Commit | Line | Data |
---|---|---|
876c9d3a MT |
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> | |
fcdb53db | 11 | #include <linux/etherdevice.h> |
876c9d3a MT |
12 | |
13 | #include <net/ieee80211.h> | |
14 | #include <net/iw_handler.h> | |
15 | ||
ac630c2b VD |
16 | #include <asm/unaligned.h> |
17 | ||
876c9d3a MT |
18 | #include "host.h" |
19 | #include "decl.h" | |
20 | #include "dev.h" | |
21 | #include "scan.h" | |
8c512765 | 22 | #include "join.h" |
fa62f99c | 23 | #include "cmd.h" |
876c9d3a MT |
24 | |
25 | //! Approximate amount of data needed to pass a scan result back to iwlist | |
26 | #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \ | |
27 | + IW_ESSID_MAX_SIZE \ | |
28 | + IW_EV_UINT_LEN \ | |
29 | + IW_EV_FREQ_LEN \ | |
30 | + IW_EV_QUAL_LEN \ | |
31 | + IW_ESSID_MAX_SIZE \ | |
32 | + IW_EV_PARAM_LEN \ | |
33 | + 40) /* 40 for WPAIE */ | |
34 | ||
35 | //! Memory needed to store a max sized channel List TLV for a firmware scan | |
36 | #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \ | |
37 | + (MRVDRV_MAX_CHANNELS_PER_SCAN \ | |
38 | * sizeof(struct chanscanparamset))) | |
39 | ||
40 | //! Memory needed to store a max number/size SSID TLV for a firmware scan | |
41 | #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset)) | |
42 | ||
fa62f99c DW |
43 | //! Maximum memory needed for a cmd_ds_802_11_scan with all TLVs at max |
44 | #define MAX_SCAN_CFG_ALLOC (sizeof(struct cmd_ds_802_11_scan) \ | |
45 | + CHAN_TLV_MAX_SIZE + SSID_TLV_MAX_SIZE) | |
876c9d3a MT |
46 | |
47 | //! The maximum number of channels the firmware can scan per command | |
48 | #define MRVDRV_MAX_CHANNELS_PER_SCAN 14 | |
49 | ||
50 | /** | |
51 | * @brief Number of channels to scan per firmware scan command issuance. | |
52 | * | |
53 | * Number restricted to prevent hitting the limit on the amount of scan data | |
54 | * returned in a single firmware scan command. | |
55 | */ | |
56 | #define MRVDRV_CHANNELS_PER_SCAN_CMD 4 | |
57 | ||
58 | //! Scan time specified in the channel TLV for each channel for passive scans | |
59 | #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100 | |
60 | ||
61 | //! Scan time specified in the channel TLV for each channel for active scans | |
62 | #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100 | |
63 | ||
fa62f99c DW |
64 | static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy, |
65 | struct cmd_header *resp); | |
e56188ac HS |
66 | |
67 | /*********************************************************************/ | |
68 | /* */ | |
69 | /* Misc helper functions */ | |
70 | /* */ | |
71 | /*********************************************************************/ | |
72 | ||
23ff5036 HS |
73 | /** |
74 | * @brief Unsets the MSB on basic rates | |
75 | * | |
76 | * Scan through an array and unset the MSB for basic data rates. | |
77 | * | |
78 | * @param rates buffer of data rates | |
79 | * @param len size of buffer | |
80 | */ | |
81 | static void lbs_unset_basic_rate_flags(u8 *rates, size_t len) | |
82 | { | |
83 | int i; | |
84 | ||
85 | for (i = 0; i < len; i++) | |
86 | rates[i] &= 0x7f; | |
87 | } | |
88 | ||
89 | ||
f137e054 | 90 | static inline void clear_bss_descriptor(struct bss_descriptor *bss) |
fcdb53db DW |
91 | { |
92 | /* Don't blow away ->list, just BSS data */ | |
93 | memset(bss, 0, offsetof(struct bss_descriptor, list)); | |
94 | } | |
95 | ||
ffd074fc HS |
96 | /** |
97 | * @brief Compare two SSIDs | |
98 | * | |
99 | * @param ssid1 A pointer to ssid to compare | |
100 | * @param ssid2 A pointer to ssid to compare | |
101 | * | |
102 | * @return 0: ssid is same, otherwise is different | |
103 | */ | |
f137e054 DW |
104 | int lbs_ssid_cmp(uint8_t *ssid1, uint8_t ssid1_len, uint8_t *ssid2, |
105 | uint8_t ssid2_len) | |
ffd074fc HS |
106 | { |
107 | if (ssid1_len != ssid2_len) | |
108 | return -1; | |
109 | ||
110 | return memcmp(ssid1, ssid2, ssid1_len); | |
111 | } | |
112 | ||
10078321 | 113 | static inline int match_bss_no_security(struct lbs_802_11_security *secinfo, |
f137e054 | 114 | struct bss_descriptor *match_bss) |
fcdb53db | 115 | { |
f137e054 | 116 | if (!secinfo->wep_enabled && !secinfo->WPAenabled |
fcdb53db | 117 | && !secinfo->WPA2enabled |
ab617971 DW |
118 | && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC |
119 | && match_bss->rsn_ie[0] != MFIE_TYPE_RSN | |
f137e054 | 120 | && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) |
fcdb53db | 121 | return 1; |
f137e054 DW |
122 | else |
123 | return 0; | |
fcdb53db DW |
124 | } |
125 | ||
10078321 | 126 | static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo, |
f137e054 | 127 | struct bss_descriptor *match_bss) |
fcdb53db | 128 | { |
f137e054 DW |
129 | if (secinfo->wep_enabled && !secinfo->WPAenabled |
130 | && !secinfo->WPA2enabled | |
131 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) | |
fcdb53db | 132 | return 1; |
f137e054 DW |
133 | else |
134 | return 0; | |
fcdb53db DW |
135 | } |
136 | ||
10078321 | 137 | static inline int match_bss_wpa(struct lbs_802_11_security *secinfo, |
f137e054 | 138 | struct bss_descriptor *match_bss) |
fcdb53db | 139 | { |
f137e054 DW |
140 | if (!secinfo->wep_enabled && secinfo->WPAenabled |
141 | && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC) | |
142 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G | |
143 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */ | |
144 | ) | |
fcdb53db | 145 | return 1; |
f137e054 DW |
146 | else |
147 | return 0; | |
fcdb53db DW |
148 | } |
149 | ||
10078321 | 150 | static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo, |
f137e054 | 151 | struct bss_descriptor *match_bss) |
fcdb53db | 152 | { |
f137e054 DW |
153 | if (!secinfo->wep_enabled && secinfo->WPA2enabled |
154 | && (match_bss->rsn_ie[0] == MFIE_TYPE_RSN) | |
155 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G | |
156 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */ | |
157 | ) | |
fcdb53db | 158 | return 1; |
f137e054 DW |
159 | else |
160 | return 0; | |
fcdb53db DW |
161 | } |
162 | ||
10078321 | 163 | static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo, |
f137e054 | 164 | struct bss_descriptor *match_bss) |
fcdb53db | 165 | { |
f137e054 DW |
166 | if (!secinfo->wep_enabled && !secinfo->WPAenabled |
167 | && !secinfo->WPA2enabled | |
168 | && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC) | |
169 | && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN) | |
170 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) | |
fcdb53db | 171 | return 1; |
f137e054 DW |
172 | else |
173 | return 0; | |
fcdb53db | 174 | } |
876c9d3a | 175 | |
ffd074fc HS |
176 | static inline int is_same_network(struct bss_descriptor *src, |
177 | struct bss_descriptor *dst) | |
178 | { | |
179 | /* A network is only a duplicate if the channel, BSSID, and ESSID | |
180 | * all match. We treat all <hidden> with the same BSSID and channel | |
181 | * as one network */ | |
182 | return ((src->ssid_len == dst->ssid_len) && | |
183 | (src->channel == dst->channel) && | |
184 | !compare_ether_addr(src->bssid, dst->bssid) && | |
185 | !memcmp(src->ssid, dst->ssid, src->ssid_len)); | |
186 | } | |
187 | ||
876c9d3a MT |
188 | /** |
189 | * @brief Check if a scanned network compatible with the driver settings | |
190 | * | |
191 | * WEP WPA WPA2 ad-hoc encrypt Network | |
192 | * enabled enabled enabled AES mode privacy WPA WPA2 Compatible | |
193 | * 0 0 0 0 NONE 0 0 0 yes No security | |
194 | * 1 0 0 0 NONE 1 0 0 yes Static WEP | |
195 | * 0 1 0 0 x 1x 1 x yes WPA | |
196 | * 0 0 1 0 x 1x x 1 yes WPA2 | |
197 | * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES | |
198 | * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP | |
199 | * | |
200 | * | |
aa21c004 | 201 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
202 | * @param index Index in scantable to check against current driver settings |
203 | * @param mode Network mode: Infrastructure or IBSS | |
204 | * | |
205 | * @return Index in scantable, or error code if negative | |
206 | */ | |
aa21c004 | 207 | static int is_network_compatible(struct lbs_private *priv, |
f137e054 | 208 | struct bss_descriptor *bss, uint8_t mode) |
876c9d3a | 209 | { |
fcdb53db DW |
210 | int matched = 0; |
211 | ||
e56188ac | 212 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 213 | |
fcdb53db DW |
214 | if (bss->mode != mode) |
215 | goto done; | |
876c9d3a | 216 | |
aa21c004 | 217 | if ((matched = match_bss_no_security(&priv->secinfo, bss))) { |
fcdb53db | 218 | goto done; |
aa21c004 | 219 | } else if ((matched = match_bss_static_wep(&priv->secinfo, bss))) { |
fcdb53db | 220 | goto done; |
aa21c004 | 221 | } else if ((matched = match_bss_wpa(&priv->secinfo, bss))) { |
f137e054 DW |
222 | lbs_deb_scan("is_network_compatible() WPA: wpa_ie 0x%x " |
223 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " | |
224 | "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], | |
225 | priv->secinfo.wep_enabled ? "e" : "d", | |
226 | priv->secinfo.WPAenabled ? "e" : "d", | |
227 | priv->secinfo.WPA2enabled ? "e" : "d", | |
228 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); | |
fcdb53db | 229 | goto done; |
aa21c004 | 230 | } else if ((matched = match_bss_wpa2(&priv->secinfo, bss))) { |
f137e054 DW |
231 | lbs_deb_scan("is_network_compatible() WPA2: wpa_ie 0x%x " |
232 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " | |
233 | "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], | |
234 | priv->secinfo.wep_enabled ? "e" : "d", | |
235 | priv->secinfo.WPAenabled ? "e" : "d", | |
236 | priv->secinfo.WPA2enabled ? "e" : "d", | |
237 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); | |
fcdb53db | 238 | goto done; |
aa21c004 | 239 | } else if ((matched = match_bss_dynamic_wep(&priv->secinfo, bss))) { |
f137e054 DW |
240 | lbs_deb_scan("is_network_compatible() dynamic WEP: " |
241 | "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n", | |
242 | bss->wpa_ie[0], bss->rsn_ie[0], | |
243 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); | |
9012b28a | 244 | goto done; |
876c9d3a MT |
245 | } |
246 | ||
fcdb53db | 247 | /* bss security settings don't match those configured on card */ |
f137e054 DW |
248 | lbs_deb_scan("is_network_compatible() FAILED: wpa_ie 0x%x " |
249 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n", | |
250 | bss->wpa_ie[0], bss->rsn_ie[0], | |
251 | priv->secinfo.wep_enabled ? "e" : "d", | |
252 | priv->secinfo.WPAenabled ? "e" : "d", | |
253 | priv->secinfo.WPA2enabled ? "e" : "d", | |
254 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); | |
9012b28a HS |
255 | |
256 | done: | |
e56188ac | 257 | lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched); |
fcdb53db | 258 | return matched; |
876c9d3a MT |
259 | } |
260 | ||
e56188ac HS |
261 | |
262 | ||
263 | ||
264 | /*********************************************************************/ | |
265 | /* */ | |
266 | /* Main scanning support */ | |
267 | /* */ | |
268 | /*********************************************************************/ | |
269 | ||
ffd074fc HS |
270 | void lbs_scan_worker(struct work_struct *work) |
271 | { | |
272 | struct lbs_private *priv = | |
273 | container_of(work, struct lbs_private, scan_work.work); | |
274 | ||
275 | lbs_deb_enter(LBS_DEB_SCAN); | |
276 | lbs_scan_networks(priv, NULL, 0); | |
277 | lbs_deb_leave(LBS_DEB_SCAN); | |
278 | } | |
279 | ||
e56188ac | 280 | |
876c9d3a MT |
281 | /** |
282 | * @brief Create a channel list for the driver to scan based on region info | |
283 | * | |
10078321 | 284 | * Only used from lbs_scan_setup_scan_config() |
e56188ac | 285 | * |
876c9d3a MT |
286 | * Use the driver region/band information to construct a comprehensive list |
287 | * of channels to scan. This routine is used for any scan that is not | |
288 | * provided a specific channel list to scan. | |
289 | * | |
69f9032d | 290 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
291 | * @param scanchanlist Output parameter: resulting channel list to scan |
292 | * @param filteredscan Flag indicating whether or not a BSSID or SSID filter | |
293 | * is being sent in the command to firmware. Used to | |
294 | * increase the number of channels sent in a scan | |
295 | * command and to disable the firmware channel scan | |
296 | * filter. | |
297 | * | |
298 | * @return void | |
299 | */ | |
ffd074fc | 300 | static int lbs_scan_create_channel_list(struct lbs_private *priv, |
f137e054 DW |
301 | struct chanscanparamset *scanchanlist, |
302 | uint8_t filteredscan) | |
876c9d3a | 303 | { |
876c9d3a MT |
304 | struct region_channel *scanregion; |
305 | struct chan_freq_power *cfp; | |
306 | int rgnidx; | |
307 | int chanidx; | |
308 | int nextchan; | |
f137e054 | 309 | uint8_t scantype; |
876c9d3a MT |
310 | |
311 | chanidx = 0; | |
312 | ||
313 | /* Set the default scan type to the user specified type, will later | |
314 | * be changed to passive on a per channel basis if restricted by | |
315 | * regulatory requirements (11d or 11h) | |
316 | */ | |
4f2fdaaf | 317 | scantype = CMD_SCAN_TYPE_ACTIVE; |
876c9d3a | 318 | |
aa21c004 | 319 | for (rgnidx = 0; rgnidx < ARRAY_SIZE(priv->region_channel); rgnidx++) { |
f137e054 DW |
320 | if (priv->enable11d && (priv->connect_status != LBS_CONNECTED) |
321 | && (priv->mesh_connect_status != LBS_CONNECTED)) { | |
876c9d3a | 322 | /* Scan all the supported chan for the first scan */ |
aa21c004 | 323 | if (!priv->universal_channel[rgnidx].valid) |
876c9d3a | 324 | continue; |
aa21c004 | 325 | scanregion = &priv->universal_channel[rgnidx]; |
876c9d3a MT |
326 | |
327 | /* clear the parsed_region_chan for the first scan */ | |
aa21c004 DW |
328 | memset(&priv->parsed_region_chan, 0x00, |
329 | sizeof(priv->parsed_region_chan)); | |
876c9d3a | 330 | } else { |
aa21c004 | 331 | if (!priv->region_channel[rgnidx].valid) |
876c9d3a | 332 | continue; |
aa21c004 | 333 | scanregion = &priv->region_channel[rgnidx]; |
876c9d3a MT |
334 | } |
335 | ||
f137e054 DW |
336 | for (nextchan = 0; nextchan < scanregion->nrcfp; nextchan++, chanidx++) { |
337 | struct chanscanparamset *chan = &scanchanlist[chanidx]; | |
876c9d3a MT |
338 | |
339 | cfp = scanregion->CFP + nextchan; | |
340 | ||
f137e054 DW |
341 | if (priv->enable11d) |
342 | scantype = lbs_get_scan_type_11d(cfp->channel, | |
343 | &priv->parsed_region_chan); | |
876c9d3a | 344 | |
f137e054 DW |
345 | if (scanregion->band == BAND_B || scanregion->band == BAND_G) |
346 | chan->radiotype = CMD_SCAN_RADIO_TYPE_BG; | |
876c9d3a | 347 | |
0aef64d7 | 348 | if (scantype == CMD_SCAN_TYPE_PASSIVE) { |
f137e054 DW |
349 | chan->maxscantime = cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME); |
350 | chan->chanscanmode.passivescan = 1; | |
876c9d3a | 351 | } else { |
f137e054 DW |
352 | chan->maxscantime = cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME); |
353 | chan->chanscanmode.passivescan = 0; | |
876c9d3a MT |
354 | } |
355 | ||
f137e054 | 356 | chan->channumber = cfp->channel; |
876c9d3a | 357 | |
f137e054 DW |
358 | if (filteredscan) |
359 | chan->chanscanmode.disablechanfilt = 1; | |
876c9d3a MT |
360 | } |
361 | } | |
ffd074fc | 362 | return chanidx; |
876c9d3a MT |
363 | } |
364 | ||
2afc0c5d | 365 | |
ffd074fc HS |
366 | /* |
367 | * Add SSID TLV of the form: | |
368 | * | |
369 | * TLV-ID SSID 00 00 | |
370 | * length 06 00 | |
371 | * ssid 4d 4e 54 45 53 54 | |
372 | */ | |
f137e054 DW |
373 | static int lbs_scan_add_ssid_tlv(uint8_t *tlv, |
374 | const struct lbs_ioctl_user_scan_cfg *user_cfg) | |
2afc0c5d | 375 | { |
f137e054 DW |
376 | struct mrvlietypes_ssidparamset *ssid_tlv = (void *)tlv; |
377 | ||
ffd074fc HS |
378 | ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID); |
379 | ssid_tlv->header.len = cpu_to_le16(user_cfg->ssid_len); | |
380 | memcpy(ssid_tlv->ssid, user_cfg->ssid, user_cfg->ssid_len); | |
381 | return sizeof(ssid_tlv->header) + user_cfg->ssid_len; | |
2afc0c5d DW |
382 | } |
383 | ||
384 | ||
ffd074fc HS |
385 | /* |
386 | * Add CHANLIST TLV of the form | |
876c9d3a | 387 | * |
ffd074fc HS |
388 | * TLV-ID CHANLIST 01 01 |
389 | * length 5b 00 | |
390 | * channel 1 00 01 00 00 00 64 00 | |
391 | * radio type 00 | |
392 | * channel 01 | |
393 | * scan type 00 | |
394 | * min scan time 00 00 | |
395 | * max scan time 64 00 | |
396 | * channel 2 00 02 00 00 00 64 00 | |
397 | * channel 3 00 03 00 00 00 64 00 | |
398 | * channel 4 00 04 00 00 00 64 00 | |
399 | * channel 5 00 05 00 00 00 64 00 | |
400 | * channel 6 00 06 00 00 00 64 00 | |
401 | * channel 7 00 07 00 00 00 64 00 | |
402 | * channel 8 00 08 00 00 00 64 00 | |
403 | * channel 9 00 09 00 00 00 64 00 | |
404 | * channel 10 00 0a 00 00 00 64 00 | |
405 | * channel 11 00 0b 00 00 00 64 00 | |
406 | * channel 12 00 0c 00 00 00 64 00 | |
407 | * channel 13 00 0d 00 00 00 64 00 | |
876c9d3a | 408 | * |
876c9d3a | 409 | */ |
f137e054 DW |
410 | static int lbs_scan_add_chanlist_tlv(uint8_t *tlv, |
411 | struct chanscanparamset *chan_list, | |
412 | int chan_count) | |
876c9d3a | 413 | { |
f137e054 DW |
414 | size_t size = sizeof(struct chanscanparamset) *chan_count; |
415 | struct mrvlietypes_chanlistparamset *chan_tlv = (void *)tlv; | |
ffd074fc HS |
416 | |
417 | chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); | |
418 | memcpy(chan_tlv->chanscanparam, chan_list, size); | |
419 | chan_tlv->header.len = cpu_to_le16(size); | |
420 | return sizeof(chan_tlv->header) + size; | |
876c9d3a MT |
421 | } |
422 | ||
ffd074fc HS |
423 | |
424 | /* | |
425 | * Add RATES TLV of the form | |
876c9d3a | 426 | * |
ffd074fc HS |
427 | * TLV-ID RATES 01 00 |
428 | * length 0e 00 | |
429 | * rates 82 84 8b 96 0c 12 18 24 30 48 60 6c | |
876c9d3a | 430 | * |
ffd074fc HS |
431 | * The rates are in lbs_bg_rates[], but for the 802.11b |
432 | * rates the high bit isn't set. | |
876c9d3a | 433 | */ |
f137e054 | 434 | static int lbs_scan_add_rates_tlv(uint8_t *tlv) |
876c9d3a | 435 | { |
ffd074fc | 436 | int i; |
f137e054 | 437 | struct mrvlietypes_ratesparamset *rate_tlv = (void *)tlv; |
ffd074fc HS |
438 | |
439 | rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES); | |
440 | tlv += sizeof(rate_tlv->header); | |
441 | for (i = 0; i < MAX_RATES; i++) { | |
442 | *tlv = lbs_bg_rates[i]; | |
443 | if (*tlv == 0) | |
444 | break; | |
445 | /* This code makes sure that the 802.11b rates (1 MBit/s, 2 | |
446 | MBit/s, 5.5 MBit/s and 11 MBit/s get's the high bit set. | |
447 | Note that the values are MBit/s * 2, to mark them as | |
448 | basic rates so that the firmware likes it better */ | |
449 | if (*tlv == 0x02 || *tlv == 0x04 || | |
450 | *tlv == 0x0b || *tlv == 0x16) | |
451 | *tlv |= 0x80; | |
452 | tlv++; | |
2afc0c5d | 453 | } |
ffd074fc HS |
454 | rate_tlv->header.len = cpu_to_le16(i); |
455 | return sizeof(rate_tlv->header) + i; | |
876c9d3a MT |
456 | } |
457 | ||
ffd074fc | 458 | |
e56188ac | 459 | /* |
ffd074fc HS |
460 | * Generate the CMD_802_11_SCAN command with the proper tlv |
461 | * for a bunch of channels. | |
462 | */ | |
fa62f99c DW |
463 | static int lbs_do_scan(struct lbs_private *priv, uint8_t bsstype, |
464 | struct chanscanparamset *chan_list, int chan_count, | |
465 | const struct lbs_ioctl_user_scan_cfg *user_cfg) | |
eb8f7330 | 466 | { |
ffd074fc | 467 | int ret = -ENOMEM; |
fa62f99c DW |
468 | struct cmd_ds_802_11_scan *scan_cmd; |
469 | uint8_t *tlv; /* pointer into our current, growing TLV storage area */ | |
eb8f7330 | 470 | |
fa62f99c DW |
471 | lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, chan_count %d", |
472 | bsstype, chan_list[0].channumber, chan_count); | |
e56188ac | 473 | |
ffd074fc HS |
474 | /* create the fixed part for scan command */ |
475 | scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL); | |
476 | if (scan_cmd == NULL) | |
e56188ac | 477 | goto out; |
fa62f99c | 478 | |
ffd074fc HS |
479 | tlv = scan_cmd->tlvbuffer; |
480 | if (user_cfg) | |
481 | memcpy(scan_cmd->bssid, user_cfg->bssid, ETH_ALEN); | |
482 | scan_cmd->bsstype = bsstype; | |
483 | ||
484 | /* add TLVs */ | |
485 | if (user_cfg && user_cfg->ssid_len) | |
486 | tlv += lbs_scan_add_ssid_tlv(tlv, user_cfg); | |
487 | if (chan_list && chan_count) | |
488 | tlv += lbs_scan_add_chanlist_tlv(tlv, chan_list, chan_count); | |
489 | tlv += lbs_scan_add_rates_tlv(tlv); | |
490 | ||
491 | /* This is the final data we are about to send */ | |
fa62f99c DW |
492 | scan_cmd->hdr.size = cpu_to_le16(tlv - (uint8_t *)scan_cmd); |
493 | lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd, | |
494 | sizeof(*scan_cmd)); | |
ffd074fc | 495 | lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer, |
fa62f99c DW |
496 | tlv - scan_cmd->tlvbuffer); |
497 | ||
498 | ret = __lbs_cmd(priv, CMD_802_11_SCAN, &scan_cmd->hdr, | |
499 | le16_to_cpu(scan_cmd->hdr.size), | |
500 | lbs_ret_80211_scan, 0); | |
ffd074fc | 501 | |
e56188ac | 502 | out: |
ffd074fc HS |
503 | kfree(scan_cmd); |
504 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
505 | return ret; | |
eb8f7330 DW |
506 | } |
507 | ||
508 | ||
876c9d3a MT |
509 | /** |
510 | * @brief Internal function used to start a scan based on an input config | |
511 | * | |
e56188ac HS |
512 | * Also used from debugfs |
513 | * | |
876c9d3a MT |
514 | * Use the input user scan configuration information when provided in |
515 | * order to send the appropriate scan commands to firmware to populate or | |
516 | * update the internal driver scan table | |
517 | * | |
69f9032d | 518 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
519 | * @param puserscanin Pointer to the input configuration for the requested |
520 | * scan. | |
521 | * | |
522 | * @return 0 or < 0 if error | |
523 | */ | |
69f9032d | 524 | int lbs_scan_networks(struct lbs_private *priv, |
f137e054 DW |
525 | const struct lbs_ioctl_user_scan_cfg *user_cfg, |
526 | int full_scan) | |
876c9d3a | 527 | { |
ffd074fc HS |
528 | int ret = -ENOMEM; |
529 | struct chanscanparamset *chan_list; | |
530 | struct chanscanparamset *curr_chans; | |
531 | int chan_count; | |
f137e054 | 532 | uint8_t bsstype = CMD_BSS_TYPE_ANY; |
ffd074fc HS |
533 | int numchannels = MRVDRV_CHANNELS_PER_SCAN_CMD; |
534 | int filteredscan = 0; | |
535 | union iwreq_data wrqu; | |
f8f55108 | 536 | #ifdef CONFIG_LIBERTAS_DEBUG |
ffd074fc | 537 | struct bss_descriptor *iter; |
f8f55108 | 538 | int i = 0; |
0795af57 | 539 | DECLARE_MAC_BUF(mac); |
f8f55108 | 540 | #endif |
876c9d3a | 541 | |
f137e054 | 542 | lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", full_scan); |
2afc0c5d DW |
543 | |
544 | /* Cancel any partial outstanding partial scans if this scan | |
545 | * is a full scan. | |
546 | */ | |
547 | if (full_scan && delayed_work_pending(&priv->scan_work)) | |
548 | cancel_delayed_work(&priv->scan_work); | |
876c9d3a | 549 | |
ffd074fc HS |
550 | /* Determine same scan parameters */ |
551 | if (user_cfg) { | |
552 | if (user_cfg->bsstype) | |
553 | bsstype = user_cfg->bsstype; | |
f137e054 | 554 | if (!is_zero_ether_addr(user_cfg->bssid)) { |
ffd074fc HS |
555 | numchannels = MRVDRV_MAX_CHANNELS_PER_SCAN; |
556 | filteredscan = 1; | |
557 | } | |
876c9d3a | 558 | } |
f137e054 DW |
559 | lbs_deb_scan("numchannels %d, bsstype %d, filteredscan %d\n", |
560 | numchannels, bsstype, filteredscan); | |
876c9d3a | 561 | |
ffd074fc HS |
562 | /* Create list of channels to scan */ |
563 | chan_list = kzalloc(sizeof(struct chanscanparamset) * | |
f137e054 | 564 | LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL); |
ffd074fc HS |
565 | if (!chan_list) { |
566 | lbs_pr_alert("SCAN: chan_list empty\n"); | |
876c9d3a MT |
567 | goto out; |
568 | } | |
569 | ||
ffd074fc | 570 | /* We want to scan all channels */ |
f137e054 | 571 | chan_count = lbs_scan_create_channel_list(priv, chan_list, filteredscan); |
876c9d3a | 572 | |
ffd074fc HS |
573 | netif_stop_queue(priv->dev); |
574 | netif_carrier_off(priv->dev); | |
575 | if (priv->mesh_dev) { | |
a27b9f96 DW |
576 | netif_stop_queue(priv->mesh_dev); |
577 | netif_carrier_off(priv->mesh_dev); | |
876c9d3a MT |
578 | } |
579 | ||
ffd074fc | 580 | /* Prepare to continue an interrupted scan */ |
8816edce HS |
581 | lbs_deb_scan("chan_count %d, scan_channel %d\n", |
582 | chan_count, priv->scan_channel); | |
ffd074fc HS |
583 | curr_chans = chan_list; |
584 | /* advance channel list by already-scanned-channels */ | |
8816edce HS |
585 | if (priv->scan_channel > 0) { |
586 | curr_chans += priv->scan_channel; | |
587 | chan_count -= priv->scan_channel; | |
ffd074fc HS |
588 | } |
589 | ||
590 | /* Send scan command(s) | |
591 | * numchannels contains the number of channels we should maximally scan | |
592 | * chan_count is the total number of channels to scan | |
593 | */ | |
594 | ||
595 | while (chan_count) { | |
596 | int to_scan = min(numchannels, chan_count); | |
597 | lbs_deb_scan("scanning %d of %d channels\n", | |
f137e054 | 598 | to_scan, chan_count); |
ffd074fc | 599 | ret = lbs_do_scan(priv, bsstype, curr_chans, |
f137e054 | 600 | to_scan, user_cfg); |
ffd074fc HS |
601 | if (ret) { |
602 | lbs_pr_err("SCAN_CMD failed\n"); | |
603 | goto out2; | |
604 | } | |
605 | curr_chans += to_scan; | |
606 | chan_count -= to_scan; | |
607 | ||
608 | /* somehow schedule the next part of the scan */ | |
f137e054 | 609 | if (chan_count && !full_scan && |
aa21c004 | 610 | !priv->surpriseremoved) { |
ffd074fc | 611 | /* -1 marks just that we're currently scanning */ |
8816edce HS |
612 | if (priv->scan_channel < 0) |
613 | priv->scan_channel = to_scan; | |
ffd074fc | 614 | else |
8816edce | 615 | priv->scan_channel += to_scan; |
ffd074fc HS |
616 | cancel_delayed_work(&priv->scan_work); |
617 | queue_delayed_work(priv->work_thread, &priv->scan_work, | |
f137e054 | 618 | msecs_to_jiffies(300)); |
ffd074fc HS |
619 | /* skip over GIWSCAN event */ |
620 | goto out; | |
621 | } | |
622 | ||
623 | } | |
624 | memset(&wrqu, 0, sizeof(union iwreq_data)); | |
625 | wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL); | |
876c9d3a | 626 | |
f8f55108 DW |
627 | #ifdef CONFIG_LIBERTAS_DEBUG |
628 | /* Dump the scan table */ | |
aa21c004 | 629 | mutex_lock(&priv->lock); |
ffd074fc | 630 | lbs_deb_scan("scan table:\n"); |
aa21c004 | 631 | list_for_each_entry(iter, &priv->network_list, list) |
ffd074fc | 632 | lbs_deb_scan("%02d: BSSID %s, RSSI %d, SSID '%s'\n", |
f137e054 DW |
633 | i++, print_mac(mac, iter->bssid), (int)iter->rssi, |
634 | escape_essid(iter->ssid, iter->ssid_len)); | |
aa21c004 | 635 | mutex_unlock(&priv->lock); |
f8f55108 | 636 | #endif |
876c9d3a | 637 | |
ffd074fc | 638 | out2: |
8816edce | 639 | priv->scan_channel = 0; |
ffd074fc HS |
640 | |
641 | out: | |
aa21c004 | 642 | if (priv->connect_status == LBS_CONNECTED) { |
634b8f49 | 643 | netif_carrier_on(priv->dev); |
a27b9f96 DW |
644 | if (!priv->tx_pending_len) |
645 | netif_wake_queue(priv->dev); | |
01d77d8d | 646 | } |
aa21c004 | 647 | if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) { |
01d77d8d | 648 | netif_carrier_on(priv->mesh_dev); |
a27b9f96 DW |
649 | if (!priv->tx_pending_len) |
650 | netif_wake_queue(priv->mesh_dev); | |
876c9d3a | 651 | } |
ffd074fc | 652 | kfree(chan_list); |
876c9d3a | 653 | |
9012b28a | 654 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
876c9d3a MT |
655 | return ret; |
656 | } | |
657 | ||
ffd074fc HS |
658 | |
659 | ||
660 | ||
661 | /*********************************************************************/ | |
662 | /* */ | |
663 | /* Result interpretation */ | |
664 | /* */ | |
665 | /*********************************************************************/ | |
666 | ||
876c9d3a MT |
667 | /** |
668 | * @brief Interpret a BSS scan response returned from the firmware | |
669 | * | |
670 | * Parse the various fixed fields and IEs passed back for a a BSS probe | |
ffd074fc HS |
671 | * response or beacon from the scan command. Record information as needed |
672 | * in the scan table struct bss_descriptor for that entry. | |
876c9d3a | 673 | * |
fcdb53db | 674 | * @param bss Output parameter: Pointer to the BSS Entry |
876c9d3a MT |
675 | * |
676 | * @return 0 or -1 | |
677 | */ | |
10078321 | 678 | static int lbs_process_bss(struct bss_descriptor *bss, |
f137e054 | 679 | uint8_t **pbeaconinfo, int *bytesleft) |
876c9d3a | 680 | { |
876c9d3a MT |
681 | struct ieeetypes_fhparamset *pFH; |
682 | struct ieeetypes_dsparamset *pDS; | |
683 | struct ieeetypes_cfparamset *pCF; | |
684 | struct ieeetypes_ibssparamset *pibss; | |
0795af57 | 685 | DECLARE_MAC_BUF(mac); |
876c9d3a | 686 | struct ieeetypes_countryinfoset *pcountryinfo; |
f137e054 DW |
687 | uint8_t *pos, *end, *p; |
688 | uint8_t n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0; | |
689 | uint16_t beaconsize = 0; | |
8c512765 | 690 | int ret; |
876c9d3a | 691 | |
e56188ac | 692 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 693 | |
876c9d3a MT |
694 | if (*bytesleft >= sizeof(beaconsize)) { |
695 | /* Extract & convert beacon size from the command buffer */ | |
e7240aca | 696 | beaconsize = le16_to_cpu(get_unaligned((__le16 *)*pbeaconinfo)); |
876c9d3a MT |
697 | *bytesleft -= sizeof(beaconsize); |
698 | *pbeaconinfo += sizeof(beaconsize); | |
699 | } | |
700 | ||
701 | if (beaconsize == 0 || beaconsize > *bytesleft) { | |
876c9d3a MT |
702 | *pbeaconinfo += *bytesleft; |
703 | *bytesleft = 0; | |
e56188ac HS |
704 | ret = -1; |
705 | goto done; | |
876c9d3a MT |
706 | } |
707 | ||
708 | /* Initialize the current working beacon pointer for this BSS iteration */ | |
ab617971 DW |
709 | pos = *pbeaconinfo; |
710 | end = pos + beaconsize; | |
876c9d3a MT |
711 | |
712 | /* Advance the return beacon pointer past the current beacon */ | |
713 | *pbeaconinfo += beaconsize; | |
714 | *bytesleft -= beaconsize; | |
715 | ||
ab617971 | 716 | memcpy(bss->bssid, pos, ETH_ALEN); |
ffd074fc | 717 | lbs_deb_scan("process_bss: BSSID %s\n", print_mac(mac, bss->bssid)); |
ab617971 | 718 | pos += ETH_ALEN; |
876c9d3a | 719 | |
ab617971 | 720 | if ((end - pos) < 12) { |
fcdb53db | 721 | lbs_deb_scan("process_bss: Not enough bytes left\n"); |
e56188ac HS |
722 | ret = -1; |
723 | goto done; | |
876c9d3a MT |
724 | } |
725 | ||
726 | /* | |
727 | * next 4 fields are RSSI, time stamp, beacon interval, | |
728 | * and capability information | |
729 | */ | |
730 | ||
731 | /* RSSI is 1 byte long */ | |
ab617971 | 732 | bss->rssi = *pos; |
ffd074fc | 733 | lbs_deb_scan("process_bss: RSSI %d\n", *pos); |
ab617971 | 734 | pos++; |
876c9d3a MT |
735 | |
736 | /* time stamp is 8 bytes long */ | |
ab617971 | 737 | pos += 8; |
876c9d3a MT |
738 | |
739 | /* beacon interval is 2 bytes long */ | |
ab617971 DW |
740 | bss->beaconperiod = le16_to_cpup((void *) pos); |
741 | pos += 2; | |
876c9d3a MT |
742 | |
743 | /* capability information is 2 bytes long */ | |
ab617971 | 744 | bss->capability = le16_to_cpup((void *) pos); |
ffd074fc | 745 | lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability); |
ab617971 | 746 | pos += 2; |
876c9d3a | 747 | |
0c9ca690 | 748 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) |
ffd074fc | 749 | lbs_deb_scan("process_bss: WEP enabled\n"); |
0c9ca690 DW |
750 | if (bss->capability & WLAN_CAPABILITY_IBSS) |
751 | bss->mode = IW_MODE_ADHOC; | |
752 | else | |
753 | bss->mode = IW_MODE_INFRA; | |
754 | ||
876c9d3a | 755 | /* rest of the current buffer are IE's */ |
ffd074fc | 756 | lbs_deb_scan("process_bss: IE len %zd\n", end - pos); |
ece56191 | 757 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos); |
876c9d3a | 758 | |
876c9d3a | 759 | /* process variable IE */ |
ab617971 | 760 | while (pos <= end - 2) { |
f137e054 | 761 | struct ieee80211_info_element * elem = (void *)pos; |
876c9d3a | 762 | |
ab617971 | 763 | if (pos + elem->len > end) { |
fcdb53db | 764 | lbs_deb_scan("process_bss: error in processing IE, " |
f137e054 | 765 | "bytes left < IE length\n"); |
ab617971 | 766 | break; |
876c9d3a MT |
767 | } |
768 | ||
ab617971 DW |
769 | switch (elem->id) { |
770 | case MFIE_TYPE_SSID: | |
771 | bss->ssid_len = elem->len; | |
772 | memcpy(bss->ssid, elem->data, elem->len); | |
ffd074fc | 773 | lbs_deb_scan("got SSID IE: '%s', len %u\n", |
d8efea25 DW |
774 | escape_essid(bss->ssid, bss->ssid_len), |
775 | bss->ssid_len); | |
876c9d3a MT |
776 | break; |
777 | ||
ab617971 | 778 | case MFIE_TYPE_RATES: |
f137e054 | 779 | n_basic_rates = min_t(uint8_t, MAX_RATES, elem->len); |
8c512765 DW |
780 | memcpy(bss->rates, elem->data, n_basic_rates); |
781 | got_basic_rates = 1; | |
ffd074fc | 782 | lbs_deb_scan("got RATES IE\n"); |
876c9d3a MT |
783 | break; |
784 | ||
ab617971 DW |
785 | case MFIE_TYPE_FH_SET: |
786 | pFH = (struct ieeetypes_fhparamset *) pos; | |
fcdb53db | 787 | memmove(&bss->phyparamset.fhparamset, pFH, |
876c9d3a | 788 | sizeof(struct ieeetypes_fhparamset)); |
ffd074fc | 789 | lbs_deb_scan("got FH IE\n"); |
876c9d3a MT |
790 | break; |
791 | ||
ab617971 DW |
792 | case MFIE_TYPE_DS_SET: |
793 | pDS = (struct ieeetypes_dsparamset *) pos; | |
fcdb53db DW |
794 | bss->channel = pDS->currentchan; |
795 | memcpy(&bss->phyparamset.dsparamset, pDS, | |
876c9d3a | 796 | sizeof(struct ieeetypes_dsparamset)); |
ffd074fc | 797 | lbs_deb_scan("got DS IE, channel %d\n", bss->channel); |
876c9d3a MT |
798 | break; |
799 | ||
ab617971 DW |
800 | case MFIE_TYPE_CF_SET: |
801 | pCF = (struct ieeetypes_cfparamset *) pos; | |
fcdb53db | 802 | memcpy(&bss->ssparamset.cfparamset, pCF, |
876c9d3a | 803 | sizeof(struct ieeetypes_cfparamset)); |
ffd074fc | 804 | lbs_deb_scan("got CF IE\n"); |
876c9d3a MT |
805 | break; |
806 | ||
ab617971 DW |
807 | case MFIE_TYPE_IBSS_SET: |
808 | pibss = (struct ieeetypes_ibssparamset *) pos; | |
e7240aca | 809 | bss->atimwindow = le16_to_cpu(pibss->atimwindow); |
fcdb53db | 810 | memmove(&bss->ssparamset.ibssparamset, pibss, |
876c9d3a | 811 | sizeof(struct ieeetypes_ibssparamset)); |
ffd074fc | 812 | lbs_deb_scan("got IBSS IE\n"); |
876c9d3a MT |
813 | break; |
814 | ||
ab617971 DW |
815 | case MFIE_TYPE_COUNTRY: |
816 | pcountryinfo = (struct ieeetypes_countryinfoset *) pos; | |
ffd074fc | 817 | lbs_deb_scan("got COUNTRY IE\n"); |
fcdb53db | 818 | if (pcountryinfo->len < sizeof(pcountryinfo->countrycode) |
876c9d3a | 819 | || pcountryinfo->len > 254) { |
f137e054 DW |
820 | lbs_deb_scan("process_bss: 11D- Err CountryInfo len %d, min %zd, max 254\n", |
821 | pcountryinfo->len, sizeof(pcountryinfo->countrycode)); | |
9012b28a HS |
822 | ret = -1; |
823 | goto done; | |
876c9d3a MT |
824 | } |
825 | ||
f137e054 | 826 | memcpy(&bss->countryinfo, pcountryinfo, pcountryinfo->len + 2); |
ece56191 | 827 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: 11d countryinfo", |
f137e054 DW |
828 | (uint8_t *) pcountryinfo, |
829 | (int) (pcountryinfo->len + 2)); | |
876c9d3a MT |
830 | break; |
831 | ||
ab617971 DW |
832 | case MFIE_TYPE_RATES_EX: |
833 | /* only process extended supported rate if data rate is | |
834 | * already found. Data rate IE should come before | |
876c9d3a MT |
835 | * extended supported rate IE |
836 | */ | |
ffd074fc HS |
837 | lbs_deb_scan("got RATESEX IE\n"); |
838 | if (!got_basic_rates) { | |
839 | lbs_deb_scan("... but ignoring it\n"); | |
ab617971 | 840 | break; |
ffd074fc | 841 | } |
876c9d3a | 842 | |
8c512765 DW |
843 | n_ex_rates = elem->len; |
844 | if (n_basic_rates + n_ex_rates > MAX_RATES) | |
845 | n_ex_rates = MAX_RATES - n_basic_rates; | |
876c9d3a | 846 | |
8c512765 DW |
847 | p = bss->rates + n_basic_rates; |
848 | memcpy(p, elem->data, n_ex_rates); | |
876c9d3a | 849 | break; |
ab617971 DW |
850 | |
851 | case MFIE_TYPE_GENERIC: | |
852 | if (elem->len >= 4 && | |
f137e054 DW |
853 | elem->data[0] == 0x00 && elem->data[1] == 0x50 && |
854 | elem->data[2] == 0xf2 && elem->data[3] == 0x01) { | |
855 | bss->wpa_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN); | |
ab617971 | 856 | memcpy(bss->wpa_ie, elem, bss->wpa_ie_len); |
ffd074fc | 857 | lbs_deb_scan("got WPA IE\n"); |
f137e054 | 858 | lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie, elem->len); |
1e838bf3 | 859 | } else if (elem->len >= MARVELL_MESH_IE_LENGTH && |
f137e054 DW |
860 | elem->data[0] == 0x00 && elem->data[1] == 0x50 && |
861 | elem->data[2] == 0x43 && elem->data[3] == 0x04) { | |
ffd074fc | 862 | lbs_deb_scan("got mesh IE\n"); |
1e838bf3 | 863 | bss->mesh = 1; |
ffd074fc | 864 | } else { |
f137e054 | 865 | lbs_deb_scan("got generic IE: %02x:%02x:%02x:%02x, len %d\n", |
ffd074fc HS |
866 | elem->data[0], elem->data[1], |
867 | elem->data[2], elem->data[3], | |
868 | elem->len); | |
ab617971 | 869 | } |
876c9d3a | 870 | break; |
ab617971 DW |
871 | |
872 | case MFIE_TYPE_RSN: | |
ffd074fc | 873 | lbs_deb_scan("got RSN IE\n"); |
ab617971 DW |
874 | bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN); |
875 | memcpy(bss->rsn_ie, elem, bss->rsn_ie_len); | |
ffd074fc | 876 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", |
f137e054 | 877 | bss->rsn_ie, elem->len); |
876c9d3a MT |
878 | break; |
879 | ||
ab617971 | 880 | default: |
ffd074fc | 881 | lbs_deb_scan("got IE 0x%04x, len %d\n", |
f137e054 | 882 | elem->id, elem->len); |
876c9d3a MT |
883 | break; |
884 | } | |
885 | ||
ab617971 DW |
886 | pos += elem->len + 2; |
887 | } | |
fcdb53db DW |
888 | |
889 | /* Timestamp */ | |
890 | bss->last_scanned = jiffies; | |
10078321 | 891 | lbs_unset_basic_rate_flags(bss->rates, sizeof(bss->rates)); |
fcdb53db | 892 | |
9012b28a | 893 | ret = 0; |
876c9d3a | 894 | |
9012b28a HS |
895 | done: |
896 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
897 | return ret; | |
876c9d3a MT |
898 | } |
899 | ||
876c9d3a MT |
900 | /** |
901 | * @brief This function finds a specific compatible BSSID in the scan list | |
902 | * | |
e56188ac HS |
903 | * Used in association code |
904 | * | |
aa21c004 | 905 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
906 | * @param bssid BSSID to find in the scan list |
907 | * @param mode Network mode: Infrastructure or IBSS | |
908 | * | |
909 | * @return index in BSSID list, or error return code (< 0) | |
910 | */ | |
aa21c004 | 911 | struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv, |
f137e054 | 912 | uint8_t *bssid, uint8_t mode) |
876c9d3a | 913 | { |
f137e054 DW |
914 | struct bss_descriptor *iter_bss; |
915 | struct bss_descriptor *found_bss = NULL; | |
876c9d3a | 916 | |
e56188ac HS |
917 | lbs_deb_enter(LBS_DEB_SCAN); |
918 | ||
876c9d3a | 919 | if (!bssid) |
e56188ac | 920 | goto out; |
876c9d3a | 921 | |
f137e054 | 922 | lbs_deb_hex(LBS_DEB_SCAN, "looking for", bssid, ETH_ALEN); |
876c9d3a | 923 | |
fcdb53db DW |
924 | /* Look through the scan table for a compatible match. The loop will |
925 | * continue past a matched bssid that is not compatible in case there | |
926 | * is an AP with multiple SSIDs assigned to the same BSSID | |
876c9d3a | 927 | */ |
aa21c004 DW |
928 | mutex_lock(&priv->lock); |
929 | list_for_each_entry (iter_bss, &priv->network_list, list) { | |
3cf20931 | 930 | if (compare_ether_addr(iter_bss->bssid, bssid)) |
fcdb53db DW |
931 | continue; /* bssid doesn't match */ |
932 | switch (mode) { | |
933 | case IW_MODE_INFRA: | |
934 | case IW_MODE_ADHOC: | |
aa21c004 | 935 | if (!is_network_compatible(priv, iter_bss, mode)) |
876c9d3a | 936 | break; |
fcdb53db DW |
937 | found_bss = iter_bss; |
938 | break; | |
939 | default: | |
940 | found_bss = iter_bss; | |
941 | break; | |
876c9d3a MT |
942 | } |
943 | } | |
aa21c004 | 944 | mutex_unlock(&priv->lock); |
876c9d3a | 945 | |
e56188ac HS |
946 | out: |
947 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); | |
fcdb53db | 948 | return found_bss; |
876c9d3a MT |
949 | } |
950 | ||
951 | /** | |
952 | * @brief This function finds ssid in ssid list. | |
953 | * | |
e56188ac HS |
954 | * Used in association code |
955 | * | |
aa21c004 | 956 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
957 | * @param ssid SSID to find in the list |
958 | * @param bssid BSSID to qualify the SSID selection (if provided) | |
959 | * @param mode Network mode: Infrastructure or IBSS | |
960 | * | |
961 | * @return index in BSSID list | |
962 | */ | |
aa21c004 | 963 | struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv, |
f137e054 DW |
964 | uint8_t *ssid, uint8_t ssid_len, |
965 | uint8_t *bssid, uint8_t mode, | |
966 | int channel) | |
876c9d3a | 967 | { |
f137e054 | 968 | uint8_t bestrssi = 0; |
fcdb53db DW |
969 | struct bss_descriptor * iter_bss = NULL; |
970 | struct bss_descriptor * found_bss = NULL; | |
971 | struct bss_descriptor * tmp_oldest = NULL; | |
876c9d3a | 972 | |
e56188ac HS |
973 | lbs_deb_enter(LBS_DEB_SCAN); |
974 | ||
aa21c004 | 975 | mutex_lock(&priv->lock); |
fcdb53db | 976 | |
aa21c004 | 977 | list_for_each_entry (iter_bss, &priv->network_list, list) { |
fcdb53db DW |
978 | if ( !tmp_oldest |
979 | || (iter_bss->last_scanned < tmp_oldest->last_scanned)) | |
980 | tmp_oldest = iter_bss; | |
981 | ||
10078321 | 982 | if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len, |
f137e054 | 983 | ssid, ssid_len) != 0) |
fcdb53db | 984 | continue; /* ssid doesn't match */ |
3cf20931 | 985 | if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0) |
fcdb53db | 986 | continue; /* bssid doesn't match */ |
aeea0ab4 DW |
987 | if ((channel > 0) && (iter_bss->channel != channel)) |
988 | continue; /* channel doesn't match */ | |
fcdb53db DW |
989 | |
990 | switch (mode) { | |
991 | case IW_MODE_INFRA: | |
992 | case IW_MODE_ADHOC: | |
aa21c004 | 993 | if (!is_network_compatible(priv, iter_bss, mode)) |
876c9d3a | 994 | break; |
fcdb53db DW |
995 | |
996 | if (bssid) { | |
997 | /* Found requested BSSID */ | |
998 | found_bss = iter_bss; | |
999 | goto out; | |
1000 | } | |
1001 | ||
1002 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { | |
1003 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1004 | found_bss = iter_bss; | |
1005 | } | |
1006 | break; | |
1007 | case IW_MODE_AUTO: | |
1008 | default: | |
1009 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { | |
1010 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1011 | found_bss = iter_bss; | |
876c9d3a | 1012 | } |
fcdb53db | 1013 | break; |
876c9d3a MT |
1014 | } |
1015 | } | |
1016 | ||
fcdb53db | 1017 | out: |
aa21c004 | 1018 | mutex_unlock(&priv->lock); |
e56188ac | 1019 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); |
fcdb53db | 1020 | return found_bss; |
876c9d3a MT |
1021 | } |
1022 | ||
1023 | /** | |
1024 | * @brief This function finds the best SSID in the Scan List | |
1025 | * | |
1026 | * Search the scan table for the best SSID that also matches the current | |
1027 | * adapter network preference (infrastructure or adhoc) | |
1028 | * | |
aa21c004 | 1029 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
1030 | * |
1031 | * @return index in BSSID list | |
1032 | */ | |
f137e054 DW |
1033 | static struct bss_descriptor *lbs_find_best_ssid_in_list(struct lbs_private *priv, |
1034 | uint8_t mode) | |
876c9d3a | 1035 | { |
f137e054 DW |
1036 | uint8_t bestrssi = 0; |
1037 | struct bss_descriptor *iter_bss; | |
1038 | struct bss_descriptor *best_bss = NULL; | |
876c9d3a | 1039 | |
e56188ac HS |
1040 | lbs_deb_enter(LBS_DEB_SCAN); |
1041 | ||
aa21c004 | 1042 | mutex_lock(&priv->lock); |
876c9d3a | 1043 | |
aa21c004 | 1044 | list_for_each_entry (iter_bss, &priv->network_list, list) { |
876c9d3a | 1045 | switch (mode) { |
0dc5a290 DW |
1046 | case IW_MODE_INFRA: |
1047 | case IW_MODE_ADHOC: | |
aa21c004 | 1048 | if (!is_network_compatible(priv, iter_bss, mode)) |
fcdb53db DW |
1049 | break; |
1050 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) | |
1051 | break; | |
1052 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1053 | best_bss = iter_bss; | |
876c9d3a | 1054 | break; |
0dc5a290 | 1055 | case IW_MODE_AUTO: |
876c9d3a | 1056 | default: |
fcdb53db DW |
1057 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) |
1058 | break; | |
1059 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1060 | best_bss = iter_bss; | |
876c9d3a MT |
1061 | break; |
1062 | } | |
1063 | } | |
1064 | ||
aa21c004 | 1065 | mutex_unlock(&priv->lock); |
e56188ac | 1066 | lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss); |
fcdb53db | 1067 | return best_bss; |
876c9d3a MT |
1068 | } |
1069 | ||
1070 | /** | |
1071 | * @brief Find the AP with specific ssid in the scan list | |
1072 | * | |
e56188ac HS |
1073 | * Used from association worker. |
1074 | * | |
69f9032d | 1075 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
1076 | * @param pSSID A pointer to AP's ssid |
1077 | * | |
1078 | * @return 0--success, otherwise--fail | |
1079 | */ | |
f137e054 DW |
1080 | int lbs_find_best_network_ssid(struct lbs_private *priv, uint8_t *out_ssid, |
1081 | uint8_t *out_ssid_len, uint8_t preferred_mode, | |
1082 | uint8_t *out_mode) | |
876c9d3a | 1083 | { |
fcdb53db | 1084 | int ret = -1; |
f137e054 | 1085 | struct bss_descriptor *found; |
876c9d3a | 1086 | |
e56188ac | 1087 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 1088 | |
10078321 | 1089 | lbs_scan_networks(priv, NULL, 1); |
aa21c004 | 1090 | if (priv->surpriseremoved) |
e56188ac | 1091 | goto out; |
876c9d3a | 1092 | |
aa21c004 | 1093 | found = lbs_find_best_ssid_in_list(priv, preferred_mode); |
d8efea25 DW |
1094 | if (found && (found->ssid_len > 0)) { |
1095 | memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE); | |
1096 | *out_ssid_len = found->ssid_len; | |
fcdb53db DW |
1097 | *out_mode = found->mode; |
1098 | ret = 0; | |
876c9d3a MT |
1099 | } |
1100 | ||
e56188ac | 1101 | out: |
9012b28a | 1102 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
876c9d3a MT |
1103 | return ret; |
1104 | } | |
1105 | ||
e56188ac | 1106 | |
876c9d3a MT |
1107 | /** |
1108 | * @brief Send a scan command for all available channels filtered on a spec | |
1109 | * | |
e56188ac HS |
1110 | * Used in association code and from debugfs |
1111 | * | |
69f9032d | 1112 | * @param priv A pointer to struct lbs_private structure |
e56188ac HS |
1113 | * @param ssid A pointer to the SSID to scan for |
1114 | * @param ssid_len Length of the SSID | |
1115 | * @param clear_ssid Should existing scan results with this SSID | |
1116 | * be cleared? | |
876c9d3a MT |
1117 | * |
1118 | * @return 0-success, otherwise fail | |
1119 | */ | |
f137e054 DW |
1120 | int lbs_send_specific_ssid_scan(struct lbs_private *priv, uint8_t *ssid, |
1121 | uint8_t ssid_len, uint8_t clear_ssid) | |
876c9d3a | 1122 | { |
10078321 | 1123 | struct lbs_ioctl_user_scan_cfg scancfg; |
eb8f7330 | 1124 | int ret = 0; |
876c9d3a | 1125 | |
e56188ac | 1126 | lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s', clear %d", |
f137e054 | 1127 | escape_essid(ssid, ssid_len), clear_ssid); |
876c9d3a | 1128 | |
d8efea25 | 1129 | if (!ssid_len) |
eb8f7330 | 1130 | goto out; |
876c9d3a MT |
1131 | |
1132 | memset(&scancfg, 0x00, sizeof(scancfg)); | |
d8efea25 DW |
1133 | memcpy(scancfg.ssid, ssid, ssid_len); |
1134 | scancfg.ssid_len = ssid_len; | |
eb8f7330 | 1135 | scancfg.clear_ssid = clear_ssid; |
876c9d3a | 1136 | |
10078321 | 1137 | lbs_scan_networks(priv, &scancfg, 1); |
aa21c004 | 1138 | if (priv->surpriseremoved) { |
e56188ac HS |
1139 | ret = -1; |
1140 | goto out; | |
1141 | } | |
876c9d3a | 1142 | |
eb8f7330 | 1143 | out: |
e56188ac | 1144 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
eb8f7330 | 1145 | return ret; |
876c9d3a MT |
1146 | } |
1147 | ||
e56188ac HS |
1148 | |
1149 | ||
1150 | ||
1151 | /*********************************************************************/ | |
1152 | /* */ | |
1153 | /* Support for Wireless Extensions */ | |
1154 | /* */ | |
1155 | /*********************************************************************/ | |
1156 | ||
ffd074fc | 1157 | |
00af0157 DW |
1158 | #define MAX_CUSTOM_LEN 64 |
1159 | ||
69f9032d | 1160 | static inline char *lbs_translate_scan(struct lbs_private *priv, |
f137e054 DW |
1161 | char *start, char *stop, |
1162 | struct bss_descriptor *bss) | |
876c9d3a | 1163 | { |
876c9d3a | 1164 | struct chan_freq_power *cfp; |
876c9d3a MT |
1165 | char *current_val; /* For rates */ |
1166 | struct iw_event iwe; /* Temporary buffer */ | |
876c9d3a | 1167 | int j; |
f137e054 DW |
1168 | #define PERFECT_RSSI ((uint8_t)50) |
1169 | #define WORST_RSSI ((uint8_t)0) | |
1170 | #define RSSI_DIFF ((uint8_t)(PERFECT_RSSI - WORST_RSSI)) | |
1171 | uint8_t rssi; | |
876c9d3a | 1172 | |
e56188ac HS |
1173 | lbs_deb_enter(LBS_DEB_SCAN); |
1174 | ||
aa21c004 | 1175 | cfp = lbs_find_cfp_by_band_and_channel(priv, 0, bss->channel); |
fcdb53db DW |
1176 | if (!cfp) { |
1177 | lbs_deb_scan("Invalid channel number %d\n", bss->channel); | |
e56188ac HS |
1178 | start = NULL; |
1179 | goto out; | |
2be92196 | 1180 | } |
876c9d3a | 1181 | |
ffd074fc | 1182 | /* First entry *MUST* be the BSSID */ |
fcdb53db DW |
1183 | iwe.cmd = SIOCGIWAP; |
1184 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
1185 | memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN); | |
1186 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN); | |
1187 | ||
1188 | /* SSID */ | |
1189 | iwe.cmd = SIOCGIWESSID; | |
1190 | iwe.u.data.flags = 1; | |
f137e054 | 1191 | iwe.u.data.length = min((uint32_t) bss->ssid_len, (uint32_t) IW_ESSID_MAX_SIZE); |
d8efea25 | 1192 | start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); |
fcdb53db DW |
1193 | |
1194 | /* Mode */ | |
1195 | iwe.cmd = SIOCGIWMODE; | |
1196 | iwe.u.mode = bss->mode; | |
1197 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN); | |
1198 | ||
1199 | /* Frequency */ | |
1200 | iwe.cmd = SIOCGIWFREQ; | |
1201 | iwe.u.freq.m = (long)cfp->freq * 100000; | |
1202 | iwe.u.freq.e = 1; | |
1203 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN); | |
1204 | ||
1205 | /* Add quality statistics */ | |
1206 | iwe.cmd = IWEVQUAL; | |
1207 | iwe.u.qual.updated = IW_QUAL_ALL_UPDATED; | |
1208 | iwe.u.qual.level = SCAN_RSSI(bss->rssi); | |
1209 | ||
1210 | rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE; | |
1211 | iwe.u.qual.qual = | |
f137e054 DW |
1212 | (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) * |
1213 | (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) / | |
1214 | (RSSI_DIFF * RSSI_DIFF); | |
fcdb53db DW |
1215 | if (iwe.u.qual.qual > 100) |
1216 | iwe.u.qual.qual = 100; | |
1217 | ||
aa21c004 | 1218 | if (priv->NF[TYPE_BEACON][TYPE_NOAVG] == 0) { |
fcdb53db DW |
1219 | iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE; |
1220 | } else { | |
f137e054 | 1221 | iwe.u.qual.noise = CAL_NF(priv->NF[TYPE_BEACON][TYPE_NOAVG]); |
fcdb53db | 1222 | } |
80e78ef7 DW |
1223 | |
1224 | /* Locally created ad-hoc BSSs won't have beacons if this is the | |
1225 | * only station in the adhoc network; so get signal strength | |
1226 | * from receive statistics. | |
1227 | */ | |
f137e054 | 1228 | if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate |
aa21c004 | 1229 | && !lbs_ssid_cmp(priv->curbssparams.ssid, |
f137e054 DW |
1230 | priv->curbssparams.ssid_len, |
1231 | bss->ssid, bss->ssid_len)) { | |
80e78ef7 | 1232 | int snr, nf; |
aa21c004 DW |
1233 | snr = priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; |
1234 | nf = priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; | |
80e78ef7 | 1235 | iwe.u.qual.level = CAL_RSSI(snr, nf); |
fcdb53db DW |
1236 | } |
1237 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN); | |
876c9d3a | 1238 | |
fcdb53db DW |
1239 | /* Add encryption capability */ |
1240 | iwe.cmd = SIOCGIWENCODE; | |
0c9ca690 | 1241 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) { |
fcdb53db DW |
1242 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; |
1243 | } else { | |
1244 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
1245 | } | |
1246 | iwe.u.data.length = 0; | |
d8efea25 | 1247 | start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); |
876c9d3a | 1248 | |
fcdb53db | 1249 | current_val = start + IW_EV_LCP_LEN; |
876c9d3a | 1250 | |
fcdb53db DW |
1251 | iwe.cmd = SIOCGIWRATE; |
1252 | iwe.u.bitrate.fixed = 0; | |
1253 | iwe.u.bitrate.disabled = 0; | |
1254 | iwe.u.bitrate.value = 0; | |
876c9d3a | 1255 | |
8c512765 DW |
1256 | for (j = 0; bss->rates[j] && (j < sizeof(bss->rates)); j++) { |
1257 | /* Bit rate given in 500 kb/s units */ | |
1258 | iwe.u.bitrate.value = bss->rates[j] * 500000; | |
fcdb53db DW |
1259 | current_val = iwe_stream_add_value(start, current_val, |
1260 | stop, &iwe, IW_EV_PARAM_LEN); | |
1261 | } | |
f137e054 | 1262 | if ((bss->mode == IW_MODE_ADHOC) && priv->adhoccreate |
aa21c004 | 1263 | && !lbs_ssid_cmp(priv->curbssparams.ssid, |
f137e054 DW |
1264 | priv->curbssparams.ssid_len, |
1265 | bss->ssid, bss->ssid_len)) { | |
fcdb53db DW |
1266 | iwe.u.bitrate.value = 22 * 500000; |
1267 | current_val = iwe_stream_add_value(start, current_val, | |
f137e054 | 1268 | stop, &iwe, IW_EV_PARAM_LEN); |
fcdb53db DW |
1269 | } |
1270 | /* Check if we added any event */ | |
1271 | if((current_val - start) > IW_EV_LCP_LEN) | |
1272 | start = current_val; | |
1273 | ||
1274 | memset(&iwe, 0, sizeof(iwe)); | |
1275 | if (bss->wpa_ie_len) { | |
1276 | char buf[MAX_WPA_IE_LEN]; | |
1277 | memcpy(buf, bss->wpa_ie, bss->wpa_ie_len); | |
1278 | iwe.cmd = IWEVGENIE; | |
1279 | iwe.u.data.length = bss->wpa_ie_len; | |
1280 | start = iwe_stream_add_point(start, stop, &iwe, buf); | |
1281 | } | |
876c9d3a | 1282 | |
fcdb53db DW |
1283 | memset(&iwe, 0, sizeof(iwe)); |
1284 | if (bss->rsn_ie_len) { | |
1285 | char buf[MAX_WPA_IE_LEN]; | |
1286 | memcpy(buf, bss->rsn_ie, bss->rsn_ie_len); | |
1287 | iwe.cmd = IWEVGENIE; | |
1288 | iwe.u.data.length = bss->rsn_ie_len; | |
1289 | start = iwe_stream_add_point(start, stop, &iwe, buf); | |
1290 | } | |
876c9d3a | 1291 | |
00af0157 DW |
1292 | if (bss->mesh) { |
1293 | char custom[MAX_CUSTOM_LEN]; | |
1294 | char *p = custom; | |
1295 | ||
1296 | iwe.cmd = IWEVCUSTOM; | |
f137e054 | 1297 | p += snprintf(p, MAX_CUSTOM_LEN, "mesh-type: olpc"); |
00af0157 DW |
1298 | iwe.u.data.length = p - custom; |
1299 | if (iwe.u.data.length) | |
1300 | start = iwe_stream_add_point(start, stop, &iwe, custom); | |
1301 | } | |
1302 | ||
e56188ac HS |
1303 | out: |
1304 | lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start); | |
fcdb53db DW |
1305 | return start; |
1306 | } | |
876c9d3a | 1307 | |
ffd074fc HS |
1308 | |
1309 | /** | |
1310 | * @brief Handle Scan Network ioctl | |
1311 | * | |
1312 | * @param dev A pointer to net_device structure | |
1313 | * @param info A pointer to iw_request_info structure | |
1314 | * @param vwrq A pointer to iw_param structure | |
1315 | * @param extra A pointer to extra data buf | |
1316 | * | |
1317 | * @return 0 --success, otherwise fail | |
1318 | */ | |
1319 | int lbs_set_scan(struct net_device *dev, struct iw_request_info *info, | |
f137e054 | 1320 | struct iw_param *wrqu, char *extra) |
ffd074fc HS |
1321 | { |
1322 | struct lbs_private *priv = dev->priv; | |
ffd074fc HS |
1323 | |
1324 | lbs_deb_enter(LBS_DEB_SCAN); | |
1325 | ||
1326 | if (!netif_running(dev)) | |
1327 | return -ENETDOWN; | |
1328 | ||
1329 | /* mac80211 does this: | |
1330 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1331 | if (sdata->type != IEEE80211_IF_TYPE_xxx) | |
1332 | return -EOPNOTSUPP; | |
1333 | ||
1334 | if (wrqu->data.length == sizeof(struct iw_scan_req) && | |
1335 | wrqu->data.flags & IW_SCAN_THIS_ESSID) { | |
1336 | req = (struct iw_scan_req *)extra; | |
1337 | ssid = req->essid; | |
1338 | ssid_len = req->essid_len; | |
1339 | } | |
1340 | */ | |
1341 | ||
1342 | if (!delayed_work_pending(&priv->scan_work)) | |
1343 | queue_delayed_work(priv->work_thread, &priv->scan_work, | |
f137e054 | 1344 | msecs_to_jiffies(50)); |
ffd074fc | 1345 | /* set marker that currently a scan is taking place */ |
8816edce | 1346 | priv->scan_channel = -1; |
ffd074fc | 1347 | |
aa21c004 | 1348 | if (priv->surpriseremoved) |
ffd074fc HS |
1349 | return -EIO; |
1350 | ||
1351 | lbs_deb_leave(LBS_DEB_SCAN); | |
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | ||
fcdb53db | 1356 | /** |
e56188ac | 1357 | * @brief Handle Retrieve scan table ioctl |
fcdb53db DW |
1358 | * |
1359 | * @param dev A pointer to net_device structure | |
1360 | * @param info A pointer to iw_request_info structure | |
1361 | * @param dwrq A pointer to iw_point structure | |
1362 | * @param extra A pointer to extra data buf | |
1363 | * | |
1364 | * @return 0 --success, otherwise fail | |
1365 | */ | |
10078321 | 1366 | int lbs_get_scan(struct net_device *dev, struct iw_request_info *info, |
f137e054 | 1367 | struct iw_point *dwrq, char *extra) |
fcdb53db DW |
1368 | { |
1369 | #define SCAN_ITEM_SIZE 128 | |
69f9032d | 1370 | struct lbs_private *priv = dev->priv; |
fcdb53db DW |
1371 | int err = 0; |
1372 | char *ev = extra; | |
1373 | char *stop = ev + dwrq->length; | |
f137e054 DW |
1374 | struct bss_descriptor *iter_bss; |
1375 | struct bss_descriptor *safe; | |
876c9d3a | 1376 | |
e56188ac | 1377 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 1378 | |
ffd074fc | 1379 | /* iwlist should wait until the current scan is finished */ |
8816edce | 1380 | if (priv->scan_channel) |
ffd074fc HS |
1381 | return -EAGAIN; |
1382 | ||
80e78ef7 | 1383 | /* Update RSSI if current BSS is a locally created ad-hoc BSS */ |
f137e054 | 1384 | if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate) |
10078321 | 1385 | lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, |
f137e054 | 1386 | CMD_OPTION_WAITFORRSP, 0, NULL); |
80e78ef7 | 1387 | |
aa21c004 DW |
1388 | mutex_lock(&priv->lock); |
1389 | list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) { | |
f137e054 | 1390 | char *next_ev; |
fcdb53db | 1391 | unsigned long stale_time; |
876c9d3a | 1392 | |
fcdb53db DW |
1393 | if (stop - ev < SCAN_ITEM_SIZE) { |
1394 | err = -E2BIG; | |
1395 | break; | |
876c9d3a | 1396 | } |
876c9d3a | 1397 | |
1e838bf3 LCC |
1398 | /* For mesh device, list only mesh networks */ |
1399 | if (dev == priv->mesh_dev && !iter_bss->mesh) | |
1400 | continue; | |
1401 | ||
fcdb53db DW |
1402 | /* Prune old an old scan result */ |
1403 | stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; | |
1404 | if (time_after(jiffies, stale_time)) { | |
f137e054 | 1405 | list_move_tail(&iter_bss->list, &priv->network_free_list); |
fcdb53db DW |
1406 | clear_bss_descriptor(iter_bss); |
1407 | continue; | |
876c9d3a MT |
1408 | } |
1409 | ||
fcdb53db | 1410 | /* Translate to WE format this entry */ |
10078321 | 1411 | next_ev = lbs_translate_scan(priv, ev, stop, iter_bss); |
fcdb53db DW |
1412 | if (next_ev == NULL) |
1413 | continue; | |
1414 | ev = next_ev; | |
876c9d3a | 1415 | } |
aa21c004 | 1416 | mutex_unlock(&priv->lock); |
876c9d3a | 1417 | |
fcdb53db | 1418 | dwrq->length = (ev - extra); |
876c9d3a MT |
1419 | dwrq->flags = 0; |
1420 | ||
e56188ac | 1421 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", err); |
fcdb53db | 1422 | return err; |
876c9d3a MT |
1423 | } |
1424 | ||
e56188ac HS |
1425 | |
1426 | ||
1427 | ||
1428 | /*********************************************************************/ | |
1429 | /* */ | |
1430 | /* Command execution */ | |
1431 | /* */ | |
1432 | /*********************************************************************/ | |
1433 | ||
1434 | ||
876c9d3a MT |
1435 | /** |
1436 | * @brief This function handles the command response of scan | |
1437 | * | |
e56188ac HS |
1438 | * Called from handle_cmd_response() in cmdrespc. |
1439 | * | |
876c9d3a MT |
1440 | * The response buffer for the scan command has the following |
1441 | * memory layout: | |
1442 | * | |
1443 | * .-----------------------------------------------------------. | |
1444 | * | header (4 * sizeof(u16)): Standard command response hdr | | |
1445 | * .-----------------------------------------------------------. | |
1446 | * | bufsize (u16) : sizeof the BSS Description data | | |
1447 | * .-----------------------------------------------------------. | |
1448 | * | NumOfSet (u8) : Number of BSS Descs returned | | |
1449 | * .-----------------------------------------------------------. | |
1450 | * | BSSDescription data (variable, size given in bufsize) | | |
1451 | * .-----------------------------------------------------------. | |
1452 | * | TLV data (variable, size calculated using header->size, | | |
1453 | * | bufsize and sizeof the fixed fields above) | | |
1454 | * .-----------------------------------------------------------. | |
1455 | * | |
69f9032d | 1456 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
1457 | * @param resp A pointer to cmd_ds_command |
1458 | * | |
1459 | * @return 0 or -1 | |
1460 | */ | |
fa62f99c DW |
1461 | static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy, |
1462 | struct cmd_header *resp) | |
876c9d3a | 1463 | { |
fa62f99c | 1464 | struct cmd_ds_802_11_scan_rsp *scanresp = (void *)resp; |
f137e054 DW |
1465 | struct bss_descriptor *iter_bss; |
1466 | struct bss_descriptor *safe; | |
fa62f99c DW |
1467 | uint8_t *bssinfo; |
1468 | uint16_t scanrespsize; | |
876c9d3a | 1469 | int bytesleft; |
876c9d3a MT |
1470 | int idx; |
1471 | int tlvbufsize; | |
9012b28a | 1472 | int ret; |
876c9d3a | 1473 | |
e56188ac | 1474 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 1475 | |
fcdb53db | 1476 | /* Prune old entries from scan table */ |
aa21c004 | 1477 | list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) { |
fcdb53db DW |
1478 | unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; |
1479 | if (time_before(jiffies, stale_time)) | |
1480 | continue; | |
aa21c004 | 1481 | list_move_tail (&iter_bss->list, &priv->network_free_list); |
fcdb53db DW |
1482 | clear_bss_descriptor(iter_bss); |
1483 | } | |
1484 | ||
fa62f99c DW |
1485 | if (scanresp->nr_sets > MAX_NETWORK_COUNT) { |
1486 | lbs_deb_scan("SCAN_RESP: too many scan results (%d, max %d)\n", | |
1487 | scanresp->nr_sets, MAX_NETWORK_COUNT); | |
9012b28a HS |
1488 | ret = -1; |
1489 | goto done; | |
876c9d3a MT |
1490 | } |
1491 | ||
fa62f99c | 1492 | bytesleft = le16_to_cpu(scanresp->bssdescriptsize); |
9012b28a | 1493 | lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft); |
876c9d3a | 1494 | |
e7240aca | 1495 | scanrespsize = le16_to_cpu(resp->size); |
fa62f99c | 1496 | lbs_deb_scan("SCAN_RESP: scan results %d\n", scanresp->nr_sets); |
876c9d3a | 1497 | |
fa62f99c | 1498 | bssinfo = scanresp->bssdesc_and_tlvbuffer; |
876c9d3a MT |
1499 | |
1500 | /* The size of the TLV buffer is equal to the entire command response | |
1501 | * size (scanrespsize) minus the fixed fields (sizeof()'s), the | |
1502 | * BSS Descriptions (bssdescriptsize as bytesLef) and the command | |
1503 | * response header (S_DS_GEN) | |
1504 | */ | |
fa62f99c DW |
1505 | tlvbufsize = scanrespsize - (bytesleft + sizeof(scanresp->bssdescriptsize) |
1506 | + sizeof(scanresp->nr_sets) | |
876c9d3a MT |
1507 | + S_DS_GEN); |
1508 | ||
876c9d3a | 1509 | /* |
fa62f99c | 1510 | * Process each scan response returned (scanresp->nr_sets). Save |
876c9d3a MT |
1511 | * the information in the newbssentry and then insert into the |
1512 | * driver scan table either as an update to an existing entry | |
1513 | * or as an addition at the end of the table | |
1514 | */ | |
fa62f99c | 1515 | for (idx = 0; idx < scanresp->nr_sets && bytesleft; idx++) { |
fcdb53db | 1516 | struct bss_descriptor new; |
fa62f99c DW |
1517 | struct bss_descriptor *found = NULL; |
1518 | struct bss_descriptor *oldest = NULL; | |
0795af57 | 1519 | DECLARE_MAC_BUF(mac); |
876c9d3a MT |
1520 | |
1521 | /* Process the data fields and IEs returned for this BSS */ | |
fcdb53db | 1522 | memset(&new, 0, sizeof (struct bss_descriptor)); |
fa62f99c | 1523 | if (lbs_process_bss(&new, &bssinfo, &bytesleft) != 0) { |
fcdb53db DW |
1524 | /* error parsing the scan response, skipped */ |
1525 | lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n"); | |
1526 | continue; | |
1527 | } | |
876c9d3a | 1528 | |
fcdb53db | 1529 | /* Try to find this bss in the scan table */ |
aa21c004 | 1530 | list_for_each_entry (iter_bss, &priv->network_list, list) { |
fcdb53db DW |
1531 | if (is_same_network(iter_bss, &new)) { |
1532 | found = iter_bss; | |
1533 | break; | |
876c9d3a MT |
1534 | } |
1535 | ||
fcdb53db DW |
1536 | if ((oldest == NULL) || |
1537 | (iter_bss->last_scanned < oldest->last_scanned)) | |
1538 | oldest = iter_bss; | |
1539 | } | |
876c9d3a | 1540 | |
fcdb53db DW |
1541 | if (found) { |
1542 | /* found, clear it */ | |
1543 | clear_bss_descriptor(found); | |
aa21c004 | 1544 | } else if (!list_empty(&priv->network_free_list)) { |
fcdb53db | 1545 | /* Pull one from the free list */ |
aa21c004 | 1546 | found = list_entry(priv->network_free_list.next, |
fcdb53db | 1547 | struct bss_descriptor, list); |
aa21c004 | 1548 | list_move_tail(&found->list, &priv->network_list); |
fcdb53db DW |
1549 | } else if (oldest) { |
1550 | /* If there are no more slots, expire the oldest */ | |
1551 | found = oldest; | |
1552 | clear_bss_descriptor(found); | |
aa21c004 | 1553 | list_move_tail(&found->list, &priv->network_list); |
876c9d3a | 1554 | } else { |
fcdb53db DW |
1555 | continue; |
1556 | } | |
876c9d3a | 1557 | |
fa62f99c | 1558 | lbs_deb_scan("SCAN_RESP: BSSID %s\n", print_mac(mac, new.bssid)); |
fcdb53db | 1559 | |
fcdb53db DW |
1560 | /* Copy the locally created newbssentry to the scan table */ |
1561 | memcpy(found, &new, offsetof(struct bss_descriptor, list)); | |
1562 | } | |
876c9d3a | 1563 | |
9012b28a | 1564 | ret = 0; |
876c9d3a | 1565 | |
9012b28a HS |
1566 | done: |
1567 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
1568 | return ret; | |
876c9d3a | 1569 | } |