/
iwlist.c
2245 lines (2026 loc) · 60.6 KB
/
iwlist.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Wireless Tools
*
* Jean II - HPLB '99 - HPL 99->07
*
* This tool can access various piece of information on the card
* not part of iwconfig...
* You need to link this code against "iwlist.c" and "-lm".
*
* This file is released under the GPL license.
* Copyright (c) 1997-2007 Jean Tourrilhes <jt@hpl.hp.com>
*/
#include "iwlib-private.h" /* Private header */
#include <sys/time.h>
/****************************** TYPES ******************************/
/*
* Scan state and meta-information, used to decode events...
*/
typedef struct iwscan_state
{
/* State */
int ap_num; /* Access Point number 1->N */
int val_index; /* Value in table 0->(N-1) */
} iwscan_state;
/*
* Bit to name mapping
*/
typedef struct iwmask_name
{
unsigned int mask; /* bit mask for the value */
const char * name; /* human readable name for the value */
} iwmask_name;
/*
* Types of authentication parameters
*/
typedef struct iw_auth_descr
{
int value; /* Type of auth value */
const char * label; /* User readable version */
const struct iwmask_name * names; /* Names for this value */
const int num_names; /* Number of names */
} iw_auth_descr;
/**************************** CONSTANTS ****************************/
#define IW_SCAN_HACK 0x8000
#define IW_EXTKEY_SIZE (sizeof(struct iw_encode_ext) + IW_ENCODING_TOKEN_MAX)
/* ------------------------ WPA CAPA NAMES ------------------------ */
/*
* This is the user readable name of a bunch of WPA constants in wireless.h
* Maybe this should go in iwlib.c ?
*/
#ifndef WE_ESSENTIAL
#define IW_ARRAY_LEN(x) (sizeof(x)/sizeof((x)[0]))
//static const struct iwmask_name iw_enc_mode_name[] = {
// { IW_ENCODE_RESTRICTED, "restricted" },
// { IW_ENCODE_OPEN, "open" },
//};
//#define IW_ENC_MODE_NUM IW_ARRAY_LEN(iw_enc_mode_name)
static const struct iwmask_name iw_auth_capa_name[] = {
{ IW_ENC_CAPA_WPA, "WPA" },
{ IW_ENC_CAPA_WPA2, "WPA2" },
{ IW_ENC_CAPA_CIPHER_TKIP, "CIPHER-TKIP" },
{ IW_ENC_CAPA_CIPHER_CCMP, "CIPHER-CCMP" },
};
#define IW_AUTH_CAPA_NUM IW_ARRAY_LEN(iw_auth_capa_name)
static const struct iwmask_name iw_auth_cypher_name[] = {
{ IW_AUTH_CIPHER_NONE, "none" },
{ IW_AUTH_CIPHER_WEP40, "WEP-40" },
{ IW_AUTH_CIPHER_TKIP, "TKIP" },
{ IW_AUTH_CIPHER_CCMP, "CCMP" },
{ IW_AUTH_CIPHER_WEP104, "WEP-104" },
};
#define IW_AUTH_CYPHER_NUM IW_ARRAY_LEN(iw_auth_cypher_name)
static const struct iwmask_name iw_wpa_ver_name[] = {
{ IW_AUTH_WPA_VERSION_DISABLED, "disabled" },
{ IW_AUTH_WPA_VERSION_WPA, "WPA" },
{ IW_AUTH_WPA_VERSION_WPA2, "WPA2" },
};
#define IW_WPA_VER_NUM IW_ARRAY_LEN(iw_wpa_ver_name)
static const struct iwmask_name iw_auth_key_mgmt_name[] = {
{ IW_AUTH_KEY_MGMT_802_1X, "802.1x" },
{ IW_AUTH_KEY_MGMT_PSK, "PSK" },
};
#define IW_AUTH_KEY_MGMT_NUM IW_ARRAY_LEN(iw_auth_key_mgmt_name)
static const struct iwmask_name iw_auth_alg_name[] = {
{ IW_AUTH_ALG_OPEN_SYSTEM, "open" },
{ IW_AUTH_ALG_SHARED_KEY, "shared-key" },
{ IW_AUTH_ALG_LEAP, "LEAP" },
};
#define IW_AUTH_ALG_NUM IW_ARRAY_LEN(iw_auth_alg_name)
static const struct iw_auth_descr iw_auth_settings[] = {
{ IW_AUTH_WPA_VERSION, "WPA version", iw_wpa_ver_name, IW_WPA_VER_NUM },
{ IW_AUTH_KEY_MGMT, "Key management", iw_auth_key_mgmt_name, IW_AUTH_KEY_MGMT_NUM },
{ IW_AUTH_CIPHER_PAIRWISE, "Pairwise cipher", iw_auth_cypher_name, IW_AUTH_CYPHER_NUM },
{ IW_AUTH_CIPHER_GROUP, "Pairwise cipher", iw_auth_cypher_name, IW_AUTH_CYPHER_NUM },
{ IW_AUTH_TKIP_COUNTERMEASURES, "TKIP countermeasures", NULL, 0 },
{ IW_AUTH_DROP_UNENCRYPTED, "Drop unencrypted", NULL, 0 },
{ IW_AUTH_80211_AUTH_ALG, "Authentication algorithm", iw_auth_alg_name, IW_AUTH_ALG_NUM },
{ IW_AUTH_RX_UNENCRYPTED_EAPOL, "Receive unencrypted EAPOL", NULL, 0 },
{ IW_AUTH_ROAMING_CONTROL, "Roaming control", NULL, 0 },
{ IW_AUTH_PRIVACY_INVOKED, "Privacy invoked", NULL, 0 },
};
#define IW_AUTH_SETTINGS_NUM IW_ARRAY_LEN(iw_auth_settings)
/* Values for the IW_ENCODE_ALG_* returned by SIOCSIWENCODEEXT */
static const char * iw_encode_alg_name[] = {
"none",
"WEP",
"TKIP",
"CCMP",
"unknown"
};
#define IW_ENCODE_ALG_NUM IW_ARRAY_LEN(iw_encode_alg_name)
#ifndef IW_IE_CIPHER_NONE
/* Cypher values in GENIE (pairwise and group) */
#define IW_IE_CIPHER_NONE 0
#define IW_IE_CIPHER_WEP40 1
#define IW_IE_CIPHER_TKIP 2
#define IW_IE_CIPHER_WRAP 3
#define IW_IE_CIPHER_CCMP 4
#define IW_IE_CIPHER_WEP104 5
/* Key management in GENIE */
#define IW_IE_KEY_MGMT_NONE 0
#define IW_IE_KEY_MGMT_802_1X 1
#define IW_IE_KEY_MGMT_PSK 2
#endif /* IW_IE_CIPHER_NONE */
/* Values for the IW_IE_CIPHER_* in GENIE */
static const char * iw_ie_cypher_name[] = {
"none",
"WEP-40",
"TKIP",
"WRAP",
"CCMP",
"WEP-104",
};
#define IW_IE_CYPHER_NUM IW_ARRAY_LEN(iw_ie_cypher_name)
/* Values for the IW_IE_KEY_MGMT_* in GENIE */
static const char * iw_ie_key_mgmt_name[] = {
"none",
"802.1x",
"PSK",
};
#define IW_IE_KEY_MGMT_NUM IW_ARRAY_LEN(iw_ie_key_mgmt_name)
#endif /* WE_ESSENTIAL */
/************************* WPA SUBROUTINES *************************/
#ifndef WE_ESSENTIAL
/*------------------------------------------------------------------*/
/*
* Print all names corresponding to a mask.
* This may want to be used in iw_print_retry_value() ?
*/
static void
iw_print_mask_name(unsigned int mask,
const struct iwmask_name names[],
const unsigned int num_names,
const char * sep)
{
unsigned int i;
/* Print out all names for the bitmask */
for(i = 0; i < num_names; i++)
{
if(mask & names[i].mask)
{
/* Print out */
printf("%s%s", sep, names[i].name);
/* Remove the bit from the mask */
mask &= ~names[i].mask;
}
}
/* If there is unconsumed bits... */
if(mask != 0)
printf("%sUnknown", sep);
}
/*------------------------------------------------------------------*/
/*
* Print the name corresponding to a value, with overflow check.
*/
static void
iw_print_value_name(unsigned int value,
const char * names[],
const unsigned int num_names)
{
if(value >= num_names)
printf(" unknown (%d)", value);
else
printf(" %s", names[value]);
}
/*------------------------------------------------------------------*/
/*
* Parse, and display the results of an unknown IE.
*
*/
static void
iw_print_ie_unknown(unsigned char * iebuf,
int buflen)
{
int ielen = iebuf[1] + 2;
int i;
if(ielen > buflen)
ielen = buflen;
printf("Unknown: ");
for(i = 0; i < ielen; i++)
printf("%02X", iebuf[i]);
printf("\n");
}
/*------------------------------------------------------------------*/
/*
* Parse, and display the results of a WPA or WPA2 IE.
*
*/
static inline void
iw_print_ie_wpa(unsigned char * iebuf,
int buflen)
{
int ielen = iebuf[1] + 2;
int offset = 2; /* Skip the IE id, and the length. */
unsigned char wpa1_oui[3] = {0x00, 0x50, 0xf2};
unsigned char wpa2_oui[3] = {0x00, 0x0f, 0xac};
unsigned char * wpa_oui;
int i;
uint16_t ver = 0;
uint16_t cnt = 0;
if(ielen > buflen)
ielen = buflen;
#ifdef DEBUG
/* Debugging code. In theory useless, because it's debugged ;-) */
printf("IE raw value %d [%02X", buflen, iebuf[0]);
for(i = 1; i < buflen; i++)
printf(":%02X", iebuf[i]);
printf("]\n");
#endif
switch(iebuf[0])
{
case 0x30: /* WPA2 */
/* Check if we have enough data */
if(ielen < 4)
{
iw_print_ie_unknown(iebuf, buflen);
return;
}
wpa_oui = wpa2_oui;
break;
case 0xdd: /* WPA or else */
wpa_oui = wpa1_oui;
/* Not all IEs that start with 0xdd are WPA.
* So check that the OUI is valid. Note : offset==2 */
if((ielen < 8)
|| (memcmp(&iebuf[offset], wpa_oui, 3) != 0)
|| (iebuf[offset + 3] != 0x01))
{
iw_print_ie_unknown(iebuf, buflen);
return;
}
/* Skip the OUI type */
offset += 4;
break;
default:
return;
}
/* Pick version number (little endian) */
ver = iebuf[offset] | (iebuf[offset + 1] << 8);
offset += 2;
if(iebuf[0] == 0xdd)
printf("WPA Version %d\n", ver);
if(iebuf[0] == 0x30)
printf("IEEE 802.11i/WPA2 Version %d\n", ver);
/* From here, everything is technically optional. */
/* Check if we are done */
if(ielen < (offset + 4))
{
/* We have a short IE. So we should assume TKIP/TKIP. */
printf(" Group Cipher : TKIP\n");
printf(" Pairwise Cipher : TKIP\n");
return;
}
/* Next we have our group cipher. */
if(memcmp(&iebuf[offset], wpa_oui, 3) != 0)
{
printf(" Group Cipher : Proprietary\n");
}
else
{
printf(" Group Cipher :");
iw_print_value_name(iebuf[offset+3],
iw_ie_cypher_name, IW_IE_CYPHER_NUM);
printf("\n");
}
offset += 4;
/* Check if we are done */
if(ielen < (offset + 2))
{
/* We don't have a pairwise cipher, or auth method. Assume TKIP. */
printf(" Pairwise Ciphers : TKIP\n");
return;
}
/* Otherwise, we have some number of pairwise ciphers. */
cnt = iebuf[offset] | (iebuf[offset + 1] << 8);
offset += 2;
printf(" Pairwise Ciphers (%d) :", cnt);
if(ielen < (offset + 4*cnt))
return;
for(i = 0; i < cnt; i++)
{
if(memcmp(&iebuf[offset], wpa_oui, 3) != 0)
{
printf(" Proprietary");
}
else
{
iw_print_value_name(iebuf[offset+3],
iw_ie_cypher_name, IW_IE_CYPHER_NUM);
}
offset+=4;
}
printf("\n");
/* Check if we are done */
if(ielen < (offset + 2))
return;
/* Now, we have authentication suites. */
cnt = iebuf[offset] | (iebuf[offset + 1] << 8);
offset += 2;
printf(" Authentication Suites (%d) :", cnt);
if(ielen < (offset + 4*cnt))
return;
for(i = 0; i < cnt; i++)
{
if(memcmp(&iebuf[offset], wpa_oui, 3) != 0)
{
printf(" Proprietary");
}
else
{
iw_print_value_name(iebuf[offset+3],
iw_ie_key_mgmt_name, IW_IE_KEY_MGMT_NUM);
}
offset+=4;
}
printf("\n");
/* Check if we are done */
if(ielen < (offset + 1))
return;
/* Otherwise, we have capabilities bytes.
* For now, we only care about preauth which is in bit position 1 of the
* first byte. (But, preauth with WPA version 1 isn't supposed to be
* allowed.) 8-) */
if(iebuf[offset] & 0x01)
{
printf(" Preauthentication Supported\n");
}
}
/*------------------------------------------------------------------*/
/*
* Process a generic IE and display the info in human readable form
* for some of the most interesting ones.
* For now, we only decode the WPA IEs.
*/
static inline void
iw_print_gen_ie(unsigned char * buffer,
int buflen)
{
int offset = 0;
/* Loop on each IE, each IE is minimum 2 bytes */
while(offset <= (buflen - 2))
{
printf(" IE: ");
/* Check IE type */
switch(buffer[offset])
{
case 0xdd: /* WPA1 (and other) */
case 0x30: /* WPA2 */
iw_print_ie_wpa(buffer + offset, buflen);
break;
default:
iw_print_ie_unknown(buffer + offset, buflen);
}
/* Skip over this IE to the next one in the list. */
offset += buffer[offset+1] + 2;
}
}
#endif /* WE_ESSENTIAL */
/***************************** SCANNING *****************************/
/*
* This one behave quite differently from the others
*
* Note that we don't use the scanning capability of iwlib (functions
* iw_process_scan() and iw_scan()). The main reason is that
* iw_process_scan() return only a subset of the scan data to the caller,
* for example custom elements and bitrates are ommited. Here, we
* do the complete job...
*/
/*------------------------------------------------------------------*/
/*
* Print one element from the scanning results
*/
static inline void
print_scanning_token(struct stream_descr * stream, /* Stream of events */
struct iw_event * event, /* Extracted token */
struct iwscan_state * state,
struct iw_range * iw_range, /* Range info */
int has_range)
{
char buffer[128]; /* Temporary buffer */
/* Now, let's decode the event */
switch(event->cmd)
{
case SIOCGIWAP:
printf(" Cell %02d - Address: %s\n", state->ap_num,
iw_saether_ntop(&event->u.ap_addr, buffer));
state->ap_num++;
break;
case SIOCGIWNWID:
if(event->u.nwid.disabled)
printf(" NWID:off/any\n");
else
printf(" NWID:%X\n", event->u.nwid.value);
break;
case SIOCGIWFREQ:
{
double freq; /* Frequency/channel */
int channel = -1; /* Converted to channel */
freq = iw_freq2float(&(event->u.freq));
/* Convert to channel if possible */
if(has_range)
channel = iw_freq_to_channel(freq, iw_range);
iw_print_freq(buffer, sizeof(buffer),
freq, channel, event->u.freq.flags);
printf(" %s\n", buffer);
}
break;
case SIOCGIWMODE:
/* Note : event->u.mode is unsigned, no need to check <= 0 */
if(event->u.mode >= IW_NUM_OPER_MODE)
event->u.mode = IW_NUM_OPER_MODE;
printf(" Mode:%s\n",
iw_operation_mode[event->u.mode]);
break;
case SIOCGIWNAME:
printf(" Protocol:%-1.16s\n", event->u.name);
break;
case SIOCGIWESSID:
{
char essid[4*IW_ESSID_MAX_SIZE+1];
memset(essid, '\0', sizeof(essid));
if((event->u.essid.pointer) && (event->u.essid.length))
iw_essid_escape(essid,
event->u.essid.pointer, event->u.essid.length);
if(event->u.essid.flags)
{
/* Does it have an ESSID index ? */
if((event->u.essid.flags & IW_ENCODE_INDEX) > 1)
printf(" ESSID:\"%s\" [%d]\n", essid,
(event->u.essid.flags & IW_ENCODE_INDEX));
else
printf(" ESSID:\"%s\"\n", essid);
}
else
printf(" ESSID:off/any/hidden\n");
}
break;
case SIOCGIWENCODE:
{
unsigned char key[IW_ENCODING_TOKEN_MAX];
if(event->u.data.pointer)
memcpy(key, event->u.data.pointer, event->u.data.length);
else
event->u.data.flags |= IW_ENCODE_NOKEY;
printf(" Encryption key:");
if(event->u.data.flags & IW_ENCODE_DISABLED)
printf("off\n");
else
{
/* Display the key */
iw_print_key(buffer, sizeof(buffer), key, event->u.data.length,
event->u.data.flags);
printf("%s", buffer);
/* Other info... */
if((event->u.data.flags & IW_ENCODE_INDEX) > 1)
printf(" [%d]", event->u.data.flags & IW_ENCODE_INDEX);
if(event->u.data.flags & IW_ENCODE_RESTRICTED)
printf(" Security mode:restricted");
if(event->u.data.flags & IW_ENCODE_OPEN)
printf(" Security mode:open");
printf("\n");
}
}
break;
case SIOCGIWRATE:
if(state->val_index == 0)
printf(" Bit Rates:");
else
if((state->val_index % 5) == 0)
printf("\n ");
else
printf("; ");
iw_print_bitrate(buffer, sizeof(buffer), event->u.bitrate.value);
printf("%s", buffer);
/* Check for termination */
if(stream->value == NULL)
{
printf("\n");
state->val_index = 0;
}
else
state->val_index++;
break;
case SIOCGIWMODUL:
{
unsigned int modul = event->u.param.value;
int i;
int n = 0;
printf(" Modulations :");
for(i = 0; i < IW_SIZE_MODUL_LIST; i++)
{
if((modul & iw_modul_list[i].mask) == iw_modul_list[i].mask)
{
if((n++ % 8) == 7)
printf("\n ");
else
printf(" ; ");
printf("%s", iw_modul_list[i].cmd);
}
}
printf("\n");
}
break;
case IWEVQUAL:
iw_print_stats(buffer, sizeof(buffer),
&event->u.qual, iw_range, has_range);
printf(" %s\n", buffer);
break;
#ifndef WE_ESSENTIAL
case IWEVGENIE:
/* Informations Elements are complex, let's do only some of them */
iw_print_gen_ie(event->u.data.pointer, event->u.data.length);
break;
#endif /* WE_ESSENTIAL */
case IWEVCUSTOM:
{
char custom[IW_CUSTOM_MAX+1];
if((event->u.data.pointer) && (event->u.data.length))
memcpy(custom, event->u.data.pointer, event->u.data.length);
custom[event->u.data.length] = '\0';
printf(" Extra:%s\n", custom);
}
break;
default:
printf(" (Unknown Wireless Token 0x%04X)\n",
event->cmd);
} /* switch(event->cmd) */
}
/*------------------------------------------------------------------*/
/*
* Perform a scanning on one device
*/
static int
print_scanning_info(int skfd,
char * ifname,
char * args[], /* Command line args */
int count) /* Args count */
{
struct iwreq wrq;
struct iw_scan_req scanopt; /* Options for 'set' */
int scanflags = 0; /* Flags for scan */
unsigned char * buffer = NULL; /* Results */
int buflen = IW_SCAN_MAX_DATA; /* Min for compat WE<17 */
struct iw_range range;
int has_range;
struct timeval tv; /* Select timeout */
int timeout = 15000000; /* 15s */
/* Avoid "Unused parameter" warning */
args = args; count = count;
/* Debugging stuff */
if((IW_EV_LCP_PK2_LEN != IW_EV_LCP_PK_LEN) || (IW_EV_POINT_PK2_LEN != IW_EV_POINT_PK_LEN))
{
fprintf(stderr, "*** Please report to jt@hpl.hp.com your platform details\n");
fprintf(stderr, "*** and the following line :\n");
fprintf(stderr, "*** IW_EV_LCP_PK2_LEN = %zu ; IW_EV_POINT_PK2_LEN = %zu\n\n",
IW_EV_LCP_PK2_LEN, IW_EV_POINT_PK2_LEN);
}
/* Get range stuff */
has_range = (iw_get_range_info(skfd, ifname, &range) >= 0);
/* Check if the interface could support scanning. */
if((!has_range) || (range.we_version_compiled < 14))
{
fprintf(stderr, "%-8.16s Interface doesn't support scanning.\n\n",
ifname);
return(-1);
}
/* Init timeout value -> 250ms between set and first get */
tv.tv_sec = 0;
tv.tv_usec = 250000;
/* Clean up set args */
memset(&scanopt, 0, sizeof(scanopt));
/* Parse command line arguments and extract options.
* Note : when we have enough options, we should use the parser
* from iwconfig... */
while(count > 0)
{
/* One arg is consumed (the option name) */
count--;
/*
* Check for Active Scan (scan with specific essid)
*/
if(!strncmp(args[0], "essid", 5))
{
if(count < 1)
{
fprintf(stderr, "Too few arguments for scanning option [%s]\n",
args[0]);
return(-1);
}
args++;
count--;
/* Store the ESSID in the scan options */
scanopt.essid_len = strlen(args[0]);
memcpy(scanopt.essid, args[0], scanopt.essid_len);
/* Initialise BSSID as needed */
if(scanopt.bssid.sa_family == 0)
{
scanopt.bssid.sa_family = ARPHRD_ETHER;
memset(scanopt.bssid.sa_data, 0xff, ETH_ALEN);
}
/* Scan only this ESSID */
scanflags |= IW_SCAN_THIS_ESSID;
}
else
/* Check for last scan result (do not trigger scan) */
if(!strncmp(args[0], "last", 4))
{
/* Hack */
scanflags |= IW_SCAN_HACK;
}
else
{
fprintf(stderr, "Invalid scanning option [%s]\n", args[0]);
return(-1);
}
/* Next arg */
args++;
}
/* Check if we have scan options */
if(scanflags)
{
wrq.u.data.pointer = (caddr_t) &scanopt;
wrq.u.data.length = sizeof(scanopt);
wrq.u.data.flags = scanflags;
}
else
{
wrq.u.data.pointer = NULL;
wrq.u.data.flags = 0;
wrq.u.data.length = 0;
}
/* If only 'last' was specified on command line, don't trigger a scan */
if(scanflags == IW_SCAN_HACK)
{
/* Skip waiting */
tv.tv_usec = 0;
}
else
{
/* Initiate Scanning */
if(iw_set_ext(skfd, ifname, SIOCSIWSCAN, &wrq) < 0)
{
if((errno != EPERM) || (scanflags != 0))
{
fprintf(stderr, "%-8.16s Interface doesn't support scanning : %s\n\n",
ifname, strerror(errno));
return(-1);
}
/* If we don't have the permission to initiate the scan, we may
* still have permission to read left-over results.
* But, don't wait !!! */
#if 0
/* Not cool, it display for non wireless interfaces... */
fprintf(stderr, "%-8.16s (Could not trigger scanning, just reading left-over results)\n", ifname);
#endif
tv.tv_usec = 0;
}
}
timeout -= tv.tv_usec;
/* Forever */
while(1)
{
fd_set rfds; /* File descriptors for select */
int last_fd; /* Last fd */
int ret;
/* Guess what ? We must re-generate rfds each time */
FD_ZERO(&rfds);
last_fd = -1;
/* In here, add the rtnetlink fd in the list */
/* Wait until something happens */
ret = select(last_fd + 1, &rfds, NULL, NULL, &tv);
/* Check if there was an error */
if(ret < 0)
{
if(errno == EAGAIN || errno == EINTR)
continue;
fprintf(stderr, "Unhandled signal - exiting...\n");
return(-1);
}
/* Check if there was a timeout */
if(ret == 0)
{
unsigned char * newbuf;
realloc:
/* (Re)allocate the buffer - realloc(NULL, len) == malloc(len) */
newbuf = realloc(buffer, buflen);
if(newbuf == NULL)
{
if(buffer)
free(buffer);
fprintf(stderr, "%s: Allocation failed\n", __FUNCTION__);
return(-1);
}
buffer = newbuf;
/* Try to read the results */
wrq.u.data.pointer = buffer;
wrq.u.data.flags = 0;
wrq.u.data.length = buflen;
if(iw_get_ext(skfd, ifname, SIOCGIWSCAN, &wrq) < 0)
{
/* Check if buffer was too small (WE-17 only) */
if((errno == E2BIG) && (range.we_version_compiled > 16)
&& (buflen < 0xFFFF))
{
/* Some driver may return very large scan results, either
* because there are many cells, or because they have many
* large elements in cells (like IWEVCUSTOM). Most will
* only need the regular sized buffer. We now use a dynamic
* allocation of the buffer to satisfy everybody. Of course,
* as we don't know in advance the size of the array, we try
* various increasing sizes. Jean II */
/* Check if the driver gave us any hints. */
if(wrq.u.data.length > buflen)
buflen = wrq.u.data.length;
else
buflen *= 2;
/* wrq.u.data.length is 16 bits so max size is 65535 */
if(buflen > 0xFFFF)
buflen = 0xFFFF;
/* Try again */
goto realloc;
}
/* Check if results not available yet */
if(errno == EAGAIN)
{
/* Restart timer for only 100ms*/
tv.tv_sec = 0;
tv.tv_usec = 100000;
timeout -= tv.tv_usec;
if(timeout > 0)
continue; /* Try again later */
}
/* Bad error */
free(buffer);
fprintf(stderr, "%-8.16s Failed to read scan data : %s\n\n",
ifname, strerror(errno));
return(-2);
}
else
/* We have the results, go to process them */
break;
}
/* In here, check if event and event type
* if scan event, read results. All errors bad & no reset timeout */
}
if(wrq.u.data.length)
{
struct iw_event iwe;
struct stream_descr stream;
struct iwscan_state state = { .ap_num = 1, .val_index = 0 };
int ret;
#ifdef DEBUG
/* Debugging code. In theory useless, because it's debugged ;-) */
int i;
printf("Scan result %d [%02X", wrq.u.data.length, buffer[0]);
for(i = 1; i < wrq.u.data.length; i++)
printf(":%02X", buffer[i]);
printf("]\n");
#endif
printf("%-8.16s Scan completed :\n", ifname);
iw_init_event_stream(&stream, (char *) buffer, wrq.u.data.length);
do
{
/* Extract an event and print it */
ret = iw_extract_event_stream(&stream, &iwe,
range.we_version_compiled);
if(ret > 0)
print_scanning_token(&stream, &iwe, &state,
&range, has_range);
}
while(ret > 0);
printf("\n");
}
else
printf("%-8.16s No scan results\n\n", ifname);
free(buffer);
return(0);
}
/*********************** FREQUENCIES/CHANNELS ***********************/
/*------------------------------------------------------------------*/
/*
* Print the number of channels and available frequency for the device
*/
static int
print_freq_info(int skfd,
char * ifname,
char * args[], /* Command line args */
int count) /* Args count */
{
struct iwreq wrq;
struct iw_range range;
double freq;
int k;
int channel;
char buffer[128]; /* Temporary buffer */
/* Avoid "Unused parameter" warning */
args = args; count = count;
/* Get list of frequencies / channels */
if(iw_get_range_info(skfd, ifname, &range) < 0)
fprintf(stderr, "%-8.16s no frequency information.\n\n",
ifname);
else
{
if(range.num_frequency > 0)
{
printf("%-8.16s %d channels in total; available frequencies :\n",
ifname, range.num_channels);
/* Print them all */
for(k = 0; k < range.num_frequency; k++)
{
freq = iw_freq2float(&(range.freq[k]));
iw_print_freq_value(buffer, sizeof(buffer), freq);
printf(" Channel %.2d : %s\n",
range.freq[k].i, buffer);
}
}
else
printf("%-8.16s %d channels\n",
ifname, range.num_channels);
/* Get current frequency / channel and display it */
if(iw_get_ext(skfd, ifname, SIOCGIWFREQ, &wrq) >= 0)
{
freq = iw_freq2float(&(wrq.u.freq));
channel = iw_freq_to_channel(freq, &range);
iw_print_freq(buffer, sizeof(buffer),
freq, channel, wrq.u.freq.flags);
printf(" Current %s\n\n", buffer);
}
}
return(0);
}
/***************************** BITRATES *****************************/
/*------------------------------------------------------------------*/
/*
* Print the number of available bitrates for the device
*/
static int
print_bitrate_info(int skfd,
char * ifname,
char * args[], /* Command line args */
int count) /* Args count */
{
struct iwreq wrq;
struct iw_range range;
int k;
char buffer[128];
/* Avoid "Unused parameter" warning */
args = args; count = count;
/* Extract range info */
if(iw_get_range_info(skfd, ifname, &range) < 0)
fprintf(stderr, "%-8.16s no bit-rate information.\n\n",
ifname);
else
{
if((range.num_bitrates > 0) && (range.num_bitrates <= IW_MAX_BITRATES))
{
printf("%-8.16s %d available bit-rates :\n",
ifname, range.num_bitrates);
/* Print them all */
for(k = 0; k < range.num_bitrates; k++)
{
iw_print_bitrate(buffer, sizeof(buffer), range.bitrate[k]);
/* Maybe this should be %10s */
printf("\t %s\n", buffer);
}
}
else
printf("%-8.16s unknown bit-rate information.\n", ifname);
/* Get current bit rate */
if(iw_get_ext(skfd, ifname, SIOCGIWRATE, &wrq) >= 0)
{
iw_print_bitrate(buffer, sizeof(buffer), wrq.u.bitrate.value);
printf(" Current Bit Rate%c%s\n",
(wrq.u.bitrate.fixed ? '=' : ':'), buffer);
}
/* Try to get the broadcast bitrate if it exist... */
if(range.bitrate_capa & IW_BITRATE_BROADCAST)
{
wrq.u.bitrate.flags = IW_BITRATE_BROADCAST;