| 1 | /* |
| 2 | * Copyright (c) 2002 |
| 3 | * Thomas Skibo <skibo@pacbell.net>. 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 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by Thomas Skibo. |
| 16 | * 4. Neither the name of the author nor the names of any co-contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY Thomas Skibo AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL Thomas Skibo OR HIS DRINKING PALS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| 30 | * THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | * $FreeBSD: src/sys/dev/wi/wi_hostap.c,v 1.7.2.4 2002/08/02 07:11:34 imp Exp $ |
| 33 | * $DragonFly: src/sys/dev/netif/wi/Attic/wi_hostap.c,v 1.4 2003/06/25 03:55:51 dillon Exp $ |
| 34 | */ |
| 35 | |
| 36 | /* This is experimental Host AP software for Prism 2 802.11b interfaces. |
| 37 | * |
| 38 | * Much of this is based upon the "Linux Host AP driver Host AP driver |
| 39 | * for Intersil Prism2" by Jouni Malinen <jkm@ssh.com> or <jkmaline@cc.hut.fi>. |
| 40 | */ |
| 41 | |
| 42 | #include <sys/param.h> |
| 43 | #include <sys/systm.h> |
| 44 | #if __FreeBSD_version >= 500033 |
| 45 | #include <sys/endian.h> |
| 46 | #endif |
| 47 | #include <sys/sockio.h> |
| 48 | #include <sys/mbuf.h> |
| 49 | #include <sys/malloc.h> |
| 50 | #include <sys/kernel.h> |
| 51 | #include <sys/proc.h> |
| 52 | #include <sys/ucred.h> |
| 53 | #include <sys/socket.h> |
| 54 | #include <sys/module.h> |
| 55 | #include <sys/queue.h> |
| 56 | #include <sys/bus.h> |
| 57 | #include <sys/syslog.h> |
| 58 | #include <sys/sysctl.h> |
| 59 | |
| 60 | #include <machine/bus.h> |
| 61 | #include <machine/resource.h> |
| 62 | #include <machine/clock.h> |
| 63 | #include <machine/md_var.h> |
| 64 | #include <machine/bus_pio.h> |
| 65 | #include <sys/rman.h> |
| 66 | |
| 67 | #include <net/if.h> |
| 68 | #include <net/if_arp.h> |
| 69 | #include <net/ethernet.h> |
| 70 | #include <net/if_dl.h> |
| 71 | #include <net/if_media.h> |
| 72 | #include <net/if_types.h> |
| 73 | #include <net/if_ieee80211.h> |
| 74 | |
| 75 | #include <netinet/in.h> |
| 76 | #include <netinet/in_systm.h> |
| 77 | #include <netinet/in_var.h> |
| 78 | #include <netinet/ip.h> |
| 79 | #include <netinet/if_ether.h> |
| 80 | |
| 81 | #include <dev/wi/if_wavelan_ieee.h> |
| 82 | #include <dev/wi/wi_hostap.h> |
| 83 | #include <dev/wi/if_wivar.h> |
| 84 | #include <dev/wi/if_wireg.h> |
| 85 | |
| 86 | MALLOC_DEFINE(M_HAP_STA, "hostap_sta", "if_wi host AP mode station entry"); |
| 87 | |
| 88 | static void wihap_sta_timeout(void *v); |
| 89 | static struct wihap_sta_info *wihap_sta_alloc(struct wi_softc *sc, |
| 90 | u_int8_t *addr); |
| 91 | static void wihap_sta_delete(struct wihap_sta_info *sta); |
| 92 | static struct wihap_sta_info *wihap_sta_find(struct wihap_info *whi, |
| 93 | u_int8_t *addr); |
| 94 | static int wihap_sta_is_assoc(struct wihap_info *whi, u_int8_t addr[]); |
| 95 | static void wihap_auth_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 96 | caddr_t pkt, int len); |
| 97 | static void wihap_sta_deauth(struct wi_softc *sc, u_int8_t sta_addr[], |
| 98 | u_int16_t reason); |
| 99 | static void wihap_deauth_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 100 | caddr_t pkt, int len); |
| 101 | static void wihap_assoc_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 102 | caddr_t pkt, int len); |
| 103 | static void wihap_sta_disassoc(struct wi_softc *sc, u_int8_t sta_addr[], |
| 104 | u_int16_t reason); |
| 105 | static void wihap_disassoc_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 106 | caddr_t pkt, int len); |
| 107 | |
| 108 | /* |
| 109 | * Spl use in this driver. |
| 110 | * |
| 111 | * splnet is used everywhere here to block timeouts when we need to do |
| 112 | * so. |
| 113 | */ |
| 114 | |
| 115 | /* |
| 116 | * take_hword() |
| 117 | * |
| 118 | * Used for parsing management frames. The pkt pointer and length |
| 119 | * variables are updated after the value is removed. |
| 120 | */ |
| 121 | static __inline u_int16_t |
| 122 | take_hword(caddr_t *ppkt, int *plen) |
| 123 | { |
| 124 | u_int16_t s = le16toh(* (u_int16_t *) *ppkt); |
| 125 | *ppkt += sizeof(u_int16_t); |
| 126 | *plen -= sizeof(u_int16_t); |
| 127 | return s; |
| 128 | } |
| 129 | |
| 130 | /* take_tlv() |
| 131 | * |
| 132 | * Parse out TLV element from a packet, check for underflow of packet |
| 133 | * or overflow of buffer, update pkt/len. |
| 134 | */ |
| 135 | static int |
| 136 | take_tlv(caddr_t *ppkt, int *plen, int id_expect, void *dst, int maxlen) |
| 137 | { |
| 138 | u_int8_t id, len; |
| 139 | |
| 140 | if (*plen < 2) |
| 141 | return -1; |
| 142 | |
| 143 | id = ((u_int8_t *)*ppkt)[0]; |
| 144 | len = ((u_int8_t *)*ppkt)[1]; |
| 145 | |
| 146 | if (id != id_expect || *plen < len+2 || maxlen < len) |
| 147 | return -1; |
| 148 | |
| 149 | bcopy(*ppkt + 2, dst, len); |
| 150 | *plen -= 2 + len; |
| 151 | *ppkt += 2 + len; |
| 152 | |
| 153 | return (len); |
| 154 | } |
| 155 | |
| 156 | /* put_hword() |
| 157 | * Put half-word element into management frames. |
| 158 | */ |
| 159 | static __inline void |
| 160 | put_hword(caddr_t *ppkt, u_int16_t s) |
| 161 | { |
| 162 | * (u_int16_t *) *ppkt = htole16(s); |
| 163 | *ppkt += sizeof(u_int16_t); |
| 164 | } |
| 165 | |
| 166 | /* put_tlv() |
| 167 | * Put TLV elements into management frames. |
| 168 | */ |
| 169 | static void |
| 170 | put_tlv(caddr_t *ppkt, u_int8_t id, void *src, u_int8_t len) |
| 171 | { |
| 172 | (*ppkt)[0] = id; |
| 173 | (*ppkt)[1] = len; |
| 174 | bcopy(src, (*ppkt) + 2, len); |
| 175 | *ppkt += 2 + len; |
| 176 | } |
| 177 | |
| 178 | static int |
| 179 | put_rates(caddr_t *ppkt, u_int16_t rates) |
| 180 | { |
| 181 | u_int8_t ratebuf[8]; |
| 182 | int len = 0; |
| 183 | |
| 184 | if (rates & WI_SUPPRATES_1M) |
| 185 | ratebuf[len++] = 0x82; |
| 186 | if (rates & WI_SUPPRATES_2M) |
| 187 | ratebuf[len++] = 0x84; |
| 188 | if (rates & WI_SUPPRATES_5M) |
| 189 | ratebuf[len++] = 0x8b; |
| 190 | if (rates & WI_SUPPRATES_11M) |
| 191 | ratebuf[len++] = 0x96; |
| 192 | |
| 193 | put_tlv(ppkt, IEEE80211_ELEMID_RATES, ratebuf, len); |
| 194 | return len; |
| 195 | } |
| 196 | |
| 197 | /* wihap_init() |
| 198 | * |
| 199 | * Initialize host AP data structures. Called even if port type is |
| 200 | * not AP. |
| 201 | */ |
| 202 | void |
| 203 | wihap_init(struct wi_softc *sc) |
| 204 | { |
| 205 | int i; |
| 206 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 207 | |
| 208 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 209 | printf("wihap_init: sc=0x%x whi=0x%x\n", (int)sc, (int)whi); |
| 210 | |
| 211 | bzero(whi, sizeof(struct wihap_info)); |
| 212 | |
| 213 | if (sc->wi_ptype != WI_PORTTYPE_AP) |
| 214 | return; |
| 215 | |
| 216 | whi->apflags = WIHAPFL_ACTIVE; |
| 217 | |
| 218 | LIST_INIT(&whi->sta_list); |
| 219 | for (i = 0; i < WI_STA_HASH_SIZE; i++) |
| 220 | LIST_INIT(&whi->sta_hash[i]); |
| 221 | |
| 222 | whi->inactivity_time = WIHAP_DFLT_INACTIVITY_TIME; |
| 223 | } |
| 224 | |
| 225 | /* wihap_sta_disassoc() |
| 226 | * |
| 227 | * Send a disassociation frame to a specified station. |
| 228 | */ |
| 229 | static void |
| 230 | wihap_sta_disassoc(struct wi_softc *sc, u_int8_t sta_addr[], u_int16_t reason) |
| 231 | { |
| 232 | struct wi_80211_hdr *resp_hdr; |
| 233 | caddr_t pkt; |
| 234 | |
| 235 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 236 | printf("Sending disassoc to sta %6D\n", sta_addr, ":"); |
| 237 | |
| 238 | /* Send disassoc packet. */ |
| 239 | resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf; |
| 240 | bzero(resp_hdr, sizeof(struct wi_80211_hdr)); |
| 241 | resp_hdr->frame_ctl = WI_FTYPE_MGMT | WI_STYPE_MGMT_DISAS; |
| 242 | pkt = sc->wi_txbuf + sizeof(struct wi_80211_hdr); |
| 243 | |
| 244 | bcopy(sta_addr, resp_hdr->addr1, ETHER_ADDR_LEN); |
| 245 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN); |
| 246 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN); |
| 247 | |
| 248 | put_hword(&pkt, reason); |
| 249 | |
| 250 | wi_mgmt_xmit(sc, sc->wi_txbuf, 2 + sizeof(struct wi_80211_hdr)); |
| 251 | } |
| 252 | |
| 253 | /* wihap_sta_deauth() |
| 254 | * |
| 255 | * Send a deauthentication message to a specified station. |
| 256 | */ |
| 257 | static void |
| 258 | wihap_sta_deauth(struct wi_softc *sc, u_int8_t sta_addr[], u_int16_t reason) |
| 259 | { |
| 260 | struct wi_80211_hdr *resp_hdr; |
| 261 | caddr_t pkt; |
| 262 | |
| 263 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 264 | printf("Sending deauth to sta %6D\n", sta_addr, ":"); |
| 265 | |
| 266 | /* Send deauth packet. */ |
| 267 | resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf; |
| 268 | bzero(resp_hdr, sizeof(struct wi_80211_hdr)); |
| 269 | resp_hdr->frame_ctl = htole16(WI_FTYPE_MGMT | WI_STYPE_MGMT_DEAUTH); |
| 270 | pkt = sc->wi_txbuf + sizeof(struct wi_80211_hdr); |
| 271 | |
| 272 | bcopy(sta_addr, resp_hdr->addr1, ETHER_ADDR_LEN); |
| 273 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN); |
| 274 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN); |
| 275 | |
| 276 | put_hword(&pkt, reason); |
| 277 | |
| 278 | wi_mgmt_xmit(sc, sc->wi_txbuf, 2 + sizeof(struct wi_80211_hdr)); |
| 279 | } |
| 280 | |
| 281 | /* wihap_shutdown() |
| 282 | * |
| 283 | * Disassociate all stations and free up data structures. |
| 284 | */ |
| 285 | void |
| 286 | wihap_shutdown(struct wi_softc *sc) |
| 287 | { |
| 288 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 289 | struct wihap_sta_info *sta, *next; |
| 290 | int s; |
| 291 | |
| 292 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 293 | printf("wihap_shutdown: sc=0x%x whi=0x%x\n", |
| 294 | (int)sc, (int)whi); |
| 295 | |
| 296 | if (!(whi->apflags & WIHAPFL_ACTIVE)) |
| 297 | return; |
| 298 | |
| 299 | /* XXX: I read somewhere you can deauth all the stations with |
| 300 | * a single broadcast. Maybe try that someday. |
| 301 | */ |
| 302 | |
| 303 | s = splnet(); |
| 304 | sta = LIST_FIRST(&whi->sta_list); |
| 305 | while (sta) { |
| 306 | untimeout(wihap_sta_timeout, sta, sta->tmo); |
| 307 | if (!sc->wi_gone) { |
| 308 | /* Disassociate station. */ |
| 309 | if (sta->flags & WI_SIFLAGS_ASSOC) |
| 310 | wihap_sta_disassoc(sc, sta->addr, |
| 311 | IEEE80211_REASON_ASSOC_LEAVE); |
| 312 | /* Deauth station. */ |
| 313 | if (sta->flags & WI_SIFLAGS_AUTHEN) |
| 314 | wihap_sta_deauth(sc, sta->addr, |
| 315 | IEEE80211_REASON_AUTH_LEAVE); |
| 316 | } |
| 317 | |
| 318 | /* Delete the structure. */ |
| 319 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 320 | printf("wihap_shutdown: FREE(sta=0x%x)\n", (int)sta); |
| 321 | next = LIST_NEXT(sta, list); |
| 322 | FREE(sta, M_HAP_STA); |
| 323 | sta = next; |
| 324 | } |
| 325 | |
| 326 | whi->apflags = 0; |
| 327 | splx(s); |
| 328 | } |
| 329 | |
| 330 | /* sta_hash_func() |
| 331 | * Hash function for finding stations from ethernet address. |
| 332 | */ |
| 333 | static __inline int |
| 334 | sta_hash_func(u_int8_t addr[]) |
| 335 | { |
| 336 | return ((addr[3] + addr[4] + addr[5]) % WI_STA_HASH_SIZE); |
| 337 | } |
| 338 | |
| 339 | /* addr_cmp(): Maybe this is a faster way to compare addresses? */ |
| 340 | static __inline int |
| 341 | addr_cmp(u_int8_t a[], u_int8_t b[]) |
| 342 | { |
| 343 | return (*(u_int16_t *)(a + 4) == *(u_int16_t *)(b + 4) && |
| 344 | *(u_int32_t *)(a ) == *(u_int32_t *)(b)); |
| 345 | } |
| 346 | |
| 347 | void |
| 348 | wihap_sta_timeout(void *v) |
| 349 | { |
| 350 | struct wihap_sta_info *sta = v; |
| 351 | struct wi_softc *sc = sta->sc; |
| 352 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 353 | int s; |
| 354 | |
| 355 | s = splnet(); |
| 356 | if (sta->flags & WI_SIFLAGS_ASSOC) { |
| 357 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 358 | device_printf(sc->dev, "inactivity disassoc: %6D\n", |
| 359 | sta->addr, ":"); |
| 360 | |
| 361 | /* Disassoc station. */ |
| 362 | wihap_sta_disassoc(sc, sta->addr, |
| 363 | IEEE80211_REASON_ASSOC_EXPIRE); |
| 364 | sta->flags &= ~WI_SIFLAGS_ASSOC; |
| 365 | |
| 366 | sta->tmo = timeout(wihap_sta_timeout, sta, |
| 367 | hz * whi->inactivity_time); |
| 368 | |
| 369 | } else if (sta->flags & WI_SIFLAGS_AUTHEN) { |
| 370 | |
| 371 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 372 | device_printf(sc->dev, "inactivity disassoc: %6D\n", |
| 373 | sta->addr, ":"); |
| 374 | |
| 375 | /* Deauthenticate station. */ |
| 376 | wihap_sta_deauth(sc, sta->addr, IEEE80211_REASON_AUTH_EXPIRE); |
| 377 | sta->flags &= ~WI_SIFLAGS_AUTHEN; |
| 378 | |
| 379 | /* Delete the station if it's not permanent. */ |
| 380 | if (!(sta->flags & WI_SIFLAGS_PERM)) |
| 381 | wihap_sta_delete(sta); |
| 382 | } |
| 383 | splx(s); |
| 384 | } |
| 385 | |
| 386 | /* wihap_sta_delete() |
| 387 | * Delete a single station and free up its data structure. |
| 388 | */ |
| 389 | static void |
| 390 | wihap_sta_delete(struct wihap_sta_info *sta) |
| 391 | { |
| 392 | struct wi_softc *sc = sta->sc; |
| 393 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 394 | int i = sta->asid - 0xc001; |
| 395 | |
| 396 | untimeout(wihap_sta_timeout, sta, sta->tmo); |
| 397 | |
| 398 | whi->asid_inuse_mask[i >> 4] &= ~(1UL << (i & 0xf)); |
| 399 | |
| 400 | LIST_REMOVE(sta, list); |
| 401 | LIST_REMOVE(sta, hash); |
| 402 | if (sta->challenge) |
| 403 | FREE(sta->challenge, M_TEMP); |
| 404 | FREE(sta, M_HAP_STA); |
| 405 | whi->n_stations--; |
| 406 | } |
| 407 | |
| 408 | /* wihap_sta_alloc() |
| 409 | * |
| 410 | * Create a new station data structure and put it in the list |
| 411 | * and hash table. |
| 412 | */ |
| 413 | static struct wihap_sta_info * |
| 414 | wihap_sta_alloc(struct wi_softc *sc, u_int8_t *addr) |
| 415 | { |
| 416 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 417 | struct wihap_sta_info *sta; |
| 418 | int i, hash = sta_hash_func(addr); |
| 419 | |
| 420 | /* Allocate structure. */ |
| 421 | MALLOC(sta, struct wihap_sta_info *, sizeof(struct wihap_sta_info), |
| 422 | M_HAP_STA, M_NOWAIT); |
| 423 | if (sta == NULL) |
| 424 | return(NULL); |
| 425 | |
| 426 | bzero(sta, sizeof(struct wihap_sta_info)); |
| 427 | |
| 428 | /* Allocate an ASID. */ |
| 429 | i=hash<<4; |
| 430 | while (whi->asid_inuse_mask[i >> 4] & (1UL << (i & 0xf))) |
| 431 | i = (i == (WI_STA_HASH_SIZE << 4) - 1) ? 0 : (i + 1); |
| 432 | whi->asid_inuse_mask[i >> 4] |= (1UL << (i & 0xf)); |
| 433 | sta->asid = 0xc001 + i; |
| 434 | |
| 435 | /* Insert in list and hash list. */ |
| 436 | LIST_INSERT_HEAD(&whi->sta_list, sta, list); |
| 437 | LIST_INSERT_HEAD(&whi->sta_hash[hash], sta, hash); |
| 438 | |
| 439 | sta->sc = sc; |
| 440 | whi->n_stations++; |
| 441 | bcopy(addr, &sta->addr, ETHER_ADDR_LEN); |
| 442 | |
| 443 | return(sta); |
| 444 | } |
| 445 | |
| 446 | /* wihap_sta_find() |
| 447 | * |
| 448 | * Find station structure given address. |
| 449 | */ |
| 450 | static struct wihap_sta_info * |
| 451 | wihap_sta_find(struct wihap_info *whi, u_int8_t *addr) |
| 452 | { |
| 453 | int i; |
| 454 | struct wihap_sta_info *sta; |
| 455 | |
| 456 | i = sta_hash_func(addr); |
| 457 | LIST_FOREACH(sta, &whi->sta_hash[i], hash) |
| 458 | if (addr_cmp(addr,sta->addr)) |
| 459 | return sta; |
| 460 | |
| 461 | return (NULL); |
| 462 | } |
| 463 | |
| 464 | static int |
| 465 | wihap_check_rates(struct wihap_sta_info *sta, u_int8_t rates[], int rates_len) |
| 466 | { |
| 467 | struct wi_softc *sc = sta->sc; |
| 468 | int i; |
| 469 | |
| 470 | sta->rates = 0; |
| 471 | sta->tx_max_rate = 0; |
| 472 | for (i=0; i<rates_len; i++) |
| 473 | switch (rates[i] & 0x7f) { |
| 474 | case 0x02: |
| 475 | sta->rates |= WI_SUPPRATES_1M; |
| 476 | break; |
| 477 | case 0x04: |
| 478 | sta->rates |= WI_SUPPRATES_2M; |
| 479 | if (sta->tx_max_rate<1) |
| 480 | sta->tx_max_rate = 1; |
| 481 | break; |
| 482 | case 0x0b: |
| 483 | sta->rates |= WI_SUPPRATES_5M; |
| 484 | if (sta->tx_max_rate<2) |
| 485 | sta->tx_max_rate = 2; |
| 486 | break; |
| 487 | case 0x16: |
| 488 | sta->rates |= WI_SUPPRATES_11M; |
| 489 | sta->tx_max_rate = 3; |
| 490 | break; |
| 491 | } |
| 492 | |
| 493 | sta->rates &= sc->wi_supprates; |
| 494 | sta->tx_curr_rate = sta->tx_max_rate; |
| 495 | |
| 496 | return (sta->rates == 0 ? -1 : 0); |
| 497 | } |
| 498 | |
| 499 | |
| 500 | /* wihap_auth_req() |
| 501 | * |
| 502 | * Handle incoming authentication request. Only handle OPEN |
| 503 | * requests. |
| 504 | */ |
| 505 | static void |
| 506 | wihap_auth_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 507 | caddr_t pkt, int len) |
| 508 | { |
| 509 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 510 | struct wihap_sta_info *sta; |
| 511 | |
| 512 | u_int16_t algo; |
| 513 | u_int16_t seq; |
| 514 | u_int16_t status; |
| 515 | int i, challenge_len; |
| 516 | u_int32_t challenge[32]; |
| 517 | |
| 518 | struct wi_80211_hdr *resp_hdr; |
| 519 | |
| 520 | if (len < 6) |
| 521 | return; |
| 522 | |
| 523 | /* Break open packet. */ |
| 524 | algo = take_hword(&pkt, &len); |
| 525 | seq = take_hword(&pkt, &len); |
| 526 | status = take_hword(&pkt, &len); |
| 527 | challenge_len = 0; |
| 528 | if (len > 0 && (challenge_len = take_tlv(&pkt, &len, |
| 529 | IEEE80211_ELEMID_CHALLENGE, challenge, sizeof(challenge))) < 0) |
| 530 | return; |
| 531 | |
| 532 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 533 | printf("wihap_auth_req: station %6D algo=0x%x seq=0x%x\n", |
| 534 | rxfrm->wi_addr2, ":", algo, seq); |
| 535 | |
| 536 | /* Find or create station info. */ |
| 537 | sta = wihap_sta_find(whi, rxfrm->wi_addr2); |
| 538 | if (sta == NULL) { |
| 539 | |
| 540 | /* Are we allowing new stations? |
| 541 | */ |
| 542 | if (whi->apflags & WIHAPFL_MAC_FILT) { |
| 543 | status = IEEE80211_STATUS_OTHER; /* XXX */ |
| 544 | goto fail; |
| 545 | } |
| 546 | |
| 547 | /* Check for too many stations. |
| 548 | */ |
| 549 | if (whi->n_stations >= WIHAP_MAX_STATIONS) { |
| 550 | status = IEEE80211_STATUS_TOO_MANY_STATIONS; |
| 551 | goto fail; |
| 552 | } |
| 553 | |
| 554 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 555 | printf("wihap_auth_req: new station\n"); |
| 556 | |
| 557 | /* Create new station. */ |
| 558 | sta = wihap_sta_alloc(sc, rxfrm->wi_addr2); |
| 559 | if (sta == NULL) { |
| 560 | /* Out of memory! */ |
| 561 | status = IEEE80211_STATUS_TOO_MANY_STATIONS; |
| 562 | goto fail; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | /* Note: it's okay to leave the station info structure around |
| 567 | * if the authen fails. It'll be timed out eventually. |
| 568 | */ |
| 569 | switch (algo) { |
| 570 | case IEEE80211_AUTH_ALG_OPEN: |
| 571 | if (sc->wi_authmode != IEEE80211_AUTH_OPEN) { |
| 572 | seq = 2; |
| 573 | status = IEEE80211_STATUS_ALG; |
| 574 | goto fail; |
| 575 | } |
| 576 | if (seq != 1) { |
| 577 | seq = 2; |
| 578 | status = IEEE80211_STATUS_SEQUENCE; |
| 579 | goto fail; |
| 580 | } |
| 581 | challenge_len = 0; |
| 582 | seq = 2; |
| 583 | sta->flags |= WI_SIFLAGS_AUTHEN; |
| 584 | break; |
| 585 | case IEEE80211_AUTH_ALG_SHARED: |
| 586 | if (sc->wi_authmode != IEEE80211_AUTH_SHARED) { |
| 587 | seq = 2; |
| 588 | status = IEEE80211_STATUS_ALG; |
| 589 | goto fail; |
| 590 | } |
| 591 | switch (seq) { |
| 592 | case 1: |
| 593 | /* Create a challenge frame. */ |
| 594 | if (!sta->challenge) { |
| 595 | MALLOC(sta->challenge, u_int32_t *, 128, |
| 596 | M_TEMP, M_NOWAIT); |
| 597 | if (!sta->challenge) |
| 598 | return; |
| 599 | } |
| 600 | for (i = 0; i < 32; i++) |
| 601 | challenge[i] = sta->challenge[i] = |
| 602 | arc4random(); |
| 603 | challenge_len = 128; |
| 604 | seq = 2; |
| 605 | break; |
| 606 | case 3: |
| 607 | if (challenge_len != 128 || !sta->challenge || |
| 608 | !(le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_WEP)) { |
| 609 | status = IEEE80211_STATUS_CHALLENGE; |
| 610 | goto fail; |
| 611 | } |
| 612 | challenge_len = 0; |
| 613 | seq = 4; |
| 614 | |
| 615 | /* Check the challenge text. (Was decrypted by |
| 616 | * the adapter.) |
| 617 | */ |
| 618 | for (i=0; i<32; i++) |
| 619 | if (sta->challenge[i] != challenge[i]) { |
| 620 | status = IEEE80211_STATUS_CHALLENGE; |
| 621 | FREE(sta->challenge, M_TEMP); |
| 622 | sta->challenge = NULL; |
| 623 | goto fail; |
| 624 | } |
| 625 | |
| 626 | sta->flags |= WI_SIFLAGS_AUTHEN; |
| 627 | FREE(sta->challenge, M_TEMP); |
| 628 | sta->challenge = NULL; |
| 629 | break; |
| 630 | default: |
| 631 | seq = 2; |
| 632 | status = IEEE80211_STATUS_SEQUENCE; |
| 633 | goto fail; |
| 634 | } /* switch (seq) */ |
| 635 | break; |
| 636 | default: |
| 637 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 638 | printf("wihap_auth_req: algorithm unsupported: 0x%x\n", |
| 639 | algo); |
| 640 | status = IEEE80211_STATUS_ALG; |
| 641 | goto fail; |
| 642 | } /* switch (algo) */ |
| 643 | |
| 644 | status = IEEE80211_STATUS_SUCCESS; |
| 645 | |
| 646 | fail: |
| 647 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 648 | printf("wihap_auth_req: returns status=0x%x\n", status); |
| 649 | |
| 650 | /* Send response. */ |
| 651 | resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf; |
| 652 | bzero(resp_hdr, sizeof(struct wi_80211_hdr)); |
| 653 | resp_hdr->frame_ctl = htole16(WI_FTYPE_MGMT | WI_STYPE_MGMT_AUTH); |
| 654 | bcopy(rxfrm->wi_addr2, resp_hdr->addr1, ETHER_ADDR_LEN); |
| 655 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN); |
| 656 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN); |
| 657 | pkt = &sc->wi_txbuf[sizeof(struct wi_80211_hdr)]; |
| 658 | put_hword(&pkt, algo); |
| 659 | put_hword(&pkt, seq); |
| 660 | put_hword(&pkt, status); |
| 661 | if (challenge_len > 0) |
| 662 | put_tlv(&pkt, IEEE80211_ELEMID_CHALLENGE, |
| 663 | challenge, challenge_len); |
| 664 | wi_mgmt_xmit(sc, sc->wi_txbuf, (char *) pkt - (char *) sc->wi_txbuf); |
| 665 | } |
| 666 | |
| 667 | /* wihap_assoc_req() |
| 668 | * |
| 669 | * Handle incoming association and reassociation requests. |
| 670 | */ |
| 671 | static void |
| 672 | wihap_assoc_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 673 | caddr_t pkt, int len) |
| 674 | { |
| 675 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 676 | struct wihap_sta_info *sta; |
| 677 | struct wi_80211_hdr *resp_hdr; |
| 678 | u_int16_t capinfo; |
| 679 | u_int16_t lstintvl; |
| 680 | u_int8_t rates[8]; |
| 681 | int ssid_len, rates_len; |
| 682 | char ssid[33]; |
| 683 | u_int16_t status; |
| 684 | u_int16_t asid = 0; |
| 685 | |
| 686 | if (len < 8) |
| 687 | return; |
| 688 | |
| 689 | /* Pull out request parameters. */ |
| 690 | capinfo = take_hword(&pkt, &len); |
| 691 | lstintvl = take_hword(&pkt, &len); |
| 692 | |
| 693 | if ((rxfrm->wi_frame_ctl & htole16(WI_FCTL_STYPE)) == |
| 694 | htole16(WI_STYPE_MGMT_REASREQ)) { |
| 695 | if (len < 6) |
| 696 | return; |
| 697 | /* Eat the MAC address of the current AP */ |
| 698 | take_hword(&pkt, &len); |
| 699 | take_hword(&pkt, &len); |
| 700 | take_hword(&pkt, &len); |
| 701 | } |
| 702 | |
| 703 | if ((ssid_len = take_tlv(&pkt, &len, IEEE80211_ELEMID_SSID, |
| 704 | ssid, sizeof(ssid) - 1))<0) |
| 705 | return; |
| 706 | ssid[ssid_len] = '\0'; |
| 707 | if ((rates_len = take_tlv(&pkt, &len, IEEE80211_ELEMID_RATES, |
| 708 | rates, sizeof(rates)))<0) |
| 709 | return; |
| 710 | |
| 711 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 712 | printf("wihap_assoc_req: from station %6D\n", |
| 713 | rxfrm->wi_addr2, ":"); |
| 714 | |
| 715 | /* If SSID doesn't match, simply drop. */ |
| 716 | if (strcmp(sc->wi_net_name, ssid) != 0) { |
| 717 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 718 | printf("wihap_assoc_req: bad ssid: '%s' != '%s'\n", |
| 719 | ssid, sc->wi_net_name); |
| 720 | return; |
| 721 | } |
| 722 | |
| 723 | /* Is this station authenticated yet? */ |
| 724 | sta = wihap_sta_find(whi, rxfrm->wi_addr2); |
| 725 | if (sta == NULL || !(sta->flags & WI_SIFLAGS_AUTHEN)) { |
| 726 | wihap_sta_deauth(sc, rxfrm->wi_addr2, |
| 727 | IEEE80211_REASON_NOT_AUTHED); |
| 728 | return; |
| 729 | } |
| 730 | |
| 731 | /* Check supported rates against ours. */ |
| 732 | if (wihap_check_rates(sta, rates, rates_len) < 0) { |
| 733 | status = IEEE80211_STATUS_RATES; |
| 734 | goto fail; |
| 735 | } |
| 736 | |
| 737 | /* Check capinfo. |
| 738 | * Check for ESS, not IBSS. |
| 739 | * Check WEP/PRIVACY flags match. |
| 740 | * Refuse stations requesting to be put on CF-polling list. |
| 741 | */ |
| 742 | sta->capinfo = capinfo; |
| 743 | status = IEEE80211_STATUS_CAPINFO; |
| 744 | if ((capinfo & (IEEE80211_CAPINFO_ESS | IEEE80211_CAPINFO_IBSS)) != |
| 745 | IEEE80211_CAPINFO_ESS) { |
| 746 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 747 | printf("wihap_assoc_req: capinfo mismatch: " |
| 748 | "client using IBSS mode\n"); |
| 749 | goto fail; |
| 750 | |
| 751 | } |
| 752 | if ((sc->wi_use_wep && !(capinfo & IEEE80211_CAPINFO_PRIVACY)) || |
| 753 | (!sc->wi_use_wep && (capinfo & IEEE80211_CAPINFO_PRIVACY))) { |
| 754 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 755 | printf("wihap_assoc_req: capinfo mismatch: client " |
| 756 | "%susing WEP\n", sc->wi_use_wep ? "not " : ""); |
| 757 | goto fail; |
| 758 | } |
| 759 | if ((capinfo & (IEEE80211_CAPINFO_CF_POLLABLE | |
| 760 | IEEE80211_CAPINFO_CF_POLLREQ)) == IEEE80211_CAPINFO_CF_POLLABLE) { |
| 761 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 762 | printf("wihap_assoc_req: capinfo mismatch: " |
| 763 | "client requested CF polling\n"); |
| 764 | goto fail; |
| 765 | } |
| 766 | |
| 767 | /* Use ASID is allocated by whi_sta_alloc(). */ |
| 768 | asid = sta->asid; |
| 769 | |
| 770 | if (sta->flags & WI_SIFLAGS_ASSOC) { |
| 771 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 772 | printf("wihap_assoc_req: already assoc'ed?\n"); |
| 773 | } |
| 774 | |
| 775 | sta->flags |= WI_SIFLAGS_ASSOC; |
| 776 | sta->inactivity_timer = whi->inactivity_time; |
| 777 | status = IEEE80211_STATUS_SUCCESS; |
| 778 | |
| 779 | fail: |
| 780 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 781 | printf("wihap_assoc_req: returns status=0x%x\n", status); |
| 782 | |
| 783 | /* Send response. */ |
| 784 | resp_hdr = (struct wi_80211_hdr *) sc->wi_txbuf; |
| 785 | bzero(resp_hdr, sizeof(struct wi_80211_hdr)); |
| 786 | resp_hdr->frame_ctl = htole16(WI_FTYPE_MGMT | WI_STYPE_MGMT_ASRESP); |
| 787 | pkt = sc->wi_txbuf + sizeof(struct wi_80211_hdr); |
| 788 | |
| 789 | bcopy(rxfrm->wi_addr2, resp_hdr->addr1, ETHER_ADDR_LEN); |
| 790 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr2, ETHER_ADDR_LEN); |
| 791 | bcopy(sc->arpcom.ac_enaddr, resp_hdr->addr3, ETHER_ADDR_LEN); |
| 792 | |
| 793 | put_hword(&pkt, capinfo); |
| 794 | put_hword(&pkt, status); |
| 795 | put_hword(&pkt, asid); |
| 796 | rates_len = put_rates(&pkt, sc->wi_supprates); |
| 797 | |
| 798 | wi_mgmt_xmit(sc, sc->wi_txbuf, |
| 799 | 8 + rates_len + sizeof(struct wi_80211_hdr)); |
| 800 | } |
| 801 | |
| 802 | /* wihap_deauth_req() |
| 803 | * |
| 804 | * Handle deauthentication requests. Delete the station. |
| 805 | */ |
| 806 | static void |
| 807 | wihap_deauth_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 808 | caddr_t pkt, int len) |
| 809 | { |
| 810 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 811 | struct wihap_sta_info *sta; |
| 812 | u_int16_t reason; |
| 813 | |
| 814 | if (len<2) |
| 815 | return; |
| 816 | |
| 817 | reason = take_hword(&pkt, &len); |
| 818 | |
| 819 | sta = wihap_sta_find(whi, rxfrm->wi_addr2); |
| 820 | if (sta == NULL) { |
| 821 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 822 | printf("wihap_deauth_req: unknown station: %6D\n", |
| 823 | rxfrm->wi_addr2, ":"); |
| 824 | } |
| 825 | else |
| 826 | wihap_sta_delete(sta); |
| 827 | } |
| 828 | |
| 829 | /* wihap_disassoc_req() |
| 830 | * |
| 831 | * Handle disassociation requests. Just reset the assoc flag. |
| 832 | * We'll free up the station resources when we get a deauth |
| 833 | * request or when it times out. |
| 834 | */ |
| 835 | static void |
| 836 | wihap_disassoc_req(struct wi_softc *sc, struct wi_frame *rxfrm, |
| 837 | caddr_t pkt, int len) |
| 838 | { |
| 839 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 840 | struct wihap_sta_info *sta; |
| 841 | u_int16_t reason; |
| 842 | |
| 843 | if (len < 2) |
| 844 | return; |
| 845 | |
| 846 | reason = take_hword(&pkt, &len); |
| 847 | |
| 848 | sta = wihap_sta_find(whi, rxfrm->wi_addr2); |
| 849 | if (sta == NULL) { |
| 850 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 851 | printf("wihap_disassoc_req: unknown station: %6D\n", |
| 852 | rxfrm->wi_addr2, ":"); |
| 853 | } |
| 854 | else if (!(sta->flags & WI_SIFLAGS_AUTHEN)) { |
| 855 | /* |
| 856 | * If station is not authenticated, send deauthentication |
| 857 | * frame. |
| 858 | */ |
| 859 | wihap_sta_deauth(sc, rxfrm->wi_addr2, |
| 860 | IEEE80211_REASON_NOT_AUTHED); |
| 861 | return; |
| 862 | } |
| 863 | else |
| 864 | sta->flags &= ~WI_SIFLAGS_ASSOC; |
| 865 | } |
| 866 | |
| 867 | /* wihap_debug_frame_type() |
| 868 | * |
| 869 | * Print out frame type. Used in early debugging. |
| 870 | */ |
| 871 | static __inline void |
| 872 | wihap_debug_frame_type(struct wi_frame *rxfrm) |
| 873 | { |
| 874 | printf("wihap_mgmt_input: len=%d ", le16toh(rxfrm->wi_dat_len)); |
| 875 | |
| 876 | if ((rxfrm->wi_frame_ctl & htole16(WI_FCTL_FTYPE)) == |
| 877 | htole16(WI_FTYPE_MGMT)) { |
| 878 | |
| 879 | printf("MGMT: "); |
| 880 | |
| 881 | switch (le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_STYPE) { |
| 882 | case WI_STYPE_MGMT_ASREQ: |
| 883 | printf("assoc req: \n"); |
| 884 | break; |
| 885 | case WI_STYPE_MGMT_ASRESP: |
| 886 | printf("assoc resp: \n"); |
| 887 | break; |
| 888 | case WI_STYPE_MGMT_REASREQ: |
| 889 | printf("reassoc req: \n"); |
| 890 | break; |
| 891 | case WI_STYPE_MGMT_REASRESP: |
| 892 | printf("reassoc resp: \n"); |
| 893 | break; |
| 894 | case WI_STYPE_MGMT_PROBEREQ: |
| 895 | printf("probe req: \n"); |
| 896 | break; |
| 897 | case WI_STYPE_MGMT_PROBERESP: |
| 898 | printf("probe resp: \n"); |
| 899 | break; |
| 900 | case WI_STYPE_MGMT_BEACON: |
| 901 | printf("beacon: \n"); |
| 902 | break; |
| 903 | case WI_STYPE_MGMT_ATIM: |
| 904 | printf("ann traf ind \n"); |
| 905 | break; |
| 906 | case WI_STYPE_MGMT_DISAS: |
| 907 | printf("disassociation: \n"); |
| 908 | break; |
| 909 | case WI_STYPE_MGMT_AUTH: |
| 910 | printf("auth: \n"); |
| 911 | break; |
| 912 | case WI_STYPE_MGMT_DEAUTH: |
| 913 | printf("deauth: \n"); |
| 914 | break; |
| 915 | default: |
| 916 | printf("unknown (stype=0x%x)\n", |
| 917 | le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_STYPE); |
| 918 | } |
| 919 | |
| 920 | } |
| 921 | else { |
| 922 | printf("ftype=0x%x (ctl=0x%x)\n", |
| 923 | le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_FTYPE, |
| 924 | le16toh(rxfrm->wi_frame_ctl)); |
| 925 | } |
| 926 | } |
| 927 | |
| 928 | /* wihap_mgmt_input: |
| 929 | * |
| 930 | * Called for each management frame received in host ap mode. |
| 931 | * wihap_mgmt_input() is expected to free the mbuf. |
| 932 | */ |
| 933 | void |
| 934 | wihap_mgmt_input(struct wi_softc *sc, struct wi_frame *rxfrm, struct mbuf *m) |
| 935 | { |
| 936 | caddr_t pkt; |
| 937 | int s, len; |
| 938 | |
| 939 | if (sc->arpcom.ac_if.if_flags & IFF_DEBUG) |
| 940 | wihap_debug_frame_type(rxfrm); |
| 941 | |
| 942 | pkt = mtod(m, caddr_t) + WI_802_11_OFFSET_RAW; |
| 943 | len = m->m_len - WI_802_11_OFFSET_RAW; |
| 944 | |
| 945 | if ((rxfrm->wi_frame_ctl & htole16(WI_FCTL_FTYPE)) == |
| 946 | htole16(WI_FTYPE_MGMT)) { |
| 947 | |
| 948 | /* any of the following will mess w/ the station list */ |
| 949 | s = splnet(); |
| 950 | switch (le16toh(rxfrm->wi_frame_ctl) & WI_FCTL_STYPE) { |
| 951 | case WI_STYPE_MGMT_ASREQ: |
| 952 | wihap_assoc_req(sc, rxfrm, pkt, len); |
| 953 | break; |
| 954 | case WI_STYPE_MGMT_ASRESP: |
| 955 | break; |
| 956 | case WI_STYPE_MGMT_REASREQ: |
| 957 | wihap_assoc_req(sc, rxfrm, pkt, len); |
| 958 | break; |
| 959 | case WI_STYPE_MGMT_REASRESP: |
| 960 | break; |
| 961 | case WI_STYPE_MGMT_PROBEREQ: |
| 962 | break; |
| 963 | case WI_STYPE_MGMT_PROBERESP: |
| 964 | break; |
| 965 | case WI_STYPE_MGMT_BEACON: |
| 966 | break; |
| 967 | case WI_STYPE_MGMT_ATIM: |
| 968 | break; |
| 969 | case WI_STYPE_MGMT_DISAS: |
| 970 | wihap_disassoc_req(sc, rxfrm, pkt, len); |
| 971 | break; |
| 972 | case WI_STYPE_MGMT_AUTH: |
| 973 | wihap_auth_req(sc, rxfrm, pkt, len); |
| 974 | break; |
| 975 | case WI_STYPE_MGMT_DEAUTH: |
| 976 | wihap_deauth_req(sc, rxfrm, pkt, len); |
| 977 | break; |
| 978 | } |
| 979 | splx(s); |
| 980 | } |
| 981 | |
| 982 | m_freem(m); |
| 983 | } |
| 984 | |
| 985 | /* wihap_sta_is_assoc() |
| 986 | * |
| 987 | * Determine if a station is assoc'ed. Update its activity |
| 988 | * counter as a side-effect. |
| 989 | */ |
| 990 | static int |
| 991 | wihap_sta_is_assoc(struct wihap_info *whi, u_int8_t addr[]) |
| 992 | { |
| 993 | struct wihap_sta_info *sta; |
| 994 | int retval, s; |
| 995 | |
| 996 | s = splnet(); |
| 997 | retval = 0; |
| 998 | sta = wihap_sta_find(whi, addr); |
| 999 | if (sta != NULL && (sta->flags & WI_SIFLAGS_ASSOC)) { |
| 1000 | /* Keep it active. */ |
| 1001 | untimeout(wihap_sta_timeout, sta, sta->tmo); |
| 1002 | sta->tmo = timeout(wihap_sta_timeout, sta, |
| 1003 | hz * whi->inactivity_time); |
| 1004 | retval = 1; |
| 1005 | } |
| 1006 | splx(s); |
| 1007 | return (retval); |
| 1008 | } |
| 1009 | |
| 1010 | /* wihap_check_tx() |
| 1011 | * |
| 1012 | * Determine if a station is assoc'ed, get its tx rate, and update |
| 1013 | * its activity. |
| 1014 | */ |
| 1015 | int |
| 1016 | wihap_check_tx(struct wihap_info *whi, u_int8_t addr[], u_int8_t *txrate) |
| 1017 | { |
| 1018 | struct wihap_sta_info *sta; |
| 1019 | static u_int8_t txratetable[] = { 10, 20, 55, 110 }; |
| 1020 | int s; |
| 1021 | |
| 1022 | if (addr[0] & 0x01) { |
| 1023 | *txrate = 0; /* XXX: multicast rate? */ |
| 1024 | return(1); |
| 1025 | } |
| 1026 | s = splnet(); |
| 1027 | sta = wihap_sta_find(whi, addr); |
| 1028 | if (sta != NULL && (sta->flags & WI_SIFLAGS_ASSOC)) { |
| 1029 | /* Keep it active. */ |
| 1030 | untimeout(wihap_sta_timeout, sta, sta->tmo); |
| 1031 | sta->tmo = timeout(wihap_sta_timeout, sta, |
| 1032 | hz * whi->inactivity_time); |
| 1033 | *txrate = txratetable[ sta->tx_curr_rate ]; |
| 1034 | splx(s); |
| 1035 | return(1); |
| 1036 | } |
| 1037 | splx(s); |
| 1038 | |
| 1039 | return(0); |
| 1040 | } |
| 1041 | |
| 1042 | /* |
| 1043 | * wihap_data_input() |
| 1044 | * |
| 1045 | * Handle all data input on interface when in Host AP mode. |
| 1046 | * Some packets are destined for this machine, others are |
| 1047 | * repeated to other stations. |
| 1048 | * |
| 1049 | * If wihap_data_input() returns a non-zero, it has processed |
| 1050 | * the packet and will free the mbuf. |
| 1051 | */ |
| 1052 | int |
| 1053 | wihap_data_input(struct wi_softc *sc, struct wi_frame *rxfrm, struct mbuf *m) |
| 1054 | { |
| 1055 | struct ifnet *ifp = &sc->arpcom.ac_if; |
| 1056 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 1057 | struct wihap_sta_info *sta; |
| 1058 | int mcast, s; |
| 1059 | |
| 1060 | /* TODS flag must be set. */ |
| 1061 | if (!(rxfrm->wi_frame_ctl & htole16(WI_FCTL_TODS))) { |
| 1062 | if (ifp->if_flags & IFF_DEBUG) |
| 1063 | printf("wihap_data_input: no TODS src=%6D\n", |
| 1064 | rxfrm->wi_addr2, ":"); |
| 1065 | m_freem(m); |
| 1066 | return(1); |
| 1067 | } |
| 1068 | |
| 1069 | /* Check BSSID. (Is this necessary?) */ |
| 1070 | if (!addr_cmp(rxfrm->wi_addr1, sc->arpcom.ac_enaddr)) { |
| 1071 | if (ifp->if_flags & IFF_DEBUG) |
| 1072 | printf("wihap_data_input: incorrect bss: %6D\n", |
| 1073 | rxfrm->wi_addr1, ":"); |
| 1074 | m_freem(m); |
| 1075 | return (1); |
| 1076 | } |
| 1077 | |
| 1078 | s = splnet(); |
| 1079 | |
| 1080 | /* Find source station. */ |
| 1081 | sta = wihap_sta_find(whi, rxfrm->wi_addr2); |
| 1082 | |
| 1083 | /* Source station must be associated. */ |
| 1084 | if (sta == NULL || !(sta->flags & WI_SIFLAGS_ASSOC)) { |
| 1085 | if (ifp->if_flags & IFF_DEBUG) |
| 1086 | printf("wihap_data_input: dropping unassoc src %6D\n", |
| 1087 | rxfrm->wi_addr2, ":"); |
| 1088 | wihap_sta_disassoc(sc, rxfrm->wi_addr2, |
| 1089 | IEEE80211_REASON_ASSOC_LEAVE); |
| 1090 | splx(s); |
| 1091 | m_freem(m); |
| 1092 | return(1); |
| 1093 | } |
| 1094 | |
| 1095 | untimeout(wihap_sta_timeout, sta, sta->tmo); |
| 1096 | sta->tmo = timeout(wihap_sta_timeout, sta, |
| 1097 | hz * whi->inactivity_time); |
| 1098 | sta->sig_info = le16toh(rxfrm->wi_q_info); |
| 1099 | |
| 1100 | splx(s); |
| 1101 | |
| 1102 | /* Repeat this packet to BSS? */ |
| 1103 | mcast = (rxfrm->wi_addr3[0] & 0x01) != 0; |
| 1104 | if (mcast || wihap_sta_is_assoc(whi, rxfrm->wi_addr3)) { |
| 1105 | |
| 1106 | /* If it's multicast, make a copy. |
| 1107 | */ |
| 1108 | if (mcast) { |
| 1109 | m = m_copym(m, 0, M_COPYALL, M_DONTWAIT); |
| 1110 | if (m == NULL) |
| 1111 | return(0); |
| 1112 | m->m_flags |= M_MCAST; /* XXX */ |
| 1113 | } |
| 1114 | |
| 1115 | /* Queue up for repeating. |
| 1116 | */ |
| 1117 | IF_HANDOFF(&ifp->if_snd, m, ifp); |
| 1118 | return (!mcast); |
| 1119 | } |
| 1120 | |
| 1121 | return(0); |
| 1122 | } |
| 1123 | |
| 1124 | /* wihap_ioctl() |
| 1125 | * |
| 1126 | * Handle Host AP specific ioctls. Called from wi_ioctl(). |
| 1127 | */ |
| 1128 | int |
| 1129 | wihap_ioctl(struct wi_softc *sc, u_long command, caddr_t data) |
| 1130 | { |
| 1131 | struct ifreq *ifr = (struct ifreq *) data; |
| 1132 | struct wihap_info *whi = &sc->wi_hostap_info; |
| 1133 | struct wihap_sta_info *sta; |
| 1134 | struct hostap_getall reqall; |
| 1135 | struct hostap_sta reqsta; |
| 1136 | struct hostap_sta stabuf; |
| 1137 | int s, error = 0, n, flag; |
| 1138 | struct thread *td = curthread; |
| 1139 | |
| 1140 | if (!(sc->arpcom.ac_if.if_flags & IFF_RUNNING)) |
| 1141 | return ENODEV; |
| 1142 | |
| 1143 | switch (command) { |
| 1144 | case SIOCHOSTAP_DEL: |
| 1145 | if ((error = suser(td))) |
| 1146 | break; |
| 1147 | if ((error = copyin(ifr->ifr_data, &reqsta, sizeof(reqsta)))) |
| 1148 | break; |
| 1149 | s = splnet(); |
| 1150 | sta = wihap_sta_find(whi, reqsta.addr); |
| 1151 | if (sta == NULL) |
| 1152 | error = ENOENT; |
| 1153 | else { |
| 1154 | /* Disassociate station. */ |
| 1155 | if (sta->flags & WI_SIFLAGS_ASSOC) |
| 1156 | wihap_sta_disassoc(sc, sta->addr, |
| 1157 | IEEE80211_REASON_ASSOC_LEAVE); |
| 1158 | /* Deauth station. */ |
| 1159 | if (sta->flags & WI_SIFLAGS_AUTHEN) |
| 1160 | wihap_sta_deauth(sc, sta->addr, |
| 1161 | IEEE80211_REASON_AUTH_LEAVE); |
| 1162 | |
| 1163 | wihap_sta_delete(sta); |
| 1164 | } |
| 1165 | splx(s); |
| 1166 | break; |
| 1167 | |
| 1168 | case SIOCHOSTAP_GET: |
| 1169 | if ((error = copyin(ifr->ifr_data, &reqsta, sizeof(reqsta)))) |
| 1170 | break; |
| 1171 | s = splnet(); |
| 1172 | sta = wihap_sta_find(whi, reqsta.addr); |
| 1173 | if (sta == NULL) { |
| 1174 | error = ENOENT; |
| 1175 | splx(s); |
| 1176 | } else { |
| 1177 | reqsta.flags = sta->flags; |
| 1178 | reqsta.asid = sta->asid; |
| 1179 | reqsta.capinfo = sta->capinfo; |
| 1180 | reqsta.sig_info = sta->sig_info; |
| 1181 | reqsta.rates = sta->rates; |
| 1182 | splx(s); |
| 1183 | error = copyout(&reqsta, ifr->ifr_data, |
| 1184 | sizeof(reqsta)); |
| 1185 | } |
| 1186 | break; |
| 1187 | |
| 1188 | case SIOCHOSTAP_ADD: |
| 1189 | if ((error = suser(td))) |
| 1190 | break; |
| 1191 | if ((error = copyin(ifr->ifr_data, &reqsta, sizeof(reqsta)))) |
| 1192 | break; |
| 1193 | s = splnet(); |
| 1194 | sta = wihap_sta_find(whi, reqsta.addr); |
| 1195 | if (sta != NULL) { |
| 1196 | error = EEXIST; |
| 1197 | splx(s); |
| 1198 | break; |
| 1199 | } |
| 1200 | if (whi->n_stations >= WIHAP_MAX_STATIONS) { |
| 1201 | error = ENOSPC; |
| 1202 | splx(s); |
| 1203 | break; |
| 1204 | } |
| 1205 | sta = wihap_sta_alloc(sc, reqsta.addr); |
| 1206 | sta->flags = reqsta.flags; |
| 1207 | sta->tmo = timeout(wihap_sta_timeout, sta, |
| 1208 | hz * whi->inactivity_time); |
| 1209 | splx(s); |
| 1210 | break; |
| 1211 | |
| 1212 | case SIOCHOSTAP_SFLAGS: |
| 1213 | if ((error = suser(td))) |
| 1214 | break; |
| 1215 | if ((error = copyin(ifr->ifr_data, &flag, sizeof(int)))) |
| 1216 | break; |
| 1217 | |
| 1218 | whi->apflags = (whi->apflags & WIHAPFL_CANTCHANGE) | |
| 1219 | (flag & ~WIHAPFL_CANTCHANGE); |
| 1220 | break; |
| 1221 | |
| 1222 | case SIOCHOSTAP_GFLAGS: |
| 1223 | flag = (int) whi->apflags; |
| 1224 | error = copyout(&flag, ifr->ifr_data, sizeof(int)); |
| 1225 | break; |
| 1226 | |
| 1227 | case SIOCHOSTAP_GETALL: |
| 1228 | if ((error = copyin(ifr->ifr_data, &reqall, sizeof(reqall)))) |
| 1229 | break; |
| 1230 | |
| 1231 | reqall.nstations = whi->n_stations; |
| 1232 | n = 0; |
| 1233 | s = splnet(); |
| 1234 | sta = LIST_FIRST(&whi->sta_list); |
| 1235 | while (sta && reqall.size >= n+sizeof(struct hostap_sta)) { |
| 1236 | |
| 1237 | bcopy(sta->addr, stabuf.addr, ETHER_ADDR_LEN); |
| 1238 | stabuf.asid = sta->asid; |
| 1239 | stabuf.flags = sta->flags; |
| 1240 | stabuf.capinfo = sta->capinfo; |
| 1241 | stabuf.sig_info = sta->sig_info; |
| 1242 | stabuf.rates = sta->rates; |
| 1243 | |
| 1244 | error = copyout(&stabuf, (caddr_t) reqall.addr + n, |
| 1245 | sizeof(struct hostap_sta)); |
| 1246 | if (error) |
| 1247 | break; |
| 1248 | |
| 1249 | sta = LIST_NEXT(sta, list); |
| 1250 | n += sizeof(struct hostap_sta); |
| 1251 | } |
| 1252 | splx(s); |
| 1253 | |
| 1254 | if (!error) |
| 1255 | error = copyout(&reqall, ifr->ifr_data, |
| 1256 | sizeof(reqall)); |
| 1257 | break; |
| 1258 | default: |
| 1259 | printf("wihap_ioctl: i shouldn't get other ioctls!\n"); |
| 1260 | error = EINVAL; |
| 1261 | } |
| 1262 | |
| 1263 | return(error); |
| 1264 | } |