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 | */ | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
7e272fcf | 8 | #include <linux/types.h> |
430453fc | 9 | #include <linux/kernel.h> |
fcdb53db | 10 | #include <linux/etherdevice.h> |
2c706002 | 11 | #include <linux/if_arp.h> |
ac630c2b | 12 | #include <asm/unaligned.h> |
7e272fcf JL |
13 | #include <net/lib80211.h> |
14 | ||
876c9d3a | 15 | #include "host.h" |
876c9d3a MT |
16 | #include "dev.h" |
17 | #include "scan.h" | |
2d46502d | 18 | #include "assoc.h" |
e93156e7 | 19 | #include "wext.h" |
fa62f99c | 20 | #include "cmd.h" |
876c9d3a MT |
21 | |
22 | //! Approximate amount of data needed to pass a scan result back to iwlist | |
23 | #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \ | |
243e84e9 | 24 | + IEEE80211_MAX_SSID_LEN \ |
876c9d3a MT |
25 | + IW_EV_UINT_LEN \ |
26 | + IW_EV_FREQ_LEN \ | |
27 | + IW_EV_QUAL_LEN \ | |
243e84e9 | 28 | + IEEE80211_MAX_SSID_LEN \ |
876c9d3a MT |
29 | + IW_EV_PARAM_LEN \ |
30 | + 40) /* 40 for WPAIE */ | |
31 | ||
32 | //! Memory needed to store a max sized channel List TLV for a firmware scan | |
75b6a61a | 33 | #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvl_ie_header) \ |
876c9d3a MT |
34 | + (MRVDRV_MAX_CHANNELS_PER_SCAN \ |
35 | * sizeof(struct chanscanparamset))) | |
36 | ||
37 | //! Memory needed to store a max number/size SSID TLV for a firmware scan | |
75b6a61a | 38 | #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvl_ie_ssid_param_set)) |
876c9d3a | 39 | |
fa62f99c DW |
40 | //! Maximum memory needed for a cmd_ds_802_11_scan with all TLVs at max |
41 | #define MAX_SCAN_CFG_ALLOC (sizeof(struct cmd_ds_802_11_scan) \ | |
42 | + CHAN_TLV_MAX_SIZE + SSID_TLV_MAX_SIZE) | |
876c9d3a MT |
43 | |
44 | //! The maximum number of channels the firmware can scan per command | |
45 | #define MRVDRV_MAX_CHANNELS_PER_SCAN 14 | |
46 | ||
47 | /** | |
48 | * @brief Number of channels to scan per firmware scan command issuance. | |
49 | * | |
50 | * Number restricted to prevent hitting the limit on the amount of scan data | |
51 | * returned in a single firmware scan command. | |
52 | */ | |
53 | #define MRVDRV_CHANNELS_PER_SCAN_CMD 4 | |
54 | ||
55 | //! Scan time specified in the channel TLV for each channel for passive scans | |
56 | #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100 | |
57 | ||
58 | //! Scan time specified in the channel TLV for each channel for active scans | |
59 | #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100 | |
60 | ||
2c706002 JB |
61 | #define DEFAULT_MAX_SCAN_AGE (15 * HZ) |
62 | ||
fa62f99c DW |
63 | static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy, |
64 | struct cmd_header *resp); | |
e56188ac HS |
65 | |
66 | /*********************************************************************/ | |
67 | /* */ | |
68 | /* Misc helper functions */ | |
69 | /* */ | |
70 | /*********************************************************************/ | |
71 | ||
23ff5036 HS |
72 | /** |
73 | * @brief Unsets the MSB on basic rates | |
74 | * | |
75 | * Scan through an array and unset the MSB for basic data rates. | |
76 | * | |
77 | * @param rates buffer of data rates | |
78 | * @param len size of buffer | |
79 | */ | |
80 | static void lbs_unset_basic_rate_flags(u8 *rates, size_t len) | |
81 | { | |
82 | int i; | |
83 | ||
84 | for (i = 0; i < len; i++) | |
85 | rates[i] &= 0x7f; | |
86 | } | |
87 | ||
88 | ||
f137e054 | 89 | static inline void clear_bss_descriptor(struct bss_descriptor *bss) |
fcdb53db DW |
90 | { |
91 | /* Don't blow away ->list, just BSS data */ | |
92 | memset(bss, 0, offsetof(struct bss_descriptor, list)); | |
93 | } | |
94 | ||
ffd074fc HS |
95 | /** |
96 | * @brief Compare two SSIDs | |
97 | * | |
98 | * @param ssid1 A pointer to ssid to compare | |
99 | * @param ssid2 A pointer to ssid to compare | |
100 | * | |
101 | * @return 0: ssid is same, otherwise is different | |
102 | */ | |
f137e054 DW |
103 | int lbs_ssid_cmp(uint8_t *ssid1, uint8_t ssid1_len, uint8_t *ssid2, |
104 | uint8_t ssid2_len) | |
ffd074fc HS |
105 | { |
106 | if (ssid1_len != ssid2_len) | |
107 | return -1; | |
108 | ||
109 | return memcmp(ssid1, ssid2, ssid1_len); | |
110 | } | |
111 | ||
ffd074fc HS |
112 | static inline int is_same_network(struct bss_descriptor *src, |
113 | struct bss_descriptor *dst) | |
114 | { | |
115 | /* A network is only a duplicate if the channel, BSSID, and ESSID | |
116 | * all match. We treat all <hidden> with the same BSSID and channel | |
117 | * as one network */ | |
118 | return ((src->ssid_len == dst->ssid_len) && | |
119 | (src->channel == dst->channel) && | |
120 | !compare_ether_addr(src->bssid, dst->bssid) && | |
121 | !memcmp(src->ssid, dst->ssid, src->ssid_len)); | |
122 | } | |
123 | ||
876c9d3a | 124 | |
e56188ac | 125 | |
2d46502d HS |
126 | /*********************************************************************/ |
127 | /* */ | |
128 | /* Region channel support */ | |
129 | /* */ | |
130 | /*********************************************************************/ | |
131 | ||
132 | #define LBS_TX_PWR_DEFAULT 20 /*100mW */ | |
133 | #define LBS_TX_PWR_US_DEFAULT 20 /*100mW */ | |
134 | #define LBS_TX_PWR_JP_DEFAULT 16 /*50mW */ | |
135 | #define LBS_TX_PWR_FR_DEFAULT 20 /*100mW */ | |
136 | #define LBS_TX_PWR_EMEA_DEFAULT 20 /*100mW */ | |
137 | ||
138 | /* Format { channel, frequency (MHz), maxtxpower } */ | |
139 | /* band: 'B/G', region: USA FCC/Canada IC */ | |
140 | static struct chan_freq_power channel_freq_power_US_BG[] = { | |
141 | {1, 2412, LBS_TX_PWR_US_DEFAULT}, | |
142 | {2, 2417, LBS_TX_PWR_US_DEFAULT}, | |
143 | {3, 2422, LBS_TX_PWR_US_DEFAULT}, | |
144 | {4, 2427, LBS_TX_PWR_US_DEFAULT}, | |
145 | {5, 2432, LBS_TX_PWR_US_DEFAULT}, | |
146 | {6, 2437, LBS_TX_PWR_US_DEFAULT}, | |
147 | {7, 2442, LBS_TX_PWR_US_DEFAULT}, | |
148 | {8, 2447, LBS_TX_PWR_US_DEFAULT}, | |
149 | {9, 2452, LBS_TX_PWR_US_DEFAULT}, | |
150 | {10, 2457, LBS_TX_PWR_US_DEFAULT}, | |
151 | {11, 2462, LBS_TX_PWR_US_DEFAULT} | |
152 | }; | |
153 | ||
154 | /* band: 'B/G', region: Europe ETSI */ | |
155 | static struct chan_freq_power channel_freq_power_EU_BG[] = { | |
156 | {1, 2412, LBS_TX_PWR_EMEA_DEFAULT}, | |
157 | {2, 2417, LBS_TX_PWR_EMEA_DEFAULT}, | |
158 | {3, 2422, LBS_TX_PWR_EMEA_DEFAULT}, | |
159 | {4, 2427, LBS_TX_PWR_EMEA_DEFAULT}, | |
160 | {5, 2432, LBS_TX_PWR_EMEA_DEFAULT}, | |
161 | {6, 2437, LBS_TX_PWR_EMEA_DEFAULT}, | |
162 | {7, 2442, LBS_TX_PWR_EMEA_DEFAULT}, | |
163 | {8, 2447, LBS_TX_PWR_EMEA_DEFAULT}, | |
164 | {9, 2452, LBS_TX_PWR_EMEA_DEFAULT}, | |
165 | {10, 2457, LBS_TX_PWR_EMEA_DEFAULT}, | |
166 | {11, 2462, LBS_TX_PWR_EMEA_DEFAULT}, | |
167 | {12, 2467, LBS_TX_PWR_EMEA_DEFAULT}, | |
168 | {13, 2472, LBS_TX_PWR_EMEA_DEFAULT} | |
169 | }; | |
170 | ||
171 | /* band: 'B/G', region: Spain */ | |
172 | static struct chan_freq_power channel_freq_power_SPN_BG[] = { | |
173 | {10, 2457, LBS_TX_PWR_DEFAULT}, | |
174 | {11, 2462, LBS_TX_PWR_DEFAULT} | |
175 | }; | |
176 | ||
177 | /* band: 'B/G', region: France */ | |
178 | static struct chan_freq_power channel_freq_power_FR_BG[] = { | |
179 | {10, 2457, LBS_TX_PWR_FR_DEFAULT}, | |
180 | {11, 2462, LBS_TX_PWR_FR_DEFAULT}, | |
181 | {12, 2467, LBS_TX_PWR_FR_DEFAULT}, | |
182 | {13, 2472, LBS_TX_PWR_FR_DEFAULT} | |
183 | }; | |
184 | ||
185 | /* band: 'B/G', region: Japan */ | |
186 | static struct chan_freq_power channel_freq_power_JPN_BG[] = { | |
187 | {1, 2412, LBS_TX_PWR_JP_DEFAULT}, | |
188 | {2, 2417, LBS_TX_PWR_JP_DEFAULT}, | |
189 | {3, 2422, LBS_TX_PWR_JP_DEFAULT}, | |
190 | {4, 2427, LBS_TX_PWR_JP_DEFAULT}, | |
191 | {5, 2432, LBS_TX_PWR_JP_DEFAULT}, | |
192 | {6, 2437, LBS_TX_PWR_JP_DEFAULT}, | |
193 | {7, 2442, LBS_TX_PWR_JP_DEFAULT}, | |
194 | {8, 2447, LBS_TX_PWR_JP_DEFAULT}, | |
195 | {9, 2452, LBS_TX_PWR_JP_DEFAULT}, | |
196 | {10, 2457, LBS_TX_PWR_JP_DEFAULT}, | |
197 | {11, 2462, LBS_TX_PWR_JP_DEFAULT}, | |
198 | {12, 2467, LBS_TX_PWR_JP_DEFAULT}, | |
199 | {13, 2472, LBS_TX_PWR_JP_DEFAULT}, | |
200 | {14, 2484, LBS_TX_PWR_JP_DEFAULT} | |
201 | }; | |
202 | ||
203 | /** | |
204 | * the structure for channel, frequency and power | |
205 | */ | |
206 | struct region_cfp_table { | |
207 | u8 region; | |
208 | struct chan_freq_power *cfp_BG; | |
209 | int cfp_no_BG; | |
210 | }; | |
211 | ||
212 | /** | |
213 | * the structure for the mapping between region and CFP | |
214 | */ | |
215 | static struct region_cfp_table region_cfp_table[] = { | |
216 | {0x10, /*US FCC */ | |
217 | channel_freq_power_US_BG, | |
218 | ARRAY_SIZE(channel_freq_power_US_BG), | |
219 | } | |
220 | , | |
221 | {0x20, /*CANADA IC */ | |
222 | channel_freq_power_US_BG, | |
223 | ARRAY_SIZE(channel_freq_power_US_BG), | |
224 | } | |
225 | , | |
226 | {0x30, /*EU*/ channel_freq_power_EU_BG, | |
227 | ARRAY_SIZE(channel_freq_power_EU_BG), | |
228 | } | |
229 | , | |
230 | {0x31, /*SPAIN*/ channel_freq_power_SPN_BG, | |
231 | ARRAY_SIZE(channel_freq_power_SPN_BG), | |
232 | } | |
233 | , | |
234 | {0x32, /*FRANCE*/ channel_freq_power_FR_BG, | |
235 | ARRAY_SIZE(channel_freq_power_FR_BG), | |
236 | } | |
237 | , | |
238 | {0x40, /*JAPAN*/ channel_freq_power_JPN_BG, | |
239 | ARRAY_SIZE(channel_freq_power_JPN_BG), | |
240 | } | |
241 | , | |
242 | /*Add new region here */ | |
243 | }; | |
244 | ||
245 | /** | |
246 | * @brief This function finds the CFP in | |
247 | * region_cfp_table based on region and band parameter. | |
248 | * | |
249 | * @param region The region code | |
250 | * @param band The band | |
251 | * @param cfp_no A pointer to CFP number | |
252 | * @return A pointer to CFP | |
253 | */ | |
254 | static struct chan_freq_power *lbs_get_region_cfp_table(u8 region, int *cfp_no) | |
255 | { | |
256 | int i, end; | |
257 | ||
258 | lbs_deb_enter(LBS_DEB_MAIN); | |
259 | ||
260 | end = ARRAY_SIZE(region_cfp_table); | |
261 | ||
262 | for (i = 0; i < end ; i++) { | |
263 | lbs_deb_main("region_cfp_table[i].region=%d\n", | |
264 | region_cfp_table[i].region); | |
265 | if (region_cfp_table[i].region == region) { | |
266 | *cfp_no = region_cfp_table[i].cfp_no_BG; | |
267 | lbs_deb_leave(LBS_DEB_MAIN); | |
268 | return region_cfp_table[i].cfp_BG; | |
269 | } | |
270 | } | |
271 | ||
272 | lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL"); | |
273 | return NULL; | |
274 | } | |
275 | ||
276 | int lbs_set_regiontable(struct lbs_private *priv, u8 region, u8 band) | |
277 | { | |
278 | int ret = 0; | |
279 | int i = 0; | |
280 | ||
281 | struct chan_freq_power *cfp; | |
282 | int cfp_no; | |
283 | ||
284 | lbs_deb_enter(LBS_DEB_MAIN); | |
285 | ||
286 | memset(priv->region_channel, 0, sizeof(priv->region_channel)); | |
287 | ||
288 | cfp = lbs_get_region_cfp_table(region, &cfp_no); | |
289 | if (cfp != NULL) { | |
290 | priv->region_channel[i].nrcfp = cfp_no; | |
291 | priv->region_channel[i].CFP = cfp; | |
292 | } else { | |
293 | lbs_deb_main("wrong region code %#x in band B/G\n", | |
294 | region); | |
295 | ret = -1; | |
296 | goto out; | |
297 | } | |
298 | priv->region_channel[i].valid = 1; | |
299 | priv->region_channel[i].region = region; | |
300 | priv->region_channel[i].band = band; | |
301 | i++; | |
302 | out: | |
303 | lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret); | |
304 | return ret; | |
305 | } | |
306 | ||
307 | ||
308 | ||
e56188ac | 309 | |
e56188ac HS |
310 | /*********************************************************************/ |
311 | /* */ | |
312 | /* Main scanning support */ | |
313 | /* */ | |
314 | /*********************************************************************/ | |
315 | ||
876c9d3a MT |
316 | /** |
317 | * @brief Create a channel list for the driver to scan based on region info | |
318 | * | |
10078321 | 319 | * Only used from lbs_scan_setup_scan_config() |
e56188ac | 320 | * |
876c9d3a MT |
321 | * Use the driver region/band information to construct a comprehensive list |
322 | * of channels to scan. This routine is used for any scan that is not | |
323 | * provided a specific channel list to scan. | |
324 | * | |
69f9032d | 325 | * @param priv A pointer to struct lbs_private structure |
876c9d3a | 326 | * @param scanchanlist Output parameter: resulting channel list to scan |
876c9d3a MT |
327 | * |
328 | * @return void | |
329 | */ | |
ffd074fc | 330 | static int lbs_scan_create_channel_list(struct lbs_private *priv, |
52933d81 | 331 | struct chanscanparamset *scanchanlist) |
876c9d3a | 332 | { |
876c9d3a MT |
333 | struct region_channel *scanregion; |
334 | struct chan_freq_power *cfp; | |
335 | int rgnidx; | |
336 | int chanidx; | |
337 | int nextchan; | |
f137e054 | 338 | uint8_t scantype; |
876c9d3a MT |
339 | |
340 | chanidx = 0; | |
341 | ||
342 | /* Set the default scan type to the user specified type, will later | |
343 | * be changed to passive on a per channel basis if restricted by | |
344 | * regulatory requirements (11d or 11h) | |
345 | */ | |
4f2fdaaf | 346 | scantype = CMD_SCAN_TYPE_ACTIVE; |
876c9d3a | 347 | |
aa21c004 | 348 | for (rgnidx = 0; rgnidx < ARRAY_SIZE(priv->region_channel); rgnidx++) { |
d37b4fdd HS |
349 | if (!priv->region_channel[rgnidx].valid) |
350 | continue; | |
351 | scanregion = &priv->region_channel[rgnidx]; | |
876c9d3a | 352 | |
f137e054 DW |
353 | for (nextchan = 0; nextchan < scanregion->nrcfp; nextchan++, chanidx++) { |
354 | struct chanscanparamset *chan = &scanchanlist[chanidx]; | |
876c9d3a MT |
355 | |
356 | cfp = scanregion->CFP + nextchan; | |
357 | ||
f137e054 DW |
358 | if (scanregion->band == BAND_B || scanregion->band == BAND_G) |
359 | chan->radiotype = CMD_SCAN_RADIO_TYPE_BG; | |
876c9d3a | 360 | |
0aef64d7 | 361 | if (scantype == CMD_SCAN_TYPE_PASSIVE) { |
f137e054 DW |
362 | chan->maxscantime = cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME); |
363 | chan->chanscanmode.passivescan = 1; | |
876c9d3a | 364 | } else { |
f137e054 DW |
365 | chan->maxscantime = cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME); |
366 | chan->chanscanmode.passivescan = 0; | |
876c9d3a MT |
367 | } |
368 | ||
f137e054 | 369 | chan->channumber = cfp->channel; |
876c9d3a MT |
370 | } |
371 | } | |
ffd074fc | 372 | return chanidx; |
876c9d3a MT |
373 | } |
374 | ||
ffd074fc HS |
375 | /* |
376 | * Add SSID TLV of the form: | |
377 | * | |
378 | * TLV-ID SSID 00 00 | |
379 | * length 06 00 | |
380 | * ssid 4d 4e 54 45 53 54 | |
381 | */ | |
52933d81 | 382 | static int lbs_scan_add_ssid_tlv(struct lbs_private *priv, u8 *tlv) |
2afc0c5d | 383 | { |
75b6a61a | 384 | struct mrvl_ie_ssid_param_set *ssid_tlv = (void *)tlv; |
f137e054 | 385 | |
ffd074fc | 386 | ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID); |
52933d81 HS |
387 | ssid_tlv->header.len = cpu_to_le16(priv->scan_ssid_len); |
388 | memcpy(ssid_tlv->ssid, priv->scan_ssid, priv->scan_ssid_len); | |
389 | return sizeof(ssid_tlv->header) + priv->scan_ssid_len; | |
2afc0c5d DW |
390 | } |
391 | ||
ffd074fc HS |
392 | /* |
393 | * Add CHANLIST TLV of the form | |
876c9d3a | 394 | * |
ffd074fc HS |
395 | * TLV-ID CHANLIST 01 01 |
396 | * length 5b 00 | |
397 | * channel 1 00 01 00 00 00 64 00 | |
398 | * radio type 00 | |
399 | * channel 01 | |
400 | * scan type 00 | |
401 | * min scan time 00 00 | |
402 | * max scan time 64 00 | |
403 | * channel 2 00 02 00 00 00 64 00 | |
404 | * channel 3 00 03 00 00 00 64 00 | |
405 | * channel 4 00 04 00 00 00 64 00 | |
406 | * channel 5 00 05 00 00 00 64 00 | |
407 | * channel 6 00 06 00 00 00 64 00 | |
408 | * channel 7 00 07 00 00 00 64 00 | |
409 | * channel 8 00 08 00 00 00 64 00 | |
410 | * channel 9 00 09 00 00 00 64 00 | |
411 | * channel 10 00 0a 00 00 00 64 00 | |
412 | * channel 11 00 0b 00 00 00 64 00 | |
413 | * channel 12 00 0c 00 00 00 64 00 | |
414 | * channel 13 00 0d 00 00 00 64 00 | |
876c9d3a | 415 | * |
876c9d3a | 416 | */ |
f137e054 DW |
417 | static int lbs_scan_add_chanlist_tlv(uint8_t *tlv, |
418 | struct chanscanparamset *chan_list, | |
419 | int chan_count) | |
876c9d3a | 420 | { |
f137e054 | 421 | size_t size = sizeof(struct chanscanparamset) *chan_count; |
75b6a61a | 422 | struct mrvl_ie_chanlist_param_set *chan_tlv = (void *)tlv; |
ffd074fc HS |
423 | |
424 | chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); | |
425 | memcpy(chan_tlv->chanscanparam, chan_list, size); | |
426 | chan_tlv->header.len = cpu_to_le16(size); | |
427 | return sizeof(chan_tlv->header) + size; | |
876c9d3a MT |
428 | } |
429 | ||
ffd074fc HS |
430 | /* |
431 | * Add RATES TLV of the form | |
876c9d3a | 432 | * |
ffd074fc HS |
433 | * TLV-ID RATES 01 00 |
434 | * length 0e 00 | |
435 | * rates 82 84 8b 96 0c 12 18 24 30 48 60 6c | |
876c9d3a | 436 | * |
ffd074fc HS |
437 | * The rates are in lbs_bg_rates[], but for the 802.11b |
438 | * rates the high bit isn't set. | |
876c9d3a | 439 | */ |
f137e054 | 440 | static int lbs_scan_add_rates_tlv(uint8_t *tlv) |
876c9d3a | 441 | { |
ffd074fc | 442 | int i; |
75b6a61a | 443 | struct mrvl_ie_rates_param_set *rate_tlv = (void *)tlv; |
ffd074fc HS |
444 | |
445 | rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES); | |
446 | tlv += sizeof(rate_tlv->header); | |
447 | for (i = 0; i < MAX_RATES; i++) { | |
448 | *tlv = lbs_bg_rates[i]; | |
449 | if (*tlv == 0) | |
450 | break; | |
451 | /* This code makes sure that the 802.11b rates (1 MBit/s, 2 | |
452 | MBit/s, 5.5 MBit/s and 11 MBit/s get's the high bit set. | |
453 | Note that the values are MBit/s * 2, to mark them as | |
454 | basic rates so that the firmware likes it better */ | |
455 | if (*tlv == 0x02 || *tlv == 0x04 || | |
456 | *tlv == 0x0b || *tlv == 0x16) | |
457 | *tlv |= 0x80; | |
458 | tlv++; | |
2afc0c5d | 459 | } |
ffd074fc HS |
460 | rate_tlv->header.len = cpu_to_le16(i); |
461 | return sizeof(rate_tlv->header) + i; | |
876c9d3a MT |
462 | } |
463 | ||
e56188ac | 464 | /* |
ffd074fc HS |
465 | * Generate the CMD_802_11_SCAN command with the proper tlv |
466 | * for a bunch of channels. | |
467 | */ | |
fa62f99c | 468 | static int lbs_do_scan(struct lbs_private *priv, uint8_t bsstype, |
52933d81 | 469 | struct chanscanparamset *chan_list, int chan_count) |
eb8f7330 | 470 | { |
ffd074fc | 471 | int ret = -ENOMEM; |
fa62f99c DW |
472 | struct cmd_ds_802_11_scan *scan_cmd; |
473 | uint8_t *tlv; /* pointer into our current, growing TLV storage area */ | |
eb8f7330 | 474 | |
fa62f99c | 475 | lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, chan_count %d", |
c0d43990 HS |
476 | bsstype, chan_list ? chan_list[0].channumber : -1, |
477 | chan_count); | |
e56188ac | 478 | |
ffd074fc HS |
479 | /* create the fixed part for scan command */ |
480 | scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL); | |
481 | if (scan_cmd == NULL) | |
e56188ac | 482 | goto out; |
fa62f99c | 483 | |
ffd074fc | 484 | tlv = scan_cmd->tlvbuffer; |
52933d81 HS |
485 | /* TODO: do we need to scan for a specific BSSID? |
486 | memcpy(scan_cmd->bssid, priv->scan_bssid, ETH_ALEN); */ | |
ffd074fc HS |
487 | scan_cmd->bsstype = bsstype; |
488 | ||
489 | /* add TLVs */ | |
52933d81 HS |
490 | if (priv->scan_ssid_len) |
491 | tlv += lbs_scan_add_ssid_tlv(priv, tlv); | |
ffd074fc HS |
492 | if (chan_list && chan_count) |
493 | tlv += lbs_scan_add_chanlist_tlv(tlv, chan_list, chan_count); | |
494 | tlv += lbs_scan_add_rates_tlv(tlv); | |
495 | ||
496 | /* This is the final data we are about to send */ | |
fa62f99c DW |
497 | scan_cmd->hdr.size = cpu_to_le16(tlv - (uint8_t *)scan_cmd); |
498 | lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd, | |
499 | sizeof(*scan_cmd)); | |
ffd074fc | 500 | lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer, |
fa62f99c DW |
501 | tlv - scan_cmd->tlvbuffer); |
502 | ||
503 | ret = __lbs_cmd(priv, CMD_802_11_SCAN, &scan_cmd->hdr, | |
504 | le16_to_cpu(scan_cmd->hdr.size), | |
505 | lbs_ret_80211_scan, 0); | |
ffd074fc | 506 | |
e56188ac | 507 | out: |
ffd074fc HS |
508 | kfree(scan_cmd); |
509 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
510 | return ret; | |
eb8f7330 DW |
511 | } |
512 | ||
876c9d3a MT |
513 | /** |
514 | * @brief Internal function used to start a scan based on an input config | |
515 | * | |
516 | * Use the input user scan configuration information when provided in | |
517 | * order to send the appropriate scan commands to firmware to populate or | |
518 | * update the internal driver scan table | |
519 | * | |
69f9032d | 520 | * @param priv A pointer to struct lbs_private structure |
52933d81 | 521 | * @param full_scan Do a full-scan (blocking) |
876c9d3a MT |
522 | * |
523 | * @return 0 or < 0 if error | |
524 | */ | |
245bf20f | 525 | int lbs_scan_networks(struct lbs_private *priv, int full_scan) |
876c9d3a | 526 | { |
ffd074fc HS |
527 | int ret = -ENOMEM; |
528 | struct chanscanparamset *chan_list; | |
529 | struct chanscanparamset *curr_chans; | |
530 | int chan_count; | |
f137e054 | 531 | uint8_t bsstype = CMD_BSS_TYPE_ANY; |
ffd074fc | 532 | int numchannels = MRVDRV_CHANNELS_PER_SCAN_CMD; |
ffd074fc | 533 | union iwreq_data wrqu; |
f8f55108 | 534 | #ifdef CONFIG_LIBERTAS_DEBUG |
ffd074fc | 535 | struct bss_descriptor *iter; |
f8f55108 | 536 | int i = 0; |
9387b7ca | 537 | DECLARE_SSID_BUF(ssid); |
f8f55108 | 538 | #endif |
876c9d3a | 539 | |
f137e054 | 540 | lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", full_scan); |
2afc0c5d DW |
541 | |
542 | /* Cancel any partial outstanding partial scans if this scan | |
543 | * is a full scan. | |
544 | */ | |
545 | if (full_scan && delayed_work_pending(&priv->scan_work)) | |
546 | cancel_delayed_work(&priv->scan_work); | |
876c9d3a | 547 | |
52933d81 HS |
548 | /* User-specified bsstype or channel list |
549 | TODO: this can be implemented if some user-space application | |
550 | need the feature. Formerly, it was accessible from debugfs, | |
551 | but then nowhere used. | |
ffd074fc HS |
552 | if (user_cfg) { |
553 | if (user_cfg->bsstype) | |
52933d81 HS |
554 | bsstype = user_cfg->bsstype; |
555 | } */ | |
556 | ||
557 | lbs_deb_scan("numchannels %d, bsstype %d\n", numchannels, bsstype); | |
876c9d3a | 558 | |
ffd074fc HS |
559 | /* Create list of channels to scan */ |
560 | chan_list = kzalloc(sizeof(struct chanscanparamset) * | |
f137e054 | 561 | LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL); |
ffd074fc HS |
562 | if (!chan_list) { |
563 | lbs_pr_alert("SCAN: chan_list empty\n"); | |
876c9d3a MT |
564 | goto out; |
565 | } | |
566 | ||
ffd074fc | 567 | /* We want to scan all channels */ |
52933d81 | 568 | chan_count = lbs_scan_create_channel_list(priv, chan_list); |
876c9d3a | 569 | |
ffd074fc | 570 | netif_stop_queue(priv->dev); |
659c8e52 | 571 | if (priv->mesh_dev) |
a27b9f96 | 572 | netif_stop_queue(priv->mesh_dev); |
876c9d3a | 573 | |
ffd074fc | 574 | /* Prepare to continue an interrupted scan */ |
8816edce HS |
575 | lbs_deb_scan("chan_count %d, scan_channel %d\n", |
576 | chan_count, priv->scan_channel); | |
ffd074fc HS |
577 | curr_chans = chan_list; |
578 | /* advance channel list by already-scanned-channels */ | |
8816edce HS |
579 | if (priv->scan_channel > 0) { |
580 | curr_chans += priv->scan_channel; | |
581 | chan_count -= priv->scan_channel; | |
ffd074fc HS |
582 | } |
583 | ||
584 | /* Send scan command(s) | |
585 | * numchannels contains the number of channels we should maximally scan | |
586 | * chan_count is the total number of channels to scan | |
587 | */ | |
588 | ||
589 | while (chan_count) { | |
590 | int to_scan = min(numchannels, chan_count); | |
591 | lbs_deb_scan("scanning %d of %d channels\n", | |
f137e054 | 592 | to_scan, chan_count); |
ffd074fc | 593 | ret = lbs_do_scan(priv, bsstype, curr_chans, |
52933d81 | 594 | to_scan); |
ffd074fc HS |
595 | if (ret) { |
596 | lbs_pr_err("SCAN_CMD failed\n"); | |
597 | goto out2; | |
598 | } | |
599 | curr_chans += to_scan; | |
600 | chan_count -= to_scan; | |
601 | ||
602 | /* somehow schedule the next part of the scan */ | |
f137e054 | 603 | if (chan_count && !full_scan && |
aa21c004 | 604 | !priv->surpriseremoved) { |
ffd074fc | 605 | /* -1 marks just that we're currently scanning */ |
8816edce HS |
606 | if (priv->scan_channel < 0) |
607 | priv->scan_channel = to_scan; | |
ffd074fc | 608 | else |
8816edce | 609 | priv->scan_channel += to_scan; |
ffd074fc HS |
610 | cancel_delayed_work(&priv->scan_work); |
611 | queue_delayed_work(priv->work_thread, &priv->scan_work, | |
f137e054 | 612 | msecs_to_jiffies(300)); |
ffd074fc HS |
613 | /* skip over GIWSCAN event */ |
614 | goto out; | |
615 | } | |
616 | ||
617 | } | |
618 | memset(&wrqu, 0, sizeof(union iwreq_data)); | |
619 | wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL); | |
876c9d3a | 620 | |
f8f55108 DW |
621 | #ifdef CONFIG_LIBERTAS_DEBUG |
622 | /* Dump the scan table */ | |
aa21c004 | 623 | mutex_lock(&priv->lock); |
ffd074fc | 624 | lbs_deb_scan("scan table:\n"); |
aa21c004 | 625 | list_for_each_entry(iter, &priv->network_list, list) |
e174961c JB |
626 | lbs_deb_scan("%02d: BSSID %pM, RSSI %d, SSID '%s'\n", |
627 | i++, iter->bssid, iter->rssi, | |
9387b7ca | 628 | print_ssid(ssid, iter->ssid, iter->ssid_len)); |
aa21c004 | 629 | mutex_unlock(&priv->lock); |
f8f55108 | 630 | #endif |
876c9d3a | 631 | |
ffd074fc | 632 | out2: |
8816edce | 633 | priv->scan_channel = 0; |
ffd074fc HS |
634 | |
635 | out: | |
659c8e52 SO |
636 | if (priv->connect_status == LBS_CONNECTED && !priv->tx_pending_len) |
637 | netif_wake_queue(priv->dev); | |
638 | ||
891dc5e7 | 639 | if (priv->mesh_dev && lbs_mesh_connected(priv) && |
659c8e52 SO |
640 | !priv->tx_pending_len) |
641 | netif_wake_queue(priv->mesh_dev); | |
642 | ||
ffd074fc | 643 | kfree(chan_list); |
876c9d3a | 644 | |
9012b28a | 645 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
876c9d3a MT |
646 | return ret; |
647 | } | |
648 | ||
52933d81 HS |
649 | void lbs_scan_worker(struct work_struct *work) |
650 | { | |
651 | struct lbs_private *priv = | |
652 | container_of(work, struct lbs_private, scan_work.work); | |
653 | ||
654 | lbs_deb_enter(LBS_DEB_SCAN); | |
655 | lbs_scan_networks(priv, 0); | |
656 | lbs_deb_leave(LBS_DEB_SCAN); | |
657 | } | |
658 | ||
659 | ||
ffd074fc HS |
660 | /*********************************************************************/ |
661 | /* */ | |
662 | /* Result interpretation */ | |
663 | /* */ | |
664 | /*********************************************************************/ | |
665 | ||
876c9d3a MT |
666 | /** |
667 | * @brief Interpret a BSS scan response returned from the firmware | |
668 | * | |
669 | * Parse the various fixed fields and IEs passed back for a a BSS probe | |
ffd074fc HS |
670 | * response or beacon from the scan command. Record information as needed |
671 | * in the scan table struct bss_descriptor for that entry. | |
876c9d3a | 672 | * |
fcdb53db | 673 | * @param bss Output parameter: Pointer to the BSS Entry |
876c9d3a MT |
674 | * |
675 | * @return 0 or -1 | |
676 | */ | |
10078321 | 677 | static int lbs_process_bss(struct bss_descriptor *bss, |
f137e054 | 678 | uint8_t **pbeaconinfo, int *bytesleft) |
876c9d3a | 679 | { |
5fd164e9 DW |
680 | struct ieee_ie_fh_param_set *fh; |
681 | struct ieee_ie_ds_param_set *ds; | |
682 | struct ieee_ie_cf_param_set *cf; | |
683 | struct ieee_ie_ibss_param_set *ibss; | |
9387b7ca | 684 | DECLARE_SSID_BUF(ssid); |
f137e054 DW |
685 | uint8_t *pos, *end, *p; |
686 | uint8_t n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0; | |
687 | uint16_t beaconsize = 0; | |
8c512765 | 688 | int ret; |
876c9d3a | 689 | |
e56188ac | 690 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 691 | |
876c9d3a MT |
692 | if (*bytesleft >= sizeof(beaconsize)) { |
693 | /* Extract & convert beacon size from the command buffer */ | |
533dd1b0 | 694 | beaconsize = get_unaligned_le16(*pbeaconinfo); |
876c9d3a MT |
695 | *bytesleft -= sizeof(beaconsize); |
696 | *pbeaconinfo += sizeof(beaconsize); | |
697 | } | |
698 | ||
699 | if (beaconsize == 0 || beaconsize > *bytesleft) { | |
876c9d3a MT |
700 | *pbeaconinfo += *bytesleft; |
701 | *bytesleft = 0; | |
e56188ac HS |
702 | ret = -1; |
703 | goto done; | |
876c9d3a MT |
704 | } |
705 | ||
706 | /* Initialize the current working beacon pointer for this BSS iteration */ | |
ab617971 DW |
707 | pos = *pbeaconinfo; |
708 | end = pos + beaconsize; | |
876c9d3a MT |
709 | |
710 | /* Advance the return beacon pointer past the current beacon */ | |
711 | *pbeaconinfo += beaconsize; | |
712 | *bytesleft -= beaconsize; | |
713 | ||
ab617971 | 714 | memcpy(bss->bssid, pos, ETH_ALEN); |
e174961c | 715 | lbs_deb_scan("process_bss: BSSID %pM\n", bss->bssid); |
ab617971 | 716 | pos += ETH_ALEN; |
876c9d3a | 717 | |
ab617971 | 718 | if ((end - pos) < 12) { |
fcdb53db | 719 | lbs_deb_scan("process_bss: Not enough bytes left\n"); |
e56188ac HS |
720 | ret = -1; |
721 | goto done; | |
876c9d3a MT |
722 | } |
723 | ||
724 | /* | |
725 | * next 4 fields are RSSI, time stamp, beacon interval, | |
726 | * and capability information | |
727 | */ | |
728 | ||
729 | /* RSSI is 1 byte long */ | |
ab617971 | 730 | bss->rssi = *pos; |
ffd074fc | 731 | lbs_deb_scan("process_bss: RSSI %d\n", *pos); |
ab617971 | 732 | pos++; |
876c9d3a MT |
733 | |
734 | /* time stamp is 8 bytes long */ | |
ab617971 | 735 | pos += 8; |
876c9d3a MT |
736 | |
737 | /* beacon interval is 2 bytes long */ | |
814feefa | 738 | bss->beaconperiod = get_unaligned_le16(pos); |
ab617971 | 739 | pos += 2; |
876c9d3a MT |
740 | |
741 | /* capability information is 2 bytes long */ | |
814feefa | 742 | bss->capability = get_unaligned_le16(pos); |
ffd074fc | 743 | lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability); |
ab617971 | 744 | pos += 2; |
876c9d3a | 745 | |
0c9ca690 | 746 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) |
ffd074fc | 747 | lbs_deb_scan("process_bss: WEP enabled\n"); |
0c9ca690 DW |
748 | if (bss->capability & WLAN_CAPABILITY_IBSS) |
749 | bss->mode = IW_MODE_ADHOC; | |
750 | else | |
751 | bss->mode = IW_MODE_INFRA; | |
752 | ||
876c9d3a | 753 | /* rest of the current buffer are IE's */ |
ffd074fc | 754 | lbs_deb_scan("process_bss: IE len %zd\n", end - pos); |
ece56191 | 755 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos); |
876c9d3a | 756 | |
876c9d3a | 757 | /* process variable IE */ |
ab617971 | 758 | while (pos <= end - 2) { |
2c706002 | 759 | if (pos + pos[1] > end) { |
fcdb53db | 760 | lbs_deb_scan("process_bss: error in processing IE, " |
f137e054 | 761 | "bytes left < IE length\n"); |
ab617971 | 762 | break; |
876c9d3a MT |
763 | } |
764 | ||
2c706002 JB |
765 | switch (pos[0]) { |
766 | case WLAN_EID_SSID: | |
767 | bss->ssid_len = min_t(int, IEEE80211_MAX_SSID_LEN, pos[1]); | |
768 | memcpy(bss->ssid, pos + 2, bss->ssid_len); | |
ffd074fc | 769 | lbs_deb_scan("got SSID IE: '%s', len %u\n", |
9387b7ca | 770 | print_ssid(ssid, bss->ssid, bss->ssid_len), |
d8efea25 | 771 | bss->ssid_len); |
876c9d3a MT |
772 | break; |
773 | ||
2c706002 JB |
774 | case WLAN_EID_SUPP_RATES: |
775 | n_basic_rates = min_t(uint8_t, MAX_RATES, pos[1]); | |
776 | memcpy(bss->rates, pos + 2, n_basic_rates); | |
8c512765 | 777 | got_basic_rates = 1; |
ffd074fc | 778 | lbs_deb_scan("got RATES IE\n"); |
876c9d3a MT |
779 | break; |
780 | ||
2c706002 | 781 | case WLAN_EID_FH_PARAMS: |
5fd164e9 DW |
782 | fh = (struct ieee_ie_fh_param_set *) pos; |
783 | memcpy(&bss->phy.fh, fh, sizeof(*fh)); | |
ffd074fc | 784 | lbs_deb_scan("got FH IE\n"); |
876c9d3a MT |
785 | break; |
786 | ||
2c706002 | 787 | case WLAN_EID_DS_PARAMS: |
5fd164e9 DW |
788 | ds = (struct ieee_ie_ds_param_set *) pos; |
789 | bss->channel = ds->channel; | |
790 | memcpy(&bss->phy.ds, ds, sizeof(*ds)); | |
ffd074fc | 791 | lbs_deb_scan("got DS IE, channel %d\n", bss->channel); |
876c9d3a MT |
792 | break; |
793 | ||
2c706002 | 794 | case WLAN_EID_CF_PARAMS: |
5fd164e9 DW |
795 | cf = (struct ieee_ie_cf_param_set *) pos; |
796 | memcpy(&bss->ss.cf, cf, sizeof(*cf)); | |
ffd074fc | 797 | lbs_deb_scan("got CF IE\n"); |
876c9d3a MT |
798 | break; |
799 | ||
2c706002 | 800 | case WLAN_EID_IBSS_PARAMS: |
5fd164e9 DW |
801 | ibss = (struct ieee_ie_ibss_param_set *) pos; |
802 | bss->atimwindow = ibss->atimwindow; | |
803 | memcpy(&bss->ss.ibss, ibss, sizeof(*ibss)); | |
ffd074fc | 804 | lbs_deb_scan("got IBSS IE\n"); |
876c9d3a MT |
805 | break; |
806 | ||
2c706002 | 807 | case WLAN_EID_EXT_SUPP_RATES: |
ab617971 DW |
808 | /* only process extended supported rate if data rate is |
809 | * already found. Data rate IE should come before | |
876c9d3a MT |
810 | * extended supported rate IE |
811 | */ | |
ffd074fc HS |
812 | lbs_deb_scan("got RATESEX IE\n"); |
813 | if (!got_basic_rates) { | |
814 | lbs_deb_scan("... but ignoring it\n"); | |
ab617971 | 815 | break; |
ffd074fc | 816 | } |
876c9d3a | 817 | |
2c706002 | 818 | n_ex_rates = pos[1]; |
8c512765 DW |
819 | if (n_basic_rates + n_ex_rates > MAX_RATES) |
820 | n_ex_rates = MAX_RATES - n_basic_rates; | |
876c9d3a | 821 | |
8c512765 | 822 | p = bss->rates + n_basic_rates; |
2c706002 | 823 | memcpy(p, pos + 2, n_ex_rates); |
876c9d3a | 824 | break; |
ab617971 | 825 | |
2c706002 JB |
826 | case WLAN_EID_GENERIC: |
827 | if (pos[1] >= 4 && | |
828 | pos[2] == 0x00 && pos[3] == 0x50 && | |
829 | pos[4] == 0xf2 && pos[5] == 0x01) { | |
830 | bss->wpa_ie_len = min(pos[1] + 2, MAX_WPA_IE_LEN); | |
831 | memcpy(bss->wpa_ie, pos, bss->wpa_ie_len); | |
ffd074fc | 832 | lbs_deb_scan("got WPA IE\n"); |
2c706002 JB |
833 | lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie, |
834 | bss->wpa_ie_len); | |
835 | } else if (pos[1] >= MARVELL_MESH_IE_LENGTH && | |
836 | pos[2] == 0x00 && pos[3] == 0x50 && | |
baf62eec | 837 | pos[4] == 0x43 && pos[5] == 0x04) { |
ffd074fc | 838 | lbs_deb_scan("got mesh IE\n"); |
1e838bf3 | 839 | bss->mesh = 1; |
ffd074fc | 840 | } else { |
f137e054 | 841 | lbs_deb_scan("got generic IE: %02x:%02x:%02x:%02x, len %d\n", |
2c706002 JB |
842 | pos[2], pos[3], |
843 | pos[4], pos[5], | |
844 | pos[1]); | |
ab617971 | 845 | } |
876c9d3a | 846 | break; |
ab617971 | 847 | |
2c706002 | 848 | case WLAN_EID_RSN: |
ffd074fc | 849 | lbs_deb_scan("got RSN IE\n"); |
2c706002 JB |
850 | bss->rsn_ie_len = min(pos[1] + 2, MAX_WPA_IE_LEN); |
851 | memcpy(bss->rsn_ie, pos, bss->rsn_ie_len); | |
ffd074fc | 852 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", |
2c706002 | 853 | bss->rsn_ie, bss->rsn_ie_len); |
876c9d3a MT |
854 | break; |
855 | ||
ab617971 | 856 | default: |
ffd074fc | 857 | lbs_deb_scan("got IE 0x%04x, len %d\n", |
2c706002 | 858 | pos[0], pos[1]); |
876c9d3a MT |
859 | break; |
860 | } | |
861 | ||
2c706002 | 862 | pos += pos[1] + 2; |
ab617971 | 863 | } |
fcdb53db DW |
864 | |
865 | /* Timestamp */ | |
866 | bss->last_scanned = jiffies; | |
10078321 | 867 | lbs_unset_basic_rate_flags(bss->rates, sizeof(bss->rates)); |
fcdb53db | 868 | |
9012b28a | 869 | ret = 0; |
876c9d3a | 870 | |
9012b28a HS |
871 | done: |
872 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
873 | return ret; | |
876c9d3a MT |
874 | } |
875 | ||
876c9d3a MT |
876 | /** |
877 | * @brief Send a scan command for all available channels filtered on a spec | |
878 | * | |
e56188ac HS |
879 | * Used in association code and from debugfs |
880 | * | |
69f9032d | 881 | * @param priv A pointer to struct lbs_private structure |
e56188ac HS |
882 | * @param ssid A pointer to the SSID to scan for |
883 | * @param ssid_len Length of the SSID | |
876c9d3a MT |
884 | * |
885 | * @return 0-success, otherwise fail | |
886 | */ | |
f137e054 | 887 | int lbs_send_specific_ssid_scan(struct lbs_private *priv, uint8_t *ssid, |
52933d81 | 888 | uint8_t ssid_len) |
876c9d3a | 889 | { |
9387b7ca | 890 | DECLARE_SSID_BUF(ssid_buf); |
eb8f7330 | 891 | int ret = 0; |
876c9d3a | 892 | |
52933d81 | 893 | lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s'\n", |
9387b7ca | 894 | print_ssid(ssid_buf, ssid, ssid_len)); |
876c9d3a | 895 | |
d8efea25 | 896 | if (!ssid_len) |
eb8f7330 | 897 | goto out; |
876c9d3a | 898 | |
52933d81 HS |
899 | memcpy(priv->scan_ssid, ssid, ssid_len); |
900 | priv->scan_ssid_len = ssid_len; | |
876c9d3a | 901 | |
52933d81 | 902 | lbs_scan_networks(priv, 1); |
aa21c004 | 903 | if (priv->surpriseremoved) { |
e56188ac HS |
904 | ret = -1; |
905 | goto out; | |
906 | } | |
876c9d3a | 907 | |
eb8f7330 | 908 | out: |
e56188ac | 909 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
eb8f7330 | 910 | return ret; |
876c9d3a MT |
911 | } |
912 | ||
e56188ac HS |
913 | |
914 | ||
915 | ||
916 | /*********************************************************************/ | |
917 | /* */ | |
918 | /* Support for Wireless Extensions */ | |
919 | /* */ | |
920 | /*********************************************************************/ | |
921 | ||
ffd074fc | 922 | |
00af0157 DW |
923 | #define MAX_CUSTOM_LEN 64 |
924 | ||
69f9032d | 925 | static inline char *lbs_translate_scan(struct lbs_private *priv, |
ccc58057 DM |
926 | struct iw_request_info *info, |
927 | char *start, char *stop, | |
928 | struct bss_descriptor *bss) | |
876c9d3a | 929 | { |
876c9d3a | 930 | struct chan_freq_power *cfp; |
876c9d3a MT |
931 | char *current_val; /* For rates */ |
932 | struct iw_event iwe; /* Temporary buffer */ | |
876c9d3a | 933 | int j; |
f137e054 DW |
934 | #define PERFECT_RSSI ((uint8_t)50) |
935 | #define WORST_RSSI ((uint8_t)0) | |
936 | #define RSSI_DIFF ((uint8_t)(PERFECT_RSSI - WORST_RSSI)) | |
937 | uint8_t rssi; | |
876c9d3a | 938 | |
e56188ac HS |
939 | lbs_deb_enter(LBS_DEB_SCAN); |
940 | ||
aa21c004 | 941 | cfp = lbs_find_cfp_by_band_and_channel(priv, 0, bss->channel); |
fcdb53db DW |
942 | if (!cfp) { |
943 | lbs_deb_scan("Invalid channel number %d\n", bss->channel); | |
e56188ac HS |
944 | start = NULL; |
945 | goto out; | |
2be92196 | 946 | } |
876c9d3a | 947 | |
ffd074fc | 948 | /* First entry *MUST* be the BSSID */ |
fcdb53db DW |
949 | iwe.cmd = SIOCGIWAP; |
950 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
951 | memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN); | |
ccc58057 | 952 | start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_ADDR_LEN); |
fcdb53db DW |
953 | |
954 | /* SSID */ | |
955 | iwe.cmd = SIOCGIWESSID; | |
956 | iwe.u.data.flags = 1; | |
243e84e9 | 957 | iwe.u.data.length = min((uint32_t) bss->ssid_len, (uint32_t) IEEE80211_MAX_SSID_LEN); |
ccc58057 | 958 | start = iwe_stream_add_point(info, start, stop, &iwe, bss->ssid); |
fcdb53db DW |
959 | |
960 | /* Mode */ | |
961 | iwe.cmd = SIOCGIWMODE; | |
962 | iwe.u.mode = bss->mode; | |
ccc58057 | 963 | start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_UINT_LEN); |
fcdb53db DW |
964 | |
965 | /* Frequency */ | |
966 | iwe.cmd = SIOCGIWFREQ; | |
967 | iwe.u.freq.m = (long)cfp->freq * 100000; | |
968 | iwe.u.freq.e = 1; | |
ccc58057 | 969 | start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_FREQ_LEN); |
fcdb53db DW |
970 | |
971 | /* Add quality statistics */ | |
972 | iwe.cmd = IWEVQUAL; | |
973 | iwe.u.qual.updated = IW_QUAL_ALL_UPDATED; | |
974 | iwe.u.qual.level = SCAN_RSSI(bss->rssi); | |
975 | ||
976 | rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE; | |
977 | iwe.u.qual.qual = | |
f137e054 DW |
978 | (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) * |
979 | (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) / | |
980 | (RSSI_DIFF * RSSI_DIFF); | |
fcdb53db DW |
981 | if (iwe.u.qual.qual > 100) |
982 | iwe.u.qual.qual = 100; | |
983 | ||
aa21c004 | 984 | if (priv->NF[TYPE_BEACON][TYPE_NOAVG] == 0) { |
fcdb53db DW |
985 | iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE; |
986 | } else { | |
f137e054 | 987 | iwe.u.qual.noise = CAL_NF(priv->NF[TYPE_BEACON][TYPE_NOAVG]); |
fcdb53db | 988 | } |
80e78ef7 DW |
989 | |
990 | /* Locally created ad-hoc BSSs won't have beacons if this is the | |
991 | * only station in the adhoc network; so get signal strength | |
992 | * from receive statistics. | |
993 | */ | |
f137e054 | 994 | if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate |
aa21c004 | 995 | && !lbs_ssid_cmp(priv->curbssparams.ssid, |
f137e054 DW |
996 | priv->curbssparams.ssid_len, |
997 | bss->ssid, bss->ssid_len)) { | |
80e78ef7 | 998 | int snr, nf; |
aa21c004 DW |
999 | snr = priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; |
1000 | nf = priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; | |
80e78ef7 | 1001 | iwe.u.qual.level = CAL_RSSI(snr, nf); |
fcdb53db | 1002 | } |
ccc58057 | 1003 | start = iwe_stream_add_event(info, start, stop, &iwe, IW_EV_QUAL_LEN); |
876c9d3a | 1004 | |
fcdb53db DW |
1005 | /* Add encryption capability */ |
1006 | iwe.cmd = SIOCGIWENCODE; | |
0c9ca690 | 1007 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) { |
fcdb53db DW |
1008 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; |
1009 | } else { | |
1010 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
1011 | } | |
1012 | iwe.u.data.length = 0; | |
ccc58057 | 1013 | start = iwe_stream_add_point(info, start, stop, &iwe, bss->ssid); |
876c9d3a | 1014 | |
ccc58057 | 1015 | current_val = start + iwe_stream_lcp_len(info); |
876c9d3a | 1016 | |
fcdb53db DW |
1017 | iwe.cmd = SIOCGIWRATE; |
1018 | iwe.u.bitrate.fixed = 0; | |
1019 | iwe.u.bitrate.disabled = 0; | |
1020 | iwe.u.bitrate.value = 0; | |
876c9d3a | 1021 | |
430453fc | 1022 | for (j = 0; j < ARRAY_SIZE(bss->rates) && bss->rates[j]; j++) { |
8c512765 DW |
1023 | /* Bit rate given in 500 kb/s units */ |
1024 | iwe.u.bitrate.value = bss->rates[j] * 500000; | |
ccc58057 DM |
1025 | current_val = iwe_stream_add_value(info, start, current_val, |
1026 | stop, &iwe, IW_EV_PARAM_LEN); | |
fcdb53db | 1027 | } |
f137e054 | 1028 | if ((bss->mode == IW_MODE_ADHOC) && priv->adhoccreate |
aa21c004 | 1029 | && !lbs_ssid_cmp(priv->curbssparams.ssid, |
f137e054 DW |
1030 | priv->curbssparams.ssid_len, |
1031 | bss->ssid, bss->ssid_len)) { | |
fcdb53db | 1032 | iwe.u.bitrate.value = 22 * 500000; |
ccc58057 | 1033 | current_val = iwe_stream_add_value(info, start, current_val, |
f137e054 | 1034 | stop, &iwe, IW_EV_PARAM_LEN); |
fcdb53db DW |
1035 | } |
1036 | /* Check if we added any event */ | |
ccc58057 | 1037 | if ((current_val - start) > iwe_stream_lcp_len(info)) |
fcdb53db DW |
1038 | start = current_val; |
1039 | ||
1040 | memset(&iwe, 0, sizeof(iwe)); | |
1041 | if (bss->wpa_ie_len) { | |
1042 | char buf[MAX_WPA_IE_LEN]; | |
1043 | memcpy(buf, bss->wpa_ie, bss->wpa_ie_len); | |
1044 | iwe.cmd = IWEVGENIE; | |
1045 | iwe.u.data.length = bss->wpa_ie_len; | |
ccc58057 | 1046 | start = iwe_stream_add_point(info, start, stop, &iwe, buf); |
fcdb53db | 1047 | } |
876c9d3a | 1048 | |
fcdb53db DW |
1049 | memset(&iwe, 0, sizeof(iwe)); |
1050 | if (bss->rsn_ie_len) { | |
1051 | char buf[MAX_WPA_IE_LEN]; | |
1052 | memcpy(buf, bss->rsn_ie, bss->rsn_ie_len); | |
1053 | iwe.cmd = IWEVGENIE; | |
1054 | iwe.u.data.length = bss->rsn_ie_len; | |
ccc58057 | 1055 | start = iwe_stream_add_point(info, start, stop, &iwe, buf); |
fcdb53db | 1056 | } |
876c9d3a | 1057 | |
00af0157 DW |
1058 | if (bss->mesh) { |
1059 | char custom[MAX_CUSTOM_LEN]; | |
1060 | char *p = custom; | |
1061 | ||
1062 | iwe.cmd = IWEVCUSTOM; | |
f137e054 | 1063 | p += snprintf(p, MAX_CUSTOM_LEN, "mesh-type: olpc"); |
00af0157 DW |
1064 | iwe.u.data.length = p - custom; |
1065 | if (iwe.u.data.length) | |
ccc58057 DM |
1066 | start = iwe_stream_add_point(info, start, stop, |
1067 | &iwe, custom); | |
00af0157 DW |
1068 | } |
1069 | ||
e56188ac HS |
1070 | out: |
1071 | lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start); | |
fcdb53db DW |
1072 | return start; |
1073 | } | |
876c9d3a | 1074 | |
ffd074fc HS |
1075 | |
1076 | /** | |
1077 | * @brief Handle Scan Network ioctl | |
1078 | * | |
1079 | * @param dev A pointer to net_device structure | |
1080 | * @param info A pointer to iw_request_info structure | |
1081 | * @param vwrq A pointer to iw_param structure | |
1082 | * @param extra A pointer to extra data buf | |
1083 | * | |
1084 | * @return 0 --success, otherwise fail | |
1085 | */ | |
1086 | int lbs_set_scan(struct net_device *dev, struct iw_request_info *info, | |
52933d81 | 1087 | union iwreq_data *wrqu, char *extra) |
ffd074fc | 1088 | { |
9387b7ca | 1089 | DECLARE_SSID_BUF(ssid); |
ab65f649 | 1090 | struct lbs_private *priv = dev->ml_priv; |
52933d81 | 1091 | int ret = 0; |
ffd074fc | 1092 | |
52933d81 | 1093 | lbs_deb_enter(LBS_DEB_WEXT); |
ffd074fc | 1094 | |
d5db2dfa DW |
1095 | if (!priv->radio_on) { |
1096 | ret = -EINVAL; | |
1097 | goto out; | |
1098 | } | |
1099 | ||
52933d81 HS |
1100 | if (!netif_running(dev)) { |
1101 | ret = -ENETDOWN; | |
1102 | goto out; | |
1103 | } | |
ffd074fc HS |
1104 | |
1105 | /* mac80211 does this: | |
1106 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
52933d81 HS |
1107 | if (sdata->type != IEEE80211_IF_TYPE_xxx) { |
1108 | ret = -EOPNOTSUPP; | |
1109 | goto out; | |
1110 | } | |
1111 | */ | |
ffd074fc HS |
1112 | |
1113 | if (wrqu->data.length == sizeof(struct iw_scan_req) && | |
1114 | wrqu->data.flags & IW_SCAN_THIS_ESSID) { | |
52933d81 HS |
1115 | struct iw_scan_req *req = (struct iw_scan_req *)extra; |
1116 | priv->scan_ssid_len = req->essid_len; | |
1117 | memcpy(priv->scan_ssid, req->essid, priv->scan_ssid_len); | |
1118 | lbs_deb_wext("set_scan, essid '%s'\n", | |
9387b7ca | 1119 | print_ssid(ssid, priv->scan_ssid, priv->scan_ssid_len)); |
52933d81 HS |
1120 | } else { |
1121 | priv->scan_ssid_len = 0; | |
ffd074fc | 1122 | } |
ffd074fc HS |
1123 | |
1124 | if (!delayed_work_pending(&priv->scan_work)) | |
1125 | queue_delayed_work(priv->work_thread, &priv->scan_work, | |
f137e054 | 1126 | msecs_to_jiffies(50)); |
ffd074fc | 1127 | /* set marker that currently a scan is taking place */ |
8816edce | 1128 | priv->scan_channel = -1; |
ffd074fc | 1129 | |
aa21c004 | 1130 | if (priv->surpriseremoved) |
52933d81 | 1131 | ret = -EIO; |
ffd074fc | 1132 | |
52933d81 HS |
1133 | out: |
1134 | lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret); | |
1135 | return ret; | |
ffd074fc HS |
1136 | } |
1137 | ||
1138 | ||
fcdb53db | 1139 | /** |
e56188ac | 1140 | * @brief Handle Retrieve scan table ioctl |
fcdb53db DW |
1141 | * |
1142 | * @param dev A pointer to net_device structure | |
1143 | * @param info A pointer to iw_request_info structure | |
1144 | * @param dwrq A pointer to iw_point structure | |
1145 | * @param extra A pointer to extra data buf | |
1146 | * | |
1147 | * @return 0 --success, otherwise fail | |
1148 | */ | |
10078321 | 1149 | int lbs_get_scan(struct net_device *dev, struct iw_request_info *info, |
f137e054 | 1150 | struct iw_point *dwrq, char *extra) |
fcdb53db DW |
1151 | { |
1152 | #define SCAN_ITEM_SIZE 128 | |
ab65f649 | 1153 | struct lbs_private *priv = dev->ml_priv; |
fcdb53db DW |
1154 | int err = 0; |
1155 | char *ev = extra; | |
1156 | char *stop = ev + dwrq->length; | |
f137e054 DW |
1157 | struct bss_descriptor *iter_bss; |
1158 | struct bss_descriptor *safe; | |
876c9d3a | 1159 | |
52933d81 | 1160 | lbs_deb_enter(LBS_DEB_WEXT); |
876c9d3a | 1161 | |
ffd074fc | 1162 | /* iwlist should wait until the current scan is finished */ |
8816edce | 1163 | if (priv->scan_channel) |
ffd074fc HS |
1164 | return -EAGAIN; |
1165 | ||
80e78ef7 | 1166 | /* Update RSSI if current BSS is a locally created ad-hoc BSS */ |
c0bbd576 AK |
1167 | if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate) { |
1168 | err = lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, | |
1169 | CMD_OPTION_WAITFORRSP, 0, NULL); | |
1170 | if (err) | |
1171 | goto out; | |
1172 | } | |
80e78ef7 | 1173 | |
aa21c004 DW |
1174 | mutex_lock(&priv->lock); |
1175 | list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) { | |
f137e054 | 1176 | char *next_ev; |
fcdb53db | 1177 | unsigned long stale_time; |
876c9d3a | 1178 | |
fcdb53db DW |
1179 | if (stop - ev < SCAN_ITEM_SIZE) { |
1180 | err = -E2BIG; | |
1181 | break; | |
876c9d3a | 1182 | } |
876c9d3a | 1183 | |
1e838bf3 LCC |
1184 | /* For mesh device, list only mesh networks */ |
1185 | if (dev == priv->mesh_dev && !iter_bss->mesh) | |
1186 | continue; | |
1187 | ||
fcdb53db DW |
1188 | /* Prune old an old scan result */ |
1189 | stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; | |
1190 | if (time_after(jiffies, stale_time)) { | |
f137e054 | 1191 | list_move_tail(&iter_bss->list, &priv->network_free_list); |
fcdb53db DW |
1192 | clear_bss_descriptor(iter_bss); |
1193 | continue; | |
876c9d3a MT |
1194 | } |
1195 | ||
fcdb53db | 1196 | /* Translate to WE format this entry */ |
ccc58057 | 1197 | next_ev = lbs_translate_scan(priv, info, ev, stop, iter_bss); |
fcdb53db DW |
1198 | if (next_ev == NULL) |
1199 | continue; | |
1200 | ev = next_ev; | |
876c9d3a | 1201 | } |
aa21c004 | 1202 | mutex_unlock(&priv->lock); |
876c9d3a | 1203 | |
fcdb53db | 1204 | dwrq->length = (ev - extra); |
876c9d3a | 1205 | dwrq->flags = 0; |
c0bbd576 | 1206 | out: |
52933d81 | 1207 | lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", err); |
fcdb53db | 1208 | return err; |
876c9d3a MT |
1209 | } |
1210 | ||
e56188ac HS |
1211 | |
1212 | ||
1213 | ||
1214 | /*********************************************************************/ | |
1215 | /* */ | |
1216 | /* Command execution */ | |
1217 | /* */ | |
1218 | /*********************************************************************/ | |
1219 | ||
1220 | ||
876c9d3a MT |
1221 | /** |
1222 | * @brief This function handles the command response of scan | |
1223 | * | |
e56188ac HS |
1224 | * Called from handle_cmd_response() in cmdrespc. |
1225 | * | |
876c9d3a MT |
1226 | * The response buffer for the scan command has the following |
1227 | * memory layout: | |
1228 | * | |
1229 | * .-----------------------------------------------------------. | |
1230 | * | header (4 * sizeof(u16)): Standard command response hdr | | |
1231 | * .-----------------------------------------------------------. | |
1232 | * | bufsize (u16) : sizeof the BSS Description data | | |
1233 | * .-----------------------------------------------------------. | |
1234 | * | NumOfSet (u8) : Number of BSS Descs returned | | |
1235 | * .-----------------------------------------------------------. | |
1236 | * | BSSDescription data (variable, size given in bufsize) | | |
1237 | * .-----------------------------------------------------------. | |
1238 | * | TLV data (variable, size calculated using header->size, | | |
1239 | * | bufsize and sizeof the fixed fields above) | | |
1240 | * .-----------------------------------------------------------. | |
1241 | * | |
69f9032d | 1242 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
1243 | * @param resp A pointer to cmd_ds_command |
1244 | * | |
1245 | * @return 0 or -1 | |
1246 | */ | |
fa62f99c DW |
1247 | static int lbs_ret_80211_scan(struct lbs_private *priv, unsigned long dummy, |
1248 | struct cmd_header *resp) | |
876c9d3a | 1249 | { |
fa62f99c | 1250 | struct cmd_ds_802_11_scan_rsp *scanresp = (void *)resp; |
f137e054 DW |
1251 | struct bss_descriptor *iter_bss; |
1252 | struct bss_descriptor *safe; | |
fa62f99c DW |
1253 | uint8_t *bssinfo; |
1254 | uint16_t scanrespsize; | |
876c9d3a | 1255 | int bytesleft; |
876c9d3a MT |
1256 | int idx; |
1257 | int tlvbufsize; | |
9012b28a | 1258 | int ret; |
876c9d3a | 1259 | |
e56188ac | 1260 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 1261 | |
fcdb53db | 1262 | /* Prune old entries from scan table */ |
aa21c004 | 1263 | list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) { |
fcdb53db DW |
1264 | unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; |
1265 | if (time_before(jiffies, stale_time)) | |
1266 | continue; | |
aa21c004 | 1267 | list_move_tail (&iter_bss->list, &priv->network_free_list); |
fcdb53db DW |
1268 | clear_bss_descriptor(iter_bss); |
1269 | } | |
1270 | ||
fa62f99c DW |
1271 | if (scanresp->nr_sets > MAX_NETWORK_COUNT) { |
1272 | lbs_deb_scan("SCAN_RESP: too many scan results (%d, max %d)\n", | |
1273 | scanresp->nr_sets, MAX_NETWORK_COUNT); | |
9012b28a HS |
1274 | ret = -1; |
1275 | goto done; | |
876c9d3a MT |
1276 | } |
1277 | ||
2c5b9e51 | 1278 | bytesleft = get_unaligned_le16(&scanresp->bssdescriptsize); |
9012b28a | 1279 | lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft); |
876c9d3a | 1280 | |
e7240aca | 1281 | scanrespsize = le16_to_cpu(resp->size); |
fa62f99c | 1282 | lbs_deb_scan("SCAN_RESP: scan results %d\n", scanresp->nr_sets); |
876c9d3a | 1283 | |
fa62f99c | 1284 | bssinfo = scanresp->bssdesc_and_tlvbuffer; |
876c9d3a MT |
1285 | |
1286 | /* The size of the TLV buffer is equal to the entire command response | |
1287 | * size (scanrespsize) minus the fixed fields (sizeof()'s), the | |
1288 | * BSS Descriptions (bssdescriptsize as bytesLef) and the command | |
8ec97cc8 | 1289 | * response header (sizeof(struct cmd_header)) |
876c9d3a | 1290 | */ |
fa62f99c DW |
1291 | tlvbufsize = scanrespsize - (bytesleft + sizeof(scanresp->bssdescriptsize) |
1292 | + sizeof(scanresp->nr_sets) | |
8ec97cc8 | 1293 | + sizeof(struct cmd_header)); |
876c9d3a | 1294 | |
876c9d3a | 1295 | /* |
fa62f99c | 1296 | * Process each scan response returned (scanresp->nr_sets). Save |
876c9d3a MT |
1297 | * the information in the newbssentry and then insert into the |
1298 | * driver scan table either as an update to an existing entry | |
1299 | * or as an addition at the end of the table | |
1300 | */ | |
fa62f99c | 1301 | for (idx = 0; idx < scanresp->nr_sets && bytesleft; idx++) { |
fcdb53db | 1302 | struct bss_descriptor new; |
fa62f99c DW |
1303 | struct bss_descriptor *found = NULL; |
1304 | struct bss_descriptor *oldest = NULL; | |
876c9d3a MT |
1305 | |
1306 | /* Process the data fields and IEs returned for this BSS */ | |
fcdb53db | 1307 | memset(&new, 0, sizeof (struct bss_descriptor)); |
fa62f99c | 1308 | if (lbs_process_bss(&new, &bssinfo, &bytesleft) != 0) { |
fcdb53db DW |
1309 | /* error parsing the scan response, skipped */ |
1310 | lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n"); | |
1311 | continue; | |
1312 | } | |
876c9d3a | 1313 | |
fcdb53db | 1314 | /* Try to find this bss in the scan table */ |
aa21c004 | 1315 | list_for_each_entry (iter_bss, &priv->network_list, list) { |
fcdb53db DW |
1316 | if (is_same_network(iter_bss, &new)) { |
1317 | found = iter_bss; | |
1318 | break; | |
876c9d3a MT |
1319 | } |
1320 | ||
fcdb53db DW |
1321 | if ((oldest == NULL) || |
1322 | (iter_bss->last_scanned < oldest->last_scanned)) | |
1323 | oldest = iter_bss; | |
1324 | } | |
876c9d3a | 1325 | |
fcdb53db DW |
1326 | if (found) { |
1327 | /* found, clear it */ | |
1328 | clear_bss_descriptor(found); | |
aa21c004 | 1329 | } else if (!list_empty(&priv->network_free_list)) { |
fcdb53db | 1330 | /* Pull one from the free list */ |
aa21c004 | 1331 | found = list_entry(priv->network_free_list.next, |
fcdb53db | 1332 | struct bss_descriptor, list); |
aa21c004 | 1333 | list_move_tail(&found->list, &priv->network_list); |
fcdb53db DW |
1334 | } else if (oldest) { |
1335 | /* If there are no more slots, expire the oldest */ | |
1336 | found = oldest; | |
1337 | clear_bss_descriptor(found); | |
aa21c004 | 1338 | list_move_tail(&found->list, &priv->network_list); |
876c9d3a | 1339 | } else { |
fcdb53db DW |
1340 | continue; |
1341 | } | |
876c9d3a | 1342 | |
e174961c | 1343 | lbs_deb_scan("SCAN_RESP: BSSID %pM\n", new.bssid); |
fcdb53db | 1344 | |
fcdb53db DW |
1345 | /* Copy the locally created newbssentry to the scan table */ |
1346 | memcpy(found, &new, offsetof(struct bss_descriptor, list)); | |
1347 | } | |
876c9d3a | 1348 | |
9012b28a | 1349 | ret = 0; |
876c9d3a | 1350 | |
9012b28a HS |
1351 | done: |
1352 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
1353 | return ret; | |
876c9d3a | 1354 | } |