic->ic_sysctllog); 248 } 249 250 /* 251 * Pointers for testing: 252 * 253 * If there are no interfaces, or else no 802.11 interfaces, 254 * ieee80211_node_walkfirst must return NULL. 255 * 256 * If there is any single 802.11 interface, ieee80211_node_walkfirst 257 * must not return NULL. 258 */ 259 static struct ieee80211_node * 260 ieee80211_node_walkfirst(struct ieee80211_node_walk *nw, u_short if_index) 261 { 262 (void)memset(nw, 0, sizeof(*nw)); 263 264 nw->nw_ifindex = if_index; 265 266 LIST_FOREACH(nw->nw_ic, &ieee80211com_head, ic_list) { 267 if (if_index != 0 && nw->nw_ic->ic_ifp->if_index != if_index) 268 continue; 269 if (!TAILQ_EMPTY(&nw->nw_ic->ic_sta.nt_node)) 270 nw->nw_nt = &nw->nw_ic->ic_sta; 271 else if (!TAILQ_EMPTY(&nw->nw_ic->ic_scan.nt_node)) 272 nw->nw_nt = &nw->nw_ic->ic_scan; 273 else if (nw->nw_ic->ic_bss == NULL) 274 continue; 275 break; 276 } 277 278 if (nw->nw_ic == NULL) 279 return NULL; 280 281 if (nw->nw_nt == NULL) 282 nw->nw_ni = nw->nw_ic->ic_bss; 283 else 284 nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node); 285 286 return nw->nw_ni; 287 } 288 289 static struct ieee80211_node * 290 ieee80211_node_walknext(struct ieee80211_node_walk *nw) 291 { 292 if (nw->nw_nt != NULL) 293 nw->nw_ni = TAILQ_NEXT(nw->nw_ni, ni_list); 294 else 295 nw->nw_ni = NULL; 296 297 while (nw->nw_ni == NULL) { 298 if (nw->nw_nt == &nw->nw_ic->ic_sta) { 299 nw->nw_nt = &nw->nw_ic->ic_scan; 300 nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node); 301 continue; 302 } else if (nw->nw_nt == &nw->nw_ic->ic_scan) { 303 nw->nw_nt = NULL; 304 nw->nw_ni = nw->nw_ic->ic_bss; 305 continue; 306 } 307 KASSERT(nw->nw_nt == NULL); 308 if (nw->nw_ifindex != 0) 309 return NULL; 310 311 nw->nw_ic = LIST_NEXT(nw->nw_ic, ic_list); 312 if (nw->nw_ic == NULL) 313 return NULL; 314 315 nw->nw_nt = &nw->nw_ic->ic_sta; 316 nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node); 317 } 318 319 return nw->nw_ni; 320 } 321 322 static void 323 ieee80211_sysctl_fill_node(struct ieee80211_node *ni, 324 struct ieee80211_node_sysctl *ns, int ifindex, 325 const struct ieee80211_channel *chan0, uint32_t flags) 326 { 327 ns->ns_ifindex = ifindex; 328 ns->ns_capinfo = ni->ni_capinfo; 329 ns->ns_flags = flags; 330 (void)memcpy(ns->ns_macaddr, ni->ni_macaddr, sizeof(ns->ns_macaddr)); 331 (void)memcpy(ns->ns_bssid, ni->ni_bssid, sizeof(ns->ns_bssid)); 332 if (ni->ni_chan != IEEE80211_CHAN_ANYC) { 333 ns->ns_freq = ni->ni_chan->ic_freq; 334 ns->ns_chanflags = ni->ni_chan->ic_flags; 335 ns->ns_chanidx = ni->ni_chan - chan0; 336 } else { 337 ns->ns_freq = ns->ns_chanflags = 0; 338 ns->ns_chanidx = 0; 339 } 340 ns->ns_rssi = ni->ni_rssi; 341 ns->ns_esslen = ni->ni_esslen; 342 (void)memcpy(ns->ns_essid, ni->ni_essid, sizeof(ns->ns_essid)); 343 ns->ns_erp = ni->ni_erp; 344 ns->ns_associd = ni->ni_associd; 345 ns->ns_inact = ni->ni_inact * IEEE80211_INACT_WAIT; 346 ns->ns_rstamp = ni->ni_rstamp; 347 ns->ns_rates = ni->ni_rates; 348 ns->ns_txrate = ni->ni_txrate; 349 ns->ns_intval = ni->ni_intval; 350 (void)memcpy(ns->ns_tstamp, &ni->ni_tstamp, sizeof(ns->ns_tstamp)); 351 ns->ns_txseq = ni->ni_txseqs[0]; 352 ns->ns_rxseq = ni->ni_rxseqs[0]; 353 ns->ns_fhdwell = ni->ni_fhdwell; 354 ns->ns_fhindex = ni->ni_fhindex; 355 ns->ns_fails = ni->ni_fails; 356 } 357 358 /* Between two examinations of the sysctl tree, I expect each 359 * interface to add no more than 5 nodes. 360 */ 361 #define IEEE80211_SYSCTL_NODE_GROWTH 5 362 363 static int 364 ieee80211_sysctl_node(SYSCTLFN_ARGS) 365 { 366 struct ieee80211_node_walk nw; 367 struct ieee80211_node *ni; 368 struct ieee80211_node_sysctl ns; 369 char *dp; 370 u_int cur_ifindex, ifcount, ifindex, last_ifindex, op, arg, hdr_type; 371 uint32_t flags; 372 size_t len, needed, eltsize, out_size; 373 int error, s, saw_bss = 0, nelt; 374 375 if (namelen == 1 && name[0] == CTL_QUERY) 376 return (sysctl_query(SYSCTLFN_CALL(rnode))); 377 378 if (namelen != IEEE80211_SYSCTL_NODENAMELEN) 379 return (EINVAL); 380 381 /* ifindex.op.arg.header-type.eltsize.nelt */ 382 dp = oldp; 383 len = (oldp != NULL) ? *oldlenp : 0; 384 ifindex = name[IEEE80211_SYSCTL_NODENAME_IF]; 385 op = name[IEEE80211_SYSCTL_NODENAME_OP]; 386 arg = name[IEEE80211_SYSCTL_NODENAME_ARG]; 387 hdr_type = name[IEEE80211_SYSCTL_NODENAME_TYPE]; 388 eltsize = name[IEEE80211_SYSCTL_NODENAME_ELTSIZE]; 389 nelt = name[IEEE80211_SYSCTL_NODENAME_ELTCOUNT]; 390 out_size = MIN(sizeof(ns), eltsize); 391 392 if (op != IEEE80211_SYSCTL_OP_ALL || arg != 0 || 393 hdr_type != IEEE80211_SYSCTL_T_NODE || eltsize < 1 || nelt < 0) 394 return (EINVAL); 395 396 error = 0; 397 needed = 0; 398 ifcount = 0; 399 last_ifindex = 0; 400 401 s = splnet(); 402 403 for (ni = ieee80211_node_walkfirst(&nw, ifindex); ni != NULL; 404 ni = ieee80211_node_walknext(&nw)) { 405 struct ieee80211com *ic; 406 407 ic = nw.nw_ic; 408 cur_ifindex = ic->ic_ifp->if_index; 409 410 if (cur_ifindex != last_ifindex) { 411 saw_bss = 0; 412 ifcount++; 413 last_ifindex = cur_ifindex; 414 } 415 416 if (nelt <= 0) 417 continue; 418 419 if (saw_bss && ni == ic->ic_bss) 420 continue; 421 else if (ni == ic->ic_bss) { 422 saw_bss = 1; 423 flags = IEEE80211_NODE_SYSCTL_F_BSS; 424 } else 425 flags = 0; 426 if (ni->ni_table == &ic->ic_scan) 427 flags |= IEEE80211_NODE_SYSCTL_F_SCAN; 428 else if (ni->ni_table == &ic->ic_sta) 429 flags |= IEEE80211_NODE_SYSCTL_F_STA; 430 if (len >= eltsize) { 431 ieee80211_sysctl_fill_node(ni, &ns, cur_ifindex, 432 &ic->ic_channels[0], flags); 433 error = copyout(&ns, dp, out_size); 434 if (error) 435 goto cleanup; 436 dp += eltsize; 437 len -= eltsize; 438 } 439 needed += eltsize; 440 if (nelt != INT_MAX) 441 nelt--; 442 } 443 cleanup: 444 splx(s); 445 446 *oldlenp = needed; 447 if (oldp == NULL) 448 *oldlenp += ifcount * IEEE80211_SYSCTL_NODE_GROWTH * eltsize; 449 450 return (error); 451 } 452 453 /* 454 * Setup sysctl(3) MIB, net.ieee80211.* 455 * 456 * TBD condition CTLFLAG_PERMANENT on being an LKM or not 457 */ 458 SYSCTL_SETUP(sysctl_ieee80211, "sysctl ieee80211 subtree setup") 459 { 460 int rc; 461 const struct sysctlnode *cnode, *rnode; 462 463 if ((rnode = ieee80211_sysctl_treetop(clog)) == NULL) 464 return; 465 466 if ((rc = sysctl_createv(clog, 0, &rnode, NULL, 467 CTLFLAG_PERMANENT, CTLTYPE_NODE, "nodes", "client/peer stations", 468 ieee80211_sysctl_node, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0) 469 goto err; 470 471 #ifdef IEEE80211_DEBUG 472 /* control debugging printfs */ 473 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode, 474 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 475 "debug", SYSCTL_DESCR("control debugging printfs"), 476 NULL, 0, &ieee80211_debug, 0, CTL_CREATE, CTL_EOL)) != 0) 477 goto err; 478 #endif /* IEEE80211_DEBUG */ 479 480 return; 481 err: 482 printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); 483 } 484 485 int 486 ieee80211_node_dectestref(struct ieee80211_node *ni) 487 { 488 int rc, s; 489 s = splnet(); 490 if (--ni->ni_refcnt == 0) { 491 rc = 1; 492 ni->ni_refcnt = 1; 493 } else 494 rc = 0; 495 splx(s); 496 return rc; 497 } 498 499 void 500 if_printf(struct ifnet *ifp, const char *fmt, ...) 501 { 502 va_list ap; 503 va_start(ap, fmt); 504 505 printf("%s: ", ifp->if_xname); 506 vprintf(fmt, ap); 507 508 va_end(ap); 509 return; 510 } 511 512 /* 513 * Append the specified data to the indicated mbuf chain, 514 * Extend the mbuf chain if the new data does not fit in 515 * existing space. 516 * 517 * Return 1 if able to complete the job; otherwise 0. 518 */ 519 int 520 m_append(struct mbuf *m0, int len, caddr_t cp) 521 { 522 struct mbuf *m, *n; 523 int remainder, space; 524 525 for (m = m0; m->m_next != NULL; m = m->m_next) 526 ; 527 remainder = len; 528 space = M_TRAILINGSPACE(m); 529 if (space > 0) { 530 /* 531 * Copy into available space. 532 */ 533 if (space > remainder) 534 space = remainder; 535 memmove(mtod(m, caddr_t) + m->m_len, cp, space); 536 m->m_len += space; 537 cp += space, remainder -= space; 538 } 539 while (remainder > 0) { 540 /* 541 * Allocate a new mbuf; could check space 542 * and allocate a cluster instead. 543 */ 544 n = m_get(M_DONTWAIT, m->m_type); 545 if (n == NULL) 546 break; 547 n->m_len = min(MLEN, remainder); 548 memmove(mtod(n, caddr_t), cp, n->m_len); 549 cp += n->m_len, remainder -= n->m_len; 550 m->m_next = n; 551 m = n; 552 } 553 if (m0->m_flags & M_PKTHDR) 554 m0->m_pkthdr.len += len - remainder; 555 return (remainder == 0); 556 } 557 558 /* 559 * Allocate and setup a management frame of the specified 560 * size. We return the mbuf and a pointer to the start 561 * of the contiguous data area that's been reserved based 562 * on the packet length. The data area is forced to 32-bit 563 * alignment and the buffer length to a multiple of 4 bytes. 564 * This is done mainly so beacon frames (that require this) 565 * can use this interface too. 566 */ 567 struct mbuf * 568 ieee80211_getmgtframe(u_int8_t **frm, u_int pktlen) 569 { 570 struct mbuf *m; 571 u_int len; 572 573 /* 574 * NB: we know the mbuf routines will align the data area 575 * so we don't need to do anything special. 576 */ 577 /* XXX 4-address frame? */ 578 len = roundup(sizeof(struct ieee80211_frame) + pktlen, 4); 579 IASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 580 if (len <= MHLEN) { 581 m = m_gethdr(M_NOWAIT, MT_HEADER); 582 /* 583 * Align the data in case additional headers are added. 584 * This should only happen when a WEP header is added 585 * which only happens for shared key authentication mgt 586 * frames which all fit in MHLEN. 587 */ 588 if (m != NULL) 589 MH_ALIGN(m, len); 590 } else 591 m = m_getcl(M_NOWAIT, MT_HEADER, M_PKTHDR); 592 if (m != NULL) { 593 m->m_data += sizeof(struct ieee80211_frame); 594 *frm = m->m_data; 595 IASSERT((uintptr_t)*frm % 4 == 0, ("bad beacon boundary")); 596 } 597 return m; 598 } 599 600 void 601 get_random_bytes(void *p, size_t n) 602 { 603 u_int8_t *dp = p; 604 605 while (n > 0) { 606 u_int32_t v = arc4random(); 607 size_t nb = n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n; 608 (void)memcpy(dp, &v, nb); 609 dp += sizeof(u_int32_t), n -= nb; 610 } 611 } 612 613 void 614 ieee80211_notify_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int newassoc) 615 { 616 struct ifnet *ifp = ic->ic_ifp; 617 struct ieee80211_join_event iev; 618 619 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, "%s: %snode %s join\n", 620 ifp->if_xname, (ni == ic->ic_bss) ? "bss " : "", 621 ether_sprintf(ni->ni_macaddr)); 622 623 memset(&iev, 0, sizeof(iev)); 624 if (ni == ic->ic_bss) { 625 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_bssid); 626 rt_ieee80211msg(ifp, newassoc ? 627 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, 628 &iev, sizeof(iev)); 629 if_link_state_change(ifp, LINK_STATE_UP); 630 } else if (newassoc) { 631 /* fire off wireless event only for new station */ 632 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr); 633 rt_ieee80211msg(ifp, RTM_IEEE80211_JOIN, &iev, sizeof(iev)); 634 } 635 } 636 637 void 638 ieee80211_notify_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 639 { 640 struct ifnet *ifp = ic->ic_ifp; 641 struct ieee80211_leave_event iev; 642 643 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, "%s: %snode %s leave\n", 644 ifp->if_xname, (ni == ic->ic_bss) ? "bss " : "", 645 ether_sprintf(ni->ni_macaddr)); 646 647 if (ni == ic->ic_bss) { 648 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 649 if_link_state_change(ifp, LINK_STATE_DOWN); 650 } else { 651 /* fire off wireless event station leaving */ 652 memset(&iev, 0, sizeof(iev)); 653 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr); 654 rt_ieee80211msg(ifp, RTM_IEEE80211_LEAVE, &iev, sizeof(iev)); 655 } 656 } 657 658 void 659 ieee80211_notify_scan_done(struct ieee80211com *ic) 660 { 661 struct ifnet *ifp = ic->ic_ifp; 662 663 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 664 "%s: notify scan done\n", ic->ic_ifp->if_xname); 665 666 /* dispatch wireless event indicating scan completed */ 667 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 668 } 669 670 void 671 ieee80211_notify_replay_failure(struct ieee80211com *ic, 672 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 673 u_int64_t rsc) 674 { 675 struct ifnet *ifp = ic->ic_ifp; 676 677 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 678 "[%s] %s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>\n", 679 ether_sprintf(wh->i_addr2), k->wk_cipher->ic_name, 680 (intmax_t) rsc, (intmax_t) k->wk_keyrsc, 681 k->wk_keyix, k->wk_rxkeyix); 682 683 if (ifp != NULL) { /* NB: for cipher test modules */ 684 struct ieee80211_replay_event iev; 685 686 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 687 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 688 iev.iev_cipher = k->wk_cipher->ic_cipher; 689 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 690 iev.iev_keyix = k->wk_rxkeyix; 691 else 692 iev.iev_keyix = k->wk_keyix; 693 iev.iev_keyrsc = k->wk_keyrsc; 694 iev.iev_rsc = rsc; 695 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 696 } 697 } 698 699 void 700 ieee80211_notify_michael_failure(struct ieee80211com *ic, 701 const struct ieee80211_frame *wh, u_int keyix) 702 { 703 struct ifnet *ifp = ic->ic_ifp; 704 705 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 706 "[%s] michael MIC verification failed <keyix %u>\n", 707 ether_sprintf(wh->i_addr2), keyix); 708 ic->ic_stats.is_rx_tkipmic++; 709 710 if (ifp != NULL) { /* NB: for cipher test modules */ 711 struct ieee80211_michael_event iev; 712 713 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 714 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 715 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 716 iev.iev_keyix = keyix; 717 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 718 } 719 } 720 721 void 722 ieee80211_load_module(const char *modname) 723 { 724 #ifdef notyet 725 struct thread *td = curthread; 726 727 if (suser(td) == 0 && securelevel_gt(td->td_ucred, 0) == 0) { 728 mtx_lock(&Giant); 729 (void) linker_load_module(modname, NULL, NULL, NULL, NULL); 730 mtx_unlock(&Giant); 731 } 732 #else 733 printf("%s: load the %s module by hand for now.\n", __func__, modname); 734 #endif 735 } 736
Indexes created Fri Sep 26 20:09:58 GMT 2025