Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1 | /** |
| 2 | * Functions implementing wlan scan IOCTL and firmware command APIs |
| 3 | * |
| 4 | * IOCTL handlers as well as command preperation and response routines |
| 5 | * for sending scan commands to the firmware. |
| 6 | */ |
| 7 | #include <linux/ctype.h> |
| 8 | #include <linux/if.h> |
| 9 | #include <linux/netdevice.h> |
| 10 | #include <linux/wireless.h> |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 11 | #include <linux/etherdevice.h> |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 12 | |
| 13 | #include <net/ieee80211.h> |
| 14 | #include <net/iw_handler.h> |
| 15 | |
Vladimir Davydov | ac630c2 | 2007-09-06 21:45:36 -0400 | [diff] [blame] | 16 | #include <asm/unaligned.h> |
| 17 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 18 | #include "host.h" |
| 19 | #include "decl.h" |
| 20 | #include "dev.h" |
| 21 | #include "scan.h" |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 22 | #include "join.h" |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 23 | |
| 24 | //! Approximate amount of data needed to pass a scan result back to iwlist |
| 25 | #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \ |
| 26 | + IW_ESSID_MAX_SIZE \ |
| 27 | + IW_EV_UINT_LEN \ |
| 28 | + IW_EV_FREQ_LEN \ |
| 29 | + IW_EV_QUAL_LEN \ |
| 30 | + IW_ESSID_MAX_SIZE \ |
| 31 | + IW_EV_PARAM_LEN \ |
| 32 | + 40) /* 40 for WPAIE */ |
| 33 | |
| 34 | //! Memory needed to store a max sized channel List TLV for a firmware scan |
| 35 | #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \ |
| 36 | + (MRVDRV_MAX_CHANNELS_PER_SCAN \ |
| 37 | * sizeof(struct chanscanparamset))) |
| 38 | |
| 39 | //! Memory needed to store a max number/size SSID TLV for a firmware scan |
| 40 | #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset)) |
| 41 | |
| 42 | //! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max |
| 43 | #define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \ |
| 44 | + sizeof(struct mrvlietypes_numprobes) \ |
| 45 | + CHAN_TLV_MAX_SIZE \ |
| 46 | + SSID_TLV_MAX_SIZE) |
| 47 | |
| 48 | //! The maximum number of channels the firmware can scan per command |
| 49 | #define MRVDRV_MAX_CHANNELS_PER_SCAN 14 |
| 50 | |
| 51 | /** |
| 52 | * @brief Number of channels to scan per firmware scan command issuance. |
| 53 | * |
| 54 | * Number restricted to prevent hitting the limit on the amount of scan data |
| 55 | * returned in a single firmware scan command. |
| 56 | */ |
| 57 | #define MRVDRV_CHANNELS_PER_SCAN_CMD 4 |
| 58 | |
| 59 | //! Scan time specified in the channel TLV for each channel for passive scans |
| 60 | #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100 |
| 61 | |
| 62 | //! Scan time specified in the channel TLV for each channel for active scans |
| 63 | #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100 |
| 64 | |
Dan Williams | 123e0e0 | 2007-05-25 23:23:43 -0400 | [diff] [blame] | 65 | static const u8 zeromac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
| 66 | static const u8 bcastmac[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 67 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 68 | |
| 69 | |
| 70 | |
| 71 | /*********************************************************************/ |
| 72 | /* */ |
| 73 | /* Misc helper functions */ |
| 74 | /* */ |
| 75 | /*********************************************************************/ |
| 76 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 77 | static inline void clear_bss_descriptor (struct bss_descriptor * bss) |
| 78 | { |
| 79 | /* Don't blow away ->list, just BSS data */ |
| 80 | memset(bss, 0, offsetof(struct bss_descriptor, list)); |
| 81 | } |
| 82 | |
| 83 | static inline int match_bss_no_security(struct wlan_802_11_security * secinfo, |
| 84 | struct bss_descriptor * match_bss) |
| 85 | { |
| 86 | if ( !secinfo->wep_enabled |
| 87 | && !secinfo->WPAenabled |
| 88 | && !secinfo->WPA2enabled |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 89 | && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC |
| 90 | && match_bss->rsn_ie[0] != MFIE_TYPE_RSN |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 91 | && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 92 | return 1; |
| 93 | } |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static inline int match_bss_static_wep(struct wlan_802_11_security * secinfo, |
| 98 | struct bss_descriptor * match_bss) |
| 99 | { |
| 100 | if ( secinfo->wep_enabled |
| 101 | && !secinfo->WPAenabled |
| 102 | && !secinfo->WPA2enabled |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 103 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 104 | return 1; |
| 105 | } |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static inline int match_bss_wpa(struct wlan_802_11_security * secinfo, |
| 110 | struct bss_descriptor * match_bss) |
| 111 | { |
| 112 | if ( !secinfo->wep_enabled |
| 113 | && secinfo->WPAenabled |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 114 | && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC) |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 115 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 116 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
| 117 | */ |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 118 | ) { |
| 119 | return 1; |
| 120 | } |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | static inline int match_bss_wpa2(struct wlan_802_11_security * secinfo, |
| 125 | struct bss_descriptor * match_bss) |
| 126 | { |
| 127 | if ( !secinfo->wep_enabled |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 128 | && secinfo->WPA2enabled |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 129 | && (match_bss->rsn_ie[0] == MFIE_TYPE_RSN) |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 130 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 131 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
| 132 | */ |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 133 | ) { |
| 134 | return 1; |
| 135 | } |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static inline int match_bss_dynamic_wep(struct wlan_802_11_security * secinfo, |
| 140 | struct bss_descriptor * match_bss) |
| 141 | { |
| 142 | if ( !secinfo->wep_enabled |
| 143 | && !secinfo->WPAenabled |
| 144 | && !secinfo->WPA2enabled |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 145 | && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC) |
| 146 | && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN) |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 147 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 148 | return 1; |
| 149 | } |
| 150 | return 0; |
| 151 | } |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 152 | |
| 153 | /** |
| 154 | * @brief Check if a scanned network compatible with the driver settings |
| 155 | * |
| 156 | * WEP WPA WPA2 ad-hoc encrypt Network |
| 157 | * enabled enabled enabled AES mode privacy WPA WPA2 Compatible |
| 158 | * 0 0 0 0 NONE 0 0 0 yes No security |
| 159 | * 1 0 0 0 NONE 1 0 0 yes Static WEP |
| 160 | * 0 1 0 0 x 1x 1 x yes WPA |
| 161 | * 0 0 1 0 x 1x x 1 yes WPA2 |
| 162 | * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES |
| 163 | * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP |
| 164 | * |
| 165 | * |
| 166 | * @param adapter A pointer to wlan_adapter |
| 167 | * @param index Index in scantable to check against current driver settings |
| 168 | * @param mode Network mode: Infrastructure or IBSS |
| 169 | * |
| 170 | * @return Index in scantable, or error code if negative |
| 171 | */ |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 172 | static int is_network_compatible(wlan_adapter * adapter, |
| 173 | struct bss_descriptor * bss, u8 mode) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 174 | { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 175 | int matched = 0; |
| 176 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 177 | lbs_deb_enter(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 178 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 179 | if (bss->mode != mode) |
| 180 | goto done; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 181 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 182 | if ((matched = match_bss_no_security(&adapter->secinfo, bss))) { |
| 183 | goto done; |
| 184 | } else if ((matched = match_bss_static_wep(&adapter->secinfo, bss))) { |
| 185 | goto done; |
| 186 | } else if ((matched = match_bss_wpa(&adapter->secinfo, bss))) { |
| 187 | lbs_deb_scan( |
| 188 | "is_network_compatible() WPA: wpa_ie=%#x " |
| 189 | "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " |
| 190 | "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0], |
Dan Williams | 889c05b | 2007-05-10 22:57:23 -0400 | [diff] [blame] | 191 | adapter->secinfo.wep_enabled ? "e" : "d", |
| 192 | adapter->secinfo.WPAenabled ? "e" : "d", |
| 193 | adapter->secinfo.WPA2enabled ? "e" : "d", |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 194 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 195 | goto done; |
| 196 | } else if ((matched = match_bss_wpa2(&adapter->secinfo, bss))) { |
| 197 | lbs_deb_scan( |
| 198 | "is_network_compatible() WPA2: wpa_ie=%#x " |
| 199 | "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " |
| 200 | "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0], |
| 201 | adapter->secinfo.wep_enabled ? "e" : "d", |
| 202 | adapter->secinfo.WPAenabled ? "e" : "d", |
| 203 | adapter->secinfo.WPA2enabled ? "e" : "d", |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 204 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 205 | goto done; |
| 206 | } else if ((matched = match_bss_dynamic_wep(&adapter->secinfo, bss))) { |
| 207 | lbs_deb_scan( |
| 208 | "is_network_compatible() dynamic WEP: " |
| 209 | "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n", |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 210 | bss->wpa_ie[0], bss->rsn_ie[0], |
| 211 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 212 | goto done; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 213 | } |
| 214 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 215 | /* bss security settings don't match those configured on card */ |
| 216 | lbs_deb_scan( |
| 217 | "is_network_compatible() FAILED: wpa_ie=%#x " |
| 218 | "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n", |
| 219 | bss->wpa_ie[0], bss->rsn_ie[0], |
| 220 | adapter->secinfo.wep_enabled ? "e" : "d", |
| 221 | adapter->secinfo.WPAenabled ? "e" : "d", |
| 222 | adapter->secinfo.WPA2enabled ? "e" : "d", |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 223 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 224 | |
| 225 | done: |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 226 | lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 227 | return matched; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | /** |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 231 | * @brief Compare two SSIDs |
| 232 | * |
| 233 | * @param ssid1 A pointer to ssid to compare |
| 234 | * @param ssid2 A pointer to ssid to compare |
| 235 | * |
| 236 | * @return 0--ssid is same, otherwise is different |
| 237 | */ |
| 238 | int libertas_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len) |
| 239 | { |
| 240 | if (ssid1_len != ssid2_len) |
| 241 | return -1; |
| 242 | |
| 243 | return memcmp(ssid1, ssid2, ssid1_len); |
| 244 | } |
| 245 | |
| 246 | |
| 247 | |
| 248 | |
| 249 | /*********************************************************************/ |
| 250 | /* */ |
| 251 | /* Main scanning support */ |
| 252 | /* */ |
| 253 | /*********************************************************************/ |
| 254 | |
| 255 | |
| 256 | /** |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 257 | * @brief Create a channel list for the driver to scan based on region info |
| 258 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 259 | * Only used from wlan_scan_setup_scan_config() |
| 260 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 261 | * Use the driver region/band information to construct a comprehensive list |
| 262 | * of channels to scan. This routine is used for any scan that is not |
| 263 | * provided a specific channel list to scan. |
| 264 | * |
| 265 | * @param priv A pointer to wlan_private structure |
| 266 | * @param scanchanlist Output parameter: resulting channel list to scan |
| 267 | * @param filteredscan Flag indicating whether or not a BSSID or SSID filter |
| 268 | * is being sent in the command to firmware. Used to |
| 269 | * increase the number of channels sent in a scan |
| 270 | * command and to disable the firmware channel scan |
| 271 | * filter. |
| 272 | * |
| 273 | * @return void |
| 274 | */ |
| 275 | static void wlan_scan_create_channel_list(wlan_private * priv, |
| 276 | struct chanscanparamset * scanchanlist, |
| 277 | u8 filteredscan) |
| 278 | { |
| 279 | |
| 280 | wlan_adapter *adapter = priv->adapter; |
| 281 | struct region_channel *scanregion; |
| 282 | struct chan_freq_power *cfp; |
| 283 | int rgnidx; |
| 284 | int chanidx; |
| 285 | int nextchan; |
| 286 | u8 scantype; |
| 287 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 288 | lbs_deb_enter_args(LBS_DEB_SCAN, "filteredscan %d", filteredscan); |
| 289 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 290 | chanidx = 0; |
| 291 | |
| 292 | /* Set the default scan type to the user specified type, will later |
| 293 | * be changed to passive on a per channel basis if restricted by |
| 294 | * regulatory requirements (11d or 11h) |
| 295 | */ |
Holger Schurig | 4f2fdaa | 2007-08-02 13:12:27 -0400 | [diff] [blame] | 296 | scantype = CMD_SCAN_TYPE_ACTIVE; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 297 | |
| 298 | for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) { |
| 299 | if (priv->adapter->enable11d && |
Dan Williams | 0aef64d | 2007-08-02 11:31:18 -0400 | [diff] [blame] | 300 | adapter->connect_status != LIBERTAS_CONNECTED) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 301 | /* Scan all the supported chan for the first scan */ |
| 302 | if (!adapter->universal_channel[rgnidx].valid) |
| 303 | continue; |
| 304 | scanregion = &adapter->universal_channel[rgnidx]; |
| 305 | |
| 306 | /* clear the parsed_region_chan for the first scan */ |
| 307 | memset(&adapter->parsed_region_chan, 0x00, |
| 308 | sizeof(adapter->parsed_region_chan)); |
| 309 | } else { |
| 310 | if (!adapter->region_channel[rgnidx].valid) |
| 311 | continue; |
| 312 | scanregion = &adapter->region_channel[rgnidx]; |
| 313 | } |
| 314 | |
| 315 | for (nextchan = 0; |
| 316 | nextchan < scanregion->nrcfp; nextchan++, chanidx++) { |
| 317 | |
| 318 | cfp = scanregion->CFP + nextchan; |
| 319 | |
| 320 | if (priv->adapter->enable11d) { |
| 321 | scantype = |
| 322 | libertas_get_scan_type_11d(cfp->channel, |
| 323 | &adapter-> |
| 324 | parsed_region_chan); |
| 325 | } |
| 326 | |
| 327 | switch (scanregion->band) { |
| 328 | case BAND_B: |
| 329 | case BAND_G: |
| 330 | default: |
| 331 | scanchanlist[chanidx].radiotype = |
Dan Williams | 0aef64d | 2007-08-02 11:31:18 -0400 | [diff] [blame] | 332 | CMD_SCAN_RADIO_TYPE_BG; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 333 | break; |
| 334 | } |
| 335 | |
Dan Williams | 0aef64d | 2007-08-02 11:31:18 -0400 | [diff] [blame] | 336 | if (scantype == CMD_SCAN_TYPE_PASSIVE) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 337 | scanchanlist[chanidx].maxscantime = |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 338 | cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 339 | scanchanlist[chanidx].chanscanmode.passivescan = |
| 340 | 1; |
| 341 | } else { |
| 342 | scanchanlist[chanidx].maxscantime = |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 343 | cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 344 | scanchanlist[chanidx].chanscanmode.passivescan = |
| 345 | 0; |
| 346 | } |
| 347 | |
| 348 | scanchanlist[chanidx].channumber = cfp->channel; |
| 349 | |
| 350 | if (filteredscan) { |
| 351 | scanchanlist[chanidx].chanscanmode. |
| 352 | disablechanfilt = 1; |
| 353 | } |
| 354 | } |
| 355 | } |
| 356 | } |
| 357 | |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 358 | |
| 359 | /* Delayed partial scan worker */ |
| 360 | void libertas_scan_worker(struct work_struct *work) |
| 361 | { |
| 362 | wlan_private *priv = container_of(work, wlan_private, scan_work.work); |
| 363 | |
| 364 | wlan_scan_networks(priv, NULL, 0); |
| 365 | } |
| 366 | |
| 367 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 368 | /** |
| 369 | * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds |
| 370 | * |
| 371 | * Application layer or other functions can invoke wlan_scan_networks |
| 372 | * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct. |
| 373 | * This structure is used as the basis of one or many wlan_scan_cmd_config |
| 374 | * commands that are sent to the command processing module and sent to |
| 375 | * firmware. |
| 376 | * |
| 377 | * Create a wlan_scan_cmd_config based on the following user supplied |
| 378 | * parameters (if present): |
| 379 | * - SSID filter |
| 380 | * - BSSID filter |
| 381 | * - Number of Probes to be sent |
| 382 | * - channel list |
| 383 | * |
| 384 | * If the SSID or BSSID filter is not present, disable/clear the filter. |
| 385 | * If the number of probes is not set, use the adapter default setting |
| 386 | * Qualify the channel |
| 387 | * |
| 388 | * @param priv A pointer to wlan_private structure |
| 389 | * @param puserscanin NULL or pointer to scan configuration parameters |
| 390 | * @param ppchantlvout Output parameter: Pointer to the start of the |
| 391 | * channel TLV portion of the output scan config |
| 392 | * @param pscanchanlist Output parameter: Pointer to the resulting channel |
| 393 | * list to scan |
| 394 | * @param pmaxchanperscan Output parameter: Number of channels to scan for |
| 395 | * each issuance of the firmware scan command |
| 396 | * @param pfilteredscan Output parameter: Flag indicating whether or not |
| 397 | * a BSSID or SSID filter is being sent in the |
| 398 | * command to firmware. Used to increase the number |
| 399 | * of channels sent in a scan command and to |
| 400 | * disable the firmware channel scan filter. |
| 401 | * @param pscancurrentonly Output parameter: Flag indicating whether or not |
| 402 | * we are only scanning our current active channel |
| 403 | * |
| 404 | * @return resulting scan configuration |
| 405 | */ |
| 406 | static struct wlan_scan_cmd_config * |
| 407 | wlan_scan_setup_scan_config(wlan_private * priv, |
| 408 | const struct wlan_ioctl_user_scan_cfg * puserscanin, |
| 409 | struct mrvlietypes_chanlistparamset ** ppchantlvout, |
| 410 | struct chanscanparamset * pscanchanlist, |
| 411 | int *pmaxchanperscan, |
| 412 | u8 * pfilteredscan, |
| 413 | u8 * pscancurrentonly) |
| 414 | { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 415 | struct mrvlietypes_numprobes *pnumprobestlv; |
| 416 | struct mrvlietypes_ssidparamset *pssidtlv; |
| 417 | struct wlan_scan_cmd_config * pscancfgout = NULL; |
| 418 | u8 *ptlvpos; |
| 419 | u16 numprobes; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 420 | int chanidx; |
| 421 | int scantype; |
| 422 | int scandur; |
| 423 | int channel; |
| 424 | int radiotype; |
| 425 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 426 | lbs_deb_enter(LBS_DEB_SCAN); |
| 427 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 428 | pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL); |
| 429 | if (pscancfgout == NULL) |
| 430 | goto out; |
| 431 | |
| 432 | /* The tlvbufferlen is calculated for each scan command. The TLVs added |
| 433 | * in this routine will be preserved since the routine that sends |
| 434 | * the command will append channelTLVs at *ppchantlvout. The difference |
| 435 | * between the *ppchantlvout and the tlvbuffer start will be used |
| 436 | * to calculate the size of anything we add in this routine. |
| 437 | */ |
| 438 | pscancfgout->tlvbufferlen = 0; |
| 439 | |
| 440 | /* Running tlv pointer. Assigned to ppchantlvout at end of function |
| 441 | * so later routines know where channels can be added to the command buf |
| 442 | */ |
| 443 | ptlvpos = pscancfgout->tlvbuffer; |
| 444 | |
| 445 | /* |
| 446 | * Set the initial scan paramters for progressive scanning. If a specific |
| 447 | * BSSID or SSID is used, the number of channels in the scan command |
| 448 | * will be increased to the absolute maximum |
| 449 | */ |
| 450 | *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD; |
| 451 | |
| 452 | /* Initialize the scan as un-filtered by firmware, set to TRUE below if |
| 453 | * a SSID or BSSID filter is sent in the command |
| 454 | */ |
| 455 | *pfilteredscan = 0; |
| 456 | |
| 457 | /* Initialize the scan as not being only on the current channel. If |
| 458 | * the channel list is customized, only contains one channel, and |
| 459 | * is the active channel, this is set true and data flow is not halted. |
| 460 | */ |
| 461 | *pscancurrentonly = 0; |
| 462 | |
| 463 | if (puserscanin) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 464 | /* Set the bss type scan filter, use adapter setting if unset */ |
| 465 | pscancfgout->bsstype = |
Holger Schurig | d65ead8 | 2007-08-02 13:12:12 -0400 | [diff] [blame] | 466 | puserscanin->bsstype ? puserscanin->bsstype : CMD_BSS_TYPE_ANY; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 467 | |
| 468 | /* Set the number of probes to send, use adapter setting if unset */ |
Holger Schurig | e2aa334 | 2007-08-02 13:05:53 -0400 | [diff] [blame] | 469 | numprobes = puserscanin->numprobes ? puserscanin->numprobes : 0; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 470 | |
| 471 | /* |
| 472 | * Set the BSSID filter to the incoming configuration, |
| 473 | * if non-zero. If not set, it will remain disabled (all zeros). |
| 474 | */ |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 475 | memcpy(pscancfgout->bssid, puserscanin->bssid, |
| 476 | sizeof(pscancfgout->bssid)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 477 | |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 478 | if (puserscanin->ssid_len) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 479 | pssidtlv = |
| 480 | (struct mrvlietypes_ssidparamset *) pscancfgout-> |
| 481 | tlvbuffer; |
| 482 | pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID); |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 483 | pssidtlv->header.len = cpu_to_le16(puserscanin->ssid_len); |
| 484 | memcpy(pssidtlv->ssid, puserscanin->ssid, |
| 485 | puserscanin->ssid_len); |
| 486 | ptlvpos += sizeof(pssidtlv->header) + puserscanin->ssid_len; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 487 | } |
| 488 | |
| 489 | /* |
| 490 | * The default number of channels sent in the command is low to |
| 491 | * ensure the response buffer from the firmware does not truncate |
| 492 | * scan results. That is not an issue with an SSID or BSSID |
| 493 | * filter applied to the scan results in the firmware. |
| 494 | */ |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 495 | if ( puserscanin->ssid_len |
| 496 | || (compare_ether_addr(pscancfgout->bssid, &zeromac[0]) != 0)) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 497 | *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN; |
| 498 | *pfilteredscan = 1; |
| 499 | } |
| 500 | } else { |
Holger Schurig | d65ead8 | 2007-08-02 13:12:12 -0400 | [diff] [blame] | 501 | pscancfgout->bsstype = CMD_BSS_TYPE_ANY; |
Holger Schurig | e2aa334 | 2007-08-02 13:05:53 -0400 | [diff] [blame] | 502 | numprobes = 0; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | /* If the input config or adapter has the number of Probes set, add tlv */ |
| 506 | if (numprobes) { |
| 507 | pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos; |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 508 | pnumprobestlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); |
| 509 | pnumprobestlv->header.len = cpu_to_le16(2); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 510 | pnumprobestlv->numprobes = cpu_to_le16(numprobes); |
| 511 | |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 512 | ptlvpos += sizeof(*pnumprobestlv); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | /* |
| 516 | * Set the output for the channel TLV to the address in the tlv buffer |
| 517 | * past any TLVs that were added in this fuction (SSID, numprobes). |
| 518 | * channel TLVs will be added past this for each scan command, preserving |
| 519 | * the TLVs that were previously added. |
| 520 | */ |
| 521 | *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos; |
| 522 | |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 523 | if (!puserscanin || !puserscanin->chanlist[0].channumber) { |
| 524 | /* Create a default channel scan list */ |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 525 | lbs_deb_scan("creating full region channel list\n"); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 526 | wlan_scan_create_channel_list(priv, pscanchanlist, |
| 527 | *pfilteredscan); |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 528 | goto out; |
| 529 | } |
| 530 | |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 531 | for (chanidx = 0; |
| 532 | chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX |
| 533 | && puserscanin->chanlist[chanidx].channumber; chanidx++) { |
| 534 | |
| 535 | channel = puserscanin->chanlist[chanidx].channumber; |
| 536 | (pscanchanlist + chanidx)->channumber = channel; |
| 537 | |
| 538 | radiotype = puserscanin->chanlist[chanidx].radiotype; |
| 539 | (pscanchanlist + chanidx)->radiotype = radiotype; |
| 540 | |
| 541 | scantype = puserscanin->chanlist[chanidx].scantype; |
| 542 | |
| 543 | if (scantype == CMD_SCAN_TYPE_PASSIVE) { |
| 544 | (pscanchanlist + |
| 545 | chanidx)->chanscanmode.passivescan = 1; |
| 546 | } else { |
| 547 | (pscanchanlist + |
| 548 | chanidx)->chanscanmode.passivescan = 0; |
| 549 | } |
| 550 | |
| 551 | if (puserscanin->chanlist[chanidx].scantime) { |
| 552 | scandur = puserscanin->chanlist[chanidx].scantime; |
| 553 | } else { |
| 554 | if (scantype == CMD_SCAN_TYPE_PASSIVE) { |
| 555 | scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME; |
| 556 | } else { |
| 557 | scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME; |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | (pscanchanlist + chanidx)->minscantime = |
| 562 | cpu_to_le16(scandur); |
| 563 | (pscanchanlist + chanidx)->maxscantime = |
| 564 | cpu_to_le16(scandur); |
| 565 | } |
| 566 | |
| 567 | /* Check if we are only scanning the current channel */ |
| 568 | if ((chanidx == 1) && |
| 569 | (puserscanin->chanlist[0].channumber == |
| 570 | priv->adapter->curbssparams.channel)) { |
| 571 | *pscancurrentonly = 1; |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 572 | lbs_deb_scan("scanning current channel only"); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | out: |
| 576 | return pscancfgout; |
| 577 | } |
| 578 | |
| 579 | /** |
| 580 | * @brief Construct and send multiple scan config commands to the firmware |
| 581 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 582 | * Only used from wlan_scan_networks() |
| 583 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 584 | * Previous routines have created a wlan_scan_cmd_config with any requested |
| 585 | * TLVs. This function splits the channel TLV into maxchanperscan lists |
| 586 | * and sends the portion of the channel TLV along with the other TLVs |
| 587 | * to the wlan_cmd routines for execution in the firmware. |
| 588 | * |
| 589 | * @param priv A pointer to wlan_private structure |
| 590 | * @param maxchanperscan Maximum number channels to be included in each |
| 591 | * scan command sent to firmware |
| 592 | * @param filteredscan Flag indicating whether or not a BSSID or SSID |
| 593 | * filter is being used for the firmware command |
| 594 | * scan command sent to firmware |
| 595 | * @param pscancfgout Scan configuration used for this scan. |
| 596 | * @param pchantlvout Pointer in the pscancfgout where the channel TLV |
| 597 | * should start. This is past any other TLVs that |
| 598 | * must be sent down in each firmware command. |
| 599 | * @param pscanchanlist List of channels to scan in maxchanperscan segments |
| 600 | * |
| 601 | * @return 0 or error return otherwise |
| 602 | */ |
| 603 | static int wlan_scan_channel_list(wlan_private * priv, |
| 604 | int maxchanperscan, |
| 605 | u8 filteredscan, |
| 606 | struct wlan_scan_cmd_config * pscancfgout, |
| 607 | struct mrvlietypes_chanlistparamset * pchantlvout, |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 608 | struct chanscanparamset * pscanchanlist, |
Marcelo Tosatti | 2be9219 | 2007-05-25 00:33:28 -0400 | [diff] [blame] | 609 | const struct wlan_ioctl_user_scan_cfg * puserscanin, |
| 610 | int full_scan) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 611 | { |
| 612 | struct chanscanparamset *ptmpchan; |
| 613 | struct chanscanparamset *pstartchan; |
| 614 | u8 scanband; |
| 615 | int doneearly; |
| 616 | int tlvidx; |
| 617 | int ret = 0; |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 618 | int scanned = 0; |
| 619 | union iwreq_data wrqu; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 620 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 621 | lbs_deb_enter_args(LBS_DEB_SCAN, "maxchanperscan %d, filteredscan %d, " |
| 622 | "full_scan %d", maxchanperscan, filteredscan, full_scan); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 623 | |
Holger Schurig | 314a886 | 2007-10-08 12:20:04 +0200 | [diff] [blame] | 624 | if (!pscancfgout || !pchantlvout || !pscanchanlist) { |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 625 | lbs_deb_scan("pscancfgout, pchantlvout or " |
| 626 | "pscanchanlist is NULL\n"); |
| 627 | ret = -1; |
| 628 | goto out; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); |
| 632 | |
| 633 | /* Set the temp channel struct pointer to the start of the desired list */ |
| 634 | ptmpchan = pscanchanlist; |
| 635 | |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 636 | if (priv->adapter->last_scanned_channel && !puserscanin) |
| 637 | ptmpchan += priv->adapter->last_scanned_channel; |
| 638 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 639 | /* Loop through the desired channel list, sending a new firmware scan |
| 640 | * commands for each maxchanperscan channels (or for 1,6,11 individually |
| 641 | * if configured accordingly) |
| 642 | */ |
| 643 | while (ptmpchan->channumber) { |
| 644 | |
| 645 | tlvidx = 0; |
| 646 | pchantlvout->header.len = 0; |
| 647 | scanband = ptmpchan->radiotype; |
| 648 | pstartchan = ptmpchan; |
| 649 | doneearly = 0; |
| 650 | |
| 651 | /* Construct the channel TLV for the scan command. Continue to |
| 652 | * insert channel TLVs until: |
| 653 | * - the tlvidx hits the maximum configured per scan command |
| 654 | * - the next channel to insert is 0 (end of desired channel list) |
| 655 | * - doneearly is set (controlling individual scanning of 1,6,11) |
| 656 | */ |
| 657 | while (tlvidx < maxchanperscan && ptmpchan->channumber |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 658 | && !doneearly && scanned < 2) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 659 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 660 | lbs_deb_scan("channel %d, radio %d, passive %d, " |
| 661 | "dischanflt %d, maxscantime %d\n", |
| 662 | ptmpchan->channumber, |
| 663 | ptmpchan->radiotype, |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 664 | ptmpchan->chanscanmode.passivescan, |
| 665 | ptmpchan->chanscanmode.disablechanfilt, |
| 666 | ptmpchan->maxscantime); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 667 | |
| 668 | /* Copy the current channel TLV to the command being prepared */ |
| 669 | memcpy(pchantlvout->chanscanparam + tlvidx, |
| 670 | ptmpchan, sizeof(pchantlvout->chanscanparam)); |
| 671 | |
| 672 | /* Increment the TLV header length by the size appended */ |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 673 | /* Ew, it would be _so_ nice if we could just declare the |
| 674 | variable little-endian and let GCC handle it for us */ |
| 675 | pchantlvout->header.len = |
| 676 | cpu_to_le16(le16_to_cpu(pchantlvout->header.len) + |
| 677 | sizeof(pchantlvout->chanscanparam)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 678 | |
| 679 | /* |
| 680 | * The tlv buffer length is set to the number of bytes of the |
| 681 | * between the channel tlv pointer and the start of the |
| 682 | * tlv buffer. This compensates for any TLVs that were appended |
| 683 | * before the channel list. |
| 684 | */ |
| 685 | pscancfgout->tlvbufferlen = ((u8 *) pchantlvout |
| 686 | - pscancfgout->tlvbuffer); |
| 687 | |
| 688 | /* Add the size of the channel tlv header and the data length */ |
| 689 | pscancfgout->tlvbufferlen += |
| 690 | (sizeof(pchantlvout->header) |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 691 | + le16_to_cpu(pchantlvout->header.len)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 692 | |
| 693 | /* Increment the index to the channel tlv we are constructing */ |
| 694 | tlvidx++; |
| 695 | |
| 696 | doneearly = 0; |
| 697 | |
| 698 | /* Stop the loop if the *current* channel is in the 1,6,11 set |
| 699 | * and we are not filtering on a BSSID or SSID. |
| 700 | */ |
| 701 | if (!filteredscan && (ptmpchan->channumber == 1 |
| 702 | || ptmpchan->channumber == 6 |
| 703 | || ptmpchan->channumber == 11)) { |
| 704 | doneearly = 1; |
| 705 | } |
| 706 | |
| 707 | /* Increment the tmp pointer to the next channel to be scanned */ |
| 708 | ptmpchan++; |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 709 | scanned++; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 710 | |
| 711 | /* Stop the loop if the *next* channel is in the 1,6,11 set. |
| 712 | * This will cause it to be the only channel scanned on the next |
| 713 | * interation |
| 714 | */ |
| 715 | if (!filteredscan && (ptmpchan->channumber == 1 |
| 716 | || ptmpchan->channumber == 6 |
| 717 | || ptmpchan->channumber == 11)) { |
| 718 | doneearly = 1; |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | /* Send the scan command to the firmware with the specified cfg */ |
Dan Williams | 0aef64d | 2007-08-02 11:31:18 -0400 | [diff] [blame] | 723 | ret = libertas_prepare_and_send_command(priv, CMD_802_11_SCAN, 0, |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 724 | 0, 0, pscancfgout); |
Marcelo Tosatti | 2be9219 | 2007-05-25 00:33:28 -0400 | [diff] [blame] | 725 | if (scanned >= 2 && !full_scan) { |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 726 | ret = 0; |
| 727 | goto done; |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 728 | } |
Marcelo Tosatti | 2be9219 | 2007-05-25 00:33:28 -0400 | [diff] [blame] | 729 | scanned = 0; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 730 | } |
| 731 | |
Dan Williams | d9ad2f5 | 2007-05-25 22:38:41 -0400 | [diff] [blame] | 732 | done: |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 733 | priv->adapter->last_scanned_channel = ptmpchan->channumber; |
| 734 | |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 735 | if (priv->adapter->last_scanned_channel) { |
| 736 | /* Schedule the next part of the partial scan */ |
| 737 | if (!full_scan && !priv->adapter->surpriseremoved) { |
| 738 | cancel_delayed_work(&priv->scan_work); |
| 739 | queue_delayed_work(priv->work_thread, &priv->scan_work, |
| 740 | msecs_to_jiffies(300)); |
| 741 | } |
| 742 | } else { |
| 743 | /* All done, tell userspace the scan table has been updated */ |
| 744 | memset(&wrqu, 0, sizeof(union iwreq_data)); |
| 745 | wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL); |
| 746 | } |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 747 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 748 | out: |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 749 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 750 | return ret; |
| 751 | } |
| 752 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 753 | /* |
| 754 | * Only used from wlan_scan_networks() |
| 755 | */ |
| 756 | static void clear_selected_scan_list_entries(wlan_adapter *adapter, |
| 757 | const struct wlan_ioctl_user_scan_cfg *scan_cfg) |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 758 | { |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 759 | struct bss_descriptor *bss; |
| 760 | struct bss_descriptor *safe; |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 761 | u32 clear_ssid_flag = 0, clear_bssid_flag = 0; |
| 762 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 763 | lbs_deb_enter(LBS_DEB_SCAN); |
| 764 | |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 765 | if (!scan_cfg) |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 766 | goto out; |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 767 | |
| 768 | if (scan_cfg->clear_ssid && scan_cfg->ssid_len) |
| 769 | clear_ssid_flag = 1; |
| 770 | |
| 771 | if (scan_cfg->clear_bssid |
| 772 | && (compare_ether_addr(scan_cfg->bssid, &zeromac[0]) != 0) |
| 773 | && (compare_ether_addr(scan_cfg->bssid, &bcastmac[0]) != 0)) { |
| 774 | clear_bssid_flag = 1; |
| 775 | } |
| 776 | |
| 777 | if (!clear_ssid_flag && !clear_bssid_flag) |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 778 | goto out; |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 779 | |
| 780 | mutex_lock(&adapter->lock); |
| 781 | list_for_each_entry_safe (bss, safe, &adapter->network_list, list) { |
| 782 | u32 clear = 0; |
| 783 | |
| 784 | /* Check for an SSID match */ |
| 785 | if ( clear_ssid_flag |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 786 | && (bss->ssid_len == scan_cfg->ssid_len) |
| 787 | && !memcmp(bss->ssid, scan_cfg->ssid, bss->ssid_len)) |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 788 | clear = 1; |
| 789 | |
| 790 | /* Check for a BSSID match */ |
| 791 | if ( clear_bssid_flag |
| 792 | && !compare_ether_addr(bss->bssid, scan_cfg->bssid)) |
| 793 | clear = 1; |
| 794 | |
| 795 | if (clear) { |
| 796 | list_move_tail (&bss->list, &adapter->network_free_list); |
| 797 | clear_bss_descriptor(bss); |
| 798 | } |
| 799 | } |
| 800 | mutex_unlock(&adapter->lock); |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 801 | out: |
| 802 | lbs_deb_leave(LBS_DEB_SCAN); |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 803 | } |
| 804 | |
| 805 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 806 | /** |
| 807 | * @brief Internal function used to start a scan based on an input config |
| 808 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 809 | * Also used from debugfs |
| 810 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 811 | * Use the input user scan configuration information when provided in |
| 812 | * order to send the appropriate scan commands to firmware to populate or |
| 813 | * update the internal driver scan table |
| 814 | * |
| 815 | * @param priv A pointer to wlan_private structure |
| 816 | * @param puserscanin Pointer to the input configuration for the requested |
| 817 | * scan. |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 818 | * @param full_scan ??? |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 819 | * |
| 820 | * @return 0 or < 0 if error |
| 821 | */ |
| 822 | int wlan_scan_networks(wlan_private * priv, |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 823 | const struct wlan_ioctl_user_scan_cfg * puserscanin, |
| 824 | int full_scan) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 825 | { |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 826 | wlan_adapter * adapter = priv->adapter; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 827 | struct mrvlietypes_chanlistparamset *pchantlvout; |
| 828 | struct chanscanparamset * scan_chan_list = NULL; |
| 829 | struct wlan_scan_cmd_config * scan_cfg = NULL; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 830 | u8 filteredscan; |
| 831 | u8 scancurrentchanonly; |
| 832 | int maxchanperscan; |
| 833 | int ret; |
Dan Williams | f8f5510 | 2007-05-30 10:12:55 -0400 | [diff] [blame] | 834 | #ifdef CONFIG_LIBERTAS_DEBUG |
| 835 | struct bss_descriptor * iter_bss; |
| 836 | int i = 0; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 837 | DECLARE_MAC_BUF(mac); |
Dan Williams | f8f5510 | 2007-05-30 10:12:55 -0400 | [diff] [blame] | 838 | #endif |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 839 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 840 | lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", full_scan); |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 841 | |
| 842 | /* Cancel any partial outstanding partial scans if this scan |
| 843 | * is a full scan. |
| 844 | */ |
| 845 | if (full_scan && delayed_work_pending(&priv->scan_work)) |
| 846 | cancel_delayed_work(&priv->scan_work); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 847 | |
| 848 | scan_chan_list = kzalloc(sizeof(struct chanscanparamset) * |
| 849 | WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL); |
| 850 | if (scan_chan_list == NULL) { |
| 851 | ret = -ENOMEM; |
| 852 | goto out; |
| 853 | } |
| 854 | |
| 855 | scan_cfg = wlan_scan_setup_scan_config(priv, |
| 856 | puserscanin, |
| 857 | &pchantlvout, |
| 858 | scan_chan_list, |
| 859 | &maxchanperscan, |
| 860 | &filteredscan, |
| 861 | &scancurrentchanonly); |
| 862 | if (scan_cfg == NULL) { |
| 863 | ret = -ENOMEM; |
| 864 | goto out; |
| 865 | } |
| 866 | |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 867 | clear_selected_scan_list_entries(adapter, puserscanin); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 868 | |
| 869 | /* Keep the data path active if we are only scanning our current channel */ |
| 870 | if (!scancurrentchanonly) { |
Holger Schurig | 634b8f4 | 2007-05-25 13:05:16 -0400 | [diff] [blame] | 871 | netif_stop_queue(priv->dev); |
| 872 | netif_carrier_off(priv->dev); |
Holger Schurig | 3cf8409 | 2007-08-02 11:50:12 -0400 | [diff] [blame] | 873 | if (priv->mesh_dev) { |
| 874 | netif_stop_queue(priv->mesh_dev); |
| 875 | netif_carrier_off(priv->mesh_dev); |
| 876 | } |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 877 | } |
| 878 | |
| 879 | ret = wlan_scan_channel_list(priv, |
| 880 | maxchanperscan, |
| 881 | filteredscan, |
| 882 | scan_cfg, |
| 883 | pchantlvout, |
Marcelo Tosatti | 064827e | 2007-05-24 23:37:28 -0400 | [diff] [blame] | 884 | scan_chan_list, |
Marcelo Tosatti | 2be9219 | 2007-05-25 00:33:28 -0400 | [diff] [blame] | 885 | puserscanin, |
| 886 | full_scan); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 887 | |
Dan Williams | f8f5510 | 2007-05-30 10:12:55 -0400 | [diff] [blame] | 888 | #ifdef CONFIG_LIBERTAS_DEBUG |
| 889 | /* Dump the scan table */ |
| 890 | mutex_lock(&adapter->lock); |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 891 | lbs_deb_scan("The scan table contains:\n"); |
Dan Williams | f8f5510 | 2007-05-30 10:12:55 -0400 | [diff] [blame] | 892 | list_for_each_entry (iter_bss, &adapter->network_list, list) { |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 893 | lbs_deb_scan("scan %02d, %s, RSSI, %d, SSID '%s'\n", |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 894 | i++, print_mac(mac, iter_bss->bssid), (s32) iter_bss->rssi, |
Dan Williams | f8f5510 | 2007-05-30 10:12:55 -0400 | [diff] [blame] | 895 | escape_essid(iter_bss->ssid, iter_bss->ssid_len)); |
| 896 | } |
| 897 | mutex_unlock(&adapter->lock); |
| 898 | #endif |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 899 | |
Dan Williams | 0aef64d | 2007-08-02 11:31:18 -0400 | [diff] [blame] | 900 | if (priv->adapter->connect_status == LIBERTAS_CONNECTED) { |
Holger Schurig | 634b8f4 | 2007-05-25 13:05:16 -0400 | [diff] [blame] | 901 | netif_carrier_on(priv->dev); |
| 902 | netif_wake_queue(priv->dev); |
Holger Schurig | 3cf8409 | 2007-08-02 11:50:12 -0400 | [diff] [blame] | 903 | if (priv->mesh_dev) { |
| 904 | netif_carrier_on(priv->mesh_dev); |
| 905 | netif_wake_queue(priv->mesh_dev); |
| 906 | } |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | out: |
| 910 | if (scan_cfg) |
| 911 | kfree(scan_cfg); |
| 912 | |
| 913 | if (scan_chan_list) |
| 914 | kfree(scan_chan_list); |
| 915 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 916 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 917 | return ret; |
| 918 | } |
| 919 | |
| 920 | /** |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 921 | * @brief Interpret a BSS scan response returned from the firmware |
| 922 | * |
| 923 | * Parse the various fixed fields and IEs passed back for a a BSS probe |
| 924 | * response or beacon from the scan command. Record information as needed |
| 925 | * in the scan table struct bss_descriptor for that entry. |
| 926 | * |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 927 | * @param bss Output parameter: Pointer to the BSS Entry |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 928 | * |
| 929 | * @return 0 or -1 |
| 930 | */ |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 931 | static int libertas_process_bss(struct bss_descriptor * bss, |
| 932 | u8 ** pbeaconinfo, int *bytesleft) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 933 | { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 934 | struct ieeetypes_fhparamset *pFH; |
| 935 | struct ieeetypes_dsparamset *pDS; |
| 936 | struct ieeetypes_cfparamset *pCF; |
| 937 | struct ieeetypes_ibssparamset *pibss; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 938 | DECLARE_MAC_BUF(mac); |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 939 | struct ieeetypes_countryinfoset *pcountryinfo; |
| 940 | u8 *pos, *end, *p; |
| 941 | u8 n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0; |
| 942 | u16 beaconsize = 0; |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 943 | int ret; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 944 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 945 | lbs_deb_enter(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 946 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 947 | if (*bytesleft >= sizeof(beaconsize)) { |
| 948 | /* Extract & convert beacon size from the command buffer */ |
Vladimir Davydov | ac630c2 | 2007-09-06 21:45:36 -0400 | [diff] [blame] | 949 | beaconsize = le16_to_cpu(get_unaligned((u16 *)*pbeaconinfo)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 950 | *bytesleft -= sizeof(beaconsize); |
| 951 | *pbeaconinfo += sizeof(beaconsize); |
| 952 | } |
| 953 | |
| 954 | if (beaconsize == 0 || beaconsize > *bytesleft) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 955 | *pbeaconinfo += *bytesleft; |
| 956 | *bytesleft = 0; |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 957 | ret = -1; |
| 958 | goto done; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | /* Initialize the current working beacon pointer for this BSS iteration */ |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 962 | pos = *pbeaconinfo; |
| 963 | end = pos + beaconsize; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 964 | |
| 965 | /* Advance the return beacon pointer past the current beacon */ |
| 966 | *pbeaconinfo += beaconsize; |
| 967 | *bytesleft -= beaconsize; |
| 968 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 969 | memcpy(bss->bssid, pos, ETH_ALEN); |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 970 | lbs_deb_scan("process_bss: AP BSSID %s\n", print_mac(mac, bss->bssid)); |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 971 | pos += ETH_ALEN; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 972 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 973 | if ((end - pos) < 12) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 974 | lbs_deb_scan("process_bss: Not enough bytes left\n"); |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 975 | ret = -1; |
| 976 | goto done; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | /* |
| 980 | * next 4 fields are RSSI, time stamp, beacon interval, |
| 981 | * and capability information |
| 982 | */ |
| 983 | |
| 984 | /* RSSI is 1 byte long */ |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 985 | bss->rssi = *pos; |
| 986 | lbs_deb_scan("process_bss: RSSI=%02X\n", *pos); |
| 987 | pos++; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 988 | |
| 989 | /* time stamp is 8 bytes long */ |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 990 | pos += 8; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 991 | |
| 992 | /* beacon interval is 2 bytes long */ |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 993 | bss->beaconperiod = le16_to_cpup((void *) pos); |
| 994 | pos += 2; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 995 | |
| 996 | /* capability information is 2 bytes long */ |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 997 | bss->capability = le16_to_cpup((void *) pos); |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 998 | lbs_deb_scan("process_bss: capabilities = 0x%4X\n", bss->capability); |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 999 | pos += 2; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1000 | |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 1001 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) |
| 1002 | lbs_deb_scan("process_bss: AP WEP enabled\n"); |
| 1003 | if (bss->capability & WLAN_CAPABILITY_IBSS) |
| 1004 | bss->mode = IW_MODE_ADHOC; |
| 1005 | else |
| 1006 | bss->mode = IW_MODE_INFRA; |
| 1007 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1008 | /* rest of the current buffer are IE's */ |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1009 | lbs_deb_scan("process_bss: IE length for this AP = %zd\n", end - pos); |
Holger Schurig | ece5619 | 2007-08-02 11:53:06 -0400 | [diff] [blame] | 1010 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1011 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1012 | /* process variable IE */ |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1013 | while (pos <= end - 2) { |
| 1014 | struct ieee80211_info_element * elem = |
| 1015 | (struct ieee80211_info_element *) pos; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1016 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1017 | if (pos + elem->len > end) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1018 | lbs_deb_scan("process_bss: error in processing IE, " |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1019 | "bytes left < IE length\n"); |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1020 | break; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1021 | } |
| 1022 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1023 | switch (elem->id) { |
| 1024 | case MFIE_TYPE_SSID: |
| 1025 | bss->ssid_len = elem->len; |
| 1026 | memcpy(bss->ssid, elem->data, elem->len); |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1027 | lbs_deb_scan("ssid '%s', ssid length %u\n", |
| 1028 | escape_essid(bss->ssid, bss->ssid_len), |
| 1029 | bss->ssid_len); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1030 | break; |
| 1031 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1032 | case MFIE_TYPE_RATES: |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 1033 | n_basic_rates = min_t(u8, MAX_RATES, elem->len); |
| 1034 | memcpy(bss->rates, elem->data, n_basic_rates); |
| 1035 | got_basic_rates = 1; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1036 | break; |
| 1037 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1038 | case MFIE_TYPE_FH_SET: |
| 1039 | pFH = (struct ieeetypes_fhparamset *) pos; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1040 | memmove(&bss->phyparamset.fhparamset, pFH, |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1041 | sizeof(struct ieeetypes_fhparamset)); |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 1042 | #if 0 /* I think we can store these LE */ |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1043 | bss->phyparamset.fhparamset.dwelltime |
| 1044 | = le16_to_cpu(bss->phyparamset.fhparamset.dwelltime); |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 1045 | #endif |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1046 | break; |
| 1047 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1048 | case MFIE_TYPE_DS_SET: |
| 1049 | pDS = (struct ieeetypes_dsparamset *) pos; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1050 | bss->channel = pDS->currentchan; |
| 1051 | memcpy(&bss->phyparamset.dsparamset, pDS, |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1052 | sizeof(struct ieeetypes_dsparamset)); |
| 1053 | break; |
| 1054 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1055 | case MFIE_TYPE_CF_SET: |
| 1056 | pCF = (struct ieeetypes_cfparamset *) pos; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1057 | memcpy(&bss->ssparamset.cfparamset, pCF, |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1058 | sizeof(struct ieeetypes_cfparamset)); |
| 1059 | break; |
| 1060 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1061 | case MFIE_TYPE_IBSS_SET: |
| 1062 | pibss = (struct ieeetypes_ibssparamset *) pos; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1063 | bss->atimwindow = le32_to_cpu(pibss->atimwindow); |
| 1064 | memmove(&bss->ssparamset.ibssparamset, pibss, |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1065 | sizeof(struct ieeetypes_ibssparamset)); |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 1066 | #if 0 |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1067 | bss->ssparamset.ibssparamset.atimwindow |
| 1068 | = le16_to_cpu(bss->ssparamset.ibssparamset.atimwindow); |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 1069 | #endif |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1070 | break; |
| 1071 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1072 | case MFIE_TYPE_COUNTRY: |
| 1073 | pcountryinfo = (struct ieeetypes_countryinfoset *) pos; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1074 | if (pcountryinfo->len < sizeof(pcountryinfo->countrycode) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1075 | || pcountryinfo->len > 254) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1076 | lbs_deb_scan("process_bss: 11D- Err " |
Dan Williams | 4269e2a | 2007-05-10 23:10:18 -0400 | [diff] [blame] | 1077 | "CountryInfo len =%d min=%zd max=254\n", |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1078 | pcountryinfo->len, |
| 1079 | sizeof(pcountryinfo->countrycode)); |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1080 | ret = -1; |
| 1081 | goto done; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1082 | } |
| 1083 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1084 | memcpy(&bss->countryinfo, |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1085 | pcountryinfo, pcountryinfo->len + 2); |
Holger Schurig | ece5619 | 2007-08-02 11:53:06 -0400 | [diff] [blame] | 1086 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: 11d countryinfo", |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1087 | (u8 *) pcountryinfo, |
| 1088 | (u32) (pcountryinfo->len + 2)); |
| 1089 | break; |
| 1090 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1091 | case MFIE_TYPE_RATES_EX: |
| 1092 | /* only process extended supported rate if data rate is |
| 1093 | * already found. Data rate IE should come before |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1094 | * extended supported rate IE |
| 1095 | */ |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 1096 | if (!got_basic_rates) |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1097 | break; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1098 | |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 1099 | n_ex_rates = elem->len; |
| 1100 | if (n_basic_rates + n_ex_rates > MAX_RATES) |
| 1101 | n_ex_rates = MAX_RATES - n_basic_rates; |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1102 | |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 1103 | p = bss->rates + n_basic_rates; |
| 1104 | memcpy(p, elem->data, n_ex_rates); |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1105 | break; |
| 1106 | |
| 1107 | case MFIE_TYPE_GENERIC: |
| 1108 | if (elem->len >= 4 && |
| 1109 | elem->data[0] == 0x00 && |
| 1110 | elem->data[1] == 0x50 && |
| 1111 | elem->data[2] == 0xf2 && |
| 1112 | elem->data[3] == 0x01) { |
| 1113 | bss->wpa_ie_len = min(elem->len + 2, |
| 1114 | MAX_WPA_IE_LEN); |
| 1115 | memcpy(bss->wpa_ie, elem, bss->wpa_ie_len); |
Holger Schurig | ece5619 | 2007-08-02 11:53:06 -0400 | [diff] [blame] | 1116 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: WPA IE", bss->wpa_ie, |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1117 | elem->len); |
Luis Carlos Cobo | 1e838bf | 2007-08-02 10:51:27 -0400 | [diff] [blame] | 1118 | } else if (elem->len >= MARVELL_MESH_IE_LENGTH && |
| 1119 | elem->data[0] == 0x00 && |
| 1120 | elem->data[1] == 0x50 && |
| 1121 | elem->data[2] == 0x43 && |
| 1122 | elem->data[3] == 0x04) { |
| 1123 | bss->mesh = 1; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1124 | } |
| 1125 | break; |
| 1126 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1127 | case MFIE_TYPE_RSN: |
| 1128 | bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN); |
| 1129 | memcpy(bss->rsn_ie, elem, bss->rsn_ie_len); |
Holger Schurig | ece5619 | 2007-08-02 11:53:06 -0400 | [diff] [blame] | 1130 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", bss->rsn_ie, elem->len); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1131 | break; |
| 1132 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1133 | default: |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1134 | break; |
| 1135 | } |
| 1136 | |
Dan Williams | ab61797 | 2007-08-02 10:48:02 -0400 | [diff] [blame] | 1137 | pos += elem->len + 2; |
| 1138 | } |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1139 | |
| 1140 | /* Timestamp */ |
| 1141 | bss->last_scanned = jiffies; |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 1142 | libertas_unset_basic_rate_flags(bss->rates, sizeof(bss->rates)); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1143 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1144 | ret = 0; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1145 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1146 | done: |
| 1147 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
| 1148 | return ret; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1149 | } |
| 1150 | |
| 1151 | /** |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1152 | * @brief This function finds a specific compatible BSSID in the scan list |
| 1153 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1154 | * Used in association code |
| 1155 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1156 | * @param adapter A pointer to wlan_adapter |
| 1157 | * @param bssid BSSID to find in the scan list |
| 1158 | * @param mode Network mode: Infrastructure or IBSS |
| 1159 | * |
| 1160 | * @return index in BSSID list, or error return code (< 0) |
| 1161 | */ |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1162 | struct bss_descriptor *libertas_find_bssid_in_list(wlan_adapter * adapter, |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1163 | u8 * bssid, u8 mode) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1164 | { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1165 | struct bss_descriptor * iter_bss; |
| 1166 | struct bss_descriptor * found_bss = NULL; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1167 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1168 | lbs_deb_enter(LBS_DEB_SCAN); |
| 1169 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1170 | if (!bssid) |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1171 | goto out; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1172 | |
Holger Schurig | ece5619 | 2007-08-02 11:53:06 -0400 | [diff] [blame] | 1173 | lbs_deb_hex(LBS_DEB_SCAN, "looking for", |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1174 | bssid, ETH_ALEN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1175 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1176 | /* Look through the scan table for a compatible match. The loop will |
| 1177 | * continue past a matched bssid that is not compatible in case there |
| 1178 | * is an AP with multiple SSIDs assigned to the same BSSID |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1179 | */ |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1180 | mutex_lock(&adapter->lock); |
| 1181 | list_for_each_entry (iter_bss, &adapter->network_list, list) { |
Dan Williams | 3cf20931 | 2007-05-25 17:28:30 -0400 | [diff] [blame] | 1182 | if (compare_ether_addr(iter_bss->bssid, bssid)) |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1183 | continue; /* bssid doesn't match */ |
| 1184 | switch (mode) { |
| 1185 | case IW_MODE_INFRA: |
| 1186 | case IW_MODE_ADHOC: |
| 1187 | if (!is_network_compatible(adapter, iter_bss, mode)) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1188 | break; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1189 | found_bss = iter_bss; |
| 1190 | break; |
| 1191 | default: |
| 1192 | found_bss = iter_bss; |
| 1193 | break; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1194 | } |
| 1195 | } |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1196 | mutex_unlock(&adapter->lock); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1197 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1198 | out: |
| 1199 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1200 | return found_bss; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1201 | } |
| 1202 | |
| 1203 | /** |
| 1204 | * @brief This function finds ssid in ssid list. |
| 1205 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1206 | * Used in association code |
| 1207 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1208 | * @param adapter A pointer to wlan_adapter |
| 1209 | * @param ssid SSID to find in the list |
| 1210 | * @param bssid BSSID to qualify the SSID selection (if provided) |
| 1211 | * @param mode Network mode: Infrastructure or IBSS |
| 1212 | * |
| 1213 | * @return index in BSSID list |
| 1214 | */ |
Dan Williams | 717c933 | 2007-05-29 00:03:31 -0400 | [diff] [blame] | 1215 | struct bss_descriptor * libertas_find_ssid_in_list(wlan_adapter * adapter, |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1216 | u8 *ssid, u8 ssid_len, u8 * bssid, u8 mode, |
Dan Williams | aeea0ab | 2007-05-25 22:30:48 -0400 | [diff] [blame] | 1217 | int channel) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1218 | { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1219 | u8 bestrssi = 0; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1220 | struct bss_descriptor * iter_bss = NULL; |
| 1221 | struct bss_descriptor * found_bss = NULL; |
| 1222 | struct bss_descriptor * tmp_oldest = NULL; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1223 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1224 | lbs_deb_enter(LBS_DEB_SCAN); |
| 1225 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1226 | mutex_lock(&adapter->lock); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1227 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1228 | list_for_each_entry (iter_bss, &adapter->network_list, list) { |
| 1229 | if ( !tmp_oldest |
| 1230 | || (iter_bss->last_scanned < tmp_oldest->last_scanned)) |
| 1231 | tmp_oldest = iter_bss; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1232 | |
Dan Williams | 717c933 | 2007-05-29 00:03:31 -0400 | [diff] [blame] | 1233 | if (libertas_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len, |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1234 | ssid, ssid_len) != 0) |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1235 | continue; /* ssid doesn't match */ |
Dan Williams | 3cf20931 | 2007-05-25 17:28:30 -0400 | [diff] [blame] | 1236 | if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0) |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1237 | continue; /* bssid doesn't match */ |
Dan Williams | aeea0ab | 2007-05-25 22:30:48 -0400 | [diff] [blame] | 1238 | if ((channel > 0) && (iter_bss->channel != channel)) |
| 1239 | continue; /* channel doesn't match */ |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1240 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1241 | switch (mode) { |
| 1242 | case IW_MODE_INFRA: |
| 1243 | case IW_MODE_ADHOC: |
| 1244 | if (!is_network_compatible(adapter, iter_bss, mode)) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1245 | break; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1246 | |
| 1247 | if (bssid) { |
| 1248 | /* Found requested BSSID */ |
| 1249 | found_bss = iter_bss; |
| 1250 | goto out; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1251 | } |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1252 | |
| 1253 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { |
| 1254 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1255 | found_bss = iter_bss; |
| 1256 | } |
| 1257 | break; |
| 1258 | case IW_MODE_AUTO: |
| 1259 | default: |
| 1260 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { |
| 1261 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1262 | found_bss = iter_bss; |
| 1263 | } |
| 1264 | break; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1265 | } |
| 1266 | } |
| 1267 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1268 | out: |
| 1269 | mutex_unlock(&adapter->lock); |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1270 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1271 | return found_bss; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1272 | } |
| 1273 | |
| 1274 | /** |
| 1275 | * @brief This function finds the best SSID in the Scan List |
| 1276 | * |
| 1277 | * Search the scan table for the best SSID that also matches the current |
| 1278 | * adapter network preference (infrastructure or adhoc) |
| 1279 | * |
| 1280 | * @param adapter A pointer to wlan_adapter |
| 1281 | * |
| 1282 | * @return index in BSSID list |
| 1283 | */ |
Holger Schurig | ac558ca | 2007-08-02 11:49:06 -0400 | [diff] [blame] | 1284 | static struct bss_descriptor * libertas_find_best_ssid_in_list(wlan_adapter * adapter, |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1285 | u8 mode) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1286 | { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1287 | u8 bestrssi = 0; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1288 | struct bss_descriptor * iter_bss; |
| 1289 | struct bss_descriptor * best_bss = NULL; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1290 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1291 | lbs_deb_enter(LBS_DEB_SCAN); |
| 1292 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1293 | mutex_lock(&adapter->lock); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1294 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1295 | list_for_each_entry (iter_bss, &adapter->network_list, list) { |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1296 | switch (mode) { |
Dan Williams | 0dc5a29 | 2007-05-10 22:58:02 -0400 | [diff] [blame] | 1297 | case IW_MODE_INFRA: |
| 1298 | case IW_MODE_ADHOC: |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1299 | if (!is_network_compatible(adapter, iter_bss, mode)) |
| 1300 | break; |
| 1301 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) |
| 1302 | break; |
| 1303 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1304 | best_bss = iter_bss; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1305 | break; |
Dan Williams | 0dc5a29 | 2007-05-10 22:58:02 -0400 | [diff] [blame] | 1306 | case IW_MODE_AUTO: |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1307 | default: |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1308 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) |
| 1309 | break; |
| 1310 | bestrssi = SCAN_RSSI(iter_bss->rssi); |
| 1311 | best_bss = iter_bss; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1312 | break; |
| 1313 | } |
| 1314 | } |
| 1315 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1316 | mutex_unlock(&adapter->lock); |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1317 | lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1318 | return best_bss; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1319 | } |
| 1320 | |
| 1321 | /** |
| 1322 | * @brief Find the AP with specific ssid in the scan list |
| 1323 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1324 | * Used from association worker. |
| 1325 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1326 | * @param priv A pointer to wlan_private structure |
| 1327 | * @param pSSID A pointer to AP's ssid |
| 1328 | * |
| 1329 | * @return 0--success, otherwise--fail |
| 1330 | */ |
Dan Williams | 717c933 | 2007-05-29 00:03:31 -0400 | [diff] [blame] | 1331 | int libertas_find_best_network_ssid(wlan_private * priv, |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1332 | u8 *out_ssid, u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1333 | { |
| 1334 | wlan_adapter *adapter = priv->adapter; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1335 | int ret = -1; |
| 1336 | struct bss_descriptor * found; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1337 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1338 | lbs_deb_enter(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1339 | |
Marcelo Tosatti | 2be9219 | 2007-05-25 00:33:28 -0400 | [diff] [blame] | 1340 | wlan_scan_networks(priv, NULL, 1); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1341 | if (adapter->surpriseremoved) |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1342 | goto out; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1343 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1344 | wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending); |
| 1345 | |
Dan Williams | 717c933 | 2007-05-29 00:03:31 -0400 | [diff] [blame] | 1346 | found = libertas_find_best_ssid_in_list(adapter, preferred_mode); |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1347 | if (found && (found->ssid_len > 0)) { |
| 1348 | memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE); |
| 1349 | *out_ssid_len = found->ssid_len; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1350 | *out_mode = found->mode; |
| 1351 | ret = 0; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1352 | } |
| 1353 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1354 | out: |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1355 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1356 | return ret; |
| 1357 | } |
| 1358 | |
| 1359 | /** |
| 1360 | * @brief Scan Network |
| 1361 | * |
| 1362 | * @param dev A pointer to net_device structure |
| 1363 | * @param info A pointer to iw_request_info structure |
| 1364 | * @param vwrq A pointer to iw_param structure |
| 1365 | * @param extra A pointer to extra data buf |
| 1366 | * |
| 1367 | * @return 0 --success, otherwise fail |
| 1368 | */ |
| 1369 | int libertas_set_scan(struct net_device *dev, struct iw_request_info *info, |
| 1370 | struct iw_param *vwrq, char *extra) |
| 1371 | { |
| 1372 | wlan_private *priv = dev->priv; |
| 1373 | wlan_adapter *adapter = priv->adapter; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1374 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1375 | lbs_deb_enter(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1376 | |
Dan Williams | 2afc0c5 | 2007-08-02 13:19:04 -0400 | [diff] [blame] | 1377 | if (!delayed_work_pending(&priv->scan_work)) { |
| 1378 | queue_delayed_work(priv->work_thread, &priv->scan_work, |
| 1379 | msecs_to_jiffies(50)); |
| 1380 | } |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1381 | |
| 1382 | if (adapter->surpriseremoved) |
| 1383 | return -1; |
| 1384 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1385 | lbs_deb_leave(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1386 | return 0; |
| 1387 | } |
| 1388 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1389 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1390 | /** |
| 1391 | * @brief Send a scan command for all available channels filtered on a spec |
| 1392 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1393 | * Used in association code and from debugfs |
| 1394 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1395 | * @param priv A pointer to wlan_private structure |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1396 | * @param ssid A pointer to the SSID to scan for |
| 1397 | * @param ssid_len Length of the SSID |
| 1398 | * @param clear_ssid Should existing scan results with this SSID |
| 1399 | * be cleared? |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1400 | * @param prequestedssid A pointer to AP's ssid |
| 1401 | * @param keeppreviousscan Flag used to save/clear scan table before scan |
| 1402 | * |
| 1403 | * @return 0-success, otherwise fail |
| 1404 | */ |
Dan Williams | 717c933 | 2007-05-29 00:03:31 -0400 | [diff] [blame] | 1405 | int libertas_send_specific_ssid_scan(wlan_private * priv, |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1406 | u8 *ssid, u8 ssid_len, u8 clear_ssid) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1407 | { |
| 1408 | wlan_adapter *adapter = priv->adapter; |
| 1409 | struct wlan_ioctl_user_scan_cfg scancfg; |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 1410 | int ret = 0; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1411 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1412 | lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s', clear %d", |
| 1413 | escape_essid(ssid, ssid_len), clear_ssid); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1414 | |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1415 | if (!ssid_len) |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 1416 | goto out; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1417 | |
| 1418 | memset(&scancfg, 0x00, sizeof(scancfg)); |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1419 | memcpy(scancfg.ssid, ssid, ssid_len); |
| 1420 | scancfg.ssid_len = ssid_len; |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 1421 | scancfg.clear_ssid = clear_ssid; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1422 | |
Marcelo Tosatti | 2be9219 | 2007-05-25 00:33:28 -0400 | [diff] [blame] | 1423 | wlan_scan_networks(priv, &scancfg, 1); |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1424 | if (adapter->surpriseremoved) { |
| 1425 | ret = -1; |
| 1426 | goto out; |
| 1427 | } |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1428 | wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending); |
| 1429 | |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 1430 | out: |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1431 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
Dan Williams | eb8f733 | 2007-05-25 16:25:21 -0400 | [diff] [blame] | 1432 | return ret; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1433 | } |
| 1434 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1435 | |
| 1436 | |
| 1437 | |
| 1438 | /*********************************************************************/ |
| 1439 | /* */ |
| 1440 | /* Support for Wireless Extensions */ |
| 1441 | /* */ |
| 1442 | /*********************************************************************/ |
| 1443 | |
Dan Williams | 00af015 | 2007-08-02 13:14:56 -0400 | [diff] [blame] | 1444 | #define MAX_CUSTOM_LEN 64 |
| 1445 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1446 | static inline char *libertas_translate_scan(wlan_private *priv, |
| 1447 | char *start, char *stop, |
| 1448 | struct bss_descriptor *bss) |
| 1449 | { |
| 1450 | wlan_adapter *adapter = priv->adapter; |
| 1451 | struct chan_freq_power *cfp; |
| 1452 | char *current_val; /* For rates */ |
| 1453 | struct iw_event iwe; /* Temporary buffer */ |
| 1454 | int j; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1455 | #define PERFECT_RSSI ((u8)50) |
| 1456 | #define WORST_RSSI ((u8)0) |
| 1457 | #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI)) |
| 1458 | u8 rssi; |
| 1459 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1460 | lbs_deb_enter(LBS_DEB_SCAN); |
| 1461 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1462 | cfp = libertas_find_cfp_by_band_and_channel(adapter, 0, bss->channel); |
| 1463 | if (!cfp) { |
| 1464 | lbs_deb_scan("Invalid channel number %d\n", bss->channel); |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1465 | start = NULL; |
| 1466 | goto out; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1467 | } |
| 1468 | |
| 1469 | /* First entry *MUST* be the AP BSSID */ |
| 1470 | iwe.cmd = SIOCGIWAP; |
| 1471 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; |
| 1472 | memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN); |
| 1473 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN); |
| 1474 | |
| 1475 | /* SSID */ |
| 1476 | iwe.cmd = SIOCGIWESSID; |
| 1477 | iwe.u.data.flags = 1; |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1478 | iwe.u.data.length = min((u32) bss->ssid_len, (u32) IW_ESSID_MAX_SIZE); |
| 1479 | start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1480 | |
| 1481 | /* Mode */ |
| 1482 | iwe.cmd = SIOCGIWMODE; |
| 1483 | iwe.u.mode = bss->mode; |
| 1484 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN); |
| 1485 | |
| 1486 | /* Frequency */ |
| 1487 | iwe.cmd = SIOCGIWFREQ; |
| 1488 | iwe.u.freq.m = (long)cfp->freq * 100000; |
| 1489 | iwe.u.freq.e = 1; |
| 1490 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN); |
| 1491 | |
| 1492 | /* Add quality statistics */ |
| 1493 | iwe.cmd = IWEVQUAL; |
| 1494 | iwe.u.qual.updated = IW_QUAL_ALL_UPDATED; |
| 1495 | iwe.u.qual.level = SCAN_RSSI(bss->rssi); |
| 1496 | |
| 1497 | rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE; |
| 1498 | iwe.u.qual.qual = |
| 1499 | (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) * |
| 1500 | (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) / |
| 1501 | (RSSI_DIFF * RSSI_DIFF); |
| 1502 | if (iwe.u.qual.qual > 100) |
| 1503 | iwe.u.qual.qual = 100; |
| 1504 | |
| 1505 | if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) { |
| 1506 | iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE; |
| 1507 | } else { |
| 1508 | iwe.u.qual.noise = |
| 1509 | CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]); |
| 1510 | } |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1511 | |
Dan Williams | 80e78ef | 2007-05-25 22:18:47 -0400 | [diff] [blame] | 1512 | /* Locally created ad-hoc BSSs won't have beacons if this is the |
| 1513 | * only station in the adhoc network; so get signal strength |
| 1514 | * from receive statistics. |
| 1515 | */ |
| 1516 | if ((adapter->mode == IW_MODE_ADHOC) |
| 1517 | && adapter->adhoccreate |
Dan Williams | 717c933 | 2007-05-29 00:03:31 -0400 | [diff] [blame] | 1518 | && !libertas_ssid_cmp(adapter->curbssparams.ssid, |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1519 | adapter->curbssparams.ssid_len, |
| 1520 | bss->ssid, bss->ssid_len)) { |
Dan Williams | 80e78ef | 2007-05-25 22:18:47 -0400 | [diff] [blame] | 1521 | int snr, nf; |
| 1522 | snr = adapter->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; |
| 1523 | nf = adapter->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; |
| 1524 | iwe.u.qual.level = CAL_RSSI(snr, nf); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1525 | } |
| 1526 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN); |
| 1527 | |
| 1528 | /* Add encryption capability */ |
| 1529 | iwe.cmd = SIOCGIWENCODE; |
Dan Williams | 0c9ca690 | 2007-08-02 10:43:44 -0400 | [diff] [blame] | 1530 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1531 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; |
| 1532 | } else { |
| 1533 | iwe.u.data.flags = IW_ENCODE_DISABLED; |
| 1534 | } |
| 1535 | iwe.u.data.length = 0; |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1536 | start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1537 | |
| 1538 | current_val = start + IW_EV_LCP_LEN; |
| 1539 | |
| 1540 | iwe.cmd = SIOCGIWRATE; |
| 1541 | iwe.u.bitrate.fixed = 0; |
| 1542 | iwe.u.bitrate.disabled = 0; |
| 1543 | iwe.u.bitrate.value = 0; |
| 1544 | |
Dan Williams | 8c51276 | 2007-08-02 11:40:45 -0400 | [diff] [blame] | 1545 | for (j = 0; bss->rates[j] && (j < sizeof(bss->rates)); j++) { |
| 1546 | /* Bit rate given in 500 kb/s units */ |
| 1547 | iwe.u.bitrate.value = bss->rates[j] * 500000; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1548 | current_val = iwe_stream_add_value(start, current_val, |
| 1549 | stop, &iwe, IW_EV_PARAM_LEN); |
| 1550 | } |
| 1551 | if ((bss->mode == IW_MODE_ADHOC) |
Dan Williams | 717c933 | 2007-05-29 00:03:31 -0400 | [diff] [blame] | 1552 | && !libertas_ssid_cmp(adapter->curbssparams.ssid, |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1553 | adapter->curbssparams.ssid_len, |
| 1554 | bss->ssid, bss->ssid_len) |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1555 | && adapter->adhoccreate) { |
| 1556 | iwe.u.bitrate.value = 22 * 500000; |
| 1557 | current_val = iwe_stream_add_value(start, current_val, |
| 1558 | stop, &iwe, IW_EV_PARAM_LEN); |
| 1559 | } |
| 1560 | /* Check if we added any event */ |
| 1561 | if((current_val - start) > IW_EV_LCP_LEN) |
| 1562 | start = current_val; |
| 1563 | |
| 1564 | memset(&iwe, 0, sizeof(iwe)); |
| 1565 | if (bss->wpa_ie_len) { |
| 1566 | char buf[MAX_WPA_IE_LEN]; |
| 1567 | memcpy(buf, bss->wpa_ie, bss->wpa_ie_len); |
| 1568 | iwe.cmd = IWEVGENIE; |
| 1569 | iwe.u.data.length = bss->wpa_ie_len; |
| 1570 | start = iwe_stream_add_point(start, stop, &iwe, buf); |
| 1571 | } |
| 1572 | |
| 1573 | memset(&iwe, 0, sizeof(iwe)); |
| 1574 | if (bss->rsn_ie_len) { |
| 1575 | char buf[MAX_WPA_IE_LEN]; |
| 1576 | memcpy(buf, bss->rsn_ie, bss->rsn_ie_len); |
| 1577 | iwe.cmd = IWEVGENIE; |
| 1578 | iwe.u.data.length = bss->rsn_ie_len; |
| 1579 | start = iwe_stream_add_point(start, stop, &iwe, buf); |
| 1580 | } |
| 1581 | |
Dan Williams | 00af015 | 2007-08-02 13:14:56 -0400 | [diff] [blame] | 1582 | if (bss->mesh) { |
| 1583 | char custom[MAX_CUSTOM_LEN]; |
| 1584 | char *p = custom; |
| 1585 | |
| 1586 | iwe.cmd = IWEVCUSTOM; |
| 1587 | p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), |
| 1588 | "mesh-type: olpc"); |
| 1589 | iwe.u.data.length = p - custom; |
| 1590 | if (iwe.u.data.length) |
| 1591 | start = iwe_stream_add_point(start, stop, &iwe, custom); |
| 1592 | } |
| 1593 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1594 | out: |
| 1595 | lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1596 | return start; |
| 1597 | } |
| 1598 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1599 | /** |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1600 | * @brief Handle Retrieve scan table ioctl |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1601 | * |
| 1602 | * @param dev A pointer to net_device structure |
| 1603 | * @param info A pointer to iw_request_info structure |
| 1604 | * @param dwrq A pointer to iw_point structure |
| 1605 | * @param extra A pointer to extra data buf |
| 1606 | * |
| 1607 | * @return 0 --success, otherwise fail |
| 1608 | */ |
| 1609 | int libertas_get_scan(struct net_device *dev, struct iw_request_info *info, |
| 1610 | struct iw_point *dwrq, char *extra) |
| 1611 | { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1612 | #define SCAN_ITEM_SIZE 128 |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1613 | wlan_private *priv = dev->priv; |
| 1614 | wlan_adapter *adapter = priv->adapter; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1615 | int err = 0; |
| 1616 | char *ev = extra; |
| 1617 | char *stop = ev + dwrq->length; |
| 1618 | struct bss_descriptor * iter_bss; |
| 1619 | struct bss_descriptor * safe; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1620 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1621 | lbs_deb_enter(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1622 | |
Dan Williams | 80e78ef | 2007-05-25 22:18:47 -0400 | [diff] [blame] | 1623 | /* Update RSSI if current BSS is a locally created ad-hoc BSS */ |
Dan Williams | aeea0ab | 2007-05-25 22:30:48 -0400 | [diff] [blame] | 1624 | if ((adapter->mode == IW_MODE_ADHOC) && adapter->adhoccreate) { |
Dan Williams | 0aef64d | 2007-08-02 11:31:18 -0400 | [diff] [blame] | 1625 | libertas_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, |
| 1626 | CMD_OPTION_WAITFORRSP, 0, NULL); |
Dan Williams | 80e78ef | 2007-05-25 22:18:47 -0400 | [diff] [blame] | 1627 | } |
| 1628 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1629 | mutex_lock(&adapter->lock); |
| 1630 | list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) { |
| 1631 | char * next_ev; |
| 1632 | unsigned long stale_time; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1633 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1634 | if (stop - ev < SCAN_ITEM_SIZE) { |
| 1635 | err = -E2BIG; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1636 | break; |
| 1637 | } |
| 1638 | |
Luis Carlos Cobo | 1e838bf | 2007-08-02 10:51:27 -0400 | [diff] [blame] | 1639 | /* For mesh device, list only mesh networks */ |
| 1640 | if (dev == priv->mesh_dev && !iter_bss->mesh) |
| 1641 | continue; |
| 1642 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1643 | /* Prune old an old scan result */ |
| 1644 | stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; |
| 1645 | if (time_after(jiffies, stale_time)) { |
| 1646 | list_move_tail (&iter_bss->list, |
| 1647 | &adapter->network_free_list); |
| 1648 | clear_bss_descriptor(iter_bss); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1649 | continue; |
| 1650 | } |
| 1651 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1652 | /* Translate to WE format this entry */ |
| 1653 | next_ev = libertas_translate_scan(priv, ev, stop, iter_bss); |
| 1654 | if (next_ev == NULL) |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1655 | continue; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1656 | ev = next_ev; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1657 | } |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1658 | mutex_unlock(&adapter->lock); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1659 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1660 | dwrq->length = (ev - extra); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1661 | dwrq->flags = 0; |
| 1662 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1663 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", err); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1664 | return err; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1665 | } |
| 1666 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1667 | |
| 1668 | |
| 1669 | |
| 1670 | /*********************************************************************/ |
| 1671 | /* */ |
| 1672 | /* Command execution */ |
| 1673 | /* */ |
| 1674 | /*********************************************************************/ |
| 1675 | |
| 1676 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1677 | /** |
| 1678 | * @brief Prepare a scan command to be sent to the firmware |
| 1679 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1680 | * Called from libertas_prepare_and_send_command() in cmd.c |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1681 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1682 | * Sends a fixed lenght data part (specifying the BSS type and BSSID filters) |
| 1683 | * as well as a variable number/length of TLVs to the firmware. |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1684 | * |
| 1685 | * @param priv A pointer to wlan_private structure |
| 1686 | * @param cmd A pointer to cmd_ds_command structure to be sent to |
| 1687 | * firmware with the cmd_DS_801_11_SCAN structure |
| 1688 | * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used |
| 1689 | * to set the fields/TLVs for the command sent to firmware |
| 1690 | * |
| 1691 | * @return 0 or -1 |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1692 | */ |
| 1693 | int libertas_cmd_80211_scan(wlan_private * priv, |
| 1694 | struct cmd_ds_command *cmd, void *pdata_buf) |
| 1695 | { |
| 1696 | struct cmd_ds_802_11_scan *pscan = &cmd->params.scan; |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1697 | struct wlan_scan_cmd_config *pscancfg = pdata_buf; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1698 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1699 | lbs_deb_enter(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1700 | |
| 1701 | /* Set fixed field variables in scan command */ |
| 1702 | pscan->bsstype = pscancfg->bsstype; |
Dan Williams | 492b6da | 2007-08-02 11:16:07 -0400 | [diff] [blame] | 1703 | memcpy(pscan->bssid, pscancfg->bssid, ETH_ALEN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1704 | memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen); |
| 1705 | |
Dan Williams | 0aef64d | 2007-08-02 11:31:18 -0400 | [diff] [blame] | 1706 | cmd->command = cpu_to_le16(CMD_802_11_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1707 | |
| 1708 | /* size is equal to the sizeof(fixed portions) + the TLV len + header */ |
Dan Williams | 492b6da | 2007-08-02 11:16:07 -0400 | [diff] [blame] | 1709 | cmd->size = cpu_to_le16(sizeof(pscan->bsstype) + ETH_ALEN |
| 1710 | + pscancfg->tlvbufferlen + S_DS_GEN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1711 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1712 | lbs_deb_scan("SCAN_CMD: command 0x%04x, size %d, seqnum %d\n", |
David Woodhouse | 981f187 | 2007-05-25 23:36:54 -0400 | [diff] [blame] | 1713 | le16_to_cpu(cmd->command), le16_to_cpu(cmd->size), |
| 1714 | le16_to_cpu(cmd->seqnum)); |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1715 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1716 | lbs_deb_leave(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1717 | return 0; |
| 1718 | } |
| 1719 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1720 | static inline int is_same_network(struct bss_descriptor *src, |
| 1721 | struct bss_descriptor *dst) |
| 1722 | { |
| 1723 | /* A network is only a duplicate if the channel, BSSID, and ESSID |
| 1724 | * all match. We treat all <hidden> with the same BSSID and channel |
| 1725 | * as one network */ |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1726 | return ((src->ssid_len == dst->ssid_len) && |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1727 | (src->channel == dst->channel) && |
| 1728 | !compare_ether_addr(src->bssid, dst->bssid) && |
Dan Williams | d8efea2 | 2007-05-28 23:54:55 -0400 | [diff] [blame] | 1729 | !memcmp(src->ssid, dst->ssid, src->ssid_len)); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1730 | } |
| 1731 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1732 | /** |
| 1733 | * @brief This function handles the command response of scan |
| 1734 | * |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1735 | * Called from handle_cmd_response() in cmdrespc. |
| 1736 | * |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1737 | * The response buffer for the scan command has the following |
| 1738 | * memory layout: |
| 1739 | * |
| 1740 | * .-----------------------------------------------------------. |
| 1741 | * | header (4 * sizeof(u16)): Standard command response hdr | |
| 1742 | * .-----------------------------------------------------------. |
| 1743 | * | bufsize (u16) : sizeof the BSS Description data | |
| 1744 | * .-----------------------------------------------------------. |
| 1745 | * | NumOfSet (u8) : Number of BSS Descs returned | |
| 1746 | * .-----------------------------------------------------------. |
| 1747 | * | BSSDescription data (variable, size given in bufsize) | |
| 1748 | * .-----------------------------------------------------------. |
| 1749 | * | TLV data (variable, size calculated using header->size, | |
| 1750 | * | bufsize and sizeof the fixed fields above) | |
| 1751 | * .-----------------------------------------------------------. |
| 1752 | * |
| 1753 | * @param priv A pointer to wlan_private structure |
| 1754 | * @param resp A pointer to cmd_ds_command |
| 1755 | * |
| 1756 | * @return 0 or -1 |
| 1757 | */ |
| 1758 | int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp) |
| 1759 | { |
| 1760 | wlan_adapter *adapter = priv->adapter; |
| 1761 | struct cmd_ds_802_11_scan_rsp *pscan; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1762 | struct bss_descriptor * iter_bss; |
| 1763 | struct bss_descriptor * safe; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1764 | u8 *pbssinfo; |
| 1765 | u16 scanrespsize; |
| 1766 | int bytesleft; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1767 | int idx; |
| 1768 | int tlvbufsize; |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1769 | int ret; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1770 | |
Holger Schurig | e56188a | 2007-10-09 14:15:19 +0200 | [diff] [blame^] | 1771 | lbs_deb_enter(LBS_DEB_SCAN); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1772 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1773 | /* Prune old entries from scan table */ |
| 1774 | list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) { |
| 1775 | unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; |
| 1776 | if (time_before(jiffies, stale_time)) |
| 1777 | continue; |
| 1778 | list_move_tail (&iter_bss->list, &adapter->network_free_list); |
| 1779 | clear_bss_descriptor(iter_bss); |
| 1780 | } |
| 1781 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1782 | pscan = &resp->params.scanresp; |
| 1783 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1784 | if (pscan->nr_sets > MAX_NETWORK_COUNT) { |
| 1785 | lbs_deb_scan( |
| 1786 | "SCAN_RESP: too many scan results (%d, max %d)!!\n", |
| 1787 | pscan->nr_sets, MAX_NETWORK_COUNT); |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1788 | ret = -1; |
| 1789 | goto done; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1790 | } |
| 1791 | |
Vladimir Davydov | ac630c2 | 2007-09-06 21:45:36 -0400 | [diff] [blame] | 1792 | bytesleft = le16_to_cpu(get_unaligned((u16*)&pscan->bssdescriptsize)); |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1793 | lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1794 | |
Vladimir Davydov | ac630c2 | 2007-09-06 21:45:36 -0400 | [diff] [blame] | 1795 | scanrespsize = le16_to_cpu(get_unaligned((u16*)&resp->size)); |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1796 | lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n", |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1797 | pscan->nr_sets); |
| 1798 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1799 | pbssinfo = pscan->bssdesc_and_tlvbuffer; |
| 1800 | |
| 1801 | /* The size of the TLV buffer is equal to the entire command response |
| 1802 | * size (scanrespsize) minus the fixed fields (sizeof()'s), the |
| 1803 | * BSS Descriptions (bssdescriptsize as bytesLef) and the command |
| 1804 | * response header (S_DS_GEN) |
| 1805 | */ |
| 1806 | tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize) |
| 1807 | + sizeof(pscan->nr_sets) |
| 1808 | + S_DS_GEN); |
| 1809 | |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1810 | /* |
| 1811 | * Process each scan response returned (pscan->nr_sets). Save |
| 1812 | * the information in the newbssentry and then insert into the |
| 1813 | * driver scan table either as an update to an existing entry |
| 1814 | * or as an addition at the end of the table |
| 1815 | */ |
| 1816 | for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) { |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1817 | struct bss_descriptor new; |
| 1818 | struct bss_descriptor * found = NULL; |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1819 | struct bss_descriptor * oldest = NULL; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1820 | DECLARE_MAC_BUF(mac); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1821 | |
| 1822 | /* Process the data fields and IEs returned for this BSS */ |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1823 | memset(&new, 0, sizeof (struct bss_descriptor)); |
| 1824 | if (libertas_process_bss(&new, &pbssinfo, &bytesleft) != 0) { |
| 1825 | /* error parsing the scan response, skipped */ |
| 1826 | lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n"); |
| 1827 | continue; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1828 | } |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1829 | |
| 1830 | /* Try to find this bss in the scan table */ |
| 1831 | list_for_each_entry (iter_bss, &adapter->network_list, list) { |
| 1832 | if (is_same_network(iter_bss, &new)) { |
| 1833 | found = iter_bss; |
| 1834 | break; |
| 1835 | } |
| 1836 | |
| 1837 | if ((oldest == NULL) || |
| 1838 | (iter_bss->last_scanned < oldest->last_scanned)) |
| 1839 | oldest = iter_bss; |
| 1840 | } |
| 1841 | |
| 1842 | if (found) { |
| 1843 | /* found, clear it */ |
| 1844 | clear_bss_descriptor(found); |
| 1845 | } else if (!list_empty(&adapter->network_free_list)) { |
| 1846 | /* Pull one from the free list */ |
| 1847 | found = list_entry(adapter->network_free_list.next, |
| 1848 | struct bss_descriptor, list); |
| 1849 | list_move_tail(&found->list, &adapter->network_list); |
| 1850 | } else if (oldest) { |
| 1851 | /* If there are no more slots, expire the oldest */ |
| 1852 | found = oldest; |
| 1853 | clear_bss_descriptor(found); |
| 1854 | list_move_tail(&found->list, &adapter->network_list); |
| 1855 | } else { |
| 1856 | continue; |
| 1857 | } |
| 1858 | |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1859 | lbs_deb_scan("SCAN_RESP: BSSID = %s\n", |
| 1860 | print_mac(mac, new.bssid)); |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1861 | |
Dan Williams | fcdb53d | 2007-05-25 16:15:56 -0400 | [diff] [blame] | 1862 | /* Copy the locally created newbssentry to the scan table */ |
| 1863 | memcpy(found, &new, offsetof(struct bss_descriptor, list)); |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1864 | } |
| 1865 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1866 | ret = 0; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1867 | |
Holger Schurig | 9012b28 | 2007-05-25 11:27:16 -0400 | [diff] [blame] | 1868 | done: |
| 1869 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
| 1870 | return ret; |
Marcelo Tosatti | 876c9d3 | 2007-02-10 12:25:27 -0200 | [diff] [blame] | 1871 | } |