ieee80211_netbsd.c revision 1.7.8.2
1 /* $NetBSD: ieee80211_netbsd.c,v 1.7.8.2 2005/11/29 21:23:30 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 1.7.8.2 2005/11/29 21:23:30 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 void 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 90 void 91 ieee80211_init(void) 92 { 93 static ONCE_DECL(ieee80211_init_once); 94 95 RUN_ONCE(&ieee80211_init_once, ieee80211_init0); 96 } 97 98 static int 99 ieee80211_sysctl_inact(SYSCTLFN_ARGS) 100 { 101 int error, t; 102 struct sysctlnode node; 103 104 node = *rnode; 105 /* sysctl_lookup copies the product from t. Then, it 106 * copies the new value onto t. 107 */ 108 t = *(int*)rnode->sysctl_data * IEEE80211_INACT_WAIT; 109 node.sysctl_data = &t; 110 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 111 if (error || newp == NULL) 112 return (error); 113 114 /* The new value was in seconds. Convert to inactivity-wait 115 * intervals. There are IEEE80211_INACT_WAIT seconds per 116 * interval. 117 */ 118 *(int*)rnode->sysctl_data = t / IEEE80211_INACT_WAIT; 119 120 return (0); 121 } 122 123 static int 124 ieee80211_sysctl_parent(SYSCTLFN_ARGS) 125 { 126 struct ieee80211com *ic; 127 char pname[IFNAMSIZ]; 128 struct sysctlnode node; 129 130 node = *rnode; 131 ic = node.sysctl_data; 132 strncpy(pname, ic->ic_ifp->if_xname, IFNAMSIZ); 133 node.sysctl_data = pname; 134 return sysctl_lookup(SYSCTLFN_CALL(&node)); 135 } 136 137 /* 138 * Create or get top of sysctl tree net.link.ieee80211. 139 */ 140 static const struct sysctlnode * 141 ieee80211_sysctl_treetop(struct sysctllog **log) 142 { 143 int rc; 144 const struct sysctlnode *rnode; 145 146 if ((rc = sysctl_createv(log, 0, NULL, &rnode, 147 CTLFLAG_PERMANENT, CTLTYPE_NODE, "net", NULL, 148 NULL, 0, NULL, 0, CTL_NET, CTL_EOL)) != 0) 149 goto err; 150 151 if ((rc = sysctl_createv(log, 0, &rnode, &rnode, 152 CTLFLAG_PERMANENT, CTLTYPE_NODE, "link", 153 "link-layer statistics and controls", 154 NULL, 0, NULL, 0, PF_LINK, CTL_EOL)) != 0) 155 goto err; 156 157 if ((rc = sysctl_createv(log, 0, &rnode, &rnode, 158 CTLFLAG_PERMANENT, CTLTYPE_NODE, "ieee80211", 159 "IEEE 802.11 WLAN statistics and controls", 160 NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0) 161 goto err; 162 163 return rnode; 164 err: 165 printf("%s: sysctl_createv failed, rc = %d\n", __func__, rc); 166 return NULL; 167 } 168 169 void 170 ieee80211_sysctl_attach(struct ieee80211com *ic) 171 { 172 int rc; 173 const struct sysctlnode *cnode, *rnode; 174 char num[sizeof("vap") + 14]; /* sufficient for 32 bits */ 175 176 if ((rnode = ieee80211_sysctl_treetop(NULL)) == NULL) 177 return; 178 179 snprintf(num, sizeof(num), "vap%u", ic->ic_vap); 180 181 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &rnode, 182 CTLFLAG_PERMANENT, CTLTYPE_NODE, num, SYSCTL_DESCR("virtual AP"), 183 NULL, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0) 184 goto err; 185 186 /* control debugging printfs */ 187 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 188 CTLFLAG_PERMANENT|CTLFLAG_READONLY, CTLTYPE_STRING, 189 "parent", SYSCTL_DESCR("parent device"), 190 ieee80211_sysctl_parent, 0, ic, IFNAMSIZ, CTL_CREATE, 191 CTL_EOL)) != 0) 192 goto err; 193 194 #ifdef IEEE80211_DEBUG 195 /* control debugging printfs */ 196 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 197 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 198 "debug", SYSCTL_DESCR("control debugging printfs"), 199 NULL, ieee80211_debug, &ic->ic_debug, 0, 200 CTL_CREATE, CTL_EOL)) != 0) 201 goto err; 202 #endif 203 /* XXX inherit from tunables */ 204 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 205 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 206 "inact_run", SYSCTL_DESCR("station inactivity timeout (sec)"), 207 ieee80211_sysctl_inact, 0, &ic->ic_inact_run, 0, 208 CTL_CREATE, CTL_EOL)) != 0) 209 goto err; 210 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 211 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 212 "inact_probe", 213 SYSCTL_DESCR("station inactivity probe timeout (sec)"), 214 ieee80211_sysctl_inact, 0, &ic->ic_inact_probe, 0, 215 CTL_CREATE, CTL_EOL)) != 0) 216 goto err; 217 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 218 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 219 "inact_auth", 220 SYSCTL_DESCR("station authentication timeout (sec)"), 221 ieee80211_sysctl_inact, 0, &ic->ic_inact_auth, 0, 222 CTL_CREATE, CTL_EOL)) != 0) 223 goto err; 224 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 226 "inact_init", 227 SYSCTL_DESCR("station initial state timeout (sec)"), 228 ieee80211_sysctl_inact, 0, &ic->ic_inact_init, 0, 229 CTL_CREATE, CTL_EOL)) != 0) 230 goto err; 231 if ((rc = sysctl_createv(&ic->ic_sysctllog, 0, &rnode, &cnode, 232 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 233 "driver_caps", SYSCTL_DESCR("driver capabilities"), 234 NULL, 0, &ic->ic_caps, 0, CTL_CREATE, CTL_EOL)) != 0) 235 goto err; 236 237 return; 238 err: 239 printf("%s: sysctl_createv failed, rc = %d\n", __func__, rc); 240 } 241 242 void 243 ieee80211_sysctl_detach(struct ieee80211com *ic) 244 { 245 sysctl_teardown(&ic->ic_sysctllog); 246 } 247 248 /* 249 * Pointers for testing: 250 * 251 * If there are no interfaces, or else no 802.11 interfaces, 252 * ieee80211_node_walkfirst must return NULL. 253 * 254 * If there is any single 802.11 interface, ieee80211_node_walkfirst 255 * must not return NULL. 256 */ 257 static struct ieee80211_node * 258 ieee80211_node_walkfirst(struct ieee80211_node_walk *nw, u_short if_index) 259 { 260 (void)memset(nw, 0, sizeof(*nw)); 261 262 nw->nw_ifindex = if_index; 263 264 LIST_FOREACH(nw->nw_ic, &ieee80211com_head, ic_list) { 265 if (if_index != 0 && nw->nw_ic->ic_ifp->if_index != if_index) 266 continue; 267 if (!TAILQ_EMPTY(&nw->nw_ic->ic_sta.nt_node)) 268 nw->nw_nt = &nw->nw_ic->ic_sta; 269 else if (!TAILQ_EMPTY(&nw->nw_ic->ic_scan.nt_node)) 270 nw->nw_nt = &nw->nw_ic->ic_scan; 271 else if (nw->nw_ic->ic_bss == NULL) 272 continue; 273 break; 274 } 275 276 if (nw->nw_ic == NULL) 277 return NULL; 278 279 if (nw->nw_nt == NULL) 280 nw->nw_ni = nw->nw_ic->ic_bss; 281 else 282 nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node); 283 284 return nw->nw_ni; 285 } 286 287 static struct ieee80211_node * 288 ieee80211_node_walknext(struct ieee80211_node_walk *nw) 289 { 290 if (nw->nw_nt != NULL) 291 nw->nw_ni = TAILQ_NEXT(nw->nw_ni, ni_list); 292 else 293 nw->nw_ni = NULL; 294 295 while (nw->nw_ni == NULL) { 296 if (nw->nw_nt == &nw->nw_ic->ic_sta) { 297 nw->nw_nt = &nw->nw_ic->ic_scan; 298 nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node); 299 continue; 300 } else if (nw->nw_nt == &nw->nw_ic->ic_scan) { 301 nw->nw_nt = NULL; 302 nw->nw_ni = nw->nw_ic->ic_bss; 303 continue; 304 } 305 KASSERT(nw->nw_nt == NULL); 306 if (nw->nw_ifindex != 0) 307 return NULL; 308 309 nw->nw_ic = LIST_NEXT(nw->nw_ic, ic_list); 310 if (nw->nw_ic == NULL) 311 return NULL; 312 313 nw->nw_nt = &nw->nw_ic->ic_sta; 314 nw->nw_ni = TAILQ_FIRST(&nw->nw_nt->nt_node); 315 } 316 317 return nw->nw_ni; 318 } 319 320 static void 321 ieee80211_sysctl_fill_node(struct ieee80211_node *ni, 322 struct ieee80211_node_sysctl *ns, int ifindex, 323 const struct ieee80211_channel *chan0, uint32_t flags) 324 { 325 ns->ns_ifindex = ifindex; 326 ns->ns_capinfo = ni->ni_capinfo; 327 ns->ns_flags = flags; 328 (void)memcpy(ns->ns_macaddr, ni->ni_macaddr, sizeof(ns->ns_macaddr)); 329 (void)memcpy(ns->ns_bssid, ni->ni_bssid, sizeof(ns->ns_bssid)); 330 if (ni->ni_chan != IEEE80211_CHAN_ANYC) { 331 ns->ns_freq = ni->ni_chan->ic_freq; 332 ns->ns_chanflags = ni->ni_chan->ic_flags; 333 ns->ns_chanidx = ni->ni_chan - chan0; 334 } else { 335 ns->ns_freq = ns->ns_chanflags = 0; 336 ns->ns_chanidx = 0; 337 } 338 ns->ns_rssi = ni->ni_rssi; 339 ns->ns_esslen = ni->ni_esslen; 340 (void)memcpy(ns->ns_essid, ni->ni_essid, sizeof(ns->ns_essid)); 341 ns->ns_erp = ni->ni_erp; 342 ns->ns_associd = ni->ni_associd; 343 ns->ns_inact = ni->ni_inact * IEEE80211_INACT_WAIT; 344 ns->ns_rstamp = ni->ni_rstamp; 345 ns->ns_rates = ni->ni_rates; 346 ns->ns_txrate = ni->ni_txrate; 347 ns->ns_intval = ni->ni_intval; 348 (void)memcpy(ns->ns_tstamp, &ni->ni_tstamp, sizeof(ns->ns_tstamp)); 349 ns->ns_txseq = ni->ni_txseqs[0]; 350 ns->ns_rxseq = ni->ni_rxseqs[0]; 351 ns->ns_fhdwell = ni->ni_fhdwell; 352 ns->ns_fhindex = ni->ni_fhindex; 353 ns->ns_fails = ni->ni_fails; 354 } 355 356 /* Between two examinations of the sysctl tree, I expect each 357 * interface to add no more than 5 nodes. 358 */ 359 #define IEEE80211_SYSCTL_NODE_GROWTH 5 360 361 static int 362 ieee80211_sysctl_node(SYSCTLFN_ARGS) 363 { 364 struct ieee80211_node_walk nw; 365 struct ieee80211_node *ni; 366 struct ieee80211_node_sysctl ns; 367 char *dp; 368 u_int cur_ifindex, ifcount, ifindex, last_ifindex, op, arg, hdr_type; 369 uint32_t flags; 370 size_t len, needed, eltsize, out_size; 371 int error, s, saw_bss = 0, nelt; 372 373 if (namelen == 1 && name[0] == CTL_QUERY) 374 return (sysctl_query(SYSCTLFN_CALL(rnode))); 375 376 if (namelen != IEEE80211_SYSCTL_NODENAMELEN) 377 return (EINVAL); 378 379 /* ifindex.op.arg.header-type.eltsize.nelt */ 380 dp = oldp; 381 len = (oldp != NULL) ? *oldlenp : 0; 382 ifindex = name[IEEE80211_SYSCTL_NODENAME_IF]; 383 op = name[IEEE80211_SYSCTL_NODENAME_OP]; 384 arg = name[IEEE80211_SYSCTL_NODENAME_ARG]; 385 hdr_type = name[IEEE80211_SYSCTL_NODENAME_TYPE]; 386 eltsize = name[IEEE80211_SYSCTL_NODENAME_ELTSIZE]; 387 nelt = name[IEEE80211_SYSCTL_NODENAME_ELTCOUNT]; 388 out_size = MIN(sizeof(ns), eltsize); 389 390 if (op != IEEE80211_SYSCTL_OP_ALL || arg != 0 || 391 hdr_type != IEEE80211_SYSCTL_T_NODE || eltsize < 1 || nelt < 0) 392 return (EINVAL); 393 394 error = 0; 395 needed = 0; 396 ifcount = 0; 397 last_ifindex = 0; 398 399 s = splnet(); 400 401 for (ni = ieee80211_node_walkfirst(&nw, ifindex); ni != NULL; 402 ni = ieee80211_node_walknext(&nw)) { 403 struct ieee80211com *ic; 404 405 ic = nw.nw_ic; 406 cur_ifindex = ic->ic_ifp->if_index; 407 408 if (cur_ifindex != last_ifindex) { 409 saw_bss = 0; 410 ifcount++; 411 last_ifindex = cur_ifindex; 412 } 413 414 if (nelt <= 0) 415 continue; 416 417 if (saw_bss && ni == ic->ic_bss) 418 continue; 419 else if (ni == ic->ic_bss) { 420 saw_bss = 1; 421 flags = IEEE80211_NODE_SYSCTL_F_BSS; 422 } else 423 flags = 0; 424 if (ni->ni_table == &ic->ic_scan) 425 flags |= IEEE80211_NODE_SYSCTL_F_SCAN; 426 else if (ni->ni_table == &ic->ic_sta) 427 flags |= IEEE80211_NODE_SYSCTL_F_STA; 428 if (len >= eltsize) { 429 ieee80211_sysctl_fill_node(ni, &ns, cur_ifindex, 430 &ic->ic_channels[0], flags); 431 error = copyout(&ns, dp, out_size); 432 if (error) 433 goto cleanup; 434 dp += eltsize; 435 len -= eltsize; 436 } 437 needed += eltsize; 438 if (nelt != INT_MAX) 439 nelt--; 440 } 441 cleanup: 442 splx(s); 443 444 *oldlenp = needed; 445 if (oldp == NULL) 446 *oldlenp += ifcount * IEEE80211_SYSCTL_NODE_GROWTH * eltsize; 447 448 return (error); 449 } 450 451 /* 452 * Setup sysctl(3) MIB, net.ieee80211.* 453 * 454 * TBD condition CTLFLAG_PERMANENT on being an LKM or not 455 */ 456 SYSCTL_SETUP(sysctl_ieee80211, "sysctl ieee80211 subtree setup") 457 { 458 int rc; 459 const struct sysctlnode *cnode, *rnode; 460 461 if ((rnode = ieee80211_sysctl_treetop(clog)) == NULL) 462 return; 463 464 if ((rc = sysctl_createv(clog, 0, &rnode, NULL, 465 CTLFLAG_PERMANENT, CTLTYPE_NODE, "nodes", "client/peer stations", 466 ieee80211_sysctl_node, 0, NULL, 0, CTL_CREATE, CTL_EOL)) != 0) 467 goto err; 468 469 #ifdef IEEE80211_DEBUG 470 /* control debugging printfs */ 471 if ((rc = sysctl_createv(clog, 0, &rnode, &cnode, 472 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 473 "debug", SYSCTL_DESCR("control debugging printfs"), 474 NULL, 0, &ieee80211_debug, 0, CTL_CREATE, CTL_EOL)) != 0) 475 goto err; 476 #endif /* IEEE80211_DEBUG */ 477 478 return; 479 err: 480 printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc); 481 } 482 483 int 484 ieee80211_node_dectestref(struct ieee80211_node *ni) 485 { 486 int rc, s; 487 s = splnet(); 488 if (--ni->ni_refcnt == 0) { 489 rc = 1; 490 ni->ni_refcnt = 1; 491 } else 492 rc = 0; 493 splx(s); 494 return rc; 495 } 496 497 void 498 if_printf(struct ifnet *ifp, const char *fmt, ...) 499 { 500 va_list ap; 501 va_start(ap, fmt); 502 503 printf("%s: ", ifp->if_xname); 504 vprintf(fmt, ap); 505 506 va_end(ap); 507 return; 508 } 509 510 struct mbuf * 511 m_getcl(int how, int type, int flags) 512 { 513 struct mbuf *m; 514 515 if ((flags & M_PKTHDR) != 0) 516 MGETHDR(m, how, type); 517 else 518 MGET(m, how, type); 519 520 if (m == NULL) 521 return NULL; 522 523 MCLGET(m, flags); 524 525 if ((m->m_flags & M_EXT) == 0) { 526 m_free(m); 527 return NULL; 528 } 529 return m; 530 } 531 532 /* 533 * Append the specified data to the indicated mbuf chain, 534 * Extend the mbuf chain if the new data does not fit in 535 * existing space. 536 * 537 * Return 1 if able to complete the job; otherwise 0. 538 */ 539 int 540 m_append(struct mbuf *m0, int len, caddr_t cp) 541 { 542 struct mbuf *m, *n; 543 int remainder, space; 544 545 for (m = m0; m->m_next != NULL; m = m->m_next) 546 ; 547 remainder = len; 548 space = M_TRAILINGSPACE(m); 549 if (space > 0) { 550 /* 551 * Copy into available space. 552 */ 553 if (space > remainder) 554 space = remainder; 555 memmove(mtod(m, caddr_t) + m->m_len, cp, space); 556 m->m_len += space; 557 cp += space, remainder -= space; 558 } 559 while (remainder > 0) { 560 /* 561 * Allocate a new mbuf; could check space 562 * and allocate a cluster instead. 563 */ 564 n = m_get(M_DONTWAIT, m->m_type); 565 if (n == NULL) 566 break; 567 n->m_len = min(MLEN, remainder); 568 memmove(mtod(n, caddr_t), cp, n->m_len); 569 cp += n->m_len, remainder -= n->m_len; 570 m->m_next = n; 571 m = n; 572 } 573 if (m0->m_flags & M_PKTHDR) 574 m0->m_pkthdr.len += len - remainder; 575 return (remainder == 0); 576 } 577 578 /* 579 * Allocate and setup a management frame of the specified 580 * size. We return the mbuf and a pointer to the start 581 * of the contiguous data area that's been reserved based 582 * on the packet length. The data area is forced to 32-bit 583 * alignment and the buffer length to a multiple of 4 bytes. 584 * This is done mainly so beacon frames (that require this) 585 * can use this interface too. 586 */ 587 struct mbuf * 588 ieee80211_getmgtframe(u_int8_t **frm, u_int pktlen) 589 { 590 struct mbuf *m; 591 u_int len; 592 593 /* 594 * NB: we know the mbuf routines will align the data area 595 * so we don't need to do anything special. 596 */ 597 /* XXX 4-address frame? */ 598 len = roundup(sizeof(struct ieee80211_frame) + pktlen, 4); 599 IASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); 600 if (len <= MHLEN) { 601 m = m_gethdr(M_NOWAIT, MT_HEADER); 602 /* 603 * Align the data in case additional headers are added. 604 * This should only happen when a WEP header is added 605 * which only happens for shared key authentication mgt 606 * frames which all fit in MHLEN. 607 */ 608 if (m != NULL) 609 MH_ALIGN(m, len); 610 } else 611 m = m_getcl(M_NOWAIT, MT_HEADER, M_PKTHDR); 612 if (m != NULL) { 613 m->m_data += sizeof(struct ieee80211_frame); 614 *frm = m->m_data; 615 IASSERT((uintptr_t)*frm % 4 == 0, ("bad beacon boundary")); 616 } 617 return m; 618 } 619 620 void 621 get_random_bytes(void *p, size_t n) 622 { 623 u_int8_t *dp = p; 624 625 while (n > 0) { 626 u_int32_t v = arc4random(); 627 size_t nb = n > sizeof(u_int32_t) ? sizeof(u_int32_t) : n; 628 (void)memcpy(dp, &v, nb); 629 dp += sizeof(u_int32_t), n -= nb; 630 } 631 } 632 633 void 634 ieee80211_notify_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int newassoc) 635 { 636 struct ifnet *ifp = ic->ic_ifp; 637 struct ieee80211_join_event iev; 638 639 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, "%s: %snode %s join\n", 640 ifp->if_xname, (ni == ic->ic_bss) ? "bss " : "", 641 ether_sprintf(ni->ni_macaddr)); 642 643 memset(&iev, 0, sizeof(iev)); 644 if (ni == ic->ic_bss) { 645 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_bssid); 646 rt_ieee80211msg(ifp, newassoc ? 647 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, 648 &iev, sizeof(iev)); 649 if_link_state_change(ifp, LINK_STATE_UP); 650 } else if (newassoc) { 651 /* fire off wireless event only for new station */ 652 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr); 653 rt_ieee80211msg(ifp, RTM_IEEE80211_JOIN, &iev, sizeof(iev)); 654 } 655 } 656 657 void 658 ieee80211_notify_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 659 { 660 struct ifnet *ifp = ic->ic_ifp; 661 struct ieee80211_leave_event iev; 662 663 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, "%s: %snode %s leave\n", 664 ifp->if_xname, (ni == ic->ic_bss) ? "bss " : "", 665 ether_sprintf(ni->ni_macaddr)); 666 667 if (ni == ic->ic_bss) { 668 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); 669 if_link_state_change(ifp, LINK_STATE_DOWN); 670 } else { 671 /* fire off wireless event station leaving */ 672 memset(&iev, 0, sizeof(iev)); 673 IEEE80211_ADDR_COPY(iev.iev_addr, ni->ni_macaddr); 674 rt_ieee80211msg(ifp, RTM_IEEE80211_LEAVE, &iev, sizeof(iev)); 675 } 676 } 677 678 void 679 ieee80211_notify_scan_done(struct ieee80211com *ic) 680 { 681 struct ifnet *ifp = ic->ic_ifp; 682 683 IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 684 "%s: notify scan done\n", ic->ic_ifp->if_xname); 685 686 /* dispatch wireless event indicating scan completed */ 687 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); 688 } 689 690 void 691 ieee80211_notify_replay_failure(struct ieee80211com *ic, 692 const struct ieee80211_frame *wh, const struct ieee80211_key *k, 693 u_int64_t rsc) 694 { 695 struct ifnet *ifp = ic->ic_ifp; 696 697 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 698 "[%s] %s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>\n", 699 ether_sprintf(wh->i_addr2), k->wk_cipher->ic_name, 700 (intmax_t) rsc, (intmax_t) k->wk_keyrsc, 701 k->wk_keyix, k->wk_rxkeyix); 702 703 if (ifp != NULL) { /* NB: for cipher test modules */ 704 struct ieee80211_replay_event iev; 705 706 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 707 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 708 iev.iev_cipher = k->wk_cipher->ic_cipher; 709 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) 710 iev.iev_keyix = k->wk_rxkeyix; 711 else 712 iev.iev_keyix = k->wk_keyix; 713 iev.iev_keyrsc = k->wk_keyrsc; 714 iev.iev_rsc = rsc; 715 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); 716 } 717 } 718 719 void 720 ieee80211_notify_michael_failure(struct ieee80211com *ic, 721 const struct ieee80211_frame *wh, u_int keyix) 722 { 723 struct ifnet *ifp = ic->ic_ifp; 724 725 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO, 726 "[%s] michael MIC verification failed <keyix %u>\n", 727 ether_sprintf(wh->i_addr2), keyix); 728 ic->ic_stats.is_rx_tkipmic++; 729 730 if (ifp != NULL) { /* NB: for cipher test modules */ 731 struct ieee80211_michael_event iev; 732 733 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); 734 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); 735 iev.iev_cipher = IEEE80211_CIPHER_TKIP; 736 iev.iev_keyix = keyix; 737 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); 738 } 739 } 740 741 void 742 ieee80211_load_module(const char *modname) 743 { 744 #ifdef notyet 745 struct thread *td = curthread; 746 747 if (suser(td) == 0 && securelevel_gt(td->td_ucred, 0) == 0) { 748 mtx_lock(&Giant); 749 (void) linker_load_module(modname, NULL, NULL, NULL, NULL); 750 mtx_unlock(&Giant); 751 } 752 #else 753 printf("%s: load the %s module by hand for now.\n", __func__, modname); 754 #endif 755 } 756
Indexes created Fri Sep 26 20:09:58 GMT 2025