Bing Zhao | 5e6e3a9 | 2011-03-21 18:00:50 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Marvell Wireless LAN device driver: scan ioctl and command handling |
| 3 | * |
| 4 | * Copyright (C) 2011, Marvell International Ltd. |
| 5 | * |
| 6 | * This software file (the "File") is distributed by Marvell International |
| 7 | * Ltd. under the terms of the GNU General Public License Version 2, June 1991 |
| 8 | * (the "License"). You may use, redistribute and/or modify this File in |
| 9 | * accordance with the terms and conditions of the License, a copy of which |
| 10 | * is available by writing to the Free Software Foundation, Inc., |
| 11 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the |
| 12 | * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. |
| 13 | * |
| 14 | * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE |
| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE |
| 16 | * ARE EXPRESSLY DISCLAIMED. The License provides additional details about |
| 17 | * this warranty disclaimer. |
| 18 | */ |
| 19 | |
| 20 | #include "decl.h" |
| 21 | #include "ioctl.h" |
| 22 | #include "util.h" |
| 23 | #include "fw.h" |
| 24 | #include "main.h" |
| 25 | #include "11n.h" |
| 26 | #include "cfg80211.h" |
| 27 | |
| 28 | /* The maximum number of channels the firmware can scan per command */ |
| 29 | #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14 |
| 30 | |
| 31 | #define MWIFIEX_CHANNELS_PER_SCAN_CMD 4 |
| 32 | |
| 33 | /* Memory needed to store a max sized Channel List TLV for a firmware scan */ |
| 34 | #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \ |
| 35 | + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \ |
| 36 | *sizeof(struct mwifiex_chan_scan_param_set))) |
| 37 | |
| 38 | /* Memory needed to store supported rate */ |
| 39 | #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \ |
| 40 | + HOSTCMD_SUPPORTED_RATES) |
| 41 | |
| 42 | /* Memory needed to store a max number/size WildCard SSID TLV for a firmware |
| 43 | scan */ |
| 44 | #define WILDCARD_SSID_TLV_MAX_SIZE \ |
| 45 | (MWIFIEX_MAX_SSID_LIST_LENGTH * \ |
| 46 | (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \ |
| 47 | + IEEE80211_MAX_SSID_LEN)) |
| 48 | |
| 49 | /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */ |
| 50 | #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \ |
| 51 | + sizeof(struct mwifiex_ie_types_num_probes) \ |
| 52 | + sizeof(struct mwifiex_ie_types_htcap) \ |
| 53 | + CHAN_TLV_MAX_SIZE \ |
| 54 | + RATE_TLV_MAX_SIZE \ |
| 55 | + WILDCARD_SSID_TLV_MAX_SIZE) |
| 56 | |
| 57 | |
| 58 | union mwifiex_scan_cmd_config_tlv { |
| 59 | /* Scan configuration (variable length) */ |
| 60 | struct mwifiex_scan_cmd_config config; |
| 61 | /* Max allocated block */ |
| 62 | u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC]; |
| 63 | }; |
| 64 | |
| 65 | enum cipher_suite { |
| 66 | CIPHER_SUITE_TKIP, |
| 67 | CIPHER_SUITE_CCMP, |
| 68 | CIPHER_SUITE_MAX |
| 69 | }; |
| 70 | static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = { |
| 71 | { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */ |
| 72 | { 0x00, 0x50, 0xf2, 0x04 }, /* AES */ |
| 73 | }; |
| 74 | static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = { |
| 75 | { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */ |
| 76 | { 0x00, 0x0f, 0xac, 0x04 }, /* AES */ |
| 77 | }; |
| 78 | |
| 79 | /* |
| 80 | * This function parses a given IE for a given OUI. |
| 81 | * |
| 82 | * This is used to parse a WPA/RSN IE to find if it has |
| 83 | * a given oui in PTK. |
| 84 | */ |
| 85 | static u8 |
| 86 | mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui) |
| 87 | { |
| 88 | u8 count; |
| 89 | |
| 90 | count = iebody->ptk_cnt[0]; |
| 91 | |
| 92 | /* There could be multiple OUIs for PTK hence |
| 93 | 1) Take the length. |
| 94 | 2) Check all the OUIs for AES. |
| 95 | 3) If one of them is AES then pass success. */ |
| 96 | while (count) { |
| 97 | if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body))) |
| 98 | return MWIFIEX_OUI_PRESENT; |
| 99 | |
| 100 | --count; |
| 101 | if (count) |
| 102 | iebody = (struct ie_body *) ((u8 *) iebody + |
| 103 | sizeof(iebody->ptk_body)); |
| 104 | } |
| 105 | |
| 106 | pr_debug("info: %s: OUI is not found in PTK\n", __func__); |
| 107 | return MWIFIEX_OUI_NOT_PRESENT; |
| 108 | } |
| 109 | |
| 110 | /* |
| 111 | * This function checks if a given OUI is present in a RSN IE. |
| 112 | * |
| 113 | * The function first checks if a RSN IE is present or not in the |
| 114 | * BSS descriptor. It tries to locate the OUI only if such an IE is |
| 115 | * present. |
| 116 | */ |
| 117 | static u8 |
| 118 | mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) |
| 119 | { |
| 120 | u8 *oui = NULL; |
| 121 | struct ie_body *iebody = NULL; |
| 122 | u8 ret = MWIFIEX_OUI_NOT_PRESENT; |
| 123 | |
| 124 | if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)). |
| 125 | ieee_hdr.element_id == WLAN_EID_RSN))) { |
| 126 | iebody = (struct ie_body *) |
| 127 | (((u8 *) bss_desc->bcn_rsn_ie->data) + |
| 128 | RSN_GTK_OUI_OFFSET); |
| 129 | oui = &mwifiex_rsn_oui[cipher][0]; |
| 130 | ret = mwifiex_search_oui_in_ie(iebody, oui); |
| 131 | if (ret) |
| 132 | return ret; |
| 133 | } |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | /* |
| 138 | * This function checks if a given OUI is present in a WPA IE. |
| 139 | * |
| 140 | * The function first checks if a WPA IE is present or not in the |
| 141 | * BSS descriptor. It tries to locate the OUI only if such an IE is |
| 142 | * present. |
| 143 | */ |
| 144 | static u8 |
| 145 | mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) |
| 146 | { |
| 147 | u8 *oui = NULL; |
| 148 | struct ie_body *iebody = NULL; |
| 149 | u8 ret = MWIFIEX_OUI_NOT_PRESENT; |
| 150 | |
| 151 | if (((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)). |
| 152 | vend_hdr.element_id == WLAN_EID_WPA))) { |
| 153 | iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data; |
| 154 | oui = &mwifiex_wpa_oui[cipher][0]; |
| 155 | ret = mwifiex_search_oui_in_ie(iebody, oui); |
| 156 | if (ret) |
| 157 | return ret; |
| 158 | } |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | /* |
| 163 | * This function compares two SSIDs and checks if they match. |
| 164 | */ |
| 165 | s32 |
| 166 | mwifiex_ssid_cmp(struct mwifiex_802_11_ssid *ssid1, |
| 167 | struct mwifiex_802_11_ssid *ssid2) |
| 168 | { |
| 169 | if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len)) |
| 170 | return -1; |
| 171 | return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len); |
| 172 | } |
| 173 | |
| 174 | /* |
| 175 | * Sends IOCTL request to get the best BSS. |
| 176 | * |
| 177 | * This function allocates the IOCTL request buffer, fills it |
| 178 | * with requisite parameters and calls the IOCTL handler. |
| 179 | */ |
| 180 | int mwifiex_find_best_bss(struct mwifiex_private *priv, |
| 181 | u8 wait_option, struct mwifiex_ssid_bssid *ssid_bssid) |
| 182 | { |
| 183 | struct mwifiex_wait_queue *wait = NULL; |
| 184 | struct mwifiex_ssid_bssid tmp_ssid_bssid; |
| 185 | int ret = 0; |
| 186 | u8 *mac = NULL; |
| 187 | |
| 188 | if (!ssid_bssid) |
| 189 | return -1; |
| 190 | |
| 191 | /* Allocate wait request buffer */ |
| 192 | wait = mwifiex_alloc_fill_wait_queue(priv, wait_option); |
| 193 | if (!wait) |
| 194 | return -ENOMEM; |
| 195 | |
| 196 | memcpy(&tmp_ssid_bssid, ssid_bssid, |
| 197 | sizeof(struct mwifiex_ssid_bssid)); |
| 198 | ret = mwifiex_bss_ioctl_find_bss(priv, wait, &tmp_ssid_bssid); |
| 199 | |
| 200 | if (!ret) { |
| 201 | memcpy(ssid_bssid, &tmp_ssid_bssid, |
| 202 | sizeof(struct mwifiex_ssid_bssid)); |
| 203 | mac = (u8 *) &ssid_bssid->bssid; |
| 204 | dev_dbg(priv->adapter->dev, "cmd: found network: ssid=%s," |
| 205 | " %pM\n", ssid_bssid->ssid.ssid, mac); |
| 206 | } |
| 207 | |
| 208 | kfree(wait); |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Sends IOCTL request to start a scan with user configurations. |
| 214 | * |
| 215 | * This function allocates the IOCTL request buffer, fills it |
| 216 | * with requisite parameters and calls the IOCTL handler. |
| 217 | * |
| 218 | * Upon completion, it also generates a wireless event to notify |
| 219 | * applications. |
| 220 | */ |
| 221 | int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv, |
| 222 | struct mwifiex_user_scan_cfg *scan_req) |
| 223 | { |
| 224 | struct mwifiex_wait_queue *wait = NULL; |
| 225 | int status = 0; |
| 226 | u8 wait_option = MWIFIEX_IOCTL_WAIT; |
| 227 | |
| 228 | /* Allocate an IOCTL request buffer */ |
| 229 | wait = mwifiex_alloc_fill_wait_queue(priv, wait_option); |
| 230 | if (!wait) |
| 231 | return -ENOMEM; |
| 232 | |
| 233 | status = mwifiex_scan_networks(priv, wait, HostCmd_ACT_GEN_SET, |
| 234 | scan_req, NULL); |
| 235 | |
| 236 | status = mwifiex_request_ioctl(priv, wait, status, wait_option); |
| 237 | |
| 238 | if (wait && (status != -EINPROGRESS)) |
| 239 | kfree(wait); |
| 240 | return status; |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * This function checks if wapi is enabled in driver and scanned network is |
| 245 | * compatible with it. |
| 246 | */ |
| 247 | static bool |
| 248 | mwifiex_is_network_compatible_for_wapi(struct mwifiex_private *priv, |
| 249 | struct mwifiex_bssdescriptor *bss_desc) |
| 250 | { |
| 251 | if (priv->sec_info.wapi_enabled && |
| 252 | (bss_desc->bcn_wapi_ie && |
| 253 | ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id == |
| 254 | WLAN_EID_BSS_AC_ACCESS_DELAY))) { |
| 255 | return true; |
| 256 | } |
| 257 | return false; |
| 258 | } |
| 259 | |
| 260 | /* |
| 261 | * This function checks if driver is configured with no security mode and |
| 262 | * scanned network is compatible with it. |
| 263 | */ |
| 264 | static bool |
| 265 | mwifiex_is_network_compatible_for_no_sec(struct mwifiex_private *priv, |
| 266 | struct mwifiex_bssdescriptor *bss_desc) |
| 267 | { |
| 268 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED |
| 269 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled |
| 270 | && ((!bss_desc->bcn_wpa_ie) || |
| 271 | ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != |
| 272 | WLAN_EID_WPA)) |
| 273 | && ((!bss_desc->bcn_rsn_ie) || |
| 274 | ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != |
| 275 | WLAN_EID_RSN)) |
| 276 | && priv->sec_info.encryption_mode == |
| 277 | MWIFIEX_ENCRYPTION_MODE_NONE && !bss_desc->privacy) { |
| 278 | return true; |
| 279 | } |
| 280 | return false; |
| 281 | } |
| 282 | |
| 283 | /* |
| 284 | * This function checks if static WEP is enabled in driver and scanned network |
| 285 | * is compatible with it. |
| 286 | */ |
| 287 | static bool |
| 288 | mwifiex_is_network_compatible_for_static_wep(struct mwifiex_private *priv, |
| 289 | struct mwifiex_bssdescriptor *bss_desc) |
| 290 | { |
| 291 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_ENABLED |
| 292 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled |
| 293 | && bss_desc->privacy) { |
| 294 | return true; |
| 295 | } |
| 296 | return false; |
| 297 | } |
| 298 | |
| 299 | /* |
| 300 | * This function checks if wpa is enabled in driver and scanned network is |
| 301 | * compatible with it. |
| 302 | */ |
| 303 | static bool |
| 304 | mwifiex_is_network_compatible_for_wpa(struct mwifiex_private *priv, |
| 305 | struct mwifiex_bssdescriptor *bss_desc, |
| 306 | int index) |
| 307 | { |
| 308 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED |
| 309 | && priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled |
| 310 | && ((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)).vend_hdr. |
| 311 | element_id == WLAN_EID_WPA)) |
| 312 | /* |
| 313 | * Privacy bit may NOT be set in some APs like |
| 314 | * LinkSys WRT54G && bss_desc->privacy |
| 315 | */ |
| 316 | ) { |
| 317 | dev_dbg(priv->adapter->dev, "info: %s: WPA: index=%d" |
| 318 | " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " |
| 319 | "EncMode=%#x privacy=%#x\n", __func__, index, |
| 320 | (bss_desc->bcn_wpa_ie) ? |
| 321 | (*(bss_desc->bcn_wpa_ie)). |
| 322 | vend_hdr.element_id : 0, |
| 323 | (bss_desc->bcn_rsn_ie) ? |
| 324 | (*(bss_desc->bcn_rsn_ie)). |
| 325 | ieee_hdr.element_id : 0, |
| 326 | (priv->sec_info.wep_status == |
| 327 | MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d", |
| 328 | (priv->sec_info.wpa_enabled) ? "e" : "d", |
| 329 | (priv->sec_info.wpa2_enabled) ? "e" : "d", |
| 330 | priv->sec_info.encryption_mode, |
| 331 | bss_desc->privacy); |
| 332 | return true; |
| 333 | } |
| 334 | return false; |
| 335 | } |
| 336 | |
| 337 | /* |
| 338 | * This function checks if wpa2 is enabled in driver and scanned network is |
| 339 | * compatible with it. |
| 340 | */ |
| 341 | static bool |
| 342 | mwifiex_is_network_compatible_for_wpa2(struct mwifiex_private *priv, |
| 343 | struct mwifiex_bssdescriptor *bss_desc, |
| 344 | int index) |
| 345 | { |
| 346 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED |
| 347 | && !priv->sec_info.wpa_enabled && priv->sec_info.wpa2_enabled |
| 348 | && ((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).ieee_hdr. |
| 349 | element_id == WLAN_EID_RSN)) |
| 350 | /* |
| 351 | * Privacy bit may NOT be set in some APs like |
| 352 | * LinkSys WRT54G && bss_desc->privacy |
| 353 | */ |
| 354 | ) { |
| 355 | dev_dbg(priv->adapter->dev, "info: %s: WPA2: index=%d" |
| 356 | " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " |
| 357 | "EncMode=%#x privacy=%#x\n", __func__, index, |
| 358 | (bss_desc->bcn_wpa_ie) ? |
| 359 | (*(bss_desc->bcn_wpa_ie)). |
| 360 | vend_hdr.element_id : 0, |
| 361 | (bss_desc->bcn_rsn_ie) ? |
| 362 | (*(bss_desc->bcn_rsn_ie)). |
| 363 | ieee_hdr.element_id : 0, |
| 364 | (priv->sec_info.wep_status == |
| 365 | MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d", |
| 366 | (priv->sec_info.wpa_enabled) ? "e" : "d", |
| 367 | (priv->sec_info.wpa2_enabled) ? "e" : "d", |
| 368 | priv->sec_info.encryption_mode, |
| 369 | bss_desc->privacy); |
| 370 | return true; |
| 371 | } |
| 372 | return false; |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * This function checks if adhoc AES is enabled in driver and scanned network is |
| 377 | * compatible with it. |
| 378 | */ |
| 379 | static bool |
| 380 | mwifiex_is_network_compatible_for_adhoc_aes(struct mwifiex_private *priv, |
| 381 | struct mwifiex_bssdescriptor *bss_desc) |
| 382 | { |
| 383 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED |
| 384 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled |
| 385 | && ((!bss_desc->bcn_wpa_ie) || ((*(bss_desc->bcn_wpa_ie)).vend_hdr. |
| 386 | element_id != WLAN_EID_WPA)) |
| 387 | && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr. |
| 388 | element_id != WLAN_EID_RSN)) |
| 389 | && priv->sec_info.encryption_mode == |
| 390 | MWIFIEX_ENCRYPTION_MODE_NONE && bss_desc->privacy) { |
| 391 | return true; |
| 392 | } |
| 393 | return false; |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * This function checks if dynamic WEP is enabled in driver and scanned network |
| 398 | * is compatible with it. |
| 399 | */ |
| 400 | static bool |
| 401 | mwifiex_is_network_compatible_for_dynamic_wep(struct mwifiex_private *priv, |
| 402 | struct mwifiex_bssdescriptor *bss_desc, |
| 403 | int index) |
| 404 | { |
| 405 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED |
| 406 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled |
| 407 | && ((!bss_desc->bcn_wpa_ie) || ((*(bss_desc->bcn_wpa_ie)).vend_hdr. |
| 408 | element_id != WLAN_EID_WPA)) |
| 409 | && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr. |
| 410 | element_id != WLAN_EID_RSN)) |
| 411 | && priv->sec_info.encryption_mode != |
| 412 | MWIFIEX_ENCRYPTION_MODE_NONE && bss_desc->privacy) { |
| 413 | dev_dbg(priv->adapter->dev, "info: %s: dynamic " |
| 414 | "WEP: index=%d wpa_ie=%#x wpa2_ie=%#x " |
| 415 | "EncMode=%#x privacy=%#x\n", |
| 416 | __func__, index, |
| 417 | (bss_desc->bcn_wpa_ie) ? |
| 418 | (*(bss_desc->bcn_wpa_ie)). |
| 419 | vend_hdr.element_id : 0, |
| 420 | (bss_desc->bcn_rsn_ie) ? |
| 421 | (*(bss_desc->bcn_rsn_ie)). |
| 422 | ieee_hdr.element_id : 0, |
| 423 | priv->sec_info.encryption_mode, |
| 424 | bss_desc->privacy); |
| 425 | return true; |
| 426 | } |
| 427 | return false; |
| 428 | } |
| 429 | |
| 430 | /* |
| 431 | * This function checks if a scanned network is compatible with the driver |
| 432 | * settings. |
| 433 | * |
| 434 | * WEP WPA WPA2 ad-hoc encrypt Network |
| 435 | * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible |
| 436 | * 0 0 0 0 NONE 0 0 0 yes No security |
| 437 | * 0 1 0 0 x 1x 1 x yes WPA (disable |
| 438 | * HT if no AES) |
| 439 | * 0 0 1 0 x 1x x 1 yes WPA2 (disable |
| 440 | * HT if no AES) |
| 441 | * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES |
| 442 | * 1 0 0 0 NONE 1 0 0 yes Static WEP |
| 443 | * (disable HT) |
| 444 | * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP |
| 445 | * |
| 446 | * Compatibility is not matched while roaming, except for mode. |
| 447 | */ |
| 448 | static s32 |
| 449 | mwifiex_is_network_compatible(struct mwifiex_private *priv, u32 index, u32 mode) |
| 450 | { |
| 451 | struct mwifiex_adapter *adapter = priv->adapter; |
| 452 | struct mwifiex_bssdescriptor *bss_desc; |
| 453 | |
| 454 | bss_desc = &adapter->scan_table[index]; |
| 455 | bss_desc->disable_11n = false; |
| 456 | |
| 457 | /* Don't check for compatibility if roaming */ |
| 458 | if (priv->media_connected && (priv->bss_mode == MWIFIEX_BSS_MODE_INFRA) |
| 459 | && (bss_desc->bss_mode == MWIFIEX_BSS_MODE_INFRA)) |
| 460 | return index; |
| 461 | |
| 462 | if (priv->wps.session_enable) { |
| 463 | dev_dbg(adapter->dev, |
| 464 | "info: return success directly in WPS period\n"); |
| 465 | return index; |
| 466 | } |
| 467 | |
| 468 | if (mwifiex_is_network_compatible_for_wapi(priv, bss_desc)) { |
| 469 | dev_dbg(adapter->dev, "info: return success for WAPI AP\n"); |
| 470 | return index; |
| 471 | } |
| 472 | |
| 473 | if (bss_desc->bss_mode == mode) { |
| 474 | if (mwifiex_is_network_compatible_for_no_sec(priv, bss_desc)) { |
| 475 | /* No security */ |
| 476 | return index; |
| 477 | } else if (mwifiex_is_network_compatible_for_static_wep(priv, |
| 478 | bss_desc)) { |
| 479 | /* Static WEP enabled */ |
| 480 | dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n"); |
| 481 | bss_desc->disable_11n = true; |
| 482 | return index; |
| 483 | } else if (mwifiex_is_network_compatible_for_wpa(priv, bss_desc, |
| 484 | index)) { |
| 485 | /* WPA enabled */ |
| 486 | if (((priv->adapter->config_bands & BAND_GN |
| 487 | || priv->adapter->config_bands & BAND_AN) |
| 488 | && bss_desc->bcn_ht_cap) |
| 489 | && !mwifiex_is_wpa_oui_present(bss_desc, |
| 490 | CIPHER_SUITE_CCMP)) { |
| 491 | |
| 492 | if (mwifiex_is_wpa_oui_present(bss_desc, |
| 493 | CIPHER_SUITE_TKIP)) { |
| 494 | dev_dbg(adapter->dev, |
| 495 | "info: Disable 11n if AES " |
| 496 | "is not supported by AP\n"); |
| 497 | bss_desc->disable_11n = true; |
| 498 | } else { |
| 499 | return -1; |
| 500 | } |
| 501 | } |
| 502 | return index; |
| 503 | } else if (mwifiex_is_network_compatible_for_wpa2(priv, |
| 504 | bss_desc, index)) { |
| 505 | /* WPA2 enabled */ |
| 506 | if (((priv->adapter->config_bands & BAND_GN |
| 507 | || priv->adapter->config_bands & BAND_AN) |
| 508 | && bss_desc->bcn_ht_cap) |
| 509 | && !mwifiex_is_rsn_oui_present(bss_desc, |
| 510 | CIPHER_SUITE_CCMP)) { |
| 511 | |
| 512 | if (mwifiex_is_rsn_oui_present(bss_desc, |
| 513 | CIPHER_SUITE_TKIP)) { |
| 514 | dev_dbg(adapter->dev, |
| 515 | "info: Disable 11n if AES " |
| 516 | "is not supported by AP\n"); |
| 517 | bss_desc->disable_11n = true; |
| 518 | } else { |
| 519 | return -1; |
| 520 | } |
| 521 | } |
| 522 | return index; |
| 523 | } else if (mwifiex_is_network_compatible_for_adhoc_aes(priv, |
| 524 | bss_desc)) { |
| 525 | /* Ad-hoc AES enabled */ |
| 526 | return index; |
| 527 | } else if (mwifiex_is_network_compatible_for_dynamic_wep(priv, |
| 528 | bss_desc, index)) { |
| 529 | /* Dynamic WEP enabled */ |
| 530 | return index; |
| 531 | } |
| 532 | |
| 533 | /* Security doesn't match */ |
| 534 | dev_dbg(adapter->dev, "info: %s: failed: index=%d " |
| 535 | "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s EncMode" |
| 536 | "=%#x privacy=%#x\n", |
| 537 | __func__, index, |
| 538 | (bss_desc->bcn_wpa_ie) ? |
| 539 | (*(bss_desc->bcn_wpa_ie)).vend_hdr. |
| 540 | element_id : 0, |
| 541 | (bss_desc->bcn_rsn_ie) ? |
| 542 | (*(bss_desc->bcn_rsn_ie)).ieee_hdr. |
| 543 | element_id : 0, |
| 544 | (priv->sec_info.wep_status == |
| 545 | MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d", |
| 546 | (priv->sec_info.wpa_enabled) ? "e" : "d", |
| 547 | (priv->sec_info.wpa2_enabled) ? "e" : "d", |
| 548 | priv->sec_info.encryption_mode, bss_desc->privacy); |
| 549 | return -1; |
| 550 | } |
| 551 | |
| 552 | /* Mode doesn't match */ |
| 553 | return -1; |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * This function finds the best SSID in the scan list. |
| 558 | * |
| 559 | * It searches the scan table for the best SSID that also matches the current |
| 560 | * adapter network preference (mode, security etc.). |
| 561 | */ |
| 562 | static s32 |
| 563 | mwifiex_find_best_network_in_list(struct mwifiex_private *priv) |
| 564 | { |
| 565 | struct mwifiex_adapter *adapter = priv->adapter; |
| 566 | u32 mode = priv->bss_mode; |
| 567 | s32 best_net = -1; |
| 568 | s32 best_rssi = 0; |
| 569 | u32 i; |
| 570 | |
| 571 | dev_dbg(adapter->dev, "info: num of BSSIDs = %d\n", |
| 572 | adapter->num_in_scan_table); |
| 573 | |
| 574 | for (i = 0; i < adapter->num_in_scan_table; i++) { |
| 575 | switch (mode) { |
| 576 | case MWIFIEX_BSS_MODE_INFRA: |
| 577 | case MWIFIEX_BSS_MODE_IBSS: |
| 578 | if (mwifiex_is_network_compatible(priv, i, mode) >= 0) { |
| 579 | if (SCAN_RSSI(adapter->scan_table[i].rssi) > |
| 580 | best_rssi) { |
| 581 | best_rssi = SCAN_RSSI(adapter-> |
| 582 | scan_table[i].rssi); |
| 583 | best_net = i; |
| 584 | } |
| 585 | } |
| 586 | break; |
| 587 | case MWIFIEX_BSS_MODE_AUTO: |
| 588 | default: |
| 589 | if (SCAN_RSSI(adapter->scan_table[i].rssi) > |
| 590 | best_rssi) { |
| 591 | best_rssi = SCAN_RSSI(adapter->scan_table[i]. |
| 592 | rssi); |
| 593 | best_net = i; |
| 594 | } |
| 595 | break; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | return best_net; |
| 600 | } |
| 601 | |
| 602 | /* |
| 603 | * This function creates a channel list for the driver to scan, based |
| 604 | * on region/band information. |
| 605 | * |
| 606 | * This routine is used for any scan that is not provided with a |
| 607 | * specific channel list to scan. |
| 608 | */ |
| 609 | static void |
| 610 | mwifiex_scan_create_channel_list(struct mwifiex_private *priv, |
| 611 | const struct mwifiex_user_scan_cfg |
| 612 | *user_scan_in, |
| 613 | struct mwifiex_chan_scan_param_set |
| 614 | *scan_chan_list, |
| 615 | u8 filtered_scan) |
| 616 | { |
| 617 | enum ieee80211_band band; |
| 618 | struct ieee80211_supported_band *sband; |
| 619 | struct ieee80211_channel *ch; |
| 620 | struct mwifiex_adapter *adapter = priv->adapter; |
| 621 | int chan_idx = 0, i; |
| 622 | u8 scan_type; |
| 623 | |
| 624 | for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) { |
| 625 | |
| 626 | if (!priv->wdev->wiphy->bands[band]) |
| 627 | continue; |
| 628 | |
| 629 | sband = priv->wdev->wiphy->bands[band]; |
| 630 | |
| 631 | for (i = 0; (i < sband->n_channels) ; i++, chan_idx++) { |
| 632 | ch = &sband->channels[i]; |
| 633 | if (ch->flags & IEEE80211_CHAN_DISABLED) |
| 634 | continue; |
| 635 | scan_chan_list[chan_idx].radio_type = band; |
| 636 | scan_type = ch->flags & IEEE80211_CHAN_PASSIVE_SCAN; |
| 637 | if (user_scan_in && |
| 638 | user_scan_in->chan_list[0].scan_time) |
| 639 | scan_chan_list[chan_idx].max_scan_time = |
| 640 | cpu_to_le16((u16) user_scan_in-> |
| 641 | chan_list[0].scan_time); |
| 642 | else if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) |
| 643 | scan_chan_list[chan_idx].max_scan_time = |
| 644 | cpu_to_le16(adapter->passive_scan_time); |
| 645 | else |
| 646 | scan_chan_list[chan_idx].max_scan_time = |
| 647 | cpu_to_le16(adapter->active_scan_time); |
| 648 | if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) |
| 649 | scan_chan_list[chan_idx].chan_scan_mode_bitmap |
| 650 | |= MWIFIEX_PASSIVE_SCAN; |
| 651 | else |
| 652 | scan_chan_list[chan_idx].chan_scan_mode_bitmap |
| 653 | &= ~MWIFIEX_PASSIVE_SCAN; |
| 654 | scan_chan_list[chan_idx].chan_number = |
| 655 | (u32) ch->hw_value; |
| 656 | if (filtered_scan) { |
| 657 | scan_chan_list[chan_idx].max_scan_time = |
| 658 | cpu_to_le16(adapter->specific_scan_time); |
| 659 | scan_chan_list[chan_idx].chan_scan_mode_bitmap |
| 660 | |= MWIFIEX_DISABLE_CHAN_FILT; |
| 661 | } |
| 662 | } |
| 663 | |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * This function constructs and sends multiple scan config commands to |
| 669 | * the firmware. |
| 670 | * |
| 671 | * Previous routines in the code flow have created a scan command configuration |
| 672 | * with any requested TLVs. This function splits the channel TLV into maximum |
| 673 | * channels supported per scan lists and sends the portion of the channel TLV, |
| 674 | * along with the other TLVs, to the firmware. |
| 675 | */ |
| 676 | static int |
| 677 | mwifiex_scan_channel_list(struct mwifiex_private *priv, void *wait_buf, |
| 678 | u32 max_chan_per_scan, u8 filtered_scan, |
| 679 | struct mwifiex_scan_cmd_config *scan_cfg_out, |
| 680 | struct mwifiex_ie_types_chan_list_param_set |
| 681 | *chan_tlv_out, |
| 682 | struct mwifiex_chan_scan_param_set *scan_chan_list) |
| 683 | { |
| 684 | int ret = 0; |
| 685 | struct mwifiex_chan_scan_param_set *tmp_chan_list; |
| 686 | struct mwifiex_chan_scan_param_set *start_chan; |
| 687 | |
| 688 | u32 tlv_idx; |
| 689 | u32 total_scan_time; |
| 690 | u32 done_early; |
| 691 | |
| 692 | if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) { |
| 693 | dev_dbg(priv->adapter->dev, |
| 694 | "info: Scan: Null detect: %p, %p, %p\n", |
| 695 | scan_cfg_out, chan_tlv_out, scan_chan_list); |
| 696 | return -1; |
| 697 | } |
| 698 | |
| 699 | chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); |
| 700 | |
| 701 | /* Set the temp channel struct pointer to the start of the desired |
| 702 | list */ |
| 703 | tmp_chan_list = scan_chan_list; |
| 704 | |
| 705 | /* Loop through the desired channel list, sending a new firmware scan |
| 706 | commands for each max_chan_per_scan channels (or for 1,6,11 |
| 707 | individually if configured accordingly) */ |
| 708 | while (tmp_chan_list->chan_number) { |
| 709 | |
| 710 | tlv_idx = 0; |
| 711 | total_scan_time = 0; |
| 712 | chan_tlv_out->header.len = 0; |
| 713 | start_chan = tmp_chan_list; |
| 714 | done_early = false; |
| 715 | |
| 716 | /* |
| 717 | * Construct the Channel TLV for the scan command. Continue to |
| 718 | * insert channel TLVs until: |
| 719 | * - the tlv_idx hits the maximum configured per scan command |
| 720 | * - the next channel to insert is 0 (end of desired channel |
| 721 | * list) |
| 722 | * - done_early is set (controlling individual scanning of |
| 723 | * 1,6,11) |
| 724 | */ |
| 725 | while (tlv_idx < max_chan_per_scan |
| 726 | && tmp_chan_list->chan_number && !done_early) { |
| 727 | |
| 728 | dev_dbg(priv->adapter->dev, |
| 729 | "info: Scan: Chan(%3d), Radio(%d)," |
| 730 | " Mode(%d, %d), Dur(%d)\n", |
| 731 | tmp_chan_list->chan_number, |
| 732 | tmp_chan_list->radio_type, |
| 733 | tmp_chan_list->chan_scan_mode_bitmap |
| 734 | & MWIFIEX_PASSIVE_SCAN, |
| 735 | (tmp_chan_list->chan_scan_mode_bitmap |
| 736 | & MWIFIEX_DISABLE_CHAN_FILT) >> 1, |
| 737 | le16_to_cpu(tmp_chan_list->max_scan_time)); |
| 738 | |
| 739 | /* Copy the current channel TLV to the command being |
| 740 | prepared */ |
| 741 | memcpy(chan_tlv_out->chan_scan_param + tlv_idx, |
| 742 | tmp_chan_list, |
| 743 | sizeof(chan_tlv_out->chan_scan_param)); |
| 744 | |
| 745 | /* Increment the TLV header length by the size |
| 746 | appended */ |
| 747 | chan_tlv_out->header.len = |
| 748 | cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) + |
| 749 | (sizeof(chan_tlv_out->chan_scan_param))); |
| 750 | |
| 751 | /* |
| 752 | * The tlv buffer length is set to the number of bytes |
| 753 | * of the between the channel tlv pointer and the start |
| 754 | * of the tlv buffer. This compensates for any TLVs |
| 755 | * that were appended before the channel list. |
| 756 | */ |
| 757 | scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out - |
| 758 | scan_cfg_out->tlv_buf); |
| 759 | |
| 760 | /* Add the size of the channel tlv header and the data |
| 761 | length */ |
| 762 | scan_cfg_out->tlv_buf_len += |
| 763 | (sizeof(chan_tlv_out->header) |
| 764 | + le16_to_cpu(chan_tlv_out->header.len)); |
| 765 | |
| 766 | /* Increment the index to the channel tlv we are |
| 767 | constructing */ |
| 768 | tlv_idx++; |
| 769 | |
| 770 | /* Count the total scan time per command */ |
| 771 | total_scan_time += |
| 772 | le16_to_cpu(tmp_chan_list->max_scan_time); |
| 773 | |
| 774 | done_early = false; |
| 775 | |
| 776 | /* Stop the loop if the *current* channel is in the |
| 777 | 1,6,11 set and we are not filtering on a BSSID |
| 778 | or SSID. */ |
| 779 | if (!filtered_scan && (tmp_chan_list->chan_number == 1 |
| 780 | || tmp_chan_list->chan_number == 6 |
| 781 | || tmp_chan_list->chan_number == 11)) |
| 782 | done_early = true; |
| 783 | |
| 784 | /* Increment the tmp pointer to the next channel to |
| 785 | be scanned */ |
| 786 | tmp_chan_list++; |
| 787 | |
| 788 | /* Stop the loop if the *next* channel is in the 1,6,11 |
| 789 | set. This will cause it to be the only channel |
| 790 | scanned on the next interation */ |
| 791 | if (!filtered_scan && (tmp_chan_list->chan_number == 1 |
| 792 | || tmp_chan_list->chan_number == 6 |
| 793 | || tmp_chan_list->chan_number == 11)) |
| 794 | done_early = true; |
| 795 | } |
| 796 | |
| 797 | /* The total scan time should be less than scan command timeout |
| 798 | value */ |
| 799 | if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) { |
| 800 | dev_err(priv->adapter->dev, "total scan time %dms" |
| 801 | " is over limit (%dms), scan skipped\n", |
| 802 | total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME); |
| 803 | ret = -1; |
| 804 | break; |
| 805 | } |
| 806 | |
| 807 | priv->adapter->scan_channels = start_chan; |
| 808 | |
| 809 | /* Send the scan command to the firmware with the specified |
| 810 | cfg */ |
| 811 | ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11_SCAN, |
| 812 | HostCmd_ACT_GEN_SET, |
| 813 | 0, wait_buf, scan_cfg_out); |
| 814 | if (ret) |
| 815 | break; |
| 816 | } |
| 817 | |
| 818 | if (ret) |
| 819 | return -1; |
| 820 | |
| 821 | return 0; |
| 822 | } |
| 823 | |
| 824 | /* |
| 825 | * This function constructs a scan command configuration structure to use |
| 826 | * in scan commands. |
| 827 | * |
| 828 | * Application layer or other functions can invoke network scanning |
| 829 | * with a scan configuration supplied in a user scan configuration structure. |
| 830 | * This structure is used as the basis of one or many scan command configuration |
| 831 | * commands that are sent to the command processing module and eventually to the |
| 832 | * firmware. |
| 833 | * |
| 834 | * This function creates a scan command configuration structure based on the |
| 835 | * following user supplied parameters (if present): |
| 836 | * - SSID filter |
| 837 | * - BSSID filter |
| 838 | * - Number of Probes to be sent |
| 839 | * - Channel list |
| 840 | * |
| 841 | * If the SSID or BSSID filter is not present, the filter is disabled/cleared. |
| 842 | * If the number of probes is not set, adapter default setting is used. |
| 843 | */ |
| 844 | static void |
| 845 | mwifiex_scan_setup_scan_config(struct mwifiex_private *priv, |
| 846 | const struct mwifiex_user_scan_cfg *user_scan_in, |
| 847 | struct mwifiex_scan_cmd_config *scan_cfg_out, |
| 848 | struct mwifiex_ie_types_chan_list_param_set |
| 849 | **chan_list_out, |
| 850 | struct mwifiex_chan_scan_param_set |
| 851 | *scan_chan_list, |
| 852 | u8 *max_chan_per_scan, u8 *filtered_scan, |
| 853 | u8 *scan_current_only) |
| 854 | { |
| 855 | struct mwifiex_adapter *adapter = priv->adapter; |
| 856 | struct mwifiex_ie_types_num_probes *num_probes_tlv; |
| 857 | struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; |
| 858 | struct mwifiex_ie_types_rates_param_set *rates_tlv; |
| 859 | const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 }; |
| 860 | u8 *tlv_pos; |
| 861 | u32 num_probes; |
| 862 | u32 ssid_len; |
| 863 | u32 chan_idx; |
| 864 | u32 scan_type; |
| 865 | u16 scan_dur; |
| 866 | u8 channel; |
| 867 | u8 radio_type; |
| 868 | u32 ssid_idx; |
| 869 | u8 ssid_filter; |
| 870 | u8 rates[MWIFIEX_SUPPORTED_RATES]; |
| 871 | u32 rates_size; |
| 872 | struct mwifiex_ie_types_htcap *ht_cap; |
| 873 | |
| 874 | /* The tlv_buf_len is calculated for each scan command. The TLVs added |
| 875 | in this routine will be preserved since the routine that sends the |
| 876 | command will append channelTLVs at *chan_list_out. The difference |
| 877 | between the *chan_list_out and the tlv_buf start will be used to |
| 878 | calculate the size of anything we add in this routine. */ |
| 879 | scan_cfg_out->tlv_buf_len = 0; |
| 880 | |
| 881 | /* Running tlv pointer. Assigned to chan_list_out at end of function |
| 882 | so later routines know where channels can be added to the command |
| 883 | buf */ |
| 884 | tlv_pos = scan_cfg_out->tlv_buf; |
| 885 | |
| 886 | /* Initialize the scan as un-filtered; the flag is later set to TRUE |
| 887 | below if a SSID or BSSID filter is sent in the command */ |
| 888 | *filtered_scan = false; |
| 889 | |
| 890 | /* Initialize the scan as not being only on the current channel. If |
| 891 | the channel list is customized, only contains one channel, and is |
| 892 | the active channel, this is set true and data flow is not halted. */ |
| 893 | *scan_current_only = false; |
| 894 | |
| 895 | if (user_scan_in) { |
| 896 | |
| 897 | /* Default the ssid_filter flag to TRUE, set false under |
| 898 | certain wildcard conditions and qualified by the existence |
| 899 | of an SSID list before marking the scan as filtered */ |
| 900 | ssid_filter = true; |
| 901 | |
| 902 | /* Set the BSS type scan filter, use Adapter setting if |
| 903 | unset */ |
| 904 | scan_cfg_out->bss_mode = |
| 905 | (user_scan_in->bss_mode ? (u8) user_scan_in-> |
| 906 | bss_mode : (u8) adapter->scan_mode); |
| 907 | |
| 908 | /* Set the number of probes to send, use Adapter setting |
| 909 | if unset */ |
| 910 | num_probes = |
| 911 | (user_scan_in->num_probes ? user_scan_in-> |
| 912 | num_probes : adapter->scan_probes); |
| 913 | |
| 914 | /* |
| 915 | * Set the BSSID filter to the incoming configuration, |
| 916 | * if non-zero. If not set, it will remain disabled |
| 917 | * (all zeros). |
| 918 | */ |
| 919 | memcpy(scan_cfg_out->specific_bssid, |
| 920 | user_scan_in->specific_bssid, |
| 921 | sizeof(scan_cfg_out->specific_bssid)); |
| 922 | |
| 923 | for (ssid_idx = 0; |
| 924 | ((ssid_idx < ARRAY_SIZE(user_scan_in->ssid_list)) |
| 925 | && (*user_scan_in->ssid_list[ssid_idx].ssid |
| 926 | || user_scan_in->ssid_list[ssid_idx].max_len)); |
| 927 | ssid_idx++) { |
| 928 | |
| 929 | ssid_len = strlen(user_scan_in->ssid_list[ssid_idx]. |
| 930 | ssid) + 1; |
| 931 | |
| 932 | wildcard_ssid_tlv = |
| 933 | (struct mwifiex_ie_types_wildcard_ssid_params *) |
| 934 | tlv_pos; |
| 935 | wildcard_ssid_tlv->header.type = |
| 936 | cpu_to_le16(TLV_TYPE_WILDCARDSSID); |
| 937 | wildcard_ssid_tlv->header.len = cpu_to_le16( |
| 938 | (u16) (ssid_len + sizeof(wildcard_ssid_tlv-> |
| 939 | max_ssid_length))); |
| 940 | wildcard_ssid_tlv->max_ssid_length = |
| 941 | user_scan_in->ssid_list[ssid_idx].max_len; |
| 942 | |
| 943 | memcpy(wildcard_ssid_tlv->ssid, |
| 944 | user_scan_in->ssid_list[ssid_idx].ssid, |
| 945 | ssid_len); |
| 946 | |
| 947 | tlv_pos += (sizeof(wildcard_ssid_tlv->header) |
| 948 | + le16_to_cpu(wildcard_ssid_tlv->header.len)); |
| 949 | |
| 950 | dev_dbg(adapter->dev, "info: scan: ssid_list[%d]: %s, %d\n", |
| 951 | ssid_idx, wildcard_ssid_tlv->ssid, |
| 952 | wildcard_ssid_tlv->max_ssid_length); |
| 953 | |
| 954 | /* Empty wildcard ssid with a maxlen will match many or |
| 955 | potentially all SSIDs (maxlen == 32), therefore do |
| 956 | not treat the scan as |
| 957 | filtered. */ |
| 958 | if (!ssid_len && wildcard_ssid_tlv->max_ssid_length) |
| 959 | ssid_filter = false; |
| 960 | |
| 961 | } |
| 962 | |
| 963 | /* |
| 964 | * The default number of channels sent in the command is low to |
| 965 | * ensure the response buffer from the firmware does not |
| 966 | * truncate scan results. That is not an issue with an SSID |
| 967 | * or BSSID filter applied to the scan results in the firmware. |
| 968 | */ |
| 969 | if ((ssid_idx && ssid_filter) |
| 970 | || memcmp(scan_cfg_out->specific_bssid, &zero_mac, |
| 971 | sizeof(zero_mac))) |
| 972 | *filtered_scan = true; |
| 973 | } else { |
| 974 | scan_cfg_out->bss_mode = (u8) adapter->scan_mode; |
| 975 | num_probes = adapter->scan_probes; |
| 976 | } |
| 977 | |
| 978 | /* |
| 979 | * If a specific BSSID or SSID is used, the number of channels in the |
| 980 | * scan command will be increased to the absolute maximum. |
| 981 | */ |
| 982 | if (*filtered_scan) |
| 983 | *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; |
| 984 | else |
| 985 | *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD; |
| 986 | |
| 987 | /* If the input config or adapter has the number of Probes set, |
| 988 | add tlv */ |
| 989 | if (num_probes) { |
| 990 | |
| 991 | dev_dbg(adapter->dev, "info: scan: num_probes = %d\n", |
| 992 | num_probes); |
| 993 | |
| 994 | num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos; |
| 995 | num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); |
| 996 | num_probes_tlv->header.len = |
| 997 | cpu_to_le16(sizeof(num_probes_tlv->num_probes)); |
| 998 | num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes); |
| 999 | |
| 1000 | tlv_pos += sizeof(num_probes_tlv->header) + |
| 1001 | le16_to_cpu(num_probes_tlv->header.len); |
| 1002 | |
| 1003 | } |
| 1004 | |
| 1005 | /* Append rates tlv */ |
| 1006 | memset(rates, 0, sizeof(rates)); |
| 1007 | |
| 1008 | rates_size = mwifiex_get_supported_rates(priv, rates); |
| 1009 | |
| 1010 | rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos; |
| 1011 | rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES); |
| 1012 | rates_tlv->header.len = cpu_to_le16((u16) rates_size); |
| 1013 | memcpy(rates_tlv->rates, rates, rates_size); |
| 1014 | tlv_pos += sizeof(rates_tlv->header) + rates_size; |
| 1015 | |
| 1016 | dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size); |
| 1017 | |
| 1018 | if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) |
| 1019 | && (priv->adapter->config_bands & BAND_GN |
| 1020 | || priv->adapter->config_bands & BAND_AN)) { |
| 1021 | ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos; |
| 1022 | memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap)); |
| 1023 | ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY); |
| 1024 | ht_cap->header.len = |
| 1025 | cpu_to_le16(sizeof(struct ieee80211_ht_cap)); |
| 1026 | mwifiex_fill_cap_info(priv, ht_cap); |
| 1027 | tlv_pos += sizeof(struct mwifiex_ie_types_htcap); |
| 1028 | } |
| 1029 | |
| 1030 | /* Append vendor specific IE TLV */ |
| 1031 | mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos); |
| 1032 | |
| 1033 | /* |
| 1034 | * Set the output for the channel TLV to the address in the tlv buffer |
| 1035 | * past any TLVs that were added in this function (SSID, num_probes). |
| 1036 | * Channel TLVs will be added past this for each scan command, |
| 1037 | * preserving the TLVs that were previously added. |
| 1038 | */ |
| 1039 | *chan_list_out = |
| 1040 | (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos; |
| 1041 | |
| 1042 | if (user_scan_in && user_scan_in->chan_list[0].chan_number) { |
| 1043 | |
| 1044 | dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n"); |
| 1045 | |
| 1046 | for (chan_idx = 0; |
| 1047 | chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX |
| 1048 | && user_scan_in->chan_list[chan_idx].chan_number; |
| 1049 | chan_idx++) { |
| 1050 | |
| 1051 | channel = user_scan_in->chan_list[chan_idx].chan_number; |
| 1052 | (scan_chan_list + chan_idx)->chan_number = channel; |
| 1053 | |
| 1054 | radio_type = |
| 1055 | user_scan_in->chan_list[chan_idx].radio_type; |
| 1056 | (scan_chan_list + chan_idx)->radio_type = radio_type; |
| 1057 | |
| 1058 | scan_type = user_scan_in->chan_list[chan_idx].scan_type; |
| 1059 | |
| 1060 | if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) |
| 1061 | (scan_chan_list + |
| 1062 | chan_idx)->chan_scan_mode_bitmap |
| 1063 | |= MWIFIEX_PASSIVE_SCAN; |
| 1064 | else |
| 1065 | (scan_chan_list + |
| 1066 | chan_idx)->chan_scan_mode_bitmap |
| 1067 | &= ~MWIFIEX_PASSIVE_SCAN; |
| 1068 | |
| 1069 | if (user_scan_in->chan_list[chan_idx].scan_time) { |
| 1070 | scan_dur = (u16) user_scan_in-> |
| 1071 | chan_list[chan_idx].scan_time; |
| 1072 | } else { |
| 1073 | if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) |
| 1074 | scan_dur = adapter->passive_scan_time; |
| 1075 | else if (*filtered_scan) |
| 1076 | scan_dur = adapter->specific_scan_time; |
| 1077 | else |
| 1078 | scan_dur = adapter->active_scan_time; |
| 1079 | } |
| 1080 | |
| 1081 | (scan_chan_list + chan_idx)->min_scan_time = |
| 1082 | cpu_to_le16(scan_dur); |
| 1083 | (scan_chan_list + chan_idx)->max_scan_time = |
| 1084 | cpu_to_le16(scan_dur); |
| 1085 | } |
| 1086 | |
| 1087 | /* Check if we are only scanning the current channel */ |
| 1088 | if ((chan_idx == 1) |
| 1089 | && (user_scan_in->chan_list[0].chan_number |
| 1090 | == priv->curr_bss_params.bss_descriptor.channel)) { |
| 1091 | *scan_current_only = true; |
| 1092 | dev_dbg(adapter->dev, |
| 1093 | "info: Scan: Scanning current channel only\n"); |
| 1094 | } |
| 1095 | |
| 1096 | } else { |
| 1097 | dev_dbg(adapter->dev, |
| 1098 | "info: Scan: Creating full region channel list\n"); |
| 1099 | mwifiex_scan_create_channel_list(priv, user_scan_in, |
| 1100 | scan_chan_list, |
| 1101 | *filtered_scan); |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | /* |
| 1106 | * This function inspects the scan response buffer for pointers to |
| 1107 | * expected TLVs. |
| 1108 | * |
| 1109 | * TLVs can be included at the end of the scan response BSS information. |
| 1110 | * |
| 1111 | * Data in the buffer is parsed pointers to TLVs that can potentially |
| 1112 | * be passed back in the response. |
| 1113 | */ |
| 1114 | static void |
| 1115 | mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter, |
| 1116 | struct mwifiex_ie_types_data *tlv, |
| 1117 | u32 tlv_buf_size, u32 req_tlv_type, |
| 1118 | struct mwifiex_ie_types_data **tlv_data) |
| 1119 | { |
| 1120 | struct mwifiex_ie_types_data *current_tlv; |
| 1121 | u32 tlv_buf_left; |
| 1122 | u32 tlv_type; |
| 1123 | u32 tlv_len; |
| 1124 | |
| 1125 | current_tlv = tlv; |
| 1126 | tlv_buf_left = tlv_buf_size; |
| 1127 | *tlv_data = NULL; |
| 1128 | |
| 1129 | dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n", |
| 1130 | tlv_buf_size); |
| 1131 | |
| 1132 | while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) { |
| 1133 | |
| 1134 | tlv_type = le16_to_cpu(current_tlv->header.type); |
| 1135 | tlv_len = le16_to_cpu(current_tlv->header.len); |
| 1136 | |
| 1137 | if (sizeof(tlv->header) + tlv_len > tlv_buf_left) { |
| 1138 | dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n"); |
| 1139 | break; |
| 1140 | } |
| 1141 | |
| 1142 | if (req_tlv_type == tlv_type) { |
| 1143 | switch (tlv_type) { |
| 1144 | case TLV_TYPE_TSFTIMESTAMP: |
| 1145 | dev_dbg(adapter->dev, "info: SCAN_RESP: TSF " |
| 1146 | "timestamp TLV, len = %d\n", tlv_len); |
| 1147 | *tlv_data = (struct mwifiex_ie_types_data *) |
| 1148 | current_tlv; |
| 1149 | break; |
| 1150 | case TLV_TYPE_CHANNELBANDLIST: |
| 1151 | dev_dbg(adapter->dev, "info: SCAN_RESP: channel" |
| 1152 | " band list TLV, len = %d\n", tlv_len); |
| 1153 | *tlv_data = (struct mwifiex_ie_types_data *) |
| 1154 | current_tlv; |
| 1155 | break; |
| 1156 | default: |
| 1157 | dev_err(adapter->dev, |
| 1158 | "SCAN_RESP: unhandled TLV = %d\n", |
| 1159 | tlv_type); |
| 1160 | /* Give up, this seems corrupted */ |
| 1161 | return; |
| 1162 | } |
| 1163 | } |
| 1164 | |
| 1165 | if (*tlv_data) |
| 1166 | break; |
| 1167 | |
| 1168 | |
| 1169 | tlv_buf_left -= (sizeof(tlv->header) + tlv_len); |
| 1170 | current_tlv = |
| 1171 | (struct mwifiex_ie_types_data *) (current_tlv->data + |
| 1172 | tlv_len); |
| 1173 | |
| 1174 | } /* while */ |
| 1175 | } |
| 1176 | |
| 1177 | /* |
| 1178 | * This function interprets a BSS scan response returned from the firmware. |
| 1179 | * |
| 1180 | * The various fixed fields and IEs are parsed and passed back for a BSS |
| 1181 | * probe response or beacon from scan command. Information is recorded as |
| 1182 | * needed in the scan table for that entry. |
| 1183 | * |
| 1184 | * The following IE types are recognized and parsed - |
| 1185 | * - SSID |
| 1186 | * - Supported rates |
| 1187 | * - FH parameters set |
| 1188 | * - DS parameters set |
| 1189 | * - CF parameters set |
| 1190 | * - IBSS parameters set |
| 1191 | * - ERP information |
| 1192 | * - Extended supported rates |
| 1193 | * - Vendor specific (221) |
| 1194 | * - RSN IE |
| 1195 | * - WAPI IE |
| 1196 | * - HT capability |
| 1197 | * - HT operation |
| 1198 | * - BSS Coexistence 20/40 |
| 1199 | * - Extended capability |
| 1200 | * - Overlapping BSS scan parameters |
| 1201 | */ |
| 1202 | static int |
| 1203 | mwifiex_interpret_bss_desc_with_ie(struct mwifiex_adapter *adapter, |
| 1204 | struct mwifiex_bssdescriptor *bss_entry, |
| 1205 | u8 **beacon_info, u32 *bytes_left) |
| 1206 | { |
| 1207 | int ret = 0; |
| 1208 | u8 element_id; |
| 1209 | struct ieee_types_fh_param_set *fh_param_set; |
| 1210 | struct ieee_types_ds_param_set *ds_param_set; |
| 1211 | struct ieee_types_cf_param_set *cf_param_set; |
| 1212 | struct ieee_types_ibss_param_set *ibss_param_set; |
| 1213 | struct mwifiex_802_11_fixed_ies fixed_ie; |
| 1214 | u8 *current_ptr; |
| 1215 | u8 *rate; |
| 1216 | u8 element_len; |
| 1217 | u16 total_ie_len; |
| 1218 | u8 bytes_to_copy; |
| 1219 | u8 rate_size; |
| 1220 | u16 beacon_size; |
| 1221 | u8 found_data_rate_ie; |
| 1222 | u32 bytes_left_for_current_beacon; |
| 1223 | struct ieee_types_vendor_specific *vendor_ie; |
| 1224 | const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; |
| 1225 | const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; |
| 1226 | |
| 1227 | found_data_rate_ie = false; |
| 1228 | rate_size = 0; |
| 1229 | beacon_size = 0; |
| 1230 | |
| 1231 | if (*bytes_left >= sizeof(beacon_size)) { |
| 1232 | /* Extract & convert beacon size from the command buffer */ |
| 1233 | memcpy(&beacon_size, *beacon_info, sizeof(beacon_size)); |
| 1234 | *bytes_left -= sizeof(beacon_size); |
| 1235 | *beacon_info += sizeof(beacon_size); |
| 1236 | } |
| 1237 | |
| 1238 | if (!beacon_size || beacon_size > *bytes_left) { |
| 1239 | *beacon_info += *bytes_left; |
| 1240 | *bytes_left = 0; |
| 1241 | return -1; |
| 1242 | } |
| 1243 | |
| 1244 | /* Initialize the current working beacon pointer for this BSS |
| 1245 | iteration */ |
| 1246 | current_ptr = *beacon_info; |
| 1247 | |
| 1248 | /* Advance the return beacon pointer past the current beacon */ |
| 1249 | *beacon_info += beacon_size; |
| 1250 | *bytes_left -= beacon_size; |
| 1251 | |
| 1252 | bytes_left_for_current_beacon = beacon_size; |
| 1253 | |
| 1254 | memcpy(bss_entry->mac_address, current_ptr, ETH_ALEN); |
| 1255 | dev_dbg(adapter->dev, "info: InterpretIE: AP MAC Addr: %pM\n", |
| 1256 | bss_entry->mac_address); |
| 1257 | |
| 1258 | current_ptr += ETH_ALEN; |
| 1259 | bytes_left_for_current_beacon -= ETH_ALEN; |
| 1260 | |
| 1261 | if (bytes_left_for_current_beacon < 12) { |
| 1262 | dev_err(adapter->dev, "InterpretIE: not enough bytes left\n"); |
| 1263 | return -1; |
| 1264 | } |
| 1265 | |
| 1266 | /* |
| 1267 | * Next 4 fields are RSSI, time stamp, beacon interval, |
| 1268 | * and capability information |
| 1269 | */ |
| 1270 | |
| 1271 | /* RSSI is 1 byte long */ |
| 1272 | bss_entry->rssi = (s32) (*current_ptr); |
| 1273 | dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%02X\n", *current_ptr); |
| 1274 | current_ptr += 1; |
| 1275 | bytes_left_for_current_beacon -= 1; |
| 1276 | |
| 1277 | /* |
| 1278 | * The RSSI is not part of the beacon/probe response. After we have |
| 1279 | * advanced current_ptr past the RSSI field, save the remaining |
| 1280 | * data for use at the application layer |
| 1281 | */ |
| 1282 | bss_entry->beacon_buf = current_ptr; |
| 1283 | bss_entry->beacon_buf_size = bytes_left_for_current_beacon; |
| 1284 | |
| 1285 | /* Time stamp is 8 bytes long */ |
| 1286 | memcpy(fixed_ie.time_stamp, current_ptr, 8); |
| 1287 | memcpy(bss_entry->time_stamp, current_ptr, 8); |
| 1288 | current_ptr += 8; |
| 1289 | bytes_left_for_current_beacon -= 8; |
| 1290 | |
| 1291 | /* Beacon interval is 2 bytes long */ |
| 1292 | memcpy(&fixed_ie.beacon_interval, current_ptr, 2); |
| 1293 | bss_entry->beacon_period = le16_to_cpu(fixed_ie.beacon_interval); |
| 1294 | current_ptr += 2; |
| 1295 | bytes_left_for_current_beacon -= 2; |
| 1296 | |
| 1297 | /* Capability information is 2 bytes long */ |
| 1298 | memcpy(&fixed_ie.capabilities, current_ptr, 2); |
| 1299 | dev_dbg(adapter->dev, "info: InterpretIE: fixed_ie.capabilities=0x%X\n", |
| 1300 | fixed_ie.capabilities); |
| 1301 | bss_entry->cap_info_bitmap = le16_to_cpu(fixed_ie.capabilities); |
| 1302 | current_ptr += 2; |
| 1303 | bytes_left_for_current_beacon -= 2; |
| 1304 | |
| 1305 | /* Rest of the current buffer are IE's */ |
| 1306 | dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP = %d\n", |
| 1307 | bytes_left_for_current_beacon); |
| 1308 | |
| 1309 | if (bss_entry->cap_info_bitmap & WLAN_CAPABILITY_PRIVACY) { |
| 1310 | dev_dbg(adapter->dev, "info: InterpretIE: AP WEP enabled\n"); |
| 1311 | bss_entry->privacy = MWIFIEX_802_11_PRIV_FILTER_8021X_WEP; |
| 1312 | } else { |
| 1313 | bss_entry->privacy = MWIFIEX_802_11_PRIV_FILTER_ACCEPT_ALL; |
| 1314 | } |
| 1315 | |
| 1316 | if (bss_entry->cap_info_bitmap & WLAN_CAPABILITY_IBSS) |
| 1317 | bss_entry->bss_mode = MWIFIEX_BSS_MODE_IBSS; |
| 1318 | else |
| 1319 | bss_entry->bss_mode = MWIFIEX_BSS_MODE_INFRA; |
| 1320 | |
| 1321 | |
| 1322 | /* Process variable IE */ |
| 1323 | while (bytes_left_for_current_beacon >= 2) { |
| 1324 | element_id = *current_ptr; |
| 1325 | element_len = *(current_ptr + 1); |
| 1326 | total_ie_len = element_len + sizeof(struct ieee_types_header); |
| 1327 | |
| 1328 | if (bytes_left_for_current_beacon < total_ie_len) { |
| 1329 | dev_err(adapter->dev, "err: InterpretIE: in processing" |
| 1330 | " IE, bytes left < IE length\n"); |
| 1331 | bytes_left_for_current_beacon = 0; |
| 1332 | ret = -1; |
| 1333 | continue; |
| 1334 | } |
| 1335 | switch (element_id) { |
| 1336 | case WLAN_EID_SSID: |
| 1337 | bss_entry->ssid.ssid_len = element_len; |
| 1338 | memcpy(bss_entry->ssid.ssid, (current_ptr + 2), |
| 1339 | element_len); |
| 1340 | dev_dbg(adapter->dev, "info: InterpretIE: ssid: %-32s\n", |
| 1341 | bss_entry->ssid.ssid); |
| 1342 | break; |
| 1343 | |
| 1344 | case WLAN_EID_SUPP_RATES: |
| 1345 | memcpy(bss_entry->data_rates, current_ptr + 2, |
| 1346 | element_len); |
| 1347 | memcpy(bss_entry->supported_rates, current_ptr + 2, |
| 1348 | element_len); |
| 1349 | rate_size = element_len; |
| 1350 | found_data_rate_ie = true; |
| 1351 | break; |
| 1352 | |
| 1353 | case WLAN_EID_FH_PARAMS: |
| 1354 | fh_param_set = |
| 1355 | (struct ieee_types_fh_param_set *) current_ptr; |
| 1356 | memcpy(&bss_entry->phy_param_set.fh_param_set, |
| 1357 | fh_param_set, |
| 1358 | sizeof(struct ieee_types_fh_param_set)); |
| 1359 | break; |
| 1360 | |
| 1361 | case WLAN_EID_DS_PARAMS: |
| 1362 | ds_param_set = |
| 1363 | (struct ieee_types_ds_param_set *) current_ptr; |
| 1364 | |
| 1365 | bss_entry->channel = ds_param_set->current_chan; |
| 1366 | |
| 1367 | memcpy(&bss_entry->phy_param_set.ds_param_set, |
| 1368 | ds_param_set, |
| 1369 | sizeof(struct ieee_types_ds_param_set)); |
| 1370 | break; |
| 1371 | |
| 1372 | case WLAN_EID_CF_PARAMS: |
| 1373 | cf_param_set = |
| 1374 | (struct ieee_types_cf_param_set *) current_ptr; |
| 1375 | memcpy(&bss_entry->ss_param_set.cf_param_set, |
| 1376 | cf_param_set, |
| 1377 | sizeof(struct ieee_types_cf_param_set)); |
| 1378 | break; |
| 1379 | |
| 1380 | case WLAN_EID_IBSS_PARAMS: |
| 1381 | ibss_param_set = |
| 1382 | (struct ieee_types_ibss_param_set *) |
| 1383 | current_ptr; |
| 1384 | memcpy(&bss_entry->ss_param_set.ibss_param_set, |
| 1385 | ibss_param_set, |
| 1386 | sizeof(struct ieee_types_ibss_param_set)); |
| 1387 | break; |
| 1388 | |
| 1389 | case WLAN_EID_ERP_INFO: |
| 1390 | bss_entry->erp_flags = *(current_ptr + 2); |
| 1391 | break; |
| 1392 | |
| 1393 | case WLAN_EID_EXT_SUPP_RATES: |
| 1394 | /* |
| 1395 | * Only process extended supported rate |
| 1396 | * if data rate is already found. |
| 1397 | * Data rate IE should come before |
| 1398 | * extended supported rate IE |
| 1399 | */ |
| 1400 | if (found_data_rate_ie) { |
| 1401 | if ((element_len + rate_size) > |
| 1402 | MWIFIEX_SUPPORTED_RATES) |
| 1403 | bytes_to_copy = |
| 1404 | (MWIFIEX_SUPPORTED_RATES - |
| 1405 | rate_size); |
| 1406 | else |
| 1407 | bytes_to_copy = element_len; |
| 1408 | |
| 1409 | rate = (u8 *) bss_entry->data_rates; |
| 1410 | rate += rate_size; |
| 1411 | memcpy(rate, current_ptr + 2, bytes_to_copy); |
| 1412 | |
| 1413 | rate = (u8 *) bss_entry->supported_rates; |
| 1414 | rate += rate_size; |
| 1415 | memcpy(rate, current_ptr + 2, bytes_to_copy); |
| 1416 | } |
| 1417 | break; |
| 1418 | |
| 1419 | case WLAN_EID_VENDOR_SPECIFIC: |
| 1420 | vendor_ie = (struct ieee_types_vendor_specific *) |
| 1421 | current_ptr; |
| 1422 | |
| 1423 | if (!memcmp |
| 1424 | (vendor_ie->vend_hdr.oui, wpa_oui, |
| 1425 | sizeof(wpa_oui))) { |
| 1426 | bss_entry->bcn_wpa_ie = |
| 1427 | (struct ieee_types_vendor_specific *) |
| 1428 | current_ptr; |
| 1429 | bss_entry->wpa_offset = (u16) (current_ptr - |
| 1430 | bss_entry->beacon_buf); |
| 1431 | } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui, |
| 1432 | sizeof(wmm_oui))) { |
| 1433 | if (total_ie_len == |
| 1434 | sizeof(struct ieee_types_wmm_parameter) |
| 1435 | || total_ie_len == |
| 1436 | sizeof(struct ieee_types_wmm_info)) |
| 1437 | /* |
| 1438 | * Only accept and copy the WMM IE if |
| 1439 | * it matches the size expected for the |
| 1440 | * WMM Info IE or the WMM Parameter IE. |
| 1441 | */ |
| 1442 | memcpy((u8 *) &bss_entry->wmm_ie, |
| 1443 | current_ptr, total_ie_len); |
| 1444 | } |
| 1445 | break; |
| 1446 | case WLAN_EID_RSN: |
| 1447 | bss_entry->bcn_rsn_ie = |
| 1448 | (struct ieee_types_generic *) current_ptr; |
| 1449 | bss_entry->rsn_offset = (u16) (current_ptr - |
| 1450 | bss_entry->beacon_buf); |
| 1451 | break; |
| 1452 | case WLAN_EID_BSS_AC_ACCESS_DELAY: |
| 1453 | bss_entry->bcn_wapi_ie = |
| 1454 | (struct ieee_types_generic *) current_ptr; |
| 1455 | bss_entry->wapi_offset = (u16) (current_ptr - |
| 1456 | bss_entry->beacon_buf); |
| 1457 | break; |
| 1458 | case WLAN_EID_HT_CAPABILITY: |
| 1459 | bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) |
| 1460 | (current_ptr + |
| 1461 | sizeof(struct ieee_types_header)); |
| 1462 | bss_entry->ht_cap_offset = (u16) (current_ptr + |
| 1463 | sizeof(struct ieee_types_header) - |
| 1464 | bss_entry->beacon_buf); |
| 1465 | break; |
| 1466 | case WLAN_EID_HT_INFORMATION: |
| 1467 | bss_entry->bcn_ht_info = (struct ieee80211_ht_info *) |
| 1468 | (current_ptr + |
| 1469 | sizeof(struct ieee_types_header)); |
| 1470 | bss_entry->ht_info_offset = (u16) (current_ptr + |
| 1471 | sizeof(struct ieee_types_header) - |
| 1472 | bss_entry->beacon_buf); |
| 1473 | break; |
| 1474 | case WLAN_EID_BSS_COEX_2040: |
| 1475 | bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr + |
| 1476 | sizeof(struct ieee_types_header)); |
| 1477 | bss_entry->bss_co_2040_offset = (u16) (current_ptr + |
| 1478 | sizeof(struct ieee_types_header) - |
| 1479 | bss_entry->beacon_buf); |
| 1480 | break; |
| 1481 | case WLAN_EID_EXT_CAPABILITY: |
| 1482 | bss_entry->bcn_ext_cap = (u8 *) (current_ptr + |
| 1483 | sizeof(struct ieee_types_header)); |
| 1484 | bss_entry->ext_cap_offset = (u16) (current_ptr + |
| 1485 | sizeof(struct ieee_types_header) - |
| 1486 | bss_entry->beacon_buf); |
| 1487 | break; |
| 1488 | case WLAN_EID_OVERLAP_BSS_SCAN_PARAM: |
| 1489 | bss_entry->bcn_obss_scan = |
| 1490 | (struct ieee_types_obss_scan_param *) |
| 1491 | current_ptr; |
| 1492 | bss_entry->overlap_bss_offset = (u16) (current_ptr - |
| 1493 | bss_entry->beacon_buf); |
| 1494 | break; |
| 1495 | default: |
| 1496 | break; |
| 1497 | } |
| 1498 | |
| 1499 | current_ptr += element_len + 2; |
| 1500 | |
| 1501 | /* Need to account for IE ID and IE Len */ |
| 1502 | bytes_left_for_current_beacon -= (element_len + 2); |
| 1503 | |
| 1504 | } /* while (bytes_left_for_current_beacon > 2) */ |
| 1505 | return ret; |
| 1506 | } |
| 1507 | |
| 1508 | /* |
| 1509 | * This function adjusts the pointers used in beacon buffers to reflect |
| 1510 | * shifts. |
| 1511 | * |
| 1512 | * The memory allocated for beacon buffers is of fixed sizes where all the |
| 1513 | * saved beacons must be stored. New beacons are added in the free portion |
| 1514 | * of this memory, space permitting; while duplicate beacon buffers are |
| 1515 | * placed at the same start location. However, since duplicate beacon |
| 1516 | * buffers may not match the size of the old one, all the following buffers |
| 1517 | * in the memory must be shifted to either make space, or to fill up freed |
| 1518 | * up space. |
| 1519 | * |
| 1520 | * This function is used to update the beacon buffer pointers that are past |
| 1521 | * an existing beacon buffer that is updated with a new one of different |
| 1522 | * size. The pointers are shifted by a fixed amount, either forward or |
| 1523 | * backward. |
| 1524 | * |
| 1525 | * the following pointers in every affected beacon buffers are changed, if |
| 1526 | * present - |
| 1527 | * - WPA IE pointer |
| 1528 | * - RSN IE pointer |
| 1529 | * - WAPI IE pointer |
| 1530 | * - HT capability IE pointer |
| 1531 | * - HT information IE pointer |
| 1532 | * - BSS coexistence 20/40 IE pointer |
| 1533 | * - Extended capability IE pointer |
| 1534 | * - Overlapping BSS scan parameter IE pointer |
| 1535 | */ |
| 1536 | static void |
| 1537 | mwifiex_adjust_beacon_buffer_ptrs(struct mwifiex_private *priv, u8 advance, |
| 1538 | u8 *bcn_store, u32 rem_bcn_size, |
| 1539 | u32 num_of_ent) |
| 1540 | { |
| 1541 | struct mwifiex_adapter *adapter = priv->adapter; |
| 1542 | u32 adj_idx; |
| 1543 | for (adj_idx = 0; adj_idx < num_of_ent; adj_idx++) { |
| 1544 | if (adapter->scan_table[adj_idx].beacon_buf > bcn_store) { |
| 1545 | |
| 1546 | if (advance) |
| 1547 | adapter->scan_table[adj_idx].beacon_buf += |
| 1548 | rem_bcn_size; |
| 1549 | else |
| 1550 | adapter->scan_table[adj_idx].beacon_buf -= |
| 1551 | rem_bcn_size; |
| 1552 | |
| 1553 | if (adapter->scan_table[adj_idx].bcn_wpa_ie) |
| 1554 | adapter->scan_table[adj_idx].bcn_wpa_ie = |
| 1555 | (struct ieee_types_vendor_specific *) |
| 1556 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1557 | adapter->scan_table[adj_idx].wpa_offset); |
| 1558 | if (adapter->scan_table[adj_idx].bcn_rsn_ie) |
| 1559 | adapter->scan_table[adj_idx].bcn_rsn_ie = |
| 1560 | (struct ieee_types_generic *) |
| 1561 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1562 | adapter->scan_table[adj_idx].rsn_offset); |
| 1563 | if (adapter->scan_table[adj_idx].bcn_wapi_ie) |
| 1564 | adapter->scan_table[adj_idx].bcn_wapi_ie = |
| 1565 | (struct ieee_types_generic *) |
| 1566 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1567 | adapter->scan_table[adj_idx].wapi_offset); |
| 1568 | if (adapter->scan_table[adj_idx].bcn_ht_cap) |
| 1569 | adapter->scan_table[adj_idx].bcn_ht_cap = |
| 1570 | (struct ieee80211_ht_cap *) |
| 1571 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1572 | adapter->scan_table[adj_idx].ht_cap_offset); |
| 1573 | |
| 1574 | if (adapter->scan_table[adj_idx].bcn_ht_info) |
| 1575 | adapter->scan_table[adj_idx].bcn_ht_info = |
| 1576 | (struct ieee80211_ht_info *) |
| 1577 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1578 | adapter->scan_table[adj_idx].ht_info_offset); |
| 1579 | if (adapter->scan_table[adj_idx].bcn_bss_co_2040) |
| 1580 | adapter->scan_table[adj_idx].bcn_bss_co_2040 = |
| 1581 | (u8 *) |
| 1582 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1583 | adapter->scan_table[adj_idx].bss_co_2040_offset); |
| 1584 | if (adapter->scan_table[adj_idx].bcn_ext_cap) |
| 1585 | adapter->scan_table[adj_idx].bcn_ext_cap = |
| 1586 | (u8 *) |
| 1587 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1588 | adapter->scan_table[adj_idx].ext_cap_offset); |
| 1589 | if (adapter->scan_table[adj_idx].bcn_obss_scan) |
| 1590 | adapter->scan_table[adj_idx].bcn_obss_scan = |
| 1591 | (struct ieee_types_obss_scan_param *) |
| 1592 | (adapter->scan_table[adj_idx].beacon_buf + |
| 1593 | adapter->scan_table[adj_idx].overlap_bss_offset); |
| 1594 | } |
| 1595 | } |
| 1596 | } |
| 1597 | |
| 1598 | /* |
| 1599 | * This function updates the pointers used in beacon buffer for given bss |
| 1600 | * descriptor to reflect shifts |
| 1601 | * |
| 1602 | * Following pointers are updated |
| 1603 | * - WPA IE pointer |
| 1604 | * - RSN IE pointer |
| 1605 | * - WAPI IE pointer |
| 1606 | * - HT capability IE pointer |
| 1607 | * - HT information IE pointer |
| 1608 | * - BSS coexistence 20/40 IE pointer |
| 1609 | * - Extended capability IE pointer |
| 1610 | * - Overlapping BSS scan parameter IE pointer |
| 1611 | */ |
| 1612 | static void |
| 1613 | mwifiex_update_beacon_buffer_ptrs(struct mwifiex_bssdescriptor *beacon) |
| 1614 | { |
| 1615 | if (beacon->bcn_wpa_ie) |
| 1616 | beacon->bcn_wpa_ie = (struct ieee_types_vendor_specific *) |
| 1617 | (beacon->beacon_buf + beacon->wpa_offset); |
| 1618 | if (beacon->bcn_rsn_ie) |
| 1619 | beacon->bcn_rsn_ie = (struct ieee_types_generic *) |
| 1620 | (beacon->beacon_buf + beacon->rsn_offset); |
| 1621 | if (beacon->bcn_wapi_ie) |
| 1622 | beacon->bcn_wapi_ie = (struct ieee_types_generic *) |
| 1623 | (beacon->beacon_buf + beacon->wapi_offset); |
| 1624 | if (beacon->bcn_ht_cap) |
| 1625 | beacon->bcn_ht_cap = (struct ieee80211_ht_cap *) |
| 1626 | (beacon->beacon_buf + beacon->ht_cap_offset); |
| 1627 | if (beacon->bcn_ht_info) |
| 1628 | beacon->bcn_ht_info = (struct ieee80211_ht_info *) |
| 1629 | (beacon->beacon_buf + beacon->ht_info_offset); |
| 1630 | if (beacon->bcn_bss_co_2040) |
| 1631 | beacon->bcn_bss_co_2040 = (u8 *) (beacon->beacon_buf + |
| 1632 | beacon->bss_co_2040_offset); |
| 1633 | if (beacon->bcn_ext_cap) |
| 1634 | beacon->bcn_ext_cap = (u8 *) (beacon->beacon_buf + |
| 1635 | beacon->ext_cap_offset); |
| 1636 | if (beacon->bcn_obss_scan) |
| 1637 | beacon->bcn_obss_scan = (struct ieee_types_obss_scan_param *) |
| 1638 | (beacon->beacon_buf + beacon->overlap_bss_offset); |
| 1639 | } |
| 1640 | |
| 1641 | /* |
| 1642 | * This function stores a beacon or probe response for a BSS returned |
| 1643 | * in the scan. |
| 1644 | * |
| 1645 | * This stores a new scan response or an update for a previous scan response. |
| 1646 | * New entries need to verify that they do not exceed the total amount of |
| 1647 | * memory allocated for the table. |
| 1648 | * |
| 1649 | * Replacement entries need to take into consideration the amount of space |
| 1650 | * currently allocated for the beacon/probe response and adjust the entry |
| 1651 | * as needed. |
| 1652 | * |
| 1653 | * A small amount of extra pad (SCAN_BEACON_ENTRY_PAD) is generally reserved |
| 1654 | * for an entry in case it is a beacon since a probe response for the |
| 1655 | * network will by larger per the standard. This helps to reduce the |
| 1656 | * amount of memory copying to fit a new probe response into an entry |
| 1657 | * already occupied by a network's previously stored beacon. |
| 1658 | */ |
| 1659 | static void |
| 1660 | mwifiex_ret_802_11_scan_store_beacon(struct mwifiex_private *priv, |
| 1661 | u32 beacon_idx, u32 num_of_ent, |
| 1662 | struct mwifiex_bssdescriptor *new_beacon) |
| 1663 | { |
| 1664 | struct mwifiex_adapter *adapter = priv->adapter; |
| 1665 | u8 *bcn_store; |
| 1666 | u32 new_bcn_size; |
| 1667 | u32 old_bcn_size; |
| 1668 | u32 bcn_space; |
| 1669 | |
| 1670 | if (adapter->scan_table[beacon_idx].beacon_buf) { |
| 1671 | |
| 1672 | new_bcn_size = new_beacon->beacon_buf_size; |
| 1673 | old_bcn_size = adapter->scan_table[beacon_idx].beacon_buf_size; |
| 1674 | bcn_space = adapter->scan_table[beacon_idx].beacon_buf_size_max; |
| 1675 | bcn_store = adapter->scan_table[beacon_idx].beacon_buf; |
| 1676 | |
| 1677 | /* Set the max to be the same as current entry unless changed |
| 1678 | below */ |
| 1679 | new_beacon->beacon_buf_size_max = bcn_space; |
| 1680 | if (new_bcn_size == old_bcn_size) { |
| 1681 | /* |
| 1682 | * Beacon is the same size as the previous entry. |
| 1683 | * Replace the previous contents with the scan result |
| 1684 | */ |
| 1685 | memcpy(bcn_store, new_beacon->beacon_buf, |
| 1686 | new_beacon->beacon_buf_size); |
| 1687 | |
| 1688 | } else if (new_bcn_size <= bcn_space) { |
| 1689 | /* |
| 1690 | * New beacon size will fit in the amount of space |
| 1691 | * we have previously allocated for it |
| 1692 | */ |
| 1693 | |
| 1694 | /* Copy the new beacon buffer entry over the old one */ |
| 1695 | memcpy(bcn_store, new_beacon->beacon_buf, new_bcn_size); |
| 1696 | |
| 1697 | /* |
| 1698 | * If the old beacon size was less than the maximum |
| 1699 | * we had alloted for the entry, and the new entry |
| 1700 | * is even smaller, reset the max size to the old |
| 1701 | * beacon entry and compress the storage space |
| 1702 | * (leaving a new pad space of (old_bcn_size - |
| 1703 | * new_bcn_size). |
| 1704 | */ |
| 1705 | if (old_bcn_size < bcn_space |
| 1706 | && new_bcn_size <= old_bcn_size) { |
| 1707 | /* |
| 1708 | * Old Beacon size is smaller than the alloted |
| 1709 | * storage size. Shrink the alloted storage |
| 1710 | * space. |
| 1711 | */ |
| 1712 | dev_dbg(adapter->dev, "info: AppControl:" |
| 1713 | " smaller duplicate beacon " |
| 1714 | "(%d), old = %d, new = %d, space = %d," |
| 1715 | "left = %d\n", |
| 1716 | beacon_idx, old_bcn_size, new_bcn_size, |
| 1717 | bcn_space, |
| 1718 | (int)(sizeof(adapter->bcn_buf) - |
| 1719 | (adapter->bcn_buf_end - |
| 1720 | adapter->bcn_buf))); |
| 1721 | |
| 1722 | /* |
| 1723 | * memmove (since the memory overlaps) the |
| 1724 | * data after the beacon we just stored to the |
| 1725 | * end of the current beacon. This cleans up |
| 1726 | * any unused space the old larger beacon was |
| 1727 | * using in the buffer |
| 1728 | */ |
| 1729 | memmove(bcn_store + old_bcn_size, |
| 1730 | bcn_store + bcn_space, |
| 1731 | adapter->bcn_buf_end - (bcn_store + |
| 1732 | bcn_space)); |
| 1733 | |
| 1734 | /* |
| 1735 | * Decrement the end pointer by the difference |
| 1736 | * between the old larger size and the new |
| 1737 | * smaller size since we are using less space |
| 1738 | * due to the new beacon being smaller |
| 1739 | */ |
| 1740 | adapter->bcn_buf_end -= |
| 1741 | (bcn_space - old_bcn_size); |
| 1742 | |
| 1743 | /* Set the maximum storage size to the old |
| 1744 | beacon size */ |
| 1745 | new_beacon->beacon_buf_size_max = old_bcn_size; |
| 1746 | |
| 1747 | /* Adjust beacon buffer pointers that are past |
| 1748 | the current */ |
| 1749 | mwifiex_adjust_beacon_buffer_ptrs(priv, 0, |
| 1750 | bcn_store, (bcn_space - old_bcn_size), |
| 1751 | num_of_ent); |
| 1752 | } |
| 1753 | } else if (adapter->bcn_buf_end + (new_bcn_size - bcn_space) |
| 1754 | < (adapter->bcn_buf + sizeof(adapter->bcn_buf))) { |
| 1755 | /* |
| 1756 | * Beacon is larger than space previously allocated |
| 1757 | * (bcn_space) and there is enough space left in the |
| 1758 | * beaconBuffer to store the additional data |
| 1759 | */ |
| 1760 | dev_dbg(adapter->dev, "info: AppControl:" |
| 1761 | " larger duplicate beacon (%d), " |
| 1762 | "old = %d, new = %d, space = %d, left = %d\n", |
| 1763 | beacon_idx, old_bcn_size, new_bcn_size, |
| 1764 | bcn_space, |
| 1765 | (int)(sizeof(adapter->bcn_buf) - |
| 1766 | (adapter->bcn_buf_end - |
| 1767 | adapter->bcn_buf))); |
| 1768 | |
| 1769 | /* |
| 1770 | * memmove (since the memory overlaps) the data |
| 1771 | * after the beacon we just stored to the end of |
| 1772 | * the current beacon. This moves the data for |
| 1773 | * the beacons after this further in memory to |
| 1774 | * make space for the new larger beacon we are |
| 1775 | * about to copy in. |
| 1776 | */ |
| 1777 | memmove(bcn_store + new_bcn_size, |
| 1778 | bcn_store + bcn_space, |
| 1779 | adapter->bcn_buf_end - (bcn_store + bcn_space)); |
| 1780 | |
| 1781 | /* Copy the new beacon buffer entry over the old one */ |
| 1782 | memcpy(bcn_store, new_beacon->beacon_buf, new_bcn_size); |
| 1783 | |
| 1784 | /* Move the beacon end pointer by the amount of new |
| 1785 | beacon data we are adding */ |
| 1786 | adapter->bcn_buf_end += (new_bcn_size - bcn_space); |
| 1787 | |
| 1788 | /* |
| 1789 | * This entry is bigger than the alloted max space |
| 1790 | * previously reserved. Increase the max space to |
| 1791 | * be equal to the new beacon size |
| 1792 | */ |
| 1793 | new_beacon->beacon_buf_size_max = new_bcn_size; |
| 1794 | |
| 1795 | /* Adjust beacon buffer pointers that are past the |
| 1796 | current */ |
| 1797 | mwifiex_adjust_beacon_buffer_ptrs(priv, 1, bcn_store, |
| 1798 | (new_bcn_size - bcn_space), |
| 1799 | num_of_ent); |
| 1800 | } else { |
| 1801 | /* |
| 1802 | * Beacon is larger than the previously allocated space, |
| 1803 | * but there is not enough free space to store the |
| 1804 | * additional data. |
| 1805 | */ |
| 1806 | dev_err(adapter->dev, "AppControl: larger duplicate " |
| 1807 | " beacon (%d), old = %d new = %d, space = %d," |
| 1808 | " left = %d\n", beacon_idx, old_bcn_size, |
| 1809 | new_bcn_size, bcn_space, |
| 1810 | (int)(sizeof(adapter->bcn_buf) - |
| 1811 | (adapter->bcn_buf_end - adapter->bcn_buf))); |
| 1812 | |
| 1813 | /* Storage failure, keep old beacon intact */ |
| 1814 | new_beacon->beacon_buf_size = old_bcn_size; |
| 1815 | if (new_beacon->bcn_wpa_ie) |
| 1816 | new_beacon->wpa_offset = |
| 1817 | adapter->scan_table[beacon_idx]. |
| 1818 | wpa_offset; |
| 1819 | if (new_beacon->bcn_rsn_ie) |
| 1820 | new_beacon->rsn_offset = |
| 1821 | adapter->scan_table[beacon_idx]. |
| 1822 | rsn_offset; |
| 1823 | if (new_beacon->bcn_wapi_ie) |
| 1824 | new_beacon->wapi_offset = |
| 1825 | adapter->scan_table[beacon_idx]. |
| 1826 | wapi_offset; |
| 1827 | if (new_beacon->bcn_ht_cap) |
| 1828 | new_beacon->ht_cap_offset = |
| 1829 | adapter->scan_table[beacon_idx]. |
| 1830 | ht_cap_offset; |
| 1831 | if (new_beacon->bcn_ht_info) |
| 1832 | new_beacon->ht_info_offset = |
| 1833 | adapter->scan_table[beacon_idx]. |
| 1834 | ht_info_offset; |
| 1835 | if (new_beacon->bcn_bss_co_2040) |
| 1836 | new_beacon->bss_co_2040_offset = |
| 1837 | adapter->scan_table[beacon_idx]. |
| 1838 | bss_co_2040_offset; |
| 1839 | if (new_beacon->bcn_ext_cap) |
| 1840 | new_beacon->ext_cap_offset = |
| 1841 | adapter->scan_table[beacon_idx]. |
| 1842 | ext_cap_offset; |
| 1843 | if (new_beacon->bcn_obss_scan) |
| 1844 | new_beacon->overlap_bss_offset = |
| 1845 | adapter->scan_table[beacon_idx]. |
| 1846 | overlap_bss_offset; |
| 1847 | } |
| 1848 | /* Point the new entry to its permanent storage space */ |
| 1849 | new_beacon->beacon_buf = bcn_store; |
| 1850 | mwifiex_update_beacon_buffer_ptrs(new_beacon); |
| 1851 | } else { |
| 1852 | /* |
| 1853 | * No existing beacon data exists for this entry, check to see |
| 1854 | * if we can fit it in the remaining space |
| 1855 | */ |
| 1856 | if (adapter->bcn_buf_end + new_beacon->beacon_buf_size + |
| 1857 | SCAN_BEACON_ENTRY_PAD < (adapter->bcn_buf + |
| 1858 | sizeof(adapter->bcn_buf))) { |
| 1859 | |
| 1860 | /* |
| 1861 | * Copy the beacon buffer data from the local entry to |
| 1862 | * the adapter dev struct buffer space used to store |
| 1863 | * the raw beacon data for each entry in the scan table |
| 1864 | */ |
| 1865 | memcpy(adapter->bcn_buf_end, new_beacon->beacon_buf, |
| 1866 | new_beacon->beacon_buf_size); |
| 1867 | |
| 1868 | /* Update the beacon ptr to point to the table save |
| 1869 | area */ |
| 1870 | new_beacon->beacon_buf = adapter->bcn_buf_end; |
| 1871 | new_beacon->beacon_buf_size_max = |
| 1872 | (new_beacon->beacon_buf_size + |
| 1873 | SCAN_BEACON_ENTRY_PAD); |
| 1874 | |
| 1875 | mwifiex_update_beacon_buffer_ptrs(new_beacon); |
| 1876 | |
| 1877 | /* Increment the end pointer by the size reserved */ |
| 1878 | adapter->bcn_buf_end += new_beacon->beacon_buf_size_max; |
| 1879 | |
| 1880 | dev_dbg(adapter->dev, "info: AppControl: beacon[%02d]" |
| 1881 | " sz=%03d, used = %04d, left = %04d\n", |
| 1882 | beacon_idx, |
| 1883 | new_beacon->beacon_buf_size, |
| 1884 | (int)(adapter->bcn_buf_end - adapter->bcn_buf), |
| 1885 | (int)(sizeof(adapter->bcn_buf) - |
| 1886 | (adapter->bcn_buf_end - |
| 1887 | adapter->bcn_buf))); |
| 1888 | } else { |
| 1889 | /* No space for new beacon */ |
| 1890 | dev_dbg(adapter->dev, "info: AppControl: no space for" |
| 1891 | " beacon (%d): %pM sz=%03d, left=%03d\n", |
| 1892 | beacon_idx, new_beacon->mac_address, |
| 1893 | new_beacon->beacon_buf_size, |
| 1894 | (int)(sizeof(adapter->bcn_buf) - |
| 1895 | (adapter->bcn_buf_end - |
| 1896 | adapter->bcn_buf))); |
| 1897 | |
| 1898 | /* Storage failure; clear storage records for this |
| 1899 | bcn */ |
| 1900 | new_beacon->beacon_buf = NULL; |
| 1901 | new_beacon->beacon_buf_size = 0; |
| 1902 | new_beacon->beacon_buf_size_max = 0; |
| 1903 | new_beacon->bcn_wpa_ie = NULL; |
| 1904 | new_beacon->wpa_offset = 0; |
| 1905 | new_beacon->bcn_rsn_ie = NULL; |
| 1906 | new_beacon->rsn_offset = 0; |
| 1907 | new_beacon->bcn_wapi_ie = NULL; |
| 1908 | new_beacon->wapi_offset = 0; |
| 1909 | new_beacon->bcn_ht_cap = NULL; |
| 1910 | new_beacon->ht_cap_offset = 0; |
| 1911 | new_beacon->bcn_ht_info = NULL; |
| 1912 | new_beacon->ht_info_offset = 0; |
| 1913 | new_beacon->bcn_bss_co_2040 = NULL; |
| 1914 | new_beacon->bss_co_2040_offset = 0; |
| 1915 | new_beacon->bcn_ext_cap = NULL; |
| 1916 | new_beacon->ext_cap_offset = 0; |
| 1917 | new_beacon->bcn_obss_scan = NULL; |
| 1918 | new_beacon->overlap_bss_offset = 0; |
| 1919 | } |
| 1920 | } |
| 1921 | } |
| 1922 | |
| 1923 | /* |
| 1924 | * This function restores a beacon buffer of the current BSS descriptor. |
| 1925 | */ |
| 1926 | static void mwifiex_restore_curr_bcn(struct mwifiex_private *priv) |
| 1927 | { |
| 1928 | struct mwifiex_adapter *adapter = priv->adapter; |
| 1929 | struct mwifiex_bssdescriptor *curr_bss = |
| 1930 | &priv->curr_bss_params.bss_descriptor; |
| 1931 | unsigned long flags; |
| 1932 | |
| 1933 | if (priv->curr_bcn_buf && |
| 1934 | ((adapter->bcn_buf_end + priv->curr_bcn_size) < |
| 1935 | (adapter->bcn_buf + sizeof(adapter->bcn_buf)))) { |
| 1936 | spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags); |
| 1937 | |
| 1938 | /* restore the current beacon buffer */ |
| 1939 | memcpy(adapter->bcn_buf_end, priv->curr_bcn_buf, |
| 1940 | priv->curr_bcn_size); |
| 1941 | curr_bss->beacon_buf = adapter->bcn_buf_end; |
| 1942 | curr_bss->beacon_buf_size = priv->curr_bcn_size; |
| 1943 | adapter->bcn_buf_end += priv->curr_bcn_size; |
| 1944 | |
| 1945 | /* adjust the pointers in the current BSS descriptor */ |
| 1946 | if (curr_bss->bcn_wpa_ie) |
| 1947 | curr_bss->bcn_wpa_ie = |
| 1948 | (struct ieee_types_vendor_specific *) |
| 1949 | (curr_bss->beacon_buf + |
| 1950 | curr_bss->wpa_offset); |
| 1951 | |
| 1952 | if (curr_bss->bcn_rsn_ie) |
| 1953 | curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) |
| 1954 | (curr_bss->beacon_buf + |
| 1955 | curr_bss->rsn_offset); |
| 1956 | |
| 1957 | if (curr_bss->bcn_ht_cap) |
| 1958 | curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) |
| 1959 | (curr_bss->beacon_buf + |
| 1960 | curr_bss->ht_cap_offset); |
| 1961 | |
| 1962 | if (curr_bss->bcn_ht_info) |
| 1963 | curr_bss->bcn_ht_info = (struct ieee80211_ht_info *) |
| 1964 | (curr_bss->beacon_buf + |
| 1965 | curr_bss->ht_info_offset); |
| 1966 | |
| 1967 | if (curr_bss->bcn_bss_co_2040) |
| 1968 | curr_bss->bcn_bss_co_2040 = |
| 1969 | (u8 *) (curr_bss->beacon_buf + |
| 1970 | curr_bss->bss_co_2040_offset); |
| 1971 | |
| 1972 | if (curr_bss->bcn_ext_cap) |
| 1973 | curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf + |
| 1974 | curr_bss->ext_cap_offset); |
| 1975 | |
| 1976 | if (curr_bss->bcn_obss_scan) |
| 1977 | curr_bss->bcn_obss_scan = |
| 1978 | (struct ieee_types_obss_scan_param *) |
| 1979 | (curr_bss->beacon_buf + |
| 1980 | curr_bss->overlap_bss_offset); |
| 1981 | |
| 1982 | spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags); |
| 1983 | |
| 1984 | dev_dbg(adapter->dev, "info: current beacon restored %d\n", |
| 1985 | priv->curr_bcn_size); |
| 1986 | } else { |
| 1987 | dev_warn(adapter->dev, |
| 1988 | "curr_bcn_buf not saved or bcn_buf has no space\n"); |
| 1989 | } |
| 1990 | } |
| 1991 | |
| 1992 | /* |
| 1993 | * This function post processes the scan table after a new scan command has |
| 1994 | * completed. |
| 1995 | * |
| 1996 | * It inspects each entry of the scan table and tries to find an entry that |
| 1997 | * matches with our current associated/joined network from the scan. If |
| 1998 | * one is found, the stored copy of the BSS descriptor of our current network |
| 1999 | * is updated. |
| 2000 | * |
| 2001 | * It also debug dumps the current scan table contents after processing is over. |
| 2002 | */ |
| 2003 | static void |
| 2004 | mwifiex_process_scan_results(struct mwifiex_private *priv) |
| 2005 | { |
| 2006 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2007 | s32 j; |
| 2008 | u32 i; |
| 2009 | unsigned long flags; |
| 2010 | |
| 2011 | if (priv->media_connected) { |
| 2012 | |
| 2013 | j = mwifiex_find_ssid_in_list(priv, &priv->curr_bss_params. |
| 2014 | bss_descriptor.ssid, |
| 2015 | priv->curr_bss_params. |
| 2016 | bss_descriptor.mac_address, |
| 2017 | priv->bss_mode); |
| 2018 | |
| 2019 | if (j >= 0) { |
| 2020 | spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags); |
| 2021 | priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL; |
| 2022 | priv->curr_bss_params.bss_descriptor.wpa_offset = 0; |
| 2023 | priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL; |
| 2024 | priv->curr_bss_params.bss_descriptor.rsn_offset = 0; |
| 2025 | priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL; |
| 2026 | priv->curr_bss_params.bss_descriptor.wapi_offset = 0; |
| 2027 | priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL; |
| 2028 | priv->curr_bss_params.bss_descriptor.ht_cap_offset = |
| 2029 | 0; |
| 2030 | priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL; |
| 2031 | priv->curr_bss_params.bss_descriptor.ht_info_offset = |
| 2032 | 0; |
| 2033 | priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 = |
| 2034 | NULL; |
| 2035 | priv->curr_bss_params.bss_descriptor. |
| 2036 | bss_co_2040_offset = 0; |
| 2037 | priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL; |
| 2038 | priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0; |
| 2039 | priv->curr_bss_params.bss_descriptor. |
| 2040 | bcn_obss_scan = NULL; |
| 2041 | priv->curr_bss_params.bss_descriptor. |
| 2042 | overlap_bss_offset = 0; |
| 2043 | priv->curr_bss_params.bss_descriptor.beacon_buf = NULL; |
| 2044 | priv->curr_bss_params.bss_descriptor.beacon_buf_size = |
| 2045 | 0; |
| 2046 | priv->curr_bss_params.bss_descriptor. |
| 2047 | beacon_buf_size_max = 0; |
| 2048 | |
| 2049 | dev_dbg(adapter->dev, "info: Found current ssid/bssid" |
| 2050 | " in list @ index #%d\n", j); |
| 2051 | /* Make a copy of current BSSID descriptor */ |
| 2052 | memcpy(&priv->curr_bss_params.bss_descriptor, |
| 2053 | &adapter->scan_table[j], |
| 2054 | sizeof(priv->curr_bss_params.bss_descriptor)); |
| 2055 | |
| 2056 | mwifiex_save_curr_bcn(priv); |
| 2057 | spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags); |
| 2058 | |
| 2059 | } else { |
| 2060 | mwifiex_restore_curr_bcn(priv); |
| 2061 | } |
| 2062 | } |
| 2063 | |
| 2064 | for (i = 0; i < adapter->num_in_scan_table; i++) |
| 2065 | dev_dbg(adapter->dev, "info: scan:(%02d) %pM " |
| 2066 | "RSSI[%03d], SSID[%s]\n", |
| 2067 | i, adapter->scan_table[i].mac_address, |
| 2068 | (s32) adapter->scan_table[i].rssi, |
| 2069 | adapter->scan_table[i].ssid.ssid); |
| 2070 | } |
| 2071 | |
| 2072 | /* |
| 2073 | * This function converts radio type scan parameter to a band configuration |
| 2074 | * to be used in join command. |
| 2075 | */ |
| 2076 | static u8 |
| 2077 | mwifiex_radio_type_to_band(u8 radio_type) |
| 2078 | { |
| 2079 | u8 ret_band; |
| 2080 | |
| 2081 | switch (radio_type) { |
| 2082 | case HostCmd_SCAN_RADIO_TYPE_A: |
| 2083 | ret_band = BAND_A; |
| 2084 | break; |
| 2085 | case HostCmd_SCAN_RADIO_TYPE_BG: |
| 2086 | default: |
| 2087 | ret_band = BAND_G; |
| 2088 | break; |
| 2089 | } |
| 2090 | |
| 2091 | return ret_band; |
| 2092 | } |
| 2093 | |
| 2094 | /* |
| 2095 | * This function deletes a specific indexed entry from the scan table. |
| 2096 | * |
| 2097 | * This also compacts the remaining entries and adjusts any buffering |
| 2098 | * of beacon/probe response data if needed. |
| 2099 | */ |
| 2100 | static void |
| 2101 | mwifiex_scan_delete_table_entry(struct mwifiex_private *priv, s32 table_idx) |
| 2102 | { |
| 2103 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2104 | u32 del_idx; |
| 2105 | u32 beacon_buf_adj; |
| 2106 | u8 *beacon_buf; |
| 2107 | |
| 2108 | /* |
| 2109 | * Shift the saved beacon buffer data for the scan table back over the |
| 2110 | * entry being removed. Update the end of buffer pointer. Save the |
| 2111 | * deleted buffer allocation size for pointer adjustments for entries |
| 2112 | * compacted after the deleted index. |
| 2113 | */ |
| 2114 | beacon_buf_adj = adapter->scan_table[table_idx].beacon_buf_size_max; |
| 2115 | |
| 2116 | dev_dbg(adapter->dev, "info: Scan: Delete Entry %d, beacon buffer " |
| 2117 | "removal = %d bytes\n", table_idx, beacon_buf_adj); |
| 2118 | |
| 2119 | /* Check if the table entry had storage allocated for its beacon */ |
| 2120 | if (beacon_buf_adj) { |
| 2121 | beacon_buf = adapter->scan_table[table_idx].beacon_buf; |
| 2122 | |
| 2123 | /* |
| 2124 | * Remove the entry's buffer space, decrement the table end |
| 2125 | * pointer by the amount we are removing |
| 2126 | */ |
| 2127 | adapter->bcn_buf_end -= beacon_buf_adj; |
| 2128 | |
| 2129 | dev_dbg(adapter->dev, "info: scan: delete entry %d," |
| 2130 | " compact data: %p <- %p (sz = %d)\n", |
| 2131 | table_idx, beacon_buf, |
| 2132 | beacon_buf + beacon_buf_adj, |
| 2133 | (int)(adapter->bcn_buf_end - beacon_buf)); |
| 2134 | |
| 2135 | /* |
| 2136 | * Compact data storage. Copy all data after the deleted |
| 2137 | * entry's end address (beacon_buf + beacon_buf_adj) back |
| 2138 | * to the original start address (beacon_buf). |
| 2139 | * |
| 2140 | * Scan table entries affected by the move will have their |
| 2141 | * entry pointer adjusted below. |
| 2142 | * |
| 2143 | * Use memmove since the dest/src memory regions overlap. |
| 2144 | */ |
| 2145 | memmove(beacon_buf, beacon_buf + beacon_buf_adj, |
| 2146 | adapter->bcn_buf_end - beacon_buf); |
| 2147 | } |
| 2148 | |
| 2149 | dev_dbg(adapter->dev, |
| 2150 | "info: Scan: Delete Entry %d, num_in_scan_table = %d\n", |
| 2151 | table_idx, adapter->num_in_scan_table); |
| 2152 | |
| 2153 | /* Shift all of the entries after the table_idx back by one, compacting |
| 2154 | the table and removing the requested entry */ |
| 2155 | for (del_idx = table_idx; (del_idx + 1) < adapter->num_in_scan_table; |
| 2156 | del_idx++) { |
| 2157 | /* Copy the next entry over this one */ |
| 2158 | memcpy(adapter->scan_table + del_idx, |
| 2159 | adapter->scan_table + del_idx + 1, |
| 2160 | sizeof(struct mwifiex_bssdescriptor)); |
| 2161 | |
| 2162 | /* |
| 2163 | * Adjust this entry's pointer to its beacon buffer based on |
| 2164 | * the removed/compacted entry from the deleted index. Don't |
| 2165 | * decrement if the buffer pointer is NULL (no data stored for |
| 2166 | * this entry). |
| 2167 | */ |
| 2168 | if (adapter->scan_table[del_idx].beacon_buf) { |
| 2169 | adapter->scan_table[del_idx].beacon_buf -= |
| 2170 | beacon_buf_adj; |
| 2171 | if (adapter->scan_table[del_idx].bcn_wpa_ie) |
| 2172 | adapter->scan_table[del_idx].bcn_wpa_ie = |
| 2173 | (struct ieee_types_vendor_specific *) |
| 2174 | (adapter->scan_table[del_idx]. |
| 2175 | beacon_buf + |
| 2176 | adapter->scan_table[del_idx]. |
| 2177 | wpa_offset); |
| 2178 | if (adapter->scan_table[del_idx].bcn_rsn_ie) |
| 2179 | adapter->scan_table[del_idx].bcn_rsn_ie = |
| 2180 | (struct ieee_types_generic *) |
| 2181 | (adapter->scan_table[del_idx]. |
| 2182 | beacon_buf + |
| 2183 | adapter->scan_table[del_idx]. |
| 2184 | rsn_offset); |
| 2185 | if (adapter->scan_table[del_idx].bcn_wapi_ie) |
| 2186 | adapter->scan_table[del_idx].bcn_wapi_ie = |
| 2187 | (struct ieee_types_generic *) |
| 2188 | (adapter->scan_table[del_idx].beacon_buf |
| 2189 | + adapter->scan_table[del_idx]. |
| 2190 | wapi_offset); |
| 2191 | if (adapter->scan_table[del_idx].bcn_ht_cap) |
| 2192 | adapter->scan_table[del_idx].bcn_ht_cap = |
| 2193 | (struct ieee80211_ht_cap *) |
| 2194 | (adapter->scan_table[del_idx].beacon_buf |
| 2195 | + adapter->scan_table[del_idx]. |
| 2196 | ht_cap_offset); |
| 2197 | |
| 2198 | if (adapter->scan_table[del_idx].bcn_ht_info) |
| 2199 | adapter->scan_table[del_idx].bcn_ht_info = |
| 2200 | (struct ieee80211_ht_info *) |
| 2201 | (adapter->scan_table[del_idx].beacon_buf |
| 2202 | + adapter->scan_table[del_idx]. |
| 2203 | ht_info_offset); |
| 2204 | if (adapter->scan_table[del_idx].bcn_bss_co_2040) |
| 2205 | adapter->scan_table[del_idx].bcn_bss_co_2040 = |
| 2206 | (u8 *) |
| 2207 | (adapter->scan_table[del_idx].beacon_buf |
| 2208 | + adapter->scan_table[del_idx]. |
| 2209 | bss_co_2040_offset); |
| 2210 | if (adapter->scan_table[del_idx].bcn_ext_cap) |
| 2211 | adapter->scan_table[del_idx].bcn_ext_cap = |
| 2212 | (u8 *) |
| 2213 | (adapter->scan_table[del_idx].beacon_buf |
| 2214 | + adapter->scan_table[del_idx]. |
| 2215 | ext_cap_offset); |
| 2216 | if (adapter->scan_table[del_idx].bcn_obss_scan) |
| 2217 | adapter->scan_table[del_idx]. |
| 2218 | bcn_obss_scan = |
| 2219 | (struct ieee_types_obss_scan_param *) |
| 2220 | (adapter->scan_table[del_idx].beacon_buf |
| 2221 | + adapter->scan_table[del_idx]. |
| 2222 | overlap_bss_offset); |
| 2223 | } |
| 2224 | } |
| 2225 | |
| 2226 | /* The last entry is invalid now that it has been deleted or moved |
| 2227 | back */ |
| 2228 | memset(adapter->scan_table + adapter->num_in_scan_table - 1, |
| 2229 | 0x00, sizeof(struct mwifiex_bssdescriptor)); |
| 2230 | |
| 2231 | adapter->num_in_scan_table--; |
| 2232 | } |
| 2233 | |
| 2234 | /* |
| 2235 | * This function deletes all occurrences of a given SSID from the scan table. |
| 2236 | * |
| 2237 | * This iterates through the scan table and deletes all entries that match |
| 2238 | * the given SSID. It also compacts the remaining scan table entries. |
| 2239 | */ |
| 2240 | static int |
| 2241 | mwifiex_scan_delete_ssid_table_entry(struct mwifiex_private *priv, |
| 2242 | struct mwifiex_802_11_ssid *del_ssid) |
| 2243 | { |
| 2244 | int ret = -1; |
| 2245 | s32 table_idx; |
| 2246 | |
| 2247 | dev_dbg(priv->adapter->dev, "info: scan: delete ssid entry: %-32s\n", |
| 2248 | del_ssid->ssid); |
| 2249 | |
| 2250 | /* If the requested SSID is found in the table, delete it. Then keep |
| 2251 | searching the table for multiple entires for the SSID until no |
| 2252 | more are found */ |
| 2253 | while ((table_idx = mwifiex_find_ssid_in_list(priv, del_ssid, NULL, |
| 2254 | MWIFIEX_BSS_MODE_AUTO)) >= |
| 2255 | 0) { |
| 2256 | dev_dbg(priv->adapter->dev, |
| 2257 | "info: Scan: Delete SSID Entry: Found Idx = %d\n", |
| 2258 | table_idx); |
| 2259 | ret = 0; |
| 2260 | mwifiex_scan_delete_table_entry(priv, table_idx); |
| 2261 | } |
| 2262 | |
| 2263 | return ret; |
| 2264 | } |
| 2265 | |
| 2266 | /* |
| 2267 | * This is an internal function used to start a scan based on an input |
| 2268 | * configuration. |
| 2269 | * |
| 2270 | * This uses the input user scan configuration information when provided in |
| 2271 | * order to send the appropriate scan commands to firmware to populate or |
| 2272 | * update the internal driver scan table. |
| 2273 | */ |
| 2274 | int mwifiex_scan_networks(struct mwifiex_private *priv, |
| 2275 | void *wait_buf, u16 action, |
| 2276 | const struct mwifiex_user_scan_cfg *user_scan_in, |
| 2277 | struct mwifiex_scan_resp *scan_resp) |
| 2278 | { |
| 2279 | int ret = 0; |
| 2280 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2281 | struct cmd_ctrl_node *cmd_node = NULL; |
| 2282 | union mwifiex_scan_cmd_config_tlv *scan_cfg_out = NULL; |
| 2283 | struct mwifiex_ie_types_chan_list_param_set *chan_list_out; |
| 2284 | u32 buf_size; |
| 2285 | struct mwifiex_chan_scan_param_set *scan_chan_list; |
| 2286 | u8 keep_previous_scan; |
| 2287 | u8 filtered_scan; |
| 2288 | u8 scan_current_chan_only; |
| 2289 | u8 max_chan_per_scan; |
| 2290 | unsigned long flags; |
| 2291 | |
| 2292 | if (action == HostCmd_ACT_GEN_GET) { |
| 2293 | if (scan_resp) { |
| 2294 | scan_resp->scan_table = (u8 *) adapter->scan_table; |
| 2295 | scan_resp->num_in_scan_table = |
| 2296 | adapter->num_in_scan_table; |
| 2297 | } else { |
| 2298 | ret = -1; |
| 2299 | } |
| 2300 | return ret; |
| 2301 | } |
| 2302 | |
| 2303 | if (adapter->scan_processing && action == HostCmd_ACT_GEN_SET) { |
| 2304 | dev_dbg(adapter->dev, "cmd: Scan already in process...\n"); |
| 2305 | return ret; |
| 2306 | } |
| 2307 | |
| 2308 | spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); |
| 2309 | adapter->scan_processing = true; |
| 2310 | spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); |
| 2311 | |
| 2312 | if (priv->scan_block && action == HostCmd_ACT_GEN_SET) { |
| 2313 | dev_dbg(adapter->dev, |
| 2314 | "cmd: Scan is blocked during association...\n"); |
| 2315 | return ret; |
| 2316 | } |
| 2317 | |
| 2318 | scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), |
| 2319 | GFP_KERNEL); |
| 2320 | if (!scan_cfg_out) { |
| 2321 | dev_err(adapter->dev, "failed to alloc scan_cfg_out\n"); |
| 2322 | return -1; |
| 2323 | } |
| 2324 | |
| 2325 | buf_size = sizeof(struct mwifiex_chan_scan_param_set) * |
| 2326 | MWIFIEX_USER_SCAN_CHAN_MAX; |
| 2327 | scan_chan_list = kzalloc(buf_size, GFP_KERNEL); |
| 2328 | if (!scan_chan_list) { |
| 2329 | dev_err(adapter->dev, "failed to alloc scan_chan_list\n"); |
| 2330 | kfree(scan_cfg_out); |
| 2331 | return -1; |
| 2332 | } |
| 2333 | |
| 2334 | keep_previous_scan = false; |
| 2335 | |
| 2336 | mwifiex_scan_setup_scan_config(priv, user_scan_in, |
| 2337 | &scan_cfg_out->config, &chan_list_out, |
| 2338 | scan_chan_list, &max_chan_per_scan, |
| 2339 | &filtered_scan, &scan_current_chan_only); |
| 2340 | |
| 2341 | if (user_scan_in) |
| 2342 | keep_previous_scan = user_scan_in->keep_previous_scan; |
| 2343 | |
| 2344 | |
| 2345 | if (!keep_previous_scan) { |
| 2346 | memset(adapter->scan_table, 0x00, |
| 2347 | sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP); |
| 2348 | adapter->num_in_scan_table = 0; |
| 2349 | adapter->bcn_buf_end = adapter->bcn_buf; |
| 2350 | } |
| 2351 | |
| 2352 | ret = mwifiex_scan_channel_list(priv, wait_buf, max_chan_per_scan, |
| 2353 | filtered_scan, &scan_cfg_out->config, |
| 2354 | chan_list_out, scan_chan_list); |
| 2355 | |
| 2356 | /* Get scan command from scan_pending_q and put to cmd_pending_q */ |
| 2357 | if (!ret) { |
| 2358 | spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); |
| 2359 | if (!list_empty(&adapter->scan_pending_q)) { |
| 2360 | cmd_node = list_first_entry(&adapter->scan_pending_q, |
| 2361 | struct cmd_ctrl_node, list); |
| 2362 | list_del(&cmd_node->list); |
| 2363 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, |
| 2364 | flags); |
| 2365 | mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, |
| 2366 | true); |
| 2367 | } else { |
| 2368 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, |
| 2369 | flags); |
| 2370 | } |
| 2371 | ret = -EINPROGRESS; |
| 2372 | } else { |
| 2373 | spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); |
| 2374 | adapter->scan_processing = true; |
| 2375 | spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); |
| 2376 | } |
| 2377 | |
| 2378 | kfree(scan_cfg_out); |
| 2379 | kfree(scan_chan_list); |
| 2380 | return ret; |
| 2381 | } |
| 2382 | |
| 2383 | /* |
| 2384 | * This function prepares a scan command to be sent to the firmware. |
| 2385 | * |
| 2386 | * This uses the scan command configuration sent to the command processing |
| 2387 | * module in command preparation stage to configure a scan command structure |
| 2388 | * to send to firmware. |
| 2389 | * |
| 2390 | * The fixed fields specifying the BSS type and BSSID filters as well as a |
| 2391 | * variable number/length of TLVs are sent in the command to firmware. |
| 2392 | * |
| 2393 | * Preparation also includes - |
| 2394 | * - Setting command ID, and proper size |
| 2395 | * - Ensuring correct endian-ness |
| 2396 | */ |
| 2397 | int mwifiex_cmd_802_11_scan(struct mwifiex_private *priv, |
| 2398 | struct host_cmd_ds_command *cmd, void *data_buf) |
| 2399 | { |
| 2400 | struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; |
| 2401 | struct mwifiex_scan_cmd_config *scan_cfg; |
| 2402 | |
| 2403 | scan_cfg = (struct mwifiex_scan_cmd_config *) data_buf; |
| 2404 | |
| 2405 | /* Set fixed field variables in scan command */ |
| 2406 | scan_cmd->bss_mode = scan_cfg->bss_mode; |
| 2407 | memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, |
| 2408 | sizeof(scan_cmd->bssid)); |
| 2409 | memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); |
| 2410 | |
| 2411 | cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); |
| 2412 | |
| 2413 | /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ |
| 2414 | cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) |
| 2415 | + sizeof(scan_cmd->bssid) |
| 2416 | + scan_cfg->tlv_buf_len + S_DS_GEN)); |
| 2417 | |
| 2418 | return 0; |
| 2419 | } |
| 2420 | |
| 2421 | /* |
| 2422 | * This function handles the command response of scan. |
| 2423 | * |
| 2424 | * The response buffer for the scan command has the following |
| 2425 | * memory layout: |
| 2426 | * |
| 2427 | * .-------------------------------------------------------------. |
| 2428 | * | Header (4 * sizeof(t_u16)): Standard command response hdr | |
| 2429 | * .-------------------------------------------------------------. |
| 2430 | * | BufSize (t_u16) : sizeof the BSS Description data | |
| 2431 | * .-------------------------------------------------------------. |
| 2432 | * | NumOfSet (t_u8) : Number of BSS Descs returned | |
| 2433 | * .-------------------------------------------------------------. |
| 2434 | * | BSSDescription data (variable, size given in BufSize) | |
| 2435 | * .-------------------------------------------------------------. |
| 2436 | * | TLV data (variable, size calculated using Header->Size, | |
| 2437 | * | BufSize and sizeof the fixed fields above) | |
| 2438 | * .-------------------------------------------------------------. |
| 2439 | */ |
| 2440 | int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, |
| 2441 | struct host_cmd_ds_command *resp, void *wq_buf) |
| 2442 | { |
| 2443 | int ret = 0; |
| 2444 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2445 | struct mwifiex_wait_queue *wait_queue = NULL; |
| 2446 | struct cmd_ctrl_node *cmd_node = NULL; |
| 2447 | struct host_cmd_ds_802_11_scan_rsp *scan_rsp = NULL; |
| 2448 | struct mwifiex_bssdescriptor *bss_new_entry = NULL; |
| 2449 | struct mwifiex_ie_types_data *tlv_data; |
| 2450 | struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; |
| 2451 | u8 *bss_info; |
| 2452 | u32 scan_resp_size; |
| 2453 | u32 bytes_left; |
| 2454 | u32 num_in_table; |
| 2455 | u32 bss_idx; |
| 2456 | u32 idx; |
| 2457 | u32 tlv_buf_size; |
| 2458 | long long tsf_val; |
| 2459 | struct mwifiex_chan_freq_power *cfp; |
| 2460 | struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; |
| 2461 | struct chan_band_param_set *chan_band; |
| 2462 | u8 band; |
| 2463 | u8 is_bgscan_resp; |
| 2464 | unsigned long flags; |
| 2465 | |
| 2466 | is_bgscan_resp = (le16_to_cpu(resp->command) |
| 2467 | == HostCmd_CMD_802_11_BG_SCAN_QUERY); |
| 2468 | if (is_bgscan_resp) |
| 2469 | scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; |
| 2470 | else |
| 2471 | scan_rsp = &resp->params.scan_resp; |
| 2472 | |
| 2473 | |
| 2474 | if (scan_rsp->number_of_sets > IW_MAX_AP) { |
| 2475 | dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n", |
| 2476 | scan_rsp->number_of_sets); |
| 2477 | ret = -1; |
| 2478 | goto done; |
| 2479 | } |
| 2480 | |
| 2481 | bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); |
| 2482 | dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n", |
| 2483 | bytes_left); |
| 2484 | |
| 2485 | scan_resp_size = le16_to_cpu(resp->size); |
| 2486 | |
| 2487 | dev_dbg(adapter->dev, |
| 2488 | "info: SCAN_RESP: returned %d APs before parsing\n", |
| 2489 | scan_rsp->number_of_sets); |
| 2490 | |
| 2491 | num_in_table = adapter->num_in_scan_table; |
| 2492 | bss_info = scan_rsp->bss_desc_and_tlv_buffer; |
| 2493 | |
| 2494 | /* |
| 2495 | * The size of the TLV buffer is equal to the entire command response |
| 2496 | * size (scan_resp_size) minus the fixed fields (sizeof()'s), the |
| 2497 | * BSS Descriptions (bss_descript_size as bytesLef) and the command |
| 2498 | * response header (S_DS_GEN) |
| 2499 | */ |
| 2500 | tlv_buf_size = scan_resp_size - (bytes_left |
| 2501 | + sizeof(scan_rsp->bss_descript_size) |
| 2502 | + sizeof(scan_rsp->number_of_sets) |
| 2503 | + S_DS_GEN); |
| 2504 | |
| 2505 | tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> |
| 2506 | bss_desc_and_tlv_buffer + |
| 2507 | bytes_left); |
| 2508 | |
| 2509 | /* Search the TLV buffer space in the scan response for any valid |
| 2510 | TLVs */ |
| 2511 | mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, |
| 2512 | TLV_TYPE_TSFTIMESTAMP, |
| 2513 | (struct mwifiex_ie_types_data **) |
| 2514 | &tsf_tlv); |
| 2515 | |
| 2516 | /* Search the TLV buffer space in the scan response for any valid |
| 2517 | TLVs */ |
| 2518 | mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, |
| 2519 | TLV_TYPE_CHANNELBANDLIST, |
| 2520 | (struct mwifiex_ie_types_data **) |
| 2521 | &chan_band_tlv); |
| 2522 | |
| 2523 | /* |
| 2524 | * Process each scan response returned (scan_rsp->number_of_sets). |
| 2525 | * Save the information in the bss_new_entry and then insert into the |
| 2526 | * driver scan table either as an update to an existing entry |
| 2527 | * or as an addition at the end of the table |
| 2528 | */ |
| 2529 | bss_new_entry = kzalloc(sizeof(struct mwifiex_bssdescriptor), |
| 2530 | GFP_KERNEL); |
| 2531 | if (!bss_new_entry) { |
| 2532 | dev_err(adapter->dev, " failed to alloc bss_new_entry\n"); |
| 2533 | return -1; |
| 2534 | } |
| 2535 | |
| 2536 | for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { |
| 2537 | /* Zero out the bss_new_entry we are about to store info in */ |
| 2538 | memset(bss_new_entry, 0x00, |
| 2539 | sizeof(struct mwifiex_bssdescriptor)); |
| 2540 | |
| 2541 | if (mwifiex_interpret_bss_desc_with_ie(adapter, bss_new_entry, |
| 2542 | &bss_info, |
| 2543 | &bytes_left)) { |
| 2544 | /* Error parsing/interpreting scan response, skipped */ |
| 2545 | dev_err(adapter->dev, "SCAN_RESP: " |
| 2546 | "mwifiex_interpret_bss_desc_with_ie " |
| 2547 | "returned ERROR\n"); |
| 2548 | continue; |
| 2549 | } |
| 2550 | |
| 2551 | /* Process the data fields and IEs returned for this BSS */ |
| 2552 | dev_dbg(adapter->dev, "info: SCAN_RESP: BSSID = %pM\n", |
| 2553 | bss_new_entry->mac_address); |
| 2554 | |
| 2555 | /* Search the scan table for the same bssid */ |
| 2556 | for (bss_idx = 0; bss_idx < num_in_table; bss_idx++) { |
| 2557 | if (memcmp(bss_new_entry->mac_address, |
| 2558 | adapter->scan_table[bss_idx].mac_address, |
| 2559 | sizeof(bss_new_entry->mac_address))) { |
| 2560 | continue; |
| 2561 | } |
| 2562 | /* |
| 2563 | * If the SSID matches as well, it is a |
| 2564 | * duplicate of this entry. Keep the bss_idx |
| 2565 | * set to this entry so we replace the old |
| 2566 | * contents in the table |
| 2567 | */ |
| 2568 | if ((bss_new_entry->ssid.ssid_len |
| 2569 | == adapter->scan_table[bss_idx]. ssid.ssid_len) |
| 2570 | && (!memcmp(bss_new_entry->ssid.ssid, |
| 2571 | adapter->scan_table[bss_idx].ssid.ssid, |
| 2572 | bss_new_entry->ssid.ssid_len))) { |
| 2573 | dev_dbg(adapter->dev, "info: SCAN_RESP:" |
| 2574 | " duplicate of index: %d\n", bss_idx); |
| 2575 | break; |
| 2576 | } |
| 2577 | } |
| 2578 | /* |
| 2579 | * If the bss_idx is equal to the number of entries in |
| 2580 | * the table, the new entry was not a duplicate; append |
| 2581 | * it to the scan table |
| 2582 | */ |
| 2583 | if (bss_idx == num_in_table) { |
| 2584 | /* Range check the bss_idx, keep it limited to |
| 2585 | the last entry */ |
| 2586 | if (bss_idx == IW_MAX_AP) |
| 2587 | bss_idx--; |
| 2588 | else |
| 2589 | num_in_table++; |
| 2590 | } |
| 2591 | |
| 2592 | /* |
| 2593 | * Save the beacon/probe response returned for later application |
| 2594 | * retrieval. Duplicate beacon/probe responses are updated if |
| 2595 | * possible |
| 2596 | */ |
| 2597 | mwifiex_ret_802_11_scan_store_beacon(priv, bss_idx, |
| 2598 | num_in_table, bss_new_entry); |
| 2599 | /* |
| 2600 | * If the TSF TLV was appended to the scan results, save this |
| 2601 | * entry's TSF value in the networkTSF field.The networkTSF is |
| 2602 | * the firmware's TSF value at the time the beacon or probe |
| 2603 | * response was received. |
| 2604 | */ |
| 2605 | if (tsf_tlv) { |
| 2606 | memcpy(&tsf_val, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE] |
| 2607 | , sizeof(tsf_val)); |
| 2608 | memcpy(&bss_new_entry->network_tsf, &tsf_val, |
| 2609 | sizeof(bss_new_entry->network_tsf)); |
| 2610 | } |
| 2611 | band = BAND_G; |
| 2612 | if (chan_band_tlv) { |
| 2613 | chan_band = &chan_band_tlv->chan_band_param[idx]; |
| 2614 | band = mwifiex_radio_type_to_band(chan_band->radio_type |
| 2615 | & (BIT(0) | BIT(1))); |
| 2616 | } |
| 2617 | |
| 2618 | /* Save the band designation for this entry for use in join */ |
| 2619 | bss_new_entry->bss_band = band; |
| 2620 | cfp = mwifiex_get_cfp_by_band_and_channel_from_cfg80211(priv, |
| 2621 | (u8) bss_new_entry->bss_band, |
| 2622 | (u16)bss_new_entry->channel); |
| 2623 | |
| 2624 | if (cfp) |
| 2625 | bss_new_entry->freq = cfp->freq; |
| 2626 | else |
| 2627 | bss_new_entry->freq = 0; |
| 2628 | |
| 2629 | /* Copy the locally created bss_new_entry to the scan table */ |
| 2630 | memcpy(&adapter->scan_table[bss_idx], bss_new_entry, |
| 2631 | sizeof(adapter->scan_table[bss_idx])); |
| 2632 | |
| 2633 | } |
| 2634 | |
| 2635 | dev_dbg(adapter->dev, |
| 2636 | "info: SCAN_RESP: Scanned %2d APs, %d valid, %d total\n", |
| 2637 | scan_rsp->number_of_sets, |
| 2638 | num_in_table - adapter->num_in_scan_table, num_in_table); |
| 2639 | |
| 2640 | /* Update the total number of BSSIDs in the scan table */ |
| 2641 | adapter->num_in_scan_table = num_in_table; |
| 2642 | |
| 2643 | spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); |
| 2644 | if (list_empty(&adapter->scan_pending_q)) { |
| 2645 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); |
| 2646 | spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); |
| 2647 | adapter->scan_processing = false; |
| 2648 | spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); |
| 2649 | /* |
| 2650 | * Process the resulting scan table: |
| 2651 | * - Remove any bad ssids |
| 2652 | * - Update our current BSS information from scan data |
| 2653 | */ |
| 2654 | mwifiex_process_scan_results(priv); |
| 2655 | |
| 2656 | /* Need to indicate IOCTL complete */ |
| 2657 | wait_queue = (struct mwifiex_wait_queue *) wq_buf; |
| 2658 | if (wait_queue) { |
| 2659 | wait_queue->status = MWIFIEX_ERROR_NO_ERROR; |
| 2660 | |
| 2661 | /* Indicate ioctl complete */ |
| 2662 | mwifiex_ioctl_complete(adapter, |
| 2663 | (struct mwifiex_wait_queue *) wait_queue, 0); |
| 2664 | } |
| 2665 | if (priv->report_scan_result) |
| 2666 | priv->report_scan_result = false; |
| 2667 | if (priv->scan_pending_on_block) { |
| 2668 | priv->scan_pending_on_block = false; |
| 2669 | up(&priv->async_sem); |
| 2670 | } |
| 2671 | |
| 2672 | } else { |
| 2673 | /* Get scan command from scan_pending_q and put to |
| 2674 | cmd_pending_q */ |
| 2675 | cmd_node = list_first_entry(&adapter->scan_pending_q, |
| 2676 | struct cmd_ctrl_node, list); |
| 2677 | list_del(&cmd_node->list); |
| 2678 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); |
| 2679 | |
| 2680 | mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true); |
| 2681 | } |
| 2682 | |
| 2683 | done: |
| 2684 | kfree((u8 *) bss_new_entry); |
| 2685 | return ret; |
| 2686 | } |
| 2687 | |
| 2688 | /* |
| 2689 | * This function prepares command for background scan query. |
| 2690 | * |
| 2691 | * Preparation includes - |
| 2692 | * - Setting command ID and proper size |
| 2693 | * - Setting background scan flush parameter |
| 2694 | * - Ensuring correct endian-ness |
| 2695 | */ |
| 2696 | int mwifiex_cmd_802_11_bg_scan_query(struct mwifiex_private *priv, |
| 2697 | struct host_cmd_ds_command *cmd, |
| 2698 | void *data_buf) |
| 2699 | { |
| 2700 | struct host_cmd_ds_802_11_bg_scan_query *bg_query = |
| 2701 | &cmd->params.bg_scan_query; |
| 2702 | |
| 2703 | cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); |
| 2704 | cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) |
| 2705 | + S_DS_GEN); |
| 2706 | |
| 2707 | bg_query->flush = 1; |
| 2708 | |
| 2709 | return 0; |
| 2710 | } |
| 2711 | |
| 2712 | /* |
| 2713 | * This function finds a SSID in the scan table. |
| 2714 | * |
| 2715 | * A BSSID may optionally be provided to qualify the SSID. |
| 2716 | * For non-Auto mode, further check is made to make sure the |
| 2717 | * BSS found in the scan table is compatible with the current |
| 2718 | * settings of the driver. |
| 2719 | */ |
| 2720 | s32 |
| 2721 | mwifiex_find_ssid_in_list(struct mwifiex_private *priv, |
| 2722 | struct mwifiex_802_11_ssid *ssid, u8 *bssid, |
| 2723 | u32 mode) |
| 2724 | { |
| 2725 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2726 | s32 net = -1, j; |
| 2727 | u8 best_rssi = 0; |
| 2728 | u32 i; |
| 2729 | |
| 2730 | dev_dbg(adapter->dev, "info: num of entries in table = %d\n", |
| 2731 | adapter->num_in_scan_table); |
| 2732 | |
| 2733 | /* |
| 2734 | * Loop through the table until the maximum is reached or until a match |
| 2735 | * is found based on the bssid field comparison |
| 2736 | */ |
| 2737 | for (i = 0; |
| 2738 | i < adapter->num_in_scan_table && (!bssid || (bssid && net < 0)); |
| 2739 | i++) { |
| 2740 | if (!mwifiex_ssid_cmp(&adapter->scan_table[i].ssid, ssid) && |
| 2741 | (!bssid |
| 2742 | || !memcmp(adapter->scan_table[i].mac_address, bssid, |
| 2743 | ETH_ALEN)) |
| 2744 | && |
| 2745 | (mwifiex_get_cfp_by_band_and_channel_from_cfg80211 |
| 2746 | (priv, (u8) adapter->scan_table[i].bss_band, |
| 2747 | (u16) adapter->scan_table[i].channel))) { |
| 2748 | switch (mode) { |
| 2749 | case MWIFIEX_BSS_MODE_INFRA: |
| 2750 | case MWIFIEX_BSS_MODE_IBSS: |
| 2751 | j = mwifiex_is_network_compatible(priv, i, |
| 2752 | mode); |
| 2753 | |
| 2754 | if (j >= 0) { |
| 2755 | if (SCAN_RSSI |
| 2756 | (adapter->scan_table[i].rssi) > |
| 2757 | best_rssi) { |
| 2758 | best_rssi = SCAN_RSSI(adapter-> |
| 2759 | scan_table |
| 2760 | [i].rssi); |
| 2761 | net = i; |
| 2762 | } |
| 2763 | } else { |
| 2764 | if (net == -1) |
| 2765 | net = j; |
| 2766 | } |
| 2767 | break; |
| 2768 | case MWIFIEX_BSS_MODE_AUTO: |
| 2769 | default: |
| 2770 | /* |
| 2771 | * Do not check compatibility if the mode |
| 2772 | * requested is Auto/Unknown. Allows generic |
| 2773 | * find to work without verifying against the |
| 2774 | * Adapter security settings |
| 2775 | */ |
| 2776 | if (SCAN_RSSI(adapter->scan_table[i].rssi) > |
| 2777 | best_rssi) { |
| 2778 | best_rssi = SCAN_RSSI(adapter-> |
| 2779 | scan_table[i].rssi); |
| 2780 | net = i; |
| 2781 | } |
| 2782 | break; |
| 2783 | } |
| 2784 | } |
| 2785 | } |
| 2786 | |
| 2787 | return net; |
| 2788 | } |
| 2789 | |
| 2790 | /* |
| 2791 | * This function finds a specific compatible BSSID in the scan list. |
| 2792 | * |
| 2793 | * This function loops through the scan table looking for a compatible |
| 2794 | * match. If a BSSID matches, but the BSS is found to be not compatible |
| 2795 | * the function ignores it and continues to search through the rest of |
| 2796 | * the entries in case there is an AP with multiple SSIDs assigned to |
| 2797 | * the same BSSID. |
| 2798 | */ |
| 2799 | s32 |
| 2800 | mwifiex_find_bssid_in_list(struct mwifiex_private *priv, u8 *bssid, |
| 2801 | u32 mode) |
| 2802 | { |
| 2803 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2804 | s32 net = -1; |
| 2805 | u32 i; |
| 2806 | |
| 2807 | if (!bssid) |
| 2808 | return -1; |
| 2809 | |
| 2810 | dev_dbg(adapter->dev, "info: FindBSSID: Num of BSSIDs = %d\n", |
| 2811 | adapter->num_in_scan_table); |
| 2812 | |
| 2813 | /* |
| 2814 | * Look through the scan table for a compatible match. The ret return |
| 2815 | * variable will be equal to the index in the scan table (greater |
| 2816 | * than zero) if the network is compatible. The loop will continue |
| 2817 | * past a matched bssid that is not compatible in case there is an |
| 2818 | * AP with multiple SSIDs assigned to the same BSSID |
| 2819 | */ |
| 2820 | for (i = 0; net < 0 && i < adapter->num_in_scan_table; i++) { |
| 2821 | if (!memcmp |
| 2822 | (adapter->scan_table[i].mac_address, bssid, ETH_ALEN) |
| 2823 | && mwifiex_get_cfp_by_band_and_channel_from_cfg80211 |
| 2824 | (priv, |
| 2825 | (u8) adapter-> |
| 2826 | scan_table[i]. |
| 2827 | bss_band, |
| 2828 | (u16) adapter-> |
| 2829 | scan_table[i]. |
| 2830 | channel)) { |
| 2831 | switch (mode) { |
| 2832 | case MWIFIEX_BSS_MODE_INFRA: |
| 2833 | case MWIFIEX_BSS_MODE_IBSS: |
| 2834 | net = mwifiex_is_network_compatible(priv, i, |
| 2835 | mode); |
| 2836 | break; |
| 2837 | default: |
| 2838 | net = i; |
| 2839 | break; |
| 2840 | } |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | return net; |
| 2845 | } |
| 2846 | |
| 2847 | /* |
| 2848 | * This function inserts scan command node to the scan pending queue. |
| 2849 | */ |
| 2850 | void |
| 2851 | mwifiex_queue_scan_cmd(struct mwifiex_private *priv, |
| 2852 | struct cmd_ctrl_node *cmd_node) |
| 2853 | { |
| 2854 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2855 | unsigned long flags; |
| 2856 | |
| 2857 | spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); |
| 2858 | list_add_tail(&cmd_node->list, &adapter->scan_pending_q); |
| 2859 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); |
| 2860 | } |
| 2861 | |
| 2862 | /* |
| 2863 | * This function finds an AP with specific ssid in the scan list. |
| 2864 | */ |
| 2865 | int mwifiex_find_best_network(struct mwifiex_private *priv, |
| 2866 | struct mwifiex_ssid_bssid *req_ssid_bssid) |
| 2867 | { |
| 2868 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2869 | struct mwifiex_bssdescriptor *req_bss; |
| 2870 | s32 i; |
| 2871 | |
| 2872 | memset(req_ssid_bssid, 0, sizeof(struct mwifiex_ssid_bssid)); |
| 2873 | |
| 2874 | i = mwifiex_find_best_network_in_list(priv); |
| 2875 | |
| 2876 | if (i >= 0) { |
| 2877 | req_bss = &adapter->scan_table[i]; |
| 2878 | memcpy(&req_ssid_bssid->ssid, &req_bss->ssid, |
| 2879 | sizeof(struct mwifiex_802_11_ssid)); |
| 2880 | memcpy((u8 *) &req_ssid_bssid->bssid, |
| 2881 | (u8 *) &req_bss->mac_address, ETH_ALEN); |
| 2882 | |
| 2883 | /* Make sure we are in the right mode */ |
| 2884 | if (priv->bss_mode == MWIFIEX_BSS_MODE_AUTO) |
| 2885 | priv->bss_mode = req_bss->bss_mode; |
| 2886 | } |
| 2887 | |
| 2888 | if (!req_ssid_bssid->ssid.ssid_len) |
| 2889 | return -1; |
| 2890 | |
| 2891 | dev_dbg(adapter->dev, "info: Best network found = [%s], " |
| 2892 | "[%pM]\n", req_ssid_bssid->ssid.ssid, |
| 2893 | req_ssid_bssid->bssid); |
| 2894 | |
| 2895 | return 0; |
| 2896 | } |
| 2897 | |
| 2898 | /* |
| 2899 | * This function sends a scan command for all available channels to the |
| 2900 | * firmware, filtered on a specific SSID. |
| 2901 | */ |
| 2902 | static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, |
| 2903 | void *wait_buf, u16 action, |
| 2904 | struct mwifiex_802_11_ssid *req_ssid, |
| 2905 | struct mwifiex_scan_resp *scan_resp) |
| 2906 | { |
| 2907 | struct mwifiex_adapter *adapter = priv->adapter; |
| 2908 | int ret = 0; |
| 2909 | struct mwifiex_user_scan_cfg *scan_cfg; |
| 2910 | |
| 2911 | if (!req_ssid) |
| 2912 | return -1; |
| 2913 | |
| 2914 | if (action == HostCmd_ACT_GEN_GET) { |
| 2915 | if (scan_resp) { |
| 2916 | scan_resp->scan_table = |
| 2917 | (u8 *) &priv->curr_bss_params.bss_descriptor; |
| 2918 | scan_resp->num_in_scan_table = |
| 2919 | adapter->num_in_scan_table; |
| 2920 | } else { |
| 2921 | ret = -1; |
| 2922 | } |
| 2923 | return ret; |
| 2924 | } |
| 2925 | |
| 2926 | if (adapter->scan_processing && action == HostCmd_ACT_GEN_SET) { |
| 2927 | dev_dbg(adapter->dev, "cmd: Scan already in process...\n"); |
| 2928 | return ret; |
| 2929 | } |
| 2930 | |
| 2931 | if (priv->scan_block && action == HostCmd_ACT_GEN_SET) { |
| 2932 | dev_dbg(adapter->dev, |
| 2933 | "cmd: Scan is blocked during association...\n"); |
| 2934 | return ret; |
| 2935 | } |
| 2936 | |
| 2937 | mwifiex_scan_delete_ssid_table_entry(priv, req_ssid); |
| 2938 | |
| 2939 | scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); |
| 2940 | if (!scan_cfg) { |
| 2941 | dev_err(adapter->dev, "failed to alloc scan_cfg\n"); |
| 2942 | return -1; |
| 2943 | } |
| 2944 | |
| 2945 | memcpy(scan_cfg->ssid_list[0].ssid, req_ssid->ssid, |
| 2946 | req_ssid->ssid_len); |
| 2947 | scan_cfg->keep_previous_scan = true; |
| 2948 | |
| 2949 | ret = mwifiex_scan_networks(priv, wait_buf, action, scan_cfg, NULL); |
| 2950 | |
| 2951 | kfree(scan_cfg); |
| 2952 | return ret; |
| 2953 | } |
| 2954 | |
| 2955 | /* |
| 2956 | * Sends IOCTL request to start a scan. |
| 2957 | * |
| 2958 | * This function allocates the IOCTL request buffer, fills it |
| 2959 | * with requisite parameters and calls the IOCTL handler. |
| 2960 | * |
| 2961 | * Scan command can be issued for both normal scan and specific SSID |
| 2962 | * scan, depending upon whether an SSID is provided or not. |
| 2963 | */ |
| 2964 | int mwifiex_request_scan(struct mwifiex_private *priv, u8 wait_option, |
| 2965 | struct mwifiex_802_11_ssid *req_ssid) |
| 2966 | { |
| 2967 | int ret = 0; |
| 2968 | struct mwifiex_wait_queue *wait = NULL; |
| 2969 | int status = 0; |
| 2970 | |
| 2971 | if (down_interruptible(&priv->async_sem)) { |
| 2972 | dev_err(priv->adapter->dev, "%s: acquire semaphore\n", |
| 2973 | __func__); |
| 2974 | return -1; |
| 2975 | } |
| 2976 | priv->scan_pending_on_block = true; |
| 2977 | |
| 2978 | /* Allocate wait request buffer */ |
| 2979 | wait = mwifiex_alloc_fill_wait_queue(priv, wait_option); |
| 2980 | if (!wait) { |
| 2981 | ret = -1; |
| 2982 | goto done; |
| 2983 | } |
| 2984 | |
| 2985 | if (req_ssid && req_ssid->ssid_len != 0) |
| 2986 | /* Specific SSID scan */ |
| 2987 | status = mwifiex_scan_specific_ssid(priv, wait, |
| 2988 | HostCmd_ACT_GEN_SET, |
| 2989 | req_ssid, NULL); |
| 2990 | else |
| 2991 | /* Normal scan */ |
| 2992 | status = mwifiex_scan_networks(priv, wait, HostCmd_ACT_GEN_SET, |
| 2993 | NULL, NULL); |
| 2994 | status = mwifiex_request_ioctl(priv, wait, status, wait_option); |
| 2995 | if (status == -1) |
| 2996 | ret = -1; |
| 2997 | done: |
| 2998 | if ((wait) && (status != -EINPROGRESS)) |
| 2999 | kfree(wait); |
| 3000 | if (ret == -1) { |
| 3001 | priv->scan_pending_on_block = false; |
| 3002 | up(&priv->async_sem); |
| 3003 | } |
| 3004 | return ret; |
| 3005 | } |
| 3006 | |
| 3007 | /* |
| 3008 | * This function appends the vendor specific IE TLV to a buffer. |
| 3009 | */ |
| 3010 | int |
| 3011 | mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, |
| 3012 | u16 vsie_mask, u8 **buffer) |
| 3013 | { |
| 3014 | int id, ret_len = 0; |
| 3015 | struct mwifiex_ie_types_vendor_param_set *vs_param_set; |
| 3016 | |
| 3017 | if (!buffer) |
| 3018 | return 0; |
| 3019 | if (!(*buffer)) |
| 3020 | return 0; |
| 3021 | |
| 3022 | /* |
| 3023 | * Traverse through the saved vendor specific IE array and append |
| 3024 | * the selected(scan/assoc/adhoc) IE as TLV to the command |
| 3025 | */ |
| 3026 | for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { |
| 3027 | if (priv->vs_ie[id].mask & vsie_mask) { |
| 3028 | vs_param_set = |
| 3029 | (struct mwifiex_ie_types_vendor_param_set *) |
| 3030 | *buffer; |
| 3031 | vs_param_set->header.type = |
| 3032 | cpu_to_le16(TLV_TYPE_PASSTHROUGH); |
| 3033 | vs_param_set->header.len = |
| 3034 | cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) |
| 3035 | & 0x00FF) + 2); |
| 3036 | memcpy(vs_param_set->ie, priv->vs_ie[id].ie, |
| 3037 | le16_to_cpu(vs_param_set->header.len)); |
| 3038 | *buffer += le16_to_cpu(vs_param_set->header.len) + |
| 3039 | sizeof(struct mwifiex_ie_types_header); |
| 3040 | ret_len += le16_to_cpu(vs_param_set->header.len) + |
| 3041 | sizeof(struct mwifiex_ie_types_header); |
| 3042 | } |
| 3043 | } |
| 3044 | return ret_len; |
| 3045 | } |
| 3046 | |
| 3047 | /* |
| 3048 | * This function saves a beacon buffer of the current BSS descriptor. |
| 3049 | * |
| 3050 | * The current beacon buffer is saved so that it can be restored in the |
| 3051 | * following cases that makes the beacon buffer not to contain the current |
| 3052 | * ssid's beacon buffer. |
| 3053 | * - The current ssid was not found somehow in the last scan. |
| 3054 | * - The current ssid was the last entry of the scan table and overloaded. |
| 3055 | */ |
| 3056 | void |
| 3057 | mwifiex_save_curr_bcn(struct mwifiex_private *priv) |
| 3058 | { |
| 3059 | struct mwifiex_bssdescriptor *curr_bss = |
| 3060 | &priv->curr_bss_params.bss_descriptor; |
| 3061 | |
| 3062 | /* save the beacon buffer if it is not saved or updated */ |
| 3063 | if ((priv->curr_bcn_buf == NULL) || |
| 3064 | (priv->curr_bcn_size != curr_bss->beacon_buf_size) || |
| 3065 | (memcmp(priv->curr_bcn_buf, curr_bss->beacon_buf, |
| 3066 | curr_bss->beacon_buf_size))) { |
| 3067 | |
| 3068 | kfree(priv->curr_bcn_buf); |
| 3069 | priv->curr_bcn_buf = NULL; |
| 3070 | |
| 3071 | priv->curr_bcn_size = curr_bss->beacon_buf_size; |
| 3072 | if (!priv->curr_bcn_size) |
| 3073 | return; |
| 3074 | |
| 3075 | priv->curr_bcn_buf = kzalloc(curr_bss->beacon_buf_size, |
| 3076 | GFP_KERNEL); |
| 3077 | if (!priv->curr_bcn_buf) { |
| 3078 | dev_err(priv->adapter->dev, |
| 3079 | "failed to alloc curr_bcn_buf\n"); |
| 3080 | } else { |
| 3081 | memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, |
| 3082 | curr_bss->beacon_buf_size); |
| 3083 | dev_dbg(priv->adapter->dev, |
| 3084 | "info: current beacon saved %d\n", |
| 3085 | priv->curr_bcn_size); |
| 3086 | } |
| 3087 | } |
| 3088 | } |
| 3089 | |
| 3090 | /* |
| 3091 | * This function frees the current BSS descriptor beacon buffer. |
| 3092 | */ |
| 3093 | void |
| 3094 | mwifiex_free_curr_bcn(struct mwifiex_private *priv) |
| 3095 | { |
| 3096 | kfree(priv->curr_bcn_buf); |
| 3097 | priv->curr_bcn_buf = NULL; |
| 3098 | } |