| 1 | /* Copyright (C) 2006, Red Hat, Inc. */ |
| 2 | |
| 3 | #include <linux/types.h> |
| 4 | #include <linux/etherdevice.h> |
| 5 | #include <linux/ieee80211.h> |
| 6 | #include <linux/if_arp.h> |
| 7 | #include <net/lib80211.h> |
| 8 | |
| 9 | #include "assoc.h" |
| 10 | #include "decl.h" |
| 11 | #include "host.h" |
| 12 | #include "scan.h" |
| 13 | #include "cmd.h" |
| 14 | |
| 15 | static const u8 bssid_any[ETH_ALEN] __attribute__ ((aligned (2))) = |
| 16 | { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; |
| 17 | static const u8 bssid_off[ETH_ALEN] __attribute__ ((aligned (2))) = |
| 18 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
| 19 | |
| 20 | /* The firmware needs the following bits masked out of the beacon-derived |
| 21 | * capability field when associating/joining to a BSS: |
| 22 | * 9 (QoS), 11 (APSD), 12 (unused), 14 (unused), 15 (unused) |
| 23 | */ |
| 24 | #define CAPINFO_MASK (~(0xda00)) |
| 25 | |
| 26 | |
| 27 | /** |
| 28 | * @brief This function finds common rates between rates and card rates. |
| 29 | * |
| 30 | * It will fill common rates in rates as output if found. |
| 31 | * |
| 32 | * NOTE: Setting the MSB of the basic rates need to be taken |
| 33 | * care, either before or after calling this function |
| 34 | * |
| 35 | * @param priv A pointer to struct lbs_private structure |
| 36 | * @param rates the buffer which keeps input and output |
| 37 | * @param rates_size the size of rate1 buffer; new size of buffer on return |
| 38 | * |
| 39 | * @return 0 on success, or -1 on error |
| 40 | */ |
| 41 | static int get_common_rates(struct lbs_private *priv, |
| 42 | u8 *rates, |
| 43 | u16 *rates_size) |
| 44 | { |
| 45 | u8 *card_rates = lbs_bg_rates; |
| 46 | size_t num_card_rates = sizeof(lbs_bg_rates); |
| 47 | int ret = 0, i, j; |
| 48 | u8 tmp[30]; |
| 49 | size_t tmp_size = 0; |
| 50 | |
| 51 | /* For each rate in card_rates that exists in rate1, copy to tmp */ |
| 52 | for (i = 0; card_rates[i] && (i < num_card_rates); i++) { |
| 53 | for (j = 0; rates[j] && (j < *rates_size); j++) { |
| 54 | if (rates[j] == card_rates[i]) |
| 55 | tmp[tmp_size++] = card_rates[i]; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | lbs_deb_hex(LBS_DEB_JOIN, "AP rates ", rates, *rates_size); |
| 60 | lbs_deb_hex(LBS_DEB_JOIN, "card rates ", card_rates, num_card_rates); |
| 61 | lbs_deb_hex(LBS_DEB_JOIN, "common rates", tmp, tmp_size); |
| 62 | lbs_deb_join("TX data rate 0x%02x\n", priv->cur_rate); |
| 63 | |
| 64 | if (!priv->enablehwauto) { |
| 65 | for (i = 0; i < tmp_size; i++) { |
| 66 | if (tmp[i] == priv->cur_rate) |
| 67 | goto done; |
| 68 | } |
| 69 | lbs_pr_alert("Previously set fixed data rate %#x isn't " |
| 70 | "compatible with the network.\n", priv->cur_rate); |
| 71 | ret = -1; |
| 72 | goto done; |
| 73 | } |
| 74 | ret = 0; |
| 75 | |
| 76 | done: |
| 77 | memset(rates, 0, *rates_size); |
| 78 | *rates_size = min_t(int, tmp_size, *rates_size); |
| 79 | memcpy(rates, tmp, *rates_size); |
| 80 | return ret; |
| 81 | } |
| 82 | |
| 83 | |
| 84 | /** |
| 85 | * @brief Sets the MSB on basic rates as the firmware requires |
| 86 | * |
| 87 | * Scan through an array and set the MSB for basic data rates. |
| 88 | * |
| 89 | * @param rates buffer of data rates |
| 90 | * @param len size of buffer |
| 91 | */ |
| 92 | static void lbs_set_basic_rate_flags(u8 *rates, size_t len) |
| 93 | { |
| 94 | int i; |
| 95 | |
| 96 | for (i = 0; i < len; i++) { |
| 97 | if (rates[i] == 0x02 || rates[i] == 0x04 || |
| 98 | rates[i] == 0x0b || rates[i] == 0x16) |
| 99 | rates[i] |= 0x80; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | |
| 104 | static u8 iw_auth_to_ieee_auth(u8 auth) |
| 105 | { |
| 106 | if (auth == IW_AUTH_ALG_OPEN_SYSTEM) |
| 107 | return 0x00; |
| 108 | else if (auth == IW_AUTH_ALG_SHARED_KEY) |
| 109 | return 0x01; |
| 110 | else if (auth == IW_AUTH_ALG_LEAP) |
| 111 | return 0x80; |
| 112 | |
| 113 | lbs_deb_join("%s: invalid auth alg 0x%X\n", __func__, auth); |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * @brief This function prepares the authenticate command. AUTHENTICATE only |
| 119 | * sets the authentication suite for future associations, as the firmware |
| 120 | * handles authentication internally during the ASSOCIATE command. |
| 121 | * |
| 122 | * @param priv A pointer to struct lbs_private structure |
| 123 | * @param bssid The peer BSSID with which to authenticate |
| 124 | * @param auth The authentication mode to use (from wireless.h) |
| 125 | * |
| 126 | * @return 0 or -1 |
| 127 | */ |
| 128 | static int lbs_set_authentication(struct lbs_private *priv, u8 bssid[6], u8 auth) |
| 129 | { |
| 130 | struct cmd_ds_802_11_authenticate cmd; |
| 131 | int ret = -1; |
| 132 | DECLARE_MAC_BUF(mac); |
| 133 | |
| 134 | lbs_deb_enter(LBS_DEB_JOIN); |
| 135 | |
| 136 | cmd.hdr.size = cpu_to_le16(sizeof(cmd)); |
| 137 | memcpy(cmd.bssid, bssid, ETH_ALEN); |
| 138 | |
| 139 | cmd.authtype = iw_auth_to_ieee_auth(auth); |
| 140 | |
| 141 | lbs_deb_join("AUTH_CMD: BSSID %s, auth 0x%x\n", |
| 142 | print_mac(mac, bssid), cmd.authtype); |
| 143 | |
| 144 | ret = lbs_cmd_with_response(priv, CMD_802_11_AUTHENTICATE, &cmd); |
| 145 | |
| 146 | lbs_deb_leave_args(LBS_DEB_JOIN, "ret %d", ret); |
| 147 | return ret; |
| 148 | } |
| 149 | |
| 150 | |
| 151 | static int lbs_assoc_post(struct lbs_private *priv, |
| 152 | struct cmd_ds_802_11_associate_response *resp) |
| 153 | { |
| 154 | int ret = 0; |
| 155 | union iwreq_data wrqu; |
| 156 | struct bss_descriptor *bss; |
| 157 | u16 status_code; |
| 158 | |
| 159 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 160 | |
| 161 | if (!priv->in_progress_assoc_req) { |
| 162 | lbs_deb_assoc("ASSOC_RESP: no in-progress assoc request\n"); |
| 163 | ret = -1; |
| 164 | goto done; |
| 165 | } |
| 166 | bss = &priv->in_progress_assoc_req->bss; |
| 167 | |
| 168 | /* |
| 169 | * Older FW versions map the IEEE 802.11 Status Code in the association |
| 170 | * response to the following values returned in resp->statuscode: |
| 171 | * |
| 172 | * IEEE Status Code Marvell Status Code |
| 173 | * 0 -> 0x0000 ASSOC_RESULT_SUCCESS |
| 174 | * 13 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED |
| 175 | * 14 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED |
| 176 | * 15 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED |
| 177 | * 16 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED |
| 178 | * others -> 0x0003 ASSOC_RESULT_REFUSED |
| 179 | * |
| 180 | * Other response codes: |
| 181 | * 0x0001 -> ASSOC_RESULT_INVALID_PARAMETERS (unused) |
| 182 | * 0x0002 -> ASSOC_RESULT_TIMEOUT (internal timer expired waiting for |
| 183 | * association response from the AP) |
| 184 | */ |
| 185 | |
| 186 | status_code = le16_to_cpu(resp->statuscode); |
| 187 | if (priv->fwrelease < 0x09000000) { |
| 188 | switch (status_code) { |
| 189 | case 0x00: |
| 190 | break; |
| 191 | case 0x01: |
| 192 | lbs_deb_assoc("ASSOC_RESP: invalid parameters\n"); |
| 193 | break; |
| 194 | case 0x02: |
| 195 | lbs_deb_assoc("ASSOC_RESP: internal timer " |
| 196 | "expired while waiting for the AP\n"); |
| 197 | break; |
| 198 | case 0x03: |
| 199 | lbs_deb_assoc("ASSOC_RESP: association " |
| 200 | "refused by AP\n"); |
| 201 | break; |
| 202 | case 0x04: |
| 203 | lbs_deb_assoc("ASSOC_RESP: authentication " |
| 204 | "refused by AP\n"); |
| 205 | break; |
| 206 | default: |
| 207 | lbs_deb_assoc("ASSOC_RESP: failure reason 0x%02x " |
| 208 | " unknown\n", status_code); |
| 209 | break; |
| 210 | } |
| 211 | } else { |
| 212 | /* v9+ returns the AP's association response */ |
| 213 | lbs_deb_assoc("ASSOC_RESP: failure reason 0x%02x\n", status_code); |
| 214 | } |
| 215 | |
| 216 | if (status_code) { |
| 217 | lbs_mac_event_disconnected(priv); |
| 218 | ret = -1; |
| 219 | goto done; |
| 220 | } |
| 221 | |
| 222 | lbs_deb_hex(LBS_DEB_ASSOC, "ASSOC_RESP", |
| 223 | (void *) (resp + sizeof (resp->hdr)), |
| 224 | le16_to_cpu(resp->hdr.size) - sizeof (resp->hdr)); |
| 225 | |
| 226 | /* Send a Media Connected event, according to the Spec */ |
| 227 | priv->connect_status = LBS_CONNECTED; |
| 228 | |
| 229 | /* Update current SSID and BSSID */ |
| 230 | memcpy(&priv->curbssparams.ssid, &bss->ssid, IW_ESSID_MAX_SIZE); |
| 231 | priv->curbssparams.ssid_len = bss->ssid_len; |
| 232 | memcpy(priv->curbssparams.bssid, bss->bssid, ETH_ALEN); |
| 233 | |
| 234 | priv->SNR[TYPE_RXPD][TYPE_AVG] = 0; |
| 235 | priv->NF[TYPE_RXPD][TYPE_AVG] = 0; |
| 236 | |
| 237 | memset(priv->rawSNR, 0x00, sizeof(priv->rawSNR)); |
| 238 | memset(priv->rawNF, 0x00, sizeof(priv->rawNF)); |
| 239 | priv->nextSNRNF = 0; |
| 240 | priv->numSNRNF = 0; |
| 241 | |
| 242 | netif_carrier_on(priv->dev); |
| 243 | if (!priv->tx_pending_len) |
| 244 | netif_wake_queue(priv->dev); |
| 245 | |
| 246 | memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid, ETH_ALEN); |
| 247 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
| 248 | wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL); |
| 249 | |
| 250 | done: |
| 251 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 252 | return ret; |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * @brief This function prepares an association-class command. |
| 257 | * |
| 258 | * @param priv A pointer to struct lbs_private structure |
| 259 | * @param assoc_req The association request describing the BSS to associate |
| 260 | * or reassociate with |
| 261 | * @param command The actual command, either CMD_802_11_ASSOCIATE or |
| 262 | * CMD_802_11_REASSOCIATE |
| 263 | * |
| 264 | * @return 0 or -1 |
| 265 | */ |
| 266 | static int lbs_associate(struct lbs_private *priv, |
| 267 | struct assoc_request *assoc_req, |
| 268 | u16 command) |
| 269 | { |
| 270 | struct cmd_ds_802_11_associate cmd; |
| 271 | int ret = 0; |
| 272 | struct bss_descriptor *bss = &assoc_req->bss; |
| 273 | u8 *pos = &(cmd.iebuf[0]); |
| 274 | u16 tmpcap, tmplen, tmpauth; |
| 275 | struct mrvl_ie_ssid_param_set *ssid; |
| 276 | struct mrvl_ie_ds_param_set *ds; |
| 277 | struct mrvl_ie_cf_param_set *cf; |
| 278 | struct mrvl_ie_rates_param_set *rates; |
| 279 | struct mrvl_ie_rsn_param_set *rsn; |
| 280 | struct mrvl_ie_auth_type *auth; |
| 281 | |
| 282 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 283 | |
| 284 | BUG_ON((command != CMD_802_11_ASSOCIATE) && |
| 285 | (command != CMD_802_11_REASSOCIATE)); |
| 286 | |
| 287 | memset(&cmd, 0, sizeof(cmd)); |
| 288 | cmd.hdr.command = cpu_to_le16(command); |
| 289 | |
| 290 | /* Fill in static fields */ |
| 291 | memcpy(cmd.bssid, bss->bssid, ETH_ALEN); |
| 292 | cmd.listeninterval = cpu_to_le16(MRVDRV_DEFAULT_LISTEN_INTERVAL); |
| 293 | |
| 294 | /* Capability info */ |
| 295 | tmpcap = (bss->capability & CAPINFO_MASK); |
| 296 | if (bss->mode == IW_MODE_INFRA) |
| 297 | tmpcap |= WLAN_CAPABILITY_ESS; |
| 298 | cmd.capability = cpu_to_le16(tmpcap); |
| 299 | lbs_deb_assoc("ASSOC_CMD: capability 0x%04x\n", tmpcap); |
| 300 | |
| 301 | /* SSID */ |
| 302 | ssid = (struct mrvl_ie_ssid_param_set *) pos; |
| 303 | ssid->header.type = cpu_to_le16(TLV_TYPE_SSID); |
| 304 | tmplen = bss->ssid_len; |
| 305 | ssid->header.len = cpu_to_le16(tmplen); |
| 306 | memcpy(ssid->ssid, bss->ssid, tmplen); |
| 307 | pos += sizeof(ssid->header) + tmplen; |
| 308 | |
| 309 | ds = (struct mrvl_ie_ds_param_set *) pos; |
| 310 | ds->header.type = cpu_to_le16(TLV_TYPE_PHY_DS); |
| 311 | ds->header.len = cpu_to_le16(1); |
| 312 | ds->channel = bss->phy.ds.channel; |
| 313 | pos += sizeof(ds->header) + 1; |
| 314 | |
| 315 | cf = (struct mrvl_ie_cf_param_set *) pos; |
| 316 | cf->header.type = cpu_to_le16(TLV_TYPE_CF); |
| 317 | tmplen = sizeof(*cf) - sizeof (cf->header); |
| 318 | cf->header.len = cpu_to_le16(tmplen); |
| 319 | /* IE payload should be zeroed, firmware fills it in for us */ |
| 320 | pos += sizeof(*cf); |
| 321 | |
| 322 | rates = (struct mrvl_ie_rates_param_set *) pos; |
| 323 | rates->header.type = cpu_to_le16(TLV_TYPE_RATES); |
| 324 | memcpy(&rates->rates, &bss->rates, MAX_RATES); |
| 325 | tmplen = MAX_RATES; |
| 326 | if (get_common_rates(priv, rates->rates, &tmplen)) { |
| 327 | ret = -1; |
| 328 | goto done; |
| 329 | } |
| 330 | pos += sizeof(rates->header) + tmplen; |
| 331 | rates->header.len = cpu_to_le16(tmplen); |
| 332 | lbs_deb_assoc("ASSOC_CMD: num rates %u\n", tmplen); |
| 333 | |
| 334 | /* Copy the infra. association rates into Current BSS state structure */ |
| 335 | memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates)); |
| 336 | memcpy(&priv->curbssparams.rates, &rates->rates, tmplen); |
| 337 | |
| 338 | /* Set MSB on basic rates as the firmware requires, but _after_ |
| 339 | * copying to current bss rates. |
| 340 | */ |
| 341 | lbs_set_basic_rate_flags(rates->rates, tmplen); |
| 342 | |
| 343 | /* Firmware v9+ indicate authentication suites as a TLV */ |
| 344 | if (priv->fwrelease >= 0x09000000) { |
| 345 | DECLARE_MAC_BUF(mac); |
| 346 | |
| 347 | auth = (struct mrvl_ie_auth_type *) pos; |
| 348 | auth->header.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE); |
| 349 | auth->header.len = cpu_to_le16(2); |
| 350 | tmpauth = iw_auth_to_ieee_auth(priv->secinfo.auth_mode); |
| 351 | auth->auth = cpu_to_le16(tmpauth); |
| 352 | pos += sizeof(auth->header) + 2; |
| 353 | |
| 354 | lbs_deb_join("AUTH_CMD: BSSID %s, auth 0x%x\n", |
| 355 | print_mac(mac, bss->bssid), priv->secinfo.auth_mode); |
| 356 | } |
| 357 | |
| 358 | /* WPA/WPA2 IEs */ |
| 359 | if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) { |
| 360 | rsn = (struct mrvl_ie_rsn_param_set *) pos; |
| 361 | /* WPA_IE or WPA2_IE */ |
| 362 | rsn->header.type = cpu_to_le16((u16) assoc_req->wpa_ie[0]); |
| 363 | tmplen = (u16) assoc_req->wpa_ie[1]; |
| 364 | rsn->header.len = cpu_to_le16(tmplen); |
| 365 | memcpy(rsn->rsnie, &assoc_req->wpa_ie[2], tmplen); |
| 366 | lbs_deb_hex(LBS_DEB_JOIN, "ASSOC_CMD: WPA/RSN IE", (u8 *) rsn, |
| 367 | sizeof(rsn->header) + tmplen); |
| 368 | pos += sizeof(rsn->header) + tmplen; |
| 369 | } |
| 370 | |
| 371 | cmd.hdr.size = cpu_to_le16((sizeof(cmd) - sizeof(cmd.iebuf)) + |
| 372 | (u16)(pos - (u8 *) &cmd.iebuf)); |
| 373 | |
| 374 | /* update curbssparams */ |
| 375 | priv->curbssparams.channel = bss->phy.ds.channel; |
| 376 | |
| 377 | if (lbs_parse_dnld_countryinfo_11d(priv, bss)) { |
| 378 | ret = -1; |
| 379 | goto done; |
| 380 | } |
| 381 | |
| 382 | ret = lbs_cmd_with_response(priv, command, &cmd); |
| 383 | if (ret == 0) { |
| 384 | ret = lbs_assoc_post(priv, |
| 385 | (struct cmd_ds_802_11_associate_response *) &cmd); |
| 386 | } |
| 387 | |
| 388 | done: |
| 389 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 390 | return ret; |
| 391 | } |
| 392 | |
| 393 | /** |
| 394 | * @brief Associate to a specific BSS discovered in a scan |
| 395 | * |
| 396 | * @param priv A pointer to struct lbs_private structure |
| 397 | * @param assoc_req The association request describing the BSS to associate with |
| 398 | * |
| 399 | * @return 0-success, otherwise fail |
| 400 | */ |
| 401 | static int lbs_try_associate(struct lbs_private *priv, |
| 402 | struct assoc_request *assoc_req) |
| 403 | { |
| 404 | int ret; |
| 405 | u8 preamble = RADIO_PREAMBLE_LONG; |
| 406 | |
| 407 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 408 | |
| 409 | /* FW v9 and higher indicate authentication suites as a TLV in the |
| 410 | * association command, not as a separate authentication command. |
| 411 | */ |
| 412 | if (priv->fwrelease < 0x09000000) { |
| 413 | ret = lbs_set_authentication(priv, assoc_req->bss.bssid, |
| 414 | priv->secinfo.auth_mode); |
| 415 | if (ret) |
| 416 | goto out; |
| 417 | } |
| 418 | |
| 419 | /* Use short preamble only when both the BSS and firmware support it */ |
| 420 | if ((priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && |
| 421 | (assoc_req->bss.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)) |
| 422 | preamble = RADIO_PREAMBLE_SHORT; |
| 423 | |
| 424 | ret = lbs_set_radio(priv, preamble, 1); |
| 425 | if (ret) |
| 426 | goto out; |
| 427 | |
| 428 | ret = lbs_associate(priv, assoc_req, CMD_802_11_ASSOCIATE); |
| 429 | |
| 430 | out: |
| 431 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 432 | return ret; |
| 433 | } |
| 434 | |
| 435 | static int lbs_adhoc_post(struct lbs_private *priv, |
| 436 | struct cmd_ds_802_11_ad_hoc_result *resp) |
| 437 | { |
| 438 | int ret = 0; |
| 439 | u16 command = le16_to_cpu(resp->hdr.command); |
| 440 | u16 result = le16_to_cpu(resp->hdr.result); |
| 441 | union iwreq_data wrqu; |
| 442 | struct bss_descriptor *bss; |
| 443 | DECLARE_SSID_BUF(ssid); |
| 444 | |
| 445 | lbs_deb_enter(LBS_DEB_JOIN); |
| 446 | |
| 447 | if (!priv->in_progress_assoc_req) { |
| 448 | lbs_deb_join("ADHOC_RESP: no in-progress association " |
| 449 | "request\n"); |
| 450 | ret = -1; |
| 451 | goto done; |
| 452 | } |
| 453 | bss = &priv->in_progress_assoc_req->bss; |
| 454 | |
| 455 | /* |
| 456 | * Join result code 0 --> SUCCESS |
| 457 | */ |
| 458 | if (result) { |
| 459 | lbs_deb_join("ADHOC_RESP: failed (result 0x%X)\n", result); |
| 460 | if (priv->connect_status == LBS_CONNECTED) |
| 461 | lbs_mac_event_disconnected(priv); |
| 462 | ret = -1; |
| 463 | goto done; |
| 464 | } |
| 465 | |
| 466 | /* Send a Media Connected event, according to the Spec */ |
| 467 | priv->connect_status = LBS_CONNECTED; |
| 468 | |
| 469 | if (command == CMD_RET(CMD_802_11_AD_HOC_START)) { |
| 470 | /* Update the created network descriptor with the new BSSID */ |
| 471 | memcpy(bss->bssid, resp->bssid, ETH_ALEN); |
| 472 | } |
| 473 | |
| 474 | /* Set the BSSID from the joined/started descriptor */ |
| 475 | memcpy(&priv->curbssparams.bssid, bss->bssid, ETH_ALEN); |
| 476 | |
| 477 | /* Set the new SSID to current SSID */ |
| 478 | memcpy(&priv->curbssparams.ssid, &bss->ssid, IW_ESSID_MAX_SIZE); |
| 479 | priv->curbssparams.ssid_len = bss->ssid_len; |
| 480 | |
| 481 | netif_carrier_on(priv->dev); |
| 482 | if (!priv->tx_pending_len) |
| 483 | netif_wake_queue(priv->dev); |
| 484 | |
| 485 | memset(&wrqu, 0, sizeof(wrqu)); |
| 486 | memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid, ETH_ALEN); |
| 487 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
| 488 | wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL); |
| 489 | |
| 490 | lbs_deb_join("ADHOC_RESP: Joined/started '%s', BSSID %pM, channel %d\n", |
| 491 | print_ssid(ssid, bss->ssid, bss->ssid_len), |
| 492 | priv->curbssparams.bssid, |
| 493 | priv->curbssparams.channel); |
| 494 | |
| 495 | done: |
| 496 | lbs_deb_leave_args(LBS_DEB_JOIN, "ret %d", ret); |
| 497 | return ret; |
| 498 | } |
| 499 | |
| 500 | /** |
| 501 | * @brief Join an adhoc network found in a previous scan |
| 502 | * |
| 503 | * @param priv A pointer to struct lbs_private structure |
| 504 | * @param assoc_req The association request describing the BSS to join |
| 505 | * |
| 506 | * @return 0 on success, error on failure |
| 507 | */ |
| 508 | static int lbs_adhoc_join(struct lbs_private *priv, |
| 509 | struct assoc_request *assoc_req) |
| 510 | { |
| 511 | struct cmd_ds_802_11_ad_hoc_join cmd; |
| 512 | struct bss_descriptor *bss = &assoc_req->bss; |
| 513 | u8 preamble = RADIO_PREAMBLE_LONG; |
| 514 | DECLARE_SSID_BUF(ssid); |
| 515 | u16 ratesize = 0; |
| 516 | int ret = 0; |
| 517 | |
| 518 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 519 | |
| 520 | lbs_deb_join("current SSID '%s', ssid length %u\n", |
| 521 | print_ssid(ssid, priv->curbssparams.ssid, |
| 522 | priv->curbssparams.ssid_len), |
| 523 | priv->curbssparams.ssid_len); |
| 524 | lbs_deb_join("requested ssid '%s', ssid length %u\n", |
| 525 | print_ssid(ssid, bss->ssid, bss->ssid_len), |
| 526 | bss->ssid_len); |
| 527 | |
| 528 | /* check if the requested SSID is already joined */ |
| 529 | if (priv->curbssparams.ssid_len && |
| 530 | !lbs_ssid_cmp(priv->curbssparams.ssid, |
| 531 | priv->curbssparams.ssid_len, |
| 532 | bss->ssid, bss->ssid_len) && |
| 533 | (priv->mode == IW_MODE_ADHOC) && |
| 534 | (priv->connect_status == LBS_CONNECTED)) { |
| 535 | union iwreq_data wrqu; |
| 536 | |
| 537 | lbs_deb_join("ADHOC_J_CMD: New ad-hoc SSID is the same as " |
| 538 | "current, not attempting to re-join"); |
| 539 | |
| 540 | /* Send the re-association event though, because the association |
| 541 | * request really was successful, even if just a null-op. |
| 542 | */ |
| 543 | memset(&wrqu, 0, sizeof(wrqu)); |
| 544 | memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid, |
| 545 | ETH_ALEN); |
| 546 | wrqu.ap_addr.sa_family = ARPHRD_ETHER; |
| 547 | wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL); |
| 548 | goto out; |
| 549 | } |
| 550 | |
| 551 | /* Use short preamble only when both the BSS and firmware support it */ |
| 552 | if ((priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) && |
| 553 | (bss->capability & WLAN_CAPABILITY_SHORT_PREAMBLE)) { |
| 554 | lbs_deb_join("AdhocJoin: Short preamble\n"); |
| 555 | preamble = RADIO_PREAMBLE_SHORT; |
| 556 | } |
| 557 | |
| 558 | ret = lbs_set_radio(priv, preamble, 1); |
| 559 | if (ret) |
| 560 | goto out; |
| 561 | |
| 562 | lbs_deb_join("AdhocJoin: channel = %d\n", assoc_req->channel); |
| 563 | lbs_deb_join("AdhocJoin: band = %c\n", assoc_req->band); |
| 564 | |
| 565 | priv->adhoccreate = 0; |
| 566 | priv->curbssparams.channel = bss->channel; |
| 567 | |
| 568 | /* Build the join command */ |
| 569 | memset(&cmd, 0, sizeof(cmd)); |
| 570 | cmd.hdr.size = cpu_to_le16(sizeof(cmd)); |
| 571 | |
| 572 | cmd.bss.type = CMD_BSS_TYPE_IBSS; |
| 573 | cmd.bss.beaconperiod = cpu_to_le16(bss->beaconperiod); |
| 574 | |
| 575 | memcpy(&cmd.bss.bssid, &bss->bssid, ETH_ALEN); |
| 576 | memcpy(&cmd.bss.ssid, &bss->ssid, bss->ssid_len); |
| 577 | |
| 578 | memcpy(&cmd.bss.ds, &bss->phy.ds, sizeof(struct ieee_ie_ds_param_set)); |
| 579 | |
| 580 | memcpy(&cmd.bss.ibss, &bss->ss.ibss, |
| 581 | sizeof(struct ieee_ie_ibss_param_set)); |
| 582 | |
| 583 | cmd.bss.capability = cpu_to_le16(bss->capability & CAPINFO_MASK); |
| 584 | lbs_deb_join("ADHOC_J_CMD: tmpcap=%4X CAPINFO_MASK=%4X\n", |
| 585 | bss->capability, CAPINFO_MASK); |
| 586 | |
| 587 | /* information on BSSID descriptor passed to FW */ |
| 588 | lbs_deb_join("ADHOC_J_CMD: BSSID = %pM, SSID = '%s'\n", |
| 589 | cmd.bss.bssid, cmd.bss.ssid); |
| 590 | |
| 591 | /* Only v8 and below support setting these */ |
| 592 | if (priv->fwrelease < 0x09000000) { |
| 593 | /* failtimeout */ |
| 594 | cmd.failtimeout = cpu_to_le16(MRVDRV_ASSOCIATION_TIME_OUT); |
| 595 | /* probedelay */ |
| 596 | cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME); |
| 597 | } |
| 598 | |
| 599 | /* Copy Data rates from the rates recorded in scan response */ |
| 600 | memset(cmd.bss.rates, 0, sizeof(cmd.bss.rates)); |
| 601 | ratesize = min_t(u16, sizeof(cmd.bss.rates), MAX_RATES); |
| 602 | memcpy(cmd.bss.rates, bss->rates, ratesize); |
| 603 | if (get_common_rates(priv, cmd.bss.rates, &ratesize)) { |
| 604 | lbs_deb_join("ADHOC_JOIN: get_common_rates returned error.\n"); |
| 605 | ret = -1; |
| 606 | goto out; |
| 607 | } |
| 608 | |
| 609 | /* Copy the ad-hoc creation rates into Current BSS state structure */ |
| 610 | memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates)); |
| 611 | memcpy(&priv->curbssparams.rates, cmd.bss.rates, ratesize); |
| 612 | |
| 613 | /* Set MSB on basic rates as the firmware requires, but _after_ |
| 614 | * copying to current bss rates. |
| 615 | */ |
| 616 | lbs_set_basic_rate_flags(cmd.bss.rates, ratesize); |
| 617 | |
| 618 | cmd.bss.ibss.atimwindow = bss->atimwindow; |
| 619 | |
| 620 | if (assoc_req->secinfo.wep_enabled) { |
| 621 | u16 tmp = le16_to_cpu(cmd.bss.capability); |
| 622 | tmp |= WLAN_CAPABILITY_PRIVACY; |
| 623 | cmd.bss.capability = cpu_to_le16(tmp); |
| 624 | } |
| 625 | |
| 626 | if (priv->psmode == LBS802_11POWERMODEMAX_PSP) { |
| 627 | __le32 local_ps_mode = cpu_to_le32(LBS802_11POWERMODECAM); |
| 628 | |
| 629 | /* wake up first */ |
| 630 | ret = lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE, |
| 631 | CMD_ACT_SET, 0, 0, |
| 632 | &local_ps_mode); |
| 633 | if (ret) { |
| 634 | ret = -1; |
| 635 | goto out; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | if (lbs_parse_dnld_countryinfo_11d(priv, bss)) { |
| 640 | ret = -1; |
| 641 | goto out; |
| 642 | } |
| 643 | |
| 644 | ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_JOIN, &cmd); |
| 645 | if (ret == 0) { |
| 646 | ret = lbs_adhoc_post(priv, |
| 647 | (struct cmd_ds_802_11_ad_hoc_result *)&cmd); |
| 648 | } |
| 649 | |
| 650 | out: |
| 651 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 652 | return ret; |
| 653 | } |
| 654 | |
| 655 | /** |
| 656 | * @brief Start an Adhoc Network |
| 657 | * |
| 658 | * @param priv A pointer to struct lbs_private structure |
| 659 | * @param assoc_req The association request describing the BSS to start |
| 660 | * |
| 661 | * @return 0 on success, error on failure |
| 662 | */ |
| 663 | static int lbs_adhoc_start(struct lbs_private *priv, |
| 664 | struct assoc_request *assoc_req) |
| 665 | { |
| 666 | struct cmd_ds_802_11_ad_hoc_start cmd; |
| 667 | u8 preamble = RADIO_PREAMBLE_LONG; |
| 668 | size_t ratesize = 0; |
| 669 | u16 tmpcap = 0; |
| 670 | int ret = 0; |
| 671 | DECLARE_SSID_BUF(ssid); |
| 672 | |
| 673 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 674 | |
| 675 | if (priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) { |
| 676 | lbs_deb_join("ADHOC_START: Will use short preamble\n"); |
| 677 | preamble = RADIO_PREAMBLE_SHORT; |
| 678 | } |
| 679 | |
| 680 | ret = lbs_set_radio(priv, preamble, 1); |
| 681 | if (ret) |
| 682 | goto out; |
| 683 | |
| 684 | /* Build the start command */ |
| 685 | memset(&cmd, 0, sizeof(cmd)); |
| 686 | cmd.hdr.size = cpu_to_le16(sizeof(cmd)); |
| 687 | |
| 688 | memcpy(cmd.ssid, assoc_req->ssid, assoc_req->ssid_len); |
| 689 | |
| 690 | lbs_deb_join("ADHOC_START: SSID '%s', ssid length %u\n", |
| 691 | print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len), |
| 692 | assoc_req->ssid_len); |
| 693 | |
| 694 | cmd.bsstype = CMD_BSS_TYPE_IBSS; |
| 695 | |
| 696 | if (priv->beacon_period == 0) |
| 697 | priv->beacon_period = MRVDRV_BEACON_INTERVAL; |
| 698 | cmd.beaconperiod = cpu_to_le16(priv->beacon_period); |
| 699 | |
| 700 | WARN_ON(!assoc_req->channel); |
| 701 | |
| 702 | /* set Physical parameter set */ |
| 703 | cmd.ds.header.id = WLAN_EID_DS_PARAMS; |
| 704 | cmd.ds.header.len = 1; |
| 705 | cmd.ds.channel = assoc_req->channel; |
| 706 | |
| 707 | /* set IBSS parameter set */ |
| 708 | cmd.ibss.header.id = WLAN_EID_IBSS_PARAMS; |
| 709 | cmd.ibss.header.len = 2; |
| 710 | cmd.ibss.atimwindow = cpu_to_le16(0); |
| 711 | |
| 712 | /* set capability info */ |
| 713 | tmpcap = WLAN_CAPABILITY_IBSS; |
| 714 | if (assoc_req->secinfo.wep_enabled || |
| 715 | assoc_req->secinfo.WPAenabled || |
| 716 | assoc_req->secinfo.WPA2enabled) { |
| 717 | lbs_deb_join("ADHOC_START: WEP/WPA enabled, privacy on\n"); |
| 718 | tmpcap |= WLAN_CAPABILITY_PRIVACY; |
| 719 | } else |
| 720 | lbs_deb_join("ADHOC_START: WEP disabled, privacy off\n"); |
| 721 | |
| 722 | cmd.capability = cpu_to_le16(tmpcap); |
| 723 | |
| 724 | /* Only v8 and below support setting probe delay */ |
| 725 | if (priv->fwrelease < 0x09000000) |
| 726 | cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME); |
| 727 | |
| 728 | ratesize = min(sizeof(cmd.rates), sizeof(lbs_bg_rates)); |
| 729 | memcpy(cmd.rates, lbs_bg_rates, ratesize); |
| 730 | |
| 731 | /* Copy the ad-hoc creating rates into Current BSS state structure */ |
| 732 | memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates)); |
| 733 | memcpy(&priv->curbssparams.rates, &cmd.rates, ratesize); |
| 734 | |
| 735 | /* Set MSB on basic rates as the firmware requires, but _after_ |
| 736 | * copying to current bss rates. |
| 737 | */ |
| 738 | lbs_set_basic_rate_flags(cmd.rates, ratesize); |
| 739 | |
| 740 | lbs_deb_join("ADHOC_START: rates=%02x %02x %02x %02x\n", |
| 741 | cmd.rates[0], cmd.rates[1], cmd.rates[2], cmd.rates[3]); |
| 742 | |
| 743 | if (lbs_create_dnld_countryinfo_11d(priv)) { |
| 744 | lbs_deb_join("ADHOC_START: dnld_countryinfo_11d failed\n"); |
| 745 | ret = -1; |
| 746 | goto out; |
| 747 | } |
| 748 | |
| 749 | lbs_deb_join("ADHOC_START: Starting Ad-Hoc BSS on channel %d, band %d\n", |
| 750 | assoc_req->channel, assoc_req->band); |
| 751 | |
| 752 | priv->adhoccreate = 1; |
| 753 | priv->mode = IW_MODE_ADHOC; |
| 754 | |
| 755 | ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_START, &cmd); |
| 756 | if (ret == 0) |
| 757 | ret = lbs_adhoc_post(priv, |
| 758 | (struct cmd_ds_802_11_ad_hoc_result *)&cmd); |
| 759 | |
| 760 | out: |
| 761 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 762 | return ret; |
| 763 | } |
| 764 | |
| 765 | /** |
| 766 | * @brief Stop and Ad-Hoc network and exit Ad-Hoc mode |
| 767 | * |
| 768 | * @param priv A pointer to struct lbs_private structure |
| 769 | * @return 0 on success, or an error |
| 770 | */ |
| 771 | int lbs_adhoc_stop(struct lbs_private *priv) |
| 772 | { |
| 773 | struct cmd_ds_802_11_ad_hoc_stop cmd; |
| 774 | int ret; |
| 775 | |
| 776 | lbs_deb_enter(LBS_DEB_JOIN); |
| 777 | |
| 778 | memset(&cmd, 0, sizeof (cmd)); |
| 779 | cmd.hdr.size = cpu_to_le16 (sizeof (cmd)); |
| 780 | |
| 781 | ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_STOP, &cmd); |
| 782 | |
| 783 | /* Clean up everything even if there was an error */ |
| 784 | lbs_mac_event_disconnected(priv); |
| 785 | |
| 786 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 787 | return ret; |
| 788 | } |
| 789 | |
| 790 | static inline int match_bss_no_security(struct lbs_802_11_security *secinfo, |
| 791 | struct bss_descriptor *match_bss) |
| 792 | { |
| 793 | if (!secinfo->wep_enabled && !secinfo->WPAenabled |
| 794 | && !secinfo->WPA2enabled |
| 795 | && match_bss->wpa_ie[0] != WLAN_EID_GENERIC |
| 796 | && match_bss->rsn_ie[0] != WLAN_EID_RSN |
| 797 | && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) |
| 798 | return 1; |
| 799 | else |
| 800 | return 0; |
| 801 | } |
| 802 | |
| 803 | static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo, |
| 804 | struct bss_descriptor *match_bss) |
| 805 | { |
| 806 | if (secinfo->wep_enabled && !secinfo->WPAenabled |
| 807 | && !secinfo->WPA2enabled |
| 808 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) |
| 809 | return 1; |
| 810 | else |
| 811 | return 0; |
| 812 | } |
| 813 | |
| 814 | static inline int match_bss_wpa(struct lbs_802_11_security *secinfo, |
| 815 | struct bss_descriptor *match_bss) |
| 816 | { |
| 817 | if (!secinfo->wep_enabled && secinfo->WPAenabled |
| 818 | && (match_bss->wpa_ie[0] == WLAN_EID_GENERIC) |
| 819 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G |
| 820 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */ |
| 821 | ) |
| 822 | return 1; |
| 823 | else |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo, |
| 828 | struct bss_descriptor *match_bss) |
| 829 | { |
| 830 | if (!secinfo->wep_enabled && secinfo->WPA2enabled && |
| 831 | (match_bss->rsn_ie[0] == WLAN_EID_RSN) |
| 832 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G |
| 833 | (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */ |
| 834 | ) |
| 835 | return 1; |
| 836 | else |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo, |
| 841 | struct bss_descriptor *match_bss) |
| 842 | { |
| 843 | if (!secinfo->wep_enabled && !secinfo->WPAenabled |
| 844 | && !secinfo->WPA2enabled |
| 845 | && (match_bss->wpa_ie[0] != WLAN_EID_GENERIC) |
| 846 | && (match_bss->rsn_ie[0] != WLAN_EID_RSN) |
| 847 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) |
| 848 | return 1; |
| 849 | else |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | /** |
| 854 | * @brief Check if a scanned network compatible with the driver settings |
| 855 | * |
| 856 | * WEP WPA WPA2 ad-hoc encrypt Network |
| 857 | * enabled enabled enabled AES mode privacy WPA WPA2 Compatible |
| 858 | * 0 0 0 0 NONE 0 0 0 yes No security |
| 859 | * 1 0 0 0 NONE 1 0 0 yes Static WEP |
| 860 | * 0 1 0 0 x 1x 1 x yes WPA |
| 861 | * 0 0 1 0 x 1x x 1 yes WPA2 |
| 862 | * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES |
| 863 | * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP |
| 864 | * |
| 865 | * |
| 866 | * @param priv A pointer to struct lbs_private |
| 867 | * @param index Index in scantable to check against current driver settings |
| 868 | * @param mode Network mode: Infrastructure or IBSS |
| 869 | * |
| 870 | * @return Index in scantable, or error code if negative |
| 871 | */ |
| 872 | static int is_network_compatible(struct lbs_private *priv, |
| 873 | struct bss_descriptor *bss, uint8_t mode) |
| 874 | { |
| 875 | int matched = 0; |
| 876 | |
| 877 | lbs_deb_enter(LBS_DEB_SCAN); |
| 878 | |
| 879 | if (bss->mode != mode) |
| 880 | goto done; |
| 881 | |
| 882 | matched = match_bss_no_security(&priv->secinfo, bss); |
| 883 | if (matched) |
| 884 | goto done; |
| 885 | matched = match_bss_static_wep(&priv->secinfo, bss); |
| 886 | if (matched) |
| 887 | goto done; |
| 888 | matched = match_bss_wpa(&priv->secinfo, bss); |
| 889 | if (matched) { |
| 890 | lbs_deb_scan("is_network_compatible() WPA: wpa_ie 0x%x " |
| 891 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " |
| 892 | "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], |
| 893 | priv->secinfo.wep_enabled ? "e" : "d", |
| 894 | priv->secinfo.WPAenabled ? "e" : "d", |
| 895 | priv->secinfo.WPA2enabled ? "e" : "d", |
| 896 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
| 897 | goto done; |
| 898 | } |
| 899 | matched = match_bss_wpa2(&priv->secinfo, bss); |
| 900 | if (matched) { |
| 901 | lbs_deb_scan("is_network_compatible() WPA2: wpa_ie 0x%x " |
| 902 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " |
| 903 | "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], |
| 904 | priv->secinfo.wep_enabled ? "e" : "d", |
| 905 | priv->secinfo.WPAenabled ? "e" : "d", |
| 906 | priv->secinfo.WPA2enabled ? "e" : "d", |
| 907 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
| 908 | goto done; |
| 909 | } |
| 910 | matched = match_bss_dynamic_wep(&priv->secinfo, bss); |
| 911 | if (matched) { |
| 912 | lbs_deb_scan("is_network_compatible() dynamic WEP: " |
| 913 | "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n", |
| 914 | bss->wpa_ie[0], bss->rsn_ie[0], |
| 915 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
| 916 | goto done; |
| 917 | } |
| 918 | |
| 919 | /* bss security settings don't match those configured on card */ |
| 920 | lbs_deb_scan("is_network_compatible() FAILED: wpa_ie 0x%x " |
| 921 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n", |
| 922 | bss->wpa_ie[0], bss->rsn_ie[0], |
| 923 | priv->secinfo.wep_enabled ? "e" : "d", |
| 924 | priv->secinfo.WPAenabled ? "e" : "d", |
| 925 | priv->secinfo.WPA2enabled ? "e" : "d", |
| 926 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
| 927 | |
| 928 | done: |
| 929 | lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched); |
| 930 | return matched; |
| 931 | } |
| 932 | |
| 933 | /** |
| 934 | * @brief This function finds a specific compatible BSSID in the scan list |
| 935 | * |
| 936 | * Used in association code |
| 937 | * |
| 938 | * @param priv A pointer to struct lbs_private |
| 939 | * @param bssid BSSID to find in the scan list |
| 940 | * @param mode Network mode: Infrastructure or IBSS |
| 941 | * |
| 942 | * @return index in BSSID list, or error return code (< 0) |
| 943 | */ |
| 944 | static struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv, |
| 945 | uint8_t *bssid, uint8_t mode) |
| 946 | { |
| 947 | struct bss_descriptor *iter_bss; |
| 948 | struct bss_descriptor *found_bss = NULL; |
| 949 | |
| 950 | lbs_deb_enter(LBS_DEB_SCAN); |
| 951 | |
| 952 | if (!bssid) |
| 953 | goto out; |
| 954 | |
| 955 | lbs_deb_hex(LBS_DEB_SCAN, "looking for", bssid, ETH_ALEN); |
| 956 | |
| 957 | /* Look through the scan table for a compatible match. The loop will |
| 958 | * continue past a matched bssid that is not compatible in case there |
| 959 | * is an AP with multiple SSIDs assigned to the same BSSID |
| 960 | */ |
| 961 | mutex_lock(&priv->lock); |
| 962 | list_for_each_entry(iter_bss, &priv->network_list, list) { |
| 963 | if (compare_ether_addr(iter_bss->bssid, bssid)) |
| 964 | continue; /* bssid doesn't match */ |
| 965 | switch (mode) { |
| 966 | case IW_MODE_INFRA: |
| 967 | case IW_MODE_ADHOC: |
| 968 | if (!is_network_compatible(priv, iter_bss, mode)) |
| 969 | break; |
| 970 | found_bss = iter_bss; |
| 971 | break; |
| 972 | default: |
| 973 | found_bss = iter_bss; |
| 974 | break; |
| 975 | } |
| 976 | } |
| 977 | mutex_unlock(&priv->lock); |
| 978 | |
| 979 | out: |
| 980 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); |
| 981 | return found_bss; |
| 982 | } |
| 983 | |
| 984 | /** |
| 985 | * @brief This function finds ssid in ssid list. |
| 986 | * |
| 987 | * Used in association code |
| 988 | * |
| 989 | * @param priv A pointer to struct lbs_private |
| 990 | * @param ssid SSID to find in the list |
| 991 | * @param bssid BSSID to qualify the SSID selection (if provided) |
| 992 | * @param mode Network mode: Infrastructure or IBSS |
| 993 | * |
| 994 | * @return index in BSSID list |
| 995 | */ |
| 996 | static struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv, |
| 997 | uint8_t *ssid, uint8_t ssid_len, |
| 998 | uint8_t *bssid, uint8_t mode, |
| 999 | int channel) |
| 1000 | { |
| 1001 | u32 bestrssi = 0; |
| 1002 | struct bss_descriptor *iter_bss = NULL; |
| 1003 | struct bss_descriptor *found_bss = NULL; |
| 1004 | struct bss_descriptor *tmp_oldest = NULL; |
| 1005 | |
| 1006 | lbs_deb_enter(LBS_DEB_SCAN); |
| 1007 | |
| 1008 | mutex_lock(&priv->lock); |
| 1009 | |
| 1010 | list_for_each_entry(iter_bss, &priv->network_list, list) { |
| 1011 | if (!tmp_oldest || |
| 1012 | (iter_bss->last_scanned < tmp_oldest->last_scanned)) |
| 1013 | tmp_oldest = iter_bss; |
| 1014 | |
| 1015 | if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len, |
| 1016 | ssid, ssid_len) != 0) |
| 1017 | continue; /* ssid doesn't match */ |
| 1018 | if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0) |
| 1019 | continue; /* bssid doesn't match */ |
| 1020 | if ((channel > 0) && (iter_bss->channel != channel)) |
| 1021 | continue; /* channel doesn't match */ |
| 1022 | |
| 1023 | switch (mode) { |
| 1024 | case IW_MODE_INFRA: |
| 1025 | case IW_MODE_ADHOC: |
| 1026 | if (!is_network_compatible(priv, iter_bss, mode)) |
| 1027 | break; |
| 1028 | |
| 1029 | if (bssid) { |
| 1030 | /* Found requested BSSID */ |
| 1031 | found_bss = iter_bss; |
| 1032 | goto out; |
| 1033 | } |
| 1034 | |
| 1035 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { |
| 1036 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1037 | found_bss = iter_bss; |
| 1038 | } |
| 1039 | break; |
| 1040 | case IW_MODE_AUTO: |
| 1041 | default: |
| 1042 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { |
| 1043 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1044 | found_bss = iter_bss; |
| 1045 | } |
| 1046 | break; |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | out: |
| 1051 | mutex_unlock(&priv->lock); |
| 1052 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); |
| 1053 | return found_bss; |
| 1054 | } |
| 1055 | |
| 1056 | static int assoc_helper_essid(struct lbs_private *priv, |
| 1057 | struct assoc_request * assoc_req) |
| 1058 | { |
| 1059 | int ret = 0; |
| 1060 | struct bss_descriptor * bss; |
| 1061 | int channel = -1; |
| 1062 | DECLARE_SSID_BUF(ssid); |
| 1063 | |
| 1064 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1065 | |
| 1066 | /* FIXME: take channel into account when picking SSIDs if a channel |
| 1067 | * is set. |
| 1068 | */ |
| 1069 | |
| 1070 | if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) |
| 1071 | channel = assoc_req->channel; |
| 1072 | |
| 1073 | lbs_deb_assoc("SSID '%s' requested\n", |
| 1074 | print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len)); |
| 1075 | if (assoc_req->mode == IW_MODE_INFRA) { |
| 1076 | lbs_send_specific_ssid_scan(priv, assoc_req->ssid, |
| 1077 | assoc_req->ssid_len); |
| 1078 | |
| 1079 | bss = lbs_find_ssid_in_list(priv, assoc_req->ssid, |
| 1080 | assoc_req->ssid_len, NULL, IW_MODE_INFRA, channel); |
| 1081 | if (bss != NULL) { |
| 1082 | memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor)); |
| 1083 | ret = lbs_try_associate(priv, assoc_req); |
| 1084 | } else { |
| 1085 | lbs_deb_assoc("SSID not found; cannot associate\n"); |
| 1086 | } |
| 1087 | } else if (assoc_req->mode == IW_MODE_ADHOC) { |
| 1088 | /* Scan for the network, do not save previous results. Stale |
| 1089 | * scan data will cause us to join a non-existant adhoc network |
| 1090 | */ |
| 1091 | lbs_send_specific_ssid_scan(priv, assoc_req->ssid, |
| 1092 | assoc_req->ssid_len); |
| 1093 | |
| 1094 | /* Search for the requested SSID in the scan table */ |
| 1095 | bss = lbs_find_ssid_in_list(priv, assoc_req->ssid, |
| 1096 | assoc_req->ssid_len, NULL, IW_MODE_ADHOC, channel); |
| 1097 | if (bss != NULL) { |
| 1098 | lbs_deb_assoc("SSID found, will join\n"); |
| 1099 | memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor)); |
| 1100 | lbs_adhoc_join(priv, assoc_req); |
| 1101 | } else { |
| 1102 | /* else send START command */ |
| 1103 | lbs_deb_assoc("SSID not found, creating adhoc network\n"); |
| 1104 | memcpy(&assoc_req->bss.ssid, &assoc_req->ssid, |
| 1105 | IW_ESSID_MAX_SIZE); |
| 1106 | assoc_req->bss.ssid_len = assoc_req->ssid_len; |
| 1107 | lbs_adhoc_start(priv, assoc_req); |
| 1108 | } |
| 1109 | } |
| 1110 | |
| 1111 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1112 | return ret; |
| 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | static int assoc_helper_bssid(struct lbs_private *priv, |
| 1117 | struct assoc_request * assoc_req) |
| 1118 | { |
| 1119 | int ret = 0; |
| 1120 | struct bss_descriptor * bss; |
| 1121 | |
| 1122 | lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID %pM", assoc_req->bssid); |
| 1123 | |
| 1124 | /* Search for index position in list for requested MAC */ |
| 1125 | bss = lbs_find_bssid_in_list(priv, assoc_req->bssid, |
| 1126 | assoc_req->mode); |
| 1127 | if (bss == NULL) { |
| 1128 | lbs_deb_assoc("ASSOC: WAP: BSSID %pM not found, " |
| 1129 | "cannot associate.\n", assoc_req->bssid); |
| 1130 | goto out; |
| 1131 | } |
| 1132 | |
| 1133 | memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor)); |
| 1134 | if (assoc_req->mode == IW_MODE_INFRA) { |
| 1135 | ret = lbs_try_associate(priv, assoc_req); |
| 1136 | lbs_deb_assoc("ASSOC: lbs_try_associate(bssid) returned %d\n", |
| 1137 | ret); |
| 1138 | } else if (assoc_req->mode == IW_MODE_ADHOC) { |
| 1139 | lbs_adhoc_join(priv, assoc_req); |
| 1140 | } |
| 1141 | |
| 1142 | out: |
| 1143 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1144 | return ret; |
| 1145 | } |
| 1146 | |
| 1147 | |
| 1148 | static int assoc_helper_associate(struct lbs_private *priv, |
| 1149 | struct assoc_request * assoc_req) |
| 1150 | { |
| 1151 | int ret = 0, done = 0; |
| 1152 | |
| 1153 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1154 | |
| 1155 | /* If we're given and 'any' BSSID, try associating based on SSID */ |
| 1156 | |
| 1157 | if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { |
| 1158 | if (compare_ether_addr(bssid_any, assoc_req->bssid) |
| 1159 | && compare_ether_addr(bssid_off, assoc_req->bssid)) { |
| 1160 | ret = assoc_helper_bssid(priv, assoc_req); |
| 1161 | done = 1; |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { |
| 1166 | ret = assoc_helper_essid(priv, assoc_req); |
| 1167 | } |
| 1168 | |
| 1169 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1170 | return ret; |
| 1171 | } |
| 1172 | |
| 1173 | |
| 1174 | static int assoc_helper_mode(struct lbs_private *priv, |
| 1175 | struct assoc_request * assoc_req) |
| 1176 | { |
| 1177 | int ret = 0; |
| 1178 | |
| 1179 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1180 | |
| 1181 | if (assoc_req->mode == priv->mode) |
| 1182 | goto done; |
| 1183 | |
| 1184 | if (assoc_req->mode == IW_MODE_INFRA) { |
| 1185 | if (priv->psstate != PS_STATE_FULL_POWER) |
| 1186 | lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP); |
| 1187 | priv->psmode = LBS802_11POWERMODECAM; |
| 1188 | } |
| 1189 | |
| 1190 | priv->mode = assoc_req->mode; |
| 1191 | ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, assoc_req->mode); |
| 1192 | |
| 1193 | done: |
| 1194 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1195 | return ret; |
| 1196 | } |
| 1197 | |
| 1198 | static int assoc_helper_channel(struct lbs_private *priv, |
| 1199 | struct assoc_request * assoc_req) |
| 1200 | { |
| 1201 | int ret = 0; |
| 1202 | |
| 1203 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1204 | |
| 1205 | ret = lbs_update_channel(priv); |
| 1206 | if (ret) { |
| 1207 | lbs_deb_assoc("ASSOC: channel: error getting channel.\n"); |
| 1208 | goto done; |
| 1209 | } |
| 1210 | |
| 1211 | if (assoc_req->channel == priv->curbssparams.channel) |
| 1212 | goto done; |
| 1213 | |
| 1214 | if (priv->mesh_dev) { |
| 1215 | /* Change mesh channel first; 21.p21 firmware won't let |
| 1216 | you change channel otherwise (even though it'll return |
| 1217 | an error to this */ |
| 1218 | lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP, |
| 1219 | assoc_req->channel); |
| 1220 | } |
| 1221 | |
| 1222 | lbs_deb_assoc("ASSOC: channel: %d -> %d\n", |
| 1223 | priv->curbssparams.channel, assoc_req->channel); |
| 1224 | |
| 1225 | ret = lbs_set_channel(priv, assoc_req->channel); |
| 1226 | if (ret < 0) |
| 1227 | lbs_deb_assoc("ASSOC: channel: error setting channel.\n"); |
| 1228 | |
| 1229 | /* FIXME: shouldn't need to grab the channel _again_ after setting |
| 1230 | * it since the firmware is supposed to return the new channel, but |
| 1231 | * whatever... */ |
| 1232 | ret = lbs_update_channel(priv); |
| 1233 | if (ret) { |
| 1234 | lbs_deb_assoc("ASSOC: channel: error getting channel.\n"); |
| 1235 | goto done; |
| 1236 | } |
| 1237 | |
| 1238 | if (assoc_req->channel != priv->curbssparams.channel) { |
| 1239 | lbs_deb_assoc("ASSOC: channel: failed to update channel to %d\n", |
| 1240 | assoc_req->channel); |
| 1241 | goto restore_mesh; |
| 1242 | } |
| 1243 | |
| 1244 | if ( assoc_req->secinfo.wep_enabled |
| 1245 | && (assoc_req->wep_keys[0].len |
| 1246 | || assoc_req->wep_keys[1].len |
| 1247 | || assoc_req->wep_keys[2].len |
| 1248 | || assoc_req->wep_keys[3].len)) { |
| 1249 | /* Make sure WEP keys are re-sent to firmware */ |
| 1250 | set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags); |
| 1251 | } |
| 1252 | |
| 1253 | /* Must restart/rejoin adhoc networks after channel change */ |
| 1254 | set_bit(ASSOC_FLAG_SSID, &assoc_req->flags); |
| 1255 | |
| 1256 | restore_mesh: |
| 1257 | if (priv->mesh_dev) |
| 1258 | lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START, |
| 1259 | priv->curbssparams.channel); |
| 1260 | |
| 1261 | done: |
| 1262 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1263 | return ret; |
| 1264 | } |
| 1265 | |
| 1266 | |
| 1267 | static int assoc_helper_wep_keys(struct lbs_private *priv, |
| 1268 | struct assoc_request *assoc_req) |
| 1269 | { |
| 1270 | int i; |
| 1271 | int ret = 0; |
| 1272 | |
| 1273 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1274 | |
| 1275 | /* Set or remove WEP keys */ |
| 1276 | if (assoc_req->wep_keys[0].len || assoc_req->wep_keys[1].len || |
| 1277 | assoc_req->wep_keys[2].len || assoc_req->wep_keys[3].len) |
| 1278 | ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_ADD, assoc_req); |
| 1279 | else |
| 1280 | ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_REMOVE, assoc_req); |
| 1281 | |
| 1282 | if (ret) |
| 1283 | goto out; |
| 1284 | |
| 1285 | /* enable/disable the MAC's WEP packet filter */ |
| 1286 | if (assoc_req->secinfo.wep_enabled) |
| 1287 | priv->mac_control |= CMD_ACT_MAC_WEP_ENABLE; |
| 1288 | else |
| 1289 | priv->mac_control &= ~CMD_ACT_MAC_WEP_ENABLE; |
| 1290 | |
| 1291 | lbs_set_mac_control(priv); |
| 1292 | |
| 1293 | mutex_lock(&priv->lock); |
| 1294 | |
| 1295 | /* Copy WEP keys into priv wep key fields */ |
| 1296 | for (i = 0; i < 4; i++) { |
| 1297 | memcpy(&priv->wep_keys[i], &assoc_req->wep_keys[i], |
| 1298 | sizeof(struct enc_key)); |
| 1299 | } |
| 1300 | priv->wep_tx_keyidx = assoc_req->wep_tx_keyidx; |
| 1301 | |
| 1302 | mutex_unlock(&priv->lock); |
| 1303 | |
| 1304 | out: |
| 1305 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1306 | return ret; |
| 1307 | } |
| 1308 | |
| 1309 | static int assoc_helper_secinfo(struct lbs_private *priv, |
| 1310 | struct assoc_request * assoc_req) |
| 1311 | { |
| 1312 | int ret = 0; |
| 1313 | uint16_t do_wpa; |
| 1314 | uint16_t rsn = 0; |
| 1315 | |
| 1316 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1317 | |
| 1318 | memcpy(&priv->secinfo, &assoc_req->secinfo, |
| 1319 | sizeof(struct lbs_802_11_security)); |
| 1320 | |
| 1321 | lbs_set_mac_control(priv); |
| 1322 | |
| 1323 | /* If RSN is already enabled, don't try to enable it again, since |
| 1324 | * ENABLE_RSN resets internal state machines and will clobber the |
| 1325 | * 4-way WPA handshake. |
| 1326 | */ |
| 1327 | |
| 1328 | /* Get RSN enabled/disabled */ |
| 1329 | ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_GET, &rsn); |
| 1330 | if (ret) { |
| 1331 | lbs_deb_assoc("Failed to get RSN status: %d\n", ret); |
| 1332 | goto out; |
| 1333 | } |
| 1334 | |
| 1335 | /* Don't re-enable RSN if it's already enabled */ |
| 1336 | do_wpa = assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled; |
| 1337 | if (do_wpa == rsn) |
| 1338 | goto out; |
| 1339 | |
| 1340 | /* Set RSN enabled/disabled */ |
| 1341 | ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_SET, &do_wpa); |
| 1342 | |
| 1343 | out: |
| 1344 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1345 | return ret; |
| 1346 | } |
| 1347 | |
| 1348 | |
| 1349 | static int assoc_helper_wpa_keys(struct lbs_private *priv, |
| 1350 | struct assoc_request * assoc_req) |
| 1351 | { |
| 1352 | int ret = 0; |
| 1353 | unsigned int flags = assoc_req->flags; |
| 1354 | |
| 1355 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1356 | |
| 1357 | /* Work around older firmware bug where WPA unicast and multicast |
| 1358 | * keys must be set independently. Seen in SDIO parts with firmware |
| 1359 | * version 5.0.11p0. |
| 1360 | */ |
| 1361 | |
| 1362 | if (test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) { |
| 1363 | clear_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags); |
| 1364 | ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req); |
| 1365 | assoc_req->flags = flags; |
| 1366 | } |
| 1367 | |
| 1368 | if (ret) |
| 1369 | goto out; |
| 1370 | |
| 1371 | if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) { |
| 1372 | clear_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags); |
| 1373 | |
| 1374 | ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req); |
| 1375 | assoc_req->flags = flags; |
| 1376 | } |
| 1377 | |
| 1378 | out: |
| 1379 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1380 | return ret; |
| 1381 | } |
| 1382 | |
| 1383 | |
| 1384 | static int assoc_helper_wpa_ie(struct lbs_private *priv, |
| 1385 | struct assoc_request * assoc_req) |
| 1386 | { |
| 1387 | int ret = 0; |
| 1388 | |
| 1389 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1390 | |
| 1391 | if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) { |
| 1392 | memcpy(&priv->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len); |
| 1393 | priv->wpa_ie_len = assoc_req->wpa_ie_len; |
| 1394 | } else { |
| 1395 | memset(&priv->wpa_ie, 0, MAX_WPA_IE_LEN); |
| 1396 | priv->wpa_ie_len = 0; |
| 1397 | } |
| 1398 | |
| 1399 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1400 | return ret; |
| 1401 | } |
| 1402 | |
| 1403 | |
| 1404 | static int should_deauth_infrastructure(struct lbs_private *priv, |
| 1405 | struct assoc_request * assoc_req) |
| 1406 | { |
| 1407 | int ret = 0; |
| 1408 | |
| 1409 | if (priv->connect_status != LBS_CONNECTED) |
| 1410 | return 0; |
| 1411 | |
| 1412 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1413 | if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { |
| 1414 | lbs_deb_assoc("Deauthenticating due to new SSID\n"); |
| 1415 | ret = 1; |
| 1416 | goto out; |
| 1417 | } |
| 1418 | |
| 1419 | if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) { |
| 1420 | if (priv->secinfo.auth_mode != assoc_req->secinfo.auth_mode) { |
| 1421 | lbs_deb_assoc("Deauthenticating due to new security\n"); |
| 1422 | ret = 1; |
| 1423 | goto out; |
| 1424 | } |
| 1425 | } |
| 1426 | |
| 1427 | if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { |
| 1428 | lbs_deb_assoc("Deauthenticating due to new BSSID\n"); |
| 1429 | ret = 1; |
| 1430 | goto out; |
| 1431 | } |
| 1432 | |
| 1433 | if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) { |
| 1434 | lbs_deb_assoc("Deauthenticating due to channel switch\n"); |
| 1435 | ret = 1; |
| 1436 | goto out; |
| 1437 | } |
| 1438 | |
| 1439 | /* FIXME: deal with 'auto' mode somehow */ |
| 1440 | if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) { |
| 1441 | if (assoc_req->mode != IW_MODE_INFRA) { |
| 1442 | lbs_deb_assoc("Deauthenticating due to leaving " |
| 1443 | "infra mode\n"); |
| 1444 | ret = 1; |
| 1445 | goto out; |
| 1446 | } |
| 1447 | } |
| 1448 | |
| 1449 | out: |
| 1450 | lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret); |
| 1451 | return ret; |
| 1452 | } |
| 1453 | |
| 1454 | |
| 1455 | static int should_stop_adhoc(struct lbs_private *priv, |
| 1456 | struct assoc_request * assoc_req) |
| 1457 | { |
| 1458 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1459 | |
| 1460 | if (priv->connect_status != LBS_CONNECTED) |
| 1461 | return 0; |
| 1462 | |
| 1463 | if (lbs_ssid_cmp(priv->curbssparams.ssid, |
| 1464 | priv->curbssparams.ssid_len, |
| 1465 | assoc_req->ssid, assoc_req->ssid_len) != 0) |
| 1466 | return 1; |
| 1467 | |
| 1468 | /* FIXME: deal with 'auto' mode somehow */ |
| 1469 | if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) { |
| 1470 | if (assoc_req->mode != IW_MODE_ADHOC) |
| 1471 | return 1; |
| 1472 | } |
| 1473 | |
| 1474 | if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) { |
| 1475 | if (assoc_req->channel != priv->curbssparams.channel) |
| 1476 | return 1; |
| 1477 | } |
| 1478 | |
| 1479 | lbs_deb_leave(LBS_DEB_ASSOC); |
| 1480 | return 0; |
| 1481 | } |
| 1482 | |
| 1483 | |
| 1484 | /** |
| 1485 | * @brief This function finds the best SSID in the Scan List |
| 1486 | * |
| 1487 | * Search the scan table for the best SSID that also matches the current |
| 1488 | * adapter network preference (infrastructure or adhoc) |
| 1489 | * |
| 1490 | * @param priv A pointer to struct lbs_private |
| 1491 | * |
| 1492 | * @return index in BSSID list |
| 1493 | */ |
| 1494 | static struct bss_descriptor *lbs_find_best_ssid_in_list( |
| 1495 | struct lbs_private *priv, uint8_t mode) |
| 1496 | { |
| 1497 | uint8_t bestrssi = 0; |
| 1498 | struct bss_descriptor *iter_bss; |
| 1499 | struct bss_descriptor *best_bss = NULL; |
| 1500 | |
| 1501 | lbs_deb_enter(LBS_DEB_SCAN); |
| 1502 | |
| 1503 | mutex_lock(&priv->lock); |
| 1504 | |
| 1505 | list_for_each_entry(iter_bss, &priv->network_list, list) { |
| 1506 | switch (mode) { |
| 1507 | case IW_MODE_INFRA: |
| 1508 | case IW_MODE_ADHOC: |
| 1509 | if (!is_network_compatible(priv, iter_bss, mode)) |
| 1510 | break; |
| 1511 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) |
| 1512 | break; |
| 1513 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1514 | best_bss = iter_bss; |
| 1515 | break; |
| 1516 | case IW_MODE_AUTO: |
| 1517 | default: |
| 1518 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) |
| 1519 | break; |
| 1520 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1521 | best_bss = iter_bss; |
| 1522 | break; |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | mutex_unlock(&priv->lock); |
| 1527 | lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss); |
| 1528 | return best_bss; |
| 1529 | } |
| 1530 | |
| 1531 | /** |
| 1532 | * @brief Find the best AP |
| 1533 | * |
| 1534 | * Used from association worker. |
| 1535 | * |
| 1536 | * @param priv A pointer to struct lbs_private structure |
| 1537 | * @param pSSID A pointer to AP's ssid |
| 1538 | * |
| 1539 | * @return 0--success, otherwise--fail |
| 1540 | */ |
| 1541 | static int lbs_find_best_network_ssid(struct lbs_private *priv, |
| 1542 | uint8_t *out_ssid, uint8_t *out_ssid_len, uint8_t preferred_mode, |
| 1543 | uint8_t *out_mode) |
| 1544 | { |
| 1545 | int ret = -1; |
| 1546 | struct bss_descriptor *found; |
| 1547 | |
| 1548 | lbs_deb_enter(LBS_DEB_SCAN); |
| 1549 | |
| 1550 | priv->scan_ssid_len = 0; |
| 1551 | lbs_scan_networks(priv, 1); |
| 1552 | if (priv->surpriseremoved) |
| 1553 | goto out; |
| 1554 | |
| 1555 | found = lbs_find_best_ssid_in_list(priv, preferred_mode); |
| 1556 | if (found && (found->ssid_len > 0)) { |
| 1557 | memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE); |
| 1558 | *out_ssid_len = found->ssid_len; |
| 1559 | *out_mode = found->mode; |
| 1560 | ret = 0; |
| 1561 | } |
| 1562 | |
| 1563 | out: |
| 1564 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
| 1565 | return ret; |
| 1566 | } |
| 1567 | |
| 1568 | |
| 1569 | void lbs_association_worker(struct work_struct *work) |
| 1570 | { |
| 1571 | struct lbs_private *priv = container_of(work, struct lbs_private, |
| 1572 | assoc_work.work); |
| 1573 | struct assoc_request * assoc_req = NULL; |
| 1574 | int ret = 0; |
| 1575 | int find_any_ssid = 0; |
| 1576 | DECLARE_SSID_BUF(ssid); |
| 1577 | |
| 1578 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1579 | |
| 1580 | mutex_lock(&priv->lock); |
| 1581 | assoc_req = priv->pending_assoc_req; |
| 1582 | priv->pending_assoc_req = NULL; |
| 1583 | priv->in_progress_assoc_req = assoc_req; |
| 1584 | mutex_unlock(&priv->lock); |
| 1585 | |
| 1586 | if (!assoc_req) |
| 1587 | goto done; |
| 1588 | |
| 1589 | lbs_deb_assoc( |
| 1590 | "Association Request:\n" |
| 1591 | " flags: 0x%08lx\n" |
| 1592 | " SSID: '%s'\n" |
| 1593 | " chann: %d\n" |
| 1594 | " band: %d\n" |
| 1595 | " mode: %d\n" |
| 1596 | " BSSID: %pM\n" |
| 1597 | " secinfo: %s%s%s\n" |
| 1598 | " auth_mode: %d\n", |
| 1599 | assoc_req->flags, |
| 1600 | print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len), |
| 1601 | assoc_req->channel, assoc_req->band, assoc_req->mode, |
| 1602 | assoc_req->bssid, |
| 1603 | assoc_req->secinfo.WPAenabled ? " WPA" : "", |
| 1604 | assoc_req->secinfo.WPA2enabled ? " WPA2" : "", |
| 1605 | assoc_req->secinfo.wep_enabled ? " WEP" : "", |
| 1606 | assoc_req->secinfo.auth_mode); |
| 1607 | |
| 1608 | /* If 'any' SSID was specified, find an SSID to associate with */ |
| 1609 | if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags) |
| 1610 | && !assoc_req->ssid_len) |
| 1611 | find_any_ssid = 1; |
| 1612 | |
| 1613 | /* But don't use 'any' SSID if there's a valid locked BSSID to use */ |
| 1614 | if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { |
| 1615 | if (compare_ether_addr(assoc_req->bssid, bssid_any) |
| 1616 | && compare_ether_addr(assoc_req->bssid, bssid_off)) |
| 1617 | find_any_ssid = 0; |
| 1618 | } |
| 1619 | |
| 1620 | if (find_any_ssid) { |
| 1621 | u8 new_mode = assoc_req->mode; |
| 1622 | |
| 1623 | ret = lbs_find_best_network_ssid(priv, assoc_req->ssid, |
| 1624 | &assoc_req->ssid_len, assoc_req->mode, &new_mode); |
| 1625 | if (ret) { |
| 1626 | lbs_deb_assoc("Could not find best network\n"); |
| 1627 | ret = -ENETUNREACH; |
| 1628 | goto out; |
| 1629 | } |
| 1630 | |
| 1631 | /* Ensure we switch to the mode of the AP */ |
| 1632 | if (assoc_req->mode == IW_MODE_AUTO) { |
| 1633 | set_bit(ASSOC_FLAG_MODE, &assoc_req->flags); |
| 1634 | assoc_req->mode = new_mode; |
| 1635 | } |
| 1636 | } |
| 1637 | |
| 1638 | /* |
| 1639 | * Check if the attributes being changing require deauthentication |
| 1640 | * from the currently associated infrastructure access point. |
| 1641 | */ |
| 1642 | if (priv->mode == IW_MODE_INFRA) { |
| 1643 | if (should_deauth_infrastructure(priv, assoc_req)) { |
| 1644 | ret = lbs_cmd_80211_deauthenticate(priv, |
| 1645 | priv->curbssparams.bssid, |
| 1646 | WLAN_REASON_DEAUTH_LEAVING); |
| 1647 | if (ret) { |
| 1648 | lbs_deb_assoc("Deauthentication due to new " |
| 1649 | "configuration request failed: %d\n", |
| 1650 | ret); |
| 1651 | } |
| 1652 | } |
| 1653 | } else if (priv->mode == IW_MODE_ADHOC) { |
| 1654 | if (should_stop_adhoc(priv, assoc_req)) { |
| 1655 | ret = lbs_adhoc_stop(priv); |
| 1656 | if (ret) { |
| 1657 | lbs_deb_assoc("Teardown of AdHoc network due to " |
| 1658 | "new configuration request failed: %d\n", |
| 1659 | ret); |
| 1660 | } |
| 1661 | |
| 1662 | } |
| 1663 | } |
| 1664 | |
| 1665 | /* Send the various configuration bits to the firmware */ |
| 1666 | if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) { |
| 1667 | ret = assoc_helper_mode(priv, assoc_req); |
| 1668 | if (ret) |
| 1669 | goto out; |
| 1670 | } |
| 1671 | |
| 1672 | if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) { |
| 1673 | ret = assoc_helper_channel(priv, assoc_req); |
| 1674 | if (ret) |
| 1675 | goto out; |
| 1676 | } |
| 1677 | |
| 1678 | if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags) |
| 1679 | || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) { |
| 1680 | ret = assoc_helper_wep_keys(priv, assoc_req); |
| 1681 | if (ret) |
| 1682 | goto out; |
| 1683 | } |
| 1684 | |
| 1685 | if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) { |
| 1686 | ret = assoc_helper_secinfo(priv, assoc_req); |
| 1687 | if (ret) |
| 1688 | goto out; |
| 1689 | } |
| 1690 | |
| 1691 | if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) { |
| 1692 | ret = assoc_helper_wpa_ie(priv, assoc_req); |
| 1693 | if (ret) |
| 1694 | goto out; |
| 1695 | } |
| 1696 | |
| 1697 | if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags) |
| 1698 | || test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) { |
| 1699 | ret = assoc_helper_wpa_keys(priv, assoc_req); |
| 1700 | if (ret) |
| 1701 | goto out; |
| 1702 | } |
| 1703 | |
| 1704 | /* SSID/BSSID should be the _last_ config option set, because they |
| 1705 | * trigger the association attempt. |
| 1706 | */ |
| 1707 | if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags) |
| 1708 | || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { |
| 1709 | int success = 1; |
| 1710 | |
| 1711 | ret = assoc_helper_associate(priv, assoc_req); |
| 1712 | if (ret) { |
| 1713 | lbs_deb_assoc("ASSOC: association unsuccessful: %d\n", |
| 1714 | ret); |
| 1715 | success = 0; |
| 1716 | } |
| 1717 | |
| 1718 | if (priv->connect_status != LBS_CONNECTED) { |
| 1719 | lbs_deb_assoc("ASSOC: association unsuccessful, " |
| 1720 | "not connected\n"); |
| 1721 | success = 0; |
| 1722 | } |
| 1723 | |
| 1724 | if (success) { |
| 1725 | lbs_deb_assoc("associated to %pM\n", |
| 1726 | priv->curbssparams.bssid); |
| 1727 | lbs_prepare_and_send_command(priv, |
| 1728 | CMD_802_11_RSSI, |
| 1729 | 0, CMD_OPTION_WAITFORRSP, 0, NULL); |
| 1730 | } else { |
| 1731 | ret = -1; |
| 1732 | } |
| 1733 | } |
| 1734 | |
| 1735 | out: |
| 1736 | if (ret) { |
| 1737 | lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n", |
| 1738 | ret); |
| 1739 | } |
| 1740 | |
| 1741 | mutex_lock(&priv->lock); |
| 1742 | priv->in_progress_assoc_req = NULL; |
| 1743 | mutex_unlock(&priv->lock); |
| 1744 | kfree(assoc_req); |
| 1745 | |
| 1746 | done: |
| 1747 | lbs_deb_leave(LBS_DEB_ASSOC); |
| 1748 | } |
| 1749 | |
| 1750 | |
| 1751 | /* |
| 1752 | * Caller MUST hold any necessary locks |
| 1753 | */ |
| 1754 | struct assoc_request *lbs_get_association_request(struct lbs_private *priv) |
| 1755 | { |
| 1756 | struct assoc_request * assoc_req; |
| 1757 | |
| 1758 | lbs_deb_enter(LBS_DEB_ASSOC); |
| 1759 | if (!priv->pending_assoc_req) { |
| 1760 | priv->pending_assoc_req = kzalloc(sizeof(struct assoc_request), |
| 1761 | GFP_KERNEL); |
| 1762 | if (!priv->pending_assoc_req) { |
| 1763 | lbs_pr_info("Not enough memory to allocate association" |
| 1764 | " request!\n"); |
| 1765 | return NULL; |
| 1766 | } |
| 1767 | } |
| 1768 | |
| 1769 | /* Copy current configuration attributes to the association request, |
| 1770 | * but don't overwrite any that are already set. |
| 1771 | */ |
| 1772 | assoc_req = priv->pending_assoc_req; |
| 1773 | if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) { |
| 1774 | memcpy(&assoc_req->ssid, &priv->curbssparams.ssid, |
| 1775 | IW_ESSID_MAX_SIZE); |
| 1776 | assoc_req->ssid_len = priv->curbssparams.ssid_len; |
| 1777 | } |
| 1778 | |
| 1779 | if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) |
| 1780 | assoc_req->channel = priv->curbssparams.channel; |
| 1781 | |
| 1782 | if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags)) |
| 1783 | assoc_req->band = priv->curbssparams.band; |
| 1784 | |
| 1785 | if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) |
| 1786 | assoc_req->mode = priv->mode; |
| 1787 | |
| 1788 | if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) { |
| 1789 | memcpy(&assoc_req->bssid, priv->curbssparams.bssid, |
| 1790 | ETH_ALEN); |
| 1791 | } |
| 1792 | |
| 1793 | if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) { |
| 1794 | int i; |
| 1795 | for (i = 0; i < 4; i++) { |
| 1796 | memcpy(&assoc_req->wep_keys[i], &priv->wep_keys[i], |
| 1797 | sizeof(struct enc_key)); |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) |
| 1802 | assoc_req->wep_tx_keyidx = priv->wep_tx_keyidx; |
| 1803 | |
| 1804 | if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) { |
| 1805 | memcpy(&assoc_req->wpa_mcast_key, &priv->wpa_mcast_key, |
| 1806 | sizeof(struct enc_key)); |
| 1807 | } |
| 1808 | |
| 1809 | if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) { |
| 1810 | memcpy(&assoc_req->wpa_unicast_key, &priv->wpa_unicast_key, |
| 1811 | sizeof(struct enc_key)); |
| 1812 | } |
| 1813 | |
| 1814 | if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) { |
| 1815 | memcpy(&assoc_req->secinfo, &priv->secinfo, |
| 1816 | sizeof(struct lbs_802_11_security)); |
| 1817 | } |
| 1818 | |
| 1819 | if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) { |
| 1820 | memcpy(&assoc_req->wpa_ie, &priv->wpa_ie, |
| 1821 | MAX_WPA_IE_LEN); |
| 1822 | assoc_req->wpa_ie_len = priv->wpa_ie_len; |
| 1823 | } |
| 1824 | |
| 1825 | lbs_deb_leave(LBS_DEB_ASSOC); |
| 1826 | return assoc_req; |
| 1827 | } |
| 1828 | |
| 1829 | |
| 1830 | /** |
| 1831 | * @brief Deauthenticate from a specific BSS |
| 1832 | * |
| 1833 | * @param priv A pointer to struct lbs_private structure |
| 1834 | * @param bssid The specific BSS to deauthenticate from |
| 1835 | * @param reason The 802.11 sec. 7.3.1.7 Reason Code for deauthenticating |
| 1836 | * |
| 1837 | * @return 0 on success, error on failure |
| 1838 | */ |
| 1839 | int lbs_cmd_80211_deauthenticate(struct lbs_private *priv, u8 bssid[ETH_ALEN], |
| 1840 | u16 reason) |
| 1841 | { |
| 1842 | struct cmd_ds_802_11_deauthenticate cmd; |
| 1843 | int ret; |
| 1844 | |
| 1845 | lbs_deb_enter(LBS_DEB_JOIN); |
| 1846 | |
| 1847 | memset(&cmd, 0, sizeof(cmd)); |
| 1848 | cmd.hdr.size = cpu_to_le16(sizeof(cmd)); |
| 1849 | memcpy(cmd.macaddr, &bssid[0], ETH_ALEN); |
| 1850 | cmd.reasoncode = cpu_to_le16(reason); |
| 1851 | |
| 1852 | ret = lbs_cmd_with_response(priv, CMD_802_11_DEAUTHENTICATE, &cmd); |
| 1853 | |
| 1854 | /* Clean up everything even if there was an error; can't assume that |
| 1855 | * we're still authenticated to the AP after trying to deauth. |
| 1856 | */ |
| 1857 | lbs_mac_event_disconnected(priv); |
| 1858 | |
| 1859 | lbs_deb_leave(LBS_DEB_JOIN); |
| 1860 | return ret; |
| 1861 | } |
| 1862 | |