ieee80211_node.c revision 1.32.2.6
1 1.32.2.6 skrll /* $NetBSD: ieee80211_node.c,v 1.32.2.6 2004/10/19 15:58:11 skrll Exp $ */ 2 1.32.2.2 skrll /*- 3 1.32.2.2 skrll * Copyright (c) 2001 Atsushi Onoe 4 1.32.2.2 skrll * Copyright (c) 2002-2004 Sam Leffler, Errno Consulting 5 1.32.2.2 skrll * All rights reserved. 6 1.32.2.2 skrll * 7 1.32.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.32.2.2 skrll * modification, are permitted provided that the following conditions 9 1.32.2.2 skrll * are met: 10 1.32.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.32.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.32.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.32.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.32.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.32.2.2 skrll * 3. The name of the author may not be used to endorse or promote products 16 1.32.2.2 skrll * derived from this software without specific prior written permission. 17 1.32.2.2 skrll * 18 1.32.2.2 skrll * Alternatively, this software may be distributed under the terms of the 19 1.32.2.2 skrll * GNU General Public License ("GPL") version 2 as published by the Free 20 1.32.2.2 skrll * Software Foundation. 21 1.32.2.2 skrll * 22 1.32.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 1.32.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 1.32.2.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 1.32.2.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 1.32.2.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 1.32.2.2 skrll * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 1.32.2.2 skrll * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 1.32.2.2 skrll * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 1.32.2.2 skrll * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 1.32.2.2 skrll * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 1.32.2.2 skrll */ 33 1.32.2.2 skrll 34 1.32.2.2 skrll #include <sys/cdefs.h> 35 1.32.2.2 skrll #ifdef __FreeBSD__ 36 1.32.2.2 skrll __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_node.c,v 1.22 2004/04/05 04:15:55 sam Exp $"); 37 1.32.2.2 skrll #else 38 1.32.2.6 skrll __KERNEL_RCSID(0, "$NetBSD: ieee80211_node.c,v 1.32.2.6 2004/10/19 15:58:11 skrll Exp $"); 39 1.32.2.2 skrll #endif 40 1.32.2.2 skrll 41 1.32.2.2 skrll #include "opt_inet.h" 42 1.32.2.2 skrll 43 1.32.2.2 skrll #include <sys/param.h> 44 1.32.2.2 skrll #include <sys/systm.h> 45 1.32.2.2 skrll #include <sys/mbuf.h> 46 1.32.2.2 skrll #include <sys/malloc.h> 47 1.32.2.2 skrll #include <sys/kernel.h> 48 1.32.2.2 skrll #include <sys/socket.h> 49 1.32.2.2 skrll #include <sys/sockio.h> 50 1.32.2.2 skrll #include <sys/endian.h> 51 1.32.2.2 skrll #include <sys/errno.h> 52 1.32.2.2 skrll #ifdef __FreeBSD__ 53 1.32.2.2 skrll #include <sys/bus.h> 54 1.32.2.2 skrll #endif 55 1.32.2.2 skrll #include <sys/proc.h> 56 1.32.2.2 skrll #include <sys/sysctl.h> 57 1.32.2.2 skrll 58 1.32.2.2 skrll #ifdef __FreeBSD__ 59 1.32.2.2 skrll #include <machine/atomic.h> 60 1.32.2.2 skrll #endif 61 1.32.2.2 skrll 62 1.32.2.2 skrll #include <net/if.h> 63 1.32.2.2 skrll #include <net/if_dl.h> 64 1.32.2.2 skrll #include <net/if_media.h> 65 1.32.2.2 skrll #include <net/if_arp.h> 66 1.32.2.2 skrll #ifdef __FreeBSD__ 67 1.32.2.2 skrll #include <net/ethernet.h> 68 1.32.2.2 skrll #else 69 1.32.2.2 skrll #include <net/if_ether.h> 70 1.32.2.2 skrll #endif 71 1.32.2.2 skrll #include <net/if_llc.h> 72 1.32.2.2 skrll 73 1.32.2.2 skrll #include <net80211/ieee80211_var.h> 74 1.32.2.2 skrll #include <net80211/ieee80211_compat.h> 75 1.32.2.2 skrll 76 1.32.2.2 skrll #include <net/bpf.h> 77 1.32.2.2 skrll 78 1.32.2.2 skrll #ifdef INET 79 1.32.2.2 skrll #include <netinet/in.h> 80 1.32.2.2 skrll #ifdef __FreeBSD__ 81 1.32.2.2 skrll #include <netinet/if_ether.h> 82 1.32.2.2 skrll #else 83 1.32.2.2 skrll #include <net/if_ether.h> 84 1.32.2.2 skrll #endif 85 1.32.2.2 skrll #endif 86 1.32.2.2 skrll 87 1.32.2.2 skrll static struct ieee80211_node *ieee80211_node_alloc(struct ieee80211com *); 88 1.32.2.2 skrll static void ieee80211_node_free(struct ieee80211com *, struct ieee80211_node *); 89 1.32.2.2 skrll static void ieee80211_node_copy(struct ieee80211com *, 90 1.32.2.2 skrll struct ieee80211_node *, const struct ieee80211_node *); 91 1.32.2.2 skrll static u_int8_t ieee80211_node_getrssi(struct ieee80211com *, 92 1.32.2.2 skrll struct ieee80211_node *); 93 1.32.2.2 skrll 94 1.32.2.2 skrll static void ieee80211_setup_node(struct ieee80211com *ic, 95 1.32.2.2 skrll struct ieee80211_node *ni, u_int8_t *macaddr); 96 1.32.2.3 skrll static void ieee80211_free_node(struct ieee80211com *, 97 1.32.2.2 skrll struct ieee80211_node *); 98 1.32.2.2 skrll 99 1.32.2.2 skrll MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); 100 1.32.2.2 skrll 101 1.32.2.2 skrll void 102 1.32.2.2 skrll ieee80211_node_attach(struct ieee80211com *ic) 103 1.32.2.2 skrll { 104 1.32.2.2 skrll 105 1.32.2.2 skrll /* XXX need unit */ 106 1.32.2.2 skrll IEEE80211_NODE_LOCK_INIT(ic, ic->ic_ifp->if_xname); 107 1.32.2.2 skrll TAILQ_INIT(&ic->ic_node); 108 1.32.2.2 skrll ic->ic_node_alloc = ieee80211_node_alloc; 109 1.32.2.2 skrll ic->ic_node_free = ieee80211_node_free; 110 1.32.2.2 skrll ic->ic_node_copy = ieee80211_node_copy; 111 1.32.2.2 skrll ic->ic_node_getrssi = ieee80211_node_getrssi; 112 1.32.2.2 skrll ic->ic_scangen = 1; 113 1.32.2.3 skrll ic->ic_max_nnodes = ieee80211_cache_size; 114 1.32.2.2 skrll 115 1.32.2.2 skrll if (ic->ic_max_aid == 0) 116 1.32.2.2 skrll ic->ic_max_aid = IEEE80211_AID_DEF; 117 1.32.2.2 skrll else if (ic->ic_max_aid > IEEE80211_AID_MAX) 118 1.32.2.2 skrll ic->ic_max_aid = IEEE80211_AID_MAX; 119 1.32.2.2 skrll MALLOC(ic->ic_aid_bitmap, u_int32_t *, 120 1.32.2.2 skrll howmany(ic->ic_max_aid, 32) * sizeof(u_int32_t), 121 1.32.2.2 skrll M_DEVBUF, M_NOWAIT | M_ZERO); 122 1.32.2.2 skrll if (ic->ic_aid_bitmap == NULL) { 123 1.32.2.2 skrll /* XXX no way to recover */ 124 1.32.2.2 skrll printf("%s: no memory for AID bitmap!\n", __func__); 125 1.32.2.2 skrll ic->ic_max_aid = 0; 126 1.32.2.2 skrll } 127 1.32.2.2 skrll } 128 1.32.2.2 skrll 129 1.32.2.3 skrll static struct ieee80211_node * 130 1.32.2.3 skrll ieee80211_alloc_node_helper(struct ieee80211com *ic) 131 1.32.2.3 skrll { 132 1.32.2.3 skrll struct ieee80211_node *ni; 133 1.32.2.3 skrll if (ic->ic_nnodes >= ic->ic_max_nnodes) 134 1.32.2.3 skrll ieee80211_clean_nodes(ic); 135 1.32.2.3 skrll if (ic->ic_nnodes >= ic->ic_max_nnodes) 136 1.32.2.3 skrll return NULL; 137 1.32.2.3 skrll ni = (*ic->ic_node_alloc)(ic); 138 1.32.2.3 skrll if (ni != NULL) 139 1.32.2.3 skrll ic->ic_nnodes++; 140 1.32.2.3 skrll return ni; 141 1.32.2.3 skrll } 142 1.32.2.3 skrll 143 1.32.2.2 skrll void 144 1.32.2.2 skrll ieee80211_node_lateattach(struct ieee80211com *ic) 145 1.32.2.2 skrll { 146 1.32.2.2 skrll struct ieee80211_node *ni; 147 1.32.2.2 skrll 148 1.32.2.3 skrll ni = ieee80211_alloc_node_helper(ic); 149 1.32.2.2 skrll IASSERT(ni != NULL, ("unable to setup inital BSS node")); 150 1.32.2.2 skrll ni->ni_chan = IEEE80211_CHAN_ANYC; 151 1.32.2.3 skrll ic->ic_bss = ieee80211_ref_node(ni); 152 1.32.2.2 skrll ic->ic_txpower = IEEE80211_TXPOWER_MAX; 153 1.32.2.2 skrll } 154 1.32.2.2 skrll 155 1.32.2.2 skrll void 156 1.32.2.2 skrll ieee80211_node_detach(struct ieee80211com *ic) 157 1.32.2.2 skrll { 158 1.32.2.2 skrll 159 1.32.2.2 skrll if (ic->ic_bss != NULL) { 160 1.32.2.2 skrll (*ic->ic_node_free)(ic, ic->ic_bss); 161 1.32.2.2 skrll ic->ic_bss = NULL; 162 1.32.2.2 skrll } 163 1.32.2.2 skrll ieee80211_free_allnodes(ic); 164 1.32.2.2 skrll IEEE80211_NODE_LOCK_DESTROY(ic); 165 1.32.2.2 skrll if (ic->ic_aid_bitmap != NULL) 166 1.32.2.2 skrll FREE(ic->ic_aid_bitmap, M_DEVBUF); 167 1.32.2.2 skrll } 168 1.32.2.2 skrll 169 1.32.2.2 skrll /* 170 1.32.2.2 skrll * AP scanning support. 171 1.32.2.2 skrll */ 172 1.32.2.2 skrll 173 1.32.2.2 skrll /* 174 1.32.2.2 skrll * Initialize the active channel set based on the set 175 1.32.2.2 skrll * of available channels and the current PHY mode. 176 1.32.2.2 skrll */ 177 1.32.2.2 skrll static void 178 1.32.2.2 skrll ieee80211_reset_scan(struct ieee80211com *ic) 179 1.32.2.2 skrll { 180 1.32.2.2 skrll 181 1.32.2.2 skrll memcpy(ic->ic_chan_scan, ic->ic_chan_active, 182 1.32.2.2 skrll sizeof(ic->ic_chan_active)); 183 1.32.2.2 skrll /* NB: hack, setup so next_scan starts with the first channel */ 184 1.32.2.2 skrll if (ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC) 185 1.32.2.2 skrll ic->ic_bss->ni_chan = &ic->ic_channels[IEEE80211_CHAN_MAX]; 186 1.32.2.2 skrll } 187 1.32.2.2 skrll 188 1.32.2.2 skrll /* 189 1.32.2.2 skrll * Begin an active scan. 190 1.32.2.2 skrll */ 191 1.32.2.2 skrll void 192 1.32.2.2 skrll ieee80211_begin_scan(struct ieee80211com *ic) 193 1.32.2.2 skrll { 194 1.32.2.2 skrll 195 1.32.2.2 skrll /* 196 1.32.2.2 skrll * In all but hostap mode scanning starts off in 197 1.32.2.2 skrll * an active mode before switching to passive. 198 1.32.2.2 skrll */ 199 1.32.2.2 skrll if (ic->ic_opmode != IEEE80211_M_HOSTAP) { 200 1.32.2.2 skrll ic->ic_flags |= IEEE80211_F_ASCAN; 201 1.32.2.2 skrll ic->ic_stats.is_scan_active++; 202 1.32.2.2 skrll } else 203 1.32.2.2 skrll ic->ic_stats.is_scan_passive++; 204 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, ("begin %s scan\n", 205 1.32.2.2 skrll (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive")); 206 1.32.2.2 skrll /* 207 1.32.2.2 skrll * Clear scan state and flush any previously seen 208 1.32.2.2 skrll * AP's. Note that the latter assumes we don't act 209 1.32.2.2 skrll * as both an AP and a station, otherwise we'll 210 1.32.2.2 skrll * potentially flush state of stations associated 211 1.32.2.2 skrll * with us. 212 1.32.2.2 skrll */ 213 1.32.2.2 skrll ieee80211_reset_scan(ic); 214 1.32.2.2 skrll ieee80211_free_allnodes(ic); 215 1.32.2.2 skrll 216 1.32.2.2 skrll /* Scan the next channel. */ 217 1.32.2.2 skrll ieee80211_next_scan(ic); 218 1.32.2.2 skrll } 219 1.32.2.2 skrll 220 1.32.2.2 skrll /* 221 1.32.2.2 skrll * Switch to the next channel marked for scanning. 222 1.32.2.2 skrll */ 223 1.32.2.2 skrll void 224 1.32.2.2 skrll ieee80211_next_scan(struct ieee80211com *ic) 225 1.32.2.2 skrll { 226 1.32.2.2 skrll struct ieee80211_channel *chan; 227 1.32.2.2 skrll 228 1.32.2.2 skrll chan = ic->ic_bss->ni_chan; 229 1.32.2.2 skrll for (;;) { 230 1.32.2.2 skrll if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX]) 231 1.32.2.2 skrll chan = &ic->ic_channels[0]; 232 1.32.2.2 skrll if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) { 233 1.32.2.2 skrll /* 234 1.32.2.2 skrll * Honor channels marked passive-only 235 1.32.2.2 skrll * during an active scan. 236 1.32.2.2 skrll */ 237 1.32.2.2 skrll if ((ic->ic_flags & IEEE80211_F_ASCAN) == 0 || 238 1.32.2.2 skrll (chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0) 239 1.32.2.2 skrll break; 240 1.32.2.2 skrll } 241 1.32.2.2 skrll if (chan == ic->ic_bss->ni_chan) { 242 1.32.2.2 skrll ieee80211_end_scan(ic); 243 1.32.2.2 skrll return; 244 1.32.2.2 skrll } 245 1.32.2.2 skrll } 246 1.32.2.2 skrll clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan)); 247 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 248 1.32.2.2 skrll ("%s: chan %d->%d\n", __func__, 249 1.32.2.2 skrll ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 250 1.32.2.2 skrll ieee80211_chan2ieee(ic, chan))); 251 1.32.2.2 skrll ic->ic_bss->ni_chan = chan; 252 1.32.2.2 skrll ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 253 1.32.2.2 skrll } 254 1.32.2.2 skrll 255 1.32.2.2 skrll void 256 1.32.2.2 skrll ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan) 257 1.32.2.2 skrll { 258 1.32.2.2 skrll struct ieee80211_node *ni; 259 1.32.2.2 skrll 260 1.32.2.2 skrll ni = ic->ic_bss; 261 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, ("creating ibss\n")); 262 1.32.2.2 skrll ic->ic_flags |= IEEE80211_F_SIBSS; 263 1.32.2.2 skrll ni->ni_chan = chan; 264 1.32.2.2 skrll ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)]; 265 1.32.2.2 skrll IEEE80211_ADDR_COPY(ni->ni_macaddr, ic->ic_myaddr); 266 1.32.2.2 skrll IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr); 267 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_IBSS) { 268 1.32.2.2 skrll if ((ic->ic_flags & IEEE80211_F_DESBSSID) != 0) 269 1.32.2.2 skrll IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_des_bssid); 270 1.32.2.2 skrll else 271 1.32.2.2 skrll ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */ 272 1.32.2.2 skrll } 273 1.32.2.2 skrll ni->ni_esslen = ic->ic_des_esslen; 274 1.32.2.2 skrll memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen); 275 1.32.2.2 skrll ni->ni_rssi = 0; 276 1.32.2.2 skrll ni->ni_rstamp = 0; 277 1.32.2.2 skrll memset(ni->ni_tstamp, 0, sizeof(ni->ni_tstamp)); 278 1.32.2.2 skrll ni->ni_intval = ic->ic_lintval; 279 1.32.2.2 skrll ni->ni_capinfo = IEEE80211_CAPINFO_IBSS; 280 1.32.2.2 skrll if (ic->ic_flags & IEEE80211_F_PRIVACY) 281 1.32.2.2 skrll ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; 282 1.32.2.2 skrll if (ic->ic_phytype == IEEE80211_T_FH) { 283 1.32.2.2 skrll ni->ni_fhdwell = 200; /* XXX */ 284 1.32.2.2 skrll ni->ni_fhindex = 1; 285 1.32.2.2 skrll } 286 1.32.2.2 skrll ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 287 1.32.2.2 skrll } 288 1.32.2.2 skrll 289 1.32.2.2 skrll int 290 1.32.2.2 skrll ieee80211_match_bss(struct ieee80211com *ic, struct ieee80211_node *ni) 291 1.32.2.2 skrll { 292 1.32.2.2 skrll u_int8_t rate; 293 1.32.2.2 skrll int fail; 294 1.32.2.2 skrll 295 1.32.2.2 skrll fail = 0; 296 1.32.2.2 skrll if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) 297 1.32.2.2 skrll fail |= 0x01; 298 1.32.2.2 skrll if (ic->ic_des_chan != IEEE80211_CHAN_ANYC && 299 1.32.2.2 skrll ni->ni_chan != ic->ic_des_chan) 300 1.32.2.2 skrll fail |= 0x01; 301 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_IBSS) { 302 1.32.2.2 skrll if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) 303 1.32.2.2 skrll fail |= 0x02; 304 1.32.2.2 skrll } else { 305 1.32.2.2 skrll if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) 306 1.32.2.2 skrll fail |= 0x02; 307 1.32.2.2 skrll } 308 1.32.2.2 skrll if (ic->ic_flags & IEEE80211_F_PRIVACY) { 309 1.32.2.2 skrll if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) 310 1.32.2.2 skrll fail |= 0x04; 311 1.32.2.2 skrll } else { 312 1.32.2.2 skrll /* XXX does this mean privacy is supported or required? */ 313 1.32.2.2 skrll if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) 314 1.32.2.2 skrll fail |= 0x04; 315 1.32.2.2 skrll } 316 1.32.2.2 skrll rate = ieee80211_fix_rate(ic, ni, IEEE80211_F_DONEGO); 317 1.32.2.2 skrll if (rate & IEEE80211_RATE_BASIC) 318 1.32.2.2 skrll fail |= 0x08; 319 1.32.2.2 skrll if (ic->ic_des_esslen != 0 && 320 1.32.2.2 skrll (ni->ni_esslen != ic->ic_des_esslen || 321 1.32.2.2 skrll memcmp(ni->ni_essid, ic->ic_des_essid, ic->ic_des_esslen) != 0)) 322 1.32.2.2 skrll fail |= 0x10; 323 1.32.2.2 skrll if ((ic->ic_flags & IEEE80211_F_DESBSSID) && 324 1.32.2.2 skrll !IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid)) 325 1.32.2.2 skrll fail |= 0x20; 326 1.32.2.2 skrll #ifdef IEEE80211_DEBUG 327 1.32.2.2 skrll if (ic->ic_if.if_flags & IFF_DEBUG) { 328 1.32.2.2 skrll printf(" %c %s", fail ? '-' : '+', 329 1.32.2.2 skrll ether_sprintf(ni->ni_macaddr)); 330 1.32.2.2 skrll printf(" %s%c", ether_sprintf(ni->ni_bssid), 331 1.32.2.2 skrll fail & 0x20 ? '!' : ' '); 332 1.32.2.2 skrll printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), 333 1.32.2.2 skrll fail & 0x01 ? '!' : ' '); 334 1.32.2.2 skrll printf(" %+4d", ni->ni_rssi); 335 1.32.2.2 skrll printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, 336 1.32.2.2 skrll fail & 0x08 ? '!' : ' '); 337 1.32.2.2 skrll printf(" %4s%c", 338 1.32.2.2 skrll (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : 339 1.32.2.2 skrll (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : 340 1.32.2.2 skrll "????", 341 1.32.2.2 skrll fail & 0x02 ? '!' : ' '); 342 1.32.2.2 skrll printf(" %3s%c ", 343 1.32.2.2 skrll (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? 344 1.32.2.2 skrll "wep" : "no", 345 1.32.2.2 skrll fail & 0x04 ? '!' : ' '); 346 1.32.2.2 skrll ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); 347 1.32.2.2 skrll printf("%s\n", fail & 0x10 ? "!" : ""); 348 1.32.2.2 skrll } 349 1.32.2.2 skrll #endif 350 1.32.2.2 skrll return fail; 351 1.32.2.2 skrll } 352 1.32.2.2 skrll 353 1.32.2.2 skrll /* 354 1.32.2.2 skrll * Complete a scan of potential channels. 355 1.32.2.2 skrll */ 356 1.32.2.2 skrll void 357 1.32.2.2 skrll ieee80211_end_scan(struct ieee80211com *ic) 358 1.32.2.2 skrll { 359 1.32.2.2 skrll struct ieee80211_node *ni, *nextbs, *selbs; 360 1.32.2.2 skrll int i, fail; 361 1.32.2.2 skrll 362 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, ("end %s scan\n", 363 1.32.2.2 skrll (ic->ic_flags & IEEE80211_F_ASCAN) ? "active" : "passive")); 364 1.32.2.2 skrll 365 1.32.2.2 skrll ic->ic_flags &= ~IEEE80211_F_ASCAN; 366 1.32.2.2 skrll ni = TAILQ_FIRST(&ic->ic_node); 367 1.32.2.2 skrll 368 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 369 1.32.2.2 skrll /* XXX off stack? */ 370 1.32.2.2 skrll u_char occupied[roundup(IEEE80211_CHAN_MAX, NBBY)]; 371 1.32.2.2 skrll /* 372 1.32.2.2 skrll * The passive scan to look for existing AP's completed, 373 1.32.2.2 skrll * select a channel to camp on. Identify the channels 374 1.32.2.2 skrll * that already have one or more AP's and try to locate 375 1.32.2.2 skrll * an unnoccupied one. If that fails, pick a random 376 1.32.2.2 skrll * channel from the active set. 377 1.32.2.2 skrll */ 378 1.32.2.2 skrll for (; ni != NULL; ni = nextbs) { 379 1.32.2.2 skrll nextbs = TAILQ_NEXT(ni, ni_list); 380 1.32.2.2 skrll setbit(occupied, ieee80211_chan2ieee(ic, ni->ni_chan)); 381 1.32.2.2 skrll } 382 1.32.2.2 skrll for (i = 0; i < IEEE80211_CHAN_MAX; i++) 383 1.32.2.2 skrll if (isset(ic->ic_chan_active, i) && isclr(occupied, i)) 384 1.32.2.2 skrll break; 385 1.32.2.2 skrll if (i == IEEE80211_CHAN_MAX) { 386 1.32.2.2 skrll fail = arc4random() & 3; /* random 0-3 */ 387 1.32.2.2 skrll for (i = 0; i < IEEE80211_CHAN_MAX; i++) 388 1.32.2.2 skrll if (isset(ic->ic_chan_active, i) && fail-- == 0) 389 1.32.2.2 skrll break; 390 1.32.2.2 skrll } 391 1.32.2.2 skrll ieee80211_create_ibss(ic, &ic->ic_channels[i]); 392 1.32.2.2 skrll return; 393 1.32.2.2 skrll } 394 1.32.2.2 skrll if (ni == NULL) { 395 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 396 1.32.2.2 skrll ("%s: no scan candidate\n", __func__)); 397 1.32.2.2 skrll notfound: 398 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_IBSS && 399 1.32.2.2 skrll (ic->ic_flags & IEEE80211_F_IBSSON) && 400 1.32.2.2 skrll ic->ic_des_esslen != 0) { 401 1.32.2.2 skrll ieee80211_create_ibss(ic, ic->ic_ibss_chan); 402 1.32.2.2 skrll return; 403 1.32.2.2 skrll } 404 1.32.2.2 skrll /* 405 1.32.2.2 skrll * Reset the list of channels to scan and start again. 406 1.32.2.2 skrll */ 407 1.32.2.2 skrll ieee80211_reset_scan(ic); 408 1.32.2.2 skrll ieee80211_next_scan(ic); 409 1.32.2.2 skrll return; 410 1.32.2.2 skrll } 411 1.32.2.2 skrll selbs = NULL; 412 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_SCAN, 413 1.32.2.2 skrll ("\tmacaddr bssid chan rssi rate flag wep essid\n")); 414 1.32.2.2 skrll for (; ni != NULL; ni = nextbs) { 415 1.32.2.2 skrll nextbs = TAILQ_NEXT(ni, ni_list); 416 1.32.2.2 skrll if (ni->ni_fails) { 417 1.32.2.2 skrll /* 418 1.32.2.2 skrll * The configuration of the access points may change 419 1.32.2.2 skrll * during my scan. So delete the entry for the AP 420 1.32.2.2 skrll * and retry to associate if there is another beacon. 421 1.32.2.2 skrll */ 422 1.32.2.2 skrll if (ni->ni_fails++ > 2) 423 1.32.2.2 skrll ieee80211_free_node(ic, ni); 424 1.32.2.2 skrll continue; 425 1.32.2.2 skrll } 426 1.32.2.2 skrll if (ieee80211_match_bss(ic, ni) == 0) { 427 1.32.2.2 skrll if (selbs == NULL) 428 1.32.2.2 skrll selbs = ni; 429 1.32.2.3 skrll else if (ni->ni_rssi > selbs->ni_rssi) 430 1.32.2.2 skrll selbs = ni; 431 1.32.2.2 skrll } 432 1.32.2.2 skrll } 433 1.32.2.2 skrll if (selbs == NULL) 434 1.32.2.2 skrll goto notfound; 435 1.32.2.3 skrll ieee80211_node_newstate(selbs, IEEE80211_STA_BSS); 436 1.32.2.2 skrll (*ic->ic_node_copy)(ic, ic->ic_bss, selbs); 437 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_IBSS) { 438 1.32.2.2 skrll ieee80211_fix_rate(ic, ic->ic_bss, IEEE80211_F_DOFRATE | 439 1.32.2.2 skrll IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 440 1.32.2.3 skrll if (ic->ic_bss->ni_rates.rs_nrates == 0) 441 1.32.2.2 skrll goto notfound; 442 1.32.2.2 skrll ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 443 1.32.2.2 skrll } else { 444 1.32.2.2 skrll ieee80211_new_state(ic, IEEE80211_S_AUTH, -1); 445 1.32.2.2 skrll } 446 1.32.2.2 skrll } 447 1.32.2.2 skrll 448 1.32.2.2 skrll int 449 1.32.2.2 skrll ieee80211_get_rate(struct ieee80211com *ic) 450 1.32.2.2 skrll { 451 1.32.2.2 skrll u_int8_t (*rates)[IEEE80211_RATE_MAXSIZE]; 452 1.32.2.2 skrll int rate; 453 1.32.2.2 skrll 454 1.32.2.2 skrll rates = &ic->ic_bss->ni_rates.rs_rates; 455 1.32.2.2 skrll 456 1.32.2.2 skrll if (ic->ic_fixed_rate != -1) 457 1.32.2.2 skrll rate = (*rates)[ic->ic_fixed_rate]; 458 1.32.2.2 skrll else if (ic->ic_state == IEEE80211_S_RUN) 459 1.32.2.2 skrll rate = (*rates)[ic->ic_bss->ni_txrate]; 460 1.32.2.2 skrll else 461 1.32.2.2 skrll rate = 0; 462 1.32.2.2 skrll 463 1.32.2.2 skrll return rate & IEEE80211_RATE_VAL; 464 1.32.2.2 skrll } 465 1.32.2.2 skrll 466 1.32.2.2 skrll static struct ieee80211_node * 467 1.32.2.2 skrll ieee80211_node_alloc(struct ieee80211com *ic) 468 1.32.2.2 skrll { 469 1.32.2.2 skrll struct ieee80211_node *ni; 470 1.32.2.2 skrll MALLOC(ni, struct ieee80211_node *, sizeof(struct ieee80211_node), 471 1.32.2.2 skrll M_80211_NODE, M_NOWAIT | M_ZERO); 472 1.32.2.2 skrll return ni; 473 1.32.2.2 skrll } 474 1.32.2.2 skrll 475 1.32.2.2 skrll static void 476 1.32.2.2 skrll node_cleanup(struct ieee80211com *ic, struct ieee80211_node *ni) 477 1.32.2.2 skrll { 478 1.32.2.2 skrll if (ni->ni_challenge != NULL) { 479 1.32.2.2 skrll FREE(ni->ni_challenge, M_DEVBUF); 480 1.32.2.2 skrll ni->ni_challenge = NULL; 481 1.32.2.2 skrll } 482 1.32.2.2 skrll } 483 1.32.2.2 skrll 484 1.32.2.2 skrll static void 485 1.32.2.2 skrll ieee80211_node_free(struct ieee80211com *ic, struct ieee80211_node *ni) 486 1.32.2.2 skrll { 487 1.32.2.2 skrll node_cleanup(ic, ni); 488 1.32.2.2 skrll FREE(ni, M_80211_NODE); 489 1.32.2.2 skrll } 490 1.32.2.2 skrll 491 1.32.2.2 skrll static void 492 1.32.2.2 skrll ieee80211_node_copy(struct ieee80211com *ic, 493 1.32.2.2 skrll struct ieee80211_node *dst, const struct ieee80211_node *src) 494 1.32.2.2 skrll { 495 1.32.2.2 skrll node_cleanup(ic, dst); 496 1.32.2.2 skrll *dst = *src; 497 1.32.2.2 skrll dst->ni_challenge = NULL; 498 1.32.2.2 skrll } 499 1.32.2.2 skrll 500 1.32.2.2 skrll static u_int8_t 501 1.32.2.2 skrll ieee80211_node_getrssi(struct ieee80211com *ic, struct ieee80211_node *ni) 502 1.32.2.2 skrll { 503 1.32.2.2 skrll return ni->ni_rssi; 504 1.32.2.2 skrll } 505 1.32.2.2 skrll 506 1.32.2.2 skrll static void 507 1.32.2.2 skrll ieee80211_setup_node(struct ieee80211com *ic, 508 1.32.2.2 skrll struct ieee80211_node *ni, u_int8_t *macaddr) 509 1.32.2.2 skrll { 510 1.32.2.2 skrll int hash; 511 1.32.2.2 skrll 512 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 513 1.32.2.2 skrll ("%s %s\n", __func__, ether_sprintf(macaddr))); 514 1.32.2.2 skrll IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); 515 1.32.2.2 skrll hash = IEEE80211_NODE_HASH(macaddr); 516 1.32.2.3 skrll ieee80211_node_newstate(ni, IEEE80211_STA_CACHE); 517 1.32.2.2 skrll 518 1.32.2.2 skrll IEEE80211_NODE_LOCK_BH(ic); 519 1.32.2.2 skrll /* 520 1.32.2.2 skrll * Note we don't enable the inactive timer when acting 521 1.32.2.2 skrll * as a station. Nodes created in this mode represent 522 1.32.2.2 skrll * AP's identified while scanning. If we time them out 523 1.32.2.2 skrll * then several things happen: we can't return the data 524 1.32.2.2 skrll * to users to show the list of AP's we encountered, and 525 1.32.2.2 skrll * more importantly, we'll incorrectly deauthenticate 526 1.32.2.2 skrll * ourself because the inactivity timer will kick us off. 527 1.32.2.2 skrll */ 528 1.32.2.2 skrll if (ic->ic_opmode != IEEE80211_M_STA && 529 1.32.2.2 skrll TAILQ_EMPTY(&ic->ic_node)) 530 1.32.2.2 skrll ic->ic_inact_timer = IEEE80211_INACT_WAIT; 531 1.32.2.2 skrll TAILQ_INSERT_TAIL(&ic->ic_node, ni, ni_list); 532 1.32.2.2 skrll LIST_INSERT_HEAD(&ic->ic_hash[hash], ni, ni_hash); 533 1.32.2.2 skrll IEEE80211_NODE_UNLOCK_BH(ic); 534 1.32.2.2 skrll } 535 1.32.2.2 skrll 536 1.32.2.2 skrll struct ieee80211_node * 537 1.32.2.2 skrll ieee80211_alloc_node(struct ieee80211com *ic, u_int8_t *macaddr) 538 1.32.2.2 skrll { 539 1.32.2.3 skrll struct ieee80211_node *ni = ieee80211_alloc_node_helper(ic); 540 1.32.2.3 skrll if (ni != NULL) { 541 1.32.2.2 skrll ieee80211_setup_node(ic, ni, macaddr); 542 1.32.2.3 skrll } else 543 1.32.2.2 skrll ic->ic_stats.is_rx_nodealloc++; 544 1.32.2.2 skrll return ni; 545 1.32.2.2 skrll } 546 1.32.2.2 skrll 547 1.32.2.2 skrll struct ieee80211_node * 548 1.32.2.2 skrll ieee80211_dup_bss(struct ieee80211com *ic, u_int8_t *macaddr) 549 1.32.2.2 skrll { 550 1.32.2.3 skrll struct ieee80211_node *ni = ieee80211_alloc_node_helper(ic); 551 1.32.2.2 skrll if (ni != NULL) { 552 1.32.2.2 skrll ieee80211_setup_node(ic, ni, macaddr); 553 1.32.2.2 skrll /* 554 1.32.2.2 skrll * Inherit from ic_bss. 555 1.32.2.2 skrll */ 556 1.32.2.2 skrll IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 557 1.32.2.2 skrll ni->ni_chan = ic->ic_bss->ni_chan; 558 1.32.2.2 skrll } else 559 1.32.2.2 skrll ic->ic_stats.is_rx_nodealloc++; 560 1.32.2.2 skrll return ni; 561 1.32.2.2 skrll } 562 1.32.2.2 skrll 563 1.32.2.2 skrll static struct ieee80211_node * 564 1.32.2.2 skrll _ieee80211_find_node(struct ieee80211com *ic, u_int8_t *macaddr) 565 1.32.2.2 skrll { 566 1.32.2.2 skrll struct ieee80211_node *ni; 567 1.32.2.2 skrll int hash; 568 1.32.2.2 skrll 569 1.32.2.2 skrll IEEE80211_NODE_LOCK_ASSERT(ic); 570 1.32.2.2 skrll 571 1.32.2.2 skrll hash = IEEE80211_NODE_HASH(macaddr); 572 1.32.2.2 skrll LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) { 573 1.32.2.2 skrll if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { 574 1.32.2.3 skrll /* least-recently used is at tail */ 575 1.32.2.3 skrll TAILQ_REMOVE(&ic->ic_node, ni, ni_list); 576 1.32.2.3 skrll TAILQ_INSERT_TAIL(&ic->ic_node, ni, ni_list); 577 1.32.2.2 skrll return ni; 578 1.32.2.2 skrll } 579 1.32.2.2 skrll } 580 1.32.2.2 skrll return NULL; 581 1.32.2.2 skrll } 582 1.32.2.2 skrll 583 1.32.2.2 skrll struct ieee80211_node * 584 1.32.2.2 skrll ieee80211_find_node(struct ieee80211com *ic, u_int8_t *macaddr) 585 1.32.2.2 skrll { 586 1.32.2.2 skrll struct ieee80211_node *ni; 587 1.32.2.2 skrll 588 1.32.2.2 skrll IEEE80211_NODE_LOCK(ic); 589 1.32.2.2 skrll ni = _ieee80211_find_node(ic, macaddr); 590 1.32.2.2 skrll IEEE80211_NODE_UNLOCK(ic); 591 1.32.2.2 skrll return ni; 592 1.32.2.2 skrll } 593 1.32.2.2 skrll 594 1.32.2.2 skrll /* 595 1.32.2.2 skrll * Return a reference to the appropriate node for sending 596 1.32.2.2 skrll * a data frame. This handles node discovery in adhoc networks. 597 1.32.2.3 skrll * 598 1.32.2.3 skrll * Drivers will call this, so increase the reference count before 599 1.32.2.3 skrll * returning the node. 600 1.32.2.2 skrll */ 601 1.32.2.2 skrll struct ieee80211_node * 602 1.32.2.2 skrll ieee80211_find_txnode(struct ieee80211com *ic, u_int8_t *macaddr) 603 1.32.2.2 skrll { 604 1.32.2.2 skrll struct ieee80211_node *ni; 605 1.32.2.2 skrll 606 1.32.2.2 skrll /* 607 1.32.2.2 skrll * The destination address should be in the node table 608 1.32.2.2 skrll * unless we are operating in station mode or this is a 609 1.32.2.2 skrll * multicast/broadcast frame. 610 1.32.2.2 skrll */ 611 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_STA || IEEE80211_IS_MULTICAST(macaddr)) 612 1.32.2.3 skrll return ieee80211_ref_node(ic->ic_bss); 613 1.32.2.2 skrll 614 1.32.2.2 skrll /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ 615 1.32.2.2 skrll IEEE80211_NODE_LOCK(ic); 616 1.32.2.2 skrll ni = _ieee80211_find_node(ic, macaddr); 617 1.32.2.2 skrll IEEE80211_NODE_UNLOCK(ic); 618 1.32.2.6 skrll if (ni == NULL) { 619 1.32.2.6 skrll if (ic->ic_opmode != IEEE80211_M_IBSS && 620 1.32.2.6 skrll ic->ic_opmode != IEEE80211_M_AHDEMO) 621 1.32.2.6 skrll return NULL; 622 1.32.2.2 skrll /* 623 1.32.2.2 skrll * Fake up a node; this handles node discovery in 624 1.32.2.2 skrll * adhoc mode. Note that for the driver's benefit 625 1.32.2.2 skrll * we we treat this like an association so the driver 626 1.32.2.2 skrll * has an opportunity to setup it's private state. 627 1.32.2.2 skrll * 628 1.32.2.2 skrll * XXX need better way to handle this; issue probe 629 1.32.2.2 skrll * request so we can deduce rate set, etc. 630 1.32.2.2 skrll */ 631 1.32.2.6 skrll if ((ni = ieee80211_dup_bss(ic, macaddr)) == NULL) 632 1.32.2.6 skrll return NULL; 633 1.32.2.6 skrll /* XXX no rate negotiation; just dup */ 634 1.32.2.6 skrll ni->ni_rates = ic->ic_bss->ni_rates; 635 1.32.2.6 skrll if (ic->ic_newassoc) 636 1.32.2.6 skrll (*ic->ic_newassoc)(ic, ni, 1); 637 1.32.2.2 skrll } 638 1.32.2.3 skrll return ieee80211_ref_node(ni); 639 1.32.2.2 skrll } 640 1.32.2.2 skrll 641 1.32.2.2 skrll /* 642 1.32.2.2 skrll * It is usually desirable to process a Rx packet using its sender's 643 1.32.2.2 skrll * node-record instead of the BSS record. 644 1.32.2.2 skrll * 645 1.32.2.2 skrll * - AP mode: keep a node-record for every authenticated/associated 646 1.32.2.2 skrll * station *in the BSS*. For future use, we also track neighboring 647 1.32.2.2 skrll * APs, since they might belong to the same ESS. APs in the same 648 1.32.2.2 skrll * ESS may bridge packets to each other, forming a Wireless 649 1.32.2.2 skrll * Distribution System (WDS). 650 1.32.2.2 skrll * 651 1.32.2.2 skrll * - IBSS mode: keep a node-record for every station *in the BSS*. 652 1.32.2.2 skrll * Also track neighboring stations by their beacons/probe responses. 653 1.32.2.2 skrll * 654 1.32.2.2 skrll * - monitor mode: keep a node-record for every sender, regardless 655 1.32.2.2 skrll * of BSS. 656 1.32.2.2 skrll * 657 1.32.2.2 skrll * - STA mode: the only available node-record is the BSS record, 658 1.32.2.2 skrll * ic->ic_bss. 659 1.32.2.2 skrll * 660 1.32.2.2 skrll * Of all the 802.11 Control packets, only the node-records for 661 1.32.2.2 skrll * RTS packets node-record can be looked up. 662 1.32.2.2 skrll * 663 1.32.2.2 skrll * Return non-zero if the packet's node-record is kept, zero 664 1.32.2.2 skrll * otherwise. 665 1.32.2.2 skrll */ 666 1.32.2.2 skrll static __inline int 667 1.32.2.2 skrll ieee80211_needs_rxnode(struct ieee80211com *ic, struct ieee80211_frame *wh, 668 1.32.2.2 skrll u_int8_t **bssid) 669 1.32.2.2 skrll { 670 1.32.2.2 skrll struct ieee80211_node *bss = ic->ic_bss; 671 1.32.2.2 skrll int monitor, rc = 0; 672 1.32.2.2 skrll 673 1.32.2.2 skrll monitor = (ic->ic_opmode == IEEE80211_M_MONITOR); 674 1.32.2.2 skrll 675 1.32.2.2 skrll *bssid = NULL; 676 1.32.2.2 skrll 677 1.32.2.2 skrll switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { 678 1.32.2.2 skrll case IEEE80211_FC0_TYPE_CTL: 679 1.32.2.2 skrll if (!monitor) 680 1.32.2.2 skrll break; 681 1.32.2.2 skrll return (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 682 1.32.2.2 skrll IEEE80211_FC0_SUBTYPE_RTS; 683 1.32.2.2 skrll case IEEE80211_FC0_TYPE_MGT: 684 1.32.2.2 skrll *bssid = wh->i_addr3; 685 1.32.2.2 skrll switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) { 686 1.32.2.2 skrll case IEEE80211_FC0_SUBTYPE_BEACON: 687 1.32.2.2 skrll case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 688 1.32.2.2 skrll rc = 1; 689 1.32.2.2 skrll break; 690 1.32.2.2 skrll default: 691 1.32.2.3 skrll if (ic->ic_opmode == IEEE80211_M_STA) 692 1.32.2.3 skrll break; 693 1.32.2.3 skrll rc = IEEE80211_ADDR_EQ(*bssid, bss->ni_bssid) || 694 1.32.2.3 skrll IEEE80211_ADDR_EQ(*bssid, etherbroadcastaddr); 695 1.32.2.2 skrll break; 696 1.32.2.2 skrll } 697 1.32.2.2 skrll break; 698 1.32.2.2 skrll case IEEE80211_FC0_TYPE_DATA: 699 1.32.2.2 skrll switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { 700 1.32.2.2 skrll case IEEE80211_FC1_DIR_NODS: 701 1.32.2.2 skrll *bssid = wh->i_addr3; 702 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_IBSS || 703 1.32.2.2 skrll ic->ic_opmode == IEEE80211_M_AHDEMO) 704 1.32.2.2 skrll rc = IEEE80211_ADDR_EQ(*bssid, bss->ni_bssid); 705 1.32.2.2 skrll break; 706 1.32.2.2 skrll case IEEE80211_FC1_DIR_TODS: 707 1.32.2.2 skrll *bssid = wh->i_addr1; 708 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_HOSTAP) 709 1.32.2.2 skrll rc = IEEE80211_ADDR_EQ(*bssid, bss->ni_bssid); 710 1.32.2.2 skrll break; 711 1.32.2.2 skrll case IEEE80211_FC1_DIR_FROMDS: 712 1.32.2.2 skrll case IEEE80211_FC1_DIR_DSTODS: 713 1.32.2.2 skrll *bssid = wh->i_addr2; 714 1.32.2.2 skrll rc = (ic->ic_opmode == IEEE80211_M_HOSTAP); 715 1.32.2.2 skrll break; 716 1.32.2.2 skrll } 717 1.32.2.2 skrll break; 718 1.32.2.2 skrll } 719 1.32.2.2 skrll return monitor || rc; 720 1.32.2.2 skrll } 721 1.32.2.2 skrll 722 1.32.2.3 skrll /* Drivers call this, so increase the reference count before returning 723 1.32.2.3 skrll * the node. 724 1.32.2.3 skrll */ 725 1.32.2.2 skrll struct ieee80211_node * 726 1.32.2.2 skrll ieee80211_find_rxnode(struct ieee80211com *ic, struct ieee80211_frame *wh) 727 1.32.2.2 skrll { 728 1.32.2.2 skrll struct ieee80211_node *ni; 729 1.32.2.2 skrll const static u_int8_t zero[IEEE80211_ADDR_LEN]; 730 1.32.2.2 skrll u_int8_t *bssid; 731 1.32.2.2 skrll 732 1.32.2.2 skrll if (!ieee80211_needs_rxnode(ic, wh, &bssid)) 733 1.32.2.2 skrll return ieee80211_ref_node(ic->ic_bss); 734 1.32.2.2 skrll 735 1.32.2.2 skrll IEEE80211_NODE_LOCK(ic); 736 1.32.2.2 skrll ni = _ieee80211_find_node(ic, wh->i_addr2); 737 1.32.2.2 skrll IEEE80211_NODE_UNLOCK(ic); 738 1.32.2.2 skrll 739 1.32.2.2 skrll if (ni != NULL) 740 1.32.2.3 skrll return ieee80211_ref_node(ni); 741 1.32.2.2 skrll 742 1.32.2.2 skrll if (ic->ic_opmode == IEEE80211_M_HOSTAP) 743 1.32.2.2 skrll return ieee80211_ref_node(ic->ic_bss); 744 1.32.2.2 skrll 745 1.32.2.2 skrll /* XXX see remarks in ieee80211_find_txnode */ 746 1.32.2.2 skrll /* XXX no rate negotiation; just dup */ 747 1.32.2.2 skrll if ((ni = ieee80211_dup_bss(ic, wh->i_addr2)) == NULL) 748 1.32.2.2 skrll return ieee80211_ref_node(ic->ic_bss); 749 1.32.2.2 skrll 750 1.32.2.2 skrll IEEE80211_ADDR_COPY(ni->ni_bssid, (bssid != NULL) ? bssid : zero); 751 1.32.2.2 skrll 752 1.32.2.2 skrll ni->ni_rates = ic->ic_bss->ni_rates; 753 1.32.2.2 skrll if (ic->ic_newassoc) 754 1.32.2.2 skrll (*ic->ic_newassoc)(ic, ni, 1); 755 1.32.2.2 skrll 756 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 757 1.32.2.2 skrll ("%s: faked-up node %p for %s\n", __func__, ni, 758 1.32.2.2 skrll ether_sprintf(wh->i_addr2))); 759 1.32.2.2 skrll 760 1.32.2.2 skrll return ieee80211_ref_node(ni); 761 1.32.2.2 skrll } 762 1.32.2.2 skrll 763 1.32.2.2 skrll /* 764 1.32.2.2 skrll * Like find but search based on the channel too. 765 1.32.2.6 skrll * 766 1.32.2.6 skrll * Note that ieee80211_find_node_for_beacon does not increase the 767 1.32.2.6 skrll * reference count before returning the node, because drivers are not 768 1.32.2.6 skrll * expected to call it. 769 1.32.2.2 skrll */ 770 1.32.2.2 skrll struct ieee80211_node * 771 1.32.2.2 skrll ieee80211_find_node_for_beacon(struct ieee80211com *ic, u_int8_t *macaddr, 772 1.32.2.2 skrll struct ieee80211_channel *chan, char *ssid) 773 1.32.2.2 skrll { 774 1.32.2.3 skrll struct ieee80211_node *ni, *best; 775 1.32.2.2 skrll int hash; 776 1.32.2.3 skrll int best_score, score; 777 1.32.2.3 skrll 778 1.32.2.3 skrll best = NULL; 779 1.32.2.3 skrll best_score = -1; 780 1.32.2.2 skrll 781 1.32.2.2 skrll hash = IEEE80211_NODE_HASH(macaddr); 782 1.32.2.2 skrll IEEE80211_NODE_LOCK(ic); 783 1.32.2.2 skrll LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) { 784 1.32.2.3 skrll if (!IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) 785 1.32.2.3 skrll continue; 786 1.32.2.3 skrll 787 1.32.2.3 skrll score = (ni->ni_chan == chan) ? 1 : 0; 788 1.32.2.3 skrll 789 1.32.2.3 skrll if (ssid[1] == 0 || ni->ni_esslen == 0) 790 1.32.2.3 skrll score++; 791 1.32.2.3 skrll else if (ssid[1] != ni->ni_esslen || 792 1.32.2.3 skrll memcmp(ssid + 2, ni->ni_essid, ssid[1]) != 0) 793 1.32.2.3 skrll continue; 794 1.32.2.3 skrll 795 1.32.2.3 skrll if (score > best_score) { 796 1.32.2.6 skrll best = ni; 797 1.32.2.3 skrll best_score = score; 798 1.32.2.2 skrll } 799 1.32.2.2 skrll } 800 1.32.2.2 skrll IEEE80211_NODE_UNLOCK(ic); 801 1.32.2.3 skrll return best; 802 1.32.2.2 skrll } 803 1.32.2.2 skrll 804 1.32.2.2 skrll static void 805 1.32.2.3 skrll ieee80211_free_node(struct ieee80211com *ic, struct ieee80211_node *ni) 806 1.32.2.2 skrll { 807 1.32.2.2 skrll IASSERT(ni != ic->ic_bss, ("freeing bss node")); 808 1.32.2.2 skrll 809 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 810 1.32.2.2 skrll ("%s %s\n", __func__, ether_sprintf(ni->ni_macaddr))); 811 1.32.2.2 skrll IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 812 1.32.2.2 skrll TAILQ_REMOVE(&ic->ic_node, ni, ni_list); 813 1.32.2.2 skrll LIST_REMOVE(ni, ni_hash); 814 1.32.2.3 skrll ic->ic_nnodes--; 815 1.32.2.2 skrll if (!IF_IS_EMPTY(&ni->ni_savedq)) { 816 1.32.2.2 skrll IF_PURGE(&ni->ni_savedq); 817 1.32.2.2 skrll if (ic->ic_set_tim) 818 1.32.2.2 skrll (*ic->ic_set_tim)(ic, ni->ni_associd, 0); 819 1.32.2.2 skrll } 820 1.32.2.2 skrll if (TAILQ_EMPTY(&ic->ic_node)) 821 1.32.2.2 skrll ic->ic_inact_timer = 0; 822 1.32.2.2 skrll (*ic->ic_node_free)(ic, ni); 823 1.32.2.3 skrll /* TBD indicate to drivers that a new node can be allocated */ 824 1.32.2.2 skrll } 825 1.32.2.2 skrll 826 1.32.2.2 skrll void 827 1.32.2.3 skrll ieee80211_release_node(struct ieee80211com *ic, struct ieee80211_node *ni) 828 1.32.2.2 skrll { 829 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 830 1.32.2.2 skrll ("%s %s refcnt %d\n", __func__, 831 1.32.2.2 skrll ether_sprintf(ni->ni_macaddr), ni->ni_refcnt)); 832 1.32.2.3 skrll if (ieee80211_node_decref(ni) == 0 && 833 1.32.2.3 skrll ni->ni_state == IEEE80211_STA_COLLECT) { 834 1.32.2.2 skrll IEEE80211_NODE_LOCK_BH(ic); 835 1.32.2.3 skrll ieee80211_free_node(ic, ni); 836 1.32.2.2 skrll IEEE80211_NODE_UNLOCK_BH(ic); 837 1.32.2.2 skrll } 838 1.32.2.2 skrll } 839 1.32.2.2 skrll 840 1.32.2.2 skrll void 841 1.32.2.2 skrll ieee80211_free_allnodes(struct ieee80211com *ic) 842 1.32.2.2 skrll { 843 1.32.2.2 skrll struct ieee80211_node *ni; 844 1.32.2.2 skrll 845 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, ("free all nodes\n")); 846 1.32.2.2 skrll IEEE80211_NODE_LOCK_BH(ic); 847 1.32.2.2 skrll while ((ni = TAILQ_FIRST(&ic->ic_node)) != NULL) 848 1.32.2.3 skrll ieee80211_free_node(ic, ni); 849 1.32.2.2 skrll IEEE80211_NODE_UNLOCK_BH(ic); 850 1.32.2.2 skrll 851 1.32.2.2 skrll if (ic->ic_bss != NULL) 852 1.32.2.2 skrll node_cleanup(ic, ic->ic_bss); /* for station mode */ 853 1.32.2.2 skrll } 854 1.32.2.2 skrll 855 1.32.2.2 skrll /* 856 1.32.2.2 skrll * Timeout inactive nodes. Note that we cannot hold the node 857 1.32.2.2 skrll * lock while sending a frame as this would lead to a LOR. 858 1.32.2.2 skrll * Instead we use a generation number to mark nodes that we've 859 1.32.2.2 skrll * scanned and drop the lock and restart a scan if we have to 860 1.32.2.2 skrll * time out a node. Since we are single-threaded by virtue of 861 1.32.2.2 skrll * controlling the inactivity timer we can be sure this will 862 1.32.2.2 skrll * process each node only once. 863 1.32.2.2 skrll */ 864 1.32.2.2 skrll void 865 1.32.2.3 skrll ieee80211_clean_nodes(struct ieee80211com *ic) 866 1.32.2.2 skrll { 867 1.32.2.2 skrll struct ieee80211_node *ni; 868 1.32.2.2 skrll u_int gen = ic->ic_scangen++; /* NB: ok 'cuz single-threaded*/ 869 1.32.2.2 skrll 870 1.32.2.2 skrll restart: 871 1.32.2.2 skrll IEEE80211_NODE_LOCK(ic); 872 1.32.2.2 skrll TAILQ_FOREACH(ni, &ic->ic_node, ni_list) { 873 1.32.2.3 skrll if (ic->ic_nnodes <= ic->ic_max_nnodes) 874 1.32.2.3 skrll break; 875 1.32.2.2 skrll if (ni->ni_scangen == gen) /* previously handled */ 876 1.32.2.2 skrll continue; 877 1.32.2.2 skrll ni->ni_scangen = gen; 878 1.32.2.3 skrll if (ni->ni_refcnt > 0) 879 1.32.2.3 skrll continue; 880 1.32.2.3 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE, 881 1.32.2.3 skrll ("station %s purged from LRU cache\n", 882 1.32.2.3 skrll ether_sprintf(ni->ni_macaddr))); 883 1.32.2.3 skrll /* 884 1.32.2.3 skrll * Send a deauthenticate frame. 885 1.32.2.3 skrll * 886 1.32.2.3 skrll * Drop the node lock before sending the 887 1.32.2.3 skrll * deauthentication frame in case the driver takes 888 1.32.2.3 skrll * a lock, as this will result in a LOR between the 889 1.32.2.3 skrll * node lock and the driver lock. 890 1.32.2.3 skrll */ 891 1.32.2.3 skrll IEEE80211_NODE_UNLOCK(ic); 892 1.32.2.3 skrll if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 893 1.32.2.3 skrll IEEE80211_SEND_MGMT(ic, ni, 894 1.32.2.3 skrll IEEE80211_FC0_SUBTYPE_DEAUTH, 895 1.32.2.3 skrll IEEE80211_REASON_AUTH_EXPIRE); 896 1.32.2.3 skrll ieee80211_node_leave(ic, ni); 897 1.32.2.3 skrll } else 898 1.32.2.3 skrll ieee80211_free_node(ic, ni); 899 1.32.2.3 skrll ic->ic_stats.is_node_timeout++; 900 1.32.2.3 skrll goto restart; 901 1.32.2.2 skrll } 902 1.32.2.2 skrll IEEE80211_NODE_UNLOCK(ic); 903 1.32.2.2 skrll } 904 1.32.2.2 skrll 905 1.32.2.2 skrll void 906 1.32.2.2 skrll ieee80211_iterate_nodes(struct ieee80211com *ic, ieee80211_iter_func *f, void *arg) 907 1.32.2.2 skrll { 908 1.32.2.2 skrll struct ieee80211_node *ni; 909 1.32.2.2 skrll 910 1.32.2.2 skrll IEEE80211_NODE_LOCK(ic); 911 1.32.2.2 skrll TAILQ_FOREACH(ni, &ic->ic_node, ni_list) 912 1.32.2.2 skrll (*f)(arg, ni); 913 1.32.2.2 skrll IEEE80211_NODE_UNLOCK(ic); 914 1.32.2.2 skrll } 915 1.32.2.2 skrll 916 1.32.2.2 skrll void 917 1.32.2.2 skrll ieee80211_node_join(struct ieee80211com *ic, struct ieee80211_node *ni, int resp) 918 1.32.2.2 skrll { 919 1.32.2.2 skrll int newassoc; 920 1.32.2.2 skrll 921 1.32.2.2 skrll if (ni->ni_associd == 0) { 922 1.32.2.2 skrll u_int16_t aid; 923 1.32.2.2 skrll 924 1.32.2.2 skrll /* 925 1.32.2.2 skrll * It would be clever to search the bitmap 926 1.32.2.2 skrll * more efficiently, but this will do for now. 927 1.32.2.2 skrll */ 928 1.32.2.2 skrll for (aid = 1; aid < ic->ic_max_aid; aid++) { 929 1.32.2.2 skrll if (!IEEE80211_AID_ISSET(aid, 930 1.32.2.2 skrll ic->ic_aid_bitmap)) 931 1.32.2.2 skrll break; 932 1.32.2.2 skrll } 933 1.32.2.2 skrll if (aid >= ic->ic_max_aid) { 934 1.32.2.2 skrll IEEE80211_SEND_MGMT(ic, ni, resp, 935 1.32.2.2 skrll IEEE80211_REASON_ASSOC_TOOMANY); 936 1.32.2.2 skrll ieee80211_node_leave(ic, ni); 937 1.32.2.2 skrll return; 938 1.32.2.2 skrll } 939 1.32.2.2 skrll ni->ni_associd = aid | 0xc000; 940 1.32.2.2 skrll IEEE80211_AID_SET(ni->ni_associd, ic->ic_aid_bitmap); 941 1.32.2.2 skrll newassoc = 1; 942 1.32.2.2 skrll /* XXX for 11g must turn off short slot time if long 943 1.32.2.2 skrll slot time sta associates */ 944 1.32.2.2 skrll } else 945 1.32.2.2 skrll newassoc = 0; 946 1.32.2.2 skrll 947 1.32.2.2 skrll IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, 948 1.32.2.2 skrll ("station %s %s associated at aid %d\n", 949 1.32.2.2 skrll ether_sprintf(ni->ni_macaddr), 950 1.32.2.2 skrll (newassoc ? "newly" : "already"), 951 1.32.2.2 skrll ni->ni_associd & ~0xc000)); 952 1.32.2.2 skrll 953 1.32.2.2 skrll /* give driver a chance to setup state like ni_txrate */ 954 1.32.2.2 skrll if (ic->ic_newassoc) 955 1.32.2.2 skrll (*ic->ic_newassoc)(ic, ni, newassoc); 956 1.32.2.2 skrll IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 957 1.32.2.3 skrll ieee80211_node_newstate(ni, IEEE80211_STA_ASSOC); 958 1.32.2.2 skrll } 959 1.32.2.2 skrll 960 1.32.2.2 skrll /* 961 1.32.2.2 skrll * Handle bookkeeping for station deauthentication/disassociation 962 1.32.2.2 skrll * when operating as an ap. 963 1.32.2.2 skrll */ 964 1.32.2.2 skrll void 965 1.32.2.2 skrll ieee80211_node_leave(struct ieee80211com *ic, struct ieee80211_node *ni) 966 1.32.2.2 skrll { 967 1.32.2.2 skrll 968 1.32.2.2 skrll IASSERT(ic->ic_opmode == IEEE80211_M_HOSTAP, 969 1.32.2.2 skrll ("not in ap mode, mode %u", ic->ic_opmode)); 970 1.32.2.2 skrll /* 971 1.32.2.2 skrll * If node wasn't previously associated all 972 1.32.2.2 skrll * we need to do is reclaim the reference. 973 1.32.2.2 skrll */ 974 1.32.2.2 skrll if (ni->ni_associd == 0) 975 1.32.2.3 skrll return; 976 1.32.2.2 skrll IEEE80211_AID_CLR(ni->ni_associd, ic->ic_aid_bitmap); 977 1.32.2.2 skrll ni->ni_associd = 0; 978 1.32.2.3 skrll ieee80211_node_newstate(ni, IEEE80211_STA_COLLECT); 979 1.32.2.2 skrll } 980
Indexes created Tue Sep 30 20:09:53 GMT 2025