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" |
876c9d3a MT |
23 | |
24 | //! Approximate amount of data needed to pass a scan result back to iwlist | |
25 | #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \ | |
26 | + IW_ESSID_MAX_SIZE \ | |
27 | + IW_EV_UINT_LEN \ | |
28 | + IW_EV_FREQ_LEN \ | |
29 | + IW_EV_QUAL_LEN \ | |
30 | + IW_ESSID_MAX_SIZE \ | |
31 | + IW_EV_PARAM_LEN \ | |
32 | + 40) /* 40 for WPAIE */ | |
33 | ||
34 | //! Memory needed to store a max sized channel List TLV for a firmware scan | |
35 | #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \ | |
36 | + (MRVDRV_MAX_CHANNELS_PER_SCAN \ | |
37 | * sizeof(struct chanscanparamset))) | |
38 | ||
39 | //! Memory needed to store a max number/size SSID TLV for a firmware scan | |
40 | #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset)) | |
41 | ||
10078321 HS |
42 | //! Maximum memory needed for a lbs_scan_cmd_config with all TLVs at max |
43 | #define MAX_SCAN_CFG_ALLOC (sizeof(struct lbs_scan_cmd_config) \ | |
876c9d3a MT |
44 | + CHAN_TLV_MAX_SIZE \ |
45 | + SSID_TLV_MAX_SIZE) | |
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 | ||
123e0e04 DW |
64 | static const u8 zeromac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; |
65 | static const u8 bcastmac[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; | |
eb8f7330 | 66 | |
e56188ac HS |
67 | |
68 | ||
69 | ||
70 | /*********************************************************************/ | |
71 | /* */ | |
72 | /* Misc helper functions */ | |
73 | /* */ | |
74 | /*********************************************************************/ | |
75 | ||
fcdb53db DW |
76 | static inline void clear_bss_descriptor (struct bss_descriptor * bss) |
77 | { | |
78 | /* Don't blow away ->list, just BSS data */ | |
79 | memset(bss, 0, offsetof(struct bss_descriptor, list)); | |
80 | } | |
81 | ||
ffd074fc HS |
82 | /** |
83 | * @brief Compare two SSIDs | |
84 | * | |
85 | * @param ssid1 A pointer to ssid to compare | |
86 | * @param ssid2 A pointer to ssid to compare | |
87 | * | |
88 | * @return 0: ssid is same, otherwise is different | |
89 | */ | |
90 | int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len) | |
91 | { | |
92 | if (ssid1_len != ssid2_len) | |
93 | return -1; | |
94 | ||
95 | return memcmp(ssid1, ssid2, ssid1_len); | |
96 | } | |
97 | ||
10078321 | 98 | static inline int match_bss_no_security(struct lbs_802_11_security *secinfo, |
fcdb53db DW |
99 | struct bss_descriptor * match_bss) |
100 | { | |
101 | if ( !secinfo->wep_enabled | |
102 | && !secinfo->WPAenabled | |
103 | && !secinfo->WPA2enabled | |
ab617971 DW |
104 | && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC |
105 | && match_bss->rsn_ie[0] != MFIE_TYPE_RSN | |
0c9ca690 | 106 | && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
fcdb53db DW |
107 | return 1; |
108 | } | |
109 | return 0; | |
110 | } | |
111 | ||
10078321 | 112 | static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo, |
fcdb53db DW |
113 | struct bss_descriptor * match_bss) |
114 | { | |
115 | if ( secinfo->wep_enabled | |
116 | && !secinfo->WPAenabled | |
117 | && !secinfo->WPA2enabled | |
0c9ca690 | 118 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
fcdb53db DW |
119 | return 1; |
120 | } | |
121 | return 0; | |
122 | } | |
123 | ||
10078321 | 124 | static inline int match_bss_wpa(struct lbs_802_11_security *secinfo, |
fcdb53db DW |
125 | struct bss_descriptor * match_bss) |
126 | { | |
127 | if ( !secinfo->wep_enabled | |
128 | && secinfo->WPAenabled | |
ab617971 | 129 | && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC) |
fcdb53db | 130 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G |
0c9ca690 DW |
131 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
132 | */ | |
fcdb53db DW |
133 | ) { |
134 | return 1; | |
135 | } | |
136 | return 0; | |
137 | } | |
138 | ||
10078321 | 139 | static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo, |
fcdb53db DW |
140 | struct bss_descriptor * match_bss) |
141 | { | |
142 | if ( !secinfo->wep_enabled | |
fcdb53db | 143 | && secinfo->WPA2enabled |
ab617971 | 144 | && (match_bss->rsn_ie[0] == MFIE_TYPE_RSN) |
fcdb53db | 145 | /* privacy bit may NOT be set in some APs like LinkSys WRT54G |
0c9ca690 DW |
146 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
147 | */ | |
fcdb53db DW |
148 | ) { |
149 | return 1; | |
150 | } | |
151 | return 0; | |
152 | } | |
153 | ||
10078321 | 154 | static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo, |
fcdb53db DW |
155 | struct bss_descriptor * match_bss) |
156 | { | |
157 | if ( !secinfo->wep_enabled | |
158 | && !secinfo->WPAenabled | |
159 | && !secinfo->WPA2enabled | |
ab617971 DW |
160 | && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC) |
161 | && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN) | |
0c9ca690 | 162 | && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) { |
fcdb53db DW |
163 | return 1; |
164 | } | |
165 | return 0; | |
166 | } | |
876c9d3a | 167 | |
ffd074fc HS |
168 | static inline int is_same_network(struct bss_descriptor *src, |
169 | struct bss_descriptor *dst) | |
170 | { | |
171 | /* A network is only a duplicate if the channel, BSSID, and ESSID | |
172 | * all match. We treat all <hidden> with the same BSSID and channel | |
173 | * as one network */ | |
174 | return ((src->ssid_len == dst->ssid_len) && | |
175 | (src->channel == dst->channel) && | |
176 | !compare_ether_addr(src->bssid, dst->bssid) && | |
177 | !memcmp(src->ssid, dst->ssid, src->ssid_len)); | |
178 | } | |
179 | ||
876c9d3a MT |
180 | /** |
181 | * @brief Check if a scanned network compatible with the driver settings | |
182 | * | |
183 | * WEP WPA WPA2 ad-hoc encrypt Network | |
184 | * enabled enabled enabled AES mode privacy WPA WPA2 Compatible | |
185 | * 0 0 0 0 NONE 0 0 0 yes No security | |
186 | * 1 0 0 0 NONE 1 0 0 yes Static WEP | |
187 | * 0 1 0 0 x 1x 1 x yes WPA | |
188 | * 0 0 1 0 x 1x x 1 yes WPA2 | |
189 | * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES | |
190 | * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP | |
191 | * | |
192 | * | |
aa21c004 | 193 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
194 | * @param index Index in scantable to check against current driver settings |
195 | * @param mode Network mode: Infrastructure or IBSS | |
196 | * | |
197 | * @return Index in scantable, or error code if negative | |
198 | */ | |
aa21c004 | 199 | static int is_network_compatible(struct lbs_private *priv, |
fcdb53db | 200 | struct bss_descriptor * bss, u8 mode) |
876c9d3a | 201 | { |
fcdb53db DW |
202 | int matched = 0; |
203 | ||
e56188ac | 204 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 205 | |
fcdb53db DW |
206 | if (bss->mode != mode) |
207 | goto done; | |
876c9d3a | 208 | |
aa21c004 | 209 | if ((matched = match_bss_no_security(&priv->secinfo, bss))) { |
fcdb53db | 210 | goto done; |
aa21c004 | 211 | } else if ((matched = match_bss_static_wep(&priv->secinfo, bss))) { |
fcdb53db | 212 | goto done; |
aa21c004 | 213 | } else if ((matched = match_bss_wpa(&priv->secinfo, bss))) { |
fcdb53db | 214 | lbs_deb_scan( |
ffd074fc HS |
215 | "is_network_compatible() WPA: wpa_ie 0x%x " |
216 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " | |
217 | "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], | |
aa21c004 DW |
218 | priv->secinfo.wep_enabled ? "e" : "d", |
219 | priv->secinfo.WPAenabled ? "e" : "d", | |
220 | priv->secinfo.WPA2enabled ? "e" : "d", | |
0c9ca690 | 221 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
fcdb53db | 222 | goto done; |
aa21c004 | 223 | } else if ((matched = match_bss_wpa2(&priv->secinfo, bss))) { |
fcdb53db | 224 | lbs_deb_scan( |
ffd074fc HS |
225 | "is_network_compatible() WPA2: wpa_ie 0x%x " |
226 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s " | |
227 | "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0], | |
aa21c004 DW |
228 | priv->secinfo.wep_enabled ? "e" : "d", |
229 | priv->secinfo.WPAenabled ? "e" : "d", | |
230 | priv->secinfo.WPA2enabled ? "e" : "d", | |
0c9ca690 | 231 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
fcdb53db | 232 | goto done; |
aa21c004 | 233 | } else if ((matched = match_bss_dynamic_wep(&priv->secinfo, bss))) { |
fcdb53db DW |
234 | lbs_deb_scan( |
235 | "is_network_compatible() dynamic WEP: " | |
ffd074fc | 236 | "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n", |
0c9ca690 DW |
237 | bss->wpa_ie[0], bss->rsn_ie[0], |
238 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); | |
9012b28a | 239 | goto done; |
876c9d3a MT |
240 | } |
241 | ||
fcdb53db DW |
242 | /* bss security settings don't match those configured on card */ |
243 | lbs_deb_scan( | |
ffd074fc HS |
244 | "is_network_compatible() FAILED: wpa_ie 0x%x " |
245 | "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n", | |
fcdb53db | 246 | bss->wpa_ie[0], bss->rsn_ie[0], |
aa21c004 DW |
247 | priv->secinfo.wep_enabled ? "e" : "d", |
248 | priv->secinfo.WPAenabled ? "e" : "d", | |
249 | priv->secinfo.WPA2enabled ? "e" : "d", | |
0c9ca690 | 250 | (bss->capability & WLAN_CAPABILITY_PRIVACY)); |
9012b28a HS |
251 | |
252 | done: | |
e56188ac | 253 | lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched); |
fcdb53db | 254 | return matched; |
876c9d3a MT |
255 | } |
256 | ||
e56188ac HS |
257 | |
258 | ||
259 | ||
260 | /*********************************************************************/ | |
261 | /* */ | |
262 | /* Main scanning support */ | |
263 | /* */ | |
264 | /*********************************************************************/ | |
265 | ||
ffd074fc HS |
266 | void lbs_scan_worker(struct work_struct *work) |
267 | { | |
268 | struct lbs_private *priv = | |
269 | container_of(work, struct lbs_private, scan_work.work); | |
270 | ||
271 | lbs_deb_enter(LBS_DEB_SCAN); | |
272 | lbs_scan_networks(priv, NULL, 0); | |
273 | lbs_deb_leave(LBS_DEB_SCAN); | |
274 | } | |
275 | ||
e56188ac | 276 | |
876c9d3a MT |
277 | /** |
278 | * @brief Create a channel list for the driver to scan based on region info | |
279 | * | |
10078321 | 280 | * Only used from lbs_scan_setup_scan_config() |
e56188ac | 281 | * |
876c9d3a MT |
282 | * Use the driver region/band information to construct a comprehensive list |
283 | * of channels to scan. This routine is used for any scan that is not | |
284 | * provided a specific channel list to scan. | |
285 | * | |
69f9032d | 286 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
287 | * @param scanchanlist Output parameter: resulting channel list to scan |
288 | * @param filteredscan Flag indicating whether or not a BSSID or SSID filter | |
289 | * is being sent in the command to firmware. Used to | |
290 | * increase the number of channels sent in a scan | |
291 | * command and to disable the firmware channel scan | |
292 | * filter. | |
293 | * | |
294 | * @return void | |
295 | */ | |
ffd074fc | 296 | static int lbs_scan_create_channel_list(struct lbs_private *priv, |
876c9d3a MT |
297 | struct chanscanparamset * scanchanlist, |
298 | u8 filteredscan) | |
299 | { | |
300 | ||
876c9d3a MT |
301 | struct region_channel *scanregion; |
302 | struct chan_freq_power *cfp; | |
303 | int rgnidx; | |
304 | int chanidx; | |
305 | int nextchan; | |
306 | u8 scantype; | |
307 | ||
308 | chanidx = 0; | |
309 | ||
310 | /* Set the default scan type to the user specified type, will later | |
311 | * be changed to passive on a per channel basis if restricted by | |
312 | * regulatory requirements (11d or 11h) | |
313 | */ | |
4f2fdaaf | 314 | scantype = CMD_SCAN_TYPE_ACTIVE; |
876c9d3a | 315 | |
aa21c004 DW |
316 | for (rgnidx = 0; rgnidx < ARRAY_SIZE(priv->region_channel); rgnidx++) { |
317 | if (priv->enable11d && | |
318 | (priv->connect_status != LBS_CONNECTED) && | |
319 | (priv->mesh_connect_status != LBS_CONNECTED)) { | |
876c9d3a | 320 | /* Scan all the supported chan for the first scan */ |
aa21c004 | 321 | if (!priv->universal_channel[rgnidx].valid) |
876c9d3a | 322 | continue; |
aa21c004 | 323 | scanregion = &priv->universal_channel[rgnidx]; |
876c9d3a MT |
324 | |
325 | /* clear the parsed_region_chan for the first scan */ | |
aa21c004 DW |
326 | memset(&priv->parsed_region_chan, 0x00, |
327 | sizeof(priv->parsed_region_chan)); | |
876c9d3a | 328 | } else { |
aa21c004 | 329 | if (!priv->region_channel[rgnidx].valid) |
876c9d3a | 330 | continue; |
aa21c004 | 331 | scanregion = &priv->region_channel[rgnidx]; |
876c9d3a MT |
332 | } |
333 | ||
334 | for (nextchan = 0; | |
335 | nextchan < scanregion->nrcfp; nextchan++, chanidx++) { | |
336 | ||
337 | cfp = scanregion->CFP + nextchan; | |
338 | ||
aa21c004 | 339 | if (priv->enable11d) { |
876c9d3a | 340 | scantype = |
10078321 | 341 | lbs_get_scan_type_11d(cfp->channel, |
aa21c004 | 342 | &priv-> |
876c9d3a MT |
343 | parsed_region_chan); |
344 | } | |
345 | ||
346 | switch (scanregion->band) { | |
347 | case BAND_B: | |
348 | case BAND_G: | |
349 | default: | |
350 | scanchanlist[chanidx].radiotype = | |
0aef64d7 | 351 | CMD_SCAN_RADIO_TYPE_BG; |
876c9d3a MT |
352 | break; |
353 | } | |
354 | ||
0aef64d7 | 355 | if (scantype == CMD_SCAN_TYPE_PASSIVE) { |
876c9d3a | 356 | scanchanlist[chanidx].maxscantime = |
981f187b | 357 | cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME); |
876c9d3a MT |
358 | scanchanlist[chanidx].chanscanmode.passivescan = |
359 | 1; | |
360 | } else { | |
361 | scanchanlist[chanidx].maxscantime = | |
981f187b | 362 | cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME); |
876c9d3a MT |
363 | scanchanlist[chanidx].chanscanmode.passivescan = |
364 | 0; | |
365 | } | |
366 | ||
367 | scanchanlist[chanidx].channumber = cfp->channel; | |
368 | ||
369 | if (filteredscan) { | |
370 | scanchanlist[chanidx].chanscanmode. | |
371 | disablechanfilt = 1; | |
372 | } | |
373 | } | |
374 | } | |
ffd074fc | 375 | return chanidx; |
876c9d3a MT |
376 | } |
377 | ||
2afc0c5d | 378 | |
ffd074fc HS |
379 | /* |
380 | * Add SSID TLV of the form: | |
381 | * | |
382 | * TLV-ID SSID 00 00 | |
383 | * length 06 00 | |
384 | * ssid 4d 4e 54 45 53 54 | |
385 | */ | |
386 | static int lbs_scan_add_ssid_tlv(u8 *tlv, | |
387 | const struct lbs_ioctl_user_scan_cfg *user_cfg) | |
2afc0c5d | 388 | { |
ffd074fc HS |
389 | struct mrvlietypes_ssidparamset *ssid_tlv = |
390 | (struct mrvlietypes_ssidparamset *)tlv; | |
391 | ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID); | |
392 | ssid_tlv->header.len = cpu_to_le16(user_cfg->ssid_len); | |
393 | memcpy(ssid_tlv->ssid, user_cfg->ssid, user_cfg->ssid_len); | |
394 | return sizeof(ssid_tlv->header) + user_cfg->ssid_len; | |
2afc0c5d DW |
395 | } |
396 | ||
397 | ||
ffd074fc HS |
398 | /* |
399 | * Add CHANLIST TLV of the form | |
876c9d3a | 400 | * |
ffd074fc HS |
401 | * TLV-ID CHANLIST 01 01 |
402 | * length 5b 00 | |
403 | * channel 1 00 01 00 00 00 64 00 | |
404 | * radio type 00 | |
405 | * channel 01 | |
406 | * scan type 00 | |
407 | * min scan time 00 00 | |
408 | * max scan time 64 00 | |
409 | * channel 2 00 02 00 00 00 64 00 | |
410 | * channel 3 00 03 00 00 00 64 00 | |
411 | * channel 4 00 04 00 00 00 64 00 | |
412 | * channel 5 00 05 00 00 00 64 00 | |
413 | * channel 6 00 06 00 00 00 64 00 | |
414 | * channel 7 00 07 00 00 00 64 00 | |
415 | * channel 8 00 08 00 00 00 64 00 | |
416 | * channel 9 00 09 00 00 00 64 00 | |
417 | * channel 10 00 0a 00 00 00 64 00 | |
418 | * channel 11 00 0b 00 00 00 64 00 | |
419 | * channel 12 00 0c 00 00 00 64 00 | |
420 | * channel 13 00 0d 00 00 00 64 00 | |
876c9d3a | 421 | * |
876c9d3a | 422 | */ |
ffd074fc HS |
423 | static int lbs_scan_add_chanlist_tlv(u8 *tlv, |
424 | struct chanscanparamset *chan_list, | |
425 | int chan_count) | |
876c9d3a | 426 | { |
ffd074fc HS |
427 | size_t size = sizeof(struct chanscanparamset) * chan_count; |
428 | struct mrvlietypes_chanlistparamset *chan_tlv = | |
429 | (struct mrvlietypes_chanlistparamset *) tlv; | |
430 | ||
431 | chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); | |
432 | memcpy(chan_tlv->chanscanparam, chan_list, size); | |
433 | chan_tlv->header.len = cpu_to_le16(size); | |
434 | return sizeof(chan_tlv->header) + size; | |
876c9d3a MT |
435 | } |
436 | ||
ffd074fc HS |
437 | |
438 | /* | |
439 | * Add RATES TLV of the form | |
876c9d3a | 440 | * |
ffd074fc HS |
441 | * TLV-ID RATES 01 00 |
442 | * length 0e 00 | |
443 | * rates 82 84 8b 96 0c 12 18 24 30 48 60 6c | |
876c9d3a | 444 | * |
ffd074fc HS |
445 | * The rates are in lbs_bg_rates[], but for the 802.11b |
446 | * rates the high bit isn't set. | |
876c9d3a | 447 | */ |
ffd074fc | 448 | static int lbs_scan_add_rates_tlv(u8 *tlv) |
876c9d3a | 449 | { |
ffd074fc HS |
450 | int i; |
451 | struct mrvlietypes_ratesparamset *rate_tlv = | |
452 | (struct mrvlietypes_ratesparamset *) tlv; | |
453 | ||
454 | rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES); | |
455 | tlv += sizeof(rate_tlv->header); | |
456 | for (i = 0; i < MAX_RATES; i++) { | |
457 | *tlv = lbs_bg_rates[i]; | |
458 | if (*tlv == 0) | |
459 | break; | |
460 | /* This code makes sure that the 802.11b rates (1 MBit/s, 2 | |
461 | MBit/s, 5.5 MBit/s and 11 MBit/s get's the high bit set. | |
462 | Note that the values are MBit/s * 2, to mark them as | |
463 | basic rates so that the firmware likes it better */ | |
464 | if (*tlv == 0x02 || *tlv == 0x04 || | |
465 | *tlv == 0x0b || *tlv == 0x16) | |
466 | *tlv |= 0x80; | |
467 | tlv++; | |
2afc0c5d | 468 | } |
ffd074fc HS |
469 | rate_tlv->header.len = cpu_to_le16(i); |
470 | return sizeof(rate_tlv->header) + i; | |
876c9d3a MT |
471 | } |
472 | ||
ffd074fc | 473 | |
e56188ac | 474 | /* |
ffd074fc HS |
475 | * Generate the CMD_802_11_SCAN command with the proper tlv |
476 | * for a bunch of channels. | |
477 | */ | |
478 | static int lbs_do_scan(struct lbs_private *priv, | |
479 | u8 bsstype, | |
480 | struct chanscanparamset *chan_list, | |
481 | int chan_count, | |
482 | const struct lbs_ioctl_user_scan_cfg *user_cfg) | |
eb8f7330 | 483 | { |
ffd074fc HS |
484 | int ret = -ENOMEM; |
485 | struct lbs_scan_cmd_config *scan_cmd; | |
486 | u8 *tlv; /* pointer into our current, growing TLV storage area */ | |
eb8f7330 | 487 | |
ffd074fc HS |
488 | lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, " |
489 | "chan_count %d", | |
490 | bsstype, chan_list[0].channumber, chan_count); | |
e56188ac | 491 | |
ffd074fc HS |
492 | /* create the fixed part for scan command */ |
493 | scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL); | |
494 | if (scan_cmd == NULL) | |
e56188ac | 495 | goto out; |
ffd074fc HS |
496 | tlv = scan_cmd->tlvbuffer; |
497 | if (user_cfg) | |
498 | memcpy(scan_cmd->bssid, user_cfg->bssid, ETH_ALEN); | |
499 | scan_cmd->bsstype = bsstype; | |
500 | ||
501 | /* add TLVs */ | |
502 | if (user_cfg && user_cfg->ssid_len) | |
503 | tlv += lbs_scan_add_ssid_tlv(tlv, user_cfg); | |
504 | if (chan_list && chan_count) | |
505 | tlv += lbs_scan_add_chanlist_tlv(tlv, chan_list, chan_count); | |
506 | tlv += lbs_scan_add_rates_tlv(tlv); | |
507 | ||
508 | /* This is the final data we are about to send */ | |
509 | scan_cmd->tlvbufferlen = tlv - scan_cmd->tlvbuffer; | |
510 | lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd, 1+6); | |
511 | lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer, | |
512 | scan_cmd->tlvbufferlen); | |
513 | ||
514 | ret = lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, 0, | |
515 | CMD_OPTION_WAITFORRSP, 0, scan_cmd); | |
e56188ac | 516 | out: |
ffd074fc HS |
517 | kfree(scan_cmd); |
518 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
519 | return ret; | |
eb8f7330 DW |
520 | } |
521 | ||
522 | ||
876c9d3a MT |
523 | /** |
524 | * @brief Internal function used to start a scan based on an input config | |
525 | * | |
e56188ac HS |
526 | * Also used from debugfs |
527 | * | |
876c9d3a MT |
528 | * Use the input user scan configuration information when provided in |
529 | * order to send the appropriate scan commands to firmware to populate or | |
530 | * update the internal driver scan table | |
531 | * | |
69f9032d | 532 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
533 | * @param puserscanin Pointer to the input configuration for the requested |
534 | * scan. | |
535 | * | |
536 | * @return 0 or < 0 if error | |
537 | */ | |
69f9032d | 538 | int lbs_scan_networks(struct lbs_private *priv, |
ffd074fc | 539 | const struct lbs_ioctl_user_scan_cfg *user_cfg, |
2afc0c5d | 540 | int full_scan) |
876c9d3a | 541 | { |
ffd074fc HS |
542 | int ret = -ENOMEM; |
543 | struct chanscanparamset *chan_list; | |
544 | struct chanscanparamset *curr_chans; | |
545 | int chan_count; | |
546 | u8 bsstype = CMD_BSS_TYPE_ANY; | |
547 | int numchannels = MRVDRV_CHANNELS_PER_SCAN_CMD; | |
548 | int filteredscan = 0; | |
549 | union iwreq_data wrqu; | |
f8f55108 | 550 | #ifdef CONFIG_LIBERTAS_DEBUG |
ffd074fc | 551 | struct bss_descriptor *iter; |
f8f55108 | 552 | int i = 0; |
0795af57 | 553 | DECLARE_MAC_BUF(mac); |
f8f55108 | 554 | #endif |
876c9d3a | 555 | |
ffd074fc HS |
556 | lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", |
557 | full_scan); | |
2afc0c5d DW |
558 | |
559 | /* Cancel any partial outstanding partial scans if this scan | |
560 | * is a full scan. | |
561 | */ | |
562 | if (full_scan && delayed_work_pending(&priv->scan_work)) | |
563 | cancel_delayed_work(&priv->scan_work); | |
876c9d3a | 564 | |
ffd074fc HS |
565 | /* Determine same scan parameters */ |
566 | if (user_cfg) { | |
567 | if (user_cfg->bsstype) | |
568 | bsstype = user_cfg->bsstype; | |
569 | if (compare_ether_addr(user_cfg->bssid, &zeromac[0]) != 0) { | |
570 | numchannels = MRVDRV_MAX_CHANNELS_PER_SCAN; | |
571 | filteredscan = 1; | |
572 | } | |
876c9d3a | 573 | } |
ffd074fc HS |
574 | lbs_deb_scan("numchannels %d, bsstype %d, " |
575 | "filteredscan %d\n", | |
576 | numchannels, bsstype, filteredscan); | |
876c9d3a | 577 | |
ffd074fc HS |
578 | /* Create list of channels to scan */ |
579 | chan_list = kzalloc(sizeof(struct chanscanparamset) * | |
580 | LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL); | |
581 | if (!chan_list) { | |
582 | lbs_pr_alert("SCAN: chan_list empty\n"); | |
876c9d3a MT |
583 | goto out; |
584 | } | |
585 | ||
ffd074fc HS |
586 | /* We want to scan all channels */ |
587 | chan_count = lbs_scan_create_channel_list(priv, chan_list, | |
588 | filteredscan); | |
876c9d3a | 589 | |
ffd074fc HS |
590 | netif_stop_queue(priv->dev); |
591 | netif_carrier_off(priv->dev); | |
592 | if (priv->mesh_dev) { | |
a27b9f96 DW |
593 | netif_stop_queue(priv->mesh_dev); |
594 | netif_carrier_off(priv->mesh_dev); | |
876c9d3a MT |
595 | } |
596 | ||
ffd074fc HS |
597 | /* Prepare to continue an interrupted scan */ |
598 | lbs_deb_scan("chan_count %d, last_scanned_channel %d\n", | |
a27b9f96 | 599 | chan_count, priv->last_scanned_channel); |
ffd074fc HS |
600 | curr_chans = chan_list; |
601 | /* advance channel list by already-scanned-channels */ | |
aa21c004 DW |
602 | if (priv->last_scanned_channel > 0) { |
603 | curr_chans += priv->last_scanned_channel; | |
604 | chan_count -= priv->last_scanned_channel; | |
ffd074fc HS |
605 | } |
606 | ||
607 | /* Send scan command(s) | |
608 | * numchannels contains the number of channels we should maximally scan | |
609 | * chan_count is the total number of channels to scan | |
610 | */ | |
611 | ||
612 | while (chan_count) { | |
613 | int to_scan = min(numchannels, chan_count); | |
614 | lbs_deb_scan("scanning %d of %d channels\n", | |
615 | to_scan, chan_count); | |
616 | ret = lbs_do_scan(priv, bsstype, curr_chans, | |
617 | to_scan, user_cfg); | |
618 | if (ret) { | |
619 | lbs_pr_err("SCAN_CMD failed\n"); | |
620 | goto out2; | |
621 | } | |
622 | curr_chans += to_scan; | |
623 | chan_count -= to_scan; | |
624 | ||
625 | /* somehow schedule the next part of the scan */ | |
626 | if (chan_count && | |
627 | !full_scan && | |
aa21c004 | 628 | !priv->surpriseremoved) { |
ffd074fc | 629 | /* -1 marks just that we're currently scanning */ |
aa21c004 DW |
630 | if (priv->last_scanned_channel < 0) |
631 | priv->last_scanned_channel = to_scan; | |
ffd074fc | 632 | else |
aa21c004 | 633 | priv->last_scanned_channel += to_scan; |
ffd074fc HS |
634 | cancel_delayed_work(&priv->scan_work); |
635 | queue_delayed_work(priv->work_thread, &priv->scan_work, | |
636 | msecs_to_jiffies(300)); | |
637 | /* skip over GIWSCAN event */ | |
638 | goto out; | |
639 | } | |
640 | ||
641 | } | |
642 | memset(&wrqu, 0, sizeof(union iwreq_data)); | |
643 | wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL); | |
876c9d3a | 644 | |
f8f55108 DW |
645 | #ifdef CONFIG_LIBERTAS_DEBUG |
646 | /* Dump the scan table */ | |
aa21c004 | 647 | mutex_lock(&priv->lock); |
ffd074fc | 648 | lbs_deb_scan("scan table:\n"); |
aa21c004 | 649 | list_for_each_entry(iter, &priv->network_list, list) |
ffd074fc HS |
650 | lbs_deb_scan("%02d: BSSID %s, RSSI %d, SSID '%s'\n", |
651 | i++, print_mac(mac, iter->bssid), (s32) iter->rssi, | |
652 | escape_essid(iter->ssid, iter->ssid_len)); | |
aa21c004 | 653 | mutex_unlock(&priv->lock); |
f8f55108 | 654 | #endif |
876c9d3a | 655 | |
ffd074fc | 656 | out2: |
aa21c004 | 657 | priv->last_scanned_channel = 0; |
ffd074fc HS |
658 | |
659 | out: | |
aa21c004 | 660 | if (priv->connect_status == LBS_CONNECTED) { |
634b8f49 | 661 | netif_carrier_on(priv->dev); |
a27b9f96 DW |
662 | if (!priv->tx_pending_len) |
663 | netif_wake_queue(priv->dev); | |
01d77d8d | 664 | } |
aa21c004 | 665 | if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) { |
01d77d8d | 666 | netif_carrier_on(priv->mesh_dev); |
a27b9f96 DW |
667 | if (!priv->tx_pending_len) |
668 | netif_wake_queue(priv->mesh_dev); | |
876c9d3a | 669 | } |
ffd074fc | 670 | kfree(chan_list); |
876c9d3a | 671 | |
9012b28a | 672 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
876c9d3a MT |
673 | return ret; |
674 | } | |
675 | ||
ffd074fc HS |
676 | |
677 | ||
678 | ||
679 | /*********************************************************************/ | |
680 | /* */ | |
681 | /* Result interpretation */ | |
682 | /* */ | |
683 | /*********************************************************************/ | |
684 | ||
876c9d3a MT |
685 | /** |
686 | * @brief Interpret a BSS scan response returned from the firmware | |
687 | * | |
688 | * Parse the various fixed fields and IEs passed back for a a BSS probe | |
ffd074fc HS |
689 | * response or beacon from the scan command. Record information as needed |
690 | * in the scan table struct bss_descriptor for that entry. | |
876c9d3a | 691 | * |
fcdb53db | 692 | * @param bss Output parameter: Pointer to the BSS Entry |
876c9d3a MT |
693 | * |
694 | * @return 0 or -1 | |
695 | */ | |
10078321 | 696 | static int lbs_process_bss(struct bss_descriptor *bss, |
fcdb53db | 697 | u8 ** pbeaconinfo, int *bytesleft) |
876c9d3a | 698 | { |
876c9d3a MT |
699 | struct ieeetypes_fhparamset *pFH; |
700 | struct ieeetypes_dsparamset *pDS; | |
701 | struct ieeetypes_cfparamset *pCF; | |
702 | struct ieeetypes_ibssparamset *pibss; | |
0795af57 | 703 | DECLARE_MAC_BUF(mac); |
876c9d3a | 704 | struct ieeetypes_countryinfoset *pcountryinfo; |
8c512765 DW |
705 | u8 *pos, *end, *p; |
706 | u8 n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0; | |
707 | u16 beaconsize = 0; | |
708 | int ret; | |
876c9d3a | 709 | |
e56188ac | 710 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 711 | |
876c9d3a MT |
712 | if (*bytesleft >= sizeof(beaconsize)) { |
713 | /* Extract & convert beacon size from the command buffer */ | |
e7240aca | 714 | beaconsize = le16_to_cpu(get_unaligned((__le16 *)*pbeaconinfo)); |
876c9d3a MT |
715 | *bytesleft -= sizeof(beaconsize); |
716 | *pbeaconinfo += sizeof(beaconsize); | |
717 | } | |
718 | ||
719 | if (beaconsize == 0 || beaconsize > *bytesleft) { | |
876c9d3a MT |
720 | *pbeaconinfo += *bytesleft; |
721 | *bytesleft = 0; | |
e56188ac HS |
722 | ret = -1; |
723 | goto done; | |
876c9d3a MT |
724 | } |
725 | ||
726 | /* Initialize the current working beacon pointer for this BSS iteration */ | |
ab617971 DW |
727 | pos = *pbeaconinfo; |
728 | end = pos + beaconsize; | |
876c9d3a MT |
729 | |
730 | /* Advance the return beacon pointer past the current beacon */ | |
731 | *pbeaconinfo += beaconsize; | |
732 | *bytesleft -= beaconsize; | |
733 | ||
ab617971 | 734 | memcpy(bss->bssid, pos, ETH_ALEN); |
ffd074fc | 735 | lbs_deb_scan("process_bss: BSSID %s\n", print_mac(mac, bss->bssid)); |
ab617971 | 736 | pos += ETH_ALEN; |
876c9d3a | 737 | |
ab617971 | 738 | if ((end - pos) < 12) { |
fcdb53db | 739 | lbs_deb_scan("process_bss: Not enough bytes left\n"); |
e56188ac HS |
740 | ret = -1; |
741 | goto done; | |
876c9d3a MT |
742 | } |
743 | ||
744 | /* | |
745 | * next 4 fields are RSSI, time stamp, beacon interval, | |
746 | * and capability information | |
747 | */ | |
748 | ||
749 | /* RSSI is 1 byte long */ | |
ab617971 | 750 | bss->rssi = *pos; |
ffd074fc | 751 | lbs_deb_scan("process_bss: RSSI %d\n", *pos); |
ab617971 | 752 | pos++; |
876c9d3a MT |
753 | |
754 | /* time stamp is 8 bytes long */ | |
ab617971 | 755 | pos += 8; |
876c9d3a MT |
756 | |
757 | /* beacon interval is 2 bytes long */ | |
ab617971 DW |
758 | bss->beaconperiod = le16_to_cpup((void *) pos); |
759 | pos += 2; | |
876c9d3a MT |
760 | |
761 | /* capability information is 2 bytes long */ | |
ab617971 | 762 | bss->capability = le16_to_cpup((void *) pos); |
ffd074fc | 763 | lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability); |
ab617971 | 764 | pos += 2; |
876c9d3a | 765 | |
0c9ca690 | 766 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) |
ffd074fc | 767 | lbs_deb_scan("process_bss: WEP enabled\n"); |
0c9ca690 DW |
768 | if (bss->capability & WLAN_CAPABILITY_IBSS) |
769 | bss->mode = IW_MODE_ADHOC; | |
770 | else | |
771 | bss->mode = IW_MODE_INFRA; | |
772 | ||
876c9d3a | 773 | /* rest of the current buffer are IE's */ |
ffd074fc | 774 | lbs_deb_scan("process_bss: IE len %zd\n", end - pos); |
ece56191 | 775 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos); |
876c9d3a | 776 | |
876c9d3a | 777 | /* process variable IE */ |
ab617971 DW |
778 | while (pos <= end - 2) { |
779 | struct ieee80211_info_element * elem = | |
780 | (struct ieee80211_info_element *) pos; | |
876c9d3a | 781 | |
ab617971 | 782 | if (pos + elem->len > end) { |
fcdb53db | 783 | lbs_deb_scan("process_bss: error in processing IE, " |
876c9d3a | 784 | "bytes left < IE length\n"); |
ab617971 | 785 | break; |
876c9d3a MT |
786 | } |
787 | ||
ab617971 DW |
788 | switch (elem->id) { |
789 | case MFIE_TYPE_SSID: | |
790 | bss->ssid_len = elem->len; | |
791 | memcpy(bss->ssid, elem->data, elem->len); | |
ffd074fc | 792 | lbs_deb_scan("got SSID IE: '%s', len %u\n", |
d8efea25 DW |
793 | escape_essid(bss->ssid, bss->ssid_len), |
794 | bss->ssid_len); | |
876c9d3a MT |
795 | break; |
796 | ||
ab617971 | 797 | case MFIE_TYPE_RATES: |
8c512765 DW |
798 | n_basic_rates = min_t(u8, MAX_RATES, elem->len); |
799 | memcpy(bss->rates, elem->data, n_basic_rates); | |
800 | got_basic_rates = 1; | |
ffd074fc | 801 | lbs_deb_scan("got RATES IE\n"); |
876c9d3a MT |
802 | break; |
803 | ||
ab617971 DW |
804 | case MFIE_TYPE_FH_SET: |
805 | pFH = (struct ieeetypes_fhparamset *) pos; | |
fcdb53db | 806 | memmove(&bss->phyparamset.fhparamset, pFH, |
876c9d3a | 807 | sizeof(struct ieeetypes_fhparamset)); |
ffd074fc | 808 | lbs_deb_scan("got FH IE\n"); |
876c9d3a MT |
809 | break; |
810 | ||
ab617971 DW |
811 | case MFIE_TYPE_DS_SET: |
812 | pDS = (struct ieeetypes_dsparamset *) pos; | |
fcdb53db DW |
813 | bss->channel = pDS->currentchan; |
814 | memcpy(&bss->phyparamset.dsparamset, pDS, | |
876c9d3a | 815 | sizeof(struct ieeetypes_dsparamset)); |
ffd074fc | 816 | lbs_deb_scan("got DS IE, channel %d\n", bss->channel); |
876c9d3a MT |
817 | break; |
818 | ||
ab617971 DW |
819 | case MFIE_TYPE_CF_SET: |
820 | pCF = (struct ieeetypes_cfparamset *) pos; | |
fcdb53db | 821 | memcpy(&bss->ssparamset.cfparamset, pCF, |
876c9d3a | 822 | sizeof(struct ieeetypes_cfparamset)); |
ffd074fc | 823 | lbs_deb_scan("got CF IE\n"); |
876c9d3a MT |
824 | break; |
825 | ||
ab617971 DW |
826 | case MFIE_TYPE_IBSS_SET: |
827 | pibss = (struct ieeetypes_ibssparamset *) pos; | |
e7240aca | 828 | bss->atimwindow = le16_to_cpu(pibss->atimwindow); |
fcdb53db | 829 | memmove(&bss->ssparamset.ibssparamset, pibss, |
876c9d3a | 830 | sizeof(struct ieeetypes_ibssparamset)); |
ffd074fc | 831 | lbs_deb_scan("got IBSS IE\n"); |
876c9d3a MT |
832 | break; |
833 | ||
ab617971 DW |
834 | case MFIE_TYPE_COUNTRY: |
835 | pcountryinfo = (struct ieeetypes_countryinfoset *) pos; | |
ffd074fc | 836 | lbs_deb_scan("got COUNTRY IE\n"); |
fcdb53db | 837 | if (pcountryinfo->len < sizeof(pcountryinfo->countrycode) |
876c9d3a | 838 | || pcountryinfo->len > 254) { |
fcdb53db | 839 | lbs_deb_scan("process_bss: 11D- Err " |
ffd074fc | 840 | "CountryInfo len %d, min %zd, max 254\n", |
876c9d3a MT |
841 | pcountryinfo->len, |
842 | sizeof(pcountryinfo->countrycode)); | |
9012b28a HS |
843 | ret = -1; |
844 | goto done; | |
876c9d3a MT |
845 | } |
846 | ||
fcdb53db | 847 | memcpy(&bss->countryinfo, |
876c9d3a | 848 | pcountryinfo, pcountryinfo->len + 2); |
ece56191 | 849 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: 11d countryinfo", |
876c9d3a MT |
850 | (u8 *) pcountryinfo, |
851 | (u32) (pcountryinfo->len + 2)); | |
852 | break; | |
853 | ||
ab617971 DW |
854 | case MFIE_TYPE_RATES_EX: |
855 | /* only process extended supported rate if data rate is | |
856 | * already found. Data rate IE should come before | |
876c9d3a MT |
857 | * extended supported rate IE |
858 | */ | |
ffd074fc HS |
859 | lbs_deb_scan("got RATESEX IE\n"); |
860 | if (!got_basic_rates) { | |
861 | lbs_deb_scan("... but ignoring it\n"); | |
ab617971 | 862 | break; |
ffd074fc | 863 | } |
876c9d3a | 864 | |
8c512765 DW |
865 | n_ex_rates = elem->len; |
866 | if (n_basic_rates + n_ex_rates > MAX_RATES) | |
867 | n_ex_rates = MAX_RATES - n_basic_rates; | |
876c9d3a | 868 | |
8c512765 DW |
869 | p = bss->rates + n_basic_rates; |
870 | memcpy(p, elem->data, n_ex_rates); | |
876c9d3a | 871 | break; |
ab617971 DW |
872 | |
873 | case MFIE_TYPE_GENERIC: | |
874 | if (elem->len >= 4 && | |
875 | elem->data[0] == 0x00 && | |
876 | elem->data[1] == 0x50 && | |
877 | elem->data[2] == 0xf2 && | |
878 | elem->data[3] == 0x01) { | |
879 | bss->wpa_ie_len = min(elem->len + 2, | |
880 | MAX_WPA_IE_LEN); | |
881 | memcpy(bss->wpa_ie, elem, bss->wpa_ie_len); | |
ffd074fc HS |
882 | lbs_deb_scan("got WPA IE\n"); |
883 | lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie, | |
ab617971 | 884 | elem->len); |
1e838bf3 LCC |
885 | } else if (elem->len >= MARVELL_MESH_IE_LENGTH && |
886 | elem->data[0] == 0x00 && | |
887 | elem->data[1] == 0x50 && | |
888 | elem->data[2] == 0x43 && | |
889 | elem->data[3] == 0x04) { | |
ffd074fc | 890 | lbs_deb_scan("got mesh IE\n"); |
1e838bf3 | 891 | bss->mesh = 1; |
ffd074fc HS |
892 | } else { |
893 | lbs_deb_scan("got generiec IE: " | |
894 | "%02x:%02x:%02x:%02x, len %d\n", | |
895 | elem->data[0], elem->data[1], | |
896 | elem->data[2], elem->data[3], | |
897 | elem->len); | |
ab617971 | 898 | } |
876c9d3a | 899 | break; |
ab617971 DW |
900 | |
901 | case MFIE_TYPE_RSN: | |
ffd074fc | 902 | lbs_deb_scan("got RSN IE\n"); |
ab617971 DW |
903 | bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN); |
904 | memcpy(bss->rsn_ie, elem, bss->rsn_ie_len); | |
ffd074fc HS |
905 | lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", |
906 | bss->rsn_ie, elem->len); | |
876c9d3a MT |
907 | break; |
908 | ||
ab617971 | 909 | default: |
ffd074fc HS |
910 | lbs_deb_scan("got IE 0x%04x, len %d\n", |
911 | elem->id, elem->len); | |
876c9d3a MT |
912 | break; |
913 | } | |
914 | ||
ab617971 DW |
915 | pos += elem->len + 2; |
916 | } | |
fcdb53db DW |
917 | |
918 | /* Timestamp */ | |
919 | bss->last_scanned = jiffies; | |
10078321 | 920 | lbs_unset_basic_rate_flags(bss->rates, sizeof(bss->rates)); |
fcdb53db | 921 | |
9012b28a | 922 | ret = 0; |
876c9d3a | 923 | |
9012b28a HS |
924 | done: |
925 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
926 | return ret; | |
876c9d3a MT |
927 | } |
928 | ||
876c9d3a MT |
929 | /** |
930 | * @brief This function finds a specific compatible BSSID in the scan list | |
931 | * | |
e56188ac HS |
932 | * Used in association code |
933 | * | |
aa21c004 | 934 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
935 | * @param bssid BSSID to find in the scan list |
936 | * @param mode Network mode: Infrastructure or IBSS | |
937 | * | |
938 | * @return index in BSSID list, or error return code (< 0) | |
939 | */ | |
aa21c004 | 940 | struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv, |
fcdb53db | 941 | u8 * bssid, u8 mode) |
876c9d3a | 942 | { |
fcdb53db DW |
943 | struct bss_descriptor * iter_bss; |
944 | struct bss_descriptor * found_bss = NULL; | |
876c9d3a | 945 | |
e56188ac HS |
946 | lbs_deb_enter(LBS_DEB_SCAN); |
947 | ||
876c9d3a | 948 | if (!bssid) |
e56188ac | 949 | goto out; |
876c9d3a | 950 | |
ece56191 | 951 | lbs_deb_hex(LBS_DEB_SCAN, "looking for", |
fcdb53db | 952 | bssid, ETH_ALEN); |
876c9d3a | 953 | |
fcdb53db DW |
954 | /* Look through the scan table for a compatible match. The loop will |
955 | * continue past a matched bssid that is not compatible in case there | |
956 | * is an AP with multiple SSIDs assigned to the same BSSID | |
876c9d3a | 957 | */ |
aa21c004 DW |
958 | mutex_lock(&priv->lock); |
959 | list_for_each_entry (iter_bss, &priv->network_list, list) { | |
3cf20931 | 960 | if (compare_ether_addr(iter_bss->bssid, bssid)) |
fcdb53db DW |
961 | continue; /* bssid doesn't match */ |
962 | switch (mode) { | |
963 | case IW_MODE_INFRA: | |
964 | case IW_MODE_ADHOC: | |
aa21c004 | 965 | if (!is_network_compatible(priv, iter_bss, mode)) |
876c9d3a | 966 | break; |
fcdb53db DW |
967 | found_bss = iter_bss; |
968 | break; | |
969 | default: | |
970 | found_bss = iter_bss; | |
971 | break; | |
876c9d3a MT |
972 | } |
973 | } | |
aa21c004 | 974 | mutex_unlock(&priv->lock); |
876c9d3a | 975 | |
e56188ac HS |
976 | out: |
977 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); | |
fcdb53db | 978 | return found_bss; |
876c9d3a MT |
979 | } |
980 | ||
981 | /** | |
982 | * @brief This function finds ssid in ssid list. | |
983 | * | |
e56188ac HS |
984 | * Used in association code |
985 | * | |
aa21c004 | 986 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
987 | * @param ssid SSID to find in the list |
988 | * @param bssid BSSID to qualify the SSID selection (if provided) | |
989 | * @param mode Network mode: Infrastructure or IBSS | |
990 | * | |
991 | * @return index in BSSID list | |
992 | */ | |
aa21c004 | 993 | struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv, |
d8efea25 | 994 | u8 *ssid, u8 ssid_len, u8 * bssid, u8 mode, |
aeea0ab4 | 995 | int channel) |
876c9d3a | 996 | { |
876c9d3a | 997 | u8 bestrssi = 0; |
fcdb53db DW |
998 | struct bss_descriptor * iter_bss = NULL; |
999 | struct bss_descriptor * found_bss = NULL; | |
1000 | struct bss_descriptor * tmp_oldest = NULL; | |
876c9d3a | 1001 | |
e56188ac HS |
1002 | lbs_deb_enter(LBS_DEB_SCAN); |
1003 | ||
aa21c004 | 1004 | mutex_lock(&priv->lock); |
fcdb53db | 1005 | |
aa21c004 | 1006 | list_for_each_entry (iter_bss, &priv->network_list, list) { |
fcdb53db DW |
1007 | if ( !tmp_oldest |
1008 | || (iter_bss->last_scanned < tmp_oldest->last_scanned)) | |
1009 | tmp_oldest = iter_bss; | |
1010 | ||
10078321 | 1011 | if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len, |
d8efea25 | 1012 | ssid, ssid_len) != 0) |
fcdb53db | 1013 | continue; /* ssid doesn't match */ |
3cf20931 | 1014 | if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0) |
fcdb53db | 1015 | continue; /* bssid doesn't match */ |
aeea0ab4 DW |
1016 | if ((channel > 0) && (iter_bss->channel != channel)) |
1017 | continue; /* channel doesn't match */ | |
fcdb53db DW |
1018 | |
1019 | switch (mode) { | |
1020 | case IW_MODE_INFRA: | |
1021 | case IW_MODE_ADHOC: | |
aa21c004 | 1022 | if (!is_network_compatible(priv, iter_bss, mode)) |
876c9d3a | 1023 | break; |
fcdb53db DW |
1024 | |
1025 | if (bssid) { | |
1026 | /* Found requested BSSID */ | |
1027 | found_bss = iter_bss; | |
1028 | goto out; | |
1029 | } | |
1030 | ||
1031 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { | |
1032 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1033 | found_bss = iter_bss; | |
1034 | } | |
1035 | break; | |
1036 | case IW_MODE_AUTO: | |
1037 | default: | |
1038 | if (SCAN_RSSI(iter_bss->rssi) > bestrssi) { | |
1039 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1040 | found_bss = iter_bss; | |
876c9d3a | 1041 | } |
fcdb53db | 1042 | break; |
876c9d3a MT |
1043 | } |
1044 | } | |
1045 | ||
fcdb53db | 1046 | out: |
aa21c004 | 1047 | mutex_unlock(&priv->lock); |
e56188ac | 1048 | lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss); |
fcdb53db | 1049 | return found_bss; |
876c9d3a MT |
1050 | } |
1051 | ||
1052 | /** | |
1053 | * @brief This function finds the best SSID in the Scan List | |
1054 | * | |
1055 | * Search the scan table for the best SSID that also matches the current | |
1056 | * adapter network preference (infrastructure or adhoc) | |
1057 | * | |
aa21c004 | 1058 | * @param priv A pointer to struct lbs_private |
876c9d3a MT |
1059 | * |
1060 | * @return index in BSSID list | |
1061 | */ | |
69f9032d | 1062 | static struct bss_descriptor *lbs_find_best_ssid_in_list( |
aa21c004 | 1063 | struct lbs_private *priv, |
69f9032d | 1064 | u8 mode) |
876c9d3a | 1065 | { |
876c9d3a | 1066 | u8 bestrssi = 0; |
fcdb53db DW |
1067 | struct bss_descriptor * iter_bss; |
1068 | struct bss_descriptor * best_bss = NULL; | |
876c9d3a | 1069 | |
e56188ac HS |
1070 | lbs_deb_enter(LBS_DEB_SCAN); |
1071 | ||
aa21c004 | 1072 | mutex_lock(&priv->lock); |
876c9d3a | 1073 | |
aa21c004 | 1074 | list_for_each_entry (iter_bss, &priv->network_list, list) { |
876c9d3a | 1075 | switch (mode) { |
0dc5a290 DW |
1076 | case IW_MODE_INFRA: |
1077 | case IW_MODE_ADHOC: | |
aa21c004 | 1078 | if (!is_network_compatible(priv, iter_bss, mode)) |
fcdb53db DW |
1079 | break; |
1080 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) | |
1081 | break; | |
1082 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1083 | best_bss = iter_bss; | |
876c9d3a | 1084 | break; |
0dc5a290 | 1085 | case IW_MODE_AUTO: |
876c9d3a | 1086 | default: |
fcdb53db DW |
1087 | if (SCAN_RSSI(iter_bss->rssi) <= bestrssi) |
1088 | break; | |
1089 | bestrssi = SCAN_RSSI(iter_bss->rssi); | |
1090 | best_bss = iter_bss; | |
876c9d3a MT |
1091 | break; |
1092 | } | |
1093 | } | |
1094 | ||
aa21c004 | 1095 | mutex_unlock(&priv->lock); |
e56188ac | 1096 | lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss); |
fcdb53db | 1097 | return best_bss; |
876c9d3a MT |
1098 | } |
1099 | ||
1100 | /** | |
1101 | * @brief Find the AP with specific ssid in the scan list | |
1102 | * | |
e56188ac HS |
1103 | * Used from association worker. |
1104 | * | |
69f9032d | 1105 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
1106 | * @param pSSID A pointer to AP's ssid |
1107 | * | |
1108 | * @return 0--success, otherwise--fail | |
1109 | */ | |
69f9032d | 1110 | int lbs_find_best_network_ssid(struct lbs_private *priv, |
d8efea25 | 1111 | u8 *out_ssid, u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode) |
876c9d3a | 1112 | { |
fcdb53db DW |
1113 | int ret = -1; |
1114 | struct bss_descriptor * found; | |
876c9d3a | 1115 | |
e56188ac | 1116 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 1117 | |
10078321 | 1118 | lbs_scan_networks(priv, NULL, 1); |
aa21c004 | 1119 | if (priv->surpriseremoved) |
e56188ac | 1120 | goto out; |
876c9d3a | 1121 | |
aa21c004 | 1122 | found = lbs_find_best_ssid_in_list(priv, preferred_mode); |
d8efea25 DW |
1123 | if (found && (found->ssid_len > 0)) { |
1124 | memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE); | |
1125 | *out_ssid_len = found->ssid_len; | |
fcdb53db DW |
1126 | *out_mode = found->mode; |
1127 | ret = 0; | |
876c9d3a MT |
1128 | } |
1129 | ||
e56188ac | 1130 | out: |
9012b28a | 1131 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
876c9d3a MT |
1132 | return ret; |
1133 | } | |
1134 | ||
e56188ac | 1135 | |
876c9d3a MT |
1136 | /** |
1137 | * @brief Send a scan command for all available channels filtered on a spec | |
1138 | * | |
e56188ac HS |
1139 | * Used in association code and from debugfs |
1140 | * | |
69f9032d | 1141 | * @param priv A pointer to struct lbs_private structure |
e56188ac HS |
1142 | * @param ssid A pointer to the SSID to scan for |
1143 | * @param ssid_len Length of the SSID | |
1144 | * @param clear_ssid Should existing scan results with this SSID | |
1145 | * be cleared? | |
876c9d3a MT |
1146 | * |
1147 | * @return 0-success, otherwise fail | |
1148 | */ | |
69f9032d | 1149 | int lbs_send_specific_ssid_scan(struct lbs_private *priv, |
d8efea25 | 1150 | u8 *ssid, u8 ssid_len, u8 clear_ssid) |
876c9d3a | 1151 | { |
10078321 | 1152 | struct lbs_ioctl_user_scan_cfg scancfg; |
eb8f7330 | 1153 | int ret = 0; |
876c9d3a | 1154 | |
e56188ac HS |
1155 | lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s', clear %d", |
1156 | escape_essid(ssid, ssid_len), clear_ssid); | |
876c9d3a | 1157 | |
d8efea25 | 1158 | if (!ssid_len) |
eb8f7330 | 1159 | goto out; |
876c9d3a MT |
1160 | |
1161 | memset(&scancfg, 0x00, sizeof(scancfg)); | |
d8efea25 DW |
1162 | memcpy(scancfg.ssid, ssid, ssid_len); |
1163 | scancfg.ssid_len = ssid_len; | |
eb8f7330 | 1164 | scancfg.clear_ssid = clear_ssid; |
876c9d3a | 1165 | |
10078321 | 1166 | lbs_scan_networks(priv, &scancfg, 1); |
aa21c004 | 1167 | if (priv->surpriseremoved) { |
e56188ac HS |
1168 | ret = -1; |
1169 | goto out; | |
1170 | } | |
876c9d3a | 1171 | |
eb8f7330 | 1172 | out: |
e56188ac | 1173 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); |
eb8f7330 | 1174 | return ret; |
876c9d3a MT |
1175 | } |
1176 | ||
e56188ac HS |
1177 | |
1178 | ||
1179 | ||
1180 | /*********************************************************************/ | |
1181 | /* */ | |
1182 | /* Support for Wireless Extensions */ | |
1183 | /* */ | |
1184 | /*********************************************************************/ | |
1185 | ||
ffd074fc | 1186 | |
00af0157 DW |
1187 | #define MAX_CUSTOM_LEN 64 |
1188 | ||
69f9032d | 1189 | static inline char *lbs_translate_scan(struct lbs_private *priv, |
fcdb53db DW |
1190 | char *start, char *stop, |
1191 | struct bss_descriptor *bss) | |
876c9d3a | 1192 | { |
876c9d3a | 1193 | struct chan_freq_power *cfp; |
876c9d3a MT |
1194 | char *current_val; /* For rates */ |
1195 | struct iw_event iwe; /* Temporary buffer */ | |
876c9d3a | 1196 | int j; |
876c9d3a MT |
1197 | #define PERFECT_RSSI ((u8)50) |
1198 | #define WORST_RSSI ((u8)0) | |
1199 | #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI)) | |
1200 | u8 rssi; | |
1201 | ||
e56188ac HS |
1202 | lbs_deb_enter(LBS_DEB_SCAN); |
1203 | ||
aa21c004 | 1204 | cfp = lbs_find_cfp_by_band_and_channel(priv, 0, bss->channel); |
fcdb53db DW |
1205 | if (!cfp) { |
1206 | lbs_deb_scan("Invalid channel number %d\n", bss->channel); | |
e56188ac HS |
1207 | start = NULL; |
1208 | goto out; | |
2be92196 | 1209 | } |
876c9d3a | 1210 | |
ffd074fc | 1211 | /* First entry *MUST* be the BSSID */ |
fcdb53db DW |
1212 | iwe.cmd = SIOCGIWAP; |
1213 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
1214 | memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN); | |
1215 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN); | |
1216 | ||
1217 | /* SSID */ | |
1218 | iwe.cmd = SIOCGIWESSID; | |
1219 | iwe.u.data.flags = 1; | |
d8efea25 DW |
1220 | iwe.u.data.length = min((u32) bss->ssid_len, (u32) IW_ESSID_MAX_SIZE); |
1221 | start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); | |
fcdb53db DW |
1222 | |
1223 | /* Mode */ | |
1224 | iwe.cmd = SIOCGIWMODE; | |
1225 | iwe.u.mode = bss->mode; | |
1226 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN); | |
1227 | ||
1228 | /* Frequency */ | |
1229 | iwe.cmd = SIOCGIWFREQ; | |
1230 | iwe.u.freq.m = (long)cfp->freq * 100000; | |
1231 | iwe.u.freq.e = 1; | |
1232 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN); | |
1233 | ||
1234 | /* Add quality statistics */ | |
1235 | iwe.cmd = IWEVQUAL; | |
1236 | iwe.u.qual.updated = IW_QUAL_ALL_UPDATED; | |
1237 | iwe.u.qual.level = SCAN_RSSI(bss->rssi); | |
1238 | ||
1239 | rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE; | |
1240 | iwe.u.qual.qual = | |
1241 | (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) * | |
1242 | (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) / | |
1243 | (RSSI_DIFF * RSSI_DIFF); | |
1244 | if (iwe.u.qual.qual > 100) | |
1245 | iwe.u.qual.qual = 100; | |
1246 | ||
aa21c004 | 1247 | if (priv->NF[TYPE_BEACON][TYPE_NOAVG] == 0) { |
fcdb53db DW |
1248 | iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE; |
1249 | } else { | |
1250 | iwe.u.qual.noise = | |
aa21c004 | 1251 | CAL_NF(priv->NF[TYPE_BEACON][TYPE_NOAVG]); |
fcdb53db | 1252 | } |
80e78ef7 DW |
1253 | |
1254 | /* Locally created ad-hoc BSSs won't have beacons if this is the | |
1255 | * only station in the adhoc network; so get signal strength | |
1256 | * from receive statistics. | |
1257 | */ | |
aa21c004 DW |
1258 | if ((priv->mode == IW_MODE_ADHOC) |
1259 | && priv->adhoccreate | |
1260 | && !lbs_ssid_cmp(priv->curbssparams.ssid, | |
1261 | priv->curbssparams.ssid_len, | |
d8efea25 | 1262 | bss->ssid, bss->ssid_len)) { |
80e78ef7 | 1263 | int snr, nf; |
aa21c004 DW |
1264 | snr = priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; |
1265 | nf = priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE; | |
80e78ef7 | 1266 | iwe.u.qual.level = CAL_RSSI(snr, nf); |
fcdb53db DW |
1267 | } |
1268 | start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN); | |
876c9d3a | 1269 | |
fcdb53db DW |
1270 | /* Add encryption capability */ |
1271 | iwe.cmd = SIOCGIWENCODE; | |
0c9ca690 | 1272 | if (bss->capability & WLAN_CAPABILITY_PRIVACY) { |
fcdb53db DW |
1273 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; |
1274 | } else { | |
1275 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
1276 | } | |
1277 | iwe.u.data.length = 0; | |
d8efea25 | 1278 | start = iwe_stream_add_point(start, stop, &iwe, bss->ssid); |
876c9d3a | 1279 | |
fcdb53db | 1280 | current_val = start + IW_EV_LCP_LEN; |
876c9d3a | 1281 | |
fcdb53db DW |
1282 | iwe.cmd = SIOCGIWRATE; |
1283 | iwe.u.bitrate.fixed = 0; | |
1284 | iwe.u.bitrate.disabled = 0; | |
1285 | iwe.u.bitrate.value = 0; | |
876c9d3a | 1286 | |
8c512765 DW |
1287 | for (j = 0; bss->rates[j] && (j < sizeof(bss->rates)); j++) { |
1288 | /* Bit rate given in 500 kb/s units */ | |
1289 | iwe.u.bitrate.value = bss->rates[j] * 500000; | |
fcdb53db DW |
1290 | current_val = iwe_stream_add_value(start, current_val, |
1291 | stop, &iwe, IW_EV_PARAM_LEN); | |
1292 | } | |
1293 | if ((bss->mode == IW_MODE_ADHOC) | |
aa21c004 DW |
1294 | && !lbs_ssid_cmp(priv->curbssparams.ssid, |
1295 | priv->curbssparams.ssid_len, | |
d8efea25 | 1296 | bss->ssid, bss->ssid_len) |
aa21c004 | 1297 | && priv->adhoccreate) { |
fcdb53db DW |
1298 | iwe.u.bitrate.value = 22 * 500000; |
1299 | current_val = iwe_stream_add_value(start, current_val, | |
1300 | stop, &iwe, IW_EV_PARAM_LEN); | |
1301 | } | |
1302 | /* Check if we added any event */ | |
1303 | if((current_val - start) > IW_EV_LCP_LEN) | |
1304 | start = current_val; | |
1305 | ||
1306 | memset(&iwe, 0, sizeof(iwe)); | |
1307 | if (bss->wpa_ie_len) { | |
1308 | char buf[MAX_WPA_IE_LEN]; | |
1309 | memcpy(buf, bss->wpa_ie, bss->wpa_ie_len); | |
1310 | iwe.cmd = IWEVGENIE; | |
1311 | iwe.u.data.length = bss->wpa_ie_len; | |
1312 | start = iwe_stream_add_point(start, stop, &iwe, buf); | |
1313 | } | |
876c9d3a | 1314 | |
fcdb53db DW |
1315 | memset(&iwe, 0, sizeof(iwe)); |
1316 | if (bss->rsn_ie_len) { | |
1317 | char buf[MAX_WPA_IE_LEN]; | |
1318 | memcpy(buf, bss->rsn_ie, bss->rsn_ie_len); | |
1319 | iwe.cmd = IWEVGENIE; | |
1320 | iwe.u.data.length = bss->rsn_ie_len; | |
1321 | start = iwe_stream_add_point(start, stop, &iwe, buf); | |
1322 | } | |
876c9d3a | 1323 | |
00af0157 DW |
1324 | if (bss->mesh) { |
1325 | char custom[MAX_CUSTOM_LEN]; | |
1326 | char *p = custom; | |
1327 | ||
1328 | iwe.cmd = IWEVCUSTOM; | |
1329 | p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), | |
1330 | "mesh-type: olpc"); | |
1331 | iwe.u.data.length = p - custom; | |
1332 | if (iwe.u.data.length) | |
1333 | start = iwe_stream_add_point(start, stop, &iwe, custom); | |
1334 | } | |
1335 | ||
e56188ac HS |
1336 | out: |
1337 | lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start); | |
fcdb53db DW |
1338 | return start; |
1339 | } | |
876c9d3a | 1340 | |
ffd074fc HS |
1341 | |
1342 | /** | |
1343 | * @brief Handle Scan Network ioctl | |
1344 | * | |
1345 | * @param dev A pointer to net_device structure | |
1346 | * @param info A pointer to iw_request_info structure | |
1347 | * @param vwrq A pointer to iw_param structure | |
1348 | * @param extra A pointer to extra data buf | |
1349 | * | |
1350 | * @return 0 --success, otherwise fail | |
1351 | */ | |
1352 | int lbs_set_scan(struct net_device *dev, struct iw_request_info *info, | |
1353 | struct iw_param *wrqu, char *extra) | |
1354 | { | |
1355 | struct lbs_private *priv = dev->priv; | |
ffd074fc HS |
1356 | |
1357 | lbs_deb_enter(LBS_DEB_SCAN); | |
1358 | ||
1359 | if (!netif_running(dev)) | |
1360 | return -ENETDOWN; | |
1361 | ||
1362 | /* mac80211 does this: | |
1363 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1364 | if (sdata->type != IEEE80211_IF_TYPE_xxx) | |
1365 | return -EOPNOTSUPP; | |
1366 | ||
1367 | if (wrqu->data.length == sizeof(struct iw_scan_req) && | |
1368 | wrqu->data.flags & IW_SCAN_THIS_ESSID) { | |
1369 | req = (struct iw_scan_req *)extra; | |
1370 | ssid = req->essid; | |
1371 | ssid_len = req->essid_len; | |
1372 | } | |
1373 | */ | |
1374 | ||
1375 | if (!delayed_work_pending(&priv->scan_work)) | |
1376 | queue_delayed_work(priv->work_thread, &priv->scan_work, | |
1377 | msecs_to_jiffies(50)); | |
1378 | /* set marker that currently a scan is taking place */ | |
aa21c004 | 1379 | priv->last_scanned_channel = -1; |
ffd074fc | 1380 | |
aa21c004 | 1381 | if (priv->surpriseremoved) |
ffd074fc HS |
1382 | return -EIO; |
1383 | ||
1384 | lbs_deb_leave(LBS_DEB_SCAN); | |
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | ||
fcdb53db | 1389 | /** |
e56188ac | 1390 | * @brief Handle Retrieve scan table ioctl |
fcdb53db DW |
1391 | * |
1392 | * @param dev A pointer to net_device structure | |
1393 | * @param info A pointer to iw_request_info structure | |
1394 | * @param dwrq A pointer to iw_point structure | |
1395 | * @param extra A pointer to extra data buf | |
1396 | * | |
1397 | * @return 0 --success, otherwise fail | |
1398 | */ | |
10078321 | 1399 | int lbs_get_scan(struct net_device *dev, struct iw_request_info *info, |
fcdb53db DW |
1400 | struct iw_point *dwrq, char *extra) |
1401 | { | |
1402 | #define SCAN_ITEM_SIZE 128 | |
69f9032d | 1403 | struct lbs_private *priv = dev->priv; |
fcdb53db DW |
1404 | int err = 0; |
1405 | char *ev = extra; | |
1406 | char *stop = ev + dwrq->length; | |
1407 | struct bss_descriptor * iter_bss; | |
1408 | struct bss_descriptor * safe; | |
876c9d3a | 1409 | |
e56188ac | 1410 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 1411 | |
ffd074fc | 1412 | /* iwlist should wait until the current scan is finished */ |
aa21c004 | 1413 | if (priv->last_scanned_channel) |
ffd074fc HS |
1414 | return -EAGAIN; |
1415 | ||
80e78ef7 | 1416 | /* Update RSSI if current BSS is a locally created ad-hoc BSS */ |
aa21c004 | 1417 | if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate) { |
10078321 | 1418 | lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0, |
0aef64d7 | 1419 | CMD_OPTION_WAITFORRSP, 0, NULL); |
80e78ef7 DW |
1420 | } |
1421 | ||
aa21c004 DW |
1422 | mutex_lock(&priv->lock); |
1423 | list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) { | |
fcdb53db DW |
1424 | char * next_ev; |
1425 | unsigned long stale_time; | |
876c9d3a | 1426 | |
fcdb53db DW |
1427 | if (stop - ev < SCAN_ITEM_SIZE) { |
1428 | err = -E2BIG; | |
1429 | break; | |
876c9d3a | 1430 | } |
876c9d3a | 1431 | |
1e838bf3 LCC |
1432 | /* For mesh device, list only mesh networks */ |
1433 | if (dev == priv->mesh_dev && !iter_bss->mesh) | |
1434 | continue; | |
1435 | ||
fcdb53db DW |
1436 | /* Prune old an old scan result */ |
1437 | stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; | |
1438 | if (time_after(jiffies, stale_time)) { | |
1439 | list_move_tail (&iter_bss->list, | |
aa21c004 | 1440 | &priv->network_free_list); |
fcdb53db DW |
1441 | clear_bss_descriptor(iter_bss); |
1442 | continue; | |
876c9d3a MT |
1443 | } |
1444 | ||
fcdb53db | 1445 | /* Translate to WE format this entry */ |
10078321 | 1446 | next_ev = lbs_translate_scan(priv, ev, stop, iter_bss); |
fcdb53db DW |
1447 | if (next_ev == NULL) |
1448 | continue; | |
1449 | ev = next_ev; | |
876c9d3a | 1450 | } |
aa21c004 | 1451 | mutex_unlock(&priv->lock); |
876c9d3a | 1452 | |
fcdb53db | 1453 | dwrq->length = (ev - extra); |
876c9d3a MT |
1454 | dwrq->flags = 0; |
1455 | ||
e56188ac | 1456 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", err); |
fcdb53db | 1457 | return err; |
876c9d3a MT |
1458 | } |
1459 | ||
e56188ac HS |
1460 | |
1461 | ||
1462 | ||
1463 | /*********************************************************************/ | |
1464 | /* */ | |
1465 | /* Command execution */ | |
1466 | /* */ | |
1467 | /*********************************************************************/ | |
1468 | ||
1469 | ||
876c9d3a MT |
1470 | /** |
1471 | * @brief Prepare a scan command to be sent to the firmware | |
1472 | * | |
ffd074fc HS |
1473 | * Called via lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, ...) |
1474 | * from cmd.c | |
876c9d3a | 1475 | * |
efad798b | 1476 | * Sends a fixed length data part (specifying the BSS type and BSSID filters) |
e56188ac | 1477 | * as well as a variable number/length of TLVs to the firmware. |
876c9d3a | 1478 | * |
69f9032d | 1479 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
1480 | * @param cmd A pointer to cmd_ds_command structure to be sent to |
1481 | * firmware with the cmd_DS_801_11_SCAN structure | |
10078321 | 1482 | * @param pdata_buf Void pointer cast of a lbs_scan_cmd_config struct used |
876c9d3a MT |
1483 | * to set the fields/TLVs for the command sent to firmware |
1484 | * | |
1485 | * @return 0 or -1 | |
876c9d3a | 1486 | */ |
69f9032d | 1487 | int lbs_cmd_80211_scan(struct lbs_private *priv, |
ffd074fc | 1488 | struct cmd_ds_command *cmd, void *pdata_buf) |
876c9d3a MT |
1489 | { |
1490 | struct cmd_ds_802_11_scan *pscan = &cmd->params.scan; | |
10078321 | 1491 | struct lbs_scan_cmd_config *pscancfg = pdata_buf; |
876c9d3a | 1492 | |
e56188ac | 1493 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a MT |
1494 | |
1495 | /* Set fixed field variables in scan command */ | |
1496 | pscan->bsstype = pscancfg->bsstype; | |
492b6da7 | 1497 | memcpy(pscan->bssid, pscancfg->bssid, ETH_ALEN); |
876c9d3a MT |
1498 | memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen); |
1499 | ||
876c9d3a | 1500 | /* size is equal to the sizeof(fixed portions) + the TLV len + header */ |
492b6da7 DW |
1501 | cmd->size = cpu_to_le16(sizeof(pscan->bsstype) + ETH_ALEN |
1502 | + pscancfg->tlvbufferlen + S_DS_GEN); | |
876c9d3a | 1503 | |
e56188ac | 1504 | lbs_deb_leave(LBS_DEB_SCAN); |
876c9d3a MT |
1505 | return 0; |
1506 | } | |
1507 | ||
1508 | /** | |
1509 | * @brief This function handles the command response of scan | |
1510 | * | |
e56188ac HS |
1511 | * Called from handle_cmd_response() in cmdrespc. |
1512 | * | |
876c9d3a MT |
1513 | * The response buffer for the scan command has the following |
1514 | * memory layout: | |
1515 | * | |
1516 | * .-----------------------------------------------------------. | |
1517 | * | header (4 * sizeof(u16)): Standard command response hdr | | |
1518 | * .-----------------------------------------------------------. | |
1519 | * | bufsize (u16) : sizeof the BSS Description data | | |
1520 | * .-----------------------------------------------------------. | |
1521 | * | NumOfSet (u8) : Number of BSS Descs returned | | |
1522 | * .-----------------------------------------------------------. | |
1523 | * | BSSDescription data (variable, size given in bufsize) | | |
1524 | * .-----------------------------------------------------------. | |
1525 | * | TLV data (variable, size calculated using header->size, | | |
1526 | * | bufsize and sizeof the fixed fields above) | | |
1527 | * .-----------------------------------------------------------. | |
1528 | * | |
69f9032d | 1529 | * @param priv A pointer to struct lbs_private structure |
876c9d3a MT |
1530 | * @param resp A pointer to cmd_ds_command |
1531 | * | |
1532 | * @return 0 or -1 | |
1533 | */ | |
69f9032d | 1534 | int lbs_ret_80211_scan(struct lbs_private *priv, struct cmd_ds_command *resp) |
876c9d3a | 1535 | { |
876c9d3a | 1536 | struct cmd_ds_802_11_scan_rsp *pscan; |
fcdb53db DW |
1537 | struct bss_descriptor * iter_bss; |
1538 | struct bss_descriptor * safe; | |
876c9d3a MT |
1539 | u8 *pbssinfo; |
1540 | u16 scanrespsize; | |
1541 | int bytesleft; | |
876c9d3a MT |
1542 | int idx; |
1543 | int tlvbufsize; | |
9012b28a | 1544 | int ret; |
876c9d3a | 1545 | |
e56188ac | 1546 | lbs_deb_enter(LBS_DEB_SCAN); |
876c9d3a | 1547 | |
fcdb53db | 1548 | /* Prune old entries from scan table */ |
aa21c004 | 1549 | list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) { |
fcdb53db DW |
1550 | unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE; |
1551 | if (time_before(jiffies, stale_time)) | |
1552 | continue; | |
aa21c004 | 1553 | list_move_tail (&iter_bss->list, &priv->network_free_list); |
fcdb53db DW |
1554 | clear_bss_descriptor(iter_bss); |
1555 | } | |
1556 | ||
876c9d3a MT |
1557 | pscan = &resp->params.scanresp; |
1558 | ||
fcdb53db DW |
1559 | if (pscan->nr_sets > MAX_NETWORK_COUNT) { |
1560 | lbs_deb_scan( | |
1561 | "SCAN_RESP: too many scan results (%d, max %d)!!\n", | |
1562 | pscan->nr_sets, MAX_NETWORK_COUNT); | |
9012b28a HS |
1563 | ret = -1; |
1564 | goto done; | |
876c9d3a MT |
1565 | } |
1566 | ||
e7240aca | 1567 | bytesleft = le16_to_cpu(pscan->bssdescriptsize); |
9012b28a | 1568 | lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft); |
876c9d3a | 1569 | |
e7240aca DW |
1570 | scanrespsize = le16_to_cpu(resp->size); |
1571 | lbs_deb_scan("SCAN_RESP: scan results %d\n", pscan->nr_sets); | |
876c9d3a | 1572 | |
876c9d3a MT |
1573 | pbssinfo = pscan->bssdesc_and_tlvbuffer; |
1574 | ||
1575 | /* The size of the TLV buffer is equal to the entire command response | |
1576 | * size (scanrespsize) minus the fixed fields (sizeof()'s), the | |
1577 | * BSS Descriptions (bssdescriptsize as bytesLef) and the command | |
1578 | * response header (S_DS_GEN) | |
1579 | */ | |
1580 | tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize) | |
1581 | + sizeof(pscan->nr_sets) | |
1582 | + S_DS_GEN); | |
1583 | ||
876c9d3a MT |
1584 | /* |
1585 | * Process each scan response returned (pscan->nr_sets). Save | |
1586 | * the information in the newbssentry and then insert into the | |
1587 | * driver scan table either as an update to an existing entry | |
1588 | * or as an addition at the end of the table | |
1589 | */ | |
1590 | for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) { | |
fcdb53db DW |
1591 | struct bss_descriptor new; |
1592 | struct bss_descriptor * found = NULL; | |
fcdb53db | 1593 | struct bss_descriptor * oldest = NULL; |
0795af57 | 1594 | DECLARE_MAC_BUF(mac); |
876c9d3a MT |
1595 | |
1596 | /* Process the data fields and IEs returned for this BSS */ | |
fcdb53db | 1597 | memset(&new, 0, sizeof (struct bss_descriptor)); |
10078321 | 1598 | if (lbs_process_bss(&new, &pbssinfo, &bytesleft) != 0) { |
fcdb53db DW |
1599 | /* error parsing the scan response, skipped */ |
1600 | lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n"); | |
1601 | continue; | |
1602 | } | |
876c9d3a | 1603 | |
fcdb53db | 1604 | /* Try to find this bss in the scan table */ |
aa21c004 | 1605 | list_for_each_entry (iter_bss, &priv->network_list, list) { |
fcdb53db DW |
1606 | if (is_same_network(iter_bss, &new)) { |
1607 | found = iter_bss; | |
1608 | break; | |
876c9d3a MT |
1609 | } |
1610 | ||
fcdb53db DW |
1611 | if ((oldest == NULL) || |
1612 | (iter_bss->last_scanned < oldest->last_scanned)) | |
1613 | oldest = iter_bss; | |
1614 | } | |
876c9d3a | 1615 | |
fcdb53db DW |
1616 | if (found) { |
1617 | /* found, clear it */ | |
1618 | clear_bss_descriptor(found); | |
aa21c004 | 1619 | } else if (!list_empty(&priv->network_free_list)) { |
fcdb53db | 1620 | /* Pull one from the free list */ |
aa21c004 | 1621 | found = list_entry(priv->network_free_list.next, |
fcdb53db | 1622 | struct bss_descriptor, list); |
aa21c004 | 1623 | list_move_tail(&found->list, &priv->network_list); |
fcdb53db DW |
1624 | } else if (oldest) { |
1625 | /* If there are no more slots, expire the oldest */ | |
1626 | found = oldest; | |
1627 | clear_bss_descriptor(found); | |
aa21c004 | 1628 | list_move_tail(&found->list, &priv->network_list); |
876c9d3a | 1629 | } else { |
fcdb53db DW |
1630 | continue; |
1631 | } | |
876c9d3a | 1632 | |
ffd074fc | 1633 | lbs_deb_scan("SCAN_RESP: BSSID %s\n", |
0795af57 | 1634 | print_mac(mac, new.bssid)); |
fcdb53db | 1635 | |
fcdb53db DW |
1636 | /* Copy the locally created newbssentry to the scan table */ |
1637 | memcpy(found, &new, offsetof(struct bss_descriptor, list)); | |
1638 | } | |
876c9d3a | 1639 | |
9012b28a | 1640 | ret = 0; |
876c9d3a | 1641 | |
9012b28a HS |
1642 | done: |
1643 | lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret); | |
1644 | return ret; | |
876c9d3a | 1645 | } |